CN115025419A - Active fire fighting system and fire fighting control method for new energy vehicle - Google Patents

Active fire fighting system and fire fighting control method for new energy vehicle Download PDF

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Publication number
CN115025419A
CN115025419A CN202210414713.7A CN202210414713A CN115025419A CN 115025419 A CN115025419 A CN 115025419A CN 202210414713 A CN202210414713 A CN 202210414713A CN 115025419 A CN115025419 A CN 115025419A
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charging
temperature
vehicle
information
unit
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CN115025419B (en
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蔡果
朱文奇
鲍施锡
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Shanghai Shangyi Intelligent Technology Co ltd
Shanghai Broadway Industrial Co ltd
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Shanghai Shangyi Intelligent Technology Co ltd
Shanghai Broadway Industrial Co ltd
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses an active fire fighting system and a fire fighting control method for a new energy vehicle, wherein the active fire fighting system for the new energy vehicle comprises a central control module, a far infrared camera, an ambient temperature acquisition module and a charging pile power-off control circuit; the central control module comprises a charging information acquisition unit, a threshold setting unit and a temperature monitoring unit; the far infrared camera is used for acquiring the temperature information of the charging gun in real time; the environment temperature acquisition module is used for acquiring environment temperature information; the charging information acquisition unit is used for acquiring set charging information of the charging gun; the threshold setting unit is used for setting corresponding comparison thresholds under different environmental temperatures and different charging modes; the temperature monitoring unit is used for judging whether the temperature change of the charging gun is normal or not; fill electric pile outage control circuit and be used for receiving the control signal that central control module sent, control fills the electric pile outage. According to the invention, the charging process is cut off when the new energy vehicle is abnormally charged, so that the charging safety is improved, and a fire disaster caused by abnormal charging is avoided.

Description

Active fire fighting system and fire fighting control method for new energy vehicle
Technical Field
The invention belongs to the technical field of new energy automobile fire fighting, relates to a fire fighting system, and particularly relates to an active fire fighting system and a fire fighting control method for a new energy automobile.
Background
Along with the rapid development of the new energy automobile industry, the maturity of a sharing mode and the requirement of environmental protection, the unattended new energy automobile charging station gradually steps into the public view. Unmanned charging station can provide functions such as quick charge for new energy automobile. The special situations such as spontaneous combustion in the charging equipment abnormity, user smoking and automobile charging process can enable the charging station to have fire hazard, but because the unmanned charging station has no administrator to carry out on-site monitoring, the fire hazard of the charging station can not be found in time, and therefore great property loss risk and potential safety hazard exist in the new energy automobile charging process.
Based on above, how to guarantee that the vehicle property loss falls to minimumly under the special circumstances, avoid losing more car owner property and social basis setting simultaneously, improve unmanned charging station security, reduce the emergence of accident, be the problem that needs to solve at present urgently.
In view of this, nowadays, there is an urgent need to design an active fire protection device for a new energy charging pile so as to overcome the fire risk caused by abnormality in the existing new energy charging process.
Disclosure of Invention
The invention provides an active fire fighting system and a fire fighting control method for a new energy vehicle, which can cut off a charging process when the new energy vehicle is abnormally charged, improve charging safety and avoid fire caused by abnormal charging.
In order to solve the technical problem, according to one aspect of the present invention, the following technical solutions are adopted:
an active fire protection system for a new energy vehicle, the active fire protection system comprising: the charging system comprises a central control module, a vehicle temperature acquisition module, an ambient temperature acquisition module, a charging mode switching module and a charging pile power-off control circuit;
the central control module comprises a charging information acquisition unit, a threshold setting unit, a temperature monitoring unit, an abnormality judgment unit and a temperature rise neural network learning model;
the vehicle temperature acquisition module comprises a plurality of far infrared cameras; the first far infrared camera is arranged towards the direction of the charging gun and used for acquiring temperature information of the charging gun in real time; the second far infrared camera is arranged towards the vehicle compartment and used for acquiring the temperature information of the set area of the vehicle compartment in real time; the third far infrared camera is arranged towards the vehicle chassis and used for acquiring the temperature information of a set area of the vehicle chassis in real time;
the environment temperature acquisition module is used for acquiring environment temperature information;
the charging information acquisition unit is used for acquiring set charging information of a charging gun;
the threshold setting unit is used for setting normal threshold ranges corresponding to vehicle setting areas under different environmental temperatures and different charging modes, or/and the threshold setting unit is used for setting calculation rules of the normal threshold ranges;
the temperature monitoring unit is used for monitoring the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit to judge the temperature change of the charging gun; the abnormality judgment unit is used for judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit; if the temperature change of the charging gun in the set charging mode within the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring temperature information of a carriage set area acquired by the second far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the set area of the carriage is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of a set area of a carriage exceeds a set normal threshold range at the corresponding environmental temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring the temperature information of the vehicle chassis acquired by the third far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the vehicle chassis are normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the temperature rise neural network learning model is combined with a threshold setting unit to comprehensively set a normal threshold range or/and a calculation rule thereof; the temperature rise neural network learning model is used for establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining layer by layer and abstracting to generate high-level characteristics for helping a far infrared camera to identify temperature change; when the network is calculated in the forward direction, a plurality of convolution cores carry out convolution operation on input at a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input; in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially subjected to cross stacking and then reach a network through the full-connection layer to be output for the active learning of the whole fire protection system, so that the robustness and the accuracy of the whole active fire protection system are improved;
the mode of setting the normal threshold S by the threshold setting unit includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is charging current, R is charging muzzle resistance, and delta t is dynamic recording time;
the charging pile power-off control circuit is used for receiving the control signal sent by the central control module and controlling the charging pile to be powered off;
the active fire fighting system further comprises a second camera shooting mechanism, a distance sensor and a rotatable spraying mechanism; the central control module also comprises a visual height positioning unit and a door handle position analysis unit;
the second camera shooting mechanism is arranged towards the set parking space and used for acquiring image information in the direction of the set parking space;
the distance sensor is used for acquiring distance information between a vehicle parked in a set parking space and the distance sensor;
the visual height positioning unit is used for acquiring the height information of the door handle according to the height information of the second camera mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera mechanism;
the door handle position analysis unit is used for acquiring the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to the height information of the rotatable spraying mechanism, the distance information between the rotatable spraying mechanism and the vehicle and the height information of the door handle;
the rotatable spraying mechanism is used for adjusting a spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism;
the rotatable spraying mechanism comprises a spraying control circuit, a spraying rotary driving mechanism, a transmission mechanism and a spraying pipeline, wherein the spraying control circuit is connected with the spraying rotary driving mechanism and is used for controlling the spraying rotary driving mechanism to act; the spraying rotary driving mechanism is connected with the transmission mechanism, the transmission mechanism is connected with the spraying pipeline, and the spraying rotary driving mechanism can drive the spraying pipeline to rotate for a set angle through the transmission mechanism.
According to another aspect of the invention, the following technical scheme is adopted: an active fire protection system for a new energy vehicle, the active fire protection system comprising: the system comprises a central control module, a vehicle temperature acquisition module, an environment temperature acquisition module and a charging pile power-off control circuit;
the central control module comprises a charging information acquisition unit, a threshold setting unit and an abnormality judgment unit;
the vehicle temperature acquisition module is arranged towards a set direction and used for acquiring temperature information of a set part of a vehicle on a parking space;
the environment temperature acquisition module is used for acquiring environment temperature information;
the charging information acquisition unit is used for acquiring set charging information of the charging gun;
the threshold setting unit is used for setting corresponding normal threshold ranges under different environmental temperatures and different charging modes, or/and the threshold setting unit is used for setting calculation rules of the normal threshold ranges;
the abnormality judgment unit is used for judging whether the temperature or/and the temperature change of the vehicle set part is normal or not according to the temperature information of the vehicle set part acquired by the vehicle temperature acquisition module and the set charging information acquired by the charging information acquisition unit; if the temperature of the vehicle setting part in the set charging mode exceeds the corresponding normal threshold range, or/and if the temperature change of the vehicle setting part in the set time interval exceeds the set normal threshold range at the corresponding environment temperature, judging that the charging is abnormal;
the charging pile power-off control circuit is used for receiving the control signal sent by the central control module and controlling the charging pile to be powered off.
As an embodiment of the present invention, the vehicle temperature acquisition module includes a first far infrared camera or/and a second far infrared camera or/and a third far infrared camera; the first far infrared camera is arranged towards the direction of the charging gun and used for acquiring temperature information of the charging gun in real time; the second far infrared camera is arranged towards the vehicle compartment and used for acquiring the temperature information of the set area of the vehicle compartment in real time; the third far infrared camera is arranged towards the vehicle chassis and used for acquiring the temperature information of a set area of the vehicle chassis in real time;
the central control module comprises a temperature monitoring unit;
the temperature monitoring unit is used for monitoring the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit to judge the temperature change of the charging gun; the abnormity judging unit is used for judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquiring unit; if the temperature change of the charging gun in the set charging mode within the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring temperature information of a carriage set area acquired by the second far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the set area of the carriage is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of a set area of a carriage exceeds a set normal threshold range at the corresponding environmental temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring the temperature information of the vehicle chassis acquired by the third far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the vehicle chassis is normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds a set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the mode of setting the normal threshold S by the threshold setting unit includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is the charging current, R is the charging muzzle resistance, and Δ t is the dynamic recording time.
As an embodiment of the present invention, the central control module includes a temperature rise neural network learning model, and the temperature rise neural network learning model is combined with the threshold setting unit to comprehensively set a normal threshold range or/and a calculation rule thereof;
the temperature rise neural network learning model is used for establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining layer by layer and abstracting to generate high-level characteristics for helping a far infrared camera to identify temperature change;
when the network is calculated in the forward direction, a plurality of convolution cores carry out convolution operation on input at a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input;
in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially and alternately stacked and then reach a network to be output through the full connection layer, so that the whole fire fighting system can actively learn, and the robustness and the accuracy of the whole active fire fighting system are improved.
As an embodiment of the present invention, the active fire fighting system further comprises a second camera mechanism, a distance sensor, a rotatable spraying mechanism; the central control module also comprises a visual height positioning unit and a door handle position analysis unit;
the second camera shooting mechanism is arranged towards the set parking space and used for acquiring image information in the direction of the set parking space;
the distance sensor is used for acquiring distance information between a vehicle parked in a set parking space and the distance sensor;
the visual height positioning unit is used for acquiring the height information of the door handle according to the height information of the second camera mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera mechanism;
the door handle position analysis unit is used for acquiring the position information of the vehicle door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to the height information of the rotatable spraying mechanism, the distance information between the rotatable spraying mechanism and the vehicle and the height information of the door handle;
the rotatable spraying mechanism is used for adjusting a spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism;
the rotatable spraying mechanism comprises a spraying control circuit, a spraying rotary driving mechanism, a transmission mechanism and a spraying pipeline, wherein the spraying control circuit is connected with the spraying rotary driving mechanism and is used for controlling the spraying rotary driving mechanism to act; the spraying rotary driving mechanism is connected with the transmission mechanism, the transmission mechanism is connected with the spraying pipeline, and the spraying rotary driving mechanism can drive the spraying pipeline to rotate for a set angle through the transmission mechanism.
As an embodiment of the present invention, the temperature monitoring unit obtains a temperature difference Δ T according to temperature information of the charging gun acquired by the far-infrared camera at different time points; obtaining a time difference delta t according to different time points; the temperature change per unit time is Δ T/Δ T.
According to another aspect of the invention, the following technical scheme is adopted: an active fire control method for a new energy vehicle, the active fire control method comprising:
acquiring temperature information of a set part of a vehicle in real time;
acquiring environmental temperature information;
acquiring set charging information of a charging gun;
setting calculation rules of corresponding normal threshold ranges or/and normal threshold ranges under different environmental temperatures and different charging modes;
judging whether the temperature change of the set part of the vehicle is normal or not according to the temperature information of the set part of the vehicle and the set charging information which are acquired in real time; and if the temperature data of the set part of the vehicle in the set charging mode exceeds the set normal threshold range at the corresponding environment temperature or/and the temperature change in the set time interval exceeds the set normal threshold range at the corresponding environment temperature, judging that the charging is abnormal.
As an embodiment of the present invention, the active fire fighting control method further includes:
establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining and abstracting layer by layer to generate high-level characteristics for helping far infrared camera shooting to identify temperature change;
when the network is calculated in the forward direction, a plurality of convolution cores carry out convolution operation on input at a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input;
in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially and alternately stacked and then reach a network to be output through the full connection layer, so that the whole fire fighting system can actively learn, and the robustness and the accuracy of the whole active fire fighting system are improved.
As an embodiment of the present invention, the active fire fighting control method further includes:
the second camera shooting mechanism is arranged towards the set parking space to acquire image information in the direction of the set parking space;
obtaining distance information between a vehicle parked in a set parking space and a distance sensor through the distance sensor;
acquiring the height information of the door handle according to the height information of the second camera mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera mechanism;
acquiring position information of a vehicle door handle and an inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to height information of the rotatable spraying mechanism, distance information of the rotatable spraying mechanism and a vehicle and height information of the door handle;
the rotatable spraying mechanism adjusts the spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism.
As an embodiment of the present invention, the active fire fighting control method includes:
monitoring temperature information of the charging gun acquired by the first far infrared camera in real time and set charging information acquired by the charging information acquisition unit to judge temperature change of the charging gun; judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit; if the temperature change of the charging gun in the set charging mode within the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
monitoring temperature information of a carriage set area acquired by a second far infrared camera in real time; judging whether the temperature data or/and the temperature change of a carriage set area is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of the set area of the carriage exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight against fire;
monitoring temperature information of the vehicle chassis acquired by the third far infrared camera in real time; judging whether the temperature data or/and the temperature change of a vehicle chassis is normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the manner of setting the normal threshold S includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is the charging current, R is the charging muzzle resistance, and Δ t is the dynamic recording time.
The invention has the beneficial effects that: according to the active fire fighting system and the fire fighting control method for the new energy vehicle, the charging process is cut off when the new energy vehicle is abnormally charged, the charging safety is improved, and fire caused by abnormal charging is avoided.
In a use scene of the active fire fighting system, the environment temperature information of the new energy automobile in the charging process, the temperature information of the charging pile and the automobile body temperature information of the new energy automobile can be monitored in real time, real-time temperature change analysis is carried out through a temperature rise algorithm model, a fire which is possibly caused at any time is judged and early warning is carried out, the fire danger caused by abnormal charging of the new energy automobile is blocked, the whole system can be continuously optimized through a deeply learned network model, and the robustness and the accuracy of the whole active fire fighting system are improved.
Drawings
Fig. 1 is a schematic composition diagram of an active fire protection system of a new energy vehicle according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a central control module according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a rotatable spraying mechanism according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a rotatable spraying mechanism according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a height adjusting mechanism according to an embodiment of the invention.
Fig. 6 is a schematic view of a usage scenario of the active fire fighting system of the new energy vehicle according to an embodiment of the invention.
Fig. 7 is a flowchart of an active fire control method for a new energy vehicle according to an embodiment of the present invention.
FIG. 8 is a schematic diagram of the distribution of the vehicle temperature acquisition modules according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The description in this section is for several exemplary embodiments only, and the present invention is not limited only to the scope of the embodiments described. It is within the scope of the present disclosure and claims to replace some of the features of the prior art with others that are the same or similar.
The steps in the embodiments in the specification are only expressed for convenience of description, and the implementation manner of the present application is not limited by the order of implementation of the steps. The term "connected" in the specification includes both direct connection and indirect connection.
Article 2.3 in New energy vehicle Specification "New energy electric vehicle fire safety technical Specification management System" includes regulations on fire safety
2.3.1 fire Pre-warning
(1) The rechargeable energy storage system has a fire detection automatic alarm function, and provides sound or light alarm signals for a driver in a driving area (the automatic detection and early warning of smoke, temperature, gas and the like before fire is recommended to be considered);
(2) pure electric motor coach and plug-in hybrid electric motor coach with the car length more than or equal to 6m can detect the internal working state of a power battery box body and give an alarm when abnormal conditions are found, and the outside of the battery box can not be ignited and exploded within 5min after the alarm.
2.3.2 fire isolation
The chargeable energy storage system (or the installation cabin) and the passenger cabin are isolated by using a flame-retardant heat-insulating material, the combustion performance of the flame-retardant heat-insulating material meets the A-grade requirement specified in GB 8624, and the heat conductivity coefficient is less than or equal to 0.04W/(m.K) at 300 ℃ by testing according to GB/T10294.
2.3.3 flame retardant design
The flame retardant requirement of the materials of parts in the rechargeable energy storage system is as follows: except for the storage battery unit, other non-metallic parts in the rechargeable energy storage system are subjected to flame retardant test of the parts in the rechargeable energy storage system according to a test method specified by 5.3.2, and the following flame retardant requirements are met
a) The material of the parts meeting any one of the following conditions needs to meet the requirements of HB level of horizontal combustion and V-0 level of vertical combustion:
-individual part weight >50 g;
-total weight of parts of same type within a single rechargeable energy storage system >200 g.
b) The material of other non-metal parts needs to meet the requirements of HB75 level of horizontal combustion and V-2 level of vertical combustion.
Therefore, the key time for avoiding the combustion of the new energy vehicle is within 5 minutes when the new energy vehicle has a dangerous condition, and how to identify the charging abnormity of the new energy vehicle within 5 minutes is very important.
The invention discloses an active fire fighting system of a new energy vehicle, wherein fig. 1 is a schematic composition diagram of the active fire fighting system of the new energy vehicle in an embodiment of the invention, fig. 2 is a schematic composition diagram of a central control module in an embodiment of the invention, and fig. 6 is a schematic usage scenario diagram of the active fire fighting system of the new energy vehicle in an embodiment of the invention; referring to fig. 1, 2 and 6, the active fire fighting system for new energy vehicles includes: the system comprises a central control module 1, a vehicle temperature acquisition module 2, an environment temperature acquisition module 3 and a charging pile power-off control circuit 4; fill electric pile outage control circuit 4 and can set up in filling electric pile 8.
The central control module 1 includes a charging information acquisition unit 11, a threshold setting unit 12, and an abnormality determination unit 13.
The vehicle temperature acquisition module 2 is arranged towards a set direction and used for acquiring temperature information of a set part of a vehicle on a parking space; the ambient temperature obtaining module 3 is used for obtaining ambient temperature information.
The charging information acquiring unit 11 is configured to acquire set charging information of a charging gun; the threshold setting unit 12 is configured to set corresponding normal threshold ranges under different ambient temperatures and different charging modes, or/and the threshold setting unit 12 is configured to set a calculation rule of the normal threshold ranges.
The abnormality determining unit 13 is configured to determine whether the temperature or/and the temperature change of the vehicle setting portion is normal according to the temperature information of the vehicle setting portion obtained by the vehicle temperature obtaining module 2 in real time and the set charging information obtained by the charging information obtaining unit; and judging that the charging is abnormal if the temperature of the vehicle setting part in the set charging mode exceeds the corresponding normal threshold range, or/and if the temperature change of the vehicle setting part in the set time interval exceeds the set normal threshold range at the corresponding environment temperature.
In an embodiment of the present invention, the abnormality determining unit 13 obtains a temperature difference Δ T according to temperature information of the charging gun acquired by the far-infrared camera 2 at different time points; obtaining a time difference delta t according to different time points; the temperature change per unit time is Δ T/Δ T.
The charging pile power-off control circuit 4 is used for receiving the control signal sent by the central control module and controlling the charging pile to be powered off.
FIG. 8 is a schematic diagram of the distribution of vehicle temperature acquisition modules in an embodiment of the present invention; referring to fig. 8, in a usage scenario of the present invention, the vehicle temperature obtaining module 2 includes a plurality of far infrared cameras. The first far infrared camera 21 is arranged towards the direction of the charging gun and used for acquiring temperature information of the charging gun in real time; the second far infrared camera 22 is arranged towards the vehicle compartment and used for acquiring the temperature information of the set area of the vehicle compartment in real time; the third far infrared camera 23 is disposed toward the vehicle chassis (may be disposed in a parking lock) to obtain temperature information of a set area of the vehicle chassis in real time. The vehicle temperature acquisition module 2 may also include one or any of the above-mentioned far infrared cameras. Of course, the vehicle temperature obtaining module 2 may also be other temperature obtaining devices, such as a temperature sensor.
A vehicle compartment (disposed in a front compartment or a rear compartment) is usually provided with a cooling system (including a cooler, an evaporator, an electric air conditioning compressor, a circulation circuit, a refrigerant medium, and the like), and whether the vehicle is charged abnormally or not can be identified by observing the temperature change of a corresponding position of a setting component (such as the electric air conditioning compressor) of the cooling system. The second far infrared camera 22 may be used to complete temperature acquisition for the corresponding vehicle location.
In one embodiment, the model and parking mode of the vehicle can be obtained through image recognition (such as image comparison), so that the position of each important observation area of the corresponding vehicle is obtained, and the temperature information of the corresponding position is obtained by the far infrared camera. Of course, the covered area of the far infrared camera is wider, and the temperature of a plurality of areas can be obtained through one far infrared camera (or one far infrared camera can be arranged in each key observation area).
The central control module 1 may further include a temperature monitoring unit (the temperature monitoring unit may also be a part of the abnormality determination unit, or may exist independently).
The temperature monitoring unit is used for monitoring the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit to judge the temperature change of the charging gun. The abnormality determining unit 13 is configured to determine whether the temperature change of the charging gun is normal according to the temperature information of the charging gun obtained by the first far-infrared camera 21 in real time and the set charging information obtained by the charging information obtaining unit; if the temperature change of the charging gun in the set time interval under the set charging mode exceeds the set normal threshold range under the corresponding environment temperature, the charging abnormality is judged, and the charging pile power-off control circuit controls the charging pile to stop charging so as to request the fire-fighting component to fight fire.
In one embodiment, the normal working temperature threshold range of the charging gun area is set to be 60-90 ℃; if the corresponding temperature is exceeded (which can be set to 90 ℃ C., if yes), it is judged to be abnormal. It is also possible to set: if the temperature exceeds 60 ℃ (or other temperature values), a yellow early warning is sent out, and the subsequent temperature change acceleration (temperature change amount in unit time) is observed; if the temperature variation acceleration does not exceed the set normal threshold range under the corresponding environment temperature condition, continuing to charge, and if the temperature variation acceleration exceeds the set normal threshold range, controlling the charging pile to stop charging by the charging pile power-off control circuit. And if the temperature of the charging gun area exceeds 90 ℃, starting the fire fighting device to act. For example, if the time required for the temperature of the charging gun region to increase from 60 ℃ to 70 ℃ is 3 minutes (the temperature acceleration is about 3.3 ℃/min) and the time required for monitoring the temperature of the charging gun region of the vehicle to increase from 60 ℃ to 70 ℃ is 2 minutes (the temperature acceleration is 5 ℃/min) at the corresponding ambient temperature, the charging may be stopped.
The temperature monitoring unit is used for monitoring the temperature information of the carriage set area acquired by the second far infrared camera in real time. The abnormality judgment unit 13 is configured to judge whether temperature data or/and temperature change of a car setting area is normal during charging of the vehicle; if the temperature data or/and the temperature change of the set area of the carriage exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire.
The temperature monitoring unit is used for monitoring the temperature information of the vehicle chassis acquired by the third far infrared camera in real time. The abnormality judgment unit 13 is used for judging whether the temperature data or/and the temperature change of the vehicle chassis is normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change of the vehicle in different areas of the vehicle chassis exceeds the range of the set normal threshold value in the charging process of the vehicle, the charging is judged to be abnormal, the charging pile power-off control circuit controls the charging pile to stop charging, and a fire-fighting part is requested to fight fire.
The manner in which the threshold setting unit 12 sets the normal threshold S includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging muzzle material (generally copper core material), and m is the mass of the set part material (such as copper) of the charging gun; i is charging current, R is charging muzzle resistance, and Deltat is dynamic recordTime. Since the tip of the charging gun is usually made of copper, the specific heat capacity of copper is 0.39 x 10 3 J/(kg·℃)。
In an embodiment of the present invention, the central control module 1 further includes a temperature-rising neural network learning model 14, and the temperature-rising neural network learning model 14 is combined with the threshold setting unit to comprehensively set the normal threshold range or/and the calculation rule thereof. In the temperature rise neural network learning model 14, a temperature rise perception deep learning model is established by a convolutional neural network, local features of input temperature change data are extracted, and high-level features are generated by layer-by-layer combination and abstraction and are used for helping far infrared camera shooting to identify temperature changes. During network forward calculation, a plurality of convolution kernels carry out convolution operation on input in a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input. In the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially and alternately stacked and then reach the network output through the full-connection layer to be supplied to the whole fire fighting system for active learning, so that the robustness and the accuracy of the whole active fire fighting system are improved.
In addition, the temperature-rise neural network learning model 14 can acquire the model of the corresponding vehicle by acquiring images of different vehicles, so as to acquire the positions of vehicle setting components (such as a charging interface and an electric air conditioner compressor).
In an embodiment of the present invention, the active fire fighting system further comprises a second camera 5, a distance sensor 6, a rotatable spraying mechanism 7; the central control module 1 also comprises a visual height locating unit 15 and a door handle position analysis unit 16.
The second camera mechanism 5 is arranged towards a set parking space and used for acquiring image information in the direction of the set parking space; the distance sensor 6 is used for acquiring distance information between a vehicle set to be parked in a parking space and the distance sensor.
The visual height positioning unit 15 is used for acquiring the height information of the door handle according to the height information of the second camera shooting mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera shooting mechanism.
The door handle position analysis unit 16 is configured to obtain position information of a vehicle door handle and an inclination angle of a connection line between the vehicle door handle and the rotatable spraying mechanism according to the height information of the rotatable spraying mechanism, the distance information between the rotatable spraying mechanism and the vehicle, and the height information of the door handle.
The rotatable spraying mechanism 7 is used for adjusting a spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism.
Since the vehicle battery is mostly disposed at the bottom of the vehicle and the charging port is at the waist, the present invention selects the handle height dimension as the reference height for fire protection.
Fig. 3 and 4 are schematic structural views of a rotatable spraying mechanism according to an embodiment of the present invention; referring to fig. 3 and 4, in an embodiment of the present invention, the rotatable spraying mechanism 7 includes a spraying control circuit 71, a spraying rotation driving mechanism 72, a transmission mechanism 73 and a spraying pipeline 74, wherein the spraying control circuit 71 is connected to the spraying rotation driving mechanism 72 for controlling the spraying rotation driving mechanism 72 to operate; the spraying rotary driving mechanism 72 is connected with the transmission mechanism 73, the transmission mechanism 73 is connected with the spraying pipeline 74, and the spraying rotary driving mechanism 72 can drive the spraying pipeline 74 to rotate for a set angle through the transmission mechanism 73.
Furthermore, in an embodiment of the present invention, the rotatable spraying mechanism 7 may further include a height adjusting mechanism 9. FIG. 5 is a schematic structural diagram of a height adjustment mechanism according to an embodiment of the present invention; referring to fig. 5, in an embodiment, the spraying pipeline 74 is disposed on a bracket 95; and two ends of the spraying pipeline are respectively connected with the main pipeline through flexible pipelines. The height adjusting mechanism 9 comprises a height adjusting driving mechanism 91 and a height adjusting transmission mechanism 92, and the height adjusting transmission mechanism 92 is connected with the spraying pipeline 94; the height adjustment driving mechanism 91 adjusts the height of the spray pipe 94 through a height adjustment transmission mechanism 92.
In an embodiment of the present invention, the height adjustment driving mechanism 91 is a driving motor; the height adjusting transmission mechanism 92 comprises a screw 921 and a slider 922, and the output shaft of the driving motor is connected with the screw 921. Slider 922 nests in lead screw 921, slider 922 is equipped with lead screw 921 complex internal thread, slider 922 with support 95 is fixed to be set up. In addition, the height adjusting mechanism 9 may further include a cylinder 93, a slide way 94 is disposed on one side of the cylinder 93, and the sliding block 922 is provided with a second sliding block 923 capable of sliding along the slide way 94; when the driving motor drives the screw 921 to move, due to the limitation of the slideway 94 on the second slider 923, the slider 922 can only slide up and down along the direction of the slideway 94; thereby driving the bracket 95 to move up and down and further driving the rotatable spraying mechanism 5 to move up and down.
The invention further discloses an active fire control method for a new energy vehicle, and fig. 7 is a flowchart of the active fire control method for the new energy vehicle in an embodiment of the invention; referring to fig. 7, the active fire fighting control method includes:
step S1, acquiring the temperature information of the set position of the vehicle in real time;
step S2, acquiring environment temperature information;
step S3, acquiring set charging information of the charging gun;
step S4, setting calculation rules for normal threshold ranges or/and normal threshold ranges corresponding to different ambient temperatures and different charging modes;
step S5, judging whether the temperature change of the set position of the vehicle is normal or not according to the temperature information of the set position of the vehicle and the set charging information which are acquired in real time; and if the temperature data of the set part of the vehicle in the set charging mode exceeds the set normal threshold range at the corresponding ambient temperature or/and the temperature change in the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to cut off the power. In one embodiment, the temperature difference Δ T is obtained according to the temperature information of the charging gun acquired by the far-infrared camera 2 at different time points; obtaining a time difference delta t according to different time points; the temperature change per unit time is Δ T/Δ T. In addition, different thresholds can be set according to the charging mode and the ambient temperature.
In an embodiment of the present invention, the active fire fighting control method further includes: a temperature rise perception deep learning model step, wherein the abnormal characteristic of temperature change is learned through the accumulated data; the method specifically comprises the following steps:
establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining and abstracting layer by layer to generate high-level characteristics for helping far infrared camera shooting to identify temperature change;
when the network is calculated in the forward direction, a plurality of convolution cores carry out convolution operation on input at a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input;
in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially and alternately stacked and then reach the network output through the full-connection layer to be supplied to the whole fire fighting system for active learning, so that the robustness and the accuracy of the whole active fire fighting system are improved.
The self-learning function is mainly used for each vehicle charged in the past, the charging protocol and rule (such as charging rate and power) of each vehicle and the vehicle type of each vehicle are known through the neural network, and data acquisition and reasonable interaction between the external vehicle and the vehicle through quick charging and slow charging can be achieved. When the vehicle is in danger of overhigh temperature in the self-adaptive charging process, the field end is informed to carry out active fire fighting.
In an embodiment of the present invention, the active fire fighting control method further includes: rotatable mechanism rotation regulation step that sprays specifically includes:
the second camera shooting mechanism is arranged towards the set parking space to acquire image information in the direction of the set parking space;
obtaining distance information between a vehicle parked in a set parking space and a distance sensor through the distance sensor;
acquiring the height information of the door handle according to the height information of the second camera mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera mechanism;
acquiring position information of a vehicle door handle and an inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to height information of the rotatable spraying mechanism, distance information of the rotatable spraying mechanism and a vehicle and height information of the door handle;
the rotatable spraying mechanism adjusts the spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism.
In one use scene, the active fire fighting device for the new energy vehicle charging pile comprises a far infrared camera with a temperature rise algorithm module, a central control system, a charging pile with a temperature rise induction module and a temperature rise neural network learning model; the far infrared camera with the temperature rise algorithm module, the charging pile with the temperature rise induction module and the temperature rise neural network learning model are all connected with the central control system; the temperature change of the charging pile and the new energy automobile rising per unit time in the charging process is monitored in real time through far infrared camera shooting, and the temperature change is compared with a threshold value set in a central control system in real time. And if the new energy automobile is not beyond the set threshold, continuing to monitor in real time until the new energy automobile is charged, and if the new energy automobile is beyond the set threshold, sending an alarm signal to the central control system, transmitting the alarm signal to the charging pile and the spraying system, and powering off and spraying and cooling the new energy automobile.
The temperature rise monitored by far infrared camera shooting of the new energy automobile in the charging process is different for the change of a direct current charging working scene and an alternating current charging working scene, after the environment temperature is set by the central control system, in the charging process of the new energy automobile in the environment, the environment temperature is subtracted from the regional temperature collected by the far infrared camera shooting, the regional temperature is divided by the unit time of the temperature rising to obtain the temperature rise rate, and the temperature rise rate is compared with the normal set temperature rise rate.
In a usage scenario of the present invention, the active fire fighting control method includes:
monitoring temperature information of the charging gun acquired by the first far infrared camera in real time and set charging information acquired by the charging information acquisition unit to judge temperature change of the charging gun; judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit; if the temperature change of the charging gun in the set charging mode within the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
monitoring temperature information of a carriage set area acquired by a second far infrared camera in real time; judging whether temperature data or/and temperature change of a carriage set area is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of a set area of a carriage exceeds a set normal threshold range at the corresponding environmental temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
monitoring temperature information of the vehicle chassis acquired by the third far infrared camera in real time; judging whether the temperature data or/and the temperature change of a vehicle chassis is normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the manner of setting the normal threshold S includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current working in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is the charging current, R is the charging muzzle resistance, and Δ t is the dynamic recording time.
In summary, the active fire fighting system and the fire fighting control method for the new energy vehicle provided by the invention can cut off the charging process when the new energy vehicle is abnormally charged, improve the charging safety and avoid the fire caused by abnormal charging.
In one use scene of the active fire fighting system, the environment temperature information of the new energy automobile in the charging process, the temperature information of the charging pile and the body temperature information of the new energy automobile can be monitored in real time, real-time temperature change analysis is carried out through a temperature rise algorithm model, a fire which possibly happens at any time is judged and early warning is carried out, the fire danger caused by abnormal charging of the new energy automobile is blocked, the whole system can be continuously optimized through a deeply learned network model, and the robustness and the accuracy of the whole active fire fighting system are improved.
It should be noted that the present application may be implemented in software and/or a combination of software and hardware; for example, it may be implemented using Application Specific Integrated Circuits (ASICs), general purpose computers, or any other similar hardware devices. In some embodiments, the software programs of the present application may be executed by a processor to implement the above steps or functions. As such, the software programs (including associated data structures) of the present application can be stored in a computer-readable recording medium; such as RAM memory, magnetic or optical drives or diskettes, and the like. In addition, some steps or functions of the present application may be implemented using hardware; for example, as circuitry that cooperates with the processor to perform various steps or functions.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Effects or advantages referred to in the embodiments may not be reflected in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.

Claims (10)

1. The active fire fighting system for the new energy vehicle is characterized by comprising: the charging system comprises a central control module, a vehicle temperature acquisition module, an ambient temperature acquisition module, a charging mode switching module and a charging pile power-off control circuit;
the central control module comprises a charging information acquisition unit, a threshold setting unit, a temperature monitoring unit, an abnormality judgment unit and a temperature rise neural network learning model;
the vehicle temperature acquisition module comprises a plurality of far infrared cameras; the first far infrared camera is arranged towards the direction of the charging gun and used for acquiring temperature information of the charging gun in real time; the second far infrared camera is arranged towards the vehicle compartment and used for acquiring the temperature information of the set area of the vehicle compartment in real time; the third far infrared camera is arranged towards the vehicle chassis and used for acquiring the temperature information of a set area of the vehicle chassis in real time;
the environment temperature acquisition module is used for acquiring environment temperature information;
the charging information acquisition unit is used for acquiring set charging information of a charging gun;
the threshold setting unit is used for setting normal threshold ranges corresponding to different environment temperatures and vehicle setting areas in different charging modes or/and normal threshold variation ranges changing in unit time, or/and is used for setting calculation rules of the normal threshold ranges/normal threshold variation ranges;
the temperature monitoring unit is used for monitoring the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit to judge the temperature change of the charging gun; the abnormality judgment unit is used for judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit; if the temperature change of the charging gun in a set time interval in a set charging mode exceeds the set normal threshold value change range at the corresponding environment temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring temperature information of a carriage set area acquired by the second far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the set area of the carriage is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of a set area of a carriage exceeds a set normal threshold range at the corresponding environmental temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring the temperature information of the vehicle chassis acquired by the third far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the vehicle chassis are normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds a set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the temperature rise neural network learning model is combined with a threshold setting unit to comprehensively set a normal threshold range or/and a calculation rule thereof; the temperature rise neural network learning model is used for establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining layer by layer and abstracting to generate high-level characteristics for helping a far infrared camera to identify temperature change; when the network is calculated in the forward direction, a plurality of convolution cores carry out convolution operation on input at a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input; in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially subjected to cross stacking and then reach a network through the full-connection layer to be output for the active learning of the whole fire protection system, so that the robustness and the accuracy of the whole active fire protection system are improved;
the mode of setting the normal threshold S by the threshold setting unit includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is charging current, R is charging muzzle resistance, and delta t is dynamic recording time;
the charging pile power-off control circuit is used for receiving the control signal sent by the central control module and controlling the charging pile to be powered off;
the active fire fighting system further comprises a second camera shooting mechanism, a distance sensor and a rotatable spraying mechanism; the central control module also comprises a visual height positioning unit and a door handle position analysis unit;
the second camera shooting mechanism is arranged towards the set parking space and used for acquiring image information in the direction of the set parking space;
the distance sensor is used for acquiring distance information between a vehicle parked in a set parking space and the distance sensor;
the visual height positioning unit is used for acquiring the height information of the door handle according to the height information of the second camera shooting mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera shooting mechanism;
the door handle position analysis unit is used for acquiring the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to the height information of the rotatable spraying mechanism, the distance information between the rotatable spraying mechanism and the vehicle and the height information of the door handle;
the rotatable spraying mechanism is used for adjusting a spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism;
the rotatable spraying mechanism comprises a spraying control circuit, a spraying rotary driving mechanism, a transmission mechanism and a spraying pipeline, wherein the spraying control circuit is connected with the spraying rotary driving mechanism and is used for controlling the spraying rotary driving mechanism to act; the spraying rotary driving mechanism is connected with the transmission mechanism, the transmission mechanism is connected with the spraying pipeline, and the spraying rotary driving mechanism can drive the spraying pipeline to rotate for a set angle through the transmission mechanism.
2. An active fire fighting system for a new energy vehicle, the active fire fighting system for a new energy vehicle comprising: the charging pile power-off control system comprises a central control module, a vehicle temperature acquisition module, an environment temperature acquisition module and a charging pile power-off control circuit;
the central control module comprises a charging information acquisition unit, a threshold setting unit and an abnormality judgment unit;
the vehicle temperature acquisition module is arranged towards a set direction and used for acquiring temperature information of a set part of a vehicle on a parking space;
the environment temperature acquisition module is used for acquiring environment temperature information;
the charging information acquisition unit is used for acquiring set charging information of the charging gun;
the threshold setting unit is used for setting corresponding normal threshold ranges under different environmental temperatures and different charging modes, or/and the threshold setting unit is used for setting calculation rules of the normal threshold ranges;
the abnormality judgment unit is used for judging whether the temperature or/and the temperature change of the vehicle setting part is normal or not according to the temperature information of the vehicle setting part acquired by the vehicle temperature acquisition module and the set charging information acquired by the charging information acquisition unit; if the temperature of the vehicle setting part in the set charging mode exceeds the corresponding normal threshold range, or/and if the temperature change of the vehicle setting part in the set time interval exceeds the set normal threshold range at the corresponding environment temperature, judging that the charging is abnormal;
the charging pile power-off control circuit is used for receiving the control signal sent by the central control module and controlling the charging pile to be powered off.
3. The active fire fighting system for new energy vehicles of claim 2, characterized in that:
the vehicle temperature acquisition module comprises a first far infrared camera or/and a second far infrared camera or/and a third far infrared camera;
the first far infrared camera is arranged towards the direction of the charging gun and used for acquiring temperature information of the charging gun in real time; the second far infrared camera is arranged towards the vehicle compartment and used for acquiring the temperature information of the set area of the vehicle compartment in real time; the third far infrared camera is arranged towards the vehicle chassis and used for acquiring the temperature information of a set area of the vehicle chassis in real time;
the central control module comprises a temperature monitoring unit;
the temperature monitoring unit is used for monitoring the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit to judge the temperature change of the charging gun; the abnormality judgment unit is used for judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit; if the temperature change of the charging gun in the set charging mode within the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring temperature information of a carriage set area acquired by the second far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the set area of the carriage is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of a set area of a carriage exceeds a set normal threshold range at the corresponding environmental temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
the temperature monitoring unit is used for monitoring the temperature information of the vehicle chassis acquired by the third far infrared camera in real time; the abnormality judgment unit is used for judging whether the temperature data or/and the temperature change of the vehicle chassis are normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the mode of setting the normal threshold S by the threshold setting unit includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is the charging current, R is the charging muzzle resistance, and Δ t is the dynamic recording time.
4. The active fire fighting system for new energy vehicles of claim 2, characterized in that:
the central control module comprises a temperature rise neural network learning model, and the temperature rise neural network learning model is combined with a threshold setting unit to comprehensively set a normal threshold range or/and a calculation rule thereof;
the temperature rise neural network learning model is used for establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining layer by layer and abstracting to generate high-level characteristics for helping a far infrared camera to identify temperature change;
when the network is calculated in the forward direction, a plurality of convolution cores carry out convolution operation on input at a convolution layer to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input;
in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially and alternately stacked and then reach the network output through the full-connection layer to be supplied to the whole fire fighting system for active learning, so that the robustness and the accuracy of the whole active fire fighting system are improved.
5. The active fire fighting system for new energy vehicles of claim 2, characterized in that:
the active fire fighting system further comprises a second camera shooting mechanism, a distance sensor and a rotatable spraying mechanism; the central control module also comprises a visual height positioning unit and a door handle position analysis unit;
the second camera shooting mechanism is arranged towards the set parking space and used for acquiring image information in the direction of the set parking space;
the distance sensor is used for acquiring distance information between a vehicle parked at a set parking space and the distance sensor;
the visual height positioning unit is used for acquiring the height information of the door handle according to the height information of the second camera shooting mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera shooting mechanism;
the door handle position analysis unit is used for acquiring the position information of the vehicle door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to the height information of the rotatable spraying mechanism, the distance information between the rotatable spraying mechanism and the vehicle and the height information of the door handle;
the rotatable spraying mechanism is used for adjusting a spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism;
the rotatable spraying mechanism comprises a spraying control circuit, a spraying rotary driving mechanism, a transmission mechanism and a spraying pipeline, wherein the spraying control circuit is connected with the spraying rotary driving mechanism and is used for controlling the spraying rotary driving mechanism to act; the spraying rotary driving mechanism is connected with the transmission mechanism, the transmission mechanism is connected with the spraying pipeline, and the spraying rotary driving mechanism can drive the spraying pipeline to rotate for a set angle through the transmission mechanism.
6. The active fire fighting system for new energy vehicles of claim 2, characterized in that:
the temperature monitoring unit obtains a temperature difference delta T according to temperature information of the charging gun acquired by the far infrared camera at different time points; obtaining a time difference delta t according to different time points; the temperature change per unit time is Δ T/Δ T.
7. An active fire control method for a new energy vehicle is characterized by comprising the following steps:
acquiring temperature information of a set part of a vehicle in real time;
acquiring environmental temperature information;
acquiring set charging information of a charging gun;
setting calculation rules of corresponding normal threshold ranges or/and normal threshold ranges under different environmental temperatures and different charging modes;
judging whether the temperature change of the set part of the vehicle is normal or not according to the temperature information of the set part of the vehicle and the set charging information which are acquired in real time; and if the temperature data of the set part of the vehicle in the set charging mode exceeds the set normal threshold range at the corresponding environment temperature or/and the temperature change in the set time interval exceeds the set normal threshold range at the corresponding environment temperature, judging that the charging is abnormal.
8. The active fire control method for the new energy vehicle as claimed in claim 8, wherein:
the active fire control method further comprises:
establishing a temperature rise perception deep learning model by a convolutional neural network, extracting local characteristics of input temperature change data, combining and abstracting layer by layer to generate high-level characteristics for helping far infrared camera shooting to identify temperature change;
when the network is calculated in the forward direction, at the convolution layer, a plurality of convolution cores carry out convolution operation on input to generate a plurality of feature maps, and the dimension of each feature map is reduced relative to the dimension of the input;
in the secondary sampling layer, each characteristic graph is subjected to pooling to obtain a corresponding graph with further reduced dimensionality, and the corresponding graphs are sequentially and alternately stacked and then reach the network output through the full-connection layer to be supplied to the whole fire fighting system for active learning, so that the robustness and the accuracy of the whole active fire fighting system are improved.
9. The active fire control method for the new energy vehicle as claimed in claim 8, wherein:
the active fire control method further comprises:
the second camera shooting mechanism is arranged towards the set parking space to acquire image information in the direction of the set parking space;
obtaining distance information between a vehicle parked in a set parking space and a distance sensor through the distance sensor;
acquiring the height information of the door handle according to the height information of the second camera mechanism, the distance information between the distance sensor and the vehicle and the position of the door handle in the image information shot by the second camera mechanism;
acquiring position information of a vehicle door handle and an inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism according to height information of the rotatable spraying mechanism, distance information of the rotatable spraying mechanism and a vehicle and height information of the door handle;
the rotatable spraying mechanism adjusts the spraying angle according to the parking distance information of the vehicle, the position information of the door handle and the inclination angle of a connecting line between the vehicle door handle and the rotatable spraying mechanism.
10. The active fire control method for the new energy vehicle as claimed in claim 8, wherein:
the active fire fighting control method comprises the following steps:
monitoring temperature information of the charging gun acquired by the first far infrared camera in real time and set charging information acquired by the charging information acquisition unit to judge temperature change of the charging gun; judging whether the temperature change of the charging gun is normal or not according to the temperature information of the charging gun acquired by the first far infrared camera in real time and the set charging information acquired by the charging information acquisition unit; if the temperature change of the charging gun in the set charging mode within the set time interval exceeds the set normal threshold range at the corresponding ambient temperature, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
monitoring temperature information of a carriage set area acquired by a second far infrared camera in real time; judging whether temperature data or/and temperature change of a carriage set area is normal or not in the charging process of the vehicle; if the temperature data or/and the temperature change of a set area of a carriage exceeds a set normal threshold range at the corresponding environmental temperature in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting part to fight fire;
monitoring temperature information of the vehicle chassis acquired by the third far infrared camera in real time; judging whether the temperature data or/and the temperature change of a vehicle chassis is normal or not in the charging process of the vehicle; if the temperature data of the vehicle chassis exceeds the set normal threshold range at the corresponding environment temperature in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference between different areas of a vehicle chassis exceeds a set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and switching the charging mode by the charging mode switching module; if the temperature difference or/and the temperature change between different areas of the vehicle chassis exceeds the set normal threshold range in the charging process of the vehicle, judging that the charging is abnormal, and controlling the charging pile to stop charging by the charging pile power-off control circuit to request a fire-fighting component to fight fire;
the method for setting the normal threshold S includes:
S＝△T*β/△t；
△T＝Q/(cm)＝w/(cm)；
w＝I 2 R△t；
wherein, the delta T is the temperature change of the charging muzzle in normal working unit time; q is heat generated in the charging process, and w is current acting in the charging process; c is the specific heat capacity of the charging gun mouth material, and m is the mass of the set part of the material of the charging gun; i is the charging current, R is the charging muzzle resistance, and Δ t is the dynamic recording time.
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