CN112298007B - Laser safety protection system and method and vehicle - Google Patents
Laser safety protection system and method and vehicle Download PDFInfo
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- CN112298007B CN112298007B CN202011135228.3A CN202011135228A CN112298007B CN 112298007 B CN112298007 B CN 112298007B CN 202011135228 A CN202011135228 A CN 202011135228A CN 112298007 B CN112298007 B CN 112298007B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/40—Indexing codes relating to other road users or special conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/50—Projected symbol or information, e.g. onto the road or car body
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Abstract
The invention relates to a vehicle safety deviceThe full protection system comprises a sensing module, an information acquisition module, a control module and a laser projection module; the sensing module is used for detecting barrier information; the control module is suitable for judging whether barriers exist around the vehicle according to the barrier information, and if not, the laser projection module is maintained in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, maintaining the laser projection module in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If yes, the laser projection module is closed; if not, the laser projection module is maintained in an open state. The invention also discloses a vehicle safety protection method and a vehicle. The vehicle safety protection system can effectively prevent the laser in the laser projection module from projecting to an obstacle with a low burning point to cause a burning risk, and improves the driving safety.
Description
Technical Field
The invention relates to vehicle safety protection, in particular to a laser safety protection system. In addition, the invention also relates to a laser safety protection method and a vehicle.
Background
Nowadays, more and more middle and high-end automobiles are equipped with laser projection devices. The laser projection device can be used in a vehicle and also can be used outside the vehicle. Laser projection devices used in vehicles are generally used as head-up displays or atmosphere lamps, and the laser light source power is generally low, so that no obvious risk exists even if a fault occurs. In order to achieve the aim of eye-catching display under the condition of ambient light, the laser projection equipment used outside the vehicle generally has the luminous power of a laser light source reaching several watts or dozens of watts; if it is for illumination, the light emitting power of the laser light source may even reach tens or hundreds of watts. Once a safety accident occurs, it may pose a great threat to the objects in the surrounding environment.
Due to the high power of the laser light source used for illumination, for example, when the laser light source irradiates flammable and explosive objects, such as oil tanks, waste paper, deadwood, fur, plastic bags and the like of vehicles running around, the flammable and explosive objects can be burnt or exploded by the laser energy, once the flammable and explosive objects are burnt or exploded, the safety of surrounding personnel, buildings and running vehicles can be affected, even interlinking accidents can occur, and the influence is great.
Disclosure of Invention
The invention aims to solve the technical problem of providing a laser safety protection system, which can effectively prevent the burning risk caused by the fact that laser in a laser projection module is projected to an obstacle with a low burning point, reduce the damage to personnel in and around a vehicle and improve the driving safety.
The invention provides a laser safety protection method, which can effectively prevent the burning risk caused by the projection of the laser in the laser projection module to an obstacle with a low burning point, reduce the damage to the personnel in and around the vehicle and improve the driving safety.
The invention provides a vehicle, and the laser safety protection system of the vehicle can effectively prevent the burning risk caused by the laser in the laser projection module projecting to the obstacle with low burning point, reduce the harm to the personnel in and around the vehicle, and improve the driving safety.
In order to solve the above technical problems, a first aspect of the present invention provides a laser safety protection system, which includes a sensing module, an information collecting module, a control module, and a laser projection module;
the laser projection module is used for forming a laser pattern and projecting the laser pattern onto the ground;
the sensing module is used for detecting whether an obstacle exists around a vehicle, the distance between the obstacle and the vehicle and the temperature of the obstacle;
the information acquisition module is suitable for acquiring the obstacle information detected by the sensing module;
the control module is suitable for judging whether obstacles exist around the vehicle according to the obstacle information, and if not, the laser projection module is maintained in an open state; if yes, judging whether the distance L between the barrier and the vehicle is larger than a preset distance L or not0(ii) a If so, maintaining the laser projection module in an open state; if not, judging the temperature of the obstacleWhether T is greater than a preset temperature T0(ii) a If yes, the laser projection module is closed; if not, the laser projection module is maintained in an open state.
Preferably, the left side area and the right side area of the vehicle have at least two divisions in the front-rear direction, respectively; the sensing module is further used for sensing the subarea of the obstacle on the left side or the right side of the vehicle; the control module is suitable for controlling whether the laser projection module projects in the partition where the obstacle is located.
Further preferably, the sensing module comprises a plurality of infrared sensors for detecting the temperature of the obstacle and a plurality of range radars for detecting the distance L between the vehicle and the obstacle, and the range radars are dispersedly arranged on the body of the vehicle so that the range radars can respectively detect the distance between the obstacle and the vehicle in different zones; the infrared sensors are dispersedly arranged on the left side and the right side of the vehicle body so as to be capable of detecting the temperature information of the obstacles on the left side and the right side of the vehicle body;
the signal output ends of the infrared sensor and the ranging radar are connected to the signal input end of the information acquisition module;
the control module is suitable for controlling whether the laser projection module projects in the partition where the obstacle is located or not according to the distance measured by each ranging radar.
Typically, the control module is further adapted to determine whether the speed v of the vehicle is greater than a preset speed v according to the speed information detected by the speed measurement unit of the vehicle0(ii) a If so, maintaining the laser projection module in an open state; if not, judging whether obstacles exist around the vehicle or not.
Preferably, the control module is further adapted to calculate a temperature change gradient Δ T of the obstacle according to the temperature information of the obstacle, and determine whether the temperature change gradient Δ T is greater than a preset temperature change gradient Δ T0(ii) a If yes, the laser projection module is closed; if not, the laser projection module is maintained to be onAn on state.
Typically, the laser projection module includes a projection image display unit forming a laser pattern and a projection position adjustment unit adjusting a projection position of the laser pattern; the control module is electrically connected with the projection image display unit to control the opening and closing of the projection image display unit; the control module is electrically connected with the projection position adjusting unit to control the projection position of the laser pattern.
In a second aspect, the present invention provides a laser safety protection method, including the following steps:
(1) detecting information whether obstacles exist around a vehicle, distance information between the obstacles and the vehicle and temperature information of the obstacles, and acquiring the information of the obstacles;
(2) judging whether obstacles exist around the vehicle according to the obstacle information of the vehicle, and if not, maintaining the laser projection module in an open state; if yes, judging whether the distance L between the barrier and the vehicle is larger than a preset distance L or not0(ii) a If so, maintaining the laser projection module in an open state; if not, judging whether the temperature T of the barrier is greater than a preset temperature T or not0(ii) a If yes, the laser projection module is closed; if not, the laser projection module is maintained in an open state.
Preferably, the method further comprises: dividing a left side area and a right side area of the vehicle into at least two subareas along the front-back direction; detecting the subarea of the obstacle on the left side or the right side of the vehicle; and controlling whether the laser projection module projects in the partition where the obstacle is located.
Preferably, the method further comprises: judging whether the speed v of the vehicle is greater than a preset speed v or not according to the speed information detected by the vehicle0(ii) a If so, maintaining the laser projection module in an open state; if not, judging whether the distance between the obstacle and the vehicle is larger than a preset distance L or not according to the obstacle information.
Typically, according to the disorderCalculating the temperature change gradient delta T of the obstacle according to the temperature information of the obstacle, and judging whether the temperature change gradient delta T is larger than a preset temperature change gradient delta T or not0(ii) a If yes, the laser projection module is closed; if not, the laser projection module is maintained in an open state.
In a third aspect, the present invention provides a vehicle, which includes the laser safety protection system according to any one of the above first aspects and executes the laser safety protection method according to any one of the above second aspects.
Through the technical scheme, the laser safety protection system judges whether the laser projection module works or not by detecting whether an obstacle exists in the laser irradiation range or not and detecting the temperature of the obstacle in time, comparing the distance between the obstacle and a vehicle with the preset distance and comparing the temperature of the obstacle with the preset temperature, so that the phenomenon that the obstacle is burnt or exploded due to temperature increase after being irradiated by laser is prevented, the possible damage of laser irradiation to personnel in the vehicle or personnel outside the vehicle is reduced, and the driving safety is improved.
Further advantages of the present invention, as well as the technical effects of preferred embodiments, are further described in the following detailed description.
Drawings
FIG. 1 is a schematic block diagram of a first embodiment of a laser safety system of the present invention;
FIG. 2 is a flow chart of a first embodiment of the laser safety protection method of the present invention;
FIG. 3 is a flow chart of a second embodiment of the laser safety protection method of the present invention;
FIG. 4 is a schematic block diagram of a second embodiment of the laser safety system of the present invention;
FIG. 5 is a flow chart of a third embodiment of the laser safety protection method of the present invention;
FIG. 6 is a flow chart of a fourth embodiment of the laser safety protection method of the present invention;
FIG. 7 is a flow chart of a fifth embodiment of the laser safety protection method of the present invention;
FIG. 8 is a schematic illustration of a vehicle embodiment of the present invention.
Description of the reference numerals
1 perception module and 2 information acquisition module
3 control module 4 laser projection module
41 projection image display unit 42 projection position adjusting unit
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the description of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the terms "front" and "rear" refer to the direction in which the front end of the vehicle body refers and the direction in which the rear end of the vehicle body refers, respectively. "upper" and "lower" refer to the up-down direction when the vehicle is normally placed. "left" and "right" refer to the rear left-right direction as defined by "front", "rear", "upper" and "lower".
In a basic embodiment of the present invention, as shown in fig. 1 and fig. 2, the present invention provides a laser safety protection system, which includes a sensing module 1, an information collecting module 2, a control module 3, and a laser projection module 4; the laser projection module 4 is used for forming a laser pattern and projecting the laser pattern on the ground; the sensing module 1 is used for detecting whether an obstacle exists around the vehicle, the distance between the obstacle and the vehicle and the temperature of the obstacle; the information acquisition module 2 is suitable for acquiring the obstacle information detected by the sensing module 1(ii) a The control module 3 is suitable for judging whether obstacles exist around the vehicle according to the obstacle information, and if not, the laser projection module 4 is maintained in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If yes, the laser projection module 4 is closed; if not, the laser projection module 4 is maintained in the open state.
According to the invention, the signal output end of the sensing module 1 is connected with the signal input end of the information acquisition module 2 so as to be capable of transmitting the obstacle information detected by the sensing module 1 to the information acquisition module 2. The signal output end of the information acquisition module 2 is connected with the signal input end of the control module 3 so as to transmit the barrier information acquired by the information acquisition module 2 to the control module 3. The signal output end of the control module 3 is connected with the signal input end of the laser projection module 4 to control the work of the laser projection module 4.
According to the invention, the distance L between the obstacle and the vehicle can be the distance from the obstacle to any position of the vehicle body. However, in order to control the operation of the laser projection module 4 more accurately according to the distance between the obstacle and the vehicle, the distance L between the obstacle and the vehicle is preferably a perpendicular distance between the obstacle and the surface of the outer contour of the vehicle.
Specifically, the preset distance L0Is related to the range of projection of the laser projection module 4 around the vehicle, more specifically, the preset distance L0The distance from the periphery of the laser projection pattern projected by the laser projection module 4 on the ground around the vehicle to the vehicle may be. Here T0The temperature of the projection range is increased once the temperature of a certain point in the projection range is increased and exceeds T in the projection process0And immediately and forcibly closing the laser projection at the corresponding position, and restarting the projection at the position after the temperature is reduced to the ambient temperature.
In the invention, the sensing module 1 can sense the obstacle and can adopt a camera to shoot and detect or adopt ultrasonic detection. The sensing module 1 can sense the distance between the obstacle and the vehicle by using a conventional distance measuring technology, such as an ultrasonic distance measuring technology. The sensing module 1 can sense the temperature of the barrier and can adopt an infrared temperature measurement technology.
When the laser safety protection system provided by the above basic embodiment of the present invention works, the laser projection module 4 is installed on the vehicle, the sensing module 1 senses whether an obstacle exists around the vehicle, a distance between the obstacle and the vehicle, whether the obstacle is a person or an animal, and obstacle information such as a temperature of the obstacle, and acquires the detected obstacle information through the information acquisition module 2, and the control module 3 controls the laser projection module 4 to work according to the obstacle information acquired by the information acquisition module 2: when no obstacle is detected, the laser projection module 4 is maintained in the open state; when the obstacle is detected, the distance L between the obstacle and the vehicle and the preset distance L are judged0The size of (d); when the distance L between the obstacle and the vehicle is larger than the preset distance L0When the laser projection module 4 is in the on state, the laser projection module 4 is kept in the off state; when the distance L between the obstacle and the vehicle is less than or equal to the preset distance L0When so, the laser projection module 4 is turned off.
The laser safety protection system provided by the above basic embodiment of the invention judges whether the laser projection module works or not by detecting whether an obstacle exists in the laser irradiation range and detecting the temperature of the obstacle in time, comparing the distance between the obstacle and the vehicle with the preset distance, and comparing the temperature of the obstacle with the preset temperature, so as to prevent the phenomenon of combustion or explosion caused by the temperature increase of the obstacle after laser irradiation, reduce the possible damage of laser irradiation to personnel inside or outside the vehicle, and improve the driving safety.
In one embodiment of the present invention, the left side area and the right side area of the vehicle have at least two divisions in the front-rear direction, respectively; the sensing module 1 is also used for sensing the subarea of the obstacle on the left side or the right side of the vehicle; the control module 3 is adapted to control whether the laser projection module 4 projects or not in the zone in which the obstacle is located.
The laser safety protection system provided by the above specific embodiment can control the projection of the laser pattern of the laser projection module 4 in the partition where the obstacle is located, can prevent the combustion or explosion phenomenon caused by the temperature increase of the obstacle after laser irradiation, reduce the damage of the laser irradiation to the personnel inside the vehicle or the personnel outside the vehicle, and can ensure the use of the laser projection module 4, particularly when the laser safety protection system is used for showing the outline of the vehicle, so as to clearly show the outline of the vehicle and prevent traffic accidents.
As a preferred embodiment of the present invention, the left and right side areas of the vehicle have 3 to 5 divisions in the front-rear direction or in the left-right direction, respectively.
Taking fig. 8 as an example, the left area of the vehicle and the right area of the vehicle are respectively provided with 4 zones along the front-rear direction, and taking the left area of the vehicle as an example, the zones of the left area of the vehicle are respectively a zone I, a zone II, a zone III and a zone IV from front to rear, and if the area where the sensing module 1 is used for detecting the obstacle on the left side of the vehicle belongs to the zone II, the control module 3 is adapted to control whether the laser projection module 4 projects on the zone II or not.
Specifically, as shown in fig. 1 and 3, the laser safety protection system includes a sensing module 1, an information collecting module 2, a control module 3, and a laser projection module 4; the laser projection module 4 is used for forming a laser pattern and projecting the laser pattern on the ground; the left side area and the right side area of the vehicle are respectively provided with at least two subareas along the front and back direction; the sensing module 1 is used for detecting whether an obstacle exists around the vehicle, the distance between the obstacle and the vehicle, the temperature of the obstacle and a partition where the obstacle is located on the left side or the right side of the vehicle; the information acquisition module 2 is suitable for acquiring the obstacle information detected by the sensing module 1; the control module 3 is suitable for judging whether obstacles exist around the vehicle according to the obstacle information, and if not, the laser projection module 4 is maintained in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If so, the method will be usedThe laser projection module 4 closes the laser pattern of the partition where the obstacle is located; if not, the laser projection module 4 is maintained in the open state.
In one embodiment of the invention, the sensing module 1 comprises a plurality of infrared sensors for detecting the temperature of the obstacles and a plurality of distance measuring radars for detecting the distance L between the vehicle and the obstacles, wherein the distance measuring radars are dispersedly arranged on the body of the vehicle so that the distance measuring radars can respectively detect the distances between the obstacles and the vehicle in different zones; the infrared sensors are dispersedly arranged on the left side and the right side of the vehicle body so as to be capable of detecting the temperature information of obstacles on the left side and the right side of the vehicle body; the signal output ends of the infrared sensor and the ranging radar are connected to the signal input end of the information acquisition module; the control module 3 is suitable for controlling whether the laser projection module 4 projects in the subarea where the obstacle is located or not according to the distance measured by each ranging radar.
Specifically, a plurality of range finding radars divide into two sets ofly, set up respectively in the left and right sides of vehicle, and every range finding radar of group is equipped with 2 at least, and the number that range finding radar set up equals with the subregion of the vehicle left and right sides, and every range finding radar is used for detecting the barrier information of a subregion. Taking fig. 8 as an example, the left side of the vehicle has a section I, a section II, a section III, and a section IV arranged from front to rear, and four range radars (A, B, C, D) are arranged on the left side of the vehicle body at intervals in the front-rear direction. Range radar A is used for measuring subregion I and whether the barrier appears, and range radar B is used for measuring subregion II and whether the barrier appears, and range radar C is used for measuring subregion III and whether the barrier appears, and range radar D is used for subregion IV and whether the barrier appears.
Because the electromagnetic waves emitted by the ranging radar are emitted outwards in a fan-shaped mode, the radiation ranges of two adjacent ranging radars are partially overlapped. When the A ranging radar detects an obstacle and the distance between the obstacle and the vehicle is less than L0Closing the laser projection of the subarea I; when the distance measuring radar B detects the obstacle and the distance between the obstacle and the vehicle is less than or equal to L0Closing the laser projection of the partition II; when range radar A and range radar B detect simultaneouslyTo an obstacle and wherein at least one range radar measures a distance between the obstacle and the vehicle that is less than L0And then, the laser projection of the area corresponding to the ranging radar which detects the obstacle with shorter distance from the vehicle can be closed, and the operation of the laser projection module 4 is controlled according to the distance between the obstacle detected by each ranging radar and the ranging radar.
Here the predetermined distance L0The farthest distance from the ranging radar to the periphery of the laser pattern can be set as: in fig. 8, the distance from the ranging radar a to the outermost periphery of the laser pattern of the laser projection module 4 in the partition I, or the distance from the ranging radar D to the outermost periphery of the laser pattern of the laser projection module 4 in the partition IV is shown. Specifically, the maximum distance between the laser pattern in the partition I and the ranging radar a or the maximum distance between the laser pattern in the partition IV and the ranging radar D may be used.
Wherein, infrared sensor can set up two, sets up respectively in the left and right sides of automobile body, measures the barrier and detects the distance L that barrier and automobile body and be less than or equal to preset distance L when range radar0When the automobile is used, the control module 3 controls the infrared sensors to detect the temperature of the obstacles, the infrared sensors can be rotatably connected with the automobile body, and the control module 3 controls the rotation angles of the infrared sensors to enable the infrared sensors to detect the temperature of the obstacles in each subarea. The infrared sensors can be arranged in a plurality of positions, the number of the infrared sensors is the same as that of the ranging radars, and each infrared sensor correspondingly detects the temperature of the obstacles in each subarea.
In an embodiment of the present invention, the control module 3 is further adapted to determine whether the speed v of the vehicle is greater than a preset speed v according to the speed information detected by the speed measuring unit of the vehicle itself0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, whether obstacles exist around the vehicle is judged. The device can further prevent the phenomenon of combustion or explosion caused by the temperature increase of the barrier after laser irradiation, reduce the damage of the laser irradiation to personnel in the vehicle or personnel outside the vehicle, and improve the driving safety. Meanwhile, the method can be used when the speed is high, the laser irradiation time is short, and the temperature rise effect of the barrier is not obviousAnd the normal work of the laser projection module 4 is ensured.
Here the preset speed v0It may be set by a person skilled in the art according to the intensity of the laser, and if the intensity of the laser is higher, the preset speed v is set0Can be set relatively large; if the intensity of the laser is low, the preset speed v0A relatively small point can be set. For example, when the intensity of the laser is greater than or equal to 0.5W, the predetermined speed v is set0Can be set to 5 km/; when the intensity of the laser is greater than or equal to 1W, the preset speed v is0Can be set to 10 km/h; when the intensity of the laser is greater than or equal to 2W, the preset speed v is0May be set to 20 km/h. Of course, the above description is only one possible embodiment, and those skilled in the art can make modifications in the specific implementation process according to the actual situation.
As a specific embodiment of the present invention, as shown in fig. 5, the laser safety protection system includes a sensing module 1, an information collecting module 2, a control module 3, and a laser projection module 4; the laser projection module 4 is used for forming a laser pattern and projecting the laser pattern on the ground; the sensing module 1 is used for detecting whether an obstacle exists around the vehicle, the distance between the obstacle and the vehicle and the temperature of the obstacle; the information acquisition module 2 is suitable for acquiring the obstacle information detected by the sensing module 1; the control module 3 is suitable for judging whether the speed v of the vehicle is greater than the preset speed v according to the speed information detected by the speed measuring unit of the vehicle0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether obstacles exist around the vehicle according to the obstacle information, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If not, the laser projection module 4 is maintained in an open state; if yes, the laser projection module 4 is turned off.
The laser safety protection system provided by the above specific embodiment can further prevent the phenomenon of combustion or explosion caused by the temperature increase of the barrier after laser irradiation, reduce the damage of laser irradiation to personnel inside the vehicle or personnel outside the vehicle, and improve the driving safety. Meanwhile, the normal work of the laser projection module 4 can be ensured when the speed is high and the laser heating effect is not obvious.
As an embodiment of the present invention, the unit for detecting the vehicle speed of the vehicle itself may include a speed radar for detecting the vehicle speed v; the signal output ends of the speed measuring radars are connected to the signal input end of the information acquisition module 2. Or the device comprises a Hall sensor for detecting the rotating speed of the wheel, the running speed of the vehicle is calculated through the rotating speed R of the wheel and the diameter d of the wheel, and the signal output ends of the Hall sensor are connected to the signal input end of the information acquisition module 2. More specifically, the calculation formula v of the vehicle speed is d pi R.
In an embodiment of the present invention, the control module 3 is further adapted to calculate a temperature change gradient Δ T of the obstacle according to the temperature information of the obstacle, and determine whether the temperature change gradient Δ T is greater than a preset temperature change gradient Δ T0(ii) a If yes, the laser projection module 4 is closed; if not, the laser projection module 4 is maintained in the open state.
As a specific embodiment of the present invention, as shown in fig. 6, the laser safety protection system includes a sensing module 1, an information collecting module 2, a control module 3, and a laser projection module 4; the laser projection module 4 is used for forming a laser pattern and projecting the laser pattern on the ground; the sensing module 1 is used for detecting whether an obstacle exists around the vehicle, the distance between the obstacle and the vehicle and the temperature of the obstacle; the information acquisition module 2 is suitable for acquiring the obstacle information detected by the sensing module 1; the control module 3 is suitable for judging whether obstacles exist around the vehicle according to the obstacle information, and if not, the laser projection module 4 is maintained in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If not, projecting the laser to the moldThe block 4 is maintained in the open state; if yes, calculating the temperature change gradient delta T of the obstacle according to the temperature information of the obstacle, and judging whether the temperature change gradient delta T is larger than a preset temperature change gradient delta T or not0(ii) a If yes, the laser projection module 4 is closed; if not, the laser projection module 4 is maintained in the open state.
In particular, the preset temperature variation gradient Δ T0Can be specifically set by those skilled in the art according to actual conditions, and more specifically can be set to be 5-10 ℃/s, and the preset temperature change gradient is only taken as an embodiment of the invention, and is not a preset temperature change gradient Delta T0The specific limitations of (a).
The laser safety protection system provided by the above specific embodiment can further prevent the phenomenon of combustion or explosion caused by the sharp temperature increase of the barrier after laser irradiation, reduce the possible damage of laser irradiation to the personnel inside the vehicle or the personnel outside the vehicle, and improve the driving safety. Meanwhile, the normal work of the laser projection module 4 can be ensured when the speed is high and the laser heating effect is not obvious.
In one embodiment of the present invention, as shown in fig. 4, the laser projection module 4 includes a projection image display unit 41 that forms a laser pattern and a projection position adjustment unit 42 that adjusts a projection position of the laser pattern; the control module 3 is electrically connected to the projection image display unit 41 to control the opening and closing of the projection image display unit 41; the control module 3 is electrically connected to the projection position adjusting unit 42 to control the projection position of the laser pattern. The projection of the laser pattern and the projection of the laser pattern within the different zones can be controlled jointly by the projection position adjustment unit 42 and the projection image display unit 41.
As a relatively preferred embodiment of the present invention, as shown in fig. 4, 7 and 8, the laser safety protection system includes a sensing module 1, an information collecting module 2, a control module 3, a laser projecting module 4 and a speed measuring unit 5; the laser projection module 4 includes a projection image display unit 41 that forms a laser pattern and a projection position adjustment unit 42 that adjusts a projection position of the laser pattern; control module 3 and projection imageThe display unit 41 is electrically connected to control opening and closing of the projection image display unit 41; the control module 3 is electrically connected with the projection position adjusting unit 42 to control the projection position of the laser pattern; the left side area and the right side area of the vehicle are respectively provided with at least two subareas along the front and back direction; the sensing module 1 is used for detecting whether an obstacle exists around the vehicle, the distance between the obstacle and the vehicle, the temperature of the obstacle and a partition where the obstacle is located on the left side or the right side of the vehicle; the speed measuring unit 5 is used for detecting the running speed v of the vehicle relative to the obstacle; the information acquisition module 2 is suitable for acquiring the obstacle information detected by the sensing module 1 and the driving speed v of the obstacle detected by the speed measurement unit 5; the control module 3 is adapted to determining whether the speed v of the vehicle is greater than a preset speed v based on the speed information0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether obstacles exist around the vehicle according to the obstacle information, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If not, the laser projection module 4 is maintained in an open state; if yes, calculating the temperature change gradient delta T of the obstacle according to the temperature information of the obstacle, and judging whether the temperature change gradient delta T is larger than a preset temperature change gradient delta T or not0(ii) a If yes, closing the laser pattern of the laser projection module 4 in the partition where the obstacle is located; if not, the laser projection module 4 is maintained in the open state.
The laser safety protection system provided by the above preferred embodiment of the present invention can prevent the combustion or explosion phenomenon caused by the temperature increase of the obstacle after laser irradiation, reduce the possible damage of laser irradiation to the personnel inside or outside the vehicle, and improve the driving safety. While at the same time not affecting the normal use of the laser projection module 4.
In addition, the basic embodiment of the present invention provides a laser safety protection method, as shown in fig. 2, including the following steps:
(1) detecting information whether obstacles exist around a vehicle, distance information between the obstacles and the vehicle and temperature information of the obstacles, and acquiring the information of the obstacles;
(2) judging whether obstacles exist around the vehicle according to the obstacle information of the vehicle, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If yes, the laser projection module 4 is closed; if not, the laser projection module 4 is maintained in the open state.
According to the laser safety protection method provided by the basic embodiment of the invention, whether the barrier exists in the laser irradiation range or not is detected, the temperature of the barrier is detected in time, the distance between the barrier and the vehicle is compared with the preset distance, and the temperature of the barrier is compared with the preset temperature, so that whether the laser projection module works or not is judged, the phenomenon that the barrier is burnt or exploded due to temperature increase after being irradiated by laser is prevented, the possible damage of laser irradiation to personnel inside or outside the vehicle is reduced, and the driving safety is improved.
In one embodiment of the present invention, as shown in fig. 3, the laser safety protection method includes the following steps:
(1) dividing a left area and a right area of a vehicle into at least two subareas along the front-back direction;
(2) detecting whether the information of obstacles exists around the vehicle, the distance information between the obstacles and the vehicle, the temperature information of the obstacles and the subareas where the obstacles are located on the left side or the right side of the vehicle, and acquiring the information of the obstacles;
(3) judging whether obstacles exist around the vehicle according to the obstacle information of the vehicle, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging the barrierWhether the temperature T is greater than a preset temperature T0(ii) a If yes, closing the laser pattern of the laser projection module 4 in the partition where the obstacle is located; if not, the laser projection module 4 is maintained in the open state.
The laser safety protection method provided by the above specific embodiment can control the projection of the laser pattern of the laser projection module 4 in the partition where the obstacle is located, can prevent the combustion or explosion phenomenon caused by the temperature increase of the obstacle after laser irradiation, reduce the possible damage of laser irradiation to the personnel inside or outside the vehicle, and can ensure the use of the laser projection module 4, particularly when the laser safety protection method is used for vehicle outline showing, clearly show the outline of the vehicle, and prevent traffic accidents.
As another embodiment of the present invention, as shown in fig. 5, the laser safety protection method includes the following steps:
(1) detecting information whether obstacles exist around a vehicle, information of the distance between the obstacles and the vehicle and temperature information of the obstacles, and acquiring the information;
(2) judging whether the speed v of the vehicle is greater than a preset speed v or not according to the speed information detected by the vehicle0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether obstacles exist around the vehicle, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If yes, the laser projection module 4 is closed; if not, the laser projection module 4 is maintained in the open state.
The laser safety protection method provided by the above specific embodiment can further prevent the phenomenon of combustion or explosion caused by the temperature increase of the barrier after laser irradiation, reduce the possible damage of laser irradiation to the personnel inside the vehicle or the personnel outside the vehicle, and improve the driving safety. Meanwhile, the normal work of the laser projection module 4 can be ensured when the speed is high and the laser heating effect is not obvious.
In one embodiment of the present invention, as shown in fig. 6, the laser safety protection method includes the following steps:
(1) dividing a left area and a right area of a vehicle into at least two subareas along the front-back direction;
(2) detecting whether the information of obstacles exists around the vehicle, the distance information between the obstacles and the vehicle, the temperature information of the obstacles and the subareas where the obstacles are located on the left side or the right side of the vehicle, and acquiring the information of the obstacles;
(3) judging whether obstacles exist around the vehicle according to the obstacle information of the vehicle, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If not, the laser projection module 4 is maintained in an open state; if so, calculating the temperature change gradient delta T of the obstacle according to the temperature information of the obstacle, and judging whether the temperature change gradient delta T is larger than a preset temperature change gradient delta T or not0(ii) a If yes, the laser projection module 4 is closed; if not, the laser projection module 4 is maintained in an open state.
In a relatively preferred embodiment of the present invention, as shown in fig. 7, the laser safety protection method comprises the following steps:
(1) dividing a left area and a right area of a vehicle into at least two subareas along the front-back direction;
(2) detecting information whether an obstacle exists around the vehicle, information about the distance between the obstacle and the vehicle, information about the temperature of the obstacle, the running speed v of the vehicle relative to the obstacle and a partition where the obstacle is located on the left side or the right side of the vehicle, and collecting the information;
(3) judging whether the speed v of the vehicle is greater than the preset speed v according to the information0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, the user can not select the specific application,judging whether barriers exist around the vehicle or not, and if not, maintaining the laser projection module 4 in an open state; if yes, judging whether the distance L between the obstacle and the vehicle is larger than the preset distance L or not0(ii) a If yes, the laser projection module 4 is maintained in an open state; if not, judging whether the temperature T of the barrier is greater than the preset temperature T or not0(ii) a If not, the laser projection module 4 is maintained in an open state; if so, calculating the temperature change gradient delta T of the obstacle according to the temperature information of the obstacle, and judging whether the temperature change gradient delta T is larger than a preset temperature change gradient delta T or not0(ii) a If yes, closing the laser pattern of the laser projection module 4 in the partition where the obstacle is located; if not, the laser projection module 4 is maintained in the open state.
The laser safety protection method provided by the above preferred embodiment of the present invention can prevent the combustion or explosion phenomenon caused by the temperature increase of the obstacle after laser irradiation, reduce the possible damage of laser irradiation to the personnel inside or outside the vehicle, and improve the driving safety. While at the same time not affecting the normal use of the laser projection module 4.
The embodiment of the invention also provides a vehicle which comprises the laser safety protection system of the embodiment.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (11)
1. A laser safety protection system is characterized by comprising a sensing module (1), an information acquisition module (2), a control module (3) and a laser projection module (4);
the laser projection module (4) is used for forming a laser pattern and projecting the laser pattern onto the ground;
the sensing module (1) is used for detecting whether an obstacle exists around a vehicle, the distance between the obstacle and the vehicle and the temperature of the obstacle;
the information acquisition module (2) is suitable for acquiring the obstacle information detected by the sensing module (1);
the control module (3) is suitable for judging whether obstacles exist around the vehicle according to the obstacle information, and if not, the laser projection module (4) is maintained in an open state; if yes, judging whether the distance L between the barrier and the vehicle is larger than a preset distance L or not0(ii) a If yes, maintaining the laser projection module (4) in an open state; if not, judging whether the temperature T of the barrier is greater than a preset temperature T or not0(ii) a If yes, the laser projection module (4) is closed; if not, the laser projection module (4) is maintained in an open state.
2. The laser safety protection system according to claim 1, wherein the left side area and the right side area of the vehicle have at least two sections in a front-rear direction, respectively;
the sensing module (1) is also used for sensing the subarea of the obstacle on the left side or the right side of the vehicle;
the control module (3) is suitable for controlling whether the laser projection module (4) projects in the partition where the obstacle is located.
3. The laser safety protection system according to claim 2, wherein the sensing module (1) comprises a plurality of infrared sensors for detecting the temperature of the obstacle and a plurality of range radars for detecting the distance L between the vehicle and the obstacle, and the range radars are dispersedly arranged on the body of the vehicle so that the range radars can respectively detect the distance between the obstacle and the vehicle in different zones; the infrared sensors are dispersedly arranged on the left side and the right side of the vehicle body so as to be capable of detecting the temperature information of the obstacles on the left side and the right side of the vehicle body;
the signal output ends of the infrared sensor and the ranging radar are connected to the signal input end of the information acquisition module;
the control module (3) is suitable for controlling whether the laser projection module (4) projects in the partition where the obstacle is located or not according to the distance measured by each ranging radar.
4. The laser safety protection system according to any one of claims 1-3, wherein the control module (3) is further adapted to determine whether the speed v of the vehicle is greater than a preset speed v according to the speed information detected by the speed measurement unit of the vehicle itself0(ii) a If yes, maintaining the laser projection module (4) in an open state; if not, judging whether obstacles exist around the vehicle or not.
5. The laser safety protection system according to claim 4, wherein the control module (3) is further adapted to calculate a temperature change gradient Δ T of the obstacle according to the temperature information of the obstacle and determine whether the temperature change gradient Δ T is greater than a preset temperature change gradient Δ T0(ii) a If yes, the laser projection module (4) is closed; if not, the laser projection module (4) is maintained in an open state.
6. The laser safety protection system according to any one of claims 1-3, wherein the laser projection module (4) comprises a projection image display unit (41) for forming a laser pattern and a projection position adjusting unit (42) for adjusting a projection position of the laser pattern;
the control module (3) is electrically connected with the projection image display unit (41) to control the opening and closing of the projection image display unit (41);
the control module (3) is electrically connected with the projection position adjusting unit (42) to control the projection position of the laser pattern.
7. A laser safety protection method is characterized by comprising the following steps:
(1) detecting information whether obstacles exist around a vehicle, distance information between the obstacles and the vehicle and temperature information of the obstacles, and acquiring the information of the obstacles;
(2) judging whether obstacles exist around the vehicle according to the obstacle information of the vehicle, and if not, maintaining the laser projection module (4) in an open state; if yes, judging whether the distance L between the barrier and the vehicle is larger than a preset distance L or not0(ii) a If yes, maintaining the laser projection module (4) in an open state; if not, judging whether the temperature T of the barrier is greater than a preset temperature T or not0(ii) a If yes, the laser projection module (4) is closed; if not, the laser projection module (4) is maintained in an open state.
8. The laser safety protection method according to claim 7, further comprising: dividing a left side area and a right side area of the vehicle into at least two subareas along the front-back direction; detecting the subarea of the obstacle on the left side or the right side of the vehicle; and controlling whether the laser projection module (4) projects in the partition where the obstacle is located.
9. The laser safety protection method according to claim 7, further comprising: judging whether the speed v of the vehicle is greater than a preset speed v or not according to the speed information detected by the vehicle0(ii) a If yes, maintaining the laser projection module (4) in an open state; if not, judging whether the distance between the obstacle and the vehicle is larger than a preset distance L or not according to the obstacle information.
10. The laser safety protection method according to any one of claims 7-9, wherein a temperature change gradient Δ Τ of the obstacle is calculated according to temperature information of the obstacle, and it is determined whether the temperature change gradient Δ Τ is greater than a predetermined valueSetting the temperature gradient Δ T0(ii) a If yes, the laser projection module (4) is closed; if not, the laser projection module (4) is maintained in an open state.
11. A vehicle comprising a laser safety protection system according to any one of claims 1 to 6 and performing a laser safety protection method according to any one of claims 7 to 10.
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| CN106441141A (en) * | 2016-12-05 | 2017-02-22 | 南京科远自动化集团股份有限公司 | Combustion detection system and combustion detection method thereof |
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| US7630806B2 (en) * | 1994-05-23 | 2009-12-08 | Automotive Technologies International, Inc. | System and method for detecting and protecting pedestrians |
| US9987971B2 (en) * | 2016-07-29 | 2018-06-05 | International Business Machines Corporation | Drone-enhanced vehicle external lights |
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| KR20150093932A (en) * | 2014-02-09 | 2015-08-19 | 박철홍 | Warning Lazer |
| CN106314266A (en) * | 2016-09-07 | 2017-01-11 | 长沙中联消防机械有限公司 | The warning control method of vehicle, control device, control system and fire fighting truck |
| CN106441141A (en) * | 2016-12-05 | 2017-02-22 | 南京科远自动化集团股份有限公司 | Combustion detection system and combustion detection method thereof |
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