CN113459981A - Truck driver emergency braking protection device and protection method thereof - Google Patents
Truck driver emergency braking protection device and protection method thereof Download PDFInfo
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- CN113459981A CN113459981A CN202110816231.XA CN202110816231A CN113459981A CN 113459981 A CN113459981 A CN 113459981A CN 202110816231 A CN202110816231 A CN 202110816231A CN 113459981 A CN113459981 A CN 113459981A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
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Abstract
The invention discloses an emergency braking protection device for a truck driver, which is matched with a truck controller of a truck for use and comprises a data acquisition mechanism, wherein the data acquisition mechanism is in signal connection with a control mechanism and the truck controller; when goods with large inertia such as steel materials, pipes and the like are transported by a truck, the control mechanism starts the actuating mechanism in an emergency braking state, and selects to start the safety air bag or simultaneously start the bounce air bag according to the grade of the emergency state, when the braking condition is serious, the bounce air bag is started to bounce the cab forward, so that a driver is transferred to a relatively lower position, the goods on the upper part in the carriage pass through the upper part of the driver when moving forward, the risk that the driver is scratched by the goods and even collides is avoided, the driver is protected, and the safety of personnel in the transportation process is improved.
Description
Technical Field
The invention relates to the technical field of safe braking of a truck, in particular to an emergency braking protection device for a truck driver and a protection method specially used by the emergency braking protection device.
Background
Steel is a basic raw material with wide application, and is widely used in many industries, such as house building, highway maintenance and construction, machining and manufacturing, and the like, and the used amount is large. According to the different purposes of steel, the volume and the length of the steel are different, and the steel is often loaded and unloaded by a crane in the transportation, loading and unloading processes. The transportation mode generally includes two kinds of modes of train transportation and freight train transportation, and wherein the train transportation security is high, but its cost of transportation is also higher and inconvenient loading and unloading, consequently chooses for use the transport relatively comparatively economy and the platform truck of convenient loading and unloading more for use, but each commercial car factory does not have the vehicle type of producing for steel transportation specially yet at present, and the boxcar driver can only use ordinary large truck to transport.
However, when a common large truck is used for steel transportation, steel materials are all stacked in the carriage, and due to the fact that the steel materials are large in mass, large inertia can be generated in the running process of a transportation train, the steel materials are not easy to fix in the carriage due to the influence of the shape of the steel materials, when a truck driver needs to brake for parking emergently in case of sudden accidents, the steel materials on the upper portion in the truck carriage can slide forwards due to the inertia, seriously and directly penetrate through the cab to fall onto the road surface in front of the cab, and the life safety of the driver is directly threatened.
Aiming at the phenomenon, each automobile enterprise is provided with a special passive safety device on the produced vehicle at present, the passive safety device mainly realizes the safety function of vehicle running by means of an air bag, and the air bag can expand to play a role only after the vehicle is seriously impacted by the front or the side surface to cause the rapid speed change, so that the air bag can not be opened before the vehicle is not collided, the starting can not be predicted in advance, and the protection effect on a driver is very limited.
Disclosure of Invention
The invention aims to provide a truck driver emergency braking protection device which can be used for preventing a vicious accident caused by forward movement of a steel pipe by bouncing up a cab and transferring a driver to a relatively low position.
In order to solve the technical problems, the technical scheme of the invention is as follows: the emergency braking protection device for the truck driver is matched with a whole truck controller of a truck for use and comprises a data acquisition mechanism, wherein the data acquisition mechanism is in signal connection with a control mechanism and the whole truck controller, and the output ends of the control mechanism and the whole truck controller are also connected with an execution mechanism;
the data acquisition mechanism acquires cargo weight information, brake pedal state information, braking distance information during emergency braking of the truck, truck running speed information and cargo collision information to form acquired information, and transmits the acquired information to the control mechanism and the whole vehicle controller in real time, wherein the brake pedal state information comprises pedal angular displacement information and pedal stress information;
standard information is arranged in the control mechanism, and the acquired information is received in real time; the control mechanism compares partial information of the acquired information with the standard information and judges whether to drive the execution mechanism to act or not according to a comparison result; when the actuator is determined to be driven to act, a corresponding control command is generated and transmitted to the actuator;
the execution mechanism receives control commands of the control mechanism and the vehicle control unit and generates corresponding actions according to the control commands;
the actuating mechanism comprises an air bag arranged in a cab, an air bag actuator which is correspondingly arranged in the cab and used in a matched mode, the air bag actuator is connected to the control end of the vehicle control unit, the actuating mechanism further comprises a bouncing air bag arranged below the cab, the bouncing air bag actuator which is arranged in the bouncing air bag and used in a matched mode is arranged, and the bouncing air bag actuator is connected to the control mechanism.
As a preferred technical solution, the data acquisition mechanism comprises a weight sensor forming the cargo weight information, the weight sensor is arranged and installed below a floor of the boxcar, and the weight sensor is connected to the input end of the control mechanism;
the pedal travel sensor forms the angular displacement information of the pedal, the pedal force sensor forms the force information of the pedal, the pedal travel sensor and the pedal force sensor are respectively arranged and installed below a brake pedal, and the pedal travel sensor and the pedal force sensor are respectively connected to the input end of the control mechanism;
the braking distance sensor is arranged on a chassis circuit of the truck and is connected to the input end of the control mechanism;
the speed sensor is arranged on a hub of the truck and connected to the input end of the whole vehicle controller;
and the collision sensor is arranged on a front protective guard of a carriage of the truck and is connected to the input end of the control mechanism.
As a preferred technical solution, the control mechanism includes a central processing unit, and the central processing unit is provided with a storage unit for setting and storing the standard information and an analysis unit for comparing data.
As a preferable technical scheme, the bouncing air bag actuator and the safety air bag actuator are structurally corresponding; the bounce airbag actuator comprises an airbag sensor, an igniter and an inflator, and an inflation end of the inflator is communicated to the bounce airbag.
The invention also discloses a protection method of the truck driver emergency brake protection device, which comprises the following steps,
S1standard information setting
Acquiring the corresponding rated load capacity of the truck according to the model of the truck, inputting and storing a rated load value into the control mechanism, and carrying out load grading on the load of the truck through the control mechanism;
setting corresponding maximum braking distance and maximum braking speed corresponding to each load grade in the control mechanism, and setting pedal angular displacement limit and pedal stress limit values in the control mechanism;
S2load grading
The data acquisition mechanism is used for acquiring the cargo weight information of the truck and transmitting the cargo weight information to the control mechanism, and the control mechanism is used for comparing the cargo weight information with the rated load capacity to determine the current load level of the truck;
S3and judging the braking state of the truck
S3-1The data acquisition mechanism acquires the angular displacement information and the stress information of the pedal in real time and transmits the information to the control mechanism;
S3-2comparing the pedal angular displacement information with the pedal angular displacement limit and comparing the pedal stress information with the pedal stress limit value of the control mechanism;
S3-3when the pedal angular displacement information is smaller than the pedal angular displacement limit or the pedal stress information is smaller than the pedal stress limit, the control mechanism judges that the truck is in a normal braking state and does not select a braking control strategy;
when the pedal angular displacement information is not less than the pedal angular displacement limit and the pedal stress information is not less than the pedal stress limit value, the control mechanism judges that the truck is in an emergency braking state;
S4emergency brake control strategy
S4-1The control mechanism calls the correspondingly set maximum braking distance and maximum braking speed according to the determined load grade;
S4-2the data acquisition mechanism acquires the braking distance information and the running speed information in real time and respectively transmits the braking distance information and the running speed information to the control mechanism, and the control mechanism controls the braking distance information and the running speed information according to the braking distance information and the running speed informationThe comparison of the dynamic distance information with the maximum braking distance forms the following decision:
when the braking distance information is smaller than the maximum braking distance, the control mechanism judges that the truck enters an emergency braking state, and the control mechanism generates an emergency braking state control signal to control the execution mechanism to execute S5The strategy of the step;
when the braking distance information is larger than or equal to the maximum braking distance, the control mechanism judges that the truck has the sign of out-of-control, and the S step is started4-3A step of;
S4-3the control mechanism compares the running speed information with the maximum braking speed;
when the running speed information is less than the maximum braking speed, the control mechanism judges that the truck enters a semi-out-of-control state, generates a semi-out-of-control state control signal and controls the execution mechanism to execute S6The strategy of the step;
when the running speed information is not less than the maximum braking speed, the control mechanism judges that the truck enters a complete out-of-control state, the control mechanism generates a complete control state control signal and controls the execution mechanism to execute S6～S7The strategy of the step;
S5airbag control strategy
The control mechanism transmits an emergency braking state control signal to the vehicle control unit, and the vehicle control unit starts the safety air bag through the safety air bag actuator after receiving the signal to realize driver protection;
S6control strategy for preparing for bounce
The control mechanism controls the bounce air bag to inflate through the bounce air bag actuator, so that the air pressure in the bounce air bag reaches a cab bounce critical value;
S7control strategy for bounce
After the data acquisition mechanism acquires the goods collision information, signals are transmitted to the control mechanism in real time, the control mechanism immediately judges that the truck is in a dangerous state, and the control mechanism controls the bouncing air bag to carry out secondary inflation through the bouncing air bag actuator to bounce the cab, so that the driver is protected.
Preferably, the control means divides the load of the truck into four load levels, i.e., 40% or less load, 60% or less load, 80% or less load, and 100% or less load, when the load is divided into the load levels.
In a preferred embodiment, the cab bounce threshold is converted into an inflation time by combining the inflation speed and the volume of the bounce airbag, and the inflation time is prestored in the bounce airbag actuator or the control mechanism.
As an improvement to the technical scheme, an electromagnetic lock is arranged between a cab and a frame of the truck, and the electromagnetic lock is connected to the control mechanism.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: when utilizing freight train transportation steel, when great goods of inertia such as tubular product, actuating mechanism can start under the emergency braking state actuating mechanism, select to start the air bag according to the emergency state grade or start simultaneously and bounce the gasbag, when braking condition is serious, bounce the gasbag start can bounce the driver's cabin forward, shift the driver to the position lower relatively, pass from the driver top when making the goods on upper portion in the carriage take place to move forward, avoided the driver by the risk of goods fish tail or even clash, help protecting the driver, thereby personnel's security in the improvement transportation.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
Wherein:
FIG. 1 is a block diagram of the architecture of an embodiment of the present invention;
FIG. 2 is a schematic diagram of load level settings within the CPU of an embodiment of the present invention;
fig. 3 is a control flow chart of the pop-up airbag embodying the present invention;
FIG. 4 is a workflow diagram of an embodiment of the present invention;
FIG. 5 is a schematic illustration of a normal transport state of an embodiment of the present invention;
FIG. 6 is a schematic view of a cab being bounced in accordance with an embodiment of the present invention;
in the figure: 1-a cab; 2-bounce the air bag.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, the emergency braking protection device for a truck driver, which is used in cooperation with a vehicle control unit of a truck, includes a data acquisition mechanism, the data acquisition mechanism is in signal connection with a control mechanism and the vehicle control unit, and the output ends of the control mechanism and the vehicle control unit are further connected with an execution mechanism. The data acquisition mechanism is used for detecting various parameters of the truck in real time and transmitting the parameters to the control mechanism or the whole vehicle controller, the control mechanism compares the parameters and judges the running state of the truck, and when the emergency braking of the truck is judged, the execution mechanism is controlled to perform corresponding actions according to the braking grade, so that the life protection of a driver is finally realized.
The data acquisition mechanism acquires cargo weight information, brake pedal state information, braking distance information during emergency braking of the truck, truck running speed information and cargo collision information to form acquisition information, and transmits the acquisition information to the control mechanism and the vehicle control unit in real time, wherein the brake pedal state information comprises pedal angular displacement information and pedal stress information. The data acquisition of the data acquisition mechanism is realized by arranging a corresponding sensor.
Specifically, the data acquisition mechanism comprises a weight sensor forming the cargo weight information, the weight sensor is arranged and mounted below a floor of the boxcar, and the weight sensor is connected to the input end of the control mechanism. The weight sensor senses the weight of the goods in the carriage, and transmits a weight signal to the control mechanism to judge whether the goods are overloaded or the load grade is confirmed. The pedal travel sensor or the pedal displacement sensor and the pedal force sensor are respectively arranged below a brake pedal, and the pedal travel sensor and the pedal force sensor are respectively connected to the input end of the control mechanism. The sensors are matched to sense the pedal treading state of a driver during braking, and transmit signals to the control mechanism so as to judge whether the vehicle is in an emergency braking state or a normal braking state. And the braking distance sensor is arranged on a chassis circuit of the truck and is connected to the input end of the control mechanism. The braking distance sensor is used for sensing displacement of the truck during emergency braking and transmitting signals to the control mechanism in real time. And the speed sensor is arranged on a hub of the truck and is connected to the input end of the whole vehicle controller. The speed sensor senses the running speed of the truck in real time and transmits a signal to the vehicle control unit, and the vehicle control unit transmits a speed signal to the control mechanism in real time. And the collision sensor is arranged on a front protective guard of a carriage of the truck, is connected to the input end of the control mechanism, and is used for sensing whether goods in the carriage collide against the front protective guard of the carriage or not and transmitting a signal to the control mechanism.
As shown in fig. 2, the control mechanism is provided with standard information and receives the collected information in real time; the control mechanism compares partial information of the acquired information with the standard information and judges whether to drive the execution mechanism to act or not according to a comparison result; and when the actuator is determined to be driven to act, generating a corresponding control command and transmitting the control command to the actuator. Specifically, the control mechanism comprises a central processing unit, and the central processing unit is provided with a storage unit for setting and storing the standard information and an analysis unit for comparing data. The storage unit is used for setting and storing standard information, the analysis unit is mainly used for calling the standard information and comparing data with the acquired information, and the central processing unit is connected with a vehicle control unit of a vehicle and can transmit and process signals in two directions.
As shown in fig. 1 and fig. 3, the executing mechanism receives control commands of the control mechanism and the vehicle control unit, and generates corresponding actions according to the control commands. The actuating mechanism comprises an air bag arranged in the cab, an air bag actuator used in a matched mode is arranged corresponding to the air bag, and the air bag actuator is connected to the control end of the vehicle control unit. The air bag lifting device is characterized by further comprising a lifting air bag arranged below the cab, a lifting air bag actuator matched with the lifting air bag is arranged on the lifting air bag, and the lifting air bag actuator is connected to the control mechanism. The bounce air bag actuator is structurally corresponding to the safety air bag actuator; the bounce airbag actuator comprises an airbag sensor, an igniter and an inflator, and an inflation end of the inflator is communicated to the bounce airbag. The air bag sensor receives a signal of the central processing unit and assists in controlling the on-off of the igniter circuit, after the igniter is switched on, the ignition electrode of the igniter ignites instantly to ignite the gas generating agent in the inflator, and the gas generating agent burns to generate a large amount of nitrogen and enters the bounce air bag rapidly.
When the braking level is low, the safety airbag can be started only to protect the driver because the inertia generated by goods on the truck is not enough to move forward and damage the cab; when the braking grade is higher, the air bag and the bounce air bag are started simultaneously, the air bag is used for directly protecting a driver, the bounce air bag is used for bouncing the cab, the driver is shifted to a relatively low position, and indirect strengthening protection of the driver is realized.
An electromagnetic lock is arranged between a cab and a frame of the truck and connected to the control mechanism, and under the normal condition, the electromagnetic lock is in a locking state and connects the cab with the frame to ensure the driving safety. The control mechanism can open the electromagnetic lock at a proper time to cooperate with the bouncing airbag to bounce the cab smoothly, which is well known to those skilled in the art and will not be described in detail herein.
The embodiment also discloses a protection method of the truck driver emergency braking protection device, which specifically comprises the following steps:
S1standard information setting
In the control mechanism, corresponding maximum braking distance and maximum braking speed are set corresponding to each load grade, and pedal angular displacement limit and pedal stress limit are set in the control mechanism, so that a driver can manually input the limit under the condition of ensuring safety.
Taking a truck with a full load of 20t as an example, the maximum braking distance and the maximum braking speed corresponding to the load grade are shown in the following table:
| load rating | Vehicle weight | Maximum braking distance | Maximum braking speed |
| Load within 40% | M≤8t | 8 m | 5km/h |
| Load within 60% | 8t＜M≤12t | 12 m | 4km/h |
| Load within 80% | 12t＜M≤16t | 16 m | 3km/h |
| Load within 100% | 16t＜M≤20t | 20 m | 2km/h |
S2Load grading
And acquiring the corresponding rated load capacity according to the type of the truck, inputting and storing the rated load value into the control mechanism, and carrying out load grade classification on the load of the truck through the control mechanism. The data acquisition mechanism is used for acquiring the cargo weight information of the truck and transmitting the cargo weight information to the control mechanism, and the control mechanism is used for comparing the cargo weight information with the rated load capacity to determine the current load level of the truck. In this embodiment, when the control means divides the load of the truck into four load levels, i.e., 40% and less of load, 60% and less of load, 80% and less of load, and 100% and less of load.
The factory or the driver inputs and stores the full load value (rated load capacity) of the whole truck in advance in the storage unit of the central processing unit, acquires the real-time load capacity (cargo weight information) of the whole truck through the weight sensor after the cargoes such as steel products and the like are loaded in a carriage of the truck, compares the real-time load capacity (cargo weight information) of the whole truck with the full load value (rated load capacity) of the whole truck in the analysis unit, and determines whether the truck is overloaded currently or not, if not, determines the load grade of the current truck.
S3And judging the braking state of the truck
S3-1And the data acquisition mechanism acquires the angular displacement information of the pedal and the stress information of the pedal in real time and transmits the information to the control mechanism.
S3-2And comparing the pedal angular displacement information with the pedal angular displacement limit and comparing the pedal stress information with the pedal stress limit value.
S3-3And when the pedal angular displacement information is smaller than the pedal angular displacement limit or the pedal stress information is smaller than the pedal stress limit, the control mechanism judges that the truck is in a normal braking state and does not select a braking control strategy.
And when the pedal angular displacement information is not less than the pedal angular displacement limit and the pedal stress information is not less than the pedal stress limit value, the control mechanism judges that the truck is in an emergency braking state.
In brief, the purpose of this step is that in the process of driving a truck, after a driver encounters an emergency, the driver quickly steps on a brake pedal, the pedal force sensor senses the force on the pedal and transmits a signal to the central processing unit, the pedal stroke sensor or the pedal displacement sensor senses the angular displacement of the pedal and transmits the signal to the central processing unit, the central processing unit processes the relevant signal of the brake pedal and judges whether the braking state of the truck is an emergency braking state or a normal braking state, and if the braking state is the normal braking state, the truck can drive normally; and if the vehicle is in the emergency braking state, corresponding control strategies need to be started correspondingly.
S4Emergency brake control strategy
S4-1The control mechanism calls the corresponding load according to the determined load gradeThe set maximum braking distance and the maximum braking speed.
S4-2The data acquisition mechanism acquires the braking distance information and the running speed information in real time, the two kinds of information are numerical value information and are respectively conveyed to the control mechanism, and the control mechanism forms the following judgment according to the comparison between the braking distance information and the maximum braking distance:
when the braking distance information is smaller than the maximum braking distance, the control mechanism judges that the truck enters an emergency braking state, and the control mechanism generates an emergency braking state control signal to control the execution mechanism to execute S5And (4) strategy of the step.
When the braking distance information is larger than or equal to the maximum braking distance, the control mechanism judges that the truck has the sign of out-of-control, and the S step is started4-3And (5) carrying out the following steps.
S4-3And the control mechanism compares the running speed information with the maximum braking speed, wherein the running speed information is numerical value information.
When the running speed information is less than the maximum braking speed, the control mechanism judges that the truck enters a semi-out-of-control state, generates a semi-out-of-control state control signal and controls the execution mechanism to execute S6And (4) strategy of the step.
When the running speed information is not less than the maximum braking speed, the control mechanism judges that the truck enters a complete out-of-control state, the control mechanism generates a complete control state control signal and controls the execution mechanism to execute S6～S7And (4) strategy of the step.
The implementation of this step is exemplified below, and it should be noted that the load level is specifically set according to specific situations, in this case, the load level and S in this example are specifically set2Are shown without correlation. If a truck with the full load mass of 20t senses that the cargo in the carriage does not reach the load of 30 percent (namely 6t), the maximum braking distance is 10 meters, and the maximum braking speed is 5 km/h.
When the braking distance sensor senses that the braking distance is equal to the limit value of 10 meters, the truck is still in the braking state and is not completely stopped, and the truck can be judged to be in a semi-out-of-control state at the moment; if the braking distance of 10 meters is not reached, the truck is stopped, and the truck is in an emergency braking state.
And when the truck reaches the maximum braking distance and is judged to be in a semi-out-of-control state, the central processing unit analyzes the speed signal transmitted by the whole vehicle controller. If the detected speed is less than 5km/h, the truck is in a semi-out-of-control state but not completely out-of-control state; if the detected speed is more than or equal to 5km/h, the truck is in a complete out-of-control state.
S5Airbag control strategy
The control mechanism transmits an emergency braking state control signal to the vehicle control unit, and the vehicle control unit starts the safety air bag through the safety air bag actuator after receiving the signal, so that the protection of a driver is realized.
When the truck is in an emergency braking state, the braking distance sensor senses the braking distance and transmits a signal to the central processing unit in real time, and the central processing unit calls a corresponding braking distance limit value according to the load grade of the truck and judges whether the braking distance of the truck exceeds the braking distance limit value in real time. If the vehicle is still in the braking state and is not stopped after the limit value is reached, the braking distance is still increased, and the vehicle is in a semi-runaway state when the vehicle is in an emergency. The central processing unit transmits a signal to the vehicle control unit to control the safety air bag actuator of the vehicle to work, and the safety air bag in the cab is opened; if the vehicle is stopped when the braking distance limit value is not exceeded, the vehicle is indicated to be in an emergency braking state, no accident occurs, and the central processing unit cannot transmit a signal to the vehicle control unit.
S6Control strategy for preparing for bounce
The control mechanism controls the bounce air bag to inflate through the bounce air bag actuator, so that the air pressure in the bounce air bag reaches a cab bounce critical value.
The speed sensor transmits signals to the vehicle control unit in real time, and the vehicle control unit transmits speed signals to the central processing unit in real time. And the central processing unit calls the corresponding maximum speed value according to the load grade and judges whether the braking speed of the vehicle reaches the maximum braking speed. After the maximum braking distance is confirmed, the central processing unit judges whether the vehicle speed is greater than or equal to the maximum braking speed at the moment. If the speed is lower than the maximum braking speed, the vehicle is in a semi-runaway state but not completely out of control; if the speed is greater than or equal to the maximum braking speed at the moment, the vehicle is in a complete out-of-control state, and the central processing unit sends a signal to control the operation of the bouncing air bag actuator.
As shown in fig. 4, the airbag sensor in the pop-up airbag actuator receives an operation signal from the cpu, and is connected to the circuit of the igniter, the ignition electrode in the igniter ignites the gas generating agent in the inflator, the gas generating agent in the inflator is rapidly combusted to generate nitrogen, and 10ms of the nitrogen is charged into the pop-up airbag and reaches the bounce threshold value of the cab, so that the pop-up airbag is ready to be popped up. The cab bounce critical value is combined with the inflation speed and the volume of the bounce air bag, the processing is converted into inflation time, the inflation time is prestored in the bounce air bag actuator or the control mechanism, and the inflation time is controlled to control the inflation quantity of the bounce air bag.
S7Control strategy for bounce
After the data acquisition mechanism acquires the cargo collision information, signals are transmitted to the central processing unit of the control mechanism in real time, the control mechanism immediately judges that the truck is in a dangerous state, the control mechanism controls the bouncing air bag to carry out secondary inflation through the bouncing air bag actuator, and the cab is bounced after the bouncing air bag expands, so that the driver protection is realized.
As shown in fig. 5 and 6, after the vehicle encounters sudden unexpected braking, due to the large inertia of the steel material, the upper half part of the steel material can slide forward and even pass through the cab 1; when the pop-up airbag 2 is activated, the cab 1 is popped up, so that the driver is protected under the steel material, and the steel material passes through the cab but does not injure the driver.
When goods with large inertia such as steel materials, pipes and the like are transported by a truck, the control mechanism starts the actuating mechanism in an emergency braking state, and selects to start the safety air bag or simultaneously start the bounce air bag according to the grade of the emergency state, when the braking condition is serious, the bounce air bag is started to bounce the cab forward, so that a driver is transferred to a relatively lower position, the goods on the upper part in the carriage pass through the upper part of the driver when moving forward, the risk that the driver is scratched by the goods and even collides is avoided, the driver is protected, and the safety of personnel in the transportation process is improved.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. Truck driver emergency braking protection device uses with the vehicle control unit cooperation of freight train, including data acquisition mechanism, data acquisition mechanism signal connection to control mechanism with vehicle control unit, control mechanism with vehicle control unit's output still is connected with actuating mechanism, its characterized in that:
the data acquisition mechanism acquires cargo weight information, brake pedal state information, braking distance information during emergency braking of the truck, truck running speed information and cargo collision information to form acquired information, and transmits the acquired information to the control mechanism and the whole vehicle controller in real time, wherein the brake pedal state information comprises pedal angular displacement information and pedal stress information;
standard information is arranged in the control mechanism, and the acquired information is received in real time; the control mechanism compares partial information of the acquired information with the standard information and judges whether to drive the execution mechanism to act or not according to a comparison result; when the actuator is determined to be driven to act, a corresponding control command is generated and transmitted to the actuator;
the execution mechanism receives control commands of the control mechanism and the vehicle control unit and generates corresponding actions according to the control commands;
the actuating mechanism comprises an air bag arranged in a cab, an air bag actuator which is correspondingly arranged in the cab and used in a matched mode, the air bag actuator is connected to the control end of the vehicle control unit, the actuating mechanism further comprises a bouncing air bag arranged below the cab, the bouncing air bag actuator which is arranged in the bouncing air bag and used in a matched mode is arranged, and the bouncing air bag actuator is connected to the control mechanism.
2. A truck driver emergency brake protection device as defined in claim 1, wherein: the data acquisition mechanism comprises a weight sensor forming the weight information of the goods, the weight sensor is arranged and installed below a bottom plate of the boxcar, and the weight sensor is connected to the input end of the control mechanism;
the pedal travel sensor forms the angular displacement information of the pedal, the pedal force sensor forms the force information of the pedal, the pedal travel sensor and the pedal force sensor are respectively arranged and installed below a brake pedal, and the pedal travel sensor and the pedal force sensor are respectively connected to the input end of the control mechanism;
the braking distance sensor is arranged on a chassis circuit of the truck and is connected to the input end of the control mechanism;
the speed sensor is arranged on a hub of the truck and connected to the input end of the whole vehicle controller;
and the collision sensor is arranged on a front protective guard of a carriage of the truck and is connected to the input end of the control mechanism.
3. A truck driver emergency brake protection device as defined in claim 1, wherein: the control mechanism comprises a central processing unit, and the central processing unit is provided with a storage unit for setting and storing the standard information and an analysis unit for comparing data.
4. A truck driver emergency brake protection device as defined in claim 1, wherein: the bounce air bag actuator is structurally corresponding to the safety air bag actuator; the bounce airbag actuator comprises an airbag sensor, an igniter and an inflator, and an inflation end of the inflator is communicated to the bounce airbag.
5. A method of protecting a truck driver emergency brake protection device as defined in claim 1, wherein: comprises the following steps of (a) carrying out,
S1standard information setting
Acquiring the corresponding rated load capacity of the truck according to the model of the truck, inputting and storing a rated load value into the control mechanism, and carrying out load grading on the load of the truck through the control mechanism;
setting corresponding maximum braking distance and maximum braking speed corresponding to each load grade in the control mechanism, and setting pedal angular displacement limit and pedal stress limit values in the control mechanism;
S2load grading
The data acquisition mechanism is used for acquiring the cargo weight information of the truck and transmitting the cargo weight information to the control mechanism, and the control mechanism is used for comparing the cargo weight information with the rated load capacity to determine the current load level of the truck;
S3and judging the braking state of the truck
S3-1The data acquisition mechanism acquires the pedal angular displacement information and the pedal stress information in real time and combines the pedal angular displacement information and the pedal stress informationInformation is transmitted to the control mechanism;
S3-2comparing the pedal angular displacement information with the pedal angular displacement limit and comparing the pedal stress information with the pedal stress limit value of the control mechanism;
S3-3when the pedal angular displacement information is smaller than the pedal angular displacement limit or the pedal stress information is smaller than the pedal stress limit, the control mechanism judges that the truck is in a normal braking state and does not select a braking control strategy;
when the pedal angular displacement information is not less than the pedal angular displacement limit and the pedal stress information is not less than the pedal stress limit value, the control mechanism judges that the truck is in an emergency braking state;
S4emergency brake control strategy
S4-1The control mechanism calls the correspondingly set maximum braking distance and maximum braking speed according to the determined load grade;
S4-2the data acquisition mechanism acquires the braking distance information and the running speed information in real time and respectively transmits the braking distance information and the running speed information to the control mechanism, and the control mechanism forms the following judgment according to the comparison between the braking distance information and the maximum braking distance:
when the braking distance information is smaller than the maximum braking distance, the control mechanism judges that the truck enters an emergency braking state, and the control mechanism generates an emergency braking state control signal to control the execution mechanism to execute S5The strategy of the step;
when the braking distance information is larger than or equal to the maximum braking distance, the control mechanism judges that the truck has the sign of out-of-control, and the S step is started4-3A step of;
S4-3the control mechanism compares the running speed information with the maximum braking speed;
when the running speed information is less than the maximum braking speed, the control mechanism judges that the truck enters a semi-out-of-control state, and the control mechanism generates a semi-out-of-control state control signal to control the truckSaid actuator executing S6The strategy of the step;
when the running speed information is not less than the maximum braking speed, the control mechanism judges that the truck enters a complete out-of-control state, the control mechanism generates a complete control state control signal and controls the execution mechanism to execute S6～S7The strategy of the step;
S5airbag control strategy
The control mechanism transmits an emergency braking state control signal to the vehicle control unit, and the vehicle control unit starts the safety air bag through the safety air bag actuator after receiving the signal to realize driver protection;
S6control strategy for preparing for bounce
The control mechanism controls the bounce air bag to inflate through the bounce air bag actuator, so that the air pressure in the bounce air bag reaches a cab bounce critical value;
S7control strategy for bounce
After the data acquisition mechanism acquires the goods collision information, signals are transmitted to the control mechanism in real time, the control mechanism immediately judges that the truck is in a dangerous state, and the control mechanism controls the bouncing air bag to carry out secondary inflation through the bouncing air bag actuator to bounce the cab, so that the driver is protected.
6. A method of protecting a truck driver emergency brake protection device as defined in claim 5, wherein: when the control mechanism divides the load of the truck into four load grades, the load is divided into four load grades, namely 40% and less load, 60% and less load, 80% and less load and 100% and less load.
7. A method of protecting a truck driver emergency brake protection device as defined in claim 5, wherein: and the cab bounce critical value is combined with the inflation speed and volume of the bounce airbag, processed and converted into inflation time, and the inflation time is prestored in the bounce airbag actuator or the control mechanism.
8. A method of protecting a truck driver emergency brake protection device as defined in claim 5, wherein: an electromagnetic lock is arranged between the cab and the frame of the truck, and the electromagnetic lock is connected to the control mechanism.
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| CN113459981B (en) | 2022-05-10 |
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