CN115520012A - Hydrogen fuel cell vehicle collision detection method and system and vehicle - Google Patents
Hydrogen fuel cell vehicle collision detection method and system and vehicle Download PDFInfo
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- CN115520012A CN115520012A CN202110706024.9A CN202110706024A CN115520012A CN 115520012 A CN115520012 A CN 115520012A CN 202110706024 A CN202110706024 A CN 202110706024A CN 115520012 A CN115520012 A CN 115520012A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle
- B60K28/14—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle responsive to accident or emergency, e.g. deceleration, tilt of vehicle
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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
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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
- B60R21/0132—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 responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
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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
- B60R2021/01013—Means for detecting collision, impending collision or roll-over
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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Abstract
The invention relates to a collision detection method, a system and a vehicle of a hydrogen fuel cell vehicle, wherein the method comprises the steps of detecting an acceleration value and a hydrogen concentration value of the vehicle in real time, recording the duration of the acceleration value which is greater than a set acceleration threshold value, and sensing the impact force when the collision occurs; and if the acceleration value is greater than or equal to the set acceleration threshold value, determining the fault grade of the vehicle based on the duration, the set time threshold value, the hydrogen concentration value and the set concentration threshold value, and if the acceleration value is less than the set acceleration threshold value, determining that the vehicle has no fault. According to the invention, the accuracy of the collision detection result can be improved.
Description
Technical Field
The invention belongs to the technical field of hydrogen fuel cell vehicles, and particularly relates to a collision detection method and system for a hydrogen fuel cell vehicle and the vehicle.
Background
With the popularization of fuel cells, the application of fuel cells to vehicles is becoming more important, especially to hydrogen fuel cells among fuel cells. Due to the characteristics of flammability and explosiveness of hydrogen, collision protection is also required by the hydrogen environment, for example, GB26990 "technical conditions for hydrogen systems on fuel cell electric vehicles" 4.2.9 requires that "when a vehicle collides, a main shut-off valve should be immediately (automatically) closed according to the designed collision level to shut off the fuel supply to a pipeline. For example, a truck as an operating vehicle has a high average vehicle speed (e.g., 70-90 km/h) during operation, and to ensure operating efficiency, the operating time of the truck is often selected from 2 to 5 am, but a driver master is prone to fatigue driving during the operating time, so that a collision accident is more likely to occur during the operating time, and therefore, the application of the hydrogen fuel cell to the truck (particularly after the collision) is more likely to have a safety hazard.
At the present stage, a hydrogen fuel cell vehicle collision protection device in the market is mainly an acceleration sensor, and a Chinese invention patent application publication No. CN112298087A discloses a hydrogen fuel cell vehicle collision safety control system and a method, wherein the acceleration sensor is used for detecting a vehicle acceleration signal and transmitting the acceleration signal to an airbag controller, the airbag controller judges whether a collision occurs according to the acceleration signal and transmits the collision signal to a hydrogen supply system controller, the hydrogen supply system controller receives the collision signal and controls the opening and closing of a hydrogen bottle opening electromagnetic valve, however, the acceleration collision sensor is used alone to judge the collision condition, and the false alarm condition is easy to occur. The invention discloses a moving collision contact sensing device in Chinese invention patent application with application publication number CN1908607A, which automatically takes corresponding measures according to collision contact information (including collision occurrence and collision position information) sensed by the moving collision contact sensing device, but the detection result is not accurate because the collision sensor is the collision of a detection point.
Disclosure of Invention
The invention provides a method and a system for detecting collision of a hydrogen fuel cell vehicle and the vehicle, which are used for solving the problem of inaccurate collision detection of the existing hydrogen fuel cell vehicle.
In order to solve the above technical problem, the present invention provides a hydrogen fuel cell vehicle collision detection method, including: detecting an acceleration value and a hydrogen concentration value of a vehicle in real time, recording the duration time that the acceleration value is greater than a set acceleration threshold value, and sensing the impact force when the vehicle collides; comparing an impact force with an impact force threshold, if the impact force is greater than or equal to the impact force threshold, determining that the vehicle has a fault, if the impact force is less than the impact force threshold, comparing the acceleration value with a set acceleration threshold, if the acceleration value is greater than or equal to the set acceleration threshold, determining a fault level of the vehicle based on a duration, a set time threshold, a hydrogen concentration value and a set concentration threshold, and if the acceleration value is less than the set acceleration threshold, determining that the vehicle does not have a fault.
The beneficial effects of the above technical scheme are: when the vehicle collides, the impact force, the acceleration value, the duration and the hydrogen concentration value which are related parameters can reflect the collision fault degree in different degrees, so that whether the vehicle has faults or not is determined based on the comprehensive comparison of the impact force, the acceleration value, the duration and the hydrogen concentration value, and the accuracy of the detection result can be improved.
Further, in order to more accurately know the degree of the collision failure of the vehicle, the invention provides a collision detection method of a hydrogen fuel cell vehicle, which comprises the following steps of determining that the vehicle has a failure if the impact force is greater than or equal to the impact force threshold value: if the impact force is larger than or equal to the impact force threshold, comparing the acceleration value with the set acceleration threshold, if the acceleration value is larger than or equal to the set acceleration threshold, determining that the vehicle has a primary fault, and if the acceleration value is smaller than the set acceleration threshold, determining that the vehicle has a secondary fault.
Further, in order to more accurately know the collision failure degree of the vehicle, the invention provides a collision detection method of a hydrogen fuel cell vehicle, which comprises the following steps of determining the failure grade of the vehicle based on the duration, the set time threshold, the hydrogen concentration value and the set concentration threshold: the set time threshold includes a first set time threshold and a second set time threshold, the first set time threshold is smaller than the second set time threshold, the duration is compared with the first set time threshold, if the duration is smaller than the first set time threshold, a failure level of the vehicle is determined based on the hydrogen concentration value and the set concentration threshold, if the duration is greater than or equal to the first set time threshold, the failure level of the vehicle is determined based on the duration, the second set time threshold, the hydrogen concentration value and the set concentration threshold.
Further, in order to more accurately know the degree of collision failure of a vehicle, the present invention provides a hydrogen fuel cell vehicle collision detection method, including a step of determining a failure class of the vehicle based on the hydrogen concentration value and a set concentration threshold value, including: the set concentration threshold comprises a first set concentration threshold and a second set concentration threshold, the first set concentration threshold is smaller than the second set concentration threshold, the hydrogen concentration value is compared with the first set concentration threshold, if the hydrogen concentration value is smaller than the first set concentration threshold, it is determined that the vehicle has a tertiary fault, if the hydrogen concentration value is larger than or equal to the first set concentration threshold, the hydrogen concentration value is compared with the second set concentration threshold, if the hydrogen concentration value is smaller than the second set concentration threshold, it is determined that the vehicle has a secondary fault, and if the hydrogen concentration value is larger than or equal to the second set concentration threshold, it is determined that the vehicle has a primary fault.
Further, in order to more accurately know the degree of collision failure of the vehicle, the present invention provides a hydrogen fuel cell vehicle collision detection method including the step of determining the level of failure of the vehicle based on the duration, a second set time threshold, the hydrogen concentration value, and the set concentration threshold, including: and comparing the duration with a second set time threshold, if the duration is less than the second set time threshold, comparing the hydrogen concentration value with a first set concentration threshold, if the hydrogen concentration value is less than the first set concentration threshold, determining that the vehicle has a secondary fault, if the hydrogen concentration value is greater than or equal to the first set concentration threshold, determining that the vehicle has a primary fault, and if the duration is greater than or equal to the second set time threshold, determining that the vehicle has a primary fault.
Further, in order to reduce the influence of slight collision on the vehicle operation and timely and effectively capture the collision condition influencing the operation safety, the invention provides a collision detection method for a hydrogen fuel cell vehicle, which comprises the steps of shutting off hydrogen and shutting down a fuel cell of the vehicle if the vehicle has a primary fault, shutting off the hydrogen of the vehicle if the vehicle has a secondary fault, and reminding the vehicle if the vehicle has a tertiary fault.
In order to solve the technical problems, the invention provides a collision detection system of a hydrogen fuel cell vehicle, which comprises an acceleration sensor, a contact sensor, a hydrogen concentration sensor and a controller, wherein the acceleration sensor is used for detecting an acceleration value of the vehicle in real time and transmitting the acceleration value to the controller, the contact sensor is used for sensing an impact force when the vehicle collides and comparing the impact force with an impact force threshold value, if the impact force is greater than the impact force threshold value, the contact sensor is closed and outputs a closing signal, the hydrogen concentration sensor is used for detecting the hydrogen concentration value in real time and transmitting the hydrogen concentration value to the controller, the controller records the duration of the acceleration value greater than a set acceleration threshold value, if the controller receives the closing signal, the fault level of the vehicle is determined based on the acceleration value and the set acceleration threshold value, and if the closing signal is not received, the fault level of the vehicle is determined based on the acceleration value, the set acceleration threshold value, the duration, the set time threshold value, the hydrogen concentration value and the set concentration threshold value. In this case, the acceleration sensor, the contact sensor, and the hydrogen concentration sensor are coupled, and the controller determines whether the vehicle has a malfunction based on a comprehensive comparison of the closure signal, the acceleration value, the duration, and the hydrogen concentration value, whereby the accuracy of the detection result can be improved.
Further, in order to more accurately know the degree of collision failure of a vehicle, the present invention provides a hydrogen fuel cell vehicle collision detection system, including a first set time threshold and a second set time threshold, the first set time threshold being smaller than the second set time threshold, the step of determining the failure level of the vehicle based on the acceleration value, the set acceleration threshold, the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold includes: comparing the acceleration value with the set acceleration threshold value, if the acceleration value is greater than or equal to the set acceleration threshold value, comparing the duration with the first set time threshold value, if the duration is less than the first set time threshold value, determining a fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold value, if the duration is greater than or equal to the first set time threshold value, comparing the duration with a second set time threshold value, if the duration is less than the second set time threshold value, determining the fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold value, and if the duration is greater than or equal to the second set time threshold value, determining that the vehicle has a primary fault.
Further, in order to fully utilize a controller of a vehicle to determine whether the vehicle has a fault, the invention provides a hydrogen fuel cell vehicle collision detection system, which comprises a vehicle controller and a hydrogen controller, wherein the hydrogen controller receives the hydrogen concentration value, compares the hydrogen concentration value with a set concentration threshold value, and transmits a comparison result to the vehicle controller, if the vehicle controller does not receive the closing signal, the vehicle controller determines a fault level of the vehicle based on the acceleration value, the set acceleration threshold value, the duration, the set time threshold value, the comparison result of the hydrogen concentration value and the set concentration threshold value, and if the vehicle controller receives the closing signal, the acceleration value is compared with the set acceleration threshold value, and the fault level of the vehicle is determined.
The invention also provides a vehicle which comprises a fuel cell and is characterized by further comprising the hydrogen fuel cell vehicle collision detection system.
Drawings
Fig. 1 is a flowchart of a hydrogen fuel cell vehicle collision detection method of the invention;
FIG. 2 is a first schematic block diagram of a hydrogen fuel cell vehicle collision detection system of the present invention;
FIG. 3 is a functional block diagram of a hydrogen fuel cell vehicle collision detection system of the present invention;
fig. 4 is a functional block diagram iii of a hydrogen fuel cell vehicle collision detection system of the invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
Hydrogen fuel cell vehicle collision detection method embodiment:
the embodiment provides a hydrogen fuel cell vehicle collision detection method. The hydrogen fuel cell vehicle collision detection method may be simply referred to as a collision detection method. The collision detection method according to the embodiment can improve the accuracy of the detection result.
Fig. 1 is a flowchart of a hydrogen fuel cell vehicle collision detection method of the invention. In the present embodiment, as shown in fig. 1, the collision detection method includes detecting an acceleration value, a duration, and a hydrogen concentration value. Specifically, the detecting the acceleration value may be detecting the acceleration value of the vehicle in real time. The detecting the hydrogen concentration value may be detecting a hydrogen concentration value of the vehicle in real time. In this case, the acceleration value and the hydrogen concentration value can be acquired in time, whereby the time for determining whether the vehicle has a failure can be shortened. The acceleration value in the present embodiment may be detected by an acceleration sensor of the vehicle. The hydrogen concentration value may be detected by a hydrogen concentration sensor.
In the present embodiment, the duration refers to a time during which the detected acceleration value is greater than the set acceleration threshold value. Wherein the set acceleration threshold is adjustable. The set acceleration threshold value can be set correspondingly according to the actual working conditions of different types of vehicles. Therefore, the device can adapt to actual collision situations of different types of vehicles. For example, for a truck with a load of 36t, the set acceleration threshold may be, but is not limited to, 2.2g.
In the present embodiment, as shown in fig. 1, the collision detection method includes determining whether the contact sensor is closed. Specifically, the closing condition of the contact sensor may be determined based on the impact force at the time of collision. The contact sensor may sense an impact force at the time of a collision and compare the impact force to an impact force threshold.
In this embodiment, if the impact force is greater than or equal to the impact force threshold, in which case the contact sensor is closed, it may be determined that there is a malfunction in the vehicle. If the impact force is less than the impact force threshold, in which case the contact sensor is not closed, then a determination may be made as to whether the vehicle is malfunctioning based on the acceleration value, duration, and hydrogen concentration value. In this case, the collision detection method of the present embodiment can determine whether the vehicle has a failure based on the comprehensive comparison of the impact force, the acceleration value, the duration, and the hydrogen concentration value, whereby the accuracy of the detection result can be improved.
In this embodiment, if the impact force is greater than or equal to the impact force threshold, the step of determining that the vehicle has a fault may include: if the impact force is greater than or equal to the impact force threshold (i.e., the contact sensor is closed), the acceleration value may be compared to a set acceleration threshold, if the acceleration value is greater than or equal to the set acceleration threshold, it is determined that a primary fault exists with the vehicle, and if the acceleration value is less than the set acceleration threshold, it is determined that a secondary fault exists with the vehicle (see fig. 1). Thus, the degree of the collision failure of the vehicle can be more accurately known.
In this embodiment, the contact sensor is not closed, and the step of determining whether the vehicle has a fault based on the acceleration value, the duration, and the hydrogen concentration value may include: if the impact force is less than the impact force threshold (i.e., the contact sensor is not closed), the acceleration value may be compared to a set acceleration threshold, if the acceleration value is greater than or equal to the set acceleration threshold, a fault level of the vehicle may be determined based on the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold, and if the acceleration value is less than the set acceleration threshold, the vehicle may be free of faults (see fig. 1).
In this embodiment, the set time threshold may be one or more. The set concentration threshold may be one or more. In this case, the determination of the fault level based on one or more set time thresholds and set density thresholds can be adapted to different crash situations.
In this embodiment, when the set time threshold is plural, the set time threshold may include a first set time threshold and a second set time threshold. The first set time threshold is less than the second set time threshold. For example, for a truck with a load of 36t, the first set time threshold may be, but is not limited to, 1s. The second set time threshold may be, but is not limited to, 3s.
The step of determining the fault level of the vehicle based on the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold in the present embodiment may include: and comparing the duration with a first set time threshold, if the duration is less than the first set time threshold, determining the fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold, and if the duration is greater than or equal to the first set time threshold, determining the fault level of the vehicle based on the duration, a second set time threshold, the hydrogen concentration value and the set concentration threshold. Thus, the degree of the collision failure of the vehicle can be more accurately known.
In this embodiment, when the set density threshold is multiple, the set density threshold includes a first set density threshold and a second set density threshold, and the first set density threshold is smaller than the second set density threshold. For example, for a truck with a load of 36t, the first set concentration threshold may be, but is not limited to, 20000ppm. The second set concentration threshold may be, but is not limited to, 40000ppm.
The step of determining the failure level of the vehicle based on the hydrogen concentration value and the set concentration threshold value in the present embodiment may include: and comparing the hydrogen concentration value with a first set concentration threshold value, and if the hydrogen concentration value is smaller than the first set concentration threshold value, determining that the vehicle has three-level faults. If the hydrogen concentration value is greater than or equal to the first set concentration threshold value, comparing the hydrogen concentration value with a second set concentration threshold value, and if the hydrogen concentration value is less than the second set concentration threshold value, determining that the vehicle has a secondary fault. If the hydrogen concentration value is greater than or equal to the second set concentration threshold value, it is determined that the vehicle has a primary fault (see fig. 1). Thus, the degree of the collision failure of the vehicle can be more accurately known.
In the present embodiment, the step of determining the fault level of the vehicle based on the duration, the second set time threshold, the hydrogen concentration value, and the set concentration threshold may include: and comparing the duration with a second set time threshold, and determining that the vehicle has a primary fault if the duration is greater than or equal to the second set time threshold. If the duration time is less than a second set time threshold, comparing the hydrogen concentration value with a first set concentration threshold, if the hydrogen concentration value is less than the first set concentration threshold, determining that the vehicle has a secondary fault, and if the hydrogen concentration value is greater than or equal to the first set concentration threshold, determining that the vehicle has a primary fault. Thus, the degree of the collision failure of the vehicle can be more accurately known.
In this embodiment, the fault classes may include primary, secondary, or tertiary faults. If there is a primary fault with the vehicle, the vehicle shuts down the hydrogen and the fuel cell shuts down. If the vehicle has a secondary fault, the vehicle shuts down the hydrogen. And if the vehicle has three-level faults, the vehicle reminds. Under the condition, different vehicle reactions are made according to different fault levels, so that the influence of slight collision on vehicle operation can be reduced, and the collision condition influencing the operation safety can be timely and effectively captured.
In addition, in this embodiment, if the vehicle has a primary fault or a secondary fault, the vehicle may prompt in addition to the vehicle reaction. The reminding modes of the primary fault, the secondary fault or the tertiary fault are different. The reminding manner includes but is not limited to one or more of a light reminding manner, a sound reminding manner and a vibration reminding manner.
Embodiments of the present invention are not limited thereto, and in some embodiments, the set acceleration threshold may be plural. In other embodiments, the set time threshold may be three or more. The set concentration threshold may be three or more. The failure levels may be four or more. For example, when n acceleration thresholds, n time thresholds, or n density thresholds are set, n +1 failure levels may be set, where n is a natural number. The value of n can be set based on the requirements of different types of vehicles. In this case, different vehicles can better meet different protection responses to different collision conditions, and therefore, the fuel cell vehicle protection device can be better suitable for being used in complex collision conditions (or collision working conditions) of the fuel cell vehicle.
Hydrogen fuel cell vehicle collision detection system embodiment:
the embodiment discloses a hydrogen fuel cell vehicle collision detection system. The hydrogen fuel cell vehicle collision detection system may be simply referred to as a collision detection system. The collision detection system based on the embodiment can improve the accuracy of the detection result. With the collision detection system of the present embodiment, it is possible to realize the hydrogen fuel cell vehicle collision detection method described in the method embodiment of the invention.
Fig. 2 is a functional block diagram i of a hydrogen fuel cell vehicle collision detection system of the invention. Fig. 3 is a functional block diagram ii of the hydrogen fuel cell vehicle collision detection system of the present invention. Fig. 4 is a functional block diagram iii of a hydrogen fuel cell vehicle collision detection system of the invention. In the present embodiment, as shown in fig. 2, the hydrogen fuel cell vehicle collision detection system 1 may include an acceleration sensor 10, a contact sensor 20, a hydrogen concentration sensor 30, and a controller 40.
In the present embodiment, the acceleration sensor 10 may be used to detect the acceleration value of the vehicle in real time. That is, the acceleration sensor 10 can detect the instantaneous acceleration value of the vehicle.
In this embodiment, the contact sensor 20 may be configured to sense an impact force when a collision occurs and compare the impact force with an impact force threshold, and the contact sensor 20 closes and outputs a close signal if the impact force is greater than the impact force threshold.
In this embodiment, the set acceleration threshold is adjustable. The set acceleration threshold value can be set correspondingly according to the actual working conditions of different types of vehicles. Therefore, the device can adapt to actual collision situations of different types of vehicles.
In the present embodiment, the contact sensor 20 may be one or more. A plurality of contact sensors may be provided at locations where the vehicle is susceptible to collision based on actual demand. For example, a plurality of contact sensors may be provided at the head and tail of the vehicle.
In this embodiment, the hydrogen concentration sensor 30 may be used to detect the hydrogen concentration value in real time and transmit it to the controller 40. Wherein the hydrogen concentration value detected by the hydrogen concentration sensor 30 is transmitted to the controller 40 in the form of a hydrogen concentration signal.
In this embodiment, the controller 40 may record the duration of the acceleration value being greater than the set acceleration threshold. The duration is the time during which the detected acceleration value is greater than the set acceleration threshold.
In this embodiment, if the close signal is received, the controller 40 may determine a fault level of the vehicle based on the acceleration value and the set acceleration threshold. If the close signal is not received, the controller 40 may determine a fault level of the vehicle based on the acceleration value, the set acceleration threshold, the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold. In this case, the acceleration sensor 10, the contact sensor 20, and the hydrogen concentration sensor 30 are coupled to complement the functions of the components, and the controller 40 determines whether the vehicle has a fault based on the comprehensive comparison of the closing signal, the acceleration value, the duration, and the hydrogen concentration value, thereby improving the accuracy of the detection result.
In this embodiment, the set time threshold may be one or more. The set concentration threshold may be one or more. Reference may be made to corresponding descriptions in the method embodiments, which are not described herein again. The set concentration threshold may be set in the controller 40.
In this embodiment, when the set time threshold is plural, the set time threshold may include a first set time threshold and a second set time threshold. The first set time threshold is less than the second set time threshold.
The step of determining the fault level of the vehicle based on the acceleration value, the set acceleration threshold value, the duration, the set time threshold value, the hydrogen concentration value, and the set concentration threshold value in the present embodiment may include: the acceleration value is compared to a set acceleration threshold, and if the acceleration value is greater than or equal to the set acceleration threshold, the controller 40 may compare the duration to a first set time threshold. If the duration is less than the first set time threshold, the controller 40 may determine a fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold. If the duration is greater than or equal to the first set time threshold, the controller 40 may compare the duration to a second set time threshold. If the duration is less than the second set time threshold, the controller 40 may determine a fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold, and if the duration is greater than or equal to the second set time threshold, determine that the vehicle has a primary fault. Thus, the degree of the collision failure of the vehicle can be more accurately known. The method for determining whether the vehicle has a fault is described in detail in the above embodiment of the method, and for those skilled in the art, the determination manner of the controller 40 may be known according to the collision detection method, and will not be described herein again.
In this embodiment, the fault classes may include primary, secondary, or tertiary faults. If there is a primary fault with the vehicle, the vehicle shuts down the hydrogen and the fuel cell shuts down. If the vehicle has a secondary fault, the vehicle shuts down the hydrogen. And if the vehicle has three-level faults, the vehicle reminds. In this case, different vehicle reactions (i.e., vehicle actions) are performed according to different fault levels, so that the influence of a light collision on the vehicle operation can be reduced, and the collision condition influencing the operation safety can be timely and effectively captured.
In the present embodiment, as shown in fig. 3, the controller 40 may include a vehicle controller 41 and a hydrogen controller 42. In this case, the collision detecting system 1 is formed by using the acceleration sensor 10, the contact sensor 20, and the hydrogen concentration sensor 30 in combination with the vehicle controller 41 and the hydrogen controller 42 to achieve control of hydrogen system parts and vehicle control. Thus, it is possible to determine whether or not the vehicle has a failure by making full use of the controller of the vehicle itself.
Specifically, in the present embodiment, the vehicle control unit 41 may record a duration in which the acceleration value is greater than the set acceleration threshold value. The vehicle control unit 41 may acquire an acceleration value detected by the acceleration sensor 10 and a closing signal output by the contact sensor 20. The hydrogen controller 42 may receive the hydrogen concentration value (i.e., receive the hydrogen concentration signal), compare the hydrogen concentration value with a set concentration threshold, and transmit the comparison result to the vehicle controller 41. The set concentration threshold may be set in the hydrogen controller 42.
In this embodiment, if the close signal is not received, the vehicle controller 41 may determine the failure level of the vehicle based on the comparison result of the acceleration value, the set acceleration threshold, the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold, and if the close signal is received, the vehicle controller 41 may compare the acceleration value with the set acceleration threshold to determine the failure level of the vehicle. In this case, whether the vehicle has a failure is determined by the vehicle controller 41 and the hydrogen controller 42, and thus, by the processing of the vehicle controller 41 and the hydrogen system controller 42, it is possible to realize a vehicle passive safeguard action that differs (for example, cuts off the supply of hydrogen gas) in response to different collision situations.
In addition, the number of setting acceleration threshold values, setting time threshold values, setting density threshold values, and failure levels may not be limited to those recited in the present embodiment. Reference may be made to corresponding descriptions in the method embodiments, which are not described herein again.
In the present embodiment, as shown in fig. 4, the collision detecting system 1 may further include an in-vehicle hydrogen system 50. The on-board hydrogen system 50 may provide hydrogen gas to a vehicle. If the vehicle has primary failure or secondary failure, the vehicle controller 41 controls to cut off the power supply of the cylinder valve of the vehicle-mounted hydrogen system 50 so as to cut off the hydrogen. In this embodiment, if there is a primary failure in the vehicle, the vehicle controller 41 cuts off the vehicle power source to shut down the fuel cell.
The embodiment of the vehicle is as follows:
the present embodiment also provides a vehicle that may include a fuel cell and a hydrogen fuel cell vehicle collision detection system in the system embodiment of the invention. Therefore, different vehicle reactions can be made by the vehicle based on different collision conditions, the influence of slight collision on the vehicle running can be reduced, and the collision condition influencing the running safety can be captured effectively in time.
The vehicle in the present embodiment includes, but is not limited to, transportation automobiles such as cars, buses, trucks, and the like.
Claims (10)
1. A hydrogen fuel cell vehicle collision detection method characterized by comprising:
detecting an acceleration value and a hydrogen concentration value of a vehicle in real time, recording the duration time that the acceleration value is greater than a set acceleration threshold value, and sensing the impact force when the vehicle collides;
comparing an impact force with an impact force threshold, if the impact force is greater than or equal to the impact force threshold, determining that the vehicle has a fault, if the impact force is less than the impact force threshold, comparing the acceleration value with the set acceleration threshold, if the acceleration value is greater than or equal to the set acceleration threshold, determining a fault level of the vehicle based on a duration, a set time threshold, a hydrogen concentration value and a set concentration threshold, and if the acceleration value is less than the set acceleration threshold, determining that the vehicle has no fault.
2. The hydrogen fuel cell vehicle collision detection method according to claim 1, wherein the step of determining that the vehicle is malfunctioning if the impact force is greater than or equal to the impact force threshold value includes: if the impact force is larger than or equal to the impact force threshold, comparing the acceleration value with the set acceleration threshold, if the acceleration value is larger than or equal to the set acceleration threshold, determining that the vehicle has a primary fault, and if the acceleration value is smaller than the set acceleration threshold, determining that the vehicle has a secondary fault.
3. The hydrogen fuel cell vehicle collision detection method according to claim 2, wherein the step of determining the level of failure of the vehicle based on the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold includes: the set time threshold includes a first set time threshold and a second set time threshold, the first set time threshold is smaller than the second set time threshold, the duration is compared with the first set time threshold, if the duration is smaller than the first set time threshold, a failure level of the vehicle is determined based on the hydrogen concentration value and the set concentration threshold, if the duration is greater than or equal to the first set time threshold, the failure level of the vehicle is determined based on the duration, the second set time threshold, the hydrogen concentration value and the set concentration threshold.
4. The hydrogen fuel cell vehicle collision detection method according to claim 3, characterized in that the step of determining the level of failure of the vehicle based on the hydrogen concentration value and a set concentration threshold value includes: the set concentration threshold value comprises a first set concentration threshold value and a second set concentration threshold value, the first set concentration threshold value is smaller than the second set concentration threshold value, the hydrogen concentration value is compared with the first set concentration threshold value, if the hydrogen concentration value is smaller than the first set concentration threshold value, it is determined that the vehicle has a tertiary fault, if the hydrogen concentration value is larger than or equal to the first set concentration threshold value, the hydrogen concentration value is compared with the second set concentration threshold value, if the hydrogen concentration value is smaller than the second set concentration threshold value, it is determined that the vehicle has a secondary fault, and if the hydrogen concentration value is larger than or equal to the second set concentration threshold value, it is determined that the vehicle has a primary fault.
5. The hydrogen fuel cell vehicle collision detection method according to claim 4, characterized in that the step of determining the level of failure of the vehicle based on the duration, a second set time threshold, the hydrogen concentration value, and the set concentration threshold includes: and comparing the duration with a second set time threshold, if the duration is less than the second set time threshold, comparing the hydrogen concentration value with a first set concentration threshold, if the hydrogen concentration value is less than the first set concentration threshold, determining that the vehicle has a secondary fault, if the hydrogen concentration value is greater than or equal to the first set concentration threshold, determining that the vehicle has a primary fault, and if the duration is greater than or equal to the second set time threshold, determining that the vehicle has a primary fault.
6. The hydrogen fuel cell vehicle collision detection method according to claim 4 or 5, characterized in that if there is a primary failure in the vehicle, the vehicle shuts off hydrogen and the fuel cell is shut down, if there is a secondary failure in the vehicle, the vehicle shuts off hydrogen, if there is a tertiary failure in the vehicle, the vehicle reminds.
7. A hydrogen fuel cell vehicle collision detection system, characterized by comprising:
acceleration sensor, contact pick-up, hydrogen concentration sensor and controller, acceleration sensor is used for the acceleration value of real-time detection vehicle and transmits extremely the controller, contact pick-up is used for the sensing impact force when bumping and compares impact force and impact force threshold value, if the impact force is greater than when the impact force threshold value contact pick-up closure and output closure signal, hydrogen concentration sensor is used for real-time detection hydrogen concentration value and transmits extremely the controller, the controller record the acceleration value is greater than the duration of setting for the acceleration threshold value, if the controller receives closure signal, then based on acceleration value and setting for the acceleration threshold value, confirm the trouble grade of vehicle, if do not receive closure signal, then based on acceleration value, set for acceleration threshold value, duration, set for time threshold value, hydrogen concentration value and set for the concentration threshold value, confirm the trouble grade of vehicle.
8. The hydrogen fuel cell vehicle collision detection system according to claim 7,
the set time threshold includes a first set time threshold and a second set time threshold, the first set time threshold being less than the second set time threshold, and the step of determining the fault level of the vehicle based on the acceleration value, the set acceleration threshold, the duration, the set time threshold, the hydrogen concentration value, and the set concentration threshold includes: comparing the acceleration value with the set acceleration threshold value, if the acceleration value is greater than or equal to the set acceleration threshold value, comparing the duration with the first set time threshold value, if the duration is less than the first set time threshold value, determining a fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold value, if the duration is greater than or equal to the first set time threshold value, comparing the duration with a second set time threshold value, if the duration is less than the second set time threshold value, determining the fault level of the vehicle based on the hydrogen concentration value and the set concentration threshold value, and if the duration is greater than or equal to the second set time threshold value, determining that the vehicle has a primary fault.
9. The hydrogen fuel cell vehicle collision detection system according to claim 8,
the controller comprises a vehicle control unit and a hydrogen controller, the hydrogen controller receives the hydrogen concentration value, compares the hydrogen concentration value with a set concentration threshold value, and transmits a comparison result to the vehicle control unit, if the vehicle control unit does not receive the closing signal, the fault level of the vehicle is determined based on the acceleration value, the set acceleration threshold value, the duration, the set time threshold value, the hydrogen concentration value and the comparison result of the set concentration threshold value, and if the closing signal is received, the acceleration value is compared with the set acceleration threshold value, and the fault level of the vehicle is determined.
10. A vehicle including a fuel cell, characterized by further comprising the hydrogen fuel cell vehicle collision detection system according to any one of claims 7 to 9.
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