Vehicle collision sensor, collision response method and system

Abstract

The present invention discloses a vehicle collision sensor, collision response method, and system. The vehicle collision sensor includes a first permanent magnet, a second permanent magnet, and a conductor rod. The first permanent magnet and the second permanent magnet are both fixed to a first component on the vehicle body; the conductor rod is fixed to a second component on the vehicle body, and the conductor rod is located in the magnetic field formed between the first permanent magnet and the second permanent magnet; when a vehicle collision causes the relative position of the first component and the second component to change, a motional electromotive force can be generated in the conductor rod. The permanent magnetic field formed by the first permanent magnet and the second permanent magnet, in conjunction with the conductor rod, constitutes a collision sensor. This does not require continuous consumption of electrical energy, helps save vehicle energy consumption, and improves the endurance of new energy vehicles.

Description

Technical Field

[0001] The present invention relates to the field of vehicle collision technology, and in particular to a vehicle collision sensor, a collision response method and a system. Background Art

[0002] The collision sensor is the control signal input device in the airbag system. Its function is to detect the intensity signal of the car collision by the collision sensor and input the signal into the airbag computer. The airbag computer determines whether to detonate the inflation element to inflate the airbag based on the signal of the collision sensor.

[0003] Existing collision sensors are mostly magnetic, using coils to generate a magnetic field. The magnetic sensor detects changes in this field to achieve collision detection. Magnetic collision sensors typically require a stable DC power supply, placing high demands on power supply performance. Furthermore, the continuous power consumption required to generate the magnetic field during operation increases energy consumption for new energy vehicles, impacting their range. Summary of the Invention

[0004] The problem to be solved by the present invention is to overcome the defects of the prior art and provide a vehicle collision sensor, a collision response method and a system. In the vehicle collision sensor, a permanent magnet is used to form a magnetic field, which does not require continuous consumption of electrical energy.

[0005] To solve the above technical problems, the present invention provides, on one hand, a vehicle collision sensor, comprising a first permanent magnet, a second permanent magnet, and a conductor bar, wherein the first permanent magnet and the second permanent magnet are both fixed to a first component on the vehicle body; the conductor bar is fixed to the second component on the vehicle body, and the conductor bar is located in the magnetic field formed between the first permanent magnet and the second permanent magnet; when a vehicle collision occurs, causing the relative positions of the first component and the second component to change, a motional electromotive force can be generated in the conductor bar.

[0006] In the aforementioned vehicle crash sensor, the permanent magnetic field formed by the first and second permanent magnets creates a relative magnetic field. When a collision causes the first and second components to shift relative to each other, the conductor bar moves relative to the magnetic field, cutting magnetic flux lines and generating a motional electromotive force (EMF), or voltage. This voltage signal reflects the intensity of the collision, enabling appropriate response measures to mitigate collision damage. This vehicle crash sensor utilizes a purely physical structure to generate a fixed permanent magnetic field, without affecting the vehicle's electronic components and requiring no additional power supply.

[0007] Furthermore, the first component is a front anti-collision beam, and the second component is a front bumper skin, so that the vehicle collision sensor is used to monitor a head-on collision of the vehicle.

[0008] Furthermore, the first and second permanent magnets are both flat-plate shaped and fixed to the top of the front anti-collision beam, with the plates having opposite poles arranged parallel to each other to form a magnetic field for positioning the conductor bar. Preferably, the plates of the first and second permanent magnets are perpendicular to the vertical direction of the vehicle body.

[0009] By arranging two plate-shaped permanent magnets parallel to each other on the plate surface, a uniform magnetic field with nearly vertical magnetic flux lines can be formed, so that the motional electromotive force generated by the conductor rod cutting the magnetic flux lines is directly proportional to the speed, making it easy to judge the collision intensity through the motional electromotive force.

[0010] Furthermore, the conductor bar is made of a conductive material, is in a rod shape, and is arranged transversely along the vehicle body. Preferably, the width of the conductor bar in the transverse direction of the vehicle body is equal to the width of the front anti-collision beam.

[0011] By designing the conductor rod to be arranged transversely along the vehicle body and with a width equal to the width of the front anti-collision beam 4, the effective cutting length L is increased, and a larger motional electromotive force is generated for easy monitoring.

[0012] Furthermore, a plurality of support rods are arranged on the inner side wall of the front bumper skin at lateral intervals along the vehicle body; one end of the support rod is fixedly connected to the front bumper skin, and the other end is fixedly connected to the conductor rod, so that a plurality of fixed connection points with the conductor rod are formed on the conductor rod at lateral intervals along the vehicle body.

[0013] By setting up multiple support rods at intervals along the lateral direction of the vehicle body, deformation at any position of the front bumper skin will be more fully transmitted to the conductor rod, and the generated voltage signal will be more obvious, which is convenient for monitoring.

[0014] To solve the above technical problems, the present invention further provides a collision response method of a vehicle collision sensor according to any one of claims 1 to 5, wherein during the process of generating a primary motional electromotive force in the conductor rod, the method comprises:

[0015] When motional electromotive force begins to be generated in the conductor rod, the vehicle is controlled to issue a safety warning, and a reminder is issued to the vehicle driver and the surrounding environment;

[0016] When the motional electromotive force generated in the conductor bar reaches a set voltage value or the duration reaches a set time value, the vehicle is controlled to pre-tighten the seat belt;

[0017] When the motional electromotive force generated in the conductor bar exceeds a set voltage value and the duration exceeds a set time value, the vehicle is controlled to activate the airbag at a set position.

[0018] In the above-mentioned collision response method, different responses are made according to the duration of each voltage generated and the maximum value of the generated voltage. The first level of response is when the collision just occurs, that is, when the motional electromotive force begins to be generated in the conductor rod, a safety warning is immediately issued, and a timely reminder is given to the vehicle driver and the surrounding environment; the second level is when the collision has progressed to a certain extent, that is, when the motional electromotive force reaches the set voltage value or the duration reaches the set time value, the seat belt pre-tightening continues on the basis of the safety warning; the third level is when it is detected that the collision intensity is very large, that is, both the motional electromotive force generated and the duration have exceeded the set values, and the vehicle is controlled to activate the airbags at the set positions.

[0019] Furthermore, the method also includes: controlling the vehicle to turn off the safety warning after a set time has passed since a motional electromotive force is generated in the conductor rod.

[0020] To solve the above technical problems, the present invention further provides a collision response system based on a vehicle collision sensor, characterized in that it includes:

[0021] A collection unit, used for monitoring the voltage of the conductor rod;

[0022] A control unit is configured to obtain, based on the monitoring result of the acquisition unit, the situation in which a motional electromotive force is generated in the conductor rod, and during the process of generating a motional electromotive force in the conductor rod:

[0023] When motional electromotive force begins to be generated in the conductor rod, the vehicle is controlled to issue a safety warning, and a reminder is issued to the vehicle driver and the surrounding environment;

[0024] When the motional electromotive force generated in the conductor bar reaches a set voltage value or the duration reaches a set time value, the vehicle is controlled to pre-tighten the seat belt;

[0025] When the motional electromotive force generated in the conductor bar exceeds a set voltage value and the duration exceeds a set time value, the vehicle is controlled to activate the airbag at a set position.

[0026] In summary, the above-mentioned vehicle collision sensor, collision response method and system are used. The vehicle collision sensor uses a permanent magnet to form a fixed permanent magnetic field, which has no effect on the electronic components in the vehicle and does not require additional power supply. The collision response method continuously monitors the generation process of the motional electromotive force and continuously determines the collision intensity. It responds accordingly when different conditions are met, thereby reducing collision losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the attached figure:

[0028] Figure 1 This is a schematic structural diagram of a vehicle collision sensor according to the present invention.

[0029] Figure 2 This is a schematic diagram of the conductor rod fixing structure of the vehicle collision sensor of the present invention.

[0030] In the figure, 1, first permanent magnet; 2, second permanent magnet; 3, conductor rod; 4, front anti-collision beam; 5, front bumper skin; 51, support rod. DETAILED DESCRIPTION

[0031] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0032] Example 1

[0033] Figure 1 FIG. 1 shows a vehicle collision sensor according to the present invention. Figure 1 As shown, the vehicle collision sensor includes a first permanent magnet 1, a second permanent magnet 2 and a conductor bar 3. The first permanent magnet 1 and the second permanent magnet 2 are both fixed to a first component on the vehicle body; the conductor bar 3 is fixed to a second component on the vehicle body, and the conductor bar 3 is located in the magnetic field formed between the first permanent magnet 1 and the second permanent magnet 2; when a vehicle collision causes the relative position of the first component and the second component to change, a motional electromotive force can be generated in the conductor bar 3.

[0034] When a collision occurs, causing the relative positions of the first and second components to shift, conductor bar 3 moves relative to the permanent magnetic field formed by first and second permanent magnets 1 and 2, cutting through the magnetic flux lines to generate a motional electromotive force (EMF), or voltage. This voltage signal reflects the intensity of the collision, enabling appropriate response measures to mitigate collision damage. This vehicle collision sensor utilizes a purely physical structure to generate a magnetic field, without affecting the vehicle's electronic components and requiring no additional power supply.

[0035] The first and second components on the vehicle body can be any two components on the vehicle body that can change relative position during a collision, such as the front bumper cover 5 and the front anti-collision beam 4, the rear bumper cover and the rear anti-collision beam, the fender and the fender bracket, etc. The following description uses the front anti-collision beam 4 as the first component and the front bumper cover 5 as the second component to illustrate the specific structure of the vehicle collision sensor.

[0036] A bumper is a safety device used on cars or certain vehicles to absorb and mitigate external impacts and protect the front and rear of the vehicle. It typically consists of three parts: an outer panel, a cushioning material, and a crossbeam. The outer panel, or external skin, is usually made of plastic, while the crossbeam is stamped from sheet metal into a U-shaped groove. Currently, cars often hide the anti-collision beam inside the bumper. This crossbeam is the actual anti-collision beam, which protects the occupants when the elastic material can no longer buffer energy under large impact forces. The anti-collision beam is a device designed to absorb collision energy during a collision. It consists of a main beam, an energy absorption box, and a mounting plate that connects to the vehicle. The main beam and energy absorption box are fixed to the ends of the vehicle's longitudinal beams. They effectively absorb collision energy in low-speed collisions, minimizing damage to the longitudinal beams, thereby fulfilling their protective role.

[0037] In actual fixed installation of the first permanent magnet 1, the second permanent magnet 2 and the conductor rod 3, the spatial arrangement between the bumper skin 5 and the top of the front anti-collision beam 4 is different due to different vehicle models. When modifying the vehicle collision sensor on an existing vehicle, it can be flexibly arranged according to actual conditions. When developing a new vehicle model, the location for installing the vehicle sensor can be reserved in advance during the design.

[0038] like Figure 1 As shown, the first permanent magnet 1 and the second permanent magnet 2 are both flat-plate-shaped and fixed to the top of the front bumper beam 4. Their opposite poles are arranged parallel and face each other, forming a magnetic field for the conductor bar 3. For ease of placement, the first and second permanent magnets 1 and 2 can be positioned perpendicular to the vertical direction of the vehicle body. The conductor bar 3 is made of a conductive material, is rod-shaped, and is arranged transversely along the vehicle body.

[0039] The above arrangement structure places the conductor rod 3 in a uniform magnetic field with approximately vertical magnetic flux lines, and the rod itself is also perpendicular to the magnetic flux lines. When relative movement occurs, based on the principle of motional electromotive force: E=BLV, where B is the magnetic flux density, L is the effective cutting length, and V is the speed of the conductor rod relative to the magnetic field, a larger motional electromotive force will be generated, which is convenient for subsequent signal monitoring. In addition, the front anti-collision beam 4 and the front bumper skin 5 mainly bear the impact of a head-on collision with the vehicle, so the deformation of the front bumper skin 5 is mainly along the longitudinal direction of the vehicle. The conductor rod 3 is arranged in the transverse direction, and the entire rod body is basically all effective cutting length, saving the material used and space occupied by the conductor rod 3. The first permanent magnet 1 and the second permanent magnet 2 can be fixedly connected to the front anti-collision beam 4 by setting a fixed bracket.

[0040] In order to further increase the generated motional electromotive force voltage signal, the width of the conductor rod 3 along the transverse direction of the vehicle body is equal to the width of the front anti-collision beam 4, thereby increasing the effective cutting length L and generating a larger motional electromotive force.

[0041] like Figure 2As shown, a plurality of support rods 51 are arranged on the inner side wall of the front bumper skin 5 at intervals along the lateral direction of the vehicle body; one end of the support rod 51 is fixedly connected to the front bumper skin 5, and the other end is fixedly connected to the conductor rod 3, so that a plurality of fixed connection points with the support rod 51 are formed on the conductor rod 3 at intervals along the lateral direction of the vehicle body.

[0042] Because conductor bar 3 is long, multiple support rods 51 securely support conductor bar 3 within the magnetic field formed between first permanent magnet 1 and second permanent magnet 2, providing stable support. Furthermore, support rods 51 are spaced laterally along the vehicle body. This ensures that any deformation of the front bumper fascia 5 is more fully transmitted to conductor bar 3, resulting in a more pronounced voltage signal and easier monitoring. Furthermore, conductor bar 3 can be provided with five fixed connection points to support rods 51, evenly spaced laterally along the vehicle body.

[0043] In use, when a collision causes conductor bar 3 to move relative to the permanent magnetic field generated by first and second permanent magnets 1 and 2, cutting through the magnetic flux lines, a motional electromotive force (EMF), or voltage, is generated in conductor bar 3. In the event of a head-on or rear-end collision, the collision intensity signal is detected and fed into the airbag computer. Based on the collision sensor signal, the airbag computer determines whether to detonate the inflator element to inflate the airbag, creating a cushion between the driver and the steering wheel, and between the front seat occupants and the instrument panel, preventing injuries from hard impacts.

[0044] In addition, it should be noted that when the first component is a rear anti-collision beam and the second component is a rear bumper skin, the first permanent magnet 1, the second permanent magnet 2 and the conductor rod 3 have similar structures and installation structures to those described above.

[0045] Example 2

[0046] The present invention employs a collision response method based on the aforementioned vehicle collision sensor. When the front bumper skin 5 deforms, the conductor bar 3 moves accordingly, cutting magnetic flux lines and generating voltage. The greater the deformation of the front bumper skin 5, the greater the distance the conductor bar 3 moves; the faster the deformation of the front bumper skin 5, the faster the conductor bar 3 moves. This is ultimately reflected in the voltage signal by two indicators: the duration of the generated voltage and the maximum value of the generated voltage. Therefore, the process of generating a primary motional electromotive force within the conductor bar 3 includes the following three scenarios.

[0047] ① When a motional electromotive force begins to generate within conductor bar 3, the vehicle is controlled to issue a safety warning, alerting the driver and the surrounding environment. The initial generation of a motional electromotive force indicates that a collision has occurred. Although the risk is low at this point, an immediate safety warning is still required to promptly alert the driver and the surrounding environment.

[0048] The safety warning methods include: controlling the vehicle's double flash to turn on, controlling the vehicle's horn to sound, controlling the vehicle's central control to sound an alarm, etc.

[0049] ② When the motional electromotive force generated in the conductor bar 3 reaches a set voltage value or the duration reaches a set time value, the vehicle is controlled to pre-tighten the seat belt.

[0050] When either the generated electromotive force or the duration reaches a set value, it indicates that the collision has progressed to a certain extent and is at a moderate risk. In addition to the safety warning, the seat belts will continue to be pre-tightened to prepare for a possible collision and protect the occupants. The set voltage and time values ​​are determined by the specific vehicle and vehicle collision sensor calibration.

[0051] ③ When the motional electromotive force generated in the conductor rod 3 exceeds the set voltage value and the duration exceeds the set time value, the vehicle is controlled to activate the airbag at the set position.

[0052] When both the generated motional electromotive force and the duration exceed the set values, there are two situations: a. The motional electromotive force reaches the set voltage value, and the duration is not less than the set time value; b. The duration reaches the set time value, and the motional electromotive force reaches the set voltage value at a certain moment within the duration; this indicates that the collision intensity is detected to be very high and the vehicle is in high danger. Based on the safety warning and seat belt pre-tightening, the corresponding airbag will pop out to protect the occupants.

[0053] For example: the first permanent magnet 1 and the second permanent magnet 2 are fixed on the front anti-collision beam 4, and the conductor rod 3 is fixed on the front bumper skin 5. The corresponding collision is a head-on collision, so the triggered airbags mainly involve the airbag system in the front of the vehicle. These airbags are quickly inflated and popped out when the vehicle is in a head-on collision to protect the head and upper body of the driver and passengers, such as driver and passenger airbags, knee airbags, etc.

[0054] In addition, after a set time has passed since the generation of a motional electromotive force within the conductor bar 3, the vehicle is controlled to disable the safety warning. This method is executed each time a motional electromotive force is generated within the conductor bar 3, that is, it is executed in batches. After the motional electromotive force is generated, after a set time, such as 1 minute, the vehicle response needs to be restored, mainly to restore the safety warning, because the warning reminder has been completed at this time and does not need to be continued.

[0055] Example 3

[0056] The present invention provides a collision response method based on the above-mentioned vehicle collision sensor, including: an acquisition unit, for monitoring the voltage of the conductor bar 3; a control unit, for obtaining the situation of motional electromotive force generated in the conductor bar 3 according to the monitoring result of the acquisition unit, and in the process of generating a motional electromotive force in the conductor bar 3: when the motional electromotive force begins to be generated in the conductor bar 3, controlling the vehicle to issue a safety warning and issue a reminder to the vehicle driver and the surrounding environment; when the motional electromotive force generated in the conductor bar 3 reaches a set voltage value or the duration reaches a set time value, controlling the vehicle to pre-tighten the seat belt; when the motional electromotive force generated in the conductor bar 3 reaches a set voltage value and the duration exceeds a set time value, controlling the vehicle to activate the airbag at a set position.

[0057] The acquisition unit can be connected to both ends of the conductor bar 3 through a wire to monitor the voltage. During the process of generating a motional electromotive force in the conductor bar 3, the control unit performs corresponding actions in the following three situations.

[0058] ① When a motional electromotive force begins to generate within conductor bar 3, the vehicle is controlled to issue a safety warning, alerting the driver and the surrounding environment. The initial generation of a motional electromotive force indicates that a collision has occurred. Although the risk is low at this point, an immediate safety warning is still required to promptly alert the driver and the surrounding environment.

[0059] The safety warning methods include: controlling the vehicle's double flash to turn on, controlling the vehicle's horn to sound, controlling the vehicle's central control to sound an alarm, etc.

[0060] ② When the motional electromotive force generated in the conductor bar 3 reaches a set voltage value or the duration reaches a set time value, the vehicle is controlled to pre-tighten the seat belt.

[0061] When either the generated electromotive force or the duration reaches a set value, it indicates that the collision has progressed to a certain extent and is at a moderate risk. In addition to the safety warning, the seat belts will continue to be pre-tightened to prepare for a possible collision and protect the occupants. The set voltage and time values ​​are determined by the specific vehicle and vehicle collision sensor calibration.

[0062] ③ When the motional electromotive force generated in the conductor rod 3 exceeds the set voltage value and the duration exceeds the set time value, the vehicle is controlled to activate the airbag at the set position.

[0063] When both the generated motional electromotive force and the duration exceed the set values, there are two situations: a. The motional electromotive force reaches the set voltage value, and the duration is not less than the set time value; b. The duration reaches the set time value, and the motional electromotive force reaches the set voltage value at a certain moment within the duration; this indicates that the collision intensity is very large and the situation is highly dangerous. On the basis of safety warnings and seat belt pre-tightening, the corresponding airbags will pop out to protect the occupants.

[0064] For example: the first permanent magnet 1 and the second permanent magnet 2 are fixed on the front anti-collision beam 4, and the conductor rod 3 is fixed on the front bumper skin 5. The corresponding collision is a head-on collision, so the triggered airbags mainly involve the airbag system in the front of the vehicle. These airbags are quickly inflated and popped out when the vehicle is in a head-on collision to protect the head and upper body of the driver and passengers, such as driver and passenger airbags, knee airbags, etc.

[0065] In addition, after a set time has passed since the generation of a motional electromotive force within the conductor bar 3, the vehicle is controlled to disable the safety warning. This method is executed each time a motional electromotive force is generated within the conductor bar 3, that is, it is executed in batches. After the motional electromotive force is generated, after a set time, such as 1 minute, the vehicle response needs to be restored, mainly to restore the safety warning, because the warning reminder has been completed at this time and does not need to be continued.

[0066] During use, when a collision causes the conductor rod 3 to move relative to each other in the permanent magnetic field generated by the first permanent magnet 1 and the second permanent magnet 2 and cut the magnetic lines of force, the acquisition unit detects that a motional electromotive force will be generated in the conductor rod 3, and the control unit immediately controls the vehicle to issue a safety warning and issue a reminder to the vehicle driver and the surrounding environment, such as turning on the hazard lights and honking the horn; then the motional electromotive force generated is continuously monitored, and when the motional electromotive force generated in the conductor rod 3 reaches a set voltage value or the duration reaches a set time value, the vehicle is immediately controlled to pre-tighten the seat belts; when the motional electromotive force generated in the conductor rod 3 exceeds the set voltage value and the duration exceeds the set time value, the vehicle is controlled to activate the airbag at the set position.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art may still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A collision response method for a vehicle collision sensor, characterized in that: A vehicle collision sensor comprises a first permanent magnet (1), a second permanent magnet (2) and a conductor bar (3), wherein the first permanent magnet (1) and the second permanent magnet (2) are both fixed on a first component on a vehicle body; the conductor bar (3) is fixed on a second component on the vehicle body, and the conductor bar (3) is located in a magnetic field formed between the first permanent magnet (1) and the second permanent magnet (2); when a vehicle collision occurs and the relative positions of the first component and the second component change, a motional electromotive force can be generated in the conductor bar (3); The process of generating a primary motional electromotive force in the conductor rod (3) includes: When motional electromotive force begins to be generated in the conductor rod (3), the vehicle is controlled to issue a safety warning, and a reminder is issued to the vehicle driver and the surrounding environment; When the motional electromotive force generated in the conductor rod (3) reaches a set voltage value or the duration reaches a set time value, the vehicle is controlled to pre-tighten the seat belt; When the motional electromotive force generated in the conductor rod (3) exceeds a set voltage value and the duration exceeds a set time value, the vehicle is controlled to activate the safety airbag at a set position.

2. The collision response method of a vehicle collision sensor according to claim 1, characterized in that: The first component is a front anti-collision beam (4), and the second component is a front bumper skin (5).

3. The collision response method of a vehicle collision sensor according to claim 2, characterized in that: The first permanent magnet (1) and the second permanent magnet (2) are both in the form of flat plates, fixed on the top of the front anti-collision beam (4), and the plates with opposite magnetic poles are arranged parallel to each other to form a magnetic field for placing the conductor rod (3).

4. The collision response method of a vehicle collision sensor according to claim 3, characterized in that: The plate surfaces of the first permanent magnet (1) and the second permanent magnet (2) are perpendicular to the vertical direction of the vehicle body.

5. The collision response method of a vehicle collision sensor according to claim 2, characterized in that: The conductor rod (3) is made of conductive material, is in a rod shape, and is arranged transversely along the vehicle body.

6. The collision response method of a vehicle collision sensor according to claim 5, characterized in that: The width of the conductor bar (3) in the transverse direction of the vehicle body is equal to the width of the front anti-collision beam (4).

7. The collision response method of a vehicle collision sensor according to claim 5, characterized in that: A plurality of support rods (51) are arranged on the inner side wall of the front bumper skin (5) at intervals along the transverse direction of the vehicle body; one end of the support rod (51) is fixedly connected to the front bumper skin (5), and the other end is fixedly connected to the conductor rod (3), so that a plurality of fixed connection points with the conductor rod (3) are formed on the conductor rod (3) at intervals along the transverse direction of the vehicle body.

8. The collision response method of a vehicle collision sensor according to claim 1, characterized in that: Also includes: After a set time has passed since a motional electromotive force is generated once in the conductor rod (3), the vehicle is controlled to shut down the safety warning.

9. A collision response system for a vehicle collision sensor, characterized in that: A vehicle collision sensor comprises a first permanent magnet (1), a second permanent magnet (2) and a conductor bar (3), wherein the first permanent magnet (1) and the second permanent magnet (2) are both fixed on a first component on a vehicle body; the conductor bar (3) is fixed on a second component on the vehicle body, and the conductor bar (3) is located in a magnetic field formed between the first permanent magnet (1) and the second permanent magnet (2); When a vehicle collides and the relative positions of the first component and the second component change, a motional electromotive force can be generated in the conductor bar (3); The response system includes: A collection unit, used for monitoring the voltage of the conductor rod (3); A control unit is used to obtain the situation of the motional electromotive force generated in the conductor rod (3) based on the monitoring result of the acquisition unit, and in the process of generating a motional electromotive force in the conductor rod (3): When motional electromotive force begins to be generated in the conductor rod (3), the vehicle is controlled to issue a safety warning, and a reminder is issued to the vehicle driver and the surrounding environment; When the motional electromotive force generated in the conductor rod (3) reaches a set voltage value or the duration reaches a set time value, the vehicle is controlled to pre-tighten the seat belt; When the motional electromotive force generated in the conductor rod (3) exceeds a set voltage value and the duration exceeds a set time value, the vehicle is controlled to activate the safety airbag at a set position.

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