Collision detection circuit, method for a vehicle and vehicle

Abstract

The application provides a collision detection circuit, a method and a vehicle, and belongs to the technical field of vehicle detection, wherein the collision detection circuit comprises a data acquisition module and at least two monitoring modules connected with the data acquisition module respectively, and the data acquisition module is connected with a controller of the vehicle; when the collision signals of the at least two monitoring modules are synchronously acquired, the data acquisition module transmits the collision signals to the controller, so that the controller controls to close high-voltage components of the vehicle. The collision detection circuit of the vehicle provided by the application can avoid the operation and processing steps of the controller on the collision signals, and can instantly determine the existence of a collision event through the collision signals of the two monitoring modules. The controller controls to close the high-voltage components of the vehicle according to the collision signals, so that the detection failure or signal delay is prevented, the response time of the system power-off during the collision is shortened, and the safety and reliability of the system are improved.

Description

Vehicle collision detection circuits, methods, and vehicles Technical Field

[0001] This application relates to the field of vehicle detection technology, and in particular to a collision detection circuit, method and vehicle for a vehicle. Background Technology

[0002] When electric vehicles or hydrogen fuel cell vehicles collide, high-voltage components or high-voltage wire protective shells may be damaged. If the high-voltage power output cannot be disconnected in time after the collision, there is a risk of electric shock when people touch the high-voltage live parts. Therefore, it is necessary to control the vehicle to a power-off state as soon as possible after a collision.

[0003] In related technologies, when a vehicle's collision monitoring module detects a collision, it transmits a collision signal to the vehicle's high-voltage power components via a PWM (Pulse Width Modulation) wave. The relays inside these components then disconnect, thus disconnecting the high-voltage power to the entire vehicle. However, the vehicle controller needs to combine multiple cycles of the PWM wave to identify, calculate, and determine the collision event. This entire process takes tens to hundreds of milliseconds. The excessively long time required from the occurrence of the collision to the complete disconnection of the high-voltage power to the vehicle leaves occupants at risk of electric shock. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a collision detection circuit, method and vehicle for a vehicle, so as to solve the problem of long power-off response time when a vehicle collides in the prior art.

[0005] To achieve the above objectives, this application provides a collision detection circuit for a vehicle, including a data acquisition module and at least two monitoring modules respectively connected to the data acquisition module, wherein the data acquisition module is connected to the vehicle's controller.

[0006] The data acquisition module is used to transmit the collision signal to the controller when it synchronously acquires the collision signal generated by the at least two monitoring modules, so that the controller can control the shutdown of the high-voltage components of the vehicle.

[0007] Furthermore, both of the at least two monitoring modules include a collision switch;

[0008] When a vehicle collision occurs, the conduction state of the collision switch in each of the monitoring modules changes, so that each of the monitoring modules generates the collision signal.

[0009] Furthermore, the monitoring module is a first monitoring module, which includes a first collision switch and a first signal terminal. The first collision switch is connected to a common voltage terminal and the first signal terminal respectively, and is used to turn the common voltage terminal and the first signal terminal on or off. When a vehicle collision occurs, the common voltage terminal and the first signal terminal are in an off state, and the first signal terminal generates a first collision signal; or,

[0010] The monitoring module is a second monitoring module, which includes a second collision switch and a second signal terminal. The second collision switch is connected to a common voltage terminal and a second signal terminal respectively, and is used to turn on or off the common voltage terminal and the second signal terminal. When a vehicle collision occurs, the common voltage terminal and the second signal terminal are in a conducting state, and the second signal terminal generates a second collision signal.

[0011] Furthermore, it also includes a collision sensing module, wherein the first collision switch is a transistor, the base of the transistor is connected to the collision sensing module, the collector of the transistor is connected to the first signal terminal, and the emitter of the transistor is connected to the common voltage terminal; or, the second collision switch is a transistor, the base of the transistor is connected to the collision sensing module, the collector of the transistor is connected to the second signal terminal, and the emitter of the transistor is connected to the common voltage terminal.

[0012] Furthermore, it also includes an output voltage terminal, which is connected to the first monitoring module, and the first signal terminal is positioned between the output voltage terminal and the first collision switch; or,

[0013] The output voltage terminal is connected to the second monitoring module, and the second signal terminal is located between the output voltage terminal and the second collision switch.

[0014] Furthermore, at least two of the monitoring modules are connected in parallel to the data acquisition module.

[0015] Based on the same inventive concept, this application also provides a vehicle collision detection and processing method, including:

[0016] In response to determining that a vehicle collision has occurred, a collision signal is issued through at least two monitoring modules.

[0017] The system receives the collision signal generated by the at least two monitoring modules and collects it from the data acquisition module, and controls the shutdown of the vehicle's high-voltage components.

[0018] Furthermore, it also includes:

[0019] In response to determining that the vehicle is in collision self-check mode, the collision sensing module sends periodic self-check signals to the at least two monitoring modules.

[0020] If the collision signal generated by the at least two monitoring modules changes in response to the change of the periodic self-test signal, then the self-test is determined to be passed.

[0021] Furthermore, it also includes:

[0022] In response to determining that the vehicle is in startup mode, an initial level signal is sent through a monitoring module to wake up the vehicle's high-voltage component controller.

[0023] Based on the same inventive concept, this application also provides a vehicle including a collision detection circuit as described in any of the preceding claims.

[0024] As can be seen from the above, the vehicle collision detection circuit, method and vehicle provided in this application can synchronously collect the collision signals of at least two monitoring modules by using a data acquisition module. When the data acquisition module detects the collision signals of the two monitoring modules at the same time, it can directly determine that the vehicle has collided, eliminating the need for the step of combining multiple cycles of collision signals for calculation and processing, shortening the response time of system power failure during collision, preventing detection failure or signal delay, and improving the safety and reliability of the system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the control circuit when a vehicle collision occurs in the prior art of this application;

[0027] Figure 2 is a schematic diagram of the connection of each component of the vehicle collision detection circuit in the embodiment of this application;

[0028] Figure 3 is a schematic diagram of the vehicle collision detection circuit in the embodiment of this application;

[0029] Figure 4 is a schematic diagram of the signal change waveforms of the first monitoring module and the second monitoring module in the embodiment of this application;

[0030] Figure 5 is a flowchart illustrating the steps of the vehicle collision detection method in an embodiment of this application.

[0031] Figure 6 is a schematic diagram of the hardware structure of the electronic device in the embodiment of this application.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Data acquisition module;

[0034] 2. First monitoring module; 21. First collision switch; 22. First signal terminal;

[0035] 3. Second monitoring module; 31. Second collision switch; 32. Second signal terminal;

[0036] 4. Common voltage terminal; 5. Collision sensing module; 6. Output voltage terminal; 7. Current limiting resistor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] Figure 1 is a schematic diagram of the control circuit when a collision occurs in a conventional vehicle. In the prior art shown in Figure 1, when the vehicle's collision sensing module detects a collision event, it sends a signal to both the Vehicle Control Unit (VCU) and the Battery Management System (BMS) in the form of a CAN signal. After receiving the signal, the BMS confirms the validity of the collision event by combining multiple cycles of the pulse signal for identification and calculation. Then, the VCU controls the battery contactor to close according to the signal from the collision sensing module, thereby cutting off the vehicle's power.

[0040] Throughout the entire process described above, the time from when the collision module detects a vehicle collision event to when the vehicle loses power takes more than 100ms. The long response time for the vehicle to lose power means that the battery management system cannot cut off power in time, thereby increasing the risk of electric shock to vehicle occupants.

[0041] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0042] To address the above issues, as shown in Figures 2 and 3, one or more embodiments of this application provide a vehicle collision detection circuit, including a data acquisition module 1 and at least two monitoring modules respectively connected to the data acquisition module 1, wherein the data acquisition module 1 is connected to the vehicle's controller.

[0043] The data acquisition module 1 is used to transmit the collision signal to the controller when the collision signal generated by the at least two monitoring modules is acquired synchronously, so that the controller can control the shutdown of the high-voltage components of the vehicle.

[0044] As can be seen from the above description, the collision detection circuit described in this application uses the data acquisition module 1 to simultaneously acquire the collision signals of at least two monitoring modules. When the data acquisition module 1 detects the collision signals of the two monitoring modules at the same time, it can directly determine that a vehicle collision has occurred. There is no need to perform calculation and processing steps based on multiple cycles of the collision signal, which shortens the response time of the system power failure during a collision, prevents detection failures or signal delays, and improves the safety and reliability of the system.

[0045] It should be noted that the vehicle described in this application can be an electric vehicle, a hybrid electric vehicle, or a fuel-powered vehicle. Here, for example, a fuel-powered vehicle is driven by hydrogen fuel. It generates electrical energy through the electrochemical reaction of hydrogen and air, and then outputs it to the high-voltage bus of the vehicle through a DC-DC converter. The high-voltage bus connects the power battery and high-voltage components such as the drive motor. The high voltage of the vehicle is generally between 250-830V.

[0046] For electric vehicles and hybrid electric vehicles, the high-voltage components of the vehicle include the high-voltage lines in the vehicle's power battery assembly. For hydrogen fuel cell vehicles, in addition to the high-voltage lines in the power battery assembly, the high-voltage lines also include the high-voltage lines of the hydrogen fuel cell assembly and the high-voltage lines of the hydrogen storage module, etc. As long as it is a high-voltage transmission line of the vehicle, this application does not make specific limitations on it.

[0047] In some implementations, the vehicle controller is a vehicle control unit (VCU). As an alternative implementation, the vehicle controller can also be a high-voltage component controller installed in the power battery assembly, hydrogen fuel cell assembly, and hydrogen storage module, which controls the power outage of the high-voltage components.

[0048] In some embodiments, the data acquisition module 1 and each monitoring module are connected to the vehicle's mature electrical load power supply for power supply. This setup can utilize the vehicle's own power supply for power supply and detection, thereby minimizing the introduction of external loads or line interfaces. When using an electrical load power supply, its output voltage is generally 12V or 24V. The following description will use the method of using an electrical load power supply.

[0049] In some embodiments, each of the at least two monitoring modules includes a collision switch. For example, the collision detection circuit includes a first monitoring module and a second monitoring module. The first monitoring module 2 includes a first collision switch 21, and the second monitoring module 3 includes a second collision switch 31. When a vehicle collision occurs, the conduction states of the first collision switch 21 and the second collision switch 31 change, thereby causing the first monitoring module 2 to generate a first collision signal and the second monitoring module 3 to generate a second collision signal. The data acquisition module 1 is used to control the shutdown of the vehicle's high-voltage components when it simultaneously receives the first and second collision signals.

[0050] In the above embodiments, for example, the first monitoring module 2 further includes a first signal terminal 22, and the first collision switch 21 is connected to the common voltage terminal 4 and the first signal terminal 22 respectively, and is used to turn on or off the common voltage terminal 4 and the first signal terminal 22; when a vehicle collision occurs, the common voltage terminal 4 and the first signal terminal 22 are in a disconnected state, and the first signal terminal 22 generates a first collision signal.

[0051] Here, the common voltage terminal 4 mentioned in this application is a connection point of the circuit set for easy analysis of the circuit. In some embodiments, the negative terminal of the power supply is generally set as the common point. The common voltage terminal 4 can be a common power supply terminal or a common ground terminal. In this embodiment, the common voltage terminal 4 is selected as the GND terminal (ground terminal).

[0052] The first signal terminal 22 is located between the output voltage terminal 6 of the power supply to the electrical load and the first collision switch 21. When the power supply to the electrical load provides the output voltage and the first signal terminal 22 and the common voltage terminal 4 are in a conducting state, the output voltage of the first signal terminal 22 acquired by the data acquisition module 1 is zero. When a vehicle collision occurs, the first collision switch 21 switches from a conducting state to a disconnected state. At this time, the first signal terminal 22 and the common voltage terminal 4 are in an open circuit state, and the output voltage of the first signal terminal 22 acquired by the data acquisition module 1 should be the voltage supplied by the electrical load.

[0053] In addition, the second monitoring module 3 also includes a second signal terminal 32. The second collision switch 31 is connected to the common voltage terminal 4 and the second signal terminal 32 respectively, and is used to turn on or off the common voltage terminal 4 and the second signal terminal 32. When a vehicle collision occurs, the common voltage terminal 4 and the second signal terminal 32 are in a conducting state, and the second signal terminal 32 generates a second collision signal.

[0054] As described above, the second signal terminal 32 is positioned between the output voltage terminal 6 of the electrical load power supply and the second collision switch 31. The electrical load power supply provides the output voltage, and the second signal terminal 32 and the common voltage terminal 4 are in an open circuit state. The output voltage of the second signal terminal 32 acquired by the data acquisition module 1 is the electrical load power supply voltage. When a vehicle collision occurs, the second collision switch 32 switches from the open state to the on state. At this time, the second signal terminal 32 and the common voltage terminal 4 are in a conducting state, and the output voltage of the second signal terminal 32 acquired by the data acquisition module 1 is zero.

[0055] The data acquisition module 1 can employ a voltage sensor or other devices capable of detecting voltage changes. The data acquisition module 1 sends the collision signal to the vehicle controller. Upon determining that a collision event has occurred, the vehicle controller sends a power-off signal to each high-voltage component controller, causing the high-voltage component controller to de-energize the high-voltage components. In some embodiments, the data acquisition module 1 can also directly send the collision signal to each high-voltage component controller.

[0056] In the above description, the positions of the first signal terminal 22 and the second signal terminal 32 are not absolutely limited. In some embodiments, for example, the first signal terminal 22 is set at the pin connection position of the first collision switch 21 corresponding to the pin connection position of the electrical load power supply, and the second signal terminal 32 is set at the pin connection position of the second collision switch 31 corresponding to the pin connection position of the electrical load power supply.

[0057] It should be noted that, as shown in Figure 3, in the high-voltage circuit of the same power battery assembly, there are two power supply circuits corresponding to the first monitoring module 2 and the second monitoring module 3, respectively. Each power supply circuit includes an output voltage terminal 6 corresponding to the electrical load supply voltage and a current-limiting resistor 7 connected in series with the output voltage terminal 6. The first signal terminal 22 and the second signal terminal 32 are located on the power supply circuit after the current-limiting resistor 7. Figure 3 is a circuit diagram showing the connection between the power battery assembly and the fuel cell assembly and the first monitoring module 2 and the second monitoring module 3, respectively. When there are other high-voltage components in the vehicle that need to be disconnected after a collision, the connection can be made with reference to the circuit diagram shown above.

[0058] In some embodiments, a capacitor is connected in series with the output voltage terminal 6 of the power supply circuit, and this capacitor is grounded, thereby serving as a filter for the power supply circuit. The high-voltage lines in the fuel cell assembly or the hydrogen storage module are also arranged in the same manner as the power supply circuit in the power battery assembly; this will not be elaborated further in this embodiment.

[0059] In the above description, for example, the first monitoring module 2 and the second monitoring module 3 are connected in parallel to the data acquisition module 1, and the collision signals of the first monitoring module 2 and the second monitoring module 3 are collected together by the data acquisition module 1; in some embodiments, each monitoring module is respectively connected to a data acquisition module 1, and the data acquisition modules 1 are electrically connected to each other so as to simultaneously detect the first monitoring module 2 and the second monitoring module 3.

[0060] In some embodiments, the vehicle collision detection circuit further includes a collision sensing module 5, the first collision switch 21 is a transistor, the base of the transistor is connected to the collision sensing module 5, the collector of the transistor is connected to the first signal terminal 22, and the emitter of the transistor is connected to the common voltage terminal 4.

[0061] In addition, the second collision switch 31 is also a transistor. The base of the transistor is connected to the collision sensing module 5, the collector of the transistor is connected to the second signal terminal 32, and the emitter of the transistor is connected to the common voltage terminal 4.

[0062] In the above embodiments, the collision sensing module 5 refers to a control module related to the output of a vehicle collision event trigger signal. For example, the collision sensing module 5 is the vehicle's airbag module (ABM). When the airbag module deploys, it indicates a vehicle collision. At this time, the collision sensing module 5 outputs voltage signals to control the switching states of the first collision switch 21 and the second collision switch 31, thereby causing the first signal terminal 22 to generate a first collision signal and the second signal terminal 32 to generate a second collision signal. Of course, the collision sensing module 5 can also be combined with other vehicle-related collision monitoring modules, such as vehicle body collision sensors, etc.

[0063] In some embodiments, both the first collision switch 21 and the second collision switch 31 employ NPN transistors. By inputting different currents to the base, the operating state between the cutoff region and the saturation region of the transistor is switched, thereby achieving the switching function of the transistor. Specifically, the working principle is as follows: applying a forward voltage between the base and emitter makes the PN junction between the base and emitter forward biased, and the transistor conducts; when the base voltage becomes low, or the collector voltage is lower than the emitter voltage, the transistor is cut off. Here, the NPN transistor can be an MMBT3904LT1G silicon transistor or an MMBT3906-7-F germanium transistor; this embodiment does not impose an absolute limitation on this.

[0064] An exemplary vehicle collision detection method is presented below, as shown in Figure 4. The lower signal waveform in Figure 4 represents the waveform of the first monitoring module 2, and the upper signal waveform represents the waveform of the second monitoring module 3. Under normal vehicle driving conditions, the collision sensing module 5 continuously inputs a high level to the base of the first collision switch 21. At this time, the first collision switch 21 is in the on state, and the first signal terminal 22 and the common voltage terminal 4 are connected to form a circuit. The potential information of the first signal terminal 22 collected by the data acquisition module 1 is low potential. The collision sensing module 5 continuously inputs a low level to the base of the second collision switch 31. At this time, the second collision switch 31 is in the off state, and the first signal terminal 22 and the common voltage terminal 4 are not connected and are in the open circuit state. The potential information of the second signal terminal 32 collected by the data acquisition module 1 is high potential. That is, when the data acquisition module 1 simultaneously collects the first signal terminal 22 as low potential and the second signal terminal 32 as high potential, it is determined that the vehicle is in a normal driving state, and the high voltage components are working normally.

[0065] When a vehicle collision occurs, the collision sensing module 5 switches from inputting a high level to the base of the first collision switch 21 to inputting a low level. Simultaneously, it switches from inputting a low level to inputting a high level to the base of the second collision switch 31. The emitter junction and collector junction of the transistor corresponding to the first collision switch 21 are reverse-biased, and the transistor is in the cutoff region. The first signal terminal 22 and the common voltage terminal 4 are not connected and are in an open circuit state. The emitter junction and collector junction of the transistor corresponding to the second collision switch 31 are forward-biased, and the transistor is in the saturation region. The second signal terminal 32 and the common voltage terminal 4 form a circuit. The data acquisition module 1 simultaneously acquires the potential information of the first signal terminal 22 as high and the potential information of the second signal terminal 32 as low, then determines that a vehicle collision event has occurred and controls the high-voltage relay of the high-voltage component to disconnect.

[0066] In some embodiments, for example, the collision sensing module 5 inputs a high-level signal to the base of the first collision switch 21 and also inputs a high-level signal to the base of the second collision switch 31. Both the first collision switch 21 and the second collision switch 31 are in the ON state, and the potential information of the first signal terminal 22 and the second signal terminal 32 acquired by the data acquisition module 1 is both low potential. When a vehicle collision occurs, the collision sensing module 5 switches from inputting a high-level signal to the base of the first collision switch 21 and the second collision switch 31 to inputting a low-level signal, and both the first collision switch 21 and the second collision switch 31 switch to the OFF state. At this time, the data acquisition module 1 simultaneously acquires the potential information of the first signal terminal 22 and the second signal terminal 32, both of which are high potential, and then determines that a vehicle collision event has occurred, controlling the high-voltage relay of the high-voltage component to disconnect. Here, the high-voltage relay refers to the relay on the circuit connecting the vehicle's power battery to the vehicle's high-voltage system, and / or the relay located inside the vehicle's power battery box.

[0067] Similarly, in some embodiments, the collision sensing module 5 inputs a low level to the base of the first collision switch 21 and also inputs a low level to the base of the second collision switch 31. Both the first collision switch 21 and the second collision switch 31 are in the off state, and the potential information of the first signal terminal 22 and the second signal terminal 32 collected by the data acquisition module 1 is both high potential. When a vehicle collision occurs, the collision sensing module 5 switches from inputting a low level to the base of the first collision switch 21 and the second collision switch 31 to inputting a high level, and both the first collision switch 21 and the second collision switch 31 switch to the on state. At this time, the data acquisition module 1 simultaneously collects the potential information of the first signal terminal 22 and the second signal terminal 32, which are both low potential. Therefore, it determines that a vehicle collision event has occurred and controls the high-voltage relay of the high-voltage component to disconnect.

[0068] It should be noted that the high-level signal input to the collision sensing module 5 is set according to the specifications of the transistor. As long as the working state of the transistor can be switched, it is acceptable. Since there is a voltage drop when the transistor is in the conducting state, when the potential information of the first signal terminal 22 or the second signal terminal 32 acquired by the data acquisition module 1 is high, it is acceptable as long as the potential is close to the voltage potential of the output voltage terminal 6.

[0069] The above embodiments illustrate how the collision sensing module 5 switches the first collision switch 21 and the second collision switch 31 to either be on or off by inputting different level signals. For different implementation methods, the core idea is that the state switching of the first collision switch 21 and the second collision switch 31 will not be affected during normal vehicle operation, that is, the collision sensing module 5 always maintains the same level output; only when a collision occurs, the level signal output by the collision sensing module 5 changes transiently, causing the first collision switch 21 and the second collision switch 31 to switch states, thereby causing a significant potential change in the first signal terminal 22 and the second signal terminal 32, and the data acquisition module 1 simultaneously acquires the potential change of the first signal terminal 22 and the second signal terminal 32, is it determined that a vehicle collision event has occurred, thus facilitating the high-voltage component controller to control the high-voltage component to perform subsequent power-off operations.

[0070] In some embodiments, the transistors used in the first collision switch 21 and the second collision switch 31 can also be PNP transistors, or the first collision switch 21 can be an NPN transistor and the second collision switch 31 can be a PNP transistor, as long as the change in the input level of the collision sensing module 5 can drive the state switching of the collision switches.

[0071] In some embodiments, three or more monitoring modules can be adaptively configured. Each monitoring module's collision switch uses a transistor, and the base of each collision switch is connected to the collision sensing module 5. Upon receiving input level information from the collision sensing module 5, the switching module switches its operating state, causing each monitoring module to generate a collision signal. The data acquisition module 1 collects the collision signals from all monitoring modules and determines the time of the vehicle collision, thus initiating a subsequent power-off operation. This configuration combines collision signals from multiple monitoring modules for judgment, further improving the judgment accuracy of the data acquisition module 1 and avoiding false judgments.

[0072] Furthermore, it should be noted that, in the context of the "synchronous acquisition" of the data acquisition module 1 in this application, since there is a small signal delay when the signal input of each monitoring module switches working states, but this signal delay is within an acceptable error range (generally 1ms-3ms), the data acquisition module 1 can determine a collision event as long as it receives a change in the signal from each monitoring module.

[0073] As can be seen from the above description, the collision detection circuit described in this application utilizes the data acquisition module 1 to simultaneously acquire the collision signals of the first monitoring module 2 and the second monitoring module 3. Since the collision signals corresponding to the first monitoring module 2 and the second monitoring module 3 are different, when the data acquisition module 1 detects the collision signals of the first monitoring module 2 and the second monitoring module 3 at the same time, it can directly determine that a vehicle collision has occurred without the need for calculation and processing steps on the collision signals. This shortens the response time of system power failure during a collision, prevents detection failures or signal delays, and improves the safety and reliability of the system.

[0074] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0075] Based on the same inventive concept, this application also provides a vehicle collision detection and processing method, including:

[0076] S400, in response to determining that a vehicle collision has occurred, sends out collision signals through at least two monitoring modules;

[0077] S500 receives the collision signal generated by the at least two monitoring modules and collects it from the data acquisition module, and controls the shutdown of the high-voltage components of the vehicle.

[0078] The vehicle collision detection processing method described above can be applied to the vehicle collision detection circuit described in any of the above embodiments.

[0079] In some embodiments, the vehicle is equipped with a first monitoring module 2 and a second monitoring module 3. In step S400 above, a vehicle collision is identified and determined by a collision sensing module 5. The collision sensing module 5 refers to a control module related to the output of a vehicle collision event trigger signal. For example, the collision sensing module 5 is the vehicle's airbag module (ABM). When the airbag module deploys, it indicates that a vehicle collision has occurred. At this time, the collision sensing module 5 outputs voltage signals to control the switching states of the first collision switch 21 of the first monitoring module 2 and the second collision switch 31 of the second monitoring module 3, thereby causing the first signal terminal 22 of the first monitoring module 2 to generate a first collision signal and the second signal terminal 32 of the second monitoring module 3 to generate a second collision signal. Of course, the collision sensing module 5 can also be combined with other vehicle-related collision monitoring modules, such as vehicle body collision sensors, etc.

[0080] In some embodiments, prior to step S101, the following steps are further included:

[0081] S200, in response to determining that the vehicle is in collision self-check mode, sends periodic self-check signals to the at least two monitoring modules through the collision sensing module;

[0082] S300, in response to the collision signal generated by the at least two monitoring modules changing with the change of the periodic self-test signal, it is determined that the self-test has passed.

[0083] In some embodiments, in step S200 above, when both the first collision switch 21 of the first monitoring module and the second collision switch 31 of the second monitoring module use transistors, a first self-test signal is sent to the first monitoring module and a second self-test signal is sent to the second monitoring module. Here, the peak voltage values ​​of the first self-test signal and the second self-test signal should be large enough to switch the on / off state of the first collision switch 21 and the second collision switch 31. That is, the first collision switch 21 and the second collision switch 31 will periodically switch their on / off state according to the periodic change of the self-test signal, thereby causing the potential information of the first signal terminal 22 and the second signal terminal 32 to show a periodic change of high potential / low potential. After the data acquisition module 1 acquires the potential information of the first signal terminal 22 and the second signal terminal 32, it transmits it to the vehicle controller or the high-voltage component controller. The vehicle controller or the high-voltage component controller determines whether the collision detection circuit is in normal working condition based on the acquired potential information.

[0084] In some embodiments, for example, the cycle period of the first self-test signal and the second self-test signal is 40. The collision detection circuit is verified to be in normal working condition by detecting the potential changes of the first signal terminal 22 and the second signal terminal 32 within 40 cycles.

[0085] In some embodiments, prior to step S200, the following steps are also included:

[0086] S100, in response to determining that the vehicle is in startup mode, sends an initial level signal through a monitoring module, the initial level signal being used to wake up the vehicle's high-voltage component controller.

[0087] In step S100 above, the initial level signal is a high level signal. When the collision sensing module 5 inputs a high level signal to the first collision switch 21 or the second collision switch 31, the corresponding first collision switch 21 or the corresponding second collision switch 31 is in the conducting state. The high level signal wakes up all controllers of the high voltage component so that the controller can perform a power-off operation when a collision event occurs.

[0088] It should be noted that, since there are multiple high-voltage component assemblies in some vehicle scenarios, the wake-up time of the corresponding controller in each high-voltage component assembly is different. The high-level signal input from the collision sensing module 5 to the first monitoring module 2 or the second monitoring module 3 should be long enough to wake up all the high-voltage component controllers. For example, the high-level signal input lasts for 500ms.

[0089] Based on the above description, as shown in Figures 4 and 5, an exemplary collision detection method of this application is as follows:

[0090] When the vehicle is in the power-on state, the collision sensing module 5 inputs a 500ms high-level signal to the first monitoring module 2 or the second monitoring module 3 to wake up the relevant controller in the high-voltage components. Subsequently, after inputting a 100ms high-level signal to the first monitoring module 2 through the collision sensing module 5, a periodic cyclic pulse signal of 20ms low level and 60ms high level is input for 40 cycles. The collision sensing module 5 then inputs a periodic cyclic pulse signal of 60ms low level and 20ms high level to the second monitoring module 3 for 40 cycles. During this period, the data acquisition module 1 acquires the level information of the first signal terminal 22 corresponding to the first monitoring module 2 and the level information of the second signal terminal 32 corresponding to the second monitoring module 3. The collision detection circuit is confirmed to be in normal working condition by comparing the signal input from the collision sensing module 5.

[0091] After the above steps are completed, the collision sensing module 5 continuously inputs a high-level signal to the first monitoring module 2 and a low-level signal to the second monitoring module 3. When a collision occurs, the level information of the collision sensing module 5 and the first monitoring module 2 immediately enters a cycle of 1000ms low level and 1000ms high level, and the level information of the collision sensing module 5 and the second monitoring module 3 immediately enters a cycle of 1000ms high level and 1000ms low level. The data acquisition module 1 detects the simultaneous change of the first signal terminal 22 and the second signal terminal 32, identifies and confirms the time of the collision, and immediately controls the disconnection of the high-voltage relay of the vehicle to realize the high-voltage power cut-off of the whole vehicle.

[0092] After the vehicle inspection is completed, that is, after the alarm of the collision sensor module 5 is cleared, the collision sensor module 5 will repeat the above wake-up and self-test steps and continuously input a high-level signal to the first monitoring module 2 and continuously input a low-level signal to the second monitoring module 3 until the next collision event occurs.

[0093] It should be noted that the method in this embodiment can be executed by a single device, such as a computer or server. The method can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method in this embodiment, and the multiple devices will interact with each other to complete the method described.

[0094] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0095] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the collision detection method described in any of the above embodiments.

[0096] Figure 6 shows a more specific hardware structure diagram of an electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0097] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0098] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0099] The input / output interface 1030 is used to connect input / output modules to realize information input and output. The input / output modules can be configured as components in the device (not shown in Figure 6) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touch screens, microphones, various sensors, etc., and output devices may include displays, speakers, vibrators, indicator lights, etc.

[0100] The communication interface 1040 is used to connect the communication module (not shown in Figure 6) to enable communication between this device and other devices. The communication module can communicate via wired means (e.g., USB, Ethernet cable, etc.) or wireless means (e.g., mobile network, WIFI, Bluetooth, etc.).

[0101] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0102] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0103] The electronic devices described above are used to implement the corresponding collision detection methods in any of the foregoing embodiments and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0104] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the collision detection method as described in any of the above embodiments.

[0105] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0106] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the collision detection method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0107] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0108] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0109] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0110] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A collision detection circuit for a vehicle, characterized in that, The system includes a data acquisition module and at least two monitoring modules connected to the data acquisition module. The data acquisition module is connected to the vehicle's controller. When the data acquisition module synchronously acquires collision signals generated by the at least two monitoring modules, it transmits the collision signals to the controller, causing the controller to shut down high-voltage components of the vehicle. The at least two monitoring modules include a first monitoring module and a second monitoring module, each including a collision switch. When a collision occurs, the conduction state of the collision switches in each monitoring module changes, causing each monitoring module to generate the collision signal. The first monitoring module includes a first... The first collision switch is connected to a common voltage terminal and a first signal terminal, respectively, and is used to turn the common voltage terminal and the first signal terminal on or off. When a vehicle collision occurs, the common voltage terminal and the first signal terminal are in a disconnected state, and the first signal terminal generates a first collision signal. The second monitoring module includes a second collision switch and a second signal terminal. The second collision switch is connected to a common voltage terminal and a second signal terminal, respectively, and is used to turn the common voltage terminal and the second signal terminal on or off. When a vehicle collision occurs, the common voltage terminal and the second signal terminal are in a connected state, and the second signal terminal generates a second collision signal.

2. The vehicle collision detection circuit according to claim 1, characterized in that, It also includes a collision sensing module, wherein the first collision switch is a transistor, the base of the transistor is connected to the collision sensing module, the collector of the transistor is connected to the first signal terminal, and the emitter of the transistor is connected to the common voltage terminal; or, the second collision switch is a transistor, the base of the transistor is connected to the collision sensing module, the collector of the transistor is connected to the second signal terminal, and the emitter of the transistor is connected to the common voltage terminal.

3. The vehicle collision detection circuit according to claim 1, characterized in that, It also includes an output voltage terminal, which is connected to the first monitoring module, and the first signal terminal is disposed between the output voltage terminal and the first collision switch; or, the output voltage terminal is connected to the second monitoring module, and the second signal terminal is disposed between the output voltage terminal and the second collision switch.

4. The collision detection circuit for a vehicle according to any one of claims 1 to 3, characterized in that, At least two of the monitoring modules are connected in parallel to the data acquisition module.

5. A collision detection and processing method for vehicles, characterized in that, A collision detection circuit applied to a vehicle according to any one of claims 1-4, comprising: in response to determining that a collision has occurred, emitting collision signals through at least two monitoring modules respectively; receiving the collision signals generated by the at least two monitoring modules and acquiring them through a data acquisition module, and controlling the shutdown of high-voltage components of the vehicle.

6. The collision detection processing method according to claim 5, characterized in that, Also includes: In response to determining that the vehicle is in collision self-check mode, the collision sensing module sends periodic self-check signals to the at least two monitoring modules. If the collision signal generated by the at least two monitoring modules changes in response to the change of the periodic self-test signal, then the self-test is determined to be passed.

7. The collision detection processing method according to claim 6, characterized in that, Also includes: In response to determining that the vehicle is in startup mode, an initial level signal is sent through a monitoring module to wake up the vehicle's high-voltage component controller.

8. A vehicle, characterized in that, The collision detection circuit of the vehicle as described in any one of claims 1 to 4.

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