Vehicle collision signal detection device and safe driving control system

Abstract

The present disclosure provides a vehicle collision signal detection device and a safe driving control system, the signal detection device comprising a current signal conversion circuit and a voltage signal processing circuit; the current signal conversion circuit is used for receiving a current pulse signal generated by a vehicle detection device when the vehicle collides, and converting the current pulse signal into a first voltage signal, the duration of the first voltage signal being a first duration; the voltage signal processing circuit is used for receiving the first voltage signal and outputting a collision signal to a vehicle control device to control the triggering of an airbag; the collision signal is a high-level signal, the duration of the high-level signal being a second duration, the second duration being greater than the first duration, and the second duration satisfying a preset value. In the present disclosure, the short current pulse signal generated under the vehicle collision state can be converted into a long-time stable high-level signal in time and automatically, so as to ensure the timely, comprehensive, stable and reliable detection of the collision signal.

Description

Technical Field

[0001] This disclosure relates to the field of safe driving technology, and in particular to a vehicle collision signal detection device and a safe driving control system. Background Technology

[0002] Currently, with the increase in the number of vehicles, the incidence of traffic accidents is also increasing, and the safety of automobiles has gradually become an important topic of concern for consumers. There are various safety measures for vehicles, such as installing seat belts and airbags in the vehicle. These safety devices reduce the degree of injury to passengers and drivers in the event of a traffic accident. Among them, the triggering of airbags can only be carried out after a collision signal is detected. However, the existing detection circuits for current input collision signals on vehicles generally have the following problems: (1) The duration of the pulse signal is short, that is, it does not exist continuously for a long time. If the MCU (Microcontroller Unit) is used for long-term continuous detection, it will lead to problems such as long-term occupation of the MCU, large MCU computation, and increased MCU load; (2) The duration of the pulse signal is short, which can easily lead to missed detection, which can easily cause safety accidents and property damage; (3) The electromagnetic environment on the whole vehicle is complex. The existing detection circuits cannot solve the anti-interference problem, which has poor technical anti-interference ability and is prone to false alarms, causing a bad experience for users. Utility Model Content

[0003] The technical problem to be solved by this disclosure is to overcome the problems of existing technologies, such as short duration of vehicle collision signals, need for long-term uninterrupted continuous detection, easy to miss samples, resulting in safety accidents, property damage, etc., poor anti-interference ability, and inability to guarantee the reliability of the collected signals. The purpose is to provide a vehicle collision signal detection device and a safe driving control system.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] In a first aspect, this disclosure provides a vehicle collision signal detection device for connecting to a vehicle detection device and outputting a collision signal to a vehicle control device, characterized in that the signal detection device includes a current signal conversion circuit and a voltage signal processing circuit that are connected in communication.

[0006] The current signal conversion circuit is used to receive the current pulse signal emitted by the vehicle detection device when the vehicle collision occurs, and convert the current pulse signal into a first voltage signal, the duration of which is a first duration.

[0007] The voltage signal processing circuit is used to receive the first voltage signal sent by the signal conversion circuit and output the collision signal to the vehicle control device to control the airbag triggering.

[0008] The collision signal is a high-level signal, and the duration of the high-level signal is a second duration, which is longer than the first duration and satisfies a preset value.

[0009] This solution proposes a novel vehicle collision signal detection device through ingenious design. It can promptly collect short-duration current pulse signals generated during a vehicle collision and convert them into a first voltage signal. This first voltage signal is then automatically converted into a long-lasting, stable high-level signal by a voltage signal processing circuit. This achieves the automatic conversion of a short-duration current pulse signal into a long-lasting, stable high-level signal, avoiding situations where short pulse signals cannot be reliably detected. This effectively ensures timely, comprehensive, stable, and reliable detection of current pulse signals. The voltage pulse collision signal thus ensures that airbags are triggered promptly and accurately, improving user safety. The detection device also has the advantage of strong anti-interference capability, further improving the reliability of collision signal detection. Furthermore, this device effectively avoids missed collision signal collection, reducing the possibility of safety accidents and potential property damage.

[0010] Meanwhile, based on the high-level signal that is stably output over a long period of time, it is no longer necessary to detect the current pulse signal for a long time without interruption. This effectively reduces the amount of data processing in the voltage signal processing circuit, lightens the load on the voltage signal processing circuit, reduces energy consumption, and also effectively simplifies the overall signal detection process and improves the efficiency of collision signal detection. In addition, the detection device also has the advantages of simple structure and low cost.

[0011] Optionally, the signal detection device further includes a filter circuit connected between the current signal conversion circuit and the voltage signal processing circuit, wherein the output terminal of the voltage signal processing circuit is electrically connected to the input terminal of the filter circuit;

[0012] The filtering circuit is used to filter the first voltage signal so as to output the filtered first voltage signal to the voltage signal processing circuit.

[0013] In this scheme, the first voltage signal obtained by the current signal conversion circuit is filtered by the filtering circuit, which can prevent interference from affecting the working state of the voltage signal processing circuit (such as preventing interference with the working state of the first switching transistor in the voltage signal processing circuit), effectively improving the anti-interference capability of the entire device, thereby improving the reliability of collision signal detection.

[0014] Optionally, the signal detection device further includes a reverse connection protection circuit connected between the current signal conversion circuit and the filter circuit;

[0015] The reverse connection protection circuit is used to prevent the voltage of the internal circuit of the detection device from being output to the outside.

[0016] In this solution, the reasonable setting of the reverse connection protection circuit can effectively prevent the internal circuit voltage from being output to the outside, thereby ensuring the independence and stability of the entire detection device.

[0017] Optionally, the vehicle detection device includes a signal input terminal and a signal output terminal;

[0018] The current signal conversion circuit includes a first resistor, one end of which is electrically connected to the signal input terminal, and the other end of which is electrically connected to the signal output terminal.

[0019] The first resistor is used to convert the current pulse signal input via the vehicle detection device into the first voltage signal.

[0020] Optionally, the filter circuit includes a second resistor and a first capacitor;

[0021] One end of the second resistor is electrically connected to one end of the first resistor, and the other end of the second resistor is electrically connected to one end of the first capacitor, and the other end of the first capacitor is electrically connected to the other end of the first resistor.

[0022] Optionally, the reverse connection protection circuit includes a first diode, the anode of which is electrically connected to the other end of the first resistor, and the cathode of which is electrically connected to one end of the second resistor.

[0023] Optionally, the voltage signal processing circuit includes a first switching transistor, a second capacitor, a second switching transistor, and a second diode;

[0024] The gate of the first switching transistor is electrically connected to the other end of the second resistor and the other end of the first capacitor. The drain of the first switching transistor is electrically connected to the power supply voltage terminal and one end of the second capacitor. The source of the first switching transistor is electrically connected to the other end of the first resistor. The other end of the second capacitor is electrically connected to the power supply voltage terminal, the source of the second switching transistor, and the gate of the second switching transistor. The drain of the second switching transistor is electrically connected to the positive terminal of the second diode and the output terminal of the vehicle collision signal detection device. The negative terminal of the second diode is electrically connected to the negative terminal of the first diode and one end of the second resistor.

[0025] Before the first switch is turned on, the voltage across the second capacitor is the same.

[0026] After the first switch is turned on, there is a voltage difference across the second capacitor, and the second switch is turned on accordingly. The first voltage signal at the drain of the second switch is introduced into the input terminal of the filter circuit through the second diode. At this time, the first switch remains on until the second capacitor is fully charged, so that the drain of the second switch maintains the second duration and outputs the first voltage signal to the output terminal of the vehicle collision signal detection device.

[0027] Optionally, the first switching transistor includes an NMOS (N-Metal-Oxide-Semiconductor) transistor, and the second switching transistor includes a PMOS (P-Metal-Oxide-Semiconductor) transistor.

[0028] And / or,

[0029] The second duration is matched with the capacitance value of the second capacitor.

[0030] In this solution, by adjusting the capacitance value of the second capacitor, the duration of the target voltage signal after the current pulse signal conversion can be adjusted, which allows for more flexible adjustment of the extension time for current pulse signal detection to meet the higher requirements of actual scenarios.

[0031] Optionally, the voltage signal processing circuit further includes a third resistor, a fourth resistor, and a fifth resistor;

[0032] One end of the third resistor is electrically connected to the power supply voltage terminal, and the other end of the third resistor is electrically connected to the drain of the first switching transistor and one end of the second capacitor, respectively.

[0033] One end of the fourth resistor is electrically connected to the power supply voltage terminal and the source of the second switching transistor, the other end of the fourth resistor is electrically connected to the other end of the second capacitor and one end of the fifth resistor, and the other end of the fifth resistor is electrically connected to the gate of the second switching transistor.

[0034] And / or,

[0035] The signal detection device also includes a sixth resistor and a third capacitor;

[0036] One end of the sixth resistor and one end of the third capacitor are electrically connected to the drain of the second switching transistor and the output terminal of the vehicle collision signal detection device, respectively, and the other end of the sixth resistor and the other end of the third capacitor are grounded.

[0037] In a second aspect, this disclosure provides a safe driving control system, which includes a vehicle collision signal detection device as described in the first aspect, as well as a vehicle detection device and a vehicle control device.

[0038] This solution integrates the aforementioned vehicle collision signal detection device, enabling timely, comprehensive, stable, and reliable detection of current pulse signals in the event of a vehicle collision. This effectively improves the overall performance of existing safe driving control systems and ensures the safety and stability of the entire vehicle.

[0039] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0040] The positive and progressive effects of this disclosure are as follows:

[0041] This disclosure proposes a novel vehicle collision signal detection device through ingenious design. It can promptly collect short-duration current pulse signals generated during a vehicle collision and convert them into a first voltage signal. The voltage signal processing circuit then automatically converts the short-duration first voltage signal into a long-term, stable high-level signal. This achieves the automatic conversion of a short-duration current pulse signal into a long-term, stable high-level signal, avoiding situations where reliable detection is impossible due to short pulse signals. This effectively ensures timely, comprehensive, stable, and reliable detection of current pulse signals, thereby guaranteeing that airbags are triggered promptly and accurately, thus improving user safety.

[0042] The detection device also has the advantage of strong anti-interference capability, which further improves the reliability of collision signal detection; the detection device can also effectively avoid the occurrence of missed collision signals, reducing the possibility of safety accidents and potential property damage.

[0043] Meanwhile, based on the high-level signal that is stably output over a long period of time, it is no longer necessary to detect the current pulse signal for a long time without interruption. This effectively reduces the amount of data processing in the voltage signal processing circuit, lightens the load on the voltage signal processing circuit, reduces energy consumption, and also effectively simplifies the overall signal detection process and improves the efficiency of collision signal detection. In addition, the detection device also has the advantages of simple structure and low cost. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the vehicle collision signal detection device according to Embodiment 1 of this disclosure;

[0045] Figure 2 This is a schematic diagram of the vehicle collision signal detection device according to Embodiment 2 of this disclosure;

[0046] Figure 3 This is a circuit diagram of the vehicle collision signal detection device according to Embodiment 2 of this disclosure;

[0047] Figure 4 This is the safety driving control system of Embodiment 3 of this disclosure. Detailed Implementation

[0048] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0049] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0050] Example 1

[0051] The vehicle collision signal detection device in this embodiment is used to connect to the vehicle detection device and output a collision signal to the vehicle control device.

[0052] Specifically, such as Figure 1 As shown, the vehicle collision signal detection device in this embodiment includes a current signal conversion circuit 1 and a voltage signal processing circuit 2 that are connected in communication.

[0053] The current signal conversion circuit is used to receive the current pulse signal emitted by the vehicle detection device when a vehicle collision occurs, and convert the current pulse signal into a first voltage signal. The duration of the first voltage signal is a first duration.

[0054] The current pulse signal is a short-duration current signal. For example, when a vehicle is involved in a collision, the preset detection module in the vehicle (such as the vehicle airbag control unit) generates a circuit trigger pulse with a current pulse signal of 1.75A and a first duration of 0.5ms to 0.9ms.

[0055] The voltage signal processing circuit is used to receive the first voltage signal sent by the signal conversion circuit and output a collision signal to the vehicle control device to control the triggering of the airbag;

[0056] The collision signal is a high-level signal, and the duration of the high-level signal is the second duration. The second duration is longer than the first duration, and the second duration satisfies a preset value.

[0057] At this point, the short-duration current pulse signal is converted into a short-duration first voltage signal; if the duration of the current pulse signal is 0.5ms to 0.9ms, the duration of the first voltage signal obtained at this time is also 0.5ms to 0.9ms.

[0058] Based on the received short-term first voltage signal, the voltage signal processing circuit 2 outputs a collision signal. This collision signal is a long-term stable high-level signal, which extends the duration of the current pulse-type collision signal and ensures timely, comprehensive, stable and reliable collision signal detection.

[0059] Among them, the voltage signal processing circuit 2 includes, but is not limited to, an MCU.

[0060] In this embodiment, a novel vehicle collision signal detection device is proposed through ingenious design. It can promptly collect short-time current pulse signals generated when a vehicle collision occurs and convert them into a first voltage signal. Then, the voltage signal processing circuit 2 automatically converts the short-time first voltage signal into a long-term stable high-level signal. This realizes the automatic conversion of a short-time current pulse signal into a long-term stable high-level signal, avoiding the situation where the pulse signal is too short to be reliably detected. It effectively ensures the timeliness, comprehensiveness, stability and reliability of current pulse signal detection, thereby ensuring that the airbag is triggered in a timely and accurate manner to improve user safety.

[0061] The vehicle collision signal detection device also has the advantage of strong anti-interference capability, which further improves the reliability of collision signal detection; the detection device can also effectively avoid the occurrence of missed collision signals, reducing the possibility of safety accidents and potential property damage.

[0062] Meanwhile, based on the high-level signal that is stably output over a long period of time, it is no longer necessary to detect the current pulse signal for a long time without interruption. This effectively reduces the amount of data processing in the voltage signal processing circuit, lightens the load on the voltage signal processing circuit, reduces energy consumption, and also effectively simplifies the overall signal detection process and improves the efficiency of collision signal detection. In addition, the detection device also has the advantages of simple structure and low cost.

[0063] Example 2

[0064] like Figure 2 As shown, the vehicle collision signal detection device in this embodiment is a further improvement on embodiment 1, specifically:

[0065] In one feasible embodiment, the vehicle collision signal detection device further includes a filter circuit 3 connected between the current signal conversion circuit 1 and the voltage signal processing circuit 2, wherein the output terminal of the voltage signal processing circuit 2 is electrically connected to the input terminal of the filter circuit 3.

[0066] The filter circuit 3 is used to filter the first voltage signal so that the filtered first voltage signal is output to the voltage signal processing circuit 2.

[0067] Among them, the filter circuit 3 includes, but is not limited to, an integral filter.

[0068] In this scheme, the first voltage signal obtained by the current signal conversion circuit 1 is filtered by the filter circuit 3, which can prevent interference from affecting the working state of the voltage signal processing circuit 2 (such as preventing interference with the working state of the first switching transistor in the voltage signal processing circuit 2), effectively improving the anti-interference capability of the entire device, thereby improving the reliability of collision signal detection.

[0069] In one feasible embodiment, the vehicle collision signal detection device further includes a reverse connection protection circuit 4 connected between the current signal conversion circuit 1 and the filter circuit 3;

[0070] The reverse connection protection circuit 4 is used to prevent the voltage of the internal circuit in the detection device from being output to the outside.

[0071] In this scheme, the reasonable setting of the reverse connection protection circuit 4 can effectively prevent the internal circuit voltage from being output to the outside, thereby ensuring the independence and stability of the entire detection device.

[0072] In a feasible solution, such as Figure 3 As shown, the vehicle detection device includes a signal input terminal (Signal In) and a signal output terminal (Signal Out).

[0073] The current signal conversion circuit 1 includes a first resistor R1, one end of which is electrically connected to the signal input terminal Signal In, and the other end of which is electrically connected to the signal output terminal Signal Out.

[0074] The first resistor R1 is used to convert the current pulse signal input via the vehicle detection device into a first voltage signal.

[0075] In one feasible embodiment, the filter circuit 3 includes a second resistor R2 and a first capacitor C1;

[0076] One end of the second resistor R2 is electrically connected to one end of the first resistor R1, and the other end of the second resistor R2 is electrically connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is electrically connected to the other end of the first resistor R1.

[0077] In one feasible embodiment, the reverse connection protection circuit 4 includes a first diode D1, the positive terminal of which is electrically connected to the other end of a first resistor R1, and the negative terminal of which is electrically connected to one end of a second resistor R2.

[0078] In one feasible embodiment, the voltage signal processing circuit 2 includes a first switch M1, a second capacitor C2, a second switch M2, and a second diode D2;

[0079] The gate of the first switching transistor M1 is electrically connected to the other end of the second resistor R2 and the other end of the first capacitor C1. The drain of the first switching transistor M1 is electrically connected to the power supply voltage terminal and one end of the second capacitor C2. The source of the first switching transistor M1 is electrically connected to the other end of the first resistor R1. The other end of the second capacitor C2 is electrically connected to the power supply voltage terminal, the source of the second switching transistor M2, and the gate of the second switching transistor M2. The drain of the second switching transistor M2 is electrically connected to the positive terminal of the second diode D2 and the output terminal of the vehicle collision signal detection device. The negative terminal of the second diode D2 is electrically connected to the negative terminal of the first diode D1 and one end of the second resistor R2.

[0080] Before the first switch M1 is turned on, the voltage across the second capacitor C2 is the same.

[0081] After the first switch M1 is turned on, there is a voltage difference across the second capacitor C2, and the second switch M2 is turned on accordingly. The first voltage signal at the drain of the second switch M2 is introduced into the input terminal of the filter circuit 3 through the second diode D2. At this time, the first switch M1 remains on until the second capacitor C2 is fully charged, so that the drain of the second switch M2 maintains a second duration to output the first voltage signal to the output terminal of the vehicle collision signal detection device.

[0082] In one feasible embodiment, the first switch M1 includes an NMOS transistor, and the second switch M2 includes a PMOS transistor;

[0083] In one feasible embodiment, the second duration is matched with the capacitance value of the second capacitor C2.

[0084] In this solution, by adjusting the capacitance value of the second capacitor C2, the duration of the target voltage signal after the current pulse signal conversion can be adjusted, which allows for more flexible adjustment of the extension time for current pulse signal detection to meet the requirements of more demanding real-world scenarios.

[0085] In one feasible embodiment, the voltage signal processing circuit 2 further includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5;

[0086] One end of the third resistor R3 is electrically connected to the power supply voltage terminal, and the other end of the third resistor R3 is electrically connected to the drain of the first switching transistor M1 and one end of the second capacitor C2, respectively.

[0087] One end of the fourth resistor R4 is electrically connected to the power supply voltage terminal and the source of the second switch M2, respectively. The other end of the fourth resistor R4 is electrically connected to the other end of the second capacitor C2 and one end of the fifth resistor R5, respectively. The other end of the fifth resistor R5 is electrically connected to the gate of the second switch M2.

[0088] In one feasible embodiment, the signal detection device also includes a sixth resistor R6 and a third capacitor C3;

[0089] One end of the sixth resistor R6 and one end of the third capacitor C3 are electrically connected to the drain of the second switch M2 and the output terminal of the vehicle collision signal detection device, respectively. The other ends of the sixth resistor R6 and the third capacitor C3 are grounded.

[0090] Of course, the vehicle collision signal detection device may also include a data storage device and an over-temperature protection circuit. For example, the data storage device is used to store relevant data generated throughout the detection process; the over-temperature protection circuit is used to detect the temperature of the device's operating environment and perform over-temperature protection processing when over-temperature occurs; other functional modules may also be included, which can be set or adjusted according to actual needs, and will not be elaborated here.

[0091] The following is combined with Figure 3 The working principle of the vehicle collision signal detection device in this embodiment is explained in detail below:

[0092] (1) When a vehicle is involved in a collision, the current pulse signal emitted by the vehicle detection device; wherein the current pulse signal is 1.75A and the first duration is 0.5ms ~ 0.9ms;

[0093] (2) The current pulse signal passes through the first resistor R1 and generates a voltage difference across the resistor DE of the first resistor R1. That is, the current pulse signal is converted into the corresponding first voltage signal through the current signal conversion circuit. The duration of the first voltage signal is the same as that of the current pulse signal, which is 0.5ms ~ 0.9ms.

[0094] (3) After the first voltage signal passes through the first diode D1 for reverse connection protection, it passes through the filter circuit 3 composed of the second resistor R2 and the first capacitor C1, and then passes through the voltage signal processing circuit 2.

[0095] (4) For voltage signal processing circuit 2: Before the first switch M1 is turned on, the voltage on both sides of the second capacitor C2 is the same, and there is no charge stored inside the second capacitor C2.

[0096] When the first switch M1 (NMOS transistor) is turned on, the voltage at position A on the left side of the second capacitor C2 is pulled down. At this time, there is a voltage difference on both sides of the second capacitor C2. Utilizing the charging characteristics of the capacitor, the voltage at position B on the right side of the second capacitor C2 will also be pulled down.

[0097] When the voltage at point B on the right side of the second capacitor C2 is pulled low, the second switching transistor M2 (PMOS transistor) also turns on, and the drain of the second switching transistor M2 ( Figure 3 The voltage VCC at point C in the signal processing circuit (such as the MCU GPIO general-purpose input / output port) reaches a high level for acquisition.

[0098] Since the duration of the current pulse signal is only 0.5ms to 0.9ms, if no corresponding processing measures are taken, the first switch M1 and the second switch M2 will be disconnected after this period, thus still failing to meet the detection requirements of the collision signal.

[0099] In this embodiment, a clever circuit design was implemented, specifically based on the second diode D2. Figure 3 The voltage at point C is introduced to the input terminal, forming a self-locking circuit, thus ensuring that the first switching transistor M1 can continue to conduct, thereby guaranteeing... Figure 3 The high-level output at point C continues until the second capacitor C2 is fully charged.

[0100] Based on this, a short-duration current pulse signal can be automatically converted into a long-term stable high-level signal, avoiding the situation where the pulse signal is too short to be reliably detected. This effectively ensures the timely, comprehensive, stable and reliable detection of the current pulse signal, thus guaranteeing the safety of the entire vehicle.

[0101] Example 3

[0102] like Figure 4 As shown, the safe driving control system 100 of this embodiment includes the vehicle collision signal detection device 200 in embodiment 1 or embodiment 2, as well as the vehicle detection device 300 and the vehicle control device 400, etc.; of course, it may also include other components, which can be specifically configured according to actual needs, and will not be described in detail here.

[0103] Among them, after the vehicle collision signal detection device reliably detects the current pulse signal under collision conditions, it can trigger the airbag in a timely and accurate manner, thereby effectively reducing the impact on the people in the vehicle when a traffic accident occurs and improving the safety of the people in the vehicle.

[0104] The safety driving control system in this embodiment integrates the aforementioned vehicle collision signal detection device, enabling timely, comprehensive, stable, and reliable detection of current pulse signals in the event of a vehicle collision. This effectively improves the overall performance of existing safety driving control systems, ensuring user safety and enhancing user experience.

[0105] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A vehicle collision signal detection device, used to connect to a vehicle detection device and output a collision signal to a vehicle control device, characterized in that, The signal detection device includes a current signal conversion circuit and a voltage signal processing circuit that are connected in communication. The current signal conversion circuit is used to receive the current pulse signal emitted by the vehicle detection device when the vehicle collision occurs, and convert the current pulse signal into a first voltage signal, the duration of which is a first duration. The voltage signal processing circuit is used to receive the first voltage signal sent by the signal conversion circuit and output the collision signal to the vehicle control device to control the airbag triggering. The collision signal is a high-level signal, and the duration of the high-level signal is a second duration, which is longer than the first duration and satisfies a preset value.

2. The vehicle collision signal detection device as described in claim 1, characterized in that, The vehicle collision signal detection device further includes a filter circuit connected between the current signal conversion circuit and the voltage signal processing circuit, wherein the output terminal of the voltage signal processing circuit is electrically connected to the input terminal of the filter circuit. The filtering circuit is used to filter the first voltage signal so as to output the filtered first voltage signal to the voltage signal processing circuit.

3. The vehicle collision signal detection device as described in claim 2, characterized in that, The vehicle collision signal detection device also includes a reverse connection protection circuit connected between the current signal conversion circuit and the filter circuit. The reverse connection protection circuit is used to prevent the voltage of the internal circuit of the vehicle collision signal detection device from being output to the outside.

4. The vehicle collision signal detection device as described in claim 3, characterized in that, The vehicle detection device includes a signal input terminal and a signal output terminal; The current signal conversion circuit includes a first resistor, one end of which is electrically connected to the signal input terminal, and the other end of which is electrically connected to the signal output terminal. The first resistor is used to convert the current pulse signal input via the vehicle detection device into the first voltage signal.

5. The vehicle collision signal detection device as described in claim 4, characterized in that, The filter circuit includes a second resistor and a first capacitor; One end of the second resistor is electrically connected to one end of the first resistor, and the other end of the second resistor is electrically connected to one end of the first capacitor, and the other end of the first capacitor is electrically connected to the other end of the first resistor.

6. The vehicle collision signal detection device as described in claim 5, characterized in that, The reverse connection protection circuit includes a first diode, the positive terminal of which is electrically connected to the other end of the first resistor, and the negative terminal of which is electrically connected to one end of the second resistor.

7. The vehicle collision signal detection device as described in claim 6, characterized in that, The voltage signal processing circuit includes a first switching transistor, a second capacitor, a second switching transistor, and a second diode; The gate of the first switching transistor is electrically connected to the other end of the second resistor and the other end of the first capacitor. The drain of the first switching transistor is electrically connected to the power supply voltage terminal and one end of the second capacitor. The source of the first switching transistor is electrically connected to the other end of the first resistor. The other end of the second capacitor is electrically connected to the power supply voltage terminal, the source of the second switching transistor, and the gate of the second switching transistor. The drain of the second switching transistor is electrically connected to the positive terminal of the second diode and the output terminal of the vehicle collision signal detection device. The negative terminal of the second diode is electrically connected to the negative terminal of the first diode and one end of the second resistor. Before the first switch is turned on, the voltage across the second capacitor is the same. After the first switch is turned on, there is a voltage difference across the second capacitor, and the second switch is turned on accordingly. The first voltage signal at the drain of the second switch is introduced into the input terminal of the filter circuit through the second diode. At this time, the first switch remains on until the second capacitor is fully charged, so that the drain of the second switch maintains the second duration and outputs the first voltage signal to the output terminal of the vehicle collision signal detection device.

8. The vehicle collision signal detection device as described in claim 7, characterized in that, The first switch includes an NMOS transistor, and the second switch includes a PMOS transistor; And / or, The second duration is matched with the capacitance value of the second capacitor.

9. The vehicle collision signal detection device as described in claim 7 or 8, characterized in that, The voltage signal processing circuit also includes a third resistor, a fourth resistor, and a fifth resistor; One end of the third resistor is electrically connected to the power supply voltage terminal, and the other end of the third resistor is electrically connected to the drain of the first switching transistor and one end of the second capacitor, respectively. One end of the fourth resistor is electrically connected to the power supply voltage terminal and the source of the second switching transistor, the other end of the fourth resistor is electrically connected to the other end of the second capacitor and one end of the fifth resistor, and the other end of the fifth resistor is electrically connected to the gate of the second switching transistor. And / or, The signal detection device also includes a sixth resistor and a third capacitor; One end of the sixth resistor and one end of the third capacitor are electrically connected to the drain of the second switching transistor and the output terminal of the vehicle collision signal detection device, respectively, and the other end of the sixth resistor and the other end of the third capacitor are grounded.

10. A safe driving control system, characterized in that, The safe driving control system includes a vehicle collision signal detection device as described in any one of claims 1-9, as well as a vehicle detection device and a vehicle control device.

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