Collision signal detection circuit and method and vehicle

Abstract

The invention provides a collision signal detection circuit, which is applied to the field of Internet of Vehicles, and comprises a first detection circuit, the control end of which is used for being connected with a collision signal input end, and the collision signal input end is used for receiving a collision signal; the control end of the second detection circuit is connected with the output end of the first detection circuit, the input end of the second detection circuit is used for being connected with a collision signal input end, and the output end of the second detection circuit is used for being connected with the microcontroller; wherein the first detection circuit is used for sending a collision verification signal to the control end of the second detection circuit when a collision signal received by the collision signal input end meets a first preset condition; the control end of the second detection circuit is used for controlling the second detection circuit to be switched on when receiving the collision verification signal, so that the collision signal received by the collision signal input end is transmitted to the microcontroller, and the validity of the collision signal is judged through the microcontroller. The detection precision and practicability of the collision signal detection circuit can be greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a collision signal detection circuit, method and vehicle. Background Art

[0002] The airbag in a vehicle, as a protection device of the vehicle, will send out collision signals in real time. The in-vehicle wireless terminal (Telematics control Box, TBOX) of the vehicle will take some safety measures according to the detected collision signals, such as making an emergency call.

[0003] Currently, the collision signal output by the airbag is a single-bus signal, which is connected to multiple components, and the power supplies of each component are not unified. During the sleep process and power-on process of the vehicle, the TBOX has the ability to detect the collision signal. During the power-on process of the vehicle, the power-on sequence of each component is different, resulting in fluctuations in the level of the collision signal. The TBOX will misidentify the fluctuating level as a collision signal, thus causing the safety measures to be triggered erroneously. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a collision signal detection circuit, method and vehicle to solve the technical problem that the TBOX misdetects the collision signal.

[0005] Based on the above purpose, the present invention provides a collision signal detection circuit, including:

[0006] A first detection circuit, whose control end is used to connect to the collision signal input end, and the collision signal input end is used to receive the collision signal;

[0007] A second detection circuit, whose control end is connected to the output end of the first detection circuit, whose input end is used to connect to the collision signal input end, and whose output end is used to connect to the microcontroller;

[0008] Wherein, the first detection circuit is used to send a collision verification signal to the control end of the second detection circuit when the collision signal received at the collision signal input end meets the first preset condition;

[0009] The control end of the second detection circuit is used to control the second detection circuit to conduct when receiving the collision verification signal, so that the collision signal received at the collision signal input end is transmitted to the microcontroller, and the microcontroller judges the validity of the collision signal.

[0010] Further, the control end of the second detection circuit and the output end of the first detection circuit are both connected to the microcontroller, and the output end of the first detection circuit sends the collision verification signal to the control end of the second detection circuit through the microcontroller.

[0011] Further, the first detection circuit includes a judgment circuit and an output circuit. The judgment circuit includes a voltage division module, and the output circuit includes a first switch module. Both the judgment circuit and the output circuit are connected to a first power supply. One end of the voltage division module is connected to the input end of the first switch module, and the other end is respectively connected to the control end of the first switch module and the collision signal input end. The output end of the first switch module is connected to the output end of the first detection circuit;

[0012] When the pressure difference between the power signal of the first power supply and the collision signal at the collision signal input end is greater than a first preset value, the collision signal meets the first preset condition. The pressure difference across the voltage division module causes the first switch module to conduct, and the output end of the first detection circuit outputs the collision verification signal.

[0013] Further, the judgment circuit further includes an anti-reverse module. One end of the anti-reverse module is connected to the collision signal input end, and the other end is connected to the voltage division module.

[0014] Further, the first detection circuit further includes a conversion circuit. The conversion circuit includes a second power supply, a first resistor, and a second switch module connected in series. The output end of the second switch module is grounded, and the control end of the second switch module is connected to the output end of the output circuit. An output node is provided between the first resistor and the second switch module, and the output node is connected to the output end of the first detection circuit;

[0015] When the output circuit outputs the collision verification signal to the control end of the second switch module, the second switch module conducts, and the output node outputs a conduction signal to the control end of the second detection circuit.

[0016] Further, the second detection circuit includes a third switch module. The control end of the third switch module is connected to the control end of the second detection circuit, the input end of the third switch module is connected to the input end of the second detection circuit, and the output end of the third switch module is connected to the output end of the second detection circuit.

[0017] Based on the same inventive concept, the present application further provides a collision signal detection method, which is applied to the microcontroller as described above. The method includes:

[0018] Judging whether the collision signal meets a first preset condition through the first detection circuit;

[0019] In response to determining that the collision signal meets the first preset condition, receiving the collision signal through the second detection circuit to judge whether the collision signal is valid.

[0020] Further, the collision signal includes at least one continuous low-level signal, rising edge signal, high-level signal, and falling edge signal;

[0021] Determining whether the collision signal is valid includes: determining whether the low-level signal of the collision signal is valid;

[0022] After determining whether the collision signal is valid, it further includes:

[0023] In response to determining that the low-level signal is valid, and the duration is greater than a preset duration, and there are a rising edge signal, a high-level signal, and a falling edge signal after the low-level signal, an emergency call is triggered.

[0024] Further, determining whether the low-level signal meets a first preset condition through the first detection circuit includes:

[0025] In response to the vehicle being powered on, after a preset duration, it is determined through the first detection circuit whether the low-level signal meets the first preset condition.

[0026] Based on the same inventive concept, the present application further provides a vehicle, including the collision signal detection circuit and the microcontroller as described above. The microcontroller includes a memory, a processor, and a computer program stored on the memory and running on the processor. When the processor executes the program, the method as described above is implemented.

[0027] As can be seen from the above, a collision signal detection circuit provided by the present invention determines whether the collision signal received at the collision signal input end meets the first preset condition through the control end of the first detection circuit, and when it is confirmed that the collision signal meets the first preset condition, a collision verification signal is sent to the control end of the second detection circuit to enable the second detection circuit to conduct. The microcontroller receives the validity of the collision signal transmitted from the collision signal input end through the second detection circuit; the present application completes a primary confirmation of the collision signal through the first detection circuit, and after the collision signal is confirmed by the first detection circuit, the microcontroller completes a secondary confirmation of the collision signal, realizing a double confirmation of the collision signal, effectively avoiding misidentification of the collision signal, and further effectively avoiding the situation where safety measures are mis-triggered, greatly improving the detection accuracy and practicality of the collision signal detection circuit. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 It is a waveform schematic diagram of a collision signal;

[0030] Figure 2 It is a waveform schematic diagram of collision signals when the vehicle is in different stages;

[0031] Figure 3 It is a schematic structural diagram of the collision signal detection circuit according to the embodiment of the present invention Figure 1 ;

[0032] Figure 4 It is a schematic structural diagram of the collision signal detection circuit according to the embodiment of the present invention Figure 2 ;

[0033] Figure 5 It is a schematic structural diagram of the first detection circuit according to the embodiment of the present invention Figure 1 ;

[0034] Figure 6 It is a schematic structural diagram of the first detection circuit according to the embodiment of the present invention Figure 2 ;

[0035] Figure 7 It is a schematic structural diagram of the second detection circuit according to the embodiment of the present invention Figure 1 ;

[0036] Figure 8 It is a schematic structural diagram of the second detection circuit according to the embodiment of the present invention Figure 2 ;

[0037] Figure 9 It is a schematic flow structure diagram of a collision signal detection method according to the embodiment of the present invention;

[0038] Figure 10 It is a schematic structural diagram of a collision signal detection device according to the embodiment of the present invention;

[0039] Figure 11 It is a schematic structural diagram of an electronic device according to the embodiment of the present invention.

[0040] In the figure: 100, the first detection circuit; 110, the control terminal of the first detection circuit; 120, the output terminal of the first detection circuit; 130, the judgment circuit; 131, the voltage division module; 132, the reverse connection prevention module; 140, the output circuit; 141, the first switch module; 150, the first power supply; 160, the conversion circuit; 161, the second power supply; 162, the first resistor; 163, the second switch module; 164, the output node; 200, the second detection circuit; 210, the control terminal of the second detection circuit; 220, the third switch module; 300, the collision signal input terminal; 400, the microcontroller. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0042] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be the ordinary meanings understood by those of ordinary skill in the technical field to which this application belongs. The "first", "second" and similar terms used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] The airbag in a vehicle, as a protection device of the vehicle, will emit collision signals in real time. The vehicle's TBOX will detect the collision signals and take some safety measures when abnormal collision signals are detected, such as: making an emergency call.

[0044] The collision signal output by the airbag is usually a Pulse Width Modulation (PWM) signal. As Figure 1 shown, this PWM signal usually outputs a periodic signal with T1 = 20 ms and T2 = 100 ms. When a vehicle collides, it outputs a periodic signal with T1 = 200 ms and T2 = 100 ms for 3 cycles, and then returns to normal.

[0045] As Figure 2As shown, the collision signal output by the airbag is a single-bus signal, which is connected to multiple components, and the power supplies of each component are not unified. During the sleep process and power-on process of the vehicle, the TBOX has the ability to detect the collision signal. During the power-on process of the vehicle, due to the different power-on timings of each component, the level of the collision signal fluctuates, and the TBOX will misidentify the fluctuating level as a collision signal, thereby causing the safety measures to be triggered erroneously.

[0046] Based on this, the present application proposes a collision signal detection circuit, method and vehicle to improve the detection accuracy of the collision signal and solve the problem of misidentifying the collision signal during the sleep and initial power-on of the vehicle.

[0047] The following will detail the present application through one or more specific embodiments.

[0048] In some embodiments, a collision signal detection circuit, as Figure 3 shown, includes:

[0049] A first detection circuit 100, whose control terminal 110 is used to connect to the collision signal input terminal 300, and the collision signal input terminal 300 is used to receive the collision signal;

[0050] A second detection circuit 200, whose control terminal 210 is connected to the output terminal 120 of the first detection circuit 100, whose input terminal is used to connect to the collision signal input terminal 300, and whose output terminal is used to connect to the microcontroller 400;

[0051] Wherein, the first detection circuit 100 is used to send a collision verification signal to the control terminal 210 of the second detection circuit 200 when the collision signal received by the collision signal input terminal 300 meets the first preset condition;

[0052] The control terminal 210 of the second detection circuit 200 is used to control the second detection circuit 200 to conduct when receiving the collision verification signal, so that the collision signal received by the collision signal input terminal 300 is transmitted to the microcontroller 400, and the microcontroller 400 judges the validity of the collision signal.

[0053] Specifically, the control terminal 110 of the first detection circuit 100 is used to detect the collision signal received by the collision signal input terminal 300. When the collision signal meets the first preset condition, the control terminal 110 of the first detection circuit 100 controls the first detection circuit 100 to output the collision verification signal. The output terminal 120 of the first detection circuit 100 is connected to the control terminal 210 of the second detection circuit 200. When the control terminal 210 of the second detection circuit 200 receives the collision verification signal, it controls the second detection circuit 200 to conduct. The microcontroller 400 can receive the collision signal through the second detection circuit 200, and then can detect the collision signal. The detection of the collision signal by the microcontroller 400 is the detection of the second preset condition. When the collision signal meets the second preset condition, it can be determined that the collision signal is valid.

[0054] When the collision signal does not meet the first preset condition, the output terminal 120 of the first detection circuit 100 does not output the collision verification signal. Correspondingly, the microcontroller 400 cannot receive the collision signal, and thus will not judge the validity of the collision signal.

[0055] Exemplarily, the first preset condition is that the voltage difference between the collision signal and the vehicle power supply bus is greater than 3 volts. Then, the control terminal 110 of the first detection circuit 100 is used to control the first detection circuit 100 to send the collision verification signal to the second detection circuit 200 when the voltage difference between the collision signal and the vehicle power supply bus is greater than 3 volts. The controller of the first detection circuit 100 functions to detect whether the collision signal meets the first preset condition.

[0056] Exemplarily, the second preset condition is that the value of the collision signal is less than 3 volts. Then, the microcontroller 400 detects the value of the received collision signal. If the value of the collision signal is less than 3 volts, it is determined that the collision signal is valid.

[0057] It should be noted that the output terminal 120 of the first detection circuit 100 and the control terminal 210 of the second detection circuit 200 can be directly connected or connected through other components, as long as the output terminal 120 of the first detection circuit 100 can affect the on / off state of the second detection circuit 200.

[0058] In addition, the microcontroller 400 belongs to the vehicle's TBOX. The TBOX includes a connected microcontroller 400 and a communication module. The microcontroller 400 is used to control the communication module to make an emergency call. The TBOX realizes the detection of the collision signal and the triggering of safety measures through the microcontroller 400 and the communication module.

[0059] In this embodiment, the control terminal 110 of the first detection circuit 100 is used to determine whether the collision signal received by the collision signal input terminal 300 meets the first preset condition. When it is confirmed that the collision signal meets the first preset condition, a collision verification signal is sent to the control terminal 210 of the second detection circuit 200 to turn on the second detection circuit 200. The microcontroller 400 receives the validity of the collision signal transmitted by the collision signal input terminal 300 through the second detection circuit 200. In this application, the first detection circuit 100 completes the primary confirmation of the collision signal. After the collision signal is confirmed by the first detection circuit 100, the microcontroller 400 completes the secondary confirmation of the collision signal, realizing the double confirmation of the collision signal, effectively avoiding the misidentification of the collision signal, and further effectively avoiding the situation where the safety measures are triggered by mistake, greatly improving the detection accuracy and practicability of the collision signal detection circuit.

[0060] The above embodiment clarifies the functions and connection conditions of the first detection circuit 100 and the second detection circuit 200. The following describes in detail the further connection conditions between the first detection circuit 100 and the second detection circuit 200 and the microcontroller 400.

[0061] In some embodiments, as Figure 4 shown, the control terminal 210 of the second detection circuit 200 and the output terminal 120 of the first detection circuit 100 are both connected to the microcontroller 400. The output terminal 120 of the first detection circuit 100 sends the collision verification signal to the control terminal 210 of the second detection circuit 200 through the microcontroller 400.

[0062] Specifically, the output terminal 120 of the first detection circuit 100 is connected to the control terminal 210 of the second detection circuit 200 through the microcontroller 400. The microcontroller 400 is used to send a corresponding signal to the control terminal 210 of the second detection circuit 200 when receiving the collision verification signal sent by the output terminal 120 of the first detection circuit 100, so as to turn on the second detection circuit 200, and then enable the microcontroller 400 to receive the collision signal through the second detection circuit 200 and detect the received collision signal.

[0063] In this embodiment, the output terminal 120 of the first detection circuit 100 is connected to the control terminal 210 of the second detection circuit 200 through the microcontroller 400, which not only does not affect the detection efficiency of the collision signal detection circuit, but also can avoid a loop formed by directly connecting the output terminal 120 of the first detection circuit 100 and the control terminal 210 of the second detection circuit 200, resulting in power waste, contributing to power saving and enhancing the practicability of the collision signal detection circuit. In addition, the direct connection between the first detection circuit 100 and the microcontroller 400 enables the microcontroller 400 to detect the collision signal in real time, which is beneficial to improving the detection timeliness of the microcontroller 400 for the collision signal.

[0064] The above embodiment clarifies the specific connection structure of the first detection circuit 100 and the second detection circuit 200. The following will describe the specific structure of the first detection circuit 100 in detail.

[0065] In some embodiments, as Figure 5 shown, the first detection circuit 100 includes a judgment circuit 130 and an output circuit 140. The judgment circuit 130 includes a voltage division module 131, and the output circuit 140 includes a first switch module 141. Both the judgment circuit 130 and the output circuit 140 are connected to a first power supply 150. One end of the voltage division module 131 is connected to the input terminal of the first switch module 141, and the other end is respectively connected to the control terminal of the first switch module 141 and the collision signal input terminal 300. The output terminal of the first switch module 141 is connected to the output terminal 120 of the first detection circuit 100;

[0066] When the pressure difference between the power signal of the first power supply 150 and the collision signal of the collision signal input terminal 300 is greater than a first preset value, the collision signal meets the first preset condition. The pressure difference across the voltage division module 131 causes the first switch module 141 to conduct, and the output terminal 120 of the first detection circuit 100 outputs the collision verification signal.

[0067] Specifically, the input end of the first switch module 141 is connected to the first power supply 150. One end of the voltage dividing module 131 is connected to the input end of the first switch module 141 to be connected to the first power supply 150. The end of the voltage dividing module 131 connected to the control end of the first switch module 141 is also connected to the collision signal input end 300 to detect whether the collision signal received by the collision signal input end 300 meets the first preset condition. The voltage dividing module 131 is the main structure of the judgment circuit 130. When the voltage difference between the first power supply 150 and the collision signal is greater than the first preset value, that is, the voltage of the first power supply 150 is greater than the voltage of the collision signal and exceeds the first preset value, the voltage difference across the voltage dividing module 131 is also greater than a certain value (the voltage of the end of the voltage dividing module 131 connected to the control end of the first switch module 141 is less than the voltage of the end of the voltage dividing module connected to the input end of the first switch module 141). This value can be the conduction voltage of the first switch module 141, that is, the voltage difference between the input end and the control end of the first switch module 141 is greater than the conduction voltage of the first switch module 141. Correspondingly, the control end of the first switch module 141 controls the first switch module 141 to conduct, the output end of the first switch module 141 is conducted with the first power supply 150, and the output end 120 of the first detection circuit 100 can output an electrical signal, and this electrical signal is the collision verification signal.

[0068] In addition, when the collision signal is greater than the power supply signal of the first power supply 150, that is, the voltage of the collision signal is greater than the voltage of the first power supply 150, the voltage of the end of the voltage dividing module 131 connected to the control end of the first switch module 141 is greater than the voltage of the end of the voltage dividing module 131 connected to the input end of the first switch module 141. The voltage of the control end of the first switch module 141 is greater than the voltage of the input end of the first switch module 141. The control end of the first switch module 141 controls the first switch module 141 to turn off. Correspondingly, the output circuit 140 turns off, and the output circuit 140 cannot output the collision verification signal.

[0069] The resistance value of the voltage dividing module 131, the resistance value of the judgment circuit 130, and the conduction voltage of the first switch module 141 can all be adjusted according to the first preset condition, so that the judgment circuit 130 can control the first switch module 141 to conduct when the collision signal reaches the first preset condition, and further the output circuit 140 can output the collision verification signal.

[0070] It should be noted that the voltage dividing module 131 can be a resistor, and the first switching module 141 can be a triode.

[0071] Exemplarily, the first preset condition is that the voltage difference between the first power supply 150 and the collision signal is greater than 3 volts, and the conduction voltage of the first switching module 141 is 3 volts. Then, when the voltage difference between the first power supply 150 and the collision signal is greater than 3 volts, the voltage difference across the voltage dividing module 131 is greater than 3 volts. Correspondingly, the voltage difference between the control terminal and the input terminal of the first switching module 141 is greater than 3 volts, and the first switching module 141 conducts.

[0072] Another example, the first preset condition is that the voltage difference between the first power supply 150 and the collision signal is greater than 3 volts, and the conduction voltage of the first switching module 141 is 1 volt. Then, a voltage dividing resistor can be set on the judgment circuit 130. The voltage dividing resistor is located between the voltage dividing module 131 and the collision signal input terminal 300. When the resistance of the voltage dividing module 131 is 10 ohms, the resistance of the voltage dividing resistor is set to 20 ohms. In this way, when the voltage difference between the first power supply 150 and the collision signal is 3 volts, the voltage across the voltage dividing module 131 is 1 volt. When the voltage difference between the first power supply 150 and the collision signal is greater than 3 volts, the voltage across the voltage dividing module 131 is greater than 1 volt. Correspondingly, the voltage difference between the control terminal and the input terminal of the first switching module 141 is greater than 1 volt, and the first switching module 141 conducts.

[0073] Another example, the first preset condition is that the voltage difference between the first power supply 150 and the collision signal is greater than 3 volts. There is a voltage dividing resistor on the judgment circuit 130 between the voltage dividing module 131 and the collision signal input terminal 300. The resistance of the voltage dividing module 131 is 10 ohms, the resistance of the voltage dividing resistor is 20 ohms, and the conduction voltage of the first switching module 141 is 1 volt. On this basis, to change the first preset condition to that the voltage difference between the first power supply 150 and the collision signal is greater than 5 volts, the resistance of the voltage dividing module 131 needs to be reduced to 5 ohms. When the voltage difference between the first power supply 150 and the collision signal is greater than 5 volts, the voltage difference across the voltage dividing module 131 is greater than 5 volts × 5 ohms / (20 ohms + 5 ohms) = 1 volt.

[0074] It can be seen from this that based on the judgment circuit 130, the first preset condition can be changed by changing the resistance value of the voltage dividing module 131.

[0075] It should be noted that the output circuit 140 may further include an output resistor. One end of the output resistor is connected to the output end of the first switch module 141, and the other end is grounded. When the first switch module 141 is turned on, the output circuit 140 forms a loop, and the electrical signal at the output end of the first switch module 141 is the voltage value shared by the output resistor in this loop. Therefore, the voltage signal at the output end of the first switch module 141 is the collision verification signal. When the first switch module 141 is turned off, the output circuit 140 is an open circuit, and there is no electrical signal at the output end of the first switch module 141. Correspondingly, the first switch module 141 does not output the collision verification signal at its output end.

[0076] In addition, a protection resistor may be provided between the output end of the first switch module 141 and the output resistor to prevent a short circuit from occurring between the output end of the first switch module 141 and the control end of the second detection circuit 200 and burning out the circuit when the first switch module 141 is connected to the control end of the second detection circuit 200 and controls the second detection circuit to conduct. This can protect the collision signal detection circuit, improve the practicability of the collision signal detection circuit, and extend the service life of the collision signal detection circuit.

[0077] In this embodiment, the judgment circuit 130 is used to judge whether the collision signal received by the collision signal input end 300 meets the first preset condition. When the collision signal meets the first preset condition, it controls the first switch module 141 of the output circuit 140 to conduct, so that the output end of the first switch module 141 outputs the collision verification signal. The output circuit 140 is used to output the collision verification signal, so that the control end 210 of the second detection circuit 200 controls the second detection circuit 200 to conduct based on the collision verification signal, and further enables the microcontroller 400 to detect the validity of the collision signal. The setting of the judgment circuit 130 realizes the detection of the collision signal through hardware setting, which is beneficial to improving the reliability of the collision signal detection circuit.

[0078] The above embodiment clarifies the specific structure of the first detection circuit 100. The following embodiment further specifically describes the judgment circuit 130 in the first detection circuit 100.

[0079] In some embodiments, as Figure 5 shown, the judgment circuit 130 further includes an anti-reverse module 132. One end of the anti-reverse module 132 is connected to the collision signal input end 300, and the other end is connected to the voltage division module 131.

[0080] Specifically, when the collision signal received by the anti-reverse module 132 at the collision signal input terminal 300 is greater than the power signal of the first power supply 150, the anti-reverse module 132 can prevent a current flowing backward to the first power supply 150 from being formed on the judgment circuit 130, thereby avoiding damage to the first power supply 150 and enhancing the practicality of the collision signal detection circuit.

[0081] Exemplarily, the anti-reverse module 132 is a diode. The anode of the diode is connected to the voltage division module 131, and the cathode of the diode is connected to the collision signal input terminal 300. When the collision signal received by the collision signal input terminal 300 is greater than the power signal of the first power supply 150, the signal at the cathode of the diode is greater than the signal at the anode of the diode, and the diode is turned off, so that a current flowing from the collision signal input terminal 300 to the first power supply 150 cannot be formed on the judgment circuit 130.

[0082] In some embodiments, as Figure 6 shown, the first detection circuit 100 further includes a conversion circuit 160. The conversion circuit 160 includes a second power supply 161, a first resistor 162, and a second switch module 163 connected in series. The output terminal of the second switch module 163 is grounded, the control terminal of the second switch module 163 is connected to the output terminal of the output circuit 140, an output node 164 is provided between the first resistor 162 and the second switch module 163, and the output node 164 is connected to the output terminal 120 of the first detection circuit 100;

[0083] When the output circuit 140 outputs the collision verification signal to the control terminal of the second switch module 163, the second switch module 163 is turned on, and the output node 164 outputs a conduction signal to the control terminal 210 of the second detection circuit 200.

[0084] Specifically, the conversion circuit 160 is used to convert and output the collision verification signal output by the output circuit 140. That is, when the output circuit 140 outputs the collision verification signal to the control end of the second switch module 163, the control end of the second switch module 163 controls the second switch module 163 to conduct. The second power supply 161, the first resistor 162, and the second switch module 163 are conducted. The output node 164 is located between the first resistor 162 and the second switch module 163. Then, the electrical signal of the output node 164 is a low-level signal, that is, the conduction signal, and the second detection circuit 200 is conducted. When the output circuit 140 does not output the collision verification signal to the control end of the second switch module 163, the control end of the second switch module 163 controls the second switch module 163 to turn off. The second power supply 161, the first resistor 162, and the second switch module 163 are turned off. The output node 164 is located between the first resistor 162 and the second switch module 163. Then, the electrical signal of the output node 164 is the power supply signal of the second power supply 161. The power supply signal of the second power supply 161 is a high-level signal. This high-level signal is regarded as sending a turn-off signal to the second detection circuit 200, and the second detection circuit 200 is turned off.

[0085] The setting of the conversion circuit 160 makes the signal output from the output end 120 of the first detection circuit 100 correspond to the high or low level of the collision signal received by the collision signal input end 300. That is, when the voltage difference between the collision signal and the first power supply 150 is greater than the first preset value, the collision signal is a low-level signal relative to the first power supply 150. The conversion circuit 160 is conducted and outputs a low-level signal corresponding to the collision signal. When the voltage difference between the first power supply 150 and the collision signal is not greater than the first preset value, that is, the collision signal is greater than the electrical signal of the first power supply 150, or the first power supply 150 is greater than the electrical signal of the collision signal but does not exceed the first preset value. At this time, the first switch module 141 in the output circuit 140 is not conducted. The collision signal is a high-level signal relative to the first power supply 150. The conversion circuit 160 is turned off and outputs a high-level signal corresponding to the collision signal.

[0086] When the first detection circuit 100 and the second detection circuit 200 are connected through the microcontroller 400, the signal output from the output end 120 of the first detection circuit 100 corresponds to the collision signal, which can facilitate the microcontroller 400 to directly confirm whether the collision signal is at the peak (i.e., high level) or the trough (i.e., low level), avoiding the microcontroller 400 from converting the received signal for confirmation, which is beneficial to improving the processing efficiency of the microcontroller 400.

[0087] It should be noted that when the first detection circuit 100 includes the conversion circuit 160, the conduction signal output by the output node 164 of the conversion circuit 160 to the microcontroller 400 can be regarded as the collision verification signal for the microcontroller 400.

[0088] In this embodiment, the output terminal 120 of the first detection circuit 100 is connected to the microcontroller 400 through the output node 164 of the conversion circuit 160, enabling the microcontroller 400 to confirm the real-time state (high level or low level) of the collision signal through the first detection circuit 100. Furthermore, it is beneficial for the microcontroller 400 to identify the duration of the collision signal state. Also, by connecting the microcontroller 400 to the second detection circuit 200, it can avoid the situation where the direct connection between the first detection circuit 100 and the second detection circuit 200 increases the power consumption of the collision signal detection circuit, which is beneficial for reducing power consumption.

[0089] The above embodiment describes the structural composition of the first detection circuit 100. The following will describe the specific structure of the second detection circuit 200 in detail.

[0090] In some embodiments, as Figure 7 shown, the second detection circuit 200 includes a third switch module 220. The control end of the third switch module 220 is connected to the control end 210 of the second detection circuit 200. The input end of the third switch module 220 is connected to the input end of the second detection circuit 200. The output end of the third switch module 220 is connected to the output end of the second detection circuit 200.

[0091] Specifically, when the first detection circuit 100 outputs the collision verification signal, the control end 210 of the second detection circuit 200 controls the second detection circuit 200 to conduct, that is, the control end of the third switch module 220 controls the third switch module 220 to conduct. The second detection circuit 200 transmits the collision signal received by the collision signal input terminal 300 connected to its input end to the microcontroller 400 connected to the output end of the second detection circuit 200, so that the microcontroller 400 can judge the validity of the collision signal received by the collision signal input terminal 300.

[0092] Specifically, as Figure 8As shown, the third switch module 220 may be a transistor of model S-LMUN5335DW1T1G. When the control terminal of this transistor receives a high-level signal, it can control the transistor to conduct. When it does not receive a signal or receives a low-level signal, it can control the transistor to turn off. Therefore, the control terminal of the third switch module 220 can be directly connected to the output terminal of the first switch module 141 of the first detection circuit 100. When the first switch module 141 conducts, the output terminal of the first switch module 141 outputs a high-level signal. When the first switch module 141 turns off, the output terminal of the first switch module 141 does not output a signal, which matches the on-off logic of the third switch module 220.

[0093] In addition, the control terminal of the third switch module 220 can also be connected to the first detection circuit 100 through the microcontroller 400. The microcontroller 400 can send a high-level signal to the control terminal of the third switch module 220 when receiving the collision verification signal, so as to control the third switch module 220 to conduct, and further control the second detection circuit 200 to conduct.

[0094] Furthermore, the control terminal of the third switch module 220 can also be connected to the first detection circuit 100 through the microcontroller 400. The microcontroller 400 can send a high-level signal to the control terminal of the third switch module 220 when receiving a low-level signal sent by the output node 164 of the conversion circuit 160 of the first detection circuit 100, so as to control the third switch module 220 to conduct, and further control the second detection circuit 200 to conduct.

[0095] In this embodiment, the second detection circuit 200 realizes on-off through the third switch module 220, with a simple structure and low cost. By its on-off, the microcontroller 400 can detect the validity of the collision signal, which is beneficial to improving the practicability of the collision signal detection circuit.

[0096] The above embodiments specifically illustrate the structure of the detection circuit. The following further specifically illustrates the detection method based on the detection circuit.

[0097] Based on the same inventive concept, the present application also provides a collision signal detection method, which is applied to the microcontroller 400 as described above, as Figure 9 shown, the method includes:

[0098] Step S100, determining whether the collision signal meets a first preset condition through the first detection circuit 100;

[0099] Specifically, when the microcontroller 400 is connected to the output terminal 120 of the first detection circuit 100 and the control terminal 210 of the second detection circuit 200, when the microcontroller 400 receives the collision verification signal sent by the first detection circuit 100, it determines that the collision signal meets the first preset condition.

[0100] When the output terminal 120 of the first detection circuit 100 is connected to the control terminal 210 of the second detection circuit 200, when the microcontroller 400 receives the collision signal through the second detection circuit 200, it determines that the collision signal meets the first preset condition.

[0101] Step S200, in response to determining that the collision signal meets the first preset condition, receive the collision through the second detection circuit 200 to determine whether the collision is valid;

[0102] Specifically, after the microcontroller 400 determines that the collision signal meets the first preset condition, it detects the collision signal transmitted through the second detection circuit 200 to determine whether the collision signal is valid.

[0103] Exemplarily, a confirmation valid range is pre-stored in the microcontroller 400 for the microcontroller 400 to determine the validity of the collision signal. When the microcontroller 400 receives the collision signal, it confirms the value of the collision signal. If the value of the collision signal is within the confirmation valid range, the microcontroller 400 determines that the collision signal is valid. If the value of the collision signal is not within the confirmation valid range, the microcontroller 400 determines that the collision signal is invalid.

[0104] In this embodiment, the microcontroller 400 determines whether the collision signal meets the first preset condition through the first detection circuit 100, receives the collision signal through the second detection circuit 200 to determine whether the collision signal meets the second preset condition. The judgment result of the first detection circuit 100 controls the on / off of the second detection circuit 200, thereby realizing the step-by-step confirmation of the collision signal, enabling the microcontroller 400 to perform multi-level judgment on the collision signal, which is beneficial to improving the judgment accuracy and at the same time beneficial to improving the judgment efficiency.

[0105] It should be further noted that during the vehicle power-on process, due to the different power-on timings of various components, the level of the collision signal rises from a low level to a high level signal. During this process, continuous low-level signals, rising edge signals, and high-level signals appear. The normal collision signal is a PWM signal, which has continuous low-level signals, rising edge signals, high-level signals, and falling edge signals. In the existing collision signal detection scheme, after detecting continuous low-level signals, rising edge signals, and high-level signals, it is determined that the signal is a collision signal, which is likely to lead to misidentification of the collision signal. Therefore, on this basis, the collision signal is further confirmed, that is, after detecting continuous low-level signals, rising edge signals, high-level signals, and falling edge signals, it is determined that the signal is a collision signal. The above embodiment clarifies the confirmation process of the low-level signal of the collision signal by the detection circuit. The following embodiments will elaborate in detail on the further confirmation of the collision signal based on the detection circuit.

[0106] In some embodiments, the collision signal includes at least one continuous low-level signal, rising edge signal, high-level signal, and falling edge signal;

[0107] Determining whether the collision signal is valid includes: determining whether the low-level signal of the collision signal is valid;

[0108] After determining whether the collision signal is valid, it further includes:

[0109] Step S300, in response to determining that the low-level signal is valid, and the duration is greater than a preset duration, and there are a rising edge signal, a high-level signal, and a falling edge signal after the low-level signal, an emergency call is triggered.

[0110] Specifically, the microcontroller 400 determines the validity of the collision signal by determining the validity of the low-level signal of the collision signal. After the microcontroller 400 confirms that the low-level signal of the collision signal is valid, it further confirms other signals included in the collision signal to further confirm the validity of the collision signal, which is beneficial to improving the accuracy of determining the collision signal. After the microcontroller 400 determines that the low-level signal in the collision signal is valid, it determines the duration of the low-level signal. The preset duration is pre-stored in the microcontroller 400, and the preset duration is the duration of the low-level signal in the normal collision signal. If the duration of the low-level signal confirmed by the microcontroller 400 is greater than the preset duration, it is determined that the collision signal is abnormal. However, at this time, the microcontroller 400 does not trigger an emergency call and needs to further confirm the collision signal to avoid mis-triggering the emergency call.

[0111] After the microcontroller 400 determines that the duration of the valid low-level signal is greater than the preset duration, it continuously detects the collision signal. If the rising-edge signal, high-level signal, and falling-edge signal appear after the detection of the low-level signal, it is determined that the collision signal is a correct collision signal. Since the duration of the low-level signal in this normal collision signal is greater than the preset duration, it is determined that the component connected to the collision signal input terminal 300 has collided. The microcontroller 400 then controls the communication module connected to it to call the emergency call number, that is, trigger an emergency call, so that the outside can rescue the vehicle where the microcontroller 400 is located.

[0112] In this embodiment, on the premise that the microcontroller 400 confirms that the low-level signal of the collision signal meets the first preset condition and is valid, it monitors the duration of the low-level signal to confirm whether this valid low-level signal belongs to the situation where an emergency call needs to be made. When it is confirmed that this valid low-level signal belongs to the situation where an emergency call needs to be made, it further monitors the signal situation after this low-level signal to confirm whether this low-level signal belongs to a normal collision signal. After the microcontroller 400 confirms the rising-edge signal, high-level signal, and falling-edge signal that a normal collision signal should have after the low-level signal, it then triggers an emergency call, adding the confirmation of the falling-edge signal. On the basis of double confirmation of the low-level signal, multiple confirmations of this collision signal are realized, effectively avoiding misidentification of the collision signal, improving the accuracy of triggering an emergency call, effectively avoiding the situation of mis-triggering of the emergency call, and being beneficial to improving the practicability of the collision signal detection circuit.

[0113] The above embodiment clarifies that the process of determining the validity of the collision signal includes judging that the low-level signal is valid. The following elaborates on the specific situation of judging the validity of the low-level signal.

[0114] In some embodiments, in step S200: the judgment of whether the low-level signal is valid includes:

[0115] Step S201: In response to determining that the low-level signal is less than or equal to the second preset value, it is determined that the low-level is valid.

[0116] Specifically, when the microcontroller 400 receives the low-level signal of the collision signal through the second detection circuit 200, it immediately determines the value of the low-level signal. The microcontroller 400 compares the value of the low-level signal with the pre-stored second preset value. If the low-level signal is less than or equal to the second preset value, it is determined that the low-level signal is valid. If the low-level signal is greater than the second preset value, it is determined that the low-level signal is invalid.

[0117] Exemplarily, the second preset value is 3 volts, and the low-level signal of the collision signal is generally 0-2 volts. Therefore, the microcontroller 400 compares the low-level signal of the collision signal received through the second detection circuit 200 with the second preset value, which can further avoid misidentifying the received low-level signal as the collision signal, and effectively confirm the low-level signal of the collision signal.

[0118] In this embodiment, the microcontroller 400 confirms whether the low-level signal is valid by comparing the low-level signal with the second preset value. The second preset value is determined based on the value of the low-level signal in the valid collision signal, which can further confirm the validity of the low-level signal of the collision signal and improve the practicality of the collision signal detection method.

[0119] The process of the first detection circuit 100 for judging the low-level signal is described in detail below.

[0120] In some embodiments, in step S100: judging whether the low-level signal meets the first preset condition through the first detection circuit 100 includes:

[0121] Step S101, in response to the vehicle being powered on, after a preset duration, judge whether the low-level signal meets the first preset condition through the first detection circuit 100.

[0122] Specifically, the microcontroller 400 does not judge whether the low-level signal of the collision signal meets the first preset condition through the first detection circuit 100 during both the sleep and power-on processes of the vehicle. Instead, after the vehicle is powered on for a period of time, the first detection circuit 100 judges whether the low-level signal meets the first preset condition. The period of time is the preset duration.

[0123] Exemplarily, the preset duration is 3 seconds. When the microcontroller 400 confirms that it receives the vehicle power-on signal, it judges whether the low-level signal meets the first preset condition through the first detection circuit 100 after 3 seconds.

[0124] In this embodiment, setting the microcontroller 400 to judge the first preset condition for the low-level signal of the collision signal after the vehicle is powered on for the preset duration can fundamentally avoid the situation that the first detection circuit 100 receives a level signal with a rising edge or a falling edge due to the power-on timing problem of each component of the vehicle and misidentifies the level signal as the collision signal, which may easily cause the microcontroller 400 to mis-trigger an emergency call or other safety measures, and effectively improve the practicality of the collision signal detection method.

[0125] It should be noted that some embodiments of the present application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the above embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0126] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application further provides a collision signal detection device, as Figure 10 shown, including:

[0127] A first judgment module 100, configured to judge whether the low-level signal meets a first preset condition through the first detection circuit 100;

[0128] A second judgment module 200, configured to, in response to determining that the low-level signal meets the first preset condition, receive the low-level signal through the second detection circuit 200 to judge whether the low-level signal is valid;

[0129] A third judgment module 300, configured to, in response to determining that the low-level signal is valid, and the duration is greater than a preset duration, and there is a rising edge signal, a high-level signal, and a falling edge signal after the low-level signal, trigger an emergency call.

[0130] In some embodiments, the second judgment module 200 is further configured to, in response to determining that the low-level signal is less than or equal to a second preset value, determine that the low level is valid.

[0131] In some embodiments, the first judgment module 100 is further configured to, in response to the vehicle being powered on, after a preset duration, judge whether the low-level signal meets the first preset condition through the first detection circuit 100.

[0132] The device of the above embodiment is used to implement the corresponding collision signal detection method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated herein.

[0133] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, it implements the collision signal detection method described in any of the above embodiments.

[0134] Figure 11Fig. 0 shows a more specific schematic diagram of the hardware structure of the 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. Among them, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other inside the device through the bus 1050.

[0135] The processor 1010 may be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0136] The memory 1020 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0137] The input / output interface 1030 is used to connect to an input / output module to implement information input and output. The input / output module may be configured as a component in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Among them, the input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0138] The communication interface 1040 is used to connect to a communication module (not shown in the figure) to implement communication interaction between this device and other devices. Among them, the communication module may implement communication through a wired method (such as USB, network cable, etc.) or through a wireless method (such as a mobile network, WIFI, Bluetooth, etc.).

[0139] The bus 1050 includes a path for transmitting information between various components of the device (such as the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0140] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in the specific implementation process, the device may further include other components necessary for normal operation. In addition, those skilled in the art can understand that the above device may also only include the components necessary to implement the solution of the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0141] The electronic device in the above embodiment is used to implement the corresponding collision signal detection method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0142] Based on the same inventive concept, corresponding to the method in any of the above embodiments, the present application also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the collision signal detection method as described in any of the foregoing embodiments.

[0143] 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. The 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, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassette tapes, magnetic disk storage, or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0144] The computer instructions stored in the storage medium of the above embodiment are used to cause the computer to execute the collision signal detection method as described in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0145] Based on the same concept, corresponding to the method in any of the above embodiments, the present application also provides a computer program product including computer program instructions, which when running on a computer, cause the computer to execute the method as described in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0146] Based on the same concept, corresponding to any of the above-described method embodiments, the present application further provides a vehicle, including the electronic device described above, or the collision signal detection circuit described above, having the beneficial effects of the corresponding method embodiments and circuit embodiments, which will not be elaborated herein.

[0147] It can be understood that before using the technical solutions of the various embodiments in the present disclosure, the types, usage scopes, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0148] For example, when responding to a user's active request, a prompt message is sent to the user to clearly prompt the user that the operation requested by the user will require obtaining and using the user's personal information. Thus, the user can autonomously choose whether to provide personal information to the electronic device, application program, server, storage medium, or other software or hardware that performs the operations of the technical solutions of the present disclosure according to the prompt message.

[0149] As an optional but non-limiting implementation manner, the manner of sending a prompt message to the user in response to receiving the user's active request may be, for example, in the form of a pop-up window, and the prompt message may be presented in text in the pop-up window. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0150] It can be understood that the above process of notifying and obtaining the user's authorization is only illustrative and does not limit the implementation manner of the present disclosure. Other ways that meet the relevant laws and regulations can also be applied to the implementation manner of the present disclosure.

[0151] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.

[0152] In addition, for simplicity of explanation and discussion, and so as not to make the embodiments of the present application difficult to understand, known power / ground connections of integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Further, the devices may be shown in block diagram form so as not to make the embodiments of the present application difficult to understand, and this also takes into account the fact that details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In cases where specific details (such as circuits) are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application may be implemented without these specific details or with variations of these specific details. Accordingly, these descriptions should be regarded as illustrative rather than restrictive.

[0153] Although the present application has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (such as dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0154] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is exemplary only and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the concept of the present invention, the technical features between the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0155] The embodiments of the present application are intended to cover all such alternatives, 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 the present application shall be included within the protection scope of the present application.

Claims

1. A collision signal detection circuit, characterized in that Including: A first detection circuit, whose control end is used to connect to a collision signal input end, and the collision signal input end is used to receive a collision signal; A second detection circuit, whose control end is connected to the output end of the first detection circuit, whose input end is used to connect to the collision signal input end, and whose output end is used to connect to a microcontroller; Wherein, the first detection circuit is used to send a collision verification signal to the control end of the second detection circuit when the collision signal received by the collision signal input end meets a first preset condition; The control end of the second detection circuit is used to control the second detection circuit to conduct when receiving the collision verification signal, so that the collision signal received by the collision signal input end is transmitted to the microcontroller, and the microcontroller judges the validity of the collision signal.

2. The collision signal detection circuit according to claim 1, characterized in that The control end of the second detection circuit and the output end of the first detection circuit are both connected to the microcontroller, and the output end of the first detection circuit sends the collision verification signal to the control end of the second detection circuit through the microcontroller.

3. The collision signal detection circuit according to claim 1, wherein The first detection circuit includes a judgment circuit and an output circuit, the judgment circuit includes a voltage division module, the output circuit includes a first switch module, both the judgment circuit and the output circuit are connected to a first power supply, one end of the voltage division module is connected to the input end of the first switch module, and the other end is respectively connected to the control end of the first switch module and the collision signal input end, and the output end of the first switch module is connected to the output end of the first detection circuit; When the pressure difference between the power signal of the first power supply and the collision signal of the collision signal input end is greater than a first preset value, the collision signal meets the first preset condition, the pressure difference across the voltage division module causes the first switch module to conduct, and the output end of the first detection circuit outputs the collision verification signal.

4. The collision signal detection circuit according to claim 3, wherein The judgment circuit further includes an anti-reverse module, one end of the anti-reverse module is connected to the collision signal input end, and the other end is connected to the voltage division module.

5. The collision signal detection circuit according to claim 3, wherein The first detection circuit further includes a conversion circuit, the conversion circuit includes a second power supply, a first resistor and a second switch module connected in series, the output end of the second switch module is grounded, the control end of the second switch module is connected to the output end of the output circuit, and an output node is provided between the first resistor and the second switch module, and the output node is connected to the output end of the first detection circuit; When the output circuit outputs the collision verification signal to the control end of the second switch module, the second switch module conducts, and the output node outputs a conduction signal to the control end of the second detection circuit.

6. The collision detection signal according to claim 1, wherein The second detection circuit includes a third switch module, the control end of the third switch module is connected to the control end of the second detection circuit, the input end of the third switch module is connected to the input end of the second detection circuit, and the output end of the third switch module is connected to the output end of the second detection circuit.

7. A method for detecting a collision signal, characterized in that, Applied to the microcontroller according to any one of claims 1 to 6, the method includes: Judge whether the collision signal meets the first preset condition through the first detection circuit; In response to determining that the collision signal meets the first preset condition, receive the collision signal through the second detection circuit to judge whether the collision signal is valid.

8. The method according to claim 7, wherein The collision signal includes at least one continuous low-level signal, rising edge signal, high-level signal and falling edge signal; Judging whether the collision signal is valid includes: judging whether the low-level signal of the collision signal is valid; After judging whether the collision signal is valid, it further includes: In response to determining that the low-level signal is valid, the duration is greater than the preset duration, and there are a rising edge signal, a high-level signal and a falling edge signal after the low-level signal, an emergency call is triggered.

9. The method according to claim 7, wherein Judging whether the low-level signal meets the first preset condition through the first detection circuit includes: In response to the vehicle being powered on, after a preset duration, judge whether the low-level signal meets the first preset condition through the first detection circuit.

10. A vehicle, characterized in that, It includes the collision signal detection circuit and the microcontroller according to any one of claims 1 to 6. The microcontroller includes a memory, a processor, and a computer program stored on the memory and running on the processor. When the processor executes the program, the method according to any one of claims 7 to 9 is implemented.

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