Impact detection circuit and protection plate

Abstract

The utility model is suitable for the technical field of protection plates, and provides an impact detection circuit and a protection plate. The impact detection circuit comprises an impact detection module and a logic control module, and the impact detection module is electrically connected with the logic control module. The impact detection module is used for outputting real-time voltage according to impact energy borne by the protection plate, and the logic control module is used for outputting a logic alarm signal according to the real-time voltage to warn a system monitoring center so as to timely process the protection plate. According to the impact detection circuit provided by the embodiment of the invention, the impact damage degree of the protection plate can be monitored in real time only by using a simple circuit, and graded alarm for different damage degrees is realized. According to the design, the use of a detection element or a sensor with relatively high cost is avoided, so that the detection cost of the impact detection circuit for detecting the damage degree of the protection plate is remarkably reduced.

Description

Technical Field

[0001] This application belongs to the technical field of protection plates, and particularly relates to an impact detection circuit and a protection plate. Background Art

[0002] The battery pack of a new energy vehicle, as a core power component, has the risk of catching fire or exploding due to potential hazards such as extrusion, collision, and puncture. The protection plate of the battery pack is designed to provide effective protection. However, after being subjected to a high-energy impact from a foreign object, the protection plate is prone to dent and deformation. Since the battery pack protection plate is usually located on the vehicle chassis, it is difficult for the vehicle owner to visually inspect its condition. This results in the "injured" protection plate not only having a greatly reduced protection effect but also potentially bringing the risk of uneliminated battery failure. However, the existing impact detection circuits for protection plates usually use expensive detection components and sensors to detect the degree of damage to the protection plate, and the price of some precision components may even exceed the overall cost of a low-cost protection plate, thus resulting in a relatively high detection cost for protection plates with impact damage detection functions. Utility Model Content

[0003] The embodiments of this application provide an impact detection circuit and a protection plate, which can solve the problem of relatively high detection cost of existing impact detection protection plates, and can further detect the severity of damage to the protection plate.

[0004] In a first aspect, the embodiments of this application provide an impact detection circuit, which is applied to a protection plate and includes an impact detection module and a logic control module. The impact detection module is electrically connected to the logic control module;

[0005] The impact detection module is used to output a real-time voltage according to the impact energy received by the protection plate, and the logic control module is used to output a logic alarm signal according to the real-time voltage.

[0006] In a possible implementation manner of the first aspect, the real-time voltage includes a first voltage and a second voltage, and the logic alarm signal includes a first logic alarm signal and a second logic alarm signal;

[0007] When the impact energy received by the protection plate is greater than or equal to the first preset energy and the impact energy received by the protection plate is less than the second preset energy, the impact detection module is in a first state and outputs the first voltage, and the logic control module is used to output the first logic alarm signal according to the first voltage;

[0008] When the impact energy received by the protection plate is greater than or equal to the second preset energy, the impact detection module is in a second state and outputs the second voltage, and the logic control module is used to output the second logic alarm signal according to the second voltage.

[0009] In a possible implementation of the first aspect, the impact detection module includes a plurality of parallel wire groups. The first ends of all the parallel wire groups are grounded, the second ends of all the parallel wire groups are electrically connected to a first power supply, and the output ends of all the parallel wire groups are electrically connected to the logic control module.

[0010] In a possible implementation of the first aspect, the parallel wire group includes at least two first wires. The first ends of all the first wires are respectively electrically connected to the first power supply and the logic control module, and the second ends of all the first wires are grounded.

[0011] In a possible implementation of the first aspect, the parallel wire group further includes a first resistor and a plurality of second resistors. The first end of the first resistor is used to be electrically connected to the first power supply. The second end of the first resistor is respectively electrically connected to the logic control module and the first ends of all the second resistors. The second ends of the plurality of second resistors are correspondingly electrically connected to the first ends of the plurality of first wires; or, the second end of the first resistor is respectively electrically connected to the logic control module and the first ends of all the first wires, the first ends of the plurality of second resistors are correspondingly electrically connected to the second ends of the plurality of first wires, and the second ends of all the second resistors are grounded.

[0012] In a possible implementation of the first aspect, the logic control module includes a comparison unit and a signal output unit. The comparison unit is respectively electrically connected to the signal output unit and the impact detection module;

[0013] The comparison unit is used to output a level signal according to the real-time voltage, a first preset value, and a second preset value, and the signal output unit outputs the logic alarm signal according to the level signal.

[0014] In a possible implementation of the first aspect, the comparison unit includes a voltage comparison chip. The first input end and the second input end of the voltage comparison chip are both electrically connected to the impact detection module. The third input end of the voltage comparison chip is used to receive the first preset value, the fourth input end of the voltage comparison chip is used to receive the second preset value, and the first output end and the second output end of the voltage comparison chip are both electrically connected to the signal output unit.

[0015] In a possible implementation manner of the first aspect, the level signal includes a first level signal, a second level signal, and a third level signal. The signal output unit includes a first signal output sub-unit, a second signal output sub-unit, and a third signal output sub-unit. The first signal output sub-unit, the second signal output sub-unit, and the third signal output sub-unit are all electrically connected to the comparison unit. The first signal output sub-unit is configured to output a standard signal according to the first level signal. The second signal output sub-unit is configured to output a first logic alarm signal according to the second level signal. The third signal output sub-unit is configured to output a second logic alarm signal according to the third level signal.

[0016] In a possible implementation manner of the first aspect, the first signal output sub-unit includes a third resistor and a first triode. The first end of the third resistor is electrically connected to the comparison unit. The second end of the third resistor is electrically connected to the base of the first triode. The collector of the first triode is configured to be electrically connected to a second power supply. The emitter of the first triode is grounded.

[0017] The second signal output sub-unit includes a fourth resistor, a fifth resistor, a sixth resistor, a second triode, a third triode, and a first switching tube. The first end of the fourth resistor is electrically connected to the comparison unit. The second end of the fourth resistor is electrically connected to the base of the second triode. The collector of the second triode is electrically connected to the second power supply and the first end of the fifth resistor respectively. The base of the third triode is electrically connected to the second end of the fifth resistor. The emitters of the third triode and the second triode are both grounded. The collector of the third triode is electrically connected to the first end of the sixth resistor. The gate of the first switching tube is electrically connected to the second end of the sixth resistor. The source of the first switching tube is electrically connected to the second power supply. The drain of the first switching tube is grounded.

[0018] The third signal output sub-unit includes a seventh resistor and a fourth triode. The first end of the seventh resistor is electrically connected to the comparison unit. The second end of the seventh resistor is electrically connected to the base of the fourth triode. The collector of the fourth triode is configured to be electrically connected to the second power supply. The emitter of the fourth triode is grounded.

[0019] In a second aspect, an embodiment of the present application provides a protection plate, which includes a protection plate body and at least one impact detection circuit described in any one of the first aspects. The protection plate body includes a first protection layer, an impact resistance layer, a buffer layer, and a second protection layer. The buffer layer is disposed on the second protection layer, the impact resistance layer is disposed on the buffer layer, the first protection layer is disposed on the impact resistance layer, and the impact detection circuit is disposed between the first protection layer and the impact resistance layer, or the impact detection circuit is disposed between the impact resistance layer and the buffer layer, or the impact detection circuit is disposed between the buffer layer and the second protection layer.

[0020] The beneficial effects of the embodiments of the present application compared with the prior art are as follows:

[0021] The impact detection circuit provided by the embodiment of the present application includes an impact detection module and a logic control module, and the impact detection module is electrically connected to the logic control module. When the protection plate is impacted by different impact energies, corresponding deformations will occur in the locally impacted area of the protection plate, thereby generating corresponding deformation amounts, and the impact detection module will output corresponding real-time voltages. The logic control module outputs corresponding logic alarm signals according to the real-time voltages to alert the system monitoring center so as to process the protection plate in a timely manner. It can be seen from this that the impact detection circuit provided by the embodiment of the present application can only use a simple circuit to monitor the impact damage degree of the protection plate in real time and realize hierarchical alarms for different damage degrees. This design avoids the use of relatively expensive detection components or sensors, thereby significantly reducing the detection cost of the impact detection circuit for detecting the damage degree of the protection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is a principle block diagram of an impact detection circuit provided by an embodiment of the present application;

[0024] Figure 2 is a circuit connection schematic diagram of an impact detection circuit provided by an embodiment of the present application;

[0025] Figure 3 is a circuit connection schematic diagram of a parallel wire group provided by an embodiment of the present application;

[0026] Figure 4 is a principle block diagram of an impact detection circuit provided by another embodiment of the present application;

[0027] Figure 5 It is a schematic circuit connection diagram of a comparison unit provided by an embodiment of the present application;

[0028] Figure 6 It is a schematic circuit connection diagram of a preset voltage module provided by an embodiment of the present application;

[0029] Figure 7 It is a schematic circuit connection diagram of a first signal output subunit provided by an embodiment of the present application;

[0030] Figure 8 It is a schematic circuit connection diagram of a second signal output subunit provided by an embodiment of the present application;

[0031] Figure 9 It is a schematic circuit connection diagram of a third signal output subunit provided by an embodiment of the present application;

[0032] Figure 10 It is a schematic diagram of a specific implementation circuit of impact detection provided by an embodiment of the present application;

[0033] Figure 11 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0034] Figure 12 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0035] Figure 13 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0036] Figure 14 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0037] Figure 15 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0038] Figure 16 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0039] Figure 17 It is a schematic diagram of a specific implementation circuit of impact detection provided by another embodiment of the present application;

[0040] Figure 18 It is a schematic diagram of the structure of a protective plate provided by an embodiment of the present application.

[0041] In the figure, 10 is the impact detection circuit; 101 is the impact detection module; 1011 is the first wire; 102 is the logic control module; 1021 is the comparison unit; 1022 is the signal output unit; 20 is the protective plate; 201 is the first protective layer; 202 is the impact-resistant layer; 203 is the buffer layer; 204 is the second protective layer. Detailed implementation manners

[0042] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0043] It should be understood that when used in the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0044] It should also be understood that the term "and / or" as used in the specification and the appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0045] As used in the specification and the appended claims of the present application, the term "if" can be interpreted as "when", "once", "in response to a determination", or "in response to a detection" according to the context. Similarly, the phrase "if a determination is made" or "if [the described condition or event] is detected" can be interpreted as meaning "once a determination is made", "in response to a determination", "once [the described condition or event] is detected", or "in response to a detection of [the described condition or event]" according to the context.

[0046] In addition, in the description of the specification and the appended claims of the present application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0047] References to "one embodiment" or "some embodiments" or the like described in the specification of this application mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc., which appear in different places in this specification, do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0048] As a core power component, the battery pack of a new energy vehicle has the risk of catching fire or exploding due to potential hazards such as extrusion, collision, and puncture. The protective plate of the battery pack is designed to provide effective protection, but it is prone to dent and deform after being impacted by a high-energy foreign object. Since the battery pack protective plate is usually located on the vehicle chassis, it is difficult for the vehicle owner to visually inspect its condition. This results in the "injured" protective plate not only having a greatly reduced protection effect but also possibly bringing an uneliminated risk of battery failure. However, existing impact detection circuits for protective plates usually use expensive detection components and sensors to detect the degree of damage to the protective plate, and the prices of some precision components may even exceed the overall cost of a low-cost protective plate, thus resulting in a relatively high detection cost for the protective plate with an impact damage detection function.

[0049] Based on the above problems, the impact detection circuit provided in the embodiments of this application includes an impact detection module and a logic control module, and the impact detection module is electrically connected to the logic control module. When the protective plate is impacted by different impact energies, corresponding deformations will occur in the locally impacted area of the protective plate, thereby generating corresponding deformation amounts, and the impact detection module will output a corresponding real-time voltage. The logic control module outputs a corresponding logic alarm signal according to the real-time voltage to alert the system monitoring center for timely processing of the protective plate. It can be seen that the impact detection circuit provided in the embodiments of this application can use only a simple circuit to monitor in real time the degree of impact damage to the protective plate and achieve hierarchical alarms for different degrees of damage. This design avoids the use of relatively expensive detection components or sensors, thus significantly reducing the detection cost of the impact detection circuit for detecting the degree of damage to the protective plate.

[0050] In order to illustrate the technical solutions described in this application, the following will be described through specific embodiments.

[0051] Figure 1 The principle block diagram of an impact detection circuit 10 provided in an embodiment of this application is shown. Refer to Figure 1As shown, the impact detection circuit 10 includes an impact detection module 101 and a logic control module 102, and the impact detection module 101 is electrically connected to the logic control module 102.

[0052] Specifically, when the protection plate 20 is impacted by different impact energies, corresponding deformations will occur in the locally impacted area of the protection plate 20, thereby generating corresponding deformation amounts, and the impact detection module 101 will output corresponding real-time voltages. The logic control module 102 outputs corresponding logic alarm signals according to the real-time voltages to alert the system monitoring center for timely processing of the protection plate 20. It can be seen that the impact detection circuit 10 provided in the embodiment of the present application can monitor the impact damage degree of the protection plate 20 in real time with only a simple circuit and implement hierarchical alarms for different damage degrees. This design avoids the use of relatively expensive detection components or sensors, thereby significantly reducing the detection cost of the impact detection circuit 10 for detecting the damage degree of the protection plate 20.

[0053] Specifically, the real-time voltage includes a first voltage and a second voltage, and the logic alarm signal includes a first logic alarm signal and a second logic alarm signal.

[0054] When the impact energy received by the protection plate 20 is greater than or equal to the first preset energy and the impact energy received by the protection plate 20 is less than the second preset energy, it indicates that the impact force received by the protection plate 20 is relatively large. At this time, relatively large deformations will occur in the locally impacted area of the protection plate 20, and the deformation amount is greater than the first preset deformation amount and less than the second preset deformation amount. At this time, the impact detection module 101 is in the first state and outputs the first voltage. Among them, the first state can be the state of the impact detection module 101 when the protection plate 20 receives a relatively large impact force. The logic control module 102 outputs a first logic alarm signal according to the first voltage to alert the system monitoring center for timely processing of the protection plate 20.

[0055] When the impact energy received by the protection plate 20 is greater than or equal to the second preset energy, it indicates that the impact force received by the protection plate 20 is very large. At this time, very large deformations will occur in the locally impacted area of the protection plate 20, and the deformation amount is greater than the second preset deformation amount. At this time, the impact detection module 101 is in the second state and outputs the second voltage. Among them, the second state can be the state of the impact detection module 101 when the protection plate 20 receives a very large impact force. The logic control module 102 outputs a second logic alarm signal according to the second voltage to alert the system monitoring center for timely processing of the protection plate 20.

[0056] It should be noted that when the impact energy received by the protection plate 20 is less than the first preset energy, it indicates that the impact force on the protection plate 20 is relatively small. At this time, small deformations will occur in the locally impacted area of the protection plate 20, and the amount of deformation is less than the first preset amount of deformation. At this time, the impact detection module 101 is in an initial state and outputs an initial voltage. Among them, the initial state can be the state of the impact detection module 101 when the protection plate 20 receives a relatively small impact force or no impact force. The logic control module 102 outputs a standard signal according to the initial voltage to inform the system monitoring center that there is no need to process the protection plate 20 for the time being.

[0057] It can be seen from this that the impact detection circuit 10 provided by the embodiment of the present application can use only a simple circuit to monitor the degree of impact damage received by the protection plate 20 in real time and achieve hierarchical alarms for different degrees of damage. This design avoids the use of relatively expensive detection components or sensors, thereby significantly reducing the detection cost of the impact detection circuit 10 for detecting the degree of damage of the protection plate 20.

[0058] It should be noted that the logic control module 102 can be arranged at the edge or outside of the protection plate 20, that is, the logic control module 102 can output corresponding standard signals and logic alarm signals when the impact detection module 101 is in the initial state, the first state or the second state, and there is no need to limit the specific position of the logic control module 102. Specifically, the logic control module 102 is similar to a PCB circuit board and will ultimately be encapsulated in a box. The protection plate 20 usually includes a buffer layer made of honeycomb material with a thickness of 5 mm. Among them, the buffer layer can also be made of a variety of materials, not limited to honeycomb-shaped buffer materials. Honeycombs also include aluminum honeycombs, stainless steel honeycombs, and even PP honeycombs, etc. This design not only reduces the overall weight but also provides good impact absorption performance. In actual applications, a small piece can be cut off at the edge of the buffer honeycomb layer of the protection plate 20, creating some space inside the protection plate 20 sufficient to place the logic control module 102. This method ensures that all the circuits are inside the protection plate 20, thus providing better protection and concealment. The entire box can also be placed outside the protection plate 20, and the circuits can be led out from inside the protection plate 20 to the outside. This design can provide more flexibility, making the circuit layout and maintenance more convenient. The box can be designed to fit closely with the protection plate 20 to ensure the firmness and stability of the overall structure.

[0059] It should be noted that the second preset energy is greater than the first preset energy. The first preset energy is the lowest threshold for detecting the impact energy, and the second preset energy is the highest threshold for detecting the impact energy. When the impact energy received by the protection plate 20 is less than the lowest threshold, the impact detection module 101 will be in the initial state. When the impact energy received by the protection plate 20 is greater than or equal to the highest threshold, the impact detection module 101 will change from the initial state to the second state. When the impact energy received by the protection plate 20 is greater than or equal to the lowest threshold and less than the highest threshold, the impact detection module 101 will change from the initial state to the first state.

[0060] Exemplarily, the first preset energy and the second preset energy can be adjusted and set according to the actual situation. For example, the first preset energy can be set to 100 J, and the second preset energy can be set to 300 J. The range of impact energy that the impact detection circuit 10 can monitor can be set to 100 J to 300 J. The first impact energy and the second preset energy can also be adjusted according to the type of the protection plate. The specific values of the first preset energy and the second preset energy are not limited herein.

[0061] It should be noted that only three states of the impact detection module 101 are shown in the embodiments of the present application, and it is not limited to these three states. The impact detection module 101 can also be in a third state, a fourth state, etc. Correspondingly, the impact detection module 101 will output a third voltage, a fourth voltage, etc., and the logic control module 102 will output a third logic alarm signal / fourth logic alarm signal according to the third voltage / fourth voltage. Thus, the hierarchical alarms for different damage degrees are more detailed and accurate. The impact suffered by the protection plate 20 is evaluated more precisely, and the corresponding alarm level is triggered accordingly, so as to improve the response ability and detection reliability of the impact detection circuit 10 to damage.

[0062] In an embodiment of the present application, the impact detection module 101 includes a plurality of parallel wire groups. The first ends of all the parallel wire groups are grounded, the second ends of all the parallel wire groups are electrically connected to a first power supply, and the output ends of all the parallel wire groups are electrically connected to the logic control module 102.

[0063] Specifically, setting a plurality of parallel wire groups can increase the coverage range of impact detection and improve the detection accuracy of the impact detection module 101. Due to different impact energies received by the protection plate 20, the states of the parallel wire groups will change, and further the voltage transmitted to the logic control module 102 will change. The logic control module 102 determines the corresponding logic alarm signal according to the input voltage and outputs the corresponding logic alarm signal to warn the system monitoring center so as to process the protection plate 20 in time.

[0064] It should be noted that there is a certain corresponding relationship between the proportion of the number of parallel wire groups with state changes in the total number of parallel wire groups and the degree of impact damage suffered by the protective plate 20. Therefore, the degree of impact damage suffered by the protective plate 20 can be determined according to the proportion of the number of parallel wire groups with state changes in the total number of parallel wire groups.

[0065] Exemplarily, Figure 2 Any of V1 to V11 shown can be used as the first power supply and can all be set to 5V.

[0066] In an embodiment of the present application, the parallel wire group includes at least two first wires 1011. The first ends of all the first wires 1011 are respectively electrically connected to the first power supply and the logic control module 102, and the second ends of all the first wires 1011 are grounded.

[0067] Specifically, when the protective plate 20 is impacted by an external force, one or two first wires in the parallel wire group, or all the wires in the parallel wire group will break, and the state of the parallel wire group will change. The change in the state of the parallel wire group will cause a change in the voltage output to the logic control module 102. The logic control module 102 determines the corresponding logic alarm signal according to the input voltage and outputs the corresponding logic alarm signal to alert the system monitoring center so as to process the protective plate 20 in a timely manner.

[0068] It should be noted that the arrangement of the first wires 1011 can be selected as a straight-line side-by-side arrangement, and the first wires in all the parallel wire groups are distributed on the protective plate 20. If all the first wires 1011 are evenly distributed over the entire protective plate 20 in a straight-line side-by-side arrangement, the degree of impact damage suffered by the protective plate 20 can be determined according to the proportion of the number of broken first wires 1011 in the total number of first wires 1011 in the parallel wire group.

[0069] Exemplarily, Figure 2It is shown that the impact detection module 101 includes 11 parallel wire groups, and each parallel wire group contains three first wires 1011. When the impact energy received by the protection plate 20 is less than the first preset energy, the number of disconnected first wires 1011 in each parallel wire group is less than 1, that is, the proportion of the disconnected first wires 1011 is less than 1 / 3, and the impact detection module 101 is in the initial state. At this time, the impact detection module 101 outputs an initial voltage to the logic control module 102, and the logic control module 102 determines the corresponding standard signal according to the initial voltage and outputs the standard signal to inform the system monitoring center that there is no need to process the protection plate 20 for the time being. When the impact energy received by the protection plate 20 is greater than or equal to the first preset energy and the impact energy received by the protection plate 20 is less than the second preset energy, the number of disconnected first wires 1011 in any one of the parallel wire groups is greater than or equal to 1 and less than 2, that is, the proportion of the disconnected first wires 1011 is greater than or equal to 1 / 3 and less than 2 / 3, and the impact detection module 101 is in the first state. At this time, the impact detection module 101 outputs a first voltage to the logic control module 102, and the logic control module 102 determines the corresponding first logic alarm signal according to the first voltage to warn the system monitoring center so as to process the protection plate 20 in a timely manner. When the impact energy received by the protection plate 20 is greater than or equal to the second preset energy, the number of disconnected first wires 1011 in any one of the parallel wire groups is greater than or equal to 2, that is, the proportion of the disconnected first wires 1011 is greater than or equal to 2 / 3, and the impact detection module 101 is in the second state. At this time, the impact detection module 101 outputs a second voltage to the logic control module 102, and the logic control module 102 determines the corresponding second logic alarm signal according to the second voltage to warn the system monitoring center so as to process the protection plate 20 in a timely manner.

[0070] It should be noted that if the first wires 1011 in multiple parallel wire groups are all broken, the output real-time voltage is determined according to the parallel wire group with the largest number of broken first wires 1011 (that is, the parallel wire group with the highest degree of damage), and the corresponding logic alarm signal is determined accordingly.

[0071] It should be noted that the arrangement of the first wire 1011 can also be set accordingly according to the position where the protection plate 20 is vulnerable to impact. For example, the first wire 1011 on the protection plate 20 near the vehicle head direction can be designed to be more dense. For example, the wire spacing can be set to 2 mm to improve the accuracy of impact detection. The first wire 1011 can cover the entire surface of the protection plate 20, so that the effective response range of the impact detection circuit 10 is larger. The spacing between two adjacent first wires 1011 needs to be controlled between 3 mm and 50 mm. If wires obtained through an etching process are used, smaller and more uniform spacing can be set, while eliminating the process requirements for wire arrangement. The preset impact energy required for detection can be adjusted by changing the material type of the first wire 1011 (such as enameled aluminum wire, enameled copper wire, carbon fiber, etc.), the shape of the first wire 1011 (such as cylindrical, flat), the diameter of the first wire 1011 (0.2 mm to 1.0 mm), or the structure of the first wire 1011 (whether it includes an insulating layer), etc., which is applicable to various types of protection plates 20, with high reliability and strong adaptability. That is, the number of parallel wire groups and the number of first wires 1011 in the parallel wire groups can be flexibly increased or decreased according to the size of the protection plate 20 and the detection accuracy requirements. Usually, the number of first wires 1011 in the parallel wire group is set to 2 to 10 roots.

[0072] Exemplarily, a plurality of first wires 1011 in the impact detection module 101 can be electrically connected to the corresponding plurality of logic control modules 102. When the state of the first wire 1011 changes (such as being disconnected), the corresponding logic control module 102 will output a corresponding logic alarm signal. After the driver or the system monitoring center receives the logic alarm signal, the position information of the damaged protection plate 20 can be obtained, and the position can be checked and processed in a timely manner. Therefore, the same number of logic control modules 102 as the first wires 1011 can be set to determine the position information of the impact on the protection plate 20. In order to obtain the position information of the impact on the protection plate 20, a PLC controller with multiple IO ports can also be set to analyze multiple input signals and output corresponding control signals.

[0073] In an embodiment of the present application, an insulating material is used for insulation between the first wire 1011 and the protection plate 20, and the insulating material is a film or an insulating layer on the outer wall of the first wire.

[0074] Specifically, the insulating material can prevent current leakage, reduce the risks of electric shock and fire, and protect the safety of personnel and property. At the same time, the insulating material can prevent accidental contact between wires or between a wire and other conductors, thus preventing the occurrence of a short circuit. The first wire 1011 used in this application can be a metal wire with a certain bending flexibility, such as an enameled wire - oxygen-free copper wire coated with polyimide insulation, or a conductive non-metal wire with an insulating layer, such as carbon fiber. That is, the first wire can be at least one of a metal etched wire, an enameled wire, and a carbon fiber wire.

[0075] In an embodiment of this application, as Figure 3 shown, the parallel wire group further includes a first resistor R1 and a plurality of second resistors R2. The first end of the first resistor R1 is used to be electrically connected to the first power supply. The second end of the first resistor R1 is electrically connected to the logic control module 102 and the first ends of all the second resistors R2 respectively. The second ends of the plurality of second resistors R2 are correspondingly electrically connected to the first ends of the plurality of first wires 1011.

[0076] Or, the second ends of the plurality of second resistors are correspondingly electrically connected to the first ends of the plurality of first wires; or, the second end of the first resistor R1 is electrically connected to the logic control module 102 and the first ends of all the first wires 1011 respectively. The first ends of the plurality of second resistors R2 are correspondingly electrically connected to the second ends of the plurality of first wires 1011, and the second ends of all the second resistors R2 are grounded.

[0077] Specifically, the first resistor R1 serves as a fixed voltage-dividing resistor, and the second resistor R2 serves as a current-limiting protection resistor to protect the first wire 1011 and the logic control module 102 from being damaged by overcurrent. When the protection plate 20 is impacted and the first wire 1011 is disconnected, the resistance in the circuit will increase, resulting in a sharp drop in current. Without the second resistor R2, due to the disconnection of the first wire 1011, the current received by the logic control module 102 may suddenly increase, which may damage the logic control module 102 or cause it to malfunction.

[0078] It should be noted that the second resistor R2 needs to be set to a specific resistance value. If the resistance value is too small, local heating is likely to occur, resulting in unnecessary energy loss. If the resistance value is too large, the change amplitude of the voltage signal in the impact detection circuit 10 will not be significant, thus affecting the detection function of the impact damage degree. If the first wire 1011 itself has a relatively high resistance value, the second resistor R2 can be omitted. The resistance value range of the second resistor R2 can be [1 kΩ, 100 kΩ].

[0079] In an embodiment of this application, as Figure 4As shown in the figure, the logic control module 102 includes a comparison unit 1021 and a signal output unit 1022. The comparison unit 1021 is electrically connected to the signal output unit 1022 and the impact detection module 101 respectively.

[0080] Specifically, the comparison unit 1021 is configured to output a level signal according to the real-time voltage, the first preset value, and the second preset value. The signal output unit 1022 outputs a logic alarm signal according to the level signal. That is, the comparison unit 1021 can receive the real-time voltage (initial voltage, first voltage, and second voltage) output by the impact detection module 101, and output a corresponding level signal according to the comparison result of the received real-time voltage and the preset values (first preset value and second preset value). The signal output unit 1022 outputs a corresponding logic alarm signal according to the corresponding level signal. Specifically, when the impact energy received by the protection plate 20 is less than the first preset energy, the comparison unit 1021 is configured to output a first level signal according to the initial voltage and the first preset value, and the signal output unit 1022 is configured to output a standard signal according to the first level signal. When the impact energy received by the protection plate 20 is greater than or equal to the first preset energy and the impact energy received by the protection plate 20 is less than the second preset energy, the comparison unit 1021 is configured to output a second level signal according to the first voltage, the first preset value, and the second preset value, and the signal output unit 1022 is configured to output a first logic alarm signal according to the second level signal. When the impact energy received by the protection plate 20 is greater than or equal to the second preset energy, the comparison unit 1021 is configured to output a third level signal according to the second voltage and the second preset value, and the signal output unit 1022 outputs a second logic alarm signal according to the third level signal.

[0081] In an embodiment of the present application, as Figure 5 shown, the comparison unit 1021 includes a voltage comparison chip U1. The first input terminal and the second input terminal of the voltage comparison chip U1 are both electrically connected to the impact detection module 101. The third input terminal of the voltage comparison chip U1 is used to receive the first preset value, and the fourth input terminal of the voltage comparison chip U1 is used to receive the second preset value. The first output terminal and the second output terminal of the voltage comparison chip U1 are both electrically connected to the signal output unit 1022.

[0082] Specifically, the +IN pin (pin 3) of the voltage comparison chip U1 serves as the first input terminal of the voltage comparison chip U1, the -IN pin (pin 6) of the voltage comparison chip U1 serves as the second input terminal of the voltage comparison chip U1, the +IN pin (pin 5) of the voltage comparison chip U1 serves as the third input terminal of the voltage comparison chip U1, the -IN pin (pin 2) of the voltage comparison chip U1 serves as the fourth input terminal of the voltage comparison chip U1, the OUT pin (pin 1) of the voltage comparison chip U1 serves as the first output terminal of the voltage comparison chip U1, and the OUT pin (pin 7) of the voltage comparison chip U1 serves as the second output terminal of the voltage comparison chip U1. The voltage comparison chip U1 can compare the magnitude relationship between the voltage output by the impact detection module 101 and the first preset value / second preset value, and output a corresponding level signal according to the comparison result. If the initial voltage output by the voltage detection module 101 is less than the first preset value, the voltage comparison chip U1 can output a first level signal at the second output terminal. If the second voltage output by the voltage detection module 101 is greater than or equal to the second preset value, the voltage comparison chip U1 can output a third level signal at the first output terminal. If the first voltage output by the voltage detection module 101 is greater than or equal to the first preset value and less than the second preset value, the voltage comparison chip U1 can output a second level signal at both the first output terminal and the second output terminal.

[0083] Exemplarily, the designer can select the model of the voltage comparison chip U1 according to the actual situation. For example, the model of the voltage comparison chip U1 can be set to LM2903DR.

[0084] It should be noted that the eighth resistor R8 and the ninth resistor R9 both serve as open-drain output pull-up resistors. The first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 serve as signal output or input filter capacitors. The fifth capacitor C5 serves as a bypass capacitor to increase the stability of the 3.3V power supply.

[0085] Exemplarily, the resistance values of the eighth resistor R8 and the ninth resistor R9 can both be selected as 1kΩ. The capacitances of the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 can all be selected as 100nF, and the withstand voltages can all be 50V.

[0086] It should be noted that both the first preset value and the second preset value can be provided by the preset voltage module. The circuit connection schematic diagram of the preset voltage module is as Figure 6 shown. Among them, the first preset value is the voltage value at the second end of the tenth resistor R10, that is, the voltage value after the 3.3V voltage is divided by the tenth resistor R10 and the eleventh resistor R11. The second preset value is the voltage value at the second end of the twelfth resistor R12, that is, the voltage value after the 3.3V voltage is divided by the twelfth resistor R12 and the thirteenth resistor R13.

[0087] Exemplarily, the resistance values of the tenth resistor R10 and the twelfth resistor R12 can both be selected as 2 kΩ. The resistance value of the eleventh resistor R11 can be selected as 1.47 kΩ. The resistance value of the thirteenth resistor R13 can be selected as 5.36 kΩ. It can be seen therefrom that the first preset value obtained by dividing the 3.3 V voltage by the tenth resistor R10 and the eleventh resistor R11 is 1.4 V, and the second preset value obtained by dividing the 3.3 V voltage by the twelfth resistor R12 and the thirteenth resistor R13 is 2.4 V. Among them, the first preset value of 1.4 V is used as the lower threshold voltage, and the second preset value of 2.4 V is used as the upper threshold voltage. If the initial voltage output by the voltage detection module 101 is less than 1.4 V, the voltage comparison chip U1 can output a first level signal at the second output terminal. If the second voltage output by the voltage detection module 101 is greater than or equal to 2.4 V, the voltage comparison chip U1 can output a third level signal at the second output terminal. If the first voltage output by the voltage detection module 101 is greater than or equal to 1.4 V and less than 2.4 V, the voltage comparison chip U1 can output a second level signal at both the first output terminal and the second output terminal.

[0088] In an embodiment of the present application, the signal output unit 1022 includes a first signal output sub-unit, a second signal output sub-unit, and a third signal output sub-unit, and the first signal output sub-unit, the second signal output sub-unit, and the third signal output sub-unit are all electrically connected to the comparison unit 1021.

[0089] Specifically, the first signal output sub-unit, the second signal output sub-unit, and the third signal output sub-unit can all output corresponding logic alarm signals according to the level signals. Specifically, the first signal output sub-unit is used to output a standard signal according to the first level signal, the second signal output sub-unit is used to output a first logic alarm signal according to the second level signal, and the third signal output sub-unit is used to output a second logic alarm signal according to the third level signal.

[0090] It should be noted that both the first logic alarm signal and the second logic alarm signal can be acoustic and optical alarms.

[0091] In an embodiment of the present application, as Figure 7 shown, the first signal output sub-unit includes a third resistor R3 and a first triode VT1. The first end of the third resistor R3 is electrically connected to the comparison unit 1021, the second end of the third resistor R3 is electrically connected to the base of the first triode VT1, the collector of the first triode VT1 is used to be electrically connected to the second power supply, and the emitter of the first triode VT1 is grounded.

[0092] Specifically, the third resistor R3 is connected to the base of the first triode VT1, which functions as a current-limiting resistor to prevent excessive current flowing into the base of the first triode VT1 from damaging the first triode VT1, and at the same time ensures that the current at the base of the first triode VT1 is within a safe range. The first triode VT1 acts as a switching device and functions as a switch. When the comparison unit 1021 outputs a first-level signal, the voltage at the base of the first triode VT1 is pulled up, and a large amount of current flows into the base of the first triode VT1. The first triode VT1 is in a saturated conduction state, forming a loop among the second power supply, the alarm, and the first triode VT1, and the alarm is powered on to give an alarm and output a standard signal.

[0093] Exemplarily, designers can select the types and models of the second power supply and the first triode VT1 according to the actual situation. For example, the second power supply can be 3.3V, the type of the first triode VT1 can be selected as NPN type, and the model of the first triode VT1 can be selected as PMBT3904.215. Designers can also select the resistance value of the third resistor R3 according to the actual situation. For example, the resistance value of the third resistor R3 can be selected as 10 kΩ.

[0094] It should be noted that the fourteenth resistor R14 serves as a pull-down resistor to improve the signal stability. The fifteenth resistor R15 serves as a current-limiting resistor to prevent excessive current flowing into LED1 from damaging LED1. Among them, the color of the LED1 indicator can be green.

[0095] Exemplarily, designers can also select the resistance values of the fourteenth resistor R14 and the fifteenth resistor R15 according to the actual situation. For example, the resistance value of the fourteenth resistor R14 can be selected as 18 kΩ, and the resistance value of the fifteenth resistor R15 can be selected as 200 Ω.

[0096] In an embodiment of the present application, as Figure 8 shown, the second signal output sub-unit includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second triode VT2, a third triode VT3, and a first switching tube Q1. The first end of the fourth resistor R4 is electrically connected to the comparison unit 1021, the second end of the fourth resistor R4 is electrically connected to the base of the second triode VT2, the collector of the second triode VT2 is respectively electrically connected to the second power supply and the first end of the fifth resistor R5, the base of the third triode VT3 is electrically connected to the second end of the fifth resistor R5, the emitters of the third triode VT3 and the second triode VT2 are both grounded, the collector of the third triode VT3 is electrically connected to the first end of the sixth resistor R6, the gate of the first switching tube Q1 is electrically connected to the second end of the sixth resistor R6, the source of the first switching tube Q1 is electrically connected to the second power supply, and the drain of the first switching tube Q1 is grounded.

[0097] Specifically, the fourth resistor R4 is connected to the base of the second triode VT2, which plays a current-limiting role to prevent excessive current flowing into the base of the second triode VT2 and damaging the second triode VT2, while ensuring that the current at the base of the second triode VT2 is within a safe range. The second triode VT2 acts as a switching device and plays a switching role. The fifth resistor R5 is connected to the base of the third triode VT3, which plays a current-limiting role to prevent excessive current flowing into the base of the third triode VT3 and damaging the third triode VT3, while ensuring that the current at the base of the third triode VT3 is within a safe range. The third triode VT3 acts as a switching device and plays a switching role. The sixth resistor R6 is connected to the gate of the first switching transistor Q1, which plays a current-limiting role to prevent excessive current flowing into the gate of the first switching transistor Q1 and damaging the first switching transistor Q1. The sixth resistor R6 is also used for voltage division to increase the voltage difference between the gate and source of the first switching transistor Q1. The first switching transistor Q1 acts as a switching device and plays a switching role. When the comparison unit 1021 outputs a second-level signal, the voltage at the base of the second triode VT2 is pulled down, and the second triode VT2 is in an off state, so that the base of the third triode VT3 is in a high-level state, the third triode VT3 conducts, and then the gate of the first switching transistor Q1 is in a low-level state, the first switching transistor Q1 conducts, forming a loop among the second power supply, the alarm and the first switching transistor Q1, the alarm gets powered on and alarms, outputting a first logic alarm signal.

[0098] Exemplarily, the designer can select the types and models of the second triode VT2, the third triode VT3 and the first switching transistor Q1 according to the actual situation. For example, the types of both the second triode VT2 and the third triode VT3 can be selected as NPN type, and the models of both the second triode VT2 and the third triode VT3 can be selected as PMBT3904.215. The type of the first switching transistor Q1 can be selected as PMOS, and the model of the first switching transistor Q1 can be selected as the initial voltage O3401A. The designer can also select the resistance values of the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 according to the actual situation. For example, the resistance values of both the fourth resistor R4 and the fifth resistor R5 can be selected as 1 kΩ, and the resistance value of the sixth resistor R6 can be selected as 390 kΩ.

[0099] It should be noted that the sixteenth resistor R16 and the eighteenth resistor R18 act as pull-down resistors to improve the signal stability. The nineteenth resistor R19 acts as a pull-up resistor to improve the signal stability. The twentieth resistor R20 acts as a current-limiting resistor to prevent excessive current flowing into the LED2 and damaging the LED2. Among them, the color of the LED2 indicator can be yellow. The first diode D1 and the second diode D2 are both isolation diodes to prevent ON-RED and ON-GREEN from interfering with each other.

[0100] Exemplarily, the designer can select the resistance values of the sixteenth resistor R16, the eighteenth resistor R18, the nineteenth resistor R19, and the twentieth resistor R20 according to the actual situation. For example, the resistance values of the sixteenth resistor R16 and the eighteenth resistor R18 can both be selected as 18 kΩ, the resistance value of the nineteenth resistor R19 can be selected as 1.5 MΩ, and the resistance value of the twentieth resistor R20 can be selected as 200 Ω.

[0101] In an embodiment of the present application, as Figure 9 shown, the third signal output sub-unit includes a seventh resistor R7 and a fourth triode VT4. The first end of the seventh resistor R7 is electrically connected to the comparison unit 1021, the second end of the seventh resistor R7 is electrically connected to the base of the fourth triode VT4, the collector of the fourth triode VT4 is used to be electrically connected to the second power supply, and the emitter of the fourth triode VT4 is grounded.

[0102] Specifically, the seventh resistor R7 is connected to the base of the fourth triode VT4, which plays a current-limiting role to prevent the current flowing into the base of the fourth triode VT4 from being too large and damaging the fourth triode VT4, while ensuring that the current at the base of the fourth triode VT4 is within a safe range. The fourth triode VT4 serves as a switching device and plays a switching role. When the comparison unit 1021 outputs a third-level signal, the voltage at the base of the fourth triode VT4 is pulled up, and a large amount of current flows into the base of the fourth triode VT4. The fourth triode VT4 is in a saturated conduction state, causing the second power supply, the alarm, and the fourth triode VT4 to form a loop, and the alarm is powered on to give an alarm and output a second logic alarm signal.

[0103] Exemplarily, the designer can select the type and model of the fourth triode VT4 according to the actual situation. For example, the type of the fourth triode VT4 can be selected as NPN type, and the model of the fourth triode VT4 can be selected as PMBT3904.215. The designer can also select the resistance value of the seventh resistor R7 according to the actual situation. For example, the resistance value of the seventh resistor R7 can be selected as 10 kΩ.

[0104] It should be noted that the twenty-first resistor R21 serves as a pull-down resistor to improve the signal stability. The twenty-second resistor R22 serves as a current-limiting resistor to prevent the current flowing into LED3 from being too large and damaging LED3. Among them, the color of the LED3 indicator light can be red.

[0105] Exemplarily, the designer can also select the resistance values of the twenty-first resistor R21 and the twenty-second resistor R22 according to the actual situation. For example, the resistance value of the twenty-first resistor R21 can be selected as 18 kΩ, and the resistance value of the twenty-second resistor R22 can be selected as 200 Ω.

[0106] It should be noted that when LED1 is on, it can indicate a standard signal, and at this time it is in the "standard state". When LED2 is on, it can indicate the first logical alarm signal, and at this time it is in the "secondary alarm". When LED3 is on, it can indicate the second logical alarm signal, and at this time it is in the "primary alarm".

[0107] It should be noted that according to the circuit connection schematic diagrams of the first signal output sub-unit, the second signal output sub-unit, and the third signal output sub-unit described above, it can be known that the first level signal can be a high-level signal, the third level signal can be a high-level signal, and the second level signal can be a low-level signal. If the comparison unit 1021 outputs a high-level signal, at this time, LED1 or LED3 is powered on and emits light, and LED2 cannot be powered on and emit light. Therefore, only when the comparison unit 1021 outputs a low-level signal, LED2 will be powered on and emit light.

[0108] To describe the working principle of this solution more clearly, the following will be specifically described in combination with several embodiments.

[0109] Embodiment 1: As Figure 10 shown, the impact detection module 101 includes a parallel wire group. There are three first wires 1011 in the parallel wire group. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After the three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes one of the first wires 1011 to break. At this time, the resistance at both ends of all the parallel first wires 1011 is 500 Ω, and the voltage value at both ends of all the parallel first wires 1011 is 1.67 V. 1.67 V is higher than the lower threshold voltage (1.40 V) and lower than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs the first logical alarm signal, and it is determined as the "secondary alarm" (the yellow light is on).

[0110] Embodiment 2: As Figure 11As shown in the figure, the impact detection module 101 includes a parallel wire group. There are three first wires 1011 in the parallel wire group. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After the three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes two first wires 1011 to break. At this time, the resistance across all the parallel first wires 1011 is 1000 Ω, and the voltage value across all the parallel first wires 1011 is 2.50 V. 2.50 V is higher than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a second logic alarm signal, and it is determined as a "level 1 alarm" (the red light is on).

[0111] Embodiment 3: As Figure 12 As shown in the figure, the impact detection module 101 includes a parallel wire group. There are three first wires 1011 in the parallel wire group. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After the three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes all three first wires 1011 to break. At this time, the resistance value across all the parallel first wires 1011 is positive infinity, and the voltage value across all the parallel first wires 1011 is 5.00 V. 5.00 V is higher than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a second logic alarm signal, and it is determined as a "level 1 alarm" (the red light is on).

[0112] Embodiment 4: As Figure 13As shown in the figure, the impact detection module 101 includes two parallel wire groups. Each parallel wire group is provided with three first wires 1011. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After the three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes one first wire 1011 in the first parallel wire group and one first wire 1011 in the second parallel wire group to break. At this time, the resistance values at both ends of the two parallel wire groups are both 500 Ω, and the voltage values at both ends of the two parallel wire groups are both 1.67 V. 1.67 V is higher than the lower threshold voltage (1.40 V) and lower than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a first logic alarm signal, and it is determined as a "secondary alarm" (the yellow light is on).

[0113] Embodiment 5: As Figure 14 As shown in the figure, the impact detection module 101 includes two parallel wire groups. Each parallel wire group is provided with three first wires 1011. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After the three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes one first wire 1011 in one parallel wire group and two first wires 1011 in another parallel wire group to break. At this time, the resistance values at both ends of the two parallel wire groups are 500 Ω and 1000 Ω respectively, and the voltage values at both ends of the two parallel wire groups are 1.67 V and 2.5 V respectively. 1.67 V is higher than the lower threshold voltage (1.40 V) and lower than the upper threshold voltage (2.40 V), and 2.50 V is higher than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a second logic alarm signal, and it is determined as a "primary alarm" (the red light is on).

[0114] Embodiment 6: As Figure 15As shown in the figure, the impact detection module 101 includes a parallel wire group. There are two first wires 1011 in the parallel wire group. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes one first wire 1011 to break. At this time, the resistance value at both ends of all the parallel first wires 1011 is 1000 Ω, and the voltage value at both ends of all the parallel first wires 1011 is 2.5 V. 2.50 V is higher than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a second logic alarm signal, and it is determined as a "first-level alarm" (the red light is on).

[0115] Embodiment VII: As Figure 16 As shown in the figure, the impact detection module 101 includes a parallel wire group. There are ten first wires 1011 in the parallel wire group. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. A second resistor R2 is connected in series on each first wire 1011. After three first wires 1011 are connected in parallel, a protection resistor R1 (1000 Ω) is connected in series. The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes any four first wires 1011 to break. At this time, the resistance value at both ends of all the parallel first wires 1011 is 166.7 Ω, and the voltage value at both ends of all the parallel first wires 1011 is 1.875 V. 1.875 V is higher than the lower threshold voltage (1.40 V) and lower than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a first logic alarm signal, and it is determined as a "second-level alarm" (the yellow light is on).

[0116] Embodiment VIII: As Figure 17 As shown in the figure, the impact detection module 101 includes a parallel wire group. There are three first wires 1011 in the parallel wire group. The first wires 1011 are arranged side by side in a straight line. The distance between adjacent first wires 1011 is set to 10 mm. Each first wire 1011 has a specific resistance value (such as 1000 Ω). The battery voltage is 5.00 V. If the impact energy received by the protection plate 20 causes one first wire 1011 to break. At this time, the resistance value at both ends of all the parallel first wires 1011 is 500 Ω, and the voltage value at both ends of all the parallel first wires 1011 is 1.67 V. 1.67 V is higher than the lower threshold voltage (1.40 V) and lower than the upper threshold voltage (2.40 V). At this time, the logic control module 102 outputs a first logic alarm signal, and it is determined as a "second-level alarm" (the yellow light is on).

[0117] The present application also discloses a protection plate 20, as Figure 18 shown. The protection plate 20 includes a protection plate body and at least one of the above-mentioned impact detection circuits 10. The protection plate body includes a first protection layer 201, an impact-resistant layer 202, a buffer layer 203, and a second protection layer 204. The buffer layer 203 is disposed on the second protection layer 204, the impact-resistant layer 202 is disposed on the buffer layer 203, the first protection layer 201 is disposed on the impact-resistant layer 202, and the impact detection circuit 10 is disposed between the first protection layer 201 and the impact-resistant layer 202, or the impact detection circuit 10 is disposed between the impact-resistant layer 202 and the buffer layer 203, or the impact detection circuit 10 is disposed between the buffer layer 203 and the second protection layer 204. The impact detection modules 101 in all the impact detection circuits 10 are distributed on the protection plate body, and the logic control modules 102 in all the impact detection circuits 10 are all disposed outside the protection plate body.

[0118] Specifically, Figure 18 the impacted surface shown in is the side of the protection plate that receives the impact energy. Both the first protection layer 201 and the second protection layer 204 provide preliminary protection to prevent external objects from directly contacting the internal sensitive components, and can also reduce the impact force when the protection plate is impacted. The impact detection circuit 10 can detect the impact situation of the protection plate and output a corresponding alarm signal. The impact-resistant layer 202 is made of a hard material, such as high-strength steel plate or high-strength plastic, to protect the internal components of the protection plate from the influence of external impacts. The buffer layer 203 is a buffer layer made of aluminum, stainless steel, or polypropylene, and is a material with an energy-absorbing and buffering function, such as aluminum honeycomb, which is usually used to absorb and disperse the impact energy and reduce the damage to the internal components.

[0119] By providing at least one impact detection circuit 10 on the protection plate 20, a standard signal can be output when the impact energy received by the protection plate 20 is less than the first preset energy, a first logic alarm signal can be output when the impact energy received by the protection plate 20 is greater than or equal to the first preset energy and less than the second preset energy, and a second logic alarm signal can be output when the impact energy received by the protection plate 20 is greater than the second preset energy. This is to alert the driver or the system monitoring center so as to process the protection plate 20 in a timely manner. The impact damage degree of the protection plate 20 can be monitored in real time, and a graded alarm for different damage degrees can be realized. This design avoids the use of relatively expensive detection elements or sensors, thereby significantly reducing the detection cost of the impact detection circuit 10 for detecting the damage degree of the protection plate 20. At the same time, by providing a plurality of impact detection circuits 10 on the protection plate 20, the driver or the system monitoring center can obtain the position information of the impact damage of the protection plate 20 according to the received logic alarm signal, improving the accuracy of impact detection.

[0120] It should be noted that each layer of the protective plate 20 is adhered by a hot melt adhesive film, that is, the insulating material outside the etched wire can be removed, and the hot melt adhesive film is used as the insulating material.

[0121] It should be noted that the impact detection circuit 10 can be arranged on a single-layer board structure, or between simple sandwich structures, or in a composite board with a complex structure. The protective plate for the application of the impact detection circuit 10 and the specific setting position are not limited herein.

[0122] It should be noted that the impact energy level can be estimated by arranging multiple layers of impact detection circuits 10 in a direction perpendicular to the protective plate 20. Two layers of impact detection circuits 10 are connected in parallel, and the severity of damage to the protective plate 20 is judged by detecting whether there is voltage in the detection circuit.

[0123] Since the processing and functions achieved by the protective plate in this embodiment are basically corresponding to the embodiments, principles and examples of the foregoing impact detection circuit, for the details not described in the description of this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments, and details are not repeated here.

[0124] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An impact detection circuit, applied to a protective plate, characterized in that: It includes an impact detection module and a logic control module, wherein the impact detection module is electrically connected to the logic control module; The impact detection module is used to output a real-time voltage according to the impact energy received by the protective plate, and the logic control module is used to output a logic alarm signal according to the real-time voltage.

2. The impact detection circuit according to claim 1, characterized in that: The real-time voltage includes a first voltage and a second voltage, and the logic alarm signal includes a first logic alarm signal and a second logic alarm signal; When the impact energy received by the protective plate is greater than or equal to the first preset energy and the impact energy received by the protective plate is less than the second preset energy, the impact detection module is in the first state and outputs the first voltage, and the logic control module is used to output the first logic alarm signal according to the first voltage; When the impact energy received by the protective plate is greater than or equal to the second preset energy, the impact detection module is in the second state and outputs the second voltage, and the logic control module is used to output the second logic alarm signal according to the second voltage.

3. The impact detection circuit according to claim 1, characterized in that: The impact detection module includes a plurality of parallel wire groups, the first ends of all the parallel wire groups are grounded, the second ends of all the parallel wire groups are electrically connected to the first power supply, and the output ends of all the parallel wire groups are electrically connected to the logic control module.

4. The impact detection circuit according to claim 3, characterized in that: The parallel wire group includes at least two first wires, the first ends of all the first wires are electrically connected to the first power supply and the logic control module respectively, and the second ends of all the first wires are grounded.

5. The impact detection circuit according to claim 4, characterized in that: The parallel wire group also includes a first resistor and multiple second resistors, the first end of the first resistor is used to be electrically connected to the first power supply, the second end of the first resistor is respectively electrically connected to the logic control module and the first ends of all the second resistors, and the second ends of the multiple second resistors are correspondingly electrically connected to the first ends of the multiple first wires; or, the second end of the first resistor is respectively electrically connected to the logic control module and the first end of all the first wires, the first ends of the multiple second resistors are correspondingly electrically connected to the second ends of the multiple first wires, and the second ends of all the second resistors are grounded.

6. The impact detection circuit according to claim 1, characterized in that: The logic control module includes a comparison unit and a signal output unit, and the comparison unit is electrically connected to the signal output unit and the impact detection module respectively; The comparison unit is used to output a level signal according to the real-time voltage, the first preset value and the second preset value, and the signal output unit outputs the logic alarm signal according to the level signal.

7. The impact detection circuit according to claim 6, characterized in that: The comparison unit includes a voltage comparison chip, a first input terminal of the voltage comparison chip and a second input terminal of the voltage comparison chip are both electrically connected to the impact detection module, a third input terminal of the voltage comparison chip is used to receive the first preset value, a fourth input terminal of the voltage comparison chip is used to receive the second preset value, and a first output terminal of the voltage comparison chip and a second output terminal of the voltage comparison chip are both electrically connected to the signal output unit.

8. The impact detection circuit according to claim 6, characterized in that: The level signal includes a first level signal, a second level signal and a third level signal, the signal output unit includes a first signal output subunit, a second signal output subunit and a third signal output subunit, the first signal output subunit, the second signal output subunit and the third signal output subunit are all electrically connected to the comparison unit, the first signal output subunit is used to output a standard signal according to the first level signal, the second signal output subunit is used to output a first logic alarm signal according to the second level signal, and the third signal output subunit is used to output a second logic alarm signal according to the third level signal.

9. The impact detection circuit according to claim 8, characterized in that: The first signal output subunit includes a third resistor and a first transistor, the first end of the third resistor is electrically connected to the comparison unit, the second end of the third resistor is electrically connected to the base of the first transistor, the collector of the first transistor is used to be electrically connected to the second power supply, and the emitter of the first transistor is grounded; The second signal output subunit includes a fourth resistor, a fifth resistor, a sixth resistor, a second triode, a third triode and a first switch tube, the first end of the fourth resistor is electrically connected to the comparison unit, the second end of the fourth resistor is electrically connected to the base of the second triode, the collector of the second triode is electrically connected to the second power supply and the first end of the fifth resistor, the base of the third triode is electrically connected to the second end of the fifth resistor, the emitter of the third triode and the emitter of the second triode are both grounded, the collector of the third triode is electrically connected to the first end of the sixth resistor, the gate of the first switch tube is electrically connected to the second end of the sixth resistor, the source of the first switch tube is electrically connected to the second power supply, and the drain of the first switch tube is grounded; The third signal output subunit includes a seventh resistor and a fourth transistor, the first end of the seventh resistor is electrically connected to the comparison unit, the second end of the seventh resistor is electrically connected to the base of the fourth transistor, the collector of the fourth transistor is used to be electrically connected to the second power supply, and the emitter of the fourth transistor is grounded.

10. A protective plate, characterized in that: It comprises a protective plate body and at least one impact detection circuit as described in any one of claims 1 to 9, wherein the protective plate body comprises a first protective layer, an anti-impact layer, a buffer layer, and a second protective layer, wherein the buffer layer is arranged on the second protective layer, the anti-impact layer is arranged on the buffer layer, the first protective layer is arranged on the anti-impact layer, the impact detection circuit is arranged between the first protective layer and the anti-impact layer, or the impact detection circuit is arranged between the anti-impact layer and the buffer layer, or the impact detection circuit is arranged between the buffer layer and the second protective layer.

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