Vehicle anti-interference control device

Abstract

The present invention proposes a vehicle anti-interference control device, which relates to the technical field of wheel signal processing of electric vehicles; the device comprises a power module, a switch module, a voltage stabilizing module and a current diversion module; the first end of the power module is grounded, the second end of the power module is connected to the first end of the switch module, the second end of the switch module is connected to the first end of the voltage stabilizing module, the current diversion module comprises a first transistor Q1, the second end of the voltage stabilizing module is connected to the base of the first transistor Q1; the collector of the first transistor Q1 is connected to the output end of a wheel movement signal, and the emitter of the first transistor Q1 is grounded; the output end of the wheel movement signal is connected to an anti-theft alarm module; when the switch module is disconnected, the first transistor Q1 is not turned on, and the wheel movement signal is sent to the anti-theft alarm module for monitoring; when the switch module is closed, the first transistor Q1 is turned on, and the wheel movement signal is grounded via the first transistor Q1, thereby preventing the wheel movement signal from interfering with peripheral circuits and wiring harnesses, ensuring normal communication of the vehicle, and ensuring personal and property safety.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel signal processing of electric vehicles, and in particular to a vehicle anti-interference control device. Background Art

[0002] Electric vehicles (e-bikes, e-scooters, or electric cars) are becoming increasingly popular as convenient, green, and environmentally friendly products that utilize new energy. Anti-theft features have become a top concern for users.

[0003] Currently, basic anti-theft features are implemented by detecting vehicle wheel rotation signals. When the vehicle is not in motion, the rotation of the wheels drives the motor, and the coils within the motor cut through the magnetic lines of force (the magnetic field generated by the permanent magnets within the motor), generating a wheel voltage signal through electromagnetic induction. As the wheel speed increases from slow to fast, the amplitude and frequency of the wheel signal increase. By collecting and analyzing the amplitude and frequency of the wheel voltage signal, it is possible to determine whether the wheel is rotating. The wheel signal indicates whether the vehicle's wheels are rotating. By determining whether the vehicle's wheels are rotating when not in motion, it can be used to determine whether the vehicle has been stolen. While the vehicle is in motion, the control device uses calculations to adjust the direction and magnitude of the current flowing through the motor coils to drive the motor. The wheel signal is connected to the motor coils. During motor operation, the interaction between the motor coils and the motor magnetic field results in a relatively high amplitude and frequency.

[0004] Vehicle design and manufacturing require the transmission of wheel movement signals within the wiring harness to electrical instruments or anti-theft devices with anti-theft functions. Currently, the motor's wheel movement signals are directly transmitted to the anti-theft instruments or devices for collection, processing, and detection of theft. However, during normal vehicle operation, the transmission of wheel movement signals can cause significant electromagnetic interference to peripheral circuits and communication signal transmission lines within the wiring harness, potentially leading to vehicle communication interruptions or malfunctions, resulting in property and personal injury. Summary of the Invention

[0005] The present invention provides a vehicle anti-interference control device, which can prevent wheel movement signals from interfering with peripheral circuits and wiring harnesses when the wheels are running normally, thereby ensuring normal vehicle communication and personal and property safety.

[0006] The present invention provides a vehicle anti-interference control device, comprising a power module, a switch module, and a drainage module; a first end of the power module is grounded, a second end of the power module is connected to the first end of the switch module, and a second end of the switch module is connected to the first end of the drainage module; a second end of the drainage module is grounded, and a third end of the drainage module is connected to an output end of a wheel rotation signal; wherein the output end of the wheel rotation signal is also connected to an anti-theft alarm module;

[0007] The power supply module is used to provide power to the drainage module;

[0008] The switch module is used to control the on and off of the drainage module by closing and opening it;

[0009] The diversion module is used to ground the rotation signal when it is turned on, and to send the rotation signal to the anti-theft alarm module when it is turned off.

[0010] In an optional embodiment, a voltage stabilizing module is further included, the second end of the switch module is connected to the first end of the voltage stabilizing module, and the second end of the voltage stabilizing module is connected to the drainage module.

[0011] In an optional embodiment, the diversion module includes a first transistor, the output end of the rotation signal is connected to the collector of the first transistor, the voltage stabilizing module is connected to the base of the first transistor, and the emitter of the first transistor is grounded.

[0012] In an optional embodiment, the first transistor is an NPN transistor, and the drainage module also includes a first resistor, a second resistor, a third resistor and a fourth resistor, one end of the first resistor is connected to the output end of the wheel signal, the other end of the first resistor is respectively connected to the collector of the first transistor and one end of the fourth resistor, and the other end of the fourth resistor is connected to the anti-theft alarm module; one end of the third resistor is connected to the base of the first transistor, and the other end of the third resistor is connected to the emitter of the first transistor; one end of the second resistor is connected to the base of the first transistor, and the other end of the second resistor is connected to the voltage stabilizing module.

[0013] In an optional implementation, the voltage stabilizing module is a first voltage stabilizing diode or a first voltage stabilizer.

[0014] In an optional embodiment, a control module and a voltage stabilizing module are further included, wherein the first end of the voltage stabilizing module is respectively connected to the second end of the power supply module and the first end of the switch module; the second end of the switch module is connected to one end of the control module, and the other end of the control module is connected to the first end of the drainage module.

[0015] In an optional embodiment, the control module includes a first controller, a fifth resistor and a sixth resistor; the second end of the switch module is connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the first end of the sixth resistor, and the second end of the sixth resistor and the first end of the power supply module are commonly grounded; the fourth pin of the controller is connected to the second end of the fifth resistor, and the sixth pin of the controller is connected to the first end of the drainage module.

[0016] In an optional embodiment, the switch module is a first switch, the power module includes a first battery and a first fuse, the negative pole of the first battery is grounded, the positive pole of the first battery is connected to the first end of the first fuse, and the second end of the first fuse is connected to the first end of the first switch.

[0017] The beneficial effects of the present invention are: the vehicle anti-interference control device of the present invention includes a power supply module, a switch module and a drainage module. The power supply module is used to power the circuit, and the switching module is used to control the closing and opening of the circuit; the second end of the switch module is connected to the first end of the drainage module, the second end of the drainage module is grounded, and the third end of the drainage module is connected to the output end of the wheel signal; when the switch module is disconnected, the wheel signal is directly sent to the anti-theft alarm module for monitoring; when the switch module is closed, the wheel signal is grounded through the drainage module, thereby avoiding the wheel signal from interfering with the surrounding circuits and wiring harnesses, and greatly reducing the interference problem caused by the wheel signal transmitted in the circuit to the whole vehicle communication; this embodiment can ensure normal vehicle communication, reduce the electromagnetic interference of the whole vehicle during driving, improve the safety of signal transmission during driving, and thus improve the control performance and safety of the whole vehicle, and ensure personal and property safety.

[0018] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a system principle diagram of embodiment 1 of the present invention;

[0022] Figure 2 This is a circuit diagram of embodiment 1 of the present invention;

[0023] Figure 3 This is a circuit diagram of the second embodiment of the present invention;

[0024] Figure 4 This is a circuit diagram of embodiment 3 of the present invention;

[0025] Figure 5 The waveform diagram of the signal between the first resistor and the fourth resistor before improvement, and the waveform diagram of the signal of a wiring harness interfered by the wheel movement signal;

[0026] Figure 6 This is a waveform diagram of the signal between the first resistor and the fourth resistor after improvement, as well as a waveform diagram of the signal of a wiring harness interfered by the wheel rotation signal. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] To facilitate understanding of this embodiment, a vehicle anti-interference control device disclosed in the present invention is described in detail below through an embodiment.

[0029] Example 1

[0030] Reference Figure 1 This embodiment provides a vehicle anti-interference control device, including a power module, a switch module, a voltage stabilizing module, and a current diversion module; a first terminal of the power module is grounded, a second terminal of the power module is connected to a first terminal of the switch module, a second terminal of the switch module is connected to a first terminal of the voltage stabilizing module, and a second terminal of the voltage stabilizing module is connected to a first terminal of the current diversion module; a third terminal of the current diversion module is connected to an output terminal of a wheel rotation signal; wherein the output terminal of the wheel rotation signal is further connected to an anti-theft alarm module;

[0031] Among them, the switch module is used to control the conduction and shutdown of the drainage module by closing and opening it; the drainage module is used to ground the rotation signal when it is turned on, and send the rotation signal to the anti-theft alarm module when it is turned off.

[0032] Specifically, the vehicle in this embodiment typically refers to an electric bicycle, electric motorcycle, or electric car, and the power module is the battery that provides power to the entire vehicle. The switch module is used to control the vehicle's on and off status. The voltage regulator module is used to provide a stable voltage to the circuit to prevent excessive wheel rotation signals from affecting the power module and other circuits. The current diversion module is used to divert the wheel rotation signal to ground when the switch module turns the vehicle on. When the switch module is turned off, the wheel rotation signal is directly sent to the anti-theft alarm module, allowing the anti-theft alarm module to monitor the wheel rotation signal.

[0033] Preferably, if Figure 2As shown, the switch module only includes a first switch S1 that controls the opening and closing of the vehicle power supply, the power module includes a first battery BT1 and a first fuse F1, and the voltage stabilizing module is a first voltage stabilizing diode ZD1; the negative electrode of the first battery BT1 is grounded, the positive electrode of the first battery BT1 is connected to the first end of the first fuse F1, the second end of the first fuse F1 is connected to the first end of the first switch S1, the second end of the first switch S1 is connected to the cathode of the first voltage stabilizing diode ZD1, and the anode of the first voltage stabilizing diode ZD1 is connected to the drainage module (such as Figure 2 wherein, the voltage stabilizing value of the first voltage stabilizing diode ZD1 is less than the voltage of the first battery BT1.

[0034] like Figure 2 As shown, the drainage module includes a first transistor Q1, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4; the first transistor Q1 is an NPN transistor, one end of the first resistor R1 is connected to the output end of the wheeling signal, the other end of the first resistor R1 is respectively connected to the collector of the first transistor Q1 and one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the anti-theft alarm module; one end of the third resistor R3 is connected to the base of the first transistor Q1, and the other end of the third resistor R3 is connected to the emitter of the first transistor; one end of the second resistor R2 is connected to the base of the first transistor Q1, and the other end of the second resistor R2 is connected to the anode of the first voltage regulator diode ZD1; wherein, the resistance of the third resistor R3 is greater than that of the second resistor R2, so as to ensure that the voltage across the third resistor R3 is greater than 0.7V when the first transistor Q1 is removed.

[0035] The control principle of this embodiment is as follows: when the first switch S1 is disconnected, the vehicle power supply is in the off state, the first transistor Q1 is at a low level under the action of the pull-down resistor third resistor R3, the first transistor Q1 is non-conductive, and the wheel signal generated by the motor is sent to the anti-theft alarm module (an electrical device with an anti-theft function) through the current limiting resistors first resistor R1 and fourth resistor R4. The resistance and power of the current limiting resistors first resistor R1 and fourth resistor R4 are adjusted according to the specific wheel signal load, so that the wheel signal driving capacity matches the load of the electrical components in the connected anti-theft alarm module. While satisfying the wheel signal driving load function, the resistance of the first resistor R1 and fourth resistor R4 is increased as much as possible, thereby reducing the power consumption of the first resistor R1 and fourth resistor R4, facilitating the selection of appropriate resistor packaging and reducing the electrical performance requirements of the first transistor Q1. When the first switch S1, which controls the vehicle power on and off, is connected, the vehicle power supply is in the on state, and the positive electrode voltage of the first battery BT1 is connected through the first voltage stabilizing diode ZD1 (the turn-on voltage of the control circuit). The first capacitor C1 is charged through the second current-limiting resistor R2 (the voltage of the first voltage-stabilizing diode ZD1 plus approximately 0.7V) and the second current-limiting resistor R2. When the voltage across the first capacitor C1 increases and meets the current conduction condition of the first transistor Q1, the voltage across the first capacitor C1 is limited to approximately 0.7V. The collector voltage of the first transistor Q1 is close to ground GND when it is turned on. Similarly, the motor rotation signal is sent to the collector of the first transistor Q1 through the first resistor R1. The first transistor Q1 is turned on to ground GND. The rotation signal in the circuit is a low-level ground signal from the collector of the first transistor Q1 through the fourth resistor R4 to the anti-theft alarm module, and the signal channel is closed.

[0036] In summary, in this embodiment, when switch S1 is disconnected and the first transistor Q1 is not conducting, the wheel movement signal generated by the motor is sent to the anti-theft alarm module for monitoring. When the first switch S1 is closed, the first transistor Q1 is turned on, and the wheel movement signal generated by the motor is grounded through the conducting first transistor Q1, closing the wheel movement signal channel. This prevents the anti-theft alarm module from being interfered with by the wheel movement signal after switch S1 is closed. When the entire vehicle is shut down, the first transistor Q1 is not conducting, and the wheel movement signal is transmitted to the anti-theft alarm module through the first resistor R1 and the fourth resistor R4, realizing the existing anti-theft function. This embodiment can prevent the wheel movement signal from interfering with peripheral circuits and wiring harnesses when the wheels are driving normally, thereby ensuring normal communication of the vehicle and ensuring personal and property safety.

[0037] Example 2

[0038] Different from the first embodiment, Figure 3As shown, the voltage stabilization module is a first DC-DC regulator. The first IN+ terminal of the first DC-DC regulator is connected to the second terminal of the first switch S1, and the first OUT+ terminal of the first DC-DC regulator is connected to the first terminal of the second resistor R2. Both the first IN- terminal and the first OUT- terminal of the first DC-DC regulator are grounded. Compared to the first Zener diode ZD1, the use of the first DC-DC regulator in this embodiment provides higher voltage regulation accuracy and better stability.

[0039] Example 3

[0040] like Figure 4 As shown, unlike the first embodiment, this embodiment further includes a control module, and the first end of the voltage stabilizing module is respectively connected to the second end of the power module and the first end of the switch module; the second end of the switch module is connected to one end of the control module, and the other end of the control module is connected to the first end of the drainage module.

[0041] Furthermore, the control module includes a first controller U1, a fifth resistor R5 and a sixth resistor R6; the second end of the switch module is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 and the first end of the power supply module are commonly grounded; the fourth pin of the controller U1 is connected to the second end of the fifth resistor R5, and the sixth pin of the controller U1 is connected to the first end of the second resistor in the drainage module.

[0042] Here, when the device S3 that controls the vehicle's power on and off is disconnected, the input voltage collected by the IO_4 pin of the first controller U1 is low, and the IO_6 pin of the first controller U1 outputs a low level. The pull-down resistor R3 acts as a low level on the first transistor Q1, rendering it non-conductive. The wheel rotation signal generated by the motor is transmitted to the anti-theft alarm module with anti-theft functionality via the current-limiting resistors R1 and R4. The resistance and power of the current-limiting resistors R1 and R4 are adjusted based on the specific wheel rotation signal load to ensure that the wheel rotation signal driving capability matches the load of the connected electrical components in the anti-theft alarm module. While ensuring that the wheel rotation signal driving load is met, the resistance of the current-limiting resistors R1 and R4 are maximized to reduce the power consumption of the first and fourth resistors R1 and R4, thereby facilitating the selection of an appropriate resistor package and lowering the electrical performance requirements for the first transistor Q1.

[0043] When the first switch S1 of the device that controls the power on and off of the entire vehicle is turned on, the input collection voltage of the IO_4 pin of the first controller U1 is high, and at the same time, the IO_6 pin of the first controller U1 outputs a high level to the current-limiting resistor second resistor R2; the second resistor R2 is connected to the base of the first transistor Q1, and the first transistor Q1 is turned on, and the collector voltage of the first transistor Q1 is pulled down; similarly, the motor rotation signal is sent to the collector of the first transistor Q1 through the first resistor R1, and is turned on to the ground GND through the first transistor Q1. The rotation signal in the circuit is a low-level ground signal from the collector of the first transistor Q1, the fourth resistor R4 to the electrical components of the anti-theft alarm module, and the signal channel is closed.

[0044] Through the analysis of the above working control principle, when the first switch S1 is closed, the rotation signal passes through the first resistor R1 and then the first transistor Q1 to the ground, and the rotation signal channel is closed; when the first switch S1 is opened, the rotation signal is transmitted to the anti-theft alarm module through the first resistor R1 and the fourth resistor R4, realizing the existing anti-theft function.

[0045] like Figure 5 To improve the previous waveform diagram, Figure 6 The waveform diagram of the vehicle anti-interference control device after using this embodiment; wherein, waveform 1 (in each figure, the lower waveform 1 is an enlarged view of the upper waveform 1) is the waveform diagram of the signal between the first resistor R1 and the fourth resistor R4, and waveform 2 (in each figure, the lower waveform 2 is an enlarged view of the upper waveform 2) is the waveform diagram of the communication signal in a certain position of the wiring harness that is interfered with by the wheel movement signal. Figure 5 As shown, before the improvement, the rotation signal is sent from the first resistor R1 to the anti-theft alarm module through the fourth resistor R4. Therefore, the rotation signal exists in the signal between the first resistor R1 and the fourth resistor R4; Figure 6 As shown in the waveform 1 after using the vehicle anti-interference control device of this embodiment, since the wheel movement signal is grounded through the first transistor Q1, the signal between the first resistor R1 and the fourth resistor R4 does not have the wheel movement signal. Figure 5 As shown in the figure, before the improvement, a certain wiring harness was interfered by the wheel signal and the waveform was relatively messy; Figure 6 As shown in the figure, after the improvement, a certain wiring harness is not disturbed by the rotation signal and the waveform is more regular.

[0046] All three of the above embodiments enable the wheel signal to open a signal channel in anti-theft mode and close it after the vehicle is powered on. Simply adding any of these three embodiments near the vehicle's motor significantly reduces interference caused by wheel signal transmission within the circuitry on vehicle communications. While maintaining the original vehicle's control and functional principles, this embodiment can reduce electromagnetic interference during vehicle operation, improve signal transmission security during driving, and thus enhance the vehicle's overall handling and safety.

[0047] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A vehicle anti-interference control device, characterized in that: It includes a power module, a switch module and a drainage module; the first end of the power module is grounded, the second end of the power module is connected to the first end of the switch module, and the second end of the switch module is connected to the first end of the drainage module; the second end of the drainage module is grounded, and the third end of the drainage module is connected to the output end of the rotation signal; wherein the output end of the rotation signal is also connected to the anti-theft alarm module that monitors the rotation signal; The switch module is used to control the on and off of the drainage module by closing and opening it; The diversion module is used to ground the rotation signal when it is turned on, and send the rotation signal to the anti-theft alarm module when it is turned off.

2. The vehicle anti-interference control device according to claim 1, characterized in that: It also includes a voltage stabilizing module, the second end of the switch module is connected to the first end of the voltage stabilizing module, and the second end of the voltage stabilizing module is connected to the drainage module.

3. The vehicle anti-interference control device according to claim 2, characterized in that: The current diversion module includes a first transistor, the output end of the rotation signal is connected to the collector of the first transistor, the voltage stabilizing module is connected to the base of the first transistor, and the emitter of the first transistor is grounded.

4. The vehicle anti-interference control device according to claim 3, characterized in that: The first transistor is an NPN transistor, the drainage module further includes a first resistor, a second resistor, a third resistor and a fourth resistor, one end of the first resistor is connected to the output end of the rotation signal, the other end of the first resistor is respectively connected to the collector of the first transistor and one end of the fourth resistor, and the other end of the fourth resistor is connected to the anti-theft alarm module; One end of the third resistor is connected to the base of the first transistor, and the other end of the third resistor is connected to the emitter of the first transistor; one end of the second resistor is connected to the base of the first transistor, and the other end of the second resistor is connected to the voltage stabilizing module.

5. The vehicle anti-interference control device according to claim 2, characterized in that: The voltage stabilizing module is a first voltage stabilizing diode or a first voltage stabilizer.

6. The vehicle anti-interference control device according to claim 1, characterized in that: It also includes a control module and a voltage stabilizing module, wherein the first end of the voltage stabilizing module is respectively connected to the second end of the power module and the first end of the switch module; the second end of the switch module is connected to one end of the control module, and the other end of the control module is connected to the first end of the drainage module.

7. The vehicle anti-interference control device according to claim 6, characterized in that: The control module includes a first controller, a fifth resistor and a sixth resistor; the second end of the switch module is connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the first end of the sixth resistor, and the second end of the sixth resistor is grounded together with the first end of the power module; the fourth end of the controller is connected to the second end of the fifth resistor, and the sixth end of the controller is connected to the first end of the drainage module.

8. The vehicle anti-interference control device according to any one of claims 1 to 7, characterized in that: The switch module is a first switch, the power module includes a first battery and a first fuse, the negative electrode of the first battery is grounded, the positive electrode of the first battery is connected to the first end of the first fuse, and the second end of the first fuse is connected to the first end of the first switch.

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