Gear detection circuit

Abstract

The utility model discloses a gear detection circuit, including input module, ECU module and output module, wherein, the input module passes through hall switch detection handle pole's position, ECU module receives the gear information that input module transmits to the output module through control logic and transmits control signal, the output module adopts high side intelligent power pipe composition for output corresponding high low signal. The utility model discloses can accurately detect gear signal, and the reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of vehicle control technology, and in particular to a gear position detection circuit. Background Technology

[0002] Most existing gear position detection methods on the market use a lever to touch a micro switch to output a gear position signal. However, to ensure the reliability of the output signal, it is necessary to strictly control the distance and angle between the lever and the micro switch. In practice, due to the precision of the parts and subsequent wear, it is difficult to guarantee the accuracy and reliability of gear position detection. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a gear position detection circuit that can accurately detect gear position signals and has high reliability.

[0004] According to the present invention, a gear position detection circuit includes an input module, an ECU module, and an output module. The input module detects the position of the lever via a Hall switch. The ECU module receives the gear position information transmitted by the input module and transmits a control signal to the output module through control logic. The output module is composed of high-side intelligent power transistors and is used to output corresponding high and low signals.

[0005] Preferably, the input module of this utility model includes three Hall switches H1, H2, and H3. For Hall switch H1, pin 1 is connected to the positive terminal of a 5V power supply, pin 2 is connected to the negative terminal of the power supply, and pin 3 is connected to one end of resistor R3 to output the F_IN position signal. The other end of resistor R3 is connected to the positive terminal of the 5V power supply. For Hall switch H2, pin 1 is connected to the positive terminal of a 5V power supply, pin 2 is connected to the negative terminal of the power supply, and pin 3 is connected to one end of resistor R4 to output the R_IN position signal. The other end of resistor R4 is connected to the positive terminal of the 5V power supply. For Hall switch H3, pin 1 is connected to the positive terminal of a 5V power supply, pin 2 is connected to the negative terminal of the power supply, and pin 3 is connected to one end of resistor R5 to output the N_IN position signal. The other end of resistor R5 is connected to the positive terminal of the 5V power supply.

[0006] Preferably, the Hall effect sensor of this utility model is model DH43F.

[0007] Preferably, the ECU module of this utility model comprises a microcontroller U2 and a capacitor C5. Pin 2 of the microcontroller U2 is connected to the R_IN position signal of the input module, pin 3 is connected to the F_IN position signal of the input module, and pin 4 is connected to the N_IN position signal of the input module. Pin 1 of the microcontroller U2 is connected to the positive terminal of the 5V power supply, and pin 8 is connected to the negative terminal of the power supply. The capacitor C5 is connected in parallel between pins 1 and 8 of the microcontroller U2. Pins 5, 6, and 7 of the microcontroller U2 output R, F, and N signals to the output module, respectively.

[0008] Preferably, the microcontroller U2 of this utility model is a single-chip microcontroller PIC12F629.

[0009] Preferably, the output module of this utility model includes a high-side intelligent power transistor U3. Pins 1, 10, 11, 12, 15, 16, 19, and 20 of the high-side intelligent power transistor U3 are connected to the positive terminal VCC of the vehicle power supply. Pin 6 of the high-side intelligent power transistor U3 is connected to the negative terminal. Pin 3 of the high-side intelligent power transistor U3 is connected to the F signal. Pin 5 of the high-side intelligent power transistor U3 is connected to the N signal. Pin 7 of the high-side intelligent power transistor U3 is connected to the R signal. Pin 14 of the high-side intelligent power transistor U3 outputs the R_O signal. Pin 17 of the high-side intelligent power transistor U3 outputs the N_O signal. Pin 18 of the high-side intelligent power transistor U3 outputs the F_O signal.

[0010] Preferably, the high-side intelligent power transistor U3 of this utility model is model BTS724G.

[0011] Compared with existing technologies, this invention abandons the traditional method of using microswitches to detect gear position signals. Instead, it uses an input module to detect the position of the lever and transmits the gear position signal to the ECU module. After processing by the ECU module, a control signal is sent to the output module. The output module outputs corresponding high and low signals based on the received control signal, thereby detecting whether the gear position information is correct. This gear position detection circuit is simple, fast, and has high accuracy and reliability. Attached Figure Description

[0012] Figure 1 This is an electrical block diagram of a gear position detection circuit according to an embodiment of the present invention;

[0013] Figure 2 This is a circuit diagram of the input module of a gear detection circuit according to an embodiment of the present invention;

[0014] Figure 3 This is a circuit diagram of an ECU module for a gear position detection circuit according to an embodiment of the present invention;

[0015] Figure 4 This is a circuit diagram of the output module of the gear detection circuit according to an embodiment of the present invention; Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0017] The following is for reference. Figures 1 to 4 As shown, a gear position detection circuit according to an embodiment of the present invention includes an input module, an ECU module, and an output module. The input module detects the position of the lever using a Hall effect switch; the ECU module receives gear position information transmitted from the input module and transmits control signals to the output module through control logic; the output module is composed of high-side intelligent power transistors and is used to output the corresponding high / low signals required by the vehicle, thereby outputting the corresponding gear position signal. (Refer to...) Figure 1 As shown. Specifically, in this embodiment, the input module transmits the detected gear position signal to the ECU module. After performing control logic operations, the ECU module controls the output module to output the corresponding gear position signal to detect whether the circuit is operating normally.

[0018] refer to Figure 2 As shown, in some embodiments, the input module of this utility model includes three Hall switches H1, H2, and H3. In this embodiment, the Hall switches are DH43F model Hall switches. Pin 1 of Hall switch H1 is connected to the positive terminal of the 5V power supply, pin 2 is connected to the negative terminal of the power supply, and pin 3 is connected to one end of resistor R3 to output the F_IN position signal. The other end of resistor R3 is connected to the positive terminal of the 5V power supply. Pin 1 of Hall switch H2 is connected to the positive terminal of the 5V power supply, pin 2 is connected to the negative terminal of the power supply, and pin 3 is connected to one end of resistor R4 to output the R_IN position signal. The other end of resistor R4 is connected to the positive terminal of the 5V power supply. Pin 1 of Hall switch H3 is connected to the positive terminal of the 5V power supply, pin 2 is connected to the negative terminal of the power supply, and pin 3 is connected to one end of resistor R5 to output the N_IN position signal. The other end of resistor R5 is connected to the positive terminal of the 5V power supply.

[0019] refer to Figure 3 As shown, in some embodiments, the ECU module of this utility model includes a microcontroller U2 and a capacitor C5. In this embodiment, the microcontroller U2 is composed of a PIC12F629 microcontroller manufactured by Microchip. Pin 2 of the microcontroller U2 is connected to the R_IN position signal of the input module, pin 3 is connected to the F_IN position signal of the input module, and pin 4 is connected to the N_IN position signal of the input module. Pin 1 of the microcontroller U2 is connected to the positive terminal of the 5V power supply, and pin 8 is connected to the negative terminal of the power supply. The capacitor C5 is connected in parallel between pin 1 and pin 8 of the microcontroller U2. Pins 5, 6, and 7 of the microcontroller U2 output R, F, and N signals to the output module, respectively.

[0020] refer to Figure 4As shown, in some embodiments, the output module of this utility model includes a high-side intelligent power transistor U3. In this embodiment, the high-side intelligent power transistor U3 is a BTS724G manufactured by Infineon Technologies. Pins 1, 10, 11, 12, 15, 16, 19, and 20 of the high-side intelligent power transistor U3 are connected to the positive terminal VCC of the vehicle power supply. Pin 6 of the high-side intelligent power transistor U3 is connected to the negative terminal. Pin 3 of the high-side intelligent power transistor U3 is connected to the F signal. Pin 5 of the high-side intelligent power transistor U3 is connected to the N signal. Pin 7 of the high-side intelligent power transistor U3 is connected to the R signal. Pin 14 of the high-side intelligent power transistor U3 outputs the R_O signal. Pin 17 of the high-side intelligent power transistor U3 outputs the N_O signal. Pin 18 of the high-side intelligent power transistor U3 outputs the F_O signal.

[0021] During operation, the operator operates the lever. The input module detects the position of the magnet on the lever through a Hall switch and transmits the lever's gear position signal to the ECU module. After performing control logic calculations, the ECU module controls the output module to output the corresponding gear position signal, thereby detecting whether the circuit is operating normally.

[0022] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gear position detection circuit, characterized in that, include The input module detects the position of the handle lever via a Hall switch; The ECU module receives gear information transmitted by the input module and transmits control signals to the output module through control logic. The output module is composed of high-side intelligent power transistors and is used to output corresponding high and low signals.

2. The gear position detection circuit according to claim 1, characterized in that, The input module includes three Hall switches H1, H2, and H3. For Hall switch H1, pin 1 is connected to the positive terminal of a 5V power supply, pin 2 is connected to the negative terminal, and pin 3 is connected to one end of resistor R3, outputting the F_IN position signal. The other end of resistor R3 is connected to the positive terminal of the 5V power supply. For Hall switch H2, pin 1 is connected to the positive terminal of a 5V power supply, pin 2 is connected to the negative terminal, and pin 3 is connected to one end of resistor R4, outputting the R_IN position signal. The other end of resistor R4 is connected to the positive terminal of the 5V power supply. For Hall switch H3, pin 1 is connected to the positive terminal of a 5V power supply, pin 2 is connected to the negative terminal, and pin 3 is connected to one end of resistor R5, outputting the N_IN position signal. The other end of resistor R5 is connected to the positive terminal of the 5V power supply.

3. The gear position detection circuit according to claim 2, characterized in that, The Hall effect sensor is model DH43F.

4. The gear position detection circuit according to claim 1, characterized in that, The ECU module comprises a microcontroller U2 and a capacitor C5. Pin 2 of the microcontroller U2 is connected to the R_IN position signal of the input module, pin 3 is connected to the F_IN position signal of the input module, and pin 4 is connected to the N_IN position signal of the input module. Pin 1 of the microcontroller U2 is connected to the positive terminal of the 5V power supply, and pin 8 is connected to the negative terminal of the power supply. The capacitor C5 is connected in parallel between pins 1 and 8 of the microcontroller U2. Pins 5, 6, and 7 of the microcontroller U2 output R, F, and N signals to the output module, respectively.

5. The gear position detection circuit according to claim 4, characterized in that, The microcontroller U2 is a PIC12F629 microcontroller.

6. A gear position detection circuit according to any one of claims 1-5, characterized in that, The output module includes a high-side intelligent power transistor U3. Pins 1, 10, 11, 12, 15, 16, 19, and 20 of the high-side intelligent power transistor U3 are connected to the positive terminal VCC of the vehicle power supply. Pin 6 of the high-side intelligent power transistor U3 is connected to the negative terminal. Pin 3 of the high-side intelligent power transistor U3 is connected to the F signal. Pin 5 of the high-side intelligent power transistor U3 is connected to the N signal. Pin 7 of the high-side intelligent power transistor U3 is connected to the R signal. Pin 14 of the high-side intelligent power transistor U3 outputs the R_O signal. Pin 17 of the high-side intelligent power transistor U3 outputs the N_O signal. Pin 18 of the high-side intelligent power transistor U3 outputs the F_O signal.

7. The gear position detection circuit according to claim 6, characterized in that, The high-side intelligent power transistor U3 is model BTS724G.

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