A sensor signal amplification device for intelligent gear shifting of an automobile

Abstract

The utility model discloses a sensor signal amplification device for automobile intelligent gear shifting. It includes signal amplification circuit, fault detection circuit and two analog switch circuit, signal amplification circuit is used for to the signal of gearbox input speed sensor, gearbox output speed sensor output is amplified and is corrected and handles, and is exported to gearbox controller, fault detection circuit is used for detecting whether signal amplification circuit has the fault, if the fault, then control two analog switch circuit conduction, make gearbox input speed sensor, gearbox output speed sensor output signal respectively through two analog switch direct sending to gearbox controller, if not the fault, then control two analog switch circuit is disconnected. The utility model amplifies the signal of gearbox input / output speed sensor output when the car is below 55km / h, makes the gearbox controller advance gear shifting time, improves the comfort of driving and riding, and saves the fuel.

Description

Technical Field

[0001] This utility model relates to the field of automotive gear shifting technology, and in particular to a sensor signal amplification device for intelligent gear shifting in automobiles. Background Technology

[0002] Automatic transmission vehicles are cars that use automatic transmissions for intelligent gear shifting. The transmission input speed sensor collects the speed of the transmission input shaft and sends it to the transmission controller, while the transmission output speed sensor collects the speed of the transmission output shaft and sends it to the transmission controller as well. The transmission controller can intelligently control gear shifting based on the input and output speeds, thus replacing the human's subjective judgment and shifting operations. However, when driving at speeds below 55 km / h, the automatic transmission controller's intelligent gear shifting timing is slightly delayed, resulting in a jerky feeling and increased fuel consumption. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a sensor signal amplification device for intelligent gear shifting in automobiles. When the automobile is traveling at a speed below 55 km / h, it amplifies the signals output by the transmission input speed sensor and the transmission output speed sensor, so that the transmission controller can advance the shifting timing, improve driving comfort, and achieve a certain degree of fuel saving.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a sensor signal amplification device for intelligent gear shifting in automobiles, comprising a signal amplification circuit, a fault detection circuit, and two analog switch circuits. The transmission input speed input terminal and transmission output speed input terminal of the signal amplification circuit are electrically connected to the output terminals of the transmission input speed sensor and transmission output speed sensor, respectively. The gear position signal input terminal of the signal amplification circuit is electrically connected to the gear position signal output terminal of the transmission controller. The transmission input speed output terminal and transmission output speed output terminal of the signal amplification circuit are electrically connected to the transmission controller, respectively. The first input terminal and second input terminal of the fault detection circuit are electrically connected to the output terminal of the transmission input speed sensor and the transmission input speed output terminal of the signal amplification circuit, respectively. The output terminal of the fault detection circuit is electrically connected to the control terminals of the two analog switch circuits. The input terminals of the two analog switch circuits are electrically connected to the output terminals of the transmission input speed sensor and transmission output speed sensor, respectively. The output terminals of the two analog switch circuits are electrically connected to the transmission controller, respectively.

[0006] In this scheme, the transmission input speed sensor on the automatic transmission vehicle sends the collected transmission input speed to the signal amplification circuit, and the transmission output speed sensor sends the collected transmission output speed to the signal amplification circuit. The transmission controller sends the vehicle's gear position signal to the signal amplification circuit. The signal amplification circuit determines the current vehicle speed based on the signal output by the transmission output speed sensor. When the vehicle speed is between 0-55 km / h, the signal amplification circuit determines the amplification factor range based on the current gear and the corresponding amplification factor based on the current vehicle speed. It then multiplies both the input and output transmission speeds by the corresponding amplification factor before outputting them to the transmission controller. When the vehicle speed exceeds 55 km / h, the signal amplification circuit multiplies both the input and output transmission speeds by 1 before outputting them to the transmission controller (i.e., the amplification factor is 1). When the vehicle speed is between 0-55 km / h, the input and output speeds of the transmission are amplified to a certain extent, so that the data obtained by the transmission controller is slightly larger than the actual values, thereby shifting gears earlier, improving driving comfort, and achieving a certain degree of fuel saving; when the vehicle speed exceeds 55 km / h, the data obtained by the transmission controller is consistent with the actual values, and gears are shifted according to the original shifting timing.

[0007] The fault detection circuit acquires the signals output by the transmission input speed sensor and the transmission input speed output terminal of the signal amplifier circuit. If the signal output by the transmission input speed sensor lasts for more than 5 cycles and the transmission input speed output terminal of the signal amplifier circuit has no output signal, the fault detection circuit determines that the signal amplifier circuit has malfunctioned. It then controls two analog switch circuits to conduct, and the signals output by the transmission input speed sensor and the transmission output speed sensor are sent to the transmission controller through the two analog switch circuits (i.e., the transmission controller directly reads the signals output by the transmission input speed sensor and the transmission output speed sensor). When the signal amplifier circuit is operating normally, the fault detection circuit controls the two analog switch circuits to disconnect.

[0008] Preferably, the signal amplification circuit includes a first power conversion module, an ML0002 chip U1, capacitors C1, C2, and C3. The input terminal of the first power conversion module is electrically connected to the vehicle power output terminal VCC. Pin 1 of the ML0002 chip U1 is electrically connected to the output terminal of the first power conversion module and one end of capacitor C1. Pin 16 of the ML0002 chip U1 and the other end of capacitor C1 are both grounded. Pin 2 of the ML0002 chip U1 is grounded through capacitor C2. Pin 3 of chip 1 is grounded through capacitor C3. Pin 2 of chip ML0002 is the gearbox input speed input terminal. Pin 3 of chip ML0002 is the gearbox output speed input terminal. Pin 4 of chip ML0002 is the gear position signal input terminal. Pin 8 of chip ML0002 is electrically connected to one end of resistor R6, and the other end of resistor R6 is the gearbox input speed output terminal. Pin 9 of chip ML0002 is electrically connected to one end of resistor R7, and the other end of resistor R7 is the gearbox output speed output terminal.

[0009] Preferably, the first power conversion module includes a first L78M05 chip U2, resistors R1 and R5, capacitors C4 and C5, electrolytic capacitor E1, and electrolytic capacitor E2. One end of resistor R5 is electrically connected to the vehicle power output terminal VCC, and the other end of resistor R5 is electrically connected to the positive terminal of electrolytic capacitor E2, one end of capacitor C4, one end of resistor R1, and pin 3 of the first L78M05 chip U2. The negative terminal of electrolytic capacitor E2, the other end of capacitor C4, and pin 2 of the first L78M05 chip are all grounded. Pin 1 of the first L78M05 chip U2 is electrically connected to the positive terminal of electrolytic capacitor E1, one end of capacitor C5, and the other end of resistor R1. The negative terminal of electrolytic capacitor E1 and the other end of capacitor C5 are both grounded. Pin 1 of the first L78M05 chip U2 is the output terminal of the first power conversion module.

[0010] Preferably, the fault detection circuit includes a second power conversion module, a TX-P1183 chip U3, resistors R13 and R15, capacitors C6, C12, and C14. One end of resistor R13 is the first input terminal of the fault detection circuit, and the other end of resistor R13 is electrically connected to one end of capacitor C12 and pin 7 of the TX-P1183 chip U3. One end of resistor R15 is the second input terminal of the fault detection circuit, and the other end of resistor R15 is electrically connected to one end of capacitor C14 and pin 6 of the TX-P1183 chip U3. The other ends of capacitors C12 and C14 are grounded. Pin 1 of the TX-P1183 chip U3 is electrically connected to the output terminal of the second power conversion module and one end of capacitor C6. Pin 8 of the TX-P1183 chip U3 and the other end of capacitor C6 are grounded. Pin 5 of the TX-P1183 chip U3 is the output terminal of the fault detection circuit.

[0011] Preferably, the two analog switch circuits are a first analog switch circuit and a second analog switch circuit, respectively. The first analog switch circuit includes a first analog switch chip U5, a resistor R14, a capacitor C7, and a capacitor C8. The second analog switch circuit includes a second analog switch chip U6, a resistor R16, and a capacitor C11. Both the first analog switch chip U5 and the second analog switch chip U6 are SN74LVC1G3157DBVR chips.

[0012] Pin 1 of the first analog switch chip U5 is the output terminal of the first analog switch circuit. Pin 2 of the first analog switch chip U5 is grounded. Pin 3 of the first analog switch chip U5 is the input terminal of the first analog switch circuit. Pin 6 of the first analog switch chip U5 is the control terminal of the first analog switch circuit. Pin 6 of the first analog switch chip U5 is electrically connected to one end of capacitor C7, and the other end of capacitor C7 is grounded. Pin 4 of the first analog switch chip U5 is electrically connected to one end of resistor R14. Pin 5 of the first analog switch chip U5 is electrically connected to one end of capacitor C8 and the output terminal of the second power conversion module. The other ends of resistor R14 and capacitor C8 are both grounded.

[0013] Pin 1 of the second analog switch chip U6 is the output terminal of the second analog switch circuit. Pin 2 of the second analog switch chip U6 is grounded. Pin 3 of the second analog switch chip U6 is the input terminal of the second analog switch circuit. Pin 6 of the second analog switch chip U6 is the control terminal of the second analog switch circuit. Pin 6 of the second analog switch chip U6 is electrically connected to one end of capacitor C11, and the other end of capacitor C11 is grounded. Pin 4 of the second analog switch chip U6 is electrically connected to one end of resistor R16. Pin 5 of the second analog switch chip U6 is electrically connected to one end of capacitor C16 and the output terminal of the second power conversion module. The other ends of resistor R16 and capacitor C16 are both grounded.

[0014] Preferably, the second power conversion module includes a second L78M05 chip U4, resistors R12 and R17, capacitors C9 and C10, electrolytic capacitor E3, and electrolytic capacitor E4. One end of resistor R17 is electrically connected to the vehicle power output terminal VCC, and the other end of resistor R17 is electrically connected to the positive terminal of electrolytic capacitor E4, one end of capacitor C9, one end of resistor R12, and pin 3 of the second L78M05 chip U4. The negative terminal of electrolytic capacitor E4, the other end of capacitor C9, and pin 2 of the second L78M05 chip U4 are all grounded. Pin 1 of the second L78M05 chip U4 is electrically connected to the positive terminal of electrolytic capacitor E3, one end of capacitor C10, and the other end of resistor R12. The negative terminal of electrolytic capacitor E3 and the other end of capacitor C10 are both grounded. Pin 1 of the second L78M05 chip U4 is the output terminal of the second power conversion module.

[0015] The beneficial effects of this utility model are: (1) When the car is traveling at a speed of less than 55 km / h, the signals output by the gearbox input speed sensor and the gearbox output speed sensor are amplified, thereby enabling the gearbox controller to advance the shifting time, improving driving comfort and achieving a certain degree of fuel saving. (2) When the signal amplification circuit malfunctions, the fault detection circuit can detect the fault and control the two analog switch circuits to conduct, so that the gearbox controller can directly read the signals output by the gearbox input speed sensor and the gearbox output speed sensor, eliminating safety hazards. Attached Figure Description

[0016] Figure 1 This is a circuit principle connection block diagram of the embodiment;

[0017] Figure 2 This is a circuit diagram of a signal amplification circuit;

[0018] Figure 3 This is a circuit diagram of a fault detection circuit and two analog switch circuits.

[0019] In the diagram: 1. Signal amplification circuit, 2. Fault detection circuit, 3. Analog switch circuit, 4. Gearbox input speed sensor, 5. Gearbox output speed sensor, 6. Gearbox controller. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0021] Example: This example describes a sensor signal amplification device for intelligent gear shifting in automobiles, such as... Figures 1 to 3 As shown, the circuit includes a signal amplification circuit 1, a fault detection circuit 2, and two analog switch circuits 3. The input and output speed terminals of the signal amplification circuit 1 are electrically connected to the output terminals of the transmission input speed sensor 4 and the transmission output speed sensor 5, respectively. The gear position signal input terminal of the signal amplification circuit 1 is electrically connected to the gear position signal output terminal of the transmission controller 6. The output and output speed terminals of the signal amplification circuit 1 are electrically connected to the transmission controller 6, respectively. The first and second input terminals of the fault detection circuit 2 are electrically connected to the output terminals of the transmission input speed sensor 4 and the signal amplification circuit 1, respectively. The output terminal of the fault detection circuit 2 is electrically connected to the control terminals of the two analog switch circuits 3. The input terminals of the two analog switch circuits 3 are electrically connected to the output terminals of the transmission input speed sensor 4 and the transmission output speed sensor 5, respectively. The output terminals of the two analog switch circuits 3 are electrically connected to the transmission controller 6, respectively.

[0022] The signal amplification circuit includes a first power conversion module, an ML0002 chip U1, capacitors C1, C2, and C3. The input terminal of the first power conversion module is electrically connected to the vehicle power output terminal VCC. Pin 1 of the ML0002 chip U1 is electrically connected to the output terminal of the first power conversion module and one end of capacitor C1. Pin 16 of the ML0002 chip U1 and the other end of capacitor C1 are grounded. Pin 2 of the ML0002 chip U1 is grounded through capacitor C2. Pin 3 of the ML0002 chip U1... Pin 2 of ML0002 chip U1 is the gearbox input speed input terminal, pin 3 of ML0002 chip U1 is the gearbox output speed input terminal, pin 4 of ML0002 chip U1 is the gear position signal input terminal, pin 8 of ML0002 chip U1 is electrically connected to one end of resistor R6, and the other end of resistor R6 is the gearbox input speed output terminal, and pin 9 of ML0002 chip U1 is electrically connected to one end of resistor R7, and the other end of resistor R7 is the gearbox output speed output terminal.

[0023] The first power conversion module includes a first L78M05 chip U2, resistors R1 and R5, capacitors C4 and C5, electrolytic capacitors E1 and E2. One end of resistor R5 is electrically connected to the automotive power output terminal VCC. The other end of resistor R5 is electrically connected to the positive terminal of electrolytic capacitor E2, one end of capacitor C4, one end of resistor R1, and pin 3 of the first L78M05 chip U2. The negative terminal of electrolytic capacitor E2, the other end of capacitor C4, and pin 2 of the first L78M05 chip are grounded. Pin 1 of the first L78M05 chip U2 is electrically connected to the positive terminal of electrolytic capacitor E1, one end of capacitor C5, and the other end of resistor R1. The negative terminal of electrolytic capacitor E1 and the other end of capacitor C5 are grounded. Pin 1 of the first L78M05 chip U2 is the output terminal of the first power conversion module. The output voltage of the automotive power output terminal VCC is +12V, and the output voltage of the first power conversion module is +5V.

[0024] The fault detection circuit includes a second power conversion module, a TX-P1183 chip U3, resistors R13 and R15, capacitors C6, C12, and C14. One end of resistor R13 is the first input terminal of the fault detection circuit, and the other end of resistor R13 is electrically connected to one end of capacitor C12 and pin 7 of the TX-P1183 chip U3. One end of resistor R15 is the second input terminal of the fault detection circuit, and the other end of resistor R15 is electrically connected to one end of capacitor C14 and pin 6 of the TX-P1183 chip U3. The other ends of capacitors C12 and C14 are grounded. Pin 1 of the TX-P1183 chip U3 is electrically connected to the output terminal of the second power conversion module and one end of capacitor C6. Pin 8 of the TX-P1183 chip U3 and the other end of capacitor C6 are grounded. Pin 5 of the TX-P1183 chip U3 is the output terminal of the fault detection circuit.

[0025] The two analog switch circuits are the first analog switch circuit and the second analog switch circuit. The first analog switch circuit includes the first analog switch chip U5, resistor R14, capacitor C7, and capacitor C8. The second analog switch circuit includes the second analog switch chip U6, resistor R16, and capacitor C11. Both the first analog switch chip U5 and the second analog switch chip U6 are SN74LVC1G3157DBVR chips.

[0026] Pin 1 of the first analog switch chip U5 is the output terminal of the first analog switch circuit. Pin 2 of the first analog switch chip U5 is grounded. Pin 3 of the first analog switch chip U5 is the input terminal of the first analog switch circuit. Pin 3 of the first analog switch chip U5 is electrically connected to the output terminal of the gearbox input speed sensor. Pin 6 of the first analog switch chip U5 is the control terminal of the first analog switch circuit. Pin 6 of the first analog switch chip U5 is electrically connected to one end of capacitor C7, and the other end of capacitor C7 is grounded. Pin 4 of the first analog switch chip U5 is electrically connected to one end of resistor R14. Pin 5 of the first analog switch chip U5 is electrically connected to one end of capacitor C8 and the output terminal of the second power conversion module. The other ends of resistor R14 and capacitor C8 are both grounded.

[0027] Pin 1 of the second analog switch chip U6 is the output terminal of the second analog switch circuit. Pin 2 of the second analog switch chip U6 is grounded. Pin 3 of the second analog switch chip U6 is the input terminal of the second analog switch circuit. Pin 3 of the second analog switch chip U6 is electrically connected to the output terminal of the gearbox output speed sensor. Pin 6 of the second analog switch chip U6 is the control terminal of the second analog switch circuit. Pin 6 of the second analog switch chip U6 is electrically connected to one end of capacitor C11, and the other end of capacitor C11 is grounded. Pin 4 of the second analog switch chip U6 is electrically connected to one end of resistor R16. Pin 5 of the second analog switch chip U6 is electrically connected to one end of capacitor C16 and the output terminal of the second power conversion module. The other ends of resistor R16 and capacitor C16 are both grounded.

[0028] The second power conversion module includes a second L78M05 chip U4, resistors R12 and R17, capacitors C9 and C10, electrolytic capacitor E3, and electrolytic capacitor E4. One end of resistor R17 is electrically connected to the vehicle's power output terminal VCC. The other end of resistor R17 is electrically connected to the positive terminal of electrolytic capacitor E4, one end of capacitor C9, one end of resistor R12, and pin 3 of the second L78M05 chip U4. The negative terminal of electrolytic capacitor E4, the other end of capacitor C9, and pin 2 of the second L78M05 chip U4 are all grounded. Pin 1 of the second L78M05 chip U4 is electrically connected to the positive terminal of electrolytic capacitor E3, one end of capacitor C10, and the other end of resistor R12. The negative terminal of electrolytic capacitor E3 and the other end of capacitor C10 are both grounded. Pin 1 of the second L78M05 chip U4 is the output terminal of the second power conversion module. The output voltage of the second power conversion module is +5V.

[0029] Figure 2 In the signal output, IN1 is the signal output from the gearbox input speed sensor, IN2 is the signal output from the gearbox output speed sensor, IN3 is the signal output from the gearbox controller's gear position signal output, out1 is the signal output from the gearbox input speed output terminal of the signal amplifier circuit, and out2 is the signal output from the gearbox output speed output terminal of the signal amplifier circuit. Figure 3 In the diagram, out11 is the signal output from the first analog switch circuit, and out12 is the signal output from the second analog switch circuit.

[0030] In this solution, the transmission input speed sensor on the automatic transmission vehicle sends the collected transmission input speed to the signal amplification circuit, the transmission output speed sensor on the automatic transmission vehicle sends the collected transmission output speed to the signal amplification circuit, the transmission controller sends the vehicle gear signal to the signal amplification circuit, and the signal amplification circuit determines the current vehicle speed based on the signal output by the transmission output speed sensor.

[0031] When the vehicle speed is between 0-55 km / h, the signal amplification circuit determines the amplification coefficient range based on the current gear and the corresponding amplification coefficient based on the current vehicle speed. The input and output speeds of the transmission are multiplied by the corresponding amplification coefficient before being output to the transmission controller. The higher the vehicle speed, the smaller the amplification coefficient. At 0 km / h, the amplification coefficient is the maximum value of the range, and at 55 km / h, it is the minimum value, which is 1, thus achieving a smooth transition. Different gears correspond to different amplification coefficient ranges; for example, gear 1 corresponds to the range [1, 1.1], gear 2 to [1, 1.2], and gear 3 to [1, 1.3].

[0032] When the vehicle speed exceeds 55km / h, the signal amplification circuit multiplies the input speed and output speed of the transmission by 1 before outputting them to the transmission controller (i.e., the amplification factor is 1).

[0033] The fault detection circuit acquires the signals output by the transmission input speed sensor and the transmission input speed output terminal of the signal amplification circuit. If the signal output by the transmission input speed sensor lasts for more than 5 cycles and the transmission input speed output terminal of the signal amplification circuit has no output signal (i.e., the signal output by the transmission input speed sensor lasts for more than 500ms and the transmission input speed output terminal of the signal amplification circuit has no output signal within these 500ms), the fault detection circuit determines that the signal amplification circuit has malfunctioned. It then controls the two analog switch circuits to conduct, and the signals output by the transmission input speed sensor and the transmission output speed sensor are sent to the transmission controller through the two analog switch circuits respectively (i.e., the transmission controller directly reads the signals output by the transmission input speed sensor and the transmission output speed sensor). When the signal amplification circuit is working normally, the fault detection circuit controls the two analog switch circuits to disconnect.

[0034] This design amplifies the input and output speeds of the transmission to a slightly higher degree when the vehicle is traveling at speeds below 55 km / h. This causes the transmission controller to obtain slightly higher values ​​than the actual values, resulting in earlier gear shifts, improved driving comfort, and some fuel savings. When the vehicle speed exceeds 55 km / h, the transmission controller obtains the same data as the actual values, and gear shifts are performed according to the original shift points. If the signal amplification circuit malfunctions, the fault detection circuit detects the fault and controls the two analog switch circuits to conduct. The transmission controller then directly reads the signals from the transmission input and output speed sensors, eliminating potential safety hazards.

Claims

1. A sensor signal amplification device for intelligent gear shifting in automobiles, characterized in that, The circuit includes a signal amplification circuit (1), a fault detection circuit (2), and two analog switch circuits (3). The input terminals of the transmission input speed and the output terminals of the transmission output speed of the signal amplification circuit (1) are electrically connected to the output terminals of the transmission input speed sensor (4) and the transmission output speed sensor (5), respectively. The input terminal of the signal amplification circuit (1) is electrically connected to the output terminal of the transmission controller (6). The output terminals of the signal amplification circuit (1) are electrically connected to the transmission controller (6), respectively. The first input terminal and the second input terminal of the fault detection circuit (2) are electrically connected to the output terminal of the transmission input speed sensor (4) and the output terminal of the signal amplification circuit (1), respectively. The output terminal of the fault detection circuit (2) is electrically connected to the control terminal of the two analog switch circuits (3). The input terminals of the two analog switch circuits (3) are electrically connected to the output terminals of the transmission input speed sensor (4) and the transmission output speed sensor (5), respectively. The output terminals of the two analog switch circuits (3) are electrically connected to the transmission controller (6).

2. The sensor signal amplification device for intelligent gear shifting in automobiles according to claim 1, characterized in that, The signal amplification circuit (1) includes a first power conversion module, an ML0002 chip U1, capacitors C1, C2, and C3. The input terminal of the first power conversion module is electrically connected to the vehicle power output terminal VCC. Pin 1 of the ML0002 chip U1 is electrically connected to the output terminal of the first power conversion module and one end of capacitor C1. Pin 16 of the ML0002 chip U1 and the other end of capacitor C1 are both grounded. Pin 2 of the ML0002 chip U1 is grounded through capacitor C2. Pin 3 of the ML0002 chip is grounded through capacitor C3. Pin 2 of the ML0002 chip U1 is the gearbox input speed input terminal. Pin 3 of the ML0002 chip U1 is the gearbox output speed input terminal. Pin 4 of the ML0002 chip U1 is the gear position signal input terminal. Pin 8 of the ML0002 chip U1 is electrically connected to one end of resistor R6, and the other end of resistor R6 is the gearbox input speed output terminal. Pin 9 of the ML0002 chip U1 is electrically connected to one end of resistor R7, and the other end of resistor R7 is the gearbox output speed output terminal.

3. The sensor signal amplification device for intelligent gear shifting in automobiles according to claim 2, characterized in that, The first power conversion module includes a first L78M05 chip U2, resistors R1 and R5, capacitors C4 and C5, electrolytic capacitor E1, and electrolytic capacitor E2. One end of resistor R5 is electrically connected to the vehicle power output terminal VCC. The other end of resistor R5 is electrically connected to the positive terminal of electrolytic capacitor E2, one end of capacitor C4, one end of resistor R1, and pin 3 of the first L78M05 chip U2. The negative terminal of electrolytic capacitor E2, the other end of capacitor C4, and pin 2 of the first L78M05 chip are all grounded. Pin 1 of the first L78M05 chip U2 is electrically connected to the positive terminal of electrolytic capacitor E1, one end of capacitor C5, and the other end of resistor R1. The negative terminal of electrolytic capacitor E1 and the other end of capacitor C5 are both grounded. Pin 1 of the first L78M05 chip U2 is the output terminal of the first power conversion module.

4. The sensor signal amplification device for intelligent gear shifting in automobiles according to claim 1, characterized in that, The fault detection circuit (2) includes a second power conversion module, a TX-P1183 chip U3, resistors R13 and R15, capacitors C6, C12, and C14. One end of resistor R13 is the first input terminal of the fault detection circuit, and the other end of resistor R13 is electrically connected to one end of capacitor C12 and pin 7 of the TX-P1183 chip U3. One end of resistor R15 is the second input terminal of the fault detection circuit, and the other end of resistor R15 is electrically connected to one end of capacitor C14 and pin 6 of the TX-P1183 chip U3. The other ends of capacitors C12 and C14 are grounded. Pin 1 of the TX-P1183 chip U3 is electrically connected to the output terminal of the second power conversion module and one end of capacitor C6. Pin 8 of the TX-P1183 chip U3 and the other end of capacitor C6 are grounded. Pin 5 of the TX-P1183 chip U3 is the output terminal of the fault detection circuit.

5. A sensor signal amplification device for intelligent gear shifting in automobiles according to claim 4, characterized in that, The two analog switch circuits (3) are the first analog switch circuit and the second analog switch circuit, respectively. The first analog switch circuit includes a first analog switch chip U5, a resistor R14, a capacitor C7, and a capacitor C8. The second analog switch circuit includes a second analog switch chip U6, a resistor R16, a capacitor C11, and a capacitor C16. Both the first analog switch chip U5 and the second analog switch chip U6 are SN74LVC1G3157DBVR chips. Pin 1 of the first analog switch chip U5 is the output terminal of the first analog switch circuit. Pin 2 of the first analog switch chip U5 is grounded. Pin 3 of the first analog switch chip U5 is the input terminal of the first analog switch circuit. Pin 6 of the first analog switch chip U5 is the control terminal of the first analog switch circuit. Pin 6 of the first analog switch chip U5 is electrically connected to one end of capacitor C7, and the other end of capacitor C7 is grounded. Pin 4 of the first analog switch chip U5 is electrically connected to one end of resistor R14. Pin 5 of the first analog switch chip U5 is electrically connected to one end of capacitor C8 and the output terminal of the second power conversion module. The other ends of resistor R14 and capacitor C8 are both grounded. Pin 1 of the second analog switch chip U6 is the output terminal of the second analog switch circuit. Pin 2 of the second analog switch chip U6 is grounded. Pin 3 of the second analog switch chip U6 is the input terminal of the second analog switch circuit. Pin 6 of the second analog switch chip U6 is the control terminal of the second analog switch circuit. Pin 6 of the second analog switch chip U6 is electrically connected to one end of capacitor C11, and the other end of capacitor C11 is grounded. Pin 4 of the second analog switch chip U6 is electrically connected to one end of resistor R16. Pin 5 of the second analog switch chip U6 is electrically connected to one end of capacitor C16 and the output terminal of the second power conversion module. The other ends of resistor R16 and capacitor C16 are both grounded.

6. The sensor signal amplification device for intelligent gear shifting in automobiles according to claim 4, characterized in that, The second power conversion module includes a second L78M05 chip U4, resistors R12 and R17, capacitors C9 and C10, electrolytic capacitor E3, and electrolytic capacitor E4. One end of resistor R17 is electrically connected to the vehicle power output terminal VCC. The other end of resistor R17 is electrically connected to the positive terminal of electrolytic capacitor E4, one end of capacitor C9, one end of resistor R12, and pin 3 of the second L78M05 chip U4. The negative terminal of electrolytic capacitor E4, the other end of capacitor C9, and pin 2 of the second L78M05 chip U4 are all grounded. Pin 1 of the second L78M05 chip U4 is electrically connected to the positive terminal of electrolytic capacitor E3, one end of capacitor C10, and the other end of resistor R12. The negative terminal of electrolytic capacitor E3 and the other end of capacitor C10 are both grounded. Pin 1 of the second L78M05 chip U4 is the output terminal of the second power conversion module.

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