Reverse transmission force value signal automatic generation circuit

Abstract

The utility model provides a reverse transmission force value signal automatic generation circuit. The reverse transmission force value signal automatic generation circuit comprises a microcontroller, a digital-to-analog conversion module, a voltage reduction module, a first amplification module, a second amplification module and a voltage stabilization filtering module. The output end of the microcontroller is connected to the signal input end of the digital-to-analog conversion module, the output end of the analog-to-digital conversion module is connected to the input end of the step-down module, the first output end of the step-down module is connected to the input end of the first amplification module, and the second output end of the step-down module is connected to the input end of the second amplification module. The output end of the first amplification module and the output end of the second amplification module are connected to the first input end and the second input end of the voltage stabilization filtering module respectively, the first output end of the voltage stabilization filtering module outputs a reverse transmission force value signal S-, and the second output end of the voltage stabilization filtering module outputs a reverse transmission force value signal S +. The reverse transmission force value signal automatic generation circuit solves the problem of how to automatically generate a reverse transmission force signal in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of signal amplification and sensors, and in particular to a reverse transmission force value signal automatic generation circuit. Background Art

[0002] In the prior art, general sensors require a sensor front-end signal processing circuit, which includes: a filtering module, a signal conditioning module and a voltage stabilizing module. The input end of the filtering module is connected to the output end of the sensor, the output end of the filtering module is connected to the input end of the signal conditioning module, the output end of the signal conditioning module is connected to the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is connected to the detection controller, and the signal conditioning module conditions the sensor input signal.

[0003] Although it is possible to condition the sensor collected signal, the reverse transmission force value signal automatic generation circuit still has the disadvantage that since the collected signal needs to be added with the automatically generated reverse transmission force signal to form a mixed signal, the mixed signal can be recognized by the detection controller. Therefore, how to automatically generate the reverse transmission force signal is an urgent problem to be solved in this application. Utility Model Content

[0004] The utility model aims to provide a reverse transmission force value signal automatic generation circuit, which solves the problem of how to automatically generate a reverse transmission force signal in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the utility model provides a reverse transmission force value signal automatic generation circuit, including: a microcontroller, a digital-to-analog conversion module, a step-down module, a first amplification module, a second amplification module and a voltage stabilizing filter module; the output end of the microcontroller is connected to the signal input end of the digital-to-analog conversion module, the output end of the analog-to-digital conversion module is connected to the input end of the step-down module, the first output end of the step-down module is connected to the input end of the first amplification module, the second output end of the step-down module is connected to the input end of the second amplification module, the output end of the first amplification module and the output end of the second amplification module are respectively connected to the first input end and the second input end of the voltage stabilizing filter module, the first output end of the voltage stabilizing filter module outputs a reverse transmission force value signal S-, and the second output end of the voltage stabilizing filter module outputs a reverse transmission force value signal S+.

[0006] Preferably, the reverse transmission force value signal automatic generation circuit also includes: an amplification feedback module, the input end of the amplification feedback module is connected to the second output end of the step-down module, and the output end of the amplification feedback module is connected to the feedback end of the digital-to-analog conversion module.

[0007] Preferably, a resistive grounding terminal is installed between the digital-to-analog conversion module and the microcontroller.

[0008] Preferably, the step-down module includes: resistor R6, resistor R7, resistor R8 and resistor R9, the first end of resistor R6 is the input end of the step-down module, the second end of resistor R6 is connected to one end of resistor R9, the other end of resistor R9 is connected to one end of resistor R7, the other end of resistor R7 is connected to one end of resistor R8, the other end of resistor R8 is grounded, the connection point between resistor R7 and resistor R8 is the first output end of the step-down module, and the connection point between resistor R6 and resistor R9 is the second output end of the step-down module.

[0009] Preferably, the amplification feedback module includes: an amplifier U2C, a capacitor C8 and a capacitor C9, the output end of the digital-to-analog conversion module is connected to the anode of the capacitor C9, the cathode of the capacitor C9 is grounded, and the cathode of the capacitor C9 is connected to the ground end of the amplifier U2C, the amplifier U2C is connected to the anode of the capacitor C8, the cathode of the capacitor C8 is grounded, the second output end of the step-down module is connected to the same-direction input end of the amplifier U2C, the reverse input end of the amplifier U2C is connected to the output end of the amplifier U2C, the output end of the amplifier U2C is connected to the feedback end of the analog-to-digital conversion module, and the power supply end of the amplifier U2C is connected to the DC power supply VCCA.

[0010] Preferably, the first amplifying module includes: a resistor R3, a resistor R5, a capacitor C6 and an amplifier U2A, one end of the resistor R3 is the output end of the first amplifying module, the other end of the resistor R3 is connected to the negative electrode of the capacitor C6, the first end of the resistor R5 and the output end of the reverse amplifier U2A, the positive electrode of the capacitor C6 and the second end of the resistor R5 are both connected to the reverse input end of the amplifier U2A, and the same-direction input end of the reverse input end of the amplifier U2A is connected to the input end of the second amplifying module; the second amplifying module includes: a resistor R4, a capacitor C7 and an amplifier U2B, the first end of the resistor R4 is connected to the output end of the first amplifying module, the second end of the resistor R4 is the output end of the second amplifying module, the second end of the resistor R4 is connected to the output end and the reverse input end of the amplifier U2B, the same-direction input end of the amplifier U2B is the input end of the second amplifying module, the power supply end of the amplifier U2B is connected to the DC power supply VCCA and the positive electrode of the capacitor C7, and the negative electrode of the capacitor C7 is grounded.

[0011] Preferably, the voltage stabilizing and filtering module includes: capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, resistor R1 and resistor R2, the positive electrode of capacitor C1 is connected to the positive electrode of capacitor C3, the positive electrode of capacitor C3 is the second output end of the voltage stabilizing and filtering module, the negative electrode of capacitor C3 is grounded, and the negative electrode of capacitor C3 is connected to the negative electrode of capacitor C5, the positive electrode of capacitor C5 is connected to the first end of resistor R2, the second end of resistor R2 is connected to the positive electrode of capacitor C3, the first end of resistor R2 is the first input end of the voltage stabilizing and filtering module, the negative electrode of capacitor C1 is connected to the positive electrode of capacitor C2, the negative electrode of capacitor C2 is grounded, the negative electrode of capacitor C2 is connected to the negative electrode of capacitor C4, the negative electrode of capacitor C1 is the first output end of the voltage stabilizing and filtering module, the connection point between capacitor C1 and capacitor C2 is connected to one end of resistor R1, the other end of resistor R1 is connected to the positive electrode of capacitor C4, and the positive electrode of capacitor C4 is the first input end of the voltage stabilizing and filtering module.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] When working, the output end of the microcontroller outputs a pulse signal, that is, a digital signal. The digital signal output by the microcontroller is transmitted to the input end of the digital-to-analog conversion module. The digital-to-analog conversion module converts the digital signal into an analog signal. The output end of the digital-to-analog conversion module outputs an analog signal. After the analog signal is output, it is stepped down by the step-down module. The step-down module implements two step-downs. After the first step-down, it is output from the first output end of the step-down module, and after the second step-down, it is output from the second output end of the step-down module, so that the voltage output from the first output end of the step-down module and the second output end of the step-down module form a pressure difference, that is, the reverse transmission force value signal S- and the reverse transmission force value signal S+ form a pressure difference, thereby realizing the automatic generation of the reverse transmission force value signal S- and the reverse transmission force value signal S+.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A circuit diagram of a digital-to-analog conversion module, a voltage reduction module, a first amplification module, a second amplification module and a voltage stabilization and filtering module in a circuit for automatically generating a reverse transmission force value signal.

[0016] Figure 2 The circuit diagram of the microcontroller. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0018] like Figure 1 as well as Figure 2 As shown, the utility model provides a reverse transmission force value signal automatic generation circuit, including: a microcontroller, a digital-to-analog conversion module, a step-down module, a first amplification module, a second amplification module and a voltage stabilizing filter module; the output end of the microcontroller is connected to the signal input end of the digital-to-analog conversion module, the output end of the analog-to-digital conversion module is connected to the input end of the step-down module, the first output end of the step-down module is connected to the input end of the first amplification module, the second output end of the step-down module is connected to the input end of the second amplification module, the output end of the first amplification module and the output end of the second amplification module are respectively connected to the first input end and the second input end of the voltage stabilizing filter module, the first output end of the voltage stabilizing filter module outputs a reverse transmission force value signal S-, and the second output end of the voltage stabilizing filter module outputs a reverse transmission force value signal S+.

[0019] The reverse transmission force value signal automatic generation circuit also includes: an amplification feedback module, the input end of the amplification feedback module is connected to the second output end of the buck module, and the output end of the amplification feedback module is connected to the feedback end of the digital-to-analog conversion module. The amplification feedback module feeds back the voltage of the second output end of the buck module to the feedback end of the digital-to-analog conversion module, so that the digital-to-analog conversion module can detect its own output voltage when it is working.

[0020] A resistive grounding terminal is installed between the digital-to-analog conversion module and the microcontroller, which realizes the connection between the digital-to-analog conversion module and the microcontroller, and the resistive grounding terminal also has the function of stabilizing the voltage.

[0021] The step-down module includes: resistor R6, resistor R7, resistor R8 and resistor R9, the first end of resistor R6 is the input end of the step-down module, the second end of resistor R6 is connected to one end of resistor R9, the other end of resistor R9 is connected to one end of resistor R7, the other end of resistor R7 is connected to one end of resistor R8, the other end of resistor R8 is grounded, the connection point between resistor R7 and resistor R8 is the first output end of the step-down module, and the connection point between resistor R6 and resistor R9 is the second output end of the step-down module. Resistors R6, R7, R8 and R9 realize the step-down function, two-stage step-down, the first stage step-down is resistor R6, and the second stage step-down is resistor R9 and resistor R8, so that a pressure difference is formed between the first output end and the second output end of the step-down module, and the corresponding reverse transmission force value signal S- and reverse transmission force value signal S+ also have corresponding pressure differences.

[0022] The amplification feedback module includes: an amplifier U2C, a capacitor C8 and a capacitor C9. The output end of the digital-to-analog conversion module is connected to the anode of the capacitor C9, the cathode of the capacitor C9 is grounded, and the cathode of the capacitor C9 is connected to the ground end of the amplifier U2C. The amplifier U2C is connected to the anode of the capacitor C8, and the cathode of the capacitor C8 is grounded. The second output end of the step-down module is connected to the same-direction input end of the amplifier U2C, the reverse input end of the amplifier U2C is connected to the output end of the amplifier U2C, the output end of the amplifier U2C is connected to the feedback end of the analog-to-digital conversion module, and the power supply end of the amplifier U2C is connected to the DC power supply VCCA.

[0023] The first amplification module includes: a resistor R3, a resistor R5, a capacitor C6 and an amplifier U2A, one end of the resistor R3 is the output end of the first amplification module, the other end of the resistor R3 is connected to the negative electrode of the capacitor C6, the first end of the resistor R5 and the output end of the reverse amplifier U2A, the positive electrode of the capacitor C6 and the second end of the resistor R5 are both connected to the reverse input end of the amplifier U2A, and the same-direction input end of the reverse input end of the amplifier U2A is connected to the input end of the second amplification module; the second amplification module includes: a resistor R4, a capacitor C7 and an amplifier U2B, the first end of the resistor R4 is connected to the output end of the first amplification module, the second end of the resistor R4 is the output end of the second amplification module, the second end of the resistor R4 is connected to the output end and the reverse input end of the amplifier U2B, the same-direction input end of the amplifier U2B is the input end of the second amplification module, the power supply end of the amplifier U2B is connected to the DC power supply VCCA and the positive electrode of the capacitor C7, and the negative electrode of the capacitor C7 is grounded. Resistor R8 stabilizes the same-direction input end of the amplifier U2B and the same-direction input end of the amplifier U2A. The first output end of the step-down module is connected to the reverse input end of the amplifier U2A, and the second output end of the step-down module is connected to the same-direction input end of the amplifier U2A, so that the output voltage of the output end of the first amplifier module and the output voltage of the output end of the second amplifier module are opposite, thereby forming a phase difference between the analog signals output by the reverse transmission force value signal S- and the reverse transmission force value signal S6+.

[0024] The voltage stabilizing and filtering module includes: capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, resistor R1 and resistor R2, the positive electrode of capacitor C1 is connected to the positive electrode of capacitor C3, the positive electrode of capacitor C3 is the second output end of the voltage stabilizing and filtering module, the negative electrode of capacitor C3 is grounded, and the negative electrode of capacitor C3 is connected to the negative electrode of capacitor C5, the positive electrode of capacitor C5 is connected to the first end of resistor R2, the second end of resistor R2 is connected to the positive electrode of capacitor C3, the first end of resistor R2 is the first input end of the voltage stabilizing and filtering module, the negative electrode of capacitor C1 is connected to the positive electrode of capacitor C2, the negative electrode of capacitor C2 is grounded, the negative electrode of capacitor C2 is connected to the negative electrode of capacitor C4, the negative electrode of capacitor C1 is the first output end of the voltage stabilizing and filtering module, the connection point between capacitor C1 and capacitor C2 is connected to one end of resistor R1, the other end of resistor R1 is connected to the positive electrode of capacitor C4, and the positive electrode of capacitor C4 is the first input end of the voltage stabilizing and filtering module. Capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, resistor R1 and resistor R2 realize voltage stabilization filtering, so that the output reverse transmission force value signal S- and reverse transmission force value signal S+ can be stable.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A reverse transmission force value signal automatic generation circuit, characterized in that: include: A microcontroller, a digital-to-analog conversion module, a voltage reduction module, a first amplification module, a second amplification module, and a voltage stabilization and filtering module; The output end of the microcontroller is connected to the signal input end of the digital-to-analog conversion module, the output end of the analog-to-digital conversion module is connected to the input end of the step-down module, the first output end of the step-down module is connected to the input end of the first amplification module, the second output end of the step-down module is connected to the input end of the second amplification module, the output end of the first amplification module and the output end of the second amplification module are respectively connected to the first input end and the second input end of the voltage stabilizing and filtering module, the first output end of the voltage stabilizing and filtering module outputs a reverse transmission force value signal S-, and the second output end of the voltage stabilizing and filtering module outputs a reverse transmission force value signal S+.

2. The reverse transmission force value signal automatic generation circuit according to claim 1, characterized in that: Also includes: The amplifying feedback module has an input end connected to the second output end of the step-down module, and an output end of the amplifying feedback module connected to the feedback end of the digital-to-analog conversion module.

3. The reverse transmission force value signal automatic generation circuit according to claim 1 or 2, characterized in that: A resistive grounding terminal is installed between the digital-to-analog conversion module and the microcontroller.

4. The reverse transmission force value signal automatic generation circuit according to claim 3, characterized in that: The step-down module includes: resistor R6, resistor R7, resistor R8 and resistor R9, the first end of resistor R6 is the input end of the step-down module, the second end of resistor R6 is connected to one end of resistor R9, the other end of resistor R9 is connected to one end of resistor R7, the other end of resistor R7 is connected to one end of resistor R8, the other end of resistor R8 is grounded, the connection point between resistor R7 and resistor R8 is the first output end of the step-down module, and the connection point between resistor R6 and resistor R9 is the second output end of the step-down module.

5. The reverse transmission force value signal automatic generation circuit according to claim 4, characterized in that: The amplification feedback module includes: an amplifier U2C, a capacitor C8 and a capacitor C9. The output end of the digital-to-analog conversion module is connected to the anode of the capacitor C9, the cathode of the capacitor C9 is grounded, and the cathode of the capacitor C9 is connected to the ground end of the amplifier U2C. The amplifier U2C is connected to the anode of the capacitor C8, and the cathode of the capacitor C8 is grounded. The second output end of the step-down module is connected to the same-direction input end of the amplifier U2C, the reverse input end of the amplifier U2C is connected to the output end of the amplifier U2C, the output end of the amplifier U2C is connected to the feedback end of the analog-to-digital conversion module, and the power supply end of the amplifier U2C is connected to the DC power supply VCCA.

6. The reverse transmission force value signal automatic generation circuit according to claim 5, characterized in that: The first amplification module includes: a resistor R3, a resistor R5, a capacitor C6 and an amplifier U2A, one end of the resistor R3 is the output end of the first amplification module, the other end of the resistor R3 is connected to the negative electrode of the capacitor C6, the first end of the resistor R5 and the output end of the reverse amplifier U2A, the positive electrode of the capacitor C6 and the second end of the resistor R5 are both connected to the reverse input end of the amplifier U2A, and the same-direction input end of the reverse input end of the amplifier U2A is connected to the input end of the second amplification module; The second amplifying module includes: a resistor R4, a capacitor C7 and an amplifier U2B, the first end of the resistor R4 is connected to the output end of the first amplifying module, the second end of the resistor R4 is the output end of the second amplifying module, the second end of the resistor R4 is connected to the output end and the reverse input end of the amplifier U2B, the same-direction input end of the amplifier U2B is the input end of the second amplifying module, the power supply end of the amplifier U2B is connected to the DC power supply VCCA and the positive electrode of the capacitor C7, and the negative electrode of the capacitor C7 is grounded.

7. The reverse transmission force value signal automatic generation circuit according to claim 6, characterized in that: The voltage stabilizing and filtering module includes: capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, resistor R1 and resistor R2, the positive electrode of capacitor C1 is connected to the positive electrode of capacitor C3, the positive electrode of capacitor C3 is the second output end of the voltage stabilizing and filtering module, the negative electrode of capacitor C3 is grounded, and the negative electrode of capacitor C3 is connected to the negative electrode of capacitor C5, the positive electrode of capacitor C5 is connected to the first end of resistor R2, the second end of resistor R2 is connected to the positive electrode of capacitor C3, the first end of resistor R2 is the first input end of the voltage stabilizing and filtering module, the negative electrode of capacitor C1 is connected to the positive electrode of capacitor C2, the negative electrode of capacitor C2 is grounded, the negative electrode of capacitor C2 is connected to the negative electrode of capacitor C4, the negative electrode of capacitor C1 is the first output end of the voltage stabilizing and filtering module, the connection point between capacitor C1 and capacitor C2 is connected to one end of resistor R1, the other end of resistor R1 is connected to the positive electrode of capacitor C4, and the positive electrode of capacitor C4 is the first input end of the voltage stabilizing and filtering module.

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