Control system sensor signal collecting and processing device

Abstract

The utility model provides a control system sensor signal collecting and processing device which comprises a signal input module, a first signal selection module, a second signal selection module, a first voltage comparison module, a second voltage comparison module, a third voltage comparison module, a first direct-current voltage conversion circuit, a second direct-current voltage conversion circuit and a communication module. The signal input module is connected with the first signal selection module and the second signal selection module. The first voltage comparison module is simultaneously connected with the signal input module and the second signal selection module; the second voltage comparison module is simultaneously connected with the signal input module and the second signal selection module; the third voltage comparison module is simultaneously connected with the signal input module and the first signal selection module; the communication module is simultaneously connected with the first direct-current voltage conversion circuit and the second direct-current voltage conversion circuit and is used for receiving data transmitted by each sensor; the signal input module can be connected with different types of sensors.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of control system signal acquisition, in particular to a control system sensor signal acquisition and processing device. BACKGROUND

[0002] With the development of industrial technology and the continuous improvement of automation level, the use requirements for sensors on the system are increasingly strict. The sensors are mainly used for monitoring the design running state, such as temperature, pressure and the like, to ensure the normal operation of the unit, optimize product performance and fault monitoring and the like.

[0003] The original product uses a PLC analog quantity expansion module to collect signals, installs the PLC expansion module in the control electric box, installs the sensors outside the electric box, disperses the sensors at key positions of the unit, and directly transmits analog quantity signals to the inside of the electric box through cables, so that the cables are long and the number of cables is large.

[0004] The current system uses a pressure, temperature and the like analog quantity signal acquisition mode to collect data of analog signals outside the electric box through a PLC analog quantity expansion module in the electric box. The transmission form of the analog signals is relatively complex, and each sensor needs to be separately connected with a cable to the control cabinet. Especially for a cold storage, a factory building and the like with a large floor area, the traditional sensor connection leads to long lines and high cost. If the number of analog quantity sensors to be collected is large, the cost problem is more prominent.

[0005] The current acquisition module can only process a single signal, for example, can only process temperature signals and cannot process pressure signals and the like.

[0006] The analog quantity signal transmission distance of each sensor is long, the signal is affected by the line resistance, the signal is attenuated or distorted in the signal transmission process, and the precision of signal acquisition is affected. CONTENT OF THE NEW UTILIT

[0007] To achieve the above purpose, the application provides a control system sensor signal acquisition and processing device, which comprises:

[0008] The signal input module, the first signal selection module, the second signal selection module, the first voltage comparison module, the second voltage comparison module, the third voltage comparison module, the first direct current voltage conversion circuit, the second direct current voltage conversion circuit and the communication module are connected; the signal input module is connected with the first signal selection module and the second signal selection module; the first voltage comparison module is connected with the signal input module and the second signal selection module; the second voltage comparison module is connected with the signal input module and the second signal selection module; the third voltage comparison module is connected with the signal input module and the first signal selection module; the communication module is connected with the first direct current voltage conversion circuit and the second direct current voltage conversion circuit, and the communication module is used for receiving data transmitted by each sensor; wherein the signal input module can be connected with different types of sensors.

[0009] According to the technical scheme, the analog signal is converted into a digital signal, and the signal transmission is realized through the RS485 communication mode. For any number of sensors, only the first signal acquisition module is connected with the controller in the electric box through the power line and the RS485 communication line. Other modules can be sequentially connected behind the first module. For large and medium-sized units and a large number of sensors, the number of cables can be effectively reduced, the line layout can be optimized, the hardware cost can be reduced, the signal anti-interference capability can be enhanced, and the on-site use requirements of various units can be met.

[0010] Specifically, the signal input module comprises: an input terminal JTG3, a diode D20, a diode D21 and a diode D22; the 2 end of the input terminal JTG3 is connected with the 1 end of the diode D21, the 3 end is connected with the 2 end of the diode D22, and the 4 end is connected with the 1 end of the diode D20; the 2 end of the diode D21 is connected with the 1 end of the diode D22 and grounded; and the 2 end of the diode D20 is grounded.

[0011] Specifically, the first signal selection module comprises: a relay U35, a triode Q67, a capacitor C90, a capacitor C98, a resistor R89, a resistor R90, a diode D18 and a MOS tube Q55; the port 5 of the relay U35 is connected with the capacitor C90 and the capacitor C98; the port 1 of the relay U35 is connected with the drain of the MOS tube Q55 and the negative electrode of the diode D18; the port 3 of the relay U35 is connected with the port 3 of the terminal JTG3; the source of the MOS tube Q55 is connected with one end of the resistor R90, and the gate is connected with the other end of the resistor R90 and the collector of the triode Q67; one end of the resistor R89 is connected with the base of the triode Q67, and the other end is connected with the emitter of the triode Q67.

[0012] Specifically, the second signal selection module comprises: a relay U30, a capacitor C88, a resistor R85, a resistor R86, a resistor R87, a MOS tube Q64, a resistor D17 and a triode Q65; one end of the resistor R87 is connected to the port 6 of the relay U30; the other end of the resistor R87 is connected to the capacitor C88; the port 1 of the relay U30 is connected to the drain of the MOS tube Q64 and the negative electrode of the diode D17; one end of the resistor R86 is connected to the source of the MOS tube Q64; the gate of the MOS tube Q64 is connected to the other end of the resistor R86 and the collector of the triode Q65; one end of the resistor R85 is connected to the base of the triode Q65, and the other end is connected to the emitter of the triode Q65.

[0013] Specifically, the first voltage comparison module comprises: an amplifier U25, a capacitor C84, a capacitor C80, a capacitor C67, a capacitor C46, a resistor R83, a resistor R76, a resistor R84, a resistor R82, a resistor R81, a resistor R77, a resistor R79, a resistor R80 and a reference voltage chip; the non-inverting input terminal of the amplifier U25 is connected to one end of the resistor R77 and one end of the resistor R82, and the inverting input terminal is connected to one end of the resistor R81 and one end of the resistor R79; the other end of the resistor R79 is connected to the output terminal of the amplifier U25 and one end of the resistor R80; the other end of the resistor R80 is connected to the capacitor C67; the port 1 of the reference voltage chip is connected to the capacitor C46, the port 2 is connected to one end of the resistor R83 and one end of the resistor R84, the positive electrode of the capacitor C84 and the capacitor C80, and the port 3 is connected to the negative electrode of the capacitor C84 and the other end of the capacitor C80; the other end of the resistor R81 is connected to the other end of the resistor R82 and one end of the resistor R76; the other end of the resistor R84 is connected to the other end of the resistor R82.

[0014] Specifically, the second voltage comparison module comprises: an amplifier U28, a resistor R533, a resistor R532, a resistor R75, a resistor R101, a resistor R74, a resistor R72, a resistor R71, a resistor R70 and a capacitor C76; the non-inverting input terminal of the amplifier U28 is connected to one end of the resistor R72 and one end of the resistor R101, and the inverting input terminal is connected to one end of the resistor R74 and one end of the resistor R71; the output terminal of the amplifier U28 is connected to the other end of the resistor R71 and one end of the resistor R70; the other end of the resistor R70 is connected to the capacitor C76; one end of the resistor R533 is connected to one end of the resistor R532 and the other end of the resistor R74, and the other end of the resistor R533 is connected to the other end of the resistor R101 through the resistor R75.

[0015] Specifically, the third voltage comparison module comprises: an amplifier U33, a capacitor C75, a resistor R69, a resistor R93, a resistor R94, a resistor R95, a resistor R67, a resistor R66, a capacitor C71 and a capacitor C72; the non-inverting input terminal of the amplifier U33 is connected to one end of the resistor R67 and one end of the resistor R94, the inverting input terminal is connected to one end of the resistor R95 and one end of the resistor R66, the output terminal is connected to the other end of the resistor R66 and one end of the resistor R93, and the negative power supply terminal of the amplifier U33 is connected to the positive electrode of the capacitor C71; the other end of the resistor R93 is connected to the capacitor C72; one end of the capacitor C75 is connected to one end of the resistor R69 and the other end of the resistor R94.

[0016] Specifically, the first direct current voltage conversion circuit comprises: a chip U36, a resistor R24, a capacitor C96, a capacitor C97 and a resistor R98; the port 7 of the chip U36 is connected to the capacitor C96, and the port 5 is connected to the resistor R24; the capacitor C97 is connected to the port 3 and the port 2 of the chip U36; and the resistor R98 is connected to the port 3 and the port 6 of the chip U36.

[0017] Specifically, the second direct current voltage conversion circuit comprises: a chip U37, a capacitor C70, a capacitor C59 and a resistor R60; the port 7 of the chip U37 is connected to the capacitor C59; the capacitor C70 is connected to the port 3 and the port 2 of the chip U37; and the resistor R60 is connected to the port 3 and the port 6 of the chip U37.

[0018] Specifically, the communication module comprises: a chip U12, a capacitor C32, a capacitor C33, a capacitor C34, a capacitor C35, a resistor R42, a resistor R48, a resistor R47, a resistor R50, a resistor R52, a resistor R54, a resistor FB5 and a two-way TVS diode D11; the port 1 of the chip U12 is connected to one end of the capacitor C33, C35 and the resistor FB5, the port 2 is connected to the other end of the capacitor C33, C35 and ports 7, 8, the port 16 is connected to one end of the resistor R52 and one end of the capacitor C32, C34, the port 15 is connected to the port 9 and grounded, the port 13 is connected to one end of the resistor R48, and the port 12 is connected to one end of the resistor R47; the other end of the capacitor C32 is connected to the other end of the capacitor C34 and grounded; the other end of the resistor R48 is connected to one end of the resistor R50, one end of the resistor R42 and the 2 end of the two-way TVS diode D11; the other end of the resistor R47 is connected to the other end of the resistor R50, one end of the resistor R54 and the 1 end of the two-way TVS diode D11; and the 3 end of the two-way TVS diode D11 is grounded.

[0019] The application has the advantages that:

[0020] Compared with the current module which can only process single voltage or current signal, the signal selection module is added on the circuit, the signal can be effectively distinguished, the user only needs to configure the accessed sensor type on the software, the hardware circuit will automatically switch, without manual increasing or decreasing jumper cap or developing different types of signal acquisition and processing device to process it. The method is simple and efficient, so that the sensor signal acquisition and processing device of the new type control system can access many types of sensors, and has wide versatility. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and serve to explain principles of the present application. Other embodiments and many of the intended advantages of the present application will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

[0022] Figure 1 is a structural schematic diagram of a control system sensor signal acquisition and processing device according to an embodiment of the present application;

[0023] Figure 2 is a circuit diagram of a signal input module of a control system sensor signal acquisition and processing device according to a specific embodiment of the present application;

[0024] Figure 3 is a circuit diagram of a first signal selection module of a control system sensor signal acquisition and processing device according to a specific embodiment of the present application;

[0025] Figure 4 is a circuit diagram of a second signal selection module of a control system sensor signal acquisition and processing device according to a specific embodiment of the present application;

[0026] Figure 5 is a circuit diagram of a first voltage comparison module of a control system sensor signal acquisition and processing device according to a specific embodiment of the present application;

[0027] Figure 6 is a circuit diagram of a second voltage comparison module of a control system sensor signal acquisition and processing device according to a specific embodiment of the present application;

[0028] Figure 7 is a circuit diagram of a third voltage comparison module of a control system sensor signal acquisition and processing device according to a specific embodiment of the present application;

[0029] Figure 8is a circuit diagram of a first direct current voltage conversion circuit of a control system sensor signal acquisition and processing device according to one specific embodiment of the present application;

[0030] Figure 9 is a circuit diagram of a second direct current voltage conversion circuit of a control system sensor signal acquisition and processing device according to one specific embodiment of the present application;

[0031] Figure 10 is a circuit diagram of a communication module of a control system sensor signal acquisition and processing device according to one specific embodiment of the present application. DETAILED DESCRIPTION

[0032] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration illustrative embodiments in which the application can be practiced. For purposes of explanation and illustration, directional terms are used with reference to the orientation of the described figures. However, it is to be understood that the embodiments can be practiced in other orientations than those presented in the figures. The directional terms used herein refer to the orientation of the figure under discussion. Because components of embodiments can be positioned in a number of orientations, the directional terminology is used for purposes of illustration and not limitation. It is to be understood that other embodiments can be utilized and structural or logical changes can be made without departing from the scope of the present application. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present application is defined by the appended claims.

[0033] As shown in Figure 1 , a control system sensor signal acquisition and processing device comprises a signal input module, a first signal selection module, a second signal selection module, a first voltage comparison module, a second voltage comparison module, a third voltage comparison module, a first direct current voltage conversion circuit, a second direct current voltage conversion circuit and a communication module; the signal input module is connected to the first signal selection module and the second signal selection module respectively; the first voltage comparison module is connected to the signal input module and the second signal selection module simultaneously; the second voltage comparison module is connected to the signal input module and the second signal selection module simultaneously; the third voltage comparison module is connected to the signal input module and the first signal selection module simultaneously; the communication module is connected to the first direct current voltage conversion circuit and the second direct current voltage conversion circuit simultaneously, and the communication module is used to receive data transmitted by each sensor; wherein the signal input module can be connected to different types of sensors.

[0034] As shown in Figure 2 , the signal input module comprises an input terminal JTG3, a diode D20, a diode D21 and a diode D22; the 2 terminal of the input terminal JTG3 is connected to the 1 terminal of the diode D21, the 3 terminal is connected to the 2 terminal of the diode D22, and the 4 terminal is connected to the 1 terminal of the diode D20; the 2 terminal of the diode D21 is connected to the 1 terminal of the diode D22 and grounded; and the 2 terminal of the diode D20 is grounded.

[0035] As shown in Figure 3 , the first signal selection module comprises: a relay U35, a transistor Q67, a capacitor C90, a capacitor C98, a resistor R89, a resistor R90, a diode D18 and a MOS tube Q55; the port 5 of the relay U35 is connected with the capacitor C90 and the capacitor C98 simultaneously; the port 1 of the relay U35 is connected with the drain of the MOS tube Q55 and the negative electrode of the diode D18 simultaneously; the port 3 of the relay U35 is connected with the port 3 of the terminal JTG3; the source of the MOS tube Q55 is connected with one end of the resistor R90, and the gate is connected with the other end of the resistor R90 and the collector of the transistor Q67 simultaneously; one end of the resistor R89 is connected with the base of the transistor Q67, and the other end is connected with the emitter of the transistor Q67.

[0036] As shown in Figure 4 , the second signal selection module comprises: a relay U30, a capacitor C88, a resistor R85, a resistor R86, a resistor R87, a MOS tube Q64, a resistor D17 and a transistor Q65; one end of the resistor R87 is connected with the port 6 of the relay U30; the other end of the resistor R87 is connected with the capacitor C88; the port 1 of the relay U30 is connected with the drain of the MOS tube Q64 and the negative electrode of the diode D17 simultaneously; one end of the resistor R86 is connected with the source of the MOS tube Q64; the gate of the MOS tube Q64 is connected with the other end of the resistor R86 and the collector of the transistor Q65 simultaneously; one end of the resistor R85 is connected with the base of the transistor Q65, and the other end is connected with the emitter of the transistor Q65.

[0037] As shown in Figure 5 , the first voltage comparison module comprises: an amplifier U25, a capacitor C84, a capacitor C80, a capacitor C67, a capacitor C46, a resistor R83, a resistor R76, a resistor R84, a resistor R82, a resistor R81, a resistor R77, a resistor R79, a resistor R80 and a reference voltage chip; the same-phase input end of the amplifier U25 is connected with one end of the resistor R77 and one end of the resistor R82 simultaneously, and the opposite-phase input end is connected with one end of the resistor R81 and one end of the resistor R79 simultaneously; the other end of the resistor R79 is connected with the output end of the amplifier U25 and one end of the resistor R80 simultaneously; the other end of the resistor R80 is connected with the capacitor C67; the port 1 of the reference voltage chip is connected with the capacitor C46, the port 2 is connected with the positive electrode of the capacitor C84, the capacitor C80, one end of the resistor R83 and one end of the resistor R84 simultaneously, and the port 3 is connected with the negative electrode of the capacitor C84 and the other end of the capacitor C80 simultaneously; the other end of the resistor R83 is connected with the other end of the resistor R81 and one end of the resistor R76 simultaneously; the other end of the resistor R84 is connected with the other end of the resistor R82.

[0038] As shown in Figure 6As shown, the second voltage comparison module comprises: an amplifier U28, a resistor R533, a resistor R532, a resistor R75, a resistor R101, a resistor R74, a resistor R72, a resistor R71, a resistor R70 and a capacitor C76; the non-inverting input terminal of the amplifier U28 is connected to one end of the resistor R72 and one end of the resistor R101, the inverting input terminal is connected to one end of the resistor R74 and one end of the resistor R71, and the output terminal is connected to the other end of the resistor R71 and one end of the resistor R70; the other end of the resistor R70 is connected to the capacitor C76; one end of the resistor R533 is connected to one end of the resistor R532 and the other end of the resistor R74, and the other end of the resistor R533 is connected to the other end of the resistor R101 through the resistor R75.

[0039] As shown in Figure 7 As shown, the third voltage comparison module comprises: an amplifier U33, a capacitor C75, a resistor R69, a resistor R93, a resistor R94, a resistor R95, a resistor R67, a resistor R66, a capacitor C71 and a capacitor C72; the non-inverting input terminal of the amplifier U33 is connected to one end of the resistor R67 and one end of the resistor R94, the inverting input terminal is connected to one end of the resistor R95 and one end of the resistor R66, and the output terminal is connected to the other end of the resistor R66 and one end of the resistor R93, and the negative power supply terminal of the amplifier U33 is connected to the positive electrode of the capacitor C71; the other end of the resistor R93 is connected to the capacitor C72; one end of the capacitor C75 is connected to one end of the resistor R69 and the other end of the resistor R94.

[0040] As shown in Figure 8 As shown, the first direct current voltage conversion circuit comprises: a chip U36, a resistor R24, a capacitor C96, a capacitor C97 and a resistor R98; the port 7 of the chip U36 is connected to the capacitor C96, and the port 5 is connected to the resistor R24; the capacitor C97 is connected to the port 3 and the port 2 of the chip U36 respectively; and the resistor R98 is connected to the port 3 and the port 6 of the chip U36 respectively.

[0041] As shown in Figure 9 As shown, the second direct current voltage conversion circuit comprises: a chip U37, a capacitor C70, a capacitor C59 and a resistor R60; the port 7 of the chip U37 is connected to the capacitor C59; the capacitor C70 is connected to the port 3 and the port 2 of the chip U37 respectively; and the resistor R60 is connected to the port 3 and the port 6 of the chip U37 respectively.

[0042] As shown in Figure 10As shown, the communication module includes: chip U12, capacitor C32, capacitor C33, capacitor C34, capacitor C35, resistor R42, resistor R48, resistor R47, resistor R50, resistor R52, resistor R54, resistor FB5 and two-way TVS diode D11; port 1 of chip U12 is connected to one end of capacitor C33, C35 and resistor FB5, port 2 is connected to the other end of capacitor C33, C35 and ports 7, 8, port 16 is connected to one end of resistor R52 and one end of capacitor C32, C34, port 15 is connected to port 9 and grounded, port 13 is connected to one end of resistor R48, port 12 is connected to one end of resistor R47; the other end of capacitor C32 is connected to the other end of capacitor C34 and grounded; the other end of resistor R48 is connected to one end of resistor R50, one end of resistor R42 and 2 end of two-way TVS diode D11; the other end of resistor R47 is connected to the other end of resistor R50, one end of resistor R54 and 1 end of two-way TVS diode D11; 3 end of two-way TVS diode D11 is grounded.

[0043] In a specific embodiment, the signal input module can be connected to PT100 temperature sensor, PT1000 temperature sensor, 4-20mA pressure sensor current signal in any one signal according to user needs in the same pin; the signal selection module is configured by the user through the host computer, automatically switches the hardware circuit, and accesses the selected sensor signal. The signal processing module includes filter circuit, voltage stabilizing circuit, amplifying circuit, etc. The voltage stabilizing circuit is used to give a stable reference signal, the filter circuit is used to filter the noise transmitted by the signal sensor, and the filtered signal is amplified and accessed to the chip for analog-digital signal processing. The control module mainly processes the sensor signal, converts the analog signal into digital signal, and transmits the obtained digital signal to the host computer through the serial communication mode. The host computer reads the obtained sensor signal to effectively monitor the refrigeration unit.

[0044] In addition, the application can stably operate in a vibration of 9Hz to 135Hz frequency, and has strong adaptability.

[0045] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the application without departing from the spirit and scope of the application. In this way, if these modifications and changes are within the scope of the claims of the application and their equivalents, the application also aims to cover these modifications and changes. The word "comprises" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not mean that the combination of these measures cannot be used to advantage. Any reference signs in the claims should not be considered as limiting the scope.

Claims

1. A sensor signal acquisition and processing device for a control system, characterized in that, include: The system comprises a signal input module, a first signal selection module, a second signal selection module, a first voltage comparison module, a second voltage comparison module, a third voltage comparison module, a first DC-DC voltage conversion circuit, a second DC-DC voltage conversion circuit, and a communication module. The signal input module is connected to both the first and second signal selection modules. The first voltage comparison module is connected to both the signal input module and the second signal selection module. The second voltage comparison module is connected to both the signal input module and the second signal selection module. The third voltage comparison module is connected to both the signal input module and the first signal selection module. The communication module is connected to both the first and second DC-DC voltage conversion circuits and is used to receive data transmitted from each sensor. The signal input module can connect to different types of sensors.

2. The control system sensor signal acquisition and processing device according to claim 1, characterized in that, The signal input module includes: input terminal JTG3, diode D20, diode D21, and diode D22; terminal 2 of input terminal JTG3 is connected to terminal 1 of diode D21, terminal 3 is connected to terminal 2 of diode D22, and terminal 4 is connected to terminal 1 of diode D20; terminal 2 of diode D21 is connected to terminal 1 of diode D22 and grounded; terminal 2 of diode D20 is grounded.

3. The control system sensor signal acquisition and processing device according to claim 2, characterized in that, The first signal selection module includes: a relay U35, a transistor Q67, capacitors C90 and C98, resistors R89 and R90, a diode D18, and a MOSFET Q55; port 5 of the relay U35 is connected to both capacitors C90 and C98; port 1 of the relay U35 is connected to both the drain of the MOSFET Q55 and the cathode of the diode D18; port 3 of the relay U35 is connected to port 3 of terminal JTG3; the source of the MOSFET Q55 is connected to one end of resistor R90, and the gate is connected to both the other end of resistor R90 and the collector of the transistor Q67; one end of resistor R89 ​​is connected to the base of the transistor Q67, and the other end is connected to the emitter of the transistor Q67.

4. The control system sensor signal acquisition and processing device according to claim 3, characterized in that, The second signal selection module includes: a relay U30, a capacitor C88, resistors R85, R86, and R87, a MOSFET Q64, a resistor D17, and a transistor Q65; port 6 of the relay U30 is connected to one end of the resistor R87; the other end of the resistor R87 is connected to the capacitor C88; port 1 of the relay U30 is simultaneously connected to the drain of the MOSFET Q64 and the cathode of the diode D17; the source of the MOSFET Q64 is connected to one end of the resistor R86; the gate of the MOSFET Q64 is simultaneously connected to the other end of the resistor R86 and the collector of the transistor Q65; one end of the resistor R85 is connected to the base of the transistor Q65, and the other end is connected to the emitter of the transistor Q65.

5. The control system sensor signal acquisition and processing device according to claim 4, characterized in that, The first voltage comparison module includes: amplifier U25, capacitors C84, C80, C67, and C46, ​​resistors R83, R76, R84, R82, R81, R77, R79, and R80, and a reference voltage chip; the non-inverting input terminal of amplifier U25 is connected to one end of resistor R77 and one end of resistor R82, and the inverting input terminal is connected to one end of resistor R81 and one end of resistor R79; the other end of resistor R79 is connected to amplifier U25. The output terminal of 25 is connected to one end of the resistor R80; the other end of the resistor R80 is connected to the capacitor C67; port 1 of the reference voltage chip is connected to the capacitor C46; port 2 is simultaneously connected to the positive terminal of the capacitor C84, the capacitor C80, the resistor R83, and one end of the resistor R84; port 3 is simultaneously connected to the negative terminal of the capacitor C84 and the other end of the capacitor C80; the other end of the resistor R83 is simultaneously connected to the other end of the resistor R81 and one end of the resistor R76; the other end of the resistor R84 is connected to the other end of the resistor R82.

6. The control system sensor signal acquisition and processing device according to claim 5, characterized in that, The second voltage comparison module includes: amplifier U28, resistors R533, R532, R75, R101, R74, R72, R71, R70, and capacitor C76; the non-inverting input terminal of amplifier U28 is connected to one end of resistor R72 and one end of resistor R101, the inverting input terminal is connected to one end of resistor R74 and one end of resistor R71, and the output terminal is connected to the other end of resistor R71 and one end of resistor R70; the other end of resistor R70 is connected to capacitor C76; one end of resistor R533 is connected to one end of resistor R532 and the other end of resistor R74, and the other end of resistor R533 is connected to the other end of resistor R101 through resistor R75.

7. The control system sensor signal acquisition and processing device according to claim 6, characterized in that, The third voltage comparison module includes: amplifier U33, capacitor C75, resistors R69, R93, R94, R95, R67, R66, capacitor C71, and capacitor C72; the non-inverting input terminal of amplifier U33 is connected to one end of resistor R67 and one end of resistor R94, the inverting input terminal is connected to one end of resistor R95 and one end of resistor R66, and the output terminal is connected to the other end of resistor R66 and one end of resistor R93. The negative power supply terminal of amplifier U33 is connected to the positive terminal of capacitor C71; the other end of resistor R93 is connected to capacitor C72; and one end of capacitor C75 is connected to one end of resistor R69 and the other end of resistor R94.

8. The control system sensor signal acquisition and processing device according to claim 7, characterized in that, The first DC voltage conversion circuit includes: chip U36, resistor R24, capacitor C96, capacitor C97 and resistor R98; port 7 of chip U36 is connected to capacitor C96 and port 5 is connected to resistor R24; the two ends of capacitor C97 are respectively connected to port 3 and port 2 of chip U36; the two ends of resistor R98 are respectively connected to port 3 and port 6 of chip U36.

9. A control system sensor signal acquisition and processing device according to claim 8, characterized in that, The second DC voltage conversion circuit includes: chip U37, capacitor C70, capacitor C59 and resistor R60; port 7 of chip U37 is connected to capacitor C59; the two ends of capacitor C70 are respectively connected to port 3 and port 2 of chip U37; the two ends of resistor R60 are respectively connected to port 3 and port 6 of chip U37.

10. A control system sensor signal acquisition and processing device according to claim 9, characterized in that, The communication module includes: chip U12, capacitors C32, C33, C34, and C35, resistors R42, R48, R47, R50, R52, R54, FB5, and a dual-channel TVS diode D11; port 1 of chip U12 is connected to one end of capacitors C33 and C35 and resistor FB5; port 2 is connected to the other end of capacitors C33 and C35 and ports 7 and 8; port 16 is connected to one end of resistor R52 and one end of capacitors C32 and C34; and port 15... Connect port 9 and ground; connect port 13 to one end of resistor R48; connect port 12 to one end of resistor R47; connect the other end of capacitor C32 to the other end of capacitor C34 and ground; connect the other end of resistor R48 to one end of resistor R50, one end of resistor R42, and two ends of dual-channel TVS diode D11; connect the other end of resistor R47 to the other end of resistor R50, one end of resistor R54, and one end of dual-channel TVS diode D11; ground the three ends of dual-channel TVS diode D11.

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