Single-wire non-contact series fixed type inclination sensor system

Abstract

The application discloses a single-wire non-contact series fixed type inclinometer sensor system, which comprises a driving collection unit, a current loop circuit connected with the driving collection unit, a plurality of magnetic rings arranged on the current loop circuit, a sensor circuit connected with the magnetic rings and an inclinometer, the driving collection unit is used for outputting a control signal and collecting sensor data, the current loop circuit is used for transmitting the control signal of the driving collection unit and the signal of the sensor data in the inductive magnetic ring, the magnetic ring is used for inducting the control signal of the current loop circuit and transmitting the control signal to the sensor circuit, the sensor circuit controls the inclinometer to measure, and the sensor circuit is also used for collecting the data measured by the inclinometer and transmitting the data back. Through the current loop circuit, the inclinometer is non-contact series connected in a through form, the non-contact connection does not have the waterproof sealing problem of cable joints, the distribution distance between the sensors can be adjusted at will in a non-fixed position, and the flexibility and reliability of field application are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to drilling equipment, in particular to a single-wire non-contact series fixed inclinometer sensor system. BACKGROUND

[0002] The inclinometer is a measuring instrument connected with the probe through the cable and connected with the measuring instrument through the winch and measuring instrument, wherein the probe reacts the horizontal displacement of the deep soil layer through the inclination sensor; the cable is responsible for communication and connection of the probe. In the case that the position of the rock-soil slope shear zone is clear, it is an effective method to arrange the fixed inclinometer in the shear zone and above the shear zone for long-term monitoring. The number of sensors arranged below the shear zone is reduced or not arranged, the spacing between the sensors above the shear zone is increased, and the arrangement is encrypted in the shear zone range, so as to reduce the occupation of the sensors and the cable, adapt to the limited space in the inclinometer tube, and improve the pertinence and construction efficiency of the monitoring.

[0003] The engineering example shows that the parallel fixed inclinometer system requires independent cable for each probe, and the internal space of the inclinometer tube is high. In order to break through the limitation of the space in the inclinometer tube on the occupation of the sensor and its cable, it has universal significance to develop a single-wire connected series inclinometer system. The existing series fixed inclinometer system has the advantages of small occupation and convenient installation, but the connection between the probe and the cable is still wired, and if the probe spacing needs to be adjusted or a probe needs to be replaced, the cable needs to be cut and reconnected, which has problems such as strict waterproof technology requirement at the cable joint part, and limits the flexibility and reliability of the field application. SUMMARY

[0004] The present application provides a flexible and reliable single-wire non-contact series fixed inclinometer sensor system.

[0005] Technical scheme: In order to solve the above problems, the present application adopts a single-wire non-contact series fixed inclinometer sensor system, which comprises a driving and collecting unit, a current loop circuit connected with the driving and collecting unit, a plurality of magnetic rings arranged on the current loop circuit, a sensor circuit connected with the magnetic ring, and an inclinometer connected with the sensor circuit. The driving and collecting unit is used for outputting control signals and collecting sensor data, the current loop circuit is used for transmitting control signals of the driving and collecting unit and taking out signals of the sensor data in the inductive magnetic ring, the magnetic ring is used for inducting control signals of the current loop circuit and transmitting to the sensor circuit, the sensor circuit controls the inclinometer to measure, and the sensor circuit is also used for collecting data measured by the inclinometer and transmitting the data back.

[0006] Further, the driving acquisition unit comprises a first master single-chip microcomputer U3, a bridge driving unit, an isolation transformer T8, and a back signal detection unit. The first master single-chip microcomputer U3 sends driving signals. The bridge driving unit receives the driving signals and processes the driving signals. The processed driving signals are transmitted to a sensor circuit through a current loop circuit and a magnetic ring. The sensor data signals transmitted back through the current loop circuit and the magnetic ring are taken out through the isolation transformer T8. The isolation transformer T8 transmits the signals to the back signal detection unit. The back signal detection unit processes the back signals and transmits the processed signals to the first master single-chip microcomputer. The first master single-chip microcomputer processes the signals to obtain the data collected by the inclinometer sensor.

[0007] Further, the bridge driving unit comprises an upper bridge driving chip U5, a lower bridge driving chip U2, and four power output field effect tubes connected with the upper bridge driving chip U5 and the lower bridge driving chip U2. The upper bridge driving chip U5 and the lower bridge driving chip U2 process the alternating driving wave signals sent by the first master single-chip microcomputer into alternating square wave signals. The alternating square wave signals are power-driven through the power output field effect tubes.

[0008] Further, the back signal detection unit comprises a limiting amplitude circuit and a Schmitt trigger circuit. The limiting amplitude circuit comprises a first resistor R28, a first limiting diode D7, and a second limiting diode D8. One end of the first resistor R28 is connected with the negative electrode of the first limiting diode D7. The positive electrode of the second limiting diode D8 is connected with the negative electrode of the first limiting diode D7. The negative electrode of the second limiting diode D8 is connected with the positive electrode of the first limiting diode D7. The other end of the first resistor R28 and the positive electrode of the first limiting diode D7 are respectively connected with two output ends of the isolation transformer T8. After the back signal is limited in amplitude and the peak is removed, the signal is sent to the Schmitt trigger circuit with adjustable threshold value to form a regular signal conforming to the level format of the first master single-chip microcomputer, which is sent to the first master single-chip microcomputer for processing.

[0009] Further, the driving acquisition unit further comprises a data communication circuit. The data communication circuit comprises a two-wire bus, a communication field effect tube N1, and a level shaping circuit. The source and drain of the communication field effect tube N1 are respectively connected with two wires of the bus. The gate of the communication field effect tube N1 is connected with the first master single-chip microcomputer, which is used to send information to the host through the two-wire bus. The level shaping circuit comprises a triode T3 and a communication voltage stabilizing diode Z1 connected with the first master single-chip microcomputer. The level shaping circuit is used to receive the information of the two-wire bus and send the processed information to the first master single-chip microcomputer.

[0010] Further, the sensor circuit comprises a rectifier / inverter circuit, a power supply circuit, a shaping circuit and a second master single-chip microcomputer, the rectifier / inverter circuit is used to convert the alternating current signal of the current loop of the magnetic ring into an intermittent direct current signal and convert the returned data signal into an alternating current signal; the power supply circuit is used to accumulate the current of the alternating current signal of the current loop of the magnetic ring to supply power to the sensor circuit, the shaping circuit is used to process the intermittent direct current signal after conversion into a square wave signal and transmit to the second master single-chip microcomputer for analysis; the second master single-chip microcomputer is used to analyze the square wave signal processed by the shaping circuit, collect the data measured by the inclinometer, and transmit the collected data measured by the inclinometer to the rectifier / inverter circuit after information coding processing.

[0011] Further, the second master single-chip microcomputer analyzes the square wave signal processed by the shaping circuit, identifies the address number information contained therein, and performs address comparison, and returns the data measured by the inclinometer with successful address comparison.

[0012] Further, the rectifier / inverter circuit comprises a bidirectional motor drive chip U3, a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3 and a fourth rectifier diode D4, two outputs of the bidirectional motor drive chip U3 are connected to two poles of the magnetic ring circuit respectively, a positive pole of the first rectifier diode D1 and a negative pole of the second rectifier diode D2 are connected to one pole of the magnetic ring circuit, a positive pole of the third rectifier diode D3 and a negative pole of the fourth rectifier diode D4 are connected to the other pole of the magnetic ring circuit, a negative pole of the first rectifier diode D1 and a negative pole of the third rectifier diode D3 are connected and then connected to one pole of the power supply circuit, a positive pole of the second rectifier diode D2 and a positive pole of the fourth rectifier diode D4 are connected and then connected to the other pole of the power supply circuit, and two inputs of the bidirectional motor drive chip U3 are connected to the second master single-chip microcomputer.

[0013] Further, the power supply circuit comprises a bleeder circuit, an isolation filter starting circuit and a voltage stabilizing circuit, the bleeder circuit comprises a parallel-connected voltage stabilizing diode and a capacitor, the isolation filter starting circuit comprises a fifth sensor diode D5 for isolating the power supply source from the power consumption and a polarity capacitor for accumulating voltage.

[0014] Further, the sensor circuit further comprises a sensor interface for connecting the inclinometer and a programming interface for writing and debugging, and the sensor interface and the programming interface are connected to the second master single-chip microcomputer.

[0015] Beneficial effects: The present application has the remarkable advantages over the prior art that the inclinometer sensors which need to collect data are connected together in series by the current loop line, and the data of each sensor can be obtained; the connection between the sensor and the current loop line adopts the through form, the non-contact connection does not have the waterproof sealing problem of the cable joint, the distribution distance between the sensors in the non-fixed position can be adjusted at will, and the flexibility and reliability of the inclinometer sensor system in field application are realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure of the fixed inclinometer sensor system in the present application is shown.

[0017] Figure 2 The working principle diagram of the driving collection unit in the present application is shown.

[0018] Figure 3 The circuit principle diagram of the power supply circuit and the data communication circuit in the present application is shown.

[0019] Figure 4 The circuit principle diagram of the first master single-chip microcomputer in the present application is shown.

[0020] Figure 5 The circuit principle diagram of the back signal detection circuit and the bridge driving unit in the present application is shown.

[0021] Figure 6 The working principle diagram of the sensor circuit in the present application is shown.

[0022] Figure 7 The circuit principle diagram of the sensor circuit in the present application is shown. DETAILED DESCRIPTION

[0023] As Figure 1 shown, the single-wire non-contact series fixed inclinometer sensor system in the embodiment includes a driving collection unit, a current loop line connected with the driving collection unit, a plurality of magnetic rings arranged on the current loop line, a sensor circuit connected with the magnetic rings, and an inclinometer connected with the sensor circuit. The driving collection unit is used for outputting a control signal and collecting sensor data. The current loop line is used for transmitting the control signal of the driving collection unit and the signal of the sensor data in the magnetic ring. The magnetic ring is used for sensing the control signal of the current loop line and transmitting it to the sensor circuit. The sensor circuit is used for controlling the inclinometer to measure. The sensor circuit is also used for collecting the data measured by the inclinometer and transmitting it back.

[0024] As Figure 2As shown, the driving acquisition unit is sent by the first master single-chip microcomputer a 2000 Hz driving wave signal, which is output to "bridge driving up" and "bridge driving down" respectively. The outputs of the upper and lower bridges are sent to the MOS switch array, which converts 12 V DC into 2000 Hz AC, which is sent to the sensor through the current loop. The length of the time for which the sensor is powered by the AC power corresponds to the exact information. When powered for a long time, the sensor is given sufficient energy, and when the energy in the sensor accumulates to a level at which it can be started, the current loop can use different short pauses to transmit information to the sensor. A shorter pause (10 ms) represents information 0, and a longer pause (20 ms) represents information 1. The combination of these information is sent to the sensor, which will generate a response. The response is completed in the order of the sensor numbers, and the response information is taken out through the isolation transformer circuit, first through the limiting circuit, and then through the Schmidt shaping circuit to the first master single-chip microcomputer. The response information also uses long or short information to represent information 0 or information 1, and the first master single-chip microcomputer uses a program to identify the sequence of these 0s and 1s, and finally combines them into sensor data.

[0025] The driving acquisition unit includes a first master single-chip microcomputer, a bridge driving unit, an isolation transformer T8, a back signal detection unit, a power supply circuit, and a data communication circuit.

[0026] As shown in Figure 3 , the power supply circuit includes a diode D1 connected in series with the bus, a plurality of parallel capacitors (C12, C13, C14), and a voltage stabilizing block W1. The power supply circuit obtains power from the two-wire bus (T1, T2), and supplies power to each part through the voltage stabilizing circuit. Since the two-wire bus also serves as a signal transmission, digital 0 and digital 1 flow through the bus, causing the voltage of the bus to be intermittent. Therefore, the diode D1 and the large-capacity power storage capacitor C12 are added to ensure that the bus can allow the occurrence of power-off moments, while ensuring that the power supply to the system is normal during power-off.

[0027] The data communication circuit includes a two-wire bus connected to the communication host, a communication field effect transistor N1, and a level shaping circuit. The communication host uses a short-circuit current source for power supply, and the length of the short-circuit time each time represents a different digital quantity. Both the host and the extension can short-circuit the current bus to send information to each other. The source and drain of the communication field effect transistor N1 are connected to the two wires of the bus, and the gate of the communication field effect transistor N1 is connected to the first master single-chip microcomputer. The communication field effect transistor N1 is responsible for sending information to the host; the voltage stabilizing diode Z1 and the transistor T3 form a level shaping circuit responsible for receiving bus information and converting it into an appropriate level to send to the first master single-chip microcomputer.

[0028] As shown in Figure 4The first main control single-chip U3 is used to collect sensor data, output the collected data to the bus, complete the bridge driving of the current loop, monitor the temperature and humidity of the environment where the driving circuit is located, and controls the operation process of the whole driving circuit. The first main control single-chip U3 outputs a 2000 Hz driving wave signal to the bridge driving unit.

[0029] As shown in Figure 5 The bridge driving unit includes an upper bridge driving chip U5, a lower bridge driving chip U2 and four power output field effect tubes (N3, N4, N5, N6) connected with the first main control single-chip respectively. The first main control single-chip generates an alternating signal with a frequency of 2000 Hz to the bridge driving chip, which is amplified by the bridge driving chip and then sent to the field effect tube to complete the power driving. The current loop transmits the signal to each sensor unit to complete the power supply to each sensor. In addition, the current driving is intermittent. The regular interval represents the information to be transmitted to the inclinometer sensor. During the interval, the inclinometer sensor cannot be powered and needs to rely on its own power storage to work, so the interval time cannot be too long. In addition, the output end of the bridge driving unit is connected with a current regulating inductor I1 to adjust the output current. The sensor unit circuit has a certain resistance to the current of the current loop, and the number of sensor circuit units that can be driven by each bridge driving unit has a certain span. However, when the number of sensors is too large, the size of the inductor connected in series can be appropriately adjusted.

[0030] The back signal detection unit includes a limiting circuit and a Schmidt shaping circuit. The limiting circuit includes a first resistor R28, a first limiting diode D7 and a second limiting diode D8. One end of the first resistor R28 is connected with the negative electrode of the first limiting diode D7. The positive electrode of the second limiting diode D8 is connected with the negative electrode of the first limiting diode D7. The negative electrode of the second limiting diode D8 is connected with the positive electrode of the first limiting diode D7. The other end of the first resistor R28 and the positive electrode of the first limiting diode D7 are respectively connected with two output ends of an isolation transformer T8. After the bridge driving unit transmits information to the sensor unit circuit, the sensor unit with a successful address comparison will transmit data back. The back information is represented by a 2KHz alternating signal. The duration of the signal represents digital 0 and digital 1 respectively. The signal is taken out by the isolation transformer T8. After the limiting and peak clipping of the back signal by the limiting circuit, the signal is sent to the Schmidt shaping circuit with adjustable threshold to form a regular signal conforming to the level format of the first main control single-chip, which is sent to the first main control single-chip for processing. The first main control single-chip processes the processed signal to obtain the data collected by the inclinometer sensor.

[0031] As shown in Figure 6As shown, the sensor circuit includes a rectifier / inverter circuit, a power supply circuit, a shaping circuit and a second master single-chip microcomputer. The rectifier / inverter circuit is used to convert the alternating current signal of the current loop of the magnetic ring into an intermittent direct current signal, and to convert the returned data signal into an alternating current signal. The power supply circuit includes a bleeder circuit, an isolation filter starting circuit and a voltage stabilizing circuit. The power supply circuit is used to accumulate the current of the alternating current signal of the current loop of the magnetic ring to supply power to the sensor circuit. The starting circuit is used to not apply voltage to the circuit behind it during the process of accumulating the supply voltage, but to suddenly apply it to the circuit behind it when the accumulated voltage meets the requirements. The purpose is to prevent the accumulated slow change process from being applied to the circuit behind it. The shaping circuit is used to process the converted intermittent direct current signal into a square wave signal and transmit it to the second master single-chip microcomputer for analysis. The second master single-chip microcomputer is used to analyze the square wave signal processed by the shaping circuit, collect the data measured by the inclinometer sensor, process the collected data measured by the inclinometer sensor, and transmit it to the rectifier / inverter circuit.

[0032] The alternating current generated by the driving collection unit is added to the current loop, then passes through the magnetic ring of the sensor, is inducted to the rectifier / inverter circuit through the magnetic ring, the rectifier / inverter circuit converts the alternating current of the current loop into direct current, forms a direct current voltage through the bleeder circuit and the isolation filter, the direct current voltage gradually rises with the power supply time of the current loop, when the starting voltage is reached, the control starting circuit works, the voltage is sent to the voltage stabilizing chip, and then to the second master single-chip microcomputer and the sensor for power supply. The second master single-chip microcomputer controls the inclinometer sensor to complete data collection and temporarily stores it in the second master single-chip microcomputer. Then the current loop is powered for a long time to become power with information, when the address formed by the information matches the address of the inclinometer sensor, the second master single-chip microcomputer sends the data of the inclinometer sensor to the magnetic ring through the control end of the rectifier / inverter circuit, and then sends the information to the current loop through the magnetic ring. The current loop transmits the information to the driving collection unit, which is responsible for collecting the data information of the inclinometer sensor.

[0033] As Figure 7As shown, the rectifier / inverter circuit includes a bidirectional motor drive chip U3, a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3, and a fourth rectifier diode D4. Two-way output of the bidirectional motor drive chip U3 is connected to two poles of the magnetic ring circuit. The anode of the first rectifier diode D1 and the cathode of the second rectifier diode D2 are connected to one pole of the magnetic ring circuit. The anode of the third rectifier diode D3 and the cathode of the fourth rectifier diode D4 are connected to the other pole of the magnetic ring circuit. The cathode of the first rectifier diode D1 and the cathode of the third rectifier diode D3 are connected to one pole of the power supply circuit. The anode of the second rectifier diode D2 and the anode of the fourth rectifier diode D4 are connected to the other pole of the power supply circuit. Two-way input of the bidirectional motor drive chip U3 is connected to the second master single-chip microcomputer. The rectifier / inverter circuit has two functions. One is to convert the high-frequency alternating current signal from the current loop into direct current signal when receiving the control information of the inclinometer sensor. The other is to convert the collected information of the inclinometer sensor into alternating current signal.

[0034] The bleeder circuit includes a parallel-connected voltage stabilizing diode and a capacitor. The voltage stabilizing diode is used to suppress excessively high voltage. The capacitor is used to convert the gap signal from the current loop into a square wave, so as to ensure that the voltage is reduced to zero during the intermittent time.

[0035] The isolation filter starting circuit includes a fifth sensor diode D5 for isolating the power supply source from the power consumption and a polarity capacitor for accumulating voltage. The fifth sensor diode D5 is used to isolate the power supply source from the power consumption, so as to ensure that the power supply to the inclinometer sensor is uninterrupted during the gap period of the current loop power supply. In addition, the current from the current loop is weak, and it takes several seconds to reach the rated voltage of the second master single-chip microcomputer and the inclinometer sensor. During this period, the voltage is a relatively slow accumulation process, and the device, especially the single-chip microcomputer, cannot withstand the slow voltage start, which may cause the start reset to fail. Through the starting circuit, the power supply to the circuit is stopped during the voltage accumulation period, and the power supply is started only after the rated voltage is reached.

[0036] The voltage stabilizing circuit is a classic 7805 voltage stabilizing module, which stabilizes the voltage from the current loop at 5V for the second master single-chip microcomputer and the inclinometer sensor.

[0037] The second master single-chip microcomputer analyzes the square wave signal processed by the shaping circuit, identifies the address number information contained therein, and performs address comparison. The data measured by the inclinometer sensor with successful address comparison is transmitted back. The second master single-chip microcomputer is also responsible for collecting the data of the sensor when the power supply reaches the rated value and temporarily storing the data in its internal memory, waiting for the query of the current loop. In addition, the transmission information needs to be converted into intermittent alternating current form, which is also completed by the second master single-chip microcomputer.

[0038] The shaping circuit is responsible for shaping the intermittent signal from the current loop into a regular square wave signal for the second master single-chip microcomputer to analyze.

[0039] The sensor circuit further comprises a sensor interface for connecting the inclinometer sensor and a programming interface for programming and debugging, and the sensor interface and the programming interface are connected with the second master single-chip microcomputer. The sensor interface connects the inclinometer sensor, supplies power to the inclinometer sensor, and reads the data measured by the inclinometer sensor. The programming interface is used to program the second master single-chip microcomputer, and obtains intermediate information during debugging. The sensor circuit further comprises an indicator light, which has two colors of red and blue, and the flashing of the indicator light follows certain rules, which can indicate whether the sensor is selected by the driving collection unit and whether it is in data return. In a string of sensors, the process of being selected and returning data can be demonstrated by seeing the red light being lit one by one, followed by the green light being lit, which plays an auxiliary role in the process of debugging and monitoring work.

Claims

1. A single-line non-contact serial fixed inclinometer sensor system, characterized in that: The system comprises a drive acquisition unit, a current loop circuit connected to the drive acquisition unit, a plurality of magnetic rings arranged on the current loop circuit, a sensor circuit connected to the magnetic rings, and an inclinometer sensor connected to the sensor circuit. The drive acquisition unit is used to output control signals and acquire sensor data. The current loop circuit is used to transmit control signals of the drive acquisition unit and to extract signals for inducing sensor data from the magnetic rings. The magnetic rings are used to induce control signals of the current loop circuit and transmit them to the sensor circuit. The sensor circuit controls the inclinometer sensor to perform measurements. The sensor circuit is also used to acquire data measured by the inclinometer sensor and transmit the data back. The drive acquisition unit includes a first main control microcontroller U3, a bridge drive unit, an isolation transformer T8, and a feedback signal detection unit. The first main control microcontroller U3 sends a drive signal, the bridge drive unit receives the drive signal and processes the drive signal, and the processed drive signal is transmitted to the sensor circuit through the current loop and the magnetic ring. The sensor data signal transmitted back by the sensor circuit through the magnetic ring and the current loop is taken out through the isolation transformer T8, and the isolation transformer T8 transmits the signal to the feedback signal detection unit. The feedback signal detection unit processes the feedback signal and transmits it to the first main control microcontroller U3. The first main microcontroller U3 processes the processed signal to obtain data collected by the inclinometer sensor. The bridge driving unit includes an upper bridge driving chip U5 and a lower bridge driving chip U2 respectively connected to the first main control microcontroller U3, and four power output field effect transistors connected to the upper bridge driving chip U5 and the lower bridge driving chip U2. The upper bridge driving chip U5 and the lower bridge driving chip U2 process the alternating driving wave signal emitted by the first main control microcontroller U3 into an AC square wave signal, and the AC square wave signal is driven by the power output field effect transistor for power. The sensor circuit includes a rectifier / inverter circuit, a power supply circuit, a shaping circuit, and a second main control microcontroller. The rectifier / inverter circuit is used to convert the AC signal of the current loop circuit induced by the magnetic ring into an intermittent DC signal, and to convert the returned data signal into an AC signal; the power supply circuit is used to accumulate the current of the AC signal of the current loop circuit induced by the magnetic ring and then power the sensor circuit; the shaping circuit is used to process the converted intermittent DC signal into a square wave signal and then transmit it to the second main control microcontroller for analysis; the second main control microcontroller is used to analyze the square wave signal processed by the shaping circuit, and to collect data measured by the inclinometer sensor, and then perform information encoding processing on the collected data measured by the inclinometer sensor and transmit it to the rectifier / inverter circuit; The second main control single chip computer analyzes the square wave signal processed by the shaping circuit, identifies the address number information contained therein, performs address comparison, and transmits back the data measured by the inclinometer sensor with successful address comparison.

2. The single-line non-contact serial fixed inclinometer sensor system according to claim 1, characterized in that: The return signal detection unit includes a limiting circuit and a Schmidt shaping circuit. The limiting circuit includes a first resistor R28, a first limiting diode D7, and a second limiting diode D8. One end of the first resistor R28 is connected to the cathode of the first limiting diode D7, the anode of the second limiting diode D8 is connected to the cathode of the first limiting diode D7, and the cathode of the second limiting diode D8 is connected to the anode of the first limiting diode D7. The other end of the first resistor R28 and the anode of the first limiting diode D7 are respectively connected to the two output ends of the isolation transformer T8. After being limited and de-peaked by the limiting circuit, the return signal is sent to the Schmidt shaping circuit with an adjustable threshold to form a regular signal that conforms to the level format of the first master microcontroller U3 and is sent to the first master microcontroller U3 for processing.

3. The single-line non-contact serial fixed inclinometer sensor system according to claim 1, characterized in that: The drive acquisition unit also includes a data communication circuit, which includes a two-wire bus, a communication field-effect transistor N1 and a level shaping circuit. The source and drain of the communication field-effect transistor N1 are respectively connected to the two lines of the bus, and the gate of the communication field-effect transistor N1 is connected to the first master microcontroller U3, and is used to send information to the host through the two-wire bus; the level shaping circuit includes a transistor T3 connected to the first master microcontroller U3 and a communication voltage-stabilizing diode Z1. The level shaping circuit is used to receive information from the two-wire bus and send it to the first master microcontroller U3 after processing.

4. The single-line non-contact serial fixed inclinometer sensor system according to claim 3, characterized in that: The rectifier / inverter circuit includes a bidirectional motor driver chip U3, a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3, and a fourth rectifier diode D4. The two outputs of the bidirectional motor driver chip U3 are respectively connected to the two poles of the magnetic ring loop, the positive pole of the first rectifier diode D1 and the negative pole of the second rectifier diode D2 are connected to one pole of the magnetic ring loop, the positive pole of the third rectifier diode D3 and the negative pole of the fourth rectifier diode D4 are connected to the other pole of the magnetic ring loop, the negative pole of the first rectifier diode D1 is connected to the negative pole of the third rectifier diode D3 and then connected to one pole of the power supply circuit, the positive pole of the second rectifier diode D2 and the positive pole of the fourth rectifier diode D4 are connected to the other pole of the power supply circuit, and the two inputs of the bidirectional motor driver chip U3 are connected to the second master microcontroller.

5. The single-line non-contact serial fixed inclinometer sensor system according to claim 3, characterized in that: The power supply circuit includes a discharge circuit, an isolation filter startup circuit and a voltage stabilization circuit. The discharge circuit includes a voltage stabilization diode and a capacitor connected in parallel. The isolation filter startup circuit includes a fifth sensor diode D5 for isolating the power source from the power consumption and a polarity capacitor for accumulating voltage.

6. The single-line non-contact serial fixed inclinometer sensor system according to claim 3, characterized in that: The sensor circuit further comprises a sensor interface for connecting to an inclinometer sensor and a programming interface for writing and debugging. The sensor interface and the programming interface are connected to the second main control microcontroller.

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