Wireless inclinometer monitoring system based on U-shaped pipe automatic verification

Abstract

The invention discloses a wireless inclinometer monitoring system based on automatic verification of a U-shaped pipe, and relates to the technical field of building safety monitoring, and the system comprises an inclination measurement module which collects the inclination change of a monitored object, converts the inclination angle into an electric signal, and outputs the electric signal; the U-shaped tube automatic checking module is used for calculating an actual inclination angle by detecting the liquid level change of the conductive liquid so as to calibrate the test data of the inclination measurement module; the data processing module is used for performing primary processing on the data acquired by the inclination measurement module, correcting an inclination measurement result according to the calibration data of the U-shaped pipe, finally obtaining accurate inclination angle data, and performing packaging processing on the data; a wireless communication module; a power supply module; according to the invention, the stability and reliability of the measurement precision can be improved, and the requirements of application scenes with extremely high requirements on the stability and reliability of monitoring data, such as dangerous buildings, industrial tanks and bridges, are met.

Description

Technical Field

[0001] This invention belongs to the field of building safety monitoring technology, specifically relating to a wireless inclinometer monitoring system based on automatic calibration of a U-tube. Background Technology

[0002] In numerous engineering fields such as building structure monitoring, bridge health monitoring, slope stability monitoring, and industrial equipment operation status monitoring, accurate measurement and real-time monitoring of the tilt angle of objects are crucial for ensuring structural safety and preventing risks.

[0003] Currently, there are various tilt measurement methods and devices on the market, such as leveling, electronic tilt meters based on MEMS technology, and wireless tilt meter monitoring systems. Among them, wireless tilt meter monitoring systems are widely used due to their high layout flexibility. Wireless inclinometer monitoring systems achieve data transmission through wireless communication technology, which greatly improves the flexibility of system layout. However, due to the need for professional technicians to perform precise debugging and complex wiring during system installation, the requirements for the installation environment and personnel's technical level are stringent, resulting in long installation cycles and high labor costs. Moreover, in complex electromagnetic interference, signal obstruction, and long-term continuous operation scenarios, problems such as data loss, transmission interruption, or increased measurement errors are prone to occur, making it difficult to meet the needs of application scenarios such as dilapidated buildings, industrial tanks, and bridges where the stability and reliability of monitoring data are extremely important. Summary of the Invention

[0004] The purpose of this invention is to provide a wireless inclinometer monitoring system based on automatic calibration of a U-tube, which can improve the stability and reliability of measurement accuracy and meet the needs of application scenarios such as dilapidated buildings, industrial tanks, and bridges where the stability and reliability of monitoring data are extremely important, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The wireless inclinometer monitoring system based on U-tube automatic calibration includes: an inclinometer module that collects the inclinometer changes of the monitored object and converts the inclinometer angle into an electrical signal output; The U-tube automatic calibration module includes a U-tube filled with conductive liquid and multiple liquid level detection electrodes located on both sides of the U-tube. It calculates the actual tilt angle by detecting changes in the liquid level of the conductive liquid, so as to calibrate the test data of the tilt measurement module. The data processing module is used to perform preliminary processing on the data collected by the tilt measurement module, and to correct the tilt measurement results according to the calibration data of the U-tube, so as to obtain accurate tilt angle data. At the same time, the data is packaged and processed. The wireless communication module uses an anti-interference communication protocol and signal enhancement technology to wirelessly transmit the data processed by the data processing module. The power supply module provides power to the tilt measurement module, the U-tube automatic calibration module, the data processing module, and the wireless communication module.

[0006] Preferably, the tilt measurement module includes a tilt sensor, which includes a MEMS tilt sensing chip and a PCB substrate for integrating the MEMS tilt sensing chip, and the data processing module is integrated on the PCB substrate.

[0007] Preferably, the U-shaped tube is a transparent tube made of a rigid material, and the plurality of liquid level detection electrodes are evenly distributed along the height direction of the U-shaped tube.

[0008] Preferably, the liquid level detection electrode is a platinum electrode or a gold-plated copper electrode, and the number of electrodes on each side of the pipe wall is at least 8, with a spacing of 5-10 mm between adjacent electrodes.

[0009] Preferably, the conductive liquid is conductive silicone oil or a 5%-10% lithium chloride aqueous solution, with a conductivity of 10-100 mS / cm at 25°C.

[0010] Preferably, the data processing module includes a programmable microcontroller that processes tilt measurement data and corrects U-tube calibration data by writing data processing and calibration programs in the microcontroller.

[0011] Preferably, the power module includes a solar panel, a rechargeable lithium battery, and a power management chip. The power management chip is electrically connected to the solar panel and the lithium battery, respectively. When there is sunlight, the solar panel converts light energy into electrical energy to supply power and charge the lithium battery. When there is no sunlight, the lithium battery supplies power.

[0012] Preferably, the wireless communication module includes a communication chip using low-power wide-area network communication, an antenna, and a radio frequency circuit. The communication chip is electrically connected to the antenna and the radio frequency circuit, respectively, to wirelessly transmit the tilt angle data packaged by the data processing module to the remote monitoring center, and to receive control commands sent by the remote monitoring center, thereby realizing two-way communication.

[0013] Preferably, it also includes an installation structure, on which the tilt measurement module, U-tube automatic calibration module, data processing module, wireless communication module and power supply module are all mounted.

[0014] Preferably, the installation structure includes a magnetic base for adsorbing onto the surface of a metal monitoring object and a quick-release buckle structure. The magnetic base is embedded with a high-strength permanent magnet, and one end of the quick-release buckle structure is fixed to the surface of a non-metallic monitoring object with strong adhesive.

[0015] The wireless inclinometer monitoring system based on automatic calibration using a U-tube proposed in this invention has the following advantages compared with existing technologies: 1. This invention reduces reliance on expensive, high-precision sensors by combining a U-tube automatic calibration module, a tilt measurement module, and a wireless communication module. At the same time, it optimizes the design of the wireless communication module, selects cost-effective communication chips and circuit architecture, simplifies system equipment, and reduces overall hardware costs. 2. This invention, through the cooperation of the power module and the wireless communication module, adopts anti-interference communication protocols and signal enhancement technology to reduce the impact of electromagnetic interference and ensure stable and reliable data transmission. At the same time, it optimizes the design of system power management and equipment heat dissipation to improve the stability of the system during long-term operation. 3. This invention utilizes the U-tube automatic calibration function to calibrate tilt measurement data in real time, compensating for measurement errors caused by environmental factors and equipment aging, and improving measurement accuracy and stability. Attached Figure Description

[0016] Figure 1 This is a system block diagram of the present invention; Figure 2 This is a schematic diagram illustrating the principle of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention provides, for example Figure 1-2 The wireless tiltmeter monitoring system based on U-tube automatic calibration shown includes a tilt measurement module, a U-tube automatic calibration module, a data processing module, a wireless communication module, and a power supply module. The tilt measurement module senses the tilt of the monitored object and converts it into an electrical signal. The U-tube automatic calibration module calculates the actual tilt angle through changes in the conductive liquid level. The data processing module combines the data from both modules to complete correction and packaging. The wireless communication module enables bidirectional transmission of data and commands. The power supply module provides continuous power to the entire system, ultimately achieving high-precision and stable tilt monitoring, reducing reliance on expensive high-precision sensors. At the same time, the wireless communication module design is optimized, using cost-effective communication chips and circuit architectures, and the system's supporting equipment is simplified, reducing the overall hardware cost. The tilt measurement module acquires the tilt changes of the monitored object and converts the tilt angle into an electrical signal output. The tilt measurement module includes a tilt sensor, which includes a MEMS tilt sensing chip and a PCB substrate for integrating the MEMS tilt sensing chip. The data processing module is integrated on the PCB substrate to ensure that the MEMS tilt sensing chip and the tilt changes of the monitored object are sensed synchronously. The MEMS tilt sensing chip, as the core sensing element, directly captures the physical quantity of tilt and converts it into an electrical signal. Integrating the data processing module on the same PCB substrate shortens the signal transmission path, reduces signal loss and interference, and improves data processing efficiency. The U-tube automatic calibration module includes a U-tube filled with conductive liquid and multiple liquid level detection electrodes located on both sides of the U-tube. It calculates the actual tilt angle by detecting changes in the liquid level of the conductive liquid, so as to calibrate the test data of the tilt measurement module. The U-shaped tube is a transparent tube made of a rigid material, such as borosilicate glass or acrylic. For example, the inner diameter of the U-shaped tube used is 8-12mm and the tube length is 150-200mm. The rigid transparent tube ensures the structural stability of the U-shaped tube and avoids deformation affecting the liquid level measurement. Multiple liquid level detection electrodes are evenly distributed along the height direction of the U-shaped tube, which can accurately capture the minute liquid level changes of the conductive liquid when tilted. When the system is tilted, the liquid in the U-shaped tube moves accordingly. Different liquid level heights correspond to different electrode conduction states. By detecting the combination of conduction electrodes, the liquid level difference can be calculated, and then the actual tilt angle of the system can be obtained. This is used to calibrate the measurement data of the tilt measurement module. By judging the combination of electrode conduction states, high-precision calculation of the liquid level difference can be achieved, providing a reliable benchmark for tilt data calibration. The liquid level detection electrode is a platinum electrode or a gold-plated copper electrode. Platinum or gold-plated copper electrodes have excellent conductivity and corrosion resistance, avoiding oxidation failure caused by long-term contact with conductive liquid. There are at least 8 electrodes on each side of the pipe wall, and the distance between adjacent electrodes is 5-10 mm. Sufficient number of electrodes and reasonable spacing ensure sensitivity to minute liquid level changes and achieve accurate quantification of liquid level difference. The conductive liquid is conductive silicone oil or a 5%-10% lithium chloride aqueous solution. It is a low-volatility and high-stability conductive liquid, which avoids liquid level drop or conductivity change due to volatilization during long-term use. Its conductivity at 25°C is 10-100 mS / cm, which can be matched with the conductivity range of the electrode to ensure clear electrode conduction signal and accurate identification of liquid level height, while avoiding leakage interference caused by excessive conductivity. The data processing module is used to perform preliminary processing on the data collected by the tilt measurement module. The preliminary processing includes filtering and noise reduction to remove acoustic interference signals, and correcting the tilt measurement results according to the calibration data of the U-tube, so as to obtain accurate tilt angle data. At the same time, the data is packaged. The conditions for the data processing module to start automatic calibration of the U-tube are: the tilt angle change rate exceeds 0.05° / h for more than 10 minutes, or the time since the last calibration is 14 days ± 24 hours. The data processing module includes a programmable microcontroller, which processes tilt measurement data and corrects data based on U-tube calibration data by writing data processing and calibration programs in the microcontroller. The data processing module receives the electrical signal output from the tilt measurement module and the liquid level detection data from the U-tube automatic calibration module. After preliminary processing of the data from the tilt hole, it corrects the tilt measurement results using a dynamic weighting formula based on the calibration data of the U-tube, obtaining accurate tilt angle data and packaging it. The dynamic weighting formula is as follows: , In the formula, To correct the data, For wireless inclinometer data, The weighting coefficients are dynamically adjusted according to the rate of change of the tilt angle. The elevation difference in the U-tube calibration data, where L is the building height; For example, The adjustment range is 0.3-0.8. When the rate of change of tilt angle is ≤0.02° / h, The value is taken as 0.6-0.8. When the rate of change of inclination angle is >0.02° / h, The value ranges from 0.3 to 0.5; The data processing module packages the tilt angle data in JSON format. The JSON format includes the device number, acquisition timestamp, X-axis correction angle, Y-axis correction angle, U-tube liquid level difference, and battery voltage information. The data transmission baud rate is 9600bps.

[0019] The microcontroller has built-in flash memory, pre-stored with data processing programs, calibration algorithms containing dynamic weighting formulas, and communication protocol configurations. After the system is powered on, the microcontroller automatically executes the initialization program. Specifically, it configures the AD conversion interface for receiving analog electrical signals from the tilt sensor and the digital I / O interface for reading the conduction status of the U-tube electrodes; then it sets the data acquisition frequency (e.g., 5 minutes / time) and the calibration trigger threshold, such as an acquisition frequency of 5 minutes / time and a calibration trigger threshold of tilt angle change rate ≥ 0.05° / h or calibration interval ≥ 14 days; finally, it initializes the wireless communication module parameters. When processing tilt sensor data, the microcontroller converts the 0-3.3V analog electrical signal output by the tilt sensor into a digital signal through the AD conversion interface, executes filtering algorithms such as moving average filtering, removes spike noise caused by electromagnetic interference, and retains stable original tilt angle data. When processing the U-tube calibration data, the conduction status of the liquid level detection electrodes on both sides of the U-tube is read through the digital IO interface. Based on the uniform distribution of the electrodes (spacing 5-10mm), the liquid level height corresponding to the conduction combination is decoded, the liquid level difference on both sides is calculated, and the actual tilt angle is derived. In addition, the microcontroller also receives remote control commands forwarded by the wireless communication module. After parsing the commands, it starts the U-tube calibration process, modifies the internal parameter configuration, or provides feedback on the system operating status. The microcontroller works with the power management chip to monitor the battery voltage in real time and automatically reduce the power consumption of non-core functions when the battery is low, such as extending the wireless communication sleep time to ensure continuous operation.

[0020] The wireless communication module uses an anti-interference communication protocol and signal enhancement technology to wirelessly transmit the data processed by the data processing module. The wireless communication module includes a communication chip, an antenna, and a radio frequency circuit that employ low-power wide-area network (LPWAN) communication. If the LPWAN communication uses LoRa technology, the communication chip is electrically connected to the antenna and radio frequency circuit respectively. It wirelessly transmits the tilt angle data packaged by the data processing module to the remote monitoring center and receives control commands sent by the remote monitoring center, achieving bidirectional communication. The communication chip is model SX1276 or SX1268, paired with an optimized external antenna and radio frequency circuit to improve signal coverage. The communication frequency is set to 433MHz or 868MHz, supporting bidirectional communication. The antenna is used to convert the high-frequency electrical signal output by the radio frequency circuit into a space electromagnetic wave for radiation, and at the same time convert the space electromagnetic wave emitted by the remote monitoring center into a high-frequency electrical signal for transmission to the radio frequency circuit, in order to maximize signal transmission efficiency, extend transmission distance, and reduce signal attenuation; the radio frequency circuit converts the baseband digital signal output by the communication chip into a high-frequency carrier signal suitable for antenna radiation, and at the same time converts the high-frequency carrier signal received by the antenna into a baseband digital signal that the communication chip can process, in order to optimize signal quality, suppress interference, and achieve impedance matching with the antenna. Both the antenna and the radio frequency circuit are well known technologies in the art and will not be described in detail here. The power module provides power to the tilt measurement module, the U-tube automatic calibration module, the data processing module, and the wireless communication module.

[0021] The power module includes a solar panel, a rechargeable lithium battery, and a power management chip. The power management chip is electrically connected to the solar panel and the lithium battery respectively. When there is sunlight, the solar panel converts light energy into electrical energy to supply power and charge the lithium battery. When there is no sunlight, the lithium battery supplies power, ensuring the continuous and stable operation of the system. Solar panels include semiconductor PN junction structures, such as monocrystalline silicon and polycrystalline silicon. When sunlight shines on the semiconductor surface, photon energy is absorbed by the semiconductor, causing the electron-hole pairs inside to separate. Under the action of the built-in electric field of the PN junction, electrons move to the N region and holes move to the P region, forming a directional current. This generates a stable DC voltage and current at both ends of the panel, realizing the direct conversion of light energy into electrical energy. It can not only power core modules such as tilt measurement and data processing in real time, but also replenish the lithium battery, ensuring the surplus energy storage when there is sufficient sunlight. The lithium battery uses lithium iron phosphate (LiFePO4) batteries, which store and release electrical energy through the oxidation-reduction reaction of the electrode materials. During charging, the DC power output from the solar panel is regulated by the power management chip and flows into the lithium battery. The lithium iron phosphate at the positive electrode accepts electrons and undergoes a reduction reaction, with lithium ions embedding from the positive electrode into the carbon material at the negative electrode, converting electrical energy into chemical energy for storage. In the absence of light, a reverse reaction occurs inside the lithium battery, with lithium ions de-embedding from the negative electrode and returning to the positive electrode, while releasing electrons to form an electric current, converting chemical energy into electrical energy to power each module. This solves the power supply problem in the absence of light, freeing the system from dependence on mains power and making it fully suitable for long-term monitoring needs in outdoor power-free scenarios such as dilapidated buildings and bridges.

[0022] The power management chip is a low-power management chip with static power consumption ≤1μA, and it has battery overcharge protection, over-discharge protection and short circuit protection functions, with protection thresholds of 4.2V, 2.7V and 100mA; Specifically, during charging control, the power management chip monitors the lithium battery voltage in real time. When the voltage is below 3.2V, i.e. undervoltage, it starts constant current charging mode with a charging current of 500mA. When the voltage rises to 4.2V, i.e. the full charge threshold is reached, it automatically switches to constant voltage charging and then stops charging to avoid overcharging that could cause battery bulging and lifespan reduction. During discharge control, when there is no light, the power management chip switches to discharge mode to stabilize the lithium battery voltage at the operating voltage output of each module, such as 3.3V. Linear voltage regulation technology is used to eliminate voltage fluctuations and ensure stable power supply. Overcharge protection: When the lithium battery voltage reaches 4.2V, the internal switching transistor of the power management chip disconnects the charging circuit, preventing further charging; Over-discharge protection: When the lithium battery voltage drops to 2.7V, the discharge circuit is disconnected to prevent the battery from being over-discharged and causing permanent capacity loss; Short circuit protection: When a short circuit occurs at the output terminal, if the current is ≥100mA, the power management chip instantly cuts off the circuit to protect the battery and the circuits of each module from being burned out. When optimizing for low power consumption, select a low-power chip with static power consumption ≤1μA, such as TP4056. When the system is in standby or under low load, the chip's own power consumption is negligible. The system intelligently allocates power, prioritizing power supply to core modules such as tilt measurement and data processing. When the battery is low, it reduces the transmission frequency of the wireless communication module, such as from 5 minutes / time to 15 minutes / time, to extend the battery life.

[0023] When there is sunlight, the solar panels generate electricity through the photovoltaic effect. The power management chip controls the charging circuit to charge the lithium battery, while also diverting some power directly to modules such as tilt measurement and data processing. When there is no sunlight, the power management chip automatically switches to discharge mode, and the lithium battery releases its stored chemical energy. After being regulated and current-limited by the chip, the energy continuously powers the modules. In abnormal conditions, the power management chip monitors the voltage and current in real time. If overcharging, over-discharging, or short circuit occurs, the protection mechanism is immediately triggered to cut off the corresponding circuit, ensuring the safety of the system hardware. The optimized design of the power module ensures a stable power supply for a long time, thereby improving the overall stability and reliability of the system and meeting the requirements for long-term, continuous, and high-precision monitoring.

[0024] To facilitate the installation of the inclinometer, the wireless inclinometer monitoring system also includes an installation structure. The inclinometer measurement module, U-tube automatic calibration module, data processing module, wireless communication module, and power supply module are all installed on the installation structure, integrating inclinometer measurement, U-tube calibration, data processing, wireless communication, and power supply into one unit. It also adapts to the installation requirements of monitoring objects made of different materials, ensuring that the module is firmly installed, the position is stable, and the measurement accuracy is not affected. The installation structure includes a magnetic base for adsorbing onto the surface of the metal monitoring object and a quick-release buckle structure. The magnetic base is embedded with a high-strength permanent magnet, which is a neodymium iron boron magnet with a magnetic attraction strength ≥15N. One end of the quick-release buckle structure is fixed to the surface of the non-metallic monitoring object with strong adhesive. The quick-release buckle structure includes an L-shaped buckle and a slot that mates with the buckle. The slot is located on the inclinometer housing. The gap between the buckle and the slot is ≤0.2mm. The quick-release buckle structure mates with the slot on the inclinometer housing to achieve quick installation and disassembly. With the unique magnetic base and quick-release buckle installation structure, no professional tools or complicated calibration process are required, and ordinary personnel can quickly complete the installation.

[0025] During assembly, the tilt sensor and data processing module are integrated onto a PCB substrate and fixed inside the upper side of the inclinometer housing; a U-shaped tube is installed in the middle of the housing, and the liquid level detection electrode is connected to the ADC interface of the data processing module via DuPont wires; the wireless communication module chip and antenna are installed on the top of the housing, and the radio frequency circuit is connected to the UART interface of the data processing module; the solar panel is attached to the top outer side of the housing, and the lithium battery and power management chip are fixed to the bottom of the housing, providing power to each module via wires; quick-release clips are installed at the preset interface on the bottom of the housing to fix the housing onto the magnetic base, completing the overall assembly; like Figure 2 As shown, during operation, the installation structure is firmly fixed to the system via a magnetic base or quick-release buckle structure according to the tilt change of the monitored object, ensuring that the tilt change is transmitted to the tilt measurement module without loss. The tilt sensor of the tilt measurement module converts the tilt angle into an electrical signal. The U-shaped tube automatic calibration module works simultaneously. Based on the principle of hydrostatics, it calculates the actual tilt angle through changes in the conductive liquid level and the electrode conduction state, meeting the automatic triggering conditions of tilt angle change rate exceeding 0.05° / h or more than 14 days since the last calibration. The data processing module, as the central hub, receives dual-channel data, filters and reduces noise, corrects sensor drift error through a dynamic weighting formula, packages it into standardized JSON data, and then transmits the data to a remote monitoring center, such as a cloud platform, through the LoRa technology of the wireless communication module after anti-interference processing. It also supports command reception. The power module uses a dual power supply mode of solar energy and lithium battery, combined with an intelligent power management chip, to ensure continuous operation in the absence of light. After receiving data, the cloud platform displays and analyzes trends in real time and issues early warnings for anomalies, forming a complete closed loop of perception, processing, transmission, application, and energy supply, which is suitable for long-term monitoring needs in scenarios such as dilapidated buildings and bridges.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wireless inclinometer monitoring system based on automatic calibration using a U-tube, characterized in that: include: The tilt measurement module collects the tilt changes of the monitored object and converts the tilt angle into an electrical signal output. The U-tube automatic calibration module includes a U-tube filled with conductive liquid and multiple liquid level detection electrodes located on both sides of the U-tube. It calculates the actual tilt angle by detecting changes in the liquid level of the conductive liquid, so as to calibrate the test data of the tilt measurement module. The data processing module is used to perform preliminary processing on the data collected by the tilt measurement module, and to correct the tilt measurement results according to the calibration data of the U-tube, so as to obtain accurate tilt angle data. At the same time, the data is packaged and processed. The wireless communication module uses an anti-interference communication protocol and signal enhancement technology to wirelessly transmit the data processed by the data processing module. The power supply module provides power to the tilt measurement module, the U-tube automatic calibration module, the data processing module, and the wireless communication module.

2. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 1, characterized in that: The tilt measurement module includes a tilt sensor, which includes a MEMS tilt sensing chip and a PCB substrate for integrating the MEMS tilt sensing chip. The data processing module is integrated on the PCB substrate.

3. The wireless inclinometer monitoring system based on U-tube automatic calibration according to claim 1, characterized in that: The U-shaped tube is a transparent tube made of rigid material, and multiple liquid level detection electrodes are evenly distributed along the height direction of the U-shaped tube.

4. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 3, characterized in that: The liquid level detection electrode is a platinum electrode or a gold-plated copper electrode, with at least 8 electrodes on each side of the pipe wall, and the distance between adjacent electrodes is 5-10 mm.

5. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 4, characterized in that: The conductive liquid is conductive silicone oil or a 5%-10% lithium chloride aqueous solution, with a conductivity of 10-100 mS / cm at 25°C.

6. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 5, characterized in that: The data processing module includes a programmable microcontroller that processes tilt measurement data and corrects data based on U-tube calibration data by writing data processing and calibration programs in the microcontroller.

7. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 6, characterized in that: The power module includes a solar panel, a rechargeable lithium battery, and a power management chip. The power management chip is electrically connected to the solar panel and the lithium battery. When there is sunlight, the solar panel converts light energy into electrical energy to supply power and charge the lithium battery. When there is no sunlight, the lithium battery supplies power.

8. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 7, characterized in that: The wireless communication module includes a communication chip, an antenna, and a radio frequency circuit that employ low-power wide-area network communication. The communication chip is electrically connected to the antenna and the radio frequency circuit, respectively, and wirelessly transmits the tilt angle data packaged by the data processing module to the remote monitoring center, and receives control commands sent by the remote monitoring center to achieve two-way communication.

9. The wireless inclinometer monitoring system based on automatic calibration of a U-tube according to any one of claims 1-8, characterized in that: It also includes an installation structure, on which the tilt measurement module, U-tube automatic calibration module, data processing module, wireless communication module and power supply module are all installed.

10. The wireless inclinometer monitoring system based on automatic calibration of a U-tube as described in claim 9, characterized in that: The installation structure includes a magnetic base for adsorbing onto the surface of a metal monitoring object and a quick-release buckle structure. A high-strength permanent magnet is embedded inside the magnetic base, and one end of the quick-release buckle structure is fixed to the surface of a non-metallic monitoring object with strong adhesive.

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