A dual-distance monitoring system for object displacement or deformation

Abstract

A dual-distance measurement system for monitoring the displacement or deformation of an object includes multiple positioning monitoring devices respectively arranged at multiple object monitoring points. The positioning monitoring devices include a wireless ranging transceiver module, an optical ranging transceiver module, a processing module, and an alarm module. The wireless ranging transceiver module performs wireless ranging of the distance between each object monitoring point, and the optical ranging transceiver module performs optical ranging of the distance between each object monitoring point. When both the wireless ranging and the optical ranging between the object monitoring points show changes relative to a preset reference distance, the processing module determines that the corresponding object has been displaced or deformed, triggers the alarm module to issue an alarm, and measures the displacement or deformation data through wireless ranging. This system can not only ensure accurate measurement of whether an object has been displaced or deformed, but also solves the problem that optical ranging is difficult to determine the amount of displacement / deformation. In addition, it improves the accuracy of object monitoring, greatly reduces false alarms, and reduces labor costs.

Description

Technical Field

[0001] The invention relates to a dual-distance measuring system for monitoring the displacement or deformation of an object. Background Art

[0002] Traditional methods for measuring / monitoring object distance / deformation include optical measurement, radio wave ranging, WIFI, Zigbee positioning, etc. Optical measurement uses a light beam to achieve precise positioning monitoring, but it can only monitor whether an object has been displaced / deformed, but it is difficult to measure the amount of displacement / deformation after the object has been displaced / deformed. Although radio wave ranging can measure the distance change between objects, it cannot achieve accurate object positioning monitoring. WIFI and Zigbee positioning have short transmission distances and cannot achieve long-distance monitoring and outdoor monitoring. At the same time, the above methods also have problems such as inaccurate measurement data, easy to cause false alarms, and increased manual workload. For traditional radio wave ranging, please refer to patent document CN104297745B, which discloses a ranging device, ranging method, and positioning method based on radio wave wavelength. Patent document CN106154261A discloses a radio ranging and speed measurement sensor using visible light identification, which introduces visible light into the radio ranging measurement in order to achieve visibility of the operating target. Patent document CN206697012U discloses a laser-based landslide deformation monitoring and early warning system. This system utilizes a laser beam, which is susceptible to interference from external light and can cause false alarms due to abnormalities such as equipment damage and animals blocking the laser signal, increasing manual workload. Furthermore, because the laser beam relies on reflection for transmission, it suffers from significant attenuation, resulting in a short optical transmission distance and inability to achieve long-range, wide-area monitoring. Summary of the Invention

[0003] The main purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and to provide a system for monitoring the displacement or deformation of an object by combining a dual ranging method of radio waves and optical signals.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A dual-distance measurement system for monitoring the displacement or deformation of an object includes multiple positioning monitoring devices, each of which is arranged at a plurality of object monitoring points. The positioning monitoring devices include a wireless ranging transceiver module, an optical ranging transceiver module, a processing module, and an alarm module. The processing module is connected to the wireless ranging transceiver module, the optical ranging transceiver module, and the alarm module, respectively. The wireless ranging transceiver module is used to measure the distance between each object monitoring point using radio waves, and the optical ranging transceiver module is used to measure the distance between each object monitoring point using optical signals. When both the wireless ranging results and the optical ranging results between the object monitoring points show a change relative to a preset reference distance, the processing module determines that the corresponding object has moved or a corresponding part of the object has deformed, triggers the alarm module to issue an alarm signal, and measures displacement or deformation data through wireless ranging.

[0006] Further:

[0007] The multiple positioning monitoring devices are more than three positioning monitoring devices. When the processing module determines that the corresponding object has moved or the corresponding part of the object has deformed, it measures the distance / amplitude and direction of the object displacement or object deformation through wireless positioning technology.

[0008] When only one of the wireless ranging result and the optical ranging result between the object monitoring points changes relative to the preset reference distance, the processing module determines that the object at the corresponding object monitoring point has been displaced or deformed or the ranging has been abnormally interrupted, triggering the alarm module to send a warning signal.

[0009] The processing module includes a data modulation / demodulation circuit for modulating / demodulating wireless ranging data or optical ranging data for wireless transmission / reception.

[0010] The processing module includes a clock synchronization circuit for implementing clock synchronization calibration.

[0011] It also includes a communication module for sending the alarm signal and / or the displacement or deformation data to a management center or a user terminal, and the communication module includes a wired and / or wireless communication module.

[0012] The multiple positioning monitoring devices are connected to form a cross-region and cross-domain networking system, and cross-region and cross-domain monitoring and management are achieved through a cloud server.

[0013] It also includes a power supply device for supplying power to the positioning monitoring device, and the power supply device includes one or more of a solar power generation device, a wind power generation device and a battery.

[0014] The optical ranging is visible light or invisible light ranging, and the wireless ranging is wireless carrier or wireless pulse communication ranging.

[0015] The optical ranging is laser ranging or infrared ranging.

[0016] The present invention has the following beneficial effects:

[0017] The present invention provides a dual-distance measurement system for monitoring object displacement or deformation, comprising a positioning monitoring device installed at multiple object monitoring points. The positioning monitoring device includes a wireless ranging transceiver module, an optical ranging transceiver module, a processing module, and an alarm module. The wireless ranging transceiver module measures the distance between each object monitoring point, while the optical ranging transceiver module also measures the distance between each object monitoring point. When both the wireless ranging and optical ranging between the object monitoring points show a change relative to a preset reference distance, the processing module determines that the corresponding object has moved or a corresponding portion of the object has deformed, triggering the alarm module to issue an alarm and measure displacement or deformation data via wireless ranging. Because the present invention utilizes a dual ranging method combining optical ranging and wireless electromagnetic wave ranging, on the one hand, the reference distance and precise laser positioning are used to determine the position of the object, ensuring accurate measurement of whether the object has moved or deformed. On the other hand, when the object moves or deforms, the displacement / deformation data can be measured via radio wave ranging, thereby overcoming the disadvantage of optical precise positioning methods that make it difficult to determine displacement / deformation data after the object shifts or deforms. Moreover, the processing module triggers the alarm module to issue an alarm only when both the wireless ranging results and the optical ranging results between the object monitoring points show changes relative to the preset reference distance, forming a dual ranging interruption alarm mechanism. That is, the system will only issue a displacement or deformation alarm when the dual ranging methods simultaneously measure displacement or deformation, which greatly reduces false alarms of the monitoring system, improves the accuracy of object monitoring, and reduces the cost of manual response.

[0018] In a preferred embodiment, when an alarm is generated, the distance / amplitude and direction of the object's position offset or deformation can also be determined through the radio wave ranging technology in the dual ranging, and can be sent to the management center or user terminal and viewed in real time through the management software.

[0019] In a preferred embodiment, a single ranging warning mechanism can be implemented on the basis of dual ranging. When only one of the wireless ranging result and the optical ranging result between the object monitoring points changes relative to the preset reference distance, it is determined that the object at the corresponding object monitoring point has been displaced or deformed or the ranging has been abnormally interrupted, triggering the alarm module to issue a warning signal, thereby eliminating the disadvantage that the traditional single wireless ranging or optical ranging method early warning / alarm is prone to missed reports. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Schematic diagram of the system structure for monitoring the displacement or deformation of an object using dual ranging according to an embodiment of the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of optical positioning transmission of the system shown.

[0022] Figure 3 for Figure 1 Schematic diagram of wireless transmission of the system shown.

[0023] Figure 4 The figure is a schematic block diagram of a positioning monitoring device and its wireless carrier communication in one embodiment of the present invention.

[0024] Figure 5 The figure is a schematic block diagram of a positioning monitoring device and its laser transceiver communication in one embodiment of the present invention.

[0025] Figures 6 to 8 This is the principle diagram of the trilateration positioning method. DETAILED DESCRIPTION

[0026] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present invention and its application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and coupling or communication.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0030] See Figures 1 to 5 An embodiment of the present invention provides a dual-distance measurement system for monitoring the displacement or deformation of an object, comprising multiple positioning monitoring devices 1, each of which is disposed at a plurality of monitoring points on the object. It is understood that when the object to be monitored is displacement, the multiple positioning monitoring devices 1 are disposed on different objects; when the object to be monitored is deformation, the multiple positioning monitoring devices 1 are disposed on different parts of the object (e.g., at different locations on a dam, bridge, mountain, or other object). The positioning monitoring device 1 includes a wireless ranging transceiver module, an optical ranging transceiver module, a processing module (such as a microprocessor MCU) and an alarm module. The processing module is connected to the wireless ranging transceiver module, the optical ranging transceiver module and the alarm module respectively. The wireless ranging transceiver module is used to measure the distance between each object monitoring point through radio waves, and the optical ranging transceiver module is used to measure the distance between each object monitoring point through optical signals. When the wireless ranging results and the optical ranging results between the object monitoring points both show changes relative to a preset reference distance, the processing module determines that the corresponding object has moved or the corresponding part of the object has deformed, triggering the alarm module to issue an alarm and measure the displacement or deformation data through wireless ranging. It can be understood that the changes in the wireless ranging or optical ranging results relative to the preset reference distance include abnormal conditions that cannot be measured.

[0031] Because the embodiments of the present invention utilize a dual ranging method combining optical ranging and radio electromagnetic wave ranging, on the one hand, laser precision positioning is used to determine the position of an object, ensuring accurate measurement of whether the object has moved or deformed. On the other hand, when the object moves or deforms, displacement / deformation data can be measured using radio wave ranging, thereby resolving the shortcoming of optical precision positioning methods, which makes it difficult to determine displacement / deformation data after the object's position shifts or deformation occurs. Furthermore, the processing module triggers the alarm module to issue an alarm only when both the wireless ranging results and the optical ranging results between the object's monitoring points show a change relative to a preset reference distance, thus forming a dual ranging interrupt alarm mechanism. That is, the system only issues a displacement or deformation alarm when both the wireless ranging and optical ranging results simultaneously measure displacement or deformation. This significantly reduces false alarms in the monitoring system, improves the accuracy of object monitoring, and reduces manual response costs.

[0032] In a preferred embodiment, the plurality of positioning monitoring devices 1 are three or more positioning monitoring devices 1 (eg Figures 1 to 3 Shown are five positioning monitoring devices 1). When the processing module determines that the corresponding object has moved or the corresponding part of the object has deformed, it measures the distance / amplitude and direction of the object displacement or deformation through wireless positioning technology.

[0033] In the event that dual ranging generates an alarm, the distance / amplitude and direction of the object's position offset or deformation can also be determined through the radio wave ranging technology in the dual ranging, and can be further sent to the management center or user terminal and viewed in real time through the management software.

[0034] In a preferred embodiment, when only one of the wireless ranging result and the optical ranging result between the object monitoring points changes relative to the preset reference distance, the processing module determines that the object at the corresponding object monitoring point has been displaced or deformed or the ranging has been abnormally interrupted, triggering the alarm module to issue a warning signal.

[0035] A single ranging warning mechanism can be implemented based on dual ranging. When only one of the wireless ranging results and the optical ranging results between object monitoring points changes relative to a preset reference distance, it is determined that the object at the corresponding object monitoring point has been displaced or deformed, or that the ranging has been abnormally interrupted, triggering the alarm module to issue a warning signal, thereby eliminating the disadvantage of the traditional single wireless ranging or optical ranging method of early warning / alarm being prone to missed reports.

[0036] In a preferred embodiment, the processing module includes a data modulation / demodulation circuit for modulating / demodulating wireless ranging data or optical ranging data for wireless transmission / reception.

[0037] In a preferred embodiment, the processing module comprises a clock synchronization circuit for implementing clock synchronization calibration.

[0038] In a preferred embodiment, the system further comprises a communication module for sending the alarm signal, the early warning signal and / or the displacement or deformation data to a management center or a user terminal.

[0039] The communication module may include a wired and / or wireless communication module.

[0040] In a preferred embodiment, the multiple positioning monitoring devices 1 are connected to a network to form a cross-region and cross-domain networking system, and cross-region and cross-domain monitoring and management are achieved through a cloud server.

[0041] In a preferred embodiment, the system further comprises a power supply device for supplying power to the positioning monitoring device 1 , wherein the power supply device comprises one or more of a solar power generation device, a wind power generation device and a battery.

[0042] In a preferred embodiment, the optical ranging is visible light or invisible light ranging, and the wireless ranging is wireless carrier or wireless pulse communication ranging.

[0043] In a preferred embodiment, the optical ranging is laser ranging or infrared ranging.

[0044] The specific embodiments of the present invention are further described below with reference to the accompanying drawings.

[0045] See Figures 1 to 5 In some specific embodiments, the positioning monitoring devices that implement wireless and optical ranging in this system can use an integrated control device, also known as a positioning data controller. Each positioning data controller includes a microprocessor, wireless transceiver circuitry, data modulation / demodulation circuitry, time calibration / synchronization circuitry, laser transceiver circuitry, power supply circuitry, and alarm output circuitry.

[0046] The main functions of the location data controller include:

[0047] The original positioning precision data (including the distance between the relevant positioning controllers involved in the measurement) is written to the microprocessor (MCU) memory to provide a reference distance for optical ranging and radio wave ranging. When the radio wave and optical ranging change from the reference distance, early warnings and alarms can be triggered and viewed in real time. The data measured by the optical ranging and radio wave ranging devices are calculated by the microprocessor (MCU) to obtain the distance results, which are compared with the reference distance. When one set of data changes, an early warning signal is issued to notify the management center or on-site early warning signal output. If the two sets of measurement data (optical ranging and radio wave ranging) change at the same time, the highest level alarm is issued. Alarm output can also be made via wireless network, wired network and local alarm output.

[0048] The positioning data controller adopts address encoding and clock synchronization calibration.

[0049] The positioning data controller can control wireless data transmission and reception, as well as wired communication with local devices.

[0050] Data can be exchanged between positioning data controllers at different object monitoring points via wired or wireless networks. The controller's microprocessor (MCU) has independent optical and wireless ranging calculations, displacement judgment, and on-site alarm functions. Single-point interruption warnings and dual-range beam interruption alarms can be installed.

[0051] Preferably, there are three or more positioning data controllers. Positioning data controllers at different object monitoring points can be networked, cross-regional, and cross-domain networking systems to perform local or remote monitoring of two, multiple, or countless points.

[0052] This system can monitor single, multiple, or an unlimited number of objects simultaneously, connected via a network (wired and wireless), and monitored from a management center or mobile app. Data can also be uploaded to a cloud server, enabling cross-regional and cross-domain monitoring and management. If both optical and wireless ranging are interrupted, the system issues a maximum alarm signal, which can trigger notifications to the management center, mobile app, text messages, and phone calls to administrators. This early warning device can operate standalone (not connected to the internet). System points can be powered by solar or wind power generation and stored electricity.

[0053] In different embodiments, optical ranging can be performed using visible light such as laser or invisible light such as infrared. Laser point-to-point relay bidirectional ranging transmission can achieve a longer optical transmission distance.

[0054] Wireless positioning and ranging can be wireless carrier and wireless pulse communication ranging.

[0055] Commonly used wireless positioning methods include: signal strength analysis (RSS), angle of arrival (AOA), time of arrival (TOA), time difference of arrival (TDOA) and three-dimensional positioning.

[0056] Various positioning methods are applicable to the displacement positioning system, and the present invention does not impose any limitation on the positioning method.

[0057] 1. Optical distance measurement calculation method of wireless distance measurement controller

[0058] This technology uses two-way ranging, which uses the time difference between transmission and reception between two controllers to measure the distance between them. We denote the packet sent by the sender as "T1," the packet received by the receiver and the response packet as "T2," and the time it takes for the packet to travel as "TT0."

[0059] Calculation method:

[0060] Data packet transmission time: TT O =(T1-T2)÷2

[0061] The distance between controllers can be measured by the electromagnetic wave transmission speed: D = C × TT O (C is the speed of light)

[0062] Controller clock synchronization calibration. The controller reception and response time needs to be considered, which depends on the controller debugging parameters.

[0063] 2. Wireless positioning algorithm for more than three controllers

[0064] TDOA positioning is a positioning method that uses time difference. The time it takes for communication packets between the positioning controllers to arrive at the station can be used to determine the distance between them. The position of the positioning controller can be determined by measuring the distance from the positioning controller to each monitoring point controller (using a circle with the main controller as the center and the distance as the radius). By comparing the time differences at each controller, a hyperbola can be constructed with the main controller as the center and the distance difference as the major axis. The intersection of the hyperbolas indicates the signal location.

[0065] Wireless data controller A periodically sends a "broadcast" query packet, including a time synchronization command. Because A-1, A-2, A-3, and A-4 are at different distances from T1, the received times vary slightly, and the timestamps are recorded. Since the times of A-1, A-2, A-3, and A-4 are wirelessly synchronized with the master controller and are comparable, they are sent to the master controller or a local computer for position calculation. Technically, after receiving data from each positioning controller, the master controller performs distance and position calculations.

[0066] 3. Using geometric positioning formulas, we take the commonly used trilateration positioning algorithm as an example:

[0067] The trilateration method is suitable for locating an unknown node using three reference nodes. It lists three mathematical relationships based on the distance formula between the unknown node and the reference node, and then solves the coordinates of the node to be located. The principle of trilateration positioning method is as follows: Figure 6 The position calculation principle of unknown nodes is as follows: Figure 7 shown. Figure 6 In the equation, the distances between A / B / C are known, and the displacement distance of D is unknown. Assume that the coordinates of the three reference nodes are A(x1, y1), B(x2, y2), and C(x3, y3), and the coordinates of the unknown node D are (x, y). The distances from this node to A, B, and C are r1, r2, and r3, respectively. The following equation can be obtained:

[0068] (x-x1) 2 +(y-y1) 2 =r1 2

[0069] (x-x2) 2 +(y-y2) 2 =r2 2

[0070] (x-x3) 2 +(y-y3) 2 =r3 2

[0071] There are many algorithms for finding the horizontal / vertical coordinates of the D displacement.

[0072] Further derive the solution.

[0073] Suppose the position of the unknown point is (x, y), let the center coordinates of the first sphere P1 be (0, 0), P2 is at the same vertical coordinate, the center coordinates are (d, 0), the center coordinates of P3 are (i, j), the radii of the three spheres are r1, r2, and r3 respectively, and z is the height of the intersection point of the three spheres and the horizontal plane.

[0074] Then we have:

[0075] r1 2 =x 2 +y 2 +z 2

[0076] r2 2 =(xd) 2 +y 2 +z 2

[0077] r3 2 =(xi) 2 +(yj) 2 +z 2

[0078] When z = 0, the three circles intersect at one point on the horizontal plane. First, solve for x:

[0079] x=(r1 2 -r2 2 +d 2 )÷2d

[0080] The calculation method of y is as follows:

[0081] y=(r1 2 -r3 2 -x 2 +(xi) 2 +j 2 )÷2j.

[0082] In actual environments, the measurement signal will be affected by environmental factors such as occlusion and noise, which will increase the measurement time and produce measurement errors. The three circles can form an intersection area, such as Figure 8 As shown (D / E / F / G unknown points).

[0083] Assume that the coordinates of the three intersection points are E(x4, y4), F(x5, y5), and G(x3, y3). The coordinates (x, y) of the position node D can be regarded as the geometric center of the intersection area, that is, the coordinates of D are

[0084] x=(x 4+ x 5+ x3)÷3y=(y4+y5+y3)÷3.

[0085] In different embodiments, the positioning data controller can employ a variety of known distance measurement algorithms and a variety of data comparison methods to achieve precise object positioning. The collected data can be remotely monitored and managed through wireless network technology, such as networking with a cloud server, or through a wired or wireless network connected to a local server, and then through management positioning software. During positioning monitoring, the direction of movement and offset distance of the monitored object can be intuitively viewed through the software's electronic map format. While measuring displacement, displacement monitoring of the object's rise and fall can also be achieved. The positioning data controller can provide real-time data and communicate with the management computer, and electronic maps can be created in the management software for convenient management and viewing. Measurement data can be sent in real time to computers, mobile phones, or other communication devices for real-time viewing of monitoring data and shape and structure. The system can be a single machine (two or more) and can be networked across regions and domains to monitor objects. The number of positioning data controllers can be adjusted according to different on-site environments and measurement requirements. In areas where electricity is unavailable, wind power, solar power, or batteries can be used for power supply.

[0086] The background section of the present invention may contain background information about the problem or environment of the present invention, but does not necessarily describe the prior art. Therefore, the inclusion of content in the background section is not an admission by the applicant that the prior art is present.

[0087] The above description further details the present invention in conjunction with specific / preferred embodiments, and the specific implementation of the present invention should not be construed as being limited to these descriptions. Persons skilled in the art will appreciate that, without departing from the spirit of the present invention, they may make various substitutions or modifications to the described embodiments, and these substitutions or modifications should be considered to fall within the scope of protection of the present invention. Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples" indicates that the specific features, structures, materials, or characteristics described in conjunction with such embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Persons skilled in the art may combine and assemble the different embodiments or examples described in this specification, as well as features of different embodiments or examples, without conflicting opinions. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications may be made herein without departing from the scope of protection of the patent application.

Claims

1. A dual-distance monitoring system for object displacement or deformation, characterized in that: The invention comprises a plurality of positioning monitoring devices, wherein the plurality of positioning monitoring devices are respectively arranged at a plurality of object monitoring points, the positioning monitoring device comprises a wireless ranging transceiver module, an optical ranging transceiver module, a processing module and an alarm module, the processing module is respectively connected to the wireless ranging transceiver module, the optical ranging transceiver module and the alarm module, the wireless ranging transceiver module is used to measure the distance between each object monitoring point by radio waves, the optical ranging transceiver module is used to measure the distance between each object monitoring point by laser signals, wherein the position of the object is determined by using the reference distance and the precise positioning of the laser to ensure accurate measurement of whether the object has moved or deformed, and the processing module is used to determine the position of the object by using the reference distance and the precise positioning of the laser. When the position of the object is determined to have moved or the object is deformed, the displacement / deformation data is further measured by radio wave ranging; when the wireless ranging results and the optical ranging results between the object monitoring points both show changes relative to the preset reference distance, the processing module determines that the corresponding object has moved or the corresponding part of the object has been deformed, triggers the alarm module to send an alarm signal, and measures the displacement or deformation data by wireless ranging, wherein the multiple positioning monitoring devices are more than three positioning monitoring devices, and when the processing module determines that the corresponding object has moved or the corresponding part of the object has been deformed, it measures the distance / amplitude and direction of the object displacement or deformation by wireless positioning technology.

2. The system according to claim 1, wherein When only one of the wireless ranging result and the optical ranging result between the object monitoring points changes relative to the preset reference distance, the processing module determines that the object at the corresponding object monitoring point has been displaced or deformed or the ranging has been abnormal, triggering the alarm module to send a warning signal.

3. The system according to claim 1, wherein: The processing module includes a data modulation / demodulation circuit for modulating / demodulating wireless ranging data or optical ranging data for wireless transmission / reception.

4. The system according to claim 1, wherein: The processing module includes a clock synchronization circuit for implementing clock synchronization calibration.

5. The system according to claim 1, wherein: It also includes a communication module for sending the alarm signal and / or the displacement or deformation data to a management center or a user terminal, and the communication module includes a wired and / or wireless communication module.

6. The system according to claim 1, wherein: The multiple positioning monitoring devices are connected to a network to form a cross-region and cross-domain networking system, and cross-region and cross-domain monitoring and management are achieved through a cloud server.

7. The system according to claim 1, wherein: It also includes a power supply device for supplying power to the positioning monitoring device, and the power supply device includes one or more of a solar power generation device, a wind power generation device and a battery.

8. The system according to claim 1, wherein: The wireless ranging is wireless carrier or wireless pulse communication ranging.

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