Multi-point non-contact displacement monitoring device based on PLC control

Abstract

The utility model relates to the technical field of displacement monitoring, and particularly discloses a multi-point non-contact displacement monitoring device based on PLC control, which comprises a motion control rotating mechanism, a displacement sensor, a reflector, a TCP / IP communication module, a PLC data acquisition and analysis module and a motion control positioning module, and is characterized in that the motion control rotating mechanism is arranged at a monitoring base point; the displacement sensor is connected with one end of the motion control rotating mechanism; the reflecting plate is arranged at a monitoring point, faces the displacement sensor and is used for reflecting the laser pulse emitted by the displacement sensor; one end of the TCP / IP communication module is electrically connected with the displacement sensor, and the other end of the TCP / IP communication module is electrically connected with the PLC data acquisition and analysis module; the motion control positioning module is electrically connected with the PLC data acquisition and analysis module and the motion control rotating mechanism.

Description

Technical Field

[0001] The present application relates to the field of displacement monitoring technology, and in particular to a multi-point non-contact displacement monitoring device based on PLC control. Background Art

[0002] In the traditional field of displacement monitoring, data collection and analysis mainly rely on contact sensors (such as wire displacement sensors, mechanical displacement meters) or manual inspections. These methods have many limitations: contact sensors are susceptible to environmental erosion and mechanical wear, resulting in reduced measurement accuracy; manual inspections are not only inefficient, but also difficult to achieve real-time monitoring of a large number of monitoring points, especially in bad weather or remote areas, and the manpower and material costs are high. In addition, traditional monitoring methods are often unable to effectively respond to data collection needs under complex terrain and harsh climatic conditions, limiting their widespread application in large-scale infrastructure monitoring. Summary of the invention

[0003] The purpose of the present application is to provide a multi-point non-contact displacement monitoring device based on PLC control, so as to solve the problem that the contact sensor in the prior art is easily affected by environmental erosion and mechanical wear, resulting in a decrease in measurement accuracy; manual inspection is not only inefficient, but also difficult to achieve real-time monitoring of a large number of monitoring points, especially in bad weather or remote areas, the manpower and material costs are high; in addition, traditional monitoring methods are often unable to effectively respond to data collection needs under complex terrain and harsh climatic conditions, limiting their widespread application in large-scale infrastructure monitoring.

[0004] To achieve the above-mentioned purpose, the embodiment of the present application provides a multi-point non-contact displacement monitoring device based on PLC control, including: a motion control rotation mechanism, a displacement sensor, a reflector, a TCP / IP communication module, a PLC data acquisition and analysis module, and a motion control positioning module, wherein:

[0005] The motion control rotation mechanism is arranged at a monitoring base point;

[0006] The displacement sensor is connected to one end of the motion control rotating mechanism;

[0007] The reflector is arranged at the monitoring point and faces the displacement sensor, and is used to reflect the laser pulse emitted by the displacement sensor;

[0008] One end of the TCP / IP communication module is electrically connected to the displacement sensor, and the other end is electrically connected to the PLC data acquisition and analysis module;

[0009] The motion control positioning module is electrically connected to the PLC data acquisition and analysis module and the motion control rotating mechanism respectively.

[0010] Optionally, the motion control rotation mechanism includes a motor, a reducer, a coupling, a spindle, and a position sensor, wherein the motor is a stepper motor or a servo motor, the motor output end is connected to the reducer, the coupling is respectively connected to the motor output shaft and one end of the spindle, and the other end of the spindle is connected to the displacement sensor, and the position sensor is used to monitor the rotation position and speed of the spindle in real time.

[0011] Optionally, a diamond-grade reflective film is provided on a side of the reflective plate facing the displacement sensor, and one end of the reflective plate is connected to the monitoring point via a mounting bracket and a pre-embedded connector.

[0012] Optionally, the early warning module is electrically connected to the PLC data acquisition and analysis module, and is used to receive instructions from the PLC data acquisition and analysis module and issue an early warning when the displacement of the monitoring point exceeds a preset value.

[0013] Optionally, the HMI display module is electrically connected to the PLC data acquisition and analysis module, and is used to interact with the PLC data acquisition and analysis module and display the measured distance value of the monitoring point.

[0014] The embodiments of the present application have the following advantages:

[0015] An embodiment of the present application provides a multi-point non-contact displacement monitoring device based on PLC control, including: a motion control rotation mechanism, a displacement sensor, a reflector, a TCP / IP communication module, a PLC data acquisition and analysis module, and a motion control positioning module, wherein the motion control rotation mechanism is arranged at a monitoring base point; the displacement sensor is connected to one end of the motion control rotation mechanism; the reflector is arranged at the monitoring point and faces the displacement sensor to reflect the laser pulse emitted by the displacement sensor; one end of the TCP / IP communication module is electrically connected to the displacement sensor, and the other end is electrically connected to the PLC data acquisition and analysis module; the motion control positioning module is electrically connected to the PLC data acquisition and analysis module and the motion control rotation mechanism, respectively.

[0016] Compared with the prior art, the scheme of the present application can obtain the displacement change and displacement change law of a single-point monitored point or multiple-point monitored points relative to a fixed point (monitoring base point), compare and analyze the distance value data change collected on site, evaluate the danger level of the monitored part and then carry out danger warning, effectively improve the reliability of monitoring and engineering practicality, and have strong promotion and application value. The multi-point non-contact displacement monitoring device controlled by PLC provided by the present application has fast and efficient communication, is not restricted by geographical environment, climate and other factors, data can be automatically monitored and transmitted remotely in real time, has low power consumption, simple structure, stable and reliable system, convenient operation and practical value. It can be used for monitoring of large, medium and small reservoir projects, dam slope projects, bridge and tunnel projects, etc. It not only solves the problem of high cost of monitoring manpower and vehicles, but also alleviates the problem of difficult power supply on site, is beneficial to environmental protection, and has significant social benefits and technical and economic benefits. This solves the problem that contact sensors in the existing technology are easily affected by environmental erosion and mechanical wear, resulting in reduced measurement accuracy; manual inspections are not only inefficient, but also difficult to achieve real-time monitoring of a large number of monitoring points, especially in severe weather or remote areas, and the manpower and material costs are high; in addition, traditional monitoring methods are often unable to effectively respond to data collection needs under complex terrain and harsh climatic conditions, limiting their widespread application in large-scale infrastructure monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 A structural block diagram of a multi-point non-contact displacement monitoring device based on PLC control provided in at least one embodiment of the present application;

[0019] Figure 2 A schematic diagram of the installation structure of a multi-point non-contact displacement monitoring device based on PLC control provided in at least one embodiment of the present application. DETAILED DESCRIPTION

[0020] The following is a description of the implementation of the present application by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] The present application provides a multi-point non-contact displacement monitoring device based on PLC control, referring to Figure 1 to Figure 2 ,include:

[0024] Motion control rotating mechanism 3, displacement sensor 2, reflector 5, TCP / IP communication module, PLC data acquisition and analysis module, motion control positioning module, wherein:

[0025] The motion control rotating mechanism 3 is arranged at the monitoring base point 1. In some embodiments, one end of the motion control rotating mechanism 3 is connected to the monitoring base point 1 through a mechanical connection base 4, and the other end of the motion control rotating mechanism 3 is connected to the displacement sensor 2, so as to drive the displacement sensor 2 to rotate through relative rotation between the two ends;

[0026] Specifically, the motion control rotating mechanism 3 integrates a high-precision stepper motor or servo motor, and realizes precise rotation angle and speed control through PLC programming. Combined with the motion control positioning module, the displacement sensor 2 realizes automatic scanning and measurement of multiple preset monitoring points 6.

[0027] In some embodiments, the motion control rotation mechanism 3 includes a motor, a reducer, a coupling, a spindle, and a position sensor, wherein the motor is a stepper motor or a servo motor, the motor output end is connected to the reducer, the coupling is respectively connected to the motor output shaft and one end of the spindle, and the other end of the spindle is connected to the displacement sensor 2, and the position sensor is used to monitor the rotation position and speed of the spindle in real time.

[0028] Specifically, the motor is usually a stepper motor or a servo motor, both of which can achieve precise rotation angle and speed control. According to the load to be driven (such as the weight and rotation resistance of the displacement sensor 2) and the expected rotation speed and acceleration, select the appropriate motor power and torque. In order to increase the torque or reduce the rotation speed, a reducer can be connected to the output end of the motor. The reducer can be a gear reducer, a worm gear reducer, etc., and the specific type depends on the application requirements. The coupling is used to connect the motor output shaft and the main shaft of the rotating mechanism to ensure the coaxiality and torque transmission efficiency between the two. The main shaft is usually made of high-strength, wear-resistant materials such as stainless steel or alloy steel. In some embodiments, the main shaft is installed in the housing of the rotating mechanism through bearings or sliding bearings to ensure its stable rotation. In order to achieve more precise position control, a position sensor (such as an encoder or a proximity switch) may be installed on the rotating mechanism to monitor the rotation position and speed of the main shaft in real time. The motor driver is electrically connected to the motion control positioning module. The motor driver controls the operation of the motor according to the instructions of the PLC, including starting, stopping, accelerating, decelerating and changing the direction of rotation.

[0029] The displacement sensor 2 is connected to one end of the motion control rotating mechanism 3. The displacement sensor 2 is used to emit laser pulses to the monitoring point 6. After the receiving unit of the displacement sensor 2 obtains the echo, it statistically analyzes the echoes of multiple laser pulses to calculate the distance value.

[0030] Specifically, the displacement sensor 2 uses advanced laser pulse distance measurement technology, combined with a precise optical system and signal processing algorithm, to improve the accuracy and stability of displacement measurement. At the same time, it supports multiple measurement modes (such as single pulse, statistical pulse flight time, etc.) to meet the measurement needs in different scenarios. In the measurement of the distance value between the monitoring base point 1 and the monitoring point 6, the displacement sensor 2 emits a short light pulse, which is partially reflected by the monitoring point 6. The displacement sensor 2 determines the time difference between the transmitted and received pulses and calculates the distance between the displacement sensor 2 and the monitoring point 6. Pulse flight time measurement is divided into deterministic methods and statistical methods. In a deterministic pulse flight time system ("single pulse"), the displacement sensor 2 emits a single laser pulse and determines the distance value based on the flight time of each pulse. The statistical pulse flight time system emits a series of pulses in the shortest time. The distance value is calculated by a statistical method based on a series of received echoes. Therefore, even if one or more echoes in a series are lost due to interference on the measurement path, the effective distance value can be determined with high measurement reliability. In some embodiments, the displacement sensor 2 uses SICK's HDDM+ optical sensor.

[0031] The reflector 5 is arranged at the monitoring point 6 and faces the displacement sensor 2, and is used to reflect the laser pulse emitted by the displacement sensor 2;

[0032] Specifically, a diamond-grade reflective film is provided on a side of the reflective plate 5 facing the displacement sensor 2 , and one end of the reflective plate 5 is connected to the monitoring point 6 via a mounting bracket 7 and a pre-embedded connector 8 .

[0033] One end of the TCP / IP communication module is electrically connected to the displacement sensor 2, and the other end is electrically connected to the PLC data acquisition and analysis module. The PLC data acquisition and analysis module is used to obtain the distance value obtained by the displacement sensor 2, and perform statistical analysis on the distance values ​​measured at different times corresponding to each monitoring point 6, so as to realize the monitoring of the displacement of the monitoring point 6;

[0034] Specifically, the PLC data acquisition and analysis module has a built-in powerful data processing chip and algorithm library, supporting real-time data acquisition, filtering, calibration, statistical analysis and other functions. It can automatically identify and eliminate abnormal data to improve data quality. At the same time, it supports remote data transmission to the cloud server or local monitoring center to achieve centralized data management and analysis.

[0035] The motion control positioning module is electrically connected to the PLC data acquisition and analysis module and the motion control rotating mechanism 3 respectively, and is used to control the motion control rotating mechanism 3 to rotate based on the instructions of the PLC data acquisition and analysis module, thereby driving the displacement sensor 2 to measure the distance values ​​of monitoring points 6 at multiple different positions.

[0036] In some embodiments, an early warning module is also included, and the early warning module is electrically connected to the PLC data acquisition and analysis module, and is used to receive instructions from the PLC data acquisition and analysis module and issue an early warning when the displacement of the monitoring point 6 exceeds a preset value;

[0037] Specifically, the early warning module integrates multiple early warning methods (such as sound and light alarm, SMS notification, email alarm, etc.), and can automatically trigger early warning according to the displacement change of monitoring point 6. It supports customizing early warning thresholds and early warning strategies through the PLC data acquisition and analysis module to meet the needs of different application scenarios.

[0038] In some embodiments, an HMI display module is further included, the HMI display module being electrically connected to the PLC data acquisition and analysis module, and being used to interact with the PLC data acquisition and analysis module and display the measured distance value of the monitoring point 6;

[0039] Specifically, the HMI display module adopts a high-definition touch screen design, providing an intuitive operation interface and rich information display functions. It supports real-time monitoring data, historical data query, alarm record viewing and other functions, making it convenient for users to operate equipment and analyze data.

[0040] Except for the early warning module and the PLC data acquisition and analysis module, which are electrically connected by signal lines, the remaining modules are electrically connected by TCP / IP network cables.

[0041] When the technical solution provided in this application is applied to the monitoring of large, medium and small reservoir projects, dam slope projects, bridge and tunnel projects, the location of monitoring point 6 and monitoring base point 1 needs to be determined according to the characteristics of the specific project and the monitoring requirements. The following is an overview of the location of monitoring point 6 and monitoring base point 1 based on general engineering experience and monitoring principles:

[0042] 1. Location of monitoring point 6

[0043] 1. Large, medium and small reservoir projects

[0044] Dam surface and interior: Monitoring points 6 are set on the dam surface (such as the upstream surface, downstream surface, and dam top) and inside the dam (through drilling or pre-buried pipes) to monitor the displacement, settlement, cracks and other deformation of the dam.

[0045] Reservoir water level change area: Monitoring point 6 is set in the area where the reservoir water level changes greatly to monitor the impact of water level changes on the stability of the dam body.

[0046] Seepage risk area: Seepage pressure water level monitoring point 6 is set in the dam section where there may be seepage risk (such as the downstream side of the core wall, the dam foot or the front edge of the drainage body) to monitor the change of seepage pressure.

[0047] 2. Dam slope engineering

[0048] Top, middle and bottom of the slope: Monitoring point 6 should cover the entire slope, including the top, middle and bottom, to fully monitor the deformation of the slope.

[0049] Areas with complex geological conditions: Add monitoring point 6 in areas with complex geological conditions (such as rock layer boundaries, fault zones, weak interlayers, etc.) or obvious slope features (such as cracks, landslides, etc.).

[0050] Potential sliding surface: If there is a potential sliding surface on the slope, monitoring points 6 should be set on or near the surface to monitor the deformation and displacement of the sliding surface.

[0051] 3. Bridge and tunnel engineering

[0052] Key parts of bridge structure: Monitoring points 6 are set at key parts of the bridge, such as piers, main beams, and supports, to monitor the deformation and displacement of the bridge.

[0053] Tunnel wall and vault: Monitoring points 6 are set on the tunnel wall and vault to monitor the deformation during tunnel excavation and support.

[0054] Areas with complex geological structures: Add monitoring point 6 in areas where the tunnel passes through complex geological structures (such as faults, fracture zones, etc.) to monitor the impact of changes in geological conditions on tunnel stability.

[0055] 2. Location of Monitoring Base Point 1

[0056] Monitoring base point 1 is the reference point of the monitoring system, and its location should meet the following requirements:

[0057] Stability: Monitoring base point 1 should be set in an area with stable geological conditions and minimal deformation to ensure the accuracy and reliability of the monitoring data.

[0058] Accessibility: Monitoring base points 1 should be easily accessible and maintainable to allow for calibration and repair when required.

[0059] Safety: The setting of monitoring base point 1 should take into account the safety of personnel and equipment, and avoid setting it in dangerous areas or vulnerable locations.

[0060] In actual applications, the location of the monitoring base points may be adjusted according to the characteristics of the specific project and the monitoring needs. For example, in a reservoir project, the monitoring base points may be set in an area far away from the reservoir dam with stable geological conditions; in a slope project, the monitoring base points may be set in a stable area above or below the slope; in a bridge and tunnel project, the monitoring base points may be set on stable ground at both ends of the bridge or near the entrance and exit of the tunnel.

[0061] The above information is an overview based on general engineering experience and monitoring principles. In actual application, detailed design and planning are required based on the characteristics and monitoring requirements of the specific project.

[0062] Through the scheme of the present application, the displacement change and the law of displacement change of a single-point monitored point or multiple monitored points relative to a fixed point (monitoring base point) can be obtained, the distance value data changes collected on-site can be compared and analyzed, the danger level of the monitored parts can be evaluated, and then dangerous situation warnings can be carried out, which effectively improves the reliability of monitoring and engineering practicality, and has a strong value for promotion and application.

[0063] In addition, the PLC-controlled multi-point non-contact displacement monitoring device provided by the present application has fast and efficient communication, is not restricted by geographical environment, climate and other factors, data can be automatically monitored and remotely transmitted in real time, has low power consumption, simple structure, stable and reliable system, convenient operation and practical value. It can be used for monitoring of large, medium and small reservoir projects, dam slope projects, bridge and tunnel projects, etc. It not only solves the problem of high monitoring manpower and vehicle costs, but also alleviates the problem of difficult on-site power supply, is beneficial to environmental protection, and has significant social benefits and technical and economic benefits.

[0064] Note that, unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) may be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features. Where used, further, preferably, further and more preferably are simple beginnings for elaborating another embodiment based on the aforementioned embodiment, and the content of the further, preferably, further or more preferably followed by the combination with the aforementioned embodiment constitutes a complete construction of another embodiment. Several further, preferably, further or more preferably settings following the same embodiment can be arbitrarily combined to form another embodiment.

[0065] In the implementation of functions and steps, the corresponding functions and steps in various embodiments may also occur in a different order than shown. For example, two consecutive functions and steps may actually be performed or implemented substantially in parallel, and they may sometimes be performed or implemented in the opposite order, depending on the functions involved.

[0066] Although the present application has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. A multi-point non-contact displacement monitoring device based on PLC control, characterized in that: include: Motion control rotating mechanism, displacement sensor, reflector, TCP / IP communication module, PLC data acquisition and analysis module, motion control positioning module, among which, The motion control rotation mechanism is arranged at a monitoring base point; The displacement sensor is connected to one end of the motion control rotating mechanism; The reflector is arranged at the monitoring point and faces the displacement sensor, and is used to reflect the laser pulse emitted by the displacement sensor; One end of the TCP / IP communication module is electrically connected to the displacement sensor, and the other end is electrically connected to the PLC data acquisition and analysis module; The motion control positioning module is electrically connected to the PLC data acquisition and analysis module and the motion control rotating mechanism respectively.

2. The multi-point non-contact displacement monitoring device based on PLC control according to claim 1 is characterized in that: One end of the motion control rotating mechanism is connected to the monitoring base point through a mechanical connection base, and the other end of the motion control rotating mechanism is connected to the displacement sensor, which is used to drive the displacement sensor to rotate through relative rotation between the two ends.

3. The multi-point non-contact displacement monitoring device based on PLC control according to claim 1 is characterized in that: The motion control rotating mechanism includes a motor, a reducer, a coupling, a spindle, and a position sensor, wherein the motor is a stepper motor or a servo motor, the motor output end is connected to the reducer, the coupling is respectively connected to the motor output shaft and one end of the spindle, the other end of the spindle is connected to the displacement sensor, and the position sensor is used to monitor the rotation position and speed of the spindle in real time.

4. The multi-point non-contact displacement monitoring device based on PLC control according to claim 1 is characterized in that: A diamond-grade reflective film is provided on one side of the reflective plate facing the displacement sensor, and one end of the reflective plate is connected to the monitoring point through a mounting bracket and a pre-buried connector.

5. The multi-point non-contact displacement monitoring device based on PLC control according to claim 1 is characterized in that: Also includes: The early warning module is electrically connected to the PLC data acquisition and analysis module and is used to receive instructions from the PLC data acquisition and analysis module and issue an early warning when the displacement of the monitoring point exceeds a preset value.

6. The multi-point non-contact displacement monitoring device based on PLC control according to claim 1 is characterized in that: Also includes: The HMI display module is electrically connected to the PLC data acquisition and analysis module, and is used to interact with the PLC data acquisition and analysis module and display the measured distance value of the monitoring point.

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