Real-time monitoring system based on interval type long-acting force measurement inhaul cable system

Abstract

A real-time monitoring system based on an interval type long-acting force measurement inhaul cable system comprises an anchorage device (1) and an interval force measurement inhaul cable (2), one end of the interval force measurement inhaul cable (2) is fixed to the anchorage device (1), and the real-time monitoring system is characterized in that an interval sensor (4) is installed at the fixed end of the anchorage device (1); the interval sensor (4) is connected with a signal input end of the synchronous calibration acquisition and analysis system (6) through a cable or a wireless connection mode, the synchronous calibration acquisition and analysis system (6) is connected with the data transmission system (7), and the data transmission system (7) is connected with the monitoring platform system (8) through a wired connection or wireless communication mode. The device is simple in structure and convenient to install and replace, cable force does not need to be unloaded, temperature compensation is not needed, reliability and measurement precision are improved, the device is less affected by the environment, and the service life is long.

Description

Technical Field

[0001] Bridge cables are crucial load-bearing components, and cable force monitoring is a vital part of structural safety monitoring systems. Existing bridge cable force measurement technologies primarily employ fiber optic grating sensors, resistance strain gauge sensors, or magnetic flux sensors. However, each of these sensors has certain drawbacks and limitations. For example, they are highly sensitive to environmental conditions; fiber optic gratings and resistance strain gauges require complex temperature compensation; magnetic flux sensors are easily affected by surrounding magnetic fields and ambient temperature; and repeated magnetization of cables and coils leads to severe hysteresis, affecting measurement accuracy. Calibration efficiency is low, manual calibration is cumbersome, simultaneous calibration of multiple cables on-site is difficult to achieve, and differences between equipment and on-site conditions can easily introduce errors, resulting in low measurement accuracy. Furthermore, there are issues with stability; traditional sensors suffer from data distortion due to creep and zero-point drift, and pressure ring sensors require unloading cable force for replacement, leading to high maintenance costs. Therefore, providing a real-time monitoring system for cable force measurement that is highly reliable, requires no temperature compensation, offers high measurement accuracy, is easy to install and replace, and does not require unloading cable force is a technical problem urgently needing to be solved by those skilled in the art. Background Technology

[0002] Bridge cables are crucial load-bearing components, and cable force monitoring is a vital part of structural safety monitoring systems. Existing bridge cable force measurement technologies primarily employ fiber optic grating sensors, resistance strain gauge sensors, or magnetic flux sensors. However, each of these sensors has certain drawbacks and limitations. For example, they are highly sensitive to environmental conditions; fiber optic gratings and resistance strain gauges require complex temperature compensation; magnetic flux sensors are easily affected by surrounding magnetic fields and ambient temperature; and repeated magnetization of cables and coils leads to severe hysteresis, affecting measurement accuracy. Calibration efficiency is low, manual calibration is cumbersome, simultaneous calibration of multiple cables on-site is difficult to achieve, and differences between equipment and on-site conditions can easily introduce errors, resulting in low measurement accuracy. Furthermore, there are issues with stability; traditional sensors suffer from data distortion due to creep and zero-point drift, and pressure ring sensors require unloading cable force for replacement, leading to high maintenance costs. Therefore, providing a real-time monitoring system for cable force measurement that is highly reliable, requires no temperature compensation, offers high measurement accuracy, is easy to install and replace, and does not require unloading cable force is a technical problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings and deficiencies of traditional cable force monitoring sensors, such as inconvenient installation and replacement, the need to unload cable force, the need for temperature compensation, low reliability and measurement accuracy, and significant susceptibility to environmental influences. This application provides a real-time monitoring system based on a range-type long-term force measurement cable system, which has a reasonable structure, is easy to install and replace, does not require unloading cable force, does not require temperature compensation, has improved reliability and measurement accuracy, is less affected by environmental influences, and has a long service life.

[0004] To achieve the objectives of the above application, the technical solution of this application is: a real-time monitoring system based on a long-term interval force-measuring cable system, including an anchor and an interval force-measuring cable. One end of the interval force-measuring cable is fixed to the anchor. An interval sensor is installed on the fixed end of the anchor. The interval sensor is connected to the signal input end of a synchronous calibration acquisition and analysis system via cable or wireless connection. The synchronous calibration acquisition and analysis system is connected to a data transmission system. The data transmission system is connected to a monitoring platform system via wired connection or wireless communication.

[0005] Furthermore, the interval force measuring cable is composed of multiple high-strength steel wires.

[0006] Furthermore, the interval sensor is mounted on the fixed end of the anchor via a sensor fixing component.

[0007] Furthermore, the interval sensor is connected to the synchronous calibration acquisition and analysis system via an anti-interference shielded signal line.

[0008] Furthermore, the data transmission system is a multi-modal data transmission system, employing a hybrid network of 4G / 5G and LoRa.

[0009] Furthermore, a specific interval section of the cable is selected as the cable force-sensitive area for measuring displacement changes.

[0010] Furthermore, a tensioning device is installed on the tensioning end of the interval force measuring cable, and a pressure sensor is installed on the tensioning device.

[0011] The beneficial effects of this application are:

[0012] 1. This application utilizes the high-strength steel wire material of the force-measuring cable itself as the sensitive element for force measurement. The displacement data of the cable is collected in real time by the interval sensor, and after processing and conversion by the synchronous calibration acquisition and analysis system, the cable force change can be monitored well in real time and accurately.

[0013] 2. The sensor in this application is easy to install and replace, does not require temperature compensation, has high measurement accuracy, does not require unloading cable force, and can support multi-cable synchronous calibration on site, automatically eliminates nonlinear data points and refits, thus improving the accuracy and efficiency of calibration.

[0014] 3. This application is less affected by the environment, has strong anti-interference ability, can ensure real-time and accurate data transmission, has data storage, analysis and early warning functions, can detect abnormal changes in cable tension in a timely manner and issue early warning signals, thus realizing real-time monitoring and early warning. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of this application.

[0016] Figure 2 This is a schematic diagram of the installation of the interval sensor in this application.

[0017] Figure 3 This is a structural schematic diagram of a specific embodiment of this application.

[0018] In the diagram: 1. Anchorage; 2. Interval force measuring cable; 3. High-strength steel wire; 4. Interval sensor; 5. Sensor fixing component; 6. Synchronous calibration acquisition and analysis system; 7. Data transmission system; 8. Monitoring platform system; 9. Cable force measuring sensitive area; 10. Tensioning equipment; 11. Pressure sensor. Detailed Implementation

[0019] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] See Figures 1 to 3 This application discloses a real-time monitoring system based on a long-term interval force-measuring cable system, comprising an anchor 1 and an interval force-measuring cable 2, one end of which is fixed to the anchor 1. The system is characterized in that: an interval sensor 4 is installed on the fixed end of the anchor 1; the interval sensor 4 is connected to the signal input terminal of a synchronous calibration acquisition and analysis system 6 via cable or wireless connection; the synchronous calibration acquisition and analysis system 6 is connected to a data transmission system 7; and the data transmission system 7 is connected to a monitoring platform system 8 via wired connection or wireless communication.

[0021] The interval force measuring cable 2 is composed of multiple high-strength steel wires 3.

[0022] The interval sensor 4 is mounted on the fixed end of the anchor 1 via the sensor fixing component 5.

[0023] The interval sensor 4 is connected to the synchronous calibration acquisition and analysis system 6 through an anti-interference shielded signal line.

[0024] The data transmission system 7 is a multi-modal data transmission system that uses a hybrid network of 4G / 5G and LoRa.

[0025] A specific section of the cable 2 is selected as the cable force-sensitive area 9 for measuring displacement changes.

[0026] A tensioning device 10 is installed on the tensioning end of the interval force measuring cable 2, and a pressure sensor 11 is installed on the tensioning device 10.

[0027] Referring to the accompanying drawings, this application directly utilizes the linear elastic properties of the high-strength steel wire in the cable as the force-sensing element, and performs real-time monitoring through sensors. Combined with intelligent synchronous calibration algorithms and multimodal data transmission technology, it achieves high-precision, long-life real-time monitoring of the cable force in bridges, effectively overcoming the shortcomings of traditional bridge cable force measuring devices. The specific structure and principle are as follows:

[0028] One end of the section force-measuring cable 2 is fixed to the anchor 1. A section sensor 4 is installed on the fixed end of the anchor 1 via a sensor fixing component 5, which can collect the displacement data of the cable in real time. The section sensor 4 can be a pressure sensor, a tension sensor, or a hydraulic sensor. A specific section of the cable is selected as the cable force-measuring sensitive area 9 for measuring displacement changes. The influence of the section sensor 4 on the temperature range of -30℃ to +70℃ is less than 0.1%FS, and it can be easily replaced without unloading during operation.

[0029] The section sensor 4 is connected to the synchronous calibration, acquisition, and analysis system 6 via cable or wireless connection. It is typically connected to the signal input terminal of the synchronous calibration, acquisition, and analysis system 6 through an anti-interference shielded signal cable, ensuring stable signal transmission and strong anti-interference capability. The synchronous calibration, acquisition, and analysis system 6 integrates a multi-channel data acquisition instrument and an edge computing unit, supporting the synchronous access of the section sensor 4 and other sensors. After processing and conversion by the synchronous calibration, acquisition, and analysis system 6, the changes in cable force can be monitored in real time and accurately. This application is based on a dynamic linear regression algorithm, i.e., the least squares method, to automatically generate force-displacement curves and optimize data in real time. When the determination coefficient R² < 0.99, non-linear data points are automatically eliminated and refitted until the accuracy requirements are met.

[0030] The synchronous calibration, acquisition, and analysis system 6 is connected to the data transmission system 7. The data transmission system 7 is a multimodal data transmission system that primarily transmits the displacement data from the acquired interval sensors and the converted cable force data. It utilizes a hybrid 4G / 5G and LoRa network, combined with adaptive channel selection technology, achieving a data transmission packet loss rate of <0.1% and a latency of <200ms. High-speed and stable communication technology ensures real-time and accurate data transmission. The data transmission system 7 connects to the monitoring platform system 8 via wired or wireless communication. The monitoring platform system 8 supports multi-terminal access via Web / APP, integrates a BIM 3D visualization interface, and displays the cable stress status in real time. Simultaneously, the monitoring platform system 8 also has data storage, analysis, and early warning functions, enabling timely detection of abnormal changes in cable force and the issuance of early warning signals.

[0031] In addition, a tensioning device 10 is installed on the tensioning end of the section force-measuring cable 2, and a pressure sensor 11 is installed on the tensioning device 10. During the tensioning stage, data from other sensors can be collected and analyzed in real time.

[0032] The working principle and usage process of this application are as follows: First, the device is installed and the system is connected. The interval sensor 4 is installed on the fixed end of the anchor 1, and the interval sensor 4 is connected to the synchronous calibration acquisition and analysis system 6 through an anti-interference shielded signal line. The synchronous calibration acquisition and analysis system 6 is connected to the data transmission system 7, and the data transmission system 7 establishes a data communication connection with the monitoring platform system 8. Then, synchronous calibration is performed. The calibration process is carried out simultaneously with the tensioning of the cables. After tensioning is completed, the calibration coefficients (regression coefficients) and the current force sensor values ​​are extracted and applied to the cable force conversion equation on the cable force monitoring interface for cable force monitoring. This system supports simultaneous cable tensioning calibration of multiple cables, which can meet the needs of symmetrical tensioning on site and improve calibration efficiency and accuracy.

[0033] After calibration, data acquisition and transmission are performed. The force sensor and tensioning equipment are removed, leaving only section sensor 4. Section sensor 4 then enters the real-time cable stress health monitoring phase. Section sensor 4 collects real-time cable displacement data, which is processed and converted by the synchronous calibration acquisition and analysis system to obtain cable stress data. The monitoring platform system 8 receives the data transmitted from the server, displays the real-time cable stress data in Web or APP terminal mode, and stores and analyzes the data. When abnormal changes occur in the cable stress data, the system promptly issues an early warning signal to remind relevant personnel to take action, achieving real-time monitoring and early warning.

[0034] The above description is a further detailed explanation of this application in conjunction with specific embodiments. It should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, there will be various simple substitutions, improvements and changes to this application without departing from the concept of this application. All such simple substitutions, improvements and changes should be considered to fall within the protection scope of this application.

Claims

1. A real-time monitoring system based on a long-term interval force-measuring cable system, comprising an anchor (1) and an interval force-measuring cable (2), one end of the interval force-measuring cable (2) being fixed to the anchor (1), characterized in that: An interval sensor (4) is installed on the fixed end of the anchor (1). The interval sensor (4) is connected to the signal input end of the synchronous calibration acquisition and analysis system (6) via cable or wireless connection. The synchronous calibration acquisition and analysis system (6) is connected to the data transmission system (7). The data transmission system (7) is connected to the monitoring platform system (8) via wired connection or wireless communication.

2. The real-time monitoring system based on a long-term interval force-measuring cable system according to claim 1, characterized in that: The interval force measuring cable (2) is composed of multiple high-strength steel wires (3).

3. The real-time monitoring system based on a long-term interval force-measuring cable system according to claim 1, characterized in that: The interval sensor (4) is installed on the fixed end of the anchor (1) via the sensor fixing part (5).

4. The real-time monitoring system based on a long-term interval force-measuring cable system according to claim 1, characterized in that: The interval sensor (4) is connected to the synchronous calibration acquisition and analysis system (6) through an anti-interference shielded signal line.

5. The real-time monitoring system based on a long-term interval force-measuring cable system according to claim 1, characterized in that: The data transmission system (7) is a multi-modal data transmission system, which adopts a hybrid networking of 4G / 5G and LoRa.

6. The real-time monitoring system based on a long-term interval force-measuring cable system according to claim 1, characterized in that: A specific section of the cable (2) is selected as the cable force sensitive area (9) for measuring displacement changes.

7. The real-time monitoring system based on a long-term interval force-measuring cable system according to claim 1, characterized in that: The tensioning end of the interval force measuring cable (2) is equipped with a tensioning device (10), and a pressure sensor (11) is installed on the tensioning device (10).

Images