CN202492796U - Intelligent dynamometric support for bridge health - Google Patents

Abstract

The utility model relates to an intelligent force-measuring support for bridge health, which includes a plate-type rubber support, and is characterized in that: the plate-type rubber support is equipped with a force-measuring element, and the force-measuring element includes a plurality of The axial pressure and shear force are symmetrically arranged in the optical fiber strain sensor in the plate rubber bearing, and the optical fiber strain sensor is connected to the optical fiber data acquisition converter that converts the optical signal into an electrical signal and displays it in the form of strain, And the average value of the readings of multiple optical fiber strain sensors collected by the optical fiber data acquisition converter is taken as the final force and strain measurement value of the support. The utility model can accurately and effectively monitor the stress situation of the bridge support, and the shape of the support is no different from that of the ordinary support. Real-time tracking and monitoring of abnormal changes.

Description

Intelligent force-measuring bearings for bridge health

technical field

The utility model relates to an intelligent force-measuring bearing for bridge health monitoring, which is suitable for monitoring bridges and other engineering structures. the

Background technique

For a long time, the monitoring of bridge bearings has been mainly carried out through traditional manual and visual inspection methods, such as inspections with the help of simple tools such as telescopes. Generally, it is necessary to go to the bridge under the bridge or use a high-cost bridge monitoring vehicle for inspection. Due to the high pier abutment and the small clearance between beams, slabs and pier abutment, the detection work is not only very inconvenient, but also has certain dangers. The most important thing is that this detection method cannot determine the actual working performance of the bearing, nor can it monitor the stress situation of the bearing or even the health status of the bridge structure. the

Contents of the invention

In view of the deficiencies in the prior art, the purpose of this utility model is to provide an intelligent force-measuring bearing that can accurately and effectively detect the health status of a bridge. the

In order to achieve the above object, the technical solution of this utility model is: an intelligent force-measuring bearing for healthy bridges, including a plate-type rubber bearing, characterized in that: the plate-type rubber bearing is equipped with a force-measuring element, and the force-measuring The element includes a plurality of optical fiber strain sensors that are used to sense the axial pressure and shear force of the bearing and are symmetrically arranged in the plate rubber bearing. The optical fiber strain sensors are all connected to the out of the fiber optic data acquisition converter. the

Further, the force measuring element includes two optical fiber strain sensors, and the two optical fiber strain sensors are pasted symmetrically along the central axis of the reinforced steel plate in the middle layer of the plate-type rubber bearing. the

Further, the inner end of the optical fiber strain sensor is covered with a glass tube, the middle part of the optical fiber strain sensor is covered with Kevlar fibers, and the outer end of the optical fiber strain sensor is provided with an optical fiber connector. The optical fiber connector is connected with the optical fiber data acquisition converter through wires. the

Further, the plate-type rubber bearing and the optical fiber strain sensor are made into one body. the

Further, the optical fiber data acquisition converter is connected to the monitoring center. the

Compared with the prior art, the utility model has the following advantages: (1) The load-measuring element of the support is integrated with the support structure, and the optical signal of the optical fiber strain sensor is transmitted to the optical data acquisition converter through the wire, and then Combined with the stress-strain curve calibrated in advance in the experiment, the internal force of the support can be detected at any time, and the measurement method is simple and reliable; The stress on the support can be obtained through lateral strain inverse calculation, which can improve the accuracy, reliability and stability of the test; (3) Due to the use of photoelectric testing technology to detect the force on the support, the adaptability of the test working conditions is strong, and it can be Truly realize long-term, remote and automatic detection; (4) Network technology can be used to realize real-time, automatic and linkage monitoring of the stress on multiple supports; through comprehensive calculation and analysis of collected data, it is possible to realize the monitoring of the entire bridge structure (5) It can detect in real time the uneven distribution of stiffness caused by vehicle overload or structural performance changes on the bridge, which is suitable for bridge construction vehicle load and future bridge health monitoring; (6) ) can effectively understand the working status of the support, so as to guide the maintenance of the support and the monitoring of the bridge expansion joint. the

Description of drawings

Fig. 1 is a structural schematic diagram of an intelligent force-measuring bearing for bridge health according to an embodiment of the present invention. the

Fig. 2 is a schematic diagram of the installation of the load-measuring element of the embodiment of the utility model. the

Fig. 3 is a schematic diagram of the installation of the optical fiber sensor of the embodiment of the present invention. the

In the figure: 1-plate rubber bearing, 2-reinforced steel plate, 3-optical fiber strain sensor, 4-optical fiber data acquisition converter, 5-glass tube, 6-Kevlar fiber, 7-optical fiber connector, 8-wire . the

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments to help understand the application of the utility model, but the protection scope of the utility model is not limited to this specific embodiment. the

Referring to Figures 1 to 3, a healthy intelligent force-measuring bearing for a bridge comprises a plate-type rubber bearing 1, and is characterized in that: the plate-type rubber bearing 1 is equipped with a force-measuring element, and the force-measuring element includes a plurality of An optical fiber strain sensor 3 that senses the axial pressure and shear force on the support and is symmetrically arranged in the plate rubber support 1, and the optical fiber strain sensor 3 is connected to the optical fiber data that converts the optical signal into an electrical signal and displays it A collection converter 4, the optical fiber data collection converter 4 is connected to the monitoring center. the

In this embodiment, the load cell includes two optical fiber strain sensors 3, and the two optical fiber strain sensors 3 are pasted symmetrically along the central axis of the reinforced steel plate 2 in the middle layer of the plate rubber bearing 1, and the plate rubber bearing The seat 1 and the optical fiber strain sensor 3 are made into one body. The inner end of the optical fiber strain sensor 3 is sheathed with a glass tube 5, the middle part of the optical fiber strain sensor 3 is sheathed with a Kevlar fiber 6 for protection, and the outer end of the optical fiber strain sensor 3 is provided with An optical fiber connector 7, the optical fiber connector 7 is connected to the optical fiber data acquisition converter 4 via a wire 8. the

In this embodiment, the support can easily sense and display the stress of the support through the optical fiber strain sensor 3 and the external optical fiber data acquisition converter 4, and realize the long-term and long-term monitoring of the force of the support. Real-time monitoring, the results can be used as the basis for bridge health monitoring and life assessment. the

This embodiment also provides a bridge health monitoring method, which includes several plate rubber bearings 1, on each plate rubber bearing 1 a force measuring element is respectively installed, and the force measuring element includes a plurality of corresponding bearings for sensing The optical fiber strain sensor 3 of the axial pressure and shear force on the upper surface; a plurality of optical fiber strain sensors 3 are symmetrically arranged in the corresponding plate rubber bearing 1, and connected to a device that converts optical signals into electrical signals and displays them in the form of strain Optical fiber data acquisition converter 4; the average value of multiple optical fiber strain sensors 3 collected by the optical fiber data acquisition converter 4 is taken as the final force and strain measurement value of the support, which improves the safety and accuracy of data acquisition. Multiple optical fiber data acquisition converters 4 are connected to the monitoring center through network technology, which can realize real-time, automatic and linkage monitoring of the stress on multiple supports. Diagnose, assess, and predict the health status of patients. the

In this embodiment, the load cell includes two optical fiber strain sensors 3, and the two optical fiber strain sensors 3 are pasted symmetrically along the central axis of the reinforced steel plate 2 in the middle layer of the plate rubber bearing 1, and the plate rubber bearing The seat 1 and the optical fiber strain sensor 3 are made into one body. The inner end of the optical fiber strain sensor 3 is covered with a glass tube 5, the middle part of the optical fiber strain sensor 3 is protected by Kevlar fiber 6, and the outer end of the optical fiber strain sensor 3 is provided with an optical fiber connector 7 , the optical fiber connector 7 is connected to the optical fiber data acquisition converter 4 through a wire 8 . the

In this embodiment, the wire 8 transmits the optical signals of the two optical fiber strain sensors 3 to an optical fiber data acquisition converter 4; the data collected and converted by the optical fiber data acquisition converter 4, and according to the laboratory pre-calibrated The relationship between stress and strain can accurately and conveniently obtain the force situation of the entire support. The laboratory support calibration method is to establish a corresponding relationship between the vertical pressure or horizontal shear force on the surface of the intelligent force-measuring support and the strain value displayed by the optical fiber data acquisition converter 4 by using a specially designed set of fixtures; The plate is made of hard aluminum with a thickness of 12.7mm. The surface of the aluminum plate that is in direct contact with the support needs to be sandblasted first, and then coated with epoxy glue to ensure that there is no relative sliding between them and that external forces can be effectively transmitted. the

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model. the

Claims (5)

1. A healthy intelligent force-measuring bearing for bridges, comprising a plate-type rubber bearing, characterized in that: the plate-type rubber bearing is equipped with a force-measuring element, and the force-measuring element includes a plurality of shafts for inductive bearings The optical fiber strain sensors for pressure and shear force are arranged symmetrically in the plate-type rubber bearing, and the optical fiber strain sensors are all connected to an optical fiber data acquisition converter that converts optical signals into electrical signals and displays them in the form of strain. 2. The intelligent force-measuring bearing of bridge health according to claim 1, characterized in that: the force-measuring element comprises two optical fiber strain sensors, and the two optical fiber strain sensors are strengthened along the middle layer of the plate rubber bearing The central axis of the steel plate is pasted symmetrically. 3. The intelligent force-measuring support for bridge health according to claim 1 or 2, characterized in that: the inner end of the optical fiber strain sensor is sleeved with a glass tube, and the middle portion of the optical fiber strain sensor is sleeved with a glass tube. Kevlar fiber, the outer end of the optical fiber strain sensor is provided with an optical fiber connector, and the optical fiber connector is connected with the optical fiber data acquisition converter through a wire. 4. The intelligent force-measuring bearing for bridge health according to claim 3, characterized in that: the plate-type rubber bearing and the optical fiber strain sensor are integrated. 5. The intelligent force-measuring bearing for bridge health according to claim 3, characterized in that: the optical fiber data acquisition converter is connected to a monitoring center.

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