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System and method for measuring deflection of bridge structure based on wireless tilt

A deflection measurement and bridge structure technology, applied in the testing of machine/structural components, measuring devices, elasticity testing, etc., can solve the problems of inaccurate measurement and failure to consider external load conditions, etc.

Inactive Publication Date: 2010-12-15
DALIAN UNIV OF TECH
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Problems solved by technology

[0010] The above formula only considers the effect of the bridge's own weight. Obviously, the above formula is used to measure the deflection of the bridge under various conditions. Because the external load condition is not considered, the measurement is inaccurate

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  • System and method for measuring deflection of bridge structure based on wireless tilt
  • System and method for measuring deflection of bridge structure based on wireless tilt
  • System and method for measuring deflection of bridge structure based on wireless tilt

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Embodiment Construction

[0037] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0038] The wireless inclination sensor structure of the present invention is as Figure 4 shown. The inclination measurement unit selects the sensor chip based on MEMS technology to sense the signal. The inclination acquisition unit is responsible for sending the inclination data sensed by the MEMS chip to the wireless transceiver module in serial port mode. The wireless transceiver module is implemented by a general wireless module with a serial port. The energy module adopts Lithium battery, NiMH battery or solar battery commonly used in the market. The two wireless inclination sensor nodes are pre-loaded with embedded programs, and the computer runs the algorithm program for calculating the deflection from the inclination angle.

[0039] The calculation algorithm for deflection is implemented as follows:

[0040] p is...

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Abstract

The invention discloses a system and method for measuring deflection of a bridge structure based on wireless tilt, belonging to the technical field of bridge structure measurement. The invention is characterized in that the system is jointly formed by two wireless tilt sensors, a wireless data unit and a personal computer (PC), wherein the wireless data unit is connected with the PC via a serial port; and each wireless tilt sensor is jointly formed by a micro electro mechanical system (MEMS) technology based tilt unit, a tilt acquisition unit, a wireless transceiving unit and an energy module. The method is characterized by building the bridge deflection curve formula in consideration of the joint action of the deal weight of the bridge structure and the external load, deriving the deflection formula to obtain the tilt formula, computing the unknown parameters according to the actually measured tilt and further obtaining the deflection. The invention overcomes the defects existing in the traditional wired measuring systems and methods, the system has the characteristics of high testing precision, good stability, strong real-time property, accurate computation, etc, and the method is suitable for measuring deflection of similar bridge structures and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of bridge structure measurement, and relates to a bridge structure monitoring deflection measurement system and method suitable for application based on a wireless inclination acquisition system, specifically a method for measuring the structural inclination by using wireless sensing technology, and then calculating Measurement systems and methods for obtaining structural deflection values. Background technique [0002] The bridge is an important part of the modern transportation network, and its safety monitoring is very necessary. In the past, bridge monitoring was mostly carried out by visual inspection. Now, with the development of science and technology, more and more monitoring instruments are used for bridge monitoring. Through the analysis of bridge monitoring data, we can understand the past and present working conditions of bridge structures and predict their future conditions, and deflection is a...

Claims

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Application Information

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IPC IPC(8): G01M5/00G01B7/30G08C17/02
Inventor 喻言欧进萍
Owner DALIAN UNIV OF TECH
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