Displacement/deflection measuring system and method

Abstract

The invention discloses a displacement / deflection measuring system, which comprises dip angle sensors, a data acquisition device, a data sending device and a data analysis device, wherein the dip angle sensors are arranged on a structure or a member to be measured to acquire dip angle values of measuring points at which the dip angle sensors are positioned, and the measuring point at which the first dip angle sensor is positioned is used as a datum point; the data acquisition device is used for acquiring the dip angle value, which is measured by each dip angle sensor, of each measuring point, and conditioning the acquired dip angle values; the data sending device is used for sending the conditioned dip angle values to the data analysis device; and the data analysis device is used for calculating a displacement function by matching positional information, relative to the datum point, of each measuring point according to the received dip angle values to acquire a displacement / deflection condition. The invention also discloses a displacement / deflection measuring method. In the displacement / deflection measuring system, the boundary condition of a girder structure within a measuring range is not limited, and the displacement / deflection of the structure or the member to be measured can be measured accurately.

Description

technical field [0001] The invention belongs to the technical field of civil engineering structure behavior detection and monitoring, and relates to a displacement / deflection measurement system and method. Background technique [0002] Displacement testing is of great significance to the performance detection and monitoring of civil engineering structures. Displacement is an important parameter reflecting the mechanical behavior of a structure, and it is also a key indicator for relevant codes and standards to set limits for structural safety considerations. For example, in the bridge structure, the safety status of the bridge main structure can be judged by measuring the deflection of the main girder; in the pipeline structure, the service performance of the pipeline can be evaluated by measuring the displacement of the pipe body; The measurement of the inclination of the column is used to analyze the mechanical behavior of the component or structure and then evaluate its ...

AI Technical Summary

Problems solved by technology

[0004] (1) The dial indicator method (dial indicator) can realize the direct measurement of the structural displacement / deflection value, and the measurement result has high precision and good reliability. Setting up the tripod, these preparations are very time-consuming, and the reading and recording of data requires manual operation, which is difficult to apply in the field of monitoring

[0005] (2) Although the displacement meter method has high measurement accuracy, this method usually requires a reference plane to measure the relative displacement between the measuring point and the reference plane. However, this reference plane is difficult to satisfy in practice. Even if it can be satisfied, many restrictions may be added to the selection of measuring points

[0006] (3) The total station method is a deformation test method often used in engineering. The measurement results of this method are reliable and high-precision. However, since the application of this method requires manual operation, the measurement cycle is long, especially for measurement. In the case of long segments and many measuring points, time-consuming and labor-intensive

[0007] (4) The laser method is a displacement test method that utilizes the good directionality of the laser. A major defect of this method in the application is that there must be no obstacles between the laser source and the measuring point, which affects the arrangement of the sensor at the measuring point. , Added restrictions on the selection

[0008] (5) The connecting pipe method is mainly based on the principle of "the same pressure of the static liquid in the connecting device on the horizontal plane" in physics. The accuracy is low, and the liquid in the hose is easily affected by temperature

[0009] (6) The accuracy of the measurement results of the GPS method is high, but the cost of monitoring using this method is very high, and it is more suitable for the situation where there are few measuring points

[0010] In addition, the above-mentioned displacement test methods are usually only suitable for regular manual detection, and it will face many technical and economic difficulties to develop into an effective and convenient real-time monitoring method

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