Method for measuring vertical displacement by hydraulic pressure and temperature and device thereof

Abstract

The invention provides a method for measuring vertical displacement by utilizing hydraulic pressure and temperature and a device thereof. The invention is characterized in that pressure sensors and temperature sensors are respectively arranged at the bottom parts inside n same liquid containing tubes; the pressure sensors and the temperature sensors are connected with a computer system through a circuit; the lower parts or the bottoms of the n liquid containing tubes are communicated with each other through hoses, wherein, a liquid containing tube is vertically arranged at the datum point, and the rest liquid containing tubes are arranged vertically at a plurality of points to be measured; and the change in vertical displacement of the points to be measured can be obtained through comparison between all the points to be measured and the datum point liquid surface elevation difference Delta Ln and the analysis by the computer. The method provided by the invention takes into account the effects of environmental temperature on the measurement accuracy; the change in the hydraulic column is measured by the pressure sensors; the liquid density is subjected to conversion at different temperatures; and the invention has the characteristic of high measuring accuracy. Meanwhile, the method is not affected by disturbance by beams. The invention has the characteristics of simple structure, convenient installation and debugging, good reliability, and low cost.

Description

technical field [0001] The invention relates to a measurement method and device for detecting and monitoring bridge deflection, ground subsidence, building subsidence and displacement detection and monitoring, especially an automatic vertical displacement measurement method and device using a horizontal liquid surface as a reference plane. Background technique [0002] Detecting bridge deflection, ground subsidence, and building sinking plays an important role in modern roads, bridges, and buildings. In the prior art, there are many methods and devices for detecting and monitoring bridge deflection and ground settlement. However, most of them do not consider the influence of ambient temperature on the measurement system, so there is a problem of low measurement accuracy. For example CN101055218 (patent application number is 200710103777.0) discloses a kind of " monitoring device and monitoring method of bridge deflection and displacement ", and it is to utilize the straight...

AI Technical Summary

Problems solved by technology

CN1651855 (Patent No. 200510020375.5) discloses "two-dimensional, large-scale laser deflection / displacement measurement method and device", which controls the controllable damping hinge structure so that the laser beam reflecting the position of the measured structure is horizontally irradiated on the spot receiving and measuring device The spot is formed, the spot and the mark are imaged by the camera equipment, and then the relative distance between the center of gravity of the laser spot and the light-emitting diode image is calculated to obtain the coordinates of the current spot, and the initial value is subtracted from the coordinates to obtain the displacement value of the current spot. For the two-position displacement of the structure to be measured, the laser beam of the device can only be irradiated horizontally on the spot receiving and measuring device, so the laser transmitter and the spot receiving and measuring device must be on the same horizontal line; it cannot be used for sites with inclination angles, installation and use Even if it is installed on a horizontal plane, it is very difficult to debug and operate the laser beam to be completely horizontal to the light spot receiving and measuring device; secondly, the device must strictly adjust the positions of the camera equipment and the screen when performing benchmark debugging , so that the marks at the four corners of the screen are just in the camera range, and the requirements for operation and adjustment are high. Again, the device can only be placed in a fixed place and the laser transmitter must be installed downward for monitoring purposes, and the placement position cannot be changed arbitrarily. Unable to complete the detection of the measured points with different requirements

[0003] It can be seen that the methods and devices for deflection / displacement measurement in the prior art, although the image information system can be used to measure the displacement of bridge deflection and ground settlement, etc., do not consider the influence of temperature factors on the measurement accuracy. The resulting measurement error cannot be avoided, and it cannot be used normally when the light interference is strong

Therefore, the existing measurement methods and devices have a limited range of use, and have not overcome the influence of temperature differences on measurement accuracy, which restricts their real promotion and application in the detection and monitoring of bridge deflection, ground subsidence, and building subsidence.

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