Method for detecting and monitoring displacement/deflection

Abstract

The invention discloses a displacement-deflection detecting and monitoring device and method, which comprises the following parts: laser launcher, receiving disposal device and software presetting computer, wherein the receiving disposal device is composed of image equipment and image panel; the image equipment connects the computer through circuit; the projection panel is set in the lens end of image equipment; the laser launcher is set in the reference detected point, which aligns the projection panel of receiving disposal device to keep the projection panel and laser beam basically vertical; the precision staff scale film is attached on the back of semi-reflection projection face; when the detected point moves, the projected laser flare offsets on the projection panel simultaneously; the image equipment picks up the flare signal and sends the signal to the computer, which counts the displacement with respect to the zero point. The invention is fit for detecting and monitoring the bridge deflection, ground sedimentation, mountain shift, building subsidence and shift.

Description

technical field [0001] The invention relates to a displacement / deflection detection and monitoring device and method for detecting and monitoring bridge deflection, ground subsidence, mountain movement, building subsidence and movement, especially a displacement / deflection detection and monitoring device and method using a laser source. Background technique [0002] Detecting bridge deflection, ground subsidence, mountain movement, building sinking and movement plays an important role in modern roads and bridges and buildings. In the prior art, there are more and more methods and devices for detecting and monitoring bridge deflection and mountain movement, such as the latest Chinese patent 200510059624.1 "a method and device for measuring slope surface displacement" and 200510020375.5 "two-dimensional, large-scale Long-range laser deflection / displacement measurement method and device", the former uses an angular displacement sensor with small rotational torque and high sensi...

AI Technical Summary

Problems solved by technology

The latter 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 to form a spot, the spot and the mark are imaged by the camera equipment, and then the center of gravity position of the laser spot and the image of the light-emitting diode are calculated. The relative distance of the current spot is obtained, and the coordinates are subtracted from the initial value to obtain the displacement value of the current spot, and the two-digit displacement of the measured structure is obtained; 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, and the range of installation and use is limited. Even if it is installed on a horizontal plane, the laser beam is required to be completely horizontal to the spot receiving and measuring device. Debugging and operation are also very difficult; secondly, the device must strictly adjust the position of the camera equipment and the screen when performing benchmark debugging, so that the marks at the four corners of the screen just enter the camera range, and the requirements for operation and adjustment are high. Again, the device It can only be placed in a fixed place and the laser transmitter must be installed downwards for monitoring purposes. The placement cannot be changed arbitrarily, and the detection of the measured points with different requirements cannot be completed. Moreover, the device can only monitor the static deflection, not the Dynamic deflection

[0003] As mentioned above, the scope of use of these two measuring devices and methods is limited, and the installation and debugging are difficult, which seriously restricts their real promotion and application in the detection and monitoring of bridge deflection, ground subsidence, mountain movement, building sinking and movement, etc.

Images