A landslide horizontal displacement vertical distribution sensor assembly and using method

Abstract

The invention relates to a vertical distribution sensor assembly for horizontal displacement of landslide and an application method. The sensor assembly comprises a hand-held terminal, an outgoing waterproof signal wire, measuring units, a deformation coupling PCB (printed circuit board) and a support and protection structure, wherein the hand-held terminal is an MCU (microprogrammed control unit) system, each measuring unit is a complete function circuit realizing attitude measurement on a single measuring point, wires penetrating through the deformation coupling PCB are arranged on the deformation coupling PCB and communicated with weld plates at two ends of the board, and ripples are pressed in the middle of the circuit board; and the measuring units are welded with the deformation coupling PCB through the weld plates. The sensor assembly is formed by a plurality of measuring units through structural series connection and electrical parallel connection, and each unit is independently coded and exchanges data with the hand-held terminal through a CAN (controller area network) bus, so that work of other measuring units is not influenced when one measuring unit has fault. According to the application method, when data acquisition is performed, all that is required is to connect the waterproof signal wire with the hand-held terminal, data acquisition can be completed automatically, the operation is simple, data acquisition efficiency is high, and repeatability is good.

Description

technical field [0001] The invention relates to a sensor assembly related to the vertical distribution monitoring of landslide horizontal deformation and a usage method, in particular to a landslide horizontal displacement vertical distribution sensor capable of accurately coupling with rock and soil deformation and capable of withstanding relatively large deformations The assembly and the use method belong to the field of geological disaster monitoring and prevention. Background technique [0002] Landslides are a serious geological hazard worldwide. With the increasing frequency of human engineering activities, landslide geological disasters are becoming more and more frequent and causing more and more losses. In order to effectively prevent and control landslides, domestic and foreign scholars and engineers have conducted a large number of experimental studies on landslides, and tried to predict them, among which the monitoring of landslide displacement is an important mo...

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Problems solved by technology

GPS displacement measurement can only measure the deformation of a single point on the ground, and cannot complete the measurement of local deformation below the ground

The displacement measurement of the inclinometer hole is widely recognized among the existing measurement methods and can reflect the landslide deformation more realistically. However, this measurement method needs to manually transport the inclinometer to the site for measurement each time. The measurement process is complicated and time-consuming. The measurement results will also have large random errors due to the differences in the operations of different operators, and when the landslide is about to slide, the inclinometer can not be lowered due to the large deformation of the inclinometer tube, and the safety of the surveyors cannot be guaranteed.

Fiber Bragg grating buried measurement is a new landslide displacement measurement method, which can realize real-time measurement in measurement, but due to the imperfect application technology, its measurement results are greatly affected by the buried method, and because it is based on the reference plate, The strain of the column, pipe or even the line is used to measure the converted displacement. In principle, the fiber grating must be in a tensioned state when it is buried, so that the fiber grating is easily broken when deformed. When the rock and soil are soft, The deformation of the rock and soil mass may be sheared by the reference plate, column, pipe or line and cannot reflect the real deformation of the landslide mass

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