A continuous automatic monitoring device for surface deformation in permafrost regions

Abstract

The invention discloses a continuous automatic monitoring device for surface deformation in a frozen soil area, which is applied in the fields of geography and surveying and mapping. By selecting a deep borehole in a frozen soil area as a reference point, a high-precision linear displacement sensor is used to measure the surrounding ground surface relative to the reference point. The height change can be used to obtain the natural surface deformation. The deformation sensor responds to the displacement through the electrical signal, which can make the deformation observation achieve higher accuracy, and the error can be as low as 0.01mm; and because the sensor is durable and has strong environmental adaptability, it can It is better to carry out long-term monitoring tasks in areas with harsh and complex environments such as permafrost regions; and complete data transmission and acquisition and communication with sensors based on the Internet of Things. The device solves the problems of poor deformation accuracy, low time resolution and high cost in the past in permafrost regions, and realizes continuous monitoring of surface deformation with high precision and high time series and automatic data transmission and acquisition.

Description

technical field [0001] The invention relates to monitoring of surface deformation variables, and belongs to the technical fields of surveying and mapping and geographic information, in particular to a continuous automatic monitoring device for surface deformation in frozen soil regions. Background technique [0002] The surface of the permafrost region has a surface deformation phenomenon marked by "frost heaving and thawing". That is, when the water is frozen to the ice in winter, although the compressibility becomes smaller and the strength is higher, the volume will expand and form a ground surface. Uplift and foundation bulging; in summer, the skeleton support function of ice debris in rock and soil disappears during the process of ice to water, the volume shrinks, the compressibility increases, and rock and soil sink and sink; in addition, there is generally underground ice in the upper limit of permafrost Under the influence of current climate change, the melting of un...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a device that can continuously and automatically monitor surface deformation in permafrost regions, solve the problems of low time resolution, poor accuracy and high cost of data obtained in the past, and realize high time series continuous monitoring of data and automatic data transmission , which reduces the cost of observation and collection, and at the same time avoids human error, making the acquired data more real and accurate

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