Tailings reservoir dry beach length measurement sensor based on tdr principle and its measurement method

Abstract

The invention discloses a TDR principle-based tailing pond dry beach length measuring sensor and a measuring method thereof. The sensor comprises a TDR measuring instrument, two wire cores and a bushing; the two wire cores are sleeved with the bushing provided with alternately-connected water tubes and joints, and are linearly and flatly laid to positions under the water level of a tailing pond from a tailing dam; the TDR measuring instrument is installed on the tailing dam; the TDR measuring instrument is utilized to measure the impedance of the two wire cores; the impedance of the two wire cores submerged by water will change; TDR data are analyzed; based on the length of the two wire cores, which is corresponding to each sampling interval of the calibrated TDR, the length of the two wire cores under the water level is recognized; a result obtained by subtracting the length of the two wire cores under the water level from the total length of the two wire cores, is the distance from the water level to the tailing dam; and the length of dry beach can be calculated out according to the known slope of the tailing dam. With the sensor and the measuring method thereof of the invention adopted, the length of the dry beach of the tailing dam can be measured accurately and conveniently, and the influence of dew and an aqueous solution which are attached onto the two wire cores, on a measurement result, can be eliminated.

Description

Technical field [0001] The invention belongs to the technical field of detection, and specifically relates to a dry beach length measurement sensor based on the TDR principle and a measurement method thereof, which can be used to measure the dry beach length of a tailing pond. Background technique [0002] The length of dry beach is an important indicator for the safety monitoring of tailings ponds. For a long time, there is no accurate and reliable method for measuring the length of dry beach. [0003] The long beach length measurement methods that have just been used are: [0004] 1. Slope inference algorithm [0005] The slope estimation algorithm is the most used method in the current online monitoring system for the length of the dry beach of the tailings pond. Its basic principle is: set up multiple profiles on the dry beach of the tailings pond, and each profile has 2 dry beach elevation monitoring points The first monitoring point is set at the top of the dry beach close to t...

AI Technical Summary

Problems solved by technology

[0008] Disadvantages of this method: when the dry beach is long, it is difficult to capture the diffuse reflection light of the bright laser line without a reflector

[0015] The seepage inversion method is used to measure the length of the dry beach. A piezometer is buried on the dry beach at a certain distance, and the length of the dry beach is inversely estimated according to the seepage line. However, this method is an indirect measurement and has poor timeliness. a time difference problem

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