Seepage line measuring set for two-wire system reservoir dam

Abstract

The invention discloses a measuring device of a two-wire system reservoir dam seepage line, comprising a plurality of field signal measurement receiving and transmitting units and a main controller, a plurality of the field signal measurement receiving and transmitting units are connected in parallel by two buses connected with the main controller, the bus is a cable with a shielding layer which is grounded; the input terminal of a carrier signal reshaping amplifying circuit A of the main controller is connected with the buses, and the output terminal thereof is connected with a phase-lock loop frequency decoding circuit A; thunder and light surge absorbing circuits of the field signal measurement receiving and transmitting units are arranged between the buses in a bridge connection way, the other terminals are grounded; the input terminal of a DC-DC power supply converter is connected with the buses, and the output terminal thereof is connected with a microprocessor B and a carrier signal reshaping amplifying circuit B; a liquid level sensor is placed inside a piezometer tube. As the two-wire structure is adopted, both power supply and data transmission are completed on the same bus, thus simplifying the work of tube-perforation and wire-distribution, reducing material consumption and civil work amount, and reducing the probability of suffering induction lightning stroke.

Description

technical field [0001] The invention relates to a device for measuring the seepage line of an earth-rock dam in a reservoir, in particular to a device for measuring the seepage line of a two-line dam body. Background technique [0002] Reservoir dams made of earth and rocks all have different degrees of leakage. When the upstream water level changes, the flooding depth of the dam body also changes. This flooding depth has different values ​​at different positions of the dam body and varies along the The section of the dam body forms a distribution, and this distribution is the wetting line of the dam body. It is an important index to measure the safety of reservoir engineering operation. According to the national reservoir earth-rock dam safety monitoring regulations, reservoir managers must conduct manual observations on a regular basis in order to draw the infiltration line of each section of the dam body, and evaluate whether the reservoir engineering is safe or not. [...

AI Technical Summary

Problems solved by technology

It can be seen that such a system structure requires a large amount of civil engineering and high project cost; on the other hand, due to the large number of cables, the probability of induced lightning strikes also greatly increases

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