Movable dam seepage path weak magnetic detection data acquisition device and method

Abstract

The invention provides a movable dam seepage path weak magnetic detection data acquisition device and method. The device comprises a weak magnetic signal excitation device, a weak magnetic signal receiving device and a main control system. The weak magnetic signal excitation device is used for forming a current loop in a water body in a seepage path of a dam so as to excite and generate a weak magnetic signal. The weak magnetic signal receiving device comprises a balloon, a three-component magnetic receiving sensor carried on the balloon, and three winches which are located on the ground and can automatically take up and pay off stranded wires. The main control system is used for adjusting the length of the stranded wires of the winches, controlling the lift-off height of the balloon and processing the received weak magnetic signals. The device is not affected by terrain, data do not need terrain correction, the calculation workload can be greatly reduced, magnetic interference generated by using conductors such as magnetic metal can be effectively avoided, magnetic field intensity distribution and vertical magnetic field gradient distribution at different elevations are compared, multiplicity of interpretation results can be effectively reduced, and the working effect of treatment of penetration hidden dangers is greatly improved.

Description

technical field [0001] The invention relates to the field of dam engineering safety, in particular to a movable type dam seepage path weak magnetic detection data acquisition device and method. Background technique [0002] Dam engineering is an important part of my country's flood control system, and its safe operation is related to the safety of people's lives and properties on both sides of the dam. Since the founding of New China, especially after the flood of the Yangtze River in 1998, our country has built a large number of dams on major rivers. With the increase of the operating life, coupled with the influence of natural, social and human factors, some dam projects have different degrees of potential safety hazards, which have a serious impact on the quality, safety and healthy operation of the dams. [0003] Due to the small difference in physical properties, small size, wide distribution, and difficulty in detection, dyke seepage has become the top priority in the...

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Problems solved by technology

The detection of dam seepage paths has always been a difficult point in hidden danger detection, mainly in the following two aspects: First, the structural characteristics of dykes and dams make the elevation of measuring points at different positions vary greatly, and manual data collection is greatly affected by terrain, and the workload of data correction large, and cannot completely eliminate the influence of terrain, it is easy to generate false anomalies, which brings difficulties to data processing and analysis; secondly, if UAVs are used for data collection, since UAV components inevitably use metal parts that are prone to magnetic interference , and the high-speed rotation of the UAV's propeller will also generate magnetic interference

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