A closed-loop control near-ground water source detection device and detection method

Abstract

The invention belongs to the technical field of geophysical prospecting instruments, and especially relates to a closed-loop control near-surface water source detection device and method. The device comprises an H-bridge circuit power supply module, an H-bridge circuit, a load, a current collection module, an FPGA given signal generation module, and a ring width comparison circuit. The H-bridge circuit power supply module is connected with the H-bridge circuit. The H-bridge circuit, the load, the current collection module and the ring width comparison circuit are sequentially connected to form a closed-loop control structure. The FPGA given signal generation module is connected with the ring width comparison circuit, and a given signal generated by the FPGA given signal generation module is compared with a feedback signal generated by the current collection module in the ring width comparison circuit, so as to drive the on / off of the H-bridge circuit, thereby driving the load to generate a near-surface water source detection signal. On the basis of the magnetic resonance principle, the device controls the on / off of the H-bridge circuit in the closed-loop manner, stabilizes the control signal, effectively reduces the switching current, and provides reliable support for the implementation of the detection of a near-surface water source.

Description

technical field [0001] The invention belongs to the technical field of geophysical detection instruments and equipment, and in particular relates to a closed-loop control near-earth water source detection device and detection method. Background technique [0002] With the rapid development of my country's economy and society, my country's demand for fresh water resources continues to increase. my country is originally a country that lacks fresh water resources, especially in the northwest region. The lack of fresh water resources not only affects people's daily life, but also has a huge impact on the development of industry and economy. It is urgent to find the fresh water resource. In the process of detecting water resources, there are very mature methods for detecting deep groundwater. These methods mainly include: high-density resistivity method, induced polarization method, transient electromagnetic method, and ground nuclear magnetic resonance method. The NMR detecti...

AI Technical Summary

Problems solved by technology

In the actual measurement, there will be a near-earth detection blind area, and the near-earth detection data will be lost

Images