Urban deep underground space electrical source towed electromagnetic detection device and method
A technology of electromagnetic detection and electrical source, applied in the direction of measuring device, electric/magnetic exploration, geophysical measurement, etc., which can solve the problems of limited application of urban measurement
Active Publication Date: 2020-10-20
JILIN UNIV
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[0003] The technical problem to be solved by the present invention is to provide an electric source towed electromagnetic detection device and method in urban deep underground space, which is used to solve the problem of limited application in urban surveying
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[0061] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0062] See figure 1 It shows a schematic diagram of a launch system of an electric source towed electromagnetic detection device in deep urban underground spaces of the present invention; a launch system of an electric source towed electromagnetic detection device in deep urban underground spaces, the system includes: a main control module 1. Battery 2, GPS module 3, host computer 4, switch drive module 5, switch module 6, three-phase generator 7, three-phase controllable rectifier source 8, DC-DC module 9, protection diode 10, PWM drive module 11 , H-bridge transmitting module 12, grounding long wire 13, current sensor 14...
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The invention relates to an urban deep underground space electrical source towed electromagnetic detection device and method. The device comprises a transmitting system disposed at a peripheral regionof an urban region, and a transmitting system carried by a trailer in the urban region, and the trailer moves along a set measuring line of the urban region. The transmitting system comprises a grounding long wire, and a primary field is generated through excitation of the grounding long wire. A receiving system comprises a three-component receiving coil for receiving a secondary field signal. Compared with a towed transient electromagnetic center loop device used in a city, the towed transient electromagnetic detection device has the advantages that the emission magnetic moment is large, thedetection depth can reach 500 m or even deeper, the problem that the depth is insufficient in a small loop excitation mode is solved, and the geological condition is explored for urban underground deep development and utilization.
Description
technical field [0001] The invention relates to the field of geophysical prospecting electromagnetic detection, in particular to an electrical source dragging type electromagnetic detection device and method in deep urban underground spaces. Background technique [0002] With the increase of urban resident population, urban space resources are becoming more and more tense, and the safe and reasonable development and utilization of urban underground space has become an important issue to be solved urgently in large and medium-sized cities in my country. Blind exploitation of underground space is prone to problems such as pipeline breakage and landslides. In order to avoid these dangers, it is necessary to use non-destructive means to detect underground information first. As an important non-destructive geophysical exploration method, ground transient electromagnetic method has the advantages of convenient working mode and large detection depth in urban underground space detec...
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IPC IPC(8): G01V3/08
CPCG01V3/083
Inventor 林君严复雪张洋陈健
Owner JILIN UNIV