Three-dimensional electromagnetic imaging device applied to road disaster and collapse detection and use method thereof

Abstract

The invention discloses a three-dimensional electromagnetic imaging device applied to road disaster and collapse detection and a use method thereof. The device is formed by a transmitting part, a receiving part, an acquisition device and a processing system. The GPS timing synchronization is carried out between the transmitting part and the receiving part. The processing system is installed in electronic equipment. The acquisition device is a rectangular body and is provided with a center plate. The center plate is provided with sensors and is provided with four extending brackets outward. The ends of the extending brackets are provided with auxiliary brackets which are wound by multiple turns of transmitting coils. The electronic equipment can be used in a field to carry out real-time imaging, simple real-time processing and feedback of construction quality information, the ability of penetrating and distinguishing low resistance coverage is low, a high resistance shielding phenomenon does not exist, a hole or soft stratum in a road can be effectively explored, the interference of atmospherics and an artificial electromagnetic field from the outside is reduced, the electromagnetic coupling effect between the transmitting coils and receiving coils can be effectively eliminated, the equipment is small, the weight is small, and the device is suitable for being used in cities and high speed roads.

Description

technical field [0001] The invention relates to the technical field of geological and mineral exploration equipment, in particular to a three-dimensional electromagnetic imaging device and a using method for road disaster and subsidence detection. Background technique [0002] The concept of informatization in geological and mineral exploration work in my country was put forward in the mid-1980s, and was promoted by the Ministry of Geology and Mineral Resources as a national project. Since the “Digital Earth” (Core, 1998) was proposed abroad, the informatization project of geological and mineral exploration in my country has been accelerated due to its inclusion in the “Digital China” (Xu Guanhua et al., 1999) and “Digital Land” (Zhang Hongtao, 2001) projects. carried out, but so far has not been clearly defined. [0003] The informatization of geological and mineral exploration work is not a simple application of geological information technology, but involves a more profou...

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Problems solved by technology

[0006] In the current existing technologies, the detection methods for road disasters and subsidence are relatively simple. The main problems are that the work is too hard and the work is dangerous. It usually requires the manual investigation of field geologists and frequent dangers. The existing The working method is to drill directly on the road surface, and then judge whether there is a cavity or a soft soil layer under the road surface according to the drilling data, and the work efficiency is low. However, the relatively good technologies usually used in the current prior art, such as spectral electromagnetic method and The direct current method has very limited ability to penetrate and distinguish low-resistance coverage, and often produces high-resistance shielding phenomena, which cannot effectively detect holes or soft strata on the road

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