Optical fiber detection device for monitoring flowing direction and flowing speed of underground water in observation well

Abstract

The invention discloses an optical fiber detection device for monitoring the flowing direction and the flowing speed of underground water in an observation well. The device comprises a device shell (1); an electronic compass (3) is movably arranged in the device shell (1); the lower part of the electronic compass (3) is connected with a connecting pipe (7); the lower part of the connecting pipe (7) is connected with a steering fan (6) in a vertical direction; the center of the electronic compass (3) is hollow, a steel pipe (8) penetrates through the center of the electronic compass (3) and isfixedly connected with the device shell (1) and used for fixing an optical fiber (2), the steel pipe (8) and the optical fiber (2) penetrate through the connecting pipe (7), and the lower end of the device shell (1) is connected with an optical fiber support (10) used for fixing a lower endpoint of the optical fiber (2). The optical fiber detection device for monitoring the flow direction and theflow speed of the underground water in the observation well is low in cost, not prone to being interfered by the surrounding electromagnetic environment and more accurate and stable by being comparedwith a common probe.

Description

technical field [0001] The invention relates to an optical fiber detection device for monitoring the flow direction and velocity of groundwater in an observation well, and belongs to the technical field of hydrogeological parameter monitoring. Background technique [0002] The groundwater observation well of the dam can observe the hydrogeological conditions near the dam for us. At present, there are many methods for measuring the flow direction of the groundwater. The traditional methods mainly include the pumping test method and the tracer method. These methods are not suitable for single Well monitoring is time-consuming and labor-intensive. The tracer method includes radioisotope tracer method, potential difference method, thermal tracer method, etc. The radioactive substances required by the radioisotope tracer method may cause harm to the human body and the environment. The tracer used in the tracer method can undergo physical and chemical reactions such as ion excha...

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Problems solved by technology

In addition, technologies such as neutron activation, but the cost of neutron activation is high and protective measures need to be taken

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