Time-domain reflectometry waveguide structure

Abstract

The invention relates to a time-domain reflectometry waveguide structure comprising a control module, a waveguide sensor, a protective kit and an insulator. The control module is used to transmit a sensing signal and receive a reflected signal fed back by the sensing signal. The waveguide sensor is electrically connected with the control module and comprises a first probe connected with the control module, a bent probe in bent connection to the first probe, and a second probe extending from the bent probe. The protective kit coaxially sleeves the first probe and exposes the bent probe. The sensing signal passes through the first probe by means of the protective kit without being disturbed and is transmitted to the bent probe and the second probe to obtain the reflected signal. The insulator coats the waveguide sensor and protective kit in order to avoid interference of foreign matters and to facilitate measurement, and can measure the environmental parameters of different media.

Description

technical field [0001] The invention relates to a device for measuring the depth of an underwater object, in particular to a waveguide structure for measuring the depth of an underwater object by means of time domain reflection. Background technique [0002] Time Domain Reflectometry (TDR) is a method of monitoring and probing using the transmission of electromagnetic waves. The electromagnetic wave transmission system uses a waveguide as a signal transmission and sensing element. The design of the waveguide is mainly to convert the environmental change parameters to be monitored into the transmission signal changes (reflection signals) of the waveguide, so as to obtain the environmental change parameters through the reflection signals. The actual implementation is to measure the travel time of the reflected signal generated by the electromagnetic wave at different environmental interfaces, and then locate the signal discontinuity position by calculating the electromagnetic...

AI Technical Summary

Problems solved by technology

[0003] However, due to the multiple reflections of electromagnetic waves in the process of monitoring transmission (such as from air into water), it is difficult to distinguish the reflected signals of the environmental parameters to be measured.

In addition, the process of electromagnetic wave transmission is often susceptible to interference from foreign objects, resulting in signal attenuation

More importantly, when the electromagnetic wave passes from a high dielectric coefficient environment (such as water) to a low dielectric coefficient environment (such as soil, sludge, etc.), total reflection will occur, resulting in the inability to detect low dielectric coefficient environmental parameters

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