A water level monitoring device and monitoring method based on optical time domain reflection of plastic optical fiber

Abstract

The invention relates to a water level monitoring device and monitoring method based on optical time domain reflection of plastic optical fiber, which includes a vertical pole fixed in the riverbed of the water body to be measured, and a plastic optical fiber water level detector, which is spirally wound around the vertical pole near the bottom position, the control box is installed near the top of the pole, and the control device is arranged inside. The solar panel is installed on the top of the pole, which is connected with the control device and provides power for the control device. The top of the control box is installed with a GPRS antenna. The control device is respectively connected with the GPRS antenna and the plastic optical fiber water level detector; the invention can realize remote and automatic monitoring, and is a water level monitoring device and measurement method for early warning of dangerous conditions.

Description

technical field [0001] The invention relates to a water level monitoring device and a monitoring method based on plastic optical fiber optical time domain reflection, belonging to the field of water level monitoring in the water conservancy industry. Background technique [0002] Water level is an important symbol reflecting the change of water body, the most basic observation quantity in hydrological survey, and one of the important environmental quantities for the safety monitoring of hydraulic structures. Water level data is the most important and basic hydrological information resource. It not only provides important data for water conservancy and water transportation, flood control and waterlogging control, but also provides indirect data for calculating other hydrological elements. Real-time on-line monitoring of the water level of the reservoir, so as to obtain the dynamic change information of the water level in a timely and accurate manner, can effectively avoid dan...

AI Technical Summary

Problems solved by technology

Among them, the float-type water pressure gauge uses the float to rise and fall with the water level, and records through mechanical transmission. Pressure principle, using pressure sensitive elements for sensing, no need for well logging, high sensitivity, but greatly affected by environmental factors such as temperature, water leakage is prone to occur for a long time, and real-time performance is difficult to guarantee; ultrasonic water level gauges use sound waves to reflect water levels at different interfaces , is a non-contact measurement with reliable performance and stable operation, but there are measurement blind spots and is easily affected by wind and waves; the radar water level gauge uses radar waves to measure the distance on the water surface. It is actually a radar range finder with high accuracy, but is easily affected by floating Influenced by objects, etc., resulting in unreliable measurement results

In addition, the above-mentioned water level gauges generally have problems such as high cost, difficult installation and maintenance, and some live components are susceptible to electromagnetic interference and even damaged by lightning strikes.

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