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Fiber Bragg grating type rainfall monitoring method and device

A fiber grating and monitoring device technology, applied in measuring devices, rainfall/precipitation gauges, meteorology, etc.

Active Publication Date: 2014-05-21
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature research and patent novelty search show that there is currently no system for monitoring atmospheric precipitation based on fiber grating sensing technology

Method used

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  • Fiber Bragg grating type rainfall monitoring method and device
  • Fiber Bragg grating type rainfall monitoring method and device
  • Fiber Bragg grating type rainfall monitoring method and device

Examples

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Embodiment

[0075] Embodiment. This example is a kind of monitoring device and construction method thereof, and its composition is as follows Figure 1-Figure 6 shown. Field experiments were carried out in the Puba River Basin, Tanhe Township, Chengxian County, Longnan City, Gansu Province, and the Langping River Basin, Langping Town, Changyang Tujia Autonomous County, Hubei Province. The Puba River Basin belongs to the typical mountainous warm temperate humid monsoon climate type. The annual precipitation can reach 800-1000 mm. Affected by the monsoon, it has the characteristics of cold winter, hot summer, continuous rain in spring and autumn, high humidity and abundant rainfall. The precipitation is mostly concentrated in July to September, accounting for 50-50% of the annual precipitation. 70%. The Langping River Basin belongs to a typical subtropical humid monsoon climate zone. The annual precipitation can range from 1100 to 1600 mm, the daily rainfall can range from 100 to 188 mm, a...

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Abstract

The invention provides a fiber Bragg grating technology based rainfall monitoring method and device. The gravity of the rain water is converted into the strain of beams through stress of the equal-strength cantilever beams and then converted into the change of Bragg wavelengths of fiber gratings, the change quantity of the wavelengths of the fiber gratings is detected through a demodulation instrument, and accordingly the measurement on the atmospheric rainfall can be achieved. According to the fiber Bragg grating type rainfall monitoring device, a cable (9) is leaded out of an electric overflow valve (5) which is arranged in a fiber Bragg grating rain gauge; an optical cable (10) is leaded out of a fiber Bragg grating strain sensor (8); the cable (9) is connected with a control unit module (11); the optical cable (10) is connected with the fiber Bragg grating demodulation instrument (12); output of the control unit module (11) and the fiber Bragg grating demodulation instrument (12) is connected with input of a lower computer (13); output of the lower computer (13) is connected with a wireless communication module I (14); output of a wireless communication module II (15) is connected with input of an upper computer (16). According to the fiber Bragg grating type rainfall monitoring method and device, the monitoring on the atmospheric rainfall can be high in sensing accuracy, high in measurement accuracy, low in cost and automatic and real-time.

Description

technical field [0001] The invention relates to a rainfall monitoring method and device based on optical fiber grating technology, and relates to the technical fields of liquid level measurement and meteorology. Background technique [0002] Atmospheric precipitation measurement is an important link in many aspects such as climate change, geological disasters, flood disaster warning and environmental assessment. At present, the more commonly used rainfall monitoring technologies mainly include tipping bucket rain gauge and siphon rain gauge. Among them, the tipping bucket rain gauge is simple in principle and stable in performance, but the dynamic measurement error of the tipping bucket changes drastically with the change of rain intensity. This defect is the inherent principle and structural defect of the tipping bucket rain gauge, and is easily affected by random factors in use. (Such as: residual water in the tipping bucket, residual sediment in the tipping bucket, influ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14
CPCY02A90/10
Inventor 韩冰谭东杰马云宾李亮亮荆宏远郝建斌郑军刘建平
Owner PIPECHINA SOUTH CHINA CO
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