System and method for measuring sediment concentration in water body by using optical fiber sensor
An optical fiber sensor, water body technology, used in measurement devices, scientific instruments, suspension and porous material analysis, etc., can solve the problems of low detection accuracy, dark sand particles, and poor focusing performance than optical instruments, and achieve high detection reliability. The effect of noise ratio and quantitative accuracy, imaging precision, and sensitive sensing signal
Active Publication Date: 2021-09-28
XIAN UNIV OF TECH
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Problems solved by technology
The focusing performance of this kind of transducer is far inferior to that of optical instruments, and the detection accuracy is small. When imaging sediment particles, the resulting light spots are large, and the resolution of the resulting sediment particle images is low, and it is impossible to identify particles under high sediment concentration conditions. For sediment particles, the color purity of the image is easy to be saturated, and the resulting sediment particles have darker spots, which cannot be accurately distinguished from the background, so most of them can only be used for sediment measurement work under low concentration conditions, and the measurement concentration range is about 5g / l -10g / l, and the test results are greatly affected by the size and speed of sediment particles
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[0037] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0038] The system for measuring high-concentration sediment content by sensing ultrasonic imaging with an optical fiber sensor in the present invention includes: an ultrasonic transducer, an optical fiber sensor, a data processing module, and a light source.
[0039] Ultrasonic transducers are used to emit ultrasonic waves into water bodies;
[0040] The light source is used to provide incident light for the fiber optic sensor;
[0041]The optical fiber sensor is used to receive the incident light of the light source and perceive the ultrasonic signal emitted by the ultrasonic transducer reflected by the sediment in the water body, and output the optical signal to the data processing module;
[0042] The data processing module receives the optical signal output by the optical fiber sensor, a...
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Abstract
The invention provides a system and a method for measuring the sediment concentration in a water body by using an optical fiber sensor. The system comprises an ultrasonic transducer, the optical fiber sensor and a data processing module, the ultrasonic transducer is used for transmitting ultrasonic waves into the water body; the optical fiber sensor is used for receiving incident light, sensing an ultrasonic signal generated after the ultrasonic wave emitted by the ultrasonic transducer is reflected by the sediment in the water body, and outputting an optical signal to the data processing module; and the data processing module receives the optical signals output by the optical fiber sensor, compares the phase and polarization form changes of the optical signals before and after the ultrasonic transducer works, and processes to obtain the sediment concentration in the water body. According to the invention, the sediment measurement work of a water sample under the condition of high sediment concentration can be realized, and the measurement range of the sediment concentration is 10g / l to 500g / l.
Description
technical field [0001] The invention belongs to the technical field of water conservancy engineering, and relates to a system and a method for measuring sediment concentration in a water body by using an optical fiber sensor. Background technique [0002] The sediment content in natural water bodies is related to many issues such as water conservancy machinery, agricultural irrigation, river course evolution, navigation of waterways, and ecological environment. Dynamic measurement and calibration of sediment content is crucial. The determination of sediment content in water body is one of the important indicators of water quality monitoring. Especially in the northwest region of our country, the high sediment concentration of the Yellow River has always been concerned by many hydraulic scholars. [0003] At present, the measurement of sediment concentration is mainly divided into three categories. The first is the traditional water sampling method. On several representat...
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IPC IPC(8): G01N15/06
CPCG01N15/06G01N2015/0003G01N15/075
Inventor 王雯程冲魏启航李占斌李鹏夏朝辉杨静安孙佳乾张训乐
Owner XIAN UNIV OF TECH