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Vehicle dynamic measurement sensing device and method based on fiber-loop ring-down spectrocopy technology

A technology of dynamic measurement and sensing device, applied in measurement devices, devices that measure the time required to move a certain distance, radio wave measurement systems, etc. The effect of convenient signal detection and processing, improved monitoring sensitivity, and simple structure system

Active Publication Date: 2016-04-27
西安和其光电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the harsh application environment required by the sensor based on the interference principle, it is difficult to promote and apply it outdoors

Method used

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  • Vehicle dynamic measurement sensing device and method based on fiber-loop ring-down spectrocopy technology
  • Vehicle dynamic measurement sensing device and method based on fiber-loop ring-down spectrocopy technology
  • Vehicle dynamic measurement sensing device and method based on fiber-loop ring-down spectrocopy technology

Examples

Experimental program
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Embodiment

[0101]The pulse light source of the present invention has a repetition frequency of 1MHZ and a pulse width of 10ns. The sensor head adopts a microbend structure, and can also be other special optical fibers, such as D-type optical fibers, photonic crystal optical fibers, bare optical fibers, etc.; the ring resonant cavity adopts "racetrack" optical fibers Ring resonant cavity, the coupling ratio of the two couplers is 1:99, the transmission fiber adopts multimode fused silica fiber (core refractive index 1.58), the entire ring resonant cavity length is 10m, and the distance between the two sensing heads is 1m; others Including lead-in and lead-out fiber optics, photodetectors, oscilloscopes, and computers.

[0102] The pulsed light source produces light waves with a repetition frequency of 1MHz (period 1us) and enters the "racetrack" fiber optic ring resonator through the imported fiber. The time for the light wave to circle in the ring resonator is about 53ns, and the ring-dow...

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Abstract

The present invention discloses a vehicle dynamic measurement sensing device and method based on the fiber-loop ring-down spectroscopy technology, belonging to the field of fiber sensing and vehicle dynamic measurement. The device comprises a pulse light source, a lead-in fiber, couplers, sensing heads, a transmission fiber, a lead-out fiber, a photodetector, an oscilloscope and a computer for data processing. The couplers also comprise a No.1 coupler and a No.2 coupler. The sensing heads comprise a No.1 sensing head and a No.2 sensing head. A ring resonator is formed by the No.1 coupler, the No.1 sensing head, the No.2 sensing head, and the No.2 coupler through a transmission fiber group. The vehicle dynamic measurement sensing device and the method have the advantages of a simple structure, a novel method, high measurement accuracy and good repeatability, the vehicle dynamic weighing and speed monitoring can be realized, and the device and the method have a broad application prospect in the field of road traffic real-time monitoring.

Description

technical field [0001] The invention relates to an optical fiber ring cavity ring-down spectrum technology and a dynamic measurement sensor device for dynamic weighing and speed monitoring of vehicles, in particular to a vehicle dynamic measurement sensor device and method based on optical fiber ring cavity ring down technology, which belongs to optical fiber Sensing and vehicle dynamic measurement field; the device of the present invention is a dynamic measurement sensing device based on the combination of optical fiber ring cavity ring-down spectrum technology, vehicle dynamic weighing technology and speed monitoring technology. Background technique [0002] Highway is an important economic lifeline of a country, and the informatization of the transportation industry is currently in a stage of rapid development. Realizing automatic detection and real-time monitoring of motor vehicles is an indispensable means to realize traffic informationization. As for the weighing of v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G19/03G01G3/12G01P3/68
CPCG01G3/125G01G19/03G01P3/68
Inventor 阮驰王允韬杨松林
Owner 西安和其光电科技股份有限公司
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