Optical fiber raster dynamic weigher for vehicle axle weight

Abstract

The present invention relates to a fiber-optic grating vehicle axle-weight dynamic weighing equipment. It includes a laser light source, the output end of said laser light source is connected with first end of fiber-optic coupler, the third end of said fiber-optic coupler is connected with fiber-optic grating wavelength demodulation module, then successively series-connected with photoelectric conversion module, data acquisition equipment and industrial control machine, and they are placed in one machine shell interior. Said invention utilizes fiber-optic grating pressure sensing head, hydraulic valve block and hydraulic soft tube array to form hydraulic pressure sensing mechanism. The described fiber-optic grating pressure sensing heat is made up using epoxy polyester to make the optical fibers of two ends of sensing grating be fixed on a metal elastic film, the described metal elastic film is stuck on the described hydraulic valve block, the described hydraulic valve block is communicated with hydraulic soft tube, and the second end of the described fiber-optic coupler is connected with optical fibre of the described sensing grating.

Description

technical field [0001] The invention relates to an optical fiber grating, in particular to an optical fiber grating vehicle axle load dynamic weighing device. It is mainly used in the management of vehicle overweight and vehicle weight charging system. Background technique [0002] In recent years, the phenomenon of over-limit and overloading of road transport vehicles in our country is very common. In severe areas, almost all freight vehicles have over-limit and overloading behaviors to varying degrees. The over-limit and overloaded transportation of vehicles has caused great harm to traffic safety, transportation market, vehicle production order and road and bridge infrastructure. On April 1, 2000, the Ministry of Communications promulgated and implemented the "Regulations on the Administration of Over-limited Transport Vehicles Driving on Highways", which clearly defined the boundaries of overloading and over-limiting, and provided a unified and standardized scale for re...

AI Technical Summary

Problems solved by technology

my country's dynamic weighing of vehicles started relatively late, starting in the early 1980s, and the earliest research was the Chongqing Highway Research Institute. At present, there are more than 20 related units in China engaged in research in this area. Since the systems developed in China all use Traditional dynamic weighing technology has inherent defects: slow test response, low test accuracy and huge sensing mechanism, etc.

Because the piezoelectric sensor is sensitive to electromagnetic interference, its reliability is greatly reduced in bad road conditions

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