Optic fiber grating wheel shaft identifying system

A wheel axle identification and fiber grating technology, which is applied in the coupling of optical waveguides, measuring devices, instruments, etc., can solve the problems of complex processing circuits, susceptibility to electromagnetic interference, and short service life, and achieve long-term stability and long service life , sensitivity and accuracy improvements

Active Publication Date: 2007-06-27
WUHAN WUTOS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of system is susceptible to electromagnetic interference, easy to be corroded when working in a humid environment, short service life, high failure rate, and poor reliability
Moreover, such systems often have problems such as many connections and complicated back-end processing circuits.

Method used

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  • Optic fiber grating wheel shaft identifying system

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Embodiment Construction

[0017] The technical solutions and implementation principles of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] The structure of the fiber grating wheel shaft recognition system of the present invention is as shown in Figure 1, comprises: light source (LED1), optical power meter PD2, coupler 3, fiber grating wheel shaft recognition sensor 4. 12 completely identical fiber grating wheel shaft recognition sensors Arrange them equidistantly into a line array, and connect them in series as described above. The start and end of each optical path is connected to the coupler and the light source LED and the optical power meter PD.

[0019] For a certain optical path, the light is emitted from the LED, passes through the axle identification sensor, and the fiber grating reflects the light of a certain wavelength. When the light wave passes through the remaining identification sensors, the set fiber grating parameters are exa...

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Abstract

In the invention, 12 pieces of wheel axle recognition sensor (WARS) of optical fiber grating (OFG) are adopted as sensing part. LED is as light source. Using optical power meter carries out signal detection. The sensing part, the light source, and the optical power meter are connected through optical fiber to constitute an integrated wheel axle recognition system. According to certain combination mode, WARSs are cascaded to form 4 pieces of independent optical path. When wheel axle passes through WARS, change of Bragg reflection wavelength of OFG in corresponding WARS takes place; and the change changes reflected light intensity of entire optical path. Based on number of optical path, where light intensity changes, the system can determine number of tyre. Advantages are: simple structure, stable, accurate recognition, anti electromagnetic interference etc. The invention is applicable to weighting and charging system, over loading transportation management system etc. in toll station.

Description

technical field [0001] The invention relates to a vehicle weighing and axle identification system based on optical fiber gratings, in particular to the dynamic detection of the number of vehicle tires and the number of axles, and is mainly used in the fields of road toll stations for charging by weight, over-limit transportation, automatic vehicle classification systems, etc. , technical background [0002] The role of the axle recognition system is to correctly judge whether each side of the passing axle is a single wheel or a double wheel, and at the same time, together with the weighing platform, determine whether the axle type is a single axle, a double axle or a triple axle. In the prior art, according to the different detection components used, it can be divided into two categories: load cell type and non-contact switch type. Relatively speaking, due to the mechanical movement of the contact switch type, the waterproof requirement is particularly high, and it is also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/34G07B15/00G01M17/00G07B15/06
Inventor 张东生姜德生王立新李微范典李维来
Owner WUHAN WUTOS
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