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Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method

A railway freight car and optical fiber detection technology, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of weak anti-electromagnetic interference, poor corrosion resistance, and low speed, and achieve easy networking, high sensitivity, and long life. Effect

Inactive Publication Date: 2010-03-17
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of low precision, weak anti-electromagnetic interference ability, poor corrosion resistance and low speed in the traditional railway overload and partial load detection device, the present invention provides an online high-speed monitoring non-foundation optical fiber detection of railway freight car overload and partial load device and method

Method used

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  • Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method
  • Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method
  • Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 and image 3 Description of the present embodiment, the device for detecting overload and eccentric loading of railway wagons with no foundation pit optical fiber, it consists of a light source 5, a coupler 4, ten fiber Bragg grating strain sensors 3-1, 3-2, ..., 3-9 and 3-10, spectroscopic device 7, wavelength demodulation device 8, data collector 9 and analysis and processing device 10, the first fiber Bragg grating strain sensor 3-1, the second fiber Bragg grating strain sensor 3-2 , ..., the ninth Fiber Bragg Grating strain sensor 3-9 and the tenth Fiber Bragg Grating strain sensor 3-10 are sequentially connected end to end and connected in series through the transmission fiber 6, ten Fiber Bragg Grating strain sensors 3 -1, 3-2,..., 3-9 and 3-10 are welded on a section of rail between two sleepers, and every two fiber Bragg grating strain sensors are welded symmetrically on the upper rail of the left and right rai...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ten Fiber Bragg Grating strain sensors 3-1, 3-2, . . . , 3-9 and 3-10 have different reflections wavelength, the light source 5 is a broadband light source.

[0015] The optical signal band of the broadband light source 5 is wide enough to cover the reflection wavelengths of ten FBG strain sensors 3 and the wavelength offset of each FBG strain sensor 3 , between every two adjacent FBG strain sensors 3 The wavelength interval is larger than the offset of the maximum allowable off-load value in the wavelength of the reflected signal, so that the reflected wavelengths will not overlap.

specific Embodiment approach 3

[0016] Specific implementation mode three: combination figure 2 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is that each wavelength demodulation device 8 is composed of a piezoelectric ceramic 15, an unbalanced interferometer 11, a sawtooth wave signal generator 14, a photodetector 12, a phase The detector 13 and the A / D conversion device 16 are composed, the signal output end of the spectroscopic device 7 is connected to the optical signal input end of the unbalanced interferometer 11, and the signal output end of the unbalanced interferometer 11 is connected to the signal input end of the photodetector 12 , the signal output end of the photodetector 12 is connected to the signal input end of the phase detector 13, the signal output end of the phase detector 13 is connected to the signal input end of the A / D conversion device 16, and the piezoelectric ceramic 15 is pasted on the unbalanced interference On one arm of the instrume...

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Abstract

The invention relates to a device for testing railway wagon overloading and unbalance loading by a foundationless-tunnel fiber and a method, relating to the technical field of fiber sensor and overcoming the problems that the existing overloading and unbalance loading detecting technology has low precision and bad anti-electromagnetic interference capability. The device comprises a laser, a coupler, a transmission fiber, fiber Bragg grading strain transducers, a light splitter, a wavelength demodulation device, a data acquisition unit and an analytical processing device; every two fiber Bragggrading strain transducers are symmetrically welded at the bottom parts of upper tracks of a left track and a right track to form a sensor assembly; a first sensor assembly serves as a starting deviceand is arranged at the open end of a detecting area; the coupler is arranged in the middle of the transmission fiber and is connected with the light splitter; ten output channels of the light splitter are respectively connected with ten input ends of the wavelength demodulation device; and the data acquisition unit is connected with the wavelength demodulation device and the analytical processingdevice. The invention is applicable to railway wagon overloading and unbalance loading on-line detection.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a detection device and method for overloading and partial loading of railway wagons. Background technique [0002] Railway transportation is the main artery of the national economy, and transportation safety is the top priority of railway transportation. However, due to the drive of economic interests, for a long time, railway freight vehicles have been seriously overloaded, eccentrically loaded and other unreasonable transportation phenomena. The long-term overload and partial load of the train will seriously damage the railway facilities and shorten the service life of the railway. Moreover, due to the uneven force on the wheels and axles of the train, it will be in a fatigue state for a long time. Accidents such as subversion will happen. [0003] Initially, the detection system for overloading and eccentric loading of railway wagons adopts the foundation pit r...

Claims

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Application Information

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IPC IPC(8): G01G19/06G01B11/16
Inventor 刘盛春张丽莹余有龙
Owner HEILONGJIANG UNIV
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