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High speed railway steel rail flaw detection experiment platform and detection method

An experimental platform and detection method technology, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, etc., can solve the problem of inability to track real-time monitoring, and the detection results of hand-push flaw detectors are easily affected by environmental and personal subjective factors, misjudgment and problems such as missed judgments, to achieve the effect of simplifying the use of equipment, improving integration, and improving automation

Active Publication Date: 2014-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the detection results of the hand-push flaw detector are easily affected by the environment and personal subjective factors, and it is easy to cause misjudgments and missed judgments, while the high-speed rail inspection vehicle cannot monitor the track in real time. A kind of high-speed rail rail damage detection experimental platform and detection method

Method used

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  • High speed railway steel rail flaw detection experiment platform and detection method
  • High speed railway steel rail flaw detection experiment platform and detection method
  • High speed railway steel rail flaw detection experiment platform and detection method

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Experimental program
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specific Embodiment approach 1

[0032] Specific implementation mode one: the following combination Figure 1 to Figure 7 Describe this embodiment, the high-speed rail rail damage detection experimental platform described in this embodiment includes a pressurizing device 1, a screw mandrel 2, a simulated wheel 3, a simulated high-speed rail 4, a conveyor belt 5, a driving wheel 6, a motor 8, and a vibration acceleration sensor 9, wifi wireless transmitting module 12, wifi wireless receiving module 13 and upper computer 14,

[0033] The simulated high-speed rail 4 is a disc-shaped wheel structure. The transmission connection between the simulated high-speed rail 4 and the driving wheel 6 is realized through the conveyor belt 5. The driving wheel 6 is rotated by the motor 8. The rolling contact between the simulated wheel 3 and the simulated high-speed rail 4 ,

[0034] The pressurizing device 1 pressurizes the simulated wheel 3 through the screw rod 2;

[0035] A vibration acceleration sensor 9 is arranged o...

specific Embodiment approach 2

[0039] Embodiment 2: This embodiment further describes Embodiment 1. It also includes a frequency converter 7 . The output terminal of the frequency converter 7 is connected to the input terminal of the speed control signal of the motor 8 . The frequency converter is used to control the magnitude of the rotational speed of the motor 8 .

[0040] A belt pulley is arranged on the driving wheel 6 and the simulated high-speed rail 4, and the two belt pulleys are connected by the conveyor belt 5. The driving wheel 6 is driven by the motor 8 to rotate, and the driving wheel 6 drives the simulated high-speed rail 4 to rotate by the conveyor belt 5.

[0041] Damage signals at different simulated vehicle speeds can be obtained by controlling the rotational speed of the motor 8 .

[0042] simulated speed Its derivation process is:

[0043] let n 1 is the speed of motor 8, n 2 is the rotational speed of the simulated rail 4, d 1 is the pulley diameter on the drive pulley 6, d 2 is...

specific Embodiment approach 3

[0045] Specific embodiment three: this embodiment will further explain embodiment one, and it also includes pressure sensor 10, and pressure sensor 10 is used for detecting the pressure signal that pressurizing device 1 applies to simulated wheel 3, and the pressure signal output terminal of pressure sensor 10 is connected with The pressure signal input end of the wifi wireless transmitting module 12 is connected.

[0046] The simulated vehicle weight, that is, the pressure value can be measured by the pressure sensor 10 on the device. The pressure sensor 10 adopts the SH-20K digital display pressure gauge of Santo Company. By applying different pressure values, different simulated vehicle weights can be obtained. below the damage signal.

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Abstract

The invention relates to a high speed railway steel rail flaw detection experiment platform and a detection method. The invention belongs to the technical field of railway safety monitoring and protection. With a hand-push flaw detector, detection result is susceptible to the influences of environmental and personal factors. The invention aims at solving the problem. The platform comprises a pressurizing device, a screw, a simulated wheel, a simulated high speed railway steel rail, a conveyor belt, a driving wheel, a motor, vibration acceleration sensors, a wifi wireless transmitter module, a wifi wireless receiver module, and a host computer. The detection method comprises the steps that: 1, different vehicle weights and speeds are simulated, such that different surface flaws are caused; time-domain and time-frequency-domain characteristic parameters of signals collected by the vibration acceleration sensors are obtained; and a flaw identification database is established through a support vector machine; 2, a plurality of vibration acceleration sensors are arranged along a circumferential direction of the simulated high speed railway steel railway, and parameters of the signals collected by the vibration acceleration sensors are obtained; and 3, with the reference of the flaw identification database, whether surface flaw exists at the place of each of the vibration acceleration sensors in the step 2 is determined.

Description

technical field [0001] The invention relates to a high-speed rail rail damage detection experimental platform and a detection method, belonging to the technical field of railway safety monitoring and protection. Background technique [0002] Due to the long-term interaction between the train and the rail, the natural environment and the quality of the rail itself will cause damage to the rail. According to the type of rail damage, damage location and damage cause in China, there are 9 categories and 32 kinds of damage. At present, there are two main types of track damage detection: hand-push flaw detector and large-scale track inspection vehicle. The former is the main means of domestic track inspection. The main problem of this method is low efficiency. 4 people, the detection speed is only 2-3km / h. Secondly, in flaw detection, the detection results are easily affected by the environment and personal subjective factors, and it is easy to cause misjudgments and missed judg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04
Inventor 王艳魏强章欣沈毅
Owner HARBIN INST OF TECH
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