CN103472134A - Method for detecting steel rail fracture point by using sound - Google Patents
Method for detecting steel rail fracture point by using sound Download PDFInfo
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- CN103472134A CN103472134A CN2013103346933A CN201310334693A CN103472134A CN 103472134 A CN103472134 A CN 103472134A CN 2013103346933 A CN2013103346933 A CN 2013103346933A CN 201310334693 A CN201310334693 A CN 201310334693A CN 103472134 A CN103472134 A CN 103472134A
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Abstract
The invention relates to a method for detecting a steel rail fracture point by using sound. A sound produced by knocking spreads in the steel rail and is reflected back when encountering a fracture surface of fractured steel rail, and then is transmitted to a sound pick-up at the knocking point. A distance between the fracture point and the knocking point is calculated by measuring time difference between the steel rail-knocked sound and the echo. Noise is eliminated by acquiring the noise in time and comparing the acquired noise.
Description
Technical field
The present invention is echo rail fault point locating method, and technical field is automatically to control.
Background technology
Under the complex environments such as mountain area, disconnected rail accident happens occasionally, and if do not found fast disconnected rail position and processing, may lead to the car accident of covering, and harm is serious.After disconnected rail accident occurs railway section, the various trains on railway are forbidden operation, but require the staff to search as early as possible and the eliminating accident, the loss caused to reduce accident.So we study the method for the quick location break point of a kind of energy position.
The current domestic mode by UT (Ultrasonic Testing) is more, but speed of detection is slow.
Summary of the invention
The present invention is by the shock of tup and rail, makes sound import rail inside into, at the rail internal communication, after sound runs into the rupture surface of broken rails, the reflection and return, then import in the acoustic pickup at beating point place.We knock the mistiming of rail sound and echo by measurement, calculate the distance between breakaway poing and beating point.
For the elimination of noise, we use the method for Real-time Collection noise.Adopt the acoustic pickup of two same model, wherein the acoustic pickup of measuring-signal is pressed close to rail, can gather the superposed signal of knocking and noise, measures the acoustic pickup of noise away from rail surface, can record noise signal.Carry out noise reduction with the latter on the former basis, just obtained desirable signal, for calculating.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of Method And Principle.
Embodiment
The generation of sound, by the tup freely falling body of 1kg, is pounded on rail, and bump rail makes the rail vibrations, thereby sound imports rail into.
The collection of sound is used SP-101 type high sensitivity acoustic pickup to convert voice signal to electric signal.12V lithium battery customized for power acquisition.The acoustic pickup of same model is used in the collection of noise.
Voice signal is directly inputted computer with microphone cord, and the noise signal of collection adopts the AD translation function of single-chip microcomputer to import single-chip microcomputer into by the P1.0 mouth of single-chip microcomputer 12C5410AD, and single-chip microcomputer, by serial ports, after the max232 switching signal, is inputted computer.Computer adopts the notebook computer of the 6570b of Hewlett-Packard model.
After two kinds of signals enter computer, the upper computer software of writing with VB, take the noise that gathers as noise carries out noise reduction to voice signal, then calculates distance.Computing method are with reference to the noise-reduction method in GOLDWAVE.
The arrangement of acoustic pickup adopts up and down and places, and the voice signal acoustic pickup is pressed close to rail, and the acoustic pickup of collecting noise is placed on voice signal acoustic pickup top, away from rail.
Claims (1)
1. this sound-detection rail fracture point methods is characterised in that:
Knock rail with weight and propagate sound, the method for the remote reflection of sound in unique detection rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103346933A CN103472134A (en) | 2013-08-05 | 2013-08-05 | Method for detecting steel rail fracture point by using sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103346933A CN103472134A (en) | 2013-08-05 | 2013-08-05 | Method for detecting steel rail fracture point by using sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103472134A true CN103472134A (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103346933A Pending CN103472134A (en) | 2013-08-05 | 2013-08-05 | Method for detecting steel rail fracture point by using sound |
Country Status (1)
| Country | Link |
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| CN (1) | CN103472134A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740983A (en) * | 2017-01-05 | 2017-05-31 | 哈尔滨铁路局科学技术研究所 | A kind of track is broken monitoring method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813666A (en) * | 2010-04-16 | 2010-08-25 | 成都成运科技有限责任公司 | Transient vibration detection method for ballastless track soundness |
| CN102175768A (en) * | 2011-02-22 | 2011-09-07 | 哈尔滨工业大学 | Method and device for detecting defects and failures of high-speed rail based on vibration signals |
| CN102416970A (en) * | 2011-10-12 | 2012-04-18 | 北京安通伟业铁路工务技术有限公司 | On-line steel rail fracture monitoring system and knock detection method |
| CN103217475A (en) * | 2013-03-18 | 2013-07-24 | 北京交通大学 | Detection device for continuously welded rails |
-
2013
- 2013-08-05 CN CN2013103346933A patent/CN103472134A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813666A (en) * | 2010-04-16 | 2010-08-25 | 成都成运科技有限责任公司 | Transient vibration detection method for ballastless track soundness |
| CN102175768A (en) * | 2011-02-22 | 2011-09-07 | 哈尔滨工业大学 | Method and device for detecting defects and failures of high-speed rail based on vibration signals |
| CN102416970A (en) * | 2011-10-12 | 2012-04-18 | 北京安通伟业铁路工务技术有限公司 | On-line steel rail fracture monitoring system and knock detection method |
| CN103217475A (en) * | 2013-03-18 | 2013-07-24 | 北京交通大学 | Detection device for continuously welded rails |
Non-Patent Citations (1)
| Title |
|---|
| 张友鹏等: "基于超声导波的实时钢轨断裂检测方法研究", 《铁道工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740983A (en) * | 2017-01-05 | 2017-05-31 | 哈尔滨铁路局科学技术研究所 | A kind of track is broken monitoring method and device |
| CN106740983B (en) * | 2017-01-05 | 2019-02-19 | 哈尔滨铁路局科学技术研究所 | A kind of track fracture monitoring method and device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |