CN206926656U - A kind of undulatory wear detection means - Google Patents
A kind of undulatory wear detection means Download PDFInfo
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- CN206926656U CN206926656U CN201720889174.7U CN201720889174U CN206926656U CN 206926656 U CN206926656 U CN 206926656U CN 201720889174 U CN201720889174 U CN 201720889174U CN 206926656 U CN206926656 U CN 206926656U
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- photoelectric displacement
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Abstract
The utility model provides a kind of undulatory wear detection means, and the undulatory wear detection means includes：Encoder, it is arranged on the wheel shaft of train；An at least accelerometer, is arranged on the body frame of train, and the train travel distance for being measured according to the encoder measures acceleration signal；An at least photoelectric displacement meter, is arranged on the body frame, and the train travel distance for being measured according to the encoder measures photoelectric displacement signal；Signal amplifies and filter, connects accelerometer and the photoelectric displacement meter, for the acceleration signal and photoelectric displacement signal is amplified and filtering process；QNX systems, the signal amplification and filter are connected, receives acceleration signal and the photoelectric displacement signal after amplification and filtering process, and export and obtain track irregularity value waveform.Using the utility model, equipment can be simplified, reduce volume and space-consuming.
Description
Technical field
Rail undulatory wear detection technique is the utility model is related to, more particularly to a kind of undulatory wear detection means.
Background technology
Rail undulatory wear is irregularity phenomenon of periodicity of the rail surface along genesis analysis similar to wave-like, rail
The wavelength of undulatory wear is typically between 100mm~3m, from the point of view of field investigation, most of wavelength of ripple mill in 200mm extremely
700mm。
Rail undulatory wear is one of disease of generally existing during rail use, and each state all pays much attention to detection device
Exploitation, ripple mill detection method summed up two kinds：Short string chord measurement and inertial reference method；The acquisition of signal has acceleration
Method, optical method, also have the method using current vortex sensor；The processing of data also divides time-domain, spatial domain, frequency
A variety of different processing methods such as domain.As Australian Pacific Realtime companies use inertia method principle, to axle box plus
Speed is integrated twice, and the RMS value of undulatory wear is exported by three kinds of wavelength periods；Italian MerMec companies are surveyed using short string string
Method principle, displacement is obtained by Laser video camera technology, the RMS value of undulatory wear is exported by three kinds of wavelength periods；Holland utilizes axle box
Vibration acceleration signal is as raw sensor signal, from the angle of wheel-rail interaction, using specific measurement wheel pair,
Substantial amounts of replica test has been made with the different speeds of service, according to energy invariance principle, optimal ginseng is selected with least square method
Number, simulates the transmission function between track irregularity and axle box acceleration, keeps constant in friction speed according to energy
Principle release rate influences, and draws rail surface Short wave irregularity value.Ensco companies of the U.S. are surveyed using the chord measurement of short string offset distance
Rail surface undulatory wear is measured, sensor used is reflective high frequency eddy current displacement sensor, and specific practice is by 4 electric whirlpools
Flow sensor is arranged on rail surface above 10mm position with 50mm equidistant longitudinal arrangement, using its measurement of SERVO CONTROL
On the in-orbit end face center line in position, the 5th point of measured value is extrapolated with 4 points of the vertical displacement measured value, obtains chord length 100mm respectively
Wait string just mistake value, chord length 150mm tapered chord just mistake value and chord length 200mm etc. string just mistake value.
China Railway Science Academe Base Equipment Measurement Research Institute have developed BM-1, BM-2 by researching and developing for many years
Type undulatory wear detection device, the track development level of China's different times is represented, system-wide is pacified altogether so far
Standby undulatory wear ten cars of detection device of assembling.BM-1 type undulatory wears detection device uses the acceleration being arranged on vehicle axle box
Degree meter quadratic integral method obtains displacement, instructs live steel rail grinding.
In train travelling process, rail undulatory wear is to produce noise and cause the main of wheel-rail interaction power change
One of reason, in the especially domestic urban mass transit network quickly grown at present, undulatory wear phenomenon occur it is more universal, sternly
Train operation comfort level is have impact on again.Track division does not detect the specialized equipment of rail corrugation at present, can only be seen by technical staff
Identification is examined, after typical ripple mill waveform comes out, review is measured with straight chi or clearance gauge.Processing mode of the scene to ripple mill
Mainly polish, but due to more serious, it is necessary to be polished for a plurality of times when ripple mill is found, polishing cost is very high, polishes sometimes not
In place, ripple mill is not completely eliminated, in operation afterwards, ripple mill can develop quickly, can only finally switch tracks.Therefore study
Rail undulatory wear dynamic detection system is very important, it is possible to increase detection efficiency, to maintenance department economically
Scientific basis is provided in terms of formulating steel rail grinding plan.
Existing undulatory wear detecting system knot is general mainly to be believed by left and right axle box accelerometer, photoelectric encoder, simulation
The compositions such as number pretreatment unit, signal acquisition computer, interchanger, waveform display editor computer, interchanger, printer.Base
This operation principle is：Use displacement variable of the accelerometer measures wheel installed in axle box opening position with respect to rail；Use
The distance of encoder measurement train walking, system is according to equidistant carry out data acquisition.Analog signal pretreatment system is by signal
Signal acquisition process computer is input to after amplification and analog filtering processing by signal converting and monitoring unit again.The computer
A/D analog-to-digital conversions, collection, storage, digital filtering, amendment and compensation deals are carried out to input analog signal, then by comprehensive
Computing is closed, synthesis obtains required rail undulatory wear irregularity, and the real-time display irregularity oscillogram on its waveform oscilloscope.
Acquisition process computer can also give other application computer by network transmission, will by the acquisition process computer
Orbit geometry parameter and the data that transfinite are stored in database, show track geometry waveform, or display transfinite data and can to surpass
Limit data enter edlin.Finally, transfinite data sheet or the oscillogram of orbit geometry parameter can be printed by the network printer.
Existing undulatory wear detecting system typically obtains shift value, sensor peace using accelerometer quadratic integral principle
On axle box, axle box is directly connected with car wheel-set, and the vibration of track irregularity is by taking turns to being directly delivered on axle box, institute
Vibrated with axle box in train operation extremely violent, no buffering, sensor easily damages.And existing undulatory wear detection system
Unite complicated, be mainly manifested in：
1. sensor mounting location is at train axle box, vibration frequency is high, and sensor is fragile, is unfavorable for continuing detection.
2. fainter only with accelerometer measures low speed brief acceleration meter signal, signal to noise ratio is low, and to integrate
Computing, low frequency signal easily cause saturation.
3. the computing of generated data result is carried out in windows operating systems, computing needs to wait for system distribution kernel resources,
Data can not handle display in real time, and loss of data is caused in train high-speed cruising.
4. accelerometer precision is low, measurement accuracy is larger, can not the less irregularity value of effective detection amplitude.
5. equipment is more on system car, three industrial computers and printer, equipment volume is big, and space-consuming is big.
Utility model content
The utility model embodiment provides a kind of undulatory wear detection means and method, to simplify equipment, reduces volume
And space-consuming.
In order to solve the above problems, the utility model embodiment provides a kind of undulatory wear detection means, including：
Encoder, it is arranged on the wheel shaft of train；
An at least accelerometer, is arranged on the body frame of train, for the train row measured according to the encoder
Walk range measurement acceleration signal；
An at least photoelectric displacement meter, is arranged on the body frame, for the train row measured according to the encoder
Walk range measurement photoelectric displacement signal；
Signal amplifies and filter, accelerometer and the photoelectric displacement meter is connected, for the acceleration signal
And photoelectric displacement signal is amplified and filtering process；
QNX systems, the signal amplification and filter are connected, receive the acceleration letter after amplification and filtering process
Number and photoelectric displacement signal, and export obtain track irregularity value waveform.
In one embodiment, the number of the accelerometer is 2, is respectively arranged at the left and right sides of the body frame, position
Above wheel shaft.
In one embodiment, the number of the photoelectric displacement meter is 2, is respectively arranged at the left and right sides of the body frame,
Above wheel shaft.
In one embodiment, it is provided with the QNX systems：
AD capture cards, for gathering the pretreated acceleration signal and light from signal amplification and filter
Current potential shifting signal；
Memory module, for storage track irregularity value and the judged result that transfinites；
Display module, for showing the track irregularity value and the judged result that transfinites.
In one embodiment, reflector is provided with the axle box of the wheel shaft, for reflection laser.
Using the utility model, equipment can be simplified, reduce volume and space-consuming.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic view of the mounting position of accelerometer, photoelectric displacement meter and encoder in the embodiment of the utility model one；
Fig. 2 is that QNX system datas of the present utility model handle schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
The utility model embodiment provides a kind of undulatory wear detection means, and the undulatory wear detection means includes：Coding
Device, at least an accelerometer, at least a photoelectric displacement meter, signal amplification and filter and QNX systems.
Encoder is arranged on the wheel shaft of train wheel.
Accelerometer is arranged on the body frame of train, and the train travel distance for being measured according to the encoder is surveyed
Measure the acceleration signal moving displacement amount of ground (bogie relative to).
Photoelectric displacement meter is arranged on body frame, and the train travel distance for being measured according to the encoder measures light
The current potential shifting signal moving displacement amount of axle box (bogie relative to).
Signal amplifies and filter, accelerometer and the photoelectric displacement meter is connected, for the acceleration signal
And photoelectric displacement signal is amplified and filtering process；
QNX systems, the signal amplification and filter are connected, receive the acceleration letter after amplification and filtering process
Number and photoelectric displacement signal, and export obtain track irregularity value waveform.QNX systems are believed according to acceleration signal and photoelectric displacement
Number, track irregularity value waveform is obtained, can be achieved, repeat no more by known technology.
In addition, being based on track irregularity value waveform, line overrun judgement can also be entered, the track irregularity value can also be exported
Corresponding irregularity type, ripple mill value and corresponding location of rail information.The part can also be realized by known technology, no longer superfluous
State.
The utility model carries out data processing using real time operating system (QNX systems), solves a large amount of cache miss of data
Problem.In addition, testing number factually when be stored in processing computer in, simplify equipment, reduce volume and space-consuming.
Fig. 1 is the schematic view of the mounting position of encoder, accelerometer and photoelectric displacement meter in the embodiment of the utility model one,
As shown in figure 1, encoder 101 is arranged on the wheel shaft of train wheel 104, displacement is converted into periodic electric signal, then
This electric signal is transformed into count pulse, and the size of displacement is represented with the number of pulse, and accelerometer is gathered by fixed distance
And the data at photoelectric displacement meter current time.
In the present embodiment, the number of accelerometer 102 is 2, the left and right sides of body frame is respectively arranged at, positioned at wheel shaft
Top, the utility model are not limited.In train travelling process, the vibration at body frame can pass through first-level buffer significantly
Slow down, the utility model by accelerometer design and installation on body frame, can be while acceleration signal value be measured
Sensor is avoided to be damaged because of long-term high vibration.
In the present embodiment, the number of photoelectric displacement meter 103 is 2, the left and right sides of body frame is respectively arranged at, positioned at wheel
Above axle, the utility model is not limited.Due to more micro- only with accelerometer measures acceleration signal, acceleration signal
It is weak, signal to noise ratio so that low frequency signal easily causes the problem of saturation.
Fig. 2 is that QNX system datas of the present utility model handle schematic diagram, as shown in Fig. 2 being provided with QNX systems：
Timer conter, encoder is connected to, for count pulse, according to solid in terms of controlling accelerometer and photoelectric displacement
It is fixed apart from gathered data.
AD capture cards, for gathering the pretreated acceleration signal and light from signal amplification and filter
Current potential shifting signal；
Memory module, for storage track irregularity value and the judged result that transfinites；
Display module, for showing the track irregularity value and the judged result that transfinites.
In one embodiment, reflector is provided with the axle box of the wheel shaft, the laser for reflection laser displacement meter.
Using the utility model, data processing can be carried out in real time, solve the problems, such as a large amount of data cached loss.This reality
It can simplify equipment with new undulatory wear detection means, reduce volume and space-consuming.
Based on conceiving with above-mentioned undulatory wear detection means identical utility model, the utility model embodiment provides ripple
Unrestrained Abrasion detecting method, because the undulatory wear detection method is to be based on undulatory wear detection means, therefore the undulatory wear is examined
The implementation of survey method may refer to the implementation of undulatory wear detection means, repeats part and repeats no more.
The utility model effectively eliminates damage caused by sensor Long-term Vibration, and using high precision photoelectric displacement meter and
Accelerometer measures, measurement accuracy is improved to 0.05mm, can detect the Rail irregularity of amplitude very little on high ferro circuit；Separately
Outside, equipment on vehicle quantity is reduced, reduces space use.
Specific embodiment is applied in the utility model to be set forth principle of the present utility model and embodiment, with
The explanation of upper embodiment is only intended to help and understands method and its core concept of the present utility model；Meanwhile for this area
Those skilled in the art, according to thought of the present utility model, there will be changes, comprehensive in specific embodiments and applications
Upper described, this specification content should not be construed as to limitation of the present utility model.
Claims (5)
- A kind of 1. undulatory wear detection means, it is characterised in that including：Encoder, it is arranged on the wheel shaft of train；An at least accelerometer, is arranged on the body frame of train, for measured according to the encoder train walking away from From measurement acceleration signal；An at least photoelectric displacement meter, is arranged on the body frame, for measured according to the encoder train walking away from From measurement photoelectric displacement signal；Signal amplifies and filter, accelerometer and the photoelectric displacement meter is connected, for the acceleration signal and light Current potential shifting signal is amplified and filtering process；QNX systems, connect signal amplification and filter, receive the acceleration signal after amplification and filtering process and Photoelectric displacement signal, and export and obtain track irregularity value waveform.
- 2. undulatory wear detection means according to claim 1, it is characterised in that the number of the accelerometer is 2, point The left and right sides of the body frame is not arranged at, above wheel shaft.
- 3. undulatory wear detection means according to claim 1, it is characterised in that the number of the photoelectric displacement meter is 2, The left and right sides of the body frame is respectively arranged at, above wheel shaft.
- 4. undulatory wear detection means according to claim 1, it is characterised in that be provided with the QNX systems：AD capture cards, for gathering the pretreated acceleration signal and photopotential from signal amplification and filter Shifting signal；Memory module, for storage track irregularity value and the judged result that transfinites；Display module, for showing the track irregularity value and the judged result that transfinites.
- 5. undulatory wear detection means according to claim 1, it is characterised in that be provided with the axle box of the wheel shaft anti- Tabula rasa, for reflection laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720889174.7U CN206926656U (en) | 2017-07-20 | 2017-07-20 | A kind of undulatory wear detection means |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720889174.7U CN206926656U (en) | 2017-07-20 | 2017-07-20 | A kind of undulatory wear detection means |
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| CN206926656U true CN206926656U (en) | 2018-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983984A (en) * | 2021-10-28 | 2022-01-28 | 中国铁道科学研究院集团有限公司基础设施检测研究所 | Method and device for measuring motion attitude of framework where track detection system is located |
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2017
- 2017-07-20 CN CN201720889174.7U patent/CN206926656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983984A (en) * | 2021-10-28 | 2022-01-28 | 中国铁道科学研究院集团有限公司基础设施检测研究所 | Method and device for measuring motion attitude of framework where track detection system is located |
| CN113983984B (en) * | 2021-10-28 | 2024-04-16 | 中国铁道科学研究院集团有限公司基础设施检测研究所 | Method and device for measuring motion gesture of framework where track detection system is located |
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