CN110426453A - A kind of lossless detection method improving III type track plates vacant analysis precision of CRTS - Google Patents
A kind of lossless detection method improving III type track plates vacant analysis precision of CRTS Download PDFInfo
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- CN110426453A CN110426453A CN201910728432.7A CN201910728432A CN110426453A CN 110426453 A CN110426453 A CN 110426453A CN 201910728432 A CN201910728432 A CN 201910728432A CN 110426453 A CN110426453 A CN 110426453A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
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Abstract
The invention discloses a kind of lossless detection methods for improving III type track plates vacant analysis precision of CRTS, comprising the following steps: (a) arranges several measuring points on track plates, is tapped monolith track plates point by point along measuring point；(b) the impact elasticity wave signal for tapping and generating after track plates is received；(c) ordered series of numbers transformation, frequency spectrum parsing are carried out, the reflection signal of the reflection signal and self-compacting concrete bottom surface of track plates bottom surface is extracted；(d) degree of coming to nothing is judged according to track plates bottom reflection average energy value, the ratio size of self-compacting concrete bottom reflection average energy value.The purpose of the present invention is to provide a kind of lossless detection methods for improving III type track plates vacant analysis precision of CRTS, to solve the problems, such as that peak value is unobvious, energy extreme value cannot reflect real reflection position completely and reperformance test result is discrepant after reflected energy is average in detection method in the prior art, realizes the purpose of the reliability for improving testing result and repeatability.
Description
Technical field
The present invention relates to railway engineering quality safety detection fields, and in particular to a kind of III type track plates of raising CRTS come to nothing
The lossless detection method of detection accuracy.
Background technique
With the fast development that China Railway High-speed is built, China possesses the III type track plates of CRTS of independent intellectual property right
It is applied and is practiced on several passenger dedicated railway lines, however there are no in conjunction in engineering field of non destructive testing
Detection technique.
III plate-type of CRTS without how track General structure scheme be shouldered novel unit platy ballastless track structure,
Mainly by rail, fastener, precast track plate, self-compacting concrete, limit block machine, intermediate isolating layer (geotextiles) and reinforced concrete
The part such as native pedestal forms.Due to by structure complication and the factor more demanding on execution conditions influenced, work as pre-track
In the presence of when coming to nothing among plate and self-compacting concrete, traditional detection method is by tapping the impact elasticity generated after track plates
Wave will hit against the judge mark of the reflected energy mean value obtained after track plates and extreme value size as the degree of coming to nothing as medium
It is quasi-.The testing result obtained by this detection method is primarily present following two points drawback:
1. after the reflected energy within the scope of slice depth is averaged, the energy peak of each measuring point can be also averaged, to lead
Cause defect that cannot significantly show；
2. being not necessarily that track plates are anti-at the peak-peak of energy when the reflected energy extreme value selected within the scope of slice depth
The position penetrated, there may be erroneous judgements for testing result；
3. if the result of reperformance test can have a certain difference calculate testing result with reflected energy mean value.
Summary of the invention
The purpose of the present invention is to provide it is a kind of improve III type track plates vacant analysis precision of CRTS lossless detection method,
With solve in detection method in the prior art reflected energy it is average after peak value is unobvious, energy extreme value cannot reflect very completely
Positive reflection position and the discrepant problem of reperformance test result realizes the mesh of the reliability for improving testing result and repeatability
's.
The present invention is achieved through the following technical solutions:
A kind of lossless detection method improving III type track plates vacant analysis precision of CRTS, comprising the following steps:
(a) several measuring points are arranged on track plates, are tapped monolith track plates point by point along measuring point；
(b) the impact elasticity wave signal for tapping and generating after track plates is received；
(c) ordered series of numbers transformation, frequency spectrum parsing are carried out, reflection signal and the self-compacting concrete bottom surface of track plates bottom surface are extracted
Reflect signal；
(d) according to track plates bottom reflection average energy value, the ratio size of self-compacting concrete bottom reflection average energy value
To judge the degree of coming to nothing.
For the average rear peak value of reflected energy in detection method in the prior art, unobvious, energy extreme value cannot be completely anti-
Real reflection position and the discrepant problem of reperformance test result should be gone out, the present invention proposes a kind of III type track of raising CRTS
The lossless detection method of plate vacant analysis precision, compared to the prior art in only to tap the reflected energy obtained after track plates
The mode of mean value and extreme value size as the judgment criteria for the degree of coming to nothing, this method after tapping track plates equally by generating
Impact elasticity wave is as medium, but this method is anti-according to track plates bottom reflection average energy value and self-compacting concrete bottom
The ratio size of average energy value is penetrated to judge the degree of coming to nothing, comparison other is more intuitive, referential is stronger, and comparison result more may be used
It leans on and repeatability is higher.
Preferably, frequency spectrum parsing is parsed using maximum entropy method (MEM) in step (c).
Further, the step (d) includes:
(I) set slice range x1~x2 on track plates, corresponding self-compacting concrete slice range as X1~X2,
Sampling interval is T；
(II) the times of collection Δ t in track plates slice range is calculated1:
Calculate track plates bottom reflection average energy value m:
Wherein miThe energy value in range is sliced in x1~x2 for i-th of acquisition points；N is total measuring point number；
(III) the times of collection Δ t in self-compacting concrete slice range is calculated2:
Calculate self-compacting concrete bottom reflection average energy value M:
Wherein Mi is energy value of i-th of acquisition points in X1~X2 slice range；N is total measuring point number.
As m/M≤1, judge among track plates and self-compacting concrete for dense state；
As m/M > 1, judge among track plates and self-compacting concrete for the state of coming to nothing.
Further, clear state is assigned to tested track plates slice isogram, the situation that will come to nothing is divided into three classes, with not
With color respectively indicate the region exist obviously come to nothing, slightly come to nothing, quality it is good.
Further, by various colors, proportion is counted in whole slice isogram, is obtained and is obviously come to nothing
Index and the doubtful index that comes to nothing.
Compared with prior art, the present invention having the following advantages and benefits:
A kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS of the present invention, compared to the prior art
In only using tap the reflected energy mean value obtained after track plates and extreme value size as the degree of coming to nothing judgment criteria in a manner of,
The impact elasticity wave that this method is equally generated using after through percussion track plates is as medium, but this method is according to track plates bottom
The ratio size of portion's reflected energy mean value and self-compacting concrete bottom reflection average energy value judges the degree of coming to nothing, comparison other
More intuitively, referential is stronger, and comparison result is more reliable and repeatable higher.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the detection schematic diagram of the specific embodiment of the invention；
Fig. 2 is the frequency spectrum analysis diagram of the single measuring point in the specific embodiment of the invention in dense state；
Fig. 3 is the frequency spectrum analysis diagram of the single measuring point in state of coming to nothing in the specific embodiment of the invention；
Fig. 4 is known defect contrast schematic diagram in the specific embodiment of the invention；
Fig. 5 is repeated Comparative result schematic diagram in the specific embodiment of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
A kind of lossless detection method improving III type track plates vacant analysis precision of CRTS, comprising the following steps:
(a) several measuring points are arranged on track plates, are tapped monolith track plates point by point along measuring point；
(b) the impact elasticity wave signal for tapping and generating after track plates is received；
(c) ordered series of numbers transformation, frequency spectrum parsing are carried out, reflection signal and the self-compacting concrete bottom surface of track plates bottom surface are extracted
Reflect signal；
(d) according to track plates bottom reflection average energy value, the ratio size of self-compacting concrete bottom reflection average energy value
To judge the degree of coming to nothing.
Peak value is unobvious after traditional detection method reflected energy is average, and reperformance test result is variant；
The present invention be then tapped point by point by being tested III type track plates of CRTS to monolith, and by resulting signal into
Line number column conversion, then the corresponding slice range of setting, forms slice Contour map, reflects eventually by slice range
The ratio of average energy value determines the situation of coming to nothing of tested III type track plates of CRTS, compared to traditional detection method, the application
III type of CRTS without how track plates come to nothing non-destructive testing technology be a kind of more reliable, repeatable detection a kind of detection method.
Embodiment 2:
Include the following steps.
1, the state (include: size, surface whether dry) of clearly tested III type track plates of CRTS；
2, using signal excitation device excitation signal, make signal in tested III type track plates internal communication of CRTS；
3, the signal after III type track plates internal communication of CRTS is received using signal receiving device；
4, III type track plates of monolith CRTS are tapped point by point along measuring point；
5, the signal received is parsed using dedicated analysis software, obtained all signals is counted respectively
The parameter settings such as rank transformation, frequency spectrum parsing, slice range, slice isogram；
6, frequency spectrum parsing setting is parsed using MEM (maximum entropy method (MEM)), and the sampling interval is calculated using 0.001ms.
7, the ratio of the average energy value reflected by control slice range, to judge coming to nothing for III type track plates of CRTS
Situation.
For the present embodiment by taking the III type track plates of CRTS of 5.6 × 2.5 × 0.2m as an example, total acquisition points are 144 measuring points:
(1) the slice range of precast track plate is by taking 0.18~0.22cm as an example, is sliced all energy obtained in range at it
Amount mean value is m, and the times of collection being sliced in range is Δ t1, and m1 is sliced range in 0.18~0.22cm for first acquisition points
Interior energy value, therefore deduces that:
(2) the slice range of self-compacting concrete is by taking 0.26~0.36cm as an example, is sliced the energy obtained in range at it
Mean value is M, and the times of collection being sliced in range is Δ t2, and M1 is that first acquisition points is sliced in range in 0.26~0.36cm
Energy value, therefore deduce that:
(3) when precast track plate and self-compacting concrete centre are dense state, m/M≤1；
It is m/M > 1 when coming to nothing state among precast track plate and self-compacting concrete.
Clear state is assigned to tested III type track plates of CRTS slice isogram, the situation that will come to nothing is divided into 3 classes, i.e., red
Color table shows that region presence is obviously come to nothing, yellow (green) indicates that region presence is slightly come to nothing, blue indicates the regional quality
Well, it there's almost no and come to nothing.Finally by various colors, proportion is counted in whole slice isogram, is obtained bright
Aobvious come to nothing index and the doubtful index that comes to nothing.
The present embodiment, known defect data are gone out to scheme using two kinds of different analysis methods, it is known that isopleth cloud atlas is most upper
Two, face survey line is to come to nothing completely (left side Fig. 4 boxed area), and analysis result uppermost position, which should be obviously to come to nothing, (should be red
Color).
It is compared respectively with the test method of conventional test methodologies and the application, as shown in Figure 4, Fig. 4 is right for test result
Side is the method for the present embodiment, can preferably analyze the position come to nothing completely, and the traditional analysis on the left side Fig. 4 is then not
Energy.
Fig. 5 is data comparison knot of the scene using the III type track plates of host test same CRTS of two same models
Fruit.Comparing result in Fig. 5 shows that when being sliced using the application patented method, position of coming to nothing is almost the same, there is preferable repetition
Property；And when using traditional analysis, being sliced position of coming to nothing is not fixed, less reproducible.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS, which is characterized in that including following step
It is rapid:
(a) several measuring points are arranged on track plates, are tapped monolith track plates point by point along measuring point；
(b) the impact elasticity wave signal for tapping and generating after track plates is received；
(c) ordered series of numbers transformation, frequency spectrum parsing are carried out, the reflection of the reflection signal and self-compacting concrete bottom surface of track plates bottom surface is extracted
Signal；
(d) sentenced according to track plates bottom reflection average energy value, the ratio size of self-compacting concrete bottom reflection average energy value
Disconnected degree of coming to nothing.
2. a kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS according to claim 1,
It is characterized in that, frequency spectrum parsing is parsed using maximum entropy method (MEM) in step (c).
3. a kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS according to claim 1,
It is characterized in that, the step (d) includes:
(I) the slice range of slice range x1~x2 on track plates, corresponding self-compacting concrete is set as X1~X2, sampling
Between be divided into T；
(II) the times of collection Δ t in track plates slice range is calculated1:
Calculate track plates bottom reflection average energy value m:
Wherein miThe energy value in range is sliced in x1~x2 for i-th of acquisition points；N is total measuring point number；
(III) the times of collection Δ t in self-compacting concrete slice range is calculated2:
Calculate self-compacting concrete bottom reflection average energy value M:
Wherein Mi is energy value of i-th of acquisition points in X1~X2 slice range；N is total measuring point number.
4. a kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS according to claim 3,
It is characterized in that:
As m/M≤1, judge among track plates and self-compacting concrete for dense state；
As m/M > 1, judge among track plates and self-compacting concrete for the state of coming to nothing.
5. a kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS according to claim 1,
It is characterized in that, assigns clear state to tested track plates slice isogram, the situation that will come to nothing is divided into three classes, with different colours point
Do not indicate the region exist obviously come to nothing, slightly come to nothing, quality it is good.
6. a kind of lossless detection method for improving III type track plates vacant analysis precision of CRTS according to claim 5,
Be characterized in that, by various colors, proportion is counted in whole slice isogram, obtain obviously come to nothing index and doubt
Seemingly come to nothing index.
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Cited By (2)
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| CN111077222A (en) * | 2020-03-02 | 2020-04-28 | 四川陆通检测科技有限公司 | Nondestructive testing method for track slab separation |
| CN111487315A (en) * | 2020-04-17 | 2020-08-04 | 四川陆通检测科技有限公司 | Audio frequency nondestructive testing method for tunnel lining thickness and void |
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