CN109490413A - A method of reducing bar detection noise - Google Patents
A method of reducing bar detection noise Download PDFInfo
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- CN109490413A CN109490413A CN201811354979.7A CN201811354979A CN109490413A CN 109490413 A CN109490413 A CN 109490413A CN 201811354979 A CN201811354979 A CN 201811354979A CN 109490413 A CN109490413 A CN 109490413A
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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
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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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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention belongs to flaw detection of metal bar technical fields, more particularly to a kind of method for reducing bar detection noise, when detecting, using TCG curve method, preset yield value is arranged to different detection depth, mentions each of control sample industrial injury to 80% height；The gain at each sound path is compensated using preset yield value, so that detection sensitivity remains at low levels in entire scope.By means of the present invention, efficiently solve the problems, such as that near surface clutter is high when titanium alloy rod bar detection, by production and use TCG curve, give gain compensation different at each sound path, the echo amplitude for reaching the identical reflector at different sound paths is identical, reduces clutter, improves signal-to-noise ratio, detection efficiency is greatly improved, the testing requirements of titanium alloy rod bar high sensitivity are met.
Description
Technical field
The invention belongs to flaw detection of metal bar technical fields, and in particular to a method of reduce bar detection noise.
Background technique
When certain h type engine h titanium alloy rod bar is detected a flaw using ultrasonic wave water-immersion method, it is excessively high detection noise often occur, signal-to-noise ratio
The phenomenon of difference, interferes the identification and evaluation of defect waves, seriously affects detection efficiency, or even can not detect a flaw.It is high for above-mentioned clutter
The problem of, a kind of detection method is needed to reduce noise when titanium alloy rod bar detection.
Summary of the invention
To solve problems of the prior art, the purpose of the present invention is to provide a kind of reduction bar detection noises
Method, this method can reduce sensitivity at small sound path, reduce noise when titanium alloy rod bar detection.
The purpose of the present invention is achieved through the following technical solutions:
A method of bar detection noise is reduced, in the detection of bar high sensitivity, is adjusted and is detected using TCG curve method
The sensitivity of bar；The process of the sensitivity of detection bar is adjusted using TCG curve method are as follows: to different in bar control sample
It detects depth and optimal yield value is set, optimal yield value is to keep each of bar control sample industrial injury reflection signal equal
Yield value when raising to 80% height of instrument display screen, records everyone industrial injury reflected signal returns peak value, obtains corresponding
TCG curve；
According to obtained TCG curve acquisition optimum gain value, and with the optimum gain value obtained to the gain at each sound path
It compensates.
Sample is detected using the LS-500 raw material ultrasonic wave water logging defectoscope with TCG curve function.
In detection process, TCG function is opened, the C that the A under the static state of sample zero defect position is swept under image and dynamic is recorded and sweeps
Image.
When size of sample is Φ 25mm or less, probe the model T11001 or T11002 of use.
When size of sample is Φ 25mm- Φ 30mm, probe model T11011, T11012 of use, T11013,
T11014, T11015, T11016 or T11017.
When size of sample is Φ 30mm- Φ 40mm, probe model T11018, T11019 of use, T11020,
T11021, T11022, T11023 or T11024.
When size of sample is Φ 40mm- Φ 50mm, probe the model T11003 or T11004 of use.
When size of sample is Φ 50mm- Φ 75mm, probe the model T11005 or T11006 of use.
When size of sample is Φ 75mm- Φ 90mm, probe the model T11007 or T11008 of use.
When size of sample is Φ 90mm- Φ 100mm, probe the model T11009 or T11010 of use.
The sample is titanium alloy rod bar.
Compared with prior art, the invention has the following beneficial effects:
The method of reduction bar detection noise of the invention is by introducing TCG during titanium alloy rod bar ultrasound detection
Curve method adjusts the sensitivity of detection bar using TCG curve method in the detection of bar high sensitivity；Using TCG curve method tune
It is deep to detection different in bar control sample by adjusting probe incident angle and horizontal position when saving the sensitivity of bar
Optimal yield value is arranged in degree, to guarantee that each of bar control sample industrial injury reflection signal is improved to instrument display screen
80% height, everyone industrial injury reflected signal returns peak value is recorded, so that corresponding TCG curve is obtained, according to ultrasonic field
Echoing characteristics can compensate the gain at each sound path using optimal yield value, spirit actually detected so when detecting
Sensitivity is generally the yield value of minimum detection depth, and since detection depth is smaller, the detection yield value needed is lower, so that
When the full depth detection of bar, sensitivity remains at low levels in entire scope, and sensitivity is lower, then it is actually detected in
For noise with regard to smaller, detection effect is better, can greatly reduce detection noise in this way, to improve detection quality.The present invention
TCG curve is added in the detection process, reduces detection sensitivity at small sound path for theory, can reduce noise.
Detailed description of the invention
Fig. 1 is that the TC4 bar of Φ 100mm does not use the A of TCG curve method to sweep result figure；
Fig. 2 adopts the A being obtained by the present invention for the TC4 bar of Φ 100mm and sweeps result figure；
Fig. 3 is that the TC4 bar of Φ 70mm does not use the A of TCG curve method to sweep result figure；
Fig. 4 adopts the A being obtained by the present invention for the TC4 bar of Φ 70mm and sweeps result figure；
Fig. 5 is that the TC4 bar of Φ 50mm does not use the A of TCG curve method to sweep result figure；
Fig. 6 adopts the A being obtained by the present invention for the TC4 bar of Φ 50mm and sweeps result figure；
Fig. 7 is that the TC4 bar of Φ 100mm does not use the C of TCG curve method to sweep result figure；
Fig. 8 adopts the C being obtained by the present invention for the TC4 bar of Φ 100mm and sweeps result figure.
Specific embodiment
It is next with reference to the accompanying drawings and examples that the present invention is further illustrated.
The method of reduction bar detection noise of the invention is detected a flaw with implementing highly sensitive water logging to titanium alloy rod bar, is
The feasibility of research approach now chooses the titanium alloy rod bar of different materials different-diameter, and conduct a research test, concrete scheme is such as
Under:
(1) subjects: the titanium that the TC4 and TC11 bar of current strong noise is chosen as test object, this test is chosen
The material of alloy bar material and diameter are as shown in table 1.
Table 1
(2) according to the specification of bar, in conjunction with the practical signal-to-noise ratio of TCG curve, it is determined that optimal detection probe and be applicable in
Range chooses the case where specifically popping one's head in model such as 2 institute of table according to raw material metal bar to guarantee detection sensitivity and resolving power
Show:
Table 2
(3) detection device
The LS-500 raw material ultrasonic wave water logging defectoscope with TCG curve function is selected, it is bent to TCG is configured in the system
Line function, TCG curve refer to time-gain curve, its reflection width to reflector at different distances namely on a timeline
Degree can carry out different gain compensation debugging functions reach identical reflector at different sound paths echo amplitude it is identical.Usually may be used
With the probe of certain specification, one group of test block is detected, defined flat-bottom hole echo height is made into distance-amplitude song when by different sound paths
M- gain compensation amendment, uses when detecting a flaw for scene when line or progress.
(3) test method:
Bar test block is placed in detection device sink by root and is detected, the reference block with material same specification is made
TCG curve records the C that the A under the static state of zero defect position is swept under image and dynamic and sweeps figure in the case where TCG function is opened
Picture repeats the above steps and records result.
(4) test result:
Since TC4 bar is identical as TC11 bar inspection result difference very little and trend, the inspection of TC4 bar is only enumerated herein
Survey result.It is as shown in Figures 1 to 6 that each size TC4 bar A sweeps result, wherein Y-axis represents wave height, unit % in figure；X-axis generation
Table depth, unit mm:
Fig. 1, Fig. 3 and Fig. 5 are shown, when TCG curve is not used, the TC4 bar of Φ 100mm, Φ 70mm and Φ 50mm are average
Noise waves height is respectively 90%, 80% and 80%, it can be seen that for the bar of different-diameter, when TCG curve is not used,
Diameter is bigger, and the high situation of clutter is more serious at small sound path, therefore diameter of rod is bigger, gets over the full sound path detection method of sensitivity
It is logical to be difficult to row.
And shown in Fig. 2, Fig. 4 and Fig. 6, after having used TCG curve, the TC4 bar of Φ 100mm, Φ 70mm and Φ 50mm
Average noise wave height is down to 40%, can significantly see, after TCG curve, detection noise has apparent reduction, and
Diameter of rod is bigger, and influence of the TCG curve to noise is bigger.Therefore, TCG curve has significantly to noise in bar detection is reduced
Effect.
Such as Fig. 7 and Fig. 8, X-axis, Y-axis represent bar circumferential coordinates in figure；The Φ 100mm circle shown in comparison diagram 7 and Fig. 8
The C of TC4 bar sweeps image and can be seen that using before and after TCG, and clutter situation has significant change, using noise before TCG about 90%,
Using rear noise less than 40%, signal-to-noise ratio raising reaches 6dB or more, illustrates that TCG curve is imitated in terms of reducing bar detection noise
Fruit is significant.
In conclusion by means of the present invention, near surface clutter is high when efficiently solving titanium alloy rod bar detection asks
Topic gives gain compensation different at each sound path, reaches the identical reflection at different sound paths by production with using TCG curve
The echo amplitude of body is identical, reduces clutter, improves signal-to-noise ratio, greatly improves detection efficiency, meet titanium alloy rod bar Gao Ling
The testing requirements of sensitivity.
Claims (10)
1. a kind of method for reducing bar detection noise, it is characterised in that:
In the detection of bar high sensitivity, the sensitivity of detection bar is adjusted using TCG curve method；It is adjusted using TCG curve method
Detect the process of the sensitivity of bar are as follows: optimal yield value is arranged to detection depth different in bar control sample, most preferably
Yield value be when improving each of bar control sample industrial injury reflection signal to 80% height of instrument display screen
Yield value records everyone industrial injury reflected signal returns peak value, obtains corresponding TCG curve；
The gain at each sound path is carried out according to obtained TCG curve acquisition optimum gain value, and with the optimum gain value obtained
Compensation.
2. a kind of method for reducing bar detection noise according to claim 1, which is characterized in that using bent with TCG
The LS-500 raw material ultrasonic wave water logging defectoscope of line function detects sample.
3. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that in detection process, open
TCG function is opened, the C that the A under the static state of sample zero defect position is swept under image and dynamic is recorded and sweeps image.
4. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is Φ
When 25mm or less, probe the model T11001 or T11002 of use.
5. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is Φ
When 25mm- Φ 30mm, probe model T11011, T11012, T11013, T11014, T11015, T11016 of use or
T11017。
6. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is Φ
When 30mm- Φ 40mm, probe model T11018, T11019, T11020, T11021, T11022, T11023 of use or
T11024。
7. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is Φ
When 40mm- Φ 50mm, probe the model T11003 or T11004 of use.
8. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is Φ
When 50mm- Φ 75mm, probe the model T11005 or T11006 of use.
9. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is Φ
When 75mm- Φ 90mm, probe the model T11007 or T11008 of use.
10. a kind of method for reducing bar detection noise according to claim 2, which is characterized in that when size of sample is
When Φ 90mm- Φ 100mm, probe the model T11009 or T11010 of use.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398426A (en) * | 2019-08-31 | 2020-07-10 | 广东汕头超声电子股份有限公司 | Measurement and compensation calibration method for full-focusing phased array three-dimensional ultrasonic field |
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| US5471879A (en) * | 1992-09-14 | 1995-12-05 | Compagnie Europeene Du Zirconium Cezus | Ultrasonic process for testing, by immersion, a metal piece and use thereof |
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| WO2017089695A1 (en) * | 2015-11-23 | 2017-06-01 | Airbus Group Sas | Device and method for the automatic calculation of a tcg curve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398426A (en) * | 2019-08-31 | 2020-07-10 | 广东汕头超声电子股份有限公司 | Measurement and compensation calibration method for full-focusing phased array three-dimensional ultrasonic field |
| CN111398426B (en) * | 2019-08-31 | 2022-12-06 | 广东汕头超声电子股份有限公司 | Measurement and compensation calibration method for full-focusing phased array three-dimensional ultrasonic field |
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Application publication date: 20190319 |