CN106289124B - A kind of method for following echo in real time of ultrasonic thickness measurement gate - Google Patents
A kind of method for following echo in real time of ultrasonic thickness measurement gate Download PDFInfo
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- CN106289124B CN106289124B CN201610644896.6A CN201610644896A CN106289124B CN 106289124 B CN106289124 B CN 106289124B CN 201610644896 A CN201610644896 A CN 201610644896A CN 106289124 B CN106289124 B CN 106289124B
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- gate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
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- General Physics & Mathematics (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention discloses a kind of method for following echo in real time of ultrasonic thickness measurement gate, include the following steps: that tracking gate determines boundary wave trace interval, the sound path of real-time measurement trace interval inner boundary wave, the gate starting point and gate widths that gate is tracked during entire thickness measuring keep initial setting up constant；Thickness measuring gate adjusts gate starting point according to the boundary wave sound path that tracking gate returns in real time and provides the sound path of echo in gate, realizes that thickness measuring gate follows echo.The caused thickness of steel pipe measurement of echo swing is inaccurate during the present invention solves the problems, such as thickness measuring, eliminate the adverse effect that workpiece motion s generate thickness measuring, improve the trace performance of the thickness measuring gate of ultrasonic thickness measurement method, the accurate measurement to the steel pipe thickness in motion process is realized, ensure that the reliability of ultrasonic measurement thickness of steel pipe.
Description
Technical field
The present invention relates to technical field of nondestructive testing more particularly to a kind of sides for following echo in real time of ultrasonic thickness measurement gate
Method.
Background technique
Currently, non-destructive testing technology has obtained answering extensively in fields such as the metallurgy in China, chemical industry, national defence, communications and transportation
With.In Ultrasonic Nondestructive, improved with the frequency of ultrasonic wave, the wavelength of ultrasonic wave shortens, and the precision of ultrasonic thickness measurement mentions
It is high.Ultrasonic wave dynamic thickness measuring is higher to signal processing requirement: the thickness measuring under one side motion state, between workpiece and ultrasonic probe
Gap dynamic change, echo-signal occur position be swing；On the other hand, path difference when wall thickness is relatively thin, between echo
The width of very little, thickness measuring gate cannot increase.This requires the thickness measuring gates of detection echo position to follow echo to believe in real time
Number, but current status is to detect the thickness measuring gate of echo position to follow echo-signal in real time, and lead to system cannot be into
Row is normal, correctly detects.
Summary of the invention
It is an object of the invention to a kind of methods for following echo in real time by ultrasonic thickness measurement gate, to solve above carry on the back
The problem of scape technology segment is mentioned.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of method for following echo in real time of ultrasonic thickness measurement gate comprising following steps:
S101, tracking gate determine boundary wave trace interval, the sound path of real-time measurement trace interval inner boundary wave, entire
The gate starting point and gate widths that gate is tracked during thickness measuring keep initial setting up constant；
S102, thickness measuring gate adjust gate starting point according to the boundary wave sound path that tracking gate returns in real time and provide in gate
The sound path of echo realizes that thickness measuring gate follows echo.
Particularly, the step S101 includes: the gate starting point L for tracking gates0With gate widths Lw0In entire thickness measuring mistake
It is kept constant in journey, initial setting up will manually be set according to the state of current ultrasonic echo, gate starting point Ls0Positioned at first
In front of a echo-signal, gate widths Lw0Greater than the fluctuation range of echo-signal, the echo-ranging L in gate is tracked0Using return
Wavefront method determines；The starting point L of i-th of thickness measuring gatesi=L0+ΔLi, wherein Δ LiAccording to thickness measuring gate when being initial setting up
The gate and Δ L manually set with the path difference of tracking gateiSetting should make Lsi>L0, width LwiAccording between echo
Path difference echo is located exactly in gate, track gate in echo-ranging LiIt is determined using echo-peak method.
Particularly, the step S102 includes: the gate starting point L for tracking gates0With gate widths Lw0In ultrasonic thickness measurement
Cheng Hengding remains that initial setting up is constant, and foundation when initial setting up is gate starting point Ls0Before first echo-signal
Side, gate widths Lw0The fluctuation range of echo-signal should be greater than, track the echo-ranging L in gate0Using echo frontier side
Method determines；The starting point L of i-th of thickness measuring gatesi=L0+ΔLi, wherein Δ LiAccording to thickness measuring gate and tracking lock when being initial setting up
The gate and Δ L that the path difference of door is manually setiSetting should make Lsi>L0, width LwiAccording to the path difference between echo
So that echo is located exactly in gate, the echo-ranging L in gate is trackediIt is determined using echo-peak method, according to calculating institute
The L obtainedsiThe gate starting point of new thickness measuring gate is sent to ultrasound data acquisition instrument in real time, realizes thickness measuring gate to ultrasonic echo
Signal follows.
Echo is swung during the method for following echo in real time of ultrasonic thickness measurement gate proposed by the present invention solves thickness measuring
The inaccurate problem of caused thickness of steel pipe measurement, eliminates the adverse effect that workpiece motion s generate thickness measuring, improves ultrasonic wave
The trace performance of the thickness measuring gate of thickness measuring method realizes the accurate measurement to the steel pipe thickness in motion process, ensure that super
The reliability of sound measurement thickness of steel pipe.
Detailed description of the invention
Fig. 1 is the method flow diagram for following echo in real time of ultrasonic thickness measurement gate provided in an embodiment of the present invention；
Fig. 2 is that the real-time of ultrasonic thickness measurement gate provided in an embodiment of the present invention follows echo process schematic diagram.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is makes to the more thorough of the disclosure understanding
Comprehensively.It should be noted that unless otherwise defined, all technical and scientific terms used herein and belong to of the invention
The normally understood meaning of those skilled in the art is identical.Term as used herein in the specification of the present invention is
In order to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.Term " and or " used herein includes one
Any and all combinations of a or multiple relevant listed items.
It please refers to shown in Fig. 1 and Fig. 2, the method for following echo in real time of ultrasonic thickness measurement gate specifically includes in the present embodiment
Following steps:
S101, tracking gate determine boundary wave trace interval, the sound path of real-time measurement trace interval inner boundary wave, entire
The gate starting point and gate widths that gate is tracked during thickness measuring keep initial setting up constant.
S102, thickness measuring gate adjust gate starting point according to the boundary wave sound path that tracking gate returns in real time and provide in gate
The sound path of echo realizes that thickness measuring gate follows echo.
Track the gate starting point L of gates0With gate widths Lw0It is kept constant during entire thickness measuring, initial setting up is wanted
It is manually set according to the state of current ultrasonic echo, gate starting point Ls0In front of first echo-signal, gate widths
Lw0Greater than the fluctuation range of echo-signal, the echo-ranging L in gate is tracked0It is determined using echo frontier method；I-th of thickness measuring
The starting point L of gatesi=L0+ΔLi, wherein Δ LiIt is manually set when being initial setting up according to thickness measuring gate and the path difference of tracking gate
Fixed gate and Δ LiSetting should make Lsi>L0, width LwiAccording to the path difference between echo echo is located exactly at
In gate, the echo-ranging L in gate is trackediIt is determined using echo-peak method.
Track the gate starting point L of gates0With gate widths Lw0It is constant in ultrasonic thickness measurement process, remain initial setting up
Constant, foundation when initial setting up is gate starting point Ls0In front of first echo-signal, gate widths Lw0It should be greater than back
The fluctuation range of wave signal tracks the echo-ranging L in gate0It is determined using echo frontier method；Of i-th of thickness measuring gate
Point Lsi=L0+ΔLi, wherein Δ LiThe gate manually set when being initial setting up according to the path difference of thickness measuring gate and tracking gate
And Δ LiSetting should make Lsi>L0, width LwiAccording to the path difference between echo echo is located exactly in gate, with
Echo-ranging L in track gateiIt is determined using echo-peak method, ultrasound detection software is according to the resulting L of calculatingsiIn real time to super
Sound data acquisition instrument sends the gate starting point of new thickness measuring gate, realizes that thickness measuring gate follows ultrasound echo signal.
The ultrasonic thickness measurement gate in real time follows echo detailed process is as follows in the present embodiment:
(1) ultrasonic signal is read from ultrasound measuring instrument, obtains signal sequence
X (1), x (2) ..., x (n),
Waving interval [the T of steel pipe motion process median surface wave is shown according to the A sweep of signal sequence1,T2] determine tracking lock
The starting point L of doors0With gate widths Lw0, wherein Ls0And Lw0The following conditions should be met:
Ls0<T1,
Ls0+Lw0>T2
(2) the starting point L of tracking gate is sent to ultrasound measuring instruments0With gate widths Lw0More new command, hereafter track lock
Door keeps initial setting up constant.
(3) by starting point Ls0With gate widths Lw0The beginning and end that corresponding time series is calculated is respectively
K1=2*Ls0/v0*fs
K2=2* (Ls0+Lw0)/v0*fs
Wherein, fsFor the sample rate of ultrasound measuring instrument, v0For the spread speed of ultrasonic wave in steel pipe.
(4) the ultrasonic signal sequence in the current tracking gate of note is
x(K1), x (K1+ 1) ..., x (K2),
X (m) meets if it exists:
x(m-1)<H0,
X (m) >=H0,
K1≤m-1<m≤K2
The then sound path L of boundary wave0
L0=1/fs*m*v0/2
Wherein, H0For the gate level for tracking gate.
(5) the current sound path L of tracking gate is read from ultrasound measuring instrument0, then the gate starting point of i-th of thickness measuring gate
Lsi=L0+ΔLi
Wherein Δ LiWhen being initial setting up according to the gate that manually sets of path difference of thickness measuring gate and tracking gate and
ΔLiSetting should make Lsi>L0, width LwiAccording to the path difference between echo echo is located exactly in gate.
The caused thickness of steel pipe measurement of echo swing is inaccurate during technical solution of the present invention solves the problems, such as thickness measuring,
The adverse effect that workpiece motion s generate thickness measuring is eliminated, the trace performance of the thickness measuring gate of ultrasonic thickness measurement method is improved,
The accurate measurement to the steel pipe thickness in motion process is realized, ensure that the reliability of ultrasonic measurement thickness of steel pipe.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory etc..
The technical principle of the invention is described above in combination with a specific embodiment.These descriptions are intended merely to explain of the invention
Principle, and shall not be construed in any way as a limitation of the scope of protection of the invention.Based on the explanation herein, the technology of this field
Personnel can associate with other specific embodiments of the invention without creative labor, these modes are fallen within
Within protection scope of the present invention.
Claims (2)
1. a kind of method for following echo in real time of ultrasonic thickness measurement gate, which comprises the steps of:
S101, tracking gate determine boundary wave trace interval, the sound path of real-time measurement trace interval inner boundary wave, in entire thickness measuring
The gate starting point and gate widths for tracking gate in the process keep initial setting up constant；Specifically include: the gate for tracking gate rises
PointAnd gate widthsKept constant during entire thickness measuring, initial setting up will according to the state of current ultrasonic echo into
The setting of pedestrian's work, gate starting pointIn front of first echo-signal, gate widthsGreater than the fluctuation model of echo-signal
It encloses, tracks the echo-ranging in gateIt is determined using echo frontier method；The starting point of i-th of thickness measuring gate,
WhereinWhen being initial setting up according to the gate that manually sets of path difference of thickness measuring gate and tracking gate andSetting
It should make, widthAccording to the path difference between echo echo is located exactly in gate, tracks returning in gate
Wave sound journeyIt is determined using echo-peak method；
S102, thickness measuring gate adjust gate starting point according to the boundary wave sound path that tracking gate returns in real time and provide echo in gate
Sound path, realize thickness measuring gate echo is followed.
2. the method for following echo in real time of ultrasonic thickness measurement gate according to claim 1, which is characterized in that the step
S102 includes: the gate starting point for tracking gateAnd gate widthsIt is constant in ultrasonic thickness measurement process, remain initial setting up
Constant, the foundation of initial setting up is gate starting pointIn front of first echo-signal, gate widthsEcho should be greater than
The fluctuation range of signal tracks the echo-ranging in gateIt is determined using echo frontier method；The starting point of i-th of thickness measuring gate, whereinWhen being initial setting up simultaneously according to the gate that manually sets of path difference of thickness measuring gate and tracking gate
AndSetting should make, widthAccording to the path difference between echo echo is located exactly in gate, tracks
Echo-ranging in gateIt is determined using echo-peak method, it is resulting according to calculatingIn real time to ultrasound data acquisition instrument
The gate starting point of new thickness measuring gate is sent, realizes that thickness measuring gate follows ultrasound echo signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107727017A (en) * | 2017-08-30 | 2018-02-23 | 贵州省智能崛起科技有限公司 | A kind of calibrator and measuring method for being used to detect roller shutter door board thickness |
| CN110500974B (en) * | 2019-08-06 | 2021-01-05 | 天津大学 | Workpiece thickness detection method based on improved peak recognition |
| CN112684002B (en) * | 2020-11-26 | 2021-12-14 | 北京理工大学 | Continuous variable-thickness workpiece ultrasonic scanning method |
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| CN1415959A (en) * | 2002-12-20 | 2003-05-07 | 鞍山美斯探伤设备有限公司 | Method of real time tracking bottom echo for ultrasonic crank detection gate |
| CN104237377A (en) * | 2014-09-29 | 2014-12-24 | 南通友联数码技术开发有限公司 | Ultrasonic tracking system and method of pipeline interface waves |
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| US3665754A (en) * | 1967-11-29 | 1972-05-30 | Herbert Krautkramer | Apparatus to prevent mismeasuring of wall thickness gauging by ultrasound |
| DE3905956A1 (en) * | 1989-02-25 | 1990-09-13 | Fraunhofer Ges Forschung | DEVICE FOR MEASURING ULTRASONIC TIME |
| JP5301913B2 (en) * | 2008-08-05 | 2013-09-25 | 株式会社Ｉｈｉ検査計測 | Ultrasonic wall thickness calculation method and apparatus |
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| CN1415959A (en) * | 2002-12-20 | 2003-05-07 | 鞍山美斯探伤设备有限公司 | Method of real time tracking bottom echo for ultrasonic crank detection gate |
| CN104237377A (en) * | 2014-09-29 | 2014-12-24 | 南通友联数码技术开发有限公司 | Ultrasonic tracking system and method of pipeline interface waves |
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