CN106525969A - Device and method for carrying out nondestructive testing on anchor rod by adopting cosine linear scanning signal - Google Patents
Device and method for carrying out nondestructive testing on anchor rod by adopting cosine linear scanning signal Download PDFInfo
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- CN106525969A CN106525969A CN201610968819.6A CN201610968819A CN106525969A CN 106525969 A CN106525969 A CN 106525969A CN 201610968819 A CN201610968819 A CN 201610968819A CN 106525969 A CN106525969 A CN 106525969A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009659 non-destructive testing Methods 0.000 title description 2
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 239000000523 sample Substances 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 7
- 230000007547 defect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000001303 quality assessment method Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
-
- 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
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/341—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics
- G01N29/345—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics continuous waves
-
- 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
-
- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
-
- 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
- G01N2291/26—Scanned objects
- G01N2291/262—Linear objects
- G01N2291/2626—Wires, bars, rods
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a device and a method for carrying out nondestructive detection on an anchor rod by adopting cosine linear scanning signals, wherein the cosine linear scanning codes are adopted to transmit sound wave signals with password information, simultaneously, reflected sound wave signals from the interior of a rod body are received, and the received signals are decoded to restore the transmitted real detection signals, wherein a signal transmitting and receiving probe consists of a piezoelectric crystal (6), a giant magnetostrictive rod (3), a stainless steel shell (1) and an anchor rod head sleeve (2). The invention has strong anti-interference capability, no erroneous judgment and high detection accuracy.
Description
Technical field
The present invention relates to the device and method of anchor pole detection without damage, belongs to engineering detecting field.
Background technology
Anchor pole detection without damage be side slope and cavity engineering construction in a kind of widely used detection method, mainly by
Head is fired using sound wave and is received, and the reflection case produced in the middle of bar bottom and bar according to sound wave is detecting rock-bolt length
And compactness of grouting.The method is the one-dimensional bounce technique of sound wave, as sound wave can produce the conversion of complexity in the body of rod and easily receive
The noise jamming of surrounding, haves the shortcomings that in detection work that interference is big, reflection wave signal is weak, accuracy of detection is low.
The content of the invention
The technical problem to be solved in the present invention is：There is provided one kind carries out anchor pole detection without damage using cosine scanning signal
Device and method, there is strong antijamming capability, will not to produce erroneous judgement, Detection accuracy high.
Technical scheme is as follows：
A kind of method that employing cosine scanning signal carries out anchor pole detection without damage, comprises the steps：
1. a cosine signal with certain hour length, initial frequency and termination frequency is generated by program coding,
Emitted transducer produces cosine vibration signal, exports the vibration signal as transmission signal Dao anchor pole body in, while receiving
Reflected signal inside the body of rod；
2. the reflected signal to receiving is decoded, decoding using Fourier analysis method, decoding kernel function, angular frequency,
Starting is identical with transmission signal with termination frequency；
3. the reflected signal of bar bottom and shaft is extracted, detection anchor pole is passed judgment on.
The present invention generates a cosine letter with certain hour length, initial frequency and termination frequency by program coding
Number (the characteristics of there is big initial displacement, easy identification, high precision due to cosine signal, so cosine signal is selected in anchor pole detection,
And do not select sinusoidal signal), colonized in memory, during use, signaling module is sent it to by computer instruction
On, it is amplified to be added to generation cosine vibration signal on transmitting transducer (the cannot-harm-detection device hereinafter mentioned), enter
In detected anchor pole body, when cosine signal is propagated in the anchor pole body, the sound waves such as mortar cavity, leakiness, anchor pole bottom are run into anti-
When penetrating layer, can be reflected back, be received and recorded by the reception sensor of rock bolt head again.The signal that sensor is received is not
Only it is reflection cosine signal, also includes that the cosine wave from head transmitting, side wave, interference involve some other sound waves, in order to
Echo is only extracted, just the signal for receiving must be decoded, that is, only retained as the cosine signal of transmitting
Reflection cosine signal.Decoding is decoded kernel function, angular frequency, starting and is terminated frequency and launch letter using Fourier analysis method
It is number identical, through decoding, cosine reflected signal is only remained, other signals are filtered out entirely.
The step 3. in, using Li=VGT×TiAll pip length are calculated, farthest pip is bar bottom, before
Pip be defect, and into related in front and back, calculate defect length respectively, finally useComputational length is qualified
Percentage ratio ηL, useCalculate slip casting saturation percentage ratio ηB, wherein LiEnd points is exposed away from bar for pip
Length, VGTFor body of rod wave velocity, TiFor each pip time, LJFor anchor pole measured length, LsFor Soil Anchor Design length,
For cavity cumulative length.
Draw above-mentioned ηLAnd ηBAfterwards, anchor pole quality assessment is carried out with reference to the form of Figure of description 6.
A kind of the cannot-harm-detection device with above-mentioned lossless detection method, including the power module, acoustic signals that are sequentially connected
Transmitting and receiver module and signal transmitting and receiving transducer；The detection probe includes the rustless steel that one end is anchor pole headgear cylinder
Shell, is provided with clamping screw on anchor pole headgear cylinder, is packaged with giant magnetostrictive rod, outside giant magnetostrictive rod in stainless steel casing
Side is excitation coil, and it is piezoquartz to have between giant magnetostrictive rod and anchor pole headgear cylinder in vibration isolator, vibration isolation body, piezoquartz
Metal gasket is provided between anchor pole headgear cylinder.
The power module includes charging module, accumulator and the boosting rectification module being sequentially connected.
The acoustic signals transmitting and receiver module include：It is main by signal generator, encoder, D/A converter and when
The transmitter module of clock control system composition, and be mainly made up of with storage device dual channel receiver device, A/D converter, display
Receiver module, transmitter module, receiver module and signal amplification unit connection.
The present invention adopts cosine scanning encoding, acoustic signals of the transmitting with encrypted message, while receiving from bar
The reflected sonic signals in portion, are decoded by the signal to receiving in vivo, reduce the true detection signal launched, and are judged
The length and cavity length of detection anchor pole.The present invention has strong antijamming capability, will not to produce erroneous judgement, Detection accuracy height etc. excellent
Point.
Description of the drawings
Fig. 1 is the cross-sectional view of signal transmitting of the present invention and receiving transducer；
Fig. 2 is the Non-Destructive Testing schematic diagram of the present invention；
Fig. 3 is the composition schematic diagram of the cannot-harm-detection device of the present invention；
Fig. 4 is that transmission signal encodes flow chart；
Fig. 5 is reception decoding process figure；
Fig. 6 is anchor pole criteria of quality evaluation form.
Specific embodiment
As shown in figure 3, the cannot-harm-detection device power module, acoustic signals transmitting and the receiver module that include being sequentially connected with
And signal transmitting and receiving transducer.Power module is made up of charging module, accumulator, 3 part of boosting rectification module；Transmitter module
Including signal generator, encoder, D/A converter, 5 part of signal amplifier and clock controller；Receiver module includes 2 passages
Reception, A/D converter, display and storage；
As shown in figure 1, detection probe includes the stainless steel casing 1 that one end is anchor pole headgear cylinder 2, set on anchor pole headgear cylinder 2
Clamping screw 8 is equipped with, in stainless steel casing 1, giant magnetostrictive rod 3 is packaged with, is excitation coil 4 on the outside of giant magnetostrictive rod 3,
There is vibration isolator 5 between giant magnetostrictive rod 3 and anchor pole headgear cylinder 2, (piezoelectric ceramics receives brilliant for piezoquartz 6 in vibration isolator 5
Body), metal gasket 7 is provided between piezoquartz 6 and anchor pole headgear cylinder 2.
As shown in Fig. 2 during detection, anchor pole headgear cylinder 2 being enclosed within anchor pole exposure end, being tightened with clamping screw 8.
As shown in figure 4, transmission signal is encoded, when code current passes through excitation coil 4, giant magnetostrictive rod 3
As encoded signal transmitting is flexible, the acoustic signals consistent with coding are produced, on the incoming body of rod of Jing heads, when these signals are passed through
When having the position of cavity and reaching the other end of bar, just reflect, received by piezoquartz 6.
Detection signal process and calculating：Detection signal file is copied in computer, is processed by Fig. 5 flow processs.To inspection
After survey signal is decoded, the reflected signal of bar bottom and shaft is extracted, using Li=VGT×Ti(LiIt is pip away from bar exposed junction
The length of point, VGTFor body of rod wave velocity, TiFor each pip time) all pip length are calculated, farthest pip is bar
Bottom, pip before is defect, and into related in front and back, calculate defect length respectively, finally use(LJFor
Anchor pole measured length, LsFor Soil Anchor Design length) the qualified percentage ratio η of computational lengthL, use(LJFor anchor
Bar measured length,For cavity cumulative length) calculate slip casting saturation percentage ratio ηB。
Draw above-mentioned ηLAnd ηBAfterwards, anchor pole quality assessment is carried out with reference to the form of Figure of description 6.
Below using a specific embodiment come illustrate the present invention flow process and equipment：
Certain side slope adopts 1m × 1m concrete grid supportings, screw-thread steel of the grid intersections using Φ 26, length 5m～10m
Suspension roof support, now needs to detect rock-bolt length, compactness of grouting, evaluates anchor rod anchored effect.Detecting instrument and technology：
(1) anchor pole detection without damage instrument
The transmitting of anchor pole detection without damage instrument and to receive signal be sound wave cosine scanning signal, its main performance index
For：1 road of port number, 100～20000Hz of passband.Main frame acoustic signal generator shakes for high accuracy, high-resolution crystal frequency
Swing generator, 16 A/D conversions, the signal amplifier of dynamic range 144dB, when clock controller is high-precision quartz crystal oscillator type
Clock control chip.Using 1G electronic hard discs, display screen is 14 inch liquid crystal screens for main frame storage.
Cosine harmonics transmitting length is 0.5 cycle, 100 μ s of duration, scans original frequency 2000Hz, terminates frequency and is
10000Hz, Signal coding adopt cosine Taylor series expansion technology, and the decoding for receiving signal adopts Fourier transform.
(2) detection probe is to integrate the sonic probe that super magnetic transmitting and piezoelectricity are received, and during work, super magnet is in main frame
Cosine acoustic signals are produced under emission control, signal traveled in anchor pole, run into when not protecting full defect or bar bottom, can produce back
Ripple, echo are reflected along the body of rod and are received by piezoelectrics.Transmitting and reception amplitude error are less than 5%, and phase contrast is less than 0.1 μ
s.Detection probe structure such as Fig. 1, stainless steel casing 1 are probe metal shell, and anchor pole headgear cylinder 2 carries embedding groove, and super mangneto is stretched
Contracting rod 3 is rare earth axial orientation polycrystalline giant magnetostrictive material, is excitation coil 4 on the outside of which, and vibration isolator 5 is that silica gel vibration isolation is filled
Body, which is internal to receive piezoquartz 6, and piezoquartz 6 is thickness 2mm, diameter 8mm, medium frequency 100～30000Hz's of scope
Piezoelectrics, the side of piezoquartz 6 is that sound conducts metal gasket 7.
Detection process：
(1) instrument in-situ processing
Linked network on anchor pole, laitance are first removed before Site Detection, the head being imbedded on concrete are dug out using instrument,
Head is made to expose no less than 5cm.
(2) instrument connection and installation
The inlaid hole of probe is first full of, so by the connection of instrument, probe and anchor pole such as Fig. 2 and Fig. 3 with binding agents such as butter
Afterwards probe is embedded in head, is tightened with screw, between head and probe, not should be cavity, to ensure that sonication is propagated.
(3) Site Detection
After installing instrument, the engineering characteristics parameters such as detection engineering, project, anchor pole numbering are set, detection date, instrument are set
The responsibility parameter such as device, testing staff, setting record length, trace interval, detection signal sweep length, scanning are initial and whole
The only Instrument working parameter such as frequency, signal gain.
Each anchor pole carries out 3 detections, the waveform similarity of 3 detections.
Detection signal is decoded and analyses：
(1) decode：
The signal of detection is passed on computer, is decoded using sound wave cosine sweep decoding software, display is received
Echo-signal, the decoded signal of 3 signals of each anchor pole detection is identical.
(2) explain：
Without echo, decoded signal illustrates that anchor pole body length exceedes scanning signal and receives time range, or transmission signal
Energy is weak；One or more echoes, calculate out-of-the way position using comprehensive body of rod speed and echo time, it is farthest for bar it is low anti-
Penetrate, length is that bar is long, other for defect and defective locations.
Claims (5)
1. a kind of method that employing cosine scanning signal carries out anchor pole detection without damage, it is characterised in that comprise the steps：
1. a cosine signal with certain hour length, initial frequency and termination frequency is generated by program coding, Jing sends out
Penetrate transducer produce cosine vibration signal, using the vibration signal as transmission signal export Dao anchor pole body in, while reception from
Reflected signal inside the body of rod；
2. the reflected signal to receiving is decoded, and decoding is using Fourier analysis method, decoding kernel function, angular frequency, starting
Frequency is identical with transmission signal with terminating；
3. the reflected signal of bar bottom and shaft is extracted, detection anchor pole is passed judgment on.
2. the method that employing cosine scanning signal according to claim 1 carries out anchor pole detection without damage, its feature exist
In：The step 3. in, using Li=VGT×TiCalculate all pip length, farthest pip is bar bottom, before anti-
Exit point is defect, and into related in front and back, calculate defect length respectively, finally useThe qualified percentage of computational length
Compare ηL, useCalculate slip casting saturation percentage ratio ηB, wherein LiThe length of end points is exposed away from bar for pip
Degree, VGTFor body of rod wave velocity, TiFor each pip time, LJFor anchor pole measured length, LsFor Soil Anchor Design length,For sky
Chamber cumulative length.
3. a kind of the cannot-harm-detection device for claim 1 methods described, it is characterised in that：Including the power supply mould being sequentially connected
Block, acoustic signals transmitting and receiver module and signal transmitting and receiving transducer；
The detection probe includes the stainless steel casing (1) that one end is anchor pole headgear cylinder (2), is provided with anchor pole headgear cylinder (2)
Giant magnetostrictive rod (3) is packaged with clamping screw (8), stainless steel casing (1), be excitation line on the outside of giant magnetostrictive rod (3)
Circle (4), it is piezoquartz (6) to have between giant magnetostrictive rod (3) and anchor pole headgear cylinder (2) in vibration isolator (5), vibration isolator (5),
Metal gasket (7) is provided between piezoquartz (6) and anchor pole headgear cylinder (2).
4. the cannot-harm-detection device according to claim 3, it is characterised in that：The power module includes that what is be sequentially connected fills
Electric module, accumulator and boosting rectification module.
5. the cannot-harm-detection device according to claim 3, it is characterised in that：The acoustic signals transmitting and receiver module bag
Include：The main transmitter module being made up of signal generator, encoder, D/A converter and clock control system, and it is main by double
The receiver module that duct receiver, A/D converter, display are constituted with storage device.
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| CN201610968819.6A CN106525969A (en) | 2016-10-27 | 2016-10-27 | Device and method for carrying out nondestructive testing on anchor rod by adopting cosine linear scanning signal |
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| CN201610968819.6A CN106525969A (en) | 2016-10-27 | 2016-10-27 | Device and method for carrying out nondestructive testing on anchor rod by adopting cosine linear scanning signal |
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Cited By (5)
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| CN107526099A (en) * | 2017-08-25 | 2017-12-29 | 武汉市工程科学技术研究院 | The super magnetic focus of pseudorandom spread spectrum and source signal method for generation for engineering geophysics |
| CN107976484A (en) * | 2017-11-22 | 2018-05-01 | 武汉市工程科学技术研究院 | Linear frequency modulation anchor pole detects transceiver sensor and anchor pole detection method |
| CN111965254A (en) * | 2019-11-05 | 2020-11-20 | 中国葛洲坝集团第二工程有限公司 | Nondestructive testing method for long exposed anchor rod |
| CN112729176A (en) * | 2021-02-05 | 2021-04-30 | 河南理工大学 | Ultrasonic nondestructive testing device for detecting length of anchor rod in different media |
| CN114200016A (en) * | 2021-10-18 | 2022-03-18 | 中国科学院武汉岩土力学研究所 | Double-channel nondestructive detection method for rock anchor rod and related equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526099A (en) * | 2017-08-25 | 2017-12-29 | 武汉市工程科学技术研究院 | The super magnetic focus of pseudorandom spread spectrum and source signal method for generation for engineering geophysics |
| CN107976484A (en) * | 2017-11-22 | 2018-05-01 | 武汉市工程科学技术研究院 | Linear frequency modulation anchor pole detects transceiver sensor and anchor pole detection method |
| CN111965254A (en) * | 2019-11-05 | 2020-11-20 | 中国葛洲坝集团第二工程有限公司 | Nondestructive testing method for long exposed anchor rod |
| CN112729176A (en) * | 2021-02-05 | 2021-04-30 | 河南理工大学 | Ultrasonic nondestructive testing device for detecting length of anchor rod in different media |
| CN114200016A (en) * | 2021-10-18 | 2022-03-18 | 中国科学院武汉岩土力学研究所 | Double-channel nondestructive detection method for rock anchor rod and related equipment |
| CN114200016B (en) * | 2021-10-18 | 2024-04-16 | 中国科学院武汉岩土力学研究所 | Double-channel nondestructive testing method and related equipment for rock anchor rod |
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Application publication date: 20170322 |