CN106855539A - A kind of anchor rod nondestructive testing method and equipment based on stress wave - Google Patents
A kind of anchor rod nondestructive testing method and equipment based on stress wave Download PDFInfo
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- CN106855539A CN106855539A CN201710048370.6A CN201710048370A CN106855539A CN 106855539 A CN106855539 A CN 106855539A CN 201710048370 A CN201710048370 A CN 201710048370A CN 106855539 A CN106855539 A CN 106855539A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 11
- 230000001133 acceleration Effects 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000003321 amplification Effects 0.000 claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 238000004458 analytical method Methods 0.000 claims abstract description 11
- 230000006378 damage Effects 0.000 claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 102000001253 Protein Kinase Human genes 0.000 claims description 8
- 108060006633 protein kinase Proteins 0.000 claims description 8
- 108091000080 Phosphotransferase Proteins 0.000 claims description 7
- 102000020233 phosphotransferase Human genes 0.000 claims description 7
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- 230000014509 gene expression Effects 0.000 claims description 3
- 238000010606 normalization Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- HJJVPARKXDDIQD-UHFFFAOYSA-N bromuconazole Chemical compound ClC1=CC(Cl)=CC=C1C1(CN2N=CN=C2)OCC(Br)C1 HJJVPARKXDDIQD-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- 230000001066 destructive effect Effects 0.000 description 1
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- 230000036244 malformation Effects 0.000 description 1
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- 230000000644 propagated effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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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
- 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
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
Abstract
The invention discloses a kind of anchor rod nondestructive testing method based on stress wave and equipment, stress wave signal is gathered by acceleration transducer, signal after amplification and filter circuit by being admitted to AD conversion module, digital data transmission is converted analog signals into ARM controller, ARM controller carries out time and frequency domain analysis to signal, according to reflection wave signal in cross correlation algorithm identification stress wave waveform；The present invention can accurately carry out the judgement of the measure and mortar saturation degree of rock-bolt length, and then judge anchor rod anchored quality.The equipment can also be applied carries out anchor pole detection without damage in the side slope using suspension roof support, tunnel, dam body, with wide application value.
Description
Technical field
The invention belongs to mine bolt detection technique field, specifically a kind of anchor pole detection without damage side based on stress wave
Method and equipment.
Background technology
Anchor pole is underground coal mine production and application material widely.Mine anchor rod be it is a kind of be installed in rock-soil layer receive
Power rod member, its one end is connected with engineering works, and the other end is anchored in rock-soil layer, applies pre- gravitation to it if necessary, uses
Effectively to bear structural loads, malformation is prevented, so that the stabilization of enclosed structure building, therefore anchor rod anchored quality
Largely have influence on Safety of Coal Mine Production.
At present, the detection method of Detection of Bolt Bonding Integrity mainly has two kinds in engineering circles, and one kind is to damage detection, and another kind is
Non-Destructive Testing.Damaging detection includes core sample method and drawing experimental method, and the great advantage of both approaches is directly perceived, accurate, but all
It is destructive detection method, and complex operation, workload is big, and expense is huge.Non-Destructive Testing includes stress wave and ultrasonic wave
Method.In practice, decay is serious during signal is propagated in anchor pole, and needs to polish flat termination point of anchor rod for supercritical ultrasonics technology
Just ultrasonic wave-coupled can be entered anchor rod body.
Existing testing equipment has drawing meter, force-measuring anchor stock and the GRANIT type anchor poles based on ultrasonic wave theory lossless
Testing equipment.Both stress detection means of drawing meter, force-measuring anchor stock produce stronger disturbance, drop to the tunnel through bolt anchorage
Low reinforcement effect of the anchor pole to country rock, is suitable only for sampling observation, and be not suitable for large area carries out anchor pole quality examination.GRANIT
Type anchor pole detection without damage equipment, can carry out Non-Destructive Testing to anchor pole, but because the decay of its ultrasonic signal is serious, so generally
Anchor pole within 3.0m can only be detected.
The content of the invention
It is an object of the invention to overcome deficiency of the prior art, and it is lossless to provide a kind of anchor pole based on stress wave
Detection method and equipment, the detection method detect that without destruction workload is small, overcomes the shortcoming and ultrasound for damaging detection to anchor pole
The problem that the signal attenuation of ripple method is serious, measurement length is short.The equipment operation is simple, and environmental suitability is strong, and man-machine interaction is good, surveys
Amount data precision is high, and effect is good, and data processing speed is fast, can measure the anchor pole of more than 10m, and rock-bolt length measurement error is small
In 3%, better than common rock-bolt length testing equipment.
Realizing the technical scheme of the object of the invention is：
A kind of anchor rod nondestructive testing method based on stress wave, specifically includes following steps：
(1) acceleration transducer is installed on the end of free section；
(2) acceleration transducer is connected with Signal-regulated kinase with cable, opens device power supply (DPS), on the lcd screen
It is configured, adjustment equipment to data state to be collected；
(3) free section end is tapped using exciting hammer, produces stress wave；
(4) acceleration transducer collection stress wave signal, and the stress wave signal that will be collected is transferred to signal condition mould
Block；
(5) after the signal that Signal-regulated kinase will be received carries out signal amplification and filtering, AD conversion is transmitted a signal to
Module, by through the data signal after AD conversion, feeding ARM controller module carries out data processing；
(6) shown in lcd screen display module by the data after ARM controller resume module, complete stress
The collection of ripple signal, obtains primary stress waveform figure；
(7) the HHT analyses in lcd screen are clicked on, the Hilbert-Huang transform figure of stress wave waveform is obtained.
(8) waveform obtained according to Hilbert-Huang transform is analyzed, and tries to achieve the length of anchor pole.
(9) finally by the rock-bolt length value in the Hilbert-Huang transform figure of the stress wave waveform in (7) and (8) preserve to
SD card memory module.
In the step (3), exciting hammer taps anchor pole, is continuously tapped 4-6 times using identical frequency and dynamics.
The primary stress waveform figure obtained in the step (6), is using the normalization addition method to multiple stress wave figures
Obtained after being processed.
HHT analyses, are that stress wave waveform is carried out into Hilbert-Huang transform (Hilbert-Huang in described step (7)
Transform, HHT) analyze what is obtained.
The length of anchor pole is sought in described step (8), is the waveform obtained according to HHT analyses, obtain anchoring section reflection letter
Number correspondence time t1Time t corresponding with bottom reflection signal2, the spread speed υ according to stress wave in naked anchor pole1=5130m/
S, using formula l1=(υ1*t1Try to achieve the freedom length l of anchor pole in)/21；According to stress wave anchoring section spread speed υ2=
4700m/s, using formula l2=(υ2*(t2-t1))/2, try to achieve the anchoring depth l of anchor pole2, according to formula l=l1+l2Try to achieve
The total length l of anchor pole.
A kind of anchor pole detection without damage equipment based on stress wave, including acceleration transducer, the signal tune being linked in sequence
Reason module, AD conversion module and ARM controller module, also store including exciting hammer, power module, LCD display module and SD card
Module；Power module is connected with Signal-regulated kinase, AD conversion module and ARM controller module respectively, and ARM controller module is also
It is connected with LCD display module and SD card memory module, acceleration transducer is arranged on anchor pole, exciting hammer taps anchor pole.
Described acceleration transducer is arranged on the end of free section.
Described Signal-regulated kinase, further includes the signal amplification circuit and signal filter circuit being linked in sequence, plus
Velocity sensor is connected with signal amplification circuit, and signal filter circuit is connected with AD conversion module, and signal filter circuit is quadravalence
Butterworth LPF.
Described signal amplification circuit, including the first operational amplifier, first resistor, second resistance, 3rd resistor, the 4th
Resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity and the 7th electric capacity；First computing
The one end of the positive input terminal of amplifier respectively with first resistor, the 3rd electric capacity, the 4th electric capacity is connected, and negative input end is respectively with second
Resistance one end, one end of the 5th electric capacity, the other end connection of the 4th electric capacity；The other end of first resistor and acceleration transducer
Positive output end is connected；The other end of second resistance is connected with the negative output terminal of acceleration transducer；The other end of the 3rd electric capacity,
The other end ground connection of four electric capacity；One end ground connection of the first electric capacity, the second electric capacity, another termination+5V voltages；First operational amplifier
No. 1 pin connect+5V voltages, No. 2 pins connect -5V voltages, and the one end of No. 3 pins respectively with 3rd resistor, the 4th resistance is connected,
No. 4 and No. 5 pin ground connection；The other end ground connection of the 4th resistance；The signal of the other end of 3rd resistor and the first operational amplifier
Output end is connected, and signal output part is also connected with signal filter circuit；
By to two non-essential resistance R3And R4Gain setting is carried out, stability is significantly larger than to be set using single resistance and increased
The instrument amplifier of benefit, gain expressions are：
Described signal filter circuit, including the second operational amplifier, the 3rd operational amplifier, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the 8th resistance, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity and the 11st electric capacity；One end of 5th resistance with
The signal output part connection of the first operational amplifier of signal amplification circuit, the other end respectively with the 6th resistance, the 9th electric capacity
One end connects；The other end of the 6th resistance is connected with the positive input terminal of the second operational amplifier；Second operational amplifier it is just defeated
Enter the one end of end also with the 8th electric capacity to be connected；The other end ground connection of the 8th electric capacity；The negative input end of the second operational amplifier and
The signal output part connection of two operational amplifiers；The other end of the signal output part of the second operational amplifier also with the 9th electric capacity,
One end connection of the 7th resistance；No. 1 pin of the second operational amplifier connects+5V voltages, and No. 2 pins connect -5V voltages；7th resistance
One end respectively with the 8th resistance, the 11st electric capacity of the other end be connected；The other end of the 8th resistance is put with the 3rd computing respectively
The positive input terminal connection of big device；The one end of the positive input terminal of the 3rd operational amplifier also with the tenth electric capacity is connected；Tenth electric capacity
The other end is grounded；No. 1 pin of the 3rd operational amplifier connects+5V voltages, and No. 2 pins connect -5V voltages；3rd operational amplifier
The signal output part other end respectively with the 11st electric capacity, the negative input end of the 3rd operational amplifier, AD conversion module are connected.
A kind of anchor rod nondestructive testing method and equipment based on stress wave that the present invention is provided, measurement effect is good, and takes
Core method, drawing experimental method are compared with supercritical ultrasonics technology, and the present invention has advantages below：
1. this equipment belongs to Non-Destructive Testing, is not damaged in itself to anchor rod anchored；With supercritical ultrasonics technology Dynamic Non-Destruction Measurement
Compare, this equipment avoids ultrasonic signal decay seriously and can only measure the shortcoming of the anchor pole within 3m；
2. the equipment can measure the anchor pole of more than 10m, and rock-bolt length measurement error is less than 3%, better than common anchor
Pole length testing equipment；
3. the portable devices are good, are suitable for measuring anchor pole in complex environment, and having can be with early detection failure, sensitive
The features such as degree height, strong antijamming capability and degree of accuracy high；
4. man-machine interaction is good, can set detection site, date, anchor pole number and sample frequency with input through keyboard, possesses ripple
The function such as the storage of the key of shape one and host computer data analysis.
Brief description of the drawings
Fig. 1 is anchor pole detection model figure of the present invention；
Fig. 2 is assay device structures block diagram of the present invention；
Fig. 3 is signal amplification circuit figure；
Fig. 4 is signal filter circuit figure.
Specific embodiment
The present invention is further elaborated with reference to the accompanying drawings and examples, but is not limitation of the invention.
Embodiment：
A kind of anchor rod nondestructive testing method based on stress wave, specifically includes following steps：
(1) acceleration transducer is installed on anchor pole；
(2) acceleration transducer is connected with Signal-regulated kinase with cable, opens device power supply (DPS), on the lcd screen
It is configured, adjustment equipment to data state to be collected；
(3) free section end is tapped using exciting hammer, produces stress wave；
(4) acceleration transducer collection stress wave signal, and the stress wave signal that will be collected is transferred to signal condition mould
Block；
(5) after the signal that Signal-regulated kinase will be received carries out signal amplification and filtering, AD conversion is transmitted a signal to
Module, by through the data signal after AD conversion, feeding ARM controller module carries out data processing；
(6) shown in lcd screen display module by the data after ARM controller resume module, complete stress
The collection of ripple signal, obtains primary stress waveform figure；
(7) the HHT analyses in lcd screen are clicked on, the Hilbert-Huang transform figure of stress wave waveform is obtained.
(8) waveform obtained according to Hilbert-Huang transform is analyzed, and tries to achieve the length of anchor pole.
(9) finally by the rock-bolt length value in the Hilbert-Huang transform figure of the stress wave waveform in (7) and (8) preserve to
SD card memory module.
Acceleration transducer in the step (1) is arranged on the end of free section.
In the step (3), exciting hammer taps anchor pole, is continuously tapped 4-6 times using identical frequency and dynamics.
The primary stress waveform figure obtained in the step (6), is using the normalization addition method to multiple stress wave figures
Obtained after being processed.
HHT analyses, are that stress wave waveform is carried out into Hilbert-Huang transform (Hilbert-Huang in described step (7)
Transform, HHT) analyze what is obtained.
The length of anchor pole is sought in described step (8), is the waveform obtained according to HHT analyses, obtain anchoring section reflection letter
Number correspondence time t1Time t corresponding with bottom reflection signal2, the spread speed υ according to stress wave in naked anchor pole1=5130m/
S, using formula l1=(υ1*t1Try to achieve the freedom length l of anchor pole in)/21；According to stress wave anchoring section spread speed υ2=
4700m/s, using formula l2=(υ2*(t2-t1))/2, try to achieve the anchoring depth l of anchor pole2, according to formula l=l1+l2Try to achieve
The total length l of anchor pole.
As shown in figure 1, anchor pole includes free segment and anchoring section, free segment refers to that the pulling force at anchor pole head is reached into anchoring body
Region, its function be to anchor pole apply prestressing force；Anchoring section refers to the region that cement slurry bonds presstressed reinforcing steel and soil layer,
Its function is to increase the bonding rubbing action of anchoring body and soil layer, increases the pressure-bearing effect of anchoring body, by the pulling force of free segment
Reach soil body depths；Anchoring interface is the face that free segment and anchoring section join；Bottom is anchor rod anchored section of end tail；Acceleration is passed
Sensor is arranged on free section termination；When measurement is started, tap free section termination using excitation hammer and produce stress wave,
When stress wave is along anchor rod body longitudinal propagation to anchoring interface, a part of stress wave is reflected, and another part stress wave is then
It is transmitted into continuing to propagate in anchoring section, is reflected again when reaching anchoring bottom, ideally, acceleration transducer meeting
Receive reflected signal twice successively.
As shown in Fig. 2 a kind of anchor pole detection without damage equipment based on stress wave, including the acceleration sensing being linked in sequence
Device 1, Signal-regulated kinase, AD conversion module 4 and ARM controller module 5, also including exciting hammer, power module 7, LCD display mould
Block 6 and SD card memory module 8；Power module 7 connects with Signal-regulated kinase, AD conversion module 4 and ARM controller module 5 respectively
Connect, ARM controller module 5 is also connected with LCD display module 6 and SD card memory module 8, acceleration transducer 1 is arranged on anchor pole
On, exciting hammer taps anchor pole.
Described acceleration transducer 1 is arranged on the end of free section.
Described Signal-regulated kinase, further includes the signal amplification circuit 2 and signal filter circuit 3 being linked in sequence,
Acceleration transducer 1 is connected with signal amplification circuit 2, and signal filter circuit 3 is connected with AD conversion module 4, signal filter circuit 3
It is quadravalence Butterworth LPF.
As shown in figure 3, described signal amplification circuit 2, including the first operational amplifier U1, first resistor R1, the second electricity
Resistance R2,3rd resistor R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electricity
Hold C5, the 6th electric capacity C6 and the 7th electric capacity C7；The positive input terminal of the first operational amplifier respectively with first resistor R1, the 3rd electric capacity
C3, the 4th electric capacity C4 one end connection, negative input end respectively with second resistance R2 one end, one end of the 5th electric capacity C5, the 4th electricity
Hold the other end connection of C4；The other end of first resistor R1 is connected with the positive output end of acceleration transducer；The R2 of second resistance
The other end is connected with the negative output terminal of acceleration transducer；The other end of the 3rd electric capacity C3, the other end ground connection of the 4th electric capacity C4；
One end ground connection of the first electric capacity C1, the second electric capacity C2, another termination+5V voltages；No. 1 pin of the first operational amplifier U1 connects+
5V voltages, No. 2 pins connect -5V voltages, and the one end of No. 3 pins respectively with 3rd resistor R3, the 4th resistance R4 is connected, No. 4 and No. 5
Pin is grounded；The other end ground connection of the 4th resistance R4；The other end of 3rd resistor R3 is defeated with the signal of the first operational amplifier U1
Go out end connection, signal output part is also connected with signal filter circuit 3；
By to two non-essential resistance R3And R4Gain setting is carried out, stability is significantly larger than to be set using single resistance and increased
The instrument amplifier of benefit, gain expressions are：
As shown in figure 4, described signal filter circuit 3, including the second operational amplifier U3, the 3rd operational amplifier U4,
5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 8th electric capacity C8, the 9th electric capacity C9, the tenth electric capacity C10
With the 11st electric capacity C11；One end of 5th resistance R5 and the signal output part of the first operational amplifier U1 of signal amplification circuit
Connection, the one end of the other end respectively with the 6th resistance R6, the 9th electric capacity C9 is connected；The other end of the 6th resistance R6 and the second computing
The positive input terminal connection of amplifier U2；The one end of the positive input terminal of the second operational amplifier U2 also with the 8th electric capacity C8 is connected；The
The other end ground connection of eight electric capacity C8；The signal output part of the negative input end of the second operational amplifier U2 and the second operational amplifier U2
Connection；The other end of the signal output part of the second operational amplifier U2 also with the 9th electric capacity C9, one end of the 7th resistance R7 are connected；
No. 1 pin of the second operational amplifier U2 connects+5V voltages, and No. 2 pins connect -5V voltages；The other end of the 7th resistance R7 respectively with
One end connection of the 8th resistance R8, the 11st electric capacity C11；The other end of the 8th resistance R8 is respectively with the 3rd operational amplifier U3's
Positive input terminal is connected；The one end of the positive input terminal of the 3rd operational amplifier U3 also with the tenth electric capacity C10 is connected；Tenth electric capacity C10
The other end ground connection；No. 1 pin of the 3rd operational amplifier U3 connects+5V voltages, and No. 2 pins connect -5V voltages；3rd operation amplifier
The signal output part of the device U3 other end, negative input end, the AD conversion of the 3rd operational amplifier U3 respectively with the 11st electric capacity C11
Module 4 is connected.
Claims (10)
1. a kind of anchor rod nondestructive testing method based on stress wave, it is characterised in that specifically include following steps：
(1) acceleration transducer is installed on the end of free section；
(2) acceleration transducer is connected with Signal-regulated kinase with cable, opens device power supply (DPS), carried out on the lcd screen
Set, adjustment equipment to data state to be collected；
(3) free section end is tapped using exciting hammer, produces stress wave；
(4) acceleration transducer collection stress wave signal, and the stress wave signal that will be collected is transferred to Signal-regulated kinase；
(5) after the signal that Signal-regulated kinase will be received carries out signal amplification and filtering, AD conversion module is transmitted a signal to,
By through the data signal after AD conversion, feeding ARM controller module carries out data processing；
(6) shown in lcd screen display module by the data after ARM controller resume module, complete stress wave letter
Number collection, obtain primary stress waveform figure；
(7) the HHT analyses in lcd screen are clicked on, the Hilbert-Huang transform figure of stress wave waveform is obtained.
(8) waveform obtained according to Hilbert-Huang transform is analyzed, and tries to achieve the length of anchor pole.
(9) finally the rock-bolt length value in the Hilbert-Huang transform figure of the stress wave waveform in (7) and (8) is preserved to SD card
Memory module.
2. method according to claim 1, it is characterised in that in the step (3), exciting hammer taps anchor pole, using phase
Same frequency and dynamics is continuously tapped 4-6 times.
3. method according to claim 1, it is characterised in that the primary stress waveform figure obtained in the step (6), be
Obtained after being processed using the normalization addition method multiple stress wave figures.
4. method according to claim 1, it is characterised in that HHT analyses in described step (7), are by stress wave ripple
Shape carries out what Hilbert-Huang transform (Hilbert-Huang Transform, HHT) analysis was obtained.
5. method according to claim 1, it is characterised in that the length of anchor pole is sought in described step (8), is basis
The waveform that HHT analyses are obtained, obtains anchoring section reflected signal correspondence time t1Time t corresponding with bottom reflection signal2, according to should
Spread speed υ of the Reeb in naked anchor pole1=5130m/s, using formula l1=(υ1*t1Try to achieve the freedom length of anchor pole in)/2
l1；According to stress wave anchoring section spread speed υ2=4700m/s, using formula l2=(υ2*(t2-t1))/2, try to achieve anchor pole
Anchoring depth l2, according to formula l=l1+l2Try to achieve the total length l of anchor pole.
6. a kind of anchor pole detection without damage equipment based on stress wave, it is characterised in that including the acceleration sensing being linked in sequence
Device, Signal-regulated kinase, AD conversion module and ARM controller module, also including exciting hammer, power module, LCD display module and
SD card memory module；Power module is connected with Signal-regulated kinase, AD conversion module and ARM controller module respectively, ARM controls
Device module is also connected with LCD display module and SD card memory module, and acceleration transducer is arranged on anchor pole, and exciting hammer taps anchor
Bar.
7. equipment according to claim 6, it is characterised in that described acceleration transducer is arranged on free section
End.
8. equipment according to claim 6, it is characterised in that described Signal-regulated kinase, further includes that order connects
The signal amplification circuit and signal filter circuit for connecing, acceleration transducer are connected with signal amplification circuit, signal filter circuit with
AD conversion module is connected, and signal filter circuit is quadravalence Butterworth LPF.
9. equipment according to claim 8, it is characterised in that described signal amplification circuit, including the first operation amplifier
Device, first resistor, second resistance, 3rd resistor, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity,
Five electric capacity, the 6th electric capacity and the 7th electric capacity；The positive input terminal of the first operational amplifier respectively with first resistor, the 3rd electric capacity,
One end connection of four electric capacity, negative input end connects with the other end of second resistance one end, one end of the 5th electric capacity, the 4th electric capacity respectively
Connect；The other end of first resistor is connected with the positive output end of acceleration transducer；The other end and acceleration sensing of second resistance
The negative output terminal connection of device；The other end of the 3rd electric capacity, the other end ground connection of the 4th electric capacity；The one of first electric capacity, the second electric capacity
End ground connection, another termination+5V voltages；No. 1 pin of the first operational amplifier connects+5V voltages, and No. 2 pins connect -5V voltages, No. 3
The one end of pin respectively with 3rd resistor, the 4th resistance is connected, No. 4 and No. 5 pin ground connection；The other end ground connection of the 4th resistance；
The other end of 3rd resistor is connected with the signal output part of the first operational amplifier, and signal output part also connects with signal filter circuit
Connect；
By to two non-essential resistance R3And R4Gain setting is carried out, stability is significantly larger than and sets gain using single resistance
Instrument amplifier, gain expressions are：
10. equipment according to claim 8, it is characterised in that described signal filter circuit, including the second operation amplifier
Device, the 3rd operational amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 8th electric capacity, the 9th electric capacity, the tenth
Electric capacity and the 11st electric capacity；One end of 5th resistance connects with the signal output part of the first operational amplifier of signal amplification circuit
Connect, the one end of the other end respectively with the 6th resistance, the 9th electric capacity is connected；The other end of the 6th resistance and the second operational amplifier
Positive input terminal is connected；The one end of the positive input terminal of the second operational amplifier also with the 8th electric capacity is connected；The other end of the 8th electric capacity
Ground connection；The negative input end of the second operational amplifier is connected with the signal output part of the second operational amplifier；Second operational amplifier
The other end of the signal output part also with the 9th electric capacity, one end of the 7th resistance is connected；No. 1 pin of the second operational amplifier connects
+ 5V voltages, No. 2 pins connect -5V voltages；The one end of the other end of the 7th resistance respectively with the 8th resistance, the 11st electric capacity is connected；
Positive input terminal of the other end of the 8th resistance respectively with the 3rd operational amplifier is connected；The positive input terminal of the 3rd operational amplifier is also
One end with the tenth electric capacity is connected；The other end ground connection of the tenth electric capacity；No. 1 pin of the 3rd operational amplifier connects+5V voltages, 2
Number pin connects -5V voltages；The signal output part of the 3rd operational amplifier other end respectively with the 11st electric capacity, the 3rd computing are put
The negative input end of big device, AD conversion module connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710048370.6A CN106855539A (en) | 2017-01-20 | 2017-01-20 | A kind of anchor rod nondestructive testing method and equipment based on stress wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710048370.6A CN106855539A (en) | 2017-01-20 | 2017-01-20 | A kind of anchor rod nondestructive testing method and equipment based on stress wave |
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| Publication Number | Publication Date |
|---|---|
| CN106855539A true CN106855539A (en) | 2017-06-16 |
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Cited By (5)
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| CN111765856A (en) * | 2020-06-18 | 2020-10-13 | 浙江化工工程地质勘察院有限公司 | Nondestructive detection device and method for effective anchoring depth of anchor rod |
| CN111766298A (en) * | 2020-06-30 | 2020-10-13 | 武汉市工程科学技术研究院 | Novel anchor rod nondestructive testing method |
| CN113252782A (en) * | 2021-04-30 | 2021-08-13 | 国家电网有限公司 | Signal acquisition device and method for nondestructive testing of quality of multi-defect long anchor cable |
| CN113686954A (en) * | 2021-07-14 | 2021-11-23 | 中国水利水电科学研究院 | Exciting small hammer for detecting stress wave of anchor rod and using method thereof |
| TWI805143B (en) * | 2021-12-21 | 2023-06-11 | 建國科技大學 | A hands-free mobile device capable of closely attaching sensing probes of stress wave to iron objects |
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| TWI805143B (en) * | 2021-12-21 | 2023-06-11 | 建國科技大學 | A hands-free mobile device capable of closely attaching sensing probes of stress wave to iron objects |
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