CN102168943B - Method for detecting embedment depth of ferromagnetic tubes/rods - Google Patents
Method for detecting embedment depth of ferromagnetic tubes/rods Download PDFInfo
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- CN102168943B CN102168943B CN2010106001048A CN201010600104A CN102168943B CN 102168943 B CN102168943 B CN 102168943B CN 2010106001048 A CN2010106001048 A CN 2010106001048A CN 201010600104 A CN201010600104 A CN 201010600104A CN 102168943 B CN102168943 B CN 102168943B
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Abstract
The invention discloses a method for detecting the embedment depth of ferromagnetic tubes/rods, which comprises the following steps of: magnetizing a plurality of ferromagnetic tubes/rods which have different lengths and serve as calibration pieces by using the same magnet; after each ferromagnetic tube/rod is magnetized, testing the magnetic field intensity at a certain position of each ferromagnetic tube/rod by using the same device for testing the magnetic field intensity to obtain a relation curve of the correspondence of the length of each ferromagnetic tube/rod and the magnetic field intensity of the position of the determined length distance in each ferromagnetic tube/rod by calibrating, wherein the length sizes from the test positions of ferromagnetic tubes/rods for calibrating to the end faces of the ends, which are close to the magnet, of the ferromagnetic tubes/rods are the same; and in the process of actual measurement, obtaining the total length of each ferromagnetic tube/rod of an actual measurement piece by measuring the magnetic field intensity at the same distance position, and then obtaining the size of the embedment depth of each ferromagnetic tube/rod of the actual measurement piece. The method has the characteristics of convenience for test and implementation and reliable evaluation.
Description
Technical field
The present invention relates to a kind of lossless detection method, particularly relate to the detection method of a kind of ferromagnetism pipe/excellent length of embedment.
Background technology
Pipe/rod is common a kind of material in the construction; Its a kind of purposes is to use as anchor pole; Such as at water conservancy and hydropower, construction of road and bridge just needs to use a large amount of anchor poles in the urban architecture; These anchor poles mainly play support action, are about to anchor pole and imbed in rock or soil or the cement to strengthen support capacity.In the civil engineering work quality evaluation, need usually to understand to imbed the reinforcing bar length in the soil or in the cement, because the length of embedment of anchor pole is related to the fixed mass of anchor pole.Owing to many-sided reason, in the prior art detection of the anchoring quality of anchor pole and stress still rested on and utilize hydraulic jack to carry out the destructive pull-out test stage; This kind detection means needs the labor manpower and materials, the more important thing is that it has produced stronger disturbance to structure, has in fact destroyed anchor structure.Existing Non-Destructive Testing mode is to adopt method such as acoustics to detect; Yet often reaching, detection methods such as existing acoustics do not survey long purpose; This is because anchor rod anchored material (like cement, mortar) combines very tight with reinforcing bar; Make that Acoustic detection (like sound pulse, electromagnetic sound, knock detection method) SATT is rapid unusually, and waveform transformation is complicated, instrument can not receive useful echoed signal.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; The detection method of a kind of ferromagnetism pipe/excellent length of embedment is provided; Be to adopt the method that detects electromagnetism intensity to detect the entire length of ferromagnetism pipe/rod; And then deduct the ferromagnetism part that pipe/rod is not imbedded, and can draw the length of embedment of ferromagnetism pipe/rod, have characteristics easy to detect, that estimate reliably, be convenient to realize.
The technical solution adopted for the present invention to solve the technical problems is: the detection method of a kind of ferromagnetism pipe/excellent length of embedment comprises and demarcates and survey two processes:
In calibration process, comprise the steps:
A. the end face at an end of the demarcation ferromagnetism pipe/rod of a known certain-length pastes the magnet of putting a standard sample, utilizes the magnet of this standard sample to let demarcation ferromagnetism pipe/rod of this known certain-length magnetize;
B. at the end near magnet of the demarcation ferromagnetism pipe/rod of this known certain-length; Have the magnetic field intensity of the position of a definite length distance with test magnetic field intensity device to test this demarcations ferromagnetism pipe/end face of excellent middle distance this end, thereby the known length that obtains one group of demarcation ferromagnetism pipe/rod becomes the data of corresponding relation with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod;
C. constantly change the known length of demarcating ferromagnetism pipe/rod and adopt the identical distance of measured length really; Repeating step A and step B, thus some groups of different known length of demarcating ferromagnetism pipe/rods become one-to-one relationship with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod data obtained;
D. said some groups of data processing are become the corresponding relation curve of magnetic field intensity of confirming the position of length distance described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod by computer processing system, and the data of this relation curve are kept in the computer processing system;
In the actual measurement process, comprise the steps:
E. the end face at the end that exposes of the ferromagnetism pipe/rod of actual measurement part pastes the magnet put a standard sample identical with said step a, utilizes the magnet of this standard sample to let the ferromagnetism pipe/rod of surveying part magnetize;
F. at the end that exposes of ferromagnetism pipe/rod of actual measurement part; Ferromagnetism pipe/rod of testing this actual measurement part with a test magnetic field intensity device identical with said step b has the magnetic field intensity of the position of an identical distance of measured length really with said step b apart from the end face of this end, thereby obtains in the ferromagnetism pipe/rod of an actual measurement part data corresponding to the magnetic field intensity of the position of said definite length distance;
The data of the ferromagnetism pipe/excellent magnetic field intensity of the actual measurement part that g. step f is obtained by computer processing system are brought in the relation curve that steps d obtains, thereby obtain the corresponding length of the ferromagnetism pipe/rod of actual measurement part;
The length of h. testing the revealed section of the ferromagnetism pipe/excellent magnetic field intensity of surveying part with existing conventional measuring method or lossless detection method; The length dimension that step g obtained is deducted the length dimension of revealed section, thereby obtain the size of length of embedment of the ferromagnetism pipe/rod of actual measurement part.
The present invention solves another technical scheme that its technical matters adopts: the detection method of a kind of ferromagnetism pipe/excellent length of embedment comprises and demarcates and survey two processes:
In calibration process, comprise the steps:
A. the end face at an end of the demarcation ferromagnetism pipe/rod of a known certain-length pastes the magnet of putting a standard sample, utilizes the magnet of this standard sample to let demarcation ferromagnetism pipe/rod of this known certain-length magnetize;
B. at the end near magnet of the demarcation ferromagnetism pipe/rod of this known certain-length; Have the magnetic field intensity of the position of a definite length distance with test magnetic field intensity device to test this demarcations ferromagnetism pipe/end face of excellent middle distance this end, thereby the known length that obtains one group of demarcation ferromagnetism pipe/rod becomes the data of corresponding relation with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod;
C. constantly change the known length of demarcating ferromagnetism pipe/rod and adopt the identical distance of measured length really; Repeating step A and step B, thus some groups of different known length of demarcating ferromagnetism pipe/rods become one-to-one relationship with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod data obtained;
D. said some groups of data processing are become the corresponding relation curve of magnetic field intensity of confirming the position of length distance described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod by computer processing system, and the data of this relation curve are kept in the computer processing system;
In the actual measurement process, comprise the steps:
E. with one confirm in advance good size and with the ferromagnetism pipe/rod of actual measurement part have identical material addition type ferromagnetism pipe/rod one terminate at the ferromagnetism pipe/rod of actual measurement part an end that exposes, and the end face of addition type ferromagnetism pipe/rod and survey smooth joining of end face of the ferromagnetism pipe/rod of part; The other end at addition type ferromagnetism pipe/rod pastes the magnet of putting a standard sample identical with said steps A, utilizes the magnet of this standard sample to magnetize simultaneously by the ferromagnetism pipe/rod of addition type ferromagnetism pipe/rod with the actual measurement part;
F. at the other end of addition type ferromagnetism pipe/rod; Test this addition type ferromagnetism pipe/rod with a test magnetic field intensity device identical and have the magnetic field intensity of the position of an identical distance of measured length really, thereby obtain in the addition type ferromagnetism pipe/rod data corresponding to the magnetic field intensity of the position of said definite length distance with said step b apart from the end face of this other end with said step B;
G. by computer processing system the data of addition type ferromagnetism pipe/excellent magnetic field intensity that step F obtained are brought in the relation curve that step D obtained, thereby obtain the corresponding total length of addition type ferromagnetism pipe/rod and the ferromagnetism pipe/rod of surveying part;
The length of H. testing the revealed section of the ferromagnetism pipe/excellent magnetic field intensity of surveying part with existing conventional measuring method or lossless detection method; The length dimension that the length dimension that step G is obtained deducts revealed section deducts the length dimension of addition type ferromagnetism pipe/rod again, thereby obtains the size of length of embedment of the ferromagnetism pipe/rod of actual measurement part.
The detection method of a kind of ferromagnetism pipe of the present invention/excellent length of embedment; Be first demarcation, survey the back, obtains the size of ferromagnetism pipe/excellent length of embedment; At timing signal; Be to be used as calibration element, respectively the ferromagnetism pipe/rod of these different lengths magnetized with same block of magnet then, after each ferromagnetism pipe/rod magnetization with many ferromagnetism pipe/rods with different length; With the magnetic field intensity that same test magnetic field intensity device is tested a certain position of each ferromagnetism pipe/rod, each demarcates with the test position of ferromagnetism pipe/rod is identical apart from the length dimension of an end end face of its magnet that reclines.The present invention is based on such principle: in the magnetized ferromagnetism pipe/rod of a velamen, the two ends of its ferromagnetism pipe/rod are respectively the N utmost point and the S utmost point, and the magnetic at two ends is the strongest; That is to say that magnetic field intensity is the strongest, at the intermediate point of ferromagnetism pipe/rod, can regard as magnetic a little less than; Being equivalent to magnetic field intensity is zero, like this, and in the ferromagnetism pipe/rod of different length; Magnetic field intensity in the position identical apart from the one end-face distance is also inequality, and, be to become corresponding relation with the length of ferromagnetism pipe/rod; Therefore; Can obtain confirming described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod the corresponding relation curve of magnetic field intensity of the position of length distance through demarcation, and in actual measurement, as long as record the magnetic field intensity of same distance position; Just can obtain the total length of the ferromagnetism pipe/rod of this actual measurement part, and and then obtain the size of the ferromagnetism pipe/excellent length of embedment of this actual measurement part.
Because; The protruded length of the ferromagnetism pipe/rod of actual measurement part might be too short; That is, the protruded length of the ferromagnetism pipe/rod of actual measurement part less than timing signal the size of definite length distance, therefore; Another kind of solution is that the exposed junction at the ferromagnetism pipe/rod of actual measurement part connects an addition type ferromagnetism pipe/rod; The length of this addition type ferromagnetism pipe/rod be greater than timing signal the size of definite length distance, like this, just can through in test addition type ferromagnetism pipe/rod in the magnetic field intensity of same distance position; Obtain the total length of ferromagnetism pipe/rod of addition type ferromagnetism pipe/rod and actual measurement part, and and then obtain the size of the ferromagnetism pipe/excellent length of embedment of this actual measurement part.
The invention has the beneficial effects as follows; Owing to adopted many ferromagnetism pipe/rods to be used as calibration element with different length; Respectively the ferromagnetism pipe/rod of these different lengths is magnetized with same block of magnet then; After each ferromagnetism pipe/rod magnetization; With the magnetic field intensity that same test magnetic field intensity device is tested a certain position of each ferromagnetism pipe/rod, each demarcates with the test position of ferromagnetism pipe/rod is identical apart from the length dimension of an end end face of its magnet that reclines, thereby demarcates the corresponding relation curve of magnetic field intensity of the position of definite length distance described in the length that obtains a ferromagnetism pipe/rod and the ferromagnetism pipe/rod; Then in actual measurement; As long as record the magnetic field intensity of same distance position, just can obtain the total length of the ferromagnetism pipe/rod of this actual measurement part, and and then obtain the size of the ferromagnetism pipe/excellent length of embedment of this actual measurement part.Owing to also adopted addition type ferromagnetism pipe/rod, can be implemented in the actual measurement part ferromagnetism pipe/rod revealed section too in short-term, still can adopt method of the present invention to realize testing.Have characteristics easy to detect, that estimate reliably, be convenient to realize.
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain; But the detection method of a kind of ferromagnetism pipe of the present invention/excellent length of embedment is not limited to embodiment.
Description of drawings
Fig. 1 is the synoptic diagram that embodiment one realizes the inventive method actual measurement process;
Fig. 2 is the synoptic diagram that embodiment two realizes the inventive method actual measurement process.
Embodiment
Embodiment one, and referring to shown in Figure 1, the detection method of a kind of ferromagnetism pipe of the present invention/excellent length of embedment comprises and demarcates and survey two processes:
In calibration process, comprise the steps:
A. the end face at an end of the demarcation ferromagnetism pipe/rod of a known certain-length pastes the magnet of putting a standard sample, utilizes the magnet of this standard sample to let demarcation ferromagnetism pipe/rod of this known certain-length magnetize;
B. at the end near magnet of the demarcation ferromagnetism pipe/rod of this known certain-length; Have the magnetic field intensity of the position of a definite length distance with test magnetic field intensity device to test this demarcations ferromagnetism pipe/end face of excellent middle distance this end, thereby the known length that obtains one group of demarcation ferromagnetism pipe/rod becomes the data of corresponding relation with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod;
C. constantly change the known length of demarcating ferromagnetism pipe/rod and adopt the identical distance of measured length really; Repeating step A and step B, thus some groups of different known length of demarcating ferromagnetism pipe/rods become one-to-one relationship with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod data obtained;
D. said some groups of data processing are become the corresponding relation curve of magnetic field intensity of confirming the position of length distance described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod by computer processing system, and the data of this relation curve are kept in the computer processing system;
In the actual measurement process, comprise the steps:
E. the end face at the end 11 that exposes of the ferromagnetism pipe/rod 1 (end of this ferromagnetism pipe/rod is imbedded in cement or the mortar medium 20) of actual measurement part pastes the magnet 2 put a standard sample identical with said step a, utilizes the magnet 2 of this standard sample to let the ferromagnetism pipe/rod 1 of surveying part magnetize;
F. at the end 11 that exposes of ferromagnetism pipe/rod 1 of actual measurement part; Ferromagnetism pipe/rod of testing this actual measurement part with a test magnetic field intensity device identical with said step b has the magnetic field intensity of the position 12 of an identical distance of measured length really with said step b apart from the end face of this end, thereby obtains in the ferromagnetism pipe/rod 1 of an actual measurement part data corresponding to the magnetic field intensity of the position 12 of said definite length distance;
The data of the ferromagnetism pipe/excellent magnetic field intensity of the actual measurement part that g. step f is obtained by computer processing system are brought in the relation curve that steps d obtains, thereby obtain the corresponding length of the ferromagnetism pipe/rod 1 of actual measurement part;
The length of h. testing the revealed section 11 of the ferromagnetism pipe/excellent magnetic field intensity of surveying part with existing conventional measuring method or lossless detection method; The length dimension that step g obtained is deducted the length dimension of revealed section 11, thereby obtain the size of length of embedment (being buried section 13) of the ferromagnetism pipe/rod 1 of actual measurement part.
Embodiment two, and referring to shown in Figure 2, the detection method of a kind of ferromagnetism pipe of the present invention/excellent length of embedment comprises and demarcates and survey two processes:
In calibration process, comprise the steps:
A. the end face at an end of the demarcation ferromagnetism pipe/rod of a known certain-length pastes the magnet of putting a standard sample, utilizes the magnet of this standard sample to let demarcation ferromagnetism pipe/rod of this known certain-length magnetize;
B. at the end near magnet of the demarcation ferromagnetism pipe/rod of this known certain-length; Have the magnetic field intensity of the position of a definite length distance with test magnetic field intensity device to test this demarcations ferromagnetism pipe/end face of excellent middle distance this end, thereby the known length that obtains one group of demarcation ferromagnetism pipe/rod becomes the data of corresponding relation with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod;
C. constantly change the known length of demarcating ferromagnetism pipe/rod and adopt the identical distance of measured length really; Repeating step A and step B, thus some groups of different known length of demarcating ferromagnetism pipe/rods become one-to-one relationship with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod data obtained;
D. said some groups of data processing are become the corresponding relation curve of magnetic field intensity of confirming the position of length distance described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod by computer processing system, and the data of this relation curve are kept in the computer processing system;
In the actual measurement process, comprise the steps:
E. with one confirm in advance good size and with the ferromagnetism pipe/rod of actual measurement part have identical material addition type ferromagnetism pipe/rod 3 one terminate at the ferromagnetism pipe/rod 1 (end of this ferromagnetism pipe/rod is imbedded in cement or the mortar medium 20) of actual measurement part an end 11 that exposes, and the end face of addition type ferromagnetism pipe/rod 3 and survey smooth joining of end face of the ferromagnetism pipe/rod 1 of part; The other end at addition type ferromagnetism pipe/rod 3 pastes the magnet 2 of putting a standard sample identical with said steps A, utilizes the magnet 2 of this standard sample to let the addition type ferromagnetism pipe/rod 3 and the ferromagnetism pipe/rod 1 of actual measurement part magnetize simultaneously;
F. at the other end of addition type ferromagnetism pipe/rod 3; Test this addition type ferromagnetism pipe/rod with a test magnetic field intensity device identical and have the magnetic field intensity of the position 31 of an identical distance of measured length really, thereby obtain in the addition type ferromagnetism pipe/rod data corresponding to the magnetic field intensity of the position 31 of said definite length distance with said step b apart from the end face of this other end with said step B;
G. by computer processing system the data of addition type ferromagnetism pipe/excellent 3 magnetic field intensitys that step F obtained are brought in the relation curve that step D obtained, thereby obtain the corresponding total length of addition type ferromagnetism pipe/rod 3 and the ferromagnetism pipe/rod 1 of surveying part;
The length of H. testing the revealed section 11 of the ferromagnetism pipe/excellent magnetic field intensity of surveying part with existing conventional measuring method or lossless detection method; The length dimension that the length dimension that step G is obtained deducts revealed section 11 deducts the length dimension of addition type ferromagnetism pipe/rod 3 again, thereby obtains the size of length of embedment (being buried section 13) of the ferromagnetism pipe/rod 1 of actual measurement part.
The detection method of a kind of ferromagnetism pipe of the present invention/excellent length of embedment; Be first demarcation, survey the back, obtains the size of ferromagnetism pipe/excellent length of embedment; At timing signal; Be to be used as calibration element, respectively the ferromagnetism pipe/rod of these different lengths magnetized with same block of magnet then, after each ferromagnetism pipe/rod magnetization with many ferromagnetism pipe/rods with different length; With the magnetic field intensity that same test magnetic field intensity device is tested a certain position of each ferromagnetism pipe/rod, each demarcates with the test position of ferromagnetism pipe/rod is identical apart from the length dimension of an end end face of its magnet that reclines.The present invention is based on such principle: in the magnetized ferromagnetism pipe/rod of a velamen, the two ends of its ferromagnetism pipe/rod are respectively the N utmost point and the S utmost point, and the magnetic at two ends is the strongest; That is to say that magnetic field intensity is the strongest, at the intermediate point of ferromagnetism pipe/rod, can regard as magnetic a little less than; Being equivalent to magnetic field intensity is zero, like this, and in the ferromagnetism pipe/rod of different length; Magnetic field intensity in the position identical apart from the one end-face distance is also inequality, and, be to become corresponding relation with the length of ferromagnetism pipe/rod; Therefore; Can obtain confirming described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod the corresponding relation curve of magnetic field intensity of the position of length distance through demarcation, and in actual measurement, as long as record the magnetic field intensity of same distance position; Just can obtain the total length of the ferromagnetism pipe/rod of this actual measurement part, and and then obtain the size of the ferromagnetism pipe/excellent length of embedment of this actual measurement part.
Because; The protruded length of the ferromagnetism pipe/rod of actual measurement part might be too short; That is, the protruded length of the ferromagnetism pipe/rod of actual measurement part less than timing signal the size of definite length distance, therefore; Another kind of solution is that the exposed junction at the ferromagnetism pipe/rod of actual measurement part connects an addition type ferromagnetism pipe/rod; The length of this addition type ferromagnetism pipe/rod be greater than timing signal the size of definite length distance, like this, just can through in test addition type ferromagnetism pipe/rod in the magnetic field intensity of same distance position; Obtain the total length of ferromagnetism pipe/rod of addition type ferromagnetism pipe/rod and actual measurement part, and and then obtain the size of the ferromagnetism pipe/excellent length of embedment of this actual measurement part.
The foregoing description only is used for further specifying the detection method of a kind of ferromagnetism pipe of the present invention/excellent length of embedment; But the present invention is not limited to embodiment; Every foundation technical spirit of the present invention all falls in the protection domain of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1. the detection method of ferromagnetism pipe/excellent length of embedment is characterized in that: comprise and demarcate and survey two processes:
In calibration process, comprise the steps:
A. the end face at an end of the demarcation ferromagnetism pipe/rod of a known certain-length pastes the magnet of putting a standard sample, utilizes the magnet of this standard sample to let demarcation ferromagnetism pipe/rod of this known certain-length magnetize;
B. at the end near magnet of the demarcation ferromagnetism pipe/rod of this known certain-length; Have the magnetic field intensity of the position of a definite length distance with test magnetic field intensity device to test this demarcations ferromagnetism pipe/end face of excellent middle distance this end, thereby the known length that obtains one group of demarcation ferromagnetism pipe/rod becomes the data of corresponding relation with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod;
C. constantly change the known length of demarcating ferromagnetism pipe/rod and adopt the identical distance of measured length really; Repeating step a and step b, thus some groups of different known length of demarcating ferromagnetism pipe/rods become one-to-one relationship with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod data obtained;
D. become the data processing of one-to-one relationship to become the corresponding relation curve of magnetic field intensity of the position of definite length distance described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod with the magnetic field intensity of demarcating the position of definite length distance described in ferromagnetism pipe/rod said some groups different known length of demarcating ferromagnetism pipe/rods by computer processing system, and the data of this relation curve are kept in the computer processing system;
In the actual measurement process, comprise the steps:
E. the end face at the end that exposes of the ferromagnetism pipe/rod of actual measurement part pastes the magnet put a standard sample identical with said step a, utilizes the magnet of this standard sample to let the ferromagnetism pipe/rod of surveying part magnetize;
F. at the end that exposes of ferromagnetism pipe/rod of actual measurement part; Ferromagnetism pipe/rod of testing this actual measurement part with a test magnetic field intensity device identical with said step b has the magnetic field intensity of the position of an identical distance of measured length really with said step b apart from the end face of this end, thereby obtains in the ferromagnetism pipe/rod of an actual measurement part data corresponding to the magnetic field intensity of the position of said definite length distance;
The data of the ferromagnetism pipe/excellent magnetic field intensity of the actual measurement part that g. step f is obtained by computer processing system are brought in the relation curve that steps d obtains, thereby obtain the corresponding length of the ferromagnetism pipe/rod of actual measurement part;
The length of h. testing the revealed section of the ferromagnetism pipe/excellent magnetic field intensity of surveying part with existing conventional measuring method or lossless detection method; The length dimension that step g obtained is deducted the length dimension of revealed section, thereby obtain the size of length of embedment of the ferromagnetism pipe/rod of actual measurement part.
2. the detection method of ferromagnetism pipe/excellent length of embedment is characterized in that: comprise and demarcate and survey two processes:
In calibration process, comprise the steps:
A. the end face at an end of the demarcation ferromagnetism pipe/rod of a known certain-length pastes the magnet of putting a standard sample, utilizes the magnet of this standard sample to let demarcation ferromagnetism pipe/rod of this known certain-length magnetize;
B. at the end near magnet of the demarcation ferromagnetism pipe/rod of this known certain-length; Have the magnetic field intensity of the position of a definite length distance with test magnetic field intensity device to test this demarcations ferromagnetism pipe/end face of excellent middle distance this end, thereby the known length that obtains one group of demarcation ferromagnetism pipe/rod becomes the data of corresponding relation with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod;
C. constantly change the known length of demarcating ferromagnetism pipe/rod and adopt the identical distance of measured length really; Repeating step A and step B, thus some groups of different known length of demarcating ferromagnetism pipe/rods become one-to-one relationship with the magnetic field intensity of the position of definite length distance described in demarcation ferromagnetism pipe/rod data obtained;
D. become the data processing of one-to-one relationship to become the corresponding relation curve of magnetic field intensity of the position of definite length distance described in length and the ferromagnetism pipe/rod of a ferromagnetism pipe/rod with the magnetic field intensity of demarcating the position of definite length distance described in ferromagnetism pipe/rod said some groups different known length of demarcating ferromagnetism pipe/rods by computer processing system, and the data of this relation curve are kept in the computer processing system;
In the actual measurement process, comprise the steps:
E. with one confirm in advance good size and with the ferromagnetism pipe/rod of actual measurement part have identical material addition type ferromagnetism pipe/rod one terminate at the ferromagnetism pipe/rod of actual measurement part an end that exposes, and the end face of addition type ferromagnetism pipe/rod and survey smooth joining of end face of the ferromagnetism pipe/rod of part; The other end at addition type ferromagnetism pipe/rod pastes the magnet of putting a standard sample identical with said steps A, utilizes the magnet of this standard sample to magnetize simultaneously by the ferromagnetism pipe/rod of addition type ferromagnetism pipe/rod with the actual measurement part;
F. at the other end of addition type ferromagnetism pipe/rod; Test this addition type ferromagnetism pipe/rod with a test magnetic field intensity device identical and have the magnetic field intensity of the position of an identical distance of measured length really, thereby obtain in the addition type ferromagnetism pipe/rod data corresponding to the magnetic field intensity of the position of said definite length distance with said step B apart from the end face of this other end with said step B;
G. by computer processing system the data of addition type ferromagnetism pipe/excellent magnetic field intensity that step F obtained are brought in the relation curve that step D obtained, thereby obtain the corresponding total length of addition type ferromagnetism pipe/rod and the ferromagnetism pipe/rod of surveying part;
The length of H. testing the revealed section of the ferromagnetism pipe/excellent magnetic field intensity of surveying part with existing conventional measuring method or lossless detection method; The length dimension that the length dimension that step G is obtained deducts revealed section deducts the length dimension of addition type ferromagnetism pipe/rod again, thereby obtains the size of length of embedment of the ferromagnetism pipe/rod of actual measurement part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106001048A CN102168943B (en) | 2010-12-21 | 2010-12-21 | Method for detecting embedment depth of ferromagnetic tubes/rods |
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| CN2010106001048A CN102168943B (en) | 2010-12-21 | 2010-12-21 | Method for detecting embedment depth of ferromagnetic tubes/rods |
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| CN102168943B true CN102168943B (en) | 2012-07-18 |
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| DE3535117C1 (en) * | 1985-10-02 | 1986-12-18 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Method and device for measuring ferromagnetic objects laid in non-magnetic materials |
| JPH04328411A (en) * | 1991-04-30 | 1992-11-17 | Furukawa Electric Co Ltd:The | Method for measuring buried depth of long body buried in water bottom |
| CN100519959C (en) * | 2006-03-10 | 2009-07-29 | 南京大学 | Method for detecting reinforcing bar cage length of concrete pouring pile by electric logging method |
| CN201141763Y (en) * | 2007-11-27 | 2008-10-29 | 西安理工大学 | Detection sensor for anchorage quality of anchor bar |
| CN101545755A (en) * | 2009-04-30 | 2009-09-30 | 浙江大学 | Ferromagnet magnetostrictive effect-based method for testing length of anchor rod |
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2010
- 2010-12-21 CN CN2010106001048A patent/CN102168943B/en not_active Expired - Fee Related
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