CN103217359A - Torsional mode magnetostrictive sensor used for minor-diameter metal bar - Google Patents
Torsional mode magnetostrictive sensor used for minor-diameter metal bar Download PDFInfo
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- CN103217359A CN103217359A CN2013101102667A CN201310110266A CN103217359A CN 103217359 A CN103217359 A CN 103217359A CN 2013101102667 A CN2013101102667 A CN 2013101102667A CN 201310110266 A CN201310110266 A CN 201310110266A CN 103217359 A CN103217359 A CN 103217359A
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- metallic rod
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- ferrocobalt
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- paster
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Abstract
The invention discloses a torsional mode magnetostrictive sensor used for a minor-diameter metal bar and belongs to the technical field of electromagnetic acoustic sensors. The sensor comprises a ferrocobalt patch, a support sleeve, an inductive coil, a protective shell and a bayonet nut connector (BNC) interface. The ferrocobalt patch which is magnetized by a bias magnetic field is curled and sticked on the surface of the minor-diameter metal bar; and the clearance fit is kept between the minor-diameter metal bar and the support sleeve and the minor-diameter metal bar is inserted into the support sleeve to facilitate dismounting and mounting. An inductive coil is wound around the support sleeve. The support sleeve is embedded in the protective shell and is installed at the end part of the metal bar with the protective shell. The BNC interface which is fixedly arranged on the protective shell is connected with output and input ports of the inductive coil. The sensor disclosed by the invention can realize the stimulation and the reception of torsional mode ultrasonic guide waves in the minor-diameter metal straight bar and is used for the measurement of liquid viscosity coefficients.
Description
Technical field:
Be used for the torsion mode magneto strictive sensor of minor diameter Metallic rod, belong to the electromagnetic acoustic sensor technical field.
Background technology:
Present torsion mode supersonic guide-wave magneto strictive sensor is applied to mainly carry out length and defects detection on some large scale structures such as pipeline, cable wire mostly, but all be difficult to diameter less than the Metallic rod of 10mm in excitation torsion mode supersonic guide-wave.The material of minor diameter Metallic rod also is not quite similar, for example iron, copper, aluminium, nickel and all kinds of alloy materials or the like.Therefore, need a kind of simple for structure, dismounting of development magneto strictive sensor easily, be used at minor diameter Metallic rod excitation torsion mode supersonic guide-wave.
Summary of the invention:
The present invention seeks to realize the excitation of torsion mode supersonic guide-wave in the minor diameter Metallic rod, and realize the measurement of coefficient of viscosity based on the attenuation characteristic of torsion mode supersonic guide-wave in liquid.Simultaneously, this sensor can be easily installed on the minor diameter Metallic rod and remove from it.
For achieving the above object, the present invention takes following technical scheme:
Is that the ferrocobalt paster of d is according to M=L/d with length for the L width, the span of M is that 2～10 proportionate relationship self back of curling is pasted on minor diameter Metallic rod surface by epoxide-resin glue, the span of the quantity N of ferrocobalt paster is 1～50, and N the gapless Metallic rod that is arranged in of ferrocobalt paster is axial; Inductive coil is wound on the stop sleeve; The minor diameter Metallic rod interpolation of posting the ferrocobalt paster insert stop sleeve and and stop sleeve between keep clearance fit relationship.Bnc interface is fixedly installed on the protecting sheathing and with the inductive coil input/output port and links to each other, and encourages received signal with this.
The present invention adopts above technical scheme, makes this sensor can be implemented in the torsion mode supersonic guide-wave excitation in the minor diameter Metallic rod, and simple for structure, is easy to dismounting, and the coefficient of viscosity that can be used for different liquids is measured.
Description of drawings:
Fig. 1 inner structure sectional view of the present invention;
The arrange synoptic diagram of Fig. 2 ferrocobalt paster of the present invention on the minor diameter Metallic rod;
Fig. 3 one-piece construction synoptic diagram of the present invention;
Detection signal waveform in Fig. 4 minor diameter Metallic rod;
Among the figure: 1, minor diameter Metallic rod, 2, the ferrocobalt paster, 3, stop sleeve, 4, inductive coil, 5, protecting sheathing, 6, bnc interface.
Embodiment:
As shown in Figure 1, the torsion mode magneto strictive sensor inner structure that is used for the minor diameter Metallic rod is made up of ferrocobalt paster 2, stop sleeve 3 and inductive coil 4 three parts.Filling epoxy resin glue is to paste between process magnetized ferrocobalt paster 2 of bias magnetic field and minor diameter Metallic rod 1 surface.Inductive coil 4 is wound on the stop sleeve 3; Be inserted in the minor diameter Metallic rod 1 in the stop sleeve 3, and keep clearance fit relationship with stop sleeve 3.
Figure 2 shows that ferrocobalt paster 2 is the synoptic diagram of arranging on the minor diameter Metallic rod 1 of D at diameter, ferrocobalt paster 2 need carry out prebuckling and handle, to form flexible ring texture before the surface that is pasted on minor diameter Metallic rod 1.The length L of single hop ferrocobalt paster 2 equals the perimeter L=π * D of minor diameter Metallic rod 1; The ratio of the length L of ferrocobalt paster 2 and width d is M=L/d, and the span of M is 2～10; It is axial that N ferrocobalt paster 2 no gaps of general employing are arranged in minor diameter Metallic rod 1, and the span of quantity N is 1～50.
Figure 3 shows that one-piece construction scheme of installation of the present invention; the external structure of sensor comprises protecting sheathing 5 and bnc interface 6 two parts; wherein protecting sheathing 5 is used to protect the sensor internal structure, and bnc interface 6 is used for being connected with the inductive coil input/output port, realizes the signal transmission.
Provide an example in conjunction with content of the present invention.
Fig. 4 is T (0,1) the mode ultrasonic guided wave signals waveform that utilizes the present invention to receive in the minor diameter steel pole of long 600mm, diameter 4mm.The sensor excitation frequency is 128kHz, according to end face echo T1 for the first time and the propagation distance difference △ l of end face echo T2 and the T (0 that propagation time difference △ t calculates for the second time, 1) the mode velocity of propagation is about 3255m/s, T (0 with Theoretical Calculation, 1) mode group velocity value Vg=3260m/s is approaching, proves that the present invention can encourage the torsion mode supersonic guide-wave in the minor diameter steel pole.
Claims (4)
1. be used for the torsion mode magneto strictive sensor of minor diameter Metallic rod, comprise ferrocobalt paster, stop sleeve, inductive coil, protecting sheathing and bnc interface.Ferrocobalt paster after the bias magnetic field magnetization curls and is pasted on minor diameter Metallic rod surface; Keep clearance fit relationship between minor diameter Metallic rod and stop sleeve, and in be inserted in the stop sleeve, be convenient to dismounting; Inductive coil is wound on the stop sleeve; Stop sleeve is embedded in protecting sheathing, and is installed on metal rod ends with protecting sheathing, and the bnc interface that is fixedly installed on the protecting sheathing is connected with the inductive coil input/output port.
2. the torsion mode magneto strictive sensor that is used for the minor diameter Metallic rod according to claim 1 is characterized in that described cobalt-base alloy paster is a rectangle, is pasted on minor diameter Metallic rod surface by epoxide-resin glue.
3. the torsion mode magneto strictive sensor that is used for the minor diameter Metallic rod according to claim 1, the diameter that it is characterized in that described minor diameter Metallic rod is the girth that the length L of D, ferrocobalt paster equals the metal straight-bar, and promptly the L=metal is directly counted the girth of straight-bar; The ratio of the length L of ferrocobalt paster and width d is M=L/d, and the span of M is 2～10.The diameter D scope of minor diameter Metallic rod is 1～10mm.
4. the torsion mode magneto strictive sensor that is used for the minor diameter Metallic rod according to claim 1, the span that it is characterized in that the quantity N of ferrocobalt paster is 1～50, N the gapless Metallic rod that is arranged in of ferrocobalt paster is axial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110266.7A CN103217359B (en) | 2013-04-01 | 2013-04-01 | Torsional mode magnetostrictive sensor used for minor-diameter metal bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110266.7A CN103217359B (en) | 2013-04-01 | 2013-04-01 | Torsional mode magnetostrictive sensor used for minor-diameter metal bar |
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| Publication Number | Publication Date |
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| CN103217359A true CN103217359A (en) | 2013-07-24 |
| CN103217359B CN103217359B (en) | 2015-06-03 |
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| CN201310110266.7A Active CN103217359B (en) | 2013-04-01 | 2013-04-01 | Torsional mode magnetostrictive sensor used for minor-diameter metal bar |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502443A (en) * | 2014-12-12 | 2015-04-08 | 北京工业大学 | Circular-array-type magnetostriction sensor based on orthogonal encircling coil |
| CN105842333A (en) * | 2015-01-12 | 2016-08-10 | 宝山钢铁股份有限公司 | Nondestructive testing method for pipeline in complicated equipment |
| CN107422027A (en) * | 2017-09-05 | 2017-12-01 | 北京工业大学 | Torsion mode guided wave magneto strictive sensor based on dual ring permanent volume array |
| CN109870389A (en) * | 2019-04-12 | 2019-06-11 | 长春工程学院 | Based on magnetostrictive displacement sensor irrigation water coefficient of viscosity detection device and method |
| CN115469022A (en) * | 2022-10-18 | 2022-12-13 | 哈尔滨工业大学 | Unidirectional torsion guided wave single-channel magnetostrictive transducer and using method |
Citations (2)
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| CN202562456U (en) * | 2012-05-10 | 2012-11-28 | 北京工业大学 | Dry-coupling torsional-mode magnetostrictive transducer |
| CN102854090A (en) * | 2012-07-18 | 2013-01-02 | 北京工业大学 | Detection device and method of liquid viscosity coefficient based on ultrasonic guided wave |
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2013
- 2013-04-01 CN CN201310110266.7A patent/CN103217359B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562456U (en) * | 2012-05-10 | 2012-11-28 | 北京工业大学 | Dry-coupling torsional-mode magnetostrictive transducer |
| CN102854090A (en) * | 2012-07-18 | 2013-01-02 | 北京工业大学 | Detection device and method of liquid viscosity coefficient based on ultrasonic guided wave |
Non-Patent Citations (2)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502443A (en) * | 2014-12-12 | 2015-04-08 | 北京工业大学 | Circular-array-type magnetostriction sensor based on orthogonal encircling coil |
| CN105842333A (en) * | 2015-01-12 | 2016-08-10 | 宝山钢铁股份有限公司 | Nondestructive testing method for pipeline in complicated equipment |
| CN107422027A (en) * | 2017-09-05 | 2017-12-01 | 北京工业大学 | Torsion mode guided wave magneto strictive sensor based on dual ring permanent volume array |
| CN109870389A (en) * | 2019-04-12 | 2019-06-11 | 长春工程学院 | Based on magnetostrictive displacement sensor irrigation water coefficient of viscosity detection device and method |
| CN115469022A (en) * | 2022-10-18 | 2022-12-13 | 哈尔滨工业大学 | Unidirectional torsion guided wave single-channel magnetostrictive transducer and using method |
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|---|---|
| CN103217359B (en) | 2015-06-03 |
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Effective date of registration: 20170522 Address after: 100022, room 4, building 2605, Wanda Plaza, No. 93, Jianguo Road, Chaoyang, Beijing Patentee after: Beijing Zhong Ying Pangu Intelligent Technology Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology |