CN209911299U - Multipurpose acoustic emission probe - Google Patents
Multipurpose acoustic emission probe Download PDFInfo
- Publication number
- CN209911299U CN209911299U CN201920699806.2U CN201920699806U CN209911299U CN 209911299 U CN209911299 U CN 209911299U CN 201920699806 U CN201920699806 U CN 201920699806U CN 209911299 U CN209911299 U CN 209911299U
- Authority
- CN
- China
- Prior art keywords
- acoustic emission
- probe
- protective cap
- probes
- sensor chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a multi-purpose acoustic emission probe, belonging to the technical field of measuring instruments, comprising a protective shell system consisting of a protective cap and a back plate, a multi-radian probe connecting system consisting of a plurality of probes, and an acoustic emission sensing system consisting of an acoustic emission sensor chip and a wire; the rear part of the protective cap is provided with a cavity for containing the acoustic emission sensor chip, and the rear end of the protective cap is hermetically connected with the rear plate; one end of the wire is connected with the acoustic emission sensor chip, and the other end of the wire penetrates through the rear plate and is electrically connected with an external information acquisition system; the probes are connected with the protective caps, the front arc surfaces of the probes are matched with the surface of the rock sample, and the front arc surfaces of the probes have different curvatures. The acoustic emission sensor chip is sealed in the cavity of protective cap, possesses resistance to compression safeguard function, selects suitable probe from a plurality of probes simultaneously, comes the rock sample detection that adapts to different cambered surfaces, makes the experiment more convenient and fast, has saved a large amount of material costs and time cost.
Description
Technical Field
The utility model belongs to the technical field of measuring instrument, especially, relate to a multi-purpose acoustic emission probe.
Background
The rock is an important engineering material, and has very important significance in researching the mechanical property and the damage evolution rule of the rock. Geotechnical engineering, as a subject based on tests, requires a large number of rock mechanics experiments. In order to reveal the damage evolution mechanism of the rock, acoustic emission testing technology is introduced into indoor rock mechanical tests. In the damage and fracture process of the rock material, the energy stored inside the rock material can be released in the form of acoustic emission, the acoustic emission energy characteristic in the rock bearing and fracture process can be monitored, and the crack initiation, expansion and evolution process in the rock body can be deeply researched; in addition, the space-time evolution rule of the cracks in the rock mass fracturing process is revealed, and theoretical guidance can be provided for the exploitation of unconventional gases such as shale gas and compact sandstone gas.
At present, the problem of poor adaptability exists in the rock indoor acoustic emission test, and the rock indoor acoustic emission test cannot be suitable for rock sample detection under various test purposes and test conditions; in addition, in the rock triaxial mechanical test, the existing sensor needs to be in direct contact with a rock sample, so that the sensor needs to bear certain external force, and the existing acoustic emission sensor has poor compression resistance and protection capability, so that the sensor can be damaged in the using process, and great waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multi-purpose acoustic emission probe aims at solving among the above-mentioned prior art acoustic emission sensor's resistance to compression protective capability poor, the poor technical problem of adaptability.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
a multi-purpose acoustic emission probe comprises a protective shell system, a multi-radian probe connecting system and an acoustic emission sensing system,
the protective shell system comprises a protective cap with rigidity and a rear plate, the rear end of the protective cap is hermetically connected with the rear plate, an open cavity is formed in the rear part of the protective cap, a hollow cavity is formed between the rear part of the protective cap and the rear plate, and the front end of the protective cap is connected with the multi-radian probe connecting system;
the multi-radian probe connecting system comprises a plurality of probes for adhering to the surface of a columnar rock sample, the rear parts of the probes are connected with the front ends of the protective caps, the front parts of the probes are provided with cambered surfaces which are inosculated with the surface of the rock sample, and the front cambered surfaces of the probes are different in curvature; the probe is connected with the protective cap through a connecting piece;
the acoustic emission sensing system comprises an acoustic emission sensor chip and a wire, the acoustic emission sensor chip is arranged in a rear cavity of the protective cap, one end of the wire is connected with the acoustic emission sensor chip, and the other end of the wire penetrates through the rear plate and is electrically connected with an external information acquisition system.
Preferably, the bottom of the open cavity at the rear part of the protective cap is provided with a groove, the acoustic emission sensor chip is arranged in the groove, the opening side of the groove is provided with a pressing gasket, and the periphery of the pressing gasket is fixed on the edge of the groove through pins.
Preferably, the middle part of the rear plate is provided with a wire connecting hole, a socket is arranged in the wire connecting hole, the inner side of the socket is connected with a wire, and the outer side of the socket is connected with an external information acquisition system through a data line.
Preferably, the outer wall of the protective cap is symmetrically provided with two fixing lugs, the two fixing lugs are connected through a tightening spring, and the tightening spring is used for binding the probe at the front end of the protective cap.
Preferably, a sealing ring is arranged between matching surfaces of the protective cap and the rear plate, and the rear plate is connected with the protective cap through a bolt.
Preferably, the front end of the protective cap is provided with a boss, the rear part of the probe is provided with a through hole matched with the boss, and a rubber ring is arranged between the matching surfaces of the through hole and the boss.
Preferably, the boss is a cuboid, and a cuboid hole matched with the boss is formed in the rear portion of the probe.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the acoustic emission sensor chip is sealed in the cavity formed by the protective cap and the rear plate, so that the acoustic emission sensor chip has a compression-resistant protection function and is prevented from being damaged; meanwhile, a proper probe can be selected from the plurality of probes to adapt to detection of different columnar rock samples, so that the test is more convenient and quicker, and a large amount of material cost and time cost are saved. The utility model discloses do not receive the restriction of experimental purpose and test condition, can adapt to not unidimensional rock sample, different probes and the perfect laminating of column rock sample need not a large amount of different contact radian probes of customization, have reduced extravagant phenomenon.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a protection shell system and a sound emission sensing system in a multi-purpose acoustic emission probe according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the back plate of FIG. 1;
fig. 3 is a schematic structural diagram of a probe according to an embodiment of the present invention;
FIG. 4 is a schematic view of a probe according to another embodiment of the present invention;
in the figure: 1-a protective cap, 2-a rear plate, 3-a sealing ring, 4-a bolt, 5-a rubber ring, 6-an acoustic emission sensor chip, 7-a fixing lug, 8-a connecting hole, 9-a socket device, 10-an arc surface, 11-a through hole, 12-a pressing gasket, 13-a pin and 14-a lead.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The multipurpose acoustic emission probe comprises a protective shell system, a multi-radian probe connecting system and an acoustic emission sensing system, wherein the protective shell system comprises a rigid protective cap 1 and a rear plate 2, the rear end of the protective cap 1 is hermetically connected with the rear plate 2, an open cavity is formed in the rear part of the protective cap 1, the rear part of the protective cap 1 and the rear plate 2 form a hollow cavity, and the front end of the protective cap 1 is connected with the multi-radian probe connecting system; the multi-radian probe connecting system comprises a plurality of probes which are used for being attached to the surface of a rock sample, the rear parts of the probes are connected with the front end of the protective cap 1, the front parts of the probes are provided with cambered surfaces 10 which are inosculated with the surface of the rock sample, and the front cambered surfaces 10 of the probes are different in curvature; the probe is connected with the protective cap 1 through a connecting piece; the acoustic emission sensing system comprises an acoustic emission sensor chip 6 and a lead 14, the acoustic emission sensor chip 6 is arranged in a rear cavity of the protective cap 1, one end of the lead 14 is connected with the acoustic emission sensor chip 6, and the other end of the lead 14 penetrates through the rear plate 2 and is electrically connected with an external information acquisition system. The acoustic emission sensor chip is arranged in a hollow cavity formed by the protective cap and the rear plate, so that the compression-resistant protection effect is achieved; in addition, the camber of the cambered surface 10 on one side of the probe can be set according to test requirements, the probes with a plurality of different cambered surfaces can be manufactured in advance, the rock sample is selected from a columnar rock sample, a suitable probe is selected to realize seamless fitting of the acoustic emission probe and the surface of the columnar rock sample, and the plurality of probes with the cambered surfaces with different curvatures can be matched with columnar rock samples with different diameters, so that the adaptability of the acoustic emission probe is improved.
As a preferable structure, as shown in fig. 1, a groove is formed at the bottom of the open cavity at the rear of the protective cap 1, the acoustic emission sensor chip 6 is disposed in the groove, a pressing pad 12 is disposed at the open side of the groove, and the periphery of the pressing pad 12 is fixed to the edge of the groove through pins 13. The size of the groove is matched with the shape of the acoustic emission sensor chip, and the acoustic emission sensor chip is compressed and fixed in the groove by using the compression gasket, so that the acoustic emission sensor chip is prevented from shifting in the using process.
In a specific embodiment of the present invention, as shown in fig. 1 and 2, the middle portion of the back plate 2 is provided with a wire connecting hole, a socket 9 is provided in the wire connecting hole, the inner side of the socket 9 is connected to a wire 14, and the outer side of the socket 9 is connected to an external information collecting system through a data line. Utilize socket ware and data line to be connected, convenient operation is swift, and the time spent also is convenient for accomodate.
Further optimizing the technical scheme, as shown in fig. 1, the outer wall of the protective cap 1 is symmetrically provided with two fixing lugs 7, the connecting member is a tightening spring, two ends of the tightening spring are respectively connected with the two fixing lugs 7, and the tightening spring is used for binding the probe to the front end of the protective cap 1. In the test process, the tightening spring can be wound on the fixing lug, so that the acoustic emission probe and the columnar rock sample are tightly fixed; after the test is finished or the probe needs to be replaced, the probe can be detached only by loosening the tightening spring.
In order to effectively protect the acoustic emission sensor chip inside the cap, as shown in fig. 1 and 2, a sealing ring 3 is arranged between the matching surfaces of the cap 1 and the back plate 2, so that the acoustic emission sensor chip can play roles of dust prevention, water prevention and moisture prevention; the back plate 2 is connected to the protective cap 1 by means of bolts 4. During processing, four connecting holes 8 are processed in advance at four corners of the rear plate 2, four mounting holes are correspondingly processed on the rear end face of the protective cap, and the bolt 4 penetrates through the connecting holes 8 and is screwed into the mounting holes, so that the front end protective cap 1 is hermetically connected with the rear plate 2.
In order to facilitate the connection between the protective cap and the probe, as shown in fig. 1, 3 and 4, a boss is arranged at the front end of the protective cap 1, a through hole 11 matched with the boss is arranged at the rear part of the probe, and a rubber ring 5 is arranged between the matching surfaces of the through hole 11 and the boss. Set up the slot on the outer wall of boss, the slot is used for placing rubber circle 5, and rubber circle 5's function makes the probe connection of protective housing system and many radians connected system more firm.
In a specific embodiment of the present invention, as shown in fig. 1, 3 and 4, the boss is a cuboid, and the rear portion of the probe is provided with a rectangular hole matched with the boss. The structure is convenient to process and manufacture; meanwhile, the protective cap and the rear plate of the protective shell system are both designed to be cuboid in character and are made of materials with certain rigidity.
The utility model also provides an application method of above-mentioned multi-purpose acoustic emission probe, including following step:
firstly, installing the multipurpose acoustic emission probe:
s1, smearing a couplant in the groove at the rear part of the protective cap 1, and placing the acoustic emission sensor chip 6 into the groove after the couplant is smeared uniformly; covering the acoustic emission sensor chip 6 with a pressing gasket 12, and fixing the pressing gasket 12 on the fixing cap 1 by using a pin 13; connecting a lead 14 connected with the acoustic emission sensor chip 6 with a socket 9 on the rear plate 2, and fixing the rear plate 2 on the protective cap 1 by using a bolt 4;
s2, selecting a probe suitable for the contact surface of the columnar rock sample from the multi-radian probe connecting system, and ensuring seamless fit between the probe and the surface of the columnar rock sample; fixing the probe at the front end of the protective cap 1 and ensuring the stability of the probe and the protective cap;
s3, coating a couplant on the arc surface 10 of the probe, then tightly attaching the arc surface 10 to the surface of the columnar rock sample, winding the tightening spring on the fixing lug 7, and tightly fixing the acoustic emission probe and the columnar rock sample by using the tightening spring; then, connecting the data line to the outside of the socket 9, and finishing the installation of the acoustic emission probe;
secondly, before the acoustic emission probe is used, detecting the acoustic emission probe by using a lead breaking test, wherein the lead breaking test is operated as follows:
fixing an acoustic emission probe at an experimental design position of a columnar rock sample, connecting a data line connected with the acoustic emission probe with an information acquisition system of an acoustic emission testing device, starting the information acquisition system, breaking a pencil lead with phi 0.5mm at a certain position of the columnar rock sample, comparing the distance between a monitoring coordinate of the acoustic emission testing device and a real test coordinate, if the distance between the position of the columnar rock sample and the real test coordinate is larger, properly adjusting parameters such as a preset wave speed, an event locking value, an over-defined value and the like, and performing a lead breaking test again until the precision meets the test requirement.
With the utility model discloses acoustic emission test equipment's that forms a complete set use theory of operation as follows: the columnar rock sample is used as an acoustic emission source, the acoustic emission sensor chip receives and collects acoustic signals, namely acoustic emission signals, from the columnar rock sample, the acoustic emission signals are amplified by the preamplifier, the acoustic emission signals are processed by the signal collection system, and the recording, analyzing and displaying are carried out by the recording and displaying system, so that the purpose of detecting the acoustic emission source is finally achieved.
The acoustic emission probe provided by the utility model has compact structure and small size, can meet the requirements of rock triaxial indoor tests, and has the compression-resistant protection function, thereby effectively protecting the acoustic emission sensor chip; meanwhile, the sensor probes with different contact surfaces are convenient to replace, one acoustic emission probe can be suitable for columnar rock samples with different sizes, the probe is tightly attached to the rock samples, the test is more convenient and rapid, and a large amount of material cost and time cost are saved.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the one described herein, and those skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed above.
Claims (7)
1. A multi-purpose acoustic emission probe, characterized by: comprises a protective shell system, a multi-radian probe connecting system and an acoustic emission sensing system,
the protective shell system comprises a protective cap with rigidity and a rear plate, the rear end of the protective cap is hermetically connected with the rear plate, an open cavity is formed in the rear part of the protective cap, a hollow cavity is formed between the rear part of the protective cap and the rear plate, and the front end of the protective cap is connected with the multi-radian probe connecting system;
the multi-radian probe connecting system comprises a plurality of probes for adhering to the surface of a columnar rock sample, the rear parts of the probes are connected with the front ends of the protective caps, the front parts of the probes are provided with cambered surfaces which are inosculated with the surface of the rock sample, and the front cambered surfaces of the probes are different in curvature; the probe is connected with the protective cap through a connecting piece;
the acoustic emission sensing system comprises an acoustic emission sensor chip and a wire, the acoustic emission sensor chip is arranged in a rear cavity of the protective cap, one end of the wire is connected with the acoustic emission sensor chip, and the other end of the wire penetrates through the rear plate and is electrically connected with an external information acquisition system.
2. The multi-use acoustic emission probe of claim 1, wherein: the acoustic emission sensor chip is arranged in the groove, a pressing gasket is arranged on the opening side of the groove, and the periphery of the pressing gasket is fixed on the edge of the groove through pins.
3. The multi-use acoustic emission probe of claim 1, wherein: the middle part of back plate is equipped with the wire connecting hole, be equipped with the socket ware in the wire connecting hole, the inboard of socket ware links to each other with the wire, the outside of socket ware passes through the data line and links to each other with external information acquisition system.
4. The multi-use acoustic emission probe of claim 1, wherein: the probe is characterized in that two fixing lugs are symmetrically arranged on the outer wall of the protective cap and connected through a hooping spring, and the hooping spring is used for binding the probe at the front end of the protective cap.
5. The multi-use acoustic emission probe of claim 1, wherein: and a sealing ring is arranged between the matching surfaces of the protective cap and the rear plate, and the rear plate is connected with the protective cap through a bolt.
6. The multi-use acoustic emission probe of any of claims 1-5, wherein: the front end of the protective cap is provided with a boss, the rear portion of the probe is provided with a through hole matched with the boss, and a rubber ring is arranged between the matching surfaces of the through hole and the boss.
7. The multi-use acoustic emission probe of claim 6, wherein: the boss is the cuboid, the rear portion of probe is equipped with the rectangular hole with boss complex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920699806.2U CN209911299U (en) | 2019-05-16 | 2019-05-16 | Multipurpose acoustic emission probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920699806.2U CN209911299U (en) | 2019-05-16 | 2019-05-16 | Multipurpose acoustic emission probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209911299U true CN209911299U (en) | 2020-01-07 |
Family
ID=69048155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920699806.2U Active CN209911299U (en) | 2019-05-16 | 2019-05-16 | Multipurpose acoustic emission probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209911299U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018244A (en) * | 2019-05-16 | 2019-07-16 | 石家庄铁道大学 | Multi-purpose acoustic emission probe and its application method |
-
2019
- 2019-05-16 CN CN201920699806.2U patent/CN209911299U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018244A (en) * | 2019-05-16 | 2019-07-16 | 石家庄铁道大学 | Multi-purpose acoustic emission probe and its application method |
| CN110018244B (en) * | 2019-05-16 | 2024-02-13 | 石家庄铁道大学 | Multipurpose acoustic emission probe and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209911299U (en) | Multipurpose acoustic emission probe | |
| CN110018244B (en) | Multipurpose acoustic emission probe and using method thereof | |
| CN206057262U (en) | A kind of negative-pressure type acoustic emission sensor fixing device | |
| CN109142536A (en) | High-precision rock interior damages real-time locating and detecting device | |
| CN107421677A (en) | A kind of monitoring device and method of shield tunnel track bolt axle power | |
| CN110044709A (en) | A kind of monitoring device for true triaxial test | |
| CN201653446U (en) | Sensor protective cover | |
| CN207964608U (en) | A kind of optoacoustic spectroscopy Trace gas detection instrument carrying case | |
| JP6338760B1 (en) | Peening calibration unit, battery pack and system | |
| CN215953183U (en) | Highway engineering is managed with dust removal function resiliometer | |
| CN207439469U (en) | A kind of set damage corrosion and temperature and pressure comprehensive tester | |
| CN201247102Y (en) | Built-in temperature sensor air chamber | |
| CN210376239U (en) | Curved surface acoustic emission sensor | |
| CN207300315U (en) | A kind of multifunction architecture engineering quality detection device | |
| CN204535849U (en) | The piezoelectric ceramic hydrophone of metal shell sealing | |
| CN110579320A (en) | IP67 anhydrous detection device of waterproof product | |
| CN110687212A (en) | Device and system for detecting dynamic crack development rule of coal rock under external condition | |
| CN215413681U (en) | Hand-held type land area measuring apparatu | |
| CN211014136U (en) | Device and system for detecting dynamic crack development rule of coal rock under external condition | |
| CN209992481U (en) | Portable grain moisture meter | |
| CN206788110U (en) | A kind of plane probe | |
| CN212686303U (en) | Conveying device for nondestructive testing equipment | |
| CN209779720U (en) | Foundation pile dynamic tester adopting touch pen to input FPGA (field programmable Gate array) acquisition control | |
| CN220983205U (en) | Acoustic knocking force hammer | |
| CN209262673U (en) | A kind of liquid oxygen storage tank gas monitoring apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |