Acoustic emission sensor

Abstract

The utility model discloses an acoustic emission sensor which comprises a first ring, a second ring, a mounting seat and a sensor body, the first ring and the second ring are arranged in parallel up and down and are connected through a connecting column, and the mounting seat is slidably mounted on the connecting column. The installation seat is provided with a locking piece used for locking the installation seat on the connecting column, the sensor body is installed on the installation seat in a sliding mode, the detection end of the sensor body faces the center line of the first ring, and an adjusting piece used for adjusting the sensor body is installed on the installation seat. According to the utility model, the sound wave detector can be conveniently and quickly fixed on the concrete test piece, and is convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to measuring the vibration of a solid test piece by directly transmitting the vibration to a detector, in particular to an acoustic emission sensor. Background Art

[0002] As a non-destructive testing method, acoustic emission can be used to monitor crack propagation in real time. When using it, the detector needs to be placed close to the test piece to be tested, and the sound wave vibration in the solid specimen is measured by direct layer transmission.

[0003] At present, the main method of fixing the acoustic wave detector for concrete beams is to stick it with tape or glue. Although these two methods are simple to operate and easy to implement, they also have disadvantages:

[0004] For tape sticking, the rapid expansion of cracks near the tape is likely to cause the tape to break away from the surface of the concrete specimen, resulting in poor contact between the sensor receiving surface and the concrete surface, affecting the detection;

[0005] As for glue sticking, it is troublesome to disassemble and clean the sensor after use. If the cleaning is not thorough, residual glue will adhere to the sensor, causing the glue layer on the surface of the acoustic wave detector to thicken, thereby weakening the signal collection capability.

[0006] Therefore, designing an acoustic wave detector that is convenient for installation and disassembly is one of the problems that need to be solved urgently by those skilled in the art. Utility Model Content

[0007] The utility model aims to provide an acoustic emission sensor to solve the deficiencies in the prior art. The utility model can conveniently and quickly fix the acoustic wave detector to a concrete test piece and is convenient to disassemble.

[0008] The utility model provides an acoustic emission sensor, comprising a first ring, a second ring, a mounting seat and a sensor body, wherein the first ring and the second ring are arranged in parallel up and down and are connected through a connecting column, the mounting seat is slidably mounted on the connecting column, the mounting seat is provided with a locking piece for locking the mounting seat on the connecting column, the sensor body is slidably mounted on the mounting seat, the detection end of the sensor body faces the center line of the first ring, and the mounting seat is provided with an adjusting piece for adjusting the sensor body.

[0009] An acoustic emission sensor as described above, wherein preferably, the mounting seat is slidably sleeved on the connecting column, a mounting tube is fixedly mounted on the mounting seat, one end of the mounting tube is open, the opening of the mounting tube is toward the center line of the first ring, and the sensor body is slidably mounted in the mounting tube; the adjusting member is a screw rod, the screw rod is threadedly connected to the mounting tube, and one end of the screw rod is rotatably connected to the sensor body.

[0010] An acoustic emission sensor as described above, wherein, preferably, a mounting hole is provided on the mounting seat, and the mounting seat is mounted on the connecting column through the mounting hole; an avoidance hole is provided on the side of the connecting column, and the avoidance hole is arranged along the length direction of the connecting column; and the mounting tube passes through the avoidance hole.

[0011] An acoustic emission sensor as described above, wherein, preferably, a first slider is slidably installed in the installation tube, the first slider is located between the sensor body and the screw rod, the first slider is rotationally connected to the screw rod, and the first slider is connected to the sensor body via a spring.

[0012] In the acoustic emission sensor as described above, preferably, a second slider is further provided in the mounting tube, the second slider is located between the sensor body and the spring, the second slider is connected to the sensor body by screws, and the second slider is fixedly connected to the spring.

[0013] In the acoustic emission sensor as described above, preferably, a connecting cap is threadedly mounted on one end of the mounting tube close to the center line of the first ring, and a through hole is formed in the connecting cap for the sensor body to pass through.

[0014] In the acoustic emission sensor as described above, preferably, the locking member is a bolt, the bolt is threadedly connected to the mounting seat, and one end of the bolt can be tightened against the connecting column.

[0015] In the acoustic emission sensor as described above, preferably, there are two bolts, and the two bolts are symmetrically arranged on both sides of the connecting column.

[0016] In the acoustic emission sensor as described above, preferably, a positioning groove is provided on the side surface of the connecting column along the length direction of the connecting column, and the positioning groove is arranged opposite to the bolt.

[0017] In the acoustic emission sensor as described above, preferably, a scale is provided on the connecting column, and the scale is arranged along the length direction of the connecting column.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model can quickly fix the acoustic emission sensor to the concrete specimen to be tested, and is easy to disassemble.

[0020] 2. The utility model can adjust the contact force between the sensor body and the concrete specimen so that the detection end of the sensor body always rests on the specimen, reducing the influence of the contact pressure on the acoustic emission monitoring results during the test process and improving the accuracy and stability of the acoustic emission signal monitored by the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the acoustic emission sensor proposed by the utility model;

[0022] Figure 2 yes Figure 1 The main view;

[0023] Figure 3 yes Figure 1 A top view of

[0024] Figure 4 It is a schematic diagram of the installation structure of the mounting seat, the mounting cylinder, the locking piece, and the adjusting piece;

[0025] Figure 5 yes Figure 4 sectional view of .

[0026] Description of reference numerals:

[0027] 1-first ring, 2-second ring, 3-mounting seat, 4-sensor body, 5-connecting column, 6-locking piece, 7-adjusting piece, 8-mounting cylinder, 31-mounting hole, 51-avoidance hole, 9-first slider, 10-spring, 11-second slider, 12-connecting cap, 121-through hole, 52-positioning groove, 53-scale, 13-first handle, 14-second handle. DETAILED DESCRIPTION

[0028] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] Embodiment 1 of the present utility model:

[0030] like Figure 1-Figure 5As shown, the utility model proposes an acoustic emission sensor, including a first ring 1 and a second ring 2 arranged in parallel up and down, the center line of the first ring 1 coincides with the center line of the second ring 2, and the first ring 1 and the second ring 2 are the same size. The first ring 1 and the second ring 2 are connected by a connecting column 5. As an implementation method, one end of the connecting column 5 is fixedly connected to the first ring 1 by welding, and the other end is fixedly connected to the second ring 2 by welding. There are four connecting columns 5, and the four connecting columns 5 are evenly distributed along the circumferential direction of the first ring 1. The number of connecting columns 5 can be set as needed. A mounting seat 3 is slidably mounted on the connecting column 5, and a locking member 6 for locking the mounting seat 3 on the connecting column 5 is provided on the mounting seat 3. A sensor body 4 is slidably mounted on the mounting seat 3, and the detection end of the sensor body 4 faces the center line of the first ring 1. An adjusting member 7 for adjusting the sensor body 4 is installed on the mounting seat 3.

[0031] When in use, the concrete specimen to be tested is placed in the space surrounded by the first ring 1, the second ring 2 and the connecting column 5, and the height of the mounting seat 3 is adjusted according to the height to be tested. After the height of the mounting seat 3 is adjusted, it is fixed by the locking member 6. Then, a coupling agent (such as vaseline) is applied to the detection end of the sensor body 4. Then, the distance between the sensor body 4 and the concrete specimen is adjusted by the adjusting member 7, so that the detection end of the sensor body 4 is against the surface of the concrete specimen, and the installation of the acoustic wave detector is completed. When disassembly is required, the sensor body 4 only needs to be moved away from the concrete specimen by the adjusting member 7 to detach the sensor body 4 from the concrete specimen. Both the installation and disassembly processes are very convenient.

[0032] As an implementation method, the mounting seat 3 is slidably sleeved on the connecting column 5, and a mounting tube 8 is fixedly installed on the mounting seat 3 by welding. The mounting tube 8 is a cylindrical tube, one end of which is open and the other end is sealed. The opening of the mounting tube 8 faces the center line of the first ring 1, and the sensor body 4 is slidably installed in the mounting tube 8; the adjustment member 7 is a screw rod, which is arranged along the center line direction of the mounting tube 8, and one end of the screw rod is rotatably connected to the sensor body 4. The other end of the screw rod penetrates and extends out of the sealed end of the mounting tube 8, and the screw rod is threadedly connected to the mounting tube 8. In order to facilitate manual rotation of the screw rod, a first handle 13 is fixedly installed at one end of the screw rod away from the sensor body 4.

[0033] As an implementation method, the mounting seat 3 is a rectangular seat, and a mounting hole 31 is provided in the middle of the mounting seat 3. The mounting seat 3 is sleeved on the connecting column 5 through the mounting hole 31 and slides with the connecting column 5; a first hole and a second hole are respectively provided on one opposite side of the mounting seat 3, and the center lines of the first hole and the second hole coincide, and the first hole and the second hole are both connected with the mounting hole 31. The mounting tube 8 passes through the first hole and the second hole, and the mounting tube 8 and the first hole and the second hole are interference fit. Such a design can improve the connection strength between the mounting tube 8 and the mounting seat 3, so that the sensor body 4 can be pushed or pulled to move more smoothly when the screw rotates. An avoidance hole 51 is provided on the side of the connecting column 5, and the avoidance hole 51 is arranged along the length direction of the connecting column 5; the mounting tube 8 passes through the avoidance hole 51. After the mounting tube 8 passes through the first hole and the second hole, it can also be fixedly connected to the mounting seat 3 by welding.

[0034] The locking member 6 is a bolt, which is threadedly connected to the mounting seat 3, and one end of the bolt can be pressed against the connecting column 5. In order to improve the fastness of the locking, two bolts can be provided, and the two bolts are symmetrically arranged on both sides of the connecting column 5. In order to prevent the mounting seat 3 from rotating when moving along the connecting column 5, a positioning groove 52 can be provided on the side of the connecting column 5 along the length direction of the connecting column 5, and the positioning groove 52 is arranged opposite to the bolt, and the end of the bolt is pressed against the bottom of the positioning groove 52, so that the mounting seat 3 is fixed on the connecting column 5. In order to prevent the sensor body 4 from being damaged or dusted when not in use, the sensor body 4 can be stored in the mounting tube 8 when not in use, and then removed from the mounting tube 8 when in use. In order to facilitate manual rotation of the bolt, a second handle 14 can be provided at the end of the bolt away from the connecting column 5, and anti-slip grooves are provided on the second handle 14.

[0035] It should be pointed out that in this embodiment, the acoustic wave detector is an acoustic emission sensor. When in use, the concrete specimen to be detected is placed in the space surrounded by the first ring 1, the second ring 2 and the connecting column 5, and then the two bolts are rotated by the left and right hands at the same time so that the bolts are no longer pressed against the connecting column 5, and then the acoustic emission sensor position is installed according to the needs of the concrete specimen, and the mounting seat 3 is moved upward or downward along the connecting column 5 so that the open end of the mounting tube 8 is directly opposite to the position where the acoustic emission sensor is installed on the concrete specimen, and then the bolts are rotated in the opposite direction by the left and right hands at the same time so that the two bolts are pressed against the bottom of the positioning groove 52 again, and the mounting seat 3 is fixed on the connecting column 5. Then the screw is rotated so that the detection end of the sensor body 4 extends out from the mounting tube 8, and then the coupling agent is applied to the detection end, and then the screw is continued to be rotated until the sensor body 4 is pressed against the surface of the concrete specimen, and the installation and fixation of the acoustic emission sensor is completed. During the installation process, the acoustic emission sensor is pressed against the surface of the concrete specimen, so that the vibration of the sound is directly transmitted to the surface of the acoustic wave detector, and then detected by the acoustic wave detector.

[0036] Embodiment 2 of the present utility model:

[0037] This embodiment is a further improvement on the basis of the first embodiment, and the same parts as the first embodiment are not repeated here, and only the improved points are described.

[0038] See also Figure 5 As shown, a first slider 9 is slidably installed in the installation cylinder 8, and the first slider 9 is located between the sensor body 4 and the screw rod. The first slider 9 is rotatably connected to the screw rod, and the first slider 9 is connected to the sensor body 4 through a spring 10. As an implementation method, the screw rod and the first slider 9 are connected through a bearing, and a mounting groove is provided in the first slider 9. The bearing is installed in the mounting groove, and the outer ring of the bearing is fixed to the inner wall of the mounting groove, and the inner ring of the bearing is fixedly connected to one end of the screw rod; the two ends of the spring 10 are respectively fixedly connected to the sensor body 4 and the first slider 9. With such a design, the contact force between the sensor body 4 and the concrete specimen can be adjusted, so that the detection end of the sensor body 4 always rests on the specimen, reducing the influence of the contact pressure on the acoustic emission monitoring results of the test process, and improving the accuracy and stability of the acoustic emission signal monitored by the sensor.

[0039] In order to facilitate replacement when the sensor body 4 fails, the following improvements are made: a second slider 11 is also provided in the installation tube 8, the second slider 11 is located between the sensor body 4 and the spring 10, the second slider 11 is connected to the sensor body 4 by screws, and the second slider 11 is fixedly connected to the spring 10. A connection cap 12 is threadedly installed at one end of the installation tube 8 close to the center line of the first ring 1, and a through hole 121 is provided on the connection cap 12 for the sensor body 4 to pass through. When the sensor body 4 needs to be replaced, the connection cap 12 is unscrewed, the screw is rotated, and the sensor body 4 is extended out of the installation tube 8 until the second slider 11 is exposed, and then the screws connecting the sensor body 4 and the second slider 11 are removed by a screwdriver, and the sensor body 4 is removed, and the connection cap 12 is screwed on again after replacing the new sensor body 4.

[0040] See also Figure 1-Figure 2 As shown, in order to facilitate adjusting the sensor bodies 4 on multiple connecting columns 5 to the same height, a scale 53 may be provided on the connecting column 5 , and the scale 53 is arranged along the length direction of the connecting column 5 .

[0041] A wire hole (not shown) is formed on the side wall of the mounting tube 8, and the output wire of the sensor body 4 passes through the wire hole and is connected to the display device.

[0042] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above are only preferred embodiments of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. An acoustic emission sensor, characterized in that: The invention comprises a first ring (1), a second ring (2), a mounting seat (3) and a sensor body (4); the first ring (1) and the second ring (2) are arranged in parallel up and down and are connected via a connecting column (5); the mounting seat (3) is slidably mounted on the connecting column (5); the mounting seat (3) is provided with a locking member (6) for locking the mounting seat (3) on the connecting column (5); the sensor body (4) is slidably mounted on the mounting seat (3); the detection end of the sensor body (4) faces the center line of the first ring (1); and the mounting seat (3) is provided with an adjusting member (7) for adjusting the sensor body (4).

2. The acoustic emission sensor according to claim 1, characterized in that: The mounting seat (3) is slidably mounted on the connecting column (5); a mounting tube (8) is fixedly mounted on the mounting seat (3); one end of the mounting tube (8) is open, and the opening of the mounting tube (8) faces the center line of the first ring (1); the sensor body (4) is slidably mounted in the mounting tube (8); the adjusting member (7) is a screw rod, the screw rod is threadedly connected to the mounting tube (8), and one end of the screw rod is rotatably connected to the sensor body (4).

3. The acoustic emission sensor according to claim 2, characterized in that: The mounting seat (3) is provided with a mounting hole (31), and the mounting seat (3) is sleeved on the connecting column (5) through the mounting hole (31); a sidewall of the connecting column (5) is provided with an avoidance hole (51), and the avoidance hole (51) is arranged along the length direction of the connecting column (5); and the mounting tube (8) passes through the avoidance hole (51).

4. The acoustic emission sensor according to claim 3, characterized in that: A first slider (9) is slidably installed in the installation tube (8). The first slider (9) is located between the sensor body (4) and the screw rod. The first slider (9) is rotationally connected to the screw rod. The first slider (9) and the sensor body (4) are connected via a spring (10).

5. The acoustic emission sensor according to claim 4, characterized in that: A second slider (11) is also provided in the installation tube (8); the second slider (11) is located between the sensor body (4) and the spring (10); the second slider (11) is connected to the sensor body (4) via screws; and the second slider (11) is fixedly connected to the spring (10).

6. The acoustic emission sensor according to claim 5, characterized in that: A connection cap (12) is threadedly mounted on one end of the installation tube (8) close to the center line of the first ring (1), and a through hole (121) is provided on the connection cap (12) for the sensor body (4) to pass through.

7. The acoustic emission sensor according to claim 1, characterized in that: The locking member (6) is a bolt, which is threadedly connected to the mounting seat (3), and one end of the bolt can be tightly pressed against the connecting column (5).

8. The acoustic emission sensor according to claim 7, characterized in that: There are two bolts, which are symmetrically arranged on both sides of the connecting column (5).

9. The acoustic emission sensor according to claim 8, characterized in that: A positioning groove (52) is provided on the side surface of the connecting column (5) along the length direction of the connecting column (5), and the positioning groove (52) is arranged opposite to the bolt.

10. The acoustic emission sensor according to claim 1, characterized in that: The connecting column (5) is provided with a scale (53), and the scale (53) is arranged along the length direction of the connecting column (5).

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