Acoustic emission probe fixing frame device for uniaxial compression test
By designing a frame device that uses low elastic springs to fix the acoustic emission probe, the problems of insufficient fixation and short service life of the probe are solved, and the effect of stable fixation and extended service life is achieved, and it is suitable for various specimen shapes.
Patent Information
- Application Number
- CN202421193878.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the prior art, the acoustic emission probe is insufficient in the uniaxial compression test, which is easy to fall off, and is easily damaged after the test, which affects the service life. At the same time, the fixing method is time-consuming and labor-intensive, making it difficult to be suitable for test pieces of various sizes and shapes.
A sound emission probe fixing frame device is designed, and the probe is fixed to the specimen using the telescopic principle of low elastic spring, which avoids the use of glue, improves the fixing stability, and reduces the difficulty of subsequent cleaning and maintenance.
It realizes the stable fixation of the acoustic emission probe, avoids slipping and damage of the probe, extends the service life, and is also suitable for test pieces of various sizes and shapes, simplifying the operation process.
Smart Images
Figure CN222882627U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fixed frame devices, in particular to an acoustic emission probe fixed frame device for uniaxial compression tests. Background Art
[0002] In the process of acoustic emission monitoring, the acoustic emission probe is a key device. It converts the detected acoustic emission waves into voltage signals through the working principle of piezoelectric effect, which are further processed by the signal processor. Therefore, it is crucial to ensure that the acoustic emission probe can be firmly attached to the surface of the test material such as rock and concrete and stably receive signals. At present, for uniaxial compression tests, especially for cylindrical specimens, the fixing method of the acoustic emission probe is usually to directly stick it on the surface of the specimen using methods such as tape, strong adhesive or epoxy resin.
[0003] However, the above technologies often have the following defects: the acoustic emission probe is not fixed enough and is easy to fall off from the surface of the specimen; after the test, the acoustic emission probe is easily damaged, which affects its service life; when multiple specimens are tested, the acoustic emission probe needs to be reused, and before each replacement of a new specimen, the residual adhesive on the probe surface needs to be cleaned, which is time-consuming and laborious, and may wear the probe and reduce its service life. Therefore, the traditional method of fixing the acoustic emission probe is not only time-consuming and labor-intensive, but also difficult to achieve the expected fixing effect, and needs to be improved; therefore, in response to the above problems, an acoustic emission probe fixing frame device for uniaxial compression test is proposed. Utility Model Content
[0004] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.
[0005] The technical solution adopted by the utility model to solve the technical problem is as follows: the utility model discloses an acoustic emission probe fixing frame device for uniaxial compression test, comprising a bottom fixing device; the bottom fixing device is connected to a plurality of columns, the columns are connected to an acoustic emission probe fixing device, the columns are provided with an acoustic emission probe fixing device groove, the acoustic emission probe fixing device groove is provided with a low-elasticity spring connected to the acoustic emission probe fixing device; the test piece is placed at the center position of the bottom fixing device, the bottom fixing device supports the columns, the acoustic emission probe fixing device and the low-elasticity spring, and then Then, one end of the probe is pressed against the low-elasticity spring, and the other end of the probe is pressed against the test piece. The fixation of the probe utilizes the expansion and contraction principle of the low-elasticity spring, that is, a load is applied to the low-elasticity spring to shorten it. At this time, the low-elasticity spring will generate an antagonistic force, thereby firmly clamping the probe between the low-elasticity spring and the test piece, so that the probe and the surface of the test piece can be directly attached without glue, and the slippage of the probe caused by glue adhesion is avoided. There is no need to grind and remove the glue after the test, which increases the service life of the acoustic probe. At the same time, it can be applied to test pieces of various sizes and shapes, which is convenient for personnel to operate.
[0006] Preferably, the bottom fixing device includes a circular ring and a plurality of cylindrical magnets, the cylindrical magnet is wrapped in the circular ring, and the cylindrical magnet is fixedly connected through the magnet at the bottom of the column. The bottom fixing device can control its radius according to the size of the circular ring; it is convenient to control the radius of the bottom fixing device according to usage requirements to meet the usage requirements of various sizes.
[0007] Preferably, the column and the acoustic emission probe fixture are connected via an acoustic emission probe fixture groove, and magnets are also provided on the contact surfaces of the column and the acoustic emission probe fixture; thereby making the connection between the column and the acoustic emission probe fixture more secure.
[0008] Preferably, the height of the column is 80% of the height of the specimen, so as to avoid the longitudinal deformation of the specimen being affected by the top surface of the column during the test.
[0009] Preferably, the ring, the column and the acoustic emission probe fixing device are all made of common plastic materials, which can greatly reduce the cost.
[0010] Preferably, the cylindrical magnet is made of neodymium iron boron material; and the low elasticity spring is made of chrome vanadium spring steel wire.
[0011] The beneficial effects of the utility model are as follows:
[0012] 1. The utility model discloses an acoustic emission probe fixing frame device for uniaxial compression test. By making one end of the probe contact with a low-elasticity spring and the other end of the probe contact with a test piece, the fixation of the probe utilizes the expansion and contraction principle of the low-elasticity spring, that is, applying a load on the low-elasticity spring to shorten it, at which time the low-elasticity spring will generate a counterforce, thereby firmly clamping the probe between the low-elasticity spring and the test piece, so that the probe and the surface of the test piece can be directly attached without glue, and the slippage of the probe caused by glue adhesion is avoided. There is no need to perform the process of grinding and removing the glue after the test, thereby improving the service life of the acoustic probe. At the same time, it can be applied to test pieces of various sizes and shapes, which is convenient for personnel to operate.
[0013] 2. The acoustic emission probe fixing frame device for uniaxial compression test described in the utility model can greatly reduce costs by making the ring, column and acoustic emission probe fixing device all of which are made of general plastic materials; the height of the column is 80% of the height of the specimen to avoid the longitudinal deformation of the specimen being affected by the top surface of the column during the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings.
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0016] Figure 2 It is a three-dimensional structural schematic diagram of the bottom fixing device in the utility model;
[0017] Figure 3 It is a three-dimensional structural schematic diagram of the groove of the acoustic emission probe fixing device in the utility model;
[0018] Figure 4 It is a three-dimensional structural schematic diagram of the low elastic force spring in the utility model.
[0019] In the figure: 1. bottom fixing device; 2. column; 3. acoustic emission probe fixing device; 4. ring; 5. cylindrical magnet; 6. acoustic emission probe fixing device groove; 7. low elasticity spring. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0021] Embodiment 1: Figures 1 to 4As shown, an acoustic emission probe fixing frame device for uniaxial compression test described in an embodiment of the utility model comprises a bottom fixing device 1; the bottom fixing device 1 is connected to a plurality of columns 2, the columns 2 are connected to acoustic emission probe fixing devices 3, the columns 2 are provided with acoustic emission probe fixing device grooves 6, and the acoustic emission probe fixing device grooves 6 are provided with low elasticity springs 7 connected to the acoustic emission probe fixing devices 3; when working, a test piece (not shown in the figure) is placed at the center of the bottom fixing device 1, the bottom fixing device 1 supports the columns 2, the acoustic emission probe fixing devices 3 and the low elasticity springs 7, and then the probe ( One end of the probe (not shown in the figure) is in contact with the low-elasticity spring 7, and the other end of the probe (not shown in the figure) is in contact with the test piece. The fixation of the probe utilizes the expansion and contraction principle of the low-elasticity spring 7, that is, a load is applied to the low-elasticity spring 7 to shorten it. At this time, the low-elasticity spring 7 will generate an antagonistic force, thereby firmly clamping the probe between the low-elasticity spring 7 and the test piece, so that the probe and the surface of the test piece can be directly attached without glue, and the slippage of the probe caused by glue adhesion is avoided. There is no need to grind and remove the glue after the test, which increases the service life of the acoustic probe. At the same time, it can be applied to test pieces of various sizes and shapes, which is convenient for personnel to operate.
[0022] Furthermore, the bottom fixing device 1 includes a ring 4 and a plurality of cylindrical magnets 5. The cylindrical magnet 5 is wrapped in the ring 4. The cylindrical magnet 5 is fixedly connected through the magnet at the bottom of the column 2. The bottom fixing device 1 can control its radius according to the size of the ring 4. During production, it is convenient to control the radius of the bottom fixing device 1 according to the use requirements to meet the use requirements of various sizes.
[0023] Furthermore, the column 2 and the acoustic emission probe fixture 3 are connected via an acoustic emission probe fixture groove 6, and magnets are also provided on the contact surfaces of the column 2 and the acoustic emission probe fixture 3; during operation, the column 2 and the acoustic emission probe fixture 3 are connected more firmly.
[0024] Furthermore, the height of the column 2 is 80% of the height of the specimen; during operation, the longitudinal deformation of the specimen (not shown in the figure) is prevented from being affected by the top surface of the column 2 during the test.
[0025] Furthermore, the ring 4, the column 2 and the acoustic emission probe fixing device 3 are all made of common plastic materials; when working, the cost can be greatly reduced.
[0026] Furthermore, the cylindrical magnet 5 is made of neodymium iron boron material; the low elasticity spring 7 is made of chrome vanadium spring steel wire.
[0027] Working principle: place the test piece (not shown in the figure) at the center of the bottom fixing device 1, the bottom fixing device 1 supports the column 2, the acoustic emission probe fixing device 3 and the low-elasticity spring 7, and then one end of the probe (not shown in the figure) is in contact with the low-elasticity spring 7, and the other end of the probe (not shown in the figure) is in contact with the test piece. The fixation of the probe utilizes the expansion and contraction principle of the low-elasticity spring 7, that is, a load is applied to the low-elasticity spring 7 to shorten it. At this time, the low-elasticity spring 7 will generate an antagonistic force, thereby firmly clamping the probe between the low-elasticity spring 7 and the test piece, so that the probe and the surface of the test piece can be directly attached without glue, and the situation of probe slippage caused by glue adhesion is avoided. There is no need to perform the process of grinding and removing glue after the test, which increases the service life of the acoustic probe; at the same time, it can be applied to test pieces of various sizes and shapes, which is convenient for personnel to operate;
[0028] The column 2 and the acoustic emission probe fixture 3 are connected via an acoustic emission probe fixture slot 6, and magnets are also provided on the contact surfaces of the column 2 and the acoustic emission probe fixture 3, thereby making the connection between the column 2 and the acoustic emission probe fixture 3 more secure;
[0029] The height of the column 2 is 80% of the height of the specimen, so as to prevent the longitudinal deformation of the specimen from being affected by the top surface of the column 2 during the test.
[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. An acoustic emission probe fixing frame device for uniaxial compression test, comprising a bottom fixing device (1); characterized in that: The bottom fixing device (1) is connected to a plurality of columns (2), the columns (2) are connected to an acoustic emission probe fixing device (3), the columns (2) are provided with an acoustic emission probe fixing device groove (6), and a low-elasticity spring (7) connected to the acoustic emission probe fixing device (3) is provided in the acoustic emission probe fixing device groove (6).
2. The acoustic emission probe fixing frame device for uniaxial compression test according to claim 1, characterized in that: The bottom fixing device (1) comprises a circular ring (4) and a plurality of cylindrical magnets (5), wherein the cylindrical magnets (5) are enclosed in the circular ring (4) and are fixedly connected to the magnets at the bottom of the column (2). The radius of the bottom fixing device (1) can be controlled according to the size of the circular ring (4).
3. The acoustic emission probe fixing frame device for uniaxial compression test according to claim 2, characterized in that: The column (2) and the acoustic emission probe fixing device (3) are connected via an acoustic emission probe fixing device slot (6), and magnets are also provided on the contact surfaces of the column (2) and the acoustic emission probe fixing device (3).
4. The acoustic emission probe fixing frame device for uniaxial compression test according to claim 3, characterized in that: The height of the column (2) is 80% of the height of the test piece.
5. The acoustic emission probe fixing frame device for uniaxial compression test according to claim 4, characterized in that: The circular ring (4), the column (2) and the acoustic emission probe fixing device (3) are all made of general plastic materials.
6. The acoustic emission probe fixing frame device for uniaxial compression test according to claim 5, characterized in that: The cylindrical magnet (5) is made of neodymium iron boron material.
7. The acoustic emission probe fixing frame device for uniaxial compression test according to claim 6, characterized in that: The low-elasticity spring (7) is made of chrome-vanadium spring steel wire.