Flexible sensor clamp

Abstract

The utility model belongs to the field of coal rock mechanics tests, and relates to a flexible sensor clamp which comprises a clamp body, an elastic piece and a fixed installation structure, one end of the clamp body is open, a through groove is formed in the side face of the clamp body, and the through groove is used for containing a wire connected with a sensor; the elastic piece is installed in an inner cavity of the clamp body in the axial direction of the clamp body, one end of the elastic piece is fixed to the inner wall of the clamp body, the other end of the elastic piece is located at an opening of the clamp body, and the elastic piece is in contact connection with an external sensor to be installed through a baffle installed in the clamp body in a sliding mode. The sensor abuts against an external test piece to be detected; the fixed mounting structure is arranged on the clamp body and is used for fixedly connecting the clamp body to a test piece so as to realize the mounting of the sensor. According to the invention, the detection sensitivity and stability of the sensor are improved, the operation process is simplified, the service life of the sensor is prolonged, and the sensor has obvious superiority.

Description

Technical Field

[0001] The utility model belongs to the field of coal and rock mechanics tests and relates to a flexible sensor fixture. Background Art

[0002] In coal and rock mechanics tests, in order to obtain the mechanical property data of coal and rock specimens under different conditions, various sensors are needed to monitor parameters such as the deformation, stress, and strain of coal and rock specimens. These sensors need to be firmly fixed on the coal and rock specimens to ensure the accuracy and reliability of the data. At the same time, since coal and rock mechanics tests usually involve high-intensity vibration and impact, the fixed installation of the sensors must have sufficient durability and stability.

[0003] However, there is no structure for fixed installation on some small-sized sensors. In the prior art, in order to fixedly install a small-sized sensor on a coal and rock specimen, the small-sized sensor is usually fixedly encapsulated in a shell, and then the shell is integrally fixed on the coal and rock specimen by using a clamp. This installation method can achieve the rapid fixation of the sensor and also provides physical protection for the sensor. However, this installation method also has some deficiencies.

[0004] Firstly, since the sensor is encapsulated in a shell, the contact between the sensor and the coal and rock specimen is realized through the shell. This indirect contact method may reduce the detection sensitivity of the sensor because the shell may hinder the energy transfer between the sensor and the coal and rock specimen. Secondly, during vibration tests, since the connection between the shell and the coal and rock specimen is rigid, the shell may be affected by vibration and damage the sensor. In addition, the weight and rigidity of the shell itself may also affect the mechanical properties of the coal and rock specimen, thereby affecting the accuracy of the test results. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a flexible sensor fixture to solve the problems of the prior art.

[0006] To achieve the above purpose, the utility model provides the following technical solution:

[0007] A flexible sensor fixture includes a fixture body, an elastic member, and a fixed installation structure. One end of the fixture body is open, and a through groove is provided on the side surface of the fixture body. The through groove is used for placing a wire connected to the sensor.

[0008] The elastic member is axially installed in the inner cavity of the fixture body. One end of the elastic member is fixed to the inner wall of the fixture body, and the other end is located at the opening of the fixture body. A baffle is slidably installed in the inner cavity of the fixture body, and the elastic member is in contact with an externally to-be-installed sensor through the baffle, thereby pressing the sensor against an externally to-be-detected specimen.

[0009] The fixed installation structure is arranged on the fixture body and is used to fixedly connect the fixture body to the specimen to realize the installation of the sensor.

[0010] Further, the fixed installation structure includes a fixed support column and a clamp arranged on the outer side of the fixture body. The clamp is sleeved on the external specimen and sleeves the fixed support column in a direction perpendicular to the axial direction of the fixed support column, so as to fixedly install the fixture body axially on the external specimen.

[0011] Further, the fixed installation structure includes a permanent magnet and an iron sheet arranged at the opening end of the fixture body. The iron sheet is fixedly bonded to the specimen to fixedly install the fixture body axially on the external specimen by magnetic attraction with the permanent magnet.

[0012] Further, the specimen is a coal and rock sample.

[0013] Further, the outer shape of the fixture body is a cylinder, a square column or an elliptical cylinder.

[0014] Further, the fixture body is made of a high-strength aluminum alloy material.

[0015] Further, the elastic member is a compression spring.

[0016] Further, the compression spring is made of a stainless steel material.

[0017] The beneficial effects of the present utility model are as follows:

[0018] Compared with the existing technology, the beneficial effects of a flexible sensor fixture provided by the present utility model are as follows:

[0019] 1. Improve detection sensitivity: In this application, an opening is provided at one end of the fixture body, so that the sensor is in direct contact with the coal and rock sample, thereby ensuring the accuracy of the sensor detection. This direct contact method avoids the obstruction of the energy transfer between the sensor and the coal and rock sample by the housing, improves the detection sensitivity of the sensor, and is especially suitable for small-size sensors.

[0020] 2. Enhance durability and stability: In this application, a compression spring is provided in the fixture body, so that the connection between the sensor, the coal and rock sample, and the fixture body forms a flexible connection. This flexible connection can effectively reduce the impact of vibration on the sensor, thereby enhancing the durability and stability of the sensor. At the same time, due to the buffering effect of the compression spring, the influence of the self-weight and rigidity of the housing on the mechanical properties of the coal and rock sample is also reduced, thereby improving the accuracy of the test results.

[0021] 3. Simplify the operation process: The flexible sensor fixture provided in this application can realize the axial fixed installation of the fixture body on the coal and rock sample by providing fixed struts on the outer side of the fixture body that cooperate with the clamp; or use a permanent magnet fixedly installed at the open end of the fixture body for magnetic attraction connection; and a through groove for placing the sensor wire is directly provided on the side to facilitate the direct placement of the sensor with the wire. The entire installation process is simple, and the same flexible sensor fixture can adapt to different sensors within a certain size range.

[0022] 4. Extend the service life: Since the connection between the sensor and the coal and rock sample in this application is flexible, and the presence of the compression spring can absorb vibration and impact, the possibility of damage to the sensor during vibration testing can be effectively reduced, thereby extending the service life of the sensor.

[0023] Generally speaking, a flexible sensor fixture provided by the present utility model, compared with the existing technology, not only improves the detection sensitivity and stability of the sensor, simplifies the operation process, but also extends the service life of the sensor, showing obvious superiority.

[0024] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0026] Figure 1 It is a schematic structural diagram of a flexible sensor fixture in Embodiment 1;

[0027] Figure 2 It is an installation schematic diagram of a flexible sensor fixture in Embodiment 1;

[0028] Figure 3Schematic structural diagram of a flexible sensor fixture in Embodiment 2.

[0029] Reference numerals: fixture body 1, through groove 2, compression spring 3, fixed pillar 4, baffle 5, sensor 6, coal and rock specimen 8, clamp 9, permanent magnet 10. Detailed implementation manners

[0030] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation on the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which does not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and should not be construed as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 2 , which is a flexible sensor fixture, including a fixture body 1, a compression spring 3 and a clamp 9. One end of the fixture body 1 is open, and a through groove 2 for placing the wire of the sensor 6 is provided on the side of the fixture body 1. The compression spring 3 is axially installed in the inner cavity of the fixture body 1, and one end of the compression spring 3 is fixed on the inner wall of the fixture body 1, and the other end is located at the opening of the fixture body 1 to be in contact connection with the sensor 6 to be installed.

[0035] The flexible sensor fixture provided in this embodiment enables the sensor 1 to be in direct contact with the coal and rock specimen 8, thus ensuring the accuracy of sensor detection. At the same time, a compression spring 3 is provided in the fixture body 1, so that the connection between the sensor 6, the coal and rock specimen 8 and the fixture body 1 forms a flexible connection, thus ensuring that the sensor 6 can also be used well under vibration conditions and improving its service life.

[0036] Furthermore, a fixed support 4 that cooperates with the clamp 9 is also provided on the outer side of the fixture body 1 to cooperate with the clamp 9 to fixedly install the fixture body 1 axially on the coal and rock specimen 8 as the fixed installation structure of the fixture body 1.

[0037] Specifically, the clamp 9 is sleeved on the coal and rock specimen 8, and the fixed support 4 is sleeved therein along the direction perpendicular to the axial direction of the fixed support 4 to fixedly install the fixture body 1 axially on the coal and rock specimen 8.

[0038] And there are two fixed supports 4, which are arranged oppositely on the fixture body 1 to avoid unilateral force on the fixture body 1, thereby ensuring the stability of the fixture body 1.

[0039] Preferably, a baffle 5 is further provided at one end of the compression spring 3 close to the opening of the fixture body to ensure the stability of the connection between the sensor 6 and the compression spring 3 and prevent the sensor 6 from falling into the compression spring 3.

[0040] Specifically, the fixture body 1 is made of high-strength aluminum alloy material, the compression spring 3 is made of stainless steel material, and is axially installed in the inner cavity of the fixture body 1. One end of the compression spring 3 is fixed on the inner wall of the fixture body, and the other end is located at the opening of the fixture body to be in contact and connected with the sensor to be installed; the clamp is made of high-strength aluminum alloy material.

[0041] Specifically, the outer shape of the fixture body 1 can be adjusted adaptively according to needs, such as a cylinder, a square column or an elliptical cylinder, etc. In this embodiment, a square column is preferably used. The outer shape of the coal and rock specimen 8 can be adjusted adaptively according to needs, such as a cylinder or a square column, etc. In this embodiment, a square shape is also preferably used.

[0042] Due to the advancement of this technical solution, it can be widely applied in application fields such as coal and rock mechanics experiments, mechanical engineering, and sensor technology. First of all, in the field of coal and rock mechanics experiments, the sensor flexible fixture of the present invention can significantly improve the detection accuracy and service life of the sensor. By directly contacting the sensor with the coal and rock specimen, the energy transfer hindrance caused by the housing is avoided, thereby improving the detection sensitivity of the sensor. At the same time, the introduction of the compression spring makes the connection between the sensor and the coal and rock specimen a flexible connection, enabling the sensor to be well used under vibration conditions and enhancing the service life. This has important practical significance for coal and rock mechanics experiments that require high-intensity vibration and impact.

[0043] Secondly, in the field of mechanical engineering, the sensor flexible fixture of the present invention can also provide more accurate measurement data. Since the sensor can directly contact the mechanical component, the measurement error caused by the intermediate medium is avoided, thereby improving the measurement accuracy. At the same time, the flexible connection method of the compression spring can also reduce the influence of mechanical vibration on the sensor, improving the stability and durability of the sensor. This has important application value for mechanical engineering that requires high-precision measurement.

[0044] Finally, in the field of sensor technology, the sensor flexible fixture of the present invention provides a new sensor fixing method, which not only simplifies the installation and replacement process of the sensor, but also improves the use performance of the sensor. This is very attractive to both sensor manufacturers and users. With the continuous development of sensor technology, the application of sensors in various fields is becoming more and more extensive, and the sensor flexible fixture of the present invention is expected to play an important role in the field of sensor technology. Generally speaking, the sensor flexible fixture of the present invention has broad application prospects in fields such as coal and rock mechanics experiments, mechanical engineering, and sensor technology, with huge market demand, and is expected to promote technological progress and application innovation in related fields.

[0045] Example 2

[0046] Please refer to Figure 3 , the difference between this embodiment and Embodiment 1 is that a permanent magnet 10 fixedly installed at the opening end of the fixture body 1 is used to replace the fixed support column 4 as the fixed installation structure of the fixture body 1.

[0047] When connecting the fixture body 1 with the coal and rock specimen 8, a iron sheet for magnetic attraction with the permanent magnet 10 needs to be bonded at the position of the coal and rock specimen 8 for installing the sensor in advance, so as to fixedly install the fixture body 1 and the sensor installed therein on the coal and rock specimen 8.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A flexible sensor fixture, characterized in that: It includes a fixture body, an elastic member, and a fixed mounting structure. One end of the fixture body is an opening, and a through groove is provided on the side of the fixture body. The through groove is used to place a wire connected to a sensor. The elastic member is axially installed in the inner cavity of the fixture body. One end of the elastic member is fixed to the inner wall of the fixture body, and the other end is located at the opening of the fixture body. A baffle is slidably installed in the inner cavity of the fixture body, and the elastic member is in contact with an externally to-be-mounted sensor through the baffle, thereby pressing the sensor against an externally to-be-detected specimen. The fixed mounting structure is arranged on the fixture body and is used to fixedly connect the fixture body to the specimen to achieve the installation of the sensor.

2. The flexible sensor fixture according to claim 1, wherein: The fixed mounting structure includes a fixed pillar and a clamp provided on the outer side of the fixture body. The clamp is sleeved on an external specimen, and the fixed pillar is sleeved therein along a direction perpendicular to the axial direction of the fixed pillar, so as to fixedly install the fixture body axially on the external specimen.

3. The flexible sensor fixture according to claim 1, wherein: The fixed mounting structure includes a permanent magnet and an iron sheet provided at the open end of the fixture body. The iron sheet is fixedly bonded to the specimen to fixedly install the fixture body axially on the external specimen through magnetic attraction with the permanent magnet.

4. The flexible sensor fixture according to any one of claims 1 to 3, characterized in that: The specimen is a coal and rock sample.

5. The flexible sensor fixture according to any one of claims 1 to 3, characterized in that: The outer shape of the fixture body is a cylinder, a square column, or an elliptical cylinder.

6. The flexible sensor fixture according to any one of claims 1 to 3, characterized in that: The fixture body is made of a high-strength aluminum alloy material.

7. The flexible sensor fixture according to any one of claims 1 to 3, characterized in that: The elastic member is a compression spring.

8. The flexible sensor fixture according to claim 7, wherein: The compression spring is made of a stainless steel material.

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