Fixing device of sensor

Abstract

The invention discloses a fixing device of a sensor, the fixing device comprises a connecting piece and a limiting piece, at least part of the connecting piece is a magnetic attraction part, the connecting piece is used for connecting the sensor, and the sensor is attracted to tested equipment through the magnetic attraction part; the limiting piece is used for being connected with the tested equipment and is arranged in the radial direction of the connecting piece so as to limit the radial position of the connecting piece on the tested equipment. By adopting the scheme, the sensor is reliably mounted on the tested equipment, the tested equipment is not damaged, the arrangement period is fast, the position of a measuring point is easy to change, and the accuracy and continuity of a measuring signal are not influenced.

Description

Technical Field

[0001] The invention relates to a fixing device for a sensor, in particular to a fixing device for a wireless vibration sensor in the field of mechanical equipment fault diagnosis. Background Art

[0002] Wireless vibration sensors are equipment status monitoring based on wireless technology. They have vibration measurement and temperature measurement functions and are used in industrial equipment monitoring systems to detect problems in a timely manner and ensure the normal and reliable operation of equipment. Wireless vibration sensors can measure the spatial vibrations of the target device in the radial, axial and torsional directions. These vibrations are the manifestation of equipment damage, the main parameters of equipment status monitoring, and the main basis for fault diagnosis. The shape of the wireless vibration sensor can be cylindrical, with a circular cross-section, and its mass is generally several hundred grams.

[0003] Traditional installation methods include bolt fixing, gluing, etc. Among them, the bolt fixing method requires drilling and other machining operations on the object to be measured, which actually destroys the appearance and structure of the equipment, and the operation is cumbersome. Even for high-precision equipment, there are some concerns and concerns that the installation conditions will affect the performance of the equipment. If multiple measuring points need to be installed on a device, even if the position of the measuring point is changed, such operations need to be repeated many times, which is unacceptable to users of important equipment.

[0004] The adhesive method uses adhesive to fix the sensor to the device under test. The advantage of this method is that the connection is relatively reliable and the sensor will not shift under a certain external force. However, since the adhesive is an organic substance with a certain degree of flexibility and elasticity, it will absorb high-frequency vibration signals, which is not conducive to the vibration signal data collection of the device under test and will cause partial signal loss. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sensor fixing device in order to overcome the above-mentioned defects existing in the prior art when fixing the sensor.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A fixing device for a sensor, the fixing device comprising a connecting member and a limiting member, wherein at least a part of the connecting member is a magnetic attraction part, the connecting member is used to connect the sensor and adsorb the sensor to a device under test through the magnetic attraction part;

[0008] The limiting member is used to be connected to the device under test and is arranged in the radial direction of the connecting member to limit the radial position of the connecting member on the device under test.

[0009] In this solution, the sensor can be adsorbed onto the device under test through the connector, and the installation position of the connector is limited by the limiter to prevent the sensor from accidentally moving and falling, so that the connector and the sensor can be reliably installed on the device under test. Compared with the threaded connection method, this method does not require operations such as drilling holes on the device under test, and it is convenient to change the installation position; compared with the gluing method, this connection method can avoid the situation where the glue absorbs the signal and causes inaccurate sensor detection. Therefore, while the sensor can be reliably installed on the device under test, it can avoid damaging the device under test, the layout cycle is fast, the measurement point position is easy to change, and the accuracy and continuity of the measurement signal are not affected.

[0010] Preferably, the connecting member is coaxially connected to the sensor.

[0011] In this solution, the above structural form is adopted, which can transmit the detection signal of the measured point, such as the vibration waveform, to the sensor input point in a radially consistent and accurate manner.

[0012] Preferably, the limiting member is arranged around the connecting member; in the axial direction of the connecting member, the connecting member can move relative to the limiting member.

[0013] In this solution, by adopting the above structural form, the limiter can limit the overall position of the connecting member in the circumferential direction without affecting the movement of the connecting member relative to the limiter in the axial direction, thereby facilitating the removal of the connecting member and the replacement of the connection position of the sensor.

[0014] Preferably, the connecting member is disc-shaped, the limiting member is ring-shaped, and the inner diameter of the limiting member is larger than the outer diameter of the connecting member.

[0015] In this solution, by adopting the above structural form, the position of the connecting part can be adjusted so that there is a certain gap between the limiter and the connecting part, thereby avoiding or reducing the contact between the connecting part and the limiter, so that the state of the device to be tested can be fed back to the sensor through the connecting part, thereby improving the detection accuracy.

[0016] Preferably, the connecting member is a magnet block, and the sensor is connected to the magnet block.

[0017] In this solution, the magnet block is directly used as a connecting piece, and this structure is simple and easy to manufacture.

[0018] Preferably, the connecting member comprises a shell and a magnet, and the magnet is embedded in the shell.

[0019] Preferably, a mounting hole is provided at the center of the housing, and the sensor is threadedly connected to the mounting hole; the magnet is a magnetic ring, and the magnetic ring surrounds the mounting hole and is embedded in the housing.

[0020] In this solution, the sensor can be reliably connected to the housing through the thread and can be arranged coaxially with the housing. The magnetic ring can make the connecting piece as a whole be adsorbed and reliably connected to the device to be tested.

[0021] Preferably, the shell is made of iron material and the magnet is ferrite.

[0022] Preferably, the limiting member is connected to the device under test by gluing.

[0023] In this solution, the limiting member is connected by gluing, so there is no need to perform operations such as drilling holes on the device under test, and a reliable connection can be formed with the device under test.

[0024] Preferably, the limiting member is made of any one of aluminum, aluminum alloy and magnesium alloy, or other materials.

[0025] Preferably, the limiting member comprises a first surface facing the sensor, and the first surface is provided with marking lines.

[0026] In this solution, by setting a marking line on the first surface, it can be used as a reference for sensor installation, thereby facilitating the installation of the sensor.

[0027] Preferably, the limiting member further comprises a second surface facing away from the sensor, and the second surface is provided with an intercepting groove.

[0028] In this solution, by providing an intercepting groove on the second surface, the intercepting groove can perform buffering and block the glue outside the inner hole of the limiting component.

[0029] Preferably, the limiting member has a through hole for surrounding the connecting member, and the intercepting groove is arranged near the edge of the through hole and around the through hole.

[0030] Preferably, the intercepting ditch has a width ranging from 1 mm to 6 mm and a depth ranging from 2 mm to 4 mm.

[0031] Preferably, the limiting member further has an adjusting groove, the adjusting groove passes through the limiting member, and the adjusting groove is communicated with the through hole and / or the intercepting groove.

[0032] In this solution, the gap between the limiter and the connector can be fine-tuned through the adjustment groove; and when installed on a vertical surface, the adjustment groove is vertically downward and can also be used to flow cutting fluid during the machining of the limiter.

[0033] Preferably, the width of the adjustment groove ranges from 3 mm to 20 mm.

[0034] Preferably, the sensor is a wireless vibration sensor.

[0035] The positive and progressive effects of the present invention are: the sensor can be adsorbed onto the device under test through the connector, and the installation position of the connector is limited by the limiter to avoid accidental movement and falling of the sensor, so that the connector and the sensor can be reliably installed on the device under test. Compared with the threaded connection method, this method does not require operations such as drilling holes on the device under test, and it is convenient to change the installation position; compared with the gluing method, this connection method can avoid the situation where the glue absorbs the signal and causes inaccurate detection of the sensor. Therefore, while the sensor can be reliably installed on the device under test, it can avoid damaging the device under test, the layout cycle is fast, the measurement point position is easy to change, and the accuracy and continuity of the measurement signal are not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic structural diagram of a connecting member of a fixing device provided in an embodiment of the present invention;

[0037] Figure 2 for Figure 1 A structural schematic diagram of the middle connector from another perspective;

[0038] Figure 3 A schematic diagram of the structure of a limiting member of a fixing device provided by an embodiment of the present invention at a first surface;

[0039] Figure 4 for Figure 3 A schematic plan view of the middle stopper at the first surface;

[0040] Figure 5 A schematic structural diagram of a stopper of a fixing device provided by an embodiment of the present invention at a second surface;

[0041] Figure 6 for Figure 5 A schematic structural diagram of the middle stopper at the second surface from another viewing angle;

[0042] Figure 7 A schematic diagram of the structure of a sensor provided by an embodiment of the present invention;

[0043] Figure 8 for Figure 7 Schematic diagram of the structure of the sensor and the fixing device.

[0044] Description of reference numerals:

[0045] Fixing device 10, connecting member 100, housing 110, mounting hole 111, magnet 120, stopper 200, first surface 210, marking line 211, second surface 220, intercepting groove 221, recess 222, through hole 230, adjusting groove 240, sensor 20, threaded rod 21. DETAILED DESCRIPTION

[0046] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0047] The embodiment of the present invention provides a fixing device 10 for a sensor 20, and the fixing device 10 is used to connect the sensor 20 to the device under test. According to actual conditions, the sensor 20 can be a variety of types of sensors 20. This embodiment is described by taking the sensor 20 as a wireless vibration sensor 20 as an example, but the protection scope of the present invention should not be limited to the use for connecting the wireless vibration sensor 20. Figure 7 As shown, the wireless vibration sensor 20 is mainly used to measure the vibration of an object, and usually integrates a low-power microcontroller (MCU) and several memories, radio / optical communication devices, vibration sensors 20 and other components. The body of the wireless sensor 20 is generally a cylinder, and a threaded rod 21 with external threads is arranged on its lower side.

[0048] like Figure 1-Figure 8 As shown, the fixing device 10 includes a connector 100 and a stopper 200. The connector 100 is at least partially a magnetic part. The connector 100 is used to connect the sensor 20 and adsorb the sensor 20 to the device under test through the magnetic part; the stopper 200 is used to connect to the device under test and is arranged in the radial direction of the connector 100 to limit the radial position of the connector 100 on the device under test. The sensor 20 can be adsorbed to the device under test by the connector 100, and the installation position of the connector 100 is limited by the stopper 200 to avoid accidental movement and falling of the sensor 20, so that the connector 100 and the sensor 20 can be reliably installed on the device under test. Compared with the threaded connection method, this method does not require operations such as opening holes on the device under test, and is convenient for changing the installation position; compared with the gluing method, this connection method can avoid the situation where the glue absorbs the signal and causes inaccurate detection of the sensor 20. Therefore, the sensor 20 can be reliably installed on the device under test without damaging the device under test, the arrangement cycle is fast, the position of the measuring point can be easily changed, and the accuracy and continuity of the measurement signal will not be affected.

[0049] like Figure 8 As shown, the connector 100 is preferably coaxially connected to the sensor 20. Thus, the detection signal of the measured point, such as a vibration waveform, can be transmitted to the input point of the sensor 20 in a radially consistent and correct manner.

[0050] like Figure 8As shown, the limiting member 200 is arranged around the connecting member 100. In addition, in the axial direction of the connecting member 100, the connecting member 100 can also move relative to the limiting member 200. The limiting member 200 can limit the overall position of the connecting member 100 in the circumferential direction, and does not affect the movement of the connecting member 100 relative to the limiting member 200 in the axial direction, so that it is convenient to remove the connecting member 100 and to replace the connection position of the sensor 20.

[0051] As a specific structural form of the connecting member 100 and the limiting member 200, as Figure 1-6 As shown, the connector 100 is disc-shaped, the stopper 200 is annular, and the inner diameter of the stopper 200 is greater than the outer diameter of the connector 100. The position of the connector 100 can be adjusted so that there is a certain gap between the stopper 200 and the connector 100, thereby avoiding or reducing the contact between the connector 100 and the stopper 200, so that the state of the device to be tested can be fed back to the sensor 20 through the connector 100, thereby improving the detection accuracy. Specifically, the difference between the inner diameter of the stopper 200 and the outer diameter of the connector 100 ranges from 0.5 mm to 2 mm, preferably 0.5 mm.

[0052] like Figure 1 and Figure 2 As shown, the connecting member 100 is a generally disc-shaped structure. Figure 3-Figure 6 As shown, the stopper 200 is in the form of a circular ring structure, so that the stopper 200 can be arranged around the connecting member 100. Figure 8 As shown, the connecting member 100 and the stopper 200 have substantially the same thickness, and their thickness can be the same as the connecting rod of the sensor 20, that is, Figure 7 It is related to the threaded rod 21 in the embodiment, and specifically can be consistent with the rod length of the threaded rod 21.

[0053] As an implementation of the connecting member, the connecting member 100 is a magnet block, and the sensor 20 is connected to the magnet block. The magnet block is directly used as the connecting member 100, and this structure is simple and easy to manufacture. The sensor and the magnet block can be directly connected by means of threaded connection or the like.

[0054] As another embodiment of the connecting member, Figure 1 , Figure 2 and Figure 8 As shown, the connector 100 includes a housing 110 and a magnet 120, and the magnet 120 is embedded in the housing 110. Preferably, the housing 110 is made of iron material, and the magnet 120 is ferrite, so that the connector 100 as a whole has permanent magnetism. Further, the surface of the connector 100 facing the sensor 20 is a substantially flat and smooth surface, and the magnet 120 is embedded in the surface of the connector 100 facing away from the sensor 20, so that the magnet 120 can be firmly adsorbed on the iron device material.

[0055] like Figure 1 and Figure 2 As shown, a mounting hole 111 is provided at the center of the housing 110, and the sensor 20 is threadedly connected to the mounting hole 111; the magnet 120 is a magnetic ring, which surrounds the mounting hole 111 and is embedded in the housing 110. The sensor 20 can be reliably connected to the housing 110 through threads, and can be coaxially arranged with the housing 110. The magnetic ring can make the connector 100 as a whole be adsorbed and reliably connected to the device to be tested. Specifically, the mounting hole 111 is a standard threaded hole, which is connected to the threaded rod 21 of the sensor 20 and fits tightly to the bottom surface of the sensor 20. The shape of its cross section is circular, which can radially and accurately transmit the vibration waveform of the measured point to the input point of the sensor 20.

[0056] A variety of connection methods can be used between the limit member 200 and the device under test. In a preferred embodiment, the limit member 200 is connected to the device under test by gluing. The limit member 200 is connected by gluing, so there is no need to perform operations such as opening holes in the device under test, and it can also form a reliable connection with the device under test. Specifically, the gluing method of the limit member 200 is combined with the magnetic attraction method of the above-mentioned connector 100, so that the sensor 20 can be tightly connected to the position of the device under test, avoiding the structural destructiveness and vibration signal distortion associated with the traditional method, and can effectively transmit the vibration waveform of the measured point without affecting the sensitivity performance of the sensor 20. In addition, the magnetic attraction method is adsorbed to the measured point, and the sensor 20 can be installed or removed quickly and non-destructively, which is convenient for battery replacement or sensor 20 maintenance.

[0057] The limiting member 200 is made of any one of aluminum, aluminum alloy and magnesium alloy, or other materials; among them, aluminum is preferred because it is light in weight.

[0058] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the stopper 200 includes a first surface 210 facing the sensor 20 and a second surface 220 facing away from the sensor 20 ; specifically, the first surface 210 and the second surface 220 are both substantially flat surfaces.

[0059] like Figure 3 and Figure 4 As shown, the first surface 210 is provided with a marking line 211. By providing the marking line 211 on the first surface 210, it can be used as a reference for the installation of the sensor 20, thereby facilitating the installation of the sensor 20. Specifically, it can be used to align the three-axis measurement orientation with the wireless vibration sensor 20. Therefore, the position limiter 200 and its marking line 211 can effectively prevent the displacement and rotation of the wireless vibration sensor 20, avoid the change of the three-axis measurement reference orientation caused by the rotation of the sensor 20, and thus avoid the increase of data conditioning work.

[0060] like Figure 5 and Figure 6 As shown, the second surface 220 is provided with an intercepting groove 221. The intercepting groove 221 can buffer and block the glue outside the inner hole of the limiting member 200 to prevent the glue from overflowing into the inner hole of the limiting member 200.

[0061] Specifically, the limiting member 200 has a through hole 230 for surrounding the connecting member 100 , and the intercepting groove 221 is arranged near the edge of the through hole 230 and surrounding the through hole 230 .

[0062] Further, the intercepting groove 221 has a width ranging from 1 mm to 6 mm, and a depth ranging from 2 mm to 4 mm. Preferably, the intercepting groove 221 has a width of 1.8 mm, and a depth of 3.5 mm.

[0063] like Figure 3-Figure 6 As shown, the stopper 200 also has an adjustment groove 240, which runs through the stopper 200 and is connected to the through hole 230 and / or the intercepting groove 221. By setting the adjustment groove 240 so that the stopper 200 is disconnected at this location, the gap between the stopper 200 and the connecting member 100 can be fine-tuned; and the diameter of the through hole 230 of the stopper 200 can also be fine-tuned elastically to adapt to the inconsistency of the size of the connecting member 100. And when installed on a vertical surface, the adjustment groove 240 is vertically downward, and can also be used to flow cutting fluid when the stopper 200 is processed.

[0064] Further, the width of the adjusting groove 240 ranges from 3 mm to 20 mm. Preferably, the width of the adjusting groove 240 is 3 mm.

[0065] like Figure 5 As shown, a recess 222 is further provided at the outer edge of the second surface 220 .

[0066] In a specific implementation, the fixing device 10 can be installed on a vertical surface, a horizontal surface, or an inclined surface when installing the sensor 20. Taking the installation on a vertical surface as an example, the following steps can be specifically performed:

[0067] S100: Install the limit member 200. Specifically, apply a small amount of glue, such as AB glue, evenly on the second surface 220 of the limit member 200, and let the adjustment groove 240 point vertically downward. Press the limit member 200 on the test point of the device to be tested. Due to the buffering of the intercepting groove 221, the glue will be blocked outside the through hole 230 of the limit member 200. After waiting for a certain period of time, such as 3 to 5 minutes, the glue will initially solidify.

[0068] S200: Then install the connector 100. Specifically, insert the surface of the connector 100 facing away from the sensor 20 into the through hole 230 of the limit member 200. Since the inner diameter of the limit member 200 is slightly larger than the outer diameter of the connector 100, the position of the connector 100 can be slightly adjusted so that there is a certain gap between the connector 100 and the limit member 200. The connector 100 and the limit member 200 can also be adjusted to an approximately coaxial position.

[0069] S300: Connect the sensor 20 to the connector 100. Specifically, the threaded rod 21 of the wireless vibration sensor 20 can be screwed onto the connector 100 by threading, and the sensor 20 and the connector 100 are rotated until they are adjusted to a spatial orientation flush with the marking line 211 of the limit member 200.

[0070] When the sensor 20 needs maintenance or battery replacement, the sensor 20 can be screwed out of the mounting hole 111 of the connector 100, or the sensor 20 can be pulled out together with the connector 100 and the change can be performed. When it needs to be installed again, the above steps can be performed as required, and the sensor 20 only needs to be adjusted to a position where the marking line 211 of the limiter 200 is flush, and the initial detection position can be restored.

[0071] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A fixing device for a sensor, characterized in that: The fixing device comprises a connecting member and a limiting member, wherein at least a part of the connecting member is a magnetic attraction part, and the connecting member is used to connect the sensor and adsorb the sensor to the device under test through the magnetic attraction part; The limiting member is used to be connected to the device under test and is arranged in the radial direction of the connecting member to limit the radial position of the connecting member on the device under test.

2. The sensor fixing device according to claim 1, characterized in that: The connecting piece is coaxially connected to the sensor; And / or, the limiting member is arranged around the connecting member; And / or, the connecting member is disc-shaped, the limiting member is ring-shaped, and the inner diameter of the limiting member is larger than the outer diameter of the connecting member.

3. The sensor fixing device according to claim 1, characterized in that: The connecting piece is a magnet block, and the sensor is connected to the magnet block; Alternatively, the connecting member includes a shell and a magnet, and the magnet is embedded in the shell.

4. The sensor fixing device according to claim 3, characterized in that: A mounting hole is provided at the center of the housing, and the sensor is threadedly connected to the mounting hole; the magnet is a magnetic ring, and the magnetic ring surrounds the mounting hole and is embedded in the housing; And / or, the shell is made of iron material and the magnet is ferrite.

5. The sensor fixing device according to claim 1, characterized in that: The limiting member is connected to the device under test by gluing; And / or, the limiting member is made of any one of aluminum, aluminum alloy and magnesium alloy.

6. The sensor fixing device according to claim 1, characterized in that: The limiting member comprises a first surface facing the sensor, and a marking line is provided on the first surface.

7. The sensor fixing device according to claim 1, characterized in that: The limiting member further comprises a second surface facing away from the sensor, and the second surface is provided with an intercepting groove.

8. The sensor fixing device according to claim 7, characterized in that: The limiting member has a through hole for surrounding the connecting member, and the intercepting groove is arranged near the edge of the through hole and around the through hole; And / or, the intercepting ditch has a width ranging from 1 mm to 6 mm and a depth ranging from 2 mm to 4 mm.

9. The sensor fixing device according to claim 8, characterized in that: The limiting member also has an adjustment slot, and the adjustment slot passes through the limiting member. The adjusting groove is connected to the through hole and / or the intercepting groove; and / or the adjusting groove has a groove width ranging from 3 mm to 20 mm.

10. The sensor fixing device according to any one of claims 1 to 9, characterized in that: The sensor is a wireless vibration sensor.

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