Vibration sensor transverse sensitivity detection apparatus and system

Abstract

The application relates to a vibration sensor transverse sensitivity detection device and system, which is used for detecting the transverse sensitivity of a measured sensor, and comprises a base, a centering cone sleeve, a cone shaft, a scale disc and a screw. The base comprises a main body and a base, and the main body is provided with an inner cavity. The centering cone sleeve is attached to the inner wall of the inner cavity, and the cone shaft passes through the inner cavity and abuts against the centering cone sleeve. When the vibration sensor transverse sensitivity detection device is in a detection state, the measured sensor is fixedly connected to the cone shaft, the scale disc is connected to the cone shaft, the surface of the scale disc is marked with a plurality of scale lines which are equally divided by 360 degrees, the screw comprises an implantation part and a nail head part, the implantation part and the nail head part are fixedly connected, the implantation part is embedded in the cone shaft, and the nail head part is provided with a gasket between the base. The transverse sensitivity measurement of any angle can be realized by rotating the scale disc to change the angle.

Description

Technical Field

[0001] This invention relates to the field of sensor detection, and in particular to a device and system for detecting the lateral sensitivity of a vibration sensor. Background Technology

[0002] Lateral sensitivity is a crucial performance indicator for many vibration sensors, characterizing their quality. Inadequate structural design or improper assembly can create additional stress, causing the sensor's mounting axis to misalign with its actual sensing axis, forming a small angle. Therefore, a maximum sensitivity exists on the actual sensing axis. The projection of this maximum sensitivity onto the mounting axis is the actual sensitivity, while its projection onto the plane normal to the mounting axis is its lateral sensitivity.

[0003] Currently, the main devices for measuring lateral sensitivity include uniaxial vibration excitation, biaxial vibration excitation, and triaxial vibration excitation. However, the hardware used in biaxial and triaxial vibration excitation methods is expensive and not suitable for widespread use. Existing devices for measuring lateral sensitivity include... Figure 1 As shown, the detection method used is the uniaxial vibration excitation method. The uniaxial vibration excitation method uses a uniaxial vibration table plus a rotating octahedron, which has low hardware cost and is easy to promote. It can be seen that this method can only measure the lateral sensitivity at 8 angles within a 360-degree range, and cannot achieve continuous angle measurement, nor can it accurately rotate to the specified angle to be measured. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a transverse sensitivity detection device and system for vibration sensors that can realize transverse sensitivity measurement at any angle.

[0005] On one hand, this application provides a vibration sensor lateral sensitivity detection device for detecting the lateral sensitivity of the sensor under test, the vibration sensor lateral sensitivity detection device comprising:

[0006] The base includes a main body and a base, the main body and the base are fixedly connected, and the main body is provided with an inner cavity;

[0007] A centering cone sleeve is attached to the inner wall of the inner cavity, and there is at least one centering cone sleeve;

[0008] A conical shaft passes through the inner cavity and abuts against a centering conical sleeve; when the vibration sensor lateral sensitivity detection device is in the detection state, the sensor under test is fixedly connected to the conical shaft;

[0009] A graduated dial, connected to a conical shaft, has multiple graduation lines evenly divided into 360 degrees engraved on its surface;

[0010] The screw includes an implant portion and a head, the implant portion and the head being fixedly connected, the implant portion being embedded in the conical shaft, and the head contacting the base.

[0011] Furthermore, the tapered shaft is interference-fitted with the dial.

[0012] Furthermore, there is a gap between the conical shaft and the centering conical sleeve.

[0013] Furthermore, the screw surface is provided with a rough layer to increase friction during rotation.

[0014] Furthermore, the vibration sensor lateral sensitivity detection device also includes:

[0015] One end of the double-headed bolt is connected to the conical shaft, and the other end is connected to the sensor being tested.

[0016] Furthermore, the vibration sensor lateral sensitivity detection device also includes:

[0017] A washer is disposed on the contact surface between the screw head and the base. The washer is used to increase the contact area between the base and the screw and reduce the pressure on the screw base.

[0018] Furthermore, the base is tightly fitted with the centering cone sleeve.

[0019] Furthermore, the top surface of the main body is provided with a circular hole for mounting a standard sensor.

[0020] Furthermore, the base is provided with a plurality of first through holes, which are used to embed connectors so that the vibration sensor lateral sensitivity detection device and the vibration table are fixedly connected by the connectors.

[0021] Furthermore, this application also provides a sensor lateral sensitivity detection system, comprising:

[0022] As mentioned above, the vibration sensor lateral sensitivity detection device;

[0023] A vibration table, wherein the transverse sensitivity detection device of the vibration sensor is fixedly connected to the table surface of the vibration table;

[0024] The sensor under test is mounted on the conical shaft of the transverse sensitivity detection device for the vibration sensor and outputs an electrical signal amplitude.

[0025] A standard sensor is installed on a circular hole on the top surface of the main body of the vibration sensor lateral sensitivity detection device, and outputs the acceleration amplitude.

[0026] The host computer is connected to the transverse sensitivity detection device of the vibration sensor.

[0027] The beneficial effects of the present invention are mainly reflected in the fact that the transverse sensitivity detection device of the vibration sensor of the present invention adopts the uniaxial vibration excitation method and can realize transverse sensitivity measurement at any angle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the device used to measure lateral sensitivity using the uniaxial vibration excitation method in traditional schemes.

[0029] Figure 2 This is a schematic diagram of the structure of a vibration sensor lateral sensitivity detection device provided in an embodiment of this application.

[0030] Figure 3 This is a cross-sectional view of a vibration sensor lateral sensitivity detection device provided in an embodiment of this application.

[0031] Figure 4 An exploded view of a vibration sensor lateral sensitivity detection device provided in an embodiment of this application.

[0032] Figure 5 This is a side view of a vibration sensor lateral sensitivity detection device provided in an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the sensor under test installed in a vibration sensor lateral sensitivity detection device according to an embodiment of this application.

[0034] Figure label:

[0035] Base-1; Washer-2; Screw-3; Centering cone sleeve-4; Dial-5; Conical shaft-6;

[0036] Sensor under test - 7; Circular hole - 8; Through slot - 10; Double-ended bolt - 11

[0037] First through hole -12; main body -13, base -14, second through hole -15. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] This application provides a device for detecting the lateral sensitivity of a vibration sensor, used to detect the lateral sensitivity of the sensor under test.

[0040] Optionally, the vibration sensor lateral sensitivity detection device provided in this application can measure the lateral sensitivity of various vibration sensors. Optionally, the vibration sensor lateral sensitivity detection device provided in this application can measure the lateral sensitivity of piezoelectric vibration sensors.

[0041] like Figure 2 As shown, in one embodiment of this application, the vibration sensor lateral sensitivity detection device includes: a base 1, a washer 2, a centering cone sleeve 4, a cone shaft 6, a dial 5, and a screw 3.

[0042] The base 1 is an integral structure, comprising a main body 13 and a base 14. The main body 13 has an inner cavity. A centering conical sleeve 4 is attached to the inner wall of the inner cavity, and at least one centering conical sleeve 4 is provided. A conical shaft 6 passes through the inner cavity and abuts against the centering conical sleeve 4. When the vibration sensor lateral sensitivity detection device is in the detection state, the sensor under test 7 is fixedly connected to the conical shaft 6. A scale 5 is connected to the conical shaft 6. The surface of the scale 5 is engraved with multiple scale lines evenly divided into 360 degrees. The screw 3 includes an implantation part and a screw head. The implantation part and the screw head are fixedly connected. The implantation part is embedded in the conical shaft 6. The screw head contacts the washer 2.

[0043] In this embodiment, by configuring the cooperation between screw 3, centering cone sleeve 4, and cone shaft 6, the force generated when screw 3 is tightened inward manifests as pressure on cone shaft 6. Upon receiving this pressure, cone shaft 6 slightly opens centering cone sleeve 4, causing it to exert pressure on base 1 and thus hold it in place. At this time, neither cone shaft 6 nor centering cone sleeve 4 can rotate, achieving the effect of fixing cone shaft 6 and centering cone sleeve 4. When screw 3 is tightened outward, screw 3 loosens, and the pressure between cone shaft 6 and centering cone sleeve 4 disappears, resulting in a loose state. The scale 5 can then be rotated to rotate cone shaft 6 and the sensor under test 7 to the required adjustment angle. After determining the required adjustment angle, screw 3 is tightened to measure the lateral sensitivity of sensor under test 7 at that angle.

[0044] like Figure 2 As shown, in one embodiment of this application, the base 1 includes a main body 13 and a base 14.

[0045] The main body 13 is fixedly connected to the base 14. The main body 13 is a polygonal body with an inner cavity. At least two through slots 10 are provided on the main body 13, located above the inner cavity, to reduce the overall weight of the vibration sensor lateral sensitivity detection device. The base 14 is a quadrilateral body used to support the main body 13.

[0046] Specifically, a first through hole 12 is provided at each of the four ends near the base 14, and a round hole 8 is provided on the top surface of the main body 13.

[0047] Furthermore, the circular hole 8 can be a threaded hole for connecting a standard sensor after mounting a bolt. The standard sensor (not shown in the figure) is not the sensor being measured 7, but another sensor.

[0048] like Figure 2 As shown, in one embodiment of this application, the centering cone sleeve 4 is attached to the inner wall of the inner cavity.

[0049] At least one centering cone sleeve 4 is provided and located in the inner cavity. The outer cylindrical surface of the centering cone sleeve 4 abuts against the inner wall of the inner cavity, and there is a gap between the cone shaft 6 and the centering cone sleeve 4.

[0050] Specifically, the centering cone sleeve 4 is used to connect with the cone shaft 6 so that the cone shaft 6 and the centering cone sleeve 4 are locked when the screw is tightened inward.

[0051] like Figure 3 and Figure 4 As shown, in one embodiment of this application, the conical shaft 6 passes through the inner cavity and abuts against the centering conical sleeve 4. When the vibration sensor lateral sensitivity detection device is in the detection state, the sensor under test 7 is fixedly connected to the conical shaft 6.

[0052] The conical shaft 6 is located inside the centering conical sleeve 4, and the second through hole 15 is provided in the middle of the main body 13.

[0053] Specifically, when the screw is loosened outward, the conical shaft 6 and the centering conical sleeve 4 separate slightly, creating a small gap between them, which allows the conical shaft 6 to rotate. Rotating the dial 5 causes the conical shaft 6 and the sensor on it to rotate to the required angle. When the screw is tightened inward, the conical shaft 6 and the centering conical sleeve 4 are locked together and cannot rotate.

[0054] like Figure 2 As shown, in one embodiment of this application, the surface of the dial 5 is engraved with a plurality of scale lines evenly divided into 360 degrees.

[0055] The dial 5 and the conical shaft 6 are fixedly connected. The sensor under test and the conical shaft 6 are fixedly connected by screws 3. The rotation angle range of the dial 5 is 0 degrees to 360 degrees. The entire circumference of the dial 5 is divided into multiple large intervals and multiple small intervals. The large interval is a long scale line set every 10 degrees, and the distance between two adjacent long scale lines is equal. The small interval is a short scale line set every 1 degree, and the distance between two adjacent short scale lines is equal.

[0056] Specifically, the vibration sensor lateral sensitivity detection device in this embodiment has two sensors: a standard sensor (not shown in the figure), mounted on the circular hole 8, used to measure the acceleration amplitude generated by the up-and-down vibration of the vibration table; and a sensor under test 7, mounted on the conical shaft 6, used to measure the lateral sensitivity in different directions perpendicular to its mounting axis. Both sensors perform measurements simultaneously. When the scale 5 is rotated to the desired position, the scale 5 drives the conical shaft 6 and the sensor under test 7 connected to the conical shaft 6 to rotate together, thereby enabling the measurement of the lateral sensitivity of the sensor under test 7 in different directions perpendicular to its mounting axis. The sensor under test 7 is mounted along the X-axis and vibrates up and down with the vibration of the vibration table (vibrating along the Z-axis), generating a voltage output, i.e., the amplitude of the electrical signal.

[0057] The formulas for calculating the lateral sensitivity values ​​of the sensor 7 under test in each direction are as follows:

[0058]

[0059] Where ST represents the lateral sensitivity value of the sensor 7 under test in each direction perpendicular to the mounting axis. The amplitude of the electrical signal output by the sensor 7 under test. This is the acceleration amplitude output by the standard sensor.

[0060] like Figure 2 and Figure 5 As shown, in one embodiment of this application, the screw 3 includes an implantation portion and a screw head.

[0061] The screw 3 is an integral structure, the implantation part and the nail head are fixedly connected, the implantation part is embedded in the conical shaft 6, and the nail head is in contact with the base 1.

[0062] Specifically, the diameter of screw 3 is smaller than the width of the main body 13, and the surface of screw 3 is provided with a rough layer, which is a knurled treatment, to increase friction during use and thus achieve the effect of saving effort.

[0063] In addition, the screw 3 has a hollow part inside, which is circular. The hollow part is used to reduce the weight of the screw 3, so that the center of gravity of the entire device can be located in the middle of the device after installation.

[0064] like Figure 2 and Figure 3 As shown, in one embodiment of this application, the tapered shaft 6 is interference-fitted with the dial 5.

[0065] Specifically, the tapered shaft 6 and the dial 5 are interference fit, and when the screw 3 is tightened, the tapered shaft 6 and the dial 5 are in a fixed state.

[0066] like Figure 3 As shown, in one embodiment of this application, there is a certain gap between the conical shaft 6 and the centering conical sleeve 4.

[0067] Specifically, a certain gap is provided between the tapered shaft 6 and the centering tapered sleeve 4, so that it can move when the screw 3 is in a loosened state.

[0068] like Figure 3 As shown, in one embodiment of this application, the vibration sensor lateral sensitivity detection device further includes a double-headed bolt 11.

[0069] Specifically, one end of the double-ended bolt 11 is connected to the sensor under test 7, which is used to fix the sensor under test 7 to the conical shaft 6, and the other end of the double-ended bolt 11 is connected to the conical shaft 6.

[0070] like Figure 3 As shown, in one embodiment of this application, the vibration sensor lateral sensitivity detection device further includes a washer 2.

[0071] At least one washer 2 is provided, which is disposed on the contact surface between the screw head of the screw 3 and the base 1.

[0072] Specifically, the diameter of washer 2 is larger than the diameter of screw 3. One end face of washer 2 is in close contact with the surface of body 13, and the other end face of washer 2 is in close contact with the head of screw 3, in order to increase the contact area between screw 3 and body 13 and protect the surface of body 13.

[0073] like Figure 3 As shown, in one embodiment of this application, the base 1 and the centering cone sleeve 4 are in close contact.

[0074] The base 1 has a centering cone sleeve 4 in its inner cavity, and the outer cylindrical surface of the centering cone sleeve 4 abuts against the inner wall of the inner cavity.

[0075] like Figure 3 As shown, in one embodiment of this application, the top surface of the main body 13 is provided with a circular hole 8, which is used to install a standard sensor.

[0076] Specifically, when the vibration table is in operation, the standard sensor senses the vertical vibration of the vibration table (vibration in the Z-axis direction) and outputs the acceleration amplitude.

[0077] like Figure 2 As shown, in one embodiment of this application, the base 14 is provided with a plurality of first through holes 12, the first through holes 12 being used to embed connectors so that the vibration sensor lateral sensitivity detection device and the vibration table are fixedly connected by the connectors.

[0078] The process of detecting the lateral sensitivity of the vibration sensor 7 using the lateral sensitivity detection device provided in this application is as follows: By setting the fit between the screw 3, washer 2, centering cone sleeve 4, and cone shaft 6, when the screw 3 is tightened inward, the washer 2 moves inward a small distance until it reaches the cone shaft 6. After receiving this pressure, the cone shaft 6 moves inward relative to the centering cone sleeve 4, thus slightly opening the centering cone sleeve 4. This allows the centering cone sleeve 4 to exert pressure on the base 1, thus holding the base 1 in place. At this time, neither the cone shaft 6 nor the centering cone sleeve 4 can rotate, achieving the effect of fixing the cone shaft 6 and the centering cone sleeve 4. When the screw 3 is tightened outward, the screw 3 loosens, and the cone shaft 6 moves outward relative to the centering cone sleeve 4. At this time, there is a certain gap between the centering cone sleeve 4 and the cone shaft 6, and the pressure between the cone shaft 6 and the centering cone sleeve 4 disappears. At this time, it is in a loose state, and the scale 5 can be rotated to drive the cone shaft 6 and the sensor 7 under test to rotate to the required adjustment angle. After determining the required adjustment angle, tighten screw 3 to measure the lateral sensitivity of the sensor 7 under test at that angle.

[0079] This application also provides a sensor lateral sensitivity detection system.

[0080] In one embodiment of this application, the sensor lateral sensitivity detection system includes:

[0081] The vibration sensor lateral sensitivity detection device mentioned in the foregoing embodiments.

[0082] A vibration table, wherein the transverse sensitivity detection device of the vibration sensor is fixedly connected to the table surface.

[0083] The sensor under test 7 is mounted on the conical shaft 6 of the transverse sensitivity detection device of the vibration sensor and outputs an electrical signal amplitude.

[0084] A standard sensor is installed on the circular hole 8 on the top surface of the main body 13 of the vibration sensor lateral sensitivity detection device, and outputs the acceleration amplitude.

[0085] The host computer is connected to the transverse sensitivity detection device of the vibration sensor.

[0086] Specifically, when measuring the lateral sensitivity, first loosen screw 3, rotate the scale 5 to the desired measurement angle, and then tighten screw 3 to fix it. Install the device on the vibration table through the first through hole 12. When in working condition, the vibration table moves up and down, and the standard sensor outputs the amplitude of the acceleration of the vibration table during the up and down movement, which is recorded as the acceleration amplitude of the standard sensor when it is excited perpendicular to its mounting axis. When the sensor under test 7 senses an acceleration excitation along the Z-axis, the sensor outputs a voltage signal, which is recorded as the amplitude of the electrical signal. The experiment was repeated multiple times, and the angle was adjusted for measurement. The magnitude and direction of the maximum lateral sensitivity, as well as the magnitude and direction of the minimum lateral sensitivity, were calculated by the host computer.

[0087] This application also provides a method for detecting the lateral sensitivity of a sensor.

[0088] In one embodiment of this application, the sensor lateral sensitivity detection method is applied to the sensor lateral sensitivity detection system mentioned above.

[0089] The sensor lateral sensitivity detection method includes:

[0090] S100, the transverse sensitivity detection device of the vibration sensor is installed on the table surface of the vibration table, the sensor to be tested 7 is installed on the conical shaft 6 of the transverse sensitivity detection device of the vibration sensor, and the standard sensor is installed at the circular hole 8 on the top surface of the transverse sensitivity detection device of the vibration sensor.

[0091] S200 controls the vibration table to vibrate up and down (vibrate along the Z-axis). By adjusting the various angles of the scale 5 around the circumference, the electrical signal output of the sensor under test 7 in different angular directions is measured, as well as the acceleration amplitude output of the standard sensor is measured.

[0092] Specifically, by adjusting the rotating screw 3, the fit between the tapered shaft 6 and the tapered sleeve 4 is loosened, and then the angle can be adjusted by rotating the dial 5.

[0093] S300 repeats S200 multiple times, recording each angle of rotation around the circumference and the corresponding electrical signal, and sends it to the host computer.

[0094] S400, the host computer analyzes the various angles of rotation around the circumference and the corresponding electrical signals to obtain the detection data of the transverse sensitivity detection device of the vibration sensor. Based on the detection data of the transverse sensitivity detection device of the vibration sensor, the transverse sensitivity of the sensor under test in each direction is calculated using Formula 1.

[0095]

[0096] Among them, S T The values ​​represent the lateral sensitivity values ​​of the sensor 7 under test in each direction perpendicular to the mounting axis. The amplitude of the electrical signal output by the sensor 7 under test. This is the acceleration amplitude output by the standard sensor.

[0097] The mounting axis mentioned in this application refers to the axis perpendicular to the mounting surface of the sensor 7 under test. The sensing axis mentioned in this application refers to the direction in which the sensor 7 under test produces the maximum response to changes in vibration.

[0098] The S500, a host computer, generates a graph showing the change in electrical signal amplitude at various angles of rotation around a circle, records the direction and magnitude of the maximum lateral sensitivity, and records the direction and magnitude of the minimum lateral sensitivity.

[0099] The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A device for detecting the lateral sensitivity of a vibration sensor, used to detect the lateral sensitivity of the sensor under test, characterized in that, The vibration sensor lateral sensitivity detection device includes: The base includes a main body and a base, the main body and the base are fixedly connected, and the main body is provided with an inner cavity; A centering cone sleeve is attached to the inner wall of the inner cavity, and there is at least one centering cone sleeve; A conical shaft passes through the inner cavity and abuts against a centering conical sleeve; when the vibration sensor lateral sensitivity detection device is in the detection state, the sensor under test is fixedly connected to the conical shaft; A dial, connected to a conical shaft, has multiple graduation lines evenly divided into 360 degrees engraved on its surface; The screw includes an implant portion and a head, the implant portion and the head being fixedly connected, the implant portion being embedded in the conical shaft, and the head contacting the base.

2. The vibration sensor lateral sensitivity detection device according to claim 1, characterized in that, The tapered shaft is interference-fitted with the dial.

3. The vibration sensor lateral sensitivity detection device according to claim 2, characterized in that, There is a gap between the conical shaft and the centering conical sleeve.

4. The vibration sensor lateral sensitivity detection device according to claim 1, characterized in that, The screw surface has a rough layer to increase friction during rotation.

5. The vibration sensor lateral sensitivity detection device according to claim 4, characterized in that, Also includes: One end of the double-ended bolt is connected to the conical shaft, and the other end is connected to the sensor being tested.

6. The vibration sensor lateral sensitivity detection device according to claim 1, characterized in that, Also includes: A washer is disposed on the contact surface between the screw head and the base. The washer is used to increase the contact area between the base and the screw and reduce the pressure of the screw on the base.

7. The vibration sensor lateral sensitivity detection device according to claim 6, characterized in that, The base is in close contact with the centering cone sleeve.

8. The vibration sensor lateral sensitivity detection device according to claim 7, characterized in that, The top surface of the main body is provided with a circular hole for mounting a standard sensor.

9. The vibration sensor lateral sensitivity detection device according to claim 8, characterized in that, The base is provided with a plurality of first through holes, which are used to embed connectors so that the transverse sensitivity detection device of the vibration sensor is fixedly connected to the vibration table through the connectors.

10. A sensor lateral sensitivity detection system, characterized in that, Includes the transverse sensitivity detection device for vibration sensors as described in any one of claims 1 to 9; A vibration table, wherein the transverse sensitivity detection device of the vibration sensor is fixedly connected to the table surface of the vibration table; The sensor under test is mounted on the conical shaft of the transverse sensitivity detection device for the vibration sensor and outputs an electrical signal amplitude. A standard sensor is installed on a circular hole on the top surface of the main body of the vibration sensor lateral sensitivity detection device, and outputs the acceleration amplitude. The host computer is connected to the transverse sensitivity detection device of the vibration sensor.

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