Detection device for sensor

Abstract

The invention discloses a detection device for a sensor. The detection device comprises a base; the driving device is arranged on the base, and the driving device is provided with an output shaft; the sensor is arranged on the base, a detection hole coaxial with the output shaft is formed in the sensor, and the sensor obtains a corresponding electric signal according to the position of an object to be detected in the detection hole; the pivoting piece is connected with the output shaft and accommodated in the detection hole, and the pivoting piece is eccentrically arranged relative to the output shaft; the sensor is provided with a detection head which is used for detecting the distance between the sensor and the outer surface of the pivoting piece in the radial direction. According to the detection device, the driving device drives the pivoting piece to do eccentric motion in the sensor detection hole, and the detection head can detect the distance between the detection head and the outer surface of the pivoting piece in the radial direction, so that the angle deviation during manual positioning direction measurement is eliminated; therefore, the sensitivity of the sensor, the measurement accuracy of the offset of the central point and the automation level of detection are improved.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology detection, and in particular to a detection device for a sensor. Background Art

[0002] In the related art, the sensor used for rotor detection has two important indicators, namely sensitivity and center point offset.

[0003] The traditional way to detect sensor sensitivity is to select several points at fixed distances in the X and Y directions, measure the corresponding voltage feedback values ​​at the points at fixed distances, and then calculate the sensitivity through methods such as linear regression. The traditional way to detect the center point offset is to manually find the starting point and the ending point in the X and Y directions, and then take the middle point as the center point to calculate the offset. In traditional tests, manual positioning is required to determine the X and Y directions. Manual positioning may cause angle deviation, thereby causing measurement errors and reducing the accuracy of the sensitivity detection structure. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a detection device for a sensor. According to the detection device of the present invention, a driving device drives a pivot member to perform eccentric movement in a sensor detection hole, and a detection head can detect the distance between the pivot member and the outer surface of the pivot member in the radial direction, thereby eliminating the angle deviation during manual positioning direction measurement, thereby improving the sensitivity of the sensor and the accuracy of the center point offset measurement and the automation level of the detection.

[0005] The detection device for the sensor according to the present invention comprises: a base; a driving device, which is arranged on the base and is provided with an output shaft; a sensor, which is arranged on the base and is formed with a detection hole coaxially arranged with the output shaft, and the sensor obtains a corresponding electrical signal according to the position of the object to be detected in the detection hole; a pivot member, which is connected to the output shaft and accommodated in the detection hole, and the pivot member is eccentrically arranged relative to the output shaft; wherein the sensor is provided with a detection head, and the detection head is used to detect the distance between the sensor and the outer surface of the pivot member in the radial direction.

[0006] The sensor detection device according to the present invention drives the pivot member to perform eccentric movement in the detection hole through the driving device, and the detection head can detect the distance from the detection head to the outer surface of the pivot member. Since each distance will generate a corresponding voltage value, the relationship between the change of distance and voltage is linear. Therefore, the sensitivity is obtained by dividing the voltage difference by the distance, thereby realizing the automatic detection of the sensor sensitivity and eliminating the angular deviation during manual positioning direction measurement, thereby improving the accuracy of the sensor sensitivity and the center point offset measurement.

[0007] According to some embodiments of the present invention, the sensor includes: a first shell, which is arranged on the base and has a ring-shaped structure; a second shell, which is connected to the first shell and is located radially inside the first shell, the detection hole is formed on the second shell, and the detection head is provided on the inner wall of the detection hole.

[0008] According to some embodiments of the present invention, the first shell and the second shell are spaced apart to form an installation space; wherein the sensor further comprises: a signal terminal, which is arranged in the first shell; and a detection head circuit board, which is accommodated in the installation space and electrically connects the signal terminal with the detection head.

[0009] According to some embodiments of the present invention, the sensor further includes: an annular substrate, the first shell being arranged at the radial outer edge of a surface of one side of the annular substrate, the second shell being arranged at the radial inner edge of the annular substrate, the annular substrate, the first shell and the second shell being integrally formed and defining the installation space.

[0010] According to some embodiments of the present invention, a communication groove connected to the installation space is formed on the first shell, and at least a portion of the signal terminal is received in the communication groove and connected to the detection head circuit board.

[0011] According to some embodiments of the present invention, the sensor further comprises: a protective layer, wherein the protective layer is disposed in the groove and covers at least a side of the circuit board facing away from the annular substrate.

[0012] According to some embodiments of the present invention, the detection device further includes: a bracket, which is arranged on the base, and a receiving hole is formed on the bracket, and the sensor is embedded in the receiving hole; an adjusting member, which is arranged between the sensor and the bracket, and the adjusting member can be selectively arranged at any position on the circumference of the sensor to adjust the position of the sensor relative to the bracket.

[0013] According to some embodiments of the present invention, the adjustment member is configured as a gasket and is received between an outer peripheral wall of the sensor and an inner wall of the accommodating hole.

[0014] According to some embodiments of the present invention, a mounting hole for connecting with the bracket is formed on the end surface of the first shell.

[0015] According to some embodiments of the present invention, a notch is formed on the radial outer periphery of the second shell, and the notch is used for installing the detection head.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a side view of a detection device according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a pivot member at maximum displacement according to an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a pivot member at a minimum displacement according to an embodiment of the present invention;

[0021] Figure 4 is a top view of a sensor according to an embodiment of the present invention.

[0022] Reference numerals:

[0023] 100. Detection device;

[0024] 11. sensor; 12. pivot member; 13. drive device; 14. base;

[0025] 101, detection hole; 21, first shell; 22, second shell; 23, installation space; 24, notch;

[0026] 25. Signal terminal; 26. Mounting hole. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the related art, the sensor used for rotor detection has two important indicators, namely sensitivity and center point offset.

[0029] The traditional way to detect sensor sensitivity is to select several points at fixed distances in the X and Y directions, measure the corresponding voltage feedback values ​​at the points at fixed distances, and then calculate the sensitivity through methods such as linear regression. The traditional way to detect the center point offset is to manually find the starting point and the ending point in the X and Y directions, and then take the middle point as the center point to calculate the offset. In traditional tests, manual positioning is required to determine the X and Y directions. Manual positioning may cause angle deviation, thereby causing measurement errors and reducing the accuracy of the sensitivity detection structure.

[0030] Reference below Figure 1-Figure 4 A detection device for a sensor according to an embodiment of the present invention is described.

[0031] The detection device 100 for the sensor 11 according to the present invention comprises: a base 14, a driving device 13, a sensor 11 and a pivot member 12; the driving device 13 is arranged on the base 14, and the driving device 13 is provided with an output shaft; the sensor 11 is arranged on the base 14 and the sensor 11 is formed with a detection hole 101 which is coaxially arranged with the output shaft, and the sensor 11 obtains a corresponding electrical signal according to the position of the object to be detected in the detection hole 101; the pivot member 12 is connected to the output shaft and is accommodated in the detection hole 101, and the pivot member 12 is eccentrically arranged relative to the output shaft; wherein the sensor 11 is provided with a detection head, and the detection head is used to detect the distance between the outer surface of the pivot member 12 in the radial direction.

[0032] In some specific embodiments, the detection device 100 of the sensor 11 is composed of a base 14, a driving device 13, a sensor 11 and a pivot member 12. The detection device 100 can measure the sensitivity and center point offset of the sensor 11 used for rotor detection. The driving device 13 and the sensor 11 are respectively arranged on the base 14. A detection hole 101 is formed on the sensor 11, and an output shaft is formed on the driving device 13. The pivot member 12 is received in the detection hole 101 and connected to the output end of the driving device 13, and the pivot member 12 is eccentrically arranged with the output end, and the axis of the detection hole 101 coincides with the axis of the output end to ensure the detection accuracy of the center point offset. The center point offset is the distance between the center of the detection hole 101 and the center of the pivot member 12. In an ideal state, the error is 0, that is, the rotor and the sensor 11 are coaxially arranged, and the detection hole 101, the output end and the pivot member 12 are coaxially arranged;

[0033] The sensor 11 is provided with a detection head, which can detect the distance between the sensor 11 and the outer surface of the pivot member 12 in the radial direction. When the driving device 13 drives the pivot member 12 to move eccentrically in the detection hole 101, the pivot member 12 rotates one circle, and the detection head can detect the minimum distance X1 and the maximum distance X2 between the detection head and the outer surface of the pivot member 12.

[0034] X1 and X2 respectively satisfy the following relationship: X1=R-R2, X2=2*R3-2*R1-(R3-R2)=R3-2*R1+R2, R1 is the radius of the pivot member 12, R2 is the detection radius of the sensor 11, that is, the radius of the eccentric motion trajectory of the pivot member 12, and R3 is the radius of the detection hole 101. Each distance corresponds to a voltage value, and the relationship between the change of distance and voltage is linear. Therefore, the sensitivity is obtained by dividing the voltage difference by the distance, thereby realizing the automatic detection of the sensitivity of the sensor 11 and eliminating the angular deviation during manual positioning direction measurement, thereby improving the accuracy of the sensitivity and center point offset measurement of the sensor 11. In addition, the present application can also calculate the actual displacement of the pivot member 12 and the sensor 11 in each direction by controlling the rotation angle of the drive device 13, and thereby calculate the sensitivity. Theoretically, the value data for calculating the sensitivity can be infinite, thereby further improving the accuracy of the sensitivity detection of the sensor 11.

[0035] According to the sensor 11 detection device 100 of the present invention, the pivot member 12 is driven to perform eccentric movement in the detection hole 101 by the driving device 13. The detection head can detect the distance from the detection head to the outer surface of the pivot member 12. Since each distance will generate a corresponding voltage value, the relationship between the distance and the voltage change is linear. Therefore, the sensitivity is obtained by dividing the voltage difference by the distance, thereby realizing the automatic detection of the sensitivity of the sensor 11 and eliminating the angular deviation during manual positioning direction measurement, thereby improving the accuracy of the sensor 11 sensitivity and the center point offset measurement.

[0036] According to some embodiments of the present invention, the sensor 11 includes: a first shell 21 and a second shell 22, the first shell 21 is arranged on the base 14, and the first shell 21 is constructed in a ring shape; the second shell 22 is connected to the first shell 21 and is located on the radial inner side of the first shell 21, and a detection hole 101 is formed on the second shell 22, and a detection head is arranged on the inner wall of the detection hole 101.

[0037] In some specific embodiments, a first shell 21 and a second shell 22 connected to each other are provided in the sensor 11. The first shell 21 is constructed in a circular ring shape and is connected to the base 14, thereby fixing the sensor 11 to the base 14 and improving the stability of the sensor 11 on the base 14. The second shell 22 is located on the radial inner side of the first shell 21. A detection hole 101 is provided on the second shell 22. A detection head is provided on the second shell 22 to measure the distance between the detection head and the outer surface of the pivot member 12.

[0038] According to some embodiments of the present invention, the first shell 21 and the second shell 22 are spaced apart to form an installation space 23; wherein the sensor 11 further includes: a signal terminal 25 and a detection head circuit board, the signal terminal 25 is arranged in the first shell 21; the detection head circuit board is accommodated in the installation space 23 and electrically connects the signal terminal 25 with the detection head.

[0039] In some specific embodiments, a signal terminal 25 and a detection head circuit board are also provided in the sensor 11. The signal terminal 25 is provided on the first shell 21. The signal terminal 25 is an electrical interface between the sensor 11 and other external devices, and is used to transmit the electrical signal generated by the detection head circuit board inside the sensor 11 to an external data acquisition system, controller or other processing equipment. At the same time, if the sensor 11 requires external power supply, the signal terminal 25 may also provide a power input function.

[0040] The first shell 21 and the second shell 22 are radially spaced apart and form an installation space 23. The detection head circuit board is arranged in the installation space 23. The detection head circuit board is responsible for processing the distance data detected by the detection head and converting it into a standard electrical signal that can be output. The detection head circuit board can also amplify and filter the signal to ensure the quality and stability of the output signal. In addition, the detection head circuit board electrically connects the signal terminal 25 with the detection head part through appropriate wiring to ensure that the signal can be smoothly transmitted to the external device.

[0041] The first shell 21 and the second shell 22 together define a relatively stable installation space 23, which provides physical protection for the detection head circuit board inside, prevents dust, moisture and other environmental factors from affecting the detection head circuit board, and improves the reliability and service life of the sensor 11.

[0042] According to some embodiments of the present invention, the sensor 11 also includes: an annular substrate, a first shell 21 is arranged at the radial outer edge of one side surface of the annular substrate, a second shell 22 is arranged at the radial inner edge of the annular substrate, and the annular substrate, the first shell 21 and the second shell 22 are integrally formed and define an installation space 23.

[0043] In some specific embodiments, an annular substrate is further provided in the sensor 11. The annular substrate is the basic component of the entire sensor 11. One side surface of the annular substrate is used to install the first shell 21 and the second shell 22. The radial outer edge of the annular substrate is provided with the first shell 21, and the radial inner edge of the annular substrate is provided with the second shell 22. The annular substrate, the first shell 21 and the second shell 22 are integrally formed, which means that they are processed as a whole during the manufacturing process. This design can enhance the integrity and mechanical strength of the sensor 11 structure, reduce errors in the assembly process, and improve assembly accuracy. The annular substrate, the first shell 21 and the second shell 22 jointly define an installation space 23. The installation space 23 can be used to accommodate the detection head circuit board and other necessary electronic components, and ensure that these sensitive components are effectively protected.

[0044] According to some embodiments of the present invention, a connecting groove with the installation space 23 is formed on the first shell 21, and at least a portion of the signal terminal 25 is accommodated in the connecting groove and connected to the detection head circuit board. The connecting groove allows the signal terminal 25 to be electrically connected to the detection head circuit board in the installation space 23, thereby ensuring that the electrical signal generated by the sensor 11 can be smoothly transmitted from the signal terminal 25 to the external device. Partially accommodating the signal terminal 25 in the connecting groove can make the overall design of the sensor 11 more compact, reduce unnecessary external wiring, and improve the overall integration of the sensor 11. At the same time, the design of the connecting groove simplifies the connection process between the signal terminal 25 and the detection head circuit board, which helps to improve the assembly efficiency of the sensor 11. If the installation space 23 needs to be repaired or parts replaced, the connecting groove makes it easier and more convenient to access the detection head circuit board in the installation space 23.

[0045] According to some embodiments of the present invention, the sensor 11 further includes: a protective layer, which is disposed in the installation space 23 and at least covers a side of the detection head circuit board away from the annular substrate.

[0046] In some specific embodiments, a protective layer is further provided in the sensor 11. The protective layer fills the installation space 23 and completely covers the side of the detection head circuit board facing away from the annular substrate. The protective layer can provide physical protection for the detection head circuit board in the installation space 23 to prevent the sensor 11 from being damaged due to vibration, impact or other mechanical stresses. At the same time, the protective layer can also prevent moisture, dust and other pollutants or corrosive substances from invading the installation space 23, thereby extending the service life of the detection head circuit board and improving the long-term operation stability and reliability of the sensor 11.

[0047] In addition, the protective layer has good insulation properties and can effectively isolate the detection head circuit board from other components to avoid the risk of short circuit, thereby improving the safety and reliability of the sensor 11.

[0048] According to some embodiments of the present invention, the detection device 100 further includes: a bracket and an adjusting member, the bracket being arranged on the base 14, a receiving hole being formed on the bracket, and the sensor 11 being embedded in the receiving hole; the adjusting member being arranged between the sensor 11 and the bracket, and the adjusting member being selectively arranged at any position around the sensor 11 to adjust the position of the sensor 11 relative to the bracket.

[0049] In some specific embodiments, the bracket is arranged and fixed on the base 14, and a receiving hole is formed on the bracket. The sensor 11 is embedded in the receiving hole. The receiving hole can ensure that the sensor 11 can be firmly mounted on the bracket and can keep the sensor 11 and the driving device 13 in the correct relative position. An adjustment member is also provided between the outer surface of the first shell 21 of the sensor 11 and the inner wall of the receiving hole. The adjustment member can be selectively provided at any position around the sensor 11 to adjust the position of the sensor 11 relative to the bracket. This design allows fine-tuning of the position of the sensor 11 so that the axis of the sensor 11 coincides with the axis of the driving device 13, thereby ensuring the detection accuracy of the center point offset.

[0050] According to some embodiments of the present invention, the adjustment member is configured as a gasket and is received between the outer peripheral wall of the sensor 11 and the inner wall of the accommodating hole.

[0051] In some specific embodiments, the adjusting member can be constructed as a micron-sized gasket. By adding or removing gaskets of different thicknesses between the outer peripheral wall of the sensor 11 and the inner wall of the accommodating hole, the relative position relationship between the axis of the sensor 11 and the output shaft of the driving device 13 can be accurately adjusted to ensure that the axis of the sensor 11 coincides with the axis of the output shaft of the driving device 13, thereby ensuring the detection accuracy of the center point offset.

[0052] In addition, the gasket can also help fix the position of the sensor 11 by filling the gap between the sensor 11 and the receiving hole to prevent the sensor 11 from moving due to vibration or other external factors during operation, thereby improving the consistency and stability of the measurement.

[0053] According to some embodiments of the present invention, a mounting hole 26 for connecting with a bracket is formed on the end surface of the first housing 21 .

[0054] In some specific embodiments, the mounting hole 26 can be constructed as a top screw hole, and the sensor 11 is assembled into the bracket by means of a heat sleeve. Since the first shell 21 of the sensor 11 is installed when the bracket is at a high temperature, when the temperature of the bracket drops, the bracket will shrink and fix the first shell 21, making it difficult to remove the first shell 21 from the bracket. Therefore, a top screw hole is provided on the end face of the first shell 21, and the top screw hole can be used as an additional leverage point. By screwing a screw into the top screw hole, the screw applies a radial pressure to the first shell 21 during the installation process. On the one hand, this pressure can be used to fine-tune the relative position between the sensor 11 and the bracket to ensure the accuracy of the sensor installation position. On the other hand, this pressure can help the sensor 11 to be pushed out from its installation position, thereby improving the convenience of disassembling the sensor 11.

[0055] According to some embodiments of the present invention, a notch 24 is formed on the radial periphery of the second shell 22. The notch 24 is used for installing the detection head. The notch 24 provides a clear installation position for the detection head, ensuring that the detection head can be accurately placed at the required position. If the detection head needs to be replaced or maintained, the notch 24 design makes it easier to remove and reinstall the detection head from the second shell 22, thereby improving the convenience of maintenance and inspection of the sensor 11.

[0056] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In the description of the present invention, "first feature" or "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more.

[0058] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0059] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0060] In the description of this specification, reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention.

[0061] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A detection device for a sensor, characterized in that: include: Base (14); A driving device (13), wherein the driving device (13) is arranged on the base (14), and the driving device (13) is provided with an output shaft; A sensor (11), wherein the sensor (11) is arranged on the base (14) and the sensor (11) is formed with a detection hole (101) arranged coaxially with the output shaft, and the sensor (11) obtains a corresponding electrical signal according to the position of the object to be detected in the detection hole (101); A pivoting member (12), the pivoting member (12) is connected to the output shaft and received in the detection hole (101), the pivoting member (12) is eccentrically arranged relative to the output shaft; wherein The sensor (11) is provided with a detection head, and the detection head is used to detect the distance between the sensor (11) and the outer surface of the pivoting member (12) in the radial direction.

2. The detection device for a sensor according to claim 1, characterized in that: The sensor (11) comprises: A first shell (21), wherein the first shell (21) is disposed on the base (14), and the first shell (21) is configured in a ring shape; A second shell (22), the second shell (22) is connected to the first shell (21) and is located radially inward of the first shell (21), the detection hole (101) is formed on the second shell (22), and the detection head is provided on the inner wall of the detection hole (101).

3. The detection device for a sensor according to claim 2, characterized in that: The first shell (21) and the second shell (22) are spaced apart to form an installation space (23); in The sensor (11) further comprises: A signal terminal (25), the signal terminal (25) being arranged on the first housing (21); A detection head circuit board is housed in the installation space (23) and electrically connects the signal terminal (25) to the detection head.

4. The detection device for a sensor according to claim 3, characterized in that: The sensor (11) further comprises: An annular substrate, wherein the first shell (21) is arranged at the radial outer edge of one side surface of the annular substrate, and the second shell (22) is arranged at the radial inner edge of the annular substrate, and the annular substrate, the first shell (21) and the second shell (22) are integrally formed and define the installation space (23).

5. The detection device for a sensor according to claim 4, characterized in that: A communicating groove with the installation space (23) is formed on the first housing (21), and at least a portion of the signal terminal (25) is accommodated in the communicating groove and connected to the detection head circuit board.

6. The detection device for a sensor according to claim 4, characterized in that: The sensor (11) further comprises: a protective layer, which is arranged in the installation space (23) and covers at least one side of the detection head circuit board away from the annular substrate.

7. The detection device for a sensor according to claim 2, characterized in that: Also includes: A bracket, the bracket being arranged on the base (14), the bracket being formed with a receiving hole, the sensor (11) being embedded in the receiving hole; An adjusting member is arranged between the sensor (11) and the bracket, and the adjusting member can be selectively arranged at any position on the circumference of the sensor (11) to adjust the position of the sensor (11) relative to the bracket.

8. The detection device for a sensor according to claim 7, characterized in that: The adjusting member is constructed as a gasket and is accommodated between the outer peripheral wall of the sensor (11) and the inner wall of the accommodating hole.

9. The detection device for a sensor according to claim 7, characterized in that: The end surface of the first shell (21) is formed with a mounting hole (26) for connecting with the bracket.

10. The detection device for a sensor according to claim 2, characterized in that: A notch (24) is formed on the radial outer periphery of the second shell (22), and the notch (24) is used for installing the detection head.

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