Probe assembly for sensor and sensor

Abstract

The utility model discloses a probe assembly for a sensor and the sensor, and the probe assembly comprises a core body which extends in the axial direction; the first shell is arranged on the peripheral wall of the core body in a sleeving manner; the second shell is arranged on the peripheral wall of the core body in a sleeving mode, and the second shell and the first shell are arranged in a spaced mode in the axial direction; the coil is arranged on the peripheral wall of the core body in a sleeving mode and located between the first shell and the second shell, and the two ends, in the axial direction, of the coil abut against the first shell and the second shell respectively; and at least one of the first shell and the second shell is suitable for being connected with the core body after the first shell and the second shell keep a preset distance. According to the probe assembly for the sensor, inductance and resistance values can be adjusted when the probe assembly is assembled, and the measurement accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sensors, in particular to a probe assembly for a sensor and a sensor. BACKGROUND

[0002] In the related art, an eddy current sensor is applied to a turbo molecular pump. The main function of the eddy current sensor is to monitor the vibration and displacement of the rotor in real time. To this end, the eddy current sensor needs to have good static characteristics and high dynamic response characteristics. The eddy current sensor detects through a probe. The existing probe is usually of an integral structure. The space reserved for the coil winding is fixed. Therefore, the thickness of the coil cannot be adjusted during processing. As a result, the performance of the eddy current sensor cannot meet the requirements in multiple scenarios. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a probe assembly for a sensor, which can adjust the inductance and resistance value during assembly to improve the accuracy of measurement.

[0004] The present application also provides a sensor with the above probe assembly.

[0005] The probe assembly for a sensor according to an embodiment of the present application comprises a core body extending along an axial direction, a first shell body sleeved on the outer peripheral wall of the core body, a second shell body sleeved on the outer peripheral wall of the core body and arranged axially spaced apart from the first shell body, and a coil sleeved on the outer peripheral wall of the core body and located between the first shell body and the second shell body, the two ends of the coil along the axial direction abutting against the first shell body and the second shell body respectively, wherein at least one of the first shell body and the second shell body is adapted to be connected with the core body after the first shell body and the second shell body maintain a preset distance.

[0006] The probe assembly for a sensor according to an embodiment of the present application has a core body and a first shell body, a coil and a second shell body which are sequentially sleeved on the outer peripheral wall of the core body along the axial direction. At least one of the first shell body and the second shell body can be connected with the core body after the first shell body and the second shell body maintain a preset distance. Therefore, the distance between the first shell body and the second shell body can be adjusted before winding during assembly of the probe assembly, so as to adjust the thickness of the coil, improve the response speed and accuracy of the sensor, and meet the performance requirements.

[0007] In some embodiments of the present application, at least one of the first shell body and the second shell body is provided with a limiting part adapted to be connected with the core body after the first shell body and the second shell body maintain a preset distance.

[0008] In some embodiments of the present application, the limiting part is an adhesive layer, which is attached to and fixed with at least part of the outer peripheral wall of the core.

[0009] In some embodiments of the present application, the outer peripheral wall of the core is formed with a cooperating part cooperating with the limiting part.

[0010] In some embodiments of the present application, the second shell is formed with an avoiding part penetrating through in the radial direction and extending in the axial direction, which is adapted to avoid part of the coil.

[0011] In some embodiments of the present application, the probe assembly further comprises:

[0012] a sealing member, which is sleeved on the outer periphery of the coil and located between the first shell and the second shell, and connected with the first shell and the second shell respectively.

[0013] In some embodiments of the present application, the side of the sealing member towards the second shell is formed with an extending part extending in the axial direction, which is accommodated in the avoiding part and connected with the inner wall of the avoiding part.

[0014] In some embodiments of the present application, the material of the sealing member is resin.

[0015] In some embodiments of the present application, the outer diameter of the first shell, the outer diameter of the second shell and the outer diameter of the sealing member are the same.

[0016] The sensor of the embodiments of the present application is described below.

[0017] The sensor according to the embodiments of the present application is provided with the probe assembly of the above-mentioned embodiments. Since the sensor according to the embodiments of the present application is provided with the probe assembly of the above-mentioned embodiments, the distance between the first shell and the second shell of the probe assembly of the sensor can be adjusted in advance before winding during assembly, so as to adjust the thickness of the coil, improve the response speed and accuracy of the sensor, and meet the performance requirements.

[0018] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a structural schematic view of a probe assembly for a sensor according to the embodiments of the present application;

[0021] Figure 2 is Figure 1 exploded schematic view of a probe assembly;

[0022] Figure 3 is Figure 1 partial structural schematic view of a probe assembly.

[0023] Reference Signs:

[0024] 10, probe assembly; 11, core; 12, first housing;

[0025] 13, second housing; 131, limiting portion; 132, avoiding portion; 14, coil; 15, sealing member; 151, extension. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0027] Reference is made below to Figures 1-3 A probe assembly 10 for a sensor according to an embodiment of the present application is described below, which comprises a core 11, a first housing 12, a second housing 13 and a coil 14.

[0028] The core 11 extends in an axial direction. The first housing 12 is sleeved on an outer peripheral wall of the core 11. The second housing 13 is sleeved on the outer peripheral wall of the core 11 and is arranged axially spaced apart from the first housing 12. The coil 14 is sleeved on the outer peripheral wall of the core 11 and is located between the first housing 12 and the second housing 13, and both ends of the coil 14 in the axial direction abut against the first housing 12 and the second housing 13, respectively. At least one of the first housing 12 and the second housing 13 is adapted to be connected to the core 11 after the first housing 12 and the second housing 13 maintain a predetermined distance.

[0029] At present, an eddy current sensor is applied to a turbomolecular pump. The main function of the eddy current sensor is to monitor parameters such as vibration and displacement of a rotor in real time. For this purpose, the eddy current sensor needs to have good static characteristics and high dynamic response characteristics. The eddy current sensor detects through a probe. The existing probe is usually of a whole structure. The space reserved for coil winding is fixed. Therefore, the thickness of the coil cannot be adjusted during processing, which leads to the fact that the performance of the eddy current sensor is difficult to meet the demand in multiple scenarios.

[0030] Specifically, as Figure 1 and Figure 2As shown, the probe assembly 10 can include a core 11, a shell, and a coil 14. The core 11 can extend in an axial direction. In some embodiments, the core 11 can be a cylinder. The material of the core 11 can be selected as needed according to the use scenario. For example, when the use scenario requires a probe assembly 10 with high inductance, the core 11 can be made of a magnetically conductive material. When the use scenario requires low inductance, the core 11 can be made of a non-magnetic material.

[0031] The shell can include a first shell 12 and a second shell 13. The first shell 12 can be sleeved on the outer peripheral wall of the core 11 and can be arranged close to the detection end of the core 11. The second shell 13 can be sleeved on the outer peripheral wall of the core 11. The second shell 13 and the first shell 12 can be arranged at a distance in the axial direction. The coil 14 can be sleeved on the outer peripheral wall of the core 11 and can be located between the first shell 12 and the second shell 13. The two ends of the coil 14 in the axial direction abut against the first shell 12 and the second shell 13, respectively, thereby limiting the movement of the coil 14 in the axial direction.

[0032] Further, at least one of the first shell 12 and the second shell 13 can be connected to the core 11 after the first shell 12 and the second shell 13 are kept at a predetermined distance. It can be understood that the predetermined distance between the first shell 12 and the second shell 13 can be set as needed. After the first shell 12 and the second shell 13 are kept at a predetermined distance, at least one of the first shell 12 and the second shell 13 can be connected to the core 11. For example, the first shell 12 can be fixed or integrated with the core 11. After the first shell 12 and the second shell 13 are kept at a predetermined distance, the second shell 13 can be fixed to the core 11. Alternatively, the second shell 13 can be fixed or integrated with the core 11. After the first shell 12 and the second shell 13 are kept at a predetermined distance, the first shell 12 can be fixed to the core 11. Alternatively, the first shell 12 and the second shell 13 can be kept at a predetermined distance, and then the first shell 12 and the second shell 13 can be fixed to the core 11. The above fixing methods can include clamping, inserting, screwing, interference fitting, and the like. After the first shell 12 and the second shell 13 are fixed, the coil 14 can be wound to adjust the thickness of the coil 14, thereby adjusting the overall sensitivity, linearity, excitation frequency, and the like of the probe assembly 10, and improving the response speed and accuracy.

[0033] Briefly, the probe assembly 10 for a sensor according to embodiments of the present application has a core 11, and a first shell 12, a coil 14 and a second shell 13 which are sequentially sleeved on the outer peripheral wall of the core 11 in the axial direction, and at least one of the first shell 12 and the second shell 13 can be connected with the core 11 after the first shell 12 and the second shell 13 maintain a preset distance, so that the distance between the first shell 12 and the second shell 13 can be adjusted before winding when the probe assembly 10 is assembled, thereby adjusting the thickness of the coil 14, improving the response speed and accuracy of the sensor, and meeting the performance requirements.

[0034] As shown in Figure 2 In some embodiments of the present application, at least one of the first shell 12 and the second shell 13 can be provided with a limiting portion 131, which can be connected with the core 11 after the first shell 12 and the second shell 13 maintain a preset distance. For example, the limiting portion 131 can be detachably connected with the core 11 by screws or bolts, or the limiting portion 131 can be detachably connected with the core 11 by clamping or inserting, or the limiting portion 131 can be directly bonded and fixed with the core 11 by a contact surface.

[0035] In some embodiments, the limiting portion 131 can be an adhesive layer, and the limiting portion 131 and at least part of the outer peripheral wall of the core 11 can be bonded and fixed. The bonding can provide uniform stress distribution and larger stress bearing area, which helps to enhance the stability and durability of the connection between the limiting portion 131 and the core 11, and the use of bonding can prevent damage to the surface of the core 11 without damaging the material.

[0036] In other embodiments, the outer peripheral wall of the core 11 can be formed with a matching portion which can cooperate with the limiting portion 131. Optionally, one of the matching portion and the limiting portion 131 can be a clamping protrusion, and the other of the matching portion and the limiting portion 131 can be a clamping groove. By clamping and cooperating the clamping protrusion with the clamping groove, the clamping protrusion is accommodated in the clamping groove, and the outer surface of the clamping protrusion abuts against the inner surface of the clamping groove to limit the movement of the clamping protrusion, so that the limiting portion 131 is installed on the core 11.

[0037] As shown in Figure 1 and Figure 2As shown in the drawings, in some embodiments of the present application, the probe assembly 10 further comprises a sealing member 15, which can be sleeved on the outer periphery of the coil 14, and the sealing member 15 can be located between the first shell 12 and the second shell 13, and the sealing member 15 can be in sealing connection with the first shell 12 and the second shell 13 respectively, the sealing member 15 can protect the coil 14 and reduce the influence of temperature on the accuracy of the probe assembly 10, and in specific embodiments, the material of the sealing member 15 can be resin, and the sealing member 15 can be sealed by a resin pouring process, and the resin material has good weather resistance and corrosion resistance, and can resist the erosion of ultraviolet light, high temperature, low temperature and other harsh environments, and can maintain its performance unchanged for a long time.

[0038] As shown in the drawings, Figure 2 and Figure 3 As shown in the drawings, in some embodiments of the present application, the second shell 13 is formed with a relief portion 132 penetrating in the radial direction, the relief portion 132 can extend in the axial direction, and the relief portion 132 can be used to avoid the coil 14, so as to facilitate the winding and arrangement of the coil 14, and the side of the sealing member 15 facing the second shell 13 can be formed with an extension portion 151 extending in the axial direction, wherein the extension portion 151 can be accommodated in the relief portion 132, and the extension portion 151 can be connected with the inner wall of the relief portion 132, and the extension portion 151 can protect the coil 14 in the relief portion 132 and reduce the influence of temperature on the accuracy of the probe assembly 10.

[0039] As shown in the drawings, Figure 1 In some embodiments of the present application, the outer diameter of the first shell 12, the outer diameter of the second shell 13 and the outer diameter of the sealing member 15 are the same, and such arrangement can reduce the overall size of the probe assembly 10, reduce the occupied space of the probe assembly 10, facilitate the miniaturization design of the probe assembly 10, facilitate the detection of the probe assembly 10, and also facilitate the arrangement of the probe assembly 10, facilitate the arrangement of the sensor, and reduce the occupied space of the sensor.

[0040] The sensor of the embodiment of the present application is described below.

[0041] The sensor according to the embodiment of the present application is provided with the probe assembly 10 of the above-mentioned embodiment, and since the sensor according to the embodiment of the present application is provided with the probe assembly 10 of the above-mentioned embodiment, the distance between the first shell 12 and the second shell 13 of the probe assembly 10 of the sensor can be adjusted in advance before winding during assembly, so as to adjust the thickness of the coil 14, improve the response speed and accuracy of the sensor, and meet the performance requirements.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0044] In the description of the present application, "a plurality of" means two or more.

[0045] In the description of the present application, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0046] In the description of the present application, the first feature "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0047] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean 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.

[0048] Although embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A probe assembly for a sensor, characterized by, Comprising: a core (11) extending in an axial direction; a first shell (12) sleeved on an outer peripheral wall of the core (11); a second shell (13) sleeved on the outer peripheral wall of the core (11) and arranged axially spaced from the first shell (12); a coil (14) sleeved on the outer peripheral wall of the core (11) and located between the first shell (12) and the second shell (13), both ends of the coil (14) in the axial direction abutting against the first shell (12) and the second shell (13) respectively; wherein at least one of the first shell (12) and the second shell (13) is adapted to be connected with the core (11) after the first shell (12) and the second shell (13) maintain a preset distance.

2. The probe assembly for a sensor of claim 1, wherein, At least one of the first shell (12) and the second shell (13) is provided with a limiting portion (131) adapted to be connected with the core (11) after the first shell (12) and the second shell (13) maintain a preset distance.

3. The probe assembly for a sensor of claim 2, wherein, The limiting portion (131) is an adhesive layer which is attached to and fixed with at least part of the outer peripheral wall of the core (11).

4. The probe assembly for a sensor of claim 2, wherein, The outer peripheral wall of the core (11) is formed with a matching portion matched with the limiting portion (131).

5. The probe assembly for a sensor according to any one of claims 1-4, characterized in that, The second shell (13) is formed with an avoiding portion (132) penetrating in a radial direction and extending in the axial direction, the avoiding portion (132) being adapted to avoid the coil (14).

6. The probe assembly for a sensor of claim 5, wherein, Further comprising: a sealing member (15) sleeved on the outer periphery of the coil (14) and located between the first shell (12) and the second shell (13), the sealing member (15) being connected with the first shell (12) and the second shell (13) respectively.

7. The probe assembly for a sensor of claim 6, wherein, The side of the sealing member (15) facing the second shell (13) is formed with an extending portion (151) extending in the axial direction, the extending portion (151) being accommodated in the avoiding portion (132) and connected with the inner wall of the avoiding portion (132).

8. The probe assembly for a sensor of claim 6, wherein, The material of the sealing member (15) is resin.

9. The probe assembly for a sensor of claim 6, wherein, The outer diameter of the first shell (12), the outer diameter of the second shell (13) and the outer diameter of the sealing member (15) are the same.

10. A sensor, characterized by A probe assembly for a sensor as claimed in any one of claims 1-9 is included.

Images