CN221037272U - Eddy current sensor assembly - Google Patents

Abstract

The utility model provides an eddy current sensor assembly. The eddy current sensor assembly includes: the first shell is provided with a first installation part, a second installation part, a first through hole and an installation plate, wherein the second installation part is arranged on the installation plate and penetrates through the upper surface of the installation plate, and the first installation part is communicated with the first through hole; a sensor assembly including first and second eddy current sensors, the first eddy current sensor being disposed within the first mounting portion and the second eddy current sensor being disposed within the second mounting portion; the first casing is made by insulating material, has first distance n between second vortex sensor's center pin L2 and the internal surface of first through-hole, has second distance m between second vortex sensor's center pin L2 and the outer peripheral face of mounting panel, and first distance n, second distance m and second vortex sensor's diameter d2 satisfy: d2 is less than or equal to n and less than or equal to 1.5d2, and d2 is less than or equal to m and less than or equal to 1.5d2. The utility model solves the problem that the installation mode of the eddy current sensor in the prior art is easy to generate eddy current loss so as to influence the detection performance of the eddy current sensor.

Description

Eddy current sensor assembly

Technical Field

The utility model relates to the technical field of eddy current sensors, in particular to an eddy current sensor assembly.

Background

At present, the working principle of the eddy current displacement sensor is as follows: an alternating current is introduced into the inner coil of the sensor probe to form a magnetic field around the probe coil, and after the conductor is placed in the magnetic field, an eddy current is excited in the conductor according to Faraday's law of electromagnetic induction. Again according to lenz's law, the magnetic field of the eddy currents is opposite to the magnetic field of the coil, which will change the impedance value of the coil in the probe. The change of the impedance value is directly related to the distance between the coil and the measured object, the sensor probe is connected to the controller, and the controller obtains the change of the voltage value from the sensor probe and can calculate the corresponding distance value based on the change.

In the prior art, the probe of an eddy current sensor is typically mounted on a metal housing to provide good securement of the probe.

However, the above-described mounting of the probe causes eddy current loss to occur in the metal housing, degrading the detection performance of the sensor probe.

Disclosure of utility model

The utility model mainly aims to provide an eddy current sensor assembly so as to solve the problem that the installation mode of an eddy current sensor in the prior art is easy to generate eddy current loss so as to influence the detection performance of the eddy current sensor.

In order to achieve the above object, the present utility model provides an eddy current sensor assembly including: the first shell is provided with a first installation part, a second installation part, a first through hole and an installation plate, wherein the second installation part is arranged on the installation plate and penetrates through the upper surface of the installation plate, the first through hole is used for penetrating through a cylinder to be detected, and the first installation part is communicated with the first through hole; a sensor assembly including a first eddy current sensor disposed within the first mounting portion and a second eddy current sensor disposed within the second mounting portion; the detection surface of the first eddy current sensor and the detection surface of the second eddy current sensor are arranged at an included angle; wherein, first casing is made by insulating material, has first distance n between the central axis L2 of second vortex sensor and the internal surface of first through-hole, has second distance m between the central axis L2 of second vortex sensor and the outer peripheral face of mounting panel, satisfies between first distance n, second distance m and the diameter d2 of second vortex sensor: d2 is less than or equal to n and less than or equal to 1.5d2, and d2 is less than or equal to m and less than or equal to 1.5d2.

Further, a third distance i is provided between the central axis L1 of the first vortex sensor and the upper surface of the mounting plate, a fourth distance j is provided between the central axis L1 of the first vortex sensor and the lower surface of the first housing, and the third distance i, the fourth distance j and the diameter d1 of the first vortex sensor satisfy the following conditions: d1 is less than or equal to i and less than or equal to 1.5d1, and d1 is less than or equal to j and less than or equal to 1.5d1.

Further, the first housing includes: the annular body is provided with a first through hole formed in an inner hole, the first mounting part is arranged on the side wall of the first through hole, and the mounting plate is arranged at one end of the annular body; the flanging structure is arranged at the other end of the annular body; the wire passing part is connected with the mounting plate, the flanging structure and the annular body and is used for enabling wires of each first eddy current sensor and each second eddy current sensor to pass through; wherein, the surface of mounting panel far away from the turn-ups structure is the upper surface, and the surface of turn-ups structure far away from the mounting panel is the lower surface.

Further, the first mounting part is a second through hole, and the second through hole penetrates through the annular body; and/or the second mounting part is a third through hole, and the third through hole penetrates through the mounting plate.

Further, the detection surface of the second vortex sensor is flush with the upper surface of the first shell; and/or the detection surface of the first vortex sensor is flush with the inner hole wall of the annular body.

Further, the first vortex sensor is in interference fit with the first mounting portion; and/or, the second eddy current sensor is interference fit with the second mount.

Further, the mounting plate is a first annular plate, the flanging structure is a second annular plate, and the outer diameter of the first annular plate is smaller than that of the second annular plate; or the outer diameter of the first annular plate is identical to the outer diameter of the second annular plate.

Further, the eddy current sensor assembly further includes: the second shell is provided with a mounting concave part and a fourth through hole which are communicated with each other, the fourth through hole is communicated with the first through hole, and the first shell is arranged in the mounting concave part; wherein, the second casing is made by metal material.

Further, the mounting recess has a first step surface, and the lower surface of the first housing is brought into a limit stop with the first step surface, so that a buffer gap is formed between the lower surface of the first housing and the inner bottom surface of the mounting recess.

Further, the mounting recess penetrates through the upper surface of the second housing, and the upper surface of the second housing protrudes from the upper surface of the first housing.

Further, the mounting recess includes: the countersunk hole is communicated with the fourth hole; and the notch extends along the radial direction of the counter bore, one end of the notch is communicated with the counter bore, the other end of the notch penetrates through the second shell, and the notch is used for installing the wire passing part.

Further, the counterbore includes: a first bore section; one end of the second hole section is communicated with the first hole section, a second step surface is formed between the second hole section and the first hole section, and the inner diameter of the second hole section is larger than that of the first hole section; the other end of the second hole section is communicated with the third hole section, a third step surface is formed between the other end of the second hole section and one end of the third hole section, and the inner diameter of the third hole section is smaller than that of the second hole section; the other end of the third hole section is communicated with the fourth hole section, and a first step surface is formed between the third hole section and the fourth hole section; wherein, the mounting panel is located first hole section, and the turn-ups structure is located third hole section and with the spacing backstop of first step face.

Further, the plurality of first eddy current sensors are arranged at intervals along the circumferential direction of the first through hole; and/or the number of the second eddy current sensors is two, and the two second eddy current sensors are uniformly arranged along the circumferential interval of the first through hole.

Further, the surface of the annular body facing the inner bottom surface of the mounting recess protrudes from the surface of the burring structure facing the inner bottom surface of the mounting recess.

By applying the technical scheme of the utility model, the electric vortex sensor assembly comprises a first shell and a sensor assembly, wherein the first shell is provided with a first installation part, a second installation part, a first through hole and an installation plate, the second installation part is arranged on the installation plate and penetrates through the upper surface of the installation plate, the first through hole is used for penetrating a cylinder to be detected, and the first installation part is communicated with the first through hole. The sensor assembly comprises a first eddy current sensor and a second eddy current sensor, wherein the first eddy current sensor is arranged in the first mounting part, and the second eddy current sensor is arranged in the second mounting part; the detection surface of the first eddy current sensor and the detection surface of the second eddy current sensor are arranged at an included angle. Wherein, first casing is made by insulating material, has first distance n between the central axis L2 of second vortex sensor and the internal surface of first through-hole, has second distance m between the central axis L2 of second vortex sensor and the outer peripheral face of mounting panel, satisfies between first distance n, second distance m and the diameter d2 of second vortex sensor: d2 is less than or equal to n and less than or equal to 1.5d2, and d2 is less than or equal to m and less than or equal to 1.5d2. Like this, first vortex sensor and second vortex sensor all install on the first casing of being made by insulating material, owing to first casing can avoid eddy current loss, and then improved the effective range and the linearity of electric vortex sensor subassembly, solved among the prior art electric vortex sensor's mounting means and easily produced eddy current loss and influence its problem of testing performance, promoted vortex sensor's detection reliability. Meanwhile, the detection surface of the first eddy current sensor and the detection surface of the second eddy current sensor are arranged at an included angle, so that the two eddy current sensors can be used for detecting conductors on different surfaces respectively, the universality of the eddy current sensor assembly is improved, and the application range of the eddy current sensor assembly is widened.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 illustrates a schematic perspective view of a first embodiment of an electrical vortex sensor assembly in accordance with the present utility model;

FIG. 2 illustrates a top view of the electrical vortex sensor assembly of FIG. 1;

FIG. 3 illustrates a cross-sectional view of the electrical vortex sensor assembly of FIG. 1 in a first direction;

FIG. 4 illustrates a cross-sectional view of the electrical vortex sensor assembly of FIG. 1 in a second direction;

FIG. 5 illustrates a cross-sectional view of the electrical vortex sensor assembly of FIG. 1 in a third direction;

FIG. 6 illustrates a schematic perspective view of a first housing of the electrical vortex sensor assembly of FIG. 1;

FIG. 7 illustrates a bottom view of the electrical vortex sensor assembly of FIG. 6;

FIG. 8 illustrates a cross-sectional view of the electrical vortex sensor assembly of FIG. 6;

FIG. 9 shows a schematic perspective view of a second embodiment of an eddy current sensor assembly in accordance with the utility model;

FIG. 10 illustrates a top view of the electrical vortex sensor assembly of FIG. 9;

FIG. 11 illustrates a cross-sectional view of the electrical vortex sensor assembly of FIG. 9 in a third direction;

FIG. 12 illustrates a cross-sectional view of the electrical vortex sensor assembly of FIG. 9 in a fourth direction;

FIG. 13 shows an enlarged schematic view at A of the electrical vortex sensor assembly of FIG. 12;

FIG. 14 illustrates a schematic perspective view of a first housing of the electrical vortex sensor assembly of FIG. 9;

fig. 15 shows a bottom view of the first housing of fig. 14;

fig. 16 shows a cross-sectional view of the first housing of fig. 14;

FIG. 17 illustrates a schematic perspective view of a second housing of the electrical vortex sensor assembly of FIG. 9;

fig. 18 shows a top view of the second housing of fig. 17;

Fig. 19 shows a cross-sectional view of the second housing in fig. 17.

Wherein the above figures include the following reference numerals:

10. A second housing; 11. a mounting recess; 111. a first step surface; 112. a countersunk hole; 1121. a first bore section; 1122. a second bore section; 1123. a third bore section; 1124. a fourth bore section; 113. a notch; 12. a fourth through hole; 13. a buffer gap;

20. A first housing; 21. a wire passing portion; 22. a first mounting portion; 23. a second mounting portion; 24. a first through hole; 25. an annular body; 26. a mounting plate; 27. a flanging structure; 28. coaming plate;

30. A first eddy current sensor;

40. And a second eddy current sensor.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

The application provides an eddy current sensor component, which aims to solve the problem that the detection performance of an eddy current sensor is affected due to eddy current loss in the installation mode of the eddy current sensor in the prior art.

Example 1

As shown in fig. 1 to 8, the eddy current sensor assembly includes a first housing 20 and a sensor assembly. The first housing 20 has a first mounting portion 22, a second mounting portion 23, a first through hole 24, and a mounting plate 26, the second mounting portion 23 is disposed on the mounting plate 26 and penetrates the upper surface of the mounting plate 26, the first through hole 24 is used for penetrating the cylinder to be detected, and the first mounting portion 22 communicates with the first through hole 24. The sensor assembly includes a first eddy current sensor 30 and a second eddy current sensor 40, the first eddy current sensor 30 being disposed within the first mounting portion 22 and the second eddy current sensor 40 being disposed within the second mounting portion 23. The detection surface of the first eddy current sensor 30 and the detection surface of the second eddy current sensor 40 form an included angle. Wherein, the first casing 20 is made of insulating material, and the central axis L2 of the second vortex sensor 40 and the inner surface of the first through hole 24 have a first distance n therebetween, and the central axis L2 of the second vortex sensor 40 and the outer circumferential surface of the mounting plate 26 have a second distance m therebetween, and the first distance n, the second distance m, and the diameter d2 of the second vortex sensor 40 satisfy: d2 is less than or equal to n and less than or equal to 1.5d2, and d2 is less than or equal to m and less than or equal to 1.5d2.

By applying the technical scheme of the embodiment, the first eddy current sensor 30 and the second eddy current sensor 40 are both installed on the first shell 20 made of insulating materials, and the first shell 20 can avoid eddy current loss, so that the effective range and linearity of the eddy current sensor assembly are improved, the problem that the detection performance of the eddy current sensor is influenced due to the fact that the eddy current loss is easily generated in the installation mode of the eddy current sensor in the prior art is solved, and the detection reliability of the eddy current sensor is improved. Meanwhile, the detection surface of the first eddy current sensor 30 and the detection surface of the second eddy current sensor 40 are arranged at an included angle, so that the two eddy current sensors can be used for detecting conductors on different surfaces respectively, the universality of the eddy current sensor assembly is improved, and the application range of the eddy current sensor assembly is widened.

In the present embodiment, the second eddy current sensor 40 has a columnar shape.

In this embodiment, the first distance n is 1.5d2.

It should be noted that the value of the first distance n is not limited to this, and may be adjusted according to the working condition and the use requirement. Alternatively, the first distance n is 1.1d2, or 1.2d2, or 1.3d2, or 1.4d2.

In this embodiment, the second distance m is 1.5d2.

It should be noted that the value of the second distance m is not limited to this, and may be adjusted according to the working condition and the use requirement. Alternatively, the second distance m is 1.1d2, or 1.2d2, or 1.3d2, or 1.4d2.

In this embodiment, the detection surface of the first eddy current sensor 30 and the detection surface of the second eddy current sensor 40 are perpendicular to each other, i.e. the first eddy current sensor 30 is a radial eddy current sensor for detecting a cylinder to be detected extending into the first through hole 24, and the second eddy current sensor 40 is an axial eddy current sensor for detecting a conductor to be detected located above the eddy current sensor assembly.

In this embodiment, the first housing 20 is formed by injection molding of plastic material, so that the processing cost and processing difficulty of the first housing 20 are reduced on the premise of ensuring insulation reliability. Meanwhile, the insulation of the eddy current sensor is improved, the short circuit of a naked lead on the eddy current sensor is avoided, and the operation reliability of the eddy current sensor assembly is enhanced.

As shown in fig. 4 and 5, a third distance i is provided between the central axis L1 of the first vortex sensor 30 and the upper surface of the mounting plate 26, a fourth distance j is provided between the central axis L1 of the first vortex sensor 30 and the lower surface of the first housing 20, and the third distance i, the fourth distance j, and the diameter d1 of the first vortex sensor 30 satisfy: d1 is less than or equal to i and less than or equal to 1.5d1, and d1 is less than or equal to j and less than or equal to 1.5d1. Like this, above-mentioned setting ensures that there is not metallic structure near first vortex sensor 30, and then avoids weakening the electromagnetic field of first vortex sensor 30, and then avoids eddy current loss, and then has improved the effective range and the linearity of electric vortex sensor subassembly, has solved the easy problem that produces eddy current loss and influence its detection performance of installation mode of electric vortex sensor among the prior art, has promoted vortex sensor's detection reliability.

In the present embodiment, the first eddy current sensor 30 has a columnar shape.

In this embodiment, the third distance i is 1.5d2.

It should be noted that the value of the third distance i is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the third distance i is 1.1d2, or 1.2d2, or 1.3d2, or 1.4d2.

In this embodiment, the fourth distance j is 1.5d2.

It should be noted that the value of the fourth distance j is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the fourth distance j is 1.1d2, or 1.2d2, or 1.3d2, or 1.4d2.

As shown in fig. 1 to 8, the first housing 20 includes an annular body 25, a burring structure 27, and a wire passing portion 21. The inner hole of the annular body 25 forms a first through hole 24, the first mounting portion 22 is provided on a side wall of the first through hole 24, the mounting plate 26 is provided on one end of the annular body 25, and the burring structure 27 is provided on the other end of the annular body 25. The wire passing portion 21 is connected to the mounting plate 26, the flange structure 27 and the annular body 25, and the wire passing portion 21 is used for passing through wires of the first eddy current sensor 30 and the second eddy current sensor 40. Wherein, the surface of the mounting plate 26 away from the flanging structure 27 is an upper surface, and the surface of the flanging structure 27 away from the mounting plate 26 is a lower surface. In this way, the above arrangement makes the structure of the first housing 20 simpler, and easy to process and implement, and reduces the processing cost and processing difficulty of the first housing 20; on the other hand, the structural layout of the first eddy current sensor 30 and the second eddy current sensor 40 on the first housing 20 is more reasonable and compact, and the space utilization rate of the first housing 20 is improved.

Specifically, the mounting plate 26 is mounted on the outer peripheral surface of the annular body 25, and the surface of the mounting plate 26, which is far away from the flanging structure 27, is arranged flush with the upper end surface of the annular body 25, so that on one hand, the appearance of the first housing 20 is more attractive and tidy; on the other hand, the cutting injury or the scratch of workers caused by sharp edges formed between the two can be avoided. The flanging structure 27 is mounted on the outer peripheral surface of the annular body 25, and the lower end surface of the annular body 25 protrudes out of the surface of the flanging structure 27 away from the mounting plate 26, so that the first shell 20 is supported in the second shell 10 through the lower end surface of the annular body 25, and the assembly stability of the first shell and the second shell is improved.

As shown in fig. 1 and 6, the first housing 20 further includes a shroud 28, and the shroud 28 surrounds the wire passing portion 21, so that the structure of the wire passing portion 21 is simpler, easy to process and implement, and the processing cost and the processing difficulty of the wire passing portion 21 are reduced.

Specifically, the coaming 28 includes a first plate body, a second plate body, a third plate body and a fourth plate body connected end to end, the first plate body and the third plate body are parallel to each other and oppositely arranged, the second plate body and the fourth plate body are parallel to each other and oppositely arranged, the first plate body is connected with the mounting plate 26 and is arranged in parallel, and the third plate body is connected with the flanging structure 27 and is arranged in parallel.

Alternatively, the first mounting portion 22 is a second through hole penetrating the annular body 25; and/or the second mounting portion 23 is a third through hole that extends through the mounting plate 26. Like this, above-mentioned setting on the one hand makes the structure of installation department simpler, easy processing, realization, also ensures that vortex sensor can install in the through-hole that corresponds, has reduced vortex sensor's dismouting degree of difficulty.

In the present embodiment, the first mounting portion 22 is a second through hole, the second through hole penetrates the annular body 25, and the extending direction of the second through hole is along the radial direction of the annular body 25. The second mounting portion 23 is a third through hole penetrating the mounting plate 26, and the third through hole is located outside the first through hole 24 and extends in the thickness direction of the mounting plate 26.

In this embodiment, the second through hole and the third through hole are both circular holes.

Alternatively, the detection surface of the second vortex sensor 40 is disposed flush with the upper surface of the first housing 20; and/or the detection face of the first vortex sensor 30 is arranged flush with the inner bore wall of the annular body 25. In this way, the above arrangement ensures that the first eddy current sensor 30 and the second eddy current sensor 40 can normally detect, and improves the detection accuracy of both. Meanwhile, the structure interference phenomenon between the eddy current sensor and the structure to be detected in the detection process is avoided.

Optionally, the first vortex sensor 30 is interference fit with the first mount 22; and/or the second vortex sensor 40 is interference fit with the second mounting portion 23. Thus, the arrangement improves the assembly stability between the vortex sensor and the mounting part on one hand and avoids the influence on the detection reliability caused by mutual separation of the vortex sensor and the mounting part; on the other hand, the arrangement makes the assembly of the two easier and simpler, and reduces the assembly difficulty.

In the present embodiment, the first eddy current sensor 30 is interference fit with the first mounting part 22, and the second eddy current sensor 40 is interference fit with the second mounting part 23.

Alternatively, the mounting plate 26 is a first annular plate, the flanging structure 27 is a second annular plate, and the outer diameter of the first annular plate is smaller than that of the second annular plate; or the outer diameter of the first annular plate is identical to the outer diameter of the second annular plate. In this way, the arrangement makes the structure of the mounting plate 26 and the flanging structure 27 simpler, and is easy to process and realize, so that the overall processing cost of the eddy current sensor assembly is reduced; on the other hand, when the outer diameter of the second annular plate is larger than that of the first annular plate, the flanging structure 27 can be used as a supporting plate of the first housing 20, so as to improve the overall placement stability of the eddy current sensor assembly, and avoid shaking or moving to affect the normal use of the eddy current sensor assembly.

In the present embodiment, the outer diameter of the first annular plate is smaller than the outer diameter of the second annular plate, and the burring structure 27 serves as a support plate for the first housing 20.

Alternatively, the first eddy current sensors 30 are plural, and the plural first eddy current sensors 30 are disposed at intervals along the circumferential direction of the first through hole 24; and/or, the second eddy current sensors 40 are two, and the two second eddy current sensors 40 are uniformly arranged at intervals along the circumferential direction of the first through hole 24. In this way, the above arrangement improves the detection accuracy of the first and second eddy current sensors 30 and 40, and thus improves the overall detection accuracy of the eddy current sensor assembly.

In the present embodiment, the number of the first eddy current sensors 30 is four, the four first eddy current sensors 30 are disposed at intervals along the circumferential direction of the first through hole 24, and the four first eddy current sensors 30 are uniformly distributed along the circumferential direction of the first through hole 24. The two second eddy current sensors 40 are disposed opposite to each other.

It should be noted that the number of the first vortex sensors 30 is not limited thereto, and may be adjusted according to the working conditions and the use requirements. Alternatively, the first eddy current sensor 30 is two, or three, or five, or six, or more.

Example two

The eddy current sensor assembly in the second embodiment differs from the first embodiment in that: the structure of the eddy current sensor assembly is different.

As shown in fig. 9 to 19, the eddy current sensor assembly further includes a second housing 10. The second housing 10 has a mounting recess 11 and a fourth through hole 12 communicating with each other, the fourth through hole 12 communicating with the first through hole 24, and the first housing 20 is disposed in the mounting recess 11. Wherein, the second housing 10 is made of metal material. Thus, the first housing 20 is mounted on the second housing 10 to ensure the overall structural strength of the eddy current sensor assembly through the second housing 10, thereby prolonging the service life of the eddy current sensor assembly.

In this embodiment, the second housing 10 is made of a metal material, so that the structural strength of the second housing 10 is further improved, the first housing 20 is better protected, and the service life of the eddy current sensor assembly is prolonged. In this way, the second housing 10 is used for locking, thereby ensuring the rigidity and strength of the eddy current sensor assembly.

As shown in fig. 13 and 19, the mounting recess 11 has a first stepped surface 111, and the lower surface of the first housing 20 is brought into a limit stop with the first stepped surface 111 so that a buffer gap 13 is formed between the lower surface of the first housing 20 and the inner bottom surface of the mounting recess 11. Thus, when the eddy current sensor assembly is in an assembled state, the buffer gap 13 and the cavity are formed between the lower surface of the first shell 20 and the inner bottom surface of the second shell 10, so that the two parts are not completely attached, and the contact area of the two parts is reduced. If the electric vortex sensor assembly is impacted or impacted, the impact force applied to the first housing 20 can be reduced, and further the influence on the operation reliability of the electric vortex sensor assembly caused by structural damage of the first vortex sensor 30 and the second vortex sensor 40 mounted on the first housing 20 is avoided. At the same time, the end face clearance can promote the radial protection capability of the second housing 10.

In the present embodiment, the mounting recess 11 penetrates the upper surface of the second housing 10, and the upper surface of the second housing 10 protrudes from the upper surface of the first housing 20. Thus, the mounting recess 11 is convenient to mount and dismount the second casing 10 and the first casing 20, so that the mounting and dismounting difficulty of the second casing and the first casing is reduced, and the labor intensity of workers is reduced. Meanwhile, since the upper surface of the second housing 10 protrudes from the upper surface of the first housing 20, the first eddy current sensor 30 and the second eddy current sensor 40 are mechanically protected, and thus the service life of the eddy current sensor assembly is prolonged.

As shown in fig. 17 to 19, the mounting recess 11 includes a counterbore 112 and a notch 113. Wherein the counter bore 112 communicates with the fourth bore 12. Extending along the radial direction of the counter bore 112, one end of the notch 113 communicates with the counter bore 112, the other end of the notch 113 penetrates the second housing 10, and the notch 113 is used for mounting the wire passing portion 21. In this way, the arrangement on one hand makes the structure of the mounting concave part 11 simpler, easy to process and realize, and reduces the processing cost and processing difficulty of the eddy current sensor assembly; on the other hand, the positioning reliability of the second casing 10 to the first casing 20 is improved, and the influence on the detection accuracy and the detection reliability of the eddy current sensor assembly caused by the rotation or the movement of the first casing 20 relative to the second casing 10 is avoided.

As shown in fig. 19, the counter bore 112 includes a first bore section 1121, a second bore section 1122, a third bore section 1123, and a fourth bore section 1124. One end of the second bore section 1122 communicates with the first bore section 1121 and forms a second stepped surface with the first bore section 1121, the second bore section 1122 having an inner diameter greater than the inner diameter of the first bore section 1121. The other end of the second bore section 1122 communicates with the third bore section 1123 and forms a third stepped surface with one end of the third bore section 1123, the inner diameter of the third bore section 1123 being smaller than the inner diameter of the second bore section 1122. The other end of the third hole section 1123 communicates with the fourth hole section 1124 and forms a first step surface 111 with the fourth hole section 1124. Wherein, mounting plate 26 is located in first hole section 1121, and flange structure 27 is located in third hole section 1123 and is spacing stop with first step face 111. Thus, on one hand, the structure of the counter bore 112 is simpler, the counter bore is easy to process and realize, and the processing cost and the processing difficulty of the electric vortex sensor assembly are reduced; on the other hand, the protection intensity of the second shell 10 to the first shell 20 is improved, the protection intensity of the first eddy current sensor 30 and the second eddy current sensor 40 is further improved, and the service life of the eddy current sensor assembly is prolonged.

Specifically, the first hole section 1121, the second hole section 1122, the third hole section 1123 and the fourth hole section 1124 are coaxially disposed, and the mounting plate 26 is attached to the first hole section 1121 and the flange structure 27 is attached to the third hole section 1123, so as to prevent the first housing 20 from shaking or moving relative to the second housing 10.

In the present embodiment, the fourth through hole 12 is disposed coaxially with the first through hole 24, and the inner diameter of the fourth through hole 12 is smaller than the inner diameter of the first through hole 24. In this way, the above arrangement can provide better mechanical protection for the first housing 20, the first vortex sensor 30 and the second vortex sensor 40, thereby prolonging the service life of the electrical vortex sensor assembly.

In the present embodiment, the fourth through hole 12 and the first through hole 24 are circular holes.

In the present embodiment, the surface of the annular body 25 facing the inner bottom surface of the mounting recess 11 protrudes beyond the surface of the burring structure 27 facing the inner bottom surface of the mounting recess 11. In this way, the above-described arrangement of the annular body 25 serves to support the first housing 20 to promote the assembly stability between the first housing 20 and the second housing 10.

In the present embodiment, an injection molding groove is formed between the outer peripheral surface of the annular body 25 and the mounting plate 26 and the flanging structure 27, a void groove is formed between the injection molding groove and the second hole section 1122, and the void between the second housing 10 and the first housing 20 is filled by pouring sealant into the wire passing portion 21 or by injection molding again, so that the second housing 10 and the first housing 20 are integrated and fixed.

In this embodiment, the outer diameter of the first annular plate is identical to the outer diameter of the second annular plate, so that the structures of the mounting plate 26 and the flanging structure 27 are simpler, and the processing and implementation are easy, and the overall processing cost and processing difficulty of the electric vortex sensor assembly are reduced.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the electric vortex sensor assembly comprises a first shell and a sensor assembly, wherein the first shell is provided with a first installation part, a second installation part, a first through hole and an installation plate, the second installation part is arranged on the installation plate and penetrates through the upper surface of the installation plate, the first through hole is used for penetrating through a cylinder to be detected, and the first installation part is communicated with the first through hole. The sensor assembly comprises a first eddy current sensor and a second eddy current sensor, wherein the first eddy current sensor is arranged in the first mounting part, and the second eddy current sensor is arranged in the second mounting part; the detection surface of the first eddy current sensor and the detection surface of the second eddy current sensor are arranged at an included angle. Wherein, first casing is made by insulating material, has first distance n between the central axis L2 of second vortex sensor and the internal surface of first through-hole, has second distance m between the central axis L2 of second vortex sensor and the outer peripheral face of mounting panel, satisfies between first distance n, second distance m and the diameter d2 of second vortex sensor: d2 is less than or equal to n and less than or equal to 1.5d2, and d2 is less than or equal to m and less than or equal to 1.5d2. Like this, first vortex sensor and second vortex sensor all install on the first casing of being made by insulating material, owing to first casing can avoid eddy current loss, and then improved the effective range and the linearity of electric vortex sensor subassembly, solved among the prior art electric vortex sensor's mounting means and easily produced eddy current loss and influence its problem of testing performance, promoted vortex sensor's detection reliability. Meanwhile, the detection surface of the first eddy current sensor and the detection surface of the second eddy current sensor are arranged at an included angle, so that the two eddy current sensors can be used for detecting conductors on different surfaces respectively, the universality of the eddy current sensor assembly is improved, and the application range of the eddy current sensor assembly is widened.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (14)

1. An electrical vortex sensor assembly comprising:

The first shell (20) is provided with a first installation part (22), a second installation part (23), a first through hole (24) and an installation plate (26), wherein the second installation part (23) is arranged on the installation plate (26) and penetrates through the upper surface of the installation plate (26), the first through hole (24) is used for penetrating through a cylinder to be detected, and the first installation part (22) is communicated with the first through hole (24);

A sensor assembly comprising a first eddy current sensor (30) and a second eddy current sensor (40), the first eddy current sensor (30) being disposed within the first mounting portion (22), the second eddy current sensor (40) being disposed within the second mounting portion (23); an included angle is formed between the detection surface of the first eddy current sensor (30) and the detection surface of the second eddy current sensor (40);

Wherein the first housing (20) is made of an insulating material, a first distance n is provided between a central axis L2 of the second vortex sensor (40) and an inner surface of the first through hole (24), a second distance m is provided between the central axis L2 of the second vortex sensor (40) and an outer circumferential surface of the mounting plate (26), and the first distance n, the second distance m, and a diameter d2 of the second vortex sensor (40) satisfy: d2 is less than or equal to n and less than or equal to 1.5d2, and d2 is less than or equal to m and less than or equal to 1.5d2.

2. The electrical vortex sensor assembly of claim 1 wherein a third distance i is provided between the central axis L1 of the first vortex sensor (30) and the upper surface of the mounting plate (26), a fourth distance j is provided between the central axis L1 of the first vortex sensor (30) and the lower surface of the first housing (20), the third distance i, the fourth distance j and the diameter d1 of the first vortex sensor (30) being such that: d1 is less than or equal to i and less than or equal to 1.5d1, and d1 is less than or equal to j and less than or equal to 1.5d1.

3. The electrical vortex sensor assembly of claim 2 wherein the first housing (20) comprises:

-an annular body (25), the inner bore of the annular body (25) forming the first through hole (24), the first mounting portion (22) being arranged on a side wall of the first through hole (24), the mounting plate (26) being arranged on one end of the annular body (25);

A flanging structure (27) provided on the other end of the annular body (25);

A wire passing portion (21) connected to the mounting plate (26), the flange structure (27) and the annular body (25), wherein the wire passing portion (21) is used for passing through wires of the first eddy current sensor (30) and the second eddy current sensor (40);

the surface of the mounting plate (26) far away from the flanging structure (27) is the upper surface, and the surface of the flanging structure (27) far away from the mounting plate (26) is the lower surface.

4. An electrical vortex sensor assembly according to claim 3, characterized in that the first mounting portion (22) is a second through hole extending through the annular body (25); and/or, the second mounting part (23) is a third through hole, and the third through hole penetrates through the mounting plate (26).

5. An electrical vortex sensor assembly according to claim 3, characterized in that the detection face of the second vortex sensor (40) is arranged flush with the upper surface of the first housing (20); and/or the detection surface of the first vortex sensor (30) is arranged flush with the inner hole wall of the annular body (25).

6. The electrical vortex sensor assembly of claim 1 wherein the first vortex sensor (30) is interference fit with the first mount (22); and/or the second vortex sensor (40) is interference fit with the second mounting portion (23).

7. An electrical vortex sensor assembly according to claim 3, characterized in that the mounting plate (26) is a first annular plate, the flanging structure (27) is a second annular plate, the outer diameter of the first annular plate being smaller than the outer diameter of the second annular plate; or the outer diameter of the first annular plate is identical to the outer diameter of the second annular plate.

8. The electrical vortex sensor assembly of claim 3 further comprising:

A second housing (10) having a mounting recess (11) and a fourth through hole (12) communicating with each other, the fourth through hole (12) communicating with the first through hole (24), the first housing (20) being disposed within the mounting recess (11);

wherein the second housing (10) is made of a metal material.

9. The electrical vortex sensor assembly according to claim 8, characterized in that the mounting recess (11) has a first step surface (111), the lower surface of the first housing (20) being in limit stop with the first step surface (111) such that a buffer gap is formed between the lower surface of the first housing (20) and the inner bottom surface of the mounting recess (11).

10. The eddy current sensor assembly according to claim 8, wherein the mounting recess (11) extends through an upper surface of the second housing (10), the upper surface of the second housing (10) being provided protruding from an upper surface of the first housing (20).

11. The electrical vortex sensor assembly according to claim 9, characterized in that the mounting recess (11) comprises:

A counter bore (112) in communication with the fourth through bore (12);

The notch (113) extends along the radial direction of the counter bore (112), one end of the notch (113) is communicated with the counter bore (112), the other end of the notch (113) penetrates through the second shell (10), and the notch (113) is used for installing the wire passing portion (21).

12. The electrical vortex sensor assembly of claim 11 wherein the counterbore (112) comprises:

A first bore section (1121);

A second hole section (1122), wherein one end of the second hole section (1122) is communicated with the first hole section (1121) and forms a second step surface with the first hole section (1121), and the inner diameter of the second hole section (1122) is larger than the inner diameter of the first hole section (1121);

A third hole section (1123), the other end of the second hole section (1122) is communicated with the third hole section (1123) and forms a third step surface with one end of the third hole section (1123), and the inner diameter of the third hole section (1123) is smaller than the inner diameter of the second hole section (1122);

A fourth hole section (1124), the other end of the third hole section (1123) being in communication with the fourth hole section (1124) and forming the first step surface (111) with the fourth hole section (1124);

The mounting plate (26) is located in the first hole section (1121), and the flanging structure (27) is located in the third hole section (1123) and is in limit stop with the first step surface (111).

13. The electrical vortex sensor assembly of claim 1 wherein the first vortex sensor (30) is a plurality of the first vortex sensors (30) spaced apart along the circumference of the first through bore (24); and/or the number of the second eddy current sensors (40) is two, and the two second eddy current sensors (40) are uniformly arranged along the circumferential interval of the first through hole (24).

14. The electrical vortex sensor assembly according to claim 8, characterized in that the surface of the annular body (25) facing the inner bottom surface of the mounting recess (11) protrudes from the surface of the flanging structure (27) facing the inner bottom surface of the mounting recess (11).