CN204240938U - Current vortex sensor - Google Patents
Current vortex sensor Download PDFInfo
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- CN204240938U CN204240938U CN201420761663.0U CN201420761663U CN204240938U CN 204240938 U CN204240938 U CN 204240938U CN 201420761663 U CN201420761663 U CN 201420761663U CN 204240938 U CN204240938 U CN 204240938U
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Abstract
The utility model provides a kind of current vortex sensor, comprising: housing; Probe, pop one's head in as multiple, multiple probe is all arranged on the inside of housing, and the end of probe of probe is all in the inner side of the outside surface of housing, with the outside surface avoiding the end of probe of popping one's head in protrude from housing.End of probe due to multiple probe is all in the inner side of the outside surface of housing; thus during external force collision current vortex sensor; housing can play a protective role to probe; thus avoid probe damaged because clashing into; reduce the failure rate of probe, improve the dependability of current vortex sensor, extend the serviceable life of current vortex sensor.
Description
Technical field
The utility model relates to testing sensor technical field, in particular to a kind of current vortex sensor.
Background technology
Current vortex sensor of the prior art, particularly integrated electric eddy current sensor, can be applicable in magnetic suspension motor motion of main shaft status monitoring.
When monitoring magnetic suspension motor motion of main shaft state in prior art, the main eddy current displacement sensor that adopts detects in real time, and therefore, the precision of current vortex sensor and stability directly have influence on efficiency and the reliability of magnetic suspension motor.
Be applied to the following problem of current vortex sensor ubiquity of magnetic suspension motor in the market:
1., outside the probe housing protruded with current vortex sensor, therefore the protective effect of housing to probe of current vortex sensor is less, easily causes tip damage more;
2. current vortex sensor is not provided with and compensates probe, current vortex sensor is influenced by environmental temperature, can not be applicable to the place of the rugged surroundings such as high temperature, high pressure;
3. fore-lying device (control of sensor, treatment circuit) is integrated in the housing of current vortex sensor more, proposes higher requirement to the temperature stability of control circuit components and parts, pressure stability.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of current vortex sensor, pops one's head in because protruding the problem that housing outer surface is arranged and fragile, the sensor serviceable life of causing popping one's head in is short to solve in prior art.
To achieve these goals, the utility model provides a kind of current vortex sensor, comprising: housing; Probe, pop one's head in as multiple, multiple probe is all arranged on the inside of housing, and the end of probe of probe is all in the inner side of the outside surface of housing, with the outside surface avoiding the end of probe of popping one's head in protrude from housing.
Further, multiple probe comprises multiple radial direction probe, and housing has inner ring surface, and inner ring surface has the radial exploration hole of dodging radial probe, and the end of probe of radial probe is corresponding with radial exploration hole to be arranged, and the radial direction end of probe of popping one's head in and inner ring surface tangent.
Further, housing is loop configuration, and the inside of housing has ring groove, forms the madial wall of housing between the inner side cell wall of ring groove and the inner ring surface of housing, and madial wall has the radial exploration hole of the through setting of radial direction along housing.
Further, form the lateral wall of housing between the outside cell wall of ring groove and the outer ring surface of housing, lateral wall has the cable-through hole of the through setting of axis of radially exploration hole.
Further, form the lateral wall of housing between the outside cell wall of ring groove and the outer ring surface of housing, lateral wall also has the line opening be excessively communicated with ring groove.
Further, current vortex sensor also comprises encapsulation part, and the space that encapsulation part is filled in housing forms solid circular cylinder to make housing.
Further, multiple probe comprises at least one axial probe, and housing has inner ring surface and the radial end face perpendicular with inner ring surface, and the end of probe of axial probe is concordant with the radial end face of housing.
Further, multiple probe comprises: radial probe, and radial probe is for multiple, and multiple radial direction probe is equally spaced arranged around the circumference of housing; Axial probe, axial probe is one, and axial probe is positioned on the perpendicular bisector of the line of two the radial probes be disposed adjacent.
Further, current vortex sensor also comprises fore-lying device, and fore-lying device is electrically connected with probe, and fore-lying device is positioned at the outside of housing and independently arranges with housing.
Further, multiple probe also comprises: metalwork, and metalwork to be arranged on housing and to contact with external environment; Compensate probe, the end of probe compensating probe is arranged on metalwork.
Further, current vortex sensor also comprises range adjusting portion, compensates the end of probe of probe by range adjusting portion and metal pieces into contact.
Further, housing is loop configuration, and the inside of housing has ring groove, the shoulder hole that the bottom land that housing also has through ring groove is arranged, and be greater than the aperture away from ring groove side near the aperture of ring groove side in shoulder hole, compensation probe and metalwork are arranged in shoulder hole, and metalwork backstop is at the cascaded surface place of shoulder hole.
Further, metalwork is identical with the material of detected rotating shaft.
Application the technical solution of the utility model, multiple probe is all arranged on the inside of housing, and the end of probe of probe is all in the inner side of the outside surface of housing.End of probe due to multiple probe is all in the inner side of the outside surface of housing; thus during external force collision current vortex sensor; housing can play a protective role to probe; thus avoid probe damaged because clashing into; reduce the failure rate of probe, improve the dependability of current vortex sensor, extend the serviceable life of current vortex sensor.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of the current vortex sensor in the utility model;
Fig. 2 shows the installation relation schematic diagram of housing in the utility model and probe;
Fig. 3 shows the installation relation schematic diagram that the housing in the utility model is popped one's head in radial direction;
Fig. 4 shows the installation relation schematic diagram of housing in the utility model and axial probe;
Fig. 5 shows the installation relation schematic diagram that the housing in the utility model is popped one's head in compensation; And
Fig. 6 shows the compensation principle figure of the compensation probe in the utility model.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, housing; 11, inner ring surface; 11a, radial exploration hole; 12, ring groove; 12a, inner side cell wall; 12b, outside cell wall; 12c, bottom land; 13, madial wall; 14, outer ring surface; 15, lateral wall; 15a, cable-through hole; 15b, excessively line opening; 16, radial end face; 17, shoulder hole; 17a, cascaded surface; 20, radial probe; 30, encapsulation part; 40, axial probe; 50, metalwork; 60, probe is compensated; 70, range adjusting portion; 80, rotating shaft.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
The utility model provides a kind of current vortex sensor.As shown in Figures 1 to 6, current vortex sensor comprises housing 10 and probe, and pop one's head in as multiple, multiple probe is all arranged on the inside of housing 10, and the end of probe of probe is all in the inner side of the outside surface of housing 10.End of probe due to multiple probe is all in the inner side of the outside surface of housing 10; thus during external force collision current vortex sensor; housing 10 can play a protective role to probe; thus avoid probe damaged because clashing into; reduce the failure rate of probe, improve the dependability of current vortex sensor, extend the serviceable life of current vortex sensor.
Preferably, housing 10 adopts aluminium alloy or the stainless steel manufacture of weak magnetic conduction.The housing 10 adopting the aluminium alloy of weak magnetic conduction or stainless steel to manufacture, effectively can reduce the interference of strong magnetic conductive metal housing to probe vortex field, improve measuring accuracy.
Multiple probes in the utility model comprise multiple radial direction probe 20, housing 10 has inner ring surface 11, inner ring surface 11 has the radial exploration hole 11a dodging radial probe 20, the end of probe of radial probe 20 is corresponding with radial exploration hole 11a to be arranged, and the end of probe of radial probe 20 and inner ring surface 11 tangent (please refer to Fig. 2 and Fig. 3).Due to radial direction probe 20 end of probe and inner ring surface 11 tangent; thus while the radial probe 20 of guarantee is subject to the protection of inner ring surface 11; also assures that the measuring accuracy of radial probe 20, avoid because radial direction probe 20 is too absorbed in the problem causing measuring accuracy to reduce in housing 10.
In preferred implementation as shown in Figure 1 to Figure 3, housing 10 is loop configuration, and the inside of housing 10 has ring groove 12, form the madial wall 13 of housing 10 between the inner side cell wall 12a of ring groove 12 and the inner ring surface 11 of housing 10, madial wall 13 has the radial exploration hole 11a of the through setting of radial direction along housing 10.Madial wall 13 due to housing 10 has the radial exploration hole 11a of the through setting of radial direction along housing 10, thus when radial direction probe 20 is arranged on after in radial exploration hole 11a, the installation stability of radial probe 20 can be ensured, thus ensure that the test accuracy of current vortex sensor.
In preferred implementation as shown in Figure 1 to Figure 3, form the lateral wall 15 of housing 10 between the outside cell wall 12b of ring groove 12 and the outer ring surface 14 of housing 10, lateral wall 15 has the cable-through hole 15a of the through setting of axis of radially exploration hole 11a.Because the lateral wall 15 at housing 10 arranges cable-through hole 15a, 20 signal wires be connected of thus popping one's head in radial direction pass outside to housing 10 by cable-through hole 15a.Because cable-through hole 15a and radial exploration hole 11a is coaxially arranged, thus can ensure that signal wire passes the outside to housing 10 with the shortest distance, thus effectively reduce the materials of signal wire, reduce the manufacturing cost of current vortex sensor.
Form the lateral wall 15 of housing 10 between the outside cell wall 12b of the ring groove 12 in the utility model and the outer ring surface 14 of housing 10, lateral wall 15 also has line opening 15b (please refer to Fig. 2 and Fig. 3) be excessively communicated with ring groove 12.Owing to being provided with line opening 15b, thus also with the signal wire that is connected of popping one's head in can crossing line opening 15b and passed outside to housing 10 by this, thus ensure that the Signal transmissions reliability of current vortex sensor.
As shown in Figure 1, current vortex sensor also comprises encapsulation part 30, and the space that encapsulation part 30 is filled in housing 10 forms solid circular cylinder to make housing 10.Preferably, by the method for plastic packaging by housing 10 and the overall plastic packaging of probe.Fill the space in housing 10 due to employing encapsulation part 30, thus probe can be fixed in housing 10, thus ensure that the installation stability of probe, and ensure that the detection stability of current vortex sensor.Preferably, encapsulation part 30 is plastics.The inner air of housing 10 and probe each solder joint upper all carry out overall embedding by plastics mating mold.Adopt embedding the gap etc. in housing 10 all can be filled up, thus improve the dependability of current vortex sensor.Because the housing 10 of the current vortex sensor after plastic packaging, each probe, cable, joint etc. become integral type, measuring stability and the stable signal transmission of current vortex sensor thus can be substantially increased.
Multiple probes in the utility model comprise at least one axial probe 40, and housing 10 has inner ring surface 11 and the radial end face 16 perpendicular with inner ring surface 11, and the end of probe of axial probe 40 is concordant with the radial end face 16 of housing 10.Owing to being provided with axial probe 40, thus can detect the axially-movable state of detected rotating shaft 80 in real time, thus ensure that the detection diversity of current vortex sensor and comprehensive.
In preferred implementation as shown in Figure 4, the end of probe of axial probe 40 is concordant with the radial end face 16 of housing 10, effectively can ensure the measuring accuracy of axial probe 40 like this.In this specific embodiment, axial probe 40 is arranged in ring groove 12, and the bottom land 12c of ring groove 12 has the axial mounting hole of through setting, and axial probe 40 is arranged in this axial mounting hole.
Multiple probes in the utility model comprise radial probe 20 and axial probe 40, and radial probe 20 is multiple, and multiple radial direction probe 20 is equally spaced arranged around the circumference of housing 10; Axial probe 40 is one, and axial probe 40 is positioned on the perpendicular bisector of the line of two the radial probes 20 be disposed adjacent.Namely this axial probe 40 and be disposed adjacent two radial radial distances of popping one's head between 20 of pop one's head in 20 equal the distance that this axial probe 40 and another radial direction are popped one's head between 20.Because multiple radial direction probe 20 is equally spaced arranged around the circumference of housing 10, the radial reliability detected thus effectively can be ensured.Because axial probe 40 is positioned on the perpendicular bisector of the line of two the radial probes 20 be disposed adjacent, thus the adjacent interference between two radial probes 20 can effectively be eliminated, avoid the biased test error caused of axial probe 40, thus ensure that the accuracy of detection of current vortex sensor.
Preferably, an axial probe 40 can meet test request, certainly, also can arrange multiple axial probe 40.
In preferred implementation as shown in Figure 4, radial probe 20 is four, in 90 degree between adjacent two radial probes 20.Namely four radial probes 20 are perpendicular to one another.Certainly, 6 or 8 radial probes 20 can also be selected.
Current vortex sensor in the utility model also comprises fore-lying device, and fore-lying device is electrically connected with probe, and fore-lying device is positioned at the outside of housing 10 and arranges with housing 10 is independent.Independently arrange due to fore-lying device and housing 10 and be positioned at the outside of housing 10, thus fore-lying device can be made as much as possible away from test environment, avoid each components and parts of fore-lying device by the impact of environment for use (pressure field, temperature field, electromagnetic field, oscillator field etc.), thus improve accuracy of detection and the reliability of current vortex sensor.Meanwhile, the volume of current vortex sensor can also be reduced.
Preferably, fore-lying device comprises control, the treatment circuit of sensor.Further, fore-lying device is installed on master control borad or separately and places.
Preferably, multiple probe also comprises metalwork 50 and compensates probe 60, and metalwork 50 arranges on the housing 10 and contacts with external environment, and the end of probe compensating probe 60 is arranged on metalwork 50 and (please refer to Fig. 5).Because metalwork 50 contacts with external environment, thus metalwork can sensing external environment temperature variation and produce self deformation, and compensate probe 60 and detect this kind of deformation using the compensating approach amount as radial direction probe 20 and axial probe 40.Utilize compensate probe 60 can detected temperatures, the impact of pressure change on probe output in real time, thus the test result of other probe to be compensated, reduces the impact that environmental factor test current vortex sensor, effectively the raising accuracy of testing.
Preferably, compensating probe 60 is also eddy current probe.
Further, metalwork 50 is metallic gasket.
Preferably, metalwork 50 is identical with the material of detected rotating shaft 80.
Current vortex sensor in the utility model also comprises range adjusting portion 70, and the end of probe compensating probe 60 is contacted with metalwork 50 by range adjusting portion 70.Owing to being provided with range adjusting portion 70, thus can the testing range compensating probe 60 being regulated, make it consistent with the range that other are popped one's head in.
Preferably, range adjusting portion 70 is plastic spacer.Plastic spacer mainly makes compensation probe 60 be in middle range position, because in unit real work, other all probe all operates mainly in middle range position, is equivalent to compensation probe 60 to pad up.
In preferred implementation as shown in Figure 5, housing 10 is loop configuration, and the inside of housing 10 has ring groove 12, the shoulder hole 17 that the bottom land 12c that housing 10 also has through ring groove 12 is arranged, and be greater than the aperture away from ring groove 12 side near the aperture of ring groove 12 side in shoulder hole 17, compensation probe 60 and metalwork 50 are arranged in shoulder hole 17, and metalwork 50 backstop is at the cascaded surface 17a place of shoulder hole 17.Because compensation probe 60 and metalwork 50 are arranged in shoulder hole 17, and metalwork 50 backstop is at the cascaded surface 17a place of shoulder hole 17, thus ensure that the installation steadiness compensating probe 60 and metalwork 50, thus ensure that the testing reliability of current vortex sensor.
In preferred implementation as shown in Figure 2 and Figure 6, four radial probes 20 are labeled as T1, T2, T4, T5 respectively.Wherein, 180 degree of symmetrical T1, T4 placed can test rotating shaft 80X direction displacement, and another can test rotating shaft 80Y direction displacement to 180 degree of symmetrical T2, T5 placed.Axial probe 40 is labeled as T3, and is positioned at the centre position of adjacent two radial probes 20, namely between T2 and T4.Compensate probe 60 and be labeled as T6 and the centre position being positioned at adjacent two radial probes 20, namely between T1 and T5.In the design of structure, what compensate probe 60 detection is a constant displacement, that export in theory is a steady state value V1, when temperature around current vortex sensor, pressure change, the output valve compensating probe 60 there will be drift, the steady state value V1 compensated before the real-time value V2 exported of probe 60 deducts is drift value V3, can carry out real-Time Compensation correction with this drift value to the output of other probe under this environment.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
1. the current vortex sensor in the utility model has the advantages that testing reliability is high, measuring accuracy is high.
2. the function that the current vortex sensor in the utility model has temperature drift compensation, pressure drift compensates, thus can be applied in the complicated test environment such as high temperature, high pressure.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (13)
1. a current vortex sensor, is characterized in that, comprising:
Housing (10);
Probe, described probe is multiple, multiple described probes are all arranged on the inside of described housing (10), and the end of probe of described probe is all in the inner side of the outside surface of described housing (10), with the outside surface avoiding the end of probe of described probe to protrude from described housing (10).
2. current vortex sensor according to claim 1, it is characterized in that, multiple described probe comprises multiple radial direction probe (20), described housing (10) has inner ring surface (11), described inner ring surface (11) has the radial exploration hole (11a) of dodging described radial direction probe (20), the end of probe of described radial direction probe (20) correspondingly with described radial exploration hole (11a) is arranged, and the end of probe of described radial pop one's head in (20) and described inner ring surface (11) tangent.
3. current vortex sensor according to claim 1, it is characterized in that, described housing (10) is loop configuration, and the inside of described housing (10) has ring groove (12), form the madial wall (13) of described housing (10) between the inner side cell wall (12a) of described ring groove (12) and the inner ring surface (11) of described housing (10), described madial wall (13) has the radial exploration hole (11a) of the through setting of radial direction along described housing (10).
4. current vortex sensor according to claim 3, it is characterized in that, form the lateral wall (15) of described housing (10) between the outside cell wall (12b) of described ring groove (12) and the outer ring surface (14) of described housing (10), described lateral wall (15) has the cable-through hole (15a) of the through setting of axis along described radial exploration hole (11a).
5. current vortex sensor according to claim 3, it is characterized in that, form the lateral wall (15) of described housing (10) between the outside cell wall (12b) of described ring groove (12) and the outer ring surface (14) of described housing (10), described lateral wall (15) also has line opening (15b) be excessively communicated with described ring groove (12).
6. current vortex sensor according to claim 3, it is characterized in that, described current vortex sensor also comprises encapsulation part (30), and the space that described encapsulation part (30) is filled in described housing (10) forms solid circular cylinder to make described housing (10).
7. current vortex sensor according to claim 1, it is characterized in that, multiple described probe comprises at least one axial probe (40), described housing (10) has inner ring surface (11) and the radial end face (16) perpendicular with described inner ring surface (11), and the end of probe of described axial probe (40) is concordant with the described radial end face (16) of described housing (10).
8. current vortex sensor according to claim 1, is characterized in that, multiple described probe comprises:
Radial probe (20), described radial direction probe (20) is for multiple, and multiple described radial direction probe (20) is equally spaced arranged around the circumference of described housing (10);
Axial probe (40), described axial probe (40) is one, and described axial probe (40) is positioned on the perpendicular bisector of the line of two described radial directions probe (20) be disposed adjacent.
9. current vortex sensor according to claim 1, it is characterized in that, described current vortex sensor also comprises fore-lying device, and described fore-lying device is electrically connected with described probe, and described fore-lying device is positioned at the outside of described housing (10) and arranges with described housing (10) is independent.
10. current vortex sensor according to claim 1, is characterized in that, multiple described probe also comprises:
Metalwork (50), described metalwork (50) is arranged on described housing (10) and goes up and contact with external environment;
Compensate probe (60), the described end of probe compensating probe (60) is arranged on described metalwork (50).
11. current vortex sensors according to claim 10, it is characterized in that, described current vortex sensor also comprises range adjusting portion (70), and the described end of probe compensating probe (60) is contacted with described metalwork (50) by described range adjusting portion (70).
12. current vortex sensors according to claim 10, it is characterized in that, described housing (10) is loop configuration, and the inside of described housing (10) has ring groove (12), the shoulder hole (17) that the bottom land (12c) that described housing (10) also has through described ring groove (12) is arranged, and be greater than the aperture away from described ring groove (12) side near the aperture of described ring groove (12) side in described shoulder hole (17), described compensation probe (60) and described metalwork (50) are arranged in described shoulder hole (17), and described metalwork (50) backstop is at cascaded surface (17a) place of described shoulder hole (17).
13. current vortex sensors according to claim 10, is characterized in that, described metalwork (50) is identical with the material of detected rotating shaft (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420761663.0U CN204240938U (en) | 2014-12-04 | 2014-12-04 | Current vortex sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420761663.0U CN204240938U (en) | 2014-12-04 | 2014-12-04 | Current vortex sensor |
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| CN204240938U true CN204240938U (en) | 2015-04-01 |
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| CN201420761663.0U Active CN204240938U (en) | 2014-12-04 | 2014-12-04 | Current vortex sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066857A (en) * | 2015-05-27 | 2015-11-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Shaft position detection device and magnetic levitation motor |
| WO2016086662A1 (en) * | 2014-12-04 | 2016-06-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current sensor |
| CN110214276A (en) * | 2017-01-20 | 2019-09-06 | 日本精机株式会社 | Eddy current type instrument |
| WO2021068663A1 (en) * | 2019-10-08 | 2021-04-15 | 珠海格力电器股份有限公司 | Flat disc six-dimensional force sensor based on eddy current effect, detection method, and smart device |
-
2014
- 2014-12-04 CN CN201420761663.0U patent/CN204240938U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086662A1 (en) * | 2014-12-04 | 2016-06-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current sensor |
| CN105716515A (en) * | 2014-12-04 | 2016-06-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Current vortex sensor |
| US10209095B2 (en) | 2014-12-04 | 2019-02-19 | Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai | Eddy current sensor |
| CN105066857A (en) * | 2015-05-27 | 2015-11-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Shaft position detection device and magnetic levitation motor |
| CN105066857B (en) * | 2015-05-27 | 2018-05-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Shaft position detection device and magnetic suspension motor |
| CN110214276A (en) * | 2017-01-20 | 2019-09-06 | 日本精机株式会社 | Eddy current type instrument |
| WO2021068663A1 (en) * | 2019-10-08 | 2021-04-15 | 珠海格力电器股份有限公司 | Flat disc six-dimensional force sensor based on eddy current effect, detection method, and smart device |
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