CN205228371U - Linear displacement sensor based on become magnetic resistance principle - Google Patents
Linear displacement sensor based on become magnetic resistance principle Download PDFInfo
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- CN205228371U CN205228371U CN201520837804.7U CN201520837804U CN205228371U CN 205228371 U CN205228371 U CN 205228371U CN 201520837804 U CN201520837804 U CN 201520837804U CN 205228371 U CN205228371 U CN 205228371U
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- linear displacement
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Abstract
The utility model discloses a linear displacement sensor based on become magnetic resistance principle, including elementary subassembly and secondary subassembly, elementary subassembly includes elementary iron core and winding, set up the tooth post of ribbon winding on elementary iron core, secondary subassembly only adopts secondary iron core, elementary length unshakable in one's determination is less than the length of secondary iron core, and there is the air gap between elementary iron core and the secondary iron core, thus, when elementary iron core is drawn the removal, the air gap size changes, the magnetic resistance changes in arousing the magnetic circuit, thereby lead to inductance coils's inductance value to change, thereby just make, the output voltage of cosine signal output winding is just pressing, the cosine law changes, and then the size and orientation of definite elementary displacement unshakable in one's determination volume, realize measuring linear displacement, the precision height has, high reliability, the adaptation environment can the reinforce, and small in size, moreover, the steam generator is simple in structure, low price, etc..
Description
Technical field
The utility model relates to rectilinear transducer, especially a kind of linear displacement transducer based on becoming reluctance principle.
Background technology
At present, the sensor measuring straight-line displacement mainly contains the sensor of grating scale, magnetic railings ruler and some electric capacity, inductance, especially grating scale is widely used in straight-line displacement measurement and the detection of linear servo-actuator position, but grating scale principle features and architectural characteristic determine it to be required higher to environment for use, as dust, oil stain and stronger shock and vibration all may make its deterioration in accuracy or damage, simultaneously also more complicated, cost are higher for structure.
Utility model content
In order to solve the problems of the technologies described above, a kind of linear displacement transducer based on change reluctance principle being applicable to linear servo, the detection of drive motor system secondary location that the utility model provides, accuracy of detection is high, practical reliable.
To achieve these goals, the technical scheme that the utility model adopts is:
A kind of linear displacement transducer based on becoming reluctance principle, comprise primary component and secondary component, described primary component comprises elementary iron core and winding, described elementary iron core is arranged with several tooth posts, described winding is arranged on tooth post by insulating part, described secondary component is secondary iron core, described secondary iron core is provided with the teeth groove corresponding with tooth post, teeth groove is made up of projection spaced apart and groove, the length of described elementary iron core is less than the length of secondary iron core and spaced apart formation one air gap of elementary iron core and secondary iron core, the number of described elementary corresponding secondary iron core projection unshakable in one's determination is the number of pole-pairs of linear displacement transducer and the number of pole-pairs of elementary iron core, this number of pole-pairs can be 1, 2, 3, 4, 5, 6 etc.
In said structure, described tooth post is spacedly distributed along elementary iron core, and the number of described tooth post is set to be more than or equal to 4, concrete, and tooth post is distributed on an elementary iron core side relative with secondary iron core.
In said structure, the external member that described insulating part is insulation framework or is made by insulating material.
In said structure, described teeth groove is made up of the projection spaced apart be arranged in secondary iron core and groove, the outline line of described projection and/or groove is circular arc, namely protruding is whole section of circular arc with the outline line of groove, form Wave-shaped structural, or outline line that is protruding and groove is made up of several sections of circular arcs.
Preferably, described winding comprises field winding and signal and exports winding, and described field winding is evenly distributed on tooth post, and the number of turn that described signal exports winding is according to number of pole-pairs and tooth post number and be arranged on tooth post by sinusoidal rule.
Preferably, described signal exports winding is that cosine signal exports winding and sinusoidal signal exports winding.
Preferred, the flute profile between described tooth post is rectangle, pyriform or trapezoidal.
In said structure, the minimum widith scope of described air gap is between 0.1-2mm.
During work, secondary iron core is fixed, elementary iron core be connected to need measure straight-line displacement equipment on, when elementary iron core is pulled mobile, void dimension changes, cause magnetic resistance change rate in magnetic circuit, thus make just, the cosine signal output voltage that exports winding by just, the change of cosine rule, and then determine the size and Orientation of elementary displacement unshakable in one's determination.
The beneficial effects of the utility model: this linear displacement transducer is the sensor realizing Non-Electricity Measurement based on change reluctance principle, elementary iron core arranges the tooth post of band winding, secondary component only adopts secondary iron core, air gap is there is between elementary iron core and secondary iron core, like this, when elementary iron core is pulled mobile, void dimension changes, cause magnetic resistance change rate in magnetic circuit, thus just make, the output voltage that cosine signal exports winding is just being pressed, cosine rule changes, and then determine the size and Orientation of elementary displacement unshakable in one's determination, realize measuring straight-line displacement, and secondary iron core is longer than elementary iron core, measure displacement range wider, there is precision high, reliability is high, accommodative ability of environment is strong, volume is little, structure is simple, the advantages such as price is low, be suitable as very much linear displacement detecting element in brushless linear direct current generator isoline servo drive motor system, also can be used for bad environments, in the displacement measurement system that reliability requirement is high.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 is structure principle chart of the present utility model.
Embodiment
With reference to Fig. 1, a kind of linear displacement transducer based on becoming reluctance principle of the present utility model, comprise primary component and secondary component, primary component comprises elementary unshakable in one's determination 1 and winding 13, this is arranged with several tooth posts 11 on elementary unshakable in one's determination 1, winding 13 is arranged on tooth post 11 by insulating part 12, and this winding 13 is primary coil; Secondary component is secondary iron core 2, secondary iron core 2 is without the need to winding around, this secondary iron core 2 is provided with the teeth groove corresponding with tooth post 11, the elementary length of unshakable in one's determination 1 is less than the length of secondary iron core 2, and elementary unshakable in one's determination 1 with spaced apart formation one air gap 3 of secondary iron core 2, the number of secondary iron core 2 projection of elementary 1 correspondence unshakable in one's determination is the number of pole-pairs of linear displacement transducer and the elementary number of pole-pairs of unshakable in one's determination 1, and this number of pole-pairs can be 1,2,3,4,5,6 etc.During assembling, secondary component is fixed on the housing of sensor, primary component is connected with motion parts in sensor, the minimum widith scope of air gap 3 is between 0.1-2mm, realize based on the principle becoming magnetic resistance, simple and practical, have long service life, highly sensitive resolution large, output signal the advantages such as strong, reproducible, the linearity is excellent.
In this embodiment, tooth post 11 is spacedly distributed along elementary unshakable in one's determination 1, concrete, and tooth post 11 is distributed on elementary unshakable in one's determination 1 side relative with secondary iron core 2, and the number of tooth post 11 is set to be more than or equal to 4, and embodiment is provided with 6 tooth posts 11.Adopt insulation framework as insulating part 12, insulation framework is connected on tooth post 11, and winding 13 is arranged in insulation framework.Preferably, the flute profile between tooth post 11 is rectangle, pyriform or trapezoidal.
In said structure, the teeth groove that secondary iron core 2 is arranged is corresponding with tooth post 11, this teeth groove is made up of the projection 21 spaced apart be arranged in secondary iron core 2 and groove 22, and in embodiment, protruding 21 are circular arc with the outline line of groove 22, namely protruding 21 is whole section of circular arc with the outline line of groove 22, form Wave-shaped structural, as shown in Figure 1, in addition, the outline line of projection 21 and groove 22 can also be made up of several sections of circular arcs, and namely protruding 21 is not adopt arc transition with the outline line of groove 22 entirely.
Preferably, above-mentioned winding 13 comprises field winding and signal exports winding, field winding is evenly distributed on tooth post 11, R1 in accompanying drawing 1, R2 is respectively the leading-out terminal of field winding, the number of turn that signal exports winding is according to number of pole-pairs and tooth post 11 number and be arranged on tooth post 11 by sinusoidal rule, and this signal output winding is cosine signal output winding and sinusoidal signal output winding, namely cosine signal exports umber of turn and sinusoidal signal output umber of turn foundation number of pole-pairs and tooth post 11 number and is arranged on tooth post 11 by sinusoidal rule, S1 in accompanying drawing 1, S2 is respectively the leading-out terminal that sinusoidal signal exports winding, S3, S4 is respectively the leading-out terminal that cosine signal exports winding.
During work, secondary iron core 2 is fixed, elementary unshakable in one's determination 1 be connected to need measure straight-line displacement equipment on, when elementary unshakable in one's determination 1 is pulled mobile, air gap 3 size changes, cause magnetic resistance change rate in magnetic circuit, thus just make, the output voltage that cosine signal exports winding is just being pressed, cosine rule changes, and then determine the size and Orientation of elementary 1 displacement unshakable in one's determination, realize measuring straight-line displacement, structure is practical reliable, measuring accuracy is high, output signal is strong, reproducible, the linearity is excellent, be suitable as very much linear displacement detecting element in brushless linear direct current generator isoline servo drive motor system, also can be used for bad environments, in the displacement measurement system that reliability requirement is high.Simultaneously in order to applicable drive motor Systematical control, its magnetic pole number of pole-pairs also must change along with the difference of motor number of pole-pairs.
The above; just preferred embodiment of the present utility model; the utility model is not limited to the shape and structure mentioned in above-described embodiment, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection domain of the present utility model.
Claims (8)
1. the linear displacement transducer based on change reluctance principle, comprise primary component and secondary component, it is characterized in that: described primary component comprises elementary iron core (1) and winding (13), described elementary iron core (1) is arranged with several tooth posts (11), described winding (13) is arranged on tooth post (11) by insulating part (12), described secondary component is secondary iron core (2), described secondary iron core (2) is provided with the teeth groove corresponding with tooth post (11), teeth groove is made up of projection (21) spaced apart and groove (22), the length of described elementary iron core (1) is less than the length of secondary iron core (2) and spaced apart formation one air gap (3) of elementary iron core (1) and secondary iron core (2), the number of secondary iron core (2) projection that described elementary iron core (1) is corresponding is the number of pole-pairs of linear displacement transducer and the number of pole-pairs of elementary iron core (1).
2. a kind of linear displacement transducer based on becoming reluctance principle according to claim 1, it is characterized in that: described tooth post (11) is spacedly distributed along elementary iron core (1), the number of described tooth post (11) is set to be more than or equal to 4.
3. according to claim 1 a kind of based on becoming the linear displacement transducer of reluctance principle, it is characterized in that: described insulating part (12) is insulation framework or the external member made by insulating material.
4. a kind of linear displacement transducer based on becoming reluctance principle according to claim 1, is characterized in that: the outline line of described projection (21) and/or groove (22) is circular arc.
5. a kind of linear displacement transducer based on becoming reluctance principle according to claim 1, it is characterized in that: described winding (13) comprises field winding and signal exports winding, described field winding is evenly distributed on tooth post (11), and the number of turn that described signal exports winding is according to number of pole-pairs and tooth post (11) number and be arranged on tooth post (11) by sinusoidal rule.
6. a kind of linear displacement transducer based on becoming reluctance principle according to claim 5, is characterized in that: it is that cosine signal exports winding and sinusoidal signal exports winding that described signal exports winding.
7., according to the arbitrary described a kind of linear displacement transducer based on becoming reluctance principle of claim 1-6, it is characterized in that: the flute profile between described tooth post (11) is rectangle, pyriform or trapezoidal.
8. a kind of linear displacement transducer based on becoming reluctance principle according to claim 1, is characterized in that: the minimum widith scope of described air gap (3) is between 0.1-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520837804.7U CN205228371U (en) | 2015-10-23 | 2015-10-23 | Linear displacement sensor based on become magnetic resistance principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520837804.7U CN205228371U (en) | 2015-10-23 | 2015-10-23 | Linear displacement sensor based on become magnetic resistance principle |
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| CN205228371U true CN205228371U (en) | 2016-05-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222698A (en) * | 2015-10-23 | 2016-01-06 | 江门职业技术学院 | A kind of linear displacement transducer based on becoming reluctance principle |
| CN106441064A (en) * | 2016-11-02 | 2017-02-22 | 广东百合医疗科技股份有限公司 | Method for measuring displacement through magnetic gap and equipment thereof |
-
2015
- 2015-10-23 CN CN201520837804.7U patent/CN205228371U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222698A (en) * | 2015-10-23 | 2016-01-06 | 江门职业技术学院 | A kind of linear displacement transducer based on becoming reluctance principle |
| CN106441064A (en) * | 2016-11-02 | 2017-02-22 | 广东百合医疗科技股份有限公司 | Method for measuring displacement through magnetic gap and equipment thereof |
| CN106441064B (en) * | 2016-11-02 | 2020-01-31 | 广东百合医疗科技股份有限公司 | method and equipment for measuring displacement by magnetic seam |
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