CN205102766U - Novel non -contact linear displacement sensor - Google Patents
Novel non -contact linear displacement sensor Download PDFInfo
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- CN205102766U CN205102766U CN201520838550.0U CN201520838550U CN205102766U CN 205102766 U CN205102766 U CN 205102766U CN 201520838550 U CN201520838550 U CN 201520838550U CN 205102766 U CN205102766 U CN 205102766U
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- iron core
- winding
- linear displacement
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- tooth post
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Abstract
The utility model discloses a novel non -contact linear displacement sensor, 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 greater than the length of secondary iron core, and there is the air gap between elementary iron core and the secondary iron core, thus, when secondary iron core is pull the removal, the air gap size changes, the magnetic resistance changes in arousing the magnetic circuit, 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 secondary displacement unshakable in one's determination volume, realize measuring linear displacement, have brushlessization simultaneously, high precision, 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 novel non-contact linear displacement transducer.
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 novel non-contact linear displacement transducer, 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 greater 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 the projection in described secondary iron core is the number of pole-pairs of linear displacement transducer, the number of pole-pairs of the elementary core portion that described secondary iron core is corresponding is consistent with secondary iron core number of pole-pairs, namely elementary iron core is identical with the number of pole-pairs of the corresponding part of secondary 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, the outline line of described projection and/or groove is circular arc, and namely protruding is whole section of circular arc with the outline line of groove, forms 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 described signal exports umber of turn according to number of pole-pairs and tooth post number corresponding to secondary iron core and is 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, elementary iron core is fixed, secondary iron core be connected to need measure straight-line displacement equipment on, when secondary 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 secondary iron core displacement.
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 secondary iron core is pulled mobile, air gap thickness 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 secondary iron core displacement, realize measuring straight-line displacement, and elementary iron core is longer than secondary iron core, measurement sensistivity is higher, there is non-brushing simultaneously, precision is high, reliability is high, accommodative ability of environment is strong, volume is little, structure is simple, the advantages such as price is low.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 is structural principle schematic diagram of the present utility model.
Embodiment
With reference to Fig. 1, a kind of novel non-contact linear displacement transducer 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, this teeth groove is made up of projection 21 spaced apart and groove 22, the elementary length of unshakable in one's determination 1 is greater 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.
In this embodiment, the number of the projection 21 in secondary iron core 2 is set as the number of pole-pairs of linear displacement transducer, the number of pole-pairs of 1 part elementary unshakable in one's determination of secondary iron core 2 correspondence is consistent with secondary iron core 2 number of pole-pairs, namely elementary iron core is identical with the number of pole-pairs of the corresponding part of secondary iron core, and this number of pole-pairs can be 1,2,3,4,5,6 etc.During installation, primary component is fixed on the housing of sensor, secondary 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 18 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, in embodiment, protruding 21 are circular arc with the outline line of groove 22, and namely protruding 21 is whole section of circular arc with the outline line of groove 22, forms 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, signal exports winding and is arranged on tooth post 11 by sinusoidal rule according to number of pole-pairs and tooth post 11 number, 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 secondary iron core 2 corresponding teeth 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 cosine signal exports winding, S3, S4 is respectively the leading-out terminal that sinusoidal signal exports winding.
During work, elementary unshakable in one's determination 1 fixes, secondary iron core 2 be connected to need measure straight-line displacement equipment on, when secondary iron core 2 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 secondary iron core displacement, 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 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. a novel non-contact linear displacement transducer, 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 greater 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 the projection in described secondary iron core (2) is the number of pole-pairs of linear displacement transducer, the number of pole-pairs of elementary iron core (1) part that described secondary iron core (2) is corresponding is consistent with secondary iron core (2) number of pole-pairs.
2. a kind of novel non-contact linear displacement transducer according to claim 1, is characterized in that: described tooth post (11) is spacedly distributed along elementary iron core (1), and the number of described tooth post (11) is set to be more than or equal to 4.
3. a kind of novel non-contact linear displacement transducer according to claim 1, is characterized in that: described insulating part (12) is insulation framework or the external member made by insulating material.
4. a kind of novel non-contact linear displacement transducer 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 novel non-contact linear displacement transducer 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 corresponding to secondary iron core (2) and be arranged on tooth post by sinusoidal rule.
6. a kind of novel non-contact linear displacement transducer 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 novel non-contact linear displacement transducer 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 novel non-contact linear displacement transducer according to claim 1, is characterized in that: the minimum widith scope of described air gap (3) is between 0.1-2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520838550.0U CN205102766U (en) | 2015-10-23 | 2015-10-23 | Novel non -contact linear displacement sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520838550.0U CN205102766U (en) | 2015-10-23 | 2015-10-23 | Novel non -contact linear displacement sensor |
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| CN205102766U true CN205102766U (en) | 2016-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222697A (en) * | 2015-10-23 | 2016-01-06 | 江门职业技术学院 | A kind of novel non-contact linear displacement transducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222697A (en) * | 2015-10-23 | 2016-01-06 | 江门职业技术学院 | A kind of novel non-contact linear displacement transducer |
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