CN207066462U - A kind of LVDT displacement transducers - Google Patents
A kind of LVDT displacement transducers Download PDFInfo
- Publication number
- CN207066462U CN207066462U CN201721033374.9U CN201721033374U CN207066462U CN 207066462 U CN207066462 U CN 207066462U CN 201721033374 U CN201721033374 U CN 201721033374U CN 207066462 U CN207066462 U CN 207066462U
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- China
- Prior art keywords
- guide rod
- coil
- displacement transducers
- screw
- magnetic
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Abstract
The utility model discloses a kind of LVDT displacement transducers.The displacement transducer includes fixed part and movable part, the fixed part includes coil rack, primary coil is provided with the coil rack, the primary coil both sides are symmetrically arranged with identical first secondary coil and second subprime coil, the first secondary coil and second subprime coil differential connection；The movable part includes the first guide rod, in the first guide rod insertion coil rack, the first guide rod is connected with the second guide rod by the first screw, and the other end is provided with and the first screw size, the screw of position identical second, second guide rod is non-magnetic guide rod, and the first guide rod is magnetic conductivity guide rod.The utility model is by being both provided with two size identical screws at the first guide rod both ends and the second guide rod uses non-magnetic guide rod, first guide rod is magnetic conduction guide rod, it ensure that the magnetic flux at the first guide rod both ends is equal, relatively low residual voltage at zero be present, there is high accuracy.
Description
Technical field
Displacement transducer technology is the utility model is related to, more particularly to a kind of LVDT displacement transducers.
Background technology
Existing LVDT displacement transducers are most widely used with three-stage, structure composition have coil rack, primary coil,
Two secondary coils, the first guide rod and guide rod.Two secondary coils are identical, and are symmetrically dispersed in primary coil both sides.
First guide rod is soft magnetic materials, and its one end is connected with outside guide rod.Two secondary coil differential connections, one is passed in primary coil
After the voltage or current excitation signal of determining frequency, alternating magnetic field is produced, two identical secondary coils will be in primary
In alternating magnetic field caused by coil, so as to produce certain induced electromotive force.Because two secondary coils are differential, therefore LVDT
Output signal for the induced electromotive force of two secondary coils difference.It can thus be seen that the structure of the first guide rod and its in bone
Position in frame will influence the distribution in whole magnetic field, and the mutual inductance of primary coil and two secondary coils will be with the first guide rod in skeleton
Interior movement and respective change.
Existing LVDT displacement transducers are connected by opening screw on the first guide rod, by the first guide rod with the second guide rod,
First guide rod both ends and Non-completety symmetry structure, and the second guide rod is magnetic conductive material.The connected mode and material of guide rod are led
Cause the magnetic flux at the first guide rod both ends to differ, cause sensor higher residual voltage at zero to be present, have impact on LVDT displacements
The accuracy of sensor.
Utility model content
The purpose of this utility model is to provide that a kind of residual voltage at zero is smaller, has the LVDT displacements of high accuracy
Sensor.
To achieve these goals, a kind of technical scheme of LVDT displacement transducers of the utility model is：
A kind of LVDT displacement transducers, it is characterised in that：Including fixed part and movable part, the fixed part includes
Coil rack, primary coil is provided with the coil rack, the primary coil both sides are symmetrically arranged with identical
One secondary coil and second subprime coil, the first secondary coil and second subprime coil differential connection；The movable part includes
Guide rod, the guide rod include the first guide rod and the second guide rod, and first guide rod is inserted in coil rack, first guide rod one
End is affixed by the first screw and the second guide rod, and the other end is provided with and the first screw size, the screw of position identical second, institute
It is magnetic conduction guide rod to state the first guide rod, and second guide rod is non-magnetic guide rod.First guide rod is provided at both ends with size identical spiral shell
Hole, the second guide rod use non-permeable material, ensure that the first guide rod both ends magnetic flux is identical so that the zero point of sensor is remaining
Voltage is relatively low, ensure that the accuracy of sensor.
Further, the coil rack is connected with the back-moving spring back-up ring being nested with the outside of the second guide rod, the second guide rod
End set have boss, be provided with back-moving spring between boss and back-moving spring back-up ring.Back-moving spring and back-moving spring back-up ring
The second guide rod and the first guide rod can be made to automatically reset, and pressure size can be measured according to the displacement of spring.
Further, the fixed part also includes resistance to crimp body, and described resistance to crimp body one end is provided with high-pressure seal ring,
The other end is fixedly connected with coil rack, and second guide rod is inserted in resistance to crimp body and moved in resistance to crimp body.Resistance to crimping
Body one end is provided with high-pressure seal ring, and the second guide rod moves in resistance to crimp body so that this LVDT sensor can be in height
Pressure ring uses in border.
Further, second guide rod is 321 stainless steel guide rods.321 stainless steels are austenitic stainless steel, have non-lead
Magnetic, and can have the characteristics such as resistance to abrasion, high temperature resistant, creep resistance, expand the suitable environment of LVDT sensors.
Further, first guide rod is 1J50 iron-nickel alloy guide rods.1J50 iron-nickel alloys are high-performance permeability magnetic material,
Be advantageous to accurately detect Electromotive Difference Of Potential.
Compared with prior art, the beneficial effects of the utility model are：
The utility model at the first guide rod both ends by being both provided with two size identical screws and the second guide rod is adopted
With non-permeable material, it ensure that the magnetic flux at the first guide rod both ends is equal, relatively low residual voltage at zero be present, have compared with Gao Zhun
True property.
Brief description of the drawings
Fig. 1 is a kind of structural representation of LVDT displacement transducers of the utility model.
Fig. 2 is a kind of schematic diagram of LVDT displacement transducers of the utility model.
Fig. 3 is a kind of structural representation of the specific embodiment 2 of LVDT displacement transducers of the utility model.
Fig. 4 is a kind of structural representation of the specific embodiment 3 of LVDT displacement transducers of the utility model.
Shown in figure：1st, coil rack；2nd, the first secondary coil；3rd, primary coil；4th, second subprime coil；5th, first lead
Bar；6th, the second guide rod；7th, back-moving spring；8th, back-moving spring back-up ring；9th, the second screw；10th, boss；11st, resistance to crimp body；12nd, it is high
Pressure seal ring；13rd, the first screw.
Embodiment
With reference to the accompanying drawings and detailed description, the utility model is furtherd elucidate, it should be understood that these embodiments are only
For illustrating the utility model rather than limitation the scope of the utility model, after the utility model has been read, this area
Modification of the technical staff to the various equivalent form of values of the present utility model falls within the application appended claims limited range.
Specific embodiment 1:
As depicted in figs. 1 and 2, a kind of LVDT displacement transducers include coil rack 1, and primary is provided with coil rack 1
Coil 3.The both sides of primary coil 3 are symmetrically arranged with the first secondary coil 2 and second subprime coil of identical differential connection
4.In first guide rod 5 insertion coil rack 1, the one end of the first guide rod 5 is fixedly connected by the first screw 13 with the second guide rod 6, separately
One end is provided with one and the size of the first screw 13, position all the second screws of identical 9.
Second guide rod 6 for 321 stainless steel guide rods, there is non-magnetic, and can have resistance to abrasion, high temperature resistant,
The characteristics such as creep resistance, expand the suitable environment of LVDT sensors.
The material of first guide rod 5 is 1J50 iron-nickel alloys.1J50 iron-nickel alloys are high-performance permeability magnetic material, are advantageous to accurately examine
Survey Electromotive Difference Of Potential.
Specific embodiment 2：
As shown in figure 3, a kind of LVDT displacement transducers include coil rack 1, primary coil 3 is provided with coil rack 1.
The both sides of primary coil 3 are symmetrically arranged with the first secondary coil 2 and second subprime coil 4 of identical differential connection.First
Guide rod 5 is inserted in coil rack 1, and the one end of the first guide rod 5 is fixedly connected by the first screw 13 with the second guide rod 6, and the other end is set
It is equipped with one and the size of the first screw 13, position all the second screws of identical 9.
Second guide rod 6 for 321 stainless steel guide rods, there is non-magnetic, and can have resistance to abrasion, high temperature resistant,
The characteristics such as creep resistance, expand the suitable environment of LVDT sensors.
The material of first guide rod 5 is 1J50 iron-nickel alloys.1J50 iron-nickel alloys are high-performance permeability magnetic material, are advantageous to accurately examine
Survey Electromotive Difference Of Potential.
Coil rack 1 is connected with the back-moving spring back-up ring 8 being nested with the outside of the second guide rod 6, the end set of the second guide rod 6
There is boss 10, back-moving spring 7 is provided between boss 10 and back-moving spring back-up ring 8.Back-moving spring 7 can make the second guide rod 6 certainly
It is dynamic to reset, and back-moving spring 7 can produce corresponding deformation displacement according to the pressure of the side of the second guide rod 6, pass through LVDT displacements
Sensor measurement displacement can measure pressure size.
Specific embodiment 3：
As shown in figure 3, a kind of LVDT displacement transducers include coil rack 1, primary coil 3 is provided with coil rack 1.
The both sides of primary coil 3 are symmetrically arranged with the first secondary coil 2 and second subprime coil 4 of identical differential connection.First
Guide rod 5 is inserted in coil rack 1, and the one end of the first guide rod 5 is fixedly connected by screw with the second guide rod 6, and the other end is provided with one
The individual and size of the first screw 13, position all the second screws of identical 9.
Second guide rod 6 for 321 stainless steel guide rods, there is non-magnetic, and can have resistance to abrasion, high temperature resistant,
The characteristics such as creep resistance, expand the suitable environment of LVDT sensors.
The material of first guide rod 5 is 1J50 iron-nickel alloys.1J50 iron-nickel alloys are high-performance permeability magnetic material, are advantageous to accurately examine
Survey Electromotive Difference Of Potential.
Coil rack 1 is connected with the back-moving spring back-up ring 8 being nested with the outside of the second guide rod 6, the end set of the second guide rod 6
There is boss 10, back-moving spring 7 is provided between boss 10 and back-moving spring back-up ring 8.Back-moving spring 7 can make the first guide rod 5 certainly
It is dynamic to reset, and back-moving spring 7 can produce corresponding deformation displacement according to the pressure of the side of the second guide rod 6, pass through LVDT displacements
Sensor measurement displacement can measure pressure size.
The one end of coil rack 1 is fixedly connected with resistance to crimp body 11, and the second guide rod 6 is inserted inside resistance to crimp body 11.Resistance to crimping
The end set of body 11 has high-pressure seal ring 12, and the second guide rod 6 moves in resistance to crimp body 11.By being socketed resistance to crimp body 11, make
Obtaining LVDT displacement transducers can use in hyperbaric environment.
A kind of concrete principle of LVDT displacement transducers of the utility model is as follows：
After primary coil 3 applies pumping signal, identical first secondary coil 2 in both sides and the meeting of second subprime coil 4
Sense the alternating signal of identical frequency, two secondary coil differential connections.When the first guide rod 5 is in original position, first level
The Electromotive Difference Of Potential of coil 2 and second subprime coil 4 is 0.When the first guide rod 5 is by the second 6 push-and-pull of guide rod, two secondary coils with
The coupling of primary coil 3 changes, so that two secondary coil output voltages are inclined by sinusoidal, varies with cosine, the first guide rod 5
Bigger among moving, the amplitude of electromotive force difference is bigger.By measuring Electromotive Difference Of Potential, the first guide rod 5 and the second guide rod 6 can be obtained
Displacement.
Claims (5)
- A kind of 1. LVDT displacement transducers, it is characterised in that：Including fixed part and movable part, the fixed part includes line Ring framework, primary coil is provided with the coil rack, the primary coil both sides are symmetrically arranged with identical first Secondary coil and second subprime coil, the first secondary coil and second subprime coil differential connection；The movable part includes leading Bar, the guide rod include the first guide rod and the second guide rod, and first guide rod is inserted in coil rack, first guide rod It is affixed by the first screw and the second guide rod, the other end be provided with the first screw size, the screw of position identical second, it is described First guide rod is magnetic conduction guide rod, and second guide rod is non-magnetic guide rod.
- A kind of 2. LVDT displacement transducers according to claim 1, it is characterised in that：The coil rack, which is connected with, to be nested with Back-moving spring back-up ring on the outside of the second guide rod, the end set of the second guide rod has boss, between boss and back-moving spring back-up ring It is provided with back-moving spring.
- A kind of 3. LVDT displacement transducers according to claim 1, it is characterised in that：The fixed part also includes pressure-resistant Junctor, described resistance to crimp body one end are provided with high-pressure seal ring, and the other end is fixedly connected with coil rack, and second guide rod is inserted Enter in resistance to crimp body and moved in resistance to crimp body.
- A kind of 4. LVDT displacement transducers according to claim 1, it is characterised in that：Second guide rod is 321 stainless Steel guide rod.
- A kind of 5. LVDT displacement transducers according to claim 1, it is characterised in that：First guide rod is 1J50 iron nickel Alloy guide rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721033374.9U CN207066462U (en) | 2017-08-17 | 2017-08-17 | A kind of LVDT displacement transducers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721033374.9U CN207066462U (en) | 2017-08-17 | 2017-08-17 | A kind of LVDT displacement transducers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207066462U true CN207066462U (en) | 2018-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721033374.9U Expired - Fee Related CN207066462U (en) | 2017-08-17 | 2017-08-17 | A kind of LVDT displacement transducers |
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| Country | Link |
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| CN (1) | CN207066462U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562215A (en) * | 2018-05-30 | 2018-09-21 | 精量电子（深圳）有限公司 | A kind of iron core piece and iron core link assembly and displacement sensor |
| CN114427824A (en) * | 2021-12-16 | 2022-05-03 | 洛阳轴承研究所有限公司 | Method for measuring axial displacement of magnetic bearing rotor |
-
2017
- 2017-08-17 CN CN201721033374.9U patent/CN207066462U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562215A (en) * | 2018-05-30 | 2018-09-21 | 精量电子（深圳）有限公司 | A kind of iron core piece and iron core link assembly and displacement sensor |
| CN114427824A (en) * | 2021-12-16 | 2022-05-03 | 洛阳轴承研究所有限公司 | Method for measuring axial displacement of magnetic bearing rotor |
| CN114427824B (en) * | 2021-12-16 | 2023-07-25 | 洛阳轴承研究所有限公司 | Magnetic bearing rotor axial displacement measurement method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180302 Termination date: 20190817 |
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| CF01 | Termination of patent right due to non-payment of annual fee |