CN207407809U - A kind of contactless absolute displacement transducer - Google Patents
A kind of contactless absolute displacement transducer Download PDFInfo
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- CN207407809U CN207407809U CN201721641210.4U CN201721641210U CN207407809U CN 207407809 U CN207407809 U CN 207407809U CN 201721641210 U CN201721641210 U CN 201721641210U CN 207407809 U CN207407809 U CN 207407809U
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- coil
- displacement transducer
- receiving coil
- absolute displacement
- receiving
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Abstract
A kind of contactless absolute displacement transducer, including pedestal, is fixed with detection unit on pedestal, further includes metal block, the metal block is closely coupled with testee, acts simultaneously；The detection unit includes excitation coil and receiving coil, and there are two the receiving coil is set, excitation coil is equipped in the periphery of receiving coil；Excitation coil and receiving coil are connected with microprocessor；The receiving coil is also connected with receiving circuit, and the excitation coil is also connected with exciting circuit.The utility model provides a kind of contactless absolute displacement transducer, can realize the influence of non-contact measurement and immune stray magnetic field, and the requirement based on sensing without magnet reduces cost.In addition, also there is high-precision, wide operating temperature, ultrathin design.
Description
Technical field
The utility model is related to a kind of displacement sensors, particularly a kind of contactless absolute displacement transducer.
Background technology
The function of linear displacement transducer is the mechanical displacement of object being converted to electric signal, and currently used is base
In Hall element, movement detects magnetic field size in magnetic field, so as to the displacement of detection object.Such mode is vulnerable to extraneous magnetic
The interference and measurement accuracy of field are limited, it is desirable to provide stable magnetic field sources considerably increase the production cost of product.
The content of the invention
The technical problem to be solved by the utility model is to provide a kind of contactless absolute displacement transducers, can be immunized
In the influence of stray magnetic field.
In order to solve the above technical problems, technical solution is used by the utility model：A kind of contactless absolute displacement
Sensor, it is characterised in that：Including pedestal, detection unit is fixed on pedestal, further includes metal block, the metal is slided
Block is closely coupled with testee, acts simultaneously；
The detection unit includes excitation coil and receiving coil, there are two the receiving coil is set, in receiving coil
Periphery is equipped with excitation coil；Excitation coil and receiving coil are connected with microprocessor；The receiving coil also with receiving circuit
Connection, the excitation coil are also connected with exciting circuit.
Preferably, two receiving coils are distributed in sine curve, and between there is 90 degree of phase difference, receiving coil and oneself
Body 180 degree phase difference forms closed curve and is connected into receiving circuit.
Preferably, the excitation coil and receiving coil are printed on using PCB manufacture crafts on pcb board.
Preferably, the receiving coil is distributed in sine curve, and is a complete cycle on pcb board；In pcb board
Four sinusoidal coils are equipped with, phase difference is that 90 degree of connection is a closing coil, and phase difference is the connection of 180 degree
For a closing coil.
Preferably, the microprocessor is also connected with data output device, the data output device include Analog,
PWM, SENT and Uart.
Preferably, the metal block is not contacted with detection unit.
Preferably, the microprocessor uses MSP430G2533.
The utility model provides a kind of contactless absolute displacement transducer, can realize non-contact measurement and be immunized miscellaneous
The influence in magnetic field is dissipated, the requirement based on sensing without magnet reduces cost.In addition, also there is high-precision, wide work temperature
The features such as degree, ultrathin design.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the electrical block diagram of the utility model；
Fig. 3 is the coil layout schematic diagram of the utility model；
In figure：Receiving coil 1, excitation coil 2, microprocessor 3, output device 4, pedestal a, metal block c, detection unit
b。
Specific embodiment
As shown in Figure 1, a kind of contactless absolute displacement transducer, it is characterised in that：It is solid on pedestal a including pedestal a
Surely detection unit b is equipped with, further includes metal block c, the metal block c is closely coupled with testee, acts simultaneously；
As shown in Fig. 2, the detection unit b includes excitation coil 2 and receiving coil 1, the receiving coil 1 is equipped with two
It is a, it is equipped with excitation coil 2 in the periphery of receiving coil 1；Excitation coil 2 and receiving coil 1 are connected with microprocessor 3；It is described
Receiving coil 1 is also connected with receiving circuit, and the excitation coil 2 is also connected with exciting circuit.
Preferably, two receiving coils 1 are distributed in sine curve, and between there is 90 degree of phase difference, receiving coil 1 and
Itself 180 degree phase difference forms closed curve and is connected into receiving circuit.
Preferably, the excitation coil 2 and receiving coil 1 are printed on using PCB manufacture crafts on pcb board.
Preferably, the receiving coil 1 is distributed in sine curve, and is a complete cycle on pcb board；In PCB
Plate is equipped with four sinusoidal coils, and phase difference is that 90 degree of connection is a closing coil, and phase difference is the company of 180 degree
It is connected in a closing coil.
Preferably, the microprocessor 3 is also connected with data output device 4, the data output device include Analog,
PWM, SENT and Uart.
Preferably, the metal block c is not contacted with detection unit b.
Preferably, the microprocessor 3 uses MSP430G2533.
Detection unit has exciting circuit, can generate high frequency pumping electric current, and typical frequencies are 2MHz ~ 6MHz；Exciting circuit
Excitation coil is connected to, exciting current generates electromagnetic field of high frequency by excitation coil, and wherein excitation coil is according to the different tools of design
There are the structures such as different forms, such as rectangle, sector；Detection unit also has receiving coil and receiving circuit, wherein receiving coil
Different shape can be laid by design, typical reception coil has two groups of coils, and one group is loop A, and another group is coil B, line
Circle A and coil B meets certain spatial distribution characteristic, and typical space distribution characteristics has 90 degree of phases for loop A and coil B
Difference.Metal block is object to be measured object, and when metal block is placed near detection coil, the high frequency that detection coil generates is handed over
Galvanic electricity magnetic field can generate current vortex in metal block, and current vortex can externally generate induction field again, and receiving coil is placed on
Near metal block, receiving coil can receive the induction field.Pedestal plays fixation, fixed test unit, wherein gold
Belonging to sliding block can be completely isolated with pedestal.
Metal block can select arbitrary metal, include but not limited to copper, iron, aluminium and other metal materials or metal
Alloy material.The thickness of metal block is most thin to can be designed as 0.04mm, need to simply be pasted for measurement object on its surface
A upper sheet metal can work.
This sensor using metal block as object to be measured, since non-magnetic material can be used in metal block, compared with
Based on hall displacement transducer, reduce by magnet sense based on requirement, reduce cost.Metal block is with pcb board
Non-contact connection, farthest can be at a distance of 15mm between them, and this avoid mechanical frictions, can greatly improve sensor
Service life.
Metal block is as object to be measured, when metal block is placed near detection coil, the height of detection coil generation
Frequency ac magnetic field can generate current vortex in metal block, and current vortex can externally generate induction field again, and receiving coil is put
It puts near metal block, receiving coil can receive the induction field, generate secondary voltage.Two groups of coils due to position not
Together, the secondary voltage of generation also differs.Data processing is demodulated by the voltage to coil, calculate sliding block it is absolute
Position.Data finally are converted into certain form to export
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the technical solution that the scope of protection of the utility model should be recorded with claim, the technical solution recorded including claim
The equivalents of middle technical characteristic are protection domain.Equivalent substitution i.e. within this range is improved, also in the utility model
Protection domain within.
Claims (7)
1. a kind of contactless absolute displacement transducer, it is characterised in that：Including pedestal（a）, in pedestal（a）On be fixed with inspection
Survey unit（b）, further include metal block（c）, the metal block（c）It is closely coupled with testee, it acts simultaneously；
The detection unit（b）Including excitation coil（2）And receiving coil（1）, the receiving coil（1）There are two if, connecing
Take-up circle（1）Periphery be equipped with excitation coil（2）；Excitation coil（2）And receiving coil（1）And microprocessor（3）Connection；Institute
State receiving coil（1）It is also connected with receiving circuit, the excitation coil（2）Also it is connected with exciting circuit.
2. a kind of contactless absolute displacement transducer according to claim 1, it is characterised in that：Two receiving coils（1）
Be distributed in sine curve, and between there is 90 degree of phase difference, receiving coil（1）It is formed with itself 180 degree phase difference and is closed song
Line is connected into receiving circuit.
3. a kind of contactless absolute displacement transducer according to claim 1, it is characterised in that：The excitation coil（2）
And receiving coil（1）Using PCB manufacture crafts, it is printed on pcb board.
4. a kind of contactless absolute displacement transducer according to claim 3, it is characterised in that：The receiving coil（1）
It is distributed in sine curve, and is a complete cycle on pcb board；Four sinusoidal coils, phase are equipped on pcb board
Potential difference is that 90 degree of connection is a closing coil, and phase difference is that the connection of 180 degree is a closing coil.
5. a kind of contactless absolute displacement transducer according to claim 1, it is characterised in that：The microprocessor（3）
Also with data output device（4）Connection, the data output device include Analog, PWM, SENT and Uart.
6. a kind of contactless absolute displacement transducer according to claim 1, it is characterised in that：The metal block（c）
With detection unit（b）It does not contact.
7. a kind of contactless absolute displacement transducer according to claim 1, it is characterised in that：The microprocessor（3）
Using MSP430G2533.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721641210.4U CN207407809U (en) | 2017-11-30 | 2017-11-30 | A kind of contactless absolute displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721641210.4U CN207407809U (en) | 2017-11-30 | 2017-11-30 | A kind of contactless absolute displacement transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207407809U true CN207407809U (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721641210.4U Active CN207407809U (en) | 2017-11-30 | 2017-11-30 | A kind of contactless absolute displacement transducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823082A (en) * | 2019-11-21 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | In-situ determination method for wall thickness of neck part of tail handle |
-
2017
- 2017-11-30 CN CN201721641210.4U patent/CN207407809U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823082A (en) * | 2019-11-21 | 2020-02-21 | 中国航发贵州黎阳航空动力有限公司 | In-situ determination method for wall thickness of neck part of tail handle |
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