CN104776789A - Non-contact type two-freedom-degree position sensor - Google Patents
Non-contact type two-freedom-degree position sensor Download PDFInfo
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- CN104776789A CN104776789A CN201510137109.4A CN201510137109A CN104776789A CN 104776789 A CN104776789 A CN 104776789A CN 201510137109 A CN201510137109 A CN 201510137109A CN 104776789 A CN104776789 A CN 104776789A
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- contactless
- freedom
- moving parts
- position transducer
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Abstract
The invention discloses a non-contact type two-freedom-degree position sensor which comprises a shell, a motion component and a sensing unit, wherein the motion component and the sensing unit are mounted inside the shell; the motion component is a two-freedom-degree motion component with lifting movement and rotation movement; the sensing unit is arranged below the motion component and is used for sensing the position signal of the lifting movement and the angle signal of the rotation movement of the motion component. Due to the adoption of the non-contact type two-freedom-degree position sensor, non-contact type two-freedom-degree position detection on the longitudinal displacement and the circumferential rotation angle is achieved, the detection precision is greatly improved, and the environment adaptability and the anti-interference property are improved.
Description
Technical field
The present invention relates to field of position sensors, particularly relate to a kind of contactless two-freedom position transducer.
Background technology
Flourish along with industrial information, sensor, as key foundation parts, receives and pays close attention to more and more widely.Along with the continuous propelling of electromechanical servo control technology, there are requirements at the higher level to the indices of sensory feedback signal wherein, the position transducer that, adaptive capacity to environment high in the urgent need to measuring accuracy is strong.
Scrambler of the prior art, grating, piezoelectric transducer, capacitance type sensor etc. all have position detection capability, but due to the restriction of signal condition technology, often have the following disadvantages:
1, the detection of single degree of freedom can only be carried out;
2, object selectivity is poor, needs the frock that design is unique, can only pass through contact type measurement;
3, the jamproof ability of antinoise is more weak and precision is not high;
4, cost is higher and environmental suitability is poor, normally cannot use under the mal-condition such as greasy dirt, sand and dust;
Above-mentioned deficiency constrains the range of application of the position transducer of prior art greatly.
Summary of the invention
The technical problem to be solved in the present invention is: for prior art Problems existing, the contactless two-freedom position transducer that the two-freedom position that provide that a kind of accuracy of detection is high, good environmental adaptability, antijamming capability are strong, can realize contactless length travel amount and the angle that rotates in a circumferential direction is detected.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of contactless two-freedom position transducer, the moving parts comprising housing and be installed in housing and sensing cell, described moving parts is the two-freedom moving component with elevating movement and rotary motion, and the below that described sensing cell is arranged in moving parts is used for sensing the described position signalling of moving parts elevating movement and the angle signal of rotary motion.
As a further improvement on the present invention, described moving parts comprises motion body and more than one sensor conductor, and described sensor conductor is arranged in motion body towards on one end of sensing cell.
As a further improvement on the present invention, described sensor conductor is one and is directly embedded in the below of motion body.
As a further improvement on the present invention, described sensing cell comprises sensory panel and is positioned at three magnetizing coils on sensory panel, and one of them magnetizing coil is measured with the position signalling being used for being undertaken by the Distance Judgment between sensor conductor and magnetizing coil elevating movement in the middle part of sensory panel; All the other two magnetizing coils symmetrically shape are arranged in the both sides on sensory panel, are used for carrying out when sensor conductor rotates the angle displacement measurement of differential type.
As a further improvement on the present invention, described sensory panel is pcb board, and a described magnetizing coil point multilayer is arranged on pcb board.
As a further improvement on the present invention, described housing is provided with motion cavity, described moving parts is positioned at motion cavity, and the upper and lower side of described motion cavity is respectively equipped with lifting limiting section.
As a further improvement on the present invention, the top of described moving parts is provided with motor adjustment parts.
As a further improvement on the present invention, sealing process has also been done to improve the water resistance of device in the bottom in housing.
Compared with prior art, the invention has the advantages that:
Contactless two-freedom position transducer of the present invention, by arranging moving parts and the sensing cell of rotatable/vertical movement in housing, thus achieve contactless length travel amount and the detection of the two-freedom position of the angle that rotates in a circumferential direction, substantially increase accuracy of detection, enhance environmental suitability and antijamming capability.
Accompanying drawing explanation
Fig. 1 is contactless two-freedom position transducer of the present invention structural principle schematic diagram in an embodiment.
Fig. 2 is contactless two-freedom position transducer of the present invention sensor conductor in an embodiment and the principle schematic of sensory panel cooperation.
Marginal data:
1, housing; 2, moving parts; 21, motion body; 22, sensor conductor; 23, motor adjustment parts; 3, sensing cell; 31, sensory panel; 4, motion cavity; 41, limiting section is elevated.
Embodiment
Below in conjunction with specific embodiments and the drawings, the present invention is described in further detail.
As depicted in figs. 1 and 2, the invention provides a kind of contactless two-freedom position transducer, the moving parts 2 comprising housing 1 and be installed in housing 1 and sensing cell 3, described moving parts 2 is for having the two-freedom moving component of elevating movement and rotary motion, and the below that described sensing cell 3 is arranged in moving parts 2 is used for sensing the position signalling of described moving parts 2 elevating movement and the angle signal of rotary motion.
In the present embodiment, described moving parts 2 comprises motion body 21 and more than one sensor conductor 22, and described sensor conductor 22 is arranged in motion body 21 towards on one end of sensing cell 3.
In the present embodiment, described sensor conductor 22 is one and is directly embedded in the below of motion body 21.This Embedded design not only reduces installing space to greatest extent, and the aligning of zero-bit of being more convenient for.
In the present embodiment, described sensing cell 3 comprises sensory panel 31 and is positioned at three magnetizing coils on sensory panel 31, and one of them magnetizing coil is measured with the position signalling being used for being undertaken by the Distance Judgment between sensor conductor 22 and magnetizing coil elevating movement in the middle part of sensory panel 31; All the other two magnetizing coils symmetrically shape are arranged in the both sides on sensory panel 31, are used for carrying out when sensor conductor 22 rotates the angle displacement measurement of differential type.In the present embodiment, two magnetizing coils being positioned at both sides on sensory panel 31 are special-shaped coils, when sensor conductor 22 rotates, two special-shaped coils work simultaneously, change in the opposite direction with the coupling area of sensor conductor 22, thus the angle displacement realizing differential type is measured, and effectively improves measuring accuracy.
In the present embodiment, moving parts 2 is based on rotary axis system design concept, and housing 1 provides supporting for moving parts 2 and sensory panel 31, also rotates and the space of vertical movement for moving parts 2 provides simultaneously; Utilize inductance and the impedance variation of electromagnetic induction and eddy current effect principle induction magnetizing coil, realize measuring the contactless position of the accurate vertical displacement of low stroke and the angle displacement two-freedom of finite angle.
During work, moving parts 2 carries out rotating or vertically movement, coupling area between sensor conductor 22 and sensory panel 31 or spacing are changed, thus change overall magnetic field, cause the change of inductance parameter, after these signals changed are gathered by control circuit, complete acquisition process in embedded systems, finally detect the location variation of sensor conductor 22.
In the present embodiment, described sensory panel 31 is pcb board, and a described magnetizing coil point multilayer is arranged on pcb board.Be different from traditional eddy current sensor, magnetizing coil of the present invention to adopt PCB technology cloth four layers on 1mm circuit board, and whole device is succinctly small and exquisite.
In the present embodiment, described housing 1 is provided with motion cavity 4, described moving parts 2 is positioned at motion cavity 4, and the upper and lower side of described motion cavity 4 is respectively equipped with lifting limiting section 41.In the present embodiment, lifting limiting section 41 be in motion cavity 4 below positive stop lug boss and the spacing end cap of top, spacing end cap not only provides supporting for moving parts 2, but also vertically moves it and play spacing effect.
In the present embodiment, the top of described moving parts 2 is provided with motor adjustment parts 23.Motor adjustment parts 23 are the bolt be connected with moving parts 2 in the present embodiment.
In the present embodiment, sealing process has also been done to improve the water resistance of device in the bottom in housing 1.
In the present embodiment, be connected with control circuit because sensing cell 3 needs to weld 6 wires, in order to accommodating wire is considered, bottom in described housing 1 also arranges the circuit hole of hermetically-sealed construction, and sensing cell 3 is electrically connected with described control circuit by the wire (not shown) through described circuit hole.
In the present embodiment, described sensor conductor 22 adopts the model of TI company to be the inductance digital conversion chip of LDC1000, and its effect is the realization and the collection that realize becoming parameter coil signal.This chip can realize the test frequency of 5KHz to 5MHz, has very high measuring accuracy.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (8)
1. a contactless two-freedom position transducer, it is characterized in that, the moving parts (2) comprising housing (1) and be installed in housing (1) and sensing cell (3), described moving parts (2) is for having the two-freedom moving component of elevating movement and rotary motion, and the below that described sensing cell (3) is arranged in moving parts (2) is used for sensing the position signalling of described moving parts (2) elevating movement and the angle signal of rotary motion.
2. contactless two-freedom position transducer as claimed in claim 1, it is characterized in that, described moving parts (2) comprises motion body (21) and more than one sensor conductor (22), and described sensor conductor (22) is arranged in motion body (21) towards on one end of sensing cell (3).
3. contactless two-freedom position transducer as claimed in claim 2, is characterized in that, described sensor conductor (22) is one and is directly embedded in the below of motion body (21).
4. contactless two-freedom position transducer as claimed in claim 2, it is characterized in that, described sensing cell (3) comprises sensory panel (31) and is positioned at three magnetizing coils on sensory panel (31), and one of them magnetizing coil is positioned at sensory panel (31) middle part and measures with the position signalling being used for being undertaken by the Distance Judgment between sensor conductor (22) and magnetizing coil elevating movement; All the other two magnetizing coils symmetrically shape are arranged in the both sides on sensory panel (31), are used for carrying out when sensor conductor (22) rotates the angle displacement measurement of differential type.
5. contactless two-freedom position transducer as claimed in claim 4, is characterized in that, described sensory panel (31) is pcb board, and a described magnetizing coil point multilayer is arranged on pcb board.
6. the contactless two-freedom position transducer as described in claims 1 to 3 any one, it is characterized in that, described housing (1) is provided with motion cavity (4), described moving parts (2) is positioned at motion cavity (4), and the upper and lower side of described motion cavity (4) is respectively equipped with lifting limiting section (41).
7. the contactless two-freedom position transducer as described in claims 1 to 3 any one, is characterized in that, the top of described moving parts (2) is provided with motor adjustment parts (23).
8. the contactless two-freedom position transducer as described in claims 1 to 3 any one, is characterized in that, sealing process has also been done to improve the water resistance of device in the bottom in housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510137109.4A CN104776789A (en) | 2015-03-26 | 2015-03-26 | Non-contact type two-freedom-degree position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510137109.4A CN104776789A (en) | 2015-03-26 | 2015-03-26 | Non-contact type two-freedom-degree position sensor |
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| Publication Number | Publication Date |
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| CN104776789A true CN104776789A (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510137109.4A Pending CN104776789A (en) | 2015-03-26 | 2015-03-26 | Non-contact type two-freedom-degree position sensor |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5789917A (en) * | 1990-12-05 | 1998-08-04 | Moving Magnet Technologie Sa | Magnetic position sensor with hall probe formed in an air gap of a stator |
| US6175233B1 (en) * | 1996-10-18 | 2001-01-16 | Cts Corporation | Two axis position sensor using sloped magnets to generate a variable magnetic field and hall effect sensors to detect the variable magnetic field |
| CN1340149A (en) * | 1999-12-14 | 2002-03-13 | 松下电器产业株式会社 | Noncontact position sensor |
| CN1462363A (en) * | 2001-05-11 | 2003-12-17 | 索尼公司 | Servo actuator and position sensor thereof |
| CN1708671A (en) * | 2002-11-22 | 2005-12-14 | 梅科斯特拉克斯勒股份公司 | Device for contact-less measurement of distances in multiple directions |
| CN101025358A (en) * | 2006-02-18 | 2007-08-29 | 费斯托合资公司 | Device for determining the axial and/or angular position of a body |
| CN102607501A (en) * | 2010-12-24 | 2012-07-25 | 帕拉贡股份公司 | Sensor arrangement for detecting axial and rotary position of longitudinally displaceable and rotatable shaft such as switching shaft of hand shift transmission, has linear sensor with two sensor elements |
| CN103443590A (en) * | 2011-03-31 | 2013-12-11 | 东方马达株式会社 | Absolute encoder device and motor |
-
2015
- 2015-03-26 CN CN201510137109.4A patent/CN104776789A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5789917A (en) * | 1990-12-05 | 1998-08-04 | Moving Magnet Technologie Sa | Magnetic position sensor with hall probe formed in an air gap of a stator |
| US6175233B1 (en) * | 1996-10-18 | 2001-01-16 | Cts Corporation | Two axis position sensor using sloped magnets to generate a variable magnetic field and hall effect sensors to detect the variable magnetic field |
| CN1340149A (en) * | 1999-12-14 | 2002-03-13 | 松下电器产业株式会社 | Noncontact position sensor |
| CN1462363A (en) * | 2001-05-11 | 2003-12-17 | 索尼公司 | Servo actuator and position sensor thereof |
| CN1708671A (en) * | 2002-11-22 | 2005-12-14 | 梅科斯特拉克斯勒股份公司 | Device for contact-less measurement of distances in multiple directions |
| CN101025358A (en) * | 2006-02-18 | 2007-08-29 | 费斯托合资公司 | Device for determining the axial and/or angular position of a body |
| CN102607501A (en) * | 2010-12-24 | 2012-07-25 | 帕拉贡股份公司 | Sensor arrangement for detecting axial and rotary position of longitudinally displaceable and rotatable shaft such as switching shaft of hand shift transmission, has linear sensor with two sensor elements |
| CN103443590A (en) * | 2011-03-31 | 2013-12-11 | 东方马达株式会社 | Absolute encoder device and motor |
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Application publication date: 20150715 |
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