CN101986103A - Anti-central interference rotary encoder - Google Patents
Anti-central interference rotary encoder Download PDFInfo
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- CN101986103A CN101986103A CN 201010517108 CN201010517108A CN101986103A CN 101986103 A CN101986103 A CN 101986103A CN 201010517108 CN201010517108 CN 201010517108 CN 201010517108 A CN201010517108 A CN 201010517108A CN 101986103 A CN101986103 A CN 101986103A
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- circuit board
- rotary encoder
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- annular
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Abstract
The invention relates to an anti-central interference rotary encoder which comprises an optical signal receiving circuit board in the shape of a ring on the whole, an internal metal ring is covered on the inner wall of a central through hole of the circuit board, and an external metal ring is covered on the side wall of an outer ring of the circuit board. The rotary encoder further comprises an annular glass plate, an annular chromium film layer is plated in the position which is near to the outer ring of the annular glass plate, and through and dark scribed lines for representing code information are scribed on the annular chromium film layer; and a plurality of rings of chromium film closed loops which are insulated mutually are plated in the position which is near to an inner ring of the annular glass plate, and all the chromium film closed loops are insulated with the annular chromium film layer. The plurality of rings of the chromium film closed loops which are insulated mutually are plated in the position which is near to the inner ring of the annular glass plate of a glass encoding disk, and all the chromium film closed loops are insulated with the annular chromium film layer. Metal shielding covers are arranged on two sides of the circuit board, and the metal shielding covers are also arranged on the inner side of a light source mounting plate.
Description
Technical field
The present invention relates to the field of rotary encoder, specifically is the rotary encoder that a kind of anti-central authorities disturb.
Background technology
Rotary encoder is the device that is used for measuring rotating speed.It is divided into single channel output and two-way is exported two kinds.Technical parameter mainly contains revolution umber of pulse (tens have to several thousand) and supply voltage etc.Single channel output is meant that the output of rotary encoder is a set of pulses, and the pulse that the rotary encoder of two-way output is exported two groups of phase differential, 90 degree not only can be measured rotating speed by this two group pulse, can also judge the direction of rotation.
On the turning axle of rotary encoder, be provided with and be carved with the uniformly-spaced rotating grating plate of scale, echo mutually therewith, on the scrambler framework, adorning the fixed light screen that is carved with the same intervals scale.Be respectively equipped with light-emitting component and photo detector in these two original screen panel both sides.The light that light-emitting component sends along with the turning axle rotation, by the light that each grating hid, just in time sends the light and shade striped with rotating speed pro rata.This light and shade striped sends as electric signal on photo detector, and the wave shaping of the optical signal receiving circuit that process links to each other with photo detector is exported as square-wave signal.The phase place of two signals of general this output, 1/4 raster pitch that staggers mutually, the sense of rotation counter-rotating, this phase place is also opposite, with the up-down counter combination that has the circuit of can taking one's bearings, can carry out plus-minus method to rotation amount and calculate.
Above-mentioned the deficiencies in the prior art part is: code-wheel is located on the motor shaft, easily makes the coat of metal static electrification that is carved with coding on the code-wheel.When code-wheel rotates with motor shaft, static and electromagnetic interference (EMI) can take place, thereby influence the up and down operate as normal that is placed in the annular circuit board on the motor shaft of both sides of code-wheel, and the influence coding reads the operate as normal of chip, even burn chip.
Summary of the invention
The technical problem to be solved in the present invention provides the rotary encoder that a kind of anti-central authorities simple in structure, antistatic and that electromagnetic interference performance is higher disturb.
For solving the problems of the technologies described above, the rotary encoder that anti-central authorities provided by the invention disturb, comprise: whole ringwise and be provided with the circuit board of optical signal receiving circuit, be characterized in: be covered with interior becket on the center through hole inwall of this circuit board, be covered with outer becket on the outer ring sidewall of this circuit board.
Further, described interior becket links to each other with outer becket or links to each other with the zero-potential point of circuit board simultaneously, to prevent because of the electric field that voltage difference was produced that inside and outside becket the exists circuit board operate as normal being brought adverse effect.
Further, described in becket be coated on the edge of center through hole of circuit board, behind the code-wheel static electrification that prevents to be located at circuit board one side circuit board is produced magnetic interference, promptly Ci Shi interior becket is suitable for shielding radial and axial magnetic interference.
Further, described outer becket is coated on the edge, outer ring of circuit board, can further prevent from behind the described code-wheel static electrification circuit board to be produced magnetic interference.
Further, this rotary encoder comprises rotating grating plate (that is: glass code-wheel); This rotating grating plate is the ring glass dish, and place, adjacent rings glass disc outer ring is coated with annular chromium rete, is carved with logical, the dark groove that is used to characterize coded message on the annular chromium rete; Adjacent rings glass disc inner ring place is coated with multi-turn chromium membrane closure ring insulated from each other, each chromium membrane closure ring and the insulation of annular chromium rete.The adjacent rings glass disc inner ring place of glass code-wheel is coated with multi-turn chromium membrane closure ring insulated from each other, each chromium membrane closure ring and the insulation of annular chromium rete, thereby the static that motor shaft conduction is come be limited in the nearer one or more chromium membrane closure rings of glass disc inner ring on, thereby avoid making the annular chromium rete of outer ring charged.Prevented because of charged electricity and the electromagnetic interference (EMI) of producing of the annular chromium rete of outer ring.
Further, static and electromagnetic interference (EMI) take place further to prevent the static on each chromium membrane closure ring in each chromium membrane closure ring and ring glass dish concentric when the glass code-wheel rotates with motor shaft.
Further, the both sides of circuit board are provided with metallic shield, in case circuit board generation static and electromagnetic interference (EMI).
Further, this rotary encoder comprises the light source installing plate that is used to be provided with light-emitting component of being located at the rotating grating front edge of board, and the inboard of this light source installing plate is provided with metallic shield, in case installing plate brings static and electromagnetic interference (EMI) to circuit board.
The technique effect that the present invention has: in the rotary encoder that (1) anti-central authorities of the present invention disturb, be covered with interior becket on the center through hole inwall of the circuit board at optical signal receiving circuit place, be covered with outer becket on the outer ring of this circuit board.Inside and outside becket constitutes the short circuit closed loop, be suitable for shielding external disturbance and motor shaft conducts magnetic interference, and static is restricted on the inside and outside becket, can avoids making the entire circuit plate to produce unusual potential difference (PD), finally guaranteeing encodes reads the operate as normal of chip and safe in utilization.(2) the rotating grating plate of the Cai Yonging static that is suitable for making the motor shaft conduction be limited in the nearer one or more chromium membrane closure rings of glass disc inner ring on, thereby avoid making the annular chromium rete of outer ring charged, prevented because of charged electricity and the electromagnetic interference (EMI) of producing of the annular chromium rete of outer ring.(3) all be provided with metallic shield on circuit board and the light source installing plate, further avoided generation static and electromagnetic interference (EMI).(4) among the present invention,, make rotary encoder of the present invention have stronger antistatic and electromagnetic interference performance because described circuit board, rotating grating plate have adopted the measure of corresponding antistatic and electromagnetic interference (EMI).
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the circuit board that is provided with optical signal receiving circuit among the embodiment.
Fig. 2 is the structural representation of the rotating grating plate among the embodiment.
Fig. 3 is the structural representation of the rotary encoder of the anti-central authorities interference among the embodiment.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
As Fig. 1-3, the rotary encoder that the anti-central authorities of present embodiment disturb comprises: be located at the turning axle 2 of metal frame 4 central authorities by bearing 3, from inside to outside be sheathed on circuit board 1, fixed light screen 5 and the rotating grating plate 10 of turning axle 2 front ends successively; Rotating grating plate 10 front ends are provided with the light source installing plate 7 that is used to be provided with light-emitting component 6, and the inboard of this light source installing plate 7 (promptly relative with rotating grating plate 10 side) is provided with metallic shield.
Described circuit board 1 be whole ringwise and be provided with the circuit board of optical signal receiving circuit; Becket 1-1 in being covered with on the center through hole inwall of this circuit board 1 is covered with outer becket 1-2 on the outer ring sidewall of this circuit board 1.Interior becket 1-1 and outer becket 1-2 constitute the short circuit closed loop, are suitable for the static and the magnetic interference of the conduction of shield electric machine axle, and can avoid making entire circuit plate 1 static electrification or potential difference (PD), and finally guaranteeing encodes reads the operate as normal of chip and safe in utilization.
Becket 1-1 links to each other with outer becket 1-2 or links to each other with the zero-potential point of circuit board 1 simultaneously in described, to prevent because of the electric field that voltage difference was produced that inside and outside becket the exists operate as normal of circuit board 1 being brought adverse effect.
Becket 1-1 is coated on the edge of center through hole of circuit board 1 in described, and described outer becket 1-2 is coated on the edge, outer ring of circuit board 1, with behind the code-wheel static electrification that prevents to be located at circuit board 1 one sides to circuit board generation magnetic interference.
The both sides of circuit board 1 are provided with metallic shield, in case circuit board generation static and electromagnetic interference (EMI), in case installing plate brings static and electromagnetic interference (EMI) to circuit board.
Described rotating grating plate 10 is the ring glass dish, and place, adjacent rings glass disc outer ring is coated with annular chromium rete 11, is carved with logical, the dark groove 12 that is used to characterize coded message on the annular chromium rete 11; The figure place is coated with multi-turn chromium membrane closure ring 13 insulated from each other in the adjacent rings glass disc, each chromium membrane closure ring 13 and annular chromium rete 11 insulation.
Static and electromagnetic interference (EMI) take place further to prevent the static on each chromium membrane closure ring in each chromium membrane closure ring 13 and ring glass dish concentric when the glass code-wheel rotates with motor shaft.
Obviously, the foregoing description only is for example of the present invention clearly is described, and is not to be qualification to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (8)
1. rotary encoder that anti-central authorities disturb, comprise whole ringwise and be provided with the circuit board (1) of optical signal receiving circuit; It is characterized in that: be covered with interior becket (1-1) on the center through hole inwall of this circuit board (1), be covered with outer becket (1-2) on the outer ring sidewall of this circuit board (1).
2. the rotary encoder that anti-central authorities according to claim 1 disturb is characterized in that: becket (1-1) links to each other with outer becket (1-2) or links to each other with the zero-potential point of circuit board (1) simultaneously in described.
3. the rotary encoder that anti-central authorities according to claim 1 disturb is characterized in that: becket (1-1) is coated on the edge of center through hole of circuit board (1) in described.
4. the rotary encoder that anti-central authorities according to claim 1 disturb, it is characterized in that: described outer becket (1-2) is coated on the edge, outer ring of circuit board (1).
5. the rotary encoder that anti-central authorities according to claim 1 disturb, it is characterized in that: this rotary encoder also comprises rotating grating plate (10); This rotating grating plate (10) is the ring glass dish, and place, adjacent rings glass disc outer ring is coated with annular chromium rete (11), is carved with logical, the dark groove (12) that is used to characterize coded message on the annular chromium rete (11); Adjacent rings glass disc inner ring place is coated with multi-turn chromium membrane closure ring (13) insulated from each other, each chromium membrane closure ring (13) and annular chromium rete (11) insulation.
6. the rotary encoder that anti-central authorities according to claim 5 disturb is characterized in that: each chromium membrane closure ring (13) and ring glass dish concentric.
7. according to the rotary encoder of the described anti-central authorities of one of claim 1-6 interference, it is characterized in that: the both sides of circuit board (1) are provided with metallic shield.
8. the rotary encoder that anti-central authorities according to claim 7 disturb, it is characterized in that: this rotary encoder comprises the light source installing plate (7) that is used to be provided with light-emitting component (6) of being located at rotating grating plate (10) front end, and the inboard of this light source installing plate (7) is provided with metallic shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010517108 CN101986103A (en) | 2010-10-19 | 2010-10-19 | Anti-central interference rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010517108 CN101986103A (en) | 2010-10-19 | 2010-10-19 | Anti-central interference rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101986103A true CN101986103A (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010517108 Pending CN101986103A (en) | 2010-10-19 | 2010-10-19 | Anti-central interference rotary encoder |
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| Country | Link |
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| CN (1) | CN101986103A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403231A (en) * | 2015-11-04 | 2016-03-16 | 东方通信股份有限公司 | Magnetic rotary encoder |
| WO2018095213A1 (en) * | 2016-11-23 | 2018-05-31 | 福州大学 | Apparatus and method for measuring rotational speed of rotary shaft based on variable density sinusoidal fringe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4992688A (en) * | 1987-09-16 | 1991-02-12 | Papst-Motoren Gmbh & Co. Kg | Printed circuit board with a metallic layer for supporting an electrical component |
| CN2613787Y (en) * | 2003-01-24 | 2004-04-28 | 长春第一光学有限公司 | Quick positioning installed glass optical grating disk |
| CN2771826Y (en) * | 2005-03-18 | 2006-04-12 | 无锡市海德科技有限公司 | Template positioning rotor magnetic-pole position signal coder |
| RU2366125C1 (en) * | 2008-03-11 | 2009-08-27 | ОАО "Научно-производственный комплекс "ЭЛАРА" имени Г.А. Ильенко" (ОАО "ЭЛАРА") | Radio-electronic unit and method of making said radio-electronic unit |
| CN201303461Y (en) * | 2008-11-25 | 2009-09-02 | 英业达股份有限公司 | Layout structure for preventing electrostatic discharge and electromagnetic interference |
| CN201888018U (en) * | 2010-10-19 | 2011-06-29 | 叶建丰 | Circuit board with shielding function and short circuit closed loop for rotary encoder |
-
2010
- 2010-10-19 CN CN 201010517108 patent/CN101986103A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4992688A (en) * | 1987-09-16 | 1991-02-12 | Papst-Motoren Gmbh & Co. Kg | Printed circuit board with a metallic layer for supporting an electrical component |
| CN2613787Y (en) * | 2003-01-24 | 2004-04-28 | 长春第一光学有限公司 | Quick positioning installed glass optical grating disk |
| CN2771826Y (en) * | 2005-03-18 | 2006-04-12 | 无锡市海德科技有限公司 | Template positioning rotor magnetic-pole position signal coder |
| RU2366125C1 (en) * | 2008-03-11 | 2009-08-27 | ОАО "Научно-производственный комплекс "ЭЛАРА" имени Г.А. Ильенко" (ОАО "ЭЛАРА") | Radio-electronic unit and method of making said radio-electronic unit |
| CN201303461Y (en) * | 2008-11-25 | 2009-09-02 | 英业达股份有限公司 | Layout structure for preventing electrostatic discharge and electromagnetic interference |
| CN201888018U (en) * | 2010-10-19 | 2011-06-29 | 叶建丰 | Circuit board with shielding function and short circuit closed loop for rotary encoder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403231A (en) * | 2015-11-04 | 2016-03-16 | 东方通信股份有限公司 | Magnetic rotary encoder |
| CN105403231B (en) * | 2015-11-04 | 2017-12-05 | 东方通信股份有限公司 | Magnetic rotary encoder |
| WO2018095213A1 (en) * | 2016-11-23 | 2018-05-31 | 福州大学 | Apparatus and method for measuring rotational speed of rotary shaft based on variable density sinusoidal fringe |
| US11579162B2 (en) | 2016-11-23 | 2023-02-14 | Fu Zhou University | Apparatus and method for measuring rotational speed of rotary shaft based on variable density sinusoidal fringe |
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Application publication date: 20110316 |