CN105387877B - Banknote sensing system magnetic rotary encoder - Google Patents
Banknote sensing system magnetic rotary encoder Download PDFInfo
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- CN105387877B CN105387877B CN201510741467.6A CN201510741467A CN105387877B CN 105387877 B CN105387877 B CN 105387877B CN 201510741467 A CN201510741467 A CN 201510741467A CN 105387877 B CN105387877 B CN 105387877B
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- protective plate
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- permanent magnet
- circuit board
- rotating shaft
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Abstract
The invention discloses a kind of banknote sensing system magnetic rotary encoder, include the housing of end opening up and down, the rotating shaft being made up outside housing lower end and of non-magnet_conductible material is stretched out in one end, the bearing for being sheathed in rotating shaft and being contacted with inner walls, capel in the middle part of rotating shaft upper surface, permanent magnet in capel, being used in rotating shaft eliminates the lower magnetic protective plate of the external magnetic signal below permanent magnet, circuit board in the inner walls above permanent magnet, Magnetic Sensor on circuit board lower surface, upper magnetic protective plate in the inner walls on circuit board top, cover plate located at housing upper end, the wire electrically connected with Magnetic Sensor is stretched out outside housing.The present invention, which has, to eliminate the energy of most of external magnetic signal, the characteristics of anti-interference is good, signal stabilization is good, output signal accuracy is high.
Description
Technical field
The present invention relates to magnetic sensor non-targeted magnetic signal interference prevention technical field, more particularly to one kind can be by outside
Most of energy of magnetic signal is eliminated, and the banknote sensing system that anti-interference is good, signal stabilization is good, output signal accuracy is high is used
Magnetic rotary encoder.
Background technology
Rotary encoder is changed by photoelectricity or magnetoelectricity, can be converted into the mechanical quantities such as the angular displacement of output shaft, angular speed
Corresponding electric pulse and with digital output, is widely used in speed control, position control.
Common banknote sensing system uses integrated magnetoelectricity conversion chip, magnetoelectricity conversion chip with magnetic rotary encoder
High-precision AD module is internally integrated, when the umber of pulse that rotary encoder is often transferred out is higher, is vulnerable to magnetic letter outside encoder
Number interference；
The disturbance means such as motor, spark plug, transformer can produce the electromagnetic signal interference of mutation, can cause rotary encoder
Magnetic Sensor produce mistake triggering output, and cause dependent on Magnetic Sensor export electronics and electrical equipment can not be normal
Work.
Chinese patent mandate publication number：CN101201257, authorizes publication date on June 18th, 2008, discloses a kind of bank note
Detecting system magnetic rotary encoder, it includes body, is supported by body in axle, the inner termination of axle and magnet is housed,
The electronic circuit board matched with magnet is fixed with body, the mounting structure between described electronic circuit board and body is：
Inner side is machined with electronic circuit board boss on body, and described electronic circuit board is seated on the electronic circuit board boss, with
Body cap is threaded between body, the interior edge of body cap acts against on the electronic circuit board, set on the side of body
There is cable gland.The weak point of the invention is, it is impossible to eliminate the interference of external magnetic signal.
The content of the invention
The present invention goal of the invention be in order to overcome Magnetic Sensor of the prior art easily by external change magnetic signal do
The deficiency disturbed can eliminate most of energy of external magnetic signal there is provided a kind of, and anti-interference is good, signal stabilization is good, defeated
Go out the high banknote sensing system magnetic rotary encoder of signal accuracy.
To achieve these goals, the present invention uses following technical scheme：
A kind of banknote sensing system magnetic rotary encoder, including the housing of end opening up and down, one end is stretched out under housing
The rotating shaft being made outside end and by non-magnet_conductible material, the bearing for being sheathed in rotating shaft and being contacted with inner walls, in rotating shaft
Capel in the middle part of end face, the permanent magnet in capel, being used in rotating shaft eliminates the external magnetic signal below permanent magnet
Lower magnetic protective plate, the circuit board in the inner walls above permanent magnet, the Magnetic Sensor on circuit board lower surface,
Upper magnetic protective plate in the inner walls on circuit board top, the cover plate located at housing upper end is electrically connected with Magnetic Sensor
Wire is stretched out outside housing；Gap is provided between upper magnetic protective plate and circuit board, gap is provided between lower magnetic protective plate and rotating shaft,
Rotating shaft is provided with gap with inner walls, and the permanent magnet is rounded, and permanent magnet and Magnetic Sensor are respectively positioned on the axial line of rotating shaft,
Lower magnetic protective plate and upper magnetic protective plate are made of Ferrite Material.
Rotating shaft drives permanent magnet rotation under the drive of external equipment；Magnetic Sensor is used for the rotary magnetic for detecting permanent magnet
The change of field, and the magnetic signal of change is converted into corresponding electric signal, electric signal is exported by wire；
Lower magnetic protective plate is used to eliminate the external magnetic signal for coming from permanent magnet bottom, and upper magnetic protective plate comes from for elimination
External magnetic signal in circuit board top, making most of energy of external magnetic signal can not be sensed by Magnetic Sensor；Magnetic is passed
The signal of sensor output is only relevant with the rotating excitation field of permanent magnet, improves the anti-interference and signal stabilization of the present invention, defeated
Go out signal accuracy high.
The magnetoelectric effect encoder of the present invention is more simple compared to the internal mechanism of photoelectric effect encoder, it is not necessary to high
The grating of precision etching, withstanding mechanical impact capacity is stronger.
Therefore, the present invention, which has, to eliminate the energy of most of external magnetic signal, and anti-interference is good, signal stabilization
Good, output signal accuracy is high, simple in construction, the characteristics of withstanding mechanical impact capacity is strong.
Preferably, the thickness of lower magnetic protective plate and upper magnetic protective plate is 1.8 times to 2.5 times of permanent magnetism body thickness；
The height of the lower magnetic protective plate upper surface be higher than permanent magnet lower surface height, lower magnetic protective plate upper surface with forever
The distance of magnet lower surface is the 1/2 to 5/8 of permanent magnetism body thickness.
Preferably, the lower magnetic protective plate includes being located at the shaft hole in the middle part of lower magnetic protective plate, shaft hole is a diameter of forever
1.5 times to 1.7 times of magnet diameter.
Preferably, the cross section of the housing, lower magnetic protective plate, circuit board, upper magnetic protective plate and cover plate are rounded；
The Magnetic Sensor is located at the upper groove tapered into circuit board center, the housing provided with diameter, bracket groove
With lower groove；The bearing is located in lower groove, and bearing is interference fitted with lower cell wall, during lower the magnetic protective plate and circuit board are respectively positioned on
In groove, lower magnetic protective plate and middle cell wall interference fits, the upper magnetic protective plate is located in upper groove, between upper magnetic protective plate and upper cell wall
Gap coordinates.
Preferably, the upper surface of the circuit board is covered with copper sheet.
Preferably, the outer peripheral face top of the rotating shaft is provided with annular boss, annular boss is slotted provided with several,
Annular boss is provided with gap with lower cell wall.
Preferably, the diameter of the permanent magnet is 5: 2 to 7: 3 with thickness ratio.
Preferably, the permanent magnet upper surface is concordant with capel upper surface.
Preferably, the spacing between the Magnetic Sensor and permanent magnet is the 1/2 to 5/8 of permanent magnetism body thickness.
Preferably, the gap between upper magnetic protective plate and circuit board is 0.8mm to 1.2mm.
Therefore, the present invention has the advantages that：The energy of most of external magnetic signal can be eliminated, anti-interference
Good, signal stabilization is good, output signal accuracy is high, and simple in construction, withstanding mechanical impact capacity is strong.
Brief description of the drawings
Fig. 1 is a kind of sectional view of the present invention；
Fig. 2 is a kind of configuration schematic diagram of the present invention；
Fig. 3 is another configuration schematic diagram of the present invention；
Fig. 4 is the third configuration schematic diagram of the present invention.
In figure：Housing 1, rotating shaft 2, bearing 3, capel 4, permanent magnet 5, lower magnetic protective plate 6, circuit board 7, Magnetic Sensor 8, on
Magnetic protective plate 9, cover plate 10, wire 11, shaft hole 12, upper groove 13, bracket groove 14, lower groove 15, annular boss 16, fluting 17, interior spiral shell
Nail 18, protective ring 19, male screw thread 20, housing axis hole 21, housing screw hole 22, housing boss 23, circuit board fixing hole 25, upper magnetic
Protective plate threading hole 26, upper magnetic protective plate fixing hole 27, cover plate fixing hole 28, cover plate threading hole 29, conductor jointer 30.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1, Figure 2, Figure 3, Figure 4 is a kind of banknote sensing system magnetic rotary encoder, including
The rotating shaft 2 being made up outside housing lower end and of non-magnet_conductible material is stretched out in the housing 1 of end opening up and down, one end, is sheathed in rotating shaft
And the bearing 3 contacted with inner walls, the capel 4 as shown in Figure 4 in the middle part of rotating shaft upper surface, the permanent magnetism in capel
Body 5, being used in rotating shaft eliminates the lower magnetic protective plate 6 of the external magnetic signal below permanent magnet, as shown in Fig. 2 located at forever
Circuit board 7 in inner walls above magnet, the Magnetic Sensor 8 on circuit board lower surface, located at circuit board top
Upper magnetic protective plate 9 in inner walls, the cover plate 10 located at housing upper end, as shown in figure 1, the wire electrically connected with Magnetic Sensor
11 stretch out outside housing；Gap is provided between upper magnetic protective plate and circuit board, gap is provided between lower magnetic protective plate and rotating shaft.
As shown in Fig. 2 permanent magnet is rounded, permanent magnet and Magnetic Sensor are respectively positioned on the axial line of rotating shaft, lower magnetic protection
Plate and upper magnetic protective plate are made of Ferrite Material.
The thickness of lower magnetic protective plate and upper magnetic protective plate is 1.8 times of permanent magnetism body thickness；Lower magnetic protective plate upper surface
Highly higher than the height of permanent magnet lower surface, the distance of lower magnetic protective plate upper surface and permanent magnet lower surface is permanent magnetism body thickness
1/2。
As shown in figure 3, lower magnetic protective plate includes being located at the shaft hole 12 in the middle part of lower magnetic protective plate, a diameter of permanent magnetism of shaft hole
1.5 times of body diameter.
The cross section of housing, lower magnetic protective plate, circuit board, upper magnetic protective plate and cover plate are rounded；Magnetic Sensor is located at
Circuit board center, as shown in figure 1, the upper groove 13, bracket groove 14 and the lower groove 15 that are tapered into housing provided with diameter；Bearing and
Rotating shaft top is located in lower groove, and lower magnetic protective plate and circuit board are respectively positioned in bracket groove, and upper magnetic protective plate and cover plate are located in upper groove.
The upper surface of circuit board is covered with copper sheet.As shown in Fig. 2 the outer peripheral face top of rotating shaft is provided with annular boss 16, ring
Shape boss is provided with 3 flutings 17, and the fixation provided during for dismantling rotating shaft 2 with bearing 3 to bearing of slotting, fluting can also be filled
Lubricant has kept bearing and the low-frictional force of rotating shaft to rotate.
The diameter of permanent magnet is 5: 2 with thickness ratio.Permanent magnet upper surface is concordant with capel upper surface.Magnetic Sensor and permanent magnetism
Spacing between body is the 1/2 of permanent magnetism body thickness.Gap between upper magnetic protective plate and circuit board is 1mm.
As shown in Fig. 2 also including inner bolt 18, protective ring 19, male screw thread 20, as shown in figure 3, also including housing axis hole
21st, housing screw hole 22, housing boss 23, as shown in figure 3, also include circuit board fixing hole 25, upper magnetic protective plate threading hole 26,
Upper magnetic protective plate fixing hole 27, cover plate fixing hole 28, as shown in Fig. 2 also including cover plate threading hole 29, as shown in figure 4, magnetic is sensed
Device is connected by conductor jointer 30 with wire.
In the lower groove that bearing is arranged on to enclosure interior, the long end of rotating shaft through after the intermediate shaft hole of bearing on housing
Housing axis hole is passed；
Lower magnetic protective plate is installed in the bracket groove of enclosure interior, and lower magnetic protective plate outer rim has three lower magnetic protection board slots, three
Magnetic protection board slot coordinates the fixation completed to lower magnetic protective plate with three fins on bracket groove inwall under bar；
Rotating shaft upper end passes the shaft hole of lower magnetic protective plate from the bottom to top, and permanent magnet is installed in capel；
Circuit board is installed on the fin of housing bracket groove, and the center of Magnetic Sensor is on the axis of permanent magnet, and magnetic is passed
The surface of sensor is vertical with the axis of permanent magnet, and circuit board is fixed on the top surface of fin by three inner bolts；
Upper magnetic protective plate is installed in groove, and upper magnetic protective plate lower surface is contacted with upper groove bottom；Cover plate is installed on groove
In, cover plate is passed through after cover plate fixing hole and upper magnetic protective plate fixing hole by male screw thread, is fixed on the screw hole in groove bottom
Upper (upper magnetic protective plate is clamped by the bottom surface of cover plate and upper groove), wire one end is connected on conductor jointer, and the other end passes through upper
Hull outside is extended to after protective ring in magnetic protective plate threading hole and cover plate threading hole.
The course of work of the present invention is as follows：
For example, in compact conformation, the numerous and densely arranged ATM of other perceptual electric devices such as motor, electromagnet is followed
, it is necessary to carry out the rotating speed of each motor of measuring apparatus using high-resolution rotary encoder in ring movement equipment；Because equipment is in work
When making, because multiple-motor, electromagnet action can produce electromagnetic interference and wideband vibration, can cause common encoder by mistake output or
Mechanical breakdown；During using banknote sensing system magnetic rotary encoder in the present invention, the rotating shaft of encoder and the biography of equipment
Motivation structure is connected by gear or timing belt, the axis of rotation of rotary encoder is driven when equipment operation, so as to cause fixation
Rotating shaft one end permanent magnet along magnet center axle rotation, be encoded along encoder shaft axis and the external interference signals that come
Protection mechanism inside device absorbs, shielding, and the rotating excitation field of magnetic sensor detection permanent magnet is simultaneously digitized processing, finally
Other electronic devices in pulse corresponding with the permanent magnet anglec of rotation, equipment are exported by wire and directly or indirectly use coding
The pulse signal of device output obtains the running speed or angle value of equipment motor, and then the work for passing through this numerical control device
(as found, speed is not up to desin speed, can increase or reduce accordingly motor speed).
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
Read after the content of the invention lectured, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (8)
1. a kind of banknote sensing system magnetic rotary encoder, it is characterized in that, including the housing of end opening up and down（1）, one end
Stretch out the rotating shaft being made up outside housing lower end and of non-magnet_conductible material（2）, the axle for being sheathed in rotating shaft and being contacted with inner walls
Hold（3）, the capel in the middle part of rotating shaft upper surface（4）, the permanent magnet in capel（5）, in rotating shaft be used for eliminate
The lower magnetic protective plate of external magnetic signal below permanent magnet（6）, the circuit board in the inner walls above permanent magnet（7）,
Magnetic Sensor on circuit board lower surface（8）, the upper magnetic protective plate in the inner walls on circuit board top（9）If,
Cover plate in housing upper end（10）, the wire electrically connected with Magnetic Sensor（11）Stretch out outside housing；Upper magnetic protective plate and circuit
Gap is provided between plate, gap is provided between lower magnetic protective plate and rotating shaft, rotating shaft is provided with gap, the permanent magnet with inner walls
Rounded, permanent magnet and Magnetic Sensor are respectively positioned on the axial line of rotating shaft, and lower magnetic protective plate and upper magnetic protective plate use iron oxygen
Body material is made；
The thickness of lower magnetic protective plate and upper magnetic protective plate is 1.8 times to 2.5 times of permanent magnetism body thickness；On the lower magnetic protective plate
The height on surface is higher than the height of permanent magnet lower surface, and the distance of lower magnetic protective plate upper surface and permanent magnet lower surface is permanent magnet
The 1/2 to 5/8 of thickness；
The lower magnetic protective plate includes being located at the shaft hole in the middle part of lower magnetic protective plate（12）, a diameter of permanent magnet diameter of shaft hole
1.5 times to 1.7 times.
2. banknote sensing system magnetic rotary encoder according to claim 1, it is characterized in that, the housing it is transversal
Face, lower magnetic protective plate, circuit board, upper magnetic protective plate and cover plate are rounded；
The Magnetic Sensor is located at the upper groove tapered into circuit board center, the housing provided with diameter（13）, bracket groove
（14）With lower groove（15）；The bearing is located in lower groove, and bearing is interference fitted with lower cell wall, lower the magnetic protective plate and circuit board
Be respectively positioned in bracket groove, lower magnetic protective plate and middle cell wall interference fits, the upper magnetic protective plate is located in upper groove, upper magnetic protective plate with
Upper cell wall gap coordinates.
3. banknote sensing system magnetic rotary encoder according to claim 1, it is characterized in that, the circuit board it is upper
Surface is covered with copper sheet.
4. banknote sensing system magnetic rotary encoder according to claim 2, it is characterized in that, the periphery of the rotating shaft
Face top is provided with annular boss（16）, annular boss is provided with several flutings（17）, annular boss is with lower cell wall provided with gap.
5. banknote sensing system magnetic rotary encoder according to claim 1, it is characterized in that, the permanent magnet it is straight
Footpath is 5 with thickness ratio:2 to 7:3.
6. banknote sensing system magnetic rotary encoder according to claim 1, it is characterized in that, the permanent magnet upper table
Face is concordant with capel upper surface.
7. banknote sensing system magnetic rotary encoder according to claim 1, it is characterized in that, the Magnetic Sensor with
Spacing between permanent magnet is the 1/2 to 5/8 of permanent magnetism body thickness.
8. the banknote sensing system magnetic rotary encoder according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is special
Levying is, the gap between upper magnetic protective plate and circuit board is 0.8 mm to 1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741467.6A CN105387877B (en) | 2015-11-04 | 2015-11-04 | Banknote sensing system magnetic rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741467.6A CN105387877B (en) | 2015-11-04 | 2015-11-04 | Banknote sensing system magnetic rotary encoder |
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| Publication Number | Publication Date |
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| CN105387877A CN105387877A (en) | 2016-03-09 |
| CN105387877B true CN105387877B (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510741467.6A Active CN105387877B (en) | 2015-11-04 | 2015-11-04 | Banknote sensing system magnetic rotary encoder |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI663382B (en) * | 2018-11-27 | 2019-06-21 | 創磁微測股份有限公司 | Magnetic sensor |
| CN112537707A (en) * | 2019-09-23 | 2021-03-23 | 杭州沪宁电梯部件股份有限公司 | Roller sensor |
| CN112880539A (en) * | 2021-01-19 | 2021-06-01 | 天津中科华誉科技有限公司 | Non-contact position detection device |
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| CN2766853Y (en) * | 2004-11-04 | 2006-03-29 | 汤卓然 | High-precision high-reliability continuous subcutaneous drug transfusion equipment |
| CN101201257A (en) * | 2007-12-24 | 2008-06-18 | 孙成 | Magnetic rotary encoder |
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| CN102494605A (en) * | 2011-11-28 | 2012-06-13 | 常州市万翔车辆部件有限公司 | Non-contact type angular sensor for automobile electronic accelerator |
| CN102623780A (en) * | 2012-04-28 | 2012-08-01 | 成都泰格微波技术股份有限公司 | Magnetic shield assembly of circulator |
| EP2549236A1 (en) * | 2011-07-18 | 2013-01-23 | Honeywell International Inc. | Stationary magnet variable reluctance magnetic sensors |
| CN104101746A (en) * | 2014-07-23 | 2014-10-15 | 宁波南车时代传感技术有限公司 | Magnetic shielding structural part of magnetic modulation voltage transducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09145306A (en) * | 1995-11-29 | 1997-06-06 | Yazaki Corp | Rotation detector |
| KR100386845B1 (en) * | 2000-10-16 | 2003-06-09 | 엘지산전 주식회사 | Electrode structure for vacuum interrupter using aial magnetic field |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2766853Y (en) * | 2004-11-04 | 2006-03-29 | 汤卓然 | High-precision high-reliability continuous subcutaneous drug transfusion equipment |
| CN101201257A (en) * | 2007-12-24 | 2008-06-18 | 孙成 | Magnetic rotary encoder |
| CN101452062A (en) * | 2008-12-26 | 2009-06-10 | 重庆大学 | Magnetic induction measurement sensor shielding box for shielding electric field |
| EP2549236A1 (en) * | 2011-07-18 | 2013-01-23 | Honeywell International Inc. | Stationary magnet variable reluctance magnetic sensors |
| CN102494605A (en) * | 2011-11-28 | 2012-06-13 | 常州市万翔车辆部件有限公司 | Non-contact type angular sensor for automobile electronic accelerator |
| CN102623780A (en) * | 2012-04-28 | 2012-08-01 | 成都泰格微波技术股份有限公司 | Magnetic shield assembly of circulator |
| CN104101746A (en) * | 2014-07-23 | 2014-10-15 | 宁波南车时代传感技术有限公司 | Magnetic shielding structural part of magnetic modulation voltage transducer |
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| CN105387877A (en) | 2016-03-09 |
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Effective date of registration: 20210826 Address after: 310000 No. 66 Dongxin Avenue, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: EASTCOM Inc. Address before: 310000 A318, R & D building, Dongxin City, No. 66, Dongxin Avenue, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: EASTCOM Inc. Patentee before: Hangzhou Eastcom Financial Technology Service Co.,Ltd. |
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