CN207717105U - A kind of passive wake-up formula encoder - Google Patents
A kind of passive wake-up formula encoder Download PDFInfo
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- CN207717105U CN207717105U CN201721768981.XU CN201721768981U CN207717105U CN 207717105 U CN207717105 U CN 207717105U CN 201721768981 U CN201721768981 U CN 201721768981U CN 207717105 U CN207717105 U CN 207717105U
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Abstract
The utility model provides a kind of passive wake-up formula encoder, it is related to encoder technical field, a kind of passive wake-up formula encoder, encoder code disc, the magnetic part that is set in shaft and the magnetic induction device in the magnetic field range of magnetic part including shaft, along rotating shaft core rotation, magnetic induction device includes the first magnetic induction device and the second magnetic induction device, first magnetic induction device and the second magnetic induction device may be contained on circuit board, and the counting unit being electrically connected with magnetic induction device is provided on circuit board.A kind of passive formula encoder that wakes up of the utility model is waken up using passive, effectively reduces power consumption, the service life of encoder is long.
Description
Technical field
The utility model is related to encoder technical field,
Especially, the utility model is related to a kind of passive wake-up formula encoders.
Background technology
Encoder is an accurate position measurement sensor, for measure displacement either angle by analog quantity or
Digital quantity characterizes surveyed object.
Encoder is of high cost, short life for existing machinery.Traditional electronics encoder stops in external power supply
After power supply, turnning circle loss of data, when encoder is reworked, number of turns data will be classified as default value again.
When encoder is under static or inventory status, periodic wakeup is needed, to confirm whether encoder generates rotation
Turn, according to Shannon's sampling theorem, for correct reliable counting, the wakeup frequency of counting unit has to be larger than encoder and rotating through
Twice of multi-turn pulse signal frequency in journey, in order to ensure reliable in Practical Project, at 10 times or so.It greatly increases in this way
The power consumption of encoder, and the power consumption of encoder determines the service life of stand-by power supply, then the service life of encoder can be by
To very big influence.
Such as Chinese patent patent of invention CN103940457A is related to a kind of low-power consumption of electronic type encoder meter circle
Implementation method, belong to a kind of method for realizing low power consumption of encoder meter circle.Using with individual pen vernier code absolute location information
With the grating of two Gray code information of multi-turn, multi-turn counts part and works independently with individual pen part, and multi-turn counts part with interval
Mode works, at work between in T1, multi-turn counts part driving luminous tube and photelectric receiver work, and in " suspend mode " state
Under, the advantages of multi-turn counts part and stops powering to photelectric receiver and luminous tube, above-mentioned utility model is, after a power failure, work(
Consume it is low, can in the case where encoder rotates for a long time meter record turnning circle.
But under this mode, it is necessary to according to Shannon's sampling theorem, every time using actively wake-up, it will consume extra work(
The power consumption of consumption, encoder is still not low enough, and actively wake-up and suspend mode can cause the error or failure that count repeatedly.
Utility model content
The first of the utility model be designed to provide a kind of more low-power consumption, even super low-power consumption, service life
The encoder greatly prolonged.
It is achieved to solve the above problems, the utility model adopts the following technical solution：
A kind of passive wake-up formula encoder, including shaft, the encoder code disc along rotating shaft core rotation, setting
It is arranged on the magnetic part in the shaft and the circuit board with encoder code disc general parallel orientation setting, the circuit board
The counting unit for having magnetic induction device and being electrically connected with the magnetic induction device, the magnetic induction device include the first magnetic inductor
Part and the second magnetic induction device, the first magnetic induction device and the second magnetic induction device are respectively positioned on the magnetic field model of the magnetic part
In enclosing.
Preferably, the magnetic induction device is tunnel magnetoresistance element.
Preferably, the magnetic part is annular magnet part.
Preferably, the rotation center of the magnetic part and the rotation center of shaft be on the same axis.
Preferably, the circuit board and the encoder code disc general parallel orientation.
Preferably, the quantity of the first magnetic induction device and the second magnetic induction device is at least one.
Preferably, the formed folder of the axis direction of the axis direction of the first magnetic induction device and the second magnetic induction device
Angular region is any angle other than 180 °.
Preferably, the formed folder of the axis direction of the axis direction of the first magnetic induction device and the second magnetic induction device
It is arc that angular region, which is 80 ° to 100 °,.
The another object of the utility model is to expand a kind of passive wake-up formula encoder of the utility model
Protection domain proposes a kind of working method of passive wake-up formula encoder, includes the following steps：
S1：Magnetic induction device is set in the magnetic field range of magnetic part；
S2：Magnetic induction device is monitored magnetic field intensity；
S3：When magnetic part rotates, after magnetic induction device sense changes in magnetic fields, level changes, synchronized wake-up
Counting unit works；
S4：When magnetic part stops operating, the level of magnetic induction device stops variation, and counting unit enters dormant state,
Return to step S2.
Preferably, before executing step S1, magnetic induction device is set to tunnel magnetoresistance element.
Preferably, it when executing step S3, wakes up multi-turn counting unit and is counted, wakeup frequency follows rotation speed in real time
Degree.
A kind of passive formula encoder advantageous effect that wakes up of the utility model is：It is waken up using passive, is effectively reduced
The service life of power consumption, encoder is long.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model one embodiment；
Fig. 2 is the structural schematic diagram of the circuit board of the utility model one embodiment；
Fig. 3 is the polar structure schematic diagram of the magnetic part of the utility model one embodiment；
In figure：1, shaft, 2, encoder code disc, 3, magnetic part, 4, circuit board, 5, magnetic induction device, the 51, first magnetic induction
Device, the 52, second magnetic induction device.
Specific implementation mode
The utility model is described further with reference to the accompanying drawings and examples.
When encoder is under static or inventory status, periodic wakeup is needed, to confirm whether encoder generates rotation
Turn, according to Shannon's sampling theorem, for correct reliable counting, the wakeup frequency of counting unit has to be larger than encoder and rotating through
Twice of multi-turn pulse signal frequency in journey, in order to ensure reliable in Practical Project, at 10 times or so.It greatly increases in this way
The power consumption of encoder, and the power consumption of encoder determines the service life of stand-by power supply, then the service life of encoder can be by
To very big influence.
Embodiment one：As shown in Figures 1 to 3, only one of the utility model embodiment, a kind of passive wake-up formula are more
Enclose encoder, including shaft 1, the encoder code disc 2 along the rotation of 1 axle center of the shaft, the magnetic part that is set in the shaft 1
3 and with 2 general parallel orientation of the encoder code disc setting circuit board 4, the magnetic part 3 it is at least part of be arc, institute
State the counting unit for being provided with magnetic induction device 5 on circuit board 4 and being electrically connected with the magnetic induction device 5, the magnetic inductor
Part 5 includes the first magnetic induction device 51 and the second magnetic induction device 52, the first magnetic induction device 51 and the second magnetic inductor
Part 52 is respectively positioned in the magnetic field range of the magnetic part 3.
The rotation of encoder can drive the rotation of shaft 1, and so as to cause the rotation of magnetic part 3, magnetic field intensity will will produce
Change, the magnetic induction device 5 in 3 magnetic field range of magnetic part is collected changing magnetic field intensity, the magnetic of any point in space
The cyclically-varying that field intensity occurs can cause the voltage signal of magneto sensor output or mistor impedance that same rule occurs
Cyclically-varying, these electronic signals upload to counting unit, complete to count.
The utility model focuses on, and the magnetic induction device 5 is tunnel magnetoresistance element.
Using tunneling magnetoresistance, tunnel current and tunnel resistor take dependent on two the opposite of the ferromagnetic layer intensity of magnetization
To when the direction of magnetization changes, tunneling resistance changes.
Tunnel magnetoresistive（Magnetic Tunnel Junction, MTJ）Element has better temperature stability, higher
Sensitivity, lower power consumption, the better linearity do not need additional magnetism gathering rings structure relative to Hall element, and are not required to
Want additional set/reset loop constructions.
Magnetic induction device 5 is tunnel magnetoresistance element, and when under encoder remains static, magnetic induction device 5 is in pole
Low power consumpting state as enters suspend mode.
When encoder rotates, the magnetic part 3 of the annular in shaft 1 can be with 1 synchronous rotary of shaft, magnetic induction device 5
After perceiving change of magnetic field strength, level changes, and to flip-flop number cell operation, after hours, whole system is again
It is restored to extremely low power dissipation state.
Encoder is run in this way by way of passively waking up, overall power is greatly reduced, and the longevity is used
Life can obtain it is extended in the case of, still can accurately be counted at the moment.
Embodiment two, as shown in Figures 1 to 3, only one of present invention embodiment, in the present invention, circuit board 4
There are many may for setting：
For example, circuit board 4 and 2 general parallel orientation of encoder code disc；
Circuit board 4 is in 2 either above or below of encoder code disc at this time, be located at 3 magnetic field range of magnetic part in part compared with
It is more, it is relatively simple for structure.
Alternatively, circuit board 4 is vertically arranged with encoder code disc 2；
Circuit board 3 is supported by circuit board support at this time, and circuit board support is then in encoder code disc side, circuit board support
It is then fixedly connected with installation board, structure is more stable.
Generally speaking, ranging from 0 ° to 180 ° of angulation between circuit board 4 and encoder 2.
According to the specification of encoder, material and using difference, different setting directions can be selected, it is thus only necessary to change electricity
The placement direction of road plate 4.
Embodiment three, as shown in Figures 1 to 3, only one of the utility model embodiment, in order to which above-mentioned multi-turn encodes
Device is preferably counted, and also other are designed.
First, the magnetic part 3 is annular magnet part.
Tunnel current and tunnel resistor depend on the relative orientation of two ferromagnetic layer intensity of magnetization, when the direction of magnetization becomes
When change, tunneling resistance changes, and magnetic part 3 can be the polar structure of multiple magnetic poles, reach the magnetic field effect of two magnetospheres,
So that when encoder rotation, the variation in magnetic field is more easy to cause the level change of magnetic induction device 5.
Moreover, the rotation center of the magnetic part 3 and the rotation center of shaft 1 are on the same axis.
In fact, shaft 1 or magnetic part.The rotation of itself of shaft 1 can also directly play wake-up counting unit
Effect.
The error meeting smaller that such magnetic field 3 occurs, encoder to count are more accurate.
Then, the quantity of the first magnetic induction device 51 and the second magnetic induction device 52 is at least one.
Magnetic induction device 5 at least there are two, for distinguishing the direction of magnetic field rotating.Anti-interference ability enhances, and wakes up and counts
It is more accurate to the counting of encoder rotation.
Wherein, formed by the axis direction of the first magnetic induction device 51 and the axis direction of the second magnetic induction device 52
Angular range is any angle other than 180 °.
That is, having certain angle between the first magnetic induction device 51 and the second magnetic induction device 52, then to magnetic
The variation of field, anti-interference ability are stronger.
If reaching best detection angles, the axis direction and the second magnetic inductor of the first magnetic induction device 51
Angular range formed by the axis direction of part 52 is 80 ° to 100 °.
Angle formed by the axis direction of the first magnetic induction device 51 and the axis direction of the second magnetic induction device 52
It is advisable close to 90 °, anti-interference ability at this time is best, under this angle.When one of magnetic induction device is located at the magnetic field South Pole
When at center, another magnetic induction device is located at magnetic field north edge, the change allelopathic of rotation and magnetic field intensity for encoder
Should be most sensitive, it is most effective that counting unit is waken up and worked, it is not easy to malfunction.
Example IV, only one of the utility model embodiment,
The utility model wakes up formula encoder to help to understand that above-mentioned one kind is passive, it is also proposed that one kind is passively called out
The working method of formula of waking up encoder, this working method include the following steps：
S1：Magnetic induction device is set in the magnetic field range of magnetic part；
S2：Magnetic induction device is monitored the magnetic field intensity of magnetic part；
Magnetic induction device at this time should be the state of super low-power consumption, play the role of monitoring to the changes of magnetic field of magnetic part.
S3：When magnetic part rotates, after magnetic induction device perceives the variation of magnetic field intensity, level changes, together
Step wakes up counting unit work；
When encoder rotates, annular magnet part is with 1 synchronous rotary of shaft, the sense of magnetic induction device 5 on encoder code disc 2
After knowing changes of magnetic field, level changes, to flip-flop number cell operation.
S4：When magnetic part stops operating, magnetic induction device level stops variation, and counting unit enters dormant state, returns
Return step S2.
It is, counting unit is after hours, when magnetic part stops operating, magnetic field intensity also stops changing, magnetic strength
Device level is answered to stop variation, then whole system is again restored to extremely low power dissipation state, magnetic induction device continues to magnetic part
Changes of magnetic field play the role of monitoring.
In the above method, before executing step S1, it sets magnetic induction device to tunnel magnetoresistance element.
Tunnel current and tunnel resistor depend on the relative orientation of two ferromagnetic layer intensity of magnetization, when the direction of magnetization becomes
When change, tunneling resistance changes.
When encoder rotates, after 5 sense changes in magnetic fields of magnetic induction device, level changes, to flip-flop number list
Member work.
In the above method, when executing step S3, wakes up multi-turn counting unit and counted, wakeup frequency follows rotation in real time
Speed.
In fact, wakeup frequency i.e. power consumption and the rotary speed of encoder are in a linear relationship, with the rotation of encoder
Rotary speed becomes larger, and wakeup frequency is also higher.
It is, encoder rotation is faster, the electric current of consumption is bigger, and the counting frequency of counting unit is higher, in this way can be with
According to the rotating speed of encoder, accordingly counted.The efficiency and precision higher of counting.
A kind of passive formula encoder that wakes up of the utility model is waken up using passive, effectively reduces power consumption, encoder
Service life is long.
The utility model is not limited to above-mentioned specific embodiment, and various modifications and changes may be made to the present invention.
Every foundation the technical essence of the utility model, should all to embodiment of above any modification, equivalent replacement, improvement and so on
Included in the scope of protection of the utility model.
Claims (7)
1. a kind of passive wake-up formula encoder, it is characterised in that：Including shaft（1）, along the shaft（1）Axle center rotation
Encoder code disc（2）, be set to the shaft（1）On magnetic part（3）And it is located at the magnetic part（3）Magnetic field range in
Magnetic induction device（5）, the magnetic induction device（5）Including the first magnetic induction device（51）With the second magnetic induction device（52）,
The first magnetic induction device（51）With the second magnetic induction device（52）It may be contained within circuit board（4）On, the circuit board（4）On
It is provided with and the magnetic induction device（5）The counting unit of electrical connection.
2. a kind of passive wake-up formula encoder according to claim 1, it is characterised in that：The magnetic induction device
（5）For tunnel magnetoresistance element.
3. a kind of passive wake-up formula encoder according to claim 1, it is characterised in that：The magnetic part（3）For
Annular magnet part.
4. a kind of passive wake-up formula encoder according to claim 3, it is characterised in that：The magnetic part（3）'s
Rotation center and shaft（1）Rotation center is on the same axis.
5. a kind of passive wake-up formula encoder according to claim 1, it is characterised in that：First magnetic inductor
Part（51）With the second magnetic induction device（52）Quantity be at least one.
6. a kind of passive wake-up formula encoder according to claim 5, it is characterised in that：First magnetic inductor
Part（51）Axis direction and the second magnetic induction device（52）Axis direction formed by angular range be 180 ° other than it is arbitrary
Angle.
7. a kind of passive wake-up formula encoder according to claim 6, it is characterised in that：First magnetic inductor
Part（51）Axis direction and the second magnetic induction device（52）Axis direction formed by angular range be 80 ° to 100 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721768981.XU CN207717105U (en) | 2017-12-18 | 2017-12-18 | A kind of passive wake-up formula encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721768981.XU CN207717105U (en) | 2017-12-18 | 2017-12-18 | A kind of passive wake-up formula encoder |
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| Publication Number | Publication Date |
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| CN207717105U true CN207717105U (en) | 2018-08-10 |
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ID=63056312
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| CN201721768981.XU Active CN207717105U (en) | 2017-12-18 | 2017-12-18 | A kind of passive wake-up formula encoder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI724341B (en) * | 2018-11-01 | 2021-04-11 | 台達電子工業股份有限公司 | Rotation detection device and encoder and motor using same |
| US11085797B2 (en) | 2018-11-01 | 2021-08-10 | Delta Electronics, Inc. | Rotation detecting device, encoder, and motor |
| CN113847934A (en) * | 2021-09-24 | 2021-12-28 | 深圳市灵犀自动化技术有限公司 | Position determination method and device of hybrid encoder |
-
2017
- 2017-12-18 CN CN201721768981.XU patent/CN207717105U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI724341B (en) * | 2018-11-01 | 2021-04-11 | 台達電子工業股份有限公司 | Rotation detection device and encoder and motor using same |
| US11085797B2 (en) | 2018-11-01 | 2021-08-10 | Delta Electronics, Inc. | Rotation detecting device, encoder, and motor |
| CN113847934A (en) * | 2021-09-24 | 2021-12-28 | 深圳市灵犀自动化技术有限公司 | Position determination method and device of hybrid encoder |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220728 Address after: Room 401, building 9, 36 Changsheng South Road, Jiaxing Economic and Technological Development Zone, Zhejiang 314000 Patentee after: Zhejiang Ruiying Sensing Technology Co.,Ltd. Address before: 314001 room 2f227, No. 705, Asia Pacific Road, Daqiao Town, Nanhu District, Jiaxing City, Zhejiang Province Patentee before: JIAXING REAGLE SENSING TECHNOLOGY CO.,LTD. |