CN108286990A - A kind of sensor with Dual-path backup signal - Google Patents
A kind of sensor with Dual-path backup signal Download PDFInfo
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- CN108286990A CN108286990A CN201810280943.2A CN201810280943A CN108286990A CN 108286990 A CN108286990 A CN 108286990A CN 201810280943 A CN201810280943 A CN 201810280943A CN 108286990 A CN108286990 A CN 108286990A
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- magnetic induction
- encoder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
Abstract
The invention discloses the sensor with Dual-path backup signal, including magnetic encoder and sensor body assembly, the acquisition of sensor body assembly comes from the variation magnetic field of spin magnetization encoder generation, and synchronism output two-way absolute magnitude formula signal.The present invention can allow sensor to export mutually redundant two-way absolute magnitude formula signal to controller, greatly reduce the probability that permanent magnet synchronous motor can not be run by sensor signal failure.
Description
Technical field
The present invention relates to Detection Techniques, and in particular to sensor technology.
Background technology
Permanent magnet synchronous motor is largely used in electric vehicle and hybrid electric vehicle, in actual use, is needed to permanent magnetism
Synchronous motor carries out accurate speed and moment of torsion control.
T ∝ ψ * i (q) in permanent magnet synchronous motor torque expression formula, wherein ψ are permanent magnet magnetic field intensities, are invariable
, that is, control q axis stator current can directly control the torque of motor.In practical application, need to use sensor
To determine permanent magnet pole position.Especially when low frequency or 0 speed operation, heavy load starting, accurate torque control is needed
When, more need position sensor that the pole position information of permanent magnet is transferred to controller.
The common sensor of permanent magnet synchronous motor at present in electric vehicle and hybrid electric vehicle is magnetic sensor and rotation
Turn transformer sensor etc..
Magnetic sensor is also frequently referred to as magneto-electric encoder, and principle is using magnetic resistance or Hall element to variation
Magnetic material angle or shift value measure.The variation of magnetic material angle or displacement can cause certain resistance or
The variation of person's voltage, can output signal using the signal processing of circuit.
Magnetic flux distribution between the stator and rotor of rotary transformer sensor meets sinusoidal rule, therefore works as excitation voltage
When being added on stator winding, by electromagnetic coupling, rotor windings generate induced electromotive force.The size of its output voltage depends on turning
The angular position of son, i.e., as the angle of rotor displacement is in sinusoidal variations.The machinery that the phase angle of induced voltage is equal to rotor turns
Angle.As long as therefore detecting the phase angle of rotor output voltage, it is known that the corner of rotor.
This kind of sensor haves the shortcomings that many in actual application process, such as：
1. existing magnetic sensor and rotary transformer sensor, once sensor is damaged, using permanent-magnet synchronous
The electric vehicle and hybrid electric vehicle of motor can not just continue to exercise.
2. traditional magnetic sensor low precision itself.
3. rotary transformer sensor is due to the limitation of itself operation principle.
Invention content
For the problems of existing permanent magnet synchronous motor sensor, a kind of sensor of new high reliability is needed
Scheme.
For this purpose, problem to be solved by this invention is to provide a kind of sensor with Dual-path backup signal, it is existing to overcome
There is the defect present in technology.
To solve the above-mentioned problems, the sensor provided by the invention with Dual-path backup signal comprising magnetic code
Device and sensor body assembly, the sensor body assembly acquisition come from the variation magnetic of spin magnetization encoder generation
, and synchronism output two-way absolute magnitude formula signal.
Preferably, the sensor body assembly synchronizes induction spin magnetization encoder production by two-way inductive pick-up unit
Raw variation magnetic field forms two groups of corresponding voltage signals, and is calculated based on two groups of voltage signals and export two groups of absolute magnitude formula letters
Number.
Preferably, the sensor body assembly includes two groups of magnetic induction units and circuit board, every group of magnetic induction unit
Including several magnetic induction chips, several magnetic induction chips in two groups of magnetic induction units are disposed in a circumferential direction respectively in electricity
It on the plate of road, and is distributed in concentric circles between two groups of magnetic induction chips, shape on the inside of two groups of magnetic induction chips being along the circumferential direction distributed
At round induction region, which coordinates with magnetic encoder, can hold that annular magnet encoder is non-contacting, can turn
Dynamic is placed in it；There are two groups of signal processing circuits, if being separately connected in two groups of magnetic induction units in the circuit board
Dry magnetic induction chip.
Preferably, alternate along same circumferencial direction successively between several magnetic induction chips in two groups of magnetic induction units
Distribution.
Preferably, every group of magnetic induction unit includes 1 to 36 magnetic induction chips.
Preferably, the magnetic encoder is in Sine distribution by the magnetic field in performance period of magnetizing.
Preferably, the magnetic encoder can magnetize multipair magnetic pole in tour.
Preferably, while the magnetic encoder is rotated with target object, the continuous magnetic field of mechanical periodicity is exported.
The present invention can allow sensor to export mutually redundant two-way absolute magnitude formula signal to controller, greatly reduce permanent magnetism
The probability that synchronous motor can not be run by sensor signal failure.
Meanwhile the high certainty of measurement of the magnetic code sensor, response time are fast and simple for process, long lifespan can work
In the environment of high temperature, greasy dirt.
Furthermore the circuit design of the magnetic code sensor is simple, and realization method is ingenious, to which Innovation Input is few, cost
It is low.
Description of the drawings
It is further illustrated the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the schematic diagram of the sensor with Dual-path backup signal in present example；
Fig. 2 is the sectional view of the sensor with Dual-path backup signal in present example；
Fig. 3 is the continuous magnetic field schematic diagram of the mechanical periodicity exported when magnetic encoder rotates in present example.
Fig. 4 is that the position of magnetic induction chip in sensor in present example arranges schematic diagram.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 1, show that there is the sensor of Dual-path backup signal for permanent magnet synchronous motor in present example
Basic composed structure.
As seen from the figure, having automatically to the sensor 100 of pole function for permanent magnet synchronous motor in this example, it is main to wrap
Include annular magnet encoder 110, sensor body assembly 120.
Wherein, the magnetic field that within the period (multiple periods can be arranged) in annular magnet encoder 110 in tour is in
Sine distribution, it is non-contacting to be embedded in sensor body assembly 120, and can be with target object in sensor body assembly
It is rotated in 120.
Thus the sensor 100 constituted, while annular magnet encoder 110 therein is rotated with target object, output
The continuous magnetic field of mechanical periodicity (in a swing circle, magnetic field intensity is in Sine distribution)；Sensor body assembly 120 then passes through
Two-way inductive pick-up unit synchronous acquisition comes from the variation magnetic field of spin magnetization encoder 110, forms two groups of corresponding synchronizations
Voltage signal, and the mutually redundant absolute magnitude formula signal of two groups of synchronism output is calculated based on two groups of voltage signals, it is based on the signal,
Rotation absolute angular position, rotary speed and direction of rotation can be accurately obtained.
For above-mentioned principle scheme, present principles scheme is further illustrated below by way of a concrete application example.
Annular magnet encoder 110 in this sensor 100 is mainly used for exporting different magnetization curves by rotating,
Loop sensor ontology assembly 120 is set to incude different magnetic field intensities.
Referring to Fig. 2 which shows the structural schematic diagram of annular magnetic encoder 110 in this example.As seen from the figure, the annular
Magnetic encoder 110 is mainly made of magnetic material 111 and the support mutual cooperation of retainer plate 112, and magnetic material 111 is solid along support
Surely the circumferencial direction of circle 112 is laid on the lateral surface of support retainer plate 112.
Here support retainer plate 112, be used to support and shape magnetic material 111, and prevents the broken of magnetic material 111
Damage, while also having the function of poly- magnetic (collection magnetic).It here, can be effective by the collection magnetic function of retainer plate 112 (supporting retainer plate)
External magnetic field is prevented to the interference of magnetic material 111, so that the magnetic line of force of magnetic material 111 is distributed more uniform, magnetic direction is poly-
To the radial direction of magnet ring, magnetic field intensity is more controllable.
Based on the annular magnet encoder 110 that said program is constituted, by the magnetic field in performance period of magnetizing in sine
Distribution, while thus this annular magnet encoder 110 is rotated with target object, by exportable mechanical periodicity as shown in Figure 3
Continuous magnetic field, magnetic field intensity be in Sine distribution.
Magnetic encoder 110 can magnetize the magnetic field of n mechanical periodicity, in the above scheme, n mono- in a swing circle
As be set as 1 to 20.
Referring to Fig. 4, the sensor body assembly 120 in this sensor 100 includes mainly circuit board 121, is arranged in circuit
Two groups of magnetic induction chips 122 on plate 121,125, and the conducting wire 123 that is connect with circuit board 121.
First group of magnetic induction chip 122 is made of several magnetic induction chips, and first group of magnetic induction chip 122 is arranged in circuit
On plate 121, as first group of sensing element in loop sensor ontology assembly 120, rotated for induced magnetism encoder 110
When the changes of magnetic field that generates, synchronize to form corresponding first via voltage signal.
Second group of magnetic induction chip 125 is equally made of several magnetic induction chips, and second group of magnetic induction chip 125 is arranged
On circuit board 121, as second group of sensing element in loop sensor ontology assembly 120, it to be used for induced magnetism encoder
The changes of magnetic field generated when 110 rotation, synchronizes to form corresponding second road voltage signal.
Magnetic induction chip 122 and 125 in this example is made of Hall or magnetoresistive chip, amounts to two groups, needed for every group
Quantity can be used 1 to 36 as needed.As an example, in this example approach every group use five magnetic induction chips.
As seen from the figure, first group of five magnetic induction chip 122 is disposed in a circumferential direction on circuit board 121, while on edge
The inside of the magnetic induction chip 122 and 125 of circumferencial direction distribution forms round induction region 124, the circle induction region 124
Size is corresponding with the size of annular magnet encoder 110, can hold that annular magnet encoder 110 is non-contacting, rotatable placement
In it.
Matched, second group of five magnetic induction chip 125 is also disposed in a circumferential direction on circuit board 121, and
It is distributed in concentric circles with first group of five magnetic induction chip 122；Simultaneously the magnetic induction chip 122 that is along the circumferential direction distributed with
125 inside also forms round induction region 124, size and the annular magnet encoder 110 of the circle induction region 124
Size corresponds to, and can hold that annular magnet encoder 110 is non-contacting, is rotatably placed in it.
Second group of five magnetic induction chip 125 is specifically with first group of five magnetic induction chip 122 along same circle in this example
Circumferential direction is placed on circuit board 121, and alternate is successively between the two equally spaced.So that the two is formed by circle
Induction region overlaps.Thus it may make second group of five magnetic induction chip 125 being capable of phase with first group of five magnetic induction chip 122
Mutually inductive pick-up independently and simultaneously rotates the variation magnetic field of magnetic encoder 110 in round induction region, and two groups of formation is only
Vertical synchronous voltage signal.Furthermore since two groups of induction chips are equally spaced along same circumference is alternate successively, it is formed by two groups
Synchronous voltage signal corresponds, and can backup each other.
As an alternative solution, two groups of magnetic induction chips can not be along same circle distribution, i.e., the radius of a circle of two groups distributions is not
Together, but the circumference of two groups of magnetic induction chip distributions is concentric.
On this basis, relative position relation between two groups of magnetic induction chips, can be used and stagger successively setting, specific wrong
The standard width of a room in an old-style house is away from can be depending on actual demand.
One-to-one correspondence distribution setting, i.e., second group of magnetic also can be used in relative position relation between two groups of magnetic induction chips
Induction chip 125 sets up separately with the one-to-one correspondence of magnetic induction chip 122 in first group to be set, and can guarantee two groups of two groups of magnetic strengths in this way
Mutual indepedent between chip and synchronous inductive pick-up is answered to rotate the variation magnetic of magnetic encoder 110 in round induction region
, form two groups of mutual indepedent and corresponding synchronous voltage signals each other.
Thus when annular magnet encoder 110 rotates, since the specific magnetic having on annular magnet encoder 110 is bent
Line so that magnetic field constantly changes on annular magnet encoder 110, and two groups of independently arranged magnetic induction chips 122 and 125
Respectively from the corresponding magnetic field signal of different location sensitives, and corresponding signal specific is exported, that is, passes through two groups of magnetic induction chips 122
The magnetic field signal for sensing different location with 125 corresponds to different location to export signal specific.
Circuit board 121 in this example is the Signal Processing Element in entire sensor 100, respectively with it is each in two groups
It is connect from five magnetic induction chips 122 with 125, receives and processes the annular magnetic encoder of the induction of magnetic induction chip 122 and 125
The periodical magnetic filed variation generated when 110 rotation is formed by voltage signal, exports absolute magnitude formula signal.
For the signal of efficiently accurate 122 and 125 transmission of processing magnetic induction chip, two are integrated in the circuit board 121
Counting circuit is covered, which is separately connected first group of five magnetic induction chip 122 and second group of five magnetic induction core
Piece 125, the voltage signal that two groups of induction chips of synchronous acquisition are collected and formed respectively, and respectively to the spy of magnetic induction chip
Determine signal and carry out addition of waveforms, is formed and export two groups of mutually redundant absolute magnitude formula signals.Here absolute magnitude formula signal can
Think Sin/Cos, SPI, SSI, CAN, RS422, RS485 etc., but it is not limited to this.
Conducting wire 123 in this example is the signal output component in entire sensor 100, one end and annular circuit board
121 output end connection, the other end can be connected with corresponding application circuit or equipment, and the signal that circuit board 121 is generated passes
Go out.
Can form non-contact type magnetic code sensor according to the embodiment above, the sensor when specifically used,
Magnetic encoder 110 therein is connect with object to be measured object, and can be rotated with target object；Simultaneously by loop sensor sheet
Body assembly 120 by thereon wait for that the harness 123 of connector is attached with corresponding application circuit or equipment.
Magnetic encoder 110 therein is in Sine distribution by the magnetic field in performance period of magnetizing, and magnetic encoder is with mesh
While marking object rotation, export the continuous magnetic field of mechanical periodicity (magnetic field intensity is in Sine distribution).
Sensor after power up, passes through 122,125 (Hall of magnetic induction chip respectively circumferentially on circuit boards
Or magnetoresistive chip) variation magnetic field for coming from the generation of spin magnetization encoder is acquired, it forms corresponding voltage signal and reaches
Circuit board 121.
Referring to Fig. 4, magnetic induction chip 122 and 125 be distributed annular magnetic encoder 110 along concentric circumferences respectively surrounding,
It is separated by 72 degree between adjacent magnetic induction chip in every group, when synchronizing 110 rotation of induced magnetism encoder from five different directions
The magnetic field intensity in sinusoidal variations generated, thus generates two Zu Ge, five road voltage signals, and synchronize and reach circuit board 121, this
When circuit board 121 on two sets of counting circuits operation is overlapped respectively to five road voltage signals of collected two Zu Ge respectively,
Two groups of absolute magnitude formula signals of final output.
In addition, this non-contact type magnetic code sensor uses contactless magnetic induction principle, have without abrasion, long-life
Feature；And its two groups internal of use, every group of 1 to 36 magnetic induction chips (Hall or magnetoresistive chip) arrangement, it greatly improves
Signal accuracy, and cost performance highest.
Furthermore this non-contact type magnetic code sensor integral moduleization designs, compact-sized, it is easy to collect with tested application
At such as bearing.
100 reliability of sensor that this example provides is high, can be used for the electric vehicle and hybrid electric vehicle of permanent magnet synchronous motor,
In actual use, even if signal all the way therein breaks down, electric machine controller is still using in addition signal pair all the way
Permanent magnet synchronous motor is accurately controlled so that vehicle still can be exercised normally.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. the sensor with Dual-path backup signal, including magnetic encoder and sensor body assembly, which is characterized in that
The sensor body assembly acquisition comes from the variation magnetic field of spin magnetization encoder generation, and synchronism output two-way absolute magnitude
Formula signal.
2. the sensor according to claim 1 with Dual-path backup signal, which is characterized in that the sensor body is total
The variation magnetic field that induction spin magnetization encoder generates is synchronized at by two-way inductive pick-up unit, forms two groups of corresponding voltages
Signal, and calculate two groups of absolute magnitude formula signals of output based on two groups of voltage signals.
3. the sensor according to claim 1 with Dual-path backup signal, which is characterized in that the sensor body is total
At including two groups of magnetic induction units and circuit board, every group of magnetic induction unit includes several magnetic induction chips, two groups of magnetic induction
Several magnetic induction chips in unit are disposed in a circumferential direction on circuit boards respectively, and in same between two groups of magnetic induction chips
Heart circle distribution, forms round induction regions on the inside of two groups of magnetic induction chips being along the circumferential direction distributed, the circle induction region and
Magnetic encoder coordinates, and can hold that annular magnet encoder is non-contacting, is rotatably placed in it；Have in the circuit board
Two groups of signal processing circuits, several magnetic induction chips being separately connected in two groups of magnetic induction units.
4. the sensor according to claim 3 with Dual-path backup signal, which is characterized in that in two groups of magnetic induction units
Several magnetic induction chips between successively it is alternate along same circumferencial direction be distributed.
5. the sensor according to claim 3 with Dual-path backup signal, which is characterized in that in every group of magnetic induction unit
Including 1 to 36 magnetic induction chips.
6. the sensor according to claim 1 with Dual-path backup signal, which is characterized in that the magnetic encoder is logical
It is in Sine distribution to cross the magnetic field magnetized in performance period.
7. the sensor according to claim 1 with Dual-path backup signal, which is characterized in that the magnetic encoder can
With the multipair magnetic pole that magnetizes in tour.
8. the sensor according to claim 1 with Dual-path backup signal, which is characterized in that the magnetic encoder with
While target object rotates, the continuous magnetic field of mechanical periodicity is exported.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280943.2A CN108286990A (en) | 2018-04-02 | 2018-04-02 | A kind of sensor with Dual-path backup signal |
| PCT/CN2019/080993 WO2019192470A1 (en) | 2018-04-02 | 2019-04-02 | Sensor having backup signals from two channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280943.2A CN108286990A (en) | 2018-04-02 | 2018-04-02 | A kind of sensor with Dual-path backup signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108286990A true CN108286990A (en) | 2018-07-17 |
Family
ID=62833766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810280943.2A Pending CN108286990A (en) | 2018-04-02 | 2018-04-02 | A kind of sensor with Dual-path backup signal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108286990A (en) |
| WO (1) | WO2019192470A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019192470A1 (en) * | 2018-04-02 | 2019-10-10 | 上海钧嵌传感技术有限公司 | Sensor having backup signals from two channels |
| CN114325075A (en) * | 2021-11-29 | 2022-04-12 | 北京航天控制仪器研究所 | Motor back electromotive force signal acquisition equipment for motor contact rotating speed tester |
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| US20050258820A1 (en) * | 2004-04-07 | 2005-11-24 | Bernhard Forster | Apparatus and method for the determination of a direction of an object |
| CN201764980U (en) * | 2010-09-07 | 2011-03-16 | 株洲威森机车配件有限公司 | Two-way Gray code magnetic encoder |
| CN102042840A (en) * | 2010-09-07 | 2011-05-04 | 株洲威森机车配件有限公司 | Two-channel Gray code magnetic coding device |
| CN102109361A (en) * | 2010-12-15 | 2011-06-29 | 天津埃柯特阀门控制设备有限公司 | Position detection device for electric executing mechanism |
| CN107270945A (en) * | 2017-05-10 | 2017-10-20 | 上海钧嵌传感技术有限公司 | A kind of automatic code sensor to pole |
| CN206638240U (en) * | 2017-04-06 | 2017-11-14 | 深圳市顺强自动化技术有限公司 | A kind of doubleway output motor encoder |
| CN208458756U (en) * | 2018-04-02 | 2019-02-01 | 上海钧嵌传感技术有限公司 | A kind of sensor with Dual-path backup signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286990A (en) * | 2018-04-02 | 2018-07-17 | 上海钧嵌传感技术有限公司 | A kind of sensor with Dual-path backup signal |
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2018
- 2018-04-02 CN CN201810280943.2A patent/CN108286990A/en active Pending
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2019
- 2019-04-02 WO PCT/CN2019/080993 patent/WO2019192470A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050258820A1 (en) * | 2004-04-07 | 2005-11-24 | Bernhard Forster | Apparatus and method for the determination of a direction of an object |
| CN201764980U (en) * | 2010-09-07 | 2011-03-16 | 株洲威森机车配件有限公司 | Two-way Gray code magnetic encoder |
| CN102042840A (en) * | 2010-09-07 | 2011-05-04 | 株洲威森机车配件有限公司 | Two-channel Gray code magnetic coding device |
| CN102109361A (en) * | 2010-12-15 | 2011-06-29 | 天津埃柯特阀门控制设备有限公司 | Position detection device for electric executing mechanism |
| CN206638240U (en) * | 2017-04-06 | 2017-11-14 | 深圳市顺强自动化技术有限公司 | A kind of doubleway output motor encoder |
| CN107270945A (en) * | 2017-05-10 | 2017-10-20 | 上海钧嵌传感技术有限公司 | A kind of automatic code sensor to pole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019192470A1 (en) * | 2018-04-02 | 2019-10-10 | 上海钧嵌传感技术有限公司 | Sensor having backup signals from two channels |
| CN114325075A (en) * | 2021-11-29 | 2022-04-12 | 北京航天控制仪器研究所 | Motor back electromotive force signal acquisition equipment for motor contact rotating speed tester |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019192470A1 (en) | 2019-10-10 |
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