CN109143122A - Hall sensor - Google Patents
Hall sensor Download PDFInfo
- Publication number
- CN109143122A CN109143122A CN201811099994.1A CN201811099994A CN109143122A CN 109143122 A CN109143122 A CN 109143122A CN 201811099994 A CN201811099994 A CN 201811099994A CN 109143122 A CN109143122 A CN 109143122A
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- module
- hall sensor
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
- G01R33/072—Constructional adaptation of the sensor to specific applications
-
- 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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/007—Environmental aspects, e.g. temperature variations, radiation, stray fields
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The present invention discloses a kind of Hall sensor, and wherein a kind of Hall sensor includes the differential pair and signal amplification module of power module, electric current drive module, N number of Hall plate composition；Power module provides power supply for modules all into Hall sensor；Electric current drive module, for providing constant driving current to Hall plate；Hall plate, for when sensing perpendicular magnetic field, generating the induced voltage signal mutually directly proportional to magnetic induction intensity, composition differential pair is for eliminating extraneous common mode interference；Amplification module, the induced voltage signal for exporting to Hall plate export after carrying out power amplification.Technical solution of the present invention can effectively avoid signal from, by the electromagnetic interference of sensor external, improving the measurement accuracy of Hall sensor in measurement process.
Description
Technical field
The present invention relates to sensor technical field, in particular to a kind of Hall sensor.
Background technique
Hall sensor is an energy converter, converts changing magnetic field to the variation of output voltage.Hall sensor energy
It is enough in measurement magnetic field, additionally can measure the physical quantity for generating and influencing magnetic field, such as be used to survey close to switch, position
Amount, tachometric survey and current measure device.
Such as Hall sensor detects electric current, and conductor to be detected is usually introduced sensor internal, is led by measuring this
The magnetic field that body generates obtains flowing through the size of current of the conductor.However Hall sensor works in the more complicated ring of electromagnetism
Border, the induced voltage signal generated after the variation of Hall plate induced magnetic field are easy to be caused output to amplification by outside electromagnetic interference
The distorted signals of device influences the precision of Hall sensor.
Summary of the invention
The main object of the present invention is to provide a kind of Hall sensor, it is intended to eliminate the interference of external magnetic field, improve Hall
The precision of sensor.
To achieve the above object, Hall sensor proposed by the present invention, including power module, electric current drive module, it is N number of suddenly
The differential pair and signal amplification module of your piece composition；Wherein N is even number, and N >=2；
The power module provides power supply for modules all into Hall sensor；
The electric current drive module, for providing constant driving current to the Hall plate；
The Hall plate, for generating the sense mutually directly proportional to magnetic induction intensity when sensing perpendicular magnetic field
Voltage signal is answered, composition differential pair is for eliminating extraneous common mode interference；
The amplification module, the induced voltage signal for exporting to the Hall plate export after carrying out power amplification.
Preferably, the output end of the power module is connect with the input terminal of the electric current drive module, and the electric current drives
The output end of dynamic model block and the driving end of multiple Hall plates are separately connected, the output end of the Hall plate and the amplification mould
The input terminal of block is separately connected；The output end of the amplification module exports amplified induced voltage signal.
Preferably, the Hall sensor further includes control module and reseting module；The first end of the reseting module with
The controlled end of the power module connects, and the second end of the reseting module is connect with the control terminal of the control module；It is described
Control module resets power module by the reseting module according to setting condition.
Preferably, the Hall sensor further includes temperature sensor, and the temperature sensor and the control module connect
It connects；
The temperature sensor, for detecting the operating temperature of Hall sensor；The control module is according to detecting
It states operating temperature and temperature-compensating is carried out to the induced voltage signal of output.
Preferably, the amplification module includes the first amplifier chip, the second amplifier chip, first capacitor, first resistor, the
Two resistance, 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance；
The first end of the first resistor is connect with the output end of the difference block, the second end of the first resistor with
The non-inverting input terminal of first amplifier chip connects；The output end of the first end of the second resistance and the difference block connects
It connects, the second end of the second resistance is connect with the inverting input terminal of first amplifier chip；The first of the 3rd resistor
End is connect with the inverting input terminal of first amplifier chip, the output of the second end of 3rd resistor and first amplifier chip
End connection；
The output end of first amplifier chip is connect with the first end of the 4th resistance, and the second of the 4th resistance
End is connect with the non-inverting input terminal of second amplifier chip, and the inverting input terminal of second amplifier chip is through the 5th electricity
Resistance ground connection；The first end of the first capacitor is connect with the second of the 4th resistance, the second end ground connection of the first capacitor；
The first end of 6th resistance is connect with the inverting input terminal of second amplifier chip, the output of second amplifier chip
End exports amplified induced voltage signal.
Preferably, the Hall sensor includes linear convergent rate module, and the linear convergent rate module is to the amplification module
The induced voltage signal of output exports after being adjusted.
Preferably, the linear convergent rate module includes bleeder circuit and linearity control circuit；The bleeder circuit receives sense
Voltage signal is answered, induced voltage signal is divided, the linearity control circuit carries out the induced voltage signal after partial pressure
It is exported after linear regulation.
Preferably, the Hall sensor further includes voltage regulator module, and the voltage regulator module is to the amplification mould
The induced voltage signal of block output exports after carrying out amplitude adjusting.
Preferably, the Hall sensor further includes protective module, the protection of the protective module and the amplification module
End is connect with the output end of the amplification module.
Preferably, the protective module includes zener diode, the plus earth of the zener diode, the pressure stabilizing two
The cathode of pole pipe is connect with the output end of the amplification module.
Technical solution of the present invention passes through setting power module, electric current drive module, at least two Hall plates and signal amplification
Module forms a kind of Hall sensor.Power module provides power supply, and electric current drive module provides constant electricity for Hall sensor
Stream, enables Hall plate to work normally.Amplification module described in the induced voltage signal output that multiple Hall plates incude,
It exports after amplification module carries out power amplification to external equipment.Technical solution of the present invention forms two components by multiple Hall plates
Not carry out signal acquisition, the voltage induced signal of acquisition forms differential signal effectively can avoid signal from existing so after processing
By external electromagnetic interference in transmission process, the measurement accuracy of Hall sensor is improved.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the first functional block diagram of one embodiment of Hall sensor of the present invention；
Fig. 2 is the second functional block diagram of one embodiment of Hall sensor of the present invention；
Fig. 3 is the structural schematic diagram of one embodiment of amplification module in Fig. 1.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 101 | Power module | 108 | Temperature sensor |
| 102 | Electric current drive module | 109 | Linear convergent rate module |
| 103 | Hall plate | 110 | Protective module |
| 104 | Compensating module | U1 | First amplifier chip |
| 105 | Amplification module | U2 | Second amplifier chip |
| 106 | Control module | R1~R6 | First resistor is to the 6th resistance |
| 107 | Reseting module | C1 | First capacitor |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
It is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also not the present invention claims protection
Within the scope of.
The present invention proposes a kind of Hall sensor.
Referring to Fig.1, in embodiments of the present invention, the Hall sensor include power module 101, electric current drive module 102,
The differential pair and amplification module 105 that N number of Hall plate 103 forms；Wherein N is even number, and N >=2；
The power module 101 provides power supply for modules all into Hall sensor.It should be noted that this reality
It applies in example, power module 101 is realized using the higher power supply chip of output voltage precision.The power supply chip can export it is multiple not
With the power supply of voltage value, to meet the power supply requirement of modules inside Hall sensor.
The electric current drive module 102, for providing constant driving current to the Hall plate 103.It is understandable
It is the driving current conduct that Hall sensor is provided in the higher bias current of need of work precision, electric current drive module 102
Bias current.
The Hall plate 103, for generating mutually directly proportional to magnetic induction intensity when sensing perpendicular magnetic field
Induced voltage signal.It should be noted that the power end of Hall plate 103 is connect with electric current drive module 102, Hall plate 103
Ground terminal ground connection.
It include N number of Hall plate (N is even number) in the present embodiment, portion is placed with N/2 to Hall plate in pairs in the chip,
The pairs of placement of 103 pairs of palpuses of these Hall plates needs to measure the both sides of the conductor of electric current, and the side of putting of Hall pair in the chips
To difference, to eliminate the electromagnetic interference from chip exterior all directions.N/2 is respectively induced magnetic field, generation and magnetic strength to Hall plate
Answer the induced voltage signal that intensity is mutually directly proportional, when two induced voltage signals receive external interference, can increase simultaneously or
Reduce, the difference of two signals is then constant.Two signals constitute differential signal, can effectively eliminate external interference.
The amplification module 105, it is defeated after the induced voltage signal progress power amplification for being exported to the Hall plate 103
Out.It can be readily appreciated that the signal of Hall plate output is weaker, need to amplify weaker signal with amplification module 105, with
Carry out power enhancing.
Technical solution of the present invention by setting power module 101, electric current drive module 102, at least two Hall plates 103 and
Signal amplification module 105 forms a kind of Hall sensor.Power module 101 provides power supply, and electric current drive module 102 is suddenly
You provide constant current by sensor, and Hall plate is worked normally.The induced voltage signal that multiple Hall plates incude
Amplification module 105 described in output export after amplification module 105 carries out power amplification to external equipment.The technology of the present invention side
Case forms two groups by multiple Hall plates and carries out signal acquisition respectively, and the voltage induced signal of acquisition forms differential signal, so
After processing, signal can effectively be avoided, by external electromagnetic interference, to improve the survey of Hall sensor in transmission process
Accuracy of measurement.
Referring to Fig. 2, in the present embodiment, the input of the output end of the power module 101 and the electric current drive module 102
End connection, the output end of the electric current drive module 102 and the driving end of multiple Hall plates 103 be separately connected, it is described suddenly
The input terminal of the output end and the amplification module 105 of your piece 103 is separately connected；The output end of the amplification module 105 exports
Amplified induced voltage signal.
Further, the Hall sensor further includes control module 106 and reseting module 107；The reseting module 107
First end connect with the controlled end of the power module 101, the second end of the reseting module 107 and the control module
106 control terminal connection；The control module 106 is according to setting condition, by the reseting module 107 to power module 101
It is resetted.
It should be noted that control module 106 can be resetted automatically according to the condition of setting, such as one timing of setting
Between after resetted, or resetted automatically after powering on, to improve the sensitivity of Hall sensor.
Further, the Hall sensor further includes compensating module 104, and the compensating module 104 is used to pass Hall
The voltage induced signal of sensor output exports after compensating correction.
Further, the Hall sensor further includes temperature sensor 108, the temperature sensor 108 and the control
Molding block 106 connects；The temperature sensor 108, for detecting the operating temperature of Hall sensor；The control module 106
Temperature-compensating is carried out to output voltage inductive signal according to the operating temperature detected.
It is worth noting that the voltage induced signal of output will receive the influence of the temperature of Hall sensor, pass through in advance
Experiment measures the relationship of voltage induced signal and temperature, in the mapping relations storage and control module 106 by the two.Control module
106 when getting current operating voltage, it will be able to obtain compensated voltage induced signal by way of tabling look-up, pass through benefit
It repays after module 104 is corrected and exports.In this way, improving the output accuracy of Hall sensor.
Specifically referring to Fig. 3, the amplification module 105 includes the first amplifier chip U1, the second amplifier chip U2, the first electricity
Hold C1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6；
The first end of the first resistor R1 is connect with the output end of the difference block 104, the first resistor R1's
Second end is connect with the non-inverting input terminal of the first amplifier chip U1；The first end of the second resistance R2 and the differential mode
The output end of block 104 connects, and the second end of the second resistance R2 is connect with the inverting input terminal of the first amplifier chip U1；
The first end of the 3rd resistor R3 is connect with the inverting input terminal of the first amplifier chip U1, the second end of 3rd resistor R3
It is connect with the output end of the first amplifier chip U1；
The output end of the first amplifier chip U1 is connect with the first end of the 4th resistance R4, the 4th resistance R4
Second end connect with the non-inverting input terminal of the second amplifier chip U2, the inverting input terminal of the second amplifier chip U2 warp
The 5th resistance R5 ground connection；The first end of the first capacitor C1 is connect with the second of the 4th resistance R4, and described first
The second end of capacitor C1 is grounded；The first end of the 6th resistance R6 and the inverting input terminal of the second amplifier chip U2 connect
It connects, the output end of the second amplifier chip U2 exports amplified induced voltage signal.
Further, the Hall sensor includes linear convergent rate module 109, and the linear convergent rate module 109 is to described
The induced voltage signal that amplification module 105 exports exports after being adjusted.In the present embodiment, linear convergent rate module 109 can be into
Row adjusts the slope of its linear convergent rate.Slope described here refer to linear convergent rate module 109 export induced voltage signal with
The ratio of effect and the magnetic field strength of Hall plate 103.
Wherein, the linear convergent rate module 109 includes bleeder circuit and linearity control circuit；The bleeder circuit receives sense
Voltage signal is answered, induced voltage signal is divided, the linearity control circuit carries out the induced voltage signal after partial pressure
It is exported after linear regulation.After the adjusting of linear block, the driving capability of induced voltage signal is increased, magnetic induction is increased
The output area of voltage signal.
Further, the Hall sensor further includes voltage regulator module 108,108 pairs of institutes of the voltage regulator module
It is exported after stating the induced voltage signal progress amplitude adjusting of the output of amplification module 105.Voltage regulator module 108 receives Hall plate
The induced voltage signals of 103 outputs, and optimization processings are filtered etc. to induced voltage signal, then in output to external connection
Equipment.
Further, the Hall sensor further includes protective module 110, the protective module 110 and the amplification mould
The protection end of block 105 is connect with the output end of the amplification module 105.In the present embodiment, the protective module 110 includes pressure stabilizing
Diode, the plus earth of the zener diode, the output end of the cathode of the zener diode and the amplification module 105
Connection.By the way that protective module 110 is arranged, the security reliability of Hall sensor is improved.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (9)
1. a kind of Hall sensor, which is characterized in that form differential pair including power module, electric current drive module, N number of Hall plate
And signal amplification module；Wherein N is even number, and N >=2；
The power module provides power supply for modules all into Hall sensor；
The electric current drive module, for providing constant driving current to the Hall plate；
The Hall plate, for generating the induced electricity mutually directly proportional to magnetic induction intensity when sensing perpendicular magnetic field
Signal is pressed, composition differential pair is for eliminating extraneous common mode interference；
The amplification module, the induced voltage signal for exporting to the Hall plate export after carrying out power amplification.
2. Hall sensor as described in claim 1, which is characterized in that the output end of the power module and the electric current drive
The input terminal of dynamic model block connects, and the output end of the electric current drive module and the driving end of multiple Hall plates are separately connected,
The output end of the Hall plate and the input terminal of the amplification module are separately connected；The output end of the amplification module exports
Amplified induced voltage signal.
3. Hall sensor as described in claim 1, which is characterized in that the Hall sensor further includes control module and answers
Position module；The first end of the reseting module is connect with the controlled end of the power module, the second end of the reseting module with
The control terminal of the control module connects；The control module is according to setting condition, by the reseting module to power module
It is resetted.
4. Hall sensor as described in claim 1, which is characterized in that the Hall sensor also temperature sensor, it is described
Temperature sensor is connect with the control module；
The temperature sensor, for detecting the operating temperature of Hall sensor；The control module is according to detecting the work
Make temperature and temperature-compensating is carried out to the induced voltage signal of output.
5. Hall sensor as described in claim 1, which is characterized in that the amplification module includes the first amplifier chip, the
Two amplifier chips, first capacitor, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance；
The first end of the first resistor is connect with the output end of the difference block, the second end of the first resistor with it is described
The non-inverting input terminal of first amplifier chip connects；The first end of the second resistance is connect with the output end of the difference block,
The second end of the second resistance is connect with the inverting input terminal of first amplifier chip；The first end of the 3rd resistor with
The inverting input terminal of first amplifier chip connects, and the output end of the second end of 3rd resistor and first amplifier chip connects
It connects；
The output end of first amplifier chip is connect with the first end of the 4th resistance, the second end of the 4th resistance with
The non-inverting input terminal of second amplifier chip connects, and the inverting input terminal of second amplifier chip connects through the 5th resistance
Ground；The first end of the first capacitor is connect with the second of the 4th resistance, the second end ground connection of the first capacitor；It is described
The first end of 6th resistance is connect with the inverting input terminal of second amplifier chip, and the output end of second amplifier chip is defeated
Amplified induced voltage signal out.
6. Hall sensor as described in claim 1, which is characterized in that the Hall sensor further includes that voltage adjusts mould
Block, the voltage regulator module export after carrying out amplitude adjusting to the induced voltage signal that the amplification module exports.
7. Hall sensor as claimed in claim 6, which is characterized in that the Hall sensor includes linear convergent rate module,
The linear convergent rate module includes bleeder circuit and linearity control circuit；The bleeder circuit receives induced voltage signal, to sense
Voltage signal is answered to be divided, the linearity control circuit exports after carrying out linear regulation to the induced voltage signal after partial pressure.
8. Hall sensor as claimed in any of claims 1 to 7 in one of claims, which is characterized in that the Hall sensor also wraps
Protective module is included, the protective module is connect with the protection end of the amplification module with the output end of the amplification module.
9. Hall sensor as claimed in claim 8, which is characterized in that the protective module includes zener diode, described
The plus earth of zener diode, the cathode of the zener diode are connect with the output end of the amplification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099994.1A CN109143122A (en) | 2018-09-20 | 2018-09-20 | Hall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099994.1A CN109143122A (en) | 2018-09-20 | 2018-09-20 | Hall sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109143122A true CN109143122A (en) | 2019-01-04 |
Family
ID=64815300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811099994.1A Pending CN109143122A (en) | 2018-09-20 | 2018-09-20 | Hall sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109143122A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111381200A (en) * | 2020-02-19 | 2020-07-07 | 南京理工大学 | Magnetic sensor for differential output by using 180-degree reverse phase modulation nonlinear magnetoelectric effect |
| CN111998872A (en) * | 2020-07-26 | 2020-11-27 | 哈尔滨理工大学 | Electrified coil magnetoelectric encoder and angle value temperature drift suppression method thereof |
| CN113049050A (en) * | 2019-12-10 | 2021-06-29 | 布莱克曼两合公司 | Flow meter with buffered power supply including electromagnetic sensor |
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| JPH11122056A (en) * | 1997-10-13 | 1999-04-30 | Iwao Sugizaki | Offset compensating circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049050A (en) * | 2019-12-10 | 2021-06-29 | 布莱克曼两合公司 | Flow meter with buffered power supply including electromagnetic sensor |
| CN111381200A (en) * | 2020-02-19 | 2020-07-07 | 南京理工大学 | Magnetic sensor for differential output by using 180-degree reverse phase modulation nonlinear magnetoelectric effect |
| CN111381200B (en) * | 2020-02-19 | 2022-08-16 | 南京理工大学 | Magnetic sensor for differential output by using 180-degree reverse phase modulation nonlinear magnetoelectric effect |
| CN111998872A (en) * | 2020-07-26 | 2020-11-27 | 哈尔滨理工大学 | Electrified coil magnetoelectric encoder and angle value temperature drift suppression method thereof |
| CN111998872B (en) * | 2020-07-26 | 2022-02-01 | 哈尔滨理工大学 | Electrified coil magnetoelectric encoder and angle value temperature drift suppression method thereof |
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Application publication date: 20190104 |
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| RJ01 | Rejection of invention patent application after publication |