CN110045168A - A kind of current sensor apparatus and measurement method based on TMR tunnel magnetoresistance device - Google Patents
A kind of current sensor apparatus and measurement method based on TMR tunnel magnetoresistance device Download PDFInfo
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- CN110045168A CN110045168A CN201910289452.9A CN201910289452A CN110045168A CN 110045168 A CN110045168 A CN 110045168A CN 201910289452 A CN201910289452 A CN 201910289452A CN 110045168 A CN110045168 A CN 110045168A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/205—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using magneto-resistance devices, e.g. field plates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/32—Compensating for temperature change
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Abstract
The invention discloses a kind of current sensor apparatus and measurement method based on TMR tunnel magnetoresistance device, described device includes current carrying conductor, TMR sensor, signal conditioning unit, temperature sensor；The current carrying conductor with tested electric current port for being attached, to access tested electric current；The TMR sensor is used to incude the current carrying conductor magnetic signal by TMR tunnel magnetoresistance element, converts electric signal for the magnetic signal；The electric signal that the signal conditioning unit is used to export the TMR sensor carries out Signal Pretreatment by preset rules；The temperature sensor is used to measure the operating temperature of the TMR sensor；Described control unit converts corresponding current signal by preset rules for the electric signal for receiving the pretreated electric signal of the signal conditioning unit；Described control unit compensates the current signal according to the operating temperature and preset compensation model；Current signal described in final output.
Description
Technical field
The present invention relates to sensor technical fields, pass more particularly, to a kind of electric current based on TMR tunnel magnetoresistance device
Sensor arrangement and measurement method.
Background technique
Magnetic Sensor, which is widely used in modern industry and electronic product, measures electric current, position, side with induced magnetic field intensity
To etc. physical parameters.In the prior art, it is used to measure magnetic field and other parameters there are many different types of sensor, such as adopts
With Hall (Hall) element, anisotropic magnetoresistance (Anisotropic Magnetoresistance, AMR) element or huge magnetic
Resistance (Giant Magnetoresistance, GMR) element is the Magnetic Sensor of sensing element.
The Hall current sensor being used widely is divided into open loop type Hall current sensor, and (direct amplifier system Hall current passes
Sensor) and closed loop Hall current sensor (Zero flux Hall current sensor).Open loop type Hall current sensor by magnetic core,
Hall element and amplifying circuit are constituted.Magnetic core has an opening air gap, and Hall element is placed at air gap.When primary side conductor flows through electricity
When stream, the magnetic field strength magnetic field directly proportional to size of current is generated around conductor, magnetic core gathers the magnetic line of force to air gap, suddenly
Your element exports the voltage signal directly proportional to magnetic induction intensity at air gap, and amplifying circuit, which amplifies the signal, to be exported.Closed loop
Hall current sensor includes magnetic core, Hall element, amplifying circuit and secondary side compensative winding.Amplifying circuit receives Hall element
Output, and be enlarged into current signal and be supplied to secondary side compensative winding, the magnetic field and primary side that secondary side compensative winding generates in magnetic core
The magnetic field that electric current generates is equal in magnitude at air gap, contrary, offsets primary side magnetic field, forms negative feedback closed loop control circuit.
It macroscopically says, Zero flux will be maintained at air gap always, keep magnetic balance.
It is Hall sensor either open loop type or closed loop, in order to improve the measurement accuracy of sensor, reduce outer
Portion's magnetic interference is typically necessary using magnetic core and assembles at the magnetic line of force to air gap.Due to having used magnetic core, so that using Hall
The current sensor volume of device is larger, heavy.And for closed loop Hall sensor, due to increase secondary side compensation around
The power dissipation ratio open loop type Hall sensor of group, sensor is much bigger.
Summary of the invention
Refer to that larger and power consumption is higher to solve the existing magnet sensor arrangement for measurement existing for background technique
Problem, the present invention provides a kind of current sensor apparatus and measurement method based on TMR tunnel magnetoresistance device, the electric current biography
Sensor arrangement and measurement method incude electric current to be measured by TMR sensor, and according to the temperature of temperature sensor measurement
Measurement result is calibrated；A kind of current sensor apparatus based on TMR tunnel magnetoresistance device includes:
Current carrying conductor, the current carrying conductor with tested electric current port for being attached, to access tested electric current；The load
Conductance line is fixed on the TMR sensor on the position of pre-determined distance；
TMR sensor, the TMR sensor are used to incude the current carrying conductor magnetic signal by TMR tunnel magnetoresistance element,
Electric signal is converted by the magnetic signal, and by the electric signal transmission to signal conditioning unit；The electric signal includes voltage
Signal and resistance signal；
Signal conditioning unit, the electric signal that the signal conditioning unit is used to export the TMR sensor is by default rule
Signal Pretreatment is then carried out, and the pretreated electric signal is sent to control unit；
Temperature sensor, the temperature sensor are used to measure the operating temperature of the TMR sensor, and by the work
Temperature is sent to described control unit in real time；
Control unit, described control unit is for receiving the pretreated electric signal of the signal conditioning unit, and by institute
It states electric signal and is converted into corresponding current signal by preset rules；Described control unit is according to the operating temperature and presets
Compensation model the current signal is compensated；Current signal described in final output；It is described compensation include temperature-compensating with
And linear compensation.
Further, the compensation model is according to the multiple groups temperature compensation data and mission nonlinear offset data of history
Carry out the foundation of model in advance by machine learning algorithm.
Further, described device further includes standard time clock unit, and the standard time clock unit is used for single to the control
First, the described temperature sensor and TMR sensor provide standard time clock；
The operating temperature and TMR sensing that described control unit transmits temperature sensor according to the standard time clock
The electric signal of device transmission is matched one by one.
Further, described device further includes power supply unit；
The power supply unit is used to be powered the signal conditioning unit, temperature sensor and control unit, and
Adjustable excitation power supply is provided to the TMR sensor.
Further, the pre-determined distance between the current carrying conductor and the TMR sensor is adjustable, according to described to be measured
The target range of electric current is adjusted to correspondence markings position.
Further, described control unit is used to obtain by inquiring preset electric signal and current signal translation lists
The current signal of the corresponding electric signal.
Further, described control unit includes output interface, and the output interface includes IIC interface and SPI interface,
The output interface is used to export the current signal of the measurement.
A kind of current sensor measurement method based on TMR tunnel magnetoresistance device includes:
Current carrying conductor and tested electric current port are attached, tested electric current is accessed；
TMR sensor by the way that the current carrying conductor fixed range is arranged in incudes the magnetic signal of the current carrying conductor, and
Electric signal is converted by the magnetic signal；
Signal Pretreatment carried out to the electric signal, and will treated that electric signal is converted by preset rules is corresponding
Current signal；
By the operating temperature of TMR sensor described in temperature sensor measurement, according to the operating temperature and preset
Compensation model compensates the current signal；The compensation includes temperature-compensating and linear compensation；
Export compensated current signal.
Further, the compensation model is according to the multiple groups temperature compensation data and mission nonlinear offset data of history
Carry out the foundation of model in advance by machine learning algorithm.
Further, standard time clock is provided to the temperature sensor and the TMR sensor；
Before compensating, temperature sensor is transmitted according to the standard time clock operating temperature and TMR biography
The electric signal of sensor transmission is matched one by one.
Further, the pre-determined distance between the current carrying conductor and the TMR sensor is adjustable, according to described to be measured
The target range of electric current is adjusted to correspondence markings position.
It is further, described by preset rules to convert corresponding current signal for treated electric signal, comprising:
By inquiring preset electric signal and current signal translation lists, the current signal of the corresponding electric signal is obtained.
The invention has the benefit that technical solution of the present invention, gives a kind of electricity based on TMR tunnel magnetoresistance device
Flow sensor arrangement and measurement method；The current sensor apparatus and measurement method realize electric current to be measured by TMR sensor
Induction and measurement, 1. incude tested current fields, high sensitivity using TMR tunnel magnetoresistance devices, and device uses difference output
Signal, strong antijamming capability insensitive to common mode interference signal；The current sensor apparatus and measurement method are without magnetic
Core and secondary side compensative winding solve the problems, such as that the existing magnet sensor arrangement for measurement refers to that larger and power consumption is higher；Institute
Current sensor apparatus and measurement method are stated by the monitoring to TMR sensor operating temperature, automatically to initial measurement number
According to progress temperature-compensating and linear compensation；Temperature drift performance is greatly improved, it can be ensured that surveys in extremely cold, hot area electric current
The accuracy of amount.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is a kind of knot of current sensor apparatus based on TMR tunnel magnetoresistance device of the specific embodiment of the invention
Composition；
Fig. 2 is a kind of current sensor measurement method based on TMR tunnel magnetoresistance device of the specific embodiment of the invention
Flow chart.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is a kind of knot of current sensor apparatus based on TMR tunnel magnetoresistance device of the specific embodiment of the invention
Composition；As shown in Figure 1, the current sensor apparatus includes:
Current carrying conductor 110, the current carrying conductor 110 with tested electric current port for being attached, to access tested electric current；
The current carrying conductor 110 is fixed on the TMR sensor on the position of pre-determined distance；
In the present embodiment, the current carrying conductor 110 is accessed in the tested corresponding circuit of electric current with predetermined manner, makes the quilt
It surveys electric current and flows into the current carrying conductor 110；The position of the current carrying conductor 110 and the TMR sensor is relatively fixed, i.e., described
Current carrying conductor 110 can be fixed, and the both ends of the current carrying conductor 110 are respectively equipped with the end being connected with tested electric current port
Mouthful；Further, the pre-determined distance between the current carrying conductor 110 and the TMR sensor is adjustable, according to the electricity to be measured
The target range of stream is adjusted to correspondence markings position.
TMR sensor 120, the TMR sensor 120 are used to incude the current carrying conductor by TMR tunnel magnetoresistance element
The magnetic signal is converted electric signal by 110 magnetic signals, and by the electric signal transmission to signal conditioning unit；The telecommunications
Number include voltage signal and resistance signal；
The present embodiment is used as current sense measuring device using TMR sensor 120, is incuded using TMR tunnel magnetoresistance device
Tested current field, high sensitivity, device use differential output signal, strong antijamming capability insensitive to common mode interference signal；
Signal conditioning unit 130, the signal conditioning unit 130 are used for the electric signal exported to the TMR sensor 120
Signal Pretreatment is carried out by preset rules, and the pretreated electric signal is sent to control unit；
The pretreated mode includes filtering and noise reduction；The pretreated electric signal meets the defeated of control unit
Enter requirement；
Temperature sensor 140, the temperature sensor 140 are used to measure the operating temperature of the TMR sensor 120, and
The operating temperature is sent to described control unit in real time；
Control unit 150, described control unit 150 is for receiving the pretreated telecommunications of the signal conditioning unit 130
Number, and corresponding current signal is converted by preset rules by the electric signal；Described control unit 150 is according to the work
Temperature and preset compensation model compensate the current signal；Current signal described in final output；The compensation packet
Include temperature-compensating and linear compensation.
Further, the compensation model is according to the multiple groups temperature compensation data and mission nonlinear offset data of history
Carry out the foundation of model in advance by machine learning algorithm.
Further, described device further includes standard time clock unit, and the standard time clock unit is used for single to the control
Member 150, the temperature sensor 140 and TMR sensor 120 provide standard time clock；
Operating temperature that described control unit 150 transmits temperature sensor 140 according to the standard time clock and described
The electric signal that TMR sensor 120 transmits is matched one by one.
Further, described device further includes power supply unit；
The power supply unit be used for the signal conditioning unit 130, temperature sensor 140 and control unit 150 into
Row power supply, and adjustable excitation power supply is provided to the TMR sensor 120.
Further, described control unit 150 is used to obtain by inquiring preset electric signal and current signal translation lists
The current signal of the electric signal must be corresponded to.
Further, described control unit 150 includes output interface, and the output interface includes that IIC interface and SPI connect
Mouthful, the output interface is used to export the current signal of the measurement.
Fig. 2 is a kind of current sensor measurement method based on TMR tunnel magnetoresistance device of the specific embodiment of the invention
Flow chart.As shown in Figure 2, which comprises
Step 210, current carrying conductor and tested electric current port are attached, access tested electric current；
Step 220, the magnetic of the current carrying conductor is incuded by the way that the TMR sensor of the current carrying conductor fixed range is arranged in
Signal, and electric signal is converted by the magnetic signal；
Further, the pre-determined distance between the current carrying conductor and the TMR sensor is adjustable, according to described to be measured
The target range of electric current is adjusted to correspondence markings position.
Step 230, Signal Pretreatment is carried out to the electric signal, and electric signal passes through preset rules conversion by treated
For corresponding current signal；
It is further, described by preset rules to convert corresponding current signal for treated electric signal, comprising:
By inquiring preset electric signal and current signal translation lists, the current signal of the corresponding electric signal is obtained.
Step 240, by the operating temperature of TMR sensor described in temperature sensor measurement, according to the operating temperature with
And preset compensation model compensates the current signal；The compensation includes temperature-compensating and linear compensation；
Further, the compensation model is according to the multiple groups temperature compensation data and mission nonlinear offset data of history
Carry out the foundation of model in advance by machine learning algorithm.
Further, standard time clock is provided to the temperature sensor and the TMR sensor；
Before compensating, temperature sensor is transmitted according to the standard time clock operating temperature and TMR biography
The electric signal of sensor transmission is matched one by one.
Step 250, compensated current signal is exported.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the disclosure
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.The step of being related in this specification, which numbers, is only used for distinguishing each step, and the time being not limited between each step
Or the relationship of logic, restriction unless the context clearly, otherwise the relationship between each step includes the case where various possible.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments means to be in the disclosure
Within the scope of and form different embodiments.For example, embodiment claimed in detail in the claims is one of any
Can in any combination mode come using.
The various component embodiments of the disclosure can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.The disclosure is also implemented as executing side as described herein
The some or all equipment or system program (for example, computer program and computer program product) of method.It is such
It realizes that the program of the disclosure can store on a computer-readable medium, or can have the shape of one or more signal
Formula.Such signal can be downloaded from an internet website to obtain, and perhaps be provided on the carrier signal or with any other shape
Formula provides.
The disclosure is limited it should be noted that above-described embodiment illustrates rather than the disclosure, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.Word "comprising" is not arranged
Except there are element or steps not listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of more
A such element.The disclosure can be by means of including the hardware of several different elements and by means of properly programmed calculating
Machine is realized.If several in these systems can be by same in the unit claim for listing dry systems
Hardware branch embodies.
The above is only the specific embodiment of the disclosure, it is noted that for the ordinary skill people of this field
Member for, do not depart from the disclosure spirit under the premise of, can make several improvements, modify and deform, these improve, modification,
It is regarded as falling within the scope of protection of this application with deformation.
Claims (12)
1. a kind of current sensor apparatus based on TMR tunnel magnetoresistance device, described device include:
Current carrying conductor, the current carrying conductor with tested electric current port for being attached, to access tested electric current；The current-carrying is led
Line is fixed on the TMR sensor on the position of pre-determined distance；
TMR sensor, the TMR sensor is used to incude the current carrying conductor magnetic signal by TMR tunnel magnetoresistance element, by institute
It states magnetic signal and is converted into electric signal, and by the electric signal transmission to signal conditioning unit；The electric signal includes voltage signal
And resistance signal；
Signal conditioning unit, the electric signal that the signal conditioning unit is used to export the TMR sensor press preset rules into
Row Signal Pretreatment, and the pretreated electric signal is sent to control unit；
Temperature sensor, the temperature sensor are used to measure the operating temperature of the TMR sensor, and by the operating temperature
It is sent to described control unit in real time；
Control unit, described control unit is for receiving the pretreated electric signal of the signal conditioning unit, and by the electricity
Signal is converted into corresponding current signal by preset rules；Described control unit is according to the operating temperature and preset benefit
Model is repaid to compensate the current signal；Current signal described in final output；The compensation includes temperature-compensating and line
Property compensation.
2. the apparatus according to claim 1, it is characterised in that: the compensation model is according to the multiple groups temperature-compensating number of history
Accordingly and mission nonlinear offset data passes through the foundation that machine learning algorithm carries out model in advance.
3. the apparatus according to claim 1, it is characterised in that: described device further includes standard time clock unit, the standard
Clock unit is used to provide standard time clock to described control unit, the temperature sensor and TMR sensor；
The operating temperature and TMR sensor biography that described control unit transmits temperature sensor according to the standard time clock
The electric signal sent is matched one by one.
4. the apparatus according to claim 1, it is characterised in that: described device further includes power supply unit；
The power supply unit is for being powered the signal conditioning unit, temperature sensor and control unit, and to institute
It states TMR sensor and adjustable excitation power supply is provided.
5. the apparatus according to claim 1, it is characterised in that: default between the current carrying conductor and the TMR sensor
Distance be it is adjustable, correspondence markings position is adjusted to according to the target range of the electric current to be measured.
6. the apparatus according to claim 1, it is characterised in that: described control unit is used for by inquiring preset electric signal
With current signal translation lists, the current signal of the corresponding electric signal is obtained.
7. the apparatus according to claim 1, it is characterised in that: described control unit includes output interface, and the output connects
Mouth includes IIC interface and SPI interface, and the output interface is used to export the current signal of the measurement.
8. a kind of current sensor measurement method based on TMR tunnel magnetoresistance device, which comprises
Current carrying conductor and tested electric current port are attached, tested electric current is accessed；
TMR sensor by the way that the current carrying conductor fixed range is arranged in incudes the magnetic signal of the current carrying conductor, and by institute
It states magnetic signal and is converted into electric signal；
Signal Pretreatment carried out to the electric signal, and by preset rules converts corresponding electric current for treated electric signal
Signal；
By the operating temperature of TMR sensor described in temperature sensor measurement, according to the operating temperature and preset compensation
Model compensates the current signal；The compensation includes temperature-compensating and linear compensation；
Export compensated current signal.
9. according to the method described in claim 8, it is characterized by: the compensation model is according to the multiple groups temperature-compensating number of history
Accordingly and mission nonlinear offset data passes through the foundation that machine learning algorithm carries out model in advance.
10. according to the method described in claim 8, it is characterized by: being mentioned to the temperature sensor and the TMR sensor
For standard time clock；
The operating temperature that temperature sensor is transmitted according to the standard time clock before compensating and the TMR sensor
The electric signal of transmission is matched one by one.
11. according to the method described in claim 8, it is characterized by: default between the current carrying conductor and the TMR sensor
Distance be it is adjustable, correspondence markings position is adjusted to according to the target range of the electric current to be measured.
12. according to the method described in claim 8, it is characterized in that, described pass through preset rules for treated electric signal and turn
Turn to corresponding current signal, comprising:
By inquiring preset electric signal and current signal translation lists, the current signal of the corresponding electric signal is obtained.
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Cited By (12)
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|---|---|---|---|---|
| CN110412339A (en) * | 2019-08-08 | 2019-11-05 | 南方电网科学研究院有限责任公司 | A kind of electric system current measuring device and method |
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| CN111323639A (en) * | 2020-03-27 | 2020-06-23 | 江苏多维科技有限公司 | Current measuring device and method based on magnetic probe |
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| CN113341195B (en) * | 2021-04-12 | 2023-06-23 | 国网宁夏电力有限公司吴忠供电公司 | Current measurement method, measurement device and equipment based on tunnel magneto-resistive element |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419393A (en) * | 2011-12-30 | 2012-04-18 | 江苏多维科技有限公司 | Current sensor |
| CN103217570A (en) * | 2013-03-21 | 2013-07-24 | 无锡凌湖科技有限公司 | Tunneling magneto resistive (TMR) self-temperature-compensation digital current sensor |
| CN104964703A (en) * | 2014-02-24 | 2015-10-07 | 英飞凌科技股份有限公司 | Highly efficient diagnostic methods for monolithic sensor systems |
| CN105021864A (en) * | 2014-04-25 | 2015-11-04 | 英飞凌科技股份有限公司 | Magnetic field current sensors, sensor systems and methods |
| CN106249021A (en) * | 2015-06-08 | 2016-12-21 | 英飞凌科技股份有限公司 | There is the current sensor chip of magnetic field sensor |
| JP2017096627A (en) * | 2014-03-28 | 2017-06-01 | コニカミノルタ株式会社 | Magnetic sensor |
| US20180172779A1 (en) * | 2016-12-16 | 2018-06-21 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method for Offset Compensation of a Sensor Signal of a Hall Sensor and Sensor Arrangement |
-
2019
- 2019-04-11 CN CN201910289452.9A patent/CN110045168A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419393A (en) * | 2011-12-30 | 2012-04-18 | 江苏多维科技有限公司 | Current sensor |
| CN103217570A (en) * | 2013-03-21 | 2013-07-24 | 无锡凌湖科技有限公司 | Tunneling magneto resistive (TMR) self-temperature-compensation digital current sensor |
| CN104964703A (en) * | 2014-02-24 | 2015-10-07 | 英飞凌科技股份有限公司 | Highly efficient diagnostic methods for monolithic sensor systems |
| JP2017096627A (en) * | 2014-03-28 | 2017-06-01 | コニカミノルタ株式会社 | Magnetic sensor |
| CN105021864A (en) * | 2014-04-25 | 2015-11-04 | 英飞凌科技股份有限公司 | Magnetic field current sensors, sensor systems and methods |
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