CN107340488A - A kind of multiple spot multicarrier correction system and bearing calibration - Google Patents
A kind of multiple spot multicarrier correction system and bearing calibration Download PDFInfo
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- CN107340488A CN107340488A CN201710626801.2A CN201710626801A CN107340488A CN 107340488 A CN107340488 A CN 107340488A CN 201710626801 A CN201710626801 A CN 201710626801A CN 107340488 A CN107340488 A CN 107340488A
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- signal
- hall sensor
- excitation coil
- multicarrier
- correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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Abstract
The present invention relates to multicarrier to correct field,Specially a kind of multiple spot multicarrier correction system and bearing calibration,It can conveniently realize and the continuous time of Hall sensor is corrected,Improve sensing accuracy,It includes excitation coil,Hall sensor and signal processor,The pumping signal of Hall sensor excitation induced coil,It is characterized in that,Excitation coil is N number of with Hall sensor quantity,N is the integer more than or equal to 2,Excitation coil corresponds with Hall sensor,The output end of all Hall sensors each connects an input of analogue amplifier,The output end connection signal processor of analogue amplifier,Signal processor exports detection signal and correction signal,Correction signal is delivered to corresponding Hall sensor and is corrected,Detection signal is final output signal,Pumping signal caused by each excitation coil is signal of the direct current signal of master output after square-wave frequency modulation,And frequency is different.
Description
Technical field
The present invention relates to multicarrier to correct field, specially a kind of multiple spot multicarrier correction system and bearing calibration.
Background technology
Hall effect defines the relation between magnetic field and induced voltage, when electric current passes through a conductor being located in magnetic field
When, magnetic field can in conductor electronics produce an active force on electron motion direction, so as to perpendicular to
Electrical potential difference is produced in the both direction of conductor and magnetic induction line.It is defeated to be changed into electric signal by detecting changes of magnetic field for Hall sensor
Go out, available for the current strength in detection nearby conductor.
Due to that can not be differentiated in external environment magnetic field and particular conductor caused by electric current based on magnetic field detection current sensor
Magnetic field, it typically can simultaneously be detected using multiple Hall sensors, environmental magnetic field then be suppressed by special algorithm, so as to obtain
Magnetic field intensity caused by accurate electric current.Simultaneously as the precision of Hall sensor is easily by external environment, such as：Temperature
Degree, encapsulation stress etc. influence, and continuous time correction is carried out to hall device turns into the optimal of raising current sensor sensing accuracy
Scheme.
Traditional Hall sensor continuous time correcting structure, can be with as shown in figure 1, wherein 100 be built-in chip type coil
For the magnetic field of master output occurs；101 magnetic fields to be measured triggered by foreign current；102nd, 103 be that two physical dimensions are complete
Complete the same Hall sensor；104 and 105 be two duplicate analog signal amplifiers of multiplication factor；106 be at signal
Manage device, can work in an analog fashion or in a digital manner, its function be measurement 100 caused by master output magnetic field be
102 analog signals sensed, and be compared and handle with the standard signal being previously stored.So as to obtain correction signal；So
It is corrected afterwards to 103, so as to obtain the current sensor of degree of precision.Simultaneously as parallel path is used, with colonel
Correction method can be carried out simultaneously with the detection to magnetic field to be measured, i.e.,：It can ensure that continuous time corrects.
It can prove, the premise that above correcting mode can effectively be implemented is：
102nd, 103 be two duplicate Hall sensors, and identical induced signal is had to same magnetic field excitation
Output；
Outside environmental elements, such as：Temperature, humidity and encapsulation stress are completely the same for 102,103 influence；
104th, difference is not present in 105 multiplication factor；
But in fact, in current sensor, it usually needs two or more Hall sensors are triggered to energized conductor
Magnetic field measure, so as to be suppressed with algorithm to environmental magnetic field.In this case, due between Hall sensor
Away from larger, the premise of above conventional correction mode will no longer be set up.
The content of the invention
The problem of continuous time corrects, sensing accuracy is low can not be realized for above-mentioned, the invention provides a kind of multiple spot is more
Carrier correction system and bearing calibration, it can conveniently realize and the continuous time of Hall sensor is corrected, and improve sensing accuracy.
Its technical scheme is such：A kind of multiple spot multicarrier corrects system, it include excitation coil, Hall sensor and
Signal processor, the Hall sensor sense the pumping signal of the excitation coil, it is characterised in that the excitation coil with
The Hall sensor quantity is N number of, and N is the integer more than or equal to 2, the excitation coil and the Hall sensor one
One correspondence, the output end of all Hall sensors each connect an input of analogue amplifier, and the simulation is put
The output end connection signal processor of big device, the signal processor output detection signal and correction signal, the correction signal
The Hall sensor corresponding to delivering to is corrected, and the detection signal is final output signal, each excitation coil
Caused pumping signal is signal of the direct current signal of master output after square-wave frequency modulation, and frequency is different, Mei Gesuo
The response of internal motivation signal and magnetic responsiveness to be measured for stating Hall sensor are all distributed in different frequency ranges.
It is further characterized by, and the analogue amplifier includes plus/minus musical instruments used in a Buddhist or Taoist mass and amplifier；
The signal processor includes N number of demodulator, N+1 wave filter and signal-corecting module, each Hall sensor
A demodulator and the wave filter are corresponded to respectively.
A kind of multiple spot multicarrier bearing calibration, it is characterised in that it comprises the following steps：
（1）N number of Hall sensor is corresponded into N number of excitation coil, and is respectively induced pumping signal, N is whole more than or equal to 2
Number, pumping signal caused by each excitation coil are signal of the direct current signal after square-wave frequency modulation of master output, and frequency
Different, the internal motivation signal response of each Hall sensor and magnetic responsiveness to be measured are distributed in different frequency ranges；
（2）By step（1）In all pumping signals for sensing deliver to calculation process in analogue amplifier and be amplified signal；
（3）By step（2）Middle amplified signal delivers to signal processor and is handled to obtain detection signal and correction signal, correction letter
Hall sensor corresponding to number delivering to is corrected, and detection signal is final output signal.
It is further characterized by, step（2）Calculation process in middle analogue amplifier includes passing through all pumping signals
Amplify after crossing adder processing or amplify all pumping signals after subtracter is handled；
Step（3）Middle signal processor is to step（2）In amplified signal in pumping signal be demodulated after pass through wave filter
Correction signal is obtained with signal-corecting module, wave filter and signal transacting are directly over to the magnetic responsiveness to be measured in amplified signal
Module obtains detection signal.
After the correction system of the present invention and bearing calibration, the internal motivation signal of each Hall sensor is responded
All it is distributed in magnetic responsiveness to be measured in different frequency ranges, makes it possible continuous monitoring Hall sensor state, using one
Analogue amplifier amplifies all response of pattern field signal and the response of outside measured signal, eliminates different amplifier times magnifications
Error caused by number difference, improves sensing accuracy, while also greatly reduce circuit complexity and area.
Brief description of the drawings
Fig. 1 is prior art theory diagram；
Fig. 2 is principle of the invention block diagram；
Fig. 3 is frequency distribution schematic diagram；
Fig. 4 is theory diagram inside signal processor.
Embodiment
Illustrate in detail below：
As shown in Fig. 2 to Fig. 4, a kind of multiple spot multicarrier corrects system, it include three excitation coils 201,202,203, three
Hall sensor 204,205,206 and a signal processor 210, Hall sensor 204,205,206 are respectively induced excitation line
The pumping signal of circle 201,202,203, excitation coil 204,205,206 correspond with Hall sensor 201,202,203, suddenly
The output end of your sensor 204,205,206 each connects an input of analogue amplifier 207, analogue amplifier 207
Output end connects signal processor 210, and signal processor 210 exports detection signal 211 and correction signal, correction signal are sent respectively
It is corrected to corresponding Hall sensor, detection signal 211 is final output signal, excitation letter caused by each excitation coil
Number for master output signal of the direct current signal after square-wave frequency modulation, and frequency is different, each Hall sensor it is interior
Portion's pumping signal response and magnetic responsiveness to be measured are all distributed in different frequency ranges.Analogue amplifier includes adder and amplifier
Combination either subtracter and amplifier combination, can select according to the actual requirements.Signal processor 210 includes three solutions
Device, four wave filters and signal-corecting module are adjusted, each Hall sensor corresponds to a demodulator and wave filter respectively.Excitation line
Frequency corresponding to circle 201 is f1, frequency corresponding to excitation coil 202 is f2, the respective frequencies of excitation coil 203 are fN, these frequencies
It is different, following scheme can be selected：f2=2*f1, fN=N*f1, by that analogy, with reference to figure 3, so each hall device
Internal motivation signal response be all distributed in different frequency ranges.Similarly, sound of each hall device for magnetic field to be measured
Low frequency should be then distributed in（Other frequencies can also be modulated to the method for modulation）.Above signal is mutually isolated in frequency domain,
So it can be handled by same analogue amplifier 207
A kind of multiple spot multicarrier bearing calibration, it comprises the following steps：
（1）N number of Hall sensor is corresponded into N number of excitation coil, and is respectively induced pumping signal, N is whole more than or equal to 2
Number, pumping signal caused by each excitation coil are signal of the direct current signal after square-wave frequency modulation of master output, and frequency
Different, the internal motivation signal response of each Hall sensor and magnetic responsiveness to be measured are distributed in different frequency ranges；
（2）By step（1）In all pumping signals for sensing deliver to calculation process in analogue amplifier and be amplified signal；
（3）By step（2）Middle amplified signal delivers to signal processor and is handled to obtain detection signal and correction signal, correction letter
Hall sensor corresponding to number delivering to is corrected, and detection signal is final output signal.
Step（2）Calculation process in middle analogue amplifier includes amplifying all pumping signals after adder is handled
Or all pumping signals are amplified after subtracter is handled；
Step（3）Middle signal processor is to step（2）In amplified signal in pumping signal be demodulated after pass through wave filter
Correction signal is obtained with signal-corecting module, wave filter and signal-corecting module are directly over to the direct current signal in amplified signal
Obtain detection signal.
The built-in function block diagram of signal processor 210 is as shown in figure 4, inside can be analog form or numeral
Mode, the present embodiment are analog form.The signal treated by analogue amplifier 207 passes through a series of demodulators, respectively by f1 ~
FN is demodulated into the pumping signal response of response（Corresponding to excitation coil 201,202,203）, by exciter response signal with depositing
The pattern field signal response of storage is compared, and so as to provide the error on current time each Hall sensor path, passes through
Correcting algorithm produces correction signal, and excitation coil 201,202,203 is corrected respectively.And magnetic responsiveness to be measured is then by letter
Single LPF, which is separated, directly exports detection signal 211.
Claims (6)
1. a kind of multiple spot multicarrier correction system and correction system, it includes excitation coil, Hall sensor and signal processor,
The Hall sensor senses the pumping signal of the excitation coil, it is characterised in that the excitation coil passes with the Hall
Sensor quantity is N number of, and N is the integer more than or equal to 2, and the excitation coil corresponds with the Hall sensor, institute
The output end for the Hall sensor having each connects an input of analogue amplifier, the output of the analogue amplifier
End connection signal processor, the signal processor output detection signal and correction signal, the correction signal are delivered to corresponding
The Hall sensor is corrected, and the detection signal is final output signal, is encouraged caused by each excitation coil
Signal is signal of the direct current signal of master output after square-wave frequency modulation, and frequency is different, each hall sensing
The internal motivation signal response of device and magnetic responsiveness to be measured are all distributed in different frequency ranges.
2. a kind of multiple spot multicarrier correction system according to claim 1, it is characterised in that the analogue amplifier includes
Plus/minus musical instruments used in a Buddhist or Taoist mass and amplifier.
3. a kind of multiple spot multicarrier correction system according to claim 1, it is characterised in that the signal processor includes
N number of demodulator, N+1 wave filter and signal-corecting module, each Hall sensor correspond to a demodulator respectively
With the wave filter.
4. a kind of multiple spot multicarrier bearing calibration, it is characterised in that it comprises the following steps：
（1）N number of Hall sensor is corresponded into N number of excitation coil, and is respectively induced pumping signal, N is whole more than or equal to 2
Number, pumping signal caused by each excitation coil are signal of the direct current signal after square-wave frequency modulation of master output, and frequency
Different, the internal motivation signal response of each Hall sensor and magnetic responsiveness to be measured are distributed in different frequency ranges；
（2）By step（1）In all pumping signals for sensing deliver to calculation process in analogue amplifier and be amplified signal；
（3）By step（2）Middle amplified signal delivers to signal processor and is handled to obtain detection signal and correction signal, correction letter
Hall sensor corresponding to number delivering to is corrected, and detection signal is final output signal.
A kind of 5. multiple spot multicarrier bearing calibration according to claim 4, it is characterised in that step（2）Middle Simulation scale-up
Calculation process in device includes after adder is handled amplifying all pumping signals or by all pumping signals through over-subtraction
Amplify after musical instruments used in a Buddhist or Taoist mass processing.
A kind of 6. multiple spot multicarrier bearing calibration according to claim 4, it is characterised in that step（3）Middle signal transacting
Device is to step（2）In amplified signal in pumping signal be demodulated after corrected by wave filter and signal-corecting module
Signal, wave filter is directly over to the magnetic responsiveness to be measured in amplified signal and signal processing module obtains detection signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710626801.2A CN107340488B (en) | 2017-07-28 | 2017-07-28 | Multi-point multi-carrier correction system and correction method |
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| CN201710626801.2A CN107340488B (en) | 2017-07-28 | 2017-07-28 | Multi-point multi-carrier correction system and correction method |
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| CN107340488A true CN107340488A (en) | 2017-11-10 |
| CN107340488B CN107340488B (en) | 2023-09-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058314A (en) * | 2019-05-28 | 2019-07-26 | 中国科学院微电子研究所 | Signal supervisory instrument and system |
| WO2019199983A1 (en) | 2018-04-13 | 2019-10-17 | Texas Instruments Incorporated | Calibration of hall device sensitivity using auxiliary hall device |
| CN112985246A (en) * | 2021-01-25 | 2021-06-18 | 成都芯源系统有限公司 | Position sensing system and position sensing method |
| CN112986889A (en) * | 2020-12-08 | 2021-06-18 | 浙江武义电气安装工程有限公司 | System and method for checking current transformer for distribution network |
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| CN1705862A (en) * | 2002-10-16 | 2005-12-07 | Tt电子科技有限公司 | Sensing apparatus and method |
| CN101023367A (en) * | 2004-09-16 | 2007-08-22 | 机电联合股份有限公司 | Continuously calibrated magnetic field sensor |
| CN102445671A (en) * | 2010-10-13 | 2012-05-09 | 北京中科信电子装备有限公司 | Hall device error compensation circuit |
| CN106768282A (en) * | 2017-03-14 | 2017-05-31 | 匙庆磊 | A kind of field calibration system for magnetoelectric sensor |
| CN207037057U (en) * | 2017-07-28 | 2018-02-23 | 无锡思泰迪半导体有限公司 | A kind of multiple spot multicarrier corrects system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1705862A (en) * | 2002-10-16 | 2005-12-07 | Tt电子科技有限公司 | Sensing apparatus and method |
| CN101023367A (en) * | 2004-09-16 | 2007-08-22 | 机电联合股份有限公司 | Continuously calibrated magnetic field sensor |
| CN102445671A (en) * | 2010-10-13 | 2012-05-09 | 北京中科信电子装备有限公司 | Hall device error compensation circuit |
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| CN207037057U (en) * | 2017-07-28 | 2018-02-23 | 无锡思泰迪半导体有限公司 | A kind of multiple spot multicarrier corrects system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019199983A1 (en) | 2018-04-13 | 2019-10-17 | Texas Instruments Incorporated | Calibration of hall device sensitivity using auxiliary hall device |
| EP3775940A4 (en) * | 2018-04-13 | 2021-06-23 | Texas Instruments Incorporated | Calibration of hall device sensitivity using auxiliary hall device |
| CN110058314A (en) * | 2019-05-28 | 2019-07-26 | 中国科学院微电子研究所 | Signal supervisory instrument and system |
| CN112986889A (en) * | 2020-12-08 | 2021-06-18 | 浙江武义电气安装工程有限公司 | System and method for checking current transformer for distribution network |
| CN112985246A (en) * | 2021-01-25 | 2021-06-18 | 成都芯源系统有限公司 | Position sensing system and position sensing method |
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| CN107340488B (en) | 2023-09-19 |
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Effective date of registration: 20221215 Address after: No. 295, Building 17, No. 2723, Fuchunwan Avenue, Chunjiang Street, Fuyang District, Hangzhou, Zhejiang, 310000 Applicant after: Hangzhou Sitai Microelectronics Co.,Ltd. Address before: 214028 No.16 Changjiang Road, Xinwu District, Wuxi City, Jiangsu Province Applicant before: STEADICHIPS Inc. |
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