CN105717325A - Magnetic azimuth sensor used for wind direction measurement - Google Patents
Magnetic azimuth sensor used for wind direction measurement Download PDFInfo
- Publication number
- CN105717325A CN105717325A CN201610234680.2A CN201610234680A CN105717325A CN 105717325 A CN105717325 A CN 105717325A CN 201610234680 A CN201610234680 A CN 201610234680A CN 105717325 A CN105717325 A CN 105717325A
- Authority
- CN
- China
- Prior art keywords
- axis
- magnetic azimuth
- wind direction
- magnetoresistive transducer
- microprocessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
Abstract
A magnetic azimuth sensor used for wind direction measurement comprises a magnetoresistive sensor which is a two-axis magnetoresistive sensor HMC1022 comprising two magnetoresistive sensor bodies in the X axis and the Y axis, and a Set/Reset current band.Output of the two magnetoresistive sensor bodies in the X axis and the Y axis is output and connected with a microprocessor through a signal amplifier serial port.The Set/Reset current band of the two-axis magnetoresistive sensor is connected with the microprocessor through a Set/Reset pulse circuit.ATMEL Cotex-M4 is adopted for the microprocessor.The ATMEL Cotex-M4 processor comprises Flash of 1024 Kbytes, SRAM of 128 Kbytes, two 16-bit AD converters and two serial port interfaces.A low-power-consumption and high-precision instrument amplification chip AD8222 is adopted for the signal amplifier.IRF7205 is adopted for the Set/Reset pulse circuit.The orientation process is omitted for the magnetic azimuth sensor, and the wind direction magnetic azimuth is directly measured through serial port output.The magnetic azimuth sensor has the advantages of being low in power consumption, small in size and high in precision, the orientation process is omitted, and the wind direction magnetic azimuth can be directly measured through serial port output.
Description
Technical field
The present invention relates to a kind of magnetic azimuth sensor measured for wind direction.
Background technology
Existing polysynthesis meteorological to survey instrument uses optical encoder as wind transducer, when carrying out wind direction measurement, needs
First pass through compass or steering wheel auxiliary directional, set 0 degree of magnetic azimuth, then exported Gray code by wind transducer, through micro-
Processor calculates wind direction magnetic azimuth at mensuration, uses optical encoder as the wind of wind transducer integrated meteorological observation instrument
To technical specification: measure scope 0～360 degree, 16 orientation；Orientation, certainty of measurement ± 1/2.
Summary of the invention
Its purpose of the present invention is that provides a kind of magnetic azimuth sensor measured for wind direction, has low in energy consumption, volume
The feature that little, precision is high, default orientation process, directly can measure wind direction magnetic azimuth by serial ports output.
The technical scheme realizing above-mentioned purpose and take, including magnetoresistive transducer, described magnetoresistive transducer is twin shaft magnetic resistance
Sensor HMC1022, twin shaft magnetoresistive transducer HMC1022 include X-axis and 2 magnetoresistive transducers of Y-axis and Set/Reset electric current
Band, described X-axis and 2 magnetoresistive transducers of Y-axis export through signal amplifier serial ports output connecting microprocessor, twin shaft magneto-resistive transducing
The Set/Reset current strap of device connects microprocessor through Set/Reset impulse circuit, and described microprocessor uses ATMEL
Cotex-M4, ATMEL Cotex-M4 microprocessor carry the Flash of 1024 Kbytes, the SRAM of 128 Kbytes, 2
16-bit a/d converter, 2 serial interfaces, described signal amplifier uses low-power consumption, high-precision meter amplification chip
AD8222, described Set/Reset impulse circuit uses IRF7205, and magnetic azimuth sensor default orientation process, directly by going here and there
Wind direction magnetic azimuth is measured in mouth output.
Beneficial effect
Compared with prior art the present invention has the following advantages.
There is feature low in energy consumption, that volume is little, precision is high, default orientation process, can directly be measured by serial ports output
Wind direction magnetic azimuth.
Accompanying drawing explanation
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is this apparatus structure principle block diagram.
Detailed description of the invention
This device includes magnetoresistive transducer, as it is shown in figure 1, described magnetoresistive transducer is twin shaft magnetoresistive transducer HMC1022,
Twin shaft magnetoresistive transducer HMC1022 includes X-axis and 2 magnetoresistive transducers of Y-axis and Set/Reset current strap, described X-axis and Y-axis 2
The output of individual magnetoresistive transducer is through signal amplifier serial ports output connecting microprocessor, the Set/Reset electricity of twin shaft magnetoresistive transducer
Stream band connects microprocessor through Set/Reset impulse circuit, and described microprocessor uses ATMEL Cotex-M4, ATMEL
Cotex-M4 microprocessor carry the Flash of 1024 Kbytes, the SRAM of 128 Kbytes, 2 16-bit a/d converter,
2 serial interfaces, described signal amplifier uses low-power consumption, high-precision meter amplification chip AD8222, described Set/Reset arteries and veins
Rushing circuit and use IRF7205, magnetic azimuth sensor default orientation process, directly by serial ports output measurement wind direction magnetic azimuth
Angle.
Implement
1 structure
Mainly it is made up of magnetoresistive transducer, signal amplifier, microprocessor, Set/Reset impulse circuit.Microprocessor uses
ATMEL Cotex-M4, this chip integration is high, carry the Flash of 1024 Kbytes, the SRAM of 128 Kbytes, 2
16-bit a/d converter, 2 serial interfaces, and there is hardware floating point unit, operational capability is strong；Magnetoresistive transducer uses twin shaft
Magnetoresistive transducer HMC1022;Signal amplifier uses low-power consumption, high-precision meter amplification chip AD8222, Set/Reset pulse
Circuit uses IRF7205 composition.Magnetic azimuth sensor default orientation process, directly measures wind direction magnetic azimuth by serial ports output
Angle.
2 operation principles
As it is shown in figure 1, twin shaft magnetoresistive transducer HMC1022 includes X-axis and 2 magnetoresistive transducers of Y-axis and Set/Reset electric current
Band, the Wheatstone bridge that magnetoresistive transducer is made up of four Permalloy resistance, flows through Permalloy resistance electric current and magnetization
When the angle in direction changes, change (Δ R/R) owing to magnetoresistance causes Permalloy resistance resistance, thus cause
The output of Wheatstone bridge voltage changes, and signal amplifier AD620 is to the X-axis of twin shaft magnetoresistive transducer HMC1022 and Y-axis 2
Individual magnetoresistive transducer output voltage signal is amplified, fixed by the control Set/Reset impulse circuit of timing microprocessor signal
Time act in twin shaft magnetoresistive transducer HMC1022 Set/Reset current strap and use magnetic switch technical role to pass in twin shaft magnetic resistance
In sensor HMC1022, X-axis and 2 magnetoresistive transducers of Y-axis are to eliminate Magnetic Memory, and microprocessor ATMEL Cotex-M4 produces fixed
Time signal to Set/Reset pulse, the X-axis of timing acquiring signal amplifier AD620 output and the output of 2 magnetoresistive transducers of Y-axis
The voltage signal that amplifies also carries out A/D conversion, calculates Hard Magnetic and the compensation dosage of soft magnetism interference, resolves magnetic azimuth, passes through serial ports
Output magnetic azimuth.
1) compensation dosage of calculating elimination Hard Magnetic interference:
Hard iron magnetic field does not changes with the change of magnetic azinuth, can eliminate hard iron magnetic field over the ground by below scheme
The error that magnetic azimuth produces；Wind transducer level side, magnetic azimuth puts and slowly rotates a circle, and ATMEL Cotex-M4 adopts
The X-axis of the twin shaft magnetoresistive transducer HMC1022 that sample amplifies through signal amplifier AD620 and the electricity of 2 magnetoresistive transducers outputs of Y-axis
Pressure signal also carries out A/D conversion, by the X recorded, the maximum of Y-axis, minima (HXMAX, HXMIN, HYMAX, HYMIN) by it
It is stored in FLASH；ATMEL Cotex-M4 presses the compensation dosage (HOFF, HOFF) of the elimination Hard Magnetic interference that column count formula is asked and incites somebody to action
It is stored in FLASH.
2) resolve do not eliminate Hard Magnetic interference magnetic azimuth:
The X-axis of twin shaft magnetoresistive transducer HMC1022 that ATMEL Cotex-M4 sampling is amplified through signal amplifier AD620 and Y-axis 2
The voltage signal of individual magnetoresistive transducer output also carries out A/D conversion, and call in FLASH the X of storage, the maximum of Y-axis, minima
The compensation dosage (HOFF, HOFF) of (HXMAX, HXMIN, HYMAX, HYMIN) and elimination Hard Magnetic interference presses what column count formula was asked
Do not eliminate Hard Magnetic interference magnetic azimuth α mc.
3) compensation dosage of calculating elimination soft magnetism interference:
0 ° of side of magnetic azimuth is put 0 ° of coincidence of turntable, turntable 45 °, 90 °, 135 °, 180 °,
270 °, the magnetic azimuth of record display when 360 °, calculate differential seat angle, elimination can be obtained by formula calculated below soft
Compensating parameter A of magnetic disturbance, B, C, D, E, by offset A, B, C, D, E are stored in FLASH.
4) resolve and export magnetic azimuthResolve by step 2 and do not eliminate Hard Magnetic interference magnetic azimuth, call FLASH
The elimination soft magnetism interference of middle storage
Compensating parameter A, B, C, D, E, resolve magnetic azimuth as the following formula
ATMEL Cotex-M4 exports magnetic azimuth by serial ports。
3 functions
3.1 magnetic azimuth sensor wind directions measurement technical specifications: measurement scope 0～360 degree；Certainty of measurement 1 degree；Resolution
0.1 degree；Repeatability 0.3 degree；Frequency response 7Hz.
3.2 defaults orientation process, directly can measure wind direction magnetic azimuth by serial ports output.
3.3 eliminate magnetic azimuth sensor Magnetic Memory by magnetic switch.
By the compensating parameter calculated and test eliminates Hard Magnetic, soft magnetism disturbs, eliminated magnetic azimuth sensor by algorithm
The Hard Magnetic of magnetic, soft magnetism disturb.
Claims (1)
1. the magnetic azimuth sensor measured for wind direction, including magnetoresistive transducer, it is characterised in that described magneto-resistive transducing
Device is twin shaft magnetoresistive transducer HMC1022, twin shaft magnetoresistive transducer HMC1022 include X-axis and 2 magnetoresistive transducers of Y-axis and
Set/Reset current strap, described X-axis and 2 magnetoresistive transducer outputs of Y-axis connect micro-process through the output of signal amplifier serial ports
Device, the Set/Reset current strap of twin shaft magnetoresistive transducer connects microprocessor, described micro-process through Set/Reset impulse circuit
Device use ATMEL Cotex-M4, ATMEL Cotex-M4 microprocessor carry the Flash of 1024 Kbytes, 128
The SRAM of Kbytes, 2 16-bit a/d converter, 2 serial interfaces, described signal amplifier uses low-power consumption, in high precision
Instrument amplification chip AD8222, described Set/Reset impulse circuit uses IRF7205, and magnetic azimuth sensor default oriented
Journey, directly measures wind direction magnetic azimuth by serial ports output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610234680.2A CN105717325A (en) | 2016-04-15 | 2016-04-15 | Magnetic azimuth sensor used for wind direction measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610234680.2A CN105717325A (en) | 2016-04-15 | 2016-04-15 | Magnetic azimuth sensor used for wind direction measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105717325A true CN105717325A (en) | 2016-06-29 |
Family
ID=56160242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610234680.2A Withdrawn CN105717325A (en) | 2016-04-15 | 2016-04-15 | Magnetic azimuth sensor used for wind direction measurement |
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| Country | Link |
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| CN (1) | CN105717325A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216104A (en) * | 1997-02-10 | 1999-05-05 | 莱卡地球系统公开股份有限公司 | Method for determining correction parameters |
| US20010009367A1 (en) * | 1999-02-26 | 2001-07-26 | Dieter Seitzer | Sensor device to record speed and motion direction of an object, especially rotational speed and direction of a rotating object |
| CN203224510U (en) * | 2013-05-10 | 2013-10-02 | 宜昌东方微磁科技有限责任公司 | Wind direction sensor |
| CN103575259A (en) * | 2012-07-27 | 2014-02-12 | 宜昌东方微磁科技有限责任公司 | Two-dimensional electronic compass module |
-
2016
- 2016-04-15 CN CN201610234680.2A patent/CN105717325A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216104A (en) * | 1997-02-10 | 1999-05-05 | 莱卡地球系统公开股份有限公司 | Method for determining correction parameters |
| US20010009367A1 (en) * | 1999-02-26 | 2001-07-26 | Dieter Seitzer | Sensor device to record speed and motion direction of an object, especially rotational speed and direction of a rotating object |
| CN103575259A (en) * | 2012-07-27 | 2014-02-12 | 宜昌东方微磁科技有限责任公司 | Two-dimensional electronic compass module |
| CN203224510U (en) * | 2013-05-10 | 2013-10-02 | 宜昌东方微磁科技有限责任公司 | Wind direction sensor |
Non-Patent Citations (2)
| Title |
|---|
| 时劭华等: "基于GMR传感器的小体积二维电子罗盘设计", 《机电工程》 * |
| 牛秀范: "便携式风速风向测量仪", 《中国优秀硕士学位论文你全文数据库》 * |
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Application publication date: 20160629 |
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| WW01 | Invention patent application withdrawn after publication |