CN102589536A - Electronic compass with self-correcting function - Google Patents
Electronic compass with self-correcting function Download PDFInfo
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- CN102589536A CN102589536A CN2012100340502A CN201210034050A CN102589536A CN 102589536 A CN102589536 A CN 102589536A CN 2012100340502 A CN2012100340502 A CN 2012100340502A CN 201210034050 A CN201210034050 A CN 201210034050A CN 102589536 A CN102589536 A CN 102589536A
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Abstract
The invention discloses an electronic compass with a self-correcting function. The electronic compass comprises a circuit board, a circuit part and a magnetic induction sensor group, wherein the circuit part and the magnetic induction sensor group are arranged on the circuit board; the magnetic induction sensor group consists of at least four magnetic induction sensors which are distributed along a 360-degree circle at an equal angle interval; a peripheral circuit is arranged in the circuit part corresponding to each magnetic induction sensor; and two magnetic induction sensors between which an included angle of 90 degrees is formed are connected to the same peripheral circuit. Magnetic field information in an environment is not required to be acquired and compensated by rotating the electronic compass, and the electronic compass is convenient to use; meanwhile, the interference resistance of the electronic compass to an ambient interference magnetic field is effectively improved; and moreover, the electronic compass has a simple structure, the measurement accuracy can be improved further, and the number of corresponding magnetic induction sensors can be set according to the accuracy requirement.
Description
Technical field
The present invention relates to the electronic compass navigator that a kind of base area signal magnetic field is taken one's bearings, be specially a kind of electronic compass design with self-correcting function.
Background technology
Navigational system has obtained using widely in the every field that comprises aircraft, naval vessel, vehicle.Than airmanship commonly used at present such as GPS navigation and gyroscope navigation; Advantages such as the sub-dead reckoning technology of magnetoelectricity has that volume is little, cost is low, no cumulative errors and intellectuality; The sub-compass of magnetoelectricity of miniaturization at present has been widely used in smart mobile phone, auto navigation and location, field exploration and search and rescue, geologic prospecting and various military use, has huge marketable value and potentiality.
The principle of electronic compass is to utilize the magnetic field of the earth to position and since the earth have one all the time the size of directed north be the magnetic field about 0.5Oe, electronic compass is exactly to judge the orientation through the size and Orientation of measuring this magnetic field.Utilize the magnetic field of the earth to judge the orientation, must obtain the data of X and Y direction magnetic field of the earth component Hx and Hy on the surface level simultaneously, come computer azimuth angle according to following formula then:
All two-dimentional electronic compasss all are to adopt two mutually perpendicular magnetic induction sensors that are spliced to survey the magnetic field of the earth of X and Y direction at present; If compass is not on surface level; Then must adopt mutually perpendicular three magnetic induction sensors to survey the magnetic field of X, Y, three directions of Z, also will add obliquity sensor in addition.
The factor that influences the maximum of accuracy of electronic compass is the interference of ambient stray field; When compass during in the regional work that has no magnetisable material; It can measure component Hx and Hy and this data based (1) formula location of utilization in X and Y direction, magnetic field of the earth accurately, provides correct deflection.At this moment its X and Y direction reading should be a circle with the variation of angle, and be as shown in Figure 1.But in fact possibly exist various magnetisable materials and disturbing magnetic field around the compass; Like automobile, aircraft and various magnetic metal; These all can greatly influence the precision of compass, and at this moment its reading is the irregular circle that an initial point departs from the center of circle, and is as shown in Figure 2.Therefore high-precision compass must adopt various compensation techniques to offset the interference of external magnetic field, corrects the data of electronic compass and judges to be used for final direction with the size that obtains the terrestrial magnetic field accurately.
The correcting technology of at present all electronic compasss all is to adopt following method: at first be the ambient stray field information of gathering place, electronic compass place; Concrete operations are following: evenly forward electronic compass to 360 degree in the environment around; Note in the whole process the minimum and maximum value in magnetic field on the X and Y direction simultaneously, according to following formula magnetic-field component Hx and Hy on X and the Y direction are corrected then.
Correct the back and just can obtain the magnetic field size of correct X and Y direction, and then calculate the position angle, as shown in Figure 3.
Because the environment for use of electronic compass varies and constantly changes; In the field of having relatively high expectations for measuring accuracy; Must rotate electronic compass whenever and wherever possible the magnetic field of measurement environment is compensated, could obtain data and information exactly, this has just brought very big trouble to use; Especially in the complicated place of some magnetic field environments, the user must gyrate electronic compass so that compensate for disturbances magnetic field has obtained magnetic field of the earth information accurately at any time.
Summary of the invention
The purpose of this invention is to provide a kind of self-correcting electronic compass, electronic compass need rotate the problem that electronic compass is gathered the Magnetic Field in the environment and compensated whenever and wherever possible in the prior art when navigating to solve.
For achieving the above object, the technical scheme that the present invention adopts is:
A kind of electronic compass design with self-correcting function; Comprise circuit board, circuit part and magnetic induction sensor group; Said circuit part and magnetic induction sensor group are installed on the circuit board; It is characterized in that: said magnetic induction sensor group is made up of the magnetic induction sensor that is no less than the 360 degree annular equal angles distributions of 4 edges at least; Corresponding each magnetic induction sensor is equipped with peripheral circuit in the said circuit part, and two magnetic induction sensors of the 90 degree angles of being separated by are connected on the same peripheral circuit.
Described a kind of electronic compass design with self-correcting function is characterized in that: also be provided with sensor that is used for metering circuit plate inclination angle that is electrically connected with circuit part respectively and the magnetic induction sensor that is used for metering circuit board plane vertical direction magnetic field size on the said circuit board.
Described a kind of electronic compass design with self-correcting function; It is characterized in that: the cmos circuit that said circuit part adopts the large scale integrated circuit semiconductor technology to make, the magnetic induction sensor group is electrically connected with the cmos circuit that the large scale integrated circuit semiconductor technology is made.
Described a kind of self-correcting electronic compass, it is characterized in that: said magnetic induction sensor is selected the tunnel junction magnetic induction sensor for use, or the giant magnetoresistance magnetic induction sensor, or the anisotropy sensor, or hall effect sensor, or the semiconductor material magnetic induction sensor.
Beneficial effect of the present invention is:
The present invention adopts many to orthogonal magnetic induction sensor design; The Magnetic Field that is equivalent to the measured environment of a plurality of sensor acquisition; Therefore need be when navigation not gather the Magnetic Field in the environment and compensate through rotating electronic compass, use conveniently, and the present invention be simple in structure; Simultaneously also being equivalent to a plurality of conditional electronic compass measures simultaneously; Can make even all to eliminate discretization error to it, improve electronic compass effectively, further improve measuring accuracy and can corresponding magnetic induction sensor quantity be set according to the precision needs to the interference free performance of disturbing magnetic field on every side.
Description of drawings
Electronic compass when Fig. 1 is noiseless magnetic field is with the variation synoptic diagram of angle.
Fig. 2 is that electronic compass when disturbing magnetic field is arranged is with the variation synoptic diagram of angle.
Fig. 3 is when disturbing magnetic field is arranged but through the electronic compass of the overcorrection variation synoptic diagram with angle.
Fig. 4 is magnetic induction sensor group structural representation among the present invention.
Embodiment
The present invention includes circuit board, circuit part and magnetic induction sensor group; Circuit part and magnetic induction sensor group are installed on the circuit board; The magnetic induction sensor group is made up of the magnetic induction sensor that is no less than the 360 degree annular equal angles distributions of 4 edges at least; As shown in Figure 4, corresponding each magnetic induction sensor is equipped with peripheral circuit in the circuit part, and two magnetic induction sensors of the 90 degree angles of being separated by are connected on the same peripheral circuit.
Also be provided with sensor that is used for metering circuit plate inclination angle that is electrically connected with circuit part respectively and the magnetic induction sensor that is used for metering circuit board plane vertical direction magnetic field size on the circuit board.
Magnetic induction sensor is selected the tunnel junction magnetic induction sensor for use, or the giant magnetoresistance magnetic induction sensor, or the anisotropy sensor, or hall effect sensor, or the semiconductor material magnetic induction sensor.
To select the anisotropy Magnetic Sensor for use is example; Electronic compass comprises a plurality of anisotropy Magnetic Sensors with single or a plurality of magnetosensitive sense directions; One is used for the printed circuit board (PCB) that links to each other with these sensors, is used to realize the line and the pad of various electronic devices and components functions on the circuit board on the cloth.Magnetic induction sensor is every to be evenly distributed on the circuit board at a distance from certain angle (for example 1 degree, 2 degree, 3 degree, 4 degree, 5 degree, 6 degree, 9 degree, 10 degree, 20 degree, 30 degree or 60 degree etc.); And link to each other with the electronic devices and components of the various functions on mode and the circuit board of welding; Be separated by 90 the degree two sensors adopt same peripheral circuit; In addition; Also comprise a sensor (can be acceleration transducer or other any type of obliquity sensors) that is used to measure the inclination angle on this board circuit, can measure the Magnetic Sensor (this sensor can be any type of Magnetic Sensors such as tunnel junction sensor, giant magnetoresistance sensor, anisotropy sensor, semiconductor magnetic sensor) big or small for one with circuit board plane vertical direction magnetic field.The A/D that this peripheral circuit comprises the amplifier (generally each magnetic induction sensor needs is) that can amplify the output signal of each magnetic induction sensor, each analog output signal that has been exaggerated is carried out the digital signal conversion, and can be to the single-chip microcomputer of precision more than 8 of handling through the digital output signal of changing.
Claims (4)
1. electronic compass design with self-correcting function; Comprise circuit board, circuit part and magnetic induction sensor group; Said circuit part and magnetic induction sensor group are installed on the circuit board; It is characterized in that: said magnetic induction sensor group is made up of the magnetic induction sensor that is no less than the 360 degree annular equal angles distributions of 4 edges at least; Corresponding each magnetic induction sensor is equipped with peripheral circuit in the said circuit part, and two magnetic induction sensors of the 90 degree angles of being separated by are connected on the same peripheral circuit.
2. a kind of electronic compass design with self-correcting function according to claim 1 is characterized in that: also be provided with the sensor and the magnetic induction sensor that is used for metering circuit board plane vertical direction magnetic field size that are used for inclination angle, plane, metering circuit plate place that are electrically connected with circuit part respectively on the said circuit board.
3. a kind of electronic compass design according to claim 1 with self-correcting function; It is characterized in that: the cmos circuit that said circuit part adopts the large scale integrated circuit semiconductor technology to make, the magnetic induction sensor group is electrically connected with the cmos circuit that the large scale integrated circuit semiconductor technology is made.
4. a kind of self-correcting electronic compass according to claim 1; It is characterized in that: said magnetic induction sensor is selected the tunnel junction magnetic induction sensor for use, or the giant magnetoresistance magnetic induction sensor, or the anisotropy sensor; Or hall effect sensor, or semiconductor material magnetic induction sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100340502A CN102589536A (en) | 2012-02-15 | 2012-02-15 | Electronic compass with self-correcting function |
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| CN2012100340502A CN102589536A (en) | 2012-02-15 | 2012-02-15 | Electronic compass with self-correcting function |
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| CN2012100340502A Pending CN102589536A (en) | 2012-02-15 | 2012-02-15 | Electronic compass with self-correcting function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175520A (en) * | 2013-03-20 | 2013-06-26 | 中国科学院深圳先进技术研究院 | Method, device and equipment for correcting electronic compass |
| CN105606082A (en) * | 2015-12-22 | 2016-05-25 | 中航华东光电有限公司 | Method for correcting north reference precision of electronic compass |
| CN106441360A (en) * | 2016-09-21 | 2017-02-22 | 广州视源电子科技股份有限公司 | Azimuth calibration method and device |
| CN108801207A (en) * | 2018-08-13 | 2018-11-13 | 厦门特力通信息技术股份有限公司 | A kind of magnetic azimuth detection device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101208578A (en) * | 2003-02-24 | 2008-06-25 | 金泰克斯公司 | Electronic compass system |
| US7400142B2 (en) * | 2003-11-06 | 2008-07-15 | Stephen John Greelish | Dynamic magnetic anomaly compensation |
| CN101699220A (en) * | 2009-10-21 | 2010-04-28 | 南京中网卫星通信股份有限公司 | Automatic correction control device for electronic compass of vehicle-mounted satellite antenna and control method thereof |
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2012
- 2012-02-15 CN CN2012100340502A patent/CN102589536A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101208578A (en) * | 2003-02-24 | 2008-06-25 | 金泰克斯公司 | Electronic compass system |
| US7400142B2 (en) * | 2003-11-06 | 2008-07-15 | Stephen John Greelish | Dynamic magnetic anomaly compensation |
| CN101699220A (en) * | 2009-10-21 | 2010-04-28 | 南京中网卫星通信股份有限公司 | Automatic correction control device for electronic compass of vehicle-mounted satellite antenna and control method thereof |
Non-Patent Citations (1)
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| 晁敏等: "磁罗盘误差分析与校准", 《传感技术学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175520A (en) * | 2013-03-20 | 2013-06-26 | 中国科学院深圳先进技术研究院 | Method, device and equipment for correcting electronic compass |
| CN103175520B (en) * | 2013-03-20 | 2018-01-09 | 中国科学院深圳先进技术研究院 | Method for calibrating electronic compass, device and equipment |
| CN105606082A (en) * | 2015-12-22 | 2016-05-25 | 中航华东光电有限公司 | Method for correcting north reference precision of electronic compass |
| CN105606082B (en) * | 2015-12-22 | 2019-04-09 | 中航华东光电有限公司 | Electronic compass refers to northern precision correcting method |
| CN106441360A (en) * | 2016-09-21 | 2017-02-22 | 广州视源电子科技股份有限公司 | Azimuth calibration method and device |
| CN106441360B (en) * | 2016-09-21 | 2019-08-13 | 广州视源电子科技股份有限公司 | Bearing calibration method and device |
| CN108801207A (en) * | 2018-08-13 | 2018-11-13 | 厦门特力通信息技术股份有限公司 | A kind of magnetic azimuth detection device and method |
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Application publication date: 20120718 |