CN206146426U - A device of magnetic field environment steadily is provided - Google Patents
A device of magnetic field environment steadily is provided Download PDFInfo
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- CN206146426U CN206146426U CN201621191270.6U CN201621191270U CN206146426U CN 206146426 U CN206146426 U CN 206146426U CN 201621191270 U CN201621191270 U CN 201621191270U CN 206146426 U CN206146426 U CN 206146426U
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- magnetic field
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Abstract
The utility model provides a device of magnetic field environment steadily is provided, the ascending magnetic field in three mutually perpendicular side of three -axis magnetic sensor measurements surrounding environment, magnetism signal processing module is the linear signal of telecommunication with the magnetic field signal conversion that three -axis magnetic sensor measurements arrived, the three mutually perpendicular's of external magnetic field change weight is calculated to multichannel signal synthesis module according to the linear electric signal superposition of multichannel, the current amplification module converts the three magnetic variation weight of multichannel signal synthesis module output into corresponding electric current source signal, three -dimensional helmholtz coil is according to the external variable magnetic field of electric current source signal compensation, in order to form stable ground magnetic field environment. The utility model discloses the cost is lower, easily realizes, does benefit to and improves measurement accuracy, not restricted by the test time place.
Description
Technical field
The utility model is related to marine product detection field, more particularly to a kind of device for providing stably magnetic field environment.
Background technology
Marine magnetic compass rose is that instrument is pointed in important navigation, and general ship at least installs a standard magnetic compass or a behaviour
Rudder compass.International Maritime Organization (IMO) regulation in 1977, the navigation and communication equipment installed in driving cabin must provide for and sieve
Jing safe distances.Magnetic field of the earth and ship environment magnetic field can cause the admittance instrument magnetization of ship-handling cabin, compass to make in the magnetic force
Deviation can be produced with, the direction of magnetic meridian is offset from.For determine with such impact communication leading instrument and meter with
Minimum range between compass, i.e. compass deviation meet the safe distance of navigation requirement, it is necessary to provide required phase during the measurement
To stable earth's magnetic field environment.
The test of compass safe distance is the relation using earth magnetic field intensity with angle, and the measurement of angle will be converted into
Measurement to magnetic field intensity, reads the distance of tested instrument and meter each unit and magnetometer while magnetic field intensity is measured.One
As when testing, it is desirable to select one except earth magnetism the spaciousness place without other magnetic disturbances outside the venue, that is, require to provide a stable ground
Magnetic field environment.One kind is achieved in that：Pass through steel plate in the lab, silicon steel sheet and permalloy set up the experiment of geomagnetic shielding
Room, then builds the earth's magnetic field of needs in shielding indoors artificial, and the shortcoming of the method is that cost is too high, and floor space is big, construction
Cycle is long, and equipment cannot be moved, and is not easy to testing large equipment, and advantage is that magnetic field environment is stablized, and can simulate ground as needed
Ball different longitude and latitude magnetic field.Another kind is achieved in that base area magnetic variation law and external environment change, and select at night,
It is activity few time period such as people's car, less demanding to measuring accuracy and ignore external interference earth's magnetic field to measure, this method
Have the disadvantage to receive the restriction of testing time.
Utility model content
The utility model provides a kind of device for providing stably magnetic field environment, and by magnetic sensor extraneous magnetic is monitored
Environmental change, constantly compensates in Helmholtz coil, to compensate the change of external magnetic field, so as to provide magnetic compass safety away from
Stably magnetic field environment needed for test, the utility model cost is relatively low, it is easy to accomplish, beneficial to certainty of measurement is improved, do not receive
Testing time place restriction.
In order to achieve the above object, the utility model provides a kind of device for providing stably magnetic field environment, comprising：
Multiple magnetic sensors, it is arranged on the stably measurement of magnetic field environment week needed for the test of magnetic compass safe distance
Enclose, the magnetic sensor is used to measure the magnetic field in stably three mutually perpendicular directions of measurement of magnetic field environment；
Multiple magnetic signal processing modules, each magnetic signal processing module is electrically connected with a magnetic sensor, uses
Linear electric signal is converted in the field signal for measuring magnetic sensor；
Multiple signals synthesis module, it is electrically connected with all of magnetic signal processing module, for according to multi-channel linear telecommunications
Three orthogonal components of number superposition calculation external magnetic field change；
Three Current amplifier modules, it is electrically connected with multiple signals synthesis module, for three changes of magnetic field components to be divided
Be not converted to corresponding current source signal；
Three-dimensional Helmholtz coil, it is electrically connected with three Current amplifier modules, for outer according to current source signal compensation
Boundary variation magnetic field, to form stably magnetic field environment.
If the quantity of magnetic sensor is more than one, all of magnetic sensor is uniformly arranged on into test environment
Around, if the quantity of magnetic sensor is one, the magnetic sensor is arranged on into changes of magnetic field amount in five minutes big
In the region of 500nT.
Described multiple signals synthesis module adopts host computer.
Described three-dimensional Helmholtz coil is shaped as even numbers polygon or circle.
The utility model monitors external magnetic field environmental change by magnetic sensor, and constantly compensation is to Helmholtz coil
In, to compensate the change of external magnetic field, the stably magnetic field environment needed for so as to provide the test of magnetic compass safe distance, this practicality
New cost is relatively low, it is easy to accomplish, beneficial to certainty of measurement is improved, tested person time place does not limit.
Description of the drawings
Fig. 1 is a kind of structural representation of offer stably device of magnetic field environment that the utility model is provided
Specific embodiment
Preferred embodiment of the present utility model is illustrated below according to Fig. 1.
As shown in figure 1, the utility model provides a kind of device for providing stably magnetic field environment, comprising：
Multiple magnetic sensors 1, it is arranged on the stably measurement of magnetic field environment needed for the test of magnetic compass safe distance
Around, the magnetic sensor 1 is used to measure the magnetic field in stably three mutually perpendicular directions of measurement of magnetic field environment；
Multiple magnetic signal processing modules 2, each magnetic signal processing module 2 is electrically connected with a magnetic sensor 1,
Field signal for magnetic sensor to be measured is converted to linear electric signal；
Multiple signals synthesis module 3, it is electrically connected with all of magnetic signal processing module 2, for according to multi-channel linear electricity
Signal averaging calculates three orthogonal components of external magnetic field change；
Three Current amplifier modules 4, it is electrically connected with multiple signals synthesis module 3, for by three changes of magnetic field components
It is respectively converted into corresponding current source signal；
Three-dimensional Helmholtz coil 5, it is electrically connected with three Current amplifier modules 4, for being compensated according to current source signal
Extraneous variation magnetic field, to form stably magnetic field environment.
The orthogonal magnetic field in measurable three directions of described magnetic sensor, in the present embodiment, three axles of employing
The Measurement Resolution of Magnetic Sensor is below 10nT, and range is not less than 100000nT.
If the quantity of magnetic sensor is more than one, all of magnetic sensor is uniformly arranged on into test environment
Around, if the quantity of magnetic sensor is one, the magnetic sensor is arranged on into changes of magnetic field amount in five minutes big
In the region of 500nT, the quantity of magnetic sensor is more, and measurement of magnetic field precision is bigger.
Described multiple signals synthesis module can adopt host computer.
Described three-dimensional Helmholtz coil is made up of three orthogonal coils, to compensate extraneous change magnetic
, the three-dimensional Helmholtz coil is shaped as double-layer circular, and the number of turn and size and the size of the homogeneity range in magnetic field of coil have
Close.
Magnetic field intensity B
μ in formula0=4 π 10-7H/m, N are coil turn, and I is the DC current led on coil, and R is Helmholtz coil
Radius, Y is origin for the midpoint of two hub of a spool point lines of Helmholtz.
A kind of device of the offer provided using the utility model stably magnetic field environment is providing stably magnetic field environment
Method comprise the steps of：
Magnetic field in step S1, three mutually perpendicular directions of magnetic sensor measurement surrounding environment；
The field signal that magnetic sensor is measured is converted to linear electric signal by step S2, magnetic signal processing module；
Magnetic signal processing module simultaneously removes the noise signal in field signal, makes data have the preferable linearity；
Three phases that step S3, multiple signals synthesis module change according to multi-channel linear electric signal superposition calculation external magnetic field
Mutual vertical component；
Step S4, Current amplifier module are converted to three changes of magnetic field components that multiple signals synthesis module is exported relatively
The current source signal answered；
Current source signal size is proportional with the changes of magnetic field amount size of input, with extraneous Helmholtz coil impedance
It is unrelated；
Step S5, three-dimensional Helmholtz coil compensate extraneous variation magnetic field according to current source signal, to form stable earth magnetism
Field environment.
In described step S3, the method for superposition calculation magnetic-field component is included：Mean value computation method and proportionality coefficient calculating method.
Described host computer is included using the method for mean value computation method calculating magnetic field component：
1st, the multi-channel linear electric signal (analog signal) that magnetic signal processing module is exported is converted to into data signal；
2nd, spectral artifacts are removed by filtering mode；
3rd, data signal is averaged according to the quantity of magnetic sensor, obtains the X/Y/Z tri- of external magnetic field change
The component of individual mutually perpendicular direction；
4th, the component of tri- mutually perpendicular directions of X/Y/Z of external magnetic field change will be obtained through digital to analog conversion, output three
The simulation controlled quentity controlled variable in individual direction.
The method of described host computer adoption rate coefficient calculating method calculating magnetic field component is included：
1st, the multi-channel linear electric signal (analog signal) that magnetic signal processing module is exported is converted to into data signal；
2nd, spectral artifacts are removed by filtering mode；
3rd, Δ T is respectively according to descending arrangement in the durection components of X/Y/Z tri- according to changes of magnetic field numerical value1,ΔT2,…
ΔTn, remove minimax variation magnetic field value Δ T1,ΔTn, calculate tri- mutually perpendicular directions of X/Y/Z of external magnetic field change
Component Δ T：
Δ T=(Δ T2*0.9+ΔT3*0.8+ΔT4…ΔTn-3+ΔTn-2*1.2+ΔTn-1* 1.1)/n-2, n >=4；
Δ T=(Δ T1+…+ΔTn)/n, n≤3；
4th, the component of tri- mutually perpendicular directions of X/Y/Z of external magnetic field change will be obtained through digital to analog conversion, output three
The simulation controlled quentity controlled variable in three directions of output in individual direction.
The utility model monitors external magnetic field environmental change by magnetic sensor, and constantly compensation is to Helmholtz coil
In, to compensate the change of external magnetic field, the stably magnetic field environment needed for so as to provide the test of magnetic compass safe distance, this practicality
New cost is relatively low, it is easy to accomplish, beneficial to certainty of measurement is improved, tested person time place does not limit.
Although content of the present utility model has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as to restriction of the present utility model.After those skilled in the art have read the above, for
Various modifications and substitutions of the present utility model all will be apparent.Therefore, protection domain of the present utility model should be by appended
Claim limiting.
Claims (4)
1. a kind of device of offer stably magnetic field environment, it is characterised in that include：
Multiple magnetic sensors（1）, it is arranged on the stably measurement of magnetic field environment week needed for the test of magnetic compass safe distance
Enclose, the magnetic sensor（1）For the magnetic field in measurement stably three mutually perpendicular directions of measurement of magnetic field environment；
Multiple magnetic signal processing modules（2）, each magnetic signal processing module（2）It is electrically connected with a magnetic sensor
（1）, the field signal for magnetic sensor to be measured is converted to linear electric signal；
Multiple signals synthesis module（3）, it is electrically connected with all of magnetic signal processing module（2）, for according to multi-channel linear electricity
Signal averaging calculates three orthogonal components of external magnetic field change；
Three Current amplifier modules（4）, it is electrically connected with multiple signals synthesis module（3）, for by three changes of magnetic field components
It is respectively converted into corresponding current source signal；
Three-dimensional Helmholtz coil（5）, it is electrically connected with three Current amplifier modules（4）, for being compensated according to current source signal
Extraneous variation magnetic field, to form stably magnetic field environment.
2. the device of stably magnetic field environment is provided as claimed in claim 1, it is characterised in that if the number of magnetic sensor
Amount is more than one, then all of magnetic sensor is uniformly arranged on around test environment, if the quantity of magnetic sensor
For one, then the magnetic sensor is arranged on into region of the changes of magnetic field amount more than 500nT in five minutes.
3. the device of stably magnetic field environment is provided as claimed in claim 1, it is characterised in that described multiple signals synthesis
Module adopts host computer.
4. the device of stably magnetic field environment is provided as claimed in claim 1, it is characterised in that described three-dimensional Helmholtz
Coil is shaped as even numbers polygon or circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621191270.6U CN206146426U (en) | 2016-11-01 | 2016-11-01 | A device of magnetic field environment steadily is provided |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621191270.6U CN206146426U (en) | 2016-11-01 | 2016-11-01 | A device of magnetic field environment steadily is provided |
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| CN206146426U true CN206146426U (en) | 2017-05-03 |
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| CN201621191270.6U Expired - Fee Related CN206146426U (en) | 2016-11-01 | 2016-11-01 | A device of magnetic field environment steadily is provided |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289206A (en) * | 2016-11-01 | 2017-01-04 | 上海海事大学 | A kind of apparatus and method that stably magnetic field environment is provided |
| CN109839877A (en) * | 2019-03-03 | 2019-06-04 | 上海卯瑞船舶设备有限公司 | A kind of monitoring device remotely managed for ship and its application method |
| CN110161287A (en) * | 2019-04-07 | 2019-08-23 | 深圳市雷立科技有限公司 | The high-precision magnetic field generation system of Active Compensation external world direct current and alternating current magnetic field interference |
-
2016
- 2016-11-01 CN CN201621191270.6U patent/CN206146426U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289206A (en) * | 2016-11-01 | 2017-01-04 | 上海海事大学 | A kind of apparatus and method that stably magnetic field environment is provided |
| CN109839877A (en) * | 2019-03-03 | 2019-06-04 | 上海卯瑞船舶设备有限公司 | A kind of monitoring device remotely managed for ship and its application method |
| CN110161287A (en) * | 2019-04-07 | 2019-08-23 | 深圳市雷立科技有限公司 | The high-precision magnetic field generation system of Active Compensation external world direct current and alternating current magnetic field interference |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20171101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |