CN101566676A - Magnetic field measurement system and method for measuring magnetic field - Google Patents
Magnetic field measurement system and method for measuring magnetic field Download PDFInfo
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- CN101566676A CN101566676A CNA2009103025457A CN200910302545A CN101566676A CN 101566676 A CN101566676 A CN 101566676A CN A2009103025457 A CNA2009103025457 A CN A2009103025457A CN 200910302545 A CN200910302545 A CN 200910302545A CN 101566676 A CN101566676 A CN 101566676A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005259 measurement Methods 0.000 title claims abstract description 35
- 230000006698 induction Effects 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 28
- 230000003321 amplification Effects 0.000 claims description 24
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 24
- 238000012937 correction Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
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- 238000000053 physical method Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention relates to a magnetic field measurement system, comprising: a magnetic field induction assembly for measuring the magnetic field, a signal acquisition assembly for acquiring the magnetic field signals conductive to the magnetic field conductive assembly and a signal process module for processing the signals acquired by the signal acquisition assembly. The magnetic field induction assembly comprises a first coil, a second coil, a third coil which are enclosed into a shape of the Chinese character of ''pin'' and the central lines of the three coils are mutually perpendicular. The first, second and third coils are connected to a common end. The signal acquisition assembly also comprises a first signal acquisition assembly, a second signal acquisition assembly and a third signal acquirement assembly connected with the coils correspondingly. The invention uses three coils for measuring the magnetic field, measures the magnetic field in three directions and acquires the accurate magnetic field size based on the magnetic field acquiring signal from three directions.
Description
Technical field
The present invention relates to the method in a kind of magnetic field measurement system and measurement magnetic field, relate in particular to a kind of measuring system and method for measuring the magnetic field of Weak magentic-field and circumstance complication.
Background technology
At present, the method for measurement electromagnetic field has two kinds: promptly: physical measurement method and magnetic induction coil measuring method.
Traditional physical measurement method is to utilize the experimental formula of F=QVB to measure indirectly, by measuring this several physical field respectively, calculates the electromagnetic field size of the environment of being built again with experimental formula.The advantage of this measuring method is that the result who measures is accurate, but this method just is useful in the breadboard experiment, and the magnetic field of the environment of just being built during experiments of measuring, promptly is to measure under ideal environment.If consider the magnetic field of measuring surrounding environment, the accuracy of Ce Lianging just reduces greatly owing to imperfectization of external environment so, and the measurement of charge number is not easy to realize very much in the measurement of reality, and therefore this method detects the magnetic field of surrounding environment with regard to being not suitable for.
Measure the intensity in magnetic field by magnetic induction coil, just can induce a certain size alternating voltage when having alternating magnetic fields to exist in the magnetic induction coil by electromagnetic induction, can come indirect calculation to go out the magnetic field intensity of coil inside by the voltage that the measurement induced by magnetic field comes out, thereby reach the purpose of measuring coil magnetic field intensity on every side.This is present the most frequently used a kind of measuring method, but this method can only be measured the magnetic field of a direction, the magnetic field of three directions is measured respectively with regard to needing timesharing if measure the magnetic field intensity of entire environment, measurement data is being carried out the exact value that secondary treating just can obtain environmental magnetic field then, if under the environment condition of severe, just the intensity of current magnetic field can accurately do not measured like this.
Summary of the invention
The technical matters that the present invention solves is: overcome and once can only measure a direction magnetic field in the prior art, can not measure the technical matters in the magnetic field of a plurality of directions simultaneously when circumstance complication.
The technical scheme of technical solution problem of the present invention is: make up a kind of magnetic field measurement system, comprise: the magnetic field induction assembly of measuring magnetic field, the signals collecting assembly that the field signal of magnetic field induction assembly induction is gathered, the signal processing module that the signal of described signals collecting assembly collection is handled, described magnetic field induction assembly comprises first coil, second coil, tertiary coil, described first coil, second coil, tertiary coil becomes the center line of " product " font and three coils to place mutual vertically, described first coil, second coil and tertiary coil are connected to a common port, and described signals collecting assembly also comprises the first signals collecting assembly of corresponding with described coil respectively connection, the secondary signal acquisition component, the 3rd signals collecting assembly.
The further technical scheme of technical solution problem of the present invention is: described first coil is vertical coil, and described second coil and described tertiary coil are horizontal coil.
The further technical scheme of technical solution problem of the present invention is: described signal processing module comprises signal calibration unit and magnetic field treated unit.
The further technical scheme of technical solution problem of the present invention is: also comprise the magnetic field correction unit, described magnetic field correction unit by the numerical value of two point measurements to formula T=KV+B in two parameters of K, B proofread and correct.
The further technical scheme of technical solution problem of the present invention is: described signal processing module comprises signal amplification unit, and the field signal that collects is amplified.
The further technical scheme of technical solution problem of the present invention is: described signal amplification unit comprises first signal amplification unit that amplifies the field signal of gathering and the secondary signal amplifying unit that amplifies the described first signal amplification unit amplifying signal.
The technical scheme of technical solution problem of the present invention is: a kind of method of measuring magnetic field is provided, comprises the steps:
The magnetic-field measurement assembly is set: become the center line of " product " font and three coils to place mutual vertically described first coil, second coil, tertiary coil, the described first signals collecting assembly, secondary signal acquisition component and the 3rd signals collecting assembly difference correspondence are connected with corresponding coil, the signals collecting assembly is connected with signal processing module;
Gather field signal: described signals collecting assembly is gathered the field signal of corresponding field coil respectively simultaneously;
Handle field signal: handle by signal processing module and gather the field signal that the field signal step is gathered.
The further technical scheme of technical solution problem of the present invention is: described processing field signal step process field signal comprises the field signal amplification process.
The further technical scheme of technical solution problem of the present invention is: described field signal amplification process comprises that the first order of field signal is amplified and amplify the second level.
The further technical scheme of technical solution problem of the present invention is: described processing field signal step process field signal also comprises the magnetic field correction step, promptly by the numerical value of two point measurements to formula T=KV+B in two parameters of K, B proofread and correct, wherein T represents magnetic induction density, V represents magnetic induction voltage, and K, B are parameter.
The technique effect that technical solution of the present invention produces is: adopt three coils of measuring magnetic field, three coils become " product " font and center line to place mutual vertically, measure the magnetic field of three directions simultaneously, the magnetic field acquired signal according to three directions obtains accurate magnetic field size again
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a field coil connection layout of the present invention.
Fig. 3 is an acquired signal enlarged diagram of the present invention.
Fig. 4 is the method flow diagram in measurement of the present invention magnetic field.
Fig. 5 is the method preferred implementation figure in measurement of the present invention magnetic field.
Embodiment
Below in conjunction with specific embodiment, technical solution of the present invention is further specified.
As Fig. 1, shown in Figure 2, the present invention makes up a kind of magnetic field measurement system, comprise: the magnetic field induction assembly 1 of measuring magnetic field, the signals collecting assembly 2 that the field signal of magnetic field induction assembly 1 induction is gathered, the signal processing module 3 that the signal that described signals collecting assembly 2 is gathered is handled, described magnetic field induction assembly 1 comprises first coil 11, second coil 12, tertiary coil 13, described first coil 11, second coil 12, the center line of 13 one-tenth " product " fonts of tertiary coil and three coils is placed mutual vertically, described first coil 11, second coil 12 and tertiary coil 13 are connected to a common port, and described signals collecting assembly 2 also comprises the first signals collecting assembly 21 of corresponding with described coil respectively connection, secondary signal acquisition component 22, the 3rd signals collecting assembly 23.Just can induce a certain size alternating voltage when having alternating magnetic fields to exist in the magnetic induction coil by electromagnetic induction, the alternating voltage that produces is gathered by signals collecting assembly 2, and the signal Processing by signal processing module 3 can draw the magnetic field size that magnetic field induction assembly 1 is responded to.The magnetic field induction coil that the present invention adopts three " product " fonts to be provided with, comprise first coil 11, second coil 12, tertiary coil 13, the center line of described three coils is vertical mutually, and the center line of three coils constitutes the three-dimensional coordinate system, can measure the magnetic field of three direction inductors simultaneously.So just, reached the effect of when circumstance complication, measuring the magnetic field of a plurality of directions simultaneously.
As shown in Figure 1 and Figure 2, preferred implementation of the present invention is that described first coil 11 is vertical coil, and described second coil 12 and described tertiary coil 13 are horizontal coil.That arranges like this that the main effect of coil is that vertical coil and horizontal coil just can be very compact is arranged in together, so just can reduce the space of coil.Adopt the coil of three this compact arrangement, can guarantee that the field signal of three directions being collected is the signal that is in the different directions of same position substantially, strengthen the accuracy of measuring.Described signal processing module 3 comprises signal calibration unit 31 and magnetic field treated unit 32, and described signal calibration unit 31 is used to calibrate experimental formula.The present invention illustrates the detailed process of measuring magnetic field with described first coil 11, because A is vertical coil, so described first coil 11 can be sensed the height pattern magnetic field of forming with described second coil, 12 center lines and described tertiary coil 13 center lines, can know according to Faradic electricity magnetic induction theorem, on described first coil 11, can produce an alternating electric field, be between the signal end of described first coil 11 and the common port ac voltage signal to be arranged, adopt assembly to gather this ac voltage signal by signal, so just finished the conversion of magnetic field to electric field.Signal calibration unit 31 in the described signal processing module 3 is calibrated the K among the experimental formula T=KV+B, B according to two-point method, wherein T represents magnetic induction density, V represents magnetic induction voltage, K, B are parameter, promptly, by 2 data that measure, know the value of two couples of T and B, obtain the value of K, B again according to this two couples value.Again the ac voltage signal that collects is handled, can be measured the size in magnetic field by experimental formula according to acquisition ac voltage signal stool and urine.
As Fig. 2, shown in Figure 3, in the preferred embodiment for the present invention, described signal processing module 3 comprises signal amplification unit 32, and the field signal that collects is amplified.Described signal amplification unit 32 comprises first signal amplification unit 321 that amplifies the field signal of gathering and the secondary signal amplifying unit 322 that amplifies described first signal amplification unit, 321 amplifying signals.Because the magnetic field of described magnetic induction assembly induction is all smaller under general environment, particularly in magnetic field when more weak, the alternating voltage that described magnetic induction assembly induction produces is very little, the described signal that collects is generally also more weak, therefore, by with amplifying of being gathered than weak signal, just can carry out follow-up signal better and handle, make measurement more accurate.As shown in Figure 3, signal is amplified by first signal amplification unit 321, this just simply amplifies the original signal of gathering, amplify again by 322 pairs of described first signal amplification unit, 321 amplifying signals of secondary signal amplifying unit again, described second level signal amplification process comprises gear selection and signal filtering, and the signal after amplifying like this is just more accurate.
As Fig. 1, shown in Figure 4, the invention provides a kind of method of measuring magnetic field, comprise the steps:
Pass through above-mentioned steps, just can induce a certain size alternating voltage when having alternating magnetic fields to exist in the magnetic induction coil by electromagnetic induction, the alternating voltage that produces is gathered by signals collecting assembly 2, and the signal Processing by signal processing module 3 can draw the magnetic field size that magnetic field induction assembly 1 is responded to.The magnetic field induction coil that the present invention adopts three " product " fonts to be provided with, comprise first coil 11, second coil 12, tertiary coil 13, the center line of described three coils is vertical mutually, and the center line of three coils constitutes the three-dimensional coordinate system, can measure the magnetic field of three direction inductors simultaneously.So just, reached the effect of when circumstance complication, measuring the magnetic field of a plurality of directions simultaneously.
As Fig. 1, shown in Figure 5, in the preferred implementation of the present invention, described C step process field signal also comprises the magnetic field correction step, promptly by the numerical value of two point measurements to formula T=KV+B in two parameters of K, B proofread and correct.Signal calibration unit 31 in the described signal processing module 3 is calibrated the K among the experimental formula T=KV+B, B according to two-point method,, by 2 data that measure, knows the value of two couples of T and B that is, obtains the value of K, B again according to this two couples value.Again the ac voltage signal that collects is handled, can be measured the size in magnetic field by experimental formula according to acquisition ac voltage signal stool and urine.
As Fig. 3, shown in Figure 5, in the preferred implementation of the present invention, in described C step process field signal process, comprise the field signal amplification process.Described field signal amplification process comprises that the first order of field signal is amplified and amplify the second level.Because the magnetic field of described magnetic induction assembly induction is all smaller under general environment, particularly in magnetic field when more weak, the alternating voltage that described magnetic induction assembly induction produces is very little, the described signal that collects is generally also more weak, therefore, by with amplifying of being gathered than weak signal, just can carry out follow-up signal better and handle, make measurement more accurate.As shown in Figure 3, signal is amplified by first signal amplification unit 321, this just simply amplifies the original signal of gathering, amplify again by 322 pairs of described first signal amplification unit, 321 amplifying signals of secondary signal amplifying unit again, described second level signal amplification process comprises gear selection and signal filtering, and the signal after amplifying like this is just more accurate.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. magnetic field measurement system, comprise: the magnetic field induction assembly of measuring magnetic field, the signals collecting assembly that the field signal of magnetic field induction assembly induction is gathered, the signal processing module that the signal of described signals collecting assembly collection is handled, it is characterized in that, described magnetic field induction assembly comprises first coil, second coil, tertiary coil, described first coil, second coil, tertiary coil becomes the center line of " product " font and three coils to place mutual vertically, described first coil, second coil and tertiary coil are connected to a common port, and described signals collecting assembly also comprises the first signals collecting assembly of corresponding with described coil respectively connection, the secondary signal acquisition component, the 3rd signals collecting assembly.
2. magnetic field measurement system according to claim 1 is characterized in that, described first coil is vertical coil, and described second coil and described tertiary coil are horizontal coil.
3. magnetic field measurement system according to claim 1 is characterized in that described signal processing module comprises signal calibration unit and signal processing unit.
4. magnetic field measurement system according to claim 1, it is characterized in that, also comprise the magnetic field correction unit, described magnetic field correction unit by the numerical value of two point measurements to formula T=KV+B in two parameters of K, B proofread and correct, wherein T represents magnetic induction density, V represents magnetic induction voltage, and K, B are parameter.
5. magnetic field measurement system according to claim 1 is characterized in that described signal processing module comprises signal amplification unit, and the field signal that collects is amplified.
6. magnetic field measurement system according to claim 5 is characterized in that, described signal amplification unit comprises first signal amplification unit that amplifies the field signal of gathering and the secondary signal amplifying unit that amplifies the described first signal amplification unit amplifying signal.
7. an application rights requires 1 magnetic field measurement system to measure the method in magnetic field, comprises the steps:
The magnetic-field measurement assembly is set: become the center line of " product " font and three coils to place mutual vertically described first coil, second coil, tertiary coil, the described first signals collecting assembly, secondary signal acquisition component and the 3rd signals collecting assembly difference correspondence are connected with corresponding coil, the signals collecting assembly is connected with signal processing module;
Gather field signal: described signals collecting assembly is gathered the field signal of corresponding field coil respectively simultaneously;
Handle field signal: handle by signal processing module and gather the field signal that the field signal step is gathered.
8. according to the method in the described measurement of claim 7 magnetic field, it is characterized in that described processing field signal step process field signal comprises the field signal amplification process.
9. the method in described according to Claim 8 measurement magnetic field is characterized in that, described field signal amplification process comprises that the first order of field signal is amplified and amplify the second level.
10. according to the method in the described measurement of claim 7 magnetic field, it is characterized in that described processing field signal step process field signal also comprises the magnetic field correction step, promptly by the numerical value of two point measurements to formula T=KV+B in two parameters of K, B proofread and correct.
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| CNA2009103025457A CN101566676A (en) | 2009-05-22 | 2009-05-22 | Magnetic field measurement system and method for measuring magnetic field |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288925A (en) * | 2011-07-07 | 2011-12-21 | 贵州大学 | Three-dimensional pulse magnetic field measurement method |
| CN102495381A (en) * | 2011-12-18 | 2012-06-13 | 河海大学常州校区 | Induction type electromagnetic leakage detection device and method |
| CN102539938A (en) * | 2011-10-21 | 2012-07-04 | 中华人民共和国常州出入境检验检疫局 | Electromagnetic leakage detecting system |
| CN102590764A (en) * | 2012-03-02 | 2012-07-18 | 中国医学科学院生物医学工程研究所 | MHz pulse weak magnetic field detection experimental system and signal processing system |
| CN103760503A (en) * | 2014-02-10 | 2014-04-30 | 清华大学 | Method and system for measuring alternating magnetic field direction |
| CN105242222A (en) * | 2015-09-11 | 2016-01-13 | 合肥联宝信息技术有限公司 | Method for measuring magnetic field radiation and magnetic field probe |
| CN110441716A (en) * | 2019-07-04 | 2019-11-12 | 北京航空航天大学 | Low frequency magnetic field measuring device |
-
2009
- 2009-05-22 CN CNA2009103025457A patent/CN101566676A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288925A (en) * | 2011-07-07 | 2011-12-21 | 贵州大学 | Three-dimensional pulse magnetic field measurement method |
| CN102539938A (en) * | 2011-10-21 | 2012-07-04 | 中华人民共和国常州出入境检验检疫局 | Electromagnetic leakage detecting system |
| CN102495381A (en) * | 2011-12-18 | 2012-06-13 | 河海大学常州校区 | Induction type electromagnetic leakage detection device and method |
| CN102590764A (en) * | 2012-03-02 | 2012-07-18 | 中国医学科学院生物医学工程研究所 | MHz pulse weak magnetic field detection experimental system and signal processing system |
| CN103760503A (en) * | 2014-02-10 | 2014-04-30 | 清华大学 | Method and system for measuring alternating magnetic field direction |
| CN103760503B (en) * | 2014-02-10 | 2016-08-17 | 清华大学 | alternating magnetic field direction measurement method and system |
| CN105242222A (en) * | 2015-09-11 | 2016-01-13 | 合肥联宝信息技术有限公司 | Method for measuring magnetic field radiation and magnetic field probe |
| CN110441716A (en) * | 2019-07-04 | 2019-11-12 | 北京航空航天大学 | Low frequency magnetic field measuring device |
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Application publication date: 20091028 |