CN2566280Y - Magnetic field measuring device - Google Patents
Magnetic field measuring device Download PDFInfo
- Publication number
- CN2566280Y CN2566280Y CN 02278541 CN02278541U CN2566280Y CN 2566280 Y CN2566280 Y CN 2566280Y CN 02278541 CN02278541 CN 02278541 CN 02278541 U CN02278541 U CN 02278541U CN 2566280 Y CN2566280 Y CN 2566280Y
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- China
- Prior art keywords
- magnetic field
- measuring device
- field measuring
- circuit
- signal
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Abstract
The utility model relates to a magnetic field measuring device, which comprises a signal collection part, a signal processing part, and a signal display part. A measuring probe is adopted by the signal collection part. The signal processing part is composed of a series resonance circuit, an amplifying circuit, a sampling and A/D converting circuit, and a single chip computer. The signal display part is an LED display circuit. A portable structure is adopted by the utility model to digitally display. The magnetic field measuring device has simple structure and low manufacturing cost. The magnetic field measuring device has the functions that a measuring range of the magnetic field measuring device is automatically switched, the maximum values of magnetic fields of each time interval are automatically stored, etc. The magnetic field measuring device can duly measure and display, and the magnetic field measuring device can enquire history datum. The magnetic field measuring device is convenient in use. Alternating magnetic fields which are within the range with height from one millimeter to one thousand millimeters and are spatially and optionally distributed can be measured by the magnetic field measuring device. The magnetic field measuring device is suitable for measuring and recording weak magnetic fields which are optionally distributed in spatial three dimensions.
Description
Technical field
The utility model relates to a kind of magnetic field measurement instrument.
Background technology
In the electric test technology, can run into the Weak magentic-field problem of signal detection.Aspect magnetic field detection, mainly contain following way at present: inductive electromagnetic method, magnetic-force method, magnetic saturation method, galvanomagnetic effect method, Pumping Magnetic Resonance Method, superconductivity effects method, magneto-optic effect method etc.The best result of existing exact instrument distinguishes that power is 1nT, and frequency response range is 2Hz-10kHz (" electrical measurement and instrument ", 1996.9,12～14), is present domestic advanced person's magnetic field tester.But in some practical application, this instrument is also improper.Main cause is that price is too high, complex structure, use inconvenience.
The utility model content
The utility model is exactly to provide a kind of simple in structure, magnetic field measurement instrument that cost is lower, easy to use at the problems referred to above.
The technical scheme that the utility model provides is: a kind of magnetic field measurement instrument, comprise the signals collecting part, signal processing and signal display part, signals collecting partly adopts measuring sonde, signal processing is by series resonant circuit, amplifying circuit, sampling and A/D change-over circuit, single-chip microcomputer is formed, the signal display part is the LED display circuit, the field signal that measuring sonde collects is through series resonant circuit filtering, after amplifying circuit amplifies, sending into single-chip microcomputer again after over-sampling and A/D conversion handles, store, the LED display circuit shows real-time measurement result and enquiry of historical data.
Above-mentioned measuring sonde is the inductive coil of space three-dimensional quadrature.
The utility model also is provided with the interrupt control circuit of control single chip computer.
The utility model adopts portable construction, and numeral shows that it is simple in structure, cost is low; Have automatic switching range, store the functions such as maximum value of magnetic field of day part automatically, can measure demonstration in real time, but also enquiry of historical data is easy to use.Energy measurement one milli high in the high scope of 1,000 millis, the alternating magnetic field that distributes arbitrarily of space.Be applicable to and measure and any low-intensity magnetic field that distributes of record space three-dimensional.
Description of drawings
Accompanying drawing is a circuit structure block diagram of the present utility model.
Embodiment
Referring to accompanying drawing, the utility model adopts electromagnetic induction principle, is measuring sonde 1 with the inductive coil of space three-dimensional quadrature, and the magnetic field that like this can measurement space distributes arbitrarily will be treated that measuring magnetic field is transformed to the light current that is directly proportional with it and presses signal, and be write down each component.The frequency content that probe 1 field signal that collects comprises is very abundant, for the field signal of the characteristic frequency that will measure, adopt series resonant circuit 2 to realize narrow-band filtering, for the lower field signal of frequency, adopt gyrator to produce big inductance, to satisfy condition of resonance.Signal to the single-frequency behind the resonance is amplified by amplifying circuit 3, and enlargement factor is regulated automatically according to the size of original signal, to realize the automatic switchover of range.Amplified analog signal by sampling and A/D change-over circuit 4 is sampled, A/D conversion, is sent into single-chip microcomputer 5 then and handled.In single-chip microcomputer 5, adopted filtering algorithm efficiently, eliminate noise and recovering signal, event memory on request.LCD display circuit 6 shows measurement result or data query, and exports measurement result by I/O interface circuit 8 to host computer.Interrupt control circuit 7 is the running status of control single chip computer 5 flexibly, comprises real-time measurement, data query etc.Power unit 9 adopts rechargeable battery, produces the direct voltage source that meets the electronic circuit job requirement.
Claims (3)
1. magnetic field measurement instrument, comprise signals collecting part, signal processing and signal display part, it is characterized in that: signals collecting partly adopts measuring sonde, signal processing is made up of series resonant circuit, amplifying circuit, sampling and A/D change-over circuit, single-chip microcomputer, the signal display part is the LED display circuit, the field signal that measuring sonde collects is after series resonant circuit filtering, amplifying circuit amplify, send into single-chip microcomputer again after over-sampling and A/D conversion and handle, store, the LED display circuit shows real-time measurement result and enquiry of historical data.
2. magnetic field measurement instrument according to claim 1 is characterized in that: measuring sonde is the inductive coil of space three-dimensional quadrature.
3. magnetic field measurement instrument according to claim 1 and 2 is characterized in that: the interrupt control circuit that is provided with control single chip computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278541 CN2566280Y (en) | 2002-07-30 | 2002-07-30 | Magnetic field measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278541 CN2566280Y (en) | 2002-07-30 | 2002-07-30 | Magnetic field measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2566280Y true CN2566280Y (en) | 2003-08-13 |
Family
ID=33741863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02278541 Expired - Fee Related CN2566280Y (en) | 2002-07-30 | 2002-07-30 | Magnetic field measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2566280Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495381A (en) * | 2011-12-18 | 2012-06-13 | 河海大学常州校区 | Induction type electromagnetic leakage detection device and method |
| CN102680800A (en) * | 2011-03-15 | 2012-09-19 | 深圳光启高等理工研究院 | Three-dimensional scanning system for magnetic fields |
| CN101641609B (en) * | 2007-03-23 | 2013-06-05 | 旭化成微电子株式会社 | Magnetic sensor and its sensitivity measuring method |
| CN103885001A (en) * | 2014-03-31 | 2014-06-25 | 哈尔滨工业大学深圳研究生院 | Series array type alternating current magnetic field sensing device |
| CN104299493A (en) * | 2014-10-29 | 2015-01-21 | 上海大学 | Electromagnetic field teaching and experiment system based on augmented reality |
| CN104299493B (en) * | 2014-10-29 | 2017-01-04 | 上海大学 | The teaching of a kind of electromagnetic field based on augmented reality and experimental system |
-
2002
- 2002-07-30 CN CN 02278541 patent/CN2566280Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101641609B (en) * | 2007-03-23 | 2013-06-05 | 旭化成微电子株式会社 | Magnetic sensor and its sensitivity measuring method |
| CN102680800A (en) * | 2011-03-15 | 2012-09-19 | 深圳光启高等理工研究院 | Three-dimensional scanning system for magnetic fields |
| CN102495381A (en) * | 2011-12-18 | 2012-06-13 | 河海大学常州校区 | Induction type electromagnetic leakage detection device and method |
| CN103885001A (en) * | 2014-03-31 | 2014-06-25 | 哈尔滨工业大学深圳研究生院 | Series array type alternating current magnetic field sensing device |
| CN103885001B (en) * | 2014-03-31 | 2016-08-17 | 哈尔滨工业大学深圳研究生院 | Serial array formula AC magnetic field sensing device |
| CN104299493A (en) * | 2014-10-29 | 2015-01-21 | 上海大学 | Electromagnetic field teaching and experiment system based on augmented reality |
| CN104299493B (en) * | 2014-10-29 | 2017-01-04 | 上海大学 | The teaching of a kind of electromagnetic field based on augmented reality and experimental system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |