CN205333744U - Space plane electromagnetism field intensity tester based on huge magneto resistor - Google Patents
Space plane electromagnetism field intensity tester based on huge magneto resistor Download PDFInfo
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- CN205333744U CN205333744U CN201620035648.7U CN201620035648U CN205333744U CN 205333744 U CN205333744 U CN 205333744U CN 201620035648 U CN201620035648 U CN 201620035648U CN 205333744 U CN205333744 U CN 205333744U
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Abstract
The utility model relates to a space plane electromagnetism field intensity tester based on huge magneto resistor, include: host system, signal acquisition module, signal amplification module, analog -to -digital conversion module, button input module, display module, alarm module, host system includes DSP digital signal processing chip, the signal acquisition module includes huge magneto resistor, the signal amplification module includes the high -speed operational amplifier circuit of AD828AN, analog -to -digital conversion module includes PCF8591 analog to digital conversion circuit, button input module includes that electric field magnetic field remote selection switch, maximum value keep the button, the display module includes the LCD1602 LCD screen, alarm module includes alarm, pilot lamp. The utility model discloses the realization is measured the true efficient of space plane electromagnetism field intensity rapidogen, and equipment structure is simple, low cost, and the stable performance, anti dryness is strong, can realize having LCD digital display and alarming function simultaneously to electric field strength, magnetic field intensity's switching and peak holding.
Description
Technical field
This utility model relates to electromagnetic surveying equipment technical field, is specially a kind of space plane electromagnetic field intensity tester based on giant magnetoresistance。
Background technology
We life free space in there is substantial amounts of electromagnetic field, they can superposition, reflection, refraction, penetrate object, even human body。Being there is threat by electromagnetic wave in health, it is possible to brings out various cancer, leukemia, cause that deformity occurs baby。But external electromagnetic field be cannot see and be can not touch, we more can not know its intensity according to subjective sensation, and it hides with us just as a stealthy killer, and our health is threatened。Therefore it is very necessary for carrying out testing for electromagnetic intensity in space, and its human-body safety value of national regulation is 833.3 milligauss。Current electromagnetic field intensity test instrunment adopts dedicated magnetic Field probe and electric field probe mostly, and such as inductance coil etc., while certainty of measurement is relatively low, price is also sufficiently expensive, and cost performance is not high。
Utility model content
This utility model purpose is to provide a kind of space plane electromagnetic field intensity tester based on giant magnetoresistance, to solve, most of electromagnetism intensity tester accuracy and sensitivity are not high enough in the market, numerical monitor can not be carried out, structure is complicated, the problem being susceptible to fault, this device is using DSP digital signal processing chip as controlling kernel, using the giant magnetoresistance that electromagnetic field is extremely sensitive as signal acquisition module, radiant intensity in environment is quick and precisely measured efficiently, digital-scroll technique can be carried out simultaneously, and send corresponding alarm sound by alarm。
For reaching above-mentioned purpose, this utility model solves its technical problem and be the technical scheme is that a kind of space plane electromagnetic field intensity tester based on giant magnetoresistance, including: main control module, signal acquisition module, signal amplification module, analog-to-digital conversion module, keyboard input module, display module, alarm module；Main control module includes DSP digital signal processing chip；Signal acquisition module includes giant magnetoresistance；Signal amplification module includes AD828AN high-speed computation amplifying circuit；Analog-to-digital conversion module includes PCF8591 analog to digital conversion circuit；Keyboard input module includes electric field magnetic field switching key, maximum keeps button；Display module includes LCD1602 liquid crystal display screen；Alarm module includes alarm, display lamp。Signal acquisition module and signal amplification module are electrical connections；Signal amplification module and analog-to-digital conversion module are electrical connections；Analog-to-digital conversion module and DSP are electrical connections；Display module and DSP are electrical connections；Electric field magnetic field switching key, maximum keep button and DSP to be electrical connections；Alarm, display lamp and DSP are electrical connections。
Described DSP digital signal processing chip is responsible for receiving PCF8591 analog to digital conversion circuit signal, according to relevant algorithm, magnetic field intensity and electric field intensity is converted, and calculates and control signal output。
It is strong that described giant magnetoresistance is responsible for measurement space Plane electromagnetic field, when electromagnetic radiation intensity is more big, the analog voltage of giant magnetoresistance module output is more high, magnetic material resistivity within giant magnetoresistance difference when having external magnetic field and not having external magnetic field is very big, and faint magnetic field can effectively be measured by it。
Described AD828AN high-speed computation amplifying circuit is responsible for the analog voltage signal of giant magnetoresistance output is amplified, the too low fast-changing weak voltage signals being not easy to process is carried out linear amplification at a high speed, in order to the subsequent treatment of analog-to-digital conversion module and chip。
Described PCF8591 analog to digital conversion circuit is responsible for the voltage signal after operation amplifier is carried out analog digital conversion, the voltage signal of simulation is converted to digital signal, is beneficial to process and the computing of dsp chip。
Described electric field magnetic field switching key is responsible for electric field measurement pattern and magnetic-field measurement pattern are switched over, and maximum keeps button that LCD liquid crystal display screen can be made to keep the maximum of the electric field intensity measured by display and magnetic field intensity。
Described LCD1602 liquid crystal display screen is responsible for the data such as measured space plane electromagnetic field intensity are shown in real time, show value is the ten's digit amount of the International System of Units, magnetic field size and electric field level can be shown respectively, it is also possible to keep the maximum showing surveyed field intensity。
Described alarm is responsible for send corresponding warning and prompt tone when surveyed field intensity is beyond normal range, and display lamp makes blinking action of reporting to the police accordingly simultaneously。
This utility model carrys out the intensity of measurement space Plane electromagnetic field by giant magnetoresistance, and giant magnetoresistance can sense the voltage exporting a certain size in the middle of radiation environment；The phenomenon that the resistance of material changes under the influence of a magnetic field, it is called magnetoresistance, general magnetic metal and alloy material have this character, but small change only can be there is in resistivity, the magnetoresistance of giant magnetoresistance is fairly obvious, change in resistance is more than ten times of common material, therefore, utilizes this character of giant magnetoresistance can accurately detect the change of spatial electromagnetic field intensity。The size of giant magnetoresistance output voltage is proportional with tested field intensity size, and tested field intensity is more strong, and output voltage is more high。First the output voltage of giant magnetoresistance carries out linear amplification through AD828AN high-speed computation amplifying circuit, signal after amplification is fed to PCF8591 analog to digital conversion circuit, and the analog voltage of input is converted to the treatable digital signal of processor by analog to digital conversion circuit in time；DSP carries out corresponding calculation process after receiving digital signal, be responsible for electric-field strength and magnetic field strong between conversion, and digital quantity is processed into the data that can show on LCD, then as needed in LCD liquid crystal display screen demonstrates electric field intensity or magnetic field intensity；Electric field magnetic field switching key is capable of electric field measurement pattern and the switching of magnetic-field measurement pattern, DSP completes the data between electric field, magnetic field according to selected pattern and converts and output services, and maximum keeps button that LCD1602 liquid crystal display screen can be made to keep the maximum of measured electric field intensity and magnetic field intensity in fixing display a period of time；After electromagnetic radiation intensity exceedes the Environmental security value of regulation, DSP can send signal immediately and make alarm sounding alarm, and display lamp glimmers, and people are reminded。
The utility model has the advantages that: realize faint space plane electromagnetic field intensity quick and precisely and is efficiently measured, whole tester volume is very small and exquisite, it is easy to carry with, adopt and detect sensor efficiently, measurement result is accurately reliable, and device structure is simple, with low cost, stable performance, dry resistance is strong；The measurement to electric field intensity and magnetic field intensity can be realized respectively, and carry out numerical monitor by LCD screen, and can carry out peak value keeping display；Solve existing test equipment precision inadequate, react slower, it is impossible to carry out the problem that exact numerical shows。Electromagnetic radiation in living environment or working space accurately and efficiently can be measured, enable people to away from electromagnetic radiation, it is to avoid radiation injury。
Accompanying drawing explanation
Accompanying drawing 1 is structured flowchart of the present utility model；
Detailed description of the invention
Below according to accompanying drawing, this utility model is described in detail:
Structured flowchart is as it is shown in figure 1, portable multi-function electromagnetic field intensity tester, including main control module, signal acquisition module, signal amplification module, analog-to-digital conversion module, keyboard input module, display module, alarm module；Main control module includes DSP digital signal processing chip；Signal acquisition module includes giant magnetoresistance；Signal amplification module includes AD828AN high-speed computation amplifying circuit；Analog-to-digital conversion module includes PCF8591 analog to digital conversion circuit；Keyboard input module includes electric field magnetic field switching key, maximum keeps button；Display module includes LCD1602 liquid crystal display screen；Alarm module includes alarm, display lamp。Signal acquisition module and signal amplification module are electrical connections；Signal amplification module and analog-to-digital conversion module are electrical connections；Analog-to-digital conversion module and DSP are electrical connections；Display module and DSP are electrical connections；Electric field magnetic field switching key, maximum keep button and DSP to be electrical connections；Alarm, display lamp and DSP are electrical connections。This utility model carrys out the intensity of measurement space Plane electromagnetic field by giant magnetoresistance, and giant magnetoresistance can sense the voltage exporting a certain size in the middle of radiation environment；The phenomenon that the resistance of material changes under the influence of a magnetic field, it is called magnetoresistance, general magnetic metal and alloy material have this character, but small change only can be there is in resistivity, the magnetoresistance of giant magnetoresistance is fairly obvious, change in resistance is more than ten times of common material, therefore, utilizes this character of giant magnetoresistance can accurately detect the change of spatial electromagnetic field intensity。The size of giant magnetoresistance output voltage is proportional with tested field intensity size, and tested field intensity is more strong, and output voltage is more high。First the output voltage of giant magnetoresistance carries out linear amplification through AD828AN high-speed computation amplifying circuit, signal after amplification is fed to PCF8591 analog to digital conversion circuit, and the analog voltage of input is converted to the treatable digital signal of processor by analog to digital conversion circuit in time；DSP carries out corresponding calculation process after receiving digital signal, be responsible for electric-field strength and magnetic field strong between conversion, and digital quantity is processed into the data that can show on LCD, then as needed in LCD liquid crystal display screen demonstrates electric field intensity or magnetic field intensity；Electric field magnetic field switching key is capable of electric field measurement pattern and the switching of magnetic-field measurement pattern, DSP completes the data between electric field, magnetic field according to selected pattern and converts and output services, and maximum keeps button that LCD1602 liquid crystal display screen can be made to keep the maximum of measured electric field intensity and magnetic field intensity in fixing display a period of time；After electromagnetic radiation intensity exceedes the Environmental security value of regulation, DSP can send signal immediately and make alarm sounding alarm, and display lamp glimmers, and people are reminded。
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described。Any those familiar with the art is in the technical scope that this utility model discloses, and the simple change of the technical scheme that can become apparent to or equivalence are replaced and each fallen within protection domain of the present utility model。
Claims (1)
1. the space plane electromagnetic field intensity tester based on giant magnetoresistance, it is characterised in that including: main control module, signal acquisition module, signal amplification module, analog-to-digital conversion module, keyboard input module, display module, alarm module；Main control module includes DSP；Signal acquisition module includes giant magnetoresistance；Signal amplification module includes AD828AN high-speed computation amplifying circuit；Analog-to-digital conversion module includes PCF8591 analog to digital conversion circuit；Keyboard input module includes electric field magnetic field switching key, maximum keeps button；Display module includes LCD1602 liquid crystal display screen；Alarm module includes alarm, display lamp；Signal acquisition module and signal amplification module are electrical connections；Signal amplification module and analog-to-digital conversion module are electrical connections；Analog-to-digital conversion module and DSP are electrical connections；Display module and DSP are electrical connections；Electric field magnetic field switching key, maximum keep button and DSP to be electrical connections；Alarm, display lamp and DSP are electrical connections。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035648.7U CN205333744U (en) | 2016-01-13 | 2016-01-13 | Space plane electromagnetism field intensity tester based on huge magneto resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035648.7U CN205333744U (en) | 2016-01-13 | 2016-01-13 | Space plane electromagnetism field intensity tester based on huge magneto resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205333744U true CN205333744U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620035648.7U Expired - Fee Related CN205333744U (en) | 2016-01-13 | 2016-01-13 | Space plane electromagnetism field intensity tester based on huge magneto resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205333744U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426659A (en) * | 2019-07-15 | 2019-11-08 | 大唐东北电力试验研究院有限公司 | A kind of portable weak magnetic measurement system |
| CN113433493A (en) * | 2021-06-01 | 2021-09-24 | 中国科学院上海光学精密机械研究所 | Magnetic resistance element for measuring magnetic field intensity and measuring system thereof |
-
2016
- 2016-01-13 CN CN201620035648.7U patent/CN205333744U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426659A (en) * | 2019-07-15 | 2019-11-08 | 大唐东北电力试验研究院有限公司 | A kind of portable weak magnetic measurement system |
| CN113433493A (en) * | 2021-06-01 | 2021-09-24 | 中国科学院上海光学精密机械研究所 | Magnetic resistance element for measuring magnetic field intensity and measuring system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 Termination date: 20170113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |