CN106645986A - Handheld device for automatically detecting field intensity - Google Patents
Handheld device for automatically detecting field intensity Download PDFInfo
- Publication number
- CN106645986A CN106645986A CN201611076877.4A CN201611076877A CN106645986A CN 106645986 A CN106645986 A CN 106645986A CN 201611076877 A CN201611076877 A CN 201611076877A CN 106645986 A CN106645986 A CN 106645986A
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- CN
- China
- Prior art keywords
- measurement
- field intensity
- handheld device
- mcu
- measuring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Recording Measured Values (AREA)
Abstract
The invention relates to the field of test and verification, and discloses a field intensity measuring device which is applied to measuring the field intensity of a non-contact card reader. The device has three measurement functions such as field intensity measurement, distance measurement and carrier frequency measurement, can store a measurement result in an off-line manner, and supports query for the measurement result. Being a handheld measuring device, the field intensity measuring device can be applied to different measurement scenes. Compared with a traditional method of measuring the field intensity by using an oscilloscope, the handheld device is high in portability, high in reliability and high in precision.
Description
Technical field
The present invention relates to test checking field, a kind of handheld device of non-contact detecting field intensity is proposed.
Background technology
Traditional measurement field intensity method is the peak value in oscillograph read voltage waveform, according to peak computational field intensity, and is used
Slide calliper rule measure measurement position to reader surface in distance.Traditional method measuring result error is larger, and equipment instrument is big,
It is not readily portable.Field intensity is measured using the handheld device of automatic detection field intensity, using MCU the voltage letter of high-precision AD collection is processed
Field intensity value number is obtained, infrared sensor measurement distance, the little reliability of measuring result error is high, and equipment is easy to carry.
The content of the invention
It is an object of the invention to provide a kind of non-handheld device for connecing card reader field intensity of automatic measurement, while this hand-held sets
Standby to measure field intensity, measurement distance measures the frequency of carrier wave, inquires about the function of measurement result.
Handheld device of the present invention has the function of measurement field intensity, as shown in figure 1, measurement field intensity functional module is by peak
Value detection circuit, high-precision AD chip, MCU compositions.When by described handheld device be put into it is non-connect card reader field when, peak value inspection
The coupling coil sensing of slowdown monitoring circuit obtains sine wave, and there is mathematics to close for the peak value and handheld device point field intensity of the sine wave
System, therefore by the way that by this sine wave rectifying and wave-filtering, peak detection circuit is output as the peak value rectification level of sine wave, the rectified current
Flat to be converted to data signal by AD collections, MCU is calculated institute's measuring point field intensity value using this data signal.
Handheld device of the present invention has distance measurement function, can accurately measure handheld device and connect reader surface to non-
Distance, sensitivity is high, can reach 1mm, compared with demarcating using scale, fast, accurately.As shown in figure 1, distance measurement function mould
Block is by range sensor, AD conversion chip, MCU compositions.It is defeated through AD samplings that distance is converted to analog voltage by range sensor
Go out to MCU, MCU is calculated using the digital voltage of sampling and obtained distance value.
Handheld device of the present invention has the function that carrier frequency is measured, as shown in figure 1, carrier frequency measurement module
By carrier wave coil, amplitude limiter circuit, MCU compositions.The coil-induced voltage of carrier wave is sine wave, and the voltage waveform is through amplitude limiter circuit
It is changed into square wave, then square wave is counted using in the input capture functional unit time of MCU, the number of square wave is to survey in 1S
The frequency of loading gage ripple.
Handheld device of the present invention has two kinds of field strength measurement pattern single triggering storages and continuous trigger storage, single
Secondary triggering memory module is that the distance shown by OLED is determined behind display location, completes field strength measurement by one-shot measurement button and deposits
Storage, and it is displayed in OLED display screen；Continuous trigger storage is applied to the field strength measurement storage of a segment distance, it is determined that starting to measure position
Postpone, press measurement button, handheld device is moved on into end position, measurement is pressed again and buttons to end measurement, single-chip microcomputer can be certainly
It is dynamic to measure the segment distance specific interval field intensity and store.
Handheld device of the present invention has the function that measurement result is inquired about, and single-chip microcomputer is by different card reader field strength measurements
As a result offline storage, by selecting different card reader, inquires about measurement result, in the handheld device, inhomogeneity in Flash
Type card reader is distinguished by Reader1, Reader2 etc..
Description of the drawings
Fig. 1 represents the structured flowchart of the device of the present invention.
Fig. 2 represents the structural representation of the device of the present invention.
Specific embodiment
In the following detailed description, reference is described by way of diagram.The embodiment is described in sufficient detail, with
Those skilled in the art is enabled to implement the present invention.But the following detailed description should not be construed limited significance.
Handheld device of the present invention shows automatic field intensity meter in the start page, and page layout switch is to selection page after 25 seconds
Face, including field intensity range measurement, carrier wave range measurement, three options of Query Result translate into selected option by above turning down, and press
Lower acknowledgement key is selected.
Field intensity range measurement is selected, into field intensity distance measuring mode the page, including single triggering measurement are selected, it is continuous to touch
Measurement option is sent out, by above turning down selection measurement pattern, acknowledgement key is selected.When measuring into single triggering, selected with button
After selecting the card reader of measurement, acknowledgement key is pressed.OLED is divided to two row display distance, field intensity, distance to be displayed in real time on OLED screen curtain,
When needing to measure the field intensity of a certain distance, mobile hand-held device, when OLED distance show menu at for this apart from when, stop move
It is dynamic, and confirmation button is pressed, OLED shows the result of measurement, and single-chip microcomputer has been stored the result into Flash.Press return
Key carries out the storage measurement of single triggering next time.Return button is pressed again, returns the page of field intensity model selection.
When enter select continuous measurement when, selected after the card reader of measurement, to press acknowledgement key with button.OLED show away from
From the row of field intensity two, distance display in real time when needing to measure field intensity in a certain segment distance, moves to starting position and presses
Acknowledgement key, then in mobile hand-held device to end position, presses again acknowledgement key, and continuous measurement terminates.The OLED pages show
The field intensity of end position, distance.And this fragment position is stored in Flash in measurement result.Pressing return key is carried out next time
Measurement.When return button is pressed again, the page of field intensity model selection is returned.
Carrier frequency measurement, the incoming carrier measurement page is selected to be selected after the card reader of measurement, to press acknowledgement key with button
Afterwards.OLED display distance, the row of carrier wave two, distance display in real time presses confirmation button in measurement position, and OLED shows the subcarrier
Frequency.Press return key to be measured next time, return key is pressed again and returns field intensity, carrier wave, the Query Result page.
Into inquiry menu, select to need inquiry in reader, confirm to select, data with (distance, field intensity), (distance, frequency
Rate) it is displayed on OLED, inquire about each surveying record by button is above turned down.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (6)
1. a kind of handheld device of automatic detection field intensity, is applied to that measurement is non-to connect card reader field intensity, it is characterised in that equipment tool
There are field strength measurement, range measurement, carrier frequency measures three measurement functions；Wherein measuring field intensity includes single triggering storage and connects
Two kinds of measurement patterns of continuous triggering storage；Support the inquiry of measurement result.
2. device as claimed in claim 1, its feature can complete field strength measurement function in the handheld device, with field intensity
Measuring circuit module, by peak-detector circuit, 16 high-precision AD chips, MCU is constituted the circuit module.
3. device as claimed in claim 1, it is characterised in that the handheld device can complete the function of range measurement, have
Distance measuring circuit module, the circuit module is by range sensor, AD conversion chip, MCU compositions.
4. device as claimed in claim 1, it is characterised in that can complete carrier frequency measurement function, surveys with carrier frequency
Amount circuit module, the module is by carrier wave coil, amplitude limiter circuit, MCU compositions；Using the input capture function of MCU, carrier frequency is measured
Rate, and shown by OLED.
5. field strength measuring module according to claim 2, it is characterised in that the field intensity pattern of measurement includes that single triggering is deposited
Storage and continuous trigger store two kinds.
6. device as claimed in claim 1, it is characterised in that can be looked under query pattern by measurement result query pattern
Ask measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611076877.4A CN106645986A (en) | 2016-11-29 | 2016-11-29 | Handheld device for automatically detecting field intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611076877.4A CN106645986A (en) | 2016-11-29 | 2016-11-29 | Handheld device for automatically detecting field intensity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106645986A true CN106645986A (en) | 2017-05-10 |
Family
ID=58813448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611076877.4A Pending CN106645986A (en) | 2016-11-29 | 2016-11-29 | Handheld device for automatically detecting field intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106645986A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11118855A (en) * | 1997-10-20 | 1999-04-30 | Nissan Motor Co Ltd | Field-strength measuring device |
| EP1275968A1 (en) * | 2001-07-12 | 2003-01-15 | Bouygues Telecom | Portable device for measuring and analysing the ambient electromagnetic field |
| CN101110099A (en) * | 2006-07-17 | 2008-01-23 | 信息产业部电子工业标准化研究所 | Detecting method used for second generation resident identification card and equipment thereof |
| CN203037750U (en) * | 2012-12-06 | 2013-07-03 | 陕县电业局 | Transformer substation electrified area portable alarm |
| CN203287438U (en) * | 2013-05-10 | 2013-11-13 | 深圳市安鑫宝新环保技术有限公司 | Handheld-type field intensity indicator |
| CN203479338U (en) * | 2013-10-21 | 2014-03-12 | 国家电网公司 | Noise and electromagnetic field synchronous detection system of electric power equipment |
-
2016
- 2016-11-29 CN CN201611076877.4A patent/CN106645986A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11118855A (en) * | 1997-10-20 | 1999-04-30 | Nissan Motor Co Ltd | Field-strength measuring device |
| EP1275968A1 (en) * | 2001-07-12 | 2003-01-15 | Bouygues Telecom | Portable device for measuring and analysing the ambient electromagnetic field |
| CN101110099A (en) * | 2006-07-17 | 2008-01-23 | 信息产业部电子工业标准化研究所 | Detecting method used for second generation resident identification card and equipment thereof |
| CN203037750U (en) * | 2012-12-06 | 2013-07-03 | 陕县电业局 | Transformer substation electrified area portable alarm |
| CN203287438U (en) * | 2013-05-10 | 2013-11-13 | 深圳市安鑫宝新环保技术有限公司 | Handheld-type field intensity indicator |
| CN203479338U (en) * | 2013-10-21 | 2014-03-12 | 国家电网公司 | Noise and electromagnetic field synchronous detection system of electric power equipment |
Non-Patent Citations (1)
| Title |
|---|
| 李鉴增: "《有线电视综合信息网技术》", 31 July 1999, 人民邮电出版社 * |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |
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| WD01 | Invention patent application deemed withdrawn after publication |