CN106249303A - A kind of metal detector with near field communication (NFC) function and extension storage function - Google Patents
A kind of metal detector with near field communication (NFC) function and extension storage function Download PDFInfo
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- CN106249303A CN106249303A CN201610558016.3A CN201610558016A CN106249303A CN 106249303 A CN106249303 A CN 106249303A CN 201610558016 A CN201610558016 A CN 201610558016A CN 106249303 A CN106249303 A CN 106249303A
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- circuit
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- metal detector
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- 239000002184 metal Substances 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 title claims abstract description 25
- 230000007547 defect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Alarm Systems (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a kind of metal detector with near field communication (NFC) function and extension storage function, coil oscillating circuit, near-field communication module, warning circuit and control circuit, in described coil oscillating circuit, multi-resonant oscillating circuit, amplifying circuit and search coil are sequentially connected with, described control circuit includes that linear hall element, amplifying circuit, peak-detector circuit, A/D change-over circuit and single-chip microcomputer are sequentially connected with, and described near-field communication module, warning circuit are connected with control circuit respectively.Such that it is able to overcome detector price and costliness thereof in prior art；Domestic traditional metal detector then utilizes analog circuit detect and control, its circuit is complicated, detectivity is low, and whole system is easily by external interference, overcome metal detector in prior art not possess near field communication (NFC) function and storage function simultaneously, cause the defect that the statistics of warning message cannot complete.
Description
Technical field
The present invention relates to metal detection technical field, in particular it relates to one has near field communication (NFC) function and extension storage
The metal detector of function.
Background technology
Metal detector is as a kind of most important Security Inspection Equipments, and oneself is widely used in social life and industry
The numerous areas produced.Such as on airport, megaevent (such as the Olympic Games), exhibition etc. all come passing with metal detector
Personnel carry out safety detection, to investigate the violated metal objects of nocuity such as cutter that luggage, parcel and human body carry secretly, gun, ammunition
Product；Industrial department (including that wrist-watch, glasses, jewel, electronics etc. produce the factory containing metal product) also uses metal to visit
Survey device discrepancy personnel to be detected, to prevent the loss of precious metal material；At present, even examination also begins to enable metal spy
Surveying device prevents examinee from utilizing the instruments such as mobile phone to practise fraud.
As can be seen here, commercial production and personal safety are played an important role by metal detector.And in order to accurately
Judge the position that metal is concealed, it is necessary to metal detector has higher sensitivity.Simultaneously sometimes for by alarm signal
Breath sends relevant persons in charge to, warning message is carried out record, at present.Although the most perfect the most existing series product
Product, but price and costliness thereof；Domestic traditional metal detector then utilizes analog circuit detect and control, its circuit
Complexity, detectivity is low, and whole system is easily by external interference, simultaneously the metal detector of prior art do not possess near field lead to
Telecommunication function, causes the statistics of warning message to complete.
Summary of the invention
It is an object of the invention to, for the problems referred to above, propose one and there is near field communication (NFC) function and extension storage function
Metal detector, with realize improve detection accuracy, it is achieved record warning message advantage.
For achieving the above object, the technical solution used in the present invention is: one has near field communication (NFC) function and extension storage
The metal detector of function, specifically includes that coil oscillating circuit, near-field communication module, extension storage module, warning circuit and control
Circuit processed, in described coil oscillating circuit, multi-resonant oscillating circuit, amplifying circuit and search coil are sequentially connected with, described control circuit
Being sequentially connected with including linear hall element, amplifying circuit, peak-detector circuit, A/D change-over circuit and single-chip microcomputer, described near field leads to
Letter module, warning circuit are connected with control circuit respectively, the warning message of described extension storage module stores warning circuit.
Further, described coil oscillating circuit, specifically, 555 intervalometers constitute a multivibrator, produces pulse
Signal, is input to the base stage of audion from the positive pulse signal of multivibrator output after audion amplifies through electric capacity, shape
Become the pulse signal that frequency stability is high, power is bigger, and pulse signal is input in search coil, produce wink in coil
Between stronger electric current, thus around coil, produce constant alternating magnetic field.
Further, the pulse signal frequency that multivibrator produces is 24KHz, and dutycycle is 2/3.
Further, described amplifying circuit includes operational amplifier LM324.
Various embodiments of the present invention, owing to specifically including that coil oscillating circuit, near-field communication module, warning circuit and control
Circuit processed, in described coil oscillating circuit, multi-resonant oscillating circuit, amplifying circuit and search coil are sequentially connected with, described control circuit
Being sequentially connected with including linear hall element, amplifying circuit, peak-detector circuit, A/D change-over circuit and single-chip microcomputer, described near field leads to
Letter module, warning circuit are connected with control circuit respectively.Such that it is able to overcome detector price and costliness thereof in prior art；State
Interior traditional metal detector then utilizes analog circuit detect and control, and its circuit is complicated, and detectivity is low, and
Whole system, easily by external interference, overcomes metal detector in prior art not possess near field communication (NFC) function simultaneously, causes reporting to the police
The defect that the statistics of information cannot complete.
Other features and advantages of the present invention will illustrate in the following description, and, partly become from description
Obtain it is clear that or understand by implementing the present invention.
Below by embodiment, technical scheme is described in further detail.
Detailed description of the invention
Hereinafter the preferred embodiments of the present invention are illustrated, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Specifically, a kind of metal detector with near field communication (NFC) function and extension storage function, specifically include that coil shakes
Swing circuit, near-field communication module, extension storage module, warning circuit and control circuit, multi-resonant in described coil oscillating circuit
Swinging circuit, amplifying circuit and search coil to be sequentially connected with, described control circuit includes linear hall element, amplifying circuit, peak value
Detecting circuit, A/D change-over circuit and single-chip microcomputer are sequentially connected with, described near-field communication module, warning circuit respectively with control circuit
Connect, the warning message of described extension storage module stores warning circuit.
Described coil oscillating circuit, specifically, 555 intervalometers constitute a multivibrator, produces pulse signal, from many
The positive pulse signal of harmonic oscillator output is input to the base stage of audion after audion amplifies through electric capacity, and forming frequency is stable
The pulse signal that degree is high, power is bigger, and pulse signal is input in search coil, the electricity that generation moment is stronger in coil
Stream, thus around coil, produce constant alternating magnetic field.
The pulse signal frequency that multivibrator produces is 24KHz, and dutycycle is 2/3.
Described amplifying circuit includes operational amplifier LM324.
Be made up of a multivibrator 555 intervalometers, producing frequency is 24KHz, and dutycycle is the pulse signal of 2/3.
The myriametric wave frequency selecting 24KHz is to weaken the soil impact on electromagnetic wave.From the positive pulse letter of multivibrator output
Number replace with 2N2222 in electric capacity C7 is input to base stage (Q1 is β >=the 9013H of the 125) figure of Q1 so that it is conducting, put through Q1
After great, it be the formation of the pulse signal that frequency stability is high, power is bigger and be input in search coil L1, produce in coil
The electric current that moment is stronger, so that producing constant alternating magnetic field around coil.
The amplitude of sine wave signal produced by oscillating circuit is smaller, it is therefore desirable to amplifies and just can locate again
Reason.In the design, signal amplification circuit uses the integrated operational amplifier that input impedance is high, drift is less, common mode rejection ratio is high
LM324.LM324 is four high guaily unit integrated circuit, and it uses 14 foot dual-in-line Plastic Package.It is complete that its inside comprises four groups of forms
Exactly the same operational amplifier, except power supply is common, four groups of amplifiers are separate.
Warning message is sent to mobile phone or the flat board with wireless communication function by near-field communication module, and is responsible for by relevant
Personnel record, when surrounding does not possess the condition of near field communication (NFC) function, warning message can be stored by extension storage module, to wait to lead
Go out to use.
At least can reach following beneficial effect: overcome detector price and costliness thereof in prior art；Domestic traditional
Metal detector then utilizes analog circuit detect and control, and its circuit is complicated, and detectivity is low, and whole system
Easily by external interference, the metal detector of prior art does not possess near field communication (NFC) function simultaneously, causes the statistics nothing of warning message
Method completes.
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention,
Although being described in detail the present invention with reference to previous embodiment, for a person skilled in the art, it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (4)
1. a metal detector with near field communication (NFC) function and extension storage function, it is characterised in that include that coil vibrates
Circuit, near-field communication module, extension storage module, warning circuit and control circuit, multi-harmonic-oscillations in described coil oscillating circuit
Circuit, amplifying circuit and search coil are sequentially connected with, and described control circuit includes that linear hall element, amplifying circuit, peak value are examined
Wave circuit, A/D change-over circuit and single-chip microcomputer are sequentially connected with, and described near-field communication module, warning circuit are respectively with control circuit even
Connect, the warning message of described extension storage module stores warning circuit.
The metal detector with near field communication (NFC) function and extension storage function the most according to claim 1, its feature exists
In, described coil oscillating circuit, specifically, 555 intervalometers constitute a multivibrator, produces pulse signal, from multi-harmonic-oscillations
The positive pulse signal of device output is input to the base stage of audion after audion amplifies through electric capacity, forming frequency degree of stability is high,
The pulse signal that power is bigger, and pulse signal is input in search coil, the electric current that generation moment is stronger in coil, from
And around coil, produce constant alternating magnetic field.
The metal detector with near field communication (NFC) function and extension storage function the most according to claim 2, its feature exists
In, the pulse signal frequency that multivibrator produces is 24KHz, and dutycycle is 2/3.
The metal detector with near field communication (NFC) function and extension storage function the most according to claim 3, its feature exists
In, described amplifying circuit includes operational amplifier LM324.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610558016.3A CN106249303A (en) | 2016-07-15 | 2016-07-15 | A kind of metal detector with near field communication (NFC) function and extension storage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610558016.3A CN106249303A (en) | 2016-07-15 | 2016-07-15 | A kind of metal detector with near field communication (NFC) function and extension storage function |
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| CN106249303A true CN106249303A (en) | 2016-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610558016.3A Pending CN106249303A (en) | 2016-07-15 | 2016-07-15 | A kind of metal detector with near field communication (NFC) function and extension storage function |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120028280A (en) * | 2010-09-14 | 2012-03-22 | 콤팔 일렉트로닉스 인코포레이션 | Electronic device and control method thereof |
| CN202614951U (en) * | 2012-06-21 | 2012-12-19 | 傅清河 | Metal detection device |
| CN203587817U (en) * | 2013-11-22 | 2014-05-07 | 南京信息工程大学 | Handheld digital metal detector |
| CN105005084A (en) * | 2015-08-11 | 2015-10-28 | 安徽远鸿机械自动化有限公司 | Method for detecting metal impurities in material |
| CN105527336A (en) * | 2014-10-22 | 2016-04-27 | 陕西同力电气有限公司 | Metal detector |
-
2016
- 2016-07-15 CN CN201610558016.3A patent/CN106249303A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120028280A (en) * | 2010-09-14 | 2012-03-22 | 콤팔 일렉트로닉스 인코포레이션 | Electronic device and control method thereof |
| CN202614951U (en) * | 2012-06-21 | 2012-12-19 | 傅清河 | Metal detection device |
| CN203587817U (en) * | 2013-11-22 | 2014-05-07 | 南京信息工程大学 | Handheld digital metal detector |
| CN105527336A (en) * | 2014-10-22 | 2016-04-27 | 陕西同力电气有限公司 | Metal detector |
| CN105005084A (en) * | 2015-08-11 | 2015-10-28 | 安徽远鸿机械自动化有限公司 | Method for detecting metal impurities in material |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 545006 No. 20, No. 2, 2 District, E, district 102, new Liu Road, Liuzhou, the Guangxi Zhuang Autonomous Region. Applicant after: LIUZHOU GUOTAO TECHNOLOGY CO., LTD. Address before: 545005 No. 1, unit 1, Kim Du Hui, 16 Tan Zhong Xi Road, Liuzhou, the Guangxi Zhuang Autonomous Region, No. 5-13 Applicant before: LIUZHOU GUOTAO TECHNOLOGY CO., LTD. |
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Application publication date: 20161221 |