CN103869306A - Metal and non-linear object composite detector - Google Patents
Metal and non-linear object composite detector Download PDFInfo
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- CN103869306A CN103869306A CN201210536389.2A CN201210536389A CN103869306A CN 103869306 A CN103869306 A CN 103869306A CN 201210536389 A CN201210536389 A CN 201210536389A CN 103869306 A CN103869306 A CN 103869306A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
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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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Abstract
The invention provides a metal and non-linear object composite detector which comprises a high frequency signal source, a radiofrequency emission unit, a first filter combination, a local oscillator unit, a frequency mixing unit, a second filter combination, an intermediate-frequency demodulation unit, a panel control module, an alarm output module, a signal processing and controlling unit, a sampling unit, an amplification unit, a low pass filter, a phase detector, a low frequency signal source, a low frequency emission unit, a preamplifier and a combined probe. According to the detector, a non-linear node harmonic wave detection technology is combined with a metal detection technology, a suspected object can be detected in a non-contact manner, both a metal object and a non-linear node object can be discovered, and the detector is capable of distinguishing the two kinds of objects, and can be applied to security inspection in places as airports, stations and conference areas as well as to technical inspections in special places which are used for diplomacy or secrecy of police, national security department, and the like.
Description
Technical field
The present invention relates to safety-security area, specifically, the present invention relates to a kind of composite detecting device for metal target and Nonlinear Parameter are carried out to contactless detection.
Background technology
China Patent No. is 200420114716.6, name is called in the patent documentation of " electronic target sniffer " and discloses a kind of Detection Techniques to nonlinear node target, but this technology only possesses the detectivity of Nonlinear Parameter, cannot survey homogeneity metal.Metal detector in the market has metal detection capability, but equal None-identified nonlinear node target.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of metal and Nonlinear Parameter composite detecting device, realizes the object of surveying and differentiate metal target and Nonlinear Parameter.
For solving the problems of the technologies described above, the invention provides a kind of metal and Nonlinear Parameter composite detecting device, comprising: high-frequency signal source, rf transmitter unit, the first filter bank, local oscillator unit, mixing unit, the second filter bank, intermediate frequency detection unit, panel control module, alarm output module, signal processing and control module, sampling unit, amplifying unit, low-pass filter, phase detector, low frequency signal source, low frequencies unit, prime amplifier and coupling probe;
Wherein, the end 1 that goes out of described high-frequency signal source enters to hold 1 to be connected with described rf transmitter unit, the end 2 that goes out of described rf transmitter unit is connected with the end 1 that enters of described the first filter bank, the end 2 that goes out of described the first filter bank is connected with the end 1 that enters of described coupling probe, the end 2 that goes out of described high-frequency signal source is connected with the end 1 that enters of described local oscillator unit, the end 2 that goes out of described local oscillator unit is connected with the end 1 that enters of described mixing unit, the end 2 that enters of described mixing unit is connected with the end 2 that goes out of described the second filter bank, the end 1 that enters of described the second filter bank is connected with the end 2 that goes out of described coupling probe, the end 3 that goes out of described mixing unit is connected with the end 1 that enters of described intermediate frequency detection unit, the end 2 that goes out of described intermediate frequency detection unit is connected with the end 2 that enters of described signal processing and control module, the end 3 that enters of described high-frequency signal source is connected with the end 1 that goes out of described signal processing and control module, described signal is processed and the end 3 that goes out of control module is connected with the end 1 that enters of described panel control module, described signal is processed and the end 4 that goes out of control module is connected with the end 1 that enters of described alarm output module, the end 1 that enters of described low frequency signal source is connected with the end 6 that goes out of described signal processing and control module, the end 2 that goes out of described low frequency signal source is connected with the end 1 that enters of described low frequencies unit, the end 2 that goes out of described low frequencies unit is connected with the end 3 that enters of described coupling probe, the end 4 that goes out of described coupling probe is connected with the end 2 that enters of described prime amplifier, the end 1 that goes out of described prime amplifier is connected with the end 2 that enters of described phase detector, the end 1 that goes out of described phase detector is connected with the end 2 that enters of described low-pass filter, the end 1 that goes out of described low-pass filter is connected with the end 2 that enters of described amplifying unit, the end 1 that goes out of described amplifying unit is connected with the end 2 that enters of described sampling unit, the end 1 that goes out of described sampling unit is connected with the end 5 that enters of described signal processing and control module.
Alternatively, described rf transmitter unit sends radiofrequency signal according to the clock signal of described high-frequency signal source, the frequency of described radiofrequency signal at UHF wave band to S-band.
Alternatively, described coupling probe comprises radio-frequency antenna, and described radio-frequency antenna is for sending described radiofrequency signal and receiving harmonic wave or the composite wave signal that nonlinear node excites.
Alternatively, described low frequencies unit sends low frequency signal according to the clock signal of described low frequency signal source, and described low frequency signal is sent by the low-frequency coil in described coupling probe after power amplifier.
Alternatively, described signal is processed and control module is controlled respectively described high-frequency signal source and described low frequency signal source chronologically, makes system in time-sharing work state.
Alternatively, described signal is processed and control module comprises alarm decision module, receives the signal from described intermediate frequency detection unit and described sampling unit, determines whether send alerting signal by described alarm output module according to the various combination of signal intensity.
Principle of work of the present invention is:
After electromagnetic wave incides on any one nonlinear node, nonlinear node can excite radiation signal again, if incoming signal is single-frequency signals, the radiation signal again of nonlinear node is higher hamonic wave, as incoming signal be different frequency signal, the composite wave that the radiation signal again of nonlinear node is incoming signal.Based on this principle, when sending radiofrequency signal, rf transmitter unit of the present invention is irradiated to after target, and can be according to the nonlinear node characteristic of the reradiative signal determining target of target.
Metal detection technology is based on the law of electromagnetic induction, in the time that metallic conductor passes through an alternating magnetic field (primary field), because electromagnetic induction effect makes the generation secondary induction current (secondary field) identical with alternating magnetic field frequency in conductor.Utilize receiving coil receive the sum total field of secondary field or primary field and secondary field and draw corresponding field intensity numerical value, just can with by the analysis to secondary field or sum total field Changing Pattern, reach the object of detection metallic conductor.
Compared with prior art, the present invention has the following advantages:
1. adopt nonlinear node to survey the scheme combining with metal detection, can determine intuitively the characteristic of target, be conducive to the identification to target, solved the deficiency of single means Detection Techniques to target property discriminating power in the past.
2. the device such as high-frequency signal source, rf transmitter unit, the first filter bank, local oscillator unit, mixing unit, the second filter bank, intermediate frequency detection unit, panel control module, alarm output module, sampling unit, amplifying unit, low-pass filter, phase detector, low frequency signal source, low frequencies unit, prime amplifier all has ripe circuit, realizes more for convenience.
3. signal processing and control module adopt perfect computing machine and signal processing scheme, can different mode of operations be set by user, and possess learning functionality, can well adapt to various working environments.
4. the present invention adopts the method for time-sharing work, has well solved the problem of system coordination work.
In sum, composite detecting device of the present invention is by Nonlinear Parameter detection system and metal detecting system co-ordination, can be used for suspicious object to carry out contactless detection, can find metal target and nonlinear node target, and there is the ability of differentiating two kinds of targets.The present invention is applicable to the security protection inspection of the occasions such as airport, station, Conference Room, also can be used for the unit such as public security, national security to diplomacy, the check-up of Code in Hazardous Special Locations such as maintain secrecy.
Brief description of the drawings
The above and other features of the present invention, character and advantage are by by becoming more obvious below in conjunction with the description of drawings and Examples, wherein:
Fig. 1 is the metal of one embodiment of the invention and the theory diagram of Nonlinear Parameter composite detecting device.
Embodiment
Below in conjunction with specific embodiments and the drawings, the invention will be further described; set forth in the following description more details so that fully understand the present invention; but the present invention obviously can implement with the multiple alternate manner that is different from this description; those skilled in the art can do similar popularization, deduction according to practical situations without prejudice to intension of the present invention in the situation that, therefore should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 1 is the metal of one embodiment of the invention and the theory diagram of Nonlinear Parameter composite detecting device.As shown in Figure 1, this metal and Nonlinear Parameter composite detecting device can comprise: high-frequency signal source 1, rf transmitter unit 2, the first filter bank 3, local oscillator unit 4, mixing unit 5, the second filter bank 6, intermediate frequency detection unit 7, panel control module 8, alarm output module 9, signal are processed and control module 10, sampling unit 11, amplifying unit 12, low-pass filter 13, phase detector 14, low frequency signal source 15, low frequencies unit 16, prime amplifier 17 and coupling probe 18.
Wherein, the end 1 that goes out of high-frequency signal source 1 enters to hold 1 to be connected with rf transmitter unit 2, the end 2 that goes out of rf transmitter unit 2 is connected with the end 1 that enters of the first filter bank 3, the end 2 that goes out of the first filter bank 3 is connected with the end 1 that enters of coupling probe 18, the end 2 that goes out of high-frequency signal source 1 is connected with the end 1 that enters of local oscillator unit 4, the end 2 that goes out of local oscillator unit 4 is connected with the end 1 that enters of mixing unit 5, the end 2 that enters of mixing unit 5 is connected with the end 2 that goes out of the second filter bank 6, the end 1 that enters of the second filter bank 6 is connected with the end 2 that goes out of coupling probe 18, the end 3 that goes out of mixing unit 5 is connected with the end 1 that enters of intermediate frequency detection unit 7, the end 2 that goes out of intermediate frequency detection unit 7 is connected with the end 2 that enters of signal processing and control module 10, the end 3 that enters of high-frequency signal source 1 is connected with the end 1 that goes out of signal processing and control module 10, signal is processed and the end 3 that goes out of control module 10 is connected with the end 1 that enters of panel control module 8, signal is processed and the end 4 that goes out of control module 10 is connected with the end 1 that enters of alarm output module 9, the end 1 that enters of low frequency signal source 15 is connected with the end 6 that goes out of signal processing and control module 10, the end 2 that goes out of low frequency signal source 15 is connected with the end 1 that enters of low frequencies unit 16, the end 2 that goes out of low frequencies unit 16 is connected with the end 3 that enters of coupling probe 18, the end 4 that goes out of coupling probe 18 is connected with the end 2 that enters of prime amplifier 17, the end 1 that goes out of prime amplifier 17 is connected with the end 2 that enters of phase detector 14, the end 1 that goes out of phase detector 14 is connected with the end 2 that enters of low-pass filter 13, the end 1 that goes out of low-pass filter 13 is connected with the end 2 that enters of amplifying unit 12, the end 1 that goes out of amplifying unit 12 is connected with the end 2 that enters of sampling unit 11, the end 1 that goes out of sampling unit 11 is connected with the end 5 that enters of signal processing and control module 10.
Nonlinear node probe portion:
High-frequency signal source 1 is for generation of the clock signal of rf transmitter unit 2, local oscillator unit 4.
When the radiofrequency signal that radio-frequency antenna in coupling probe 18 sends is irradiated to nonlinear node, nonlinear node inspires harmonic wave or composite wave signal, and the radio-frequency antenna being combined in probe 18 is sent to mixing unit 5 through the second filter bank 6 after receiving.
Metal detection part:
Low frequency signal source 15 is for generation of the clock signal of low frequencies unit 16.
Low frequencies unit 16 sends low frequency signal according to the clock signal of low frequency signal source 15, after power amplifier, is sent by the low-frequency coil in coupling probe 18.
The low frequency signal that low-frequency coil in coupling probe 18 sends can produce alternating magnetic field, when through metal target, make to produce in metal target eddy current by the effect of electromagnetic induction, eddy current can produce secondary field, the low-frequency receiving coil being combined in probe 18 is delivered to prime amplifier 17 and is carried out pre-service, through phase detector 14 detections after receiving, pass through again low-pass filter 13, amplifying unit 12, sampling unit 11, signal is delivered to signal and process and control module 10.
Systems control division divides:
Signal is processed and control module 10 is controlled respectively high-frequency signal source 1 and low frequency signal source 15 chronologically, makes system in time-sharing work state, has solved the problem of nonlinear node probe portion with the mutual interference of metal detection part phase.In addition, signal is processed and control module 10 comprises alarm decision module (19), receive the signal from nonlinear node probe portion and metal detection part, determine whether send alerting signal by alarm output module 9 according to the various combination of signal intensity.
User can arrange various functions of the present invention by panel control module 8 as required, makes the present invention have all-environment adaptive faculty.
Because the present invention has adopted above technical scheme, the effect of its generation is obvious:
1. adopt nonlinear node to survey the scheme combining with metal detection, can determine intuitively the characteristic of target, be conducive to the identification to target, solved the deficiency of single means Detection Techniques to target property discriminating power in the past.
2. the device such as high-frequency signal source, rf transmitter unit, the first filter bank, local oscillator unit, mixing unit, the second filter bank, intermediate frequency detection unit, panel control module, alarm output module, sampling unit, amplifying unit, low-pass filter, phase detector, low frequency signal source, low frequencies unit, prime amplifier all has ripe circuit, realizes more for convenience.
3. signal processing and control module adopt perfect computing machine and signal processing scheme, can different mode of operations be set by user, and possess learning functionality, can well adapt to various working environments.
4. the present invention adopts the method for time-sharing work, has well solved the problem of system coordination work.
In sum, composite detecting device of the present invention is by Nonlinear Parameter detection system and metal detecting system co-ordination, can be used for suspicious object to carry out contactless detection, can find metal target and nonlinear node target, and there is the ability of differentiating two kinds of targets.The present invention is applicable to the security protection inspection of the occasions such as airport, station, Conference Room, also can be used for the unit such as public security, national security to diplomacy, the check-up of Code in Hazardous Special Locations such as maintain secrecy.
Although the present invention with preferred embodiment openly as above, it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible variation and amendment.Therefore, every content that does not depart from technical solution of the present invention, any amendment, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, within all falling into the protection domain that the claims in the present invention define.
Claims (6)
1. a metal and Nonlinear Parameter composite detecting device, comprise: high-frequency signal source (1), rf transmitter unit (2), the first filter bank (3), local oscillator unit (4), mixing unit (5), the second filter bank (6), intermediate frequency detection unit (7), panel control module (8), alarm output module (9), signal is processed and control module (10), sampling unit (11), amplifying unit (12), low-pass filter (13), phase detector (14), low frequency signal source (15), low frequencies unit (16), prime amplifier (17) and coupling probe (18),
Wherein, the end 1 that goes out of described high-frequency signal source (1) enters to hold 1 to be connected with described rf transmitter unit (2), the end 2 that goes out of described rf transmitter unit (2) is connected with the end 1 that enters of described the first filter bank (3), the end 2 that goes out of described the first filter bank (3) is connected with the end 1 that enters of described coupling probe (18), the end 2 that goes out of described high-frequency signal source (1) is connected with the end 1 that enters of described local oscillator unit (4), the end 2 that goes out of described local oscillator unit (4) is connected with the end 1 that enters of described mixing unit (5), the end 2 that enters of described mixing unit (5) is connected with the end 2 that goes out of described the second filter bank (6), the end 1 that enters of described the second filter bank (6) is connected with the end 2 that goes out of described coupling probe (18), the end 3 that goes out of described mixing unit (5) is connected with the end 1 that enters of described intermediate frequency detection unit (7), the end 2 that goes out of described intermediate frequency detection unit (7) is connected with the end 2 that enters of described signal processing and control module (10), the end 3 that enters of described high-frequency signal source (1) is connected with the end 1 that goes out of described signal processing and control module (10), described signal is processed and the end 3 that goes out of control module (10) is connected with the end 1 that enters of described panel control module (8), described signal is processed and the end 4 that goes out of control module (10) is connected with the end 1 that enters of described alarm output module (9), the end 1 that enters of described low frequency signal source (15) is connected with the end 6 that goes out of described signal processing and control module (10), the end 2 that goes out of described low frequency signal source (15) is connected with the end 1 that enters of described low frequencies unit (16), the end 2 that goes out of described low frequencies unit (16) is connected with the end 3 that enters of described coupling probe (18), the end 4 that goes out of described coupling probe (18) is connected with the end 2 that enters of described prime amplifier (17), the end 1 that goes out of described prime amplifier (17) is connected with the end 2 that enters of described phase detector (14), the end 1 that goes out of described phase detector (14) is connected with the end 2 that enters of described low-pass filter (13), the end 1 that goes out of described low-pass filter (13) is connected with the end 2 that enters of described amplifying unit (12), the end 1 that goes out of described amplifying unit (12) is connected with the end 2 that enters of described sampling unit (11), the end 1 that goes out of described sampling unit (11) is connected with the end 5 that enters of described signal processing and control module (10).
2. composite detecting device according to claim 1, it is characterized in that, described rf transmitter unit (2) sends radiofrequency signal according to the clock signal of described high-frequency signal source (1), the frequency of described radiofrequency signal at UHF wave band to S-band.
3. composite detecting device according to claim 2, is characterized in that, described coupling probe (18) comprises radio-frequency antenna, and described radio-frequency antenna is for sending described radiofrequency signal and receiving harmonic wave or the composite wave signal that nonlinear node excites.
4. composite detecting device according to claim 3, it is characterized in that, described low frequencies unit (16) sends low frequency signal according to the clock signal of described low frequency signal source (15), and described low frequency signal is sent by the low-frequency coil in described coupling probe (18) after power amplifier.
5. composite detecting device according to claim 4, it is characterized in that, described signal is processed and control module (10) is controlled respectively described high-frequency signal source (1) and described low frequency signal source (15) chronologically, makes system in time-sharing work state.
6. composite detecting device according to claim 5, it is characterized in that, described signal is processed and control module (10) comprises alarm decision module (19), receive the signal from described intermediate frequency detection unit (7) and described sampling unit (11), determine whether send alerting signal by described alarm output module (9) according to the various combination of signal intensity.
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Cited By (12)
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| CN105116455A (en) * | 2015-09-24 | 2015-12-02 | 长春市泽安科技有限公司 | Detector for composite metals and non-linear nodes |
| CN105371792A (en) * | 2014-08-25 | 2016-03-02 | 广西南宁西格汇居电子科技有限公司 | Turning axis digital phase distinguishing measurement method |
| CN105656566A (en) * | 2014-11-12 | 2016-06-08 | 公安部第研究所 | Nonlinear node detector |
| CN106054177A (en) * | 2016-05-24 | 2016-10-26 | 广东电网有限责任公司信息中心 | Electronic equipment detection device based on semiconductor component detection |
| CN106533486A (en) * | 2015-09-14 | 2017-03-22 | 公安部第研究所 | 2.4 GHz handheld nonlinear node detector |
| CN106772666A (en) * | 2016-11-17 | 2017-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of new violation electronic equipment detecting system and detection method |
| CN108051775A (en) * | 2017-10-20 | 2018-05-18 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | The detection system and method for passing type electronic device |
| CN108732633A (en) * | 2017-04-24 | 2018-11-02 | 广东建元和安科技发展有限公司 | Compound safety check instrument |
| CN109507642A (en) * | 2018-12-29 | 2019-03-22 | 广西科技大学 | A kind of Nonlinear Parameter harmonic detecting method based on noise FM technology |
| CN111819467A (en) * | 2018-01-25 | 2020-10-23 | 海浪科技有限公司 | Method and apparatus for estimating wave propagation and scattering parameters |
| CN112327373A (en) * | 2020-09-22 | 2021-02-05 | 四川中物裕邦科技有限公司 | A safety inspection door for detecting |
| US11885917B2 (en) | 2019-01-25 | 2024-01-30 | Surf Technology As | Methods and instrumentation for estimation of wave propagation and scattering parameters |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105371792A (en) * | 2014-08-25 | 2016-03-02 | 广西南宁西格汇居电子科技有限公司 | Turning axis digital phase distinguishing measurement method |
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| CN106533486A (en) * | 2015-09-14 | 2017-03-22 | 公安部第研究所 | 2.4 GHz handheld nonlinear node detector |
| CN105116455A (en) * | 2015-09-24 | 2015-12-02 | 长春市泽安科技有限公司 | Detector for composite metals and non-linear nodes |
| CN106054177A (en) * | 2016-05-24 | 2016-10-26 | 广东电网有限责任公司信息中心 | Electronic equipment detection device based on semiconductor component detection |
| CN106772666B (en) * | 2016-11-17 | 2019-04-09 | 中国电子科技集团公司第二十九研究所 | A kind of new violation electronic equipment detection system and detection method |
| CN106772666A (en) * | 2016-11-17 | 2017-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of new violation electronic equipment detecting system and detection method |
| CN108732633A (en) * | 2017-04-24 | 2018-11-02 | 广东建元和安科技发展有限公司 | Compound safety check instrument |
| CN108051775A (en) * | 2017-10-20 | 2018-05-18 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | The detection system and method for passing type electronic device |
| CN111819467A (en) * | 2018-01-25 | 2020-10-23 | 海浪科技有限公司 | Method and apparatus for estimating wave propagation and scattering parameters |
| CN111819467B (en) * | 2018-01-25 | 2024-05-07 | 海浪科技有限公司 | Method and apparatus for estimating wave propagation and scattering parameters |
| CN109507642A (en) * | 2018-12-29 | 2019-03-22 | 广西科技大学 | A kind of Nonlinear Parameter harmonic detecting method based on noise FM technology |
| US11885917B2 (en) | 2019-01-25 | 2024-01-30 | Surf Technology As | Methods and instrumentation for estimation of wave propagation and scattering parameters |
| CN112327373A (en) * | 2020-09-22 | 2021-02-05 | 四川中物裕邦科技有限公司 | A safety inspection door for detecting |
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