CN205720711U - A kind of signal digital processing system for metal detector - Google Patents
A kind of signal digital processing system for metal detector Download PDFInfo
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- CN205720711U CN205720711U CN201620244355.XU CN201620244355U CN205720711U CN 205720711 U CN205720711 U CN 205720711U CN 201620244355 U CN201620244355 U CN 201620244355U CN 205720711 U CN205720711 U CN 205720711U
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Abstract
The utility model discloses a kind of signal digital processing system for metal detector, it is characterised in that: include the first single-chip microcomputer, transmitter module, receiver module and peripheral module；Wherein, transmitter module, receiver module, peripheral module are connected with the first single-chip microcomputer respectively；Transmitter module includes signal generator, power amplifier and the transmitting coil being sequentially connected with；The control end of signal generator and the first single-chip microcomputer connect, and signal generator is produced after launching signal and being amplified by power amplifier, is transferred to transmitting coil and launches；Receiver module includes receiving coil and the expansion board clamping being connected with the first single-chip microcomputer；Induced signal is transferred to expansion board clamping and processes by receiving coil.Use signal digital processing system of the present utility model, convert analog signals into Digital Signal Processing, improve signal handling capacity, it is simple to metal detector is installed and extends.
Description
Technical field
This utility model relates to metal detector technical field, a kind of signal digital processing system for metal detector.
Background technology
Metal detector is widely used in every field.AT STATION, airport, amusement place and other places, metal detector all can be installed.Whether metal detector detects on the person in a non-contact manner with metal.Metal detector includes hand-held detector and by formula detector.Equipped with transmitting coil and receiving coil inside metal detector.In time having metal near metal detector, the eddy current effect that metal produces can affect the magnetic field around metal detector, and at this moment receiving coil can produce faradic current, and voltage changes therewith.Situation is changed, it can be determined that whether with the presence of metallics by the voltage of detection receiving coil.
But, in the prior art, after receiving coil receives induced voltage, can be through amplifying circuit, filter circuit, enter back into analog signal processing module, disposal ability and degree of accuracy the highest, and be unfavorable for that metal detector carries out Function Extension.
Utility model content
Task of the present utility model is to improve disposal ability and the degree of accuracy of metal detector, metal detector can be carried out Function Extension.For achieving the above object, this patent adopts the following technical scheme that
A kind of signal digital processing system for metal detector, it is characterised in that: include the first single-chip microcomputer, transmitter module, receiver module and peripheral module；Wherein, transmitter module, receiver module, peripheral module is connected with the first single-chip microcomputer respectively；Transmitter module includes signal generator, power amplifier and the transmitting coil being sequentially connected with；The control end of signal generator and the first single-chip microcomputer connect, and signal generator is produced after launching signal and being amplified by power amplifier, is transferred to transmitting coil and launches；Receiver module includes receiving coil and the expansion board clamping being connected with the first single-chip microcomputer；Induced signal is transferred to expansion board clamping and processes by receiving coil.
Preferably, described expansion board clamping is at least provided with one.
Preferably, described expansion board clamping includes analogue signal branch road, analog-digital chip and digital signal processing module；Analogue signal branch road includes amplifying circuit and filter circuit, and is sequentially connected in series with analog-digital chip, digital signal processing module.
Preferably, described digital signal processing module includes field programmable gate array, second singlechip and random access memory；Interconnect between field programmable gate array, second singlechip and random access memory.
Preferably, described digital signal processing module is second singlechip.
Preferably, described receiving coil is at least provided with two, and is provided with the analogue signal branch road of equal number, and receiving coil is connected with analogue signal branch road.
Preferably, the model of described first single-chip microcomputer is stm32.
Preferably, the model of described second singlechip is TMS320F28335.
Preferably, the model of described field programmable gate array is EP4CE15E22.
Preferably, the model of described analog-digital chip is ADC12D040.
Preferably, the model of described signal generator is AD9833.
Preferably, the model of described power amplifier is OPA547.
Preferably, described peripheral module includes infrared emission induction apparatus, is used for determining whether that personnel pass through.
Preferably, described peripheral module includes computer, and computer receives warning message.
Preferably, described peripheral module loudspeaker and light bar, loudspeaker are for sending sound when reporting to the police, and vocal cords are for indicating the concrete locus of warning.
Use signal digital processing system of the present utility model, disposal ability and the degree of accuracy of metal detector can be improved, metal detector can be carried out Function Extension.
Accompanying drawing explanation
Fig. 1 is a this utility model embodiment block diagram for the signal digital processing system of metal detector；
Fig. 2 is this utility model expansion board clamping the second embodiment block diagram for the signal digital processing system of metal detector.
Fig. 3 is this utility model expansion board clamping the 3rd embodiment block diagram for the signal digital processing system of metal detector.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings, but protection domain of the present utility model is not limited to the scope of embodiment statement.
Signal digital processing system described in the utility model is used for metal detector.Described metal detector is the device of detection metal object.Device includes Handheld metal detector and by formula metal detector.
Refer to Fig. 1, Fig. 1 is a this utility model embodiment block diagram for the signal digital processing system of metal detector.Described signal digital processing system includes the first single-chip microcomputer 100, transmitter module, receiver module and peripheral module, and wherein, transmitter module, receiver module, peripheral module are connected with the first single-chip microcomputer 100 respectively.
Concrete, the model of the first single-chip microcomputer 100 can use stm32.
Signal generator 101 that transmitter module includes being sequentially connected with, power amplifier 102, transmitting coil 103.
Concrete, the model of signal generator 101 can be AD9833.The model of power amplifier 102 can use OPA547.Control end and first single-chip microcomputer 100 of signal generator 101 connect, and signal generator 101 is controlled by the first single-chip microcomputer 100, produce the signal of predeterminated frequency, and this signal is amplified through power amplifier 102, are then launched by transmitting coil 103.
According to Maxwell's Theory of Electromagnetic Field, launching signal from transmitting coil 103, through the propagation of air, receiving coil 104 has faradic current and induction electromotive force.Particularly, when there being other metal parts can produce eddy current effect near transmitting coil 103 or receiving coil 104, thus faradic current and the induction electromotive force that receiving coil 104 produces is affected.
Receiver module includes receiving coil 104 and expansion board clamping 105.In some embodiments, an expansion board clamping 105 connects plural receiving coil 104.Described signal digital processing system can be at least provided with an expansion board clamping 105, and expansion board clamping 105 connects the first single-chip microcomputer 100 in parallel.
It is this utility model expansion board clamping 105 second embodiment block diagram for the signal digital processing system of metal detector with further reference to Fig. 2, Fig. 2.Described expansion board clamping 105 includes analogue signal branch road, analog-digital chip 203, digital signal processing module, and three parts are sequentially connected with.Wherein, analogue signal branch road includes amplifying circuit 201, filter circuit 202, and in some embodiments, digital signal processing module includes field programmable gate array 204, random access memory the 205, first single-chip microcomputer 206.Field programmable gate array the 204, first single-chip microcomputer 206, random access memory 205 interconnect.
Concrete, the model of second singlechip 206 can use TMS320F28335.The model of field programmable gate array 204 is EP4CE15E22.The model of analog-digital chip 203 can use ADC12D040.
Receiving coil 104 is connected on the amplifying circuit 201 of expansion board clamping 105, and the induction electromotive force of receiving coil 104 carries out signal amplification through amplifying circuit 201, is then passed through filter circuit 202, is then sent through D/A converter module 203.It will be understood that the number that receiving coil 104 is arranged is consistent with the number that analogue signal branch road is arranged, in Fig. 2 or Fig. 3, denoting two analogue signal branch roads, analog-digital chip 203 is twin-channel.The analogue signal that analogue signal branch road exports is converted into digital signal by analog-digital chip 203.
After second singlechip 206 receives the triggering signal of the first single-chip microcomputer 100, send control signal to field programmable gate array 204.The digital signal that now analog-digital chip 203 is exported by field programmable gate array 204 carries out pretreatment, and then pre-processed results is deposited into random access memory 205.After data are stored in random access memory 205, field programmable gate array 204 sends write to second singlechip 206 and completes signal.
Second singlechip 206 receives after write completes signal, reads data, and calculates, calculate signal characteristic value from random access memory 205.When second singlechip 206 receives the inquiry command that the first single-chip microcomputer 100 sends, signal characteristic value is sent to the first single-chip microcomputer 100 by second singlechip 206.
It is this utility model expansion board clamping 105 the 3rd embodiment block diagram for the signal digital processing system of metal detector with further reference to Fig. 3, Fig. 3.
In some embodiments, described digital signal processing module is second singlechip 206.Above-mentioned field programmable gate array 204, random access memory 205 function is realized by second singlechip 206.
First embodiment, relative to the second embodiment, reads data and preprocessing tasks is placed in field programmable gate array, alleviate the work load of second singlechip 206, also allow for the upgrading of equipment.
With reference to Fig. 1, peripheral module also includes infrared emission induction apparatus 106.Infrared emission induction apparatus 106 is used for determining whether that personnel pass through metal detector.When there being personnel to pass through, infrared emission induction apparatus 106 can produce triggering signal, starts expansion board clamping 105, expansion board clamping 105 sampling signal calculated eigenvalue, and then the first single-chip microcomputer 100 obtains signal characteristic value by sending inquiry command.If according to the judgment rule in program, it is judged that signal characteristic value meets alarm signal trigger condition, warning message is sent to computer 107, light bar 108, loudspeaker 109 by serial ports.Wherein loudspeaker are for sending sound when reporting to the police, and vocal cords are for indicating the concrete locus of warning.In some embodiments, peripheral module also includes gate inhibition, circle machine equipment.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Skilled artisan would appreciate that, utility model scope involved in the application, it is not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should contain in the case of conceiving without departing from described utility model, other technical scheme being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously.Such as features described above and (but not limited to) disclosed herein have the technical characteristic of similar functions and replace mutually and the technical scheme that formed.
Claims (15)
1. the signal digital processing system for metal detector, it is characterised in that: include the first single-chip microcomputer, transmitter module, receiver module and peripheral module；Wherein, transmitter module, receiver module, peripheral module is connected with the first single-chip microcomputer respectively；Transmitter module includes signal generator, power amplifier and the transmitting coil being sequentially connected with；The control end of signal generator and the first single-chip microcomputer connect, and signal generator is produced after launching signal and being amplified by power amplifier, is transferred to transmitting coil and launches；Receiver module includes receiving coil and the expansion board clamping being connected with the first single-chip microcomputer；Induced signal is transferred to expansion board clamping and processes by receiving coil.
Signal digital processing system for metal detector the most according to claim 1, it is characterised in that: described expansion board clamping is at least provided with one.
Signal digital processing system for metal detector the most according to claim 2, it is characterised in that: described expansion board clamping includes analogue signal branch road, analog-digital chip and digital signal processing module；Analogue signal branch road includes amplifying circuit and filter circuit, and is sequentially connected in series with analog-digital chip, digital signal processing module.
Signal digital processing system for metal detector the most according to claim 3, it is characterised in that: described digital signal processing module includes field programmable gate array, second singlechip and random access memory；Interconnect between field programmable gate array, second singlechip and random access memory.
Signal digital processing system for metal detector the most according to claim 3, it is characterised in that: described digital signal processing module is second singlechip.
Signal digital processing system for metal detector the most according to claim 3, it is characterised in that: described receiving coil is at least provided with two, and is provided with the analogue signal branch road of equal number, and receiving coil is connected with analogue signal branch road.
Signal digital processing system for metal detector the most according to claim 6, it is characterised in that: the model of described first single-chip microcomputer is stm32.
Signal digital processing system for metal detector the most according to claim 4, it is characterised in that: the model of described second singlechip is TMS320F28335.
Signal digital processing system for metal detector the most according to claim 4, it is characterised in that: the model of described field programmable gate array is EP4CE15E22.
Signal digital processing system for metal detector the most according to claim 6, it is characterised in that: the model of described analog-digital chip is ADC12D040.
The 11. signal digital processing systems for metal detector according to claim 6, it is characterised in that: the model of described signal generator is AD9833.
The 12. signal digital processing systems for metal detector according to claim 6, it is characterised in that: the model of described power amplifier is OPA547.
13. according to the signal digital processing system for metal detector described in any claim in claim 1-12, it is characterised in that: described peripheral module includes infrared emission induction apparatus, is used for determining whether that personnel pass through.
14. according to the signal digital processing system for metal detector described in any claim in claim 1-12, it is characterised in that: described peripheral module includes computer, and computer receives warning message.
15. according to the signal digital processing system for metal detector described in any claim in claim 1-12, it is characterized in that: described peripheral module loudspeaker and light bar, loudspeaker are for sending sound when reporting to the police, and vocal cords are for indicating the concrete locus of warning.
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| CN201620244355.XU CN205720711U (en) | 2016-03-25 | 2016-03-25 | A kind of signal digital processing system for metal detector |
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| CN201620244355.XU CN205720711U (en) | 2016-03-25 | 2016-03-25 | A kind of signal digital processing system for metal detector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646628A (en) * | 2016-12-30 | 2017-05-10 | 合肥通用机械研究院 | Metal-detector-based metal detection device and metal detection method thereof |
| CN107272072A (en) * | 2017-07-03 | 2017-10-20 | 西京学院 | A kind of binary channels metal detector and its survey device method |
| WO2019127842A1 (en) * | 2017-12-29 | 2019-07-04 | 清华大学 | Metal detector for buried abandoned japanese chemical weapons |
| CN113900148A (en) * | 2021-09-15 | 2022-01-07 | 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） | Multi-frequency metal detector and metal target identification method |
| CN114002979A (en) * | 2021-10-28 | 2022-02-01 | 北京机械工业自动化研究所有限公司 | Control system of lightweight accelerator |
-
2016
- 2016-03-25 CN CN201620244355.XU patent/CN205720711U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646628A (en) * | 2016-12-30 | 2017-05-10 | 合肥通用机械研究院 | Metal-detector-based metal detection device and metal detection method thereof |
| CN107272072A (en) * | 2017-07-03 | 2017-10-20 | 西京学院 | A kind of binary channels metal detector and its survey device method |
| WO2019127842A1 (en) * | 2017-12-29 | 2019-07-04 | 清华大学 | Metal detector for buried abandoned japanese chemical weapons |
| CN113900148A (en) * | 2021-09-15 | 2022-01-07 | 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） | Multi-frequency metal detector and metal target identification method |
| CN113900148B (en) * | 2021-09-15 | 2023-09-12 | 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） | Multi-frequency metal detector and metal target identification method |
| CN114002979A (en) * | 2021-10-28 | 2022-02-01 | 北京机械工业自动化研究所有限公司 | Control system of lightweight accelerator |
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