CN203705660U - Double-coil metal detection circuit - Google Patents
Double-coil metal detection circuit Download PDFInfo
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- CN203705660U CN203705660U CN201320846429.3U CN201320846429U CN203705660U CN 203705660 U CN203705660 U CN 203705660U CN 201320846429 U CN201320846429 U CN 201320846429U CN 203705660 U CN203705660 U CN 203705660U
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Abstract
The utility model discloses a double-coil metal detection circuit, which belongs to the field of metal detection devices. the double-coil metal detection circuit particularly comprises a first detection coil, a second detection coil, a signal transmitting circuit, a timing circuit, a signal receiving circuit and a sound generator, wherein the signal transmitting circuit is respectively connected with the first detection coil and the second detection coil; the first detection coil, the second detection coil and the timing circuit are all connected with the signal receiving circuit; and the signal receiving circuit is connected with the sound generator. The double-coil metal detection circuit which is used for detecting metallic material in non metallic material solves the defects that the prior metal detection device is high in cost and is likely to damage mechanical equipment.
Description
Technical field
The utility model belongs to the sniffer field of metal, is specifically related to a kind of twin coil metal detection circuit.
Background technology
The regeneration of various resources becomes the important content of China's sustainable development, and for producing in industrialization, urbanization process and containing in the waste material of waste and old electromechanical equipment, electric wire, communication tool, automobile, household electrical appliances, electronic product, the iron and steel of reusable edible, non-ferrous metal, noble metal, the resource such as nonmetal, its utilization is equivalent to primary mineral resources; Therefore, the sorting technology of resource regeneration is more and more important, still adopts at present generally traditional sorting way as ground a large amount of magnetic separation, flotation, specific-gravity winnowings after particle screen selecting, or direct labor selects, sorting cost is high like this, expends greatly, destroys more serious to plant equipment.
Utility model content
The technical problems to be solved in the utility model is the defect of and fragile plant equipment high for current metal detection device cost, and a kind of twin coil metal detection circuit for detection of metal material in nonmetallic materials is provided for this reason.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of twin coil metal detection circuit, comprise the first detecting coil, the second detecting coil, signal transmission circuit, timing circuit, signal receiving circuit and sound generator, signal transmission circuit is connected with the first detecting coil and the second detecting coil respectively, the first detecting coil, the second detecting coil and timing circuit are all connected with signal receiving circuit, and signal receiving circuit is connected with sound generator.
Adopt a kind of twin coil metal detection of the utility model circuit to there is following technique effect:
Signal transmission circuit is an oscillator signal radiating circuit, produces the pulse signal of certain frequency; The first detecting coil is transmitting coil, the second detecting coil is receiving coil, utilize the Mutual Inductance Coupling principle of the first detecting coil and the second detecting coil, in the time that the first detecting coil approaches metallic object, due to the variation of coupling parameter, oscillation frequency is changed, make the voltage of the first detecting coil higher than the voltage of the second detecting coil, sound thereby trigger sound generator, the distance of the first detecting coil and metal is nearer, and the sound that sound generator sends is higher.The first detecting coil is during from different Metal Contact, and the sound sending is also different, thereby can be used for detecting different metal.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the embodiment of a kind of twin coil metal detection of the utility model circuit.
Fig. 2 is the structural drawing of the timing circuit of a kind of twin coil metal detection of the utility model circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, a kind of twin coil metal detection of the utility model circuit, specifically comprise: the first detecting coil, the second detecting coil, signal transmission circuit, timing circuit, signal receiving circuit and sound generator, signal transmission circuit is connected with the first detecting coil and the second detecting coil respectively, the first detecting coil, the second detecting coil and timing circuit are all connected with signal receiving circuit, and signal receiving circuit is connected with sound generator.
In specific implementation process, vibration chip IC 1 and resistance R 1, resistance R 2 and capacitor C 2 form multivibrator, and frequency is in 100Hz left and right.Time base chip IC 2 and resistance R 4, capacitor C 4 compositions trigger timing circuits, by the trigger action of vibration chip IC 1, timing is about 165us at every turn.In timing, make the first triode VT1 and the second triode VT2 saturation conduction.The induced signal of the first detecting coil and the second detecting coil is carried out differential amplification by the first comparer IC5, during the unlatching ripple door that the signal after amplification comes at timing circuit, delivers to detecting amplifier IC6 by field effect transistor VT3.In the time there is no metal induced signal, field effect transistor VT3 cut-off.When search coil gradually to metallic object near time, it is large that induced signal becomes, field effect transistor VT3 conduction status improves, thereby the oscillation frequency of the output signal of detecting amplifier IC6 increases gradually, in the time approaching metallic object, can send high frequency sound equipment, represent to have metal objects herein.
In addition, as shown in Figure 2, described timing circuit comprises timing chip IC3 and flip chip IC4, the output terminal of timing chip IC3 is connected with the trigger end of flip chip IC4, the output terminal of flip chip IC4 is connected with signal receiver, the output terminal of signal transmission circuit is connected with the trigger end of timing chip IC3, and timing chip IC3 and resistance R 10, capacitor C 7 form single stabilization delay circuit, and delay time is about 36us; The output of timing chip IC3 is inputted flip chip IC4 after capacitor C 8 and resistance R 11 differential, the about 50us of time delay, and the field effect transistor VT3 of receiver is delivered in its output, as opening ripple door.
Device is selected: vibration chip IC 1, time base chip IC 2, timing chip IC3 and flip chip IC4 be 555 types of TI company, the first comparer IC5 and detecting amplifier IC6 are LF351 type.
For a person skilled in the art; do not departing under the prerequisite of the utility model structure; can also make some distortion and improvement, these also should be considered as protection domain of the present utility model, and these can not affect effect and practical applicability that the utility model is implemented.
Claims (1)
1. a twin coil metal detection circuit, it is characterized in that: comprise the first detecting coil, the second detecting coil, signal transmission circuit, timing circuit, signal receiving circuit and sound generator, signal transmission circuit is connected with the first detecting coil and the second detecting coil respectively, the first detecting coil, the second detecting coil and timing circuit are all connected with signal receiving circuit, and signal receiving circuit is connected with sound generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320846429.3U CN203705660U (en) | 2013-12-20 | 2013-12-20 | Double-coil metal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320846429.3U CN203705660U (en) | 2013-12-20 | 2013-12-20 | Double-coil metal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705660U true CN203705660U (en) | 2014-07-09 |
Family
ID=51056080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320846429.3U Expired - Fee Related CN203705660U (en) | 2013-12-20 | 2013-12-20 | Double-coil metal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705660U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019388A (en) * | 2016-07-14 | 2016-10-12 | 成都市思卡利科技有限公司 | Metal detection system designed based on applications of voltage stabilizing circuit |
| CN106019387A (en) * | 2016-07-14 | 2016-10-12 | 成都市思卡利科技有限公司 | System for metal detection |
| CN106226827A (en) * | 2016-07-14 | 2016-12-14 | 成都市思卡利科技有限公司 | A kind of metal probing method based on mu balanced circuit Application Design |
-
2013
- 2013-12-20 CN CN201320846429.3U patent/CN203705660U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019388A (en) * | 2016-07-14 | 2016-10-12 | 成都市思卡利科技有限公司 | Metal detection system designed based on applications of voltage stabilizing circuit |
| CN106019387A (en) * | 2016-07-14 | 2016-10-12 | 成都市思卡利科技有限公司 | System for metal detection |
| CN106226827A (en) * | 2016-07-14 | 2016-12-14 | 成都市思卡利科技有限公司 | A kind of metal probing method based on mu balanced circuit Application Design |
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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: 20140709 Termination date: 20141220 |
|
| EXPY | Termination of patent right or utility model |