CN204405862U - The quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system - Google Patents
The quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system Download PDFInfo
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- CN204405862U CN204405862U CN201520134347.5U CN201520134347U CN204405862U CN 204405862 U CN204405862 U CN 204405862U CN 201520134347 U CN201520134347 U CN 201520134347U CN 204405862 U CN204405862 U CN 204405862U
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Abstract
What the utility model discloses the quick contraband goods detection instrument of a kind of hand-held adopts biography electronic system, comprises triode VT1, inductance L 2, inductance L 3, electric capacity C3, inductance L 1 and electric capacity C1.The utility model is by using the whole circuit of LC220A chip controls, and can detect whether there is communication signal around fast and accurately, circuit structure is simple, volume is little, use electronic component is cheap, is applicable to very much promoting the use of, and has great role for examination hall order keeping.
Description
Technical field
The utility model relates to a kind of detection instrument, specifically the quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system.
Background technology
Along with the development of science and technology, increasing communication facilities is used to the examination hall cheating of taking an examination, although examination hall is very strict for inspection, still has much such communication facilities to occur, and universal along with intelligent watch, safeguard that examination hall order has become a very difficult thing by naked eyes.
Utility model content
What the purpose of this utility model was to provide the quick contraband goods detection instrument of hand-held that a kind of circuit structure is simple, cost is low adopts biography electronic system, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
The quick contraband goods detection instrument of hand-held adopt a biography electronic system, comprise triode VT1, inductance L 2, inductance L 3, electric capacity C3, inductance L 1 and electric capacity C1, described triode VT1 base stage is contact resistance R1 respectively, resistance R2 and electric capacity C2, the electric capacity C2 other end connects inductance L 1 and tunable capacitor C1 respectively, and the tunable capacitor C1 other end connects inductance L 1 other end respectively, inductance L 2, resistance R4 and triode VT1 collector, triode VT1 emitter is contact resistance R3 and electric capacity C3, resistance R3 other end contact resistance R2 respectively respectively, electric capacity C4, triode VT2 emitter, electric capacity C6, diode VD2 positive pole, electric capacity C8, triode VT3 emitter, electric capacity C9, chip U1 pin 10, triode VT9 emitter, triode VT8 emitter and 6V power cathode, the electric capacity C9 other end connects chip U1 pin 2, and the described electric capacity C3 other end connects inductance L 2 other end respectively, the resistance R4 other end and inductance L 3, the described resistance R1 other end is contact resistance R5 respectively, resistance R7, resistance R8, chip U1 pin 14, resistance R9, triode VT5 emitter, triode VT6 emitter and switch S, described inductance L 3 other end is the contact resistance R5 other end respectively, the electric capacity C4 other end and electric capacity C5, the electric capacity C5 other end is contact resistance R6 and triode VT2 base stage respectively, and the resistance R6 other end is the contact resistance R7 other end respectively, triode VT2 collector, the electric capacity C6 other end and electric capacity C7, the electric capacity C7 other end connects diode VD2 negative pole and diode VD1 positive pole respectively, diode VD1 negative pole connects the electric capacity C8 other end and triode VT3 base stage respectively, triode VT3 collector is the contact resistance R8 other end and chip U1 pin 1 respectively, the chip U1 pin 13 contact resistance R9 other end, chip U1 pin 6 connects VT4 base stage and triode VT7 base stage respectively, triode VT4 emitter contact resistance R10, resistance R10 other end connecting triode VT5 base stage, triode VT4 collector connecting triode VT8 base stage, triode VT5 collector connects hummer B and triode VT9 collector respectively, triode VT9 base stage contact resistance R11, resistance R11 other end connecting triode VT7 emitter, the hummer B other end is connecting triode VT6 collector and triode VT8 collector respectively, described switch S connects 6V positive source.
As further program of the utility model: described chip U1 model is LC220A.
Compared with prior art, the beneficial effects of the utility model are: the utility model is by using the whole circuit of LC220A chip controls, can detect whether there is communication signal around fast and accurately, circuit structure is simple, volume is little, use electronic component is cheap, is applicable to very much promoting the use of, and has great role for examination hall order keeping.
Accompanying drawing explanation
Fig. 1 is the circuit diagram adopting biography electronic system of the quick contraband goods detection instrument of hand-held.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, the quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system, comprise triode VT1, inductance L 2, inductance L 3, electric capacity C3, inductance L 1 and electric capacity C1, triode VT1 base stage is contact resistance R1 respectively, resistance R2 and electric capacity C2, the electric capacity C2 other end connects inductance L 1 and tunable capacitor C1 respectively, and the tunable capacitor C1 other end connects inductance L 1 other end respectively, inductance L 2, resistance R4 and triode VT1 collector, triode VT1 emitter is contact resistance R3 and electric capacity C3, resistance R3 other end contact resistance R2 respectively respectively, electric capacity C4, triode VT2 emitter, electric capacity C6, diode VD2 positive pole, electric capacity C8, triode VT3 emitter, electric capacity C9, chip U1 pin 10, triode VT9 emitter, triode VT8 emitter and 6V power cathode, the electric capacity C9 other end connects chip U1 pin 2, the electric capacity C3 other end and connects inductance L 2 other end respectively, the resistance R4 other end and inductance L 3, the resistance R1 other end is contact resistance R5 respectively, resistance R7, resistance R8, chip U1 pin 14, resistance R9, triode VT5 emitter, triode VT6 emitter and switch S, inductance L 3 other end is the contact resistance R5 other end respectively, the electric capacity C4 other end and electric capacity C5, the electric capacity C5 other end is contact resistance R6 and triode VT2 base stage respectively, and the resistance R6 other end is the contact resistance R7 other end respectively, triode VT2 collector, the electric capacity C6 other end and electric capacity C7, the electric capacity C7 other end connects diode VD2 negative pole and diode VD1 positive pole respectively, diode VD1 negative pole connects the electric capacity C8 other end and triode VT3 base stage respectively, triode VT3 collector is the contact resistance R8 other end and chip U1 pin 1 respectively, the chip U1 pin 13 contact resistance R9 other end, chip U1 pin 6 connects VT4 base stage and triode VT7 base stage respectively, triode VT4 emitter contact resistance R10, resistance R10 other end connecting triode VT5 base stage, triode VT4 collector connecting triode VT8 base stage, triode VT5 collector connects hummer B and triode VT9 collector respectively, triode VT9 base stage contact resistance R11, resistance R11 other end connecting triode VT7 emitter, the hummer B other end is connecting triode VT6 collector and triode VT8 collector respectively, switch S connects 6V positive source.
Chip U1 model is LC220A.
Principle of work of the present utility model is: triode VT1 etc. form self-extinguishing superregenerative detection circuit, extinguish the height of frequency by inductance L 2, inductance L 3, the decisions such as electric capacity C3, inductance L 1, electric capacity C1 forms reception resonant tank, control capacittance C1 can change receive frequency, triode VT2 etc. form audio amplifier circuit, electric capacity C6 is high-frequency bypass capacitor, diode VD1, diode VD2, triode VT3 forms rectification triggering circuit, the biased of triode VT3 utilizes noise signal rectification triggering circuit, LC220A forms six road switch decoder driving circuits, MOD termination becomes self-locking manner,
Triode VT4 ~ VT9 forms signal amplification circuit, when surrounding has wireless signal, distinctive noise signal will be produced after superregenerative detection circuit receives signal, after triode VT2 audio frequency amplifies, again be rectified, its flip-flop is used for controlling trigger tube triode VT3. when noise signal is strong, triode VT3 conducting, collector becomes electronegative potential by noble potential, send into the 1st pin of LC220A, after inner decoding, export noble potential by the 6th pin, thus drive triode VT7 ~ VT9 conducting, hummer B reports to the police.
Claims (2)
1. the quick contraband goods detection instrument of hand-held adopt a biography electronic system, comprise triode VT1, inductance L 2, inductance L 3, electric capacity C3, inductance L 1 and electric capacity C1, is characterized in that, described triode VT1 base stage is contact resistance R1 respectively, resistance R2 and electric capacity C2, the electric capacity C2 other end connects inductance L 1 and tunable capacitor C1 respectively, and the tunable capacitor C1 other end connects inductance L 1 other end respectively, inductance L 2, resistance R4 and triode VT1 collector, triode VT1 emitter is contact resistance R3 and electric capacity C3, resistance R3 other end contact resistance R2 respectively respectively, electric capacity C4, triode VT2 emitter, electric capacity C6, diode VD2 positive pole, electric capacity C8, triode VT3 emitter, electric capacity C9, chip U1 pin 10, triode VT9 emitter, triode VT8 emitter and 6V power cathode, the electric capacity C9 other end connects chip U1 pin 2, and the described electric capacity C3 other end connects inductance L 2 other end respectively, the resistance R4 other end and inductance L 3, the described resistance R1 other end is contact resistance R5 respectively, resistance R7, resistance R8, chip U1 pin 14, resistance R9, triode VT5 emitter, triode VT6 emitter and switch S, described inductance L 3 other end is the contact resistance R5 other end respectively, the electric capacity C4 other end and electric capacity C5, the electric capacity C5 other end is contact resistance R6 and triode VT2 base stage respectively, and the resistance R6 other end is the contact resistance R7 other end respectively, triode VT2 collector, the electric capacity C6 other end and electric capacity C7, the electric capacity C7 other end connects diode VD2 negative pole and diode VD1 positive pole respectively, diode VD1 negative pole connects the electric capacity C8 other end and triode VT3 base stage respectively, triode VT3 collector is the contact resistance R8 other end and chip U1 pin 1 respectively, the chip U1 pin 13 contact resistance R9 other end, chip U1 pin 6 connects VT4 base stage and triode VT7 base stage respectively, triode VT4 emitter contact resistance R10, resistance R10 other end connecting triode VT5 base stage, triode VT4 collector connecting triode VT8 base stage, triode VT5 collector connects hummer B and triode VT9 collector respectively, triode VT9 base stage contact resistance R11, resistance R11 other end connecting triode VT7 emitter, the hummer B other end is connecting triode VT6 collector and triode VT8 collector respectively, described switch S connects 6V positive source.
2. the quick contraband goods detection instrument of hand-held according to claim 1 adopt biography electronic system, it is characterized in that, described chip U1 model is LC220A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520134347.5U CN204405862U (en) | 2015-03-10 | 2015-03-10 | The quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520134347.5U CN204405862U (en) | 2015-03-10 | 2015-03-10 | The quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204405862U true CN204405862U (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520134347.5U Expired - Fee Related CN204405862U (en) | 2015-03-10 | 2015-03-10 | The quick contraband goods detection instrument of a kind of hand-held adopt biography electronic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204405862U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590438A (en) * | 2016-12-09 | 2017-04-26 | 陈彦羽 | Distiller used for processing turpentine |
-
2015
- 2015-03-10 CN CN201520134347.5U patent/CN204405862U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590438A (en) * | 2016-12-09 | 2017-04-26 | 陈彦羽 | Distiller used for processing turpentine |
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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: 20150617 Termination date: 20160310 |
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| CF01 | Termination of patent right due to non-payment of annual fee |