CN204439729U - A kind of examination hall communication apparatus detector circuit - Google Patents
A kind of examination hall communication apparatus detector circuit Download PDFInfo
- Publication number
- CN204439729U CN204439729U CN201520149863.5U CN201520149863U CN204439729U CN 204439729 U CN204439729 U CN 204439729U CN 201520149863 U CN201520149863 U CN 201520149863U CN 204439729 U CN204439729 U CN 204439729U
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- chip
- electric capacity
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- resistance
- communication apparatus
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Abstract
The utility model discloses a kind of examination hall communication apparatus detector circuit, comprise chip U1, chip U2, electric capacity C1, resistance R1, electric battery E and switch S.The signal that the utility model examination hall communication apparatus detector circuit can send by detecting communication apparatus determines that whether communication apparatus is in running order, circuit structure is simple, and volume is little, uses electronic component cheap, be applicable to very much promoting the use of, have great role for examination hall order keeping.
Description
Technical field
The utility model relates to a kind of detector, specifically a kind of examination hall communication apparatus detector circuit.
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
The purpose of this utility model is to provide a kind of easy to use, effective examination hall communication apparatus detector circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of examination hall communication apparatus detector circuit, comprises chip U1, chip U2, electric capacity C1, resistance R1, electric battery E and switch S, described electric capacity C1 one end connects antenna H, and the electric capacity C1 other end connects electric capacity C2 respectively, electric capacity C3 and chip U1 pin 2, chip U1 pin 3 connect the electric capacity C3 other end respectively, resistance R1, electric capacity C4 and resistance R2, the resistance R2 other end connects the electric capacity C2 other end respectively, the electric capacity C4 other end, resistance R3, electric capacity C6, light emitting diode D1 negative pole, chip U2 pin 1, electric capacity C8, electric capacity C9, hummer B and electric battery E negative pole, the described chip U1 pin 4 contact resistance R3 other end, chip U1 pin 6 is connecting triode Q1 base stage and the electric capacity C6 other end respectively, and chip U1 pin 1 connects chip U1 pin 8, the chip U1 pin 7 contact resistance R1 other end respectively by electric capacity C5, resistance R4, resistance R5, chip U2 pin 4, chip U2 pin 8, resistance R6 and switch S, described triode Q1 collector is the contact resistance R4 other end and electric capacity C7 respectively, triode Q1 emitter connecting luminous diode D1 positive pole, the described electric capacity C7 other end is the contact resistance R5 other end and chip U2 pin 2 respectively, chip U2 pin 5 connects electric capacity C8, chip U2 pin 3 connects the hummer B other end, and chip U2 pin 6 connects chip U2 pin 7 respectively, the electric capacity C9 other end and the resistance R6 other end, the described switch S other end connects electric battery E positive pole.
As further program of the utility model: described chip U1 model is CA3130.
As further program of the utility model: described chip U2 model is NE555.
As the utility model further scheme: described electric battery E voltage is 12V.
Compared with prior art, the beneficial effects of the utility model are: the signal that the utility model examination hall communication apparatus detector circuit can send by detecting communication apparatus determines that whether communication apparatus is in running order, circuit structure is simple, volume is little, use electronic component is cheap, be applicable to very much promoting the use of, have great role for examination hall order keeping.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of examination hall communication apparatus detector circuit.
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, a kind of examination hall communication apparatus detector circuit, comprises chip U1, chip U2, electric capacity C1, resistance R1, electric battery E and switch S, electric capacity C1 one end connects antenna H, and the electric capacity C1 other end connects electric capacity C2 respectively, electric capacity C3 and chip U1 pin 2, chip U1 pin 3 connect the electric capacity C3 other end respectively, resistance R1, electric capacity C4 and resistance R2, the resistance R2 other end connects the electric capacity C2 other end respectively, the electric capacity C4 other end, resistance R3, electric capacity C6, light emitting diode D1 negative pole, chip U2 pin 1, electric capacity C8, electric capacity C9, hummer B and electric battery E negative pole, the chip U1 pin 4 contact resistance R3 other end, chip U1 pin 6 is connecting triode Q1 base stage and the electric capacity C6 other end respectively, and chip U1 pin 1 connects chip U1 pin 8, the chip U1 pin 7 contact resistance R1 other end respectively by electric capacity C5, resistance R4, resistance R5, chip U2 pin 4, chip U2 pin 8, resistance R6 and switch S, triode Q1 collector is the contact resistance R4 other end and electric capacity C7 respectively, triode Q1 emitter connecting luminous diode D1 positive pole, the electric capacity C7 other end is the contact resistance R5 other end and chip U2 pin 2 respectively, chip U2 pin 5 connects electric capacity C8, chip U2 pin 3 connects the hummer B other end, and chip U2 pin 6 connects chip U2 pin 7 respectively, the electric capacity C9 other end and the resistance R6 other end, the switch S other end connects electric battery E positive pole.
Chip U1 model is CA3130.
Chip U2 model is NE555.
Electric battery E voltage is 12V
Principle of work of the present utility model is: the utility model circuit use electric capacity C3 catches the radiofrequency signal from communication apparatus, the wire length of electric capacity C3 is fixed as the spacing of 18 millimeters and 8 millimeters to obtain the frequency range expected, chip CA3130 amplifier integrated circuit be to be connected with electric capacity C3 as electric current for circuit between the electric pressure converter of anti-phase and non-inverting input, using the lead-in inductance of electric capacity C3 as transmission line, interception signal connects electric capacity C3 from communication apparatus, electric capacity C3 by store energy with the input of the form of Weak current to chip U1, this can destroy the balance input of chip U1 thus convert electric current to corresponding output voltage, electric capacity C4 keeps stable along with high value resistor R1, resistance R2 and electric capacity C4 provides discharge path.Electric capacity C5 is connected to chip U1 pin 8 and pin 1, the frequency response that the phase compensation of chip U1 and gain control system are optimized.
When electric capacity C3 detects mobile phone signal, the output of chip U1 is high and low alternately being showed by light emitting diode D1 according to the frequency representation of signal, flip chip U2 is by electric capacity C7, the base bias of the transistor Q1 that the action of electric capacity C6 maintained switch is fast, low value timing resistor R6 and electric capacity C9 produces very short time delay, to avoid audio frequency to create disturbances to, chip U2 is made to drive hummer B to send chimes of doom.
Claims (4)
1. an examination hall communication apparatus detector circuit, comprises chip U1, chip U2, electric capacity C1, resistance R1, electric battery E and switch S, is characterized in that, described electric capacity C1 one end connects antenna H, and the electric capacity C1 other end connects electric capacity C2 respectively, electric capacity C3 and chip U1 pin 2, chip U1 pin 3 connect the electric capacity C3 other end respectively, resistance R1, electric capacity C4 and resistance R2, the resistance R2 other end connects the electric capacity C2 other end respectively, the electric capacity C4 other end, resistance R3, electric capacity C6, light emitting diode D1 negative pole, chip U2 pin 1, electric capacity C8, electric capacity C9, hummer B and electric battery E negative pole, the described chip U1 pin 4 contact resistance R3 other end, chip U1 pin 6 is connecting triode Q1 base stage and the electric capacity C6 other end respectively, and chip U1 pin 1 connects chip U1 pin 8, the chip U1 pin 7 contact resistance R1 other end respectively by electric capacity C5, resistance R4, resistance R5, chip U2 pin 4, chip U2 pin 8, resistance R6 and switch S, described triode Q1 collector is the contact resistance R4 other end and electric capacity C7 respectively, triode Q1 emitter connecting luminous diode D1 positive pole, the described electric capacity C7 other end is the contact resistance R5 other end and chip U2 pin 2 respectively, chip U2 pin 5 connects electric capacity C8, chip U2 pin 3 connects the hummer B other end, and chip U2 pin 6 connects chip U2 pin 7 respectively, the electric capacity C9 other end and the resistance R6 other end, the described switch S other end connects electric battery E positive pole.
2. examination hall according to claim 1 communication apparatus detector circuit, is characterized in that, described chip U1 model is CA3130.
3. examination hall according to claim 1 communication apparatus detector circuit, is characterized in that, described chip U2 model is NE555.
4. examination hall according to claim 1 communication apparatus detector circuit, it is characterized in that, described electric battery E voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520149863.5U CN204439729U (en) | 2015-03-17 | 2015-03-17 | A kind of examination hall communication apparatus detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520149863.5U CN204439729U (en) | 2015-03-17 | 2015-03-17 | A kind of examination hall communication apparatus detector circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204439729U true CN204439729U (en) | 2015-07-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520149863.5U Expired - Fee Related CN204439729U (en) | 2015-03-17 | 2015-03-17 | A kind of examination hall communication apparatus detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204439729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305618A (en) * | 2020-09-30 | 2021-02-02 | 广东广晟通信技术有限公司 | Device for identifying whether communication equipment is carried or not |
-
2015
- 2015-03-17 CN CN201520149863.5U patent/CN204439729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305618A (en) * | 2020-09-30 | 2021-02-02 | 广东广晟通信技术有限公司 | Device for identifying whether communication equipment is carried or not |
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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: 20150701 Termination date: 20160317 |
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| CF01 | Termination of patent right due to non-payment of annual fee |