CN201838117U - Novel household alarming device - Google Patents
Novel household alarming device Download PDFInfo
- Publication number
- CN201838117U CN201838117U CN2010206059025U CN201020605902U CN201838117U CN 201838117 U CN201838117 U CN 201838117U CN 2010206059025 U CN2010206059025 U CN 2010206059025U CN 201020605902 U CN201020605902 U CN 201020605902U CN 201838117 U CN201838117 U CN 201838117U
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- CN
- China
- Prior art keywords
- relay
- triode
- amplifier circuit
- circuit
- novel household
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a novel household alarming device, which comprises a sensing copper wire, an operational amplifier circuit and an alarming circuit, wherein the sensing copper wire is connected with the operational amplifier circuit through a stray capacitance C1, an output end of the operational amplifier circuit is connected with a base electrode of a plug-and-print (PNP) triode V, a collector electrode of the triode V is connected with a relay, and the relay is also serially connected with a power supply loop of the alarming circuit. When a thief enters, the sensing copper wire is broken or vibrates, voltage of the stray capacitance C1 is changed, and U2 is changed to a low level, so the outputted U0 is changed to a low level; and the triode V is correspondently broken over, and the relay is actuated, so the alarming circuit plays the correspondent effect. The novel household alarming device is sensitive to sense, has a high antitheft coefficient and a low cost, and is easy to manufacture and popularize.
Description
Technical field
The utility model relates to antitheft field, especially a kind of novel household warning device.
Background technology
In home security, majority all is at place, outlet gateway warning device to be installed, and when stealer enters, triggers warning device at present, but existing this warning device complex structure, production cost is very high, should not promote.
The utility model content
The utility model technical assignment is at above-mentioned technical deficiency, and a kind of novel household warning device is provided.
The utility model technical solution technical scheme that problem adopts is: the novel household warning device, comprise induction copper cash, operation amplifier circuit and alarm circuit, and described induction copper cash is through stray capacitance C
1Link to each other with operation amplifier circuit, the operation amplifier circuit output terminal links to each other with the base stage of positive-negative-positive triode V, and the collector of triode V links to each other with relay, and this relay is serially connected in the alarm circuit simultaneously.
The beneficial effect that the utility model can bring is:
(1) induction is sensitive, antitheft coefficient height, and with low cost, make easily and promote.
Description of drawings
Fig. 1, circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done following detailed description:
As shown in Figure 1, the novel household warning device comprises induction copper cash 3, operation amplifier circuit and alarm circuit 2, and described induction copper cash 3 is through stray capacitance C
1Link to each other with operation amplifier circuit, the operation amplifier circuit output terminal links to each other with the base stage of positive-negative-positive triode V, and the collector of triode V links to each other with relay 1, and this relay 1 is serially connected in alarm circuit 2 current supply circuits simultaneously.Alarm circuit 2 is a prior art, just no longer too much explanation.
During concrete the use, the door of induction copper cash and metal, window etc. are linked to each other, when stealer enters, respond to copper cash 3 and rupture or vibrate stray capacitance C
1Change in voltage, U
2Just become low level, thereby make the U of output
0Become low level, the corresponding conducting of triode V, just action of relay 1 like this makes alarm circuit 2 play due effect.Stealer will timid to some extent withdrawing, and indoor people also can know the very first time has the people to slip in the family, avoids loss.
The utility model induction is sensitive, antitheft coefficient height, and with low cost, make easily and promote.
Claims (1)
1. novel household warning device, it is characterized in that: comprise induction copper cash, operation amplifier circuit and alarm circuit, described induction copper cash links to each other with operation amplifier circuit through stray capacitance C1, the operation amplifier circuit output terminal links to each other with the base stage of positive-negative-positive triode V, the collector of triode V links to each other with relay, and this relay is serially connected in the alarm circuit simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206059025U CN201838117U (en) | 2010-11-04 | 2010-11-04 | Novel household alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206059025U CN201838117U (en) | 2010-11-04 | 2010-11-04 | Novel household alarming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201838117U true CN201838117U (en) | 2011-05-18 |
Family
ID=44008218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206059025U Expired - Fee Related CN201838117U (en) | 2010-11-04 | 2010-11-04 | Novel household alarming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201838117U (en) |
-
2010
- 2010-11-04 CN CN2010206059025U patent/CN201838117U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20111104 |