CN2417508Y - Infrared reflection type alarming device - Google Patents
Infrared reflection type alarming device Download PDFInfo
- Publication number
- CN2417508Y CN2417508Y CN 00219941 CN00219941U CN2417508Y CN 2417508 Y CN2417508 Y CN 2417508Y CN 00219941 CN00219941 CN 00219941 CN 00219941 U CN00219941 U CN 00219941U CN 2417508 Y CN2417508 Y CN 2417508Y
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- CN
- China
- Prior art keywords
- circuit
- phototriode
- utility
- model
- infrared reflection
- 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.)
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Abstract
The utility model relates to an infrared reflection type alarming device. The utility model is characterized in that the infrared reflection type alarming device comprises a luminous diode VD, a phototriode VT and a shading block (2) which is arranged between the luminous diode VD and the phototriode VT and an alarm circuit, wherein, the alarm circuit comprises a signal receiving amplifying circuit, a signal identification circuit, a first oscillating circuit and a second oscillating circuit. Because the second oscillating circuit is connected with the luminous diode, the light rays emitted by the luminous diode are signals which can be identified by the phototriode. The utility model has the advantages of quick reaction speed and the arrangement of the signal identification circuits; therefore, the utility model is hardly influenced by external interference.
Description
The utility model relates to a kind of alarm.
In the prior art, be used for children and play by the alarm of the period of the day from 11 p.m. to 1 a.m and adopt temperature sensor mostly, its shortcoming is a delay effect, could move after must waiting sensor temperature to descend during warning; Be subjected to the influence of environment temperature when reporting to the police in addition and make lowest temperature set difficulty.
The purpose of this utility model is to provide a kind of infrared reflection alarm that is provided with light-emitting device and receiving trap, under normal circumstances the light of light-emitting device enters receiving trap by reverberation, but not receiving trap does not receive the light of light-emitting device and reports to the police under the normal condition.
The technical solution of the utility model is: a kind of infrared reflection alarm, it comprises light emitting diode VD, phototriode VT, be arranged at the light shielding block between described light emitting diode VD and the phototriode VT, warning circuit, described warning circuit comprises the received signal amplifying circuit, signal recognition circuit, first oscillatory circuit, second oscillatory circuit, the described light emitting diode VD of the output termination of described second oscillatory circuit, the output terminal of described phototriode VT is connected to the received signal amplifying circuit, the output termination signal recognition circuit of described received signal amplifying circuit, the input end of output termination first oscillatory circuit of described signal recognition circuit, the output terminal of described first oscillatory circuit is connected with hummer FM.
The utility model compared with prior art has following advantage:
Because second oscillatory circuit connects light emitting diode, the light that makes light emitting diode send is the signal that phototriode can be discerned, and reaction velocity is fast, has increased signal recognition circuit, therefore is subjected to external interference few.
The utility model will be further described below in conjunction with drawings and Examples:
Accompanying drawing 1 is circuit theory diagrams of the present utility model;
Accompanying drawing 2 is a structure cut-open view of the present utility model; Wherein:
[2], light shielding block; [4], shell;
Embodiment: referring to accompanying drawing 1, not gate D, not gate E and resistance R 15, resistance R 16, capacitor C 9 are the square wave of T as the oscillator output cycle, behind capacitor C 10, resistance R 17 differential, by the minimum same frequency square wave of not gate F shaping output low level dutycycle, this square wave drives infrared light-emitting diode VD emission infrared ray through current-limiting resistance R18.The infrared ray that is reflected is received by photosensitive triode VT, and resistance R 1 wherein, capacitor C 1 mainly are to eliminate the power supply interference that infrared is brought.The signal that receives after capacitor C 2 by the anti-phase amplification of operational amplifier IC1, amplify by operational amplifier IC2 homophase again, infrared signal after the amplification outputs to the differentiating circuit of being made up of capacitor C 4, resistance R 9, triggers not gate A, and formation maximum time width is the low level ripple of half T.This wavelength-division two-way, the one tunnel converts the high level ripple that time width is half T to through not gate B; Another road is the high level ripple of 3/2nds T through diode D1, capacitor C 5, resistance R 10, not gate C formation time width, again by resistance R 11, capacitor C 6 integrating circuit form the backward T time, width is the high level ripple of half T.Two road signals output to Sheffer stroke gate F, Sheffer stroke gate F output low level ripple, after diode D2, resistance 12, capacitor C 7 filtering, make the input of Sheffer stroke gate G one end keep low level, the oscillatory circuit failure of oscillation formed of Sheffer stroke gate G, Sheffer stroke gate H and resistance R 13, resistance R 14, capacitor C 8 then, an input end transporting to Sheffer stroke gate L is a low level, and hummer FM does not cry.If phototriode VT can not receive infrared signal, then the input end of Sheffer stroke gate F is cycle other low frequency environments clutter greater than T, Sheffer stroke gate F does not have the output of low level ripple, the input end of Sheffer stroke gate G is a high level, the oscillatory circuit starting of oscillation that Sheffer stroke gate G, Sheffer stroke gate H constitute, through Sheffer stroke gate L to hummer FM output alarm sound.
Claims (1)
1, a kind of infrared reflection alarm, it is characterized in that: it comprises light emitting diode VD, phototriode VT, be arranged at the light shielding block [2] between described light emitting diode VD and the phototriode VT, warning circuit, described warning circuit comprises the received signal amplifying circuit, signal recognition circuit, first oscillatory circuit, second oscillatory circuit, the described light emitting diode VD of the output termination of described second oscillatory circuit, the output terminal of described phototriode VT is connected to the received signal amplifying circuit, the output termination signal recognition circuit of described received signal amplifying circuit, the input end of output termination first oscillatory circuit of described signal recognition circuit, the output terminal of described first oscillatory circuit is connected with hummer FM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219941 CN2417508Y (en) | 2000-04-07 | 2000-04-07 | Infrared reflection type alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219941 CN2417508Y (en) | 2000-04-07 | 2000-04-07 | Infrared reflection type alarming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2417508Y true CN2417508Y (en) | 2001-01-31 |
Family
ID=33585068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00219941 Expired - Fee Related CN2417508Y (en) | 2000-04-07 | 2000-04-07 | Infrared reflection type alarming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2417508Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763561B (en) * | 2004-10-22 | 2010-05-05 | 施耐德电器工业公司 | Photoelectric detector |
| CN104952220A (en) * | 2015-07-02 | 2015-09-30 | 上海贝英电子科技有限公司 | System and method for detecting whether baby kicks off quilt |
-
2000
- 2000-04-07 CN CN 00219941 patent/CN2417508Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763561B (en) * | 2004-10-22 | 2010-05-05 | 施耐德电器工业公司 | Photoelectric detector |
| CN104952220A (en) * | 2015-07-02 | 2015-09-30 | 上海贝英电子科技有限公司 | System and method for detecting whether baby kicks off quilt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |