CN2154562Y - Synchronous detect type infrared photoelectric switch - Google Patents
Synchronous detect type infrared photoelectric switch Download PDFInfo
- Publication number
- CN2154562Y CN2154562Y CN 92241001 CN92241001U CN2154562Y CN 2154562 Y CN2154562 Y CN 2154562Y CN 92241001 CN92241001 CN 92241001 CN 92241001 U CN92241001 U CN 92241001U CN 2154562 Y CN2154562 Y CN 2154562Y
- Authority
- CN
- China
- Prior art keywords
- infrared
- frequency
- receiving
- circuit
- photoelectric switch
- 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
Links
Images
Abstract
The utility model relates to an infrared photoelectric switch, composed of an infrared transmitting tube (1), a transmitting circuit (2), a transmission control network (3), an infrared receiving tube (4), a receiving amplifier (5) and a demodulator (6), wherein, the essential technique is that the transmission control network is connected between the receiving circuit and the transmitting circuit. The frequency of the transmitting pulse permanently keeps consistent with the central frequency of a tone decoder of the receiving terminal owing to the function of the network, and the circuit has the advantages of unnecessary regulation of the frequency and stable and reliable work in various environments.
Description
The utility model relates to a kind of Photoelectric infrared switch.
The Photoelectric infrared switch of Cai Yonging to infrared receiving tube, amplifies the back by the ATD demodulation through media transmission, the output control level mostly by oscillation source, drive the infrared light of infrared transmitting tube transmitted pulse modulation through power amplification in recent years.Because of ATD has frequency selectivity preferably, so have noiseproof feature preferably.But the transmiting signal source of this kind circuit is different signal sources with the interior oscillation source of ATD, and the frequency that must adjust one of them oscillator just can make the signal that receives by demodulation so that the frequency of the two is consistent.Because the frequency stability of RC oscillator is not high, works long hours in addition, device parameter values can change, and can cause the whole system operation instability, influences the reliability of long-term work.
The purpose of this utility model is: provide a kind of frequency need not adjust, antijamming capability is strong, the stable and reliable operation Photoelectric infrared switch.
Realize that this purpose method is: be connected to the emission control network between receiving circuit and radiating circuit, the centre frequency of ATD of controlling exomonental frequency and receiving terminal is identical.Because adopt same oscillation source, transmitting-receiving frequency is identical forever, even frequency has greatly changed, also can not influence the work of demodulator.
Below in conjunction with description of drawings embodiment of the present utility model.
Synchronous demodulation formula Photoelectric infrared switch is made up of each several part shown in Figure 1, and wherein ［ 1 ］ is infrared transmitting tube, and ［ 2 ］ are radiating circuit, and ［ 3 ］ are the emission control network, and ［ 4 ］ are infrared receiving tube, and ［ 5 ］ are reception amplifier, and ［ 6 ］ are demodulator.
Fig. 2 is the electrical schematic diagram of this Photoelectric infrared switch.IC wherein
1Be 555, IC
2Be operational amplifier, IC
3Be ATD.IC
3Centre frequency, be selected in about 20KHz, this oscillator signal is by the Control Network control IC
1Driving infrared transmitting tube emission duty ratio is the pulse modulation infrared light of 1:10, and the infrared receiving tube that is received end through transmission medium receives, and through IC
2After the amplification, give IC
3Demodulation makes IC
3Output low level.When not having signal to be received, IC
3Be output as high level.IC
3Output level can be used to control follow-up exercises.According to the needs that use, this optoelectronic switch can transmission-type and the work of reflection-type dual mode, during for transmission-type, and IC
3Export high control level, during for reflection-type, IC
3The low control level of output.
Claims (1)
1, a kind of synchronous demodulation formula Photoelectric infrared switch, constitute by infrared transmitting tube [1], radiating circuit [2], emission control network [3], infrared receiving tube [4], reception amplifier [5], demodulator [6], it is characterized in that: between receiving circuit and radiating circuit, be connected to the emission control network, make the centre frequency of ATD of exomonental frequency and receiving terminal identical forever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92241001 CN2154562Y (en) | 1992-11-11 | 1992-11-11 | Synchronous detect type infrared photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92241001 CN2154562Y (en) | 1992-11-11 | 1992-11-11 | Synchronous detect type infrared photoelectric switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2154562Y true CN2154562Y (en) | 1994-01-26 |
Family
ID=33781190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92241001 Expired - Fee Related CN2154562Y (en) | 1992-11-11 | 1992-11-11 | Synchronous detect type infrared photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2154562Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700237A (en) * | 2013-12-12 | 2014-04-02 | 杨驾鹏 | Low-power-dissipation automatic monitoring system for insect pests |
-
1992
- 1992-11-11 CN CN 92241001 patent/CN2154562Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700237A (en) * | 2013-12-12 | 2014-04-02 | 杨驾鹏 | Low-power-dissipation automatic monitoring system for insect pests |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6081558A (en) | Apparatus and method for low power operation with high sensitivity in a communications receiver | |
| KR970002763B1 (en) | Remote control system | |
| US5602664A (en) | Infrared repeater | |
| CA2053778A1 (en) | Output level control circuit for use in rf power amplifier | |
| US5214526A (en) | Pulse modulated infrared data communications link | |
| WO2003028227A8 (en) | Power line communication circuit | |
| JP2000049712A (en) | Digital optical communication equipment and method therefor | |
| CN2154562Y (en) | Synchronous detect type infrared photoelectric switch | |
| CA2003207A1 (en) | Relay receiver | |
| US5760942A (en) | Noise tolerant receiver for wideband optical transmission system | |
| EP0292117A1 (en) | Automatic threshold adjustment circuit for digital data communication | |
| JPS623625B2 (en) | ||
| CN202352064U (en) | Infrared remote control receiving circuit | |
| CN211293641U (en) | Energy-saving electric wave clock | |
| CN204442381U (en) | A kind of super low-power consumption infrared communication system based on PFM mode | |
| CN200997156Y (en) | Wireless long-distance self-controlling belling device | |
| JPH10145296A (en) | Communication control circuit | |
| JPS63188092A (en) | Identification card | |
| JPS62151039A (en) | Optical output stabilizing system | |
| KR960004775Y1 (en) | Remote control circuit | |
| JPS59190740A (en) | Optical transmitter in space | |
| RU1793550C (en) | Single-sideband signal receiver | |
| JPS60169248A (en) | Optical fiber communication system | |
| JP2002101475A (en) | Optical wireless communication system | |
| KR19990015193A (en) | Infrared transceiver |
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 |