CN104680692A - Infrared sensing equipment - Google Patents
Infrared sensing equipment Download PDFInfo
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- CN104680692A CN104680692A CN201310621489.XA CN201310621489A CN104680692A CN 104680692 A CN104680692 A CN 104680692A CN 201310621489 A CN201310621489 A CN 201310621489A CN 104680692 A CN104680692 A CN 104680692A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
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Abstract
The invention relates to the technical field of security protection, and provides infrared sensing equipment, which comprises an HF-15 infrared transmitting module, a receiving module and an infrared sensing circuit, wherein the HF-15 infrared transmitting module comprises an HF-15 chip, a pin 5 and a pin 6 of the HF-15 chip are connected with a power source through a switch SK, a pin 3 and a pin 4 of the HF-15 chip are connected with a PH303 light emitting diode, a pin 1 and a pin 2 of the HF-15 chip are connected by a potentiometer RP1, the receiving module comprises an HJ-15 chip, a pin 1 and a pin 2 of the HJ-15 chip are connected with a PH302 infrared receiving tube, a pin 3 and a pin 6 of the HJ-15 chip are connected with a triode VT, the triode VT is used as a power source switch of the infrared sensing circuit, the infrared sensing circuit comprises a pyroelectric sensing probe, a pre-amplifying circuit, a comparing circuit and a delay alarming circuit which are sequentially connected, and the pre-amplifying circuit comprises an amplifier X1A and an amplifier X2B.
Description
Technical field
The present invention relates to technical field of security and protection, provide a kind of infrared induction equipment.
Background technology
In recent years, along with the deep development of reform and opening-up, the develop rapidly of electronic apparatus, the living standard of the people has had large increase.Various high-grade household appliances and valuables are had by many families.But some lawless persons are also more and more.This point is exactly that to see the antitheft consciousness of most people strong not enough. and cause steal phenomenon of common occurrence.Therefore, increasing residential households is extremely worried property safety problem.Antitheftly just become an important problem.Infrared anti-theft alarm is a kind of intelligent alarm system, can substantially increase the safe coefficient of residential households, effectively ensure that the personal safety as well as the property safety of resident.Because infrared ray loses light, there are very strong disguise and confidentiality, therefore be widely used in the safety protection devices such as antitheft, warning, by infrared emitting and accept system to respond to whether someone swarms into, if detect someone to swarm into, so the sound light alarming circuit of system can send alert song to people to remind.
Available circuit adopts active type infrared induction, during work, messenger only need to stand in before doorway circuit just can automatic sounding, the element composition infrared transmitting circuits such as multi-harmonic-oscillations NE555, oscillation frequency is at about 40kHZ, output current is 100-200mA, and infrarede emitting diode can be driven to send 40kHZ modulation infrared pulse wave signal.Although this structure theory structure is simple, due to the change of weather and temperature, the value of inductance and electric capacity can change, and mainly capacitance variations is large, will cause like this and receive imbalance, can not frequency, circuit when there being people to come, also not sounding.
Summary of the invention
The object of the present invention is to provide a kind of infrared induction equipment that a kind of reliability is strong.
The present invention is by the following technical solutions to achieve these goals:
Infrared induction equipment, is characterized in that: comprise HF-15 infrared transmission module, receiver module and infrared induction circuit,
HF-15 infrared transmission module comprises HF-15 chip, and 5 pins and 6 pins of HF-15 chip connect power supply by switch S K, and 3 pins and 4 pin direct type number are the light emitting diode of PH303, and 1 pin is connected by potentiometer RP1 with 2 pins;
Receiver module comprises HJ-15 chip, and 1 pin of HJ-15 chip and 2 pins connect the infrared receiving tube of PH302, and 3 pins and 6 pins of HJ-15 chip are connected to triode VT, and triode VT is as the power switch of infrared induction circuit;
Infrared induction circuit, comprise the pyroelectric sensing probe, pre-amplification circuit, comparator circuit and the delayed alarm circuit that are linked in sequence, described pre-amplification circuit comprises amplifier X1A and amplifier X2B,
The in-phase input end of amplifier X1A connects positive source by resistance R3, connects power cathode by resistance R5, and resistance R3 and resistance R5 forms 1/2Vcc and is biased, and the in-phase input end of amplifier X1A connects power cathode by weakening electric capacity C3,
The in-phase input end of amplifier X2B connects positive source by resistance R7, connects power cathode by resistance R8, and resistance R7 and resistance R8 forms 1/2Vcc and is biased, and the in-phase input end of amplifier X2B connects power cathode by weakening electric capacity C6,
Comparator circuit comprises operational amplifier X3C, operational amplifier X4D, operational amplifier A 1 output terminal connects diode VD1 anode, and operational amplifier A 2 output terminal connects diode VD2 anode, and the negative electrode of diode VD1 and diode VD2 is connected to resistance R14, resistance R14 connecting triode Q1
Delayed alarm circuit comprises NE555 timer, and the collector of triode Q1 connects NE555D timer, and 3 pins of NE555D timer connect the base stage of triode Q2, and the collector of triode Q2 connects loudspeaker, and the emitter of triode Q2 connects power cathode.
Because the present invention adopts above technical scheme, so possess following beneficial effect:
Structure of the present invention is simple, and reliability is strong, and major part is conventional integrated package, low price.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Infrared induction equipment, is characterized in that: comprise HF-15 infrared transmission module, receiver module and infrared induction circuit,
HF-15 infrared transmission module comprises HF-15 chip, and 5 pins and 6 pins of HF-15 chip connect power supply by switch S K, and 3 pins and 4 pin direct type number are the light emitting diode of PH303, and 1 pin is connected by potentiometer RP1 with 2 pins;
Receiver module comprises HJ-15 chip, and 1 pin of HJ-15 chip and 2 pins connect the infrared receiving tube of PH302, and 3 pins and 6 pins of HJ-15 chip are connected to triode VT, and triode VT is as the power switch of infrared induction circuit;
Infrared induction circuit, comprise the pyroelectric sensing probe, pre-amplification circuit, comparator circuit and the delayed alarm circuit that are linked in sequence, described pre-amplification circuit comprises amplifier X1A and amplifier X2B,
The in-phase input end of amplifier X1A connects positive source by resistance R3, connects power cathode by resistance R5, and resistance R3 and resistance R5 forms 1/2Vcc and is biased, and the in-phase input end of amplifier X1A connects power cathode by weakening electric capacity C3,
The in-phase input end of amplifier X2B connects positive source by resistance R7, connects power cathode by resistance R8, and resistance R7 and resistance R8 forms 1/2Vcc and is biased, and the in-phase input end of amplifier X2B connects power cathode by weakening electric capacity C6,
Comparator circuit comprises operational amplifier X3C, operational amplifier X4D, operational amplifier A 1 output terminal connects diode VD1 anode, and operational amplifier A 2 output terminal connects diode VD2 anode, and the negative electrode of diode VD1 and diode VD2 is connected to resistance R14, resistance R14 connecting triode Q1
Delayed alarm circuit comprises NE555 timer, and the collector of triode Q1 connects NE555D timer, and 3 pins of NE555D timer connect the base stage of triode Q2, and the collector of triode Q2 connects loudspeaker, and the emitter of triode Q2 connects power cathode.
The general four high guaily unit that amplifier X1A, amplifier X2B, operational amplifier X3C, operational amplifier X4D composition is cheap, uses wherein X1A, X2B two high and low logical amplifiers of amplifiers composition.First order amplifier gain is: AV1=R6/ R4=20, and second level amplifier gain is: AV2=R10/ R9=100, and full gain is AV=20 × 100=2 000=66 dB.The other operational amplifier X3C of voltage comparator part LM324, operational amplifier X4D two amplifier composition voltage compare detection windows, 3 pin of high and low logical amplifier and 5 pin are all set to 1/2Vcc, i.e. 3V by resistance R3, resistance R5 and resistance R7, resistance R8.When infrared sensor detects the activity of human body, its weak voltage signals produced is through amplifying, be sent to 10,13 pin time, can detect that peak value is about the sine wave of 5 V, so no matter positive half cycle or the negative half period of signal, one must be had in two comparers to export as low level, make 2 pin of NE555 jump into low level by high level, to control delay circuit work.And when infrared sensor does not detect that people is movable, from static circuit, this 3 V direct current signal is added to 10,13 pin simultaneously, know that again window voltage upper and lower limit is set to 3.4 V and 2.6 V by resistance R11, resistance R12, resistance R13, namely 9 pin are biased to 3.4V, and 12 pin are biased to 2.6V.Time static, voltage comparator output terminal 8,14 is low level, and switching tube ends, and 2 pin of NE555 are still high level, and delay circuit does not work.When infrared sensor detects the activity of people, when the positive half cycle of input signal, the level of 13 pin is higher than 2. 6 V comparative voltages added by 12 pin, and lower comparer is by 14 pin output low levels, and VD2 ends; Now because 10 pin level are higher than 9 pin, upper comparer exports high level, and VD1 conducting, its high level makes switching tube saturation conduction, 2 pin of NE555 is pulled into low level, causes delay circuit work.When signal negative half period, upper and lower comparer output level is just contrary, i.e. 8 pin output low levels, and 14 pin export high level, VD2 conducting.Visible, as long as sensor detects physical activity, be no matter positive half cycle or the negative half period of signal, one in two comparers, must be had to export as high level, control delay circuit work by switch triode.
Delay circuit U1 uses single time base circuit NE555, delay time t=1.1 R16 × C9 ≈ 60 s.Its effect has be for when oneself leaving detection zone provide one section non-alarm delay time at two: one; Two is after oneself enters detection zone, provide the time turned off needed for detecting device.During delay circuit work, the high level of output makes triode ON make loudspeaker sounding and lamp luminescence.
Claims (1)
1. an infrared induction equipment, is characterized in that: comprise HF-15 infrared transmission module, receiver module and infrared induction circuit,
HF-15 infrared transmission module comprises HF-15 chip, and 5 pins and 6 pins of HF-15 chip connect power supply by switch S K, and 3 pins and 4 pin direct type number are the light emitting diode of PH303, and 1 pin is connected by potentiometer RP1 with 2 pins;
Receiver module comprises HJ-15 chip, and 1 pin of HJ-15 chip and 2 pins connect the infrared receiving tube of PH302, and 3 pins and 6 pins of HJ-15 chip are connected to triode VT, and triode VT is as the power switch of infrared induction circuit;
Infrared induction circuit, comprise the pyroelectric sensing probe, pre-amplification circuit, comparator circuit and the delayed alarm circuit that are linked in sequence, described pre-amplification circuit comprises amplifier X1A and amplifier X2B,
The in-phase input end of amplifier X1A connects positive source by resistance R3, connects power cathode by resistance R5, and resistance R3 and resistance R5 forms 1/2Vcc and is biased, and the in-phase input end of amplifier X1A connects power cathode by weakening electric capacity C3,
The in-phase input end of amplifier X2B connects positive source by resistance R7, connects power cathode by resistance R8, and resistance R7 and resistance R8 forms 1/2Vcc and is biased, and the in-phase input end of amplifier X2B connects power cathode by weakening electric capacity C6,
Comparator circuit comprises operational amplifier X3C, operational amplifier X4D, operational amplifier A 1 output terminal connects diode VD1 anode, and operational amplifier A 2 output terminal connects diode VD2 anode, and the negative electrode of diode VD1 and diode VD2 is connected to resistance R14, resistance R14 connecting triode Q1
Delayed alarm circuit comprises NE555 timer, and the collector of triode Q1 connects NE555D timer, and 3 pins of NE555D timer connect the base stage of triode Q2, and the collector of triode Q2 connects loudspeaker, and the emitter of triode Q2 connects power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310621489.XA CN104680692A (en) | 2013-11-30 | 2013-11-30 | Infrared sensing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310621489.XA CN104680692A (en) | 2013-11-30 | 2013-11-30 | Infrared sensing equipment |
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| Publication Number | Publication Date |
|---|---|
| CN104680692A true CN104680692A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310621489.XA Pending CN104680692A (en) | 2013-11-30 | 2013-11-30 | Infrared sensing equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139566A (en) * | 2015-08-15 | 2015-12-09 | 华北电力大学（保定） | Security control circuit |
| CN106094896A (en) * | 2016-06-15 | 2016-11-09 | 常州工学院 | Air volume test system |
| CN106600937A (en) * | 2017-01-10 | 2017-04-26 | 中山市晶威电子科技有限公司 | Electric appliance achieving measuring signal wireless transmission between base and appliance body |
-
2013
- 2013-11-30 CN CN201310621489.XA patent/CN104680692A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139566A (en) * | 2015-08-15 | 2015-12-09 | 华北电力大学（保定） | Security control circuit |
| CN105139566B (en) * | 2015-08-15 | 2017-05-03 | 华北电力大学（保定） | Security control circuit |
| CN106094896A (en) * | 2016-06-15 | 2016-11-09 | 常州工学院 | Air volume test system |
| CN106600937A (en) * | 2017-01-10 | 2017-04-26 | 中山市晶威电子科技有限公司 | Electric appliance achieving measuring signal wireless transmission between base and appliance body |
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Application publication date: 20150603 |