CN205138644U - Infrared human induction detection circuit of electricity is released to heat - Google Patents
Infrared human induction detection circuit of electricity is released to heat Download PDFInfo
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- CN205138644U CN205138644U CN201520964688.5U CN201520964688U CN205138644U CN 205138644 U CN205138644 U CN 205138644U CN 201520964688 U CN201520964688 U CN 201520964688U CN 205138644 U CN205138644 U CN 205138644U
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Abstract
The utility model discloses an infrared human induction detection circuit of electricity is released to heat belongs to human induction detection circuit field. The utility model discloses an infrared human induction detection circuit of electricity is released to heat comprises thermal release infrared sensor BH, homophase low pass amplifier circuit, opposition low pass amplifier circuit, comparison circuit, monostable circuit and decoupling circuit. The utility model discloses the circuit is simple, the modularization of being convenient for, and sensitivity is high, the good reliability, and time delay function has, in case detected human the appearance, even the human body disappears immediately, the signal is guaranteed and is not lost that the range of application is wide to the automatic time delay of circuit output signal meeting.
Description
Technical field
The utility model relates to a kind of human body induction detection circuit, more particularly, relates to a kind of pyroelectric infrared human body induction testing circuit.
Background technology
The object radiation infrared heat electric flux that nature has, as the sun, lighting, lightning etc., its Infrared wavelength of launching is different, and general human body radiation wavelength is at about 9.4um.The sensitive element that pyroelectric sensor utilizes lead zirconates (PZT) material to make just carrys out the ultrared temperature variation of perception, thus exports faint electric signal.In addition, infrared fileter is additionally used at sensor surface, the effect of infrared fileter is the infrared signal choosing 7.5 ~ 14um wavelength, can effectively choose human body radiation infrared ray like this, get rid of the interference infrared ray of other objects, in fact the signal that pyroelectric sensor exports is directly proportional to the rate of change of infrared radiation temperature, and therefore pyroelectric sensor is only responsive to the human body of motion.Current pyroelectric sensor mostly is dual-element type, and this structure ensures that, when the temperature variation of element itself, the electric signal of generation is cancelled out each other.
Its detection range of pyroelectric infrared sensor only has about 1 meter, and after adding Fresnel optical system, detection range can reach 15m.The optical system supporting with sensor has three kinds: incident-type, transmission-type, refraction type, and current international market is main mainly with transmission-type.Optical system can focus on sensor the infrared ray that monitoring space radiation comes, and can not embody the change of these infrared energies observantly.Pyroelectric sensor induction be the changing value size of infrared radiation, instead of order of magnitude, Fresnel optical system can meet these conditions.Fresnel optical frames is by smooth optical mirror plane prismatic or column process, monitoring space is made to isolate as a series of narrow and small infrared " induction zone " and " dead zone " that replace, people moves wherein, the infrared ray in some " induction zone " will be made to cut in and out, what sensor was received is the changing value of energy, thus substantially increases receiving sensitivity.Therefore consider and pyroelectric infrared sensor is applied in the circuit of human body, so that the circuit of human body is more sensitive and accurate.
Summary of the invention
1. the utility model technical matters that will solve
The purpose of this utility model is the sensitivity of the electric circuit inspection overcoming existing human body and the low deficiency of accuracy, provides a kind of pyroelectric infrared human body induction testing circuit, adopts the technical solution of the utility model, circuit is simple, be convenient to modularization, highly sensitive, good reliability, and there is delay function, once detect that human body occurs, even if human body disappears immediately, circuit output signal meeting automatic time delay, ensure that signal is not lost, applied range.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
A kind of pyroelectric infrared human body induction testing circuit of the present utility model, comprise heat and release infrared sensor BH, homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, comparator circuit, monostable circuit and decoupling circuit, described heat is released infrared sensor BH and is provided with three pins, is respectively pin positive power source terminal, pin output terminal and pin earth terminal; Described heat releases the pin earth terminal ground connection of infrared sensor BH, the pin positive power source terminal that described heat releases infrared sensor BH is connected with the positive pole of power supply by decoupling circuit, power filtering capacitor successively, and the pin output terminal that described heat releases infrared sensor BH is connected with monostable circuit by homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, the 11 resistance R11, comparator circuit, diode V1 successively.
Further, described decoupling circuit comprises the 4th electrochemical capacitor C4, the 5th electric capacity C5 and the 5th resistance R5, described homophase low pass amplifying circuit comprises the first operational amplifier N1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the second electric capacity C2, the 3rd electrochemical capacitor C3, the 6th electric capacity C6 and the 7th electrochemical capacitor C7, described anti-phase low pass amplifying circuit comprises the second operational amplifier N2, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 8th electrochemical capacitor C8 and the 9th electric capacity C9, described comparator circuit comprises the 3rd operational amplifier N3, the 12 resistance R12, the 13 resistance R13 and the tenth electrochemical capacitor C10, described monostable circuit comprises four-operational amplifier N4, the 11 electrochemical capacitor C11 and adjustable resistance RP, the pin positive power source terminal that described heat releases infrared sensor BH is connected with one end of the 5th resistance R5 with a pole of the 4th electrochemical capacitor C4, a pole of the 5th electric capacity respectively, another pole of 4th electrochemical capacitor C4 and another extremely equal ground connection of the 5th electric capacity, be connected with the positive pole of power supply after the other end of the 5th resistance R5 is extremely connected with a pole of the 13 electric capacity C13, of the 12 electric capacity C12 respectively, ground connection after another of another pole of the 13 electric capacity C13 and the 12 electric capacity C12 is extremely connected, described heat release infrared sensor BH pin output terminal respectively with one end of the first resistance R1, one pole of the first electric capacity C1 is connected with one end of the second resistance R2, being connected to heat after another of the other end of the first resistance R1 and the first electric capacity C1 is extremely connected releases on the pin earth terminal of infrared sensor BH, the other end of the second resistance R2 is connected with the in-phase input end of the first operational amplifier N1 with a pole of the second electric capacity C2 respectively, the inverting input of the first operational amplifier N1 respectively with one end of the 3rd resistance R3, one end of 4th resistance R4 is extremely connected with one of the 6th electric capacity C6, extremely be connected and ground connection with another of the second electric capacity C2 after the other end of the 3rd resistance R3 is connected with the 3rd electrochemical capacitor C3, the output terminal of the first operational amplifier N1 is connected to after another of the other end of the 4th resistance R4 and the 6th electric capacity C6 is extremely connected, the output terminal of the first operational amplifier N1 is connected with one end of the 8th resistance R8 by the 7th electrochemical capacitor C7, the other end of the 8th resistance R8 respectively with the inverting input of the second operational amplifier N2, one end of tenth resistance R10, 9th electric capacity C9's is one extremely connected, the in-phase input end of the second operational amplifier N2 by the 9th resistance R9 respectively with one end of the 7th resistance R7, one end of 6th resistance R6 is extremely connected with one of the 8th electric capacity C8, the other end of the 6th resistance R6 is connected with positive source, the other end of the 7th resistance R7 and another rear ground connection that is extremely connected of the 8th electric capacity C8, the output terminal of the second operational amplifier N2 is connected to after another of the other end of the tenth resistance R10 and the 9th electric capacity C9 is extremely connected, the output terminal of the second operational amplifier N2 is connected with the in-phase input end of the 3rd operational amplifier N3 by the 11 resistance R11, the inverting input of the 3rd operational amplifier N3 respectively with one end of the 13 resistance R13, one end of 12 resistance R12 is extremely connected with one of the tenth electrochemical capacitor C10, the other end of the 12 resistance R12 is connected with the positive pole of power supply, the other end of the 13 resistance R13 and another pole of the tenth electrochemical capacitor C10 ground connection respectively, the output terminal of the 3rd operational amplifier N3 is connected with the negative pole of diode V1, the positive pole of diode V1 is connected with the in-phase input end of four-operational amplifier N4, the in-phase input end of four-operational amplifier N4 is connected with one end of adjustable resistance RP with a pole of the 11 electrochemical capacitor C11 respectively, another pole ground connection of 11 electrochemical capacitor C11, the other end of adjustable resistance RP connects the positive pole of power supply, between the inverting input that the inverting input of four-operational amplifier N4 is connected to the 3rd operational amplifier N3 and the 12 resistance R12, the output terminal of four-operational amplifier N4 exports electronegative potential or noble potential.
3. beneficial effect
The technical scheme adopting the utility model to provide, compared with existing known technology, has following beneficial effect:
(1) a kind of pyroelectric infrared human body induction testing circuit of the present utility model, it releases the pin earth terminal ground connection of infrared sensor, the pin positive power source terminal that heat releases infrared sensor BH is connected with the positive pole of power supply by decoupling circuit, power filtering capacitor successively, the pin output terminal that heat releases infrared sensor BH is connected with monostable circuit by homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, the 11 resistance R11, comparator circuit, diode V1 successively, circuit is simple, be convenient to modularization, highly sensitive, good reliability;
(2) a kind of pyroelectric infrared human body induction testing circuit of the present utility model, it adopts decoupling circuit to the positive pole finer filter of power supply, makes heat release infrared sensor BH and obtains galvanic current source, guarantee that heat releases infrared sensor BH working stability;
(3) a kind of pyroelectric infrared human body induction testing circuit of the present utility model, it is by regulating adjustable resistance RP, to regulate delay time, there is delay function, once detect that human body occurs, even if human body disappears immediately, circuit output signal meeting automatic time delay, ensures that signal is not lost;
(4) a kind of pyroelectric infrared human body induction testing circuit of the present utility model, it can be used on automatic energy saving lamp, burglar alarm, automatic door bell etc. needs to respond in the system of human body signal, be particularly suitable for being applied in the time delay automatic energy saving lamp that a kind of people is bright at lamp, people goes lamp to go out, applied range.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of pyroelectric infrared human body induction testing circuit of the present utility model.
Embodiment
For understanding content of the present utility model further, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.
Embodiment
Composition graphs 1, a kind of pyroelectric infrared human body induction testing circuit of the present embodiment, comprise heat and release infrared sensor BH, homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, comparator circuit, monostable circuit and decoupling circuit, heat is released infrared sensor BH and is provided with three pins, is respectively pin positive power source terminal, pin output terminal and pin earth terminal, heat releases the pin earth terminal ground connection of infrared sensor BH, the pin positive power source terminal that heat releases infrared sensor BH passes through decoupling circuit successively, power filtering capacitor is connected with the positive pole of power supply, adopt decoupling circuit to the positive pole finer filter of power supply, make heat release infrared sensor BH and obtain galvanic current source, guarantee that heat releases infrared sensor BH working stability, heat releases the pin output terminal of infrared sensor BH successively by homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, 11 resistance R11, comparator circuit, diode V1 is connected with monostable circuit, circuit is simple, be convenient to modularization, highly sensitive, good reliability, concrete connection is: decoupling circuit comprises the 4th electrochemical capacitor C4, the 5th electric capacity C5 and the 5th resistance R5, homophase low pass amplifying circuit comprises the first operational amplifier N1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the second electric capacity C2, the 3rd electrochemical capacitor C3, the 6th electric capacity C6 and the 7th electrochemical capacitor C7, anti-phase low pass amplifying circuit comprises the second operational amplifier N2, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 8th electrochemical capacitor C8 and the 9th electric capacity C9, comparator circuit comprises the 3rd operational amplifier N3, the 12 resistance R12, the 13 resistance R13 and the tenth electrochemical capacitor C10, monostable circuit comprises four-operational amplifier N4, the 11 electrochemical capacitor C11 and adjustable resistance RP, the pin positive power source terminal that heat releases infrared sensor BH is connected with one end of the 5th resistance R5 with a pole of the 4th electrochemical capacitor C4, a pole of the 5th electric capacity respectively, another pole of 4th electrochemical capacitor C4 and another extremely equal ground connection of the 5th electric capacity, be connected with the positive pole of power supply after the other end of the 5th resistance R5 is extremely connected with a pole of the 13 electric capacity C13, of the 12 electric capacity C12 respectively, ground connection after another of another pole of the 13 electric capacity C13 and the 12 electric capacity C12 is extremely connected, described heat release infrared sensor BH pin output terminal respectively with one end of the first resistance R1, one pole of the first electric capacity C1 is connected with one end of the second resistance R2, being connected to heat after another of the other end of the first resistance R1 and the first electric capacity C1 is extremely connected releases on the pin earth terminal of infrared sensor BH, the other end of the second resistance R2 is connected with the in-phase input end of the first operational amplifier N1 with a pole of the second electric capacity C2 respectively, the inverting input of the first operational amplifier N1 respectively with one end of the 3rd resistance R3, one end of 4th resistance R4 is extremely connected with one of the 6th electric capacity C6, extremely be connected and ground connection with another of the second electric capacity C2 after the other end of the 3rd resistance R3 is connected with the 3rd electrochemical capacitor C3, the output terminal of the first operational amplifier N1 is connected to after another of the other end of the 4th resistance R4 and the 6th electric capacity C6 is extremely connected, the output terminal of the first operational amplifier N1 is connected with one end of the 8th resistance R8 by the 7th electrochemical capacitor C7, the other end of the 8th resistance R8 respectively with the inverting input of the second operational amplifier N2, one end of tenth resistance R10, 9th electric capacity C9's is one extremely connected, the in-phase input end of the second operational amplifier N2 by the 9th resistance R9 respectively with one end of the 7th resistance R7, one end of 6th resistance R6 is extremely connected with one of the 8th electric capacity C8, the other end of the 6th resistance R6 is connected with positive source, the other end of the 7th resistance R7 and another rear ground connection that is extremely connected of the 8th electric capacity C8, the output terminal of the second operational amplifier N2 is connected to after another of the other end of the tenth resistance R10 and the 9th electric capacity C9 is extremely connected, the output terminal of the second operational amplifier N2 is connected with the in-phase input end of the 3rd operational amplifier N3 by the 11 resistance R11, the inverting input of the 3rd operational amplifier N3 respectively with one end of the 13 resistance R13, one end of 12 resistance R12 is extremely connected with one of the tenth electrochemical capacitor C10, the other end of the 12 resistance R12 is connected with the positive pole of power supply, the other end of the 13 resistance R13 and another pole of the tenth electrochemical capacitor C10 ground connection respectively, the output terminal of the 3rd operational amplifier N3 is connected with the negative pole of diode V1, the positive pole of diode V1 is connected with the in-phase input end of four-operational amplifier N4, the in-phase input end of four-operational amplifier N4 is connected with one end of adjustable resistance RP with a pole of the 11 electrochemical capacitor C11 respectively, another pole ground connection of 11 electrochemical capacitor C11, the other end of adjustable resistance RP connects the positive pole of power supply, between the inverting input that the inverting input of four-operational amplifier N4 is connected to the 3rd operational amplifier N3 and the 12 resistance R12, the output terminal of four-operational amplifier N4 exports electronegative potential or noble potential, by regulating adjustable resistance RP, to regulate delay time, there is delay function, once detect that human body occurs, even if human body disappears immediately, circuit output signal meeting automatic time delay, ensure that signal is not lost, can be used on automatic energy saving lamp, burglar alarm, automatic door bells etc. need to respond in the system of human body signal, be particularly suitable for being applied in a kind of people bright at lamp, the time delay automatic energy saving lamp that people goes lamp to go out, applied range.
When there being people to release infrared sensor BH close to heat, heat releases the pin output terminal output signal u of infrared sensor BH
i, after homophase low pass amplifying circuit and anti-phase low pass amplifying circuit, output signal u
o2, make to output signal u
o2be less than reference voltage U in comparator circuit
rEFtime, comparator circuit output signal u
o3for electronegative potential L, diode V1 forward conduction, makes the 11 electrochemical capacitor C11 discharge, u
oexport electronegative potential L; When people leaves after heat releases infrared sensor BH, heat releases the pin output terminal non-output signal of infrared sensor BH, after homophase low pass amplifying circuit and anti-phase low pass amplifying circuit, output signal u
o2be greater than reference voltage U in comparator circuit
rEF, comparator circuit output signal u
o3export noble potential H, diode V1 oppositely not conducting, the 11 electrochemical capacitor C11 charges, and the duration of charging depends on adjustable resistance RP, when the voltage on the 11 electrochemical capacitor C11 is charged to reference voltage U
rEFtime, u
ooutput potential is changed to noble potential H from electronegative potential L.
A kind of pyroelectric infrared human body induction testing circuit of the present utility model, circuit is simple, be convenient to modularization, highly sensitive, good reliability, and there is delay function, once detect that human body occurs, even if human body disappears immediately, circuit output signal meeting automatic time delay, ensure that signal is not lost, applied range.
Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (2)
1. a pyroelectric infrared human body induction testing circuit, it is characterized in that: comprise heat and release infrared sensor BH, homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, comparator circuit, monostable circuit and decoupling circuit, described heat is released infrared sensor BH and is provided with three pins, is respectively pin positive power source terminal, pin output terminal and pin earth terminal; Described heat releases the pin earth terminal ground connection of infrared sensor BH, the pin positive power source terminal that described heat releases infrared sensor BH is connected with the positive pole of power supply by decoupling circuit, power filtering capacitor successively, and the pin output terminal that described heat releases infrared sensor BH is connected with monostable circuit by homophase low pass amplifying circuit, anti-phase low pass amplifying circuit, the 11 resistance R11, comparator circuit, diode V1 successively.
2. a kind of pyroelectric infrared human body induction testing circuit according to claim 1, is characterized in that: described decoupling circuit comprises the 4th electrochemical capacitor C4, the 5th electric capacity C5 and the 5th resistance R5, described homophase low pass amplifying circuit comprises the first operational amplifier N1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the second electric capacity C2, the 3rd electrochemical capacitor C3, the 6th electric capacity C6 and the 7th electrochemical capacitor C7, described anti-phase low pass amplifying circuit comprises the second operational amplifier N2, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 8th electrochemical capacitor C8 and the 9th electric capacity C9, described comparator circuit comprises the 3rd operational amplifier N3, the 12 resistance R12, the 13 resistance R13 and the tenth electrochemical capacitor C10, described monostable circuit comprises four-operational amplifier N4, the 11 electrochemical capacitor C11 and adjustable resistance RP, the pin positive power source terminal that described heat releases infrared sensor BH is connected with one end of the 5th resistance R5 with a pole of the 4th electrochemical capacitor C4, a pole of the 5th electric capacity respectively, another pole of 4th electrochemical capacitor C4 and another extremely equal ground connection of the 5th electric capacity, be connected with the positive pole of power supply after the other end of the 5th resistance R5 is extremely connected with a pole of the 13 electric capacity C13, of the 12 electric capacity C12 respectively, ground connection after another of another pole of the 13 electric capacity C13 and the 12 electric capacity C12 is extremely connected, described heat release infrared sensor BH pin output terminal respectively with one end of the first resistance R1, one pole of the first electric capacity C1 is connected with one end of the second resistance R2, being connected to heat after another of the other end of the first resistance R1 and the first electric capacity C1 is extremely connected releases on the pin earth terminal of infrared sensor BH, the other end of the second resistance R2 is connected with the in-phase input end of the first operational amplifier N1 with a pole of the second electric capacity C2 respectively, the inverting input of the first operational amplifier N1 respectively with one end of the 3rd resistance R3, one end of 4th resistance R4 is extremely connected with one of the 6th electric capacity C6, extremely be connected and ground connection with another of the second electric capacity C2 after the other end of the 3rd resistance R3 is connected with the 3rd electrochemical capacitor C3, the output terminal of the first operational amplifier N1 is connected to after another of the other end of the 4th resistance R4 and the 6th electric capacity C6 is extremely connected, the output terminal of the first operational amplifier N1 is connected with one end of the 8th resistance R8 by the 7th electrochemical capacitor C7, the other end of the 8th resistance R8 respectively with the inverting input of the second operational amplifier N2, one end of tenth resistance R10, 9th electric capacity C9's is one extremely connected, the in-phase input end of the second operational amplifier N2 by the 9th resistance R9 respectively with one end of the 7th resistance R7, one end of 6th resistance R6 is extremely connected with one of the 8th electric capacity C8, the other end of the 6th resistance R6 is connected with positive source, the other end of the 7th resistance R7 and another rear ground connection that is extremely connected of the 8th electric capacity C8, the output terminal of the second operational amplifier N2 is connected to after another of the other end of the tenth resistance R10 and the 9th electric capacity C9 is extremely connected, the output terminal of the second operational amplifier N2 is connected with the in-phase input end of the 3rd operational amplifier N3 by the 11 resistance R11, the inverting input of the 3rd operational amplifier N3 respectively with one end of the 13 resistance R13, one end of 12 resistance R12 is extremely connected with one of the tenth electrochemical capacitor C10, the other end of the 12 resistance R12 is connected with the positive pole of power supply, the other end of the 13 resistance R13 and another pole of the tenth electrochemical capacitor C10 ground connection respectively, the output terminal of the 3rd operational amplifier N3 is connected with the negative pole of diode V1, the positive pole of diode V1 is connected with the in-phase input end of four-operational amplifier N4, the in-phase input end of four-operational amplifier N4 is connected with one end of adjustable resistance RP with a pole of the 11 electrochemical capacitor C11 respectively, another pole ground connection of 11 electrochemical capacitor C11, the other end of adjustable resistance RP connects the positive pole of power supply, between the inverting input that the inverting input of four-operational amplifier N4 is connected to the 3rd operational amplifier N3 and the 12 resistance R12, the output terminal of four-operational amplifier N4 exports electronegative potential or noble potential.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520964688.5U CN205138644U (en) | 2015-11-26 | 2015-11-26 | Infrared human induction detection circuit of electricity is released to heat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520964688.5U CN205138644U (en) | 2015-11-26 | 2015-11-26 | Infrared human induction detection circuit of electricity is released to heat |
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| CN205138644U true CN205138644U (en) | 2016-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427858A (en) * | 2016-10-26 | 2017-02-22 | 河南师范大学 | Automotive apnea-preventing safety system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106427858A (en) * | 2016-10-26 | 2017-02-22 | 河南师范大学 | Automotive apnea-preventing safety system |
| CN106427858B (en) * | 2016-10-26 | 2018-07-24 | 河南师范大学 | Automobile anti-suffocation security system |
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Granted publication date: 20160406 Termination date: 20171126 |