CN203732164U - Human body infrared energy detection circuit - Google Patents
Human body infrared energy detection circuit Download PDFInfo
- Publication number
- CN203732164U CN203732164U CN201420009847.1U CN201420009847U CN203732164U CN 203732164 U CN203732164 U CN 203732164U CN 201420009847 U CN201420009847 U CN 201420009847U CN 203732164 U CN203732164 U CN 203732164U
- Authority
- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- capacitor
- human body
- circuit
- 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
Abstract
The utility model discloses a human body infrared energy detection circuit, and belongs to the technical field of human body detectors. The human body infrared energy detection circuit comprises a pyroelectric human body infrared sensor circuit, a voltage amplifier circuit and a comparator circuit, the pyroelectric human body infrared sensor circuit is electrically connected with the voltage amplifier circuit, and the voltage amplifier circuit is electrically connected with the comparator circuit. The human body infrared energy detection circuit has the beneficial effects that the circuit structure is simplified through improving a traditional human body detector circuit structure, cost is reduced, stability of technical performance is improved, and infrared radiation detection of a human body is accurate and cannot be interfered by other external factors.
Description
Technical field
The utility model relates to a kind of infrared energy testing circuit, and specifically a kind of human body infrared energy testing circuit, belongs to peoplesniffer technical field.
Background technology
Continuous progress along with the epoch, people have higher requirement to the security of own environment of living in, existing peoplesniffer is generally passive pyroelectric infrared eye, this passive pyroelectric infrared detector structure is complicated, technical feature is stable not, and be easily subject to the interference of various light sources, power supply, when environment temperature and human body temperature approach, passive pyroelectric infrared eye detection sensitivity obviously declines, and sometimes also can cause the short time malfunctioning.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of human body infrared energy testing circuit, existing circuit structure improved, when simplifying circuit structure, the stability of the performance that develops skill and detection sensitivity.
To achieve these goals, the technical solution adopted in the utility model is: a kind of human body infrared energy testing circuit, comprise pyroelectric human body infrared sensor circuit, voltage amplifier circuit and comparator circuit, described pyroelectric human body infrared sensor circuit and voltage amplifier circuit are electrically connected to, and voltage amplifier circuit and comparator circuit are electrically connected to.
Further, pyroelectric human body infrared sensor circuit comprises chip PY, resistance R 1, resistance R 3, capacitor C 2, capacitor C 4 and capacitor C 5, the positive pole of capacitor C 4 and capacitor C 5 is parallel to respectively between the pin one of chip PY and one end of resistance R 3, the minus earth of the other end of capacitor C 4 and capacitor C 5; Resistance R 1 is connected with the pin two of chip PY with the one end after capacitor C 2 parallel connections, other end ground connection; Pin 3 ground connection of chip PY.
Further, voltage amplifier circuit comprises operational amplifier IC1, operational amplifier IC2, resistance R 2, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 3, capacitor C 1, capacitor C 6, electrochemical capacitor C7 and capacitor C 8, the in-phase input end of operational amplifier IC1 is connected with the pin two of chip PY, resistance R 4 is connected with the inverting input of operational amplifier IC1 with the one end after capacitor C 1 parallel connection, the other end is connected with the output terminal of operational amplifier IC1, the output terminal of operational amplifier IC1 is by resistance R 5, capacitor C 6 is connected with the inverting input of operational amplifier IC2, resistance R 2 is connected with the inverting input of operational amplifier IC1 with the one end after capacitor C 3 series connection, other end ground connection, resistance R 8 is connected with the inverting input of operational amplifier IC2 with the one end after capacitor C 8 parallel connections, and the other end is connected with the output terminal of operational amplifier IC2, one end ground connection after resistance R 7 and electrochemical capacitor C7 parallel connection, the other end is connected with the other end of resistance R 3 by resistance R 6.
Further, comparator circuit comprises operational amplifier IC3, operational amplifier IC4, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, electrochemical capacitor C9, diode VD1, diode VD2, LED 1 and LED 2, after being connected, the inverting input of the in-phase input end of operational amplifier IC3 and operational amplifier IC4 is connected with the output terminal of operational amplifier IC2 by resistance R 9, the inverting input of operational amplifier IC3 is connected with one end of resistance R 11 with one end of resistance R 10, the other end external power supply of resistance R 10, the output terminal of operational amplifier IC3 connects by the positive pole of diode VD1, ground connection after the negative pole of diode VD1 is connected with LED 1 with resistance R 13 successively, one end ground connection after resistance R 12 is in parallel with electrochemical capacitor C9, the other end is connected with the other end of resistance R 11, the output terminal of operational amplifier IC4 is connected with the positive pole of diode VD2, ground connection after the negative pole of diode VD2 is connected with resistance R 14, LED 2 successively.
The beneficial effects of the utility model are: by existing peoplesniffer circuit structure is improved, circuit structure is simplified, when reducing costs, improved the stability of technical feature, infrared detective to human body is accurate, can not be subject to the interference of other extraneous factors.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of human body infrared energy testing circuit, comprise pyroelectric human body infrared sensor circuit, voltage amplifier circuit and comparator circuit, described pyroelectric human body infrared sensor circuit and voltage amplifier circuit are electrically connected to, and voltage amplifier circuit and comparator circuit are electrically connected to.
Pyroelectric human body infrared sensor circuit comprises chip PY, resistance R 1, resistance R 3, capacitor C 2, capacitor C 4 and capacitor C 5, the positive pole of capacitor C 4 and capacitor C 5 is parallel to respectively between the pin one of chip PY and one end of resistance R 3, the minus earth of the other end of capacitor C 4 and capacitor C 5; Resistance R 1 is connected with the pin two of chip PY with the one end after capacitor C 2 parallel connections, other end ground connection; Pin 3 ground connection of chip PY.
Voltage amplifier circuit comprises operational amplifier IC1, operational amplifier IC2, resistance R 2, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 3, capacitor C 1, capacitor C 6, electrochemical capacitor C7 and capacitor C 8, the in-phase input end of operational amplifier IC1 is connected with the pin two of chip PY, resistance R 4 is connected with the inverting input of operational amplifier IC1 with the one end after capacitor C 1 parallel connection, the other end is connected with the output terminal of operational amplifier IC1, the output terminal of operational amplifier IC1 is by resistance R 5, capacitor C 6 is connected with the inverting input of operational amplifier IC2, resistance R 2 is connected with the inverting input of operational amplifier IC1 with the one end after capacitor C 3 series connection, other end ground connection, resistance R 8 is connected with the inverting input of operational amplifier IC2 with the one end after capacitor C 8 parallel connections, and the other end is connected with the output terminal of operational amplifier IC2, one end ground connection after resistance R 7 and electrochemical capacitor C7 parallel connection, the other end is connected with the other end of resistance R 3 by resistance R 6.
Comparator circuit comprises operational amplifier IC3, operational amplifier IC4, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, electrochemical capacitor C9, diode VD1, diode VD2, LED 1 and LED 2, after being connected, the inverting input of the in-phase input end of operational amplifier IC3 and operational amplifier IC4 is connected with the output terminal of operational amplifier IC2 by resistance R 9, the inverting input of operational amplifier IC3 is connected with one end of resistance R 11 with one end of resistance R 10, the other end external power supply of resistance R 10, the output terminal of operational amplifier IC3 connects by the positive pole of diode VD1, ground connection after the negative pole of diode VD1 is connected with LED 1 with resistance R 13 successively, one end ground connection after resistance R 12 is in parallel with electrochemical capacitor C9, the other end is connected with the other end of resistance R 11, the output terminal of operational amplifier IC4 is connected with the positive pole of diode VD2, ground connection after the negative pole of diode VD2 is connected with resistance R 14, LED 2 successively.
The course of work: in circuit, operational amplifier IC1 and operational amplifier IC2 form two-stage magnification at high multiple device, the feeble signal that pyroelectric human body infrared sensor circuit is detected is amplified, operational amplifier IC3 and operational amplifier IC4 form window comparator, when the voltage amplitude of operational amplifier IC2 at UA between UB time, operational amplifier IC3, operational amplifier IC4 output low level;
When the output voltage of operational amplifier IC2 is greater than UA, operational amplifier IC3 exports high level; When the output voltage of operational amplifier IC2 is less than UB, operational amplifier IC4 exports high level, and output respectively after diode VD1, diode VD2 isolation, to control follow-up warning and control circuit.
Resistance R 11 is for setting the threshold level of window, the sensitivity of the adjustable detecting device of regulating resistance R11.
When having people to walk about, will cause LED 1 and alternately flicker of LED 2 in the effective range of pyroelectricity testing circuit.
In circuit, no matter four operational amplifiers are as amplifier or comparer use, have all adopted single supply; When sensor no signal, the quiescent output voltage scope of operational amplifier IC1 is 0.4-1V; Operational amplifier IC2 is when static state, because in-phase end current potential is 2.5V, therefore direct current output level is 2.5V; The reference potential of two window comparators that consist of operational amplifier IC3 and operational amplifier IC4 is determined by the size of resistance R 10, resistance R 11 and resistance R 12.
Claims (4)
1. a human body infrared energy testing circuit, it is characterized in that, comprise pyroelectric human body infrared sensor circuit, voltage amplifier circuit and comparator circuit, described pyroelectric human body infrared sensor circuit and voltage amplifier circuit are electrically connected to, and voltage amplifier circuit and comparator circuit are electrically connected to.
2. a kind of human body infrared energy testing circuit according to claim 1, it is characterized in that, described pyroelectric human body infrared sensor circuit comprises chip PY, resistance R 1, resistance R 3, capacitor C 2, capacitor C 4 and capacitor C 5, the positive pole of capacitor C 4 and capacitor C 5 is parallel to respectively between the pin one of chip PY and one end of resistance R 3, the minus earth of the other end of capacitor C 4 and capacitor C 5; Resistance R 1 is connected with the pin two of chip PY with the one end after capacitor C 2 parallel connections, other end ground connection; Pin 3 ground connection of chip PY.
3. a kind of human body infrared energy testing circuit according to claim 2, it is characterized in that, described voltage amplifier circuit comprises operational amplifier IC1, operational amplifier IC2, resistance R 2, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 3, capacitor C 1, capacitor C 6, electrochemical capacitor C7 and capacitor C 8, the in-phase input end of operational amplifier IC1 is connected with the pin two of chip PY, resistance R 4 is connected with the inverting input of operational amplifier IC1 with the one end after capacitor C 1 parallel connection, the other end is connected with the output terminal of operational amplifier IC1, the output terminal of operational amplifier IC1 is by resistance R 5, capacitor C 6 is connected with the inverting input of operational amplifier IC2, resistance R 2 is connected with the inverting input of operational amplifier IC1 with the one end after capacitor C 3 series connection, other end ground connection, resistance R 8 is connected with the inverting input of operational amplifier IC2 with the one end after capacitor C 8 parallel connections, and the other end is connected with the output terminal of operational amplifier IC2, one end ground connection after resistance R 7 and electrochemical capacitor C7 parallel connection, the other end is connected with the other end of resistance R 3 by resistance R 6.
4. a kind of human body infrared energy testing circuit according to claim 3, it is characterized in that, described comparator circuit comprises operational amplifier IC3, operational amplifier IC4, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, electrochemical capacitor C9, diode VD1, diode VD2, LED 1 and LED 2, after being connected, the inverting input of the in-phase input end of operational amplifier IC3 and operational amplifier IC4 is connected with the output terminal of operational amplifier IC2 by resistance R 9, the inverting input of operational amplifier IC3 is connected with one end of resistance R 11 with one end of resistance R 10, the other end external power supply of resistance R 10, the output terminal of operational amplifier IC3 connects by the positive pole of diode VD1, ground connection after the negative pole of diode VD1 is connected with LED 1 with resistance R 13 successively, one end ground connection after resistance R 12 is in parallel with electrochemical capacitor C9, the other end is connected with the other end of resistance R 11, the output terminal of operational amplifier IC4 is connected with the positive pole of diode VD2, ground connection after the negative pole of diode VD2 is connected with resistance R 14, LED 2 successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420009847.1U CN203732164U (en) | 2014-01-07 | 2014-01-07 | Human body infrared energy detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420009847.1U CN203732164U (en) | 2014-01-07 | 2014-01-07 | Human body infrared energy detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203732164U true CN203732164U (en) | 2014-07-23 |
Family
ID=51202227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420009847.1U Expired - Fee Related CN203732164U (en) | 2014-01-07 | 2014-01-07 | Human body infrared energy detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203732164U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071998A (en) * | 2017-03-14 | 2017-08-18 | 陈春雷 | A kind of carry at any time can move the illumination alert device of detection human body |
| CN109541721A (en) * | 2018-11-13 | 2019-03-29 | 河南省军工电子信息科技有限公司 | Environment self-adaption vehicle is detained personnel's detection method and detection device |
-
2014
- 2014-01-07 CN CN201420009847.1U patent/CN203732164U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107071998A (en) * | 2017-03-14 | 2017-08-18 | 陈春雷 | A kind of carry at any time can move the illumination alert device of detection human body |
| CN109541721A (en) * | 2018-11-13 | 2019-03-29 | 河南省军工电子信息科技有限公司 | Environment self-adaption vehicle is detained personnel's detection method and detection device |
| CN109541721B (en) * | 2018-11-13 | 2020-09-15 | 河南省军工电子信息科技有限公司 | Environment self-adaptive vehicle detained personnel detection method and detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106354057B (en) | Photographic device | |
| CN105527336A (en) | Metal detector | |
| CN203732164U (en) | Human body infrared energy detection circuit | |
| CN206091556U (en) | Solar energy infrared early warning tent | |
| CN204989290U (en) | Wide dynamic range's high -pressure side current detection circuit | |
| CN204121016U (en) | A kind of pacing signal checkout gear for electrocardio pacemaker | |
| EP3949843A1 (en) | Precise step counting method using human body capacitance | |
| EP2466280A1 (en) | Human infrared recipient processor | |
| CN203554761U (en) | Light control circuit adopting heat radiation induction | |
| CN104931136A (en) | Wide pulse triggering-based phase-shift type high-sensitivity infrared detection system | |
| CN103674241A (en) | Photosensitive circuit for detecting photosensitive signal | |
| CN204945375U (en) | The ultrasonic ranging of pole low energy consumption, passive sensor integrative sensor | |
| US20120153150A1 (en) | Human infrared recipient processor | |
| CN203745082U (en) | Photosensitive circuit for detecting photosensitive signals | |
| CN104601122A (en) | Amplifying circuit for optical sensor of Internet of Things | |
| CN202453507U (en) | Signal processing circuit of gamma-ray counter tube | |
| CN204360499U (en) | Infrared detection alarming circuit | |
| CN202522630U (en) | Electromagnetic radiation detector | |
| CN202801610U (en) | Human body acupoint detection circuit | |
| CN204902856U (en) | Photoelectric sensor with amplifier circuit | |
| CN205229479U (en) | Wall body electric wire detector | |
| CN104458005A (en) | High-sensitivity infrared detection system based on linear driving | |
| CN205067333U (en) | Gaseous signal acquisition circuit that detects | |
| CN205720392U (en) | Non-contact zero live wire detects warning circuit and instrument automatically | |
| CN203883775U (en) | Signal amplification circuit for substation gas concentration detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20150107 |
|
| EXPY | Termination of patent right or utility model |