CN203324493U - Infrared detector - Google Patents
Infrared detector Download PDFInfo
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- CN203324493U CN203324493U CN201320405806XU CN201320405806U CN203324493U CN 203324493 U CN203324493 U CN 203324493U CN 201320405806X U CN201320405806X U CN 201320405806XU CN 201320405806 U CN201320405806 U CN 201320405806U CN 203324493 U CN203324493 U CN 203324493U
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Abstract
The utility model relates to an infrared detector, which has the main technical characteristics that the infrared detector is composed of a Fresnel lens, an infrared sensor, a current-voltage converter, a voltage amplifier, a signal processor and a sound-light alarm, wherein the Fresnel lens is located right in front of the infrared sensor, the infrared sensor is connected with the current-voltage converter, the voltage-current converter is connected with the voltage amplifier, the voltage amplifier is connected with the signal processor, and the signal processor is connected with the sound-light alarm. The infrared detector provided by the utility model is reasonable in design, amplified voltage signals are sampled and converted into frequency domain signals, frequency components with large amplitude are analyzed, and an alarm is given out if an alarm threshold is reached. Compared with an existing infrared detector, the infrared detector provided by the utility model has more accurate and stronger detection and anti-interference and false alarm resisting capacities.
Description
Technical field
The utility model belongs to the safety precaution field, especially a kind of infrared eye.
Background technology
In the past few years, along with the deep development of reform and opening-up, the with rapid changepl. never-ending changes and improvements and mankind's of electronic technology continuous research, the raising of living standards of the people and the continuous enhancing that the private property security protection is realized, the application of the antitheft series of household safe is increasingly extensive.Therefore, family electric theft-proof system occurs in order to meet the antitheft needs of Modern Residence.In view of equipment in the market mainly contain the various alarms such as pressure activated formula burglar alarm, switch electronic burglar alarm and pressure lucifuge triggering type anti-theft alarming device all exist disguised bad, cost is high, the more high shortcomings of rate of false alarm.For above situation, some producer has proposed a kind of pyroelectric infrared sensor, it can detect with the noncontact form infrared ray of human body radiation, and this is converted into to voltage signal, then reported to the police, but seen infrared eye is by setting an alarming threshold value, report to the police when the voltage signal after amplification reaches this value, and the background noise be superimposed upon in useful signal may causing false alarm at present.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides voltage signal after a kind of amplify through sampling and convert to frequency-region signal, and the radio-frequency component that the analysis amplitude is larger, if reach the infrared eye that alarming threshold value reports to the police; It has more accurately, stronger detection and anti-interference, anti-wrong report ability.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of infrared eye, its technical characteristics is: Fresnel Lenses, infrared sensor, current-to-voltage converter, voltage amplifier, signal processor and audible-visual annunciator, consist of; Wherein, described Fresnel Lenses is positioned at the dead ahead of infrared sensor, and described infrared sensor connects current-to-voltage converter, and described voltage to current converter connects voltage amplifier, described voltage amplifier is connected with signal processor, and described signal processor is connected with audible-visual annunciator.
And described infrared sensor adopts the pyroelectricity element.
And described pyroelectricity element adopts the pyroelectricity element that comprises two mutual serial or parallel connections.
And described signal processor comprises frequency analyzer and decision circuit, and frequency analyzer is connected with decision circuit.
Advantage of the present utility model and good effect are:
1, the utility model adopts the frequecy characteristic that pyroscan is designed to have human motion, and it has its emission band center greatly about the feature of the bandpass filter at 1 hertz of place.So, strengthened the susceptibility to human body, and made to be prevented by the caused misoperation of signal with the irrelevant frequency of human motion.
2, the utility model is reasonable in design, voltage signal after amplification is through sampling and convert to frequency-region signal, the larger radio-frequency component by the analysis amplitude, if reaching alarming threshold value is reported to the police, it is compared with existing infrared eye, has more accurately, stronger detection and anti-interference, anti-wrong report ability.
The accompanying drawing explanation
Fig. 1 is system architecture diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described.
Infrared eye, as shown in Figure 1: by Fresnel Lenses, infrared sensor, current-to-voltage converter, voltage amplifier, signal processor and audible-visual annunciator, formed; Wherein, described Fresnel Lenses is positioned at the dead ahead of infrared sensor, and described infrared sensor connects current-to-voltage converter, and described voltage to current converter connects voltage amplifier, described voltage amplifier is connected with signal processor, and described signal processor is connected with audible-visual annunciator.
In conjunction with Fig. 1, set forth principle of work of the present utility model: infrared eye is mainly to have judged whether that according to the variation of extraneous infrared energy the people is moving.Infrared energy and the environment of human body have difference, when the people passes through search coverage, and the change in location of this different infrared energy that alarm is collected, and then send warning by analysis.Human body has constant body temperature, generally, in 37 about degree, can send the infrared ray of 10 microns left and right of specific wavelength, and infrared eye carries out work by the infrared ray of 10 microns left and right of detection human-body emitting.
After the optical filter enhancing of the infrared ray of 10 microns left and right of human-body emitting by Fresnel Lenses, gather on the induction source of infrared sensor.The induction source of infrared sensor adopts the pyroelectricity element usually, this pyroelectricity element will lose charge balance receiving when the human infrared radiation temperature changes, outwards discharge electric charge, subsequent conditioning circuit just can produce after processing after testing and mean that human body exists or mobile detection signal, produce alerting signal when this detection signal reaches alarming threshold value, reported to the police by audible-visual annunciator.
The pyroelectricity element is widely used in detecting the infrared ray from human body radiation.The thermoelectric element group output electric current corresponding with infrared radiation for each monitored area.So, in pyroscan, current-to-voltage converter becomes voltage to current transformation, voltage amplifier amplifies voltage.
Frequency analyzer, it carries out frequency analysis to the output signal of voltage amplifier; Decision circuit, its frequency based on being obtained by frequency analyzer forms to detect the waveform produced by human body.And only have just to export when the waveform produced by human body being detected by wave form analysis and be illustrated in the detection signal that in monitored area, human body exists or moves.
Described infrared sensor comprises the pyroelectricity element of two serial or parallel connections, described pyroelectricity component polarity is contrary, when human body is still in the monitored area of infrared sensor, shining two infrared ray luminous energy energy on the hot type electric device equates, and reach balance, the polarity of its generation is contrary, the photocurrent that energy is equal is cancelled out each other in loop, therefore infrared sensor does not have signal output, in like manner, under sunlight or light, the speed moved because of sunlight is very slow, infrared ray luminous energy energy on two pyroelectricity elements still can regard equal as, and cancel out each other in loop, the response frequency of adding infrared sensor is very low, is generally the 0.1-10 hertz, and infrared sensor is very narrow to the sensitive range of infrared light wavelength, is generally the 5-15 micron, and therefore, infrared sensor is insensitive to them.
When the temperature that causes infrared sensor itself when variation of ambient temperature changes, because two pyroelectricity elements are made on same silicon wafer, the photocurrent that the polarity that he produces is contrary, energy is equal is still cancelled out each other in loop, the infrared sensor no-output.
Once in people's intrusion detection zone, human infrared radiation focuses on by partial mirror, and is received by the pyroelectricity element, but two heat differences that the pyroelectricity element receives, and pyroelectricity also difference can not be offset, and through signal, processes and reports to the police.
It is emphasized that; embodiment described in the utility model is illustrative; rather than determinate; therefore the utility model is not limited to the embodiment described in embodiment; every other embodiments that drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope that the utility model is protected equally.
Claims (4)
1. infrared eye, its technical characteristics is: Fresnel Lenses, infrared sensor, current-to-voltage converter, voltage amplifier, signal processor and audible-visual annunciator, consist of; Wherein, described Fresnel Lenses is positioned at the dead ahead of infrared sensor, and described infrared sensor connects current-to-voltage converter, and described voltage to current converter connects voltage amplifier, described voltage amplifier is connected with signal processor, and described signal processor is connected with audible-visual annunciator.
2. infrared eye according to claim 1, is characterized in that: described infrared sensor employing pyroelectricity element.
3. infrared eye according to claim 2, is characterized in that: the pyroelectricity element that described pyroelectricity element employing comprises two mutual serial or parallel connections.
4. infrared eye according to claim 1, it is characterized in that: described signal processor comprises frequency analyzer and decision circuit, and frequency analyzer is connected with decision circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405806XU CN203324493U (en) | 2013-07-09 | 2013-07-09 | Infrared detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405806XU CN203324493U (en) | 2013-07-09 | 2013-07-09 | Infrared detector |
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| CN203324493U true CN203324493U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320405806XU Expired - Fee Related CN203324493U (en) | 2013-07-09 | 2013-07-09 | Infrared detector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021641A (en) * | 2014-06-26 | 2014-09-03 | 范黎明 | Security detection device of transformer substation |
| CN105374149A (en) * | 2015-10-30 | 2016-03-02 | 苏州扬佛自动化设备有限公司 | Security and protection system for transformer station |
| CN107747970A (en) * | 2017-09-30 | 2018-03-02 | 温州华侨电器有限公司 | A kind of automobile sensor |
| CN107764322A (en) * | 2017-09-30 | 2018-03-06 | 温州华侨电器有限公司 | A kind of new automobile sensor |
| CN107807403A (en) * | 2017-12-05 | 2018-03-16 | 中磊电子（苏州）有限公司 | For reducing the moving sensing method and moving sensing device of false alarm |
| CN110150908A (en) * | 2018-03-09 | 2019-08-23 | 广州华金科技有限公司 | A kind of showcase with intelligent display screen |
-
2013
- 2013-07-09 CN CN201320405806XU patent/CN203324493U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021641A (en) * | 2014-06-26 | 2014-09-03 | 范黎明 | Security detection device of transformer substation |
| CN105374149A (en) * | 2015-10-30 | 2016-03-02 | 苏州扬佛自动化设备有限公司 | Security and protection system for transformer station |
| CN107747970A (en) * | 2017-09-30 | 2018-03-02 | 温州华侨电器有限公司 | A kind of automobile sensor |
| CN107764322A (en) * | 2017-09-30 | 2018-03-06 | 温州华侨电器有限公司 | A kind of new automobile sensor |
| CN107807403A (en) * | 2017-12-05 | 2018-03-16 | 中磊电子（苏州）有限公司 | For reducing the moving sensing method and moving sensing device of false alarm |
| CN107807403B (en) * | 2017-12-05 | 2020-02-14 | 中磊电子（苏州）有限公司 | Motion sensing method and motion sensor for reducing false alarms |
| CN110150908A (en) * | 2018-03-09 | 2019-08-23 | 广州华金科技有限公司 | A kind of showcase with intelligent display screen |
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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: 20131204 Termination date: 20140709 |
|
| EXPY | Termination of patent right or utility model |