CN210667075U - Infrared detection alarm device based on pyroelectric - Google Patents
Infrared detection alarm device based on pyroelectric Download PDFInfo
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- CN210667075U CN210667075U CN201922470416.0U CN201922470416U CN210667075U CN 210667075 U CN210667075 U CN 210667075U CN 201922470416 U CN201922470416 U CN 201922470416U CN 210667075 U CN210667075 U CN 210667075U
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- pyroelectric infrared
- alarm device
- pyroelectric
- infrared detection
- infrared sensor
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Abstract
The utility model relates to a based on infrared detection alarm device of pyroelectric comprises optical filter, fresnel lens, pyroelectric infrared sensor, enlarged filtering module, voltage comparator, reference voltage module, host system, driver, alarm. The utility model discloses simple structure, reasonable in design provides one kind based on pyroelectric infrared detection alarm device, through pyroelectric infrared sensor output pulse signal, compares it with the benchmark value by the voltage comparator, and accurate acquisition alarm information solves current traditional alarm and has the mistake report, surveys inaccurate problem, and has very big spreading value.
Description
Technical Field
The utility model belongs to security protection control field, especially one kind is based on pyroelectric infrared detection alarm device.
Background
The infrared technology is a high and new technology for researching the production, transmission, conversion, detection and application of infrared radiation, the situation application is a main power for promoting the development of the infrared technology, in recent years, the military infrared technology gradually realizes the conversion from the viewpoint of civil departments, and the infrared technology plays an increasingly important role in the civil departments. Along with the progress of society, people have higher and higher requirements on the safety of home life, various anti-theft detectors are in due charge, but the conventional alarm has the problems of false alarm and inaccurate detection.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a based on pyroelectric infrared detection alarm device, through pyroelectric infrared sensor output pulse signal, compare it with the benchmark value by the voltage comparator, accurate acquisition alarm information solves current traditional alarm and has the false positive, surveys inaccurate problem.
The utility model provides a its technical problem take following technical scheme to realize:
the device comprises an optical filter, a Fresnel lens, a pyroelectric infrared sensor, an amplifying and filtering module, a voltage comparator, a reference voltage module, a main control module, a driver and an alarm; the optical filter is connected with the Fresnel lens; the Fresnel lens is connected with the pyroelectric infrared sensor; the pyroelectric infrared sensor is connected with the amplifying and filtering module; the amplifying and filtering module and the reference voltage module are respectively connected with a voltage comparator; the voltage comparator is connected with the main control module; the main control module is connected with the driver; the driver is connected with the alarm.
Moreover, the optical filter adopts an optical lens.
Moreover, the Fresnel lens adopts a Fresnel lens.
Besides, the pyroelectric infrared sensor adopts HN911L pyroelectric infrared sensor.
Moreover, the voltage comparator adopts an LM939 digital voltage comparator.
And the main control module adopts a SIC89C52 singlechip.
Moreover, the driver adopts an audible and visual alarm driver.
Moreover, the alarm adopts a buzzer audible and visual alarm.
The utility model discloses the advantage is with positive effect:
1. the utility model relates to a based on infrared detection alarm device of pyroelectric through pyroelectric infrared sensor output pulse signal, compares it with the benchmark value by voltage comparator, and accurate acquisition alarm information solves current traditional alarm and has the false positive, surveys not accurate problem, and has very big spreading value.
Drawings
Fig. 1 is a structural connection diagram of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 1, the pyroelectric infrared detection-based alarm device of the present invention comprises an optical filter, a fresnel lens, a pyroelectric infrared sensor, an amplifying and filtering module, a voltage comparator, a reference voltage module, a main control module, a driver, and an alarm; the optical filter is connected with the Fresnel lens; the Fresnel lens is connected with the pyroelectric infrared sensor; the pyroelectric infrared sensor is connected with the amplifying and filtering module; the amplifying and filtering module and the reference voltage module are respectively connected with a voltage comparator; the voltage comparator is connected with the main control module; the main control module is connected with the driver; the driver is connected with the alarm.
The optical lens and the Fresnel lens filter infrared light, the infrared light enters the Fresnel lens from the optical filter, the optical filter can prevent unwanted infrared rays or other light rays from entering the pyroelectric infrared sensor, the filtering wavelength of the pyroelectric infrared sensor is 14um, the radiation infrared wavelength of a human body is 10um, and the pyroelectric infrared sensor can detect whether a person enters a forbidden zone sharply. The pyroelectric infrared sensor has a polarization phenomenon and changes along with the change of temperature, but when constant infrared radiation irradiates the pyroelectric infrared sensor, the temperature of the pyroelectric infrared sensor is unchanged, the pyroelectric infrared sensor is electrically neutral externally, and the pyroelectric infrared sensor has no electric signal output, so that the constant infrared radiation is not detected. The infrared ray that the object jetted out passes through fresnel lens earlier, then reachs pyroelectric infrared sensor, and pyroelectric infrared sensor will output pulse signal this moment, and pulse signal passes through the enlarged module that filters, is compared its and the benchmark value of benchmark voltage module by the voltage comparator, and when the signal reached a definite value, the alarm sent the warning. Optical lens is in the position directly in front of pyroelectric infrared sensor, the human body of motion is in case the place ahead at lens, the infrared ray that the human body radiated out passes through optical lens back forms incessant alternating's shadow district and bright zone on pyroelectric infrared sensor, make the temperature on pyroelectric infrared sensor surface constantly change, thereby the output signal of telecommunication, fresnel lens not only can form visible area and invisible area, play the focus effect, fresnel lens is the multifocal distance, each direction can keep unanimous with the sensitivity of different distances to light, fresnel lens cooperates with pyroelectric infrared sensor, can improve the detection range, when the signal reaches a definite value, host system judges the signal, and give driver transmission instruction, report to the police by driver control alarm.
It should be emphasized that the embodiments described herein are illustrative and not restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also falls within the scope of the present invention, in any other embodiments derived by those skilled in the art according to the technical solutions of the present invention.
Claims (8)
1. The utility model provides a based on infrared detection alarm device of pyroelectric which characterized in that: the device comprises an optical filter, a Fresnel lens, a pyroelectric infrared sensor, an amplifying and filtering module, a voltage comparator, a reference voltage module, a main control module, a driver and an alarm; the optical filter is connected with the Fresnel lens; the Fresnel lens is connected with the pyroelectric infrared sensor; the pyroelectric infrared sensor is connected with the amplifying and filtering module; the amplifying and filtering module and the reference voltage module are respectively connected with a voltage comparator; the voltage comparator is connected with the main control module; the main control module is connected with the driver; the driver is connected with the alarm.
2. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the optical filter adopts an optical lens.
3. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the Fresnel lens adopts a Fresnel lens.
4. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the pyroelectric infrared sensor adopts a HN911L pyroelectric infrared sensor.
5. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the voltage comparator adopts an LM939 digital voltage comparator.
6. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the main control module adopts a SIC89C52 singlechip.
7. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the driver adopts an acousto-optic alarm driver.
8. The pyroelectric infrared detection alarm device as claimed in claim 1, wherein: the alarm adopts a buzzer audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922470416.0U CN210667075U (en) | 2019-12-31 | 2019-12-31 | Infrared detection alarm device based on pyroelectric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922470416.0U CN210667075U (en) | 2019-12-31 | 2019-12-31 | Infrared detection alarm device based on pyroelectric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210667075U true CN210667075U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922470416.0U Expired - Fee Related CN210667075U (en) | 2019-12-31 | 2019-12-31 | Infrared detection alarm device based on pyroelectric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210667075U (en) |
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2019
- 2019-12-31 CN CN201922470416.0U patent/CN210667075U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20211231 |