CN106225934A - A kind of pyroelectric sensor - Google Patents
A kind of pyroelectric sensor Download PDFInfo
- Publication number
- CN106225934A CN106225934A CN201610667509.0A CN201610667509A CN106225934A CN 106225934 A CN106225934 A CN 106225934A CN 201610667509 A CN201610667509 A CN 201610667509A CN 106225934 A CN106225934 A CN 106225934A
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- Prior art keywords
- pyroelectric sensor
- fresnel lenses
- signal
- people
- pyroelectric
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- 230000005616 pyroelectricity Effects 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 230000001960 triggered effect Effects 0.000 claims description 11
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 11
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000006698 induction Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000036760 body temperature Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A kind of pyroelectric sensor, including housing and pyroelectricity element, when pyroelectricity element testing to biological thermal source, output has people's signal, at least 3 group Fresnel Lenses it are provided with on described housing, the optical axis of Fresnel Lenses intersects at optical axes crosspoint, and optical axis is the line place straight line of Fresnel Lenses central point and luminous point.The accuracy of detection solved and the problem in dead band, improve service life and detecting effect.
Description
Technical field
The present invention relates to a kind of human body detection sensor, in particular, relate to a kind of pyroelectric sensor.
Background technology
In pyroelectric sensor, the Main Function of optical filter is only to allow wavelength infrared ray (people about 10 μm
The Infrared wavelength that body sends) pass through, and light, sunlight and other radiation are filtered, with the interference that suppression is extraneous.Infrared sense
Answering source to be generally made up of two pyroelectricity elements in series or in parallel, the electrode of the two pyroelectricity element is contrary, and environment is carried on the back
Scape radiation almost has identical effect to two pyroelectricity elements so that it is the pyroelectric effect of generation is cancelled out each other, output letter
Number it is close to zero.In once having people's intrusion detection region, human infrared radiation is focused on by partial mirror, and by pyroelectricity element
Receiving, owing to angle is different, the heat that two panels pyroelectricity element receives is different, and pyroelectricity energy is the most different, it is impossible to support completely
Disappear, after treated processing of circuit, export control signal.Pyroelectric effect is similar to piezoelectric effect, refer to the change due to temperature and
Cause the phenomenon of plane of crystal electric charge.Pyroelectric infrared sensor is made up of ceramic oxide or piezolectric crystal unit, at element
Electrode is made on two surfaces, and when in the range of Sensor monitoring, temperature has the change of △ T, pyroelectric effect can be on two electrodes
Produce electric charge △ Q, produce a faint voltage △ V the most between electrodes.Owing to its output impedance is high, in the sensor
A field effect transistor is had to carry out impedance transformation.Electric charge △ Q produced by pyroelectric effect can be combined by the ion in air and
Disappearing, i.e. when ambient temperature-stable is constant, △ T=O, sensor is without output.Human body or the bigger animal of volume have constant
Body temperature, typically at 37 degree, so the infrared ray about specific wavelength 10 μm can be sent, when human body enter detection zone, because of human body
Temperature and ambient temperature have difference, and the infrared ray about 10 μm of human-body emitting is assembled after being strengthened by Fresnel lens optical filter
On infrared induction source (pyroelectricity element), infrared induction source will lose charge balance when receiving human infrared radiation,
Outwards discharge electric charge, and then produce △ T and △ T circuit to the periphery is exported.
And optical filter i.e. Nie Feier lens, presently, there are a problem, conventional body's induction apparatus uses list mostly
Head Fresnel Lenses, is susceptible to report by mistake situation about even not reporting, poor stability, and reliability is low.
Summary of the invention
In view of this, it is an object of the present invention to provide the pyroelectric sensor of a kind of bull Nie Feier lens.
In order to solve above-mentioned technical problem, the technical scheme is that
A kind of pyroelectric sensor, including housing and pyroelectricity element, when pyroelectricity element testing to biological thermal source, output has
People's signal, described housing is provided with at least 3 group Fresnel Lenses, and the optical axis of Fresnel Lenses intersects at optical axes crosspoint, optical axis
Line place straight line for Fresnel Lenses central point Yu luminous point.By so arranging so that response accuracy improves, it is ensured that use
Environment and service life.
Further, described Fresnel Lenses is shaped as arc.Arranged by arc, improve angular field of view.
Further, described Fresnel Lenses is set to 5 groups.By so arranging, farthest ensure that use
Effect.
Further, four groups of Fresnel Lenses enclose and are located at the surrounding of another described Fresnel Lenses and are uniformly distributed and equidistantly
Arrange.Ensure that the induction precision of each angle is identical.
A kind of pyroelectric sensor assembly, including the first pyroelectric sensor and the second pyroelectric sensor, described first
Pyroelectric sensor and the second pyroelectric sensor are all identical with above-mentioned pyroelectric sensor structure, and described first pyroelectricity passes
Being also coupled to repeat circuit between sensor and the second pyroelectric sensor, described repeat circuit is configured with delay circuit, described in prolong
Time circuit configure the first Preset Time, when described first pyroelectric sensor output have people's signal time, described repeat circuit time delay
Enabling signal is exported to start described second pyroelectric sensor after first Preset Time.Owing to pyroelectric sensor can exist extremely
District, when human body proximity, will trigger a signal, subsequently enter dead band, and now human body is regardless of whether the most close, also will not
Again trigger, so, can have a negative impact, and if arranging the second pyroelectric sensor and sense as the first pyroelectricity
The dead area compensation working sensor of device, so, it is possible to improve the precision under using, and too much electricity will not be wasted.
Further, a kind of pyroelectric sensor assembly, described repeat circuit also includes edge triggered flip flop, works as repeat circuit
When output has people's signal, described in described edge triggered flip flop collection, there is people's signal.
The technology of the present invention effect major embodiment is in the following areas: the accuracy of detection of solution and the problem in dead band, improves and makes
By life-span and detecting effect.
Accompanying drawing explanation
Fig. 1: present configuration schematic diagram；
Fig. 2: circuit theory diagrams of the present invention.
Reference: 100, housing；200, pyroelectricity element；210, Fresnel Lenses；1, the first pyroelectric sensor；2、
Second pyroelectric sensor；11, edge triggered flip flop；12, delay circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in further detail, so that technical solution of the present invention is more
Should be readily appreciated that and grasp.
With reference to shown in Fig. 1, a kind of pyroelectric sensor, including housing 100 and pyroelectricity element 200, when pyroelectricity element
200 outputs when biological thermal source being detected have people's signal, and described housing 100 is provided with at least 3 group Fresnel Lenses 210, Fei Nie
You intersect at optical axes crosspoint by the optical axis of lens 210, and optical axis is the line place straight line of Fresnel Lenses 210 central point and luminous point.
By so arranging so that response accuracy improves, it is ensured that use environment and service life.Described Fresnel Lenses 210 is shaped as
Arc.Arranged by arc, improve angular field of view.Described Fresnel Lenses 210 is set to 5 groups.By so arranging,
Big degree ensure that using effect.Four groups of Fresnel Lenses 210 enclose that to be located at the surrounding of another described Fresnel Lenses 210 uniform
Distribution and spaced set.Ensure that the induction precision of each angle is identical.
With reference to shown in Fig. 2, a kind of pyroelectric sensor assembly, including the first pyroelectric sensor 1 and the second pyroelectricity biography
Sensor 2, described first pyroelectric sensor 1 is all identical with above-mentioned pyroelectric sensor structure with the second pyroelectric sensor 2,
Being also coupled to repeat circuit between described first pyroelectric sensor 1 and the second pyroelectric sensor 2, described repeat circuit configures
Delay circuit 12, described delay circuit 12 is had to configure the first Preset Time, when described first pyroelectric sensor 1 output has people to believe
Number time, after described repeat circuit time delay the first Preset Time export enabling signal to start described second pyroelectric sensor 2.By
Dead band can be there is in pyroelectric sensor, when human body proximity, a signal will be triggered, subsequently enter dead band, now human body
Regardless of whether the most close, also will not again trigger, so, can have a negative impact, and if arranging the second pyroelectricity
Sensor 2 is as the dead area compensation working sensor of the first pyroelectric sensor 1, so, it is possible to improve under using
Precision, and too much electricity will not be wasted.
Further, a kind of pyroelectric sensor assembly, described repeat circuit also includes edge triggered flip flop 11, central relay
Road output is when having people's signal, described edge triggered flip flop 11 gather described in have people's signal.Edge triggered flip flop 11 can be touched by edge
Power Generation Road realizes, and designs, if the first pyroelectric sensor 1 is high level according to the triggering mode of the first pyroelectric sensor 1
Trigger, then edge triggered flip flop 11 should be rising edge and triggers circuit, and delay circuit 12 can be realized by 555 enumerators,
Can also realize by the way of crystal oscillator linkage counter, relatively simple, and so, the most such as: Dead Time is set
It it is 30 seconds.Human body starts timing after entering induction apparatus area triggering warning system, has people to enter and will not trigger sensing in 30 seconds
Alarm device.5 seconds the most on triggering, another pyroelectric sensor triggered, and at Dead Time, the second pyroelectric sensor 2 enters
Row judges, is that result is more accurate.
Certainly, being more than the representative instance of the present invention, in addition, the present invention can also have other multiple to be embodied as
The technical scheme that mode, all employing equivalents or equivalent transformation are formed, within all falling within the scope of protection of present invention.
Claims (6)
1. a pyroelectric sensor, including housing and pyroelectricity element, the output when pyroelectricity element testing to biological thermal source
Someone signal, it is characterised in that being provided with at least 3 group Fresnel Lenses on described housing, the optical axis of Fresnel Lenses intersects at
Optical axes crosspoint, optical axis is the line place straight line of Fresnel Lenses central point and luminous point.
2. pyroelectric sensor as claimed in claim 1, it is characterised in that described Fresnel Lenses is shaped as arc.
3. pyroelectric sensor as claimed in claim 1, it is characterised in that described Fresnel Lenses is set to 5 groups.
4. pyroelectric sensor as claimed in claim 3, it is characterised in that four groups of Fresnel Lenses enclose and are located at another described phenanthrene
The surrounding of Nie Er lens is uniformly distributed and spaced set.
5. a pyroelectric sensor assembly, including the first pyroelectric sensor and the second pyroelectric sensor, described first warm
Release electric transducer and the second pyroelectric sensor all with the pyroelectric sensor structure phase as described in claim 1-4 any one
With, it being also coupled to repeat circuit between described first pyroelectric sensor and the second pyroelectric sensor, described repeat circuit is joined
Being equipped with delay circuit, described delay circuit configures the first Preset Time, when described first pyroelectric sensor output has people's signal
Time, export enabling signal after described repeat circuit time delay the first Preset Time to start described second pyroelectric sensor.
6. a kind of pyroelectric sensor assembly as claimed in claim 5, described repeat circuit also includes edge triggered flip flop, central
When the output of relay road has people's signal, described in described edge triggered flip flop collection, there is people's signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610667509.0A CN106225934A (en) | 2016-08-15 | 2016-08-15 | A kind of pyroelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610667509.0A CN106225934A (en) | 2016-08-15 | 2016-08-15 | A kind of pyroelectric sensor |
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| CN106225934A true CN106225934A (en) | 2016-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610667509.0A Pending CN106225934A (en) | 2016-08-15 | 2016-08-15 | A kind of pyroelectric sensor |
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| CN (1) | CN106225934A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018161724A1 (en) * | 2017-03-09 | 2018-09-13 | 苏州欧普照明有限公司 | Pyroelectric infrared sensor-based lighting control device and system |
| CN111095031A (en) * | 2017-09-12 | 2020-05-01 | 三菱电机株式会社 | Human body detection device and illumination device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5107120A (en) * | 1989-09-22 | 1992-04-21 | Pennwalt Corporation | Passive infrared detector |
| CN201903401U (en) * | 2010-12-02 | 2011-07-20 | 赵建国 | Pyroelectric sensor packaging structure |
| CN102466522A (en) * | 2010-11-09 | 2012-05-23 | 南阳森霸光电有限公司 | Pyroelectric infrared sensor |
| CN204705732U (en) * | 2015-06-10 | 2015-10-14 | 上海尼赛拉传感器有限公司 | A kind of Fresnel Lenses of pyroelectric infrared sensor |
-
2016
- 2016-08-15 CN CN201610667509.0A patent/CN106225934A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5107120A (en) * | 1989-09-22 | 1992-04-21 | Pennwalt Corporation | Passive infrared detector |
| CN102466522A (en) * | 2010-11-09 | 2012-05-23 | 南阳森霸光电有限公司 | Pyroelectric infrared sensor |
| CN201903401U (en) * | 2010-12-02 | 2011-07-20 | 赵建国 | Pyroelectric sensor packaging structure |
| CN204705732U (en) * | 2015-06-10 | 2015-10-14 | 上海尼赛拉传感器有限公司 | A kind of Fresnel Lenses of pyroelectric infrared sensor |
Non-Patent Citations (1)
| Title |
|---|
| 罗志增 等编著: "《测试技术与传感器》", 31 March 2008, 西安电子科技大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018161724A1 (en) * | 2017-03-09 | 2018-09-13 | 苏州欧普照明有限公司 | Pyroelectric infrared sensor-based lighting control device and system |
| US10980095B2 (en) | 2017-03-09 | 2021-04-13 | Opple Lighting Co., Ltd. | Pyroelectric infrared sensor based lighting control device and system |
| CN111095031A (en) * | 2017-09-12 | 2020-05-01 | 三菱电机株式会社 | Human body detection device and illumination device |
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Application publication date: 20161214 |