CN106370313A - MCU type intelligent PIR sensor signal processing device - Google Patents
MCU type intelligent PIR sensor signal processing device Download PDFInfo
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- CN106370313A CN106370313A CN201611080531.1A CN201611080531A CN106370313A CN 106370313 A CN106370313 A CN 106370313A CN 201611080531 A CN201611080531 A CN 201611080531A CN 106370313 A CN106370313 A CN 106370313A
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- 238000012545 processing Methods 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000003672 processing method Methods 0.000 claims description 7
- 230000006870 function Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000005616 pyroelectricity Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
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- 230000037081 physical activity Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
Classifications
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- 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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
-
- 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
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention discloses an MCU type intelligent PIR sensor signal processing device which comprises an ultrahigh input impedance interface circuit, a Sigma-Delta type ADC, a digital bandpass filter, a microprocessor, an I2C interface circuit, a band gap reference circuit, a high-speed oscillator and a low-speed oscillator. A signal of a PIR sensor is sequentially processed through the ultrahigh input impedance interface circuit, the Sigma-Delta type ADC, the digital bandpass filter and the microprocessor; the microprocessor processes output data of the digital bandpass filter, and advanced filtering and functional control are achieved in a software mode. The I2C interface circuit is connected with and communicated with other peripheral hosts, and intelligent processing and control are achieved. By means of the MCU type intelligent PIR sensor signal processing device, an application circuit can be simplified, systems stability can be improved, and intelligentization and microminiaturization of equipment in the smart home field in the Internet of Things are achieved.
Description
Technical field
The present invention relates to integrated circuit is and in particular to a kind of human body pyroelectricity sensor signal intelligent processing method and dress
Put.
Background technology
At present, Internet of Things industry is one of strategic high ground of current world economy and development in science and technology, and technology of Internet of things covers
Lid is from the various applications of sensor, controller to cloud computing.Smart home be Internet of Things important component part and developing direction it
One, smart home passes through technology of Internet of things by the various equipment (as audio ＆ video equipment, illuminator, network home appliance etc.) in family even
It is connected to together, home wiring control, Lighting control etc. are provided.
Pyroelectric infrared sensor at normal temperatures being capable of the mobile source of infrared radiation in effective detection sensitizing range.This technology
It is highly suitable to be applied for the smart home field in Internet of Things, for detecting physical activity, realize various Automated condtrol.Common
The illumination of such as home furnishings intelligent, corridor automatic switch, burglar alarm, and more intelligentized Automated condtrol, such as: work as room
Between unmanned activity when be automatically switched off air conditioner；Closing television machine etc. after the unmanned viewing in parlor or spectators have been fallen asleep.
Pyroelectric sensor signal (pir signal) processing system in the market is substantially " pir special chip+logical
With mcu chip+numerous resistance capacitances " realizing, as shown in Figure 1.With the development trend of smart machine miniaturization, smart home
Also gradually develop towards miniaturization direction.And pir signal processing system ordinary construction that traditional approach is realized is complicated and volume relatively
Greatly, the application requirement of smart home miniaturization can not have been met.
Content of the invention
For the deficiencies in the prior art, present invention is primarily targeted at: solve sensor signal particularly pyroelectricity red
Outer sensor signal intelligent process, the problem of system miniaturization.
For realizing object defined above, the invention discloses a kind of mcu type intelligence pir sensor signal processing meanss, described dress
Put including ultra-high input impedance interface circuit, sigma-delta type adc, digital band-pass filter, microprocessor, i2c interface
Circuit, band-gap reference circuit, high-speed oscillator and low speed oscillator；
Pir sensor signal passes sequentially through ultra-high input impedance interface circuit, sigma-delta type adc, digital band pass filter
Ripple device and microprocessor processed after output；
Wherein,
Described band-gap reference circuit and high-speed oscillator, low speed oscillator are connected with sigma-delta type adc, band gap base
Quasi- circuit is sigma-delta type adc and high-speed oscillator, low speed oscillator provide reference voltage and electric current, high-speed oscillator
There is provided clock with low speed oscillator for sigma-delta type adc, digital band-pass filter and microprocessor；
Data processing software is included, at the output data to digital band-pass filter in described microprocessor
Reason；
Described i2c interface circuit is connected with microprocessor, for being connected with peripheral hosts, communicating, realize intelligent processing method,
Control.
Preferably, the described output data to digital band-pass filter carries out process inclusion and carries out senior filtering and function control
System.
Preferably, described device also includes electrification reset circuit and power-off reset circuit.
Preferably, described ultra-high input impedance interface circuit is difference type ultra-high input impedance interface circuit.
Preferably, described sigma-delta type adc is 16 adc.
Preferably, described digital band-pass filter is Butterworth filter.
Preferably, described microprocessor adopts 8 reduced instruction set computer mcu kernels.
Preferably, the effective bandwidth of described digital band-pass filter is 0.4hz～7hz.
Preferably, described microprocessor comprises the rom of 2k and the ram memory space of 256 bytes.
Compared with prior art, it is an advantage of the current invention that: a kind of mcu type intelligence pir sensor letter disclosed by the invention
Number processing meanss, can realize the intelligent processing method real to signal using software.Meanwhile, a large amount of system peripherals assistors are reduced
Part, simplifies application circuit, improves system stability, reduces system power dissipation, reduces product cost, realizes smart machine control simple
Change, be miniaturized.
Brief description
Fig. 1 is current pir signal processing system schematic diagram；
Fig. 2 is a kind of Organization Chart of pir sensor signal Intelligent treatment device that one embodiment of the invention proposes；
Fig. 3 be one embodiment of the invention propose pir sensor signal Intelligent treatment device implement schematic diagram.
Specific embodiment
In view of deficiency of the prior art, inventor, through studying for a long period of time and putting into practice in a large number, is proposed the present invention's
Technical scheme.This technical scheme, its implementation process and principle etc. will be further explained as follows.
Fig. 2 is a kind of Organization Chart of pir sensor signal Intelligent treatment device that the embodiment of the present invention proposes, as Fig. 2 institute
Show, embodiment of the present invention described device includes: ultra-high input impedance interface circuit, sigma-delta type adc, digital band pass filter
Ripple device, microprocessor (mcu), i2c interface circuit, band-gap reference circuit, high-speed oscillator osc and low speed oscillator osc.pir
After signal input, sequentially pass through ultra-high input impedance interface circuit, sigma-delta type adc, digital band-pass filter and micro-
Processor exports after being processed, to carry out follow-up Based Intelligent Control operation.Wherein:
Coupling of sensor small-signal and apparatus of the present invention mainly realized by ultra-high input impedance interface circuit, reduces as far as possible
The decay of sensor small-signal；
Sigma-delta type adc is used for analog digital conversion, sensor analog signals is changed into digital signal, after facilitating
Level processing of circuit；
Digital band-pass filter realizes the filtering to signal, for filtering the noise outside effective signal bandwidth it is ensured that counting
Word signal accurately reflects the change of sensor analog signals；
Microprocessor onboard data processes software, the output data of digital band-pass filter is processed, using software
Mode realizes senior filtering and function control；
I2c interface circuit is realized embodiment of the present invention described device and is connected with other peripheral hosts, communicates, and realizes intelligent
Process, control；
Band-gap reference circuit is sigma-delta type adc and high-speed oscillator, low speed oscillator provide reference voltage and electricity
Stream；
High-speed oscillator and low speed oscillator provide for sigma-delta type adc, digital band-pass filter and microprocessor
Clock.
A series of transmission conversion and data processing are carried out by embodiment of the present invention described device to sensor signal, and
It is connected with peripheral hardware in conjunction with i2c interface so that apparatus of the present invention can realize the real intelligent processing method of sensor signal, thus real
The Core Feature of the existing application such as Internet of Things, smart home.
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing and be embodied as
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only in order to explain this
Bright, it is not intended to limit the present invention.
Fig. 3 be one embodiment of the invention propose pir sensor signal Intelligent treatment device implement schematic diagram, such as
Shown in Fig. 3, this is realized device and includes: difference type ultra-high input impedance interface circuit, 16 sigma-delta types adc, Barts irrigate
This wave filter, 8-bit microprocessor, i2c interface circuit, band-gap reference circuit, high-speed oscillator, low speed oscillator, electrification reset
Circuit por and power-off reset circuit bor.
Pir sensor signal is connected with difference type ultra-high input impedance interface circuit by in+ with in- end, and difference type surpasses
High input impedance interface circuit is mainly used in realizing the direct-coupling transmission of sensor small-signal and apparatus of the present invention, subtracts as far as possible
The decay of little sensor small-signal or reflection.Sensor signal produces signal ain after the linking of interface circuit, directly send
Adc process to subordinate.
Using 16 sigma-delta types adc of high-performance and difference type ultra-high input impedance interface circuit direct-coupling, 16
Sensor analog signals ain is changed into digital signal din by position sigma-delta type adc.Sigma-delta type adc can will be made an uproar
Sound high frequency, can identify very faint sensor signal after low-pass filtering, and signal din is a string continuous binary system
Code, it comprises useful signal and noise.
Digital band-pass filter adopts Butterworth filter, and effective bandwidth is 0.4hz～7hz, can be by useful signal band
Noise outside width filters it is ensured that digital signal accurately reflects the change of the analogue signal of sensor generation.Binary code din passes through
Butterworth filter forms the digital signal bpf<15:0 of 16 after processing>.
Microprocessor is processed to output signal bpf<15:0>of Butterworth filter, at built-in data
Reason software realizes senior filtering and function control.Described microprocessor adopt 8 reduced instruction set computer mcu kernels, the rom containing 2k and
The ram memory space of 256 bytes.
I2c interface circuit is used for being connected with other peripheral hosts, communicating, and realizes intelligent processing method, control.
Can become apparent from learning by above-described embodiment, a kind of mcu type intelligence pir sensor that the embodiment of the present invention proposes
Signal processing apparatus, embedded micro-processor, the real intelligent processing method of signal is realized using software mode, and reduces a large amount of systems
Peripheral additional device, simplifies application circuit, improves system stability, simplifies, is miniaturized thus realizing smart machine and controlling.
It should be appreciated that above-described embodiment technology design only to illustrate the invention and feature, its object is to allow and be familiar with this
The personage of item technology will appreciate that present disclosure and implements according to this, can not be limited the scope of the invention with this.All
The equivalence changes made according to spirit of the invention or modification, all should be included within the scope of the present invention.
Claims (9)
1. a kind of mcu type intelligence pir sensor signal processing meanss it is characterised in that:
Described device includes ultra-high input impedance interface circuit, sigma-delta type adc, digital band-pass filter, microprocessor
Device, i2c interface circuit, band-gap reference circuit, high-speed oscillator and low speed oscillator；
Pir sensor signal passes sequentially through ultra-high input impedance interface circuit, sigma-delta type adc, digital band-pass filter
And microprocessor processed after output；
Wherein,
Described band-gap reference circuit and high-speed oscillator, low speed oscillator are connected with sigma-delta type adc, band-gap reference electricity
Road is sigma-delta type adc and high-speed oscillator, low speed oscillator provides reference voltage and electric current, high-speed oscillator and low
Fast agitator provides clock for sigma-delta type adc, digital band-pass filter and microprocessor；
Include data processing software in described microprocessor, for processing to the output data of digital band-pass filter；
Described i2c interface circuit is connected with microprocessor, for being connected with peripheral hosts, communicating, realizes intelligent processing method, control
System.
2. mcu type according to claim 1 intelligence pir sensor signal processing meanss it is characterised in that: described to numeral
The output data of band filter carries out process inclusion and carries out senior filtering and function control.
3. mcu type according to claim 1 intelligence pir sensor signal processing meanss it is characterised in that: described device is also
Including electrification reset circuit and power-off reset circuit.
4. mcu type according to claim 1 intelligence pir sensor signal processing meanss it is characterised in that: described superelevation is defeated
Entering impedance interfaces circuit is difference type ultra-high input impedance interface circuit.
5. mcu type according to claim 1 intelligence pir sensor signal processing meanss it is characterised in that: described sigma-
Delta type adc is 16 adc.
6. mcu type according to claim 1 intelligence pir sensor signal processing meanss it is characterised in that: described number tape
Bandpass filter is Butterworth filter.
7. mcu type according to claim 1 intelligence pir sensor signal processing meanss it is characterised in that: described microprocessor
Device adopts 8 reduced instruction set computer mcu kernels.
8. mcu type according to claim 6 intelligence pir sensor signal processing meanss it is characterised in that: described number tape
The effective bandwidth of bandpass filter is 0.4hz～7hz.
9. mcu type according to claim 7 intelligence pir sensor signal processing meanss it is characterised in that: described microprocessor
Device comprises the rom of 2k and the ram memory space of 256 bytes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080531.1A CN106370313B (en) | 2016-11-30 | 2016-11-30 | MCU type intelligent PIR sensor signal processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080531.1A CN106370313B (en) | 2016-11-30 | 2016-11-30 | MCU type intelligent PIR sensor signal processing device |
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| Publication Number | Publication Date |
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| CN106370313A true CN106370313A (en) | 2017-02-01 |
| CN106370313B CN106370313B (en) | 2023-09-08 |
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| CN201611080531.1A Active CN106370313B (en) | 2016-11-30 | 2016-11-30 | MCU type intelligent PIR sensor signal processing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1512152A (en) * | 2002-12-30 | 2004-07-14 | 欣全实业股份有限公司 | Digital control type thermoelectric sensing signal sampling circuit |
| CN1619577A (en) * | 1999-05-25 | 2005-05-25 | 西尔弗布鲁克研究股份有限公司 | Sensing device with processor |
| JP2013088427A (en) * | 2011-10-17 | 2013-05-13 | yun fei Li | Digital type human body infrared receiver |
| US20130178179A1 (en) * | 2012-01-11 | 2013-07-11 | Electronics And Telecommunications Research Institute | Subsampling receiver using interstage off-chip rf band pass filter |
| CN206208394U (en) * | 2016-11-30 | 2017-05-31 | 苏州华芯微电子股份有限公司 | MCU type intelligent PI R sensor signal processing units |
-
2016
- 2016-11-30 CN CN201611080531.1A patent/CN106370313B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619577A (en) * | 1999-05-25 | 2005-05-25 | 西尔弗布鲁克研究股份有限公司 | Sensing device with processor |
| CN1512152A (en) * | 2002-12-30 | 2004-07-14 | 欣全实业股份有限公司 | Digital control type thermoelectric sensing signal sampling circuit |
| JP2013088427A (en) * | 2011-10-17 | 2013-05-13 | yun fei Li | Digital type human body infrared receiver |
| US20130178179A1 (en) * | 2012-01-11 | 2013-07-11 | Electronics And Telecommunications Research Institute | Subsampling receiver using interstage off-chip rf band pass filter |
| CN206208394U (en) * | 2016-11-30 | 2017-05-31 | 苏州华芯微电子股份有限公司 | MCU type intelligent PI R sensor signal processing units |
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| CN106370313B (en) | 2023-09-08 |
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Effective date of registration: 20180808 Address after: 215000 198 Xiangyang Road, Suzhou hi tech Zone, Jiangsu Applicant after: SUZHOU HUAXIN MICRO-ELECTRONICS Co.,Ltd. Applicant after: SENBA SENSING TECHNOLOGY Co.,Ltd. Address before: 215011 198 Xiangyang Road, Suzhou hi tech Zone, Jiangsu Applicant before: SUZHOU HUAXIN MICRO-ELECTRONICS Co.,Ltd. |
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