CN106370313B - MCU type intelligent PIR sensor signal processing device - Google Patents
MCU type intelligent PIR sensor signal processing device Download PDFInfo
- Publication number
- CN106370313B CN106370313B CN201611080531.1A CN201611080531A CN106370313B CN 106370313 B CN106370313 B CN 106370313B CN 201611080531 A CN201611080531 A CN 201611080531A CN 106370313 B CN106370313 B CN 106370313B
- Authority
- CN
- China
- Prior art keywords
- sensor signal
- pir sensor
- microprocessor
- mcu
- signal processing
- 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.)
- Active
Links
- 238000012545 processing Methods 0.000 title claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000006870 function Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 206010063385 Intellectualisation Diseases 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000037081 physical activity Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 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
- G01J5/10—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
Abstract
The invention discloses a signal processing device of an MCU type intelligent PIR sensor, which comprises: ultra-high input impedance interface circuits, sigma-Delta ADC, digital bandpass filter, microprocessor, I2C interface circuits, bandgap reference circuits, high-speed oscillators and low-speed oscillators. The PIR sensor signal is processed by an ultra-high input impedance interface circuit, a Sigma-Delta type ADC, a digital band-pass filter and a microprocessor in sequence; the microprocessor processes the output data of the digital band-pass filter and adopts a software mode to realize advanced filtering and function control; the I2C interface circuit is connected and communicated with other peripheral hosts, and intelligent processing and control are realized. By adopting the MCU type intelligent PIR sensor signal processing device disclosed by the invention, an application circuit can be simplified, the system stability is improved, and the intellectualization and microminiaturization of equipment in the field of intelligent home in the Internet of things are realized.
Description
Technical Field
The invention relates to an integrated circuit, in particular to an intelligent processing method and device for human body pyroelectric sensor signals.
Background
At present, the internet of things industry is one of the strategic high points of economic and technological development in the world today, and the internet of things technology covers various applications from sensors, controllers to cloud computing. The intelligent home is one of important components and development directions of the Internet of things, and the intelligent home connects various devices (such as audio and video devices, a lighting system, network home appliances and the like) in the home together through the Internet of things technology to provide home appliance control, lighting control and the like.
The pyroelectric infrared sensor can effectively detect a moving infrared radiation source in a sensitive area at normal temperature. The technology is very suitable for being applied to the field of intelligent home in the Internet of things, is used for detecting human body activities and realizes various automatic control. Common, such as intelligent lighting in home, automatic switching in corridor, burglar alarm, and more intelligent automatic control, such as: automatically closing the air conditioner when no person is moving in the room; turning off the television after no one views or the viewer has fallen asleep in the living room, etc.
The pyroelectric sensor signal (PIR signal) processing system in the market at present is basically realized by a PIR special chip, a universal MCU chip and a plurality of resistors and capacitors, as shown in fig. 1. Along with the development trend of miniaturization of intelligent equipment, intelligent home also gradually develops towards the miniaturization direction. The PIR signal processing system implemented in the conventional manner is generally complex in structure and large in size, and cannot meet the application requirements of miniaturization of intelligent households.
Disclosure of Invention
In view of the shortcomings of the prior art, the main purpose of the invention is as follows: the method solves the problems of intelligent processing of sensor signals, particularly pyroelectric infrared sensor signals and microminiaturization of the system.
To achieve the foregoing object, the present invention discloses a signal processing device of an MCU-type intelligent PIR sensor, the device comprising: the system comprises an ultra-high input impedance interface circuit, a Sigma-Delta type ADC, a digital band-pass filter, a microprocessor, an I2C interface circuit, a band-gap reference circuit, a high-speed oscillator and a low-speed oscillator;
the PIR sensor signal sequentially passes through an ultra-high input impedance interface circuit, a Sigma-Delta type ADC, a digital band-pass filter and a microprocessor for processing and outputting;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the band gap reference circuit and the high-speed oscillator and the low-speed oscillator are connected with the Sigma-Delta type ADC, the band gap reference circuit provides reference voltage and current for the Sigma-Delta type ADC, the high-speed oscillator and the low-speed oscillator, and the high-speed oscillator and the low-speed oscillator provide clocks for the Sigma-Delta type ADC, the digital band-pass filter and the microprocessor;
the microprocessor comprises data processing software which is used for processing the output data of the digital band-pass filter;
the I2C interface circuit is connected with the microprocessor and is used for being connected and communicated with a peripheral host to realize intelligent processing and control.
Preferably, the processing of the output data of the digital band-pass filter includes advanced filtering and functional control.
Preferably, the apparatus further comprises a power-on reset circuit and a power-off reset circuit.
Preferably, the ultra-high input impedance interface circuit is a differential ultra-high input impedance interface circuit.
Preferably, the Sigma-Delta ADC is a 16-bit ADC.
Preferably, the digital band-pass filter is a butterworth filter.
Preferably, the microprocessor employs an 8-bit reduced instruction set MCU core.
Preferably, the effective bandwidth of the digital band-pass filter is 0.4 Hz-7 Hz.
Preferably, the microprocessor contains 2K ROM and 256 bytes of RAM memory.
Compared with the prior art, the invention has the advantages that: the signal processing device of the MCU type intelligent PIR sensor can realize real intelligent processing of signals by adopting software. Meanwhile, a large number of peripheral auxiliary devices of the system are reduced, an application circuit is simplified, system stability is improved, system power consumption is reduced, product cost is reduced, and control simplicity and miniaturization of the intelligent equipment are realized.
Drawings
FIG. 1 is a schematic diagram of a current PIR signal processing system;
FIG. 2 is a schematic diagram of an intelligent PIR sensor signal processing device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a specific implementation of a PIR sensor signal intelligent processing device according to an embodiment of the present invention.
Detailed Description
In view of the shortcomings in the prior art, the inventor of the present invention has long studied and practiced in a large number of ways to propose the technical scheme of the present invention. The technical scheme, the implementation process, the principle and the like are further explained as follows.
Fig. 2 is a schematic diagram of an intelligent PIR sensor signal processing device according to an embodiment of the present invention, where, as shown in fig. 2, the device according to an embodiment of the present invention includes: ultra high input impedance interface circuitry, sigma-Delta ADC, digital bandpass filter, microprocessor (MCU), I2C interface circuitry, bandgap reference circuitry, high-speed oscillator OSC and low-speed oscillator OSC. After PIR signals are input, the PIR signals are processed and output through an ultrahigh input impedance interface circuit, a Sigma-Delta type ADC, a digital band-pass filter and a microprocessor in sequence, so that subsequent intelligent control operation is performed. Wherein:
the ultra-high input impedance interface circuit mainly realizes the coupling of the weak signal of the sensor and the device of the invention, and reduces the attenuation of the weak signal of the sensor as much as possible;
the Sigma-Delta ADC is used for analog-to-digital conversion, and converts analog signals of the sensor into digital signals so as to facilitate the processing of a later-stage circuit;
the digital band-pass filter is used for filtering signals and is used for filtering noise outside the effective signal bandwidth, so that the digital signals can accurately reflect the change of analog signals of the sensor;
the microprocessor is internally provided with data processing software, processes the output data of the digital band-pass filter, and realizes advanced filtering and function control in a software mode;
the I2C interface circuit realizes that the device in the embodiment of the invention is connected with other peripheral hosts for communication, thereby realizing intelligent processing and control;
the band gap reference circuit provides reference voltage and current for the Sigma-Delta type ADC, the high-speed oscillator and the low-speed oscillator;
the high-speed oscillator and the low-speed oscillator provide clocks for the Sigma-Delta ADC, digital bandpass filter, and microprocessor.
The device disclosed by the embodiment of the invention performs a series of transmission conversion and data processing on the sensor signal, and is connected with the peripheral equipment by combining the I2C interface, so that the device disclosed by the invention can realize real intelligent processing of the sensor signal, thereby realizing the core functions of applications such as the Internet of things and intelligent home.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 3 is a schematic diagram of a specific implementation of an intelligent PIR sensor signal processing device according to an embodiment of the present invention, where, as shown in fig. 3, the implementation device includes: the differential type ultra-high input impedance interface circuit, a 16-bit Sigma-Delta type ADC, a Butterworth filter, an 8-bit microprocessor, an I2C interface circuit, a band gap reference circuit, a high-speed oscillator, a low-speed oscillator, a power-on reset circuit POR and a power-off reset circuit BOR.
PIR sensor signals are connected with a differential type ultrahigh input impedance interface circuit through an IN+ end and an IN-end, and the differential type ultrahigh input impedance interface circuit is mainly used for realizing direct coupling transmission of weak signals of the sensor and the device, so that attenuation or reflection of the weak signals of the sensor are reduced as much as possible. The sensor signal is connected by the interface circuit to generate a signal AIN, and the signal AIN is directly sent to the ADC of the lower stage for processing.
The sensor analog signal AIN is converted into a digital signal DIN by adopting a high-performance 16-bit Sigma-Delta ADC to be directly coupled with a differential type ultrahigh input impedance interface circuit. Sigma-Delta ADC can high-frequency noise, and can identify very weak sensor signal after low-pass filtering, while signal DIN is a continuous string of binary codes that contains the effective signal and noise.
The digital band-pass filter adopts a Butterworth filter, the effective bandwidth is 0.4 Hz-7 Hz, noise outside the effective signal bandwidth can be filtered, and the digital signal can accurately reflect the change of the analog signal generated by the sensor. The binary code DIN is processed by a Butterworth filter to form a 16-bit digital signal BPF <15:0>.
The microprocessor processes the output signal BPF <15:0> of the Butterworth filter, and advanced filtering and function control are realized through built-in data processing software. The microprocessor adopts an 8-bit simplified instruction set MCU core, and comprises a ROM with 2K and a RAM memory space with 256 bytes.
The I2C interface circuit is used for being connected and communicated with other peripheral hosts to realize intelligent processing and control.
The signal processing device of the MCU type intelligent PIR sensor provided by the embodiment of the invention is provided with the built-in microprocessor, realizes real intelligent processing of signals in a software mode, reduces a large number of peripheral auxiliary devices of a system, simplifies an application circuit, improves the system stability, and further realizes control simplicity and microminiaturization of intelligent equipment.
It should be understood that the above embodiments are merely for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement the same according to the present invention without limiting the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (7)
1. An MCU type intelligent PIR sensor signal processing device is characterized in that:
the device comprises an ultra-high input impedance interface circuit, a Sigma-Delta type ADC, a digital band-pass filter, a microprocessor, an I2C interface circuit, a band-gap reference circuit, a high-speed oscillator and a low-speed oscillator;
the PIR sensor signal sequentially passes through an ultra-high input impedance interface circuit, a Sigma-Delta type ADC, a digital band-pass filter and a microprocessor for processing and outputting;
the band gap reference circuit and the high-speed oscillator and the low-speed oscillator are connected with the Sigma-Delta type ADC, the band gap reference circuit provides reference voltage and current for the Sigma-Delta type ADC, the high-speed oscillator and the low-speed oscillator, and the high-speed oscillator and the low-speed oscillator provide clocks for the Sigma-Delta type ADC, the digital band-pass filter and the microprocessor;
the microprocessor comprises data processing software which is used for processing the output data of the digital band-pass filter;
the I2C interface circuit is connected with the microprocessor and is used for being connected and communicated with a peripheral host to realize intelligent processing and control;
the processing of the output data of the digital band-pass filter comprises advanced filtering and function control;
the device also comprises a power-on reset circuit and a power-off reset circuit.
2. The MCU-type intelligent PIR sensor signal processing device of claim 1, wherein: the ultra-high input impedance interface circuit is a differential ultra-high input impedance interface circuit.
3. The MCU-type intelligent PIR sensor signal processing device of claim 1, wherein: the Sigma-Delta ADC is a 16-bit ADC.
4. The MCU-type intelligent PIR sensor signal processing device of claim 1, wherein: the digital band-pass filter is a butterworth filter.
5. The MCU-type intelligent PIR sensor signal processing device of claim 1, wherein: the microprocessor adopts an 8-bit simplified instruction set MCU core.
6. The MCU-type intelligent PIR sensor signal processing device of claim 4, wherein: the effective bandwidth of the digital band-pass filter is 0.4 Hz-7 Hz.
7. The MCU-type intelligent PIR sensor signal processing device of claim 5, wherein: the microprocessor contains 2K of ROM and 256 bytes of RAM memory.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106370313A CN106370313A (en) | 2017-02-01 |
| CN106370313B true CN106370313B (en) | 2023-09-08 |
Family
ID=57892407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611080531.1A Active CN106370313B (en) | 2016-11-30 | 2016-11-30 | MCU type intelligent PIR sensor signal processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106370313B (en) |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9209844B2 (en) * | 2012-01-11 | 2015-12-08 | Electronics And Telecommunications Research Institute | Subsampling receiver using interstage off-chip RF band pass filter |
-
2016
- 2016-11-30 CN CN201611080531.1A patent/CN106370313B/en active Active
Patent Citations (4)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106370313A (en) | 2017-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108549250A (en) | A kind of intelligent lighting curtain Controller for smart home | |
| CN103648004A (en) | Intelligent household television, intelligent household television system and intelligent household television system control method | |
| CN204832808U (en) | Intelligent household control system | |
| CN106370313B (en) | MCU type intelligent PIR sensor signal processing device | |
| CN103167340A (en) | Smart television gesture recognition system and method | |
| CN206208394U (en) | MCU type intelligent PI R sensor signal processing units | |
| CN103906368A (en) | Chip mounter placement head universal control system and control method thereof | |
| CN203872292U (en) | Wireless cloud monitor with infrared forwarding function | |
| CN203872284U (en) | Monitoring and power supply system special for prison | |
| CN204576717U (en) | The two mirror sniffer of a kind of infrared microwave | |
| US20140097945A1 (en) | Wireless Digital Signal-Controlled Switch System | |
| US20130162018A1 (en) | Adapter | |
| CN207095716U (en) | A kind of adjustable passive infrared detection equipment and there is its intelligent apparatus | |
| CN203705513U (en) | Hall sensor output signal processing circuit | |
| CN209297124U (en) | A kind of acoustic control detection device of perambulator | |
| CN203775326U (en) | Television having cameras and microphone | |
| CN203165132U (en) | Novel bank safety alarm with infrared monitoring and relay output control | |
| CN206695908U (en) | A kind of infrared induction module | |
| CN208240190U (en) | Based on the decoded rolling screen door wireless remote-controll ed receiving circuit of single-chip microcontroller | |
| CN107908117A (en) | A kind of brain wave control house system based on big data | |
| US8817006B2 (en) | Adapter | |
| CN203882440U (en) | Improved touch infrared remote controller | |
| CN204517991U (en) | A kind of set-top-box system with Intelligent housing and monitoring and warning function | |
| CN204303344U (en) | A kind of home theater equipment | |
| US8482666B1 (en) | Monitor device adapter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
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. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |