CN105259589B - A kind of infrared detection device and its control method for detecting human body - Google Patents
A kind of infrared detection device and its control method for detecting human body Download PDFInfo
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- CN105259589B CN105259589B CN201510798835.0A CN201510798835A CN105259589B CN 105259589 B CN105259589 B CN 105259589B CN 201510798835 A CN201510798835 A CN 201510798835A CN 105259589 B CN105259589 B CN 105259589B
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Abstract
The invention discloses a kind of infrared detection device for detecting human body, include the opaque outer cover of a lower ending opening, outer cover is arranged on above detection zone, fixed plate and perforated baffle are from top to bottom disposed with inside outer cover, perforated baffle is provided with a hole and the upper surface of perforated baffle and is provided with infraluminescence pipe, the lower surface of fixed plate is fixed with infrared detector, control circuit is additionally provided with fixed plate, controlling circuit includes microcontroller signal conditioning circuit and drive module, microcontroller is connected through drive module with controlled device, microcontroller is connected through signal conditioning circuit with infrared detector, microcontroller connects infraluminescence pipe.The invention also discloses the control method based on said apparatus.The present invention solves the problems of existing infrared detection static human body.
Description
Technical field
The invention belongs to automatic detection field, a kind of more particularly to infrared detection device.
Background technology
Infra-red radiation is very universal in nature, will be to week as long as its temperature of any object is higher than absolute zero
The environment space enclosed radiates the infrared ray of specific wavelength.Pyroelectric infrared sensor is mainly by a kind of detection of high Seebeck coefficient
Element is constituted, in temperature change, and certain change occurs for spontaneous polarization strength between its material pole plate, so that their two
End produces the bound charge of contrary sign and loads two detecting elements in each detector, and by two detecting elements with reversed polarity
The infra-red radiation for detecting and receiving, is transformed into faint voltage signal by detecting element, through the field in probe by series connection
Outwards exported after the amplification of effect pipe.
Pyroelectric infrared sensor can only carry out passive type work, it is impossible to detect stationary object, and signal amplitude is small.Mesh
Preceding the most frequently used pyroelectric infrared sensor is double base pyroelectric infrared sensor, and only temperature has change in the range of Sensor monitoring
During change, pyroelectric effect just can produce electric charge on two electrodes, a weak voltage be produced between electrodes, when environment temperature
When degree stablizes constant, sensor is without output, so static human body can not be detected.
At present, detect that the method for static human body is divided into two kinds substantially, first method is to utilize relative motion, makes sensing
Device produces relative motion with human body.It is divided into three kinds of methods again using relative motion, is to make pir sensor motion, make respectively
Fresnel Lenses motion, make what pir sensor was moved together with Fresnel Lenses.But all have ignored by means of which
When sensor is moved, the infrared light in environment also forms motion therewith, even if pyroelectric sensor remains unchanged in the case of nobody
Output can be produced, and is nearly all to carry out relative motion always during working sensor, device loss is big and has noise.
Second method is to utilize chopper principle, blocks sensor by a baffle plate, makes the infrared light in environment
Line is changed into the infrared input of pulsed.This amplification needs motor in rotation, not only brings the waste of great power consumption, and
The rotation of motor can produce certain electromagnetic interference, the not only presence of noise, it is also possible to certain noise is produced to system, is entered
And influence the function of system to realize.
The content of the invention
In order to solve the technical problem that above-mentioned background technology is proposed, the present invention is intended to provide a kind of infrared spy for detecting human body
Device and its control method are surveyed, the problems of existing infrared detection static human body is solved.
In order to realize above-mentioned technical purpose, the technical scheme is that：
A kind of infrared detection device for detecting human body, includes the opaque outer cover of a lower ending opening, and the outer cover is installed
Above detection zone, fixed plate and perforated baffle are from top to bottom disposed with inside outer cover, the perforated baffle is provided with one
Individual hole and the upper surface of perforated baffle are provided with infraluminescence pipe, and the lower surface of the fixed plate is fixed with infrared detector, fixed
Control circuit is additionally provided with plate, the control circuit includes microcontroller, signal conditioning circuit and drive module, the microcontroller
Device is connected through drive module with controlled device, and microcontroller is connected through signal conditioning circuit with infrared detector, and microcontroller connects
Connect infraluminescence pipe.
Wherein, the front of the infrared detector is provided with Fresnel Lenses.
Wherein, the signal conditioning circuit includes signal amplifier and analog-digital converter, the input of the signal amplifier
End connection infrared detector, the output end of signal amplifier connects the input of analog-digital converter, the output end of analog-digital converter
Connect microcontroller.
Wherein, the control circuit is printed on pcb board.
Wherein, the infrared detector is pyroelectric sensor.
Wherein, the infraluminescence pipe is connected through current-limiting resistance with microcontroller.
Wherein, the controlled device is the motor of warning device, electric light or automatically-controlled door.
Present invention additionally comprises the control method of the infrared detection device based on above-mentioned detection human body, comprise the following steps：
（1）By microcontroller preset infraluminescence pipe light with extinguish duration, judge someone output voltage
It is worth value range and time delay a；
（2）Microprocessor control infraluminescence pipe is lighted, into ignition period, when hot outer luminous tube lights, infrared spy
The signal intensity that survey device is received is big, and the output voltage of infrared detector is close to limiting value, and microcontroller detects and confirms this
During limiting value, do not produce control instruction, maintain current control state, when illuminated between at the expiration, microprocessor control infraluminescence
Pipe extinguishes, into the cycle of extinguishing；
（3）After infraluminescence pipe extinguishes, signal weaker, infrared sensor discharges the faint electric charge of itself, makes infrared sensing
The output voltage of device declines；
（4）Postpone after certain time a, microcontroller detects the output voltage of infrared sensor, when detecting infrared sensing
When the output voltage of device is located in the range of the output voltage values of default judgement someone, then detection zone someone, microcontroller are judged
Device performs corresponding operating during someone by drive module control controlled device；When the output voltage for detecting infrared sensor is low
In it is default judgement someone output voltage values scope when, then illustrate detection zone nobody, microcontroller passes through drive module control
Controlled device processed performs corresponding operation when nobody；
（5）Fall time expires, and microcontroller lights infraluminescence pipe again, and into ignition period, circulation performs step
（1）-（5）.
Wherein, the infraluminescence pipe is lighted and extinguishes duration and is set as 0.1-0.3 seconds.
Wherein, the time delay a is set as 30 milliseconds.
The beneficial effect brought using above-mentioned technical proposal：
（1）The present invention detects static and movement human using passive pyroelectric sensor, and by periodically lighting
With extinguishing infraluminescence pipe, and pass through certain delay, determine whether to reach the interval of action by voltage, it is possible to achieve to people
Free position（Motion and standstill）Detection；
（2）The present invention's is simple in construction, and the realization of system is easier, and compared to more motor-driven structure, is substantially reduced
The electromagnetic interference and power dissipation of itself, meet novel electronic product energy-saving standard.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention
Fig. 2 is the circuit composition frame chart of the present invention.
Label declaration：1st, outer cover；2nd, fixed plate；3rd, infraluminescence pipe；4th, perforate plate washer；5th, infrared detector.
Embodiment
Below with reference to accompanying drawing, technical scheme is described in detail.
The structural representation of the present invention as shown in Figure 1, a kind of infrared detection device of detection human body, including a lower end are opened
The opaque outer cover 1 of mouth, the outer cover is arranged on above detection zone, and fixed plate 2 is from top to bottom disposed with inside outer cover
With perforated baffle 4, the perforated baffle 4 is provided with a hole and the upper surface of perforated baffle 4 and is provided with infraluminescence pipe 3, described solid
The lower surface of fixed board, which is fixed with infrared detector 5, fixed plate 2, is additionally provided with control circuit, and the control circuit includes microcontroller
Device, signal conditioning circuit and drive module.As shown in Fig. 2 microcontroller is connected through drive module with controlled device, microcontroller
It is connected through analog-digital converter with infrared detector 5, microcontroller connection infraluminescence pipe 3.
In the present embodiment, the front of infrared detector is provided with Fresnel Lenses, can so be effectively increased detector
Detection range.Control circuit is printed on pcb board.Signal conditioning circuit includes signal amplifier and analog-digital converter, and signal is put
The input connection infrared detector of big device, the output end of signal amplifier connects the input of analog-digital converter, analog-to-digital conversion
The output end connection microcontroller of device, infrared detector receive signal is amplified, give microcontroller after analog-to-digital conversion process.
Infrared detector is pyroelectric sensor.Infraluminescence pipe is connected through current-limiting resistance with microcontroller.
Present invention additionally comprises the control method of the infrared detection device based on above-mentioned detection human body, comprise the following steps：
（1）By microcontroller preset infraluminescence pipe light with extinguish when a length of 0.2s, judge someone it is defeated
Go out range of voltage values value and time delay 30ms；
（2）Microprocessor control infraluminescence pipe is lighted, into ignition period, when hot outer luminous tube lights, infrared spy
The signal intensity that survey device is received is big, and the output voltage of infrared detector is close to limiting value, and microcontroller detects and confirms this
During limiting value, do not produce control instruction, maintain current control state, when illuminated between at the expiration, microprocessor control infraluminescence
Pipe extinguishes, into the cycle of extinguishing；
（3）After infraluminescence pipe extinguishes, signal weaker, infrared sensor discharges the faint electric charge of itself, makes infrared sensing
The output voltage of device declines；
（4）Postpone after 30ms, microcontroller detects the output voltage of infrared sensor, when detecting the defeated of infrared sensor
When going out voltage in the range of the output voltage values of default judgement someone, then detection zone someone is judged, microcontroller passes through
Drive module control controlled device performs corresponding operating during someone；Preset when the output voltage for detecting infrared sensor is less than
Judgement someone output voltage values scope when, then illustrate detection zone nobody, microcontroller is controlled controlled by drive module
Device performs corresponding operation when nobody；
（5）Fall time expires, and microcontroller lights infraluminescence pipe again, and into ignition period, circulation performs step
（1）-（5）.
In the present embodiment, controlled device can change according to the actual requirements, for example can be warning device, electric light or
It is the motor of automatically-controlled door, the automation mechanized operation such as when detecting someone in region, alarmed, turned on light or opened the door respectively.
The technological thought of above example only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within the scope of the present invention
Within.
Claims (8)
1. a kind of infrared detection device for detecting human body, it is characterised in that：Include the opaque outer cover of a lower ending opening, it is described
Outer cover is arranged on above detection zone, and fixed plate and perforated baffle, the perforate gear are from top to bottom disposed with inside outer cover
Plate is provided with a hole and the upper surface of perforated baffle and is provided with infraluminescence pipe, and the lower surface of the fixed plate is fixed with infrared acquisition
Control circuit is additionally provided with device, fixed plate, the control circuit includes microcontroller signal conditioning circuit and drive module, described
Microcontroller is connected through drive module with controlled device, and microcontroller is connected through signal conditioning circuit with infrared detector, micro-control
Device processed connects infraluminescence pipe；The front of the infrared detector is provided with Fresnel Lenses；The infrared detector is pyroelectricity
Sensor.
2. according to claim 1 it is a kind of detect human body infrared detection device, it is characterised in that：The signal conditioning circuit
Including signal amplifier and analog-digital converter, the input of the signal amplifier connects infrared detector, signal amplifier
Output end connects the input of analog-digital converter, the output end connection microcontroller of analog-digital converter.
3. according to claim 1 it is a kind of detect human body infrared detection device, it is characterised in that：The control circuit printing
On pcb board.
4. according to claim 1 it is a kind of detect human body infrared detection device, it is characterised in that：The infraluminescence Guan Jing
Current-limiting resistance is connected with microcontroller.
5. according to claim 1 it is a kind of detect human body infrared detection device, it is characterised in that：The controlled device is report
The motor of alarm device, electric light or automatically-controlled door.
6. the control method based on the infrared detection device that human body is detected described in claim 1, it is characterised in that including following step
Suddenly：
(1) by microcontroller preset infraluminescence pipe light with extinguish duration, judge someone output voltage values model
Enclose value and time delay a；
(2) microprocessor control infraluminescence pipe is lighted, into ignition period, when hot outer luminous tube lights, infrared detector
The signal intensity received is big, and the output voltage of infrared detector is close to limiting value, and microcontroller detects and confirms the limit
During value, do not produce control instruction, maintain current control state, when illuminated between at the expiration, microprocessor control infraluminescence pipe puts out
Go out, into the cycle of extinguishing；
(3) after infraluminescence pipe extinguishes, signal weaker, infrared sensor discharges the faint electric charge of itself, makes infrared sensor
Output voltage declines；
(4) after delay certain time a, microcontroller detects the output voltage of infrared sensor, when detecting infrared sensor
When output voltage is located in the range of the output voltage values of default judgement someone, then detection zone someone is judged, microcontroller leads to
Module of overdriving control controlled device performs corresponding operating during someone；When the output voltage for detecting infrared sensor is less than in advance
If judgement someone output voltage values scope when, then illustrate detection zone nobody, microcontroller by drive module control by
Control device performs corresponding operation when nobody；
(5) fall time expires, and microcontroller lights infraluminescence pipe again, into ignition period, circulation perform step (1)-
(5)。
7. the control method based on the infrared detection device that human body is detected described in claim 6, it is characterised in that：The infrared hair
Lighting and extinguishing duration for light pipe is set as 0.1-0.3 seconds.
8. the control method based on the infrared detection device that human body is detected described in claim 7, it is characterised in that：During the delay
Between a be set as 30 milliseconds.
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| CN201510798835.0A CN105259589B (en) | 2015-11-19 | 2015-11-19 | A kind of infrared detection device and its control method for detecting human body |
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| CN201510798835.0A CN105259589B (en) | 2015-11-19 | 2015-11-19 | A kind of infrared detection device and its control method for detecting human body |
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| CN105259589B true CN105259589B (en) | 2017-07-11 |
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| CN106932106A (en) * | 2017-03-29 | 2017-07-07 | 南京信息工程大学 | A kind of High-precision human infrared detection device and its detection method |
| CN107976720B (en) * | 2018-01-26 | 2024-01-05 | 泉州市科立信智能科技有限公司 | False alarm detection device and method for infrared detector |
| CN114333195A (en) * | 2021-11-23 | 2022-04-12 | 河北金锁安防工程股份有限公司 | Anti-theft alarm |
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| DE19548578C2 (en) * | 1995-12-27 | 2001-02-08 | Elbau Elektronik Bauelemente G | Position-selective passive infrared intrusion sensor |
| CN200989946Y (en) * | 2006-12-31 | 2007-12-12 | 怀化学院 | Passive type thermal infrared static human body target detector |
| US8339542B2 (en) * | 2009-06-26 | 2012-12-25 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled N-stack and collapsible backlights for sunlight viewable displays |
| CN103148946A (en) * | 2013-02-27 | 2013-06-12 | 慈溪思达电子科技有限公司 | Universal human body induction device |
| CN203164439U (en) * | 2013-03-22 | 2013-08-28 | 黄程云 | Digital passive infrared static human body detector |
| CN205120987U (en) * | 2015-11-19 | 2016-03-30 | 南京信息工程大学 | Detect human infrared detecting device |
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Address after: Room 420, block C, Kechuang headquarters building, 320 pubin Road, Jiangpu street, Pukou District, Nanjing City, Jiangsu Province, 211800 Patentee after: Nanjing University of Information Science and Technology Address before: 210000 69 Olympic Sports street, Jianye District, Nanjing, Jiangsu. Patentee before: Nanjing University of Information Science and Technology |
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Application publication date: 20160120 Assignee: Nanjing Yucheng Safety and Health Consulting Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023320000241 Denomination of invention: An infrared detection device for detecting the human body and its control method Granted publication date: 20170711 License type: Common License Record date: 20231121 |
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Application publication date: 20160120 Assignee: Fujian hefuyun Information Technology Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023980051730 Denomination of invention: An infrared detection device for detecting the human body and its control method Granted publication date: 20170711 License type: Common License Record date: 20231212 |
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Application publication date: 20160120 Assignee: Nanjing Xinqihang Software Technology Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023980051736 Denomination of invention: An infrared detection device for detecting the human body and its control method Granted publication date: 20170711 License type: Common License Record date: 20231213 Application publication date: 20160120 Assignee: Fujian Kailan Information Technology Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023980051725 Denomination of invention: An infrared detection device for detecting the human body and its control method Granted publication date: 20170711 License type: Common License Record date: 20231213 |
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Correction item: Assignee Correct: Nantong Yucheng Safety and Health Consulting Co., Ltd. False: Nanjing Yucheng Safety and Health Consulting Co., Ltd. Number: 49-02 Volume: 39 |
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Assignee: Nanjing Xinqihang Software Technology Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023980051736 Date of cancellation: 20240507 Assignee: Fujian hefuyun Information Technology Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023980051730 Date of cancellation: 20240507 Assignee: Fujian Kailan Information Technology Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023980051725 Date of cancellation: 20240507 |
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Assignee: Nantong Yucheng Safety and Health Consulting Co.,Ltd. Assignor: Nanjing University of Information Science and Technology Contract record no.: X2023320000241 Date of cancellation: 20240522 |