CN104470058A - Partition illumination energy-saving switch control system and control method thereof - Google Patents

Partition illumination energy-saving switch control system and control method thereof Download PDF

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Publication number
CN104470058A
CN104470058A CN201410531419.XA CN201410531419A CN104470058A CN 104470058 A CN104470058 A CN 104470058A CN 201410531419 A CN201410531419 A CN 201410531419A CN 104470058 A CN104470058 A CN 104470058A
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microcontroller
illumination
image
camera
region
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CN104470058B (en
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沈勇
王丽
陈小龙
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Jiangsu Jin Bi Tian system integration Co., Ltd.
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Jiangsu University of Science and Technology
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Abstract

The invention discloses a partition illumination energy-saving switch control system and a control method of the system. The system is composed of at least one camera, at least one human body inductive sensor, a microcontroller, at least one relay, a plurality of lamps and a computer, wherein the camera is connected with the microcontroller through a USB interface, and the human body inductive sensor and the relay are connected with the microcontroller through a GPIO port; a brightness calculation program module, an image preprocessing program module and an image processing program module are embedded in the microcontroller; the microcontroller is connected with the computer through a USB interface or a serial port; the computer comprises a system parameter setting program module. The method is based on an image processing technology, a partition illumination mechanism is introduced so that partition illumination can be achieved, and the lamps in the areas where people exist or do not exist can be automatically turned on or off along with movement of people. According to the control system and the control method of the system, due to partition illumination and human body following illumination, huge waste of electric energy can be effectively avoided, and intelligent illumination is achieved.

Description

A kind of subregion lighting energy-saving switch control system and control method thereof
Technical field
The present invention relates to the technical field of power down switch, particularly a kind of subregion lighting energy-saving switch control system based on image procossing and control method thereof.
Background technology
In life, the use of electric light is very general, and bring very large convenience to people's life, but wasting phenomenon is very serious, especially in public places, people can not initiatively turn off the light usually.Often there will be both of these case: one is indoor no one, and lamp is light yellow but; Two is that larger space only has a small amount of people, and the whole light yellow of indoor electric lamps.Both of these case all can cause the significant wastage of electric energy.Therefore, the demand of more intelligentized power down switch becomes increasingly conspicuous.
At present, conventional power down switch has: light-operated switch, audio-switch, human body sensing (thermal infrared) switch.Light-operated switch is normally used for auxiliary audio-switch and human body sensing (thermal infrared) switch.
Audio-switch is widely used in the places such as corridor, but this control mode is in indoor, and as room for individual study, library etc. are comparatively quietly local and improper, and audio-switch is easily subject to the interference of other sound sources, as thunder, firecracker etc.As " a kind of control device of lighting switch " that number of patent application is 201110214279.X, whether there is people by sound detection, automatic cut-off switch when realizing nobody, thus reach energy-conservation effect.But the method is easily subject to the interference of noise, and in quiet situation, switch easily closes automatically, is not easy to use.
For human body sensing (thermal infrared) switch, as " a kind of energy-saving automatic lighting switch system " that number of patent application is 201110275818.0, by responding to the switch of the strength control lighting device of human body infrared and indoor light, realization have people to come into room and indoor light is crossed weak time, open lighting device, when personnel withdraw from a room or indoor light brightness is stronger, close electric supply installation.But human body induction module energy perception Studies of Human Body Heat is infrared, can not judge human motion direction, enter or withdraw from a room easily erroneous judgement; No matter and personnel are how many, whole room lighting is all opened, and causes the waste of electric energy.
To sum up, existing power down switch mainly has following problem: one is less stable, is subject to environmental interference; Two is to realize subregion illumination as required, even if one-man, also there will be the situation that whole room lighting is all opened; Three is intelligent lower, can not follow walking about of indoor occupant and throw light on.
Summary of the invention
The technical problem of object of the present invention and solution is the defect existed for prior art, for public place illumination, a kind of subregion lighting energy-saving switch control system and control method thereof are proposed, based on image processing techniques, and introduce subregion illumination mechanism, realization has people to enter place, and during indoor light deficiency, electric light is opened automatically; After electric light is opened, whether there is people by each field of illumination in the automatic sensing chamber of high-definition camera, realize subregion illumination (that is, open the electric light having people region, close the electric light of no man's land); Along with walking about of personnel, automatically turn on the electric light of human body region.Follow illumination by subregion illumination and human body, effectively can not only avoid the waste of electric energy, and realize intelligent lighting.
In order to realize above-mentioned object, technical scheme of the present invention is:
A kind of subregion lighting energy-saving switch control system, is made up of at least 1 camera 1, at least 1 human body sensor 2, microcontroller 3, at least 1 relay 4 and some electric lights and computer.Wherein said camera 1 is connected with microcontroller 3 by USB interface, and human body sensor 2, relay 4 are connected with microcontroller 3 by GPIO mouth; Brightness calculation program module, Image semantic classification program module, image processing program module is embedded with in described microcontroller 3; Microcontroller 3 is connected with computer by USB interface or serial ports; There is system parameter settings program module in described computer, carry out the setting of system parameters; In the ROM of system parameters stored in microcontroller 3.
Described camera 1 adopts CCD high-definition camera, for gathering off-the-air picture picture.
Described human body sensor 2 adopts RE200B infrared human body heat releasing electric transducer, is arranged near door, and for detecting, whether someone enters indoor.
Described microcontroller 3 uses the flush bonding processor of the ARM11 core containing USB interface, GPIO interface and serial ports.
Described relay 4 adopts electromagnetic relay G5V-1.
In order to realize above-mentioned object, another technical scheme of the present invention is:
The control method of a kind of subregion lighting energy-saving switch control system of the present invention, step is as follows:
1) when there being people to come into place, the arbitrary human body sensor in human body sensor 2 receives human infrared radiation, sends signal to microcontroller 3;
2) microcontroller 3 initialisation image buffering area, opens camera 1;
3) camera 1 gathers off-the-air picture picture, and sends images to microcontroller 3, according to each zonal basis image of field of illumination template sets;
4) the brightness calculation program module computed image brightness in microcontroller 3, when image brightness is lower than the luminance threshold of setting, then microcontroller 3 sends signal control relay 4 and turns on the electric light that human body closes on field of illumination, go to step 5), when image brightness is not less than the luminance threshold of setting, go to step 3);
5) camera 1 gathered off-the-air picture picture every 10 seconds, and sent images to microcontroller 3;
6) microcontroller 3 is by Image semantic classification program module, carries out gray processing and strengthen process to image; Each field of illumination present image and benchmark image, by image processing program module, contrast, calculate the frame difference of each field of illumination by microcontroller 3; When the frame difference limen value having region to be less than setting, and the image processed in the monitoring time preset all is less than frame difference limen value, then illustrate that this region is unmanned, go to step 8); When the frame difference limen value having region to be greater than setting, then illustrate that there is people in this region, this region present image is defined as its benchmark image, judge the on off state of this region relay 4, when this region electric light is opened, go to step 5), when this region electric light is not opened, go to step 7); Described monitoring time is 5 minutes;
7) microcontroller 3 sends signal, and the electric light in this region opened by the relay 4 controlling this region, goes to step 5);
8) microcontroller 3 sends signal, and the relay 4 controlling this region cuts out the electric light in this region; When all regions are all unmanned, then microcontroller 3 sends signal, closes camera 1, system hibernates, otherwise, go to step 5).
Step 3 described above) described field of illumination template divided field of illumination for the illumination zone of electric light controlled with each relay, and demarcated by field of illumination template.
Field of illumination scaling method, step is as follows:
1) camera 1 gathers off-the-air picture picture, and sends images to microcontroller 3;
2) image of each camera is sent to computer by microcontroller 3;
3) computer user is according to the actual illumination grouping situation of electric light, the boundary position of each field of illumination is demarcated by system parameter settings program, the frame difference limen value in this region is set, and each field of illumination boundary coordinate parameter and threshold parameter are sent to microcontroller 3;
4) each field of illumination boundary coordinate parameter and threshold parameter in the ROM stored in microcontroller 3, are formed field of illumination template by microcontroller 3.
Step 4 described above) described in the method for brightness calculation program module computed image brightness be: first picture is transformed into HSL space by rgb space, the brightness of L representation in components, twice mean computing is carried out to the L component of image, obtains the mean flow rate of an image.
Step 6 described above) in frame difference limen value, the size of each region frame difference limen value can be determined according to camera precision and installation site.After camera is fixing, using within the scope of camera head monitor can the contiguous pixels minimum value of frames differencing of perception human body minor motion as frame difference limen value.Frame difference limen value is set, also can the impact of rejection image noise and illumination variation.
Beneficial effect: a kind of subregion lighting energy-saving switch control system of the present invention and control method thereof, uses the method for image procossing detect the brightness of indoor, public place and whether have people, controls the opening and closing of electric light, thus reach energy-conservation effect.
Energy Saving Benefit Analysis: suppose that there are 5 building teaching buildings in a school, every building teaching building has 40 classrooms, and each classroom area is about 100m 2, lighting load is generally 1kW.If initiatively do not turned off the light after people walks, the electric energy of classroom waste in a hour is 1 degree, uses the present invention within 1 hour, can save electric energy 200 degree.And use subregion illumination, effectively avoid the waste of no man's land electric energy.If this system is generalized to other public places, energy-saving benefit is very considerable.
Feature of the present invention has:
1. subregion illumination is realized.The illumination zone of the lamp controlled according to each relay carries out Region dividing, and each region is corresponding with the relay in this region, realizes area illumination and the closedown of electric light, further saves energy.
2. realize following illumination to human body.Along with human body is walked about, human body region changes, if move towards non-field of illumination from field of illumination, non-field of illumination detects that there is people in this region, automatically turns on this region electric light.The field of illumination at the original place of human body detect this region nobody time, after the monitoring time of setting, automatically close the electric light in this region, improve the intelligent of Lighting control.
3. the present invention adopts image processing techniques to identify in field of illumination whether have people, and do not disturb by sound, infrared radiation, stability is strong.
4. carry out initialization system parameter by the parameter setting process of computer, convenient foundation actual environment or requirement are modified, and improve the flexibility of system.
5. embedded system technology is adopted, low in energy consumption, cost is low.As calculated, when only having a camera, the electric energy that this system consumes when normal work is only 1W, can ignore.
The present invention is applicable to the public place of large space, as public classroom, library etc.By setting up camera, the careat of system monitoring can be increased; By setting up human body sensor, the place imported and exported can be adapted to more.The present invention is equally applicable to the Energy Saving Control to other electrical equipment such as air-conditioning, electric fan.
Accompanying drawing explanation
Fig. 1 is the theory diagram of a kind of subregion lighting energy-saving switch of the present invention control system;
In figure: 1. camera, 2. human body sensor, 3. microcontroller, 4. relay.
Fig. 2 is the flow chart of a kind of subregion lighting energy-saving switch of the present invention control method;
Fig. 3 is the flow chart of a kind of field of illumination of the present invention scaling method.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, a kind of subregion lighting energy-saving switch control system, is made up of at least 1 camera 1, at least 1 human body sensor 2, microcontroller 3, at least 1 relay 4 and some electric lights and computer.Wherein said camera 1 is connected with microcontroller 3 by USB interface, and human body sensor 2, relay 4 are connected with microcontroller 3 by GPIO mouth; Brightness calculation program module, Image semantic classification program module, image processing program module is embedded with in described microcontroller 3; Microcontroller 3 is connected with computer by USB interface or serial ports; There is system parameter settings program module in described computer, carry out the setting of system parameters; In the ROM of system parameters stored in microcontroller 3.
Described camera 1 uses CCD camera, and definition is high, and containing 1 to multiple camera, for irregular or have the room of pillar, camera sight line is subject to block, and adopts multiple camera, can cover all blind areas.
Described human body sensor 2 adopts RE200B infrared human body heat releasing electric transducer, and sensitivity is strong, is arranged on each doorway place, detects whether someone enters.When whole system dormancy, pyroelectric infrared sensor is in running order, after pyroelectric infrared sensor detects that someone enters, just enters resting state; Until indoor unmanned, pyroelectric infrared sensor enters operating state again.
Described microcontroller 3 uses the flush bonding processor of ARM11 core, containing USB interface, GPIO interface and serial ports, and can each module of connected system.
Described relay 4 adopts electromagnetic relay G5V-1, for controlling the switch of electric light.
As shown in Figure 2, a kind of subregion lighting energy-saving switch control method, step is as follows:
1) when there being people to come into place, the arbitrary human body sensor in human body sensor 2 receives human infrared radiation, sends signal to microcontroller 3;
2) microcontroller 3 initialisation image buffering area, opens camera 1;
3) camera 1 gathers off-the-air picture picture, and sends images to microcontroller 3, according to each zonal basis image of field of illumination template sets;
4) the brightness calculation program module computed image brightness in microcontroller 3, when image brightness is lower than the luminance threshold of setting, then microcontroller 3 sends signal control relay 4 and turns on the electric light that human body closes on field of illumination, go to step 5), when image brightness is not less than the luminance threshold of setting, go to step 3);
5) camera 1 gathered off-the-air picture picture every 10 seconds, and sent images to microcontroller 3;
6) microcontroller 3 is by Image semantic classification program module, carries out gray processing and strengthen process to image; Each field of illumination present image and benchmark image, by image processing program module, contrast, calculate the frame difference of each field of illumination by microcontroller 3; When the frame difference limen value having region to be less than setting, and the image processed in the monitoring time preset all is less than frame difference limen value, then illustrate that this region is unmanned, go to step 8); When the frame difference limen value having region to be greater than setting, then illustrate that there is people in this region, this region present image is defined as its benchmark image, judge the on off state of this region relay 4, when this region electric light is opened, go to step 5), when this region electric light is not opened, go to step 7); Described monitoring time is 5 minutes;
7) microcontroller 3 sends signal, and the electric light in this region opened by the relay 4 controlling this region, goes to step 5);
8) microcontroller 3 sends signal, and the relay 4 controlling this region cuts out the electric light in this region; When all regions are all unmanned, then microcontroller 3 sends signal, closes camera 1, system hibernates, otherwise, go to step 5).
Step 3 described above) described field of illumination template divided field of illumination for the illumination zone of electric light controlled with each relay, and demarcated by field of illumination template.
As shown in Figure 3, a kind of field of illumination scaling method, step is as follows:
1) camera 1 gathers off-the-air picture picture, and sends images to microcontroller 3;
2) image of each camera is sent to computer by microcontroller 3;
3) computer user is according to the actual illumination grouping situation of electric light, the boundary position of each field of illumination is demarcated by system parameter settings program, the frame difference limen value in this region is set, and each field of illumination boundary coordinate parameter and threshold parameter are sent to microcontroller 3;
4) each field of illumination boundary coordinate parameter and threshold parameter in the ROM stored in microcontroller 3, are formed field of illumination template by microcontroller 3.
If there is nobody's but scene of changing of image always, as the position at the place such as clock and watch, fan, partial picture shielding can be set, avoid system to judge by accident.
Step 4 described above) described in the method for brightness calculation program module computed image brightness be: first picture is transformed into HSL space by rgb space, the brightness of L representation in components, twice mean computing is carried out to the L component of image, obtains the mean flow rate of an image.
Step 4 described above) in the defining method of luminance threshold be: after camera is fixing, takes the image under critical illumination condition, calculate the mean flow rate of this image, this average brightness value is set to luminance threshold.
Step 6 described above) in the computational methods of frame difference be: the pixel value of present image and the pixel value of benchmark image subtract each other one by one, and the vicissitudinous pixel of marked pixels, obtains frames differencing.
Step 6 described above) in frame difference limen value, the size of each region frame difference limen value can be determined according to camera precision and installation site.After camera is fixing, using within the scope of camera head monitor can the contiguous pixels minimum value of frames differencing of perception human body minor motion as frame difference limen value.Frame difference limen value is set, also can the impact of rejection image noise and illumination variation.
If after electric light is opened, As time goes on, indoor appearance is well-lighted situation without light, as from evening to daytime, can arrange clock control, close electric light.
Most public place is all provided with monitoring camera.The present invention can utilize existing monitoring camera, makes full use of existing resource.
Using method
For classroom, camera is arranged on indoor back upper place, human body sensor is arranged on two doorways of entering respectively.Classroom interior lighting device is divided into 4 regions, is respectively a-quadrant, B region, C region and D region.There are the opening and closing of the electric light in 4 these 4 regions of Control respectively.
Before use, computer is connected microcontroller, initialization system parameter.
1. personnel enter classroom, if insufficient light, electric light is opened automatically;
2. picture in camera timing acquiring classroom, realizes subregion illumination, opens illumination there being the region of people;
3. personnel move towards non-field of illumination from field of illumination, and the electric light of non-field of illumination is opened automatically along with the movement of human body;
4., when all personnel leaves classroom, close classroom intraoral illumination.
The present embodiment is more excellent execution mode of the present invention; it should be noted that; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change and are out of shape the protection range that all should belong to the claim appended by the present invention.

Claims (10)

1. a subregion lighting energy-saving switch control system, it is characterized in that, be made up of at least 1 camera (1), at least 1 human body sensor (2), microcontroller (3), at least 1 relay (4) and some electric lights and computer; Wherein said camera (1) is connected with microcontroller (3) by USB interface, and described human body sensor (2) is connected with microcontroller (3) by GPIO mouth with described relay (4); Brightness calculation program module, Image semantic classification program module and image processing program module is embedded with in described microcontroller (3); Microcontroller (3) is connected with computer by USB interface or serial ports; The system parameter settings program module of carrying out system parameter settings is included in described computer.
2. a kind of subregion lighting energy-saving switch control system according to claim 1, is characterized in that, described camera (1) adopts CCD high-definition camera, for gathering off-the-air picture picture.
3. a kind of subregion lighting energy-saving switch control system according to claim 1, it is characterized in that, described human body sensor (2) adopts RE200B infrared human body heat releasing electric transducer, is arranged near door, and for detecting, whether someone enters indoor.
4. a kind of subregion lighting energy-saving switch control system according to claim 1, is characterized in that, described microcontroller (3) is the flush bonding processor of the ARM11 core containing USB interface, GPIO interface and serial ports.
5. a kind of subregion lighting energy-saving switch control system according to claim 1, is characterized in that, described relay (4) is electromagnetic relay G5V-1.
6. a control method for subregion lighting energy-saving switch control system according to claim 1, is characterized in that, comprise the steps:
1) when there being people to come into place, arbitrary human body sensor (2) receives human infrared radiation, sends signal to microcontroller (3);
2) microcontroller (3) initialisation image buffering area, opens camera (1);
3) camera (1) gathers off-the-air picture picture, and sends images to microcontroller (3), according to each zonal basis image of field of illumination template sets;
4) the brightness calculation program module computed image brightness in microcontroller (3), when image brightness is lower than the luminance threshold of setting, then microcontroller (3) sends signal control relay (4) and turns on the electric light that human body closes on field of illumination, go to step 5), when image brightness is not less than the luminance threshold of setting, go to step 3);
5) camera (1) gathered off-the-air picture picture every 10 seconds, and sent images to microcontroller (3);
6) microcontroller (3) is by Image semantic classification program module, carries out gray processing and strengthen process to image; Each field of illumination present image and benchmark image, by image processing program module, contrast by microcontroller (3), calculate the frame difference of each field of illumination; When the frame difference limen value having region to be less than setting, and the image processed in the monitoring time preset all is less than frame difference limen value, then illustrate that this region is unmanned, go to step 8); When the frame difference limen value having region to be greater than setting, then illustrate that there is people in this region, this region present image is defined as its benchmark image, judge the on off state of this region relay (4), when this region electric light is opened, go to step 5), when this region electric light is not opened, go to step 7); Described monitoring time is 5 minutes;
7) microcontroller (3) sends signal, and the electric light in this region opened by the relay (4) controlling this region, goes to step 5);
8) microcontroller (3) sends signal, and the relay (4) controlling this region cuts out the electric light in this region; When all regions are all unmanned, then microcontroller (3) sends signal, closes camera (1), system hibernates, otherwise, go to step 5).
7. the control method of subregion lighting energy-saving switch control system according to claim 6, it is characterized in that, described step 3) described field of illumination template divided field of illumination for the illumination zone of electric light controlled with each relay, and demarcated by field of illumination template.
8. the control method of the subregion lighting energy-saving switch control system according to claim 6 or 7, is characterized in that, the scaling method of described field of illumination template, and step is as follows:
(A) camera (1) gathers off-the-air picture picture, and sends images to microcontroller (3);
(B) image of each camera is sent to computer by microcontroller (3);
(C) computer user is according to the actual illumination grouping situation of electric light, the boundary position of each field of illumination is demarcated by system parameter settings program, the frame difference limen value in this region is set, and each field of illumination boundary coordinate parameter and threshold parameter are sent to microcontroller (3);
(D) each field of illumination boundary coordinate parameter and threshold parameter in the ROM stored in microcontroller (3), are formed field of illumination template by microcontroller (3).
9. the control method of subregion lighting energy-saving switch control system according to claim 6, it is characterized in that, step 4) described in the method for brightness calculation program module computed image brightness be, first picture is transformed into HSL space by rgb space, the brightness of L representation in components, twice mean computing is carried out to the L component of image, obtains the mean flow rate of an image.
10. the control method of subregion lighting energy-saving switch control system according to claim 6, is characterized in that, step 6) described in the size of frame difference limen value determine according to camera precision and installation site; After camera is fixing, using within the scope of camera head monitor can the contiguous pixels minimum value of frames differencing of perception human body minor motion as frame difference limen value.Frame difference limen value is set, also can the impact of rejection image noise and illumination variation.
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