CN111246637A - Office mixed lighting control method and device - Google Patents
Office mixed lighting control method and device Download PDFInfo
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- CN111246637A CN111246637A CN202010054091.2A CN202010054091A CN111246637A CN 111246637 A CN111246637 A CN 111246637A CN 202010054091 A CN202010054091 A CN 202010054091A CN 111246637 A CN111246637 A CN 111246637A
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- 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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Abstract
The embodiment of the invention discloses a method and a device for controlling office mixed lighting, which are used for comparing and judging the intensity of lighting collected in a preset time period with a preset lighting threshold value, further controlling the opening angle of an indoor lamp or a shutter, realizing linkage control of shutter control equipment and indoor lighting regulation and control equipment, realizing intelligent mixed lighting mainly based on natural lighting and assisted by artificial lighting, and ensuring the intensity of lighting in an indoor office area to be within a certain range, thereby realizing the purposes of meeting the requirement of indoor lighting comfort and reducing the energy consumption of artificial lighting.
Description
Technical Field
The embodiment of the invention relates to the technical field of building indoor environment control, in particular to a method and a device for controlling office mixed lighting.
Background
The lighting power consumption accounts for 25% -40% of the energy consumption of the whole office building, and the natural lighting can save half of the lighting power consumption under specific conditions, thereby greatly saving energy. In addition, related researches also show that the working illumination level of natural lighting has important influence on the mental state of the human body. Under the condition of natural light, people can increase satisfaction and improve working efficiency. The requirement of indoor lighting comfort level is achieved by utilizing natural light, and the current indoor environment visual comfort level control is an important field. The sun-shading shutter arranged on the existing indoor window can adjust the indoor natural daylighting amount in a manual or electric lifting mode. However, such control of the products lacks intelligence, coupling type linkage can not be carried out with indoor artificial light sources, the requirement of people on indoor visual comfort can not be well met, and indoor artificial lighting energy consumption is easy to waste.
Disclosure of Invention
Therefore, the embodiment of the invention provides a method and a device for controlling office mixed lighting, so as to solve the problems that the requirement of people on indoor visual comfort cannot be well met and indoor artificial lighting energy consumption is easily wasted due to poor intelligence of the existing office lighting equipment in the prior art.
In order to fully utilize natural light to improve indoor visual comfort and reduce artificial lighting energy consumption, the invention provides a set of office mixed lighting control method and an implementation device which combine louver angle control based on a fuzzy control algorithm and light supplementary lighting regulation based on PID regulation by taking indoor illumination intensity as a control target. The specific technical scheme is as follows:
according to a first aspect of the embodiments of the present invention, there is provided an office hybrid lighting control method, including the steps of:
completely opening the blind curtain;
acquiring indoor illumination intensity at intervals of a preset first time period, and calculating the average value of the illumination intensity in a second time period; wherein the first time period is less than the second time period;
and judging the average value of the illumination intensity and a preset illumination threshold value, if the average value of the illumination intensity is smaller than the illumination threshold value, the angle of the shutter is not changed, and controlling an indoor lamp to be turned on.
Further, if the average value of the illumination intensity is greater than or equal to the illumination threshold, the indoor lighting amount is reduced.
Further, adjusting the brightness of the lamp; the lamp brightness adjustment adopts conventional PID control until the indoor illumination is at the illumination threshold.
Further, the reducing the amount of collected light in the room includes: and controlling the indoor lamp to be closed, and controlling the angle of the shutter by adopting a fuzzy control algorithm.
Further, the angle control of the blind includes a non-shielding angle, a 30-degree shielding angle, a 60-degree shielding angle, and an 85-degree shielding angle.
According to a second aspect of embodiments of the present invention, there is provided an office hybrid lighting control device, comprising a control module for controlling the blinds;
the calculation module is used for acquiring indoor illumination intensity in a preset first time period and calculating the average value of the illumination intensity in a second time period;
and the judging module is used for judging the average value of the illumination intensity and a preset illumination threshold value, if the average value of the illumination intensity is smaller than the illumination threshold value, the angle of the shutter is not changed, and the indoor lamp is controlled to be turned on.
Further, the judging module further comprises a lighting amount reducing module, which is used for judging that the average value of the illumination intensity is greater than or equal to the illumination threshold value, and reducing the indoor lighting amount.
Further, the system also comprises a PID control module which is used for controlling the brightness of the lamp by adopting the conventional PID until the indoor illumination is at the illumination threshold value.
Further, the light collection amount reducing module comprises a fuzzy algorithm control module for controlling the angle of the louver by adopting a fuzzy control algorithm.
Further, the angle control of the blind includes a non-shielding angle, a 30-degree shielding angle, a 60-degree shielding angle, and an 85-degree shielding angle.
The embodiment of the invention has the following advantages:
according to the office mixed lighting control method and device provided by the embodiment of the invention, the lighting intensity acquired in a preset time period is compared and judged with a preset lighting threshold value, so that the opening angle of an indoor lamp or a shutter is controlled, the linkage control of shutter control equipment and indoor lighting regulation and control equipment is realized, the intelligent mixed lighting with natural lighting as a main part and artificial lighting as an auxiliary part is realized, the lighting intensity of an indoor office area is ensured to be within a certain range, and the purposes of meeting the indoor lighting comfort requirement and reducing the energy consumption of the artificial lighting are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
Fig. 1 is a schematic flow chart of a method for controlling office mixed lighting according to embodiment 1 of the present invention;
fig. 2 is a schematic view illustrating an opening angle of a blind in an office hybrid lighting control method according to embodiment 1 of the present invention;
fig. 3 is a schematic view of a practical application scenario flow of the office hybrid lighting control method according to embodiment 1 of the present invention;
table 1 is a fuzzy set of natural lighting deviations;
table 2 shows a fuzzy set of natural lighting deviation change rates;
table 3 blind opening angle control change rate fuzzy set;
table 4 is a control rule table.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of an office hybrid lighting control method provided in embodiment 1 of the present invention includes the steps of:
completely opening the blind curtain;
acquiring indoor illumination intensity at intervals of a preset first time period, and calculating the average value of the illumination intensity in a second time period; wherein the first time period is less than the second time period;
and judging the average value of the illumination intensity and a preset illumination threshold value, if the average value of the illumination intensity is smaller than the illumination threshold value, the angle of the shutter is not changed, and controlling an indoor lamp to be turned on.
Natural lighting cannot meet the indoor lighting requirements. The angle of the blind curtain is not changed, an artificial lighting auxiliary mode is adopted, the indoor lamp is turned on, and light is supplemented for indoor lighting. Adjusting the brightness of the lamp; the lamp brightness adjustment adopts conventional PID control until the indoor illumination is at the illumination threshold.
The natural lighting can meet the indoor lighting requirement without adopting artificial lighting for assistance. In order to avoid glare caused by over-strong illumination, the opening angle of the louver needs to be controlled, and the light inlet quantity needs to be reduced.
In the embodiment of the invention, the indoor lamp is controlled to be closed, and the angle of the shutter is controlled by adopting a fuzzy control algorithm.
The shutter opening angle is adjusted by adopting a fuzzy control method, and the setting process of adjusting the shutter opening angle by fuzzy control is as follows:
(1) input and output variable determination
Deviation of natural lighting e (t +1)
The natural lighting deviation function e (t +1) is:
e(t+1)＝I(t+1)-Iset
in the formula, I (t +1) is the indoor average illumination intensity collected at the time of t + 1; i issetFor the indoor illuminance control target, the present invention is set to 400 lx.
Intensity of illuminationRate of change of degree deviation
Rate of change of deviation of illumination intensity
Is composed of
Where Δ t is the time interval between time t +1 and time t. To prevent the louver from being frequently adjusted due to the interval being too small, 10min is set here.
Referring to fig. 2, which is a schematic view of an opening angle situation of a louver in the office mixed lighting control method according to embodiment 1 of the present invention, a small angle of shading indicates that the louver is in a closed state, and a natural lighting amount is approximately 0; the non-shielding state is a completely opened state of the shutter, and the natural daylighting quantity is maximum; in other cases the natural daylighting amount is between a small angle shade and no shade. In the delta t time interval, the change condition of the opening angle of the louver is the change rate of the opening angle of the louver
When the opening angle of the louver is changed from small to large, the change rate of the opening angle of the louver is positive; otherwise, it is negative. The shutter opening angle regulation of the invention adopts a fuzzy control method, so a rate-of-change step dimming mode is adopted in the opening angle control, the rate of change of the shutter opening angle is set to 7 modes of-30, -15, -5, 0, +5, +15, +30 °/min, wherein the rate of change of 0 indicates that the shutter opening angle is not changed at the t +1 th moment.
(2) Variable fuzzification
Natural lighting deviation fuzzy set
Generally, when the illumination intensity is changed between-50 lx and +50lx, people do not feel the change of the indoor illumination intensity obviously, so that the change is small in negative and small in positive. To simplify the fuzzy set, the change in illumination when it is zero is normalized to a small change. The effect is considered obvious by most people when the change reaches more than 200, and the change is large negative and large positive. Others fall within the category of moderate variation. Therefore, the fuzzy set of natural lighting deviations is shown in Table 1:
TABLE 1
Fuzzy set of natural lighting deviation change rate
Empirically, a fuzzy set of natural lighting deviation rates can be established as follows:
TABLE 2
Rate of change of opening angle of louver
Fuzzy set
The fuzzy set of rate of change of control of the opening angle of the blinds is shown in table 3 below:
TABLE 3
(3) Fuzzy rule control table
Rate of change of opening angle of louver
Deviation e (t +1) from natural lighting and variation rate of illumination intensity deviation
Influence, so there are the following relationships:
formulating a fuzzy control rule for the rate of change of the louver opening angle may express this relationship as follows:
If e(t+1)＝Xiand
then
((1≤i≤6，1≤j≤6，i，j∈N*))
the rules may be written in the form of a control rule table as shown in table 4 below:
TABLE 4
It should be noted that the fuzzy sets of the above variables and the fuzzy control rule table of the louver opening angle change rate are all examples. When the fuzzy set and the fuzzy rule table are made, the parameter settings in the fuzzy set and the fuzzy rule table need to be further adjusted by using empirical analysis or simulation results according to actual conditions.
And outputting a control signal according to the lighting control mode selection condition and the equipment (lamp or shutter) setting condition in the corresponding mode.
At the next time, the above steps are repeated to continue the lighting control.
Fig. 3 is a schematic view of a practical application scenario flow of the office hybrid lighting control method according to embodiment 1 of the present invention.
Step 1 initialization settings
Suppose that at the t-th moment, the lighting control system starts to work, the shutter is in a fully opened state and is kept to the t +1t moment, and lighting equipment (shutters and lamps) are controlled at the t +1 moment. And at the time t and the time t +1, the indoor illumination intensity is collected. The sample collection time was one minute, and then the average over one minute was taken. It is assumed that the indoor average illumination intensities collected at times t and t +1 are I (t) and I (t +1), respectively.
Step 2, selecting lighting control mode
(1)I(t+1)＜400lx
Natural lighting cannot meet the indoor lighting requirements. The angle of the blind curtain is not changed, an artificial lighting auxiliary mode is adopted, the indoor lamp is turned on, and light is supplemented for indoor lighting.
(2)I(t+1)≥400lx
The natural lighting can meet the indoor lighting requirement without adopting artificial lighting for assistance. In order to avoid glare caused by over-strong illumination, the opening angle of the louver needs to be controlled, and the light inlet quantity needs to be reduced.
Step 3 lighting control
(1) Supplementary lighting mode
The angle of the blind curtain is not changed, and the brightness of the lamp is adjusted. The lamp brightness adjustment adopts conventional PID control until the indoor illuminance is 400 lx.
(2) Natural lighting pattern
And (5) completely closing the lamp, and adjusting the opening angle of the louver.
Step 4, controlling signal output
And outputting a control signal according to the lighting control mode selection condition and the equipment (lamp or shutter) setting condition in the corresponding mode.
And at the next moment, repeating the step 2-4 and continuing to perform lighting control.
According to a second aspect of embodiments of the present invention, there is provided an office hybrid lighting control device, comprising a control module for controlling the blinds;
the calculation module is used for acquiring indoor illumination intensity in a preset first time period and calculating the average value of the illumination intensity in a second time period;
and the judging module is used for judging the average value of the illumination intensity and a preset illumination threshold value, if the average value of the illumination intensity is smaller than the illumination threshold value, the angle of the shutter is not changed, and the indoor lamp is controlled to be turned on.
Further, the judging module further comprises a lighting amount reducing module, which is used for judging that the average value of the illumination intensity is greater than or equal to the illumination threshold value, and reducing the indoor lighting amount.
Further, the system also comprises a PID control module which is used for controlling the brightness of the lamp by adopting the conventional PID until the indoor illumination is at the illumination threshold value.
Further, the light collection amount reducing module comprises a fuzzy algorithm control module for controlling the angle of the louver by adopting a fuzzy control algorithm.
Further, the angle control of the blind includes a non-shielding angle, a 30-degree shielding angle, a 60-degree shielding angle, and an 85-degree shielding angle.
The embodiment of the invention has the following advantages:
according to the office mixed lighting control method and device provided by the embodiment of the invention, the lighting intensity acquired in a preset time period is compared and judged with a preset lighting threshold value, so that the opening angle of an indoor lamp or a shutter is controlled, the linkage control of shutter control equipment and indoor lighting regulation and control equipment is realized, the intelligent mixed lighting with natural lighting as a main part and artificial lighting as an auxiliary part is realized, the lighting intensity of an indoor office area is ensured to be within a certain range, and the purposes of meeting the indoor lighting comfort requirement and reducing the energy consumption of the artificial lighting are realized.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. An office hybrid lighting control method, comprising the steps of:
completely opening the blind curtain;
acquiring indoor illumination intensity at intervals of a preset first time period, and calculating the average value of the illumination intensity in a second time period; wherein the first time period is less than the second time period;
and judging the average value of the illumination intensity and a preset illumination threshold value, if the average value of the illumination intensity is smaller than the illumination threshold value, the angle of the shutter is not changed, and controlling an indoor lamp to be turned on.
2. The office hybrid lighting control method according to claim 1, wherein if the average value of the lighting intensities is greater than or equal to the lighting threshold, the lighting amount in a room is decreased.
3. The office hybrid lighting control method of claim 1, further comprising adjusting a luminaire brightness; the lamp brightness adjustment adopts conventional PID control until the indoor illumination is at the illumination threshold.
4. The office hybrid lighting control method according to claim 2, wherein said reducing an amount of lighting in a room comprises: and controlling the indoor lamp to be closed, and controlling the angle of the shutter by adopting a fuzzy control algorithm.
5. The method of claim 4, wherein the angular control of the louvers comprises an unobstructed angle, a 30 degree obstructed angle, a 60 degree obstructed angle, and an 85 degree obstructed angle.
6. The office mixed lighting control device is characterized by comprising a control module for controlling a shutter;
the calculation module is used for acquiring indoor illumination intensity in a preset first time period and calculating the average value of the illumination intensity in a second time period;
and the judging module is used for judging the average value of the illumination intensity and a preset illumination threshold value, if the average value of the illumination intensity is smaller than the illumination threshold value, the angle of the shutter is not changed, and the indoor lamp is controlled to be turned on.
7. The office hybrid lighting control device according to claim 6, wherein said judging module further comprises a lighting amount reduction module for reducing the lighting amount in the room if it is judged that the average value of the lighting intensities is greater than or equal to the lighting threshold value.
8. An office hybrid lighting control device according to claim 6 further comprising a PID control module for controlling the lamp brightness using conventional PID until the indoor light level is at the light threshold.
9. An office hybrid lighting control device according to claim 7 wherein the reduced lighting volume module includes a fuzzy algorithm control module for controlling the angle of said louvers using a fuzzy control algorithm.
10. An office hybrid light control device according to claim 7, wherein the angular control of the louvers comprises an unshielded angle, a 30 degree blocked angle, a 60 degree blocked angle and an 85 degree blocked angle.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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