CN111246637A - A kind of office hybrid lighting control method and device - Google Patents

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

A kind of office hybrid lighting control method and device

technical field

Embodiments of the present invention relate to the technical field of building indoor environment control, and in particular, to a method and device for controlling hybrid lighting in an office.

Background technique

Lighting electricity accounts for 25%-40% of the energy consumption of the entire office building, and natural lighting can save half of the lighting electricity consumption under certain circumstances, which greatly saves energy. In addition, related research also shows that the working illuminance level of natural lighting has an important impact on the mental state of the human body. People in natural light conditions can increase satisfaction and improve work efficiency. The use of natural light to meet the requirements of indoor lighting comfort is an important area of visual comfort control in the current indoor environment. At present, the shading louvers set in the indoor windows can be manually or electrically raised and lowered to adjust the amount of indoor natural lighting. However, the control of such products lacks intelligence and cannot be coupled with indoor artificial light sources, that is, it cannot well meet people's requirements for indoor visual comfort, and it is easy to waste indoor artificial lighting energy consumption.

SUMMARY OF THE INVENTION

Therefore, the embodiments of the present invention provide a mixed lighting control method and device for an office, so as to solve the problem that people's requirements for indoor visual comfort cannot be well satisfied due to the poor intelligence of the current office lighting equipment in the prior art. It is also easy to cause waste of energy consumption of indoor artificial lighting.

In order to make full use of natural light to improve indoor visual comfort and reduce artificial lighting energy consumption, the present invention takes indoor light intensity as the control target, and proposes a combination of louver angle control based on fuzzy control algorithm and lighting supplementary light control based on PID adjustment. Office hybrid daylighting control method and realization device. Its specific technical solutions are as follows:

According to a first aspect of the embodiments of the present invention, a method for controlling hybrid lighting in an office is provided, comprising the steps of:

fully open the blinds;

collecting the light intensity in the room at a preset first time period, and calculating the average value of the light intensity in the second time period; wherein, the first time period is less than the second time period;

The average value of the illumination intensity and the preset illumination threshold value are judged, and if the average value of the illumination intensity is less than the illumination threshold value, the angle of the blinds does not change, and the indoor lamps are controlled to be turned on.

Further, if the average value of the light intensity is greater than or equal to the light threshold, the amount of indoor lighting is reduced.

Further, it also includes adjusting the brightness of the lamps; the brightness of the lamps is adjusted using conventional PID control, and the brightness of the lamps is adjusted until the indoor illuminance is at the illumination threshold.

Further, the reducing the amount of indoor lighting includes: controlling indoor lamps to be turned off, and using a fuzzy control algorithm to control the angle of the blinds.

Further, the angle control of the shutter includes no blocking angle, 30 degree blocking angle, 60 degree blocking angle and 85 degree blocking angle.

According to a second aspect of the embodiments of the present invention, there is provided an office hybrid daylighting control device, including a control module for controlling the blinds;

A calculation module for collecting the light intensity in the room at a preset first time period, and calculating the average value of the light intensity in the second time period;

A judgment module for judging the average value of the light intensity and a preset light threshold, and if the average value of the light intensity is less than the light threshold, the angle of the blinds does not change, and the indoor lamps are turned on.

Further, the judging module further includes a daylighting reduction module for judging that the average value of the illumination intensity is greater than or equal to the illumination threshold, and reducing the indoor daylighting volume.

Further, a PID control module is also included, which is used to control the brightness of the lamps by using conventional PID until the indoor illuminance reaches the illumination threshold.

Further, the daylight reduction module includes a fuzzy algorithm control module for controlling the angle of the blinds by using a fuzzy control algorithm.

Further, the angle control of the shutter includes no blocking angle, 30 degree blocking angle, 60 degree blocking angle and 85 degree blocking angle.

The embodiments of the present invention have the following advantages:

The embodiments of the present invention provide an office hybrid lighting control method and device, according to the comparison and judgment of the illumination intensity collected in a preset time period and a preset illumination threshold, and then control the opening angle of indoor lamps or blinds, Realize the linkage control of shutter control equipment and indoor lighting control equipment, realize intelligent mixed lighting with natural lighting as the main and artificial lighting as the supplement, and ensure that the light intensity of indoor office areas is within a certain range, so as to meet the requirements of indoor lighting comfort and The purpose of reducing the energy consumption of artificial lighting.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can also be obtained according to the extension of the drawings provided without creative efforts.

The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention, so there is no technical The substantive meaning, any modification of the structure, the change of the proportional relationship or the adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the technical content disclosed in the present invention. within the scope of coverage.

1 is a schematic flowchart of a method for controlling hybrid lighting in an office provided in Embodiment 1 of the present invention;

2 is a schematic diagram of the opening angle of the shutters of a hybrid lighting control method for an office provided in Embodiment 1 of the present invention;

3 is a schematic flowchart of a practical application scenario of an office hybrid lighting control method provided in Embodiment 1 of the present invention;

Table 1 is the fuzzy set of natural lighting deviation;

Table 2 is the fuzzy set of natural lighting deviation change rate;

Table 3. Fuzzy set of shutter opening angle control rate of change;

Table 4 is the control rule table.

Detailed ways

The embodiments of the present invention are described below by specific specific embodiments. Those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1 is a schematic flowchart of an office hybrid lighting control method provided in Embodiment 1 of the present invention, including steps:

fully open the blinds;

collecting the light intensity in the room at a preset first time period, and calculating the average value of the light intensity in the second time period; wherein, the first time period is less than the second time period;

The average value of the illumination intensity and the preset illumination threshold value are judged, and if the average value of the illumination intensity is less than the illumination threshold value, the angle of the blinds does not change, and the indoor lamps are controlled to be turned on.

Natural lighting cannot meet indoor lighting needs. The angle of the blinds does not change, the artificial lighting auxiliary mode is adopted, the indoor lamps are turned on, and the indoor lighting is supplemented. Adjust the brightness of the lamps; the brightness of the lamps is adjusted by conventional PID control, and the brightness of the lamps is adjusted until the indoor illumination is at the illumination threshold.

Natural lighting can meet the needs of indoor lighting without artificial lighting. In order to avoid glare caused by excessive light, it is necessary to control the opening angle of the louver to reduce the amount of light entering.

In the embodiment of the present invention, the indoor lamps are controlled to be turned off, and a fuzzy control algorithm is used to control the angle of the blinds.

The louver opening angle adjustment adopts the fuzzy control method. The setting process of the fuzzy control adjusting the louver opening angle is as follows:

(1) Input and output variables are determined

Natural Lighting Deviation 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 time t+1; Iset is the indoor illumination control target, which is _set to 400lx in the present invention.

Light intensity deviation rate of change

为Light intensity deviation rate of change

for

In the formula, Δt is the time interval between time t+1 and time t. In order to prevent frequent adjustment of louvers due to too small interval, here is set to 10min.

当百叶开启角度从小变大时，百叶开启角度变化率为正；反之为负。本发明的百叶开启角度调节采用模糊控制法，故在开启角度控制中采用变化率分阶调光方式，百叶开启角度变化率供设定为-30，-15，-5，0，+5，+15，+30°/min共7种模式，其中变化率为0表示在第t+1时刻百叶开启角度不发生变化。For the rate of change of the opening angle of the louver, see FIG. 2 for a schematic diagram of the opening angle of the louver of an office hybrid lighting control method provided in Embodiment 1 of the present invention. The small-angle occlusion means that the louver is in the closed state, and the amount of natural lighting is almost 0; When the shutters are fully opened, the amount of natural light is the largest; in other cases, the amount of natural light is between small-angle occlusion and no occlusion. During the Δt time interval, the change of the opening angle of the louver is the rate of change of the opening angle of the louver

When the opening angle of the louver increases from small to large, the rate of change of the opening angle of the louver is positive; otherwise, it is negative. The louver opening angle adjustment of the present invention adopts the fuzzy control method, so the change rate step-by-step dimming method is adopted in the opening angle control, and the louver opening angle change rate can be set to -30, -15, -5, 0, +5, +15, +30°/min, a total of 7 modes, where the change rate of 0 means that the opening angle of the shutter does not change at the t+1 time.

(2) Variable fuzzification

Natural Lighting Bias Blur Set

Generally, when the illuminance changes between -50 and +50lx, it is not obvious for people to feel the change of indoor illuminance, so it belongs to the small negative and positive changes. To simplify the fuzzy set, the change in illumination is classified as a positive small change when it is zero. When the change reaches more than 200, most people think that the impact is obvious, and the change is negative or positive. Others belong to the medium change category. Therefore, the fuzzy set of natural lighting deviation is shown in Table 1:

Table 1

Natural Lighting Bias Change Rate Fuzzy Set

According to experience, the fuzzy set of natural lighting deviation change rate can be established according to the following table 2:

Table 2

模糊集Blind opening angle change rate

fuzzy set

The fuzzy set of the shutter opening angle control rate of change is shown in Table 3 below:

table 3

(3) Fuzzy rule control table

受自然采光偏差e(t+1)及光照强度偏差变化率

影响，故有下关系：Shutter opening angle change rate

The natural lighting deviation e(t+1) and the change rate of the light intensity deviation

influence, so there is the following relationship:

To formulate a fuzzy control rule for the rate of change of the opening angle of the louver, the relationship can be expressed as the following form:

then

((1≤i≤6，1≤j≤6，i，j∈N^*))If e(t+1)=X _i and

then

((1≤i≤6, 1≤j≤6, i, j∈N ^* ))

The rule can be written in the form of the control rule table in Table 4 below:

Table 4

It should be noted that the fuzzy sets of the above variables and the fuzzy control rule table for the rate of change of the opening angle of the shutter are examples. When formulating fuzzy sets and fuzzy rule tables, it is necessary to further adjust the parameter settings in fuzzy sets and fuzzy rule tables by using empirical analysis or simulation results according to the actual situation.

According to the selection of lighting control mode and the setting of equipment (lamps or shutters) in the corresponding mode, output control signals.

At the next moment, the above steps are repeated to continue the lighting control.

Referring to FIG. 3 , it is a schematic flowchart of a practical application scenario of an office hybrid lighting control method provided in Embodiment 1 of the present invention.

Step 1 Initialize settings

Assuming that at time t, the lighting control system starts to work, the blinds are fully opened and remain until time t+1t, and the lighting equipment (blinds, lamps) are controlled at time t+1. At times t and t+1, the indoor light intensity is collected. The sample collection time was one minute, and then the one-minute average was taken. Assume that the average indoor light intensity collected at time t and t+1 is I(t) and I(t+1), respectively.

Step 2 Lighting control mode selection

(1)I(t+1)＜400lx

Natural lighting cannot meet indoor lighting needs. The angle of the blinds does not change, the artificial lighting auxiliary mode is adopted, the indoor lamps are turned on, and the indoor lighting is supplemented.

(2)I(t+1)≥400lx

Natural lighting can meet the needs of indoor lighting without artificial lighting. In order to avoid glare caused by excessive light, it is necessary to control the opening angle of the louver to reduce the amount of light entering.

Step 3 Lighting Control

(1) Auxiliary lighting fill light mode

The angle of the blinds does not change, and the brightness of the lamps is adjusted. The brightness of the lamps is adjusted by conventional PID control, and the brightness of the lamps is adjusted until the indoor illuminance is 400lx.

(2) Natural lighting mode

All lamps are turned off, and the opening angle of the shutters is adjusted.

Step 4. Control signal output

According to the selection of lighting control mode and the setting of equipment (lamps or shutters) in the corresponding mode, output control signals.

At the next moment, repeat steps 2-4 to continue lighting control.

According to a second aspect of the embodiments of the present invention, there is provided an office hybrid daylighting control device, including a control module for controlling the blinds;

A calculation module for collecting the light intensity in the room at a preset first time period, and calculating the average value of the light intensity in the second time period;

A judgment module for judging the average value of the light intensity and a preset light threshold, and if the average value of the light intensity is less than the light threshold, the angle of the blinds does not change, and the indoor lamps are turned on.

Further, the judging module further includes a daylighting reduction module for judging that the average value of the illumination intensity is greater than or equal to the illumination threshold, and reducing the indoor daylighting volume.

Further, a PID control module is also included, which is used to control the brightness of the lamps by using conventional PID until the indoor illuminance reaches the illumination threshold.

Further, the daylight reduction module includes a fuzzy algorithm control module for controlling the angle of the blinds by using a fuzzy control algorithm.

Further, the angle control of the shutter includes no blocking angle, 30 degree blocking angle, 60 degree blocking angle and 85 degree blocking angle.

The embodiments of the present invention have the following advantages:

The embodiments of the present invention provide an office hybrid lighting control method and device, according to the comparison and judgment of the illumination intensity collected in a preset time period and a preset illumination threshold, and then control the opening angle of indoor lamps or blinds, Realize the linkage control of shutter control equipment and indoor lighting control equipment, realize intelligent mixed lighting with natural lighting as the main and artificial lighting as the supplement, and ensure that the light intensity of indoor office areas is within a certain range, so as to meet the requirements of indoor lighting comfort and The purpose of reducing the energy consumption of artificial lighting.

Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present invention, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the claimed protection of the present invention.

Claims (10)

1. an office hybrid lighting control method, is characterized in that, comprises the steps: fully open the blinds; collecting the light intensity in the room at a preset first time period, and calculating the average value of the light intensity in the second time period; wherein, the first time period is less than the second time period; The average value of the illumination intensity and the preset illumination threshold value are judged, and if the average value of the illumination intensity is less than the illumination threshold value, the angle of the blinds does not change, and the indoor lamps are controlled to be turned on. 2 . The hybrid lighting control method for an office according to claim 1 , wherein if the average value of the light intensity is greater than or equal to the light threshold, the indoor lighting amount is reduced. 3 . 3 . The hybrid lighting control method for office according to claim 1 , further comprising adjusting the brightness of the lamps; conventional PID control is used to adjust the brightness of the lamps, and the brightness of the lamps is adjusted until the indoor illuminance is at the illumination threshold. 4 . 4 . The hybrid lighting control method for an office according to claim 2 , wherein the reducing the amount of indoor lighting comprises: controlling indoor lamps to be turned off, and using a fuzzy control algorithm to control the angle of the blinds. 5 . 5 . The method according to claim 4 , wherein the angle control of the blinds includes a non-blocking angle, a blocking angle of 30 degrees, a blocking angle of 60 degrees, and a blocking angle of 85 degrees. 6 . 6. An office hybrid lighting control device, characterized in that it comprises a control module for controlling blinds; A calculation module for collecting the light intensity in the room at a preset first time period, and calculating the average value of the light intensity in the second time period; A judgment module for judging the average value of the light intensity and a preset light threshold, and if the average value of the light intensity is less than the light threshold, the angle of the blinds does not change, and the indoor lamps are turned on. 7. The office hybrid lighting control device according to claim 6, wherein the judging module further comprises a daylighting reduction module for judging that the average value of the illumination intensity is greater than or equal to the illumination threshold, then Reduce indoor lighting. 8 . The office hybrid lighting control device according to claim 6 , further comprising a PID control module for controlling the brightness of the lamps by using conventional PID until the indoor illuminance reaches the illumination threshold. 9 . 9 . The hybrid lighting control device for an office according to claim 7 , wherein the daylight reduction module comprises a fuzzy algorithm control module, which is used to control the angle of the blinds by using a fuzzy control algorithm. 10 . 10 . The hybrid lighting control device for an office according to claim 7 , wherein the angle control of the shutters includes a non-blocking angle, a blocking angle of 30 degrees, a blocking angle of 60 degrees, and a blocking angle of 85 degrees. 11 .

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