JP5422519B2 - Representative illuminance dimming control system - Google Patents

Description

  The present invention relates to a representative illuminance dimming control system that automatically performs dimming output control of deterioration of illumination accompanying aging of a lighting fixture in a relatively large place such as an office office space or excessive lighting when a lighting fixture is replaced.

In general, the illuminance of a fluorescent lamp decreases with the lapse of lighting time due to a decrease in the amount of emitted light and a decrease in the efficiency of the lamp due to the dirt of the lamp. For this reason, in consideration of the average life of the fluorescent lamp, the illuminance is set to be considerably brighter than the design illuminance at the time of initial lighting so that the design illuminance can be maintained even at the end of the life.
Therefore, at the time of initial lighting, the illuminance of the fluorescent lamp is considerably brighter than the design illuminance, and extra brightness is generated, so that useless energy is consumed.

  In order to save energy, if the initial illuminance correction is performed by the lighting control device, the brightness of the fluorescent lamp is always kept at the design illuminance, and extra brightness occurs at the time of initial lighting as when the initial illuminance correction is not performed. Therefore, energy saving can be realized.

As a device equipped with such a lighting control device, there is known a lighting device that automatically adjusts the light control level with respect to the cumulative lighting time of the lighting device to keep the illuminance constant.
This lighting apparatus includes a lamp, an electronic ballast that turns on the lamp when input power is input, a dimming control unit that operates by the input power and outputs a dimming signal for dimming control of the ballast, It is comprised from the reset switch which outputs a reset signal to the light control part (patent document 1).

On the other hand, an illumination control system that adjusts light based on the output of an illuminance sensor is generally employed (Patent Document 2).
In this general lighting control system, the dimming section that is the range that one illuminance sensor is responsible for is the same as the range of the lighting section that is on / off or on / dimmed by a wall switch, human detection sensor, etc. Or it is set wider than the range.

Japanese Patent No. 4259140 JP-A-11-74087

  As shown in FIG. 7, the lighting fixture of Patent Document 1 is an integrated lighting unit with a control unit, and the control CPU of the control unit has a cumulative lighting with a usage time measurement timer set. When the time is measured, a dimming signal is generated and output to the dimming circuit, and the dimming circuit turns on the luminaire with a light amount corresponding to the dimming signal.

  The control unit, which is a dimming control unit of this lighting fixture, can automatically adjust the dimming level and keep the illuminance constant, but has a dimming control portion for each lighting fixture. Since the price of a single lighting fixture is high and it is necessary to install a large number of lighting fixtures when used as a lighting fixture in a relatively large place such as an office office space, it is not appropriate because it increases the initial cost. In addition, each lighting fixture is accompanied by operations such as setting a timer, which increases the construction cost.

In the illumination control system that performs dimming based on the output of the illuminance sensor of Patent Document 2, when the dimming section range is set to be the same as the lighting section range, as shown in FIG. The entire interior zone other than the perimeter zone affected by external disturbances is subject to illuminance control, and this illuminance control target is turned on / off or turned on / off by a wall switch, human detection sensor, etc. At the same time, the same section as the lighting area is a dimming control area indicated by a solid line.
An illuminance sensor is provided for each dimming control area.

  As shown in FIG. 9, this dimming control system includes an illuminance sensor and a control unit for each dimming control area, and each dimming control area is individually dimmed and controlled by this control unit.

  This dimming control system is controlled according to the flowchart shown in FIG. 10, and the control CPU executes an infinite loop as long as the current illuminance matches the set illuminance, and the current illuminance does not match the set illuminance. When it is determined, it is determined whether or not the current illuminance is lower than the set illuminance.If it is determined to be low, the dimming output is increased, and if it is determined to be high, the dimming output is decreased and the current illuminance is set again. Is returned to the step of determining whether or not it matches, and the above routine is repeatedly executed.

  Since this dimming control system performs dimming control independently for each lighting control area and for each lighting area as can be understood from FIG. 8, accurate dimming control can be achieved. Since it is necessary to install a control unit and an illuminance sensor for each light control area, the initial cost for constructing a dimming control system may be extremely high, and the number of maintenance target devices may increase and maintenance costs may increase. There is.

  In the illumination control system that performs dimming based on the output of the illuminance sensor of Patent Document 2, as shown in FIG. 11, the range of the dimming control area indicated by the solid line is set wider than the range of the lighting area indicated by the broken line. If any lighting area in the dimming control area, in particular, the lighting area where the illuminance sensor is installed (lower right area in FIG. 11 right side) is turned off, the detection value of the illuminance sensor Is strongly affected by the extinction of light, so that an event occurs in which the illuminance output of other lighting areas in the dimming control area becomes excessive (see the right side of FIG. 11), resulting in wasted energy.

In order to solve this problem, as shown in FIG. 12, for interior zones other than the perimeter zone affected by disturbances such as sunlight and lightning,
Dividing one overall illumination area having a large number of lighting fixtures into a plurality of dimming control areas, and selecting one or more representative dimming control areas from the plurality of dimming control areas;
While only one representative illuminance sensor is arranged in this representative dimming control area, a turn-off signal generator such as a human detection sensor is arranged in each lighting area in the representative dimming control area,
The control unit that controls the illuminance of all luminaires in the entire lighting area is not representative when no extinguishing signal is received from the extinguishing signal generator, in this example when all human detection sensors detect people. Judging that all the lighting fixtures in the light control area are in the lighting state,
At this time, the dimming output of the luminaires in the representative dimming control area is increased or decreased until the illuminance of the representative illuminance sensor arranged in the representative dimming control area matches the set illuminance, and the representative dimming control area when they match A representative illuminance dimming control system that outputs an internal dimming signal to all luminaires in the entire lighting area, and dims the illuminance of the luminaire to a set illuminance.
Can be considered.

With respect to the representative illuminance dimming control system shown in FIG. 13, the operation of the control CPU will be described with reference to FIG.
The control CPU determines whether or not all the lighting fixtures in the representative dimming control area are lit.
For example, in the case where the representative dimming control area is divided into four lighting areas as shown in the right diagram of FIG. 12, when the lower right lighting area is not lit, the representative illuminance in step 3 is equal to the set illuminance. Do not judge whether you are doing it.
That is, at this time, the infinite loop of Step 1 is executed and the process does not proceed to Step 3.
This is because when all the lighting fixtures in the representative dimming control area are not lit, the lighting fixtures are excessively illuminated as described above, and energy is wasted.
In addition, the signal that the lighting fixture is being lit uses an ON operation signal of a lighting switch or a human detection signal of a human detection sensor.

When determining that all the lighting fixtures in the representative dimming control area are lit, the control CPU determines whether or not the lighting time has elapsed for a predetermined time (step 2).
With this configuration, the illuminance at the time when the illuminance of each instrument is unstable is cut to obtain an appropriate measured value of illuminance.

After the lighting state of all the lighting fixtures in the representative dimming control area continues for a predetermined time, the illuminance of the representative dimming control area, that is, the average illuminance of the two representative illuminance sensors (hereinafter referred to as “representative illuminance”) is set. It is determined whether or not it matches the illuminance (step 3).
If the representative illuminance does not match the set illuminance, the process proceeds to step 4 to determine whether the representative illuminance is lower than the set illuminance.

  When the representative illuminance is lower than the set illuminance, the control CPU outputs a PWM signal slightly larger than the current PWM signal output from the dimming circuit in the representative dimming control area (step 5). When it is high, a so-called feedback method is executed in which a PWM signal that is slightly smaller than the current PWM signal output is output from the dimming circuit (step 6), and this operation is repeated until it matches the set illuminance.

  When the representative illuminance of the representative dimming control area matches the set illuminance, it corresponds to all the luminaires in the entire illumination area based on the representative illuminance obtained by averaging the illuminance signals from the respective representative illuminance sensors. A dimming signal is generated via the dimming circuit, and the generated dimming signal is output to each ballast of the corresponding luminaire, and the illuminance of the luminaire is unified to the set illuminance. Light control.

As described above, first, in the representative dimming control area, the dimming output value for matching the set illuminance is searched and determined by the feedback method, and the determined dimming output value is applied to all lighting fixtures to be controlled. It applies to.
When the dimming control for all the lighting fixtures is completed, the operation returns to step 2 and step 3 and the above operation is repeated continuously.

  When constructing a personal dimming control system, install a human detection sensor for each personal lighting area that is a section that blinks lighting equipment, and when the human detection sensor detects a person, the lighting of the lighting area The appliance is turned on, and when the human detection sensor no longer detects a person, the lighting fixture in the lighting area may be controlled to be turned off / off.

As described above, in this representative illuminance dimming control, by controlling the output values of several representative illuminance sensors, the dimming output of all luminaires in the illumination area of the entire floor excluding the perimeter zone is controlled. However, this representative illuminance dimming control system requires information that the luminaire is extinguished or dimmed, such as human detection information and wall switch status information, in order to generate the extinction signal. In addition, there is a possibility of additional costs for information communication with the wall switch and human detection sensors, which may increase costs, and it cannot be said that there is no room for further cost reduction.
Moreover, even if wiring that enables information communication with a wall switch or a human detection sensor is provided, it is difficult to prevent excessive lighting immediately after replacing the lighting fixture.

  The present invention was created in order to solve the various problems described above, and reduces the cost of a lighting fixture alone, simplifies the lighting fixture installation work, reduces the construction cost, and reduces the number of lighting areas. If one or more of these areas are turned off, the signal level of the illuminance sensor will be low, and the lighting fixture will be corrected to be higher than the appropriate value that should be corrected. A lighting control system that can accurately contribute to energy saving by suppressing the influence of sensing from the surrounding fluorescent equipment and suppressing the influence of sensing from the surrounding fluorescent equipment, and reducing the initial cost. It is intended to be provided to.

In the invention according to claim 1, one whole illumination area having a large number of lighting fixtures is divided into a plurality of dimming control areas, and at least one representative dimming control area is selected from the plurality of dimming control areas. Only in the selected representative dimming control area, one representative illuminance sensor that measures the illuminance of the surface to be illuminated by the illuminating device by the reflected light from the illuminated surface is arranged, and A control unit that performs dimming control of the luminaire compares the current illuminance of the representative illuminance sensor with the set illuminance, and increases the dimming output value for the representative dimming control area when the current illuminance is lower than the set illuminance. Correct the dimming output value for the representative dimming control area when the current illuminance is higher than the set illuminance, and adjust the dimming output value for the corrected representative dimming control area. , A representative illuminance dimming control system that outputs to all the luminaires in the entire illumination area, unifies the illuminance of the luminaire and controls the dimming to the set illuminance,
The control unit includes a correction permission counter that counts the number of times that the dimming output value for the representative dimming control area is corrected, and determines that the deviation width between the current illuminance and the set illuminance is within a predetermined range. The correction permission counter is incremented and the dimming output value for the representative dimming control area is increased or decreased. When the correction permission counter counts a predetermined dimming output value correction count, the representative at that time A dimming output value for the dimming control area, or an integrated dimming output value obtained by integrating the dimming output value and the current dimming output value for the entire lighting area, for all the lighting fixtures in the entire lighting area In contrast, a representative illuminance dimming control system for dimming output was adopted.

  The invention according to claim 2 is the representative illuminance dimming control system according to claim 1, wherein a plurality of the representative dimming control areas are selected, and the representative dimming control area is selected for each selected representative dimming control area. An illuminance sensor and the correction permission counter, and when the correction permission counter counts a predetermined number of times of dimming output value correction for each representative dimming control area, After the process of turning on the flag indicating that the corrected dimming output value has been saved is stored in the storage unit for each light control area, it is determined whether or not the flag is sequentially turned on for each representative dimming control area. When the flag is on, the integrated dimming is performed by integrating the dimming output value stored in the corresponding representative dimming control area storage unit and the current dimming output value for the entire illumination area. It is characterized by outputting for all luminaire entire illumination area output value.

  The invention according to claim 3 is the representative dimming control area corresponding to the current dimming output value for the entire illumination area when the flag for an arbitrary representative dimming control area is turned on. An average dimming output value obtained by weighted averaging the corrected dimming output value stored in the separate storage unit is dimmed and output to all lighting fixtures in the entire illumination area.

  In the invention according to claim 4, when the control unit of claim 2 initializes the temporary correction value and the flag for any representative dimming control area is on, the temporary correction value and the flag are on. It is characterized in that the maximum dimming output value among the respective corrected dimming output values in a certain representative dimming control area is dimmed and output to all the luminaires in the entire lighting area.

In the invention according to claim 5, one entire illumination area having a large number of lighting fixtures is divided into a plurality of dimming control areas, and at least one representative dimming control area is selected from the plurality of dimming control areas. Only in the selected representative dimming control area, one representative illuminance sensor that measures the illuminance of the surface to be illuminated by the illuminating device by the reflected light from the illuminated surface is arranged, and A control unit that performs dimming control of the luminaire compares the current illuminance of the representative illuminance sensor with the set illuminance, and increases the dimming output value for the representative dimming control area when the current illuminance is lower than the set illuminance. Correct the dimming output value for the representative dimming control area when the current illuminance is higher than the set illuminance, and adjust the dimming output value for the corrected representative dimming control area. And outputs for all luminaire entire lighting area, a representative illuminance dimming control system for controlling the dimming of the set illuminance unifying the illuminance of the luminaire,
When the current illuminance exceeds a predetermined deviation from the set illuminance and is higher than the set illuminance, the control unit determines that the luminaire is replaced and is in an excessively lit state, and adjusts the luminaire. The dimming output value for the representative dimming control area that has been reduced and corrected with the light lower limit as the limit is dimmed to all lighting fixtures in the entire lighting area, and the current illuminance has a predetermined deviation from the set illuminance. When it exceeds and is lower than the set illuminance, it is determined that the lighting fixture in any lighting area in the representative dimming control area is in the extinguished state, and the representative illuminance dimming control system does not execute the dimming control.

  The invention according to claim 6 is the control unit of the representative illuminance dimming control system according to any one of claims 1 to 5, wherein the current illuminance exceeds a predetermined deviation from the set illuminance, and A dimming permission counter that counts the number of times that it is determined that the illuminance is higher than the set illuminance, and when the dimming permission counter counts a predetermined number of times, it is determined that the lighting fixture has been replaced and is in an excessive lighting state, It is characterized in that the dimming output value is reduced and corrected with the dimming lower limit value of the fixture as the limit.

  In the invention according to claim 7, the representative illuminance dimming control system control unit according to any one of claims 1 to 5, wherein the current illuminance exceeds a predetermined deviation from the set illuminance, and A dimming output lower limit counter that counts higher than the set illuminance and that the current dimming output value corresponds to the dimming output lower limit of the lighting fixture, and the dimming output lower limit counter is a predetermined number of times. The dimming output value for the representative dimming control area at that time is dimmed and output to all the luminaires in the entire lighting area.

According to the first aspect of the present invention, since only one illuminance sensor is provided in the representative dimming control area, and a large number of lighting fixtures in a wide range can be appropriately dimmed, each dimming control area Since there is no need to install a control unit and illuminance sensor, the initial cost for building a dimming control system can be greatly reduced, reducing the number of maintenance target devices and reducing maintenance costs. Is possible.
Also, the current illuminance of the representative illuminance sensor is compared with the set illuminance.When the current illuminance is lower than the set illuminance, the dimming output value for the representative dimming control area is increased and corrected. As the dimming output value for the light control area is reduced, fine adjustment of the light control output value for the representative dimming control area is repeated a predetermined number of times to ensure proper dimming control within the representative dimming control area. be able to.

  Further, when the correction permission counter that counts the number of times of correcting the dimming output value for the representative dimming control area counts the predetermined dimming output value correction count, the dimming output value for the representative dimming control area at that time Alternatively, the dimming output value and the integrated dimming output value obtained by integrating the current dimming output value for the entire lighting area are dimmed and output to all the lighting fixtures in the entire lighting area. Dimming output is output to the entire lighting area after fine adjustment of the dimming rate, which is the dimming output value for the lighting fixtures in the dimming control area, a predetermined number of times. Thus, the excess or deficiency of illuminance can be adjusted with an appropriate period.

  According to the second aspect of the present invention, a plurality of representative illuminance sensors are provided, and dimming control is performed by integrating excess and deficiency of illuminance at a plurality of points. Therefore, the illuminance of the entire wide illumination area is averaged and dimmed. Therefore, the light control accuracy can be improved as compared with the first aspect of the invention.

  According to the invention according to claim 3, when the dimming rate of a certain representative dimming control area is corrected, the correction history of all the representative dimming control areas is determined as in the invention according to claim 4. Without waiting for the correction, the correction value is immediately reflected as a weighted average correction value, and can be immediately output to the lighting fixtures in the entire dimming control area for dimming control. Yes.

  According to the invention of claim 4, after judging the correction history of all the representative dimming control areas, the maximum correction value is output as the dimming rate of the luminaires in all the dimming control areas, thereby achieving the most dimming. Dimming control of lighting fixtures in all dimming control areas in accordance with the dimming rate of the representative dimming control areas with weak light output, making it possible to eliminate dimming areas and provide a comfortable lighting space Can be secured.

  According to the invention which concerns on Claim 5, when the said present illumination intensity exceeds the predetermined deviation width with the said setting illumination intensity, and is higher than the said setting illumination intensity, a lighting fixture is replaced | exchanged and it is in an overillumination state. And the dimming output value that is reduced and corrected with the dimming lower limit value of the lighting fixture as a limit is output to all the lighting fixtures in the entire lighting area, and the current illuminance has a predetermined deviation from the set illuminance. When it exceeds and is lower than the set illuminance, it is determined that the lighting fixture in any lighting area in the representative dimming control area is in the off state, and the dimming control is not executed. In addition to reducing the cost, wiring for information communication with the wall switch and a human detection sensor are not required, so that the installation work of the lighting fixture can be simplified and the construction cost can be reduced.

In addition, normally, when one or more of the plurality of lighting areas are turned off, the signal level of the illuminance sensor is low, and the lighting fixture is corrected to be higher than the appropriate value to be corrected. Although the illuminance is unnecessarily increased and power is consumed wastefully, according to the present invention, it is determined that the lighting fixture in any lighting area is in the extinguished state, and the dimming control is not executed. Can contribute greatly.
In addition, it is possible to prevent excessive lighting when replacing lighting fixtures, and to control the effects of sensing from surrounding fluorescent fixtures and perform accurate dimming control, which can contribute to energy saving clearly. The system can be provided at a low cost while suppressing the initial cost.

  In short, the representative illuminance dimming control system according to claim 5 determines that the current illuminance is not normal when the current illuminance is not within the appropriate deviation range from the set illuminance, and appropriately processes the current illuminance as described above. Since the dimming rate is gradually increased or decreased depending on the excess or deficiency of the illuminance when it is within the deviation range, representative dimming is performed without providing a human detection sensor in each lighting area and without wiring for communication. Software-like that at least one lighting area in the control area is extinguished or dimmed, and that many of the lighting fixtures in each dimming control area have been replaced to improve illuminance and are in an over-illuminated state Therefore, it is possible to construct an excellent system that has a function of determining whether or not energy is wasted.

  According to the invention according to claim 6, since the present invention includes the dimming permission counter that counts the number of times that the current illuminance exceeds the predetermined deviation from the set illuminance and is higher than the set illuminance, However, the dimming control value can be very accurately performed by reducing the dimming output value for the luminaire in the representative dimming control area only when the predetermined number of times has been reached.

  According to the invention of claim 7, the current illuminance exceeds a predetermined deviation from the set illuminance, is higher than the set illuminance, and the current dimming output value is the dimming output of the lighting fixture. Since it has a dimming output lower limit counter that counts when it corresponds to the lower limit value, the dimming rate lower limit counter has reached a predetermined value, that is, the lighting fixtures currently in use in the representative dimming control area. After confirming that the same conclusion that the original dimming rate lower limit was reached multiple times, output this dimming rate lower limit to the lighting fixtures in all dimming control areas, and Dimming control can be performed to the illuminance set by unifying the illuminance of the luminaire extremely accurately.

FIG. 1 is a schematic diagram of a representative illuminance dimming control system showing a representative dimming control area in the overall illumination area and a lighting area in the area. FIG. 2 is a schematic diagram of a representative illuminance dimming control system in which FIG. 1 is enlarged and the representative illuminance sensor of the present invention is specifically arranged. FIG. 3 is a configuration diagram of a representative illuminance dimming control system of the present invention. FIG. 4 is a flowchart relating to dimming output correction of the representative illuminance dimming control system according to the first embodiment of the present invention. FIG. 5 is a flowchart relating to dimming output correction of the representative illuminance dimming control system according to the second embodiment of the present invention. FIG. 6 is a flowchart according to integration of a plurality of correction values in a plurality of representative areas of the representative illuminance dimming control system according to the second embodiment of the present invention. FIG. 7 is a block diagram of the illumination control system of the first conventional invention (Patent Document 1). FIG. 8 is a schematic diagram (part 1) of a dimming control system in which one lighting area of the second conventional invention (Patent Document 2) is a dimming control area. FIG. 9 is a block diagram of the illumination control system of the conventional invention. FIG. 10 is a flowchart of the illumination control system of the conventional invention. FIG. 11 is a schematic diagram (part 2) of the dimming control system in which the four lighting areas of the second conventional invention (Patent Document 2) are the dimming control areas. FIG. 12 is a typical illuminance dimming control system schematic diagram in which a human detection sensor is provided in each lighting area and the four lighting areas are representative dimming control areas, which is an improvement of the second conventional invention. FIG. 13 is a configuration diagram of the representative illuminance dimming control system shown in FIG. FIG. 14 is a flowchart of the representative illuminance dimming control system shown in FIG.

2 and 3 with reference to the typical illuminance dimming control system schematic diagram showing the representative dimming control area in the entire illumination area and the lighting area in the area of FIG. Explain with assistance.
In the representative illuminance dimming control system of the present invention, the entire interior zone excluding the perimeter zone that is affected by disturbances such as sunlight and lightning is the dimming control target, and this dimming control target is turned on / off by a lighting switch or the like. In the present embodiment, a large number of dimming control areas indicated by solid lines for controlling the dimming control over the four lighting areas are defined.
Each dimming circuit that outputs PWM in the control unit of FIG. 3 controls dimming of all the lighting fixtures in the dimming control area.
And, at least one of the multiple dimming control areas, only one representative dimming control area in Example 1 described later, and each of a plurality of representative dimming control areas in Example 2 described later. The representative illuminance dimming control system is provided with one representative illuminance sensor.

The representative illuminance dimming control system of the present invention has a human detection sensor arranged for each lighting area as shown in FIG. 12 and FIG. Moreover, it does not include a communication unit that transmits lighting state output of the lighting fixture, for example, wall switch state information to the control unit.
With this configuration, not only the cost of parts such as the human detection sensor but also the wiring work for communication can be reduced and the installation cost of the system can be reduced. Further, the maintenance management cost of the communication wiring can be eliminated.

Furthermore, it is necessary for each dimming control area to ensure a range that is not affected by the illumination of the lighting fixtures arranged in other dimming control areas adjacent to each other even if it is narrow.
In this specification, “a range that is not affected by the illumination of a lighting fixture arranged in another adjacent dimming control area even if it is narrow” means that the illuminance sensor installed in the range is a lighting fixture in the adjacent range. In any case where is lit and extinguished, it is a range that is required to show the same illuminance measurement value in the range, and in a range that exceeds the detection range of the illuminance sensor, It means a range that varies depending on the arrangement height.
For example, as shown in FIG. 2, the average illuminance sensor capability at the present time is narrow when the lighting fixture is disposed at a standard ceiling height of 2.8 m. In both cases, it has been found that it is appropriate to set the range not affected by the illumination of the lighting fixture to a range of 7.2 m 2 or more.
Therefore, in the present invention, the range of the dimming control area is set to a range of at least 7.2 m square.

One or two representative illuminance sensors are provided for the entire illumination area, but three or four representative illuminance sensors may be provided.
As the number of representative illuminance sensors is increased, the accuracy of dimming control can be improved. However, it is necessary to consider in relation to the increase in the illuminance sensor equipment cost.
Moreover, it can also be set as the structure provided with one control unit with respect to one representative illumination intensity sensor. However, in this case, since the control unit and the representative illuminance sensor have a one-to-one correspondence, the dimming control is performed in comparison with the present embodiment in which the dimming control of the measured values of a plurality of representative illuminance sensors is performed by one control unit. The accuracy is slightly reduced, but there is no problem.

Furthermore, when the number of installed lighting fixtures exceeds the number of control units that can be controlled, a plurality of control units may be provided according to the control capability. In this case, it is preferable to provide a general control unit that controls each control unit.
Furthermore, in this embodiment, each dimming control area is divided into four lighting areas, but it is not always necessary to divide the lighting control areas into lighting areas.

As described above, each lighting area of the present invention is not provided with hardware for transmitting lighting / light-off information such as a human detection sensor to the control unit.
For this reason, in this representative illuminance dimming control system, at least one lighting area in the representative dimming control area is turned off or dimmed, and many of the lighting fixtures in each dimming control area are replaced. One of the features is that it has a function to determine by software that the illuminance is improved and the lighting is excessive.

FIG. 4 shows a flowchart for correcting the dimming output of the representative illuminance dimming control system of the first embodiment.
In the first embodiment, one of a large number of dimming control areas is set as a representative dimming control area, and a representative illuminance sensor is provided only in this area.
Hereinafter, each procedure of the flowchart will be described.

First, the illuminance of a lighting fixture required in a building to which the representative illuminance dimming control system of the present invention is applied is set in the illuminance storage unit of the control CPU of the control unit (step 1).
When the predetermined period has arrived (YES in step 2), the illuminance measurement value of the representative illuminance sensor arranged in the representative dimming control area, that is, the current illuminance, and the set illuminance set in the illuminance storage unit are compared. It is determined whether the deviation width is within a predetermined range, that is, whether the deviation width is within an appropriate deviation width (step 3).
Since this flowchart branches greatly depending on whether the determination result in step 3 is YES or NO, the left branch of NO will be described first.

The fact that the illuminance is not currently within the appropriate deviation range suggests that something that cannot normally occur is occurring.
And if the current illuminance is not within the appropriate deviation width and the current illuminance is lower than the set illuminance, it means that it is different from the normal brightness of the luminaire or the brightness decrease due to dirt. When the illuminance is higher than the set illuminance, it is understood that this cannot occur with normal dimming output increase.
Therefore, in the present invention, when the current illuminance is not within the appropriate deviation width and the current illuminance is lower than the set illuminance (step 6 YES), it is determined that the lighting fixture in the representative dimming control area is turned off. When the current illuminance is not within the appropriate divergence width and the current illuminance is higher than the set illuminance (NO in step 6), it is determined that many lighting fixtures in each dimming control area have been replaced and are in an over-illuminated state. Yes.
As long as the extinguishing state is continued, the infinite loop is continuously executed with step 3 and the dimming control is not involved.
With this configuration, even if the range of the representative dimming control area is set wider than the range of the lighting area as in this embodiment, any lighting area in the representative dimming control area is turned off. If so, the occurrence of an event that causes excessive illumination output in other lighting areas in the representative dimming control area is prevented without executing dimming control, and waste of energy is suppressed.

On the other hand, when it is determined that the current illuminance is not within the appropriate divergence range, the current illuminance is higher than the set illuminance, and many lighting fixtures in each dimming control area have been replaced and are in an excessively lit state, it is actively adjusted. We are going to control the light.
The control CPU includes a dimming permission counter that counts the number of times that the current illuminance exceeds a predetermined deviation from the set illuminance and is higher than the set illuminance, and the current dimming output value is determined by the luminaire. A dimming output lower limit counter that counts corresponding to the dimming output lower limit;
If NO is determined in step 6, the dimming permission counter is counted up (step 8), and an infinite loop is executed with step 3 until the count reaches a predetermined value in step 10 as long as the excessive illumination state continues. When the count reaches the predetermined value (YES in step 10), the dimming output value for the lighting device in the representative dimming control area is decreased according to the calculation result of the control CPU, the table reference result, and the like (step 12).
As described above, it is not until the number of times that the current illuminance exceeds the predetermined deviation from the set illuminance and is higher than the set illuminance reaches the predetermined number of times. The light output value is decreased, and the light control is accurately performed to substantially prevent the occurrence of light reduction due to a determination error.
In this embodiment, since the dimming output value is defined by the dimming rate that is the ratio of the luminous flux output from the lamp of the lighting fixture, the dimming rate is actually decreased by several percent.
And the dimming rate immediately before exchanging the lighting fixture is about 100%, and the dimming rate immediately after exchanging the fixture is often required to be a lower limit value.
For this reason, when the dimming output is decreased, it is determined whether or not the dimming rate is the lower limit value of the lighting fixture (step 14).

  When the dimming rate of the lighting fixture has not reached the lower limit value (NO in step 14), the dimming output lower limit value counter, that is, the dimming rate lower limit counter is reset (step 16), the process returns to step 3, and again. It is determined whether the current illuminance is within the appropriate deviation range, and the brightness is not adjusted within the proper deviation range. Light control.

In this embodiment, the dimming rate lower limit counter is counted up in order to accurately determine that the dimming rate of the appliance has reached the lower limit so as not to cause insufficient illumination. When the dimming rate lower limit counter does not count the predetermined number, the process returns to step 2 and waits for the next cycle.
The same conclusion that the dimming rate lower limit counter has reached a predetermined value by repeating this process for several cycles, that is, the dimming rate lower limit value of the luminaire specifications currently in use in the representative dimming control area. Is confirmed multiple times (step 20 YES), the dimming rate lower limit counter is reset (step 21), and dimming output values to be output to all lighting fixtures in the entire lighting area are stored. The dimming rate, which is a new dimming output value, is stored in the dimming output storage unit, and this dimming rate lower limit value is output to the lighting fixtures in the entire dimming control area (step 22). Dimming control is performed to the illuminance set by unifying the illuminance of the lighting fixtures.

As a result of reducing the dimming rate in step 12, it may be determined in step 3 that the deviation width between the current illuminance and the set illuminance is within a predetermined range.
At this time, a dimming rate correction process, which will be described later, is executed.

Next, a processing procedure when it is determined in step 3 that the current illuminance is within the appropriate deviation width will be described.
The important point of this right branching process is that in Step 18.19, fine adjustment of the dimming rate, which is the dimming output value for the luminaire in the representative dimming control area, is executed a predetermined number of times. Thus, the dimming rate, which is the dimming output value stored in the dimming output storage unit of the control CPU, is corrected.
Hereinafter, this point will be described in detail.

The control CPU further includes a correction permission counter that counts the number of times that the dimming output value for the representative dimming control area is corrected.
When it is determined in step 3 that the current illuminance is within the appropriate deviation range, the correction permission counter is counted up (step 5).
When the count number of the correction permission counter does not reach the predetermined number (step 7 NO), it is determined whether or not the current illuminance is lower than the set illuminance. When it is determined that the current illuminance is low (step 15 YES), the representative dimming control area The dimming rate, which is the dimming output value for the luminaire, is increased, and when it is determined to be high (NO in step 15), the tuning light rate is decreased.
Such fine adjustment of the dimming output value for the representative dimming control area is repeated a predetermined number of times to ensure the appropriateness of dimming control in the representative dimming control area.

After executing the above processing procedure, it is confirmed in step 7 that the correction permission counter has counted a predetermined number (step 7 YES), and in step 9 the previous correction stored in the dimming output storage unit of the control CPU. A dimming output value obtained by finely adjusting the dimming rate, which is the dimming output value, with respect to the current representative dimming control area is rewritten as the current correction value.
Then, the rewritten corrected dimming rate is output to the total dimming control area, and dimming control is performed on all the luminaires.
It is also possible to output the correction value this time directly to the dimming circuit in each dimming control area without saving it in the dimming output storage unit.
Next, the correction permission counter is reset (step 13).

Furthermore, the dimming control is performed by increasing / decreasing the dimming output value only in the representative dimming control area according to whether or not the current illuminance is lower than the set illuminance (step 18.19), and then the infinite loop of step 2 is performed. Wait until the next cycle while executing.
When the next cycle arrives, the above processing is repeated.

In this embodiment, when the dimming rate is rewritten in step 9, the previously adjusted dimming rate and the dimming rate in the current representative dimming control area are weighted and averaged.
As an example of the weighted average process, in order to weight the light control rate corrected last time, this is multiplied by 3 and the light control rate in the current representative light control area is added to divide into 4 equal parts.
This weighted average process respects the past dimming output values for the luminaires in the entire dimming control area and prevents sudden changes in the dimming output.

In this way, the representative illuminance dimming control system of the present invention determines that the current illuminance is not normal when the current illuminance is not within the appropriate deviation from the set illuminance, and appropriately processes as described above. Since the dimming rate is gradually increased / decreased according to the excess or deficiency of illuminance when it is within the appropriate deviation range, it is possible to adjust all the lighting without installing human detection sensors in each lighting area and without wiring for communication. The dimming control is performed to the illuminance set by unifying the illuminance of the lighting fixtures in the light control area.
In particular, the function of automatically determining that the luminaire has been replaced is notable in the prior art.

In the present embodiment, at least two representative dimming control areas are selected, and a representative illuminance sensor is installed in each of the selected areas, which corresponds to the inventions according to claims 2 to 4.
FIG. 5 is a flowchart for obtaining a corrected dimming output value of the representative illuminance dimming control system of this embodiment, that is, a correction value for correcting the dimming output, and FIG. 5 shows respective corrections for the plurality of representative dimming control areas. A flow chart for integrating values is shown in FIG.

A detailed description will be given below with reference to FIGS.
The flowchart shown in FIG. 5 is basically the same as that shown in FIG. 4 in that a correction value for correcting the dimming output is obtained based on the current illuminance and the set illuminance in the representative dimming control area.
However, what is shown in FIG. 5 is different from that shown in FIG. 4 in that a plurality of correction values need to be processed for a plurality of representative dimming control areas.
The different processing procedures are steps 22 and 23 in the left branch and steps 9 and 11 in the right branch.
Specifically, a process of storing the correction value for each representative dimming control area (step 22.9) and a process for notifying that a specific representative dimming control area has a correction value ( Step 23.11).
Therefore, in this processing flow, a correction processing flag n (n = 1.2) indicating whether or not there is a correction of the dimming rate for a specific representative dimming control area n (n = 1.2.3....). ... 3) (step 23.11), and the processing is not immediately output to the lighting fixtures in the entire dimming control area as in the first embodiment.

As described above, this embodiment includes a plurality of representative illuminance sensors.
Therefore, the processing flow shown in FIG. 5 is executed independently for each representative illuminance sensor.
Actually, this processing flow is executed for each representative illuminance sensor by an appropriate method such as a parallel processing method, a sequential processing method, or a time sharing method.
As a result, since a plurality of correction values of the dimming rate are acquired for each representative illuminance sensor, the plurality of correction values are separately integrated into one correction value, and all dimming control is performed based on the integrated correction value. Although it is necessary to control the dimming by unifying the lighting fixtures in the area, this processing process will be described later.

By executing the flowchart of FIG. 5, information on whether or not correction processing has been performed for the dimming rate of the plurality of representative dimming control areas is obtained as the ON / OFF signal of the correction processing flag.
Therefore, the multiple correction value integration processing flow of FIG. 6 will be described.

When the predetermined period has arrived (step 24), n = 0 and an appropriate numerical value is stored in the temporary correction value storage unit of the control CPU to initialize the temporary correction value (step 25).
Next, the value of n is incremented by 1 (step 26), and the representative dimming control area n = 1
It is determined whether or not the correction processing flag is ON (step 27). If NO, the process jumps to step 33, and when the value of n is not MAX (NO in step 33), n is incremented by one step again in step 26 and plural It is determined whether the correction processing flag of the next area among the representative dimming control areas is ON.
Details of processing when the correction processing flag is ON will be described later.
The above processing is repeatedly executed until the value of n reaches MAX, and the processing is terminated.

  When the correction processing flag of the area is ON, that is, when there is a history of correcting the dimming rate of the area in the flowchart of FIG. 5, either the high correction value priority method or the weighted average method is averaged at the present time. It is determined whether the method is selected (step 28).

When the high correction value priority method is selected, the correction value of the area is compared with the temporary correction value initialized in step 25, and the larger value is rewritten to the temporary correction value storage unit as the temporary correction value. Then, the correction processing flag for the area is turned OFF.
As a result of repeating the above processing until the value of n reaches MAX, the maximum correction value among the plurality of representative dimming control areas is stored as a temporary correction value (step 29).
In the high correction value priority method, the maximum correction value is output as the dimming rate of the luminaires in the entire dimming control area (step 34).
Thus, the lighting fixtures in all the dimming control areas are dimmed in accordance with the dimming rate of the representative dimming control area having the weakest dimming output, and there is no area where the dimming is insufficient.

On the other hand, when the weighted average method is selected, the correction value stored in the storage unit and the weighted average value of the correction value of the representative dimming control area currently being processed are rewritten to the storage unit (step 30). .
Then, this weighted average value is output as the dimming rate of the luminaires in the entire dimming control area (step 31), and the correction processing flag for the area is turned off (step 32).
According to this weighted average method, when the dimming rate of a certain representative dimming control area is corrected, the correction histories of all the representative dimming control areas are determined as in the high correction value priority method described above. Without waiting for this, the correction value is immediately reflected as a weighted average correction value, and is immediately output to the lighting fixtures in the entire dimming control area for dimming control.
Then, if the light control rate of a specific representative light control area is corrected next, similar light control is repeated.
In this respect, after the above-described high correction value priority method determines whether or not all the representative dimming control areas are corrected, the correction value is output as the dimming rate of the luminaires in all dimming control areas. Is different.

  According to the first embodiment, the current illuminance of only one of a large number of dimming control areas and the selected representative dimming control areas according to the second embodiment are outside the predetermined deviation width from the set illuminance. In some cases, it is determined that the lighting fixture has been replaced and is in an excessive lighting state, or that one of the lighting areas in the representative dimming control area is turned off. The light control rate is reduced to the lower limit of the light, and if it is the latter, the light control is not executed, and the ultimate energy saving is achieved while reducing the number of illuminance sensors installed and omitting human detection sensors and communication wiring. doing.

Claims (7)

One overall lighting area having a large number of lighting fixtures is divided into a plurality of dimming control areas, and at least one representative dimming control area is selected from the plurality of dimming control areas,
Only in this selected representative dimming control area, one representative illuminance sensor that measures the illuminance of the illuminated surface by the luminaire by the reflected light from the illuminated surface is arranged,
A control unit for dimming control of all lighting fixtures in the overall lighting area,
The current illuminance of the representative illuminance sensor is compared with the set illuminance, and when the current illuminance is lower than the set illuminance, the dimming output value for the representative dimming control area is increased and corrected, and the current illuminance is greater than the set illuminance. When it is high, the dimming output value for the representative dimming control area is decrementally corrected, and the dimming output value for the corrected representative dimming control area is output to all the lighting fixtures in the entire lighting area. A representative illuminance dimming control system that controls the dimming to the set illuminance by unifying the illuminance of
The control unit is
A correction permission counter that counts the number of times that the dimming output value for the representative dimming control area is corrected,
When it is determined that the deviation width between the current illuminance and the set illuminance is within a predetermined range, the correction permission counter is counted up, and the dimming output value for the representative dimming control area is increased or decreased,
When the correction permission counter counts a predetermined dimming output value correction count, the dimming output value for the representative dimming control area at that time, or the dimming output value and the current dimming for the entire illumination area A representative illuminance dimming control system for dimming and outputting an integrated dimming output value obtained by integrating the output value to all lighting fixtures in the entire illumination area. A representative illuminance dimming control system according to claim 1,
A plurality of the representative dimming control areas are selected,
For each selected representative dimming control area, the representative illuminance sensor and the correction permission counter,
When the correction permission counter counts a predetermined dimming output value correction count for each representative dimming control area, the correction dimming output value at that time is stored in the corresponding representative dimming control area storage unit. After completing the process of turning on the flag indicating that the corrected dimming output value has been saved,
For each representative dimming control area, it is sequentially determined whether the flag is on. When the flag is on, the dimming output value and the entire illumination area stored in the corresponding representative dimming control area storage unit A representative illuminance dimming control system that outputs an integrated dimming output value that is integrated with the current dimming output value for all lighting fixtures in the entire lighting area. The control unit is
When the flag for any representative dimming control area is on, the current dimming output value for the entire illumination area and the corresponding dimming control output value stored in the corresponding storage unit for each representative dimming control area 3. The representative illuminance dimming control system according to claim 2, wherein the average dimming output value subjected to the weighted average process is dimmed and output to all luminaires in the entire illumination area. The control unit is
After initializing the temporary correction value, when the flag for any representative dimming control area is on, the temporary correction value and the maximum of the corrected dimming output values of the representative dimming control area for which the flag is on The representative illuminance dimming control system according to claim 2, wherein the dimming output value is dimmed and output to all luminaires in the entire illumination area. One overall lighting area having a large number of lighting fixtures is divided into a plurality of dimming control areas, and at least one representative dimming control area is selected from the plurality of dimming control areas,
Only in this selected representative dimming control area, one representative illuminance sensor that measures the illuminance of the illuminated surface by the luminaire by the reflected light from the illuminated surface is arranged,
A control unit for dimming control of all lighting fixtures in the overall lighting area,
The current illuminance of the representative illuminance sensor is compared with the set illuminance, and when the current illuminance is lower than the set illuminance, the dimming output value for the representative dimming control area is increased and corrected, and the current illuminance is greater than the set illuminance. When it is high, the dimming output value for the representative dimming control area is decrementally corrected, and the dimming output value for the corrected representative dimming control area is output to all the lighting fixtures in the entire lighting area. A representative illuminance dimming control system that controls the dimming to the set illuminance by unifying the illuminance of
The control unit is
When the current illuminance exceeds a predetermined deviation from the set illuminance and is higher than the set illuminance, it is determined that the lighting fixture has been replaced and is in an excessive lighting state, and the dimming lower limit value of the lighting fixture is limited. The dimming output value for the representative dimming control area that has been reduced and corrected as a dimming output for all lighting fixtures in the entire lighting area,
When the current illuminance exceeds a predetermined deviation from the set illuminance and is lower than the set illuminance, it is determined that a lighting fixture in any lighting area within the representative dimming control area is in the extinguished state. Representative illuminance dimming control system that does not perform light control. The control unit is
A dimming permission counter that counts the number of times that the current illuminance exceeds a predetermined deviation from the set illuminance and is higher than the set illuminance,
When the dimming permission counter counts a predetermined number of times, it is determined that the lighting fixture has been replaced and is in an excessive lighting state, and the dimming output value is reduced and corrected with the dimming lower limit value of the lighting fixture as a limit. The representative illuminance dimming control system according to any one of claims 1 to 5. The control unit is
A control for counting that the current illuminance exceeds a predetermined deviation from the set illuminance, is higher than the set illuminance, and the current dimming output value corresponds to the dimming output lower limit value of the luminaire. With optical output lower limit counter,
When the dimming output lower limit counter counts a predetermined number of times, the dimming output value for the representative dimming control area at that time is dimmed and output to all lighting fixtures in the entire lighting area. The representative illuminance dimming control system according to any one of claims 1 to 5.