JP4635970B2 - Lighting control device - Google Patents

Description

  The present invention relates to a lighting control device.

  Conventionally, an illuminance sensor that measures the illuminance of an illuminated surface such as a desk top or a floor illuminated by a light source by reflected light, a storage unit that stores an illuminance level measured by the illuminance sensor, and an illuminance of the illuminated surface Many inventions related to a lighting device including a control unit that performs brightness feedback control in a direction of a target level are made (for example, see Patent Document 1).

  FIG. 14 shows a configuration of a conventional lighting device that performs brightness feedback control, and includes a dimming terminal 11 installed on a ceiling surface and a lighting fixture 12 whose light output is controlled by the dimming terminal 11. The This illuminating device is installed in an environment where light enters from an opening such as a window W provided on the wall, and performs illumination control for the purpose of energy saving by using external light under such an environmental condition.

  FIG. 15 is a block diagram illustrating the configurations of the light control terminal 11 and the lighting fixture 12, and the light control terminal 11 includes a control unit 11a, an illuminance sensor 11b, a storage unit 11c, and a remote control transmission / reception unit 11d. The lighting fixture 12 includes a light source 12a and a lighting circuit 12b that supplies lighting power to the light source 12a.

  The illuminance sensor 11b of the dimming terminal 11 has an inherent optical system and constantly measures the illuminance of a certain visual field, converts the measured illuminance into a voltage signal, and continuously outputs it as a sensor voltage to the control unit 11a. . This voltage signal is uniquely determined from the illuminance, and is approximately proportional to the illuminance. Here, a desk D is disposed directly below the light control terminal 11 installed on the ceiling surface in FIG. 14, and the illuminance sensor 11 b is from the desk upper surface illuminated by the light H <b> 1 a emitted from the light source 11 a of the lighting fixture 11. Reflected light H1b and reflected light H2b from the desk surface illuminated by the external light H2a through the window W are incident.

  The storage unit 11c stores one point of sensor voltage target value (hereinafter referred to as target sensor voltage) corresponding to the target illuminance on the desk surface, and this target sensor voltage is stored in an external remote control transmitter (not shown). The remote controller transmission / reception unit 11d receives the target value setting signal from) and stores it in the storage unit 11c.

  And the control part 11a reads the target sensor voltage from the memory | storage part 11c, and controls the lighting electric power supplied to the light source 12a so that the sensor voltage transmitted from the illumination intensity sensor 11b may turn into this target sensor voltage. Specifically, a PWM signal is transmitted from the control unit 11a of the dimming terminal 11 to the lighting circuit 12b of the lighting fixture 12, and the lighting circuit 12b supplies lighting power corresponding to the PWM signal to the light source 12a. The controller 11a changes the light output of the light source 12a by changing the pulse width of the PWM signal. In the present invention, the lighting power is represented by a value (0 to 100%) obtained by dividing the power supplied to the light source by the rated power of the light source.

  FIG. 16 shows the relationship between the sensor voltage output from the illuminance sensor 11b and the lighting power supplied to the light source 12a. The characteristic Y11 (solid line) shows the correlation in an environment without external light, and the characteristic Y12 ( A broken line) indicates a correlation in an environment where the incidence of external light is relatively small, and a characteristic Y13 (a chain line) indicates a correlation in an environment where the incidence of external light is relatively large. For example, if the target sensor voltage is Vp, the sensor voltage matches the target sensor voltage Vp only by the reflected light H1b from the light source 12a by lighting the light source 12a with 70% lighting power in an environment where there is no external light. When a small amount of external light is incident in this state, reflected light H2b due to external light is added, so that the sensor voltage exceeds the target sensor voltage Vp. Therefore, the control unit 11a of the dimming terminal 11 controls the sensor voltage to become the target sensor voltage Vp by reducing the lighting power supplied to the light source 12a by an amount corresponding to the reflected light H2b due to external light. That is, in FIG. 16, the lighting power is set to 50%. The same applies when a large amount of external light is incident, and the lighting power is set to 45% so that the sensor voltage maintains the target sensor voltage Vp. Thus, by maintaining the sensor voltage of the illuminance sensor 11b on the ceiling surface constant, energy-saving illumination control using outside light is performed while maintaining a predetermined brightness.

  However, in the lighting device, it is necessary for the builder to set a target value for each lighting control block by external setting means such as a remote control transmitter. Further, if there is a layout change or the like, the environmental conditions change and the reflectance of the irradiated surface changes, so that it is necessary to set the target value again to ensure appropriate brightness.

  Therefore, in order to solve the above problem, the following lighting control device has been proposed. As shown in FIG. 17, the illumination control device 21 is installed on the ceiling surface, and includes a control unit 21a, an illuminance sensor 21b, a storage unit 21c, a light source 21d, and a lighting circuit 21e that supplies lighting power to the light source 21d. Is provided.

First, in the shipping state when the power is first turned on, the control unit 21a of the illumination control device 21 turns on the light source 21d with a predetermined lighting power, for example, 70% lighting power. At this time, the control unit 21a obtains the sensor voltage of the illuminance sensor 21b and the lighting power (0% to 100%) at predetermined intervals, and a value obtained by dividing the obtained sensor voltage by the lighting power (hereinafter referred to as a calculated value). Calculated).
[Calculated value] = [Sensor voltage / Lighting power] (1)
And the minimum value (calculation minimum value) of the calculated value during this energization period (period from power-on to power-off) is stored in the storage unit 21c. Here, the calculated value is minimized at night when there is no outside light and the sensor voltage is minimized.
[Calculation minimum value] = Min [Sensor voltage / lighting power] (2)
In the next energization period, brightness feedback control is performed by setting the target sensor voltage by multiplying the calculated minimum value acquired in the previous energization period by the brightness feedback control upper limit value.
[Target sensor voltage] = Min [Sensor voltage / lighting power] × [Brightness feedback control upper limit value] (3)
Here, the brightness feedback control upper limit value is a characteristic that can compensate for a substantially constant design illuminance P (see FIG. 18C) by correcting the light beam decrease of the light source 21a over time (see FIG. 18A). As shown in FIG. 18B, the output curve has a function that increases as the cumulative lighting time increases from 70% at the time of shipment to 100% at the end of the life, and is supplied to the light source. The upper limit value of the lighting power is shown according to the cumulative lighting time. The brightness feedback control upper limit characteristic is stored in the storage unit 21c.

In this control logic, at night when there is no external light, the light incident on the illuminance sensor 21b is reduced to minimize the sensor voltage, and the lighting power is increased to increase the brightness feedback control upper limit (initially about 70%). Therefore, the calculated value is minimized at night. At this time, since [night lighting power] = [brightness feedback control upper limit value], if the minimum calculated value is multiplied by the brightness feedback control upper limit value,
[Target sensor voltage] = [Sensor voltage with about 70% lighting power at night] ......... (4)
It becomes.

  Thereafter, every time the power is turned on, the target sensor voltage is calculated in the same manner as described above using the feedback control upper limit value according to the accumulated lighting time at that time, and the control unit 21a maintains the target sensor voltage. To control the lighting power.

There is another reason for multiplying the brightness feedback control upper limit value to obtain the target sensor voltage. If the lighting power does not increase to 70%, which is the upper limit determined by the brightness feedback control upper limit value, for example, at night when there is no outside light, When the operation minimum value is
[Calculation minimum value] = Min [Sensor voltage / lighting power with 65% lighting power (= 65%)]
Based on this calculated minimum value, when the target sensor voltage for the next energization period is determined,
[Target sensor voltage] = [Sensor voltage with 65% lighting power / Lighting power (= 65%)] × [Brightness feedback control upper limit value (= 70%)]
It becomes.

That is, if the proportional relationship between the lighting power and the sensor voltage is established, the calculation with the lighting power of 70% is performed by multiplying the calculation minimum value at the lighting power of 65% during the previous energization period by the brightness feedback control upper limit value. It is corrected to the target sensor voltage based on the minimum value and can be used in the next energization period. (For example, see Patent Document 2)
As a merit of performing the control as in Patent Document 2 above, even when the environmental conditions change due to a layout change, etc., and the reflectivity on the desk top, floor, etc. changes, the nightly calculated minimum value after the layout change is obtained Thus, the target sensor voltage corresponding to the layout change can be set when the power is turned on the next day or the next day based on the calculated minimum value. That is, as in Patent Document 1, the lighting device acquires a calculated value without bothering a person to set the target value, and automatically sets the target sensor voltage when the power is turned on the next day or the next day. Can do.
JP-A-11-185974 JP 2006-40731 A

  However, the illumination control device of Patent Document 2 has the following problems. First, when calculating the calculation minimum value during the energization period, if a sensor voltage due to an extremely short illuminance drop is input, the target sensor voltage for the next energization period may be set to an unintended low value. is there. Accordingly, a slight increase in the amount of external light causes feedback control to be performed in a direction that reduces the light output of the light source, the reflected surface becomes dark, and it becomes difficult to ensure the stability of illuminance.

  In contrast to the above, when calculating the calculation minimum value during the energization period, if a sensor voltage due to an extremely high illuminance or a sensor voltage with daylight is input, the next energization period May be set to an unintended high value. Therefore, the lighting power is increased more than necessary, the energy consumption is increased, and it is difficult to ensure the stability of the illuminance.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an illumination control device capable of setting an appropriate target illuminance without being affected by an instantaneous illuminance change. .

The invention of claim 1 is a light source that is lit by supplying lighting power, an illuminance sensor that measures the illuminance of the irradiated surface illuminated by the light source by reflected light, and a measured value and lighting power of the illuminance sensor every predetermined time. And a control unit that calculates a calculated value obtained by dividing the measured value of the illuminance sensor by the lighting power, and a storage unit that stores the calculated value every predetermined time, and the control unit calculates the calculated value every predetermined time Calculate the moving average of the values, set the target illuminance based on the minimum value of the moving average, feedback control the lighting power supplied to the light source so that the measured value of the illuminance sensor becomes the target illuminance , When the supply of lighting power is stopped within a predetermined time after the supply is started, the above-mentioned feedback control is not performed when the supply of lighting power is started next, and the luminous flux decrease of the light source corresponding to the cumulative lighting time is corrected. Lights up as Characterized by controlling the force.

According to the present invention, since the target illuminance is set based on the moving average of the calculated values, an appropriate target illuminance can be obtained even when the measured value of the illuminance sensor due to an instantaneous decrease in illuminance and increase in illuminance is input. It can be set, and the stability of illuminance can be ensured. Even when the energization period is short and the moving average of the calculated values cannot be calculated, the illuminance of the irradiated surface can be appropriately controlled during the next energization period.

  The invention according to claim 2 is the control device according to claim 1, wherein the control unit does not perform the feedback control when the target illuminance is greater than or equal to the measurement upper limit value of the illuminance sensor or less than or equal to the measurement lower limit value of the illuminance sensor. The lighting power is controlled so as to correct the decrease in luminous flux of the light source according to the cumulative lighting time.

According to this invention, even when the target illuminance is outside the measurable range of the illuminance sensor, the illuminance of the irradiated surface can be controlled appropriately .

The invention according to claim 3 is the moving average calculated according to claim 1 or 2, in which the control unit calculates each moving average and the moving average after the moving average in the energization period from the start of supply of the lighting power to the stop. If the sign of the difference deviates more than a predetermined ratio to positive or negative within the energization period, the cumulative lighting time is not performed when the supply of lighting power is started next, and the feedback control is not performed. The lighting power is controlled so as to correct the decrease in luminous flux of the light source according to the above.

  According to the present invention, it is possible to prevent a moving average of calculation values from being erroneously acquired under the influence of external light, and to appropriately control lighting power even in the next energization period.

According to a fourth aspect of the present invention, when the control unit supplies the lower limit value of the lighting power for a predetermined time or more in the first to third aspects, the feedback is started when the supply of the lighting power is started next. It is characterized in that the lighting power is controlled so as to correct the light beam decline of the light source according to the cumulative lighting time without performing the control.

  According to the present invention, it is possible to prevent a moving average of calculation values from being erroneously acquired under the influence of external light, and to appropriately control lighting power even in the next energization period.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the control unit sets the target illuminance based on the minimum value of the moving average calculated during the previous energization period when the power is turned on to start supplying the lighting power. When setting and changing the target illuminance from the target illuminance during the previous energization period, the target illuminance is increased step by step each time the power is turned on so that the target illuminance change is completed when the power is turned on multiple times. Or, it is reduced.

  According to the present invention, even when the target illuminance is changed due to the layout change, it is possible to control the lighting without giving the user a feeling of discomfort or discomfort by changing the luminance of the light source stepwise.

As described above, the present invention has an effect that an appropriate target illuminance can be set without being affected by an instantaneous change in illuminance. Even when the energization period is short and the moving average of the calculated values cannot be calculated, the illuminance of the irradiated surface can be appropriately controlled during the next energization period.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

( Basic configuration 1 )
The lighting control device 1 having the basic configuration is installed on a ceiling surface, and as shown in FIG. 1, a control unit 1a, an illuminance sensor 1b, a storage unit 1c, a light source 1d, a lighting circuit 1e, and an operation unit. 1f.

  The illuminance sensor 1b has a unique optical system and constantly measures the illuminance of a fixed visual field, converts the measured illuminance into a voltage signal, and continuously outputs it as a sensor voltage to the control unit 1a. This voltage signal is uniquely determined from the illuminance, and is approximately proportional to the illuminance. Here, in FIG. 2, there are irradiated surfaces F such as a desk top surface and a floor surface directly under the illumination control device 1 installed on the ceiling surface B, and the illuminance sensor 1 b is irradiated with light output from the light source 1 d. In addition to the reflected light from the surface F, reflected light from the irradiated surface F of external light such as daylight entering through the window is also incident, and the illuminance of the irradiated surface F is detected by the reflected light.

As shown in FIG. 3, the illumination control device 1 has two fluorescent lamps, which are a reflecting plate 1p and a light source 1d, attached to the lower surface thereof, and the illuminance sensor 1b has an opening 1q provided substantially at the center of the reflecting plate 1p. The light receiving surface is exposed. At this time, the illuminance sensor 1b is disposed inside the reflector 1p so that the illumination light emitted from the light source 1d does not directly enter the illuminance sensor 1b. Further, the detection range of the illuminance sensor 1b is in the configuration in which one of the dimming terminal 11 as shown in FIG. 14 controls the plurality of lighting fixtures 12, but ranged in diameter from about 4m, as in this basic structure In the case where the light source and the control unit are integrated, the diameter is in the range of about 2 m, and the reflected light emitted by itself is recognized with higher sensitivity, and the influence of the illumination light of the adjacent lighting fixture is reduced. Has been.

  Next, the control unit 1a includes an amplification circuit 1g that amplifies the sensor voltage from the illuminance sensor 1b, a calculation unit 1h that calculates an output voltage (target sensor voltage) of the illuminance sensor 1b that is a target illuminance for illumination control, and a light source 1d includes a dimming signal output unit 1j that outputs a PWM signal for dimming control, and the calculation unit 1h includes a CPU 1k.

  The storage unit 1c is configured by a nonvolatile memory such as an EEPROM, and stores each data and set value from the CPU 1k.

  The lighting circuit 1e receives the commercial power supply AC and supplies lighting power corresponding to the PWM signal to the light source 1d. The light source 1d is composed of, for example, one or more fluorescent lamps.

  The operation unit 1f is configured by a switch that turns on / off the power supply from the lighting circuit 1e to the light source 1d when operated by the user, and is provided on a wall surface of the room.

Hereinafter, the operation of the illumination control device 1 having the basic configuration will be described. First, the CPU 1k of the control unit 1a normally supplies the lighting power supplied to the light source 1d so that the sensor voltage of the illuminance sensor 1b via the amplifier circuit 1g becomes the target sensor voltage calculated by the calculation unit 1h regardless of day or night. To control. In other words, the power supplied to the light source 1d is controlled based on the sensor voltage of the illuminance sensor 1b so that the illuminance on the irradiated surface becomes substantially constant.

This target sensor voltage is set as follows. First, when the operation unit 1f is operated to start supplying lighting power to the light source 1d (when the power is turned on), the calculation unit 1h displays the sensor voltage of the illuminance sensor 1b and the lighting power (0% to 100%). Is obtained every minute, a calculated value obtained by dividing the obtained sensor voltage by the lighting power is obtained, and the calculated value is stored in the storage unit 1c.
[Calculated value] = [Sensor voltage / Lighting power] (5)
After 10 minutes have elapsed since the power was turned on and 10 calculated values are stored in the storage unit 1c, the calculating unit 1h reads the 10 calculated values from the storage unit 1c, and the average value of the 10 calculated values. Is stored in the storage unit 1c. Thereafter, by calculating the average of the latest 10 calculated values, the moving average of the calculated values (calculated moving average value) is obtained every minute, and only the minimum calculated moving average value (calculated moving average minimum value) is obtained. It is stored and updated in the storage unit 1c.
[Calculation moving average minimum value] = Min [(calculation value 1 + calculation value 2+... + Calculation value 10) / 10] (6)
Then, after the operation unit 1f is operated to stop the supply of lighting power to the light source 1d and the current energization period ends, the calculation unit 1h obtains the calculated moving average obtained during the previous energization period when the power is turned on next time. A value obtained by multiplying the minimum value by the brightness feedback control upper limit value corresponding to the cumulative lighting time is set as the target sensor voltage, and the CPU 1k performs brightness feedback control.
[Target sensor voltage] = [Calculated moving average minimum value] x [Brightness feedback control upper limit value] (7)
The characteristic of the brightness feedback control upper limit value is stored in the storage unit 1c. This characteristic has been described in detail in the background art, and the description thereof will be omitted.

  FIGS. 4A to 4D show the transition of each value during the energization period until the illumination control device 1 is turned on at 5 am and turned off at 22:00.

  First, when the power is turned on at 5:00 in the morning, the lighting control device 1 increases the lighting power because there is no external light, and the brightness feedback control upper limit value (for example, about 70%) according to the cumulative lighting time at that time. The lighting power is set to 1 and the light source 1d is turned on. It is assumed that the target sensor voltage at this time is set to the sensor voltage when the light source 1d is lit with the brightness feedback control upper limit value corresponding to the cumulative lighting time under the condition where there is no external light. Since there is no outside light until 9:00 am, the lighting power maintains the brightness feedback control upper limit value. During this time, the illuminance of the illuminated surface directly under the illumination control device 1 is not affected by external light and is determined only by the light source 1d. Keep the value.

  Next, from 9 o'clock to 11 o'clock, the external light amount gradually increases, and the illumination control device 1 causes the sensor voltage to approach the target sensor voltage by brightness feedback control as the external light amount increases. In order to reduce the lighting power of the light source 1d, the illuminated surface illuminance and the ceiling surface illuminance are constant values. Since the ceiling surface illuminance is constant, the sensor voltage is constant, but since the lighting power is gradually reduced, the calculated value according to the equation (5) is gradually increased.

  Next, from 11 o'clock to 13 o'clock, the amount of external light increases, the lighting power decreases to the lower limit PL, and the light source 1d is supplied with the lower limit PL of the lighting power. Out of range. However, the amount of external light continues to increase during this time, and the illumination intensity on the irradiated surface and the illumination on the ceiling surface increase with the increase in the external light amount. The calculated value also tends to increase because the lighting power keeps the lower limit PL and the sensor voltage increases, but the sensor voltage saturates at a certain value and the calculated value becomes constant.

  Next, from 13:00 to 17:00, it is a time zone in which the external light quantity starts to decrease past the peak and the irradiated surface illuminance and ceiling surface illuminance also begin to decrease. However, since the external light amount is large with respect to the target sensor voltage, the lighting power still maintains the lower limit PL. When the external light amount falls below a certain value, the calculated value gradually decreases from the saturated state.

  Next, from 17:00 to 19:00, the illumination intensity on the irradiated surface and the illumination on the ceiling surface also decrease with a decrease in the external light amount, and the sensor voltage falls below the target sensor voltage. The lighting power of the light source 1d gradually increases so that the sensor voltage approaches the target sensor voltage by feedback control, and the illuminated surface illumination and the ceiling surface illumination become constant values. The calculated value tends to decrease because the sensor voltage is constant and the lighting power gradually increases.

  Next, from 19:00 to 22:00, there is no influence of external light, the lighting power is set to the brightness feedback control upper limit value corresponding to the cumulative lighting time at that time, and the light source 1d is turned on. During this time, the illumination surface illumination, ceiling illumination, lighting power, and calculated values are constant by brightness feedback control. If brightness feedback control is performed using the target sensor voltage calculated based on the calculated value obtained in this time zone, an illumination space in which the design illuminance can be reliably obtained is obtained.

  Next, the operation when there is a sudden change in external light will be described. First, when the target sensor voltage is set based on the calculated minimum value that is the smallest calculated value during the energization period as in the prior art (see the above equation (3)), the sensor voltage instantaneously decreases due to a sudden decrease in external light quantity. If the irregular calculated value when a significant drop occurs is smaller than the calculated value obtained at night (see the part Z1 in FIG. 5 (a)), based on the irregular calculated value, in the next energization period A target sensor voltage is set. The target sensor voltage set in this way is unintentionally set to a small value, resulting in a problem that the design illuminance cannot be secured by brightness feedback control.

On the other hand, in this basic configuration , the moving average of the calculated values (calculated moving average value) is obtained every minute, and the target sensor voltage is set based on the minimum calculated moving average value which is the minimum calculated moving average value ( Even if an instantaneous drop in the sensor voltage occurs, the instantaneous change can be absorbed by calculating the moving average of the calculated values, and an appropriate target sensor voltage in the next energization period can be obtained. Can be set. That is, even when the external light amount increases or decreases instantaneously, the calculated moving average minimum value is not easily influenced (see the part Z2 in FIG. 5B), and thus is affected by the instantaneous illuminance change. Therefore, an appropriate target sensor voltage can be set.

( Basic configuration 2 )
The configuration of the lighting control device of this basic configuration is shown in FIG. 1 similarly to the basic configuration 1, and the same components are denoted by the same reference numerals and description thereof is omitted.

The operation of this basic configuration will be described below with reference to FIG. First, in the illuminance sensor 1b, a measurement range that is a measurable range is set in advance. If the target sensor voltage obtained based on the calculated moving average minimum value is equal to or higher than the measurement upper limit value VH or lower than the measurement lower limit value VL as in the above equation (7), the target sensor voltage is not set. The lighting power is controlled to the brightness feedback control upper limit value (see FIG. 18B) corresponding to the cumulative lighting time (hereinafter, control for setting the lighting power to the brightness feedback control upper limit value corresponding to the cumulative lighting time. Is called timer control).

Here, when performing brightness feedback control, the target sensor voltage is set. However, if the target value is not wide, it is difficult to ensure stability in performing feedback control. If the sensor voltage is within the correction width ± Va of the target sensor voltage, the lighting power is not changed assuming that it is controlled to the target value. That is, when the sensor voltage change is minute, it is preferable to maintain a constant state rather than performing brightness feedback control in accordance with this minute change because it makes the user feel that the light output is stable. If the sensor voltage is within the correction width Va with respect to the target sensor voltage, it is treated as a minute change, and brightness feedback control is not performed. That is, it can be said that a play in which the light output does not change with a minute change in the sensor voltage is set by the correction width ± Va. In this basic configuration , the correction width ± Va is set to ± 5% of the target sensor voltage.

  On the other hand, the range of the sensor voltage that can be recognized by the CPU 1k is generally 0 to Vcc (Vcc is the power supply voltage of the CPU 1k), and the sensor voltage that can secure the correction width ± Va is limited. For example, since the upper limit of the sensor voltage is determined by the power supply voltage Vcc, the upper limit value VH of the target sensor voltage is VH = Vcc / 1.05 when considering a correction width of ± 5%.

  The sensor voltage is subjected to A / D conversion by the control unit 1a and is handled as a digital value in the control unit 1a. The lower limit value VL of the target sensor voltage is a digital value obtained by A / D converting the lower limit value VL. However, the change amount of the sensor voltage when the lighting power is changed by 1% which is the minimum control unit of the load output is set to be larger than the digital value obtained by A / D conversion.

  When the target sensor voltage calculated at the time of turning on the power is equal to or higher than the measurement upper limit value VH or lower than the measurement lower limit value VL, the correction width ± Va cannot be secured. Therefore, in such a case, the lighting power is controlled while correcting the luminous flux decrease of the light source 1d by performing timer control for controlling the lighting power to the brightness feedback control upper limit value corresponding to the cumulative lighting time. The target sensor voltage is set at the next power-on based on the calculated moving average minimum value acquired during timer control.

( Embodiment 1 )
The configuration of the illumination control device of the present embodiment is shown in FIG. 1 similarly to the basic configuration 1, and the same components are denoted by the same reference numerals and description thereof is omitted.

In the basic configuration 1 , the calculation unit 1h obtains a calculated value based on the sensor voltage of the illuminance sensor 1b acquired every minute and the lighting power (0% to 100%), and further, a moving average of 10 calculated values. Is obtained every minute, so that even if a momentary drop in the sensor voltage occurs, the instantaneous change is absorbed by calculating the moving average of the calculated values. That is, after 10 minutes have elapsed since the power was turned on, the moving average of the calculated values is obtained every minute.

  However, if the power is turned off within 10 minutes after the power is turned on, the moving average cannot be obtained. In such a case, the brightness corresponding to the cumulative lighting time is determined in the next energization period. By performing the timer control for controlling the lighting power to the feedback control upper limit value, the lighting power is controlled while correcting the light beam decrease of the light source 1d. Based on the calculated moving average minimum value obtained during this timer control, Set the target sensor voltage when the power is turned on.

( Embodiment 2 )
The configuration of the illumination control device of the present embodiment is shown in FIG. 7, and the same reference numerals are given to the same configurations as the basic configuration 1 and the description thereof is omitted.

  If the calculated moving average value obtained during the energization period is not based on the nighttime data but is calculated in the presence of external light, the calculated moving average value for the next energization period is based on such calculated moving average value. When the target sensor voltage is set, the target sensor voltage may be set to an unintended high value, and there is a possibility that the lighting power is increased more than necessary and the energy consumption is increased. Therefore, not only the minimum calculated moving average value (the calculated moving average minimum value) but also all the calculated moving values during the energization period in order to determine whether or not the calculated moving average value has been calculated in the presence of external light. The control unit 1a is provided with an external light determination unit 1m that stores the average value in the storage unit 1c and determines whether the external light is data under a certain condition based on all the stored calculated moving average values. The external light discriminating unit 1m is composed of a CPU 1k as in the calculation unit 1h.

  First, in a normal sunshine environment in which the illuminance of the irradiated surface increases due to the influence of external light as the solar altitude rises, and the illuminance decreases after passing the peak of the solar altitude, FIGS. Each value changes as shown in d) (in addition, the change of each value is the same as that shown in FIGS. 4A to 4D).

Here, the time transition of the calculated moving average value is as shown in FIG.
1. Monotonically increasing (eg, period T1)
2. Monotonous decrease (eg, period T2)
3. A constant value (for example, period T3)
4.1. ~ 3. It is classified into four patterns with anomalous characteristics other than.

  Above 1. ~ 4. Among the patterns of 4. It is difficult to determine whether the pattern is an arithmetic moving average value under a certain external light condition or an arithmetic moving average value under the influence of an adjacent lighting fixture that is lit at a constant illuminance. However, the above 1.2. With respect to the pattern, it is possible to determine whether or not the calculated moving average value is obtained under a condition in which ambient light is present, based on the calculated moving average value and each time transition of the lighting power.

  The determination method can be realized by performing the following processing in the control unit 1a. First, during the energization period, the time transition of the calculated moving average value calculated by the calculating unit 1h every minute is stored in the storage unit 1c, and the outside light discriminating unit 1m is one minute before the calculated moving average value stored this time. The size is compared with the stored calculated moving average value, and the comparison result is stored in the storage unit 1c. If the number of times that the calculated moving average value is greater than the calculated moving average value of one minute before the total number of comparisons in one energization period is 70% or more, the calculated moving average value is monotonous due to external light. It judges that it has increased (pattern of said 1.), and cancels the arithmetic moving average value acquired during this energization period. If the number of times that the calculated moving average value is smaller than the calculated moving average value of one minute before the total number of comparisons in one energization period is 70% or more, the calculated moving average value is monotonous due to external light. It is determined that the value has decreased (the pattern of 2. above), and the calculated moving average value acquired during this energization period is discarded.

  If it is determined that the calculated moving average value is monotonously increasing or monotonically decreasing due to the influence of external light and the calculated moving average value is discarded, the target sensor voltage cannot be set at the next power-on. Therefore, at the next energization, the timer power for controlling the lighting power to the brightness feedback control upper limit value corresponding to the cumulative lighting time is performed, thereby controlling the lighting power while correcting the light beam decrease of the light source 1d. The target sensor voltage is set at the next power-on based on the calculated moving average minimum value acquired during the operation.

  Therefore, by discarding the calculated moving average value under the influence of external light, it is possible to prevent the calculation moving average value from being erroneously acquired under the influence of external light, and when the calculated moving average value is discarded. The timer power for controlling the lighting power to the brightness feedback control upper limit value according to the cumulative lighting time can be appropriately controlled even in the next energization period.

  Also, out of all the comparison times in one energization period, the number of times that the calculated moving average value is larger than the calculated moving average value one minute ago is less than 70%, and the calculated moving average value is one minute before the calculated moving value. If the number of times smaller than the average value is less than 70%, the external light discriminating unit 1m determines that there is no external light, validates the calculated moving average value acquired during the energization period, and sets the minimum of these calculated moving average values. The target sensor voltage is calculated using the calculated moving average value.

( Embodiment 3 )
The configuration of the illumination control device of this embodiment is shown in FIG. 9, and the same reference numerals are given to the same configurations as the basic configuration 1 and the description thereof is omitted.

  If the calculated moving average value obtained during the energization period is not based on the nighttime data but is calculated in the presence of external light, the calculated moving average value for the next energization period is based on such calculated moving average value. When the target sensor voltage is set, the target sensor voltage may be set to an unintended high value, and there is a possibility that the lighting power is increased more than necessary and the energy consumption is increased. Therefore, in order to determine whether or not the calculated moving average value is calculated in the presence of external light, an external light determination unit 1n that determines whether or not the external light is data under a certain condition is provided in the control unit 1a. ing. The external light discriminating unit 1n is composed of a CPU 1k as in the calculation unit 1h.

  As the external light amount increases, the lighting power of the light source 1d decreases so that the sensor voltage approaches the target sensor voltage by brightness feedback control, and when the external light amount further increases, the lighting power decreases to the lower limit PL (FIG. 4). (See (b)). Therefore, the external light determination unit 1n determines whether or not the state in which the lighting power is reduced to the lower limit value PL due to the influence of external light continues for a predetermined time, and determines that there is external light when the predetermined time continues, The calculated moving average value acquired during this energization period is discarded.

  When the outside light discriminating unit 1n determines that there is outside light and discards the calculated moving average value, the calculated moving average minimum value cannot be calculated, and therefore the target sensor voltage cannot be set at the next power-on. . Therefore, at the next energization, the timer power for controlling the lighting power to the brightness feedback control upper limit value corresponding to the cumulative lighting time is performed, thereby controlling the lighting power while correcting the light beam decrease of the light source 1d. The target sensor voltage is set at the next power-on based on the calculated moving average minimum value acquired during the operation.

  Therefore, by discarding the calculated moving average value under the influence of external light, it is possible to prevent the calculation moving average value from being erroneously acquired under the influence of external light, and when the calculated moving average value is discarded. The timer power for controlling the lighting power to the brightness feedback control upper limit value according to the cumulative lighting time can be appropriately controlled even in the next energization period.

( Embodiment 4 )
The configuration of the illumination control device of the present embodiment is shown in FIG. 10, and the same reference numerals are given to the same configurations as the basic configuration 1 and the description thereof is omitted.

In the basic configuration 1 , a moving average of calculated values (calculated moving average value) is obtained every minute, and only the minimum calculated moving average value (calculated moving average minimum value) is stored and updated in the storage unit 1c. When the power is turned on, the target sensor voltage is set by multiplying the calculated moving average minimum value by the brightness feedback control upper limit value as shown in the above equation (7) (hereinafter referred to as first learning control). However, as shown in FIGS. 11 (a) and 11 (b), when the calculated moving average value increases before and after the layout change t20 and the target sensor voltage changes greatly at the next power-on, the light source before the layout change There is a significant difference between the luminance of 1d and the luminance of the light source 1d after the layout change, which may cause the user to feel uncomfortable or uncomfortable. Therefore, in the present embodiment, the calculation unit 1h changes the target sensor voltage step by step so that the user does not feel uncomfortable or uncomfortable.

Therefore, the final value of the target sensor voltage after the layout change (final target sensor voltage) is obtained,
[Final target sensor voltage] = [Calculated moving average minimum value] × [Brightness feedback control upper limit value] (8)
The correction value is obtained by dividing the difference between the final target sensor voltage and the target sensor voltage before the layout change by 3.
[Correction value] = {[Final target sensor voltage] − [Previous target sensor voltage]} / 3 (9)
The reason for dividing by 3 is to change the target sensor voltage in three stages.

Then, the correction value is added to the previous target sensor voltage to set the current target sensor voltage.
[Current target sensor voltage] = [Previous target sensor voltage] + [Correction value] (10)
By performing this process every time the power is turned on, the target sensor voltage changes in three stages. When the power is turned on for the third time, the final target sensor voltage is reached, and the change of the target sensor voltage is completed (hereinafter, the second learning control and Called).

  In the present embodiment, there are three control modes of the first learning control, the second learning control, and the timer control, and the user can switch to one of the control modes by operating the mode switching unit 1r. .

Since the first learning mode is described in the basic configuration 1 and the timer control is described in the basic configuration 2 , hereinafter, the second learning mode when the flooring material is changed from the low reflectance to the high reflectance will be described. Learning control will be described with reference to FIGS.

  First, with the control mode set to the first learning control, the CPU 1k controls the lighting power to the brightness feedback control upper limit value corresponding to the cumulative lighting time “0” at the first power-on after shipment ( The characteristic of the high output type lighting circuit shown in FIG. 18B is 73%, and the characteristic of the rated output type lighting circuit (not shown) is 50%.) The calculation unit 1h calculates the calculated moving average value during the energization period every minute. The minimum calculated moving average value (calculated moving average minimum value) Xa is stored in the storage unit 1c. And at night, the power is turned off and the light goes out.

When the power is turned on for the second time, the calculation unit 1h uses the calculated moving average minimum value Xa stored in the storage unit 1c during the first energization period based on the above equation (7) [target sensor voltage Vs2]. = [Calculated moving average minimum value Xa] x [brightness feedback control upper limit value]
The CPU 1k controls the lighting power so that the sensor voltage becomes the target sensor voltage Vs2. If the layout is changed to change the floor material directly under the light source 1d from the low reflectance to the high reflectance at time t1 during the energization period, the amount of reflected light incident on the illuminance sensor 1b increases. With respect to the set target sensor voltage Vs2, the lighting power after the layout change is controlled in a direction to reduce compared to the lighting power before the layout change, and the illuminance on the irradiated surface becomes dark. During this second energization period, the illuminance of the irradiated surface remains dark. Even during this second energization period, the calculated moving average minimum value calculated by the above equation (6) is stored in the storage unit 1c, but the moving average value Xa of the calculated value before the layout change is Since it is smaller than the moving average value Xb of the calculated value after the layout change with reduced lighting power, the moving average value Xa acquired before the layout change is stored as the calculated moving average minimum value in the storage unit 1c.

The third power-on is performed after the user switches the control mode to the second learning control (time t2), and lighting control is performed in a state where the floor surface reflectance is high by the previous layout change. In the second energization period, the calculated moving average minimum value Xa acquired before the layout change is stored in the storage unit 1c, and the final target sensor voltage Vsa is the calculated moving average minimum acquired before the layout change. Based on the value Xa, from the above equation (8),
[Final target sensor voltage Vsa] = [calculated moving average minimum value Xa] × [brightness feedback control upper limit value]
Is calculated by At this time, since there is no difference between the previous target sensor voltage Vs2 and the final target sensor voltage Vsa, from the above equation (9),
[Correction value H3] = {[final target sensor voltage Vsa]-[previous target sensor voltage Vs2]} / 3 = 0
From the above equation (10),
[Current target sensor voltage Vs3] = [Previous target sensor voltage Vs2]
It becomes.

  Therefore, in the third energization period, the illuminance of the irradiated surface is controlled to be dark as in the previous time. Further, as the calculated moving average minimum value, Xb which is the moving average value after the layout change is stored in the storage unit 1c.

The fourth power-on is performed in a state where the control mode is set to the second learning control, and the reflectance change of the irradiated surface due to the layout change is reflected in the target sensor voltage. First, the final target sensor voltage Vsb is calculated based on the calculated moving average minimum value Xb obtained after the layout change [final target sensor voltage Vsb] = [calculated moving average minimum value Xb] × [brightness feedback control upper limit value].
[Correction value H4] = {[Final target sensor voltage Vsb]-[Previous target sensor voltage Vs3]} / 3
From the above equation (10),
[Current target sensor voltage Vs4] = [Previous target sensor voltage Vs3] + [Correction value H4]
It becomes.

  Therefore, in the fourth energization period, the target sensor voltage becomes larger than the previous time, so that the lighting power increases and the illuminance on the irradiated surface becomes brighter.

The power is turned on for the fifth time in a state where the control mode is set to the second learning control. Since the previous calculated moving average minimum value is Xb, the final target sensor voltage is set to Vsb as in the previous time. From the above equation (9), [correction value H5] = {[target sensor voltage Vsb] − [previous target sensor voltage Vs4]} / 3.
It becomes.

  Here, the correction value H4 is calculated even in the fourth energization period, and which of the correction value H4 and the correction value H5 is to be adopted is determined as follows. When the sign of the correction value H4 calculated last time is the same as that of the correction value H5 calculated this time and the correction value H5 has an absolute value larger than the correction value H4, or when the correction value H4 calculated last time is calculated this time. When the signs differ from the correction value H5, the correction value H5 is adopted. In cases other than the above, the correction value H4 is adopted. According to this process, the correction value H4 calculated last time has the same sign as the correction value H5 calculated this time and has an absolute value larger than the correction value H5, so the correction value H4 is adopted.

Therefore, from the above equation (10),
[Current target sensor voltage Vs5] = [Previous target sensor voltage Vs4] + [Correction value H4]
Thus, since the target sensor voltage is further increased from the previous time, the lighting power is further increased, and the illuminance on the irradiated surface is also brightened.

The sixth power-on is performed with the control mode set to the second learning control. Since the previous calculated moving average minimum value is Xb, the final target sensor voltage is set to Vsb as in the previous case. From the above equation (9), [correction value H6] = {[target sensor voltage Vsb] − [previous target sensor voltage Vs5]} / 3.
It becomes.

Since the correction value H4 has the same sign as the correction value H6 calculated this time and has an absolute value larger than the correction value H6, the correction value H4 is adopted. From the above equation (10),
[Current target sensor voltage Vs6] = [Previous target sensor voltage Vs5] + [Correction value H4]
Thus, since the target sensor voltage is further increased from the previous time, the lighting power is further increased, and the illuminance on the irradiated surface is also brightened. Then, the current target sensor voltage Vs6 = the final target sensor voltage Vsb, and the stepwise change process of the target sensor voltage is completed.

  The power is turned on after the seventh time in a state in which the control mode is set to the second learning control, but the calculation unit 1h stores the number of calculations after the correction value to be adopted is determined. When the power is turned on for the seventh and subsequent times when the number of computations reaches three, the same target sensor voltage (for example, [current target sensor voltage Vs7] = [previous target] is used until the next layout change without adopting the correction value. Sensor voltage Vs6]).

  In this way, the target sensor voltage is updated in three stages toward the final target sensor voltage determined at the time of power-on for the fourth time, and the illuminance of the irradiated surface is gradually increased by brightness feedback control, thereby providing a light source. The lighting control is performed without changing the luminance of 1d stepwise without causing the user to feel uncomfortable or uncomfortable.

( Embodiment 5 )
The configuration of the illumination control apparatus of this embodiment is shown in FIG. 10, and the same reference numerals are given to the same configurations as those of Embodiment 4 and the description thereof is omitted.

Although Embodiment 4 demonstrated the 2nd learning control at the time of changing a flooring material from a low reflectance to a high reflectance (refer FIG. 12 (a)-(c)), in this embodiment, a flooring is used. The second learning control when the high reflectance is changed to the low reflectance will be described with reference to FIGS.

  First, with the control mode set to the first learning control, the CPU 1k controls the lighting power to the brightness feedback control upper limit value corresponding to the cumulative lighting time “0” at the first power-on after shipment, The calculation unit 1h obtains the calculated moving average value during the energization period every minute, and stores the minimum calculated moving average value (calculated moving average minimum value) Xc in the storage unit 1c. And at night, the power is turned off and the light goes out.

When the power is turned on for the second time, the calculation unit 1h uses the calculated moving average minimum value Xc stored in the storage unit 1c during the first energization period based on the above equation (7) [target sensor voltage Vs12]. = [Calculated moving average minimum value Xc] × [Brightness feedback control upper limit value]
The CPU 1k controls the lighting power so that the sensor voltage becomes the target sensor voltage Vs12. At time t11 during the energization period, if the layout is changed to change the flooring directly under the light source 1d from one having high reflectance to one having low reflectance, the amount of reflected light incident on the illuminance sensor 1b is reduced. With respect to the set target sensor voltage Vs12, the lighting power after the layout change is controlled to increase in comparison with the lighting power before the layout change, and the illuminance on the irradiated surface becomes brighter. During the second energization period, the illuminated surface continues to be bright. Even during the second energization period, the calculated moving average minimum value calculated by the above equation (6) is stored in the storage unit 1c. Since the average value Xd is smaller than the moving average value Xc of the calculated value before the layout change, the moving average value Xd acquired after the layout change is stored as the calculated moving average minimum value Xd in the storage unit 1c.

The third power-on is performed after the user switches the control mode to the second learning control (time t12), and lighting control is performed in a state where the floor surface reflectance is low due to the previous layout change. In the second energization period, the calculated moving average minimum value Xd acquired after the layout change is stored in the storage unit 1c, and the final target sensor voltage Vsd is the calculated moving average minimum value Xd acquired after the layout change. From the above equation (8),
[Final target sensor voltage Vsd] = [calculated moving average minimum value Xd] × [brightness feedback control upper limit value]
Is calculated by

And from the above equation (9),
[Correction value H13] = {[Final target sensor voltage Vsd]-[Previous target sensor voltage Vs12]} / 3
From the above equation (10),
[Current target sensor voltage Vs13] = [Previous target sensor voltage Vs12] + [Correction value H13]
Thus, the reflectance change of the irradiated surface due to the layout change is reflected in the target sensor voltage.

  Therefore, in the third energization period, the target sensor voltage becomes smaller than the previous time, so that the lighting power is reduced and the illuminance on the irradiated surface is also darkened.

The fourth power-on is performed with the control mode set to the second learning control, and since the previous calculated moving average minimum value is Xd, the final target sensor voltage is set to Vsd as in the previous case. From the above equation (9), [correction value H14] = {[target sensor voltage Vsd]-[previous target sensor voltage Vs13]} / 3.
It becomes.

Since the correction value H13 has the same sign as the correction value H14 calculated this time and has an absolute value larger than the correction value H14, the correction value H13 is adopted. From the above equation (10),
[Current target sensor voltage Vs14] = [Previous target sensor voltage Vs13] + [Correction value H13]
It becomes.

  Therefore, in the fourth energization period, the target sensor voltage is further reduced from the previous time, so that the lighting power is further reduced and the illumination intensity of the irradiated surface is also darkened.

The power is turned on for the fifth time in a state where the control mode is set to the second learning control. Since the previous calculated moving average minimum value is Xd, the final target sensor voltage is set to Vsd as in the previous case. From the above equation (9), [correction value H15] = {[target sensor voltage Vsd]-[previous target sensor voltage Vs14]} / 3.
It becomes.

Since the correction value H13 has the same sign as the correction value H15 calculated this time and has an absolute value larger than the correction value H15, the correction value H13 is adopted. From the above equation (10),
[Current target sensor voltage Vs15] = [Previous target sensor voltage Vs14] + [Correction value H13]
Thus, since the target sensor voltage is further reduced from the previous time, the lighting power is further reduced, and the illuminance of the irradiated surface is also darkened. The current target sensor voltage Vs15 = the final target sensor voltage Vsd, and the stepwise change process of the target sensor voltage is completed.

  The power is turned on after the sixth time in a state in which the control mode is set to the second learning control, but the calculation unit 1h stores the number of calculations after the correction value to be adopted is determined. When the power is turned on after the sixth time when the number of computations reaches 3, the correction value is not adopted and the same target sensor voltage (for example, [current target sensor voltage Vs16] = [previous target] is used until the next layout change. Sensor voltage Vs15]).

  In this way, the target sensor voltage is updated in three stages toward the final target sensor voltage determined at the time of power-on for the third time, and the illuminance of the irradiated surface is gradually darkened by brightness feedback control. The lighting control is performed without changing the luminance of 1d stepwise without causing the user to feel uncomfortable or uncomfortable.

In addition, if the said basic structures 1 and 2 and Embodiment 1-5 are combined suitably, each effect can be acquired with one lighting control apparatus.

It is a figure which shows the block configuration of the illumination control apparatus of the basic composition 1 . It is a figure which shows the installation state same as the above. It is a figure which shows the external appearance seen from the lower surface same as the above. (A)-(d) It is a figure which shows the time transition of each value same as the above. (A) (b) It is a figure which shows the operation | movement with respect to the external light change same as the above. It is a figure which shows the measurement range of an illumination intensity sensor same as the above. It is a figure which shows the block configuration of the illumination control apparatus of Embodiment 2. FIG. (A)-(d) It is a figure which shows the time transition of each value same as the above. It is a figure which shows the block configuration of the illumination control apparatus of Embodiment 3 . It is a figure which shows the block configuration of the illumination control apparatus of Embodiment 4 . (A) (b) It is a figure which shows the time transition of each value in 1st learning control same as the above. (A)-(c) It is a figure which shows the time transition of each value in 2nd learning control same as the above. (A)-(c) It is a figure which shows the time transition of each value in the 2nd learning control of the illumination control apparatus of Embodiment 5. FIG. It is a figure which shows the installation state of the conventional illuminating device. It is a figure which shows a block configuration same as the above. It is a figure which shows the relationship between a sensor voltage same as the above and lighting power. It is a figure which shows the block configuration of the conventional illumination control apparatus. (A)-(c) It is a figure which shows the brightness feedback control upper limit which correct | amends luminous flux decline same as the above.

DESCRIPTION OF SYMBOLS 1 Lighting control apparatus 1a Control part 1b Illuminance sensor 1c Memory | storage part 1d Light source 1e Lighting circuit 1h Calculation part

Claims (5)

A light source that is lit by being supplied with lighting power, an illuminance sensor that measures the illuminance of the irradiated surface illuminated by the light source by reflected light, and a measurement value and lighting power of the illuminance sensor are obtained every predetermined time to obtain A control unit that calculates a calculated value obtained by dividing the measured value by the lighting power, and a storage unit that stores the calculated value for each predetermined time,
The control unit calculates a moving average of the calculated values every predetermined time, sets a target illuminance based on the minimum value of the moving average, and supplies the light source so that the measured value of the illuminance sensor becomes the target illuminance. Feedback control of lighting power ,
When the supply of lighting power is stopped within a predetermined time after the start of the supply of lighting power, the light source light source decays according to the cumulative lighting time without performing the feedback control the next time lighting power supply is started A lighting control device that controls lighting power so as to correct the above .   When the target illuminance is greater than or equal to the measurement upper limit value of the illuminance sensor or less than or equal to the measurement lower limit value of the illuminance sensor, the control unit does not perform the feedback control, and corrects the light flux decline of the light source according to the cumulative lighting time The lighting control device according to claim 1, wherein the lighting power is controlled to do so. The control unit calculates a difference between each moving average and a moving average calculated next to the moving average in an energization period from the start of supply of lighting power to the stop, and the difference within the energization period When the positive / negative sign is biased to a positive or negative ratio or more, the lighting power is adjusted so as to correct the decrease in the luminous flux of the light source according to the cumulative lighting time without performing the feedback control when the lighting power supply is started next time. The illumination control device according to claim 1, wherein the lighting control device is controlled. When the control unit supplies the lower limit value of the lighting power for a predetermined time or longer, the control unit does not perform the feedback control when the supply of the lighting power is started next, and reduces the luminous flux of the light source according to the cumulative lighting time. 4. The lighting control device according to claim 1, wherein the lighting power is controlled so as to be corrected. The control unit sets the target illuminance based on the minimum value of the moving average calculated during the previous energization period and changes the target illuminance from the target illuminance during the previous energization period when the power is turned on to start supplying the lighting power. 5. The target illuminance is increased or decreased step by step each time the power is turned on so that the change of the target illuminance is completed when the power is turned on a plurality of times. Lighting control device.

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