JP2010212232A - Lighting system and lighting control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system which adjusts illuminance in response to a time at night even when installation conditions of the lighting system, such as a season and place, are different. <P>SOLUTION: The lighting system 100 includes a day and night detection part 113 for determining sunset, a counting part 115 for counting an accumulated lighting time of a lighting part from the sunset, and a storage part 114 for storing the accumulated lighting time. When the sunset is determined by the day and night detection part 113, a control part 112 starts power supply from a power supply part 102 to the lighting part 121, reads out the accumulated lighting time stored in the storage part 114, and adjusts the illuminance of the lighting part 121 in response to the accumulated lighting time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an illumination device that performs illumination at night and an illumination control method.

In houses and surrounding roads, lighting devices are installed for the purpose of lighting under human feet, clearly indicating road boundaries, and preventing crime. These lighting devices use a commercial power source, a solar battery, or the like as a power source, and mainly use the brightness of a light emitter such as a fluorescent lamp or a light emitting diode.
Moreover, in these illuminating devices, the illuminating device which lights up at the time of sunset and performs control which suppresses illumination intensity after progress for a fixed time from sunset is known.
For example, Patent Document 1 discloses an illumination device that switches between normal illuminance and low illuminance lower than normal illuminance according to the elapsed time from sunset, and adjusts the illuminance of the illumination unit.

JP 2006-244711 A

However, the illuminating device in Patent Document 1 cannot cope with a change in illumination time that varies depending on the season, that is, night time. In order to adjust the illuminance of the lighting unit, even if the time is set with a timer or the like and the illuminance is set to a low illuminance, the sunset time that is the lighting start time and the sunrise time that is the lighting end time are the season, place It will change depending on. That is, the night time differs depending on the season even in Japan, and the night time differs in Japan and abroad even in the same season.
For example, in the case of summer, if the sunset is 19:00 and the sunrise is 5 o'clock in the next morning, the night time, that is, the lighting time is 10 hours. On the other hand, in winter, for example, if the sunset is 17:00 and the sunrise is 7:00 in the next morning, the lighting time is 14 hours, which is 4 hours longer than the summer.

If the lighting device is a security light, for example, if the time for changing the illumination device's illuminance from normal illuminance to low illuminance is set to 4 hours after sunset according to the summer, it is still busy in winter. At 21:00, the illuminance decreases and the necessary illuminance cannot be provided.
On the other hand, if the time is set for the above change time, 7 hours after sunset in winter, it will operate at normal illuminance until 2 am in summer, and unnecessary power will be consumed. Not efficient.

Therefore, an object of the present invention is to provide an illumination device that can perform efficient energy-saving illumination and can respond to people's expectations such as a crime prevention light.
It is another object of the present invention to provide an illuminating device that performs illumination with necessary illuminance in a necessary time zone even when conditions such as seasons and places are different and illumination time is different, that is, night time is different.

  An illuminating device of the present invention is an illuminating device that divides a time for performing illumination from sunset to sunrise into n and illuminates at different illuminances for each of the divided times. A power supply device for supplying power; a control unit for adjusting power supply from the power supply device to the illumination unit at each of n divided times; a brightness determination unit for determining sunset and sunrise; and the illumination unit A counting unit that measures the cumulative lighting time from sunset, and a storage unit that stores a history of the cumulative lighting time, and the control unit is configured to calculate the total time from sunset to sunrise divided by n. Among them, the first to (n-1) th time is determined by multiplying the cumulative lighting time read from the storage unit by a certain ratio, and when the sunset is determined by the brightness determination unit, Started supplying power from the power supply to the lighting unit And characterized in that.

The illuminating device of the present invention further includes a first storage unit in which an acquisition pattern of the cumulative lighting time to be acquired set by the user from the storage unit is stored, and the control unit includes the first storage unit from the first storage unit. According to the read acquisition pattern, the history of the cumulative lighting time stored in the storage unit is read, and the first to (n-1) th times are determined based on the history.
Further, in the illumination device according to the aspect of the invention, the control unit reads a history of the cumulative lighting time of the previous day from the storage unit according to the acquisition pattern read from the first storage unit. -1) It is characterized in that the first time is determined.
Further, in the lighting device according to the present invention, the control unit reads a history of accumulated lighting times in a predetermined number of days including the previous day from the storage unit according to the acquisition pattern read from the first storage unit, and averages these values And the first to (n-1) th times are determined.

In the illumination device according to the present invention, the power supply device includes a secondary battery that supplies power to the illumination unit, and a solar battery that supplies charging power to the secondary battery.
Moreover, the illumination device of the present invention is characterized in that the brightness determination unit determines sunset and sunrise based on the output of the solar cell.

  The illumination control method of the present invention is an illumination control method for supplying and adjusting power to an illumination unit, the step of determining sunset and sunrise, the step of measuring the cumulative lighting time from sunset, and the cumulative lighting A step of storing a history of time, a step of starting power supply to the illumination unit when sunset is determined, and a time of performing illumination from sunset to sunrise are divided into n, and each divided time A step of illuminating with different illuminances every time, and the first to (n-1) th time among the total time from sunset to sunrise divided by n is a fixed ratio to the stored cumulative lighting time And determining by multiplying by.

  According to the present invention, the illuminance of the lighting device can be adjusted based on the stored cumulative lighting time history, for example, the cumulative lighting time of the previous day or the average value of the cumulative lighting time of the previous three days. Even if conditions such as seasons and places differ, it is possible to realize an illumination device that performs illumination with a necessary illuminance in a necessary time zone.

It is a block diagram of the illuminating device which concerns on one Embodiment of this invention. It is an operation | movement flowchart of the illuminating device shown in FIG. It is a graph for supplementing the operation | movement of FIG. FIG. 3 is a diagram for supplementing the operation of FIG. 2. It is a block diagram of the illuminating device which concerns on one Embodiment of this invention. 6 is an operation flowchart of the lighting device shown in FIG. 5. It is a graph for supplementing operation | movement of the illuminating device which concerns on one Embodiment of this invention. It is a graph for supplementing operation | movement of the illuminating device which concerns on one Embodiment of this invention. It is an operation | movement flowchart of the illuminating device which concerns on one Embodiment of this invention.

(First embodiment)
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of an illumination device 100 according to an embodiment of the present invention. The lighting device 100 is a device that is installed on, for example, a road, a park, etc., is turned on with sunset, and illuminates the surrounding area.
In FIG. 1, the illumination device 100 includes a power supply device 101, an illumination control unit 111, and an illumination unit 121.
The power supply apparatus 101 includes a power supply unit 102 in FIG. For example, the power supply unit 102 converts electric power supplied from a commercial power supply into a voltage value necessary for the lighting device, and supplies electric power necessary for lighting.

The illumination control unit 111 includes a control unit 112, a day / night detection unit 113 (brightness determination unit), a storage unit 114, and a counting unit 115.
The control unit 112 controls the day / night detection unit 113, the storage unit 114, the counting unit 115, and the drive control unit 122 of the illumination unit 121 to supply power to the illumination unit 121 and adjust the illuminance.
Specifically, the control unit 112 outputs an illumination start signal, an illuminance adjustment signal, and an illumination stop signal to the drive control unit 122 of the illumination unit 121, and performs power supply to the illumination unit 121 and illuminance adjustment.
Further, the control unit 112 outputs a counting start signal to the counting unit 115 to start the lighting time measurement, and outputs a counting stop signal to stop the lighting time measurement.
In addition, the control unit 112 outputs a writing start signal to the storage unit 114 and stores the accumulated lighting time.
The illuminance adjustment performed by the control unit 112 will be described later.

  The day / night detection unit 113 detects daytime / nighttime determination, that is, determination of sunset and sunrise, detects ambient illuminance that is the brightness of the surroundings of the lighting device 100, and determines that the set illuminance is greater than the daytime and less than the set illuminance is nighttime. I do. The determination of sunset and sunrise is performed by detecting the ambient illuminance of the lighting device 100 using, for example, an illuminance sensor. The day / night detection unit 113 detects sunset and sunrise, and outputs a day / night detection signal (sunset detection signal, sunrise detection signal) to the control unit 112.

In addition, the counting unit 115 responds to the counting start signal input from the control unit 112, and calculates the time after the day / night detection unit 113 determines that it is night, that is, sunset, that is, the total lighting time Tm of the illumination night, as a timer. Measure by Then, after the measurement is started, the counting unit 115 stops the timer in response to the count stop signal input from the control unit 112 when the day / night detection unit 113 determines that it is daytime, that is, sunrise, in the storage unit 114. On the other hand, the total lighting time Tm of the lighting night is output.
The storage unit 114 receives the write start signal from the control unit 112, and thereby stores the total lighting time Tm of the illumination night input from the counting unit 115.

The illumination unit 121 includes a drive control unit 122, an illumination drive unit 123, and an illumination unit 124.
In response to the illumination start signal, the illuminance adjustment signal, and the illumination stop signal input from the control unit 112, the drive control unit 122 starts the supply of power to the illumination unit 124 of the illumination drive unit 123 and adjusts the amount of power to be supplied. Alternatively, the power supply is stopped.
The illumination drive unit 123 supplies the power supplied from the power supply unit 102 to the illumination unit 124 and turns on the illumination unit 124. Moreover, the illumination drive part 123 changes the illumination intensity of the illumination part 124 by adjusting the electric power supply amount, or turns off the illumination part 124 by stopping an electric power supply. Here, for example, an LED (Light Emitting Diode) lamp is applied as the illumination unit 124.

Illuminance adjustment performed by the control unit 112 will be described in detail.
The control part 112 acquires the lighting pattern of the illumination night. The lighting time pattern is a type of lighting time that becomes a base when adjusting the illuminance of the illumination unit according to the lighting time from sunset. The lighting time pattern may be stored in the control unit 112 or may be stored in the storage unit 114. Desirably, it is preferable that the pattern number and the type of lighting time to be acquired are stored in association with each other as shown in FIG. Hereinafter, this storage unit is referred to as a first storage unit. In the present embodiment, the control unit 112 reads the pattern 2 from the first storage unit, and adjusts the illuminance based on the previous day's accumulated lighting time Ty. Note that which pattern the control unit 112 acquires can be set in advance by the user according to conditions such as the installation location when the illumination device 100 is installed.

Moreover, the control part 112 adjusts the illumination intensity of an illumination part with progress of the lighting time from sunset.
For example, among the total lighting time Tm of the night of lighting, the lighting time Ta and the lighting time Tb are 50% and 25%, respectively, of the cumulative lighting time Ty of the previous day, and the illuminance is 100% between the sunset and the lighting time Ta. During the subsequent illumination time Tb, the illuminance can be 75%, and the remaining time until sunrise can be lit at 50%.
Note that the illuminance at the illumination time Tb and the illuminance until the sunrise after the illumination time Tb elapses are 75% and 50% of the illuminance at the illumination time Ta, respectively, but are not limited to this number.

  The control unit 112 reads the lighting time Ta and the lighting time Tb from the storage unit 114 from the previous day's turn-off to the lighting of the current day, and reads the previous day's cumulative lighting time Ty from the lighting unit Ta. Illumination time Tb is calculated, and for example, as shown in FIG. 4B, each lighting time and illuminance can be associated and stored. Hereinafter, this storage unit is referred to as a second storage unit.

Further, whether or not the illumination time Ta and the illumination time Tb have elapsed is detected by the counting unit 115 instead of the control unit 112 if the control unit 112 can quickly output an illuminance adjustment signal to the drive control unit 122. Good.
For example, the counting unit 115 may be configured to promptly notify the control unit 112 of the arrival of the illuminance change time while referring to the second storage unit during lighting time measurement by a timer. Hereinafter, in the present embodiment, the counting unit 115 refers to the second storage unit, and outputs a signal that tells the control unit 112 that the illuminance change time has arrived, an illumination time Ta elapsed signal, and an illumination time Tb elapsed signal. The description will be continued as output.

  Note that the second storage unit may be provided in either the control unit 112 or the counting unit 115, or may be stored in the storage unit 114. Further, the illumination time Ta and the illumination time Tb are set to be equal to 50% and 25% of the cumulative lighting time Ty of the previous day, respectively. However, the present invention is not limited to this. For example, the cumulative lighting time Ty of the previous day is 60% and 20%, respectively. It may be the time multiplied by.

  In addition, the ratio of the illuminance adjustment and the ratio of multiplying the previous day's accumulated lighting time Ty are not fixed values as described above, but a separate storage unit is provided, and the control unit refers to the storage unit to adjust the illuminance adjustment. It is good also as a structure which reads the ratio multiplied to a ratio and accumulation lighting time. For example, if the cumulative lighting time Ty of the previous day is within a certain time range, the ratio of multiplying the cumulative lighting time is increased and the ratio of adjusting the illuminance is decreased, and if it is within another range, the ratio of multiplying the cumulative lighting time. May be adjusted so that the ratio of illuminance adjustment is increased.

The operation of the above-described lighting device 100 will be described with reference to FIGS.
FIG. 2 is an operation flowchart of the lighting device 100, and FIGS. 3 and 4 are diagrams for supplementing FIG.
FIG. 3 is a diagram showing the relationship between the lighting time and lighting current of the lighting device 100 in one day, divided into summer and winter, where FIG. 3 (a) is the summer and FIG. 3 (b) is the lighting time in the winter. And the lighting current relationship. In FIG. 3, for example, the summer solstice is shown as the summer, and the winter solstice is shown as the winter.
4 shows the lighting time pattern acquired when the control unit 112 controls the lighting unit 121 as described above, and FIG. 4B shows the relationship between the lighting time and illuminance.

When the lighting device 100 is installed and the power is turned on, initial setting of the storage unit 114 and the like is performed (step 1).
Next, the day / night detection unit 113 detects the ambient illuminance of the lighting device 100 using, for example, an illuminance sensor, and outputs a day / night detection signal (sunset detection signal) to the control unit 112 if it is determined to be sunset. (Step 2).

The control part 112 acquires the lighting time pattern of the illumination part 121 (step 3).
Note that the control unit 112 acquires the default pattern 1 from the first storage unit because there is no cumulative lighting time before the previous day immediately after the installation of the lighting device 100. In such a case, the illumination time Ta and the illumination time Tb are determined based on default values, for example, 8 hours.
Moreover, the control part 112 acquires the pattern 2 from a 1st memory | storage part after the 2nd day. In such a case, the illumination time Ta and the illumination time Tb are determined based on the cumulative lighting time Ty of the previous day. In the present embodiment, for convenience of explanation, the description will be continued on the assumption that the operation is on and after the second day and the pattern 2 is acquired from the first storage unit. In the summer season, the cumulative lighting time T1y of the previous day is 10 hours, and in the winter season, the cumulative lighting time T2y of the previous day is 14 hours.

Here, in order to prevent the control unit 112 from acquiring the pattern 1 after the second day, for example, any signal input to the control unit 112 at the first lighting, for example, a day / night detection signal The control unit 112 may be configured to prohibit the control unit 112 from acquiring the pattern 1 from the first storage unit using the (sunrise detection signal).
In addition, when acquiring pattern 3 and subsequent patterns in FIG. 4A, the control unit 112 uses a default value in pattern 1 such as 8 hours for a predetermined number of days (for example, 3 days in the case of pattern 3). The lighting time Ta and the lighting time Tb for the night are determined. Then, after the predetermined number of days have elapsed, the storage unit 114 stores the history of the cumulative lighting time for the predetermined number of days, so that the control unit 112 can determine the illumination time Ta and the illumination time according to the pattern read from the first storage unit. Tb is calculated and stored in the second storage unit.

  Next, the control unit 112 outputs a measurement start signal to the counting unit 115. In response to this, the counting unit 115 starts a timer and starts counting the total lighting time Tm of the illumination night (step 4). Note that step 3 and step 4 do not need to be provided with a time difference, and either may precede.

In addition, the control unit 112 outputs an illumination start signal to the drive control unit 122. In response to this, the drive control unit 122 starts power supply from the illumination drive unit 123 to the illumination unit 124.
And the illumination drive part 123 supplies electric power, for example, an electric current from the power supply part 102 to the illumination part 124, and makes the illumination part 124 light (step 5).
For example, as shown in FIG. 3, the lighting time is 19:00 in the summer and 17:00 in the winter. In FIG. 3, the current amount at this time, that is, the current amount at the start of lighting is shown as 100% in both summer and winter.

Next, the counting unit 115 outputs an illumination time Ta elapsed signal to the control unit 112 when the lighting time Ta for the night has elapsed (step 6).
Here, as shown in FIG. 3, the lighting time Ta is 5 hours obtained by multiplying 10 hours of the cumulative lighting time T1y of the previous day by 50% in the summer season, and 14 of the cumulative lighting time T2y of the previous day in the winter season. 7 hours multiplied by 50%.
When the illumination time Ta elapsed signal from the counting unit 115 is input, the control unit 112 outputs an illuminance adjustment signal for setting the illuminance of the illumination unit 124 to 75% at the start of lighting to the drive control unit 122.

When the illuminance adjustment signal is input, the drive control unit 122 adjusts the amount of current supplied to the illumination unit 124 of the illumination drive unit 123. And the illumination drive part 123 makes the electric current supply amount to the illumination part 124 75% at the time of lighting start, and reduces the illumination intensity of the illumination part 124 to 75% (step 7).
Note that the illumination driving unit 123 may be configured to change the illuminance of the illumination unit 124 by adjusting the voltage supplied from the power supply unit 102. In such a case, the illumination unit 124 changes the illuminance according to the supplied voltage.
In FIG. 3, this time is midnight in summer and winter, and is the time when lighting time Ta (5 hours in summer and 7 hours in winter) has elapsed since the start of lighting at night.
If the illumination time Ta has not elapsed, the process returns to step 5 and the illumination device 100 continues the state of 100% of the illuminance at the start of lighting.

  Next, when the lighting time of 75% illuminance has passed the lighting time Tb, the counting unit 115 outputs a lighting time Tb elapsed signal to the control unit 112 (step 8). Here, as shown in FIG. 3, the lighting time Tb is 2.5 hours obtained by multiplying 10 hours of the cumulative lighting time T1y of the previous day by 25% in the summer season, and the cumulative lighting time T2y of the previous day in the winter season. It is 3.5 hours multiplied by 25% to 14 hours.

Subsequently, when the illumination time Tb elapsed signal is input from the counting unit 115, the control unit 112 sends an illuminance adjustment signal for setting the illuminance of the illumination unit 124 to 50% of the illuminance at the start of lighting to the drive control unit 122. Output.
When the illuminance adjustment signal is input, the drive control unit 122 adjusts the amount of current supplied to the illumination unit 124 of the illumination drive unit 123. And the illumination drive part 123 makes the electric current supply amount to the illumination part 124 50% at the time of a lighting start, and reduces the illumination intensity of the illumination part 124 to 50% (step 9).
Note that, as described above, the illumination driving unit 123 may be configured to change the illuminance of the illumination unit 124 by adjusting the voltage supplied from the power supply unit 102. In such a case, the illumination unit 124 changes the illuminance according to the supplied voltage.

In FIG. 3, this time is 2:30 in the midnight in the summer, and 3:30 in the midnight in the winter. After the start of lighting, the time when Ta and Tb are added (7.5 hours in the summer, winter In the case of 10.5 hours).
If the illumination time Tb has not elapsed, the process returns to step 7, and the illumination device 100 continues the state of 75% of the illuminance at the start of lighting.

Subsequently, when the day / night detection unit 113 determines that the sunrise occurs, the day / night detection signal (sunrise detection signal) is output to the control unit 112 (step 10). When the day / night detection unit 113 does not determine that the sunrise has occurred, the process returns to step 9 to continue the state of 50% of the illuminance at the start of lighting.
When the day / night detection signal (sunrise detection signal) is input from the day / night detector 113, the controller 112 outputs a count stop signal to the counter 115, and the counter 115 stops the timer in response thereto. (Step 11).
Then, the control unit 112 outputs a writing start signal to the storage unit 114, and the storage unit 114 stores the total lighting time Tm of the illumination night input from the counting unit 115 (step 12).

Further, the control unit 112 outputs an illumination stop signal to the drive control unit 122. In response to this, the drive control unit 122 stops the current supply to the illumination unit 124 of the illumination drive unit 123. And the illumination drive part 123 stops the electric current supply to the illumination part 124, and makes the illumination part 124 light-extinguish (step 13).
In FIG. 3, this time is around 5 o'clock in the summer, and around 7 o'clock in the winter. After starting lighting on the previous night, the summer is about 10 hours (T1), and the winter is about 14 hours (T2). ) Time that has passed.

  On the next day, if the day / night detection unit 113 determines that it is sunset, a day / night detection signal (sunset detection signal) is output to the control unit 112 (step 2), and the operation after step 3 is continued. Also, the illumination time Ta with an illuminance of 100% and the illumination time Tb with an illuminance of 75% are the time obtained by multiplying the above-described Tm (T1 in summer and T2 in winter) by 50% and 25%, respectively.

Thereby, for example, the night time from summer to winter becomes longer and the illumination time becomes longer. However, since the illuminance is adjusted according to the accumulated illumination time of the previous day, the time when the illuminance is 100% is also increased accordingly. Therefore, the illuminance does not decrease during the time zone for bright illumination as described above. In addition, the night time from winter to summer is shortened and the illumination time is shortened, but the time when the illuminance is 100% is shortened accordingly. Therefore, unnecessary power consumption can be reduced, and an energy efficient lighting device can be provided.
In addition, as described above, it is possible to provide an illuminating device that performs illumination with necessary illuminance in a necessary time zone even when conditions such as seasons and places are different and illumination is required, that is, at night.

(Second Embodiment)
FIG. 5 is a configuration diagram of an illumination device 200 according to an embodiment of the present invention.
5, parts corresponding to those in FIG. 1 are denoted by the same reference numerals as in FIG.
Hereinafter, in order to avoid duplication of explanation, points different from FIG. 1 will be described.
A power supply device 101 in the lighting device 200 includes a solar battery 103, a charging unit 104, and a secondary battery 105.

Solar cell 103 receives sunlight to generate electric power, and stores the electromotive force in secondary battery 105 via charging unit 104.
The day / night detection unit 113 detects the electromotive force of the solar cell 103, refers to the set reference voltage, detects the daytime, that is, sunrise when the electromotive voltage is higher than the reference voltage, and detects the detection result as the day / night detection signal (sunrise detection). Signal) to the control unit 112. When the electromotive voltage is lower than the reference voltage, it is detected as night, that is, sunset, and the detection result is output to the control unit 112 as a day / night detection signal (sunset detection signal).

FIG. 6 is an operation flowchart of the lighting apparatus 200.
Below, the point which is different from the illuminating device 100 about the operation | movement of the above-mentioned illuminating device 200 is demonstrated using FIG. In the description, FIGS. 3 and 4 will be referred to as appropriate.
When the day / night detection unit 113 detects that the electromotive voltage of the solar cell 103 is lower than the reference voltage, that is, night, it outputs a day / night detection signal (sunset detection signal) to the control unit 112 (step 2).

Next, the control unit 112 outputs a counting start signal to the counting unit 115, and the counting unit 115 starts a timer in response to this (Step 3). Further, the control unit 112 acquires a lighting time pattern (step 4).
Here, as the lighting time pattern to be acquired, the pattern 3 can be acquired from the first storage unit described above. That is, the illumination time Ta and the illumination time Tb in Step 5 and Step 7 can be determined based on the average value of the lighting times for 3 days until the previous day.

  That is, the control unit 112 determines whether the lighting time for three days from the storage unit 114 to the previous day from the previous day's turn-off to the previous day's lighting, for example, 9.98 hours, 10 hours, and 10.02 hours in the summer. 3 data is read. Then, the average value of the three data is calculated as 10 hours and stored in the storage unit 114. In addition, the control unit 112 calculates the illumination time Ta and the illumination time Tb, and causes the second storage unit described above to store Ta as 5 hours and Tb as 2.5 hours.

  The counting unit 115 outputs, to the control unit 112, a signal that informs the arrival of the illuminance change time, an illumination time Ta elapsed signal, and an illumination time Tb elapsed signal while referring to the second storage unit (steps 6 and 8). . When these are input, the control unit 112 reduces the illuminance of the illumination unit 124 to 75% and 50% via the drive control unit 122 and the illumination drive unit (steps 7 and 9).

When the day / night detection unit 113 determines that the electromotive voltage of the solar cell 103 is higher than the reference voltage and detects sunrise, the day / night detection unit 113 outputs a day / night detection signal (sunrise detection signal) to the control unit 112 (step 10).
Thereafter, under the control of the control unit 112, the counting unit 115 stops the timer (step 11), the storage unit 114 stores the total lighting time Tm of the illumination night (step 12), and the illumination driving unit 123 The unit 124 is turned off (step 13).

  On the next day, if the day / night detection unit 113 determines that it is sunset, a day / night detection signal (sunset detection signal) is output to the control unit 112 (step 2), and the operation after step 3 is continued. Note that the control unit 112 reads the average value for three days including the above-described Tm until the lighting of the day, calculates the average value for three days, and stores it in the storage unit 114. The control unit 112 calculates the illumination time Ta and the illumination time Tb, and stores them in the second storage unit described above.

  As a result, while maintaining the effect of the first embodiment described above, for example, even if there is an irregular weather day in the three days before the lighting day and the lighting time is different from the other two days, The illuminance and lighting time of the day can be determined by the average value. Therefore, it is possible to provide an illumination device that can accurately respond to changes in the weather.

  In the second embodiment described above, the pattern 3 is acquired from the first storage unit as the lighting time pattern to be acquired. However, the pattern 4 is acquired and the average of the lighting times for five days before the lighting day is obtained. Depending on the value, the illuminance and lighting time of the day can also be determined. Further, the lighting time pattern in the first storage unit is not limited to the pattern shown in FIG. 4A, and may be a pattern that takes an average of one week or one month before the lighting day, for example.

(Third embodiment)
The third embodiment of the present invention will be described below. In the second embodiment described above, the power supply amount from the secondary battery 105 constituting the power supply device 101 to the illumination driving unit 123 in the second embodiment described above is the power consumption of the secondary battery 105 on the previous day, and the current day. A lighting coefficient is calculated from the amount of usable power at the start of lighting (a usable storage capacity of the secondary battery), and is variable according to the calculated lighting coefficient.

  Since the storage capacity of the secondary battery 105 depends on the amount of power generated by the solar battery 103 in the daytime on the day of lighting, the storage capacity varies depending on the weather. Therefore, for example, in the winter season, there is a problem in that the storage capacity may be exhausted if the lighting on the day is performed in a state where the storage capacity is low. Further, in the secondary battery 105, when charging is repeated in a state where the voltage is lower than the overdischarge protection voltage, there is a problem that the number of repetitions that can be charged and discharged is reduced and the life is shortened. Therefore, the lighting device according to the third embodiment determines the output capacity (the amount of power supplied to the lighting drive unit 123 configuring the lighting unit 121) on the day of lighting from the stored amount of the secondary battery before output, It is an object to solve the above problems.

  In order to solve the above problem, the control unit 112 includes a terminal voltage measurement unit 201 (storage capacity measurement unit) that measures the storage capacity of the secondary battery 105. In addition, since the relationship between the terminal voltage Vb of the secondary battery 105 and the battery capacity ratio described later can be uniquely determined, the terminal voltage measurement unit 201 measures the terminal voltage Vb of the secondary battery 105 as the storage capacity. To do. The control unit 112 includes a third storage unit (storage capacity storage unit) that stores the terminal voltage value of the secondary battery 105. The terminal voltage Vb stored in the third storage unit on the lighting night is the terminal voltage Vb (m + 1) of the secondary battery 105 immediately before the lighting start on lighting night, that is, the terminal voltage after charging on the lighting day, and the lighting night. This is the terminal voltage Vb (n + 1) after the end of lighting, that is, the terminal voltage after discharge at night of illumination. Further, the terminal voltage Vb stored in the third storage unit before starting lighting on the lighting night is the terminal voltage Vb (m) of the secondary battery 105 immediately before starting lighting on the night before lighting, that is, after charging on the day before lighting. The terminal voltage and the terminal voltage Vb (n) after the end of lighting on the night before illumination, that is, the terminal voltage after discharge on the night before illumination.

  The control unit 112 also includes the terminal voltage Vb (m + 1) of the secondary battery 105 immediately before the start of lighting the night of lighting, the terminal voltage Vb (m) of the secondary battery 105 immediately before the start of lighting of the previous night, and the end of the previous night's lighting. From the terminal voltage Vb (n), a “current battery availability ratio” (first difference) and a “power consumption ratio on the previous night” (second difference), which will be described later, indicate the relationship between the battery capacity ratio and the terminal voltage. An arithmetic unit for calculating based on the relational expression is provided. Therefore, the control unit 112 includes a fourth storage unit that stores a relational expression for obtaining a “battery capacity ratio” to be described later using the terminal voltage Vb of the secondary battery 105 as a variable.

  Furthermore, the control unit 112 has a fifth storage unit for storing a relational expression for obtaining a “lighting coefficient” to be described later, with the ratio of the “battery availability rate of the day” to the “power consumption rate of the previous night” as a variable. Prepare. The control unit 112 includes a power supply control unit 202 that multiplies the lighting coefficient by the output capacity of the secondary battery 105 and supplies the multiplied power supply amount to the illumination driving unit 123. And the control part 112 calculates a lighting coefficient just before the lighting start of the night, controls the power supply control part 202, and controls the power supply amount from the secondary battery 105 to the illumination drive part 123. FIG. For example, when power is supplied to the illumination drive unit 123 at a constant current, the power supply control unit 202 converts supply power as a current value that supplies a value obtained by multiplying the current value by the lighting coefficient. .

Hereinafter, the current supply amount control from the secondary battery 105 to the illumination driving unit 123 performed by the control unit 112 will be described with reference to FIGS. First, with reference to FIG. 7 and FIG. 8, the definitions of the above “battery capacity ratio”, “battery availability rate on the day”, and “power consumption rate on the previous night” and the meaning of “lighting coefficient” will be described. The power supply amount control will be described with reference to FIG.
In the following description, the secondary battery 105 is assumed to be composed of a lead storage battery. However, the secondary battery 105 may be a secondary battery such as a lithium ion battery or a nickel metal hydride battery.

FIG. 7 is a graph showing the relationship between the battery capacity ratio of the lead storage battery and the terminal voltage of the lead storage battery. The control unit 112 in the lighting device uses the terminal voltage Vb (m + 1) measured by the terminal voltage measurement unit 201 and the terminal voltages Vb (m) and Vb (n) stored in the third storage unit as variables. 7 calculates the “battery availability rate on the current day” and the “power consumption rate on the previous night” according to the relational expression indicating the relationship between the battery capacity ratio and the terminal voltage shown in FIG. Here, the battery capacity ratio is the ratio of the battery capacity when the fully charged capacity is 100%. In FIG. 7, the overdischarge protection voltage Vhd and the fully charged terminal voltage are predetermined voltages set in advance according to the characteristics of the secondary battery 105.
Further, for example, in FIG. 7, the terminal voltage Vb (m + 1) is the terminal voltage of the secondary battery 105 immediately before the start of lighting on the night of illumination, and the terminal voltage Vb (m) is the voltage of the secondary battery 105 immediately before the start of lighting on the previous night. The terminal voltage Vb (n) is the terminal voltage of the secondary battery 105 after the end of lighting the previous night.

  That is, in the example shown in FIG. 7, the battery capacity ratio corresponding to the terminal voltage Vb (m + 1) is about 90%, and the secondary battery 105 is about 90% of the fully charged state due to the daytime charging on the lighting day. Until the battery is stored. Further, the battery capacity ratio corresponding to the terminal voltage Vb (m) is about 95%, which indicates that the secondary battery 105 has been charged up to about 95% of the fully charged state by the daytime charge of the previous day. That is, the storage capacity indicates a case where the charging is less than the previous day due to the weather on the lighting day. Further, the battery capacity ratio corresponding to the terminal voltage Vb (n) is about 70%, which indicates that the secondary battery 105 is discharged to about 70% of the fully charged state by lighting the previous night. The control unit 112 performs control so that these battery capacity ratios do not fall below the battery capacity ratio (60% in FIG. 7) corresponding to the overdischarge protection voltage Vhd.

  In FIG. 7, the difference between the terminal voltage after charging or discharging the secondary battery 105 and the overdischarge protection voltage Vhd is a voltage difference for obtaining the usable battery capacity of the secondary battery 105. Further, the battery capacity ratio (90% in FIG. 7) corresponding to the terminal voltage Vb (m + 1) after charging of the secondary battery 105 and the battery capacity ratio (60% in FIG. 7) corresponding to the overdischarge protection voltage Vhd. The ratio of the difference between the battery capacity ratio at full charge (100%) and the battery capacity ratio corresponding to the overdischarge protection voltage Vhd (60% in FIG. It is defined as “A possible battery capacity ratio”.

Further, the battery capacity ratio (95% in FIG. 7) corresponding to the terminal voltage Vb (m) after charging of the secondary battery 105 and the battery capacity ratio (60% in FIG. 7) corresponding to the overdischarge protection voltage Vhd. The ratio of the difference between the battery capacity ratio at full charge (100%) and the battery capacity ratio corresponding to the overdischarge protection voltage Vhd (60% in FIG. 7) is used for the secondary battery 105 “used the previous night. It is defined as “battery capacity ratio”.
Further, the battery capacity ratio (70% in FIG. 7) corresponding to the terminal voltage Vb (n) after discharge of the secondary battery 105 and the battery capacity ratio (60% in FIG. 7) corresponding to the overdischarge protection voltage Vhd. The ratio of the difference between the battery capacity ratio at full charge (100%) and the battery capacity ratio corresponding to the overdischarge protection voltage Vhd (60% in FIG. 7) is expressed as “consumption battery capacity ratio of secondary battery 105”. Is defined.

Then, define "the battery availability rate for the day" as the value obtained by subtracting the "battery capacity ratio" from the "battery capacity ratio that can be used for the night of lighting", and the "power consumption rate for the previous day" It is defined as a value obtained by subtracting “consumed battery capacity ratio” from “used battery capacity ratio”.
For example, in FIG. 7, “the battery availability rate of the day” is (90−60) / (100−60) − (70−60) / (100−60) = 50%. Is (95-60) / (100-60)-(70-60) / (100-60) = 62.5%.

FIG. 8 is a graph showing a relationship between the ratio of the “battery availability rate of the day” to the “power consumption rate of the previous day” and the lighting coefficient C. The control unit 112 in the lighting device determines the output capacity of the secondary battery 105 on the lighting day, using the lighting coefficient C obtained from the relational expression shown in FIG. 8 stored in the fifth storage unit. Specifically, in the case of the above example, the lighting coefficient C on the lighting day is 50% / 62.5% = 0.8. That is, even when the storage capacity is smaller than the previous day due to the weather on the lighting day, the power supply amount to the illumination driving unit 123 at the lighting night can be reduced compared to the previous night, and the power consumption at the lighting night can be reduced.
As described above, if the lighting coefficient C is determined by the relational expression stored in the fifth storage unit using the ratio of the “battery availability rate on that day” to the “power consumption rate on the previous day” as a variable, the charge amount on the lighting day In addition, the amount of power that can be used for the night is calculated according to the amount of power used on the previous day, and the possibility that the storage capacity is exhausted is reduced.

  Further, it is possible to prevent the secondary battery 105 from being turned on in a state where the output voltage is lower than the overdischarge protection voltage. In the above calculation, consider a case where the secondary battery 105 is hardly charged on the day of illumination. In this case, since the terminal voltage Vb (m + 1) becomes substantially equal to the terminal voltage Vb (n) in the above calculation process, the “battery availability rate for the day” is (70-60) / (100-60) − ( 70-60) / (100-60) = 0%, and the lighting coefficient C can approach 0. Therefore, it is possible to suppress a reduction in the life of the storage battery due to repeated charging while the secondary battery 105 is below the overdischarge protection voltage.

Next, operation | movement of an illuminating device is demonstrated using FIG.
FIG. 9 is an operation flowchart of the lighting apparatus according to the present embodiment. 9, parts corresponding to those in FIG. 6 are denoted by the same reference numerals as those in FIG. 6, and description thereof is omitted. In the following, the operation of the illumination device of the present embodiment will be described using FIG. 9 with respect to differences from the operation of the illumination device 200 shown in FIG.

  After the day / night detection unit 113 outputs a day / night detection signal (sunset detection signal) to the control unit 112 (step 2), the control unit 112 controls the terminal voltage measurement unit 201 to control the battery capacity, that is, two. The terminal voltage of the secondary battery 105 is measured. This measured value is the terminal voltage Vb (m + 1) of the secondary battery 105 immediately before the start of lighting in the illumination night. The control unit 112 uses the terminal voltage Vb (m + 1) as a variable, and uses the relational expression indicating the relationship between the battery capacity ratio stored in the fourth storage unit and the terminal voltage, and the battery capacity corresponding to the terminal voltage Vb (m + 1). Calculate the ratio. Further, the battery capacity ratio corresponding to the overdischarge protection voltage Vhd is calculated using the preset overdischarge protection voltage Vhd as a variable. In addition, the control unit 112 reads the terminal voltage Vb (n) after the end of lighting on the previous night stored in the third storage unit, uses the terminal voltage Vb (n) as a variable, and the battery corresponding to the terminal voltage Vb (n). Calculate the capacity ratio.

  And the control part 112 is (battery capacity ratio corresponding to terminal voltage Vb (m + 1)-battery capacity ratio corresponding to overdischarge protection voltage Vhd) / (100%-battery capacity ratio corresponding to overdischarge protection voltage Vhd). To calculate the “battery capacity ratio that can be used in the lighting tonight”. In addition, the control unit 112 is configured such that (battery capacity ratio corresponding to the terminal voltage Vb (n) −battery capacity ratio corresponding to the overdischarge protection voltage Vhd) / (100% −battery capacity ratio corresponding to the overdischarge protection voltage Vhd). To calculate the “consumption battery capacity ratio”. Further, the control unit 112 subtracts the “battery capacity ratio” from the “battery capacity ratio that can be used in the lighting night” to calculate the “current battery availability ratio” (step 31).

Next, the control unit 112 reads the terminal voltage Vb (m) of the secondary battery 105 immediately before the start of lighting on the previous night stored in the third storage unit, and uses the terminal voltage Vb (m) as a variable as a fourth storage. The battery capacity ratio corresponding to the terminal voltage Vb (m) is calculated using a relational expression indicating the relationship between the battery capacity ratio stored in the unit and the terminal voltage.
And the control part 112 is (battery capacity ratio corresponding to terminal voltage Vb (m)-battery capacity ratio corresponding to overdischarge protection voltage Vhd) / (100%-battery capacity ratio corresponding to overdischarge protection voltage Vhd). To calculate the “battery capacity ratio used the previous night”. Further, the control unit 112 subtracts the “battery capacity ratio” from the “battery capacity ratio used the previous night” to calculate the “power consumption ratio of the previous day” (step 32).
Thereafter, the control unit 112 replaces the terminal voltage Vb (m) stored in the third storage unit with the terminal voltage Vb (m + 1), and stores it in the third storage unit.

Next, the control unit 112 calculates a ratio of the “current battery availability rate” obtained above to the “power consumption rate of the previous day”, and the fifth storage unit stores the calculated ratio as a variable. The lighting coefficient C is calculated using the relational expression (step 33).
The control unit 112 also controls the power supply control unit 202 to multiply the lighting coefficient by the output capacity of the secondary battery 105 and supply the multiplied power supply amount to the illumination driving unit 123. Thereby, in the subsequent step 3 and subsequent steps, the power supply amount from the secondary battery 105 to the illumination driving unit 123 becomes a supply amount that is increased or decreased compared to the previous day's power supply amount according to the lighting coefficient C.

  After the storage unit 114 stores the illumination lighting total lighting time Tm input from the counting unit 115 (step 12), the control unit 112 controls the terminal voltage measurement unit 201 to control the battery capacity, that is, the secondary battery. The terminal voltage of 105 is measured (step 34). This measured value is the terminal voltage Vb (n + 1) after the end of lighting on the previous night as seen from the next day, which is used in the calculation of the “consumption battery capacity ratio” in step 31 immediately before the start of lighting on the next day.

  In addition, the control unit 112 replaces the terminal voltage Vb (n) stored in the third storage unit with the terminal voltage Vb (n + 1) and stores it in the third storage unit (step 35). Subsequently, the control unit 112 outputs an illumination stop signal to the drive control unit 122, and the drive control unit 122 stops the current supply to the illumination unit 124 of the illumination drive unit 123 in response to this. And the illumination drive part 123 stops the electric current supply to the illumination part 124, and makes the illumination part 124 light-extinguish (step 13).

  Thus, in the lighting device according to the third embodiment, the battery capacity ratio when the secondary battery 105 is fully charged is 100%, and the battery capacity ratio when the secondary battery 105 is at the overdischarge protection voltage Vhd is hd%. Then, the control unit 112 sets (the battery capacity ratio before the start of illumination on the day of illumination-hd) / (100-hd) as the "battery availability rate on the day" (first difference), The difference between the battery capacity ratio after the end of illumination−hd) / (100−hd) is calculated. In addition, the control unit 112 sets (battery capacity ratio before lighting on the day before lighting−hd) / (100−hd) as “power consumption rate on the previous night” (second difference) and (lighting end on the day before lighting). The difference from the subsequent battery capacity ratio-hd) / (100-hd) is calculated. Then, the control unit 112 illuminates the storage capacity obtained by multiplying the ratio between the first difference and the second difference by the storage capacity before the start of illumination on the day of illumination (the storage capacity measured by the terminal voltage measurement unit 201). Power supply amount to the unit 121.

  Thereby, since the illuminating device in 3rd Embodiment can calculate the usable electric energy of the night according to the charge amount on the lighting day, and the electric energy used on the previous day, the possibility that the storage capacity is exhausted is reduced. can do. Moreover, the lifetime reduction of the storage battery by repeating charging in the state in which the secondary battery 105 is less than the overdischarge protection voltage can be suppressed.

  In the above-described third embodiment, the terminal voltage of the secondary battery 105 is measured and the consumed battery capacity is calculated. However, the voltage supplied to the lighting unit 121 (processing by the lighting coefficient described above) is used. It is also possible to calculate the amount of electric power obtained by multiplying the subsequent battery voltage), the current supply amount to the illumination unit 124, and the illumination time (the illumination times Ta and Tb) and use it as the consumed battery capacity.

  DESCRIPTION OF SYMBOLS 100,200 ... Lighting apparatus, 101 ... Power supply apparatus, 111 ... Illumination control part, 121 ... Illumination part, 102 ... Power supply part, 103 ... Solar cell, 104 ... Charging part, 105 ... Secondary battery, 112 ... Control part, 113 ... day / night detection unit, 114 ... storage unit, 115 ... counting unit, 122 ... drive control unit, 123 ... illumination drive unit, 124 ... illumination unit, Tm ... total lighting time of illumination night, Ty, T1y, T2y ... accumulation of the previous day Lighting time, Ta, Tb ... lighting time, Vb ... terminal voltage, Vhd ... overdischarge protection voltage, 201 ... terminal voltage measuring unit, 202 ... power supply control unit

Claims (10)

An illumination device that divides the time for performing illumination from sunset to sunrise into n, and performs illumination with different illuminance for each divided time,
A lighting section;
A power supply device for supplying power to the illumination unit;
a control unit for adjusting power supply from the power supply device to the illumination unit at each of the n divided times;
A brightness determination unit for determining sunset and sunrise;
A counting unit for measuring a cumulative lighting time from sunset of the illumination unit;
A storage unit that stores a history of the cumulative lighting time,
The control unit multiplies the cumulative lighting time read from the storage unit by a certain ratio from the first to the (n-1) th time among the total time from sunset to sunrise divided into n. When the brightness is determined and the sunset is determined by the brightness determination unit, power supply from the power supply device to the illumination unit is started.   The storage unit further includes a first storage unit that stores an acquisition pattern of a cumulative lighting time to be acquired set by the user from the storage unit, and the control unit responds to the acquisition pattern read from the first storage unit. The lighting device according to claim 1, wherein a history of cumulative lighting time stored in the storage unit is read, and the first to (n−1) th times are determined based on the history.   The control unit reads a history of the cumulative lighting time of the previous day from the storage unit according to the acquisition pattern read from the first storage unit, and determines the first to (n-1) th time. The lighting device according to claim 2.   The control unit reads a history of accumulated lighting times in a predetermined number of days including the previous day from the storage unit according to the acquisition pattern read from the first storage unit, calculates an average value thereof, and calculates from the first The lighting device according to claim 2, wherein the (n-1) th time is determined.   The lighting device according to claim 1, wherein the power supply device includes a secondary battery that supplies power to the lighting unit and a solar battery that supplies charging power to the secondary battery.   The lighting device according to claim 5, wherein the brightness determination unit determines sunset and sunrise based on an output of the solar cell. A lighting control method for supplying and adjusting power to a lighting unit,
Determining sunset and sunrise; and
Measuring the cumulative lighting time since sunset;
Storing a history of the cumulative lighting time;
When sunset is determined, starting to supply power to the lighting unit;
Dividing the time for lighting from sunset to sunrise into n, and illuminating with different illuminance for each divided time;
determining the first to (n-1) th time among the total time from sunset to sunrise divided by n by multiplying the stored cumulative lighting time by a certain ratio;
A lighting control method comprising: A storage capacity measuring unit for measuring a storage capacity of the secondary battery;
A storage capacity storage unit for storing the first storage capacity before the start of illumination of the secondary battery and the second storage capacity after the end of illumination measured by the storage capacity measurement unit;
The control unit includes a first difference between the third storage capacity and the second storage capacity measured by the storage capacity measurement unit before the start of lighting on the lighting day, and the first storage capacity and the second storage capacity. The lighting device according to claim 5, wherein the amount of power supplied to the lighting unit on the lighting day is adjusted based on a second difference from the storage capacity of the lighting device. The first and second storage capacities are storage capacities on the day before lighting,
The said control part makes the electrical storage capacity which multiplied the ratio of the said 1st difference and the said 2nd difference to the said 3rd electrical storage capacity the said electric power supply amount to the said illumination part, It is characterized by the above-mentioned. Item 9. The lighting device according to Item 8.   When the battery capacity ratio at the time of full charge of the secondary battery is 100% and the battery capacity ratio at the time of overdischarge protection voltage of the secondary battery is hd%, the first difference is (lighting on the lighting day) Battery capacity ratio before start-hd) / (100-hd) and (battery capacity ratio after lighting on the day before lighting-hd) / (100-hd), and the second difference is ( It is a difference between the battery capacity ratio before the start of illumination on the day before illumination—hd) / (100−hd) and the battery capacity ratio after the end of illumination on the day before illumination—hd) / (100−hd). The lighting device according to claim 9.

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