JP5344762B2 - lighting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture capable of carrying out control at a constant hour advantageously on cost by automatically changing lighting control time in accordance with sunshine hours at that area and on that day. <P>SOLUTION: The lighting fixture 10 is provided with a solar cell 12, a storage battery 16 storing power generated by the solar cell 12, a lighting device 13 lighting up by taking out power from the storage battery 16, a control device 15 controlling charging and discharging of the storage battery 16 as well as lighting of the lighting device 13, and an installation area setting part 25 as a means of setting an installation area in the control device 15. Correlation data of a length of the daytime and a sunset time per area are stored beforehand, an output state of the solar cell 12 is detected, an elapse of time from the time when an output reaches a constant value till the time it goes below the same is measured, and lighting control time from lighting to lighting off or lighting control of the lighting device 13 is to be varied on the basis of the measured time and the installation area. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a luminaire that performs illumination with the generated power of a solar cell stored in a storage battery.

  As an example of a conventional lighting fixture, there is one in which a solar battery is provided in a power supply unit, and an LED light source is turned on by power generated by the solar battery (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-50761 (FIG. 1, claim 1)

  In the conventional lighting device disclosed in Patent Document 1, when the voltage of the solar battery is higher than the voltage of the storage battery and the voltage of the storage battery is equal to or lower than the upper limit set value, the storage battery is charged by the solar battery, When the voltage is lower than the set value and the voltage of the storage battery is equal to or higher than the lower limit set value, the lighting device is turned on.

In the conventional lighting apparatus as described above, when applied to a street light, the lighting device is used when the voltage of the solar battery becomes lower than the set value with the sunset and the voltage of the storage battery is higher than the lower limit set value. Illuminated and illuminated. Then, the lighting device is turned off or dimmed after a predetermined lighting control time has elapsed. However, since the sunset time varies depending on the season, the time when the lighting device is turned off or dimmed varies depending on the season. As shown in FIG. 6, in the conventional lighting fixture, when there is sunrise at time t51 and sunset at time t52 in the summer, lighting of the lighting device is started at sunset time t52, and a certain lighting control time is reached. The lighting device is turned off (dimming) at time t53 after the elapse of S51. As shown in FIG. 7, in the conventional lighting apparatus, in the winter season, when the sunrise is a time t54 later than the summer time t51 and the sunset is a time t55 earlier than the summer time t52, the sunset time t55. At this time, the lighting device is turned on, and the lighting device is turned off (dimmed) at time t56 after the elapse of a certain lighting control time S51. That is, in the conventional lighting fixture, a difference in time S52 occurs between the time t53 when the light is turned off (dimming) in summer and the time t56 when light is turned off (dimming) in winter. For example, in Tokyo in 2010, when the lighting control time S51 is set to 6:00 minutes, with the conventional lighting fixture, the time when the latest lighting is performed at time t52 is from June 24 to July 4. The next day is 1:01, and the earliest lighting time at time t55 is 22:28 from November 29 to December 13, between the latest and earliest days. A difference of 2 hours 33 minutes occurs.
Therefore, the conventional lighting fixture cannot be switched off (dimmed) at a predetermined absolute time such as 24:00 (midnight).

  In contrast to the above, there has also been proposed a lighting fixture in which a clock function for measuring the absolute time is incorporated in the control device or separately provided in order to start turning off at a predetermined time. However, in such a conventional lighting fixture, there are additional parts including an integrated circuit (IC) for realizing the clock function, and parts for a deviation correction function for resetting the clock function at the initial time and when a deviation occurs. Necessary to increase the cost. In addition, the illumination control time may be shifted due to the clock function.

  The present invention has been made to solve the above-described problems, and its purpose is to control at a certain time by automatically changing the lighting control time according to the daylight time of the day in the area. An object of the present invention is to provide a lighting apparatus that can be advantageously performed in terms of cost.

  A lighting fixture according to the present invention controls a solar battery, a storage battery that stores power generated by the solar battery, a lighting device that takes out power from the storage battery and lights it, and charge / discharge of the storage battery and lighting of the lighting device. A control device, and means for setting an installation area in the control device, storing in advance correlation data between the day length and the sunset time for each region, detecting the output state of the solar cell, and outputting Measures the time from when the value becomes equal to or greater than a certain value until it becomes equal to or less than the certain value, and based on the measurement time and the installation area, the illumination control time from turning on or off or dimming the lighting device is variable And

In the present invention, the sunshine time of the day is obtained from the value of the output of the solar cell, the absolute time is calculated by the correlation between the sunshine time and the sunset time for each region stored in advance, and the calculated absolute time The illumination control time is variably set according to the above.
Accordingly, in the present invention, the illumination control time is automatically changed according to the daylight hours of the day in the area, so that control at a fixed time can be advantageously performed in terms of cost.

  In the lighting fixture according to the present invention, in the above-described lighting fixture, in the correlation data between the day length and the sunset time for each region, when there are a plurality of sunset times with the same day length, an intermediate sunset time is provided. Register.

  In the present invention, the sunshine hours are substantially reversed during the period from the summer solstice to the winter solstice and from the winter solstice to the summer solstice, for example. Therefore, since the sunset time is different even if the sunshine hours are the same, by registering an intermediate time between the two sunset times as the correlation data, an error in the sunset time can be reduced to set an optimal lighting control time. Can do.

  The lighting fixture which concerns on this invention WHEREIN: The said lighting time is memorize | stored for several days in the said lighting fixture, a season is judged from the long and short tendency with the said measuring time before the day, and the correlation data to refer are determined.

  In the present invention, the sunshine hours are substantially reversed during the period from the summer solstice to the winter solstice and from the winter solstice to the summer solstice, for example. Therefore, the past measurement time such as the previous day, the day before the previous day is stored, the past measurement time and the measurement time of the day are compared, and it is determined which season changes from the long and short trends, and which correlation data By determining whether or not to refer to the sunset time, the optimal illumination control time can be set without error.

According to the lighting fixture of the present invention, the sunshine time of the day is obtained from the output value of the solar cell, and the absolute time is calculated by the correlation between the sunshine time and the sunset time for each region stored in advance. The illumination control time is variably set according to the absolute time.
Thereby, according to the lighting fixture of this invention, the control at a fixed time can be advantageously performed in terms of cost by automatically changing the lighting control time according to the sunshine time of the day in the area. .

The typical side view of the lighting fixture of one Embodiment concerning this invention Block configuration diagram of the lighting apparatus of FIG. The timing chart explaining the setting of the time with the same sunshine time in the lighting fixture of FIG. Timing chart explaining the setting of the season change point in the lighting apparatus of FIG. The flowchart explaining the control action of the lighting fixture of FIG. Timing chart of conventional luminaires with long sunshine hours Timing chart of conventional lighting fixtures with short sunshine hours

Hereinafter, the lighting fixture which concerns on one Embodiment of this invention is demonstrated with reference to drawings.
As shown in FIG. 1, the lighting fixture 10 which is one Embodiment of this invention is arrange | positioned toward the sun not shown in the solar cell 12 at the upper end part of the support | pillar 11 by which a lower end part is embedded in the ground 1, An illumination device 13 is disposed below the solar cell 12. And the control apparatus 15 and the storage battery 16 are accommodated in the power supply box 14 arrange | positioned near the lower end part of 11 of the support | pillar.

  As shown in FIG. 2, the lighting fixture 10 includes a solar cell 12, a lighting device 13, a control device 15, and a storage battery 16. The solar cell 12 is, for example, a thin-film solar cell 12 that is used for both charging and an optical sensor (illuminance sensor). The thin film solar cell 12 has a P-type, N-type or I-type semiconductor thin film junction formed on an insulating substrate, and cells are connected in series on the substrate by pattern formation to obtain a practically necessary voltage. Create a device. A practical thin-film solar cell 12 is printed on a borosilicate glass substrate by sequentially printing an N-type CdS thin film serving as a collector electrode and a window material, a P-type CdTe thin film, a C thin film as a back electrode, and the like. It is a solar cell 12 of a compound thin film that repeatedly forms sintering.

  The illumination device 13 includes a light source 17 and a lighting device 18. When the light source 17 is an LED (light emitting diode), the lighting device 18 incorporates an inverter circuit or the like for converting electric power supplied from the battery into a direct current power source for the LED. The lighting device 18 is connected to the illumination lighting control unit 19 of the control device 15. The control device 15 includes a solar cell power generation amount detection unit 20, a storage battery voltage detection unit 21, a backflow prevention unit 22, a charge control unit 23, an illumination lighting control unit 19, an illumination control time setting unit 24, and an installation area. A setting unit 25 and an arithmetic processing / control unit 26 are provided. The storage battery 16 is, for example, a lithium ion battery or a lead storage battery.

  The solar cell power generation amount detection unit 20 constantly detects the power generation amount of the power generated by the solar cell 12, and gives the detected power generation amount (for example, voltage) to the arithmetic processing / control unit 26. The storage battery voltage detection unit 21 constantly detects the power stored in the storage battery 16 and supplies the power (for example, voltage) to the arithmetic processing / control unit 26. The backflow prevention unit 22 is a diode for preventing a current from flowing back from the storage battery 16 to the solar battery 12. The charging control unit 23 is a switch circuit such as a relay, and a control signal given from the arithmetic processing / control unit 26 when the storage amount of the storage battery 16 obtained from the storage battery voltage detection unit 21 exceeds a predetermined value. Driven to cut off power supply to the storage battery 16. The lighting lighting control unit 19 is a switch circuit such as a relay, and is driven by a control signal given from the arithmetic processing / control unit 26 based on the lighting control time set by the lighting control time setting unit 24 to be a lighting device. 18 is switched on / off and dimming.

The illumination control time setting unit 24 stores the sunshine time and sunset time in a predetermined area, for example, for one year (365 days) as a reference time in the data table. The installation area setting unit 25 is a changeover switch or the like, and the sunshine time and sunset time of the area to be installed are extracted from the stored data of the lighting control time setting unit 24 by switching, and the sunshine of the area to be installed is obtained. The time and sunset time are transferred to the arithmetic processing / control unit 26. The arithmetic processing / control unit 26 incorporates an arithmetic circuit, a timer circuit, etc., and charging control is performed so that the power of the storage battery 16 given from the storage battery voltage detection unit 21 exceeds a predetermined value and the storage battery 16 is not overcharged. The unit 23 is driven. The arithmetic processing / control unit 26 starts the timer count with sunrise when the power generation amount of the solar cell 12 becomes equal to or higher than a certain value, and counts the timer when the power generation amount of the solar cell 12 becomes lower than the predetermined value with the sunset as a timer. And set the daylight hours for the day. Then, the arithmetic processing / control unit 26 calculates the absolute time based on the correlation between the sunshine time and the sunset time for each region stored in advance, and operates the illumination lighting control unit 19 according to the calculated absolute time. To variably set the illumination control time.
The data table may not be data for 365 days (daily) as data for one year, but may be data for several days.

  As shown in FIG. 3, for example, in autumn day A, when sunrise occurs at time t11 and sunset occurs at time t12, the day becomes the sunshine time T11 from time t11 to time t12. On the other hand, for example, on day B in the spring season, when there is a sunrise at time t13 later than autumn and sunset occurs at time t14 later than autumn, the day becomes the sunshine time T12 from time t13 to time t14. The time T11 and the sunshine time T12 are the same time. However, since the sunset time t12 of the autumn day A and the sunset time t14 of the spring day B are not the same time, the arithmetic processing / control unit 26 sets the sunset time t12 of the autumn day A and the sunset of the spring day B. A time t15 intermediate to the time t14 is registered as correlation data.

  As shown in FIG. 4, on the day C, when sunrise occurs at time t15 and sunset occurs at time t16, the day becomes the sunshine time T13 from time t15 to time t16. On the day D of the day before the current day C, when sunrise occurs at time t17 and sunset occurs at time t18, the day becomes the sunshine time T14 from time t17 to time t18. If there is a sunrise at time t19 on the day E two days before the current day C and there is a sunset at time t20, the day will be the sunshine time T15 from time t19 to time t20. On the day F three days before the day C, if there is a sunrise at time t21 and there is a sunset at time t22, the day will be the sunshine time T16 from time t21 to time t22. On the day G four days before the day C, if there is a sunrise at time t23 and there is a sunset at time t24, the day will be the sunshine time T17 from time t23 to time t24. As described above, based on the comparison from the day G to the day C 4 days ago, the calculation process is performed on the basis of the sunshine time T17, the sunshine time T16, the sunshine time T15, the sunshine time T14, and the sunshine time T13. The control unit 26 recognizes that the season is a turning point when the season changes from the winter solstice to the summer solstice, and determines which correlation data is used to refer to the sunset time.

  Next, the control operation of the lighting fixture 10 will be described. As shown in FIG. 5, when the control is started and the power generation amount of the solar cell 12 is not equal to or greater than a certain value, it is recognized that it is not sunrise and the standby state is established, and the power generation amount of the solar cell 12 is equal to or greater than a certain value. Then, the timer count is started by recognizing the time as sunrise (S101). After the sunrise is recognized, if the power generation amount of the solar cell 12 is not less than a certain value, it is recognized that it is not sunset and enters a standby state. Recognizing the sunset, the timer count is stopped (S101 → S102). When the sunset is recognized, the illumination lighting control unit 19 is driven by the control signal from the arithmetic processing / control unit 26 to turn on the light source 17 of the illumination device 13 (S102 → S103).

  At this time, the sunshine hours and sunset times of the areas switched by the installation area setting unit 25 are selected and set in the calculation processing / control unit 26, and the calculation processing / control unit 26 is set by the illumination control time setting unit 24. Calculate the difference between the standard time of daylight time and sunset time of the set area for one year (365 days) and the daylight time (measurement time) of the day (S103 → S104), and set the daylight corresponding to the daylight time of the day The time is selected, and the illumination control time from when the selected sunset time is switched to turning off (dimming) is calculated and set (S105 → S106). The lighting is continuously turned on by the illumination lighting control unit 19 until the time for switching to off (dimming) is reached, and when the lighting time is reached, the lighting on / off control unit 19 switches on lighting to off (dimming). (S107 → S108).

  In addition, in the lighting fixture 10, although it switches to light extinction after progress of illumination control time, unlike this, it can also be extinguished after a fixed time progress or after detection of sunrise as a light control state after progress of illumination control time. Furthermore, power consumption can be suppressed by performing dimming lighting within the illumination control time.

In the lighting fixture 10 of one embodiment of the present invention, the sunshine time of the day is obtained from the output value of the solar cell 12, and the absolute time is determined by the correlation between the sunshine time and the sunset time of each region stored in advance. The lighting control time is variably set according to the calculated absolute time.
Therefore, in the lighting fixture 10 of one embodiment of the present invention, the lighting control time is automatically changed according to the daylight hours of the day in the area, so that control at a certain time is advantageously performed in terms of cost. Can do.

  In the lighting device 10 according to the embodiment of the present invention, the sunshine hours are substantially reversed in the period from the summer solstice to the winter solstice and from the winter solstice to the summer solstice, for example. Therefore, since the sunset time is different even if the sunshine hours are the same, by registering an intermediate time between the two sunset times as the correlation data, an error in the sunset time can be reduced to set an optimal lighting control time. Can do.

  In the lighting device 10 according to the embodiment of the present invention, the sunshine hours are substantially reversed in the period from the summer solstice to the winter solstice and from the winter solstice to the summer solstice, for example. Therefore, the past measurement time such as the previous day, the day before the previous day is stored, the past measurement time and the measurement time of the day are compared, and it is determined which season changes from the long and short trends, and which correlation data By determining whether or not to refer to the sunset time, the optimal illumination control time can be set without error.

  In addition, the support | pillar 11, the solar cell 12, the illuminating device 13, the storage battery 16, etc. which were used in the said one embodiment are not limited to what was illustrated, and can be changed suitably.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 12 Solar cell 13 Lighting apparatus 15 Control apparatus 16 Storage battery 25 Installation area setting part (Means to set installation area)

Claims (3)

Solar cells,
A storage battery for storing electric power generated by the solar battery;
A lighting device that takes out power from the storage battery and lights it;
A control device for controlling charging / discharging of the storage battery and lighting of the lighting device;
Means for setting an installation area in the control device;
With
Correlation data between day length and sunset time for each region is stored in advance, the output state of the solar cell is detected, and the time from when the output exceeds a certain value to when it falls below a certain value is measured Then, based on the measurement time and the installation area, a lighting fixture in which the lighting control time during which the lighting device is turned on or off or dimmed is variable.   2. The lighting apparatus according to claim 1, wherein in the correlation data between the day length and the sunset time for each region, when there are a plurality of sunset times with the same day length, an intermediate sunset time is registered.   The lighting apparatus according to claim 1, wherein the measurement time is stored for a plurality of days, the season is determined based on a trend of the measurement time before and on the day, and the correlation data to be referenced is determined.

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