JP2012113912A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain control of turning on a light source temporarily each time a person is detected by a human sensitive sensor from the beginning to the end of a period in which the light source can be lighted.SOLUTION: A lighting apparatus 1 includes a power generation unit 21 which generates electric power using solar energy, a storage battery 22 which stores the electric power generated by the power generation unit 21, a human sensitive sensor 33 which detects persons in a predetermined area, and a light source 4. Also, the lighting apparatus 1 includes a lighting control unit 6 which, when a person is detected by the human sensitive sensor 33 in a period while power generation by the power generation unit 21 is halted, temporarily turns on the light source 4 using the electric power stored in the storage battery 22. The lighting control unit 6, in order to maintain control of turning on the light source 4 temporarily each time a person is detected by the human sensitive sensor 33 from the beginning to the end of a current possible period for lighting, adjusts at least one of a lighting time and a dimming rate per lighting when a person is detected by the human sensitive sensor 33 according to the detection result of the human sensitive sensor 33 in the past possible period for lighting.

Description

  The present invention relates to a lighting device that turns on a light source with electric power generated using solar energy.

  2. Description of the Related Art Conventionally, an illumination device that turns on a light source with electric power generated using sunlight is known (see, for example, Patent Document 1). The lighting device as described above stores the power generated by the solar battery in the daytime in the storage battery, and turns on the light source using the power stored in the storage battery at night.

  The illumination device described in Patent Literature 1 includes a human sensor that detects a person, turns on a light source when a human is detected by the human sensor at night, and is constant from the time when the human is detected by the human sensor. The light source is turned off when time passes.

JP-A-6-181003

  However, in the conventional illumination device described in Patent Document 1, when a person is detected at night by a human sensor, the light source is always turned on with a fixed lighting time and dimming rate. The power consumption of the light source changes according to the number of times. As a result, in the conventional lighting device, when the number of detections of the human sensor increases, the remaining amount of the storage battery disappears in the middle, and the control of temporarily turning on the light source according to the detection result of the human sensor can be maintained. There was a problem that it was impossible.

  As a technique for solving the above problem, it is conceivable to investigate in advance the amount of human traffic, that is, the number of detections of the human sensor, and use a power generation unit with a power generation capacity suitable for the number of detections and a storage battery with a storage capacity for the lighting device. .

  However, even if the lighting device includes a power generation unit and a storage battery suitable for the number of detections investigated in advance, the power generation unit and the storage battery will not be able to cope with a future increase in human traffic.

  The present invention has been made in view of the above points, and an object of the present invention is to temporarily turn on a light source each time a person is detected by a human sensor from the start to the end of a period during which the light source can be turned on. An object of the present invention is to provide an illumination device that can maintain control of lighting.

  The lighting device of the present invention includes a power generation unit that generates power using solar energy, a storage battery that stores power generated by the power generation unit, a human sensor that detects a person in a predetermined area, a light source, A lighting control unit that temporarily turns on the light source when a person is detected by the human sensor during a period in which the power generation of the power generation unit is stopped, the power generation of the power generation unit stops and the lighting A period during which the control unit can turn on the light source using the electric power stored in the storage battery is set as a lighting-enabled period, and the lighting control unit is configured to perform the operation from the start to the end of the current lighting-enabled period. According to the detection result of the human sensor in the past lighting enabled period, the human sensor so as to maintain the control of temporarily turning on the light source every time a human is detected by the human sensor. When a person is detected And adjusting at least one of the lighting time and the dimming ratio of the per.

  In this lighting device, comprising a remaining amount detection unit for detecting the remaining amount of the storage battery, the lighting control unit using the remaining amount detected by the remaining amount detection unit at the start of the current lighting possible period, Obtaining the amount of power that can be used to turn on the light source in the current turn-on period, and depending on the amount of power that can be used and the detection result of the human sensor in the past turn-on period, It is preferable to adjust the lighting time and the dimming rate.

  In this lighting device, the lighting control unit is detected by the remaining amount detected by the remaining amount detecting unit at the start of the current lighting enabled period and detected by the remaining amount detecting unit at the end of the previous lighting enabled period. It is preferable to obtain the difference from the remaining amount as the usable electric energy.

  In this lighting device, the lighting control unit obtains a difference between the remaining amount detected by the remaining amount detecting unit and a predetermined threshold as the usable electric energy at the start of the current lighting enabled period. Is preferred.

  In this lighting device, the lighting control unit sets the number of detections of the human sensor in the previous lighting-enabled period as a detection result of the human sensor in the previous lighting-enabled period, and uses the number of detections. It is preferable to adjust the lighting time and the dimming rate.

  In this lighting device, the lighting control unit sets a moving average of the number of detections of the human sensor during the predetermined period of lighting in the past as a detection result of the human sensor during the past lighting period, It is preferable to adjust the lighting time and the dimming rate using the moving average.

  According to the present invention, by adjusting at least one of the lighting time per one time and the dimming rate when a person is detected by the human sensor according to the past detection result of the human sensor, The light source can be temporarily turned on with a lighting time and dimming rate suitable for the amount of traffic in the detection area of the sensor. Thereby, in this invention, it can maintain the temporary lighting of the light source when a person is detected by the human sensor from the start time of the lighting possible period to the end time.

It is a block diagram which shows the structure of the illuminating device which concerns on embodiment. It is a figure which shows the relationship between the discharge voltage and the residual amount of the storage battery of the illuminating device which concerns on the same as the above. It is a figure explaining the setting of a threshold value in the illuminating device which concerns on the same as the above. It is an external view of the illuminating device which concerns on the same as the above.

  In the following embodiments, a lighting device that turns on a light source with electric power generated using solar energy will be described.

  As illustrated in FIG. 1, the lighting device 1 according to the present embodiment includes a power generation unit 21 that generates power using solar energy in the daytime and a storage battery 22 that stores power generated by the power generation unit 21. In addition, the lighting device 1 includes a power generation amount detection unit 31 that detects the power generation amount of the power generation unit 21, a remaining amount detection unit 32 that detects the remaining amount of the storage battery 22, and a person who detects a person in a predetermined area. The sensor 33, the light source 4, and the setting part 5 used when an operator performs input operation are provided. Furthermore, the illumination device 1 includes a lighting control unit 6 that controls the lighting state of the light source 4. The lighting device 1 is installed outdoors.

  The power generation unit 21 is a solar cell that converts sunlight into electric power. Examples of solar cells include amorphous solar cells, polycrystalline solar cells, and single crystal solar cells.

  The storage battery 22 is a secondary battery such as a lithium ion battery or a lead battery, and stores the power generated by the power generation unit 21. The storage battery 22 includes a charge / discharge circuit and a protection circuit for charging / discharging.

  The power generation amount detection unit 31 periodically detects the power generation amount of the power generation unit 21 and outputs it to the lighting control unit 6 as the output voltage V1. The power generation amount detection unit 31 includes, for example, a resistor inserted in the current path from the power generation unit 21 to the storage battery 22, and uses the voltage across the resistor as the output voltage V1. Note that the power generation amount detection unit 31 can also be realized by an A / D conversion function built in a microcomputer constituting the lighting control unit 6.

  The remaining amount detection unit 32 uses a microcomputer as a main component, performs A / D conversion by the microcomputer, measures the discharge voltage V2 of the storage battery 22, and monitors the remaining amount of the storage battery 22 using the characteristics shown in FIG. To do.

  The human sensor 33 is, for example, a pyroelectric infrared sensor, and outputs a detection result to the lighting control unit 6 when a person is detected.

  The light source 4 is, for example, an LED, a fluorescent lamp, an incandescent lamp, or the like, and lights up when power is supplied. The light source 4 has not only a function of turning on and off but also a function of dimming and lighting.

  The setting unit 5 includes a plurality of buttons for an operator to perform input operations. Moreover, the setting part 5 may be provided with the display part (not shown) for displaying the numerical value input and operated by the installer.

  The lighting control unit 6 includes a microcomputer on which a CPU (Central Processing Unit) and a memory are mounted as main components. When a person is detected by the human sensor 33 at night and a detection result is acquired from the human sensor 33, the lighting control unit 6 turns on the light source 4 using the electric power stored in the storage battery 22.

  As a method for the lighting control unit 6 to control the lighting state of the light source 4, when the light source 4 is an LED, the lighting control unit 6 controls an impedance component (not shown) connected in series to the light source 4 to control the light source 4. There are a method of adjusting the current flowing through the light source 4 and a method of controlling the on-duty of the pulse by the lighting control unit 6 driving a pulse of a switching element (not shown) connected in series to the light source 4. As the switching element, for example, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is used. In the method for controlling the on-duty, constant current control means for keeping the current constant when it is on is used in combination.

  When the light source 4 is a fluorescent lamp, the lighting control unit 6 adjusts the operating frequency of a resonant inverter circuit (not shown).

  In the present embodiment, the daytime means a time zone in which the power generation unit 21 generates power, that is, a time zone in which the output voltage V1 is equal to or higher than the threshold value Vth, and the light source 4 is turned off regardless of the detection result of the human sensor 33. Refers to the time of day. The nighttime of the present embodiment is a time zone in which power generation of the power generation unit 21 is stopped, that is, a time zone in which the output voltage V1 is less than the threshold value Vth, and when the human sensor 33 detects a person, the lighting control unit 6 It means a time zone in which the light source 4 can be turned on using the power stored in the storage battery 22. The night of this embodiment is a lighting-enabled period.

  Here, a lighting format when a person is detected by the human sensor 33 at night will be described. The lighting control unit 6 can be turned on in the past so as to maintain control of temporarily turning on the light source 4 every time a person is detected by the human sensor 33 from the start to the end of the current lighting-enabled period. In accordance with the detection result of the human sensor 33 during the period, at least one of the lighting time per one time and the dimming rate when a human is detected by the human sensor 33 is adjusted.

  The lighting control unit 6 uses the remaining amount detected by the remaining amount detection unit 32 at the start of the current lighting enabled period to obtain the amount of power that can be used to light the light source 4 during the current lighting enabled period. The lighting control unit 6 that has obtained the usable power amount adjusts the lighting time and the dimming rate according to the usable power amount and the detection result of the human sensor 33 in the past lighting-enabled period.

  The lighting control unit 6 has a lighting time adjustment mode and a dimming rate adjustment mode as modes for adjusting the lighting format when the human sensor 33 detects a person. Hereinafter, a case will be described in which the number of detections of the human sensor 33 in the previous lightable period is the detection result of the human sensor 33 in the past lightable period. That is, the lighting control unit 6 adjusts the lighting time or the dimming rate using the number of times of detection. In addition, when the illuminating device 1 is used for the first time, since the data of the last detection frequency do not exist, the lighting control part 6 uses the estimated detection frequency.

  In the lighting time adjustment mode, the lighting control unit 6 fixes the dimming rate at the time of detection to 100%, for example, and obtains the lighting time at the time of detection. When the power consumption of the light source 4 is P1, the daily charge amount of the storage battery 22 is P2, and the number of nighttime detections is m, the lighting control unit 6 obtains the lighting time at the time of detection by Expression (1). The daily charge amount of the storage battery 22 and the daily power consumption amount of the light source 4 match, and the lighting control unit 6 wants to consume all of the daily charge amount in one day (current lighting possible period). The lighting time can be obtained.

(Charge amount P2)
= (Power consumption P1) × (Number of detections m) × (Dimming rate 1) × (Lighting time) (1)
In addition, when leaving the remaining amount of the storage battery 22 after the next day in preparation for the case where the charge amount of the storage battery 22 decreases due to cloudiness or rain after the next day, the lighting control unit 6 uses the expression (1 ) Is calculated as one half or one third of the calculation result. As a result, one half or one third of the daily charge amount of the storage battery 22 can be consumed in the current lighting enabled period, and the remaining amount of the storage battery 22 can be left for the next lighting enabled period. .

  On the other hand, in the dimming rate adjustment mode, the lighting control unit 6 fixes the lighting time at the time of detection to 1 minute, for example, and obtains the dimming rate at the time of detection. If the power consumption of the light source 4 is P1, the daily charge amount of the storage battery 22 is P2, and the number of nighttime detections is m, the lighting control unit 6 obtains the dimming rate at the time of detection by Equation (2). The daily charge amount of the storage battery 22 and the daily power consumption amount of the light source 4 match, and the lighting control unit 6 wants to consume all of the daily charge amount in one day (current lighting possible period). The dimming rate can be obtained.

(Charge amount P2)
= (Power consumption P1) x (number of detections m) x (lighting time 1 minute) x (light control rate) (2)
In addition, when leaving the remaining amount of the storage battery 22 after the next day in preparation for the case where the charge amount of the storage battery 22 decreases due to cloudiness or rain after the next day, the lighting control unit 6 uses the formula ( Obtained as one-half or one-third of the calculation result of 2). As a result, one half or one third of the daily charge amount of the storage battery 22 can be consumed in the current lighting enabled period, and the remaining amount of the storage battery 22 can be left for the next lighting enabled period. .

  In both the lighting time adjustment mode and the dimming rate adjustment mode, the lighting control unit 6 obtains the power consumption during full lighting (100% lighting) as the power consumption P1. The lighting control unit 6 measures the current supplied to the light source 4 with a current measurement unit 61 (for example, a current transformer), and obtains the power consumption P1 with the calculation unit 62 using the current. The lighting control unit 6 may use a value stored in advance as the power consumption P1.

  Further, the lighting control unit 6 is configured so that, in both the lighting time adjustment mode and the dimming rate adjustment mode, the remaining amount of the storage battery 22 when charging starts in the morning and the storage battery 22 when charging ends at night. By comparing the remaining amount, the daily charge amount P2 of the storage battery 22 is detected and set as a usable power amount. That is, the lighting control unit 6 determines the difference between the remaining amount detected by the remaining amount detecting unit 32 at the start of the current lighting enabled period and the remaining amount detected by the remaining amount detecting unit 32 at the end of the previous lighting enabled period. As the amount of power that can be used.

  Further, the lighting control unit 6 counts and stores the number of detections m of the human sensor 33 in one lighting possible period in both the lighting time adjustment mode and the dimming rate adjustment mode.

  By the way, the lighting control unit 6 is detected by the remaining amount detection unit 32 at the start of the current lighting-enabled period in addition to the mode in which the daily charge amount P2 of the storage battery 22 is used as the usable electric energy as described above. In this mode, a difference between the remaining amount and a predetermined threshold value P3 is obtained as a usable power amount.

  In this mode, as shown in FIG. 3, when the remaining amount of the storage battery 22 at the start of the current lighting-enabled period can be obtained, that is, the remaining amount of the storage battery 22 before the power generation of the power generation unit 21 and the day of the storage battery 22 This is selected when the sum of the charging amount can be obtained. The lighting control unit 6 selects the above mode when it is desired to leave the remaining amount of the storage battery 22 at or above the threshold value P3 in preparation for the case of cloudiness or rain on the following day, and the lighting time at the time of detection according to equation (3). Ask for. In a state where the difference obtained by subtracting the threshold value P3 (remaining amount to be stored in the storage battery 22) from the remaining amount of the storage battery 22 matches the daily power consumption of the light source 4, the lighting control unit 6 determines the lighting time at the time of detection. Can be sought.

(Remaining capacity of storage battery 22 before power generation + amount of charge per day)-(threshold value P3)
= (Power consumption P1) × (Number of detections m) × (Dimming rate 1) × (Lighting time) (3)
When the lighting time at the time of detection is fixed to 1 minute, the lighting control unit 6 can obtain the dimming rate at the time of detection according to the equation (4).

(Remaining capacity of storage battery 22 before power generation + amount of charge per day)-(threshold value P3)
= (Power consumption P1) x (number of detections m) x (lighting time 1 minute) x (light control rate) (4)
Further, the lighting control unit 6 shown in FIG. 1 sets the moving average of the number of detections of the human sensor 33 in the past predetermined number of lighting possible periods as the detection result of the human sensor 33 in the past lighting enabled period, A mode for adjusting the lighting time and the dimming rate using the moving average can be selected.

  In this mode, the lighting control unit 6 obtains an average value of the number of detections by, for example, obtaining a moving average of the number of times of detection in a lighting possible period from a certain number of days before to the previous day, for example, five days ago. In addition, when the illuminating device 1 is used for the first time, since the data of the detection frequency until now does not exist, the lighting control part 6 uses the estimated detection frequency.

  Next, the structure of the illuminating device 1 which concerns on this embodiment is demonstrated using FIG. The power generation unit 21 is installed at the upper end of the pole 71. The pole 71 is, for example, a steel pipe and the lower end is fixed to the installation location. A box 72 and an instrument main body 73 are attached to the side surface of the pole 71. The box 72 is formed of, for example, a steel plate, and stores the storage battery 22, the power generation amount detection unit 31, the remaining amount detection unit 32, the setting unit 5, and the lighting control unit 6. A human sensor 33 and a light source 4 are attached to the instrument body 73. The light emitted from the light source 4 irradiates the lower ground surface. The region irradiated with the light is referred to as an irradiation region 74.

  Next, operation | movement of the illuminating device 1 which concerns on this embodiment is demonstrated using FIG. First, in the daytime period, the power generation unit 21 generates power using sunlight, and the storage battery 22 stores power. Since the surroundings are bright, the lighting control unit 6 keeps the light source 4 off regardless of the detection result of the human sensor 33. Thereafter, when the night time comes, the power generation of the power generation unit 21 stops. The lighting control unit 6 determines that the current time is the night time zone when the output voltage V1 of the power generation amount detection unit 31 is less than the threshold value Vth. At the time of the night time zone, the lighting control unit 6 obtains the amount of power that can be used from the remaining amount of the storage battery 22, and depends on the amount of power that can be used and the past detection results of the human sensor 33. Then, the lighting time per one time and the dimming rate when the person is detected by the human sensor 33 are adjusted. Thereafter, when the human sensor 33 detects a person in the night time zone, the lighting control unit 6 temporarily turns on the light source 4 with the adjusted lighting time and dimming rate. Thereafter, when dawn and morning, the power generation unit 21 starts power generation. The lighting control unit 6 determines that the current time is the daytime period when the output voltage V1 of the power generation amount detection unit 31 is equal to or higher than the threshold value Vth. The lighting device 1 repeats the above-described operation every day.

  As mentioned above, according to the illuminating device 1 of this embodiment, according to the past detection result of the human sensor 33, at least lighting time per one time and the light control rate when a human is detected by the human sensor 33 By adjusting one of the light sources 4, the light source 4 can be temporarily turned on with a lighting time and a dimming rate that match the amount of traffic in the detection area of the human sensor 33. Thereby, in the illuminating device 1 of this embodiment, the temporary lighting of the light source 4 when a person is detected by the human sensor 33 can be maintained from the start to the end of the lighting-enabled period.

  Moreover, according to the illuminating device 1 of this embodiment, it is more reliable by calculating | requiring the electric energy which can be used from the residual amount of the storage battery 22, and adjusting lighting time and a light control rate in the range of the said usable electric energy. In addition, the temporary lighting of the light source 4 can be maintained.

  Furthermore, the illuminating device 1 of the present embodiment uses the difference between the remaining amount of the storage battery 22 at the start of the current turn-on period and the remaining amount of the storage battery 22 at the end of the previous turn-on period as a usable electric energy. Ask. Thereby, according to the illuminating device 1 of this embodiment, the light source 4 can be lighted temporarily in the range of the charge amount with which the storage battery 22 was charged in 1 day.

  On the other hand, in the lighting device 1 of the present embodiment, by switching the mode, the difference between the remaining amount of the storage battery 22 at the start of the current lighting-enabled period and the predetermined threshold value P3 is obtained as the usable electric energy. Therefore, the electric power stored in the storage battery 22 can be left for the next day.

  Moreover, according to the illuminating device 1 of this embodiment, since the nearest detection result can be reflected by using the detection frequency of the human sensor 33 in the last lighting possible period, lighting time and dimming rate Can be obtained with high accuracy.

  On the other hand, the lighting device 1 according to the present embodiment obtains the lighting time and the dimming rate using the moving average of the number of detections of the human sensor 33 in the past predetermined number of lighting possible periods by switching the mode. Can do. Thereby, according to the illuminating device 1 of this embodiment, since the influence of the day of the sudden detection frequency can be made small, lighting time and a light control rate can be calculated | required accurately.

  The lighting control unit 6 does not have both the lighting time adjustment mode and the dimming rate adjustment mode, but may have only one of them.

  The power generation unit 21 may be a device that generates power using solar energy, and may generate power using solar heat instead of sunlight.

DESCRIPTION OF SYMBOLS 1 Illuminating device 21 Power generation part 22 Storage battery 32 Remaining battery detection part 33 Human sensor 4 Light source 6 Lighting control part

Claims (6)

A power generation unit that generates power using solar energy;
A storage battery for storing the power generated by the power generation unit;
A human sensor for detecting a person in a predetermined area;
A light source;
A lighting control unit that temporarily turns on the light source when a person is detected by the human sensor during a period when power generation of the power generation unit is stopped;
The period in which power generation of the power generation unit is stopped and the lighting control unit can turn on the light source using the power stored in the storage battery is set as a lightable period,
The lighting control unit is configured to maintain the control of temporarily turning on the light source every time a person is detected by the human sensor from the start to the end of the current lighting possible period. Illumination characterized by adjusting at least one of a lighting time per one time and a dimming rate when a person is detected by the human sensor according to a detection result of the human sensor during a lighting possible period. apparatus. A remaining amount detecting unit for detecting the remaining amount of the storage battery;
The lighting control unit uses the remaining amount detected by the remaining amount detection unit at the start of the current lighting enabled period, and calculates the amount of power that can be used to light the light source in the current lighting enabled period. The lighting time and the dimming rate are adjusted according to the obtained power amount and the detection result of the human sensor in the past lighting enabled period. Lighting device.   The lighting control unit is configured such that the difference between the remaining amount detected by the remaining amount detecting unit at the start of the current lighting enabled period and the remaining amount detected by the remaining amount detecting unit at the end of the previous lighting enabled period. The lighting device according to claim 2, wherein the amount of power that can be used is calculated.   The lighting control unit obtains a difference between a remaining amount detected by the remaining amount detecting unit and a predetermined threshold as the usable electric energy at the start of the current lighting enabled period. Item 3. The lighting device according to Item 2.   The lighting control unit sets the number of detections of the human sensor during the previous lighting-enabled period as a detection result of the human sensor during the previous lighting-enabled period, and uses the number of detections to determine the lighting time and the lighting time. The lighting device according to claim 1, wherein the dimming rate is adjusted.   The lighting control unit uses a moving average of the number of detections of the human sensor in the past lighting-enabled period of the predetermined number of times as a detection result of the human sensor in the previous lighting-enabled period, and uses the moving average The lighting device according to any one of claims 1 to 4, wherein the lighting time and the dimming rate are adjusted.

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