JP2016181430A - Illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination system capable of maintaining the illuminance and illumination uniformity ratio of an illumination area illuminated by a plurality of illumination apparatuses.SOLUTION: An illumination system 10 includes a plurality of illumination apparatuses 12, an image sensor 13 and a dimmer 14. The plurality of illumination apparatuses 12 receives a dimming signal and controls an optical output. The image sensor 13 photographs an illumination area 11 illuminated by the plurality of illumination apparatuses 12. The dimmer 14 acquires image data imaged by the image sensor 13, obtains a dimming rate for each of the illumination apparatuses 12 in which an illumination area 11 has a predetermined illumination distribution on the basis of image data and transmits a dimming signal of the obtained dimming rate for each of the illumination apparatuses 12 to the illumination apparatuses 12.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to an illumination system that illuminates an illumination area with a plurality of illumination devices.

  Conventionally, for example, in a stadium, a plurality of lighting devices such as a projector are used, and the competition area is illuminated by the plurality of lighting devices. Moreover, in the illumination for competitions, the lighting device which used LED as the light source has increased from a viewpoint of energy saving.

  In such competition lighting, the illuminance and the illuminance uniformity in the competition area are defined in JIS Z 9110 and the like. For example, in the case of a soccer field, the average illuminance is defined as 500 lx and the uniformity (minimum / average) 0.5 in the official competition.

  However, the illumination device has a factor that changes the brightness due to ambient temperature, deterioration of the light source, contamination of the optical system, and the like. For example, an LED module has a temperature characteristic, and has a property of becoming dark when the ambient temperature is high and bright when the ambient temperature is low. In addition, when the projector is used indoors, the ambient temperature of each equipment differs depending on the installation position and time zone, and as a result, the illuminance and illuminance uniformity of the initially designed competition area may not be maintained. is there.

JP 2014-86159 A

  The problem to be solved by the present invention is to provide an illumination system capable of maintaining the illuminance and illuminance uniformity of an illumination area illuminated by a plurality of illumination devices.

  The illumination system of the embodiment includes a plurality of illumination devices, an image sensor, and a light control device. The plurality of lighting devices receive the dimming signal and control the light output. The image sensor captures an illumination area illuminated by a plurality of illumination devices. The dimming device acquires image data captured by the image sensor, obtains a dimming rate for each lighting device in which the illumination area has a predetermined illuminance distribution based on the image data, and obtains the dimming rate for each obtained lighting device. The dimming signal is transmitted to the lighting device.

  According to the present invention, it can be expected to maintain the illuminance and illuminance uniformity of an illumination area illuminated by a plurality of illumination devices.

It is explanatory drawing of the illumination system which shows one Embodiment. It is a perspective view of the illuminating device of an illumination system same as the above. It is an illuminance distribution figure which shows an example of the illuminance distribution of the illumination area illuminated with an illumination system same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 3.

  As shown in FIG. 1, a lighting system 10 includes a plurality of lighting devices 12 that illuminate a predetermined lighting area 11 such as a competition area of a stadium (for example, a ground area where soccer is performed), and an image sensor that captures the lighting area 11. 13 and a light control device 14 for controlling the light output of the plurality of illumination devices 12 based on image data from the image sensor 13.

  A plurality of lighting devices 12 are communicably connected to the light control device 14 via a communication line 15, and an image sensor 13 is communicably connected via a communication line 16. For communication between the light control device 14 and the plurality of lighting devices 12, for example, a communication protocol in accordance with the DMX standard, and a communication method in accordance with the RDM (Remote Device Management) standard, which is an extended function of the DMX. It may be configured to be capable of bidirectional communication.

  And as shown in FIG. 2, the illuminating device 12 is a light projector. The lighting device 12 includes a main body 21, a power supply unit 22, and an installation base 23 for installing the main body 21 and the power supply unit 22.

  The main body 21 has a case 26 whose front surface is open and a translucent cover 27 that closes the front surface of the case 26. A plurality of light sources 28 are arranged inside the main body 21. Each light source 28 is provided with a reflector 29 that condenses light from the light source 28 and controls light distribution.

  The light source 28 uses a light emitting element 31 such as an LED. The light source 28 is mainly a light source 28 that generates white light, but may be combined with a light source 28 that generates red light or blue-green light in order to improve color reproducibility.

  In addition, the power supply unit 22 includes a power supply unit 33 that supplies power to each light source 28 and lights each light source 28, and a control unit 34 that controls the power supply unit 33. The control unit 34 has a unique address for each lighting device 12, and receives a dimming signal associated with its own address among dimming signals transmitted from the dimming device 14 through the communication line 15. The power supply unit 33 is dimmed to control the light output of the lighting device 12.

  A plurality of lighting devices 12 are installed on the upper part of the support pillar standing on the stadium, the roof of the stadium, and the like, and irradiate the illumination area 11 with light.

  Further, the image sensor 13 is constituted by, for example, a CCD or a CMOS sensor, images the entire illumination area 11, and transmits the captured image data to the light control device 14 through the communication line 16.

  Further, the light control device 14 obtains image data captured by the image sensor 13, and obtains a light control rate for each lighting device 12 in which the illumination area 11 has a predetermined illuminance distribution based on the image data. A dimming signal having a dimming rate for each lighting device 12 is transmitted to each lighting device 12.

  In the light control device 14, data of each lighting device 12, such as the arrangement of each lighting device 12 and the irradiation area of each lighting device 12 in the lighting area 11, is registered in advance.

  For example, as shown in FIG. 3, the dimmer 14 obtains the illuminance distribution of the illumination area 11 from the acquired image data, and obtains the dimming rate for each illuminator 12 based on the illuminance optimization algorithm based on the illuminance distribution. The illuminance optimization algorithm compares the illuminance distribution of the acquired image data with the default illuminance and illuminance uniformity, and if there is a difference, the illuminator and illuminance uniformity of the illumination area 11 are optimized. Calculate the dimming rate every 12 minutes.

  When a dimming signal is transmitted from the dimming device 14 to each lighting device 12, a dimming signal associated with the address of each lighting device 12 is transmitted through the communication line 15.

  Next, the operation of this embodiment will be described.

  In the illumination system 10, the illumination area 11 is illuminated by controlling the dimmer 14 to turn on the plural illuminators 12 at a predetermined dimming rate.

  The illumination area 11 is imaged by the image sensor 13, and the light control device 14 acquires this image data.

  For example, as shown in FIG. 3, the light control device 14 compares the illuminance distribution of the acquired image data with the predetermined illuminance and illuminance uniformity, and if there is a difference, the illuminance and illuminance uniformity of the illumination area 11 are The dimming rate is obtained for each lighting device 12 that is optimal.

  For example, in competition lighting, the illuminance and illuminance uniformity in the competition area are defined in JIS Z 9110, etc., and in a soccer field, the average illuminance is 500 lx and the uniformity (minimum / average) is 0.5. It is prescribed. Therefore, based on the illuminance distribution of the acquired image data, the dimming rate is obtained for each lighting device 12 so as to be optimized to the specified illuminance and illuminance uniformity.

  A dimming signal of the dimming rate is transmitted from the dimming device 14 to the illuminating device 12 for each obtained lighting device 12.

  Each lighting device 12 receives a dimming signal associated with its own address, and controls the light output to the dimming rate of the dimming signal.

  By the way, there are factors that change the brightness due to the ambient temperature of the illumination device 12, the deterioration of the light source, the contamination of the optical system, and the like. For example, the LED of the light emitting element 31 has a temperature characteristic, and has a property of becoming dark when the ambient temperature is high and bright when it is low. In addition, when the lighting device 12 is installed indoors such as a dome, the ambient temperature of each lighting device 12 varies depending on the installation position and time zone. The illuminance uniformity may not be maintained.

  In the illumination system of the present embodiment, the light control device 14 acquires image data of the image sensor 13 that captures the illumination area 11, and based on this image data, the illumination area 11 has a predetermined illuminance distribution. Therefore, the illuminance and the illuminance uniformity of the illumination area 11 illuminated by the plurality of illumination devices 12 are calculated. Can be maintained.

  In addition, a temperature sensor is provided for each lighting device 12 or an installation area of the lighting device 12, and the light control device 14 also acquires temperature data detected by the temperature sensor, while considering the life of the light source 28 of the lighting device 14, The dimming rate for each lighting device 12 may be obtained comprehensively.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting system
11 Lighting area
12 Lighting equipment
13 Image sensor
14 Light control device

Claims (1)

A plurality of lighting devices for receiving the dimming signal and controlling the light output;
An image sensor that captures an illumination area illuminated by the plurality of illumination devices;
Obtaining image data captured by the image sensor, obtaining a dimming rate for each of the lighting devices in which the illumination area has a predetermined illuminance distribution based on the image data, and obtaining the dimming for each of the obtained lighting devices A dimming device for transmitting a rate dimming signal to the lighting device;
An illumination system comprising: