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Battery-powered light level sensing device

A technology of illuminance sensor and sensing equipment, which is applied in the direction of electric light source, photometry, electroluminescent light source, etc., and can solve complex problems

Inactive Publication Date: 2014-12-10
CP ELECTRONICS LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the relationship between the illuminance in each area of ​​the building and the external ambient illuminance will depend on a range of factors specific to each area, especially if the building has any form of louvres which will limit daylight enter the building
This means that precise control of illuminance in a given room that depends on changes in ambient light levels from the outside is complicated, if not impossible.
In addition, this method requires a lighting control system throughout the building, since the sensors must be installed at a certain distance from the lights to be controlled

Method used

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Embodiment Construction

[0022] Embodiments of the present invention provide battery powered wireless light level sensors. The present invention overcomes the problems of existing lux measurement methods to provide accurate and useful lux information to lighting control systems.

[0023] refer to figure 1 , a sensor device according to an embodiment of the present invention includes an external light intensity (lux) sensor 1 in the form of a photocell. The ambient light sensor 1 is connected to a microcontroller 2 . The microcontroller 2 is also connected to a wireless transmitter 3 configured for wireless communication with the lighting control system of the illuminated space. This microcontroller 2 is also connected to an internal light level (lux) sensor 4, also in the form of a photocell. An infrared transceiver 5 is connected to the microcontroller 2 for programming the microcontroller, and light emitting diodes (LEDs) 6 are provided for user feedback when programming the microcontroller 2 . ...

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Abstract

A battery-powered light level sensing device comprises a light level sensor 1 and a wireless transmitter 3 in data communication with the light level sensor and configured to transmit light level information from the light level sensor to a lighting controller for a room. The sensing device also includes attachment means adapted to attach the sensing device to the glass of a window defining a boundary of the room with the light level sensor positioned to sense the ambient light level outside the room.

Description

technical field [0001] The present invention relates to battery powered light intensity sensing devices. Background technique [0002] Many modern buildings will have some form of dimmable artificial lighting. Typically these will employ a lighting control system to provide a dimming signal, the purpose of which is to dim the lights when there is sufficient ambient light or artificial light entering through the windows of the illuminated space. Conversely, when the ambient light is too dark, the artificial light will be brightened to provide the necessary illumination to the occupants. In addition, for dimming and non-dimming luminaires, the lighting control system can be used to completely turn off the light at a certain ambient light level. [0003] In order to perform these functions, the lighting control system must have some means of measuring ambient light (lux) levels. Several existing methods exist to achieve this goal. The most common method is to place a photoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCY02B20/46H05B37/0218H05B47/11Y02B20/40H05B47/10H05B45/12H05B47/195H05B47/1965G01J1/42G05D25/02G01J1/4204G01J1/44
Inventor 保罗·曼斯梅林·米尔纳
Owner CP ELECTRONICS LTD
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