| 摘要 |
<p>The lighting system for a hall containing e.g. four indoor tennis courts permits individual lighting level control for the courts, and also compensates for daylight conditions. Each court has a light level monitor and is each connected by a switch to an average value former common to all four, giving an output signal to a controller. The switches are operated by a monitoring device which senses which courts are switched off or on, and which can operate each individual level controller. The monitoring device also includes a delay device for operating these controllers, and a further section connected to a second average value former, to operate it when all the individual controllers have been switched off. The second average value former is connected to a limiting value transmitter.</p> |
