| 摘要 |
<p>The invention relates to a monitoring system for industrial installations, composed of transmitting detectors (1) and of one or more central receiving units ensuring a high operating reliability and a high degree of independence. This transmission system is characterised in that the local detectors (1) with independent energy sources are normally idle, with the exception of an internal clock always in operation, and therefore the electronics have a very low power consumption. At predetermined intervals, said clock activates the various parts of the emitting transmitter (1). The information is transmitted at UHF or VHF to one or more fixed concentrators (5) in a redundant manner so as to ensure a high transmission reliability. <IMAGE></p> |
