Wireless alarm system has distributed unit broadband detector receiving pulses from central unit to detect state changes by comparison using schema agreed with central unit

摘要

The system has a central unit(s) and at least one distributed unit that can exchange information contactlessly via transmitters and receivers. The distributed unit has at least one input filter in its receiver. The central unit normally transmits pulses at defined times that are distributed in spectrally broadband manner. The distributed unit receives the pulses with a broadband detector and detects state changes using an agreed schema. The system has at least one central unit and at least one distributed unit, e.g. a motion sensor, which can exchange information contactlessly via transmitters and receivers in each unit. The distributed unit has at least one input filter (F1) in its receiver and a broadband detector (BD1). The central unit normally transmits pulses at defined times that are distributed in spectrally broadband manner. The distributed unit receives the pulse with the broadband detector and detects state changes by comparison using a schema agreed with the central unit.