Electronic monitoring system.

摘要

The invention relates to an electronic monitoring system, in particular for monitoring buildings, for determining the presence of unauthorised persons by means of a microwave transmitting/receiving device (9) for generating a microwave field and for irradiating therewith the area to be monitored. The microwave device (9) also serves to register the microwave signal which is reflected from the monitored region and modulated, when living beings are present in the region, with frequencies which correspond to the life functions of said living beings, and has a first signal processing device (903 to 919). The electronic monitoring system further has a signal processing device (10) for providing an actual signal amount (10.1), a first storage device (2) for storing and emitting at least one specimen signal amount (2.1, 2.3) which describes a normal state of the area to be monitored, that is to say the absence of unauthorised persons, and a comparator unit (11) for comparing with each other the actual signal amount (10.1) provided by the microwave transmitter (9.2) and the at least one specimen signal amount (2.1, 2.3) emitted by the storage device (2), which comparator unit (11) emits an output value amount (11.1) characterising the result of the comparison, the comparator unit (11) being connected to the display device (7).