FIELD: possible use for notifying the user about change of position of objects being monitored.
SUBSTANCE: method includes mounting first transmitter on first guarded object and second transmitter on second guarded object, and generation of alarm signal by receiver of user when one of transmitters moves away from it. Transmitter-receiver is additionally installed. User receiver is mounted on first guarded object. On signal from first transmitter transmitter-receiver produces an alarm signal when first guarded object with user receiver moves away from it. On signal from transmitter of transmitter-receiver user receiver generates an alarm signal when transmitter-receiver moves away from it. In the system transmitter-receiver may be mounted on second guarded object.
EFFECT: increased reliability.
2 cl, 2 dwg
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