Abstract: The invention relates to security alarm devices and can be used for warning about the modification of the position of monitored objects with respect to a user monitoring said objects. The inventive device comprises an object device which is arranged on each guarded object and is used for inquiring and emitting a signal about the presence of a corresponding object device in a monitored area, a control system used for switching on an alarm device and an information display device.

Abstract: The method consists in mounting a first transmitter on a first protected object and a second transmitter on a second protected object and in generating an alarm signal by a user's receiver when one of transmitters moves away therefrom, in additionally introducing a receiver/transmitted, in arranging the user's receiver on the first protected object, in generating an alarm signal by the receiver/transmitted, according to the signal of the first transmitter, when the first protected object provided with the user's receiver moves away therefrom and in generating an alarm signal by the user's receiver according to the signal of the transmitter of the receiver/transmitted, when said receiver/transmitted moves away therefrom. In the inventive system, the user's receiver is mounted on the first protected object and the receiver/transmitted is mounted on the second protected object.

Abstract: The device is designed for warning about relocation of objects under control relative to the controlling user. The engineering effect is achieved through the ability to carry out control and identification of several objects at a time and to generate preliminary warning about possible loss of contact with objects under control. The device uses a pseudo-noise signal and makes it possible to differentiate between signals within the same bandwidth and the same time interval through the form-wise selection. i.e. the device solves the problem of carrier guidance in terms of frequency, virtually eliminating the cross-talk and interference with other radio systems and provides ample opportunities for increase in the number of simultaneously controlled (guarded) objects by means of, for example, modifications in the structure of a pseudo-random sequence for pseudo-noise signal generation.