ALARM LOCATION DETERMINING SYSTEM Russian patent published in 2017 - IPC G08B25/00 G08B25/12 

FIELD: radio engineering, communication.

SUBSTANCE: messages are transmitted to the base radio station using a radio contact objective radio station and an alarm button. The apparatus comprises an alarm button, which includes a control button connected to the first input of the alarm message shaper, GPS receiver connected to a second input of the alarm messages shaper, and object radio station, fixed radio station configured to receive alarm messages from object station by radio, a personal computer, the input of which is connected to the audio output of fixed radio stations; in structure of alarm button, sequentially introduced, amplifier and acoustical radiator, amplifier input is connected to the output of alarm message shaper, and a power source, connected with all alarm button elements, are included, wherein the acoustical radiator is located in close proximity to the microphone of object radio station; output signal of alarm messages shaper is formed on subcarrier frequency f in the frequency range of 300…3000 Hz, a stationary radio station is tuned to the frequencies F+f or the frequency F-f, where F is object radio station transmission carrier frequency.

EFFECT: increased system efficiency.

2 cl, 1 dwg