AKTIVT DETEKSJONSSYSTEM SOM ANVENDER SAMTIDIGE MULTITRANSMISJONER.

摘要

System of detection by echo comprising sources of emission and reception, in particular for the detection of acoustic waves. / p & & p & a circular base 12 has n columns t, t,.. T,.. T of transducers electroacoustic. Each column, such as t corresponds to an emission at the frequency f. a switch 7 makes it possible to pass from the transmission at the reception. The signals receipts are applied to a device for the formation of channels 8. For each channel, such that v (0) the signals are filters to frequencies f, f,.. F, which are applied to circuits for the resetting time, taking into account the geometry of the base and of the direction of the channel. The signals obtained, such as d are applied to a display device 11 providing the distance, the direction and the speed of the targets detected. / p & & p & application to the monitoring in a marine - and by the radar.