FIELD: well drilling, possible use for controlling number of revolutions of shaft of turbo-drill via acoustic communication channel.
SUBSTANCE: system contains face indicator of information signals, made in form of modulator shaft with through aperture, positioned in circular Helmholtz resonator with possible combination of their apertures and connected through sleeve to shaft of turbo-drill, which additionally acts as acoustic face emitter, receiver of acoustic signal, amplifier and decoding block. Helmholtz resonator is mounted with possible change of area of apertures combined with modulator-shaft to provide for absorption of energy of acoustic signal at different frequencies.
EFFECT: increased resistance to interference and precision of information transfer.
4 dwg, 1 ex
