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1. (WO1980000497) SONAR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000497    International Application No.:    PCT/NL1979/000003
Publication Date: 20.03.1980 International Filing Date: 02.08.1979
G01S 7/52 (2006.01), G01S 7/524 (2006.01), G06F 1/025 (2006.01), G10K 11/34 (2006.01)
Priority Data:
7808635 22.08.1978 NL
Title (EN) SONAR
Abstract: front page image
(EN)An arrangement for generating amplitude-modulated, ultrasonic transmission pulses comprising at least a switching circuit (4) provided with an inductive load (12) for generating the transmission pulses and controlled with a plurality of switching pulses per pulse interval; a memory (2) filled with information about the appropriate pulse width of the switching pulses as required per transmission pulse interval; and a switching-pulse generator (3) for producing switching pulses using the pulse width information and timing signals determining the switching pulse frequency. This arrangement is suitable for sonar applications for the purpose of improving the detection of doppler shifted echo signals.
(FR)Dispositif pour la production d"impulsions de transmissions ultrasoniques a amplitude modulee, comprenant au moins un circuit de commutation (4) possedant une charge inductive (12) pour la generation des impulsions de transmission et controle par une pluralite d"impulsions de commutation par intervalle d"impulsion; une memoire (2) chargee d"informations relatives a la largeur appropriee de des impulsions de commutation telles qu"elles sont necessitees par l"intervalle de l"impulsion de transmission et un generateur d"impulsions de commutation (3) pour produire ces impulsions de commutation utilisant des informations sur la largeur des impulsions et des signaux de reglage determinant la frequence des impulsions de commutation. Ce dispositif convient pour des applications au sonar en vue de l"amelioration des signaux d"echo decales par effet doppler.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)