Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
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Engineering & Computer Science
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Computer Networks & Wireless Communication
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Physics & Mathematics
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General Physics & Mathematics
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Radar, Positioning & Navigation
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Remote Sensing
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Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves
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Anordnung fuer Echolotungen unter Wasser mittels piezoelektrischen Kondensators und eines die Signalaussendung bewirkenden, gleichmaessig umlaufenden Unterbrechers
Akustisches, auf dem Doppler-Prinzip beruhendes Verfahren und Vorrichtung zur Messung der relativen Geschwindigkeit zwischen einem Koerper und einem ihn umgebenden Medium
Verfahren und Einrichtung zur Bestimmung der Richtung und/oder der Entfernung von Gegenstaenden nach der Echomethode unter Verwendung von Unterwasserschallgeraeten