using ultrasonic, sonic or infrasonic waves

Full Title

Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations > using ultrasonic, sonic or infrasonic waves

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

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

Child Classifications

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• G01S 5/2 Position of source determined by a plurality of spaced direction-finders
• G01S 5/22 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
• G01S 5/24 Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location
• G01S 5/26 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements
• G01S 5/28 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• G01S 5/3 Determining absolute distances from a plurality of spaced points of known location