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A positioning goniometer or goniometric stage is a device used to rotate an object precisely (within a small angular range) about a fixed axis in space. Its appearance is similar to that of a linear stage .
This Royal Navy model is typical of B–T goniometers. The two sets of field coils and the rotating sense coil are visible.. A Bellini–Tosi direction finder (B–T or BTDF) is a type of radio direction finder (RDF), which determines the direction to, or bearing of, a radio transmitter.
A positioning goniometer or goniometric stage is a device that rotates an object precisely about a fixed axis in space. It is similar to a linear stage —however, rather than move linearly relative to its base, the stage platform rotates partially about a fixed axis above the mounting surface of the platform.
This Royal Navy model is typical of B–T goniometers. The two sets of "field coils" and the rotating "sense coil" are visible. A key improvement in the RDF concept was introduced by Ettore Bellini and Alessandro Tosi in 1909 (U.S. Patent 943,960). Their system used two such antennas, typically triangular loops, arranged at right angles.
The most common type of goniometer is the "kappa goniometer", which offers three angles of rotation: the ω angle, which rotates about an axis perpendicular to the beam; the κ angle, about an axis at ~50° to the ω axis; and, finally, the φ angle about the loop/capillary axis. When the κ angle is zero, the ω and φ axes are aligned.
Goniometer may refer to: Goniometer, an instrument that measures angles or allows an object to be rotated to a precise angular position; Positioning goniometer, a device used to rotate an object precisely about a fixed axis in space; Goniometer (audio), a device that displays the amount of stereo in a dual-channel signal
A local positioning system (LPS) is a navigation system that provides location information in all weather, anywhere within the coverage of the network, where there is an unobstructed line of sight to three or more signaling beacons of which the exact position on Earth is known.
Traditional non-image based lab gonioreflectomer with goniometric arms for positioning the light source and detector. Depicts sample and calibration coupon stages on moveable platform. The University of Virginia spherical gantry, an example of a modern image-based gonioreflectometer