Apparatus for making non-contact angular deflection measurements

摘要

An angular displacement indicating apparatus includes internal and external magnets disposed so that the external magnet tracks the internal magnet when a shaft to which the internal magnet is connected rotates. The external magnet is connected to a rotary variable differential transformer, for example, so that the external magnet moves from a null position in response to rotation of the internal shaft thereby causing the transformer to generate an electrical signal proportional to the angle of rotation of the shaft. Embodiments of the invention include external connecting mechanisms which can be moved to physically indicate the actual angle of deflection of the internal shaft.