CONTACTLESS TRUE DUAL AXIS SHAFT ENCODER Russian patent published in 2017 - IPC G01B7/30 

FIELD: physics, measurement equipment.

SUBSTANCE: invention refers to measurement equipment, namely to the field of contactless measurement of the shaft rotation angle. Contactless true dual axis shaft encoder uses a magnetic system based on a small dipole diametrically magnetized magnet, accomplishing angular movement with two freedom degrees in the working plane parallel to the front surface of the Hall programmable dual axis encoder with integrated magnetic concentrating (IMC) discs, performing magnetic field physical conversion in the working plane into perpendicular, to which the Hall encoder with IMC is truly sensitive, also other types of sensors are used which are highly sensitive only to the magnetic field components on the working (XY) plane and completely or light sensitive to the magnetic field vertical component (Z), and the integral component of the true dual axis encoder can be mounted on either side of the board, and the insert, being the central structural component or element of the housing part, is rigidly connected to the housing and ensures accurate positioning in the stator housing relative to each other, dipole magnet rotor and the integral component of the dual axis magnetosensitive sensor with the optimum working distance between them. Moreover, the shaft encoder uses dipole magnet magnetized parallel to the plane in which the rotor performs working angular movement with two freedom degrees, there is also an integral true dual axis magnetosensitive sensor (encoder) with sine-cosine primary output signals included in the signal processing circuit, and an excess integral sensor that combines two magnetosensitive elements in one integrated housing.

EFFECT: invention provides for an increase in sensitivity, accuracy and reliability of the shaft encoder.

10 cl, 5 dwg