Structure of Contact-Type Torque Sensors
▶ Most commonly used in the field
▶ A sensor that detects the torsion (TORQUE) applied to a rotating shaft using a strain gauge
▶ Torque data obtained by the strain gauge (S/G) is transmitted through a slip ring and brush
▶ Under prolonged use depending on working conditions, contact resistance may occur in the slip ring and brush due to friction, leading to data distortion
▶ Efficient in electromechanical systems with varying speeds where electronic noise is easily generated
▶ Cannot be used in conditions exceeding 4000 rpm
Structure of a Non-Contact Torque Sensor
Types of Coupling
▶ Single-Flex Coupling accommodates only angular misalignment. It acts like a hinge or pivot, and cannot compensate for parallel (offset) misalignment.
▶ Double-Flex Coupling accommodates both angular and parallel misalignment. It can be thought of as two Single-Flex Couplings connected with a short spacer or separated by a certain distance between pivots.
Whether Single-Flex or Double-Flex Couplings can accommodate end float depends on the specific design.
▶ Rigid Coupling, as the name implies, is simply a set of flanges mounted directly onto the shaft, and it does not compensate for or allow any type of misalignment.
Source: CAS Scale Korea (카스스케일코리아), Technical Documentation on Coupling Types.