Factory-calibrated multi-spoke strain sensor system

A sensor system for determining torque, comprising:

• a body, including:
• an outer wall defining an inner opening centered about an axis;
• and
• a plurality of radiating structures disposed in the opening and extending radially from the axis to the outer wall, the radiating structures being spaced circumferentially around the axis by a substantially equal angle;
• and
• a sensor disposed on each of the radiating structures, the sensor configured to generate a signal providing a vector indicating deformations of the corresponding radiating structure caused by both:
• (i) a torque experienced by the body about the axis, and (ii) a secondary torque or force experienced by the body, the sensors being arranged on the radiating structures such that combining the vectors provided by the signals from the sensors substantially eliminates any effect of the secondary torque or force from the measurement of the torque about the axis and provides a measurement of the torque about the axis.

A sensor system for determining torque, comprising:

• a controller including one or more processors and one or more computer-readable storage hardware devices, the controller configured to be electrically coupled to a plurality of sensors arranged on a sensor body including:
• an outer wall defining an inner opening centered about an axis;
• and
• a plurality of radiating structures disposed in the opening and extending radially from the axis to the outer wall, the radiating structures being spaced circumferentially around the axis by a substantially equal angle, a sensor disposed on each of the radiating structures,
• the controller configured to receive a signal generated by each sensor, the signal providing a vector indicating deformations of the corresponding radiating structure caused by:
• (i) a torque experienced by the body about the axis, and (ii) a secondary torque or force experienced by the body, and
• the one or more computer-readable storage hardware devices storing computer-executable instructions that cause the one or more processors to determine a measurement of the torque about the axis by combining the vectors provided by the signals from the sensors, the combination of the vectors substantially eliminating any effect of the secondary torque or force from the measurement of the torque about the axis.