Patent ID: 8507810

Claim:
A dynamic scale for bulk material comprising: two swivel arms; a sensor disposed with each swivel arm of the two swivel arms to measure a shear stress in each swivel arm of the two swivel arms, the sensor comprising: a hole being oriented generally transverse to a neutral fiber of a bending strain of a swivel arm of the two swivel arms; at least one sensing element disposed in the hole and oriented generally transverse to a longitudinal axis of the hole, the at least one sensing element being able to measure changes in a diameter of the hole resulting from shear stress; and wherein the at least one sensing element is inserted and at angle of approximately ±45° to a direction of a shear stress τ xy of the swivel arm of the two swivel arms; and an acceleration sensor disposed with at least one swivel arm of the two swivel arms to correct a determination of a mass by a current acceleration value.