LOAD CELL WITH A MEANS TO COMPENSATE FOR ERRORS DUE TO MISALIGNMENT

摘要

A load cell (1) has a deformable body with upper and lower contact surfaces (3, 4), through which a force is introduced. Support points (5) of the contact surfaces define a line of action (6) of the force. At least one column-shaped portion (7) of the deformable body has a central longitudinal axis (8) and a circumferential surface whose generating line runs parallel to the central longitudinal axis (8). A first determining means (9) installed on the column-shaped portion converts a mechanical deformation into an electronic signal, and a second determining means (10) installed on the column-shaped portion converts a deviation of the central longitudinal axis (8) from the line of action (6) into a representative signal. Each determining means has at least one strain gauge.

主权项

1. A load cell, comprising:
a deformable body with an upper contact surface and a lower contact surface, each contact surface containing a support point, the respective support points defining a line of action for a force introduced by a load-introducing element associated with the respective contact surface, the deformable body also having at least one column-shaped portion between the respective contact surfaces, the column-shaped portion having a central longitudinal axis and a circumferential surface whose generating line runs parallel to the central longitudinal axis; a first determining means installed on the column-shaped portion for converting a mechanical deformation of the deformable body (2) into an electronic signal; and a second determining means installed on the column-shaped portion for converting a deviation of the central longitudinal axis from the line of action into a representative signal, each of the respective determining means comprising at least one strain gauge, the at least one strain gauge of the second determining means installed essentially midway between the respective contact surfaces and aligned at a predetermined acute angle relative to the generating line of the circumference surface so that the signal of the second determining means is zero in the absence of a deviation of the central longitudinal axis from the line of action.