METHOD FOR CALIBRATION OF STRAIN GAUGE FINGERS MAINLY FOR MEASURING FORCES ON WORKING BODY OF THREE-POINT MOUNTED TOOL Russian patent published in 2021 - IPC G01L25/00 A01B63/112 

FIELD: agricultural engineering.

SUBSTANCE: invention relates to the field of agricultural engineering, in particular to the field of measuring the load and traction resistance of the working bodies of mounted tillage tools. The method for group calibration of strain gauge fingers mainly for measuring the forces on the working body of a three-point mounted tool includes the placement of strain gauge fingers, the application of a force of a given value and the registration of strain gauge signals. Strain gauge fingers are placed in the eyelets of an intermediate plate equipped with at least three eye bolts. The force of the specified value is sequentially applied to each of the eye bolts and simultaneously the electrical signals of the strain gauges of each of the strain gauges are recorded. The calibration coefficients are determined from the system of static equations obtained for each of the mentioned loads.

EFFECT: reduced labor intensity and increased accuracy of calibration by reducing the required number of repetitions of measurement.

1 cl, 3 dwg