Patent ID: 7816613

Claim:
A method for weighing a payload of an excavation site transport vehicle, the vehicle comprising a body, a loading platform, a plurality of wheels, a wheel suspension for supporting each wheel to the body, and the wheel suspension comprises at least one bogie structure including at least two axles connected to one another on either side of the vehicle by means of a horizontal arm, which horizontal arm is in longitudinal direction of the vehicle and is connected to the body by means of a vertical arm, the method comprising: measuring vertical loads exerted on the wheel suspension, at least at three measurement points, each being provided with at least one sensor; conveying measurement data from the sensors to at least one calculating unit of weighing; determining the weight of the load in the calculating unit on the basis of the measurement data obtained from the measurement points and the calculation parameters of the calculating unit; treating the horizontal arm as one measurement point in the calculating unit; measuring the stresses exerted on the horizontal arm with at least two sensors; arranging the sensors on the opposing and substantially vertical side surfaces of the horizontal arm; and calculating a total value of the measurement results obtained from the sensors on the opposing sides of the horizontal arm and using the calculated value as the measurement result, whereby the effect of lateral forces will be eliminated.