| 摘要 |
PURPOSE:To detect a movable load accurately by correcting a theoretical thrust which operates on a cylinder in consideration of a force generated by the expansion and contraction of the rod part of a cylinder. CONSTITUTION:The working vehicle is equipped with a mount part such as a bucket part at one end of a movable support part, which elevates the mount part by the expansion and contraction of the rod part of the cylinder. The thrust (theoretical thrust) obtained by subtracting the product of return-side oil pressure and effective pressure reception area of return-side cylinder chamber piston from the product of the oil pressure at a pressurized oil side which operates on a hydraulic cylinder 1 and the piston effective pressure reception area of a cylinder chamber at the pressurized oil side is corrected in consideration of the movable load and acceleration to the mount part and movable support part by the extension and contraction of the rod part of the cylinder 1, thereby detecting the weight of the load from the balance condition based upon the corrected thrust, the geometric shape of the support mechanism of the mount part, the mass of the movable part, the mass of the movable load, and the dynamic frictional force of the movable part.
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