Dynamic payload monitor
First Claim
1. An apparatus for dynamically measuring payload weight supported by an implement linkage of a work vehicle, said implement linkage adapted to perform a work cycle including a lift portion, comprising:
- a hydraulic cylinder connected between said vehicle and said implement linkage and being so constructed and adapted to actuate said implement linkage;
pressure sensing means for detecting hydraulic pressure within said hydraulic cylinder and responsively producing a first signal during said lift portion; and
computing means for receiving said first signal, determining an actual pressure differential in response to a difference in pressure within said hydraulic cylinder over a predetermined range of a predetermined operating parameter, and determining said payload weight as a function of said actual pressure differential.
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Accused Products
Abstract
A dynamic payload monitor measures and displays payload weight for a loader vehicle by sensing the hydraulic pressure of a lift arm cylinder. The payload weight is computed by curve fitting the second cylinder pressure to a second order polynomial, calculating a pressure differential, and then performing interpolation or extrapolation with a pair of pressure versus position or time reference parabolas obtained during calibration. The weight computation algorithms used in the dynamic payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least one hydraulic cylinder for modifying the linkage geometry.
57 Citations
10 Claims
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1. An apparatus for dynamically measuring payload weight supported by an implement linkage of a work vehicle, said implement linkage adapted to perform a work cycle including a lift portion, comprising:
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a hydraulic cylinder connected between said vehicle and said implement linkage and being so constructed and adapted to actuate said implement linkage; pressure sensing means for detecting hydraulic pressure within said hydraulic cylinder and responsively producing a first signal during said lift portion; and computing means for receiving said first signal, determining an actual pressure differential in response to a difference in pressure within said hydraulic cylinder over a predetermined range of a predetermined operating parameter, and determining said payload weight as a function of said actual pressure differential. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification