Dynamic payload monitor

Details Dynamic payload monitor Dynamic payload monitor

1994-12-20

1996-04-23

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

177 2514, 177139, 177141, G01L 2500, G01G 1940, G01G 1908, G01G 1910

Patent

active

055092934

ABSTRACT:
A method for dynamically measuring and indicating payload weight for a machine having at least one lift cylinder for elevating a payload carrier is provided. The method includes the steps of lifting a load of known mass during calibrating and sensing a calibration lift cylinder velocity during calibration. To determine payload, lift cylinder hydraulic pressure and lift cylinder extension are sensed during a lifting operation of the machine. A first estimate of the payload is determined as a function of the lift cylinder hydraulic pressure and extension. The method further includes the steps of determining an operating lift cylinder velocity during the lifting operation and determining a velocity correction factor as a function of the calibration lift cylinder velocity and the operating lift cylinder velocity. A second estimate of the payload is calculated as a function of the first estimate and the velocity correction factor.

REFERENCES:
patent: 4230196 (1980-10-01), Snead
patent: 4919222 (1990-04-01), Kyrtsos et al.
patent: 5070953 (1991-12-01), Kyrtsos et al.
patent: 5105896 (1992-04-01), Kyrtsos
patent: 5167287 (1992-12-01), Pomies

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