The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 1996
Filed:
Dec. 20, 1994
Arundhati Karumanchi, Metamora, IL (US);
Caterpillar Inc., Peoria, IL (US);
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.