Method and system for estimating payload weight with hydraulic fluid temperature compensation
US9200432B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2014 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Jun 17, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B19/007
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for estimating the weight of a payload in a bucket of a machine is provided. The system includes a lift linkage supporting the bucket and a hydraulic lift cylinder assembly connected to the lift linkage. A pressure sensor is arranged remotely from the lift cylinder assembly. A payload measurement system is configured to monitor pressure data from the pressure sensor, hydraulic fluid temperature data and cylinder extension velocity data. The payload measurement system estimates a weight of the payload in the bucket based on the pressure data as adjusted by an estimate of a pressure drop between the lift cylinder assembly and the pressure sensor, the estimate of the pressure drop being determined based on a mathematical model that has been fitted to empirical data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.