Excavator limb length and offset angle determination using a laser distance meter
US9995016B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Dec 16, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/3681
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A framework comprises a laser distance meter (LDM), reflector, and excavator comprising a chassis, linkage assembly (LA), boom and stick sensors, implement, and control architecture. The LA comprises a boom and stick defining LA positions. The LDM is configured to generate a DLDM and θINC between the LDM and the reflector at a node, and the control architecture comprises actuator(s) and a controller programmed to execute at successive LA positions an iterative process (comprises generating θB, generating θS, and calculating a height H and a distance D between the node and the LDM based on DLDM and θINC), build a set of H, D measurements and a corresponding set of θB, θS for n LA positions, and execute a linear least squares optimization process based on the H, D set and corresponding set of θB, θS to determine and operate the excavator using LB, LS, θBBias, and θSBias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.