Method of and apparatus for monitoring or controlling the operation of a boom-type crane or the like
US4185280A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1977 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Dec 28, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/905
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The operation of a boom-type crane or the like is monitored or controlled and, especially, a setpoint signal is generated which represents the total load moment for any given set of crane-operating parameters so that this setpoint signal can be compared with an actual-value signal and the crane operator alerted or crane operation terminated when the actual value of the boom-load moment approaches the maximum permissible value thereof. According to the invention, three storage units are provided, the first storing a value of the crane-boom intrinsic moment as a function of the crane parameters, the second storing a unit-load moment value as a function of the crane parameters and the third storing values of the maximum permissible load moment per unit load. A controller is provided to carry out arithmetic operations on signals from the three storage units and, more particularly, for multiplying the output signals of the second and third storage units and adding to the resulting product a signal representing the value from the first storage unit as a function of the crane-operating parameters. The crane-operation parameters are generally the horizontal and vertical angles of the crane…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.