Method for anticollision method and apparatus for cranes movable on a common path
US5634565A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Jan 20, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C15/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To prevent a collision between first and second mobiles, such as travelling cranes, on a common movement path, a method implemented in the first mobile entails measuring a first distance between the first mobile and an origin in a fixed system of axes and a second distance between the first and second mobiles. The method comprises the steps of determining a first speed of the first mobile in the system of axes and a second speed of the first mobile relative to the second mobile in order to deduce a third speed of the second mobile in the system of axes, then of estimating a safety margin between the first and second mobiles, then of comparing the safety margin with a threshold to generate a collision risk factor, and finally of deciding on an action at drive motors of the first mobile as a function of the sign of the first, second and third speeds and the collision risk factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.