Protection device
US7468594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2007 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | May 25, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/49142
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a safety system for use in protection functions, which system prevents that an error in one control circuit do not result in a function failure by using supervising functions comprising at least two sensors connected to a monitoring unit which receives and processes information about a position of a machine from both sensors and compares the results with stored values and a number of input conditions for the monitoring unit, whereby said sensors comprise means for generating data with respect to a position of a machine movement and said monitoring unit comprises means, which with respect to the result of the comparison is arranged to stop a machine movement if conditions for a stop are fulfilled. The monitoring unit is arranged to compare values from said sensors and when detecting deviating value from either one of sensors detecting a functional error with the sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.