Method for assigning a delay time to electronic delay detonators
US7965490B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2006 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Feb 12, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F1/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the method for assigning a delay time to an electronic delay detonator. The detonator includes a data register (24) into which a desired delay time value, supplied by a controller, is written. Subsequently, over a predetermined time period (t) the contents of the data register (24) is repetitively added to a counter register (26) in which the contents is accumulated. After a division of the counter register contents through the calibration time, the contents of the counter register (26) is subsequently counted down using the same oscillator (18) which has controlled the accumulation process. The invention allows the delay time value supplied by the controller to be exactly adhered with, using an oscillator (18) of low accuracy and without feedback from the detonator (12) to the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.