Methods for automatic trigger threshold adjustment
| DWPI Title: Method for adjusting trigger threshold values to compensate quiescent electrical level drift in signal, involves initiating data recording event when qualification width counter exceeds qualification width parameter of channel |
| Abstract: Methods are presented for adjusting trigger threshold values to compensate for drift in the quiescent level of a signal monitored for initiating a data recording event, thereby avoiding false triggering conditions. Initial threshold values are periodically adjusted by re-measuring the quiescent signal level, and adjusting the threshold values by an offset computation based upon the measured quiescent signal level drift. Re-computation of the trigger threshold values can be implemented on time based or counter based criteria. Additionally, a qualification width counter can be utilized to implement a requirement that a trigger threshold criterion be met a given number of times prior to initiating a data recording event, further reducing the possibility of a false triggering situation. |
| Use: Method for adjusting trigger threshold values to compensate quiescent electrical level drift in a signal monitored to initiate a data recording event on a data recording apparatus. |
| Advantage: The method enables adjusting the trigger threshold values and providing the trigger threshold values to track drift in the quiescent level output from an environmental sensor, thus avoiding false triggering of the data recording apparatus. |
| Novelty: The method (300) involves measuring (306) quiescent electrical levels of a signal to obtain measurements. The measurements of the level of the signal are compared (308) to a threshold window for a channel. A qualification width counter is incremented (312) when the measurements of the level of the signal exceed the window. The qualification width counter is decremented when the measurements of the level of the signal do not exceed the window for the channel. A data recording event is initiated (316) when the qualification width counter exceeds a qualification width parameter of the channel. |
| Filed: 12/11/2007 |
| Application Number: US2007954024A |
| Tech ID: SD 10168.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |