Method and apparatus for storing an increasing number of sequential real-time samples in a fixed amount of memory
US5481468A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1992 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Aug 4, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In data logging applications, a method and apparatus are disclosed for storing an increasing number of consecutive real-time data points, such as those descriptive of AC (alternating current) power line parameters, in a fixed amount of memory by periodically applying a novel compression technique. The compression technique preserves time relationships in the data while maximizing the level of detail consistent with a limited amount of memory. When the memory is full each data point stored is paired with another data point and one value is calculated that will represent the pair of data points, reducing the necessary memory to half and allowing more data points to be stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.