Date and time processing in computers

Details Date and time processing in computers Date and time processing in computers

2005-02-08

2005-02-08

Assouad, Patrick (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

History logging or time stamping

C702S079000, C702S176000, C702S178000, C702S187000, C714S020000, C714S815000, C368S046000, C368S107000, C700S014000, C700S016000, C341S122000, C341S152000

Reexamination Certificate

active

06853957

ABSTRACT:
A process data capture and reporting system captures process data values at sensors. A client computer appends absolute-value time stamps to the values to complete records, which are uploaded to a server. The server writes the records to a persistent database. At a later stage, the server retrieves selected records, and performs a very fast conversion of the time stamps to a calendar format with “granular” values for units such as day, month, or minute. The conversion is performed in an optimised manner with use of look-up tables in memory. This minimises processor overhead, and is thus very advantageous where data volumes are high and/or near real time reporting is required.

REFERENCES:
patent: 5315566 (1994-05-01), Stein
patent: 5933625 (1999-08-01), Sugiyama
Daponte et al., ‘Object-Oriented Design of Measurement Systems’, Jan. 1992, IEEE, pp. 243-248.

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