×

In-place dynamically re-sizeable persistent historical database

  • US 20050240359A1
  • Filed: 06/27/2005
  • Published: 10/27/2005
  • Est. Priority Date: 02/28/2002
  • Status: Active Grant
First Claim
Patent Images

1. In an embedded microcontroller based control system reading field parameters and keeping a historical database of the field parameters in a memory device, a method of storing the historical data comprising:

  • a) grouping a first parameter and a second parameter into a first segment;

    b) writing a data value for the first parameter and a data value for the second parameter to the historical database;

    c) writing a first segment time-stamp associated with both the data values for the first and second parameters;

    d) grouping a third parameter and a fourth parameter into a second segment;

    e) writing a data value for the third parameter and a data value for the fourth parameter to the historical database;

    f) writing a second segment time-stamp associated with both the data values for the third and fourth parameters;

    g) repeating steps b) and c) at a first sample rate; and

    h) repeating steps e) and i) at a second sample rate different than the first sample rate.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×