Method of resonant life cycle comparison inspection by serial number
AssigneeQuasar International
InventorsRobert H Nath, James J Schwarz, Jay G Saxon
Life of this patent
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Abstract
Modal frequencies of known good sample parts (SN) are analyzed to determine a pattern which will identify acceptable material and dimensional variations. The data obtained by analysis is then archived. Production parts are then measured at the modal frequencies and the production parts are accepted or rejected after pattern analysis of each part by comparing the production part with response to the pattern identified as acceptable for material and dimensional variations. Production part data is archived for future testing. This procedure is repeated throughout the lifetime of a part, and may be used on parts which are part of an assembly, including other unmeasured parts.
Claims7
A method for resonant inspection for resonant maintenance comparison comprising the steps of:
- measuring of resonant mode frequencies of at least one known good prototype part upon completion of manufacture of said known good prototype part to obtain known good part empirical resonant modal frequency data;
- comparing resonant mode frequencies of at least one additional production part to the empirical resonant modal frequency data;
- storing in an archival memory comparative data for each additional part by individual identity such as serial number;
- and
- inspecting said at least one additional production part at later production stages or maintenance intervals by comparing its resonant mode frequencies to said comparative archived data for that serial number.
Dependencies are inferred from the claim text.