Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2007-11-20
2007-11-20
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
Reexamination Certificate
active
11312516
ABSTRACT:
Time of flight of sound to, tnpropagating through fixed one face to another of the object under zero load (σo) and changed applied load (σn) respectively are measured, then stress dependent coefficient α peculiar to material of the object can be obtained from above data and the equation determined beforehand α=f(Δtn, σn) using stress dependent coefficient calculation circuit12. Time of flight of sound t propagating through one face to another of the object1at the determined place under applied unknown load is measured next. Time of flight tn, toare measured by time of flight measurement system11. This invention consists of the stress measurement method and the apparatus to calculate real stress caused in the practically equipped object using equation σ=f(Δt, α) determined beforehand based on time of flight t and stress dependent coefficient α mentioned above.
REFERENCES:
patent: 5549001 (1996-08-01), Brokowski et al.
patent: 5549003 (1996-08-01), Drescher-Krasicka
patent: 5-203513 (1993-08-01), None
patent: 2001-041942 (2001-02-01), None
patent: 2001-174344 (2001-06-01), None
English Language Abstract of JP 5-203513.
English Language Abstract of JP 2001-041942.
English Language Abstract of JP 2001-174344.
Bui Bryan
Greenblum & Bernstein P.L.C.
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