Measuring and testing – Specimen stress or strain – or testing by stress or strain... – In static structures
Patent
1992-06-22
1994-01-18
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
In static structures
342173, G01M 1900
Patent
active
052791653
ABSTRACT:
Disclosed are a method and a device to measure wind-related stresses in a rotating system. It is based on the studies made by the Applicant which have shown that the power given by the motors driving the system rotationally are a function of these stresses. A measurement of the power, or of any quantity characteristic of this power (such as current, cos.phi. pressure, etc.) therefore enables a simple measurement of the wind-related stresses. If we set a limit value of power (or of a characteristic quantity) related to the limit velocity of the wind beyond which the forces to which the system is subjected are excessive, it becomes easy, by way of a comparison, to obtain a condition for the operation of the motors. The disclosure can also be used, in systems carrying out an angle measurement, to make a correction of this measurement.
REFERENCES:
patent: 3984788 (1976-10-01), Peyrat
patent: 4155252 (1979-05-01), Morrill
patent: 5053777 (1991-10-01), Peyrat
Dull, Hans-Jurgen, "New Antenna Drives," Siemens Power Engineering, vol. 6, No. 2, Mar. 1984, pp. 98-101.
Bizot Alain
Peyrat Andre
Myracle Jerry W.
Thomson - CSF
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