Boots – shoes – and leggings
Patent
1981-09-30
1984-09-04
Krass, Errol A.
Boots, shoes, and leggings
73621, 364507, 364551, G01B 734
Patent
active
044701225
ABSTRACT:
A system is disclosed for automatically correlating the position of a nondestructive test (NDT) probe and the magnitude of a probe produced NDT signal as the probe is moved manually, and independently of any mechanical constraint, over a planar surface of a test workpiece. The probe position is sensed electro-optically by a position-determining subsystem including an LED light source affixed to the probe housing so as to be movable therewith and a scanning assembly on which are mounted spaced apart, scanning light sensors, sensor drive motors and angle encoders. An associated control circuit provided in part by a programmed microcomputer is interfaced with the sensors, drive motors and angle encoders of the scanning assembly such that as the electro-optical sensors scan through the position of the LED light source on the probe, peak sensory signals are produced and the corresponding, instantaneous scan angles are registered by the angle encoders and are fed into the microcomputer which, using triangulation processes, determines the position of the probe in the probed area and produces signals representing the coordinates of such instantaneous probe position. Concurrently therewith, the magnitude of the NDT probe signal is registered, correlated and stored in memory along with the probe position coordinates. A video display subsystem, including display control circuitry, also provided by a programmed microcomputer, receives the position coordinate signals and the correlated NDT signal and processes these signals for display on a cathode ray tube (CRT) so as to present a C-scan video display of the NDT signal magnitude as a function of position on the workpiece in the area traversed by the probe.
REFERENCES:
patent: 3571579 (1971-03-01), Whitehouse et al.
patent: 3913387 (1975-10-01), Sasaki et al.
patent: 3996792 (1976-12-01), Kubota et al.
patent: 4092867 (1978-06-01), Matzuk
patent: 4282577 (1981-08-01), Abend et al.
Krass Errol A.
The Boeing Company
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