Abstract: A measurement and control system for controlling system functions as a function of rotational parameters of a rotating device includes a plurality of interval markers distributed around the periphery of the rotating device and fixed relative to the device support. The measurement and control system also includes a plurality of sensors attached to the periphery of the rotating device, fixed relative to the rotating device so as to be in close proximity to the interval markers. Measurements from sensors attached to different locations on the rotating device are combined so as to mitigate variations in angular speed of the device. Measured rotational parameters are used to predict, via linear interpolation, angular positions of the device between those positions measured by the sensors.

Abstract: An inspection system using penetrating radiation wherein pixels corresponding to transmitted radiation which has been attenuated to at least a predetermined level are displayed in a first color. Pixels which correspond to radiation which has been backscattered to a least predetermined level are displayed in a second color, and pixels which correspond to the remainder of the transmitted radiation are displayed in a third color. Additionally, the brightness of the color of each pixel is controlled in dependence on how far above or below the predetermined level the detected transmitted or scattered signal is.