Metrological Characteristics of Self-Oscillating Transducers for Track Control Systems

This is a study of the sensitivity and accuracy characteristics of three of the best known types of self-oscillating displacement transducers with flat screens which serve as contactless supports. The screens are made of different metals: cast iron, 45 and St3 steels, 12Kh18N10T stainless steel, brass, dural, and copper. The results of an experimental study are shown graphically and in tables taking into account the mutual position of the self-oscillating displacement transducers, as well as the operating conditions for these transducers as a function of the coordinates of the screens. It is shown that during operation of self-oscillating displacement transducers there is a hysteresis that increases on going from a diamagnetic to a ferromagnetic screen. Experiments show that the sensitivity of self-oscillating displacement transducers depends on the screen material. The effect of fluctuations in the supply voltage in the grid on the accuracy characteristics of self-oscillating displacement transducers is also studied and confirmed. The results of experimental studies can serve as useful reference data, and in a number of cases are necessary for specialists involved in the design of automated track control in various areas of machine building. Questions relating to the need for supply voltage stabilizers, the choice of screen material, etc., are discussed.