Force-measuring equipment is widely used in all sectors of the economy, primarily in industry. Force measurement is used to determine loads affecting operation capability of various types of equipment and their components to ensure safe operation as well as during tests and research of the systems and mechanisms. The most effective are devices consisting of an elastic element and a transducer of its deformation into an electric signal. An analysis of known force-measuring devices shows that at a large range of loads the most effective form of the elastic element is the ring. As electric transducers of deformation in similar gauges, capacity, inductive, vibrating-wire and strain gauges are used. The disadvantages of existing devices are slow response, suitability for a narrow range of loads, low contact reliability, non-linearity. There are significant prospects of the circular type sensors development with optoelectronic signal transducers, which allows increasing significantly the efficiency, reliability and accuracy of force measurement. The compensation principle is supposed to be used in the dynamometric gauges where as a control input variable, a value of an elastic element deformation is used. The control algorithm of a compensation scheme of undesirable discrepancies of a control variable is made so that to reduce a deformation value to naught. Due to this fact, operation of a dynamometric gauge based on the principle of force compensation is carried out with a lot of accuracy. The construction of the gauge contains a sensing zerobody, an amplifier, feedback and a measuring device.
Information on the parameters of static atmospheric pressure and total pressure of the incoming air flow is the primary information in the air signal system, which is part of the integrated aircraft control system. This information makes it possible to calculate the altitude and speed of the aircraft for automated and automatic control. Static and total pressures are measured by aerometric parameter sensors, whose technical characteristics largely determine the range and values of the measurement accuracy of the air signal system. Relying on the requirements for aircraft flight safety and in accordance with the existing standards for horizontal and vertical separation, rather stringent requirements are imposed on the accuracy of air pressure measurement. Instrumental errors in measuring static and total air flow pressures with a probability of 0.95 should not exceed 0.02 and 0.05 % of the measurement range. The considered original aerometric pressure sensor based on an optical rule, whose high sensitivity requires minimal deformation of the elastic sensitive element, makes it possible to fulfill these requirements. The non-contact digital information retrieval and the operation of the information system under vacuum conditions significantly increased the efficiency of measurement processes. The paper focuses on an algorithm for calculating the main design parameters of elastic sensitive elements in almost the entire range of their standard sizes taking into account the technical capabilities of the secondary converter. The results of the experiments and experimental studies confirmed the sufficiency of theoretical methods for calculating the parameters of elastic elements for pressure sensors
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