THE DEVELOPMENT OF DYNAMOMETRIC GAUGE CONSTRUCTIONS USING FORCE COMPENSATION OF THE ELASTIC SENSING ELEMENT DEFORMATION FROM EXTERNAL LOADS

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.

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