Comparison of Metrological Characteristics of Measuring Transducer of Parameters Frequency-Modulated Signals

To build the architecture of measuring converters of the parameters of frequency-modulated signals, the method of discretization by time of the intervals between consecutive rectangular pulses produced by the primary converter of the rotation speed was chosen, and several devices were developed based on it. Using the methods of probability theory, mathematical statistics and measurement theory, a methodology for processing experimental data of a number of measurements with multiple observations was created. The Monte Carlo method was used to construct a scatter histogram and the distribution laws of the random functions of the experimental data were established. The information technology for processing a number of measurements with multiple observations based on the information approach of measurement theory was developed in order to establish the metrological characteristics of measuring transducers. Uncertainty of measuring transducers for processing the frequency-modulated signals of the speed of rotation of the crankshaft of power units belongs to category A. A method of organizing multi-channel measurements of time intervals, which are formed by a certain stroke of the primary converter and correspond to one complete rotation of the shaft, is proposed. The practical implementation of this method made it possible to significantly reduce the uncertainty of the primary converters of frequency-modulated signals and to build measuring converters with satisfactory metrological characteristics. A methodology for testing measuring transducers has been developed and hardware for its implementation has been selected. Uncertainties of the proposed frequency-modulated signals converters were established by statistical processing of experimental data in the form of series of measurements with multiple observations. The choice of a specific type of device depends on the optimal strategy for measuring the parameters of frequency-modulated signals.