MODULATION OPTICAL DISTANCE GAUGE WITH PHASE-FREQUENCY SIGNAL CONVERSION

Abstract

Problems. Optical distance meters allow measurements of distances to various probing objects. One of the problems is to provide high-resolution, precision and resolution of light-range finders. Therefore, research and improvement of these parameters is relevant.The purpose of the research. Expanding the limits of measuring distances, accuracy and resolution of the light rangefinder.Implementation method. An algorithm for selecting the modulation frequency and its relationship with the quantization frequencies has been developed, which provides a phase relationship between the periods (and in the final state between the phase relationships) of the modulation and quantization frequencies and the selected phase interval. A single quartz oscillator was used to increase the stability of the luminous flux modulation frequency, the reference frequency and the quantization frequencies of the selected information phase interval. The function of structural adjustment of the electronic scale with change of its weight that allows to increase accuracy and resolution of the meter is entered. The possibility of digital signal processing (integration, determination of the average level, mathematical processing and selection of information on the measured distance) to reduce noise effects, increase the stability of signal parameters and accuracy of its measurement. Keywords: modulation light rangefinder, distance, phase-frequency conversion, quantization frequency, measurement accuracy, resolution.Conclusions. The proposed algorithm for choosing the ratio of frequency modulation and quantization frequencies can improve the accuracy and resolution of distance measurement, due to the possibility of changing the quantization frequency and the weight of the electronic scale. The introduction of digital signal processing and the integration of the dedicated phase-frequency range increases the resistance of the meter to the noise effects of the external environment and the configuration of the object of study on the parameters of the light flux.