DIFFERENTIAL SENSITIVE ELEMENT ON SAW WITH SMALL CHANGE OF FREQUENCY AND PHASE CODING
St. Petersburg State University of Aerospace Instrumentation, Department of Aerospace Instruments of orientation, navigation and stabilization; Professor
Abstract. Results of researches of a new method (a method of the coordinated phase coding with small change of frequency) constructions of contactless passive gauges on superficial acoustic waves on the basis of dispersive lines of a delay and phase modulation are resulted. The suboptimum kind of the law of change of the phase, providing high sensitivity to deformation piezoelectric plate is defined. The offered approach provides high noise immunity, accuracy of contactless measurements at the increased radius of action. Physical restrictions on realization of the offered methods are considered.
Keywords: pressure gauges, passive, dispersive lines of a delay.