AT THE QUESTION OF PIEZOELECTRIC ACOUSTIC PRESSURE TRANSDUCERS DEVELOPMENT TRENDS AND THE METHODS FOR REDUCING THEIR THE TEMPERATURE ERROR

Kikot Viktor Viktorovich, postgraduate student Penza State University (40 Krasnaya street, Penza, Russia), inbox@post.su

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Background. the acoustic pressure measurement during the operation and testing of power plants produced by the acoustic pressure sensors. Temperature transients in these sensors with a powerful and rapidly exposed to temperatures ranging from minus 253 to + 300 °Cleads to a decrease in the accuracy of acoustic pressure measurement due to the increase in the temperature of the acoustic pressure measurement error of up to 60 %. Even with the steady temperature conditions influence the temperature coefficient of the transform coefficient is from 0.4 to 1.1. Improving the accuracy of the sensor with a non-stationary temperature of the working environment, including in its thermal shock influences, it is an important task. The objective of this work is to demonstrate the relevance of research to develop ways to reduce the temperature error and the determination on the basis of patent and technical information, development trends of acoustic pressure piezosensors.
Materials and methods. The patent materials on acoustic and dynamic pressure sensors in the 20 years between 1995 and 2015 using a database full descriptions of inventions of Rospatent (Russia), the United States Patent Office, the European Patent Organization, the World Intellectual Property Organization and their distribution by year of issue are considered.
Results. The results of the development trends of research methods of the temperature error correction of the acoustic and dynamic pressure piezosensors on the basis of patent information are presented. This distribution of patents across countries, the dynamics of patents, aimed at improving the various sensors characteristics, distribution of national patents of the countries, the ratio of national patents and patents obtained by the inventors in other countries, the results of detection of the most significant trends, these patents with the most interesting from the point of view practical implementation of the technical solutions are described.
Conclusions. The results of the analysis of trends confirmed the need and relevance of research scheme-technical ways to reduce the temperature error of the non-stationary temperature of the environment, including in its thermal shock.

pressure sensor, piezoelectric, acoustic, patent, development trends, reducing the temperature error, patents distribution.