METHOD FOR COMPENSATING THE ERROR OF A PIEZOELECTRIC SENSOR OF A RAPIDLY
CHANGING PRESSURE FROM THE EFFECTS OF TEMPERATURE AND VIBRATION 

Bastrygin Kirill Igorevich, head of laboratory, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), nik2@niifi.ru

681.586’326’773:53.088

10.21685/2307-5538-2018-1-5

Background. The relevance of this topic is confirmed by the increased requirements for accuracy, reliability, stability of metrological characteristics, resistance to external influences and extended operating conditions of sensor equipment from modern control and management systems for technical and production complex products. The aim of the work is to find and select design solutions to reduce the additional error of the piezoelectric pressure sensor. 
Matterials and methods. The peculiarities of the construction of a piezoelectric sensor for high-speed pressure are described for working in systems for measuring and monitoring com-plex objects. The factors determining the measurement error of the fast-changing pressure are considered. The analysis of the amplitude-frequency characteristic of the sensor is carried out.
Results. Schematic solutions allowing to correct the influence of external factors affecting the sensor and the reliability of the product indication are given.
Conclusions. Based on the results of the study, the structure of the sensor is shown that allows to compensate for the additional error caused by external factors (temperature from 196 to 800 °C and vibrations in the frequency range from 31,5 to 5000 Hz with acceleration up to 4500 m/s2) to 0,5 %

sensor, high-pressure pressure, piezoelectric unit, amplitude-frequency response, error compensation