DETERMINATION OF THE DYNAMIC CHARACTERISTICS OF PIEZOELECTRIC SENSORS OF DYNAMIC PRESSURES
IN GAS-MEDIUM ON THE SHOCK TUBE OF HIGH PRESSURE 

Filatova Olga Sergeevna, master’s degree student, Penza State University (40 Krasnaya street, Penza, Russia),
E-mail: avitel@mail.ru 

681.586.773 

10.21685/2307-5538-2018-4-7 

Background. The problem of determining the dynamic characteristics of piezoelectric sensors of dynamic pressures in a gas-medium on a high-pressure shock tube is solved. The aim of this work is to develop a direct method for estimating the dynamic characteristics
of piezoelectric sensors by registering the sensor response to gas pressure drops with further software calculation of the amplitude-frequency characteristic and experimentally determining the period and natural frequency of the sensor oscillations.
Materials and methods. To solve this problem, an experimental setup is used, which is based on a high-pressure shock tube that forms single step influences that come to the input of a sensor installed at its end. The calculation of the amplitude-frequency characteristics of the sensor is carried out in a software way based on information about the experimental step response.
Results and conclusions. A method for determining the dynamic characteristics of piezoelectric sensors in air on a highpressure
shock tube is presented. A software calculation of the amplitude-frequency characteristic according to the data on the step response is carried out. The values of the period and the natural frequency of piezoelectric sensors were experimentally determined. The proposed
method allows to reduce the error when measuring dynamic processes. 

piezoelectric sensor, step response of the sensor, dynamic response of the sensor, high-pressure shock tube, amplitude-frequency response of the sensor, natural frequency of the sensor