Design of Piezoelectric Gravimeter for Automated Aviation Gravimetric System

Abstract

Abstract:The

Introducing the principle of constructing an aviation gravimetric system with any type of gravimeter

“…The following articles examined separate types of gravimeters: gyroscopic single-channel and dual-channel gravimeters [16], piezoelectric single-channel and dual-channel gravimeters [17,18], string gravimeters [19,20], capacitive single-channel and dual-channel gravimeters [21,22].…”

Analysis of modern gravimeters of the aviation gravimetric system

“…Under the action of the gravity acceleration g, a gravitational force arises, as a result of which the IM moves by an amount x. Such motion of the IM causes compression or stretching of the PE and the appearance of the electric charge Q on its surface (the phenomenon of the direct piezoelectric effect), which is directly proportional to g [26]. In the new piezoelectric gravimetric (PG) of automated AGS, the problem of filtering the output signal is solved by establishing the frequency of the natural oscillations of the PG equal to the frequency of intersection of the spectral densities of the useful signal of gravity acceleration and the signal of the main noise of the vertical acceleration of the aircraft.…”

Methods and Ways of Piezoelectric Accelerometers Fastening on the Objects of Research

“…The piezoelectric measuring converters (PMC) are most often used for measurement of dynamic processes [1], mechanical parameters (efforts, pressure, accelerations, deformations) [2][3][4][5], thermal devices (sensors of thermal streams) [6][7][8], devices to control the structure and concentration of gases [9][10][11]. In many cases, PMC surpass the sensors made on other physical principles in the accuracy and scopes of usage.…”

“…Types of PMC designs, widespread piezoelements, scopes of PMC application and their characteristics are given in the literature [1-17, etc.]. Today one of the most accurate gravimeters aviation gravimetric system is piezoelectric gravimeter [1,5], which contributes to measuring the acceleration of gravity anomalies with a precision close to 0.1 × 10 −5 m/s 2 . Measurement results of the acceleration of gravity obtained with the help of the above mentioned gravimeters contain large measurement errors caused by the influence of various factors: cross-angular velocity of the base and angular velocity of the Earth (584 × 10 −5 m/s 2 ), changes in temperature, atmospheric pressure, the emergence of noises of various origin, and vibrations at the installation site of the device.…”