АВТОМАТИЗОВАНИЙ ДВОКАНАЛЬНИЙ П’ЄЗОЕЛЕКТРИЧНИЙ ГРАВІМЕТР АГС

Abstract

The purpose of the article is to obtain the basic working equation of motion of a dual-channel piezoelectric gravimeter of the aviation gravimetric system; to prove that a new dual-channel piezoelectric gravimeter has greater accuracy than the known ones. Today, piezoelectric transducers are used to determine the internal defects of solids with the help of ultrasonic waves, to measure the speed of ultrasound, as well as in medicine, mechanical engineering, geophysics, etc. Intensive development of new types of piezoelectric transducers is also carried out in Ukraine. The scientific works of Ukrainian scientists consider the use of piezoelectric transducers only as accelerometers but do not indicate the possibility of their use as dual-channel aviation gravimeters for measuring the acceleration of gravity. From the above review of prominent scientific works, it is clear that there is no information as to the use of the physical phenomenon of the direct piezoelectric effect to create a dual-channel gravity AGS more accurate than a known one. Improving the measurement accuracy in the automated dual-channel piezogravimeter is provided by the fact that the second measurement channel is created. To do this, the sensing element is made with two channels. The output electrical signals of the piezoelectric plates of both channels are summed in the adder. The output signal from the adder is fed to the device for calculating the output signal of the gravimeter (on-board computer), where it is calculated for a certain time interval. As a result, we get the output that contains a double signal of gravity acceleration. It is completely free of such measurement errors, which are caused by the influence of vertical acceleration, instrumental errors and errors from the non-identity of the two channels. The principle of operation of the new dual-channel piezogravimeter is described, its structural scheme is shown. It is shown that it is realistic to achieve greater accuracy of the piezogravimeter AGS (0.5 mGal) by compensating for errors from the influence of vertical acceleration (103 times the useful signal) and instrumental errors and errors from the residual non-identity of the two channels.