RU-2861657-C1 - PIEZOELECTRIC VIDEOSCOPE DRIVE

RU2861657C1RU 2861657 C1RU2861657 C1RU 2861657C1RU-2861657-C1

Abstract

FIELD: controlling manipulations. SUBSTANCE: essence of the invention is that the piezoelectric drive of the videoscope consists of a component piezoelectric drive and a converting element, in which the component piezoelectric drive is presented in the form of a monolithic piezoelectric hollow cylinder with axial polarization relative to the axis of rotation, with pairs of electrodes applied to the inner and outer sides of each of the four segments of the monolithic piezoelectric hollow cylinder, arranged in a sequence relative to the length of the cylinder and made in the form of strips, which are parallel to the axis of rotation of the monolithic piezoelectric hollow cylinder with their adjacent sides to another pair of electrodes, while each pair of two bands opposite each other in opposite segments is supplied with a phase-shifted voltage π/2 relative to a nearby similar pair, providing a circular rocking motion of the piezoelectric element, with a displacement vector parallel to the axis of rotation of the monolithic piezoelectric a hollow cylinder, and pairs of other electrodes, following each other in arrangement relative to the length of the cylinder, are energized with a phase shift of +λ in order to provide additional oscillatory vibrations in in the format of a traveling wave on a monolithic piezoelectric hollow cylinder as a bimorphic bending element relative to the length of the monolithic piezoelectric hollow cylinder, with a displacement vector perpendicular to the axis of rotation of the monolithic piezoelectric hollow cylinder, while the converting element, which is a metal sphere fixed to the video scope, rests on the monolithic piezoelectric hollow cylinder and sums both the vector of circular rocking motion and the vector of outgoing wave motion, resulting in a two-dimensional vector of video scope control motion. EFFECT: technical result is the ability to control the video scope spatially. 1 cl, 4 dwg

Inventors

PRILEPKO PAVEL ANATOLEVICH

Dates

Publication Date: 20260506
Application Date: 20250921

Claims (1)

A piezoelectric drive of a videoscope consisting of a component piezoelectric drive and a converting element, in which the component piezoelectric drive is presented in the form of a monolithic piezoelectric hollow cylinder with axial, relative to the axis of rotation, polarization, with pairs of electrodes applied to the inner and outer lateral sides of each of the four segments of the monolithic piezoelectric hollow cylinder, in arrangement following one another relative to the length of the cylinder and made in the form of strips that are parallel to the axis of rotation of the monolithic piezoelectric hollow cylinder with their adjacent sides to another pair of electrodes, wherein to each pair of two strips opposite relative to one another in opposite segments a voltage with a phase shift of π/2 relative to a nearby similar pair is applied, ensuring a circular rocking motion of the piezoelectric element, with a displacement vector parallel to the axis of rotation of the monolithic piezoelectric hollow cylinder, and to pairs of other electrodes, following one another in arrangement relative to the length of the cylinder, a voltage with a phase shift of +λ is applied in order to provide additional rocking oscillations in the format of a traveling wave on a monolithic piezoelectric hollow cylinder as a bimorphic bending element relative to the length of the monolithic piezoelectric hollow cylinder, with a displacement vector perpendicular to the axis of rotation of the monolithic piezoelectric hollow cylinder, wherein the converting element, made in the form of a metal sphere, secured by a videoscope, rests on the monolithic piezoelectric hollow cylinder and sums both the vector of the circular rocking motion and the vector of the outgoing wave motion, obtaining a two-dimensional vector of motion for controlling the videoscope.

Description

The invention relates to piezoelectric technology and can be used to control manipulations. Piezoelectric attenuator actuators (piezo actuators) are ultra-precision short-stroke linear electric drives that convert electrical voltage into small but precisely controlled linear movement with high force output. In this regard, the source where can be found in "Development of a Methodology for Designing an Instrument Drive with a Piezoelectric Actuator" (https://cyberleninka.ru/article/n/razrabotka-metodiki-proektirovaniya-pribornogo-privoda-c-piezoelektricheskim-ispolnitelnym-aktyuatorom?ysclid=mfew4co455909656848). From our perspective, the mention of the construction of piezoelectric actuators based on the traveling wave principle is of interest. In other words, the principle is used whereby the waveform acts as the driving force for fluid masses, or whereby a traveling wave moves and "drives" the fluid mass ahead of it, thereby ensuring the pumping of said fluid mass. This principle is achieved by applying a phase-shifted voltage to a series of piezoceramic plates, causing them to oscillate not in standing wave mode, but in traveling wave mode. The prototype of this invention is the patents "Pumping-rotating piezoelectric pump" (see Russian Federation patent No. 2012127523, published on 10.01.2014, IPC F04B 43/08), "Piezoelectric pump" (see Russian Federation patent No. 2012127533 published on 10.01.2014, IPC F04B 43/00), "Piezoelectric drive" (see Russian Federation patent No. 127 519, published on 27.04.2013, IPC H01L 41/08). These drives clearly demonstrate the advantages of using the traveling wave principle. However, there are a number of disadvantages, namely the irrelevance of using a piezoelectric drive in terms of direct controlled manipulations of impact devices. The closest analogue, which partially solves the specified problems, is the patent "Equipment for driving a mirror, a method for controlling this equipment for driving a mirror and a method for manufacturing this equipment for driving a mirror" (see Chinese patent No. CN102998795B published on 2016-12-21, IPC HO2N 2/00). The converting element in this device is a piezoelectric transducer, which addresses the mirror in the required direction. The advantage of this design is a compact construction, the use of a high value of the piezoelectric coefficient d 31 determining the efficiency of electromechanical conversion . The disadvantages are: 1. Relative mechanical unreliability of the glued segmented piezoelectric element; 2. Drive control occurs only in one degree of freedom and cannot be modernized without significant design changes and an increase in complexity. The listed disadvantages inherent in the analogue and prototype are eliminated in the claimed technical solution “Piezoelectric drive of a videoscope”. The purpose of the invention is to control a piezoelectric drive in three dimensions and to strengthen the design of the piezoelectric drive. The technical result is a piezoelectric drive for a videoscope, which provides spatial control of the videoscope by using a component piezoelectric transducer made from a piezoelectric hollow cylinder. In order to solve the said problem, it is proposed to use a component piezoelectric drive presented in the form of a monolithic piezoelectric hollow cylinder with axial, relative to the axis of rotation, polarization, with a pair of electrodes applied to the inner and outer lateral sides of each of the four segments of the monolithic piezoelectric hollow cylinder, in an arrangement following one another relative to the length of the cylinder and made in the form of strips that are parallel to the axis of rotation of the monolithic piezoelectric hollow cylinder with their adjacent sides to another pair of electrodes, wherein to each pair of two strips opposite to each other in opposite segments, a voltage is applied with a phase shift of π/2 relative to a nearby similar pair and providing a circular swinging motion of the piezoelectric element, with a displacement vector parallel to the axis of rotation of the monolithic piezoelectric hollow cylinder, and to pairs of other electrodes, following one another in an arrangement relative to the length of the cylinder, a voltage with a phase shift of +λ is applied in order to provide additional swinging oscillations in the format of a traveling wave on a monolithic piezoelectric hollow cylinder, as a bimorphic bending element relative to the length of the monolithic piezoelectric hollow cylinder, with a displacement vector perpendicular to the axis of rotation of the monolithic piezoelectric hollow cylinder, wherein the converting element, made in the form of a metal sphere secured by a videoscope, rests on the monolithic piezoelectric hollow cylinder and sums both the vector of the circular rocking motion and the vector of the outgoing wave motion, obtaining a two-dimensional vector of motion for controlling the videoscope. Fig. 1 shows an example of