Piezoelectric precision driving-based linear bidirectional actuator and working method thereof

Abstract

The invention discloses a piezoelectric precision driving-based linear bidirectional actuator and a working method thereof. The actuator mainly comprises phosphor bronze substrates, piezoelectric ceramic sheets and a connection rod, wherein the piezoelectric ceramic sheets are arranged on upper end surfaces of the phosphor bronze substrates. Most of traditional actuators are complicated in structures, are rotation actuators and are difficult to miniaturize. The actuator is formed by oppositely arranging a pair of phosphor bronze substrates and connecting the phosphor bronze substrates by the connection rod, the phosphor bronze substrates are asymmetric in structures, and bidirectional movement of a device on a straight line can be achieved by respectively applying sine-cosine voltages ontothe piezoelectric ceramic sheets on the two phosphor bronze substrates, The piezoelectric precision driving-based linear bidirectional actuator is simple in structure, is easy to miniaturize, can beused in occasions such as medicine supply to a biopsy passage in a digestive canal endoscope and moving of a medicine machine such as biopsy forceps, stable, reliable, accurate and controllable bidirectional moving on a predetermined rail is achieved, and feeding action in a micro passage is achieved.

Description

technical field [0001] The invention relates to the field of medical equipment, more precisely, a linear bidirectional actuator based on piezoelectric precision drive and a working method thereof. Background technique [0002] With the development of modern medical technology, precision surgery has received more and more attention. Different from the extensive traditional surgery dominated by experience, the realization of precision surgery relies on modern technology, especially high-tech precision medical equipment. With the assistance of medical equipment and precise positioning, the exact location of the lesion can be determined for targeted treatment. This will not only reduce the waste of medical resources, but also reduce the suffering of patients. [0003] Existing medical devices generally use actuators as active control components for positioning, and these components tend to be miniaturized and high-precision with the needs of medical applications. Existing pie...

AI Technical Summary

Problems solved by technology

Existing piezoelectric ceramic actuators, electrostrictive actuators, magnetostrictive actuators, and shape memory alloy actuators used in medical devices are mostly complex in structure and mostly rotary actuators , difficult to miniaturize

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