Piezoelectric motor in medical device manufacturing 10 great advantage in the (1)

Medical device manufacturers are increasingly using piezoelectric motors and actuators in place of conventional electromagnetic motor, because the former in medical device design with congenital advantage.

Piezoelectric devices currently being used for a range of medical applications, including: ultrasonic transmitter, artificial insemination, medical Nano micro-injection pumps, micro-monitoring, surgical equipment, compatible with magnetic resonance of robots, micro-dosages of dispensing, cell pathology of cells infiltrate and cell imaging, and so on. Piezoelectric device can also be used for the treatment of medical materials, such as pickup and placement system, drug delivery devices, 3D scanning, ophthalmology, Dermatology and cosmetic surgery with laser beam control.

As shown in the figure a perforated custom ceramic package piezo stack

For motion control applications based on piezoelectric technology

At present there are many different types of piezoelectric actuators and motors.

The following is medical equipment applications more commonly used some models:

Simple piezoelectric actuators.

Piezoelectric actuator extension and voltage in proportion. Its range of motion is basically the driving voltage is proportional. Child family includes:

■ Stacked actuators (most common).

Characterized as the power of large, response speed, movement, distance short.

■ Cut the actuator.

At present the market's fastest x-y System. Power and frequency can be very high. Line spacing is usually limited to 20 microns.

■ Tube actuator.

Mainly used for applications in micro-dispensing and AFM scanner.

■ Bending actuators.

Can be set to move long distances (deviation) to a few millimeters, but performance-driven small and low-frequency.

■ Bending boot piezoelectric actuators.

There is no friction curvature and motor amplifier to provide long distance and is very linear movement. The basic range of motion and driving voltage is proportional. There is a variety of integrated multi-axial system. Motion range up to 2 mm. Look forward to no wear and tear of performance without friction.

■ Ultrasonic friction motor.

Ultrasonic friction motor based on piezoelectric plate (stator) of high-frequency vibration. Their movement is not restricted, high speed, fast response (10 MS). Vibration through friction transfer to vane or rotor. However, due to the presence of friction, the resolution is limited to 50 nm in General.

■ Piezoelectric stepper motor.

Stepping motor sport range basically not restricted. Stepping Motor based on the accumulation of small controllable steps. Other properties are as follows:

■ Picometer resolution jitter mode (direct piezoelectric driving).

■ Compact and power up to 155 lb (for out-of-the-units).

■ Fast response (less than 1 millisecond).

Hardness is extremely high.

Ultrasonic sensor.

High-frequency ultrasonic sensor by Department or spare resonance. They are often used as a sensor or transmitter, and are used in the atomizer.