INTRODUCTION The first ultrasonic motor was developed by V.V. TYPES OF ULTRASONIC MOTOR ULTRASONIC MOTOR STANDING TRAVELLING WAVE TYPE. Www.slideworld.com www.pdf-searchengine.com. X2022 The first ultrasonic motor was introduce by v.v lavrinko in 1965.x2022 An. Ultrasonic motor Standing Traveling wave wavebidirectional unidirectional 8. Rakesh R.standing wave piezoelectric linear ultrasonic mot...

The velocity of ultrasonic waves traveling in a media reflects the dynamic properties of that media, which should depend on the physical properties. Taking advantage of the easy-operation and non-destructive nature of the ultrasonic technology, it is possible to determine some physical properties of frozen soils indirectly by using this technique, either in the laboratory or in the field. A ser...

Structural health monitoring (SHM) is an emerging technology with great potential in structural diagnosis and prognosis. SHM systems can be passive or active. Active SHM systems rely on structural interrogation using active sensors (transducers) that can transmit and receive ultrasonic Lamb waves traveling at large distances in the structural material. Piezoelectric-wafer active sensors (PWAS) ...

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A high-thrust screw-type piezoelectric ultrasonic motor with a three-wavelength exciting mode is proposed in this paper. The motor mainly includes a stator and a screw output shaft, and the stator is composed of twelve rectangular piezoelectric plates and a hollow metal elastomer with an internal thread. The stator can be excited to generate the combined micro ultrasonic vibration mode. With th...

Preload optimization is very important for ultrasonic motors’ design and application. In this paper, a novel method traveling-wave rotary motor proposed. Firstly, based on linear regression the analytic hierarchy process (AHP), mapping between drive characteristics, mechanical speed stability, preload of traveling-wave-type was established. Then, characteristic curves stalling torque, no-load s...

Non-contact ultrasonic, enables rapid testing of structures using ultrasonic tests that are not possible via conventional contact transducers. This paper reports on laser ultrasonic and air/gas coupled ultrasonic measurements that are performed remotely, do not require direct access to test area, do not need traditional ultrasonic coupling and do not have traditional C-scan fixture requirements...

According to the shortcomings of the existing ultrasonic wind velocity measurement device, for instance, complexity of circuit and difficulty of signal processing, a new ultrasonic wind velocity measurement is put forward based on phase discrimination and a new sensor configuration as well. Thus, a system model is built. Firstly, an equilateral triangle should be constituted by an ultrasonic em...