Pulse and frequency responses of broadband low frequency ultrasonic transducers
نویسندگان
چکیده
منابع مشابه
Low-Frequency Pulse Width Modulation Control Methods of Ultrasonic Motor
Because of the serious non-linearity and coupling among state variables caused by the complex energy conversion process in ultrasonic motor, the motion control strategy of ultrasonic motor still need to be studied in detail to obtain better performance. As a kind of special control method, the low-frequency PWM control strategy can make the on-line optimum control easier, and may be an effectiv...
متن کاملCalcium Silicate Bricks – Ultrasonic Pulse Method: Effects of Natural Frequency of Transducers on Measurement Results
Modulus of elasticity is one of the important parameters of construction materials, which considerably influence their deformation properties and which can also be determined by means of non-destructive test methods like ultrasonic pulse method. However, measurement results of ultrasonic pulse methods are influenced by various factors, one of which is the natural frequency of the transducers. T...
متن کاملAir-Coupled Low Frequency Ultrasonic Transducers and Arrays with PMN-32%PT Piezoelectric Crystals
Air-coupled ultrasonic techniques are being increasingly used for material characterization, non-destructive evaluation of composite materials using guided waves as well as for distance measurements. Application of those techniques is mainly limited by the big losses of ultrasonic signals due to attenuation and mismatch of the acoustic impedances of ultrasonic transducers and air. One of the wa...
متن کاملLow frequency ultrasonic debridement: a clinical experience
Low Frequency Ultrasonic Debridement (LFUD) provided by the Sonoca 185 is a new method of debriding wounds that is less traumatic, less painful and can achieve faster healing rates. It is bactericidal and enables many debridement treatments to be undertaken by a podiatrist or wound consultant in their smaller clinical setting. Due to the many properties of LFUD the clinical indications for use ...
متن کاملFrequency Effects in High-Frequency Pulse- Echo Ultrasonic Imaging of Titanium Metal Matrix Composites
Inspection of titanium matrix composites (TiMMCs) is required during manufacture, to ensure that defects are found before the material is incorporated into complex structures. The manufacturing process involves lay-up of fibres followed by Hot Isostatic Pressing. Individual fibres must remain in alignment and with precise separations in order to maintain the mechanical properties of the materia...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ultrasound
سال: 2011
ISSN: 1392-2114
DOI: 10.5755/j01.u.66.1.264