As we know, the ultrasonic transducer is excited by the high frequency electrical pulse, and then the ultrasonic wave
propagates in the detected medium.
not only can degrade pollutants through oxidation and pyrolysis processes in soil, but also move the pollutant to the other sources such as water through soil washing which is much easier to decontaminate it [12- 15].
Modelling of the ultrasonic wave
propagation in the waveguides was carried out using a finite element technique as well.
The propagation behaviour of high frequency stress wave is determined by the measurement of velocity and attenuation of ultrasonic waves
, as a function of environmental variables such as temperature, pressure etc.
In this study, the soil flushing tests were conducted for two conditions, without ultrasonic waves
and with ultrasonic waves
at 20 kHz frequency.
A 40-mm diameter rod was connected to the directional converter of ultrasonic waves
to focus the ultrasonic waves
on the molding product.
1] stress, this is treated with ultrasonic waves
, using a transductor able to generate ultrasonic waves
with power of 150 W.
For transit time flowmeters, a transducer sends an ultrasonic wave
across the flowing stream to the receiving transducer.
For applications which require all measurements to be recorded, the measuring cell of the urea sensor contains two piezo ceramics, which both emit and detect ultrasonic wave
It can also be dismounted without tooling, and cleaned via ultrasonic wave
Also the ultrasonic wave
emitters are beamed by the computer system, so that user feels the keyboard pressing against their skin, without anything being in their hand.