Characteristics of the Received Signal of an Ultrasonic Sensor Installed in a Chamber with Micro-Leakage
<p>As fossil fuel depletion and environmental pollution problems are becoming increasingly more serious, interest in the efficient use of natural resources and alternative energy is rapidly growing. In particular, interest in fuels stored as high-pressure gases such as natural gas and hydrogen...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Copernicus Publications
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/7b5f37e194024affb8bfb15beaefaba1 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | <p>As fossil fuel depletion and environmental pollution
problems are becoming increasingly more serious, interest in the efficient
use of natural resources and alternative energy is rapidly growing. In
particular, interest in fuels stored as high-pressure gases such as natural
gas and hydrogen is also rising. Ultrasonic waves show various received
signals according to characteristics such as density of the medium and
acoustic impedance. An experimental study on the detection of the
micro-leakage of fuel stored as high-pressure gas was conducted based on the
characteristics of ultrasonic waves. First, an ultrasonic sensor was
manufactured by selecting the matching layer with consideration of the
acoustic impedance. In the experiment, a mass flow controller (MFC) was
attached to a perforated hole in the fabricated chamber to generate
micro-leakage, and the signal from the receiving ultrasonic sensor was then
collected. The envelope signal of the received ultrasonic sensor signal was
analyzed through the Gaussian distribution method. The temperature inside
the chamber and the received voltage decreased according to a similar trend
and showed a nonlinear result. However, the phase of the received ultrasonic
sensor signal showed a relatively linear result according to the internal
pressure change. Micro-leakage could not be detected with only the received
voltage seen by the ultrasonic sensor. Therefore, the phase shift of the
receiving ultrasonic sensor can be used to detect micro-leakage in a
high-pressure gas tank.</p> |
|---|