Advantages of Using Ultrasonic Signals over Audible Signals in Mechanical Monitoring

There are many detective applications using ultrasonic, such as distance and structural diagnosis. However, if we apply it in monitoring mechanical operations, it overrides audible signals in many ways.

People usually use audible sound in detection, .as it is a direct representation of noises we heard from those machines. And it is cheap and easy, in both hardware and software for capturing data in audible range.?

After being tested in various working environments, ultrasonic showed? absolute advantages over audible signals.

1. First critical advantage,? the ultrasonic domain is a relatively clean environment. Except some specific animals would produce ultrasonic, but there is nearly no noise from nature in the ultrasonic domain.?This relatively low noise can help us to increase the detection range with the same SNR.
2. Objects vibrations, wind blowing. explosions and human activities all produced lots of noise in audible range, which made the audible sensor get saturated easily, which disabled the audio detectors from operating correctly.?In worksites, the environment is harsh with lots of audible noise, sometimes workers are required to wear protective headphones within the working area. Any audible detectors would not work in those scenarios. But detectors in ultrasonic range can function as normal in harsh environments.?
3. All machinery is covered and designed to minimize audible noise, this blocked signals in audible range from reaching out. However, signals in ultrasonic range are left untouched. Also the penetrating power of the signal in ultrasonic is higher. This makes ultrasonic signals more available for detectors.
4. In addition, is the detail level. In ultrasonic signals, which have a higher frequency than audible signals, can respond in a greater detail. Like EUV vs UV in making semiconductors, a higher frequency media can respond to a higher resolution. Hence the information carried can represent the collision in higher detail. This helps to identify the signals recorded in ultrasonic.
5. Lastly, it is a privacy concern. Monitoring refers to capturing signals around the target machinery. It would worry any people nearby, as their chat may be recorded accidentally.?In detecting ultrasonic, all audible signals would be filtered out. This removed? everyone’s privacy concerns, hence monitoring can be implemented in crowded and busy area..

These advantages made ultrasonic signals a better media over audible signals to monitor mechanical operations.?

All of these advantages are concluded after we tried lots of different media on monitoring in various working environments. Other media may work in quiet, clean laboratories but not in harsh, noisy and dirty worksites.