What is Ultrasonic?
Introduction of Ultrasonic Detection and Necessity
Ultrasonic
Ultrasounds are sound waves with frequencies higher than
the audible range (16kHz to 20kHz) of human hearing
Causes for the generation of ultrasound
- Problems in electricity facilities that have electric discharges cause ionization in the air
- Leaking or sucking of any form of gas causes turbulence flows in the air
- Trouble with machinery, including loose parts or friction, is a cause of ultrasound emission
Ultrasonic Technology
Technology Description
Types of energy from defective parts
Types of Energy
| Sound energy |
Category |
Electromagnetic energy |
| Ultrasound |
Type of wave |
Electromagnetic |
| Air |
Medium of movement |
Electrons |
Stable
40kHz(±5kHz) |
Detection band width |
Random
500kHz~1GHz |
| Within 30 meters |
Detection range |
Random within 100meters |
| Only moves straight |
Directivity |
No directivity
(can come from all directions) |
Comparison to high-frequency electromagnetic wave detection method
UDS
(Ultrasound) |
Category |
Electromagnetic wave detection |
| Possible |
Broad range detection
(from moving vehicle) |
Possible |
| Possible |
Detailed detection |
Not Possible |
| Possible |
Detailed live wire detection |
Not Possible |
| Steady and distinguishable |
Waveform |
Difficult to standardize |
| Useful for detailed inspection |
Advantages |
Useful for broad range inspection |
High-frequency electromagnetic wave detection method
Electromagnetic waves occur in different frequencies, so signals that are not within the settings of the detecting device are difficult to notice
Ultrasound detection method
All ultrasound waves from electricity facilities are all detectable around 40kHz, so all defaults are detectable without changing the bandwidth settings
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