Acoustic Emission Monitoring Method
- 1. The basic principle of acoustic emission
- 2. Cumulative damage of metal parts under alternating cyclic loading
- 3. The principle of acoustic emission detection of fatigue cracks
- 4. Feature extraction and denoising of acoustic emission signals
- 5. Some commercial brand AE sensors and basic models
- 6 application scenarios
- references
1. The basic principle of acoustic emission
Detection principle:
detect the small displacement of the surface by acoustic emission. In the process of material processing and use, many factors can cause internal stress changes, such as: dislocation movement, crack initiation and expansion.
Take a chestnut:
According to Fuji [2], the damage will trigger the supersonic stress wave.
The amount of damage a component has sustained is directly proportional to the release of ultrasonic energy detected in the test. That means that if you test the acoustic emission