Table 1 Key parameters of the UPC Device [19]
From: Ultrasonic pitch and catch technique for non-destructive testing of reinforced concrete slabs
Parameter | Unit | Value | Description |
|---|---|---|---|
Color gain | dB | 10 | The brightness of the reconstructed B-scan image |
Analog gain | dB | 20 | Amplification applied to the receiving transducer signals |
Operating frequency | kHz | 50 | Center frequency of transmitted pulse; varied between 25 to 85 kHz depending on material and depth of test object; 50 kHz is recommended as default value |
Velocity | m/s | 2450 | Manually entered shear-wave speed for use in SAFT reconstruction |
Delay | μs | 22 | Time for pulse to travel through the device |
Image quality | – | High | From low to high |
Horizontal step | mm | 50 | Horizontal spacing of grid points |
Vertical step | mm | 50 | Vertical spacing of grid points |