Typical Data Storage Requirements
The amount of measurements recorded during flux leakage inspection can be quite large. To estimate the data, multiply the number of sensors times the total distance divided by data recording interval. Examples are shown below:
|
Number of Sensors |
Distance |
Data Recording interval |
Amount of data |
|
160 |
100 miles |
0.2 inches |
5,068,800,000 |
|
250 |
200 km |
2.5 mm |
20,000,000,000 |
|
250 |
200 miles |
0.1 inches |
31,680,000,000 |
|
300 |
800 km |
2 mm |
120,000,000,000 |
Digital storage systems are capable of recording on the order of 25 gigabytes (25 billion data points) with 256 unique signal levels (1 byte = 8 bits which means 28 unique levels). Operating temperature, shock and vibration loading and other constraints affect the recording and must be carefully considered by pigging vendors when implementing a recording system.