Signal Feature Extraction and Quantitative Evaluation of Metal Magnetic Memory Testing for Oil Well Casing Based on Data Preprocessing Technique

Table 1

Quantitative evaluation on danger level for oil well casing.

Serial number	Gradient value; (A/m/mm)	Peak-peak value; (A/m)	Output; classification
1	4	130	00
2	5	150	00
3	8	210	01
4	9	260	01
5	9	230	01
6	14	300	10
7	10	230	10
8	12	250	10
9	18	280	11
10	14	270	11
11	7	200	01
12	10	286	10