Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform

Table 7

Comparison of envelope method with different wavelets.

Wavelet	Maximum modulus	Average modulus		Relative error/%	Average time/s
db2	0.1688	0.0101	16.6635	0.8553	0.2278
	0.1322		13.0522	2.4698
Sym2	0.1688	0.0101	16.6635	0.8553	0.2326
	0.1322		13.0522	2.4698
Coif1	0.1170	0.0098	11.9468	1.0310	0.2504
	0.1282		13.0869	2.6637
bior2.2	0.1105	0.0089	12.3620	1.0310	0.2688
	0.1195		13.3673	2.6637