The equivalent construction of test environment signals according to the standards or test specifications is the premise of conducting high confidence electromagnetic environment tests. How to quantitatively evaluate the equivalence between the constructed environment signal and the standard environment signal is the key to guiding the equivalent construction of test environment signals.

A sequence segmentation method integrating important points is proposed to quantitatively evaluate the equivalence of strong electromagnetic environmental effect test signals by integrating two indicators: signal amplitude difference and signal similarity. The stability and feasibility of this evaluation method are verified by a typical strong electromagnetic pulse environment signal construction example.

The results indicate that the proposed method preserves the local variation characteristics of the signal to be evaluated and improves the accuracy of the evaluation results. We also comprehensively consider the two-dimensional similarity evaluation of signal distance and direction, which compensates for potential defects caused by a single evaluation indicator and ensures the comprehensiveness of the evaluation results.

The proposed evaluation method has the characteristics of simple calculation, strong practicality and intuitive quantification of evaluation results, giving it guiding significance for the realistic construction of experimental environments.