Based on the detection principle of pyroelectric sensing elements , this paper presents a symmetrical peak detection method of continuous double plus - minus pulse signals to eliminate external interference in fixed position heat source 根據(jù)熱釋電敏感元件的探測(cè)原理,本文提出一種對(duì)正負(fù)脈沖信號(hào)和連續(xù)正負(fù)脈沖信號(hào)進(jìn)行對(duì)稱峰值檢測(cè)的方法。