电热杯火灾物证鉴定方法研究

模拟电热杯正常使用、通电过热、正常使用后受火灾作用和通电过热后受火灾作用,获得在不同实验条件下的电热杯火灾残留物,用扫描电子显微镜对电热杯火灾残留物中的电热丝显微形貌进行观察。结果表明,在不同实验条件下,电热丝的显微形貌有明显的不同。因此,利用扫描电子显微镜,观察电热杯电热丝的显微形貌,可以直观、便捷地鉴别电热杯在火灾前所处的状态,为电热杯火灾原因的认定提供了一种新的技术方法。

The Study of Fire Trace Evidence Identification Method for Electrical Heating Cup

In this article,through simulating four conditions of the electrical heating cup: normal used,electrical superheated,heated in fire after normal used,and heated in fire after electrical superheated,the fire residues of electrical heating cup are obtained under different conditions.The microscopic appearances of heated wire are observed through scanning electron microscope.The result indicates that the microscopic appearances in different conditions are not the same.Therefore,the state of the electrical heated cup before fire can be distinguished directly and quickly by observing the microscopic appearances of heated wires.This provides a new technical method for the recognition of fire causes.