Abstract: Due to the presence of halogen elements, the smoke of flame-retardant cables is toxic and has high fire hazards. Accurate detection is the key to discover and control accidents. This article uses the JCY-2 building material smoke density meter to carry out the YJV flame retardant cable under strong fire source ignition experiment. The density of the smoke generated by the cable outer sheath when the adsorbent material adsorbs for 20, 50, and 100 seconds is tested, and electron microscopy images of the adsorbent material are taken. ImageJ software is used to process and analyze the surface grayscale and characteristics of the adsorption particle. And discuss the feasibility of adding adsorbent material to improve the detection accuracy of existing photoelectric smoke detectors. The results show that the longer the cable is under poor ventilation conditions during the combustion process, the lower the smoke density peak, and the higher the grayscale of the adsorption material surface; The adsorbent material can effectively adsorb and enrich smoke particles, and the smoke particles exhibit changes in surface adhesion, network adhesion, and cylinder adhesion with the change of adsorption time; The diameter of the adsorbent material mesh fiber less than 9 μm can achieve good adsorption effect. The research results provide new ideas for cable fire warning and detection as well as fire investigation in wind flow environments.

Key words: detector improvement, flame resistant cables, external ignition source, smoke characteristics, ventilating current, smoke particle