| 摘要 |
The present invention relates to a technology to allow a terminal to give a warning by detecting harmful gases existed in the atmosphere, gases harmful to the human body, or environments having high humidity using a semiconductor-type gas sensor (doping nickel oxide NiO_2 to SnO_2). The technology is to let people know how dangerous the gases are by making the color and sound different according to the degree of harmfulness or concentration of the gases when warning. |
