トンネル火災検知器の清掃省力化を実現する汚損防止ダクトの開発

抄録

To detect fires in the tunnel, fire sensors are installed according to the tunnel grade. And, in order to maintain the fire detection function, the detection lens must be cleaned so that the transmittance does not deteriorate. In some tunnels, there is an environment where soot and dust easily adhere, so there are fire sensors which cleaning is done more than the standard cycle. This time, in order to suppress the adhesion of soot and dust, we developed a duct to improve the flow velocity around the lens using CFD analysis, and we were able to suppress pollution by about 30%.