IEEE academic vector diagram, industrial internet cloud-edge-terminal five-layer decoupling architecture, flat 2D technical schematic, no title inside figure, all text inside Chinese, layered horizontal layout, equipment access layer, edge computing layer, network transmission layer, platform service layer, web application layer, bidirectional data flow arrows, 5s heartbeat detection logic block, GigE/RTSP/Modbus protocol labels, TLS encryption module, minimalist blue-gray industrial color, 300DPI high precision, paper figure standard, no 3D rendering, clean white background Mehr sehen