On-line monitoring method and on-line monitoring device for boiler expansion

The invention provides a boiler expansion on-line monitoring method and an on-line monitoring device, the on-line monitoring device comprises a fixed base, the fixed base is installed on a steel structure or ground supporting a boiler body, and a marker is installed on the boiler body; a horizontal rotating mechanism is connected to the fixed base, a pitching rotating mechanism is fixed to the horizontal rotating mechanism, an industrial camera and a laser ranging assembly are installed on the pitching rotating mechanism at the same time, and the horizontal rotating mechanism and the pitching rotating mechanism are adjusted to enable a camera light spot of the industrial camera to be aligned with the marker. And the laser ranging assembly is used for ranging. The on-line monitoring device can monitor the expansion condition in time, early warns and prevents potential safety risks. 本发明提供了一种锅炉膨胀在线监测方法以及在线监测装置，所述在线监测装置包括：固定底座，所述固定底座安装在支撑锅炉本体的钢结构或地面上，锅炉本体上安装有标志物；固定基座上连接有水平旋转机构，所述水平旋转机构之上固定有俯仰旋转机构，俯仰旋转机构上同时安装有工业相机