Cross-flow fan-blade radial-circle-jump-degree non-contact online diagnostic device and method

The invention provides a cross-flow fan-blade radial-circle-jump-degree non-contact online diagnostic device and method. The device includes a sensor module, a signal conditioning processing module, a power module, a one-chip-microcomputer central information processing unit module, an LCD diagnosis display module and an acousto-optic alarm module. In the method, non-contact online measurement of circle-jump-degree parameters at a plurality of positions of a cross-flow fan blade is performed through a laser displacement sensor using a laser triangulation method as the principle to diagnose whether the cross-flow fan blade is qualified. The laser triangulation method is based on a classical optical triangulation principle. When an object plane moves, the movement direction forms an inclined angle with the optical axis of a receiving optical path. The cross-flow fan-blade radial-circle-jump-degree non-contact online diagnostic device is capable of online diagnosis of the radial circle jump degree of the cross-flow fan blade and has the advantages of being high in automation degree, reliable in diagnosis and high in diagnosis efficiency. The device is capable of realizing noncontact diagnosis of cross-flow fans of different specifications.