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

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of product monitoring and diagnosis, and is mainly used for online monitoring of blade circular runout parameters, especially for the detection of circular runout of cross-flow air impellers such as air conditioners, and has the functions of displaying measured parameters and alarming display of qualified and unqualified. Background technique [0002] The cross-flow fan blade is an important part of the air conditioner and gas delivery equipment, and its geometric characteristic parameters will directly affect the noise level and air delivery efficiency of the air conditioner. Therefore, there are high requirements for the geometric parameters of the cross-flow fan blade structure. Among them, the circular runout of the cross-flow fan blade is one of the most important parameters in its structural geometric parameters. It is an urgent need in the market to propose an automatic non-contact online diagnosis dev...

AI Technical Summary

Problems solved by technology

According to the data retrieval results, several circular jump detection methods related to the present invention are mainly based on the use of laser detection technology and machine vision detection technology ([1] Taiyou Technology. Jump Test (T01) [EB / OL]; [2] Xiang Shengmei. Research on data processing system for radial runout measurement of discontinuous rotary surface [D]. Master's degree thesis. Changchun: Changchun University of Science and Technology, 2008;), this kind of technology has high requirements for system hardware, high development cost and great difficulty , the measurement of different products needs to be re-calibrated, and the adaptability is not strong

The corresponding laser detection technology adopts the diffraction method, which is only suitable for small-scale precision measurement. The circular runout measuring instrument based on the laser scanning method can only measure the single-point radial circular runout parameters of shaft parts.

The manual method has the disadvantages of low monitoring efficiency, the monitoring results are greatly affected by human subjective factors, and the long-term monitoring is easy to cause visual fatigue of the workers. The measuring instrument can only measure a single circular runout parameter and alarm when it exceeds the limit.

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