Method for detecting injection molding starving defect of cross-flow fan on basis of laser sensor array as well as device

Abstract

The invention provides a method for detecting an injection molding starving defect of a cross-flow fan on the basis of a laser sensor array as well as a device. The device comprises a laser emission array, a laser sensor receiving array, an analog signal processing circuit module, a single-chip microcomputer information processing module and a power module, wherein pulse laser signals are emitted by the laser emission array; the laser sensor receiving array receives the pulse laser signals transmitted through the cross-flow fan; the analog signal processing circuit module performs difference and voltage matching on the received pulse laser signals and inputs the processed signals to an A / D interface of a single-chip microcomputer; the single-chip microcomputer information processing module performs real-time feature extraction, feature fusion and decision discernment on the signals subjected to A / D digitization in real time; a message indicating whether the cross-flow fan product is qualified or not is output directly by a display module; setting of detection parameters, control of a detection process and detection data statistics are realized by a human-computer interaction module. The device realizes on-line automatic monitoring of the injection molding starving defect of the cross-flow fan.

Description

technical field [0001] The invention belongs to the field of product quality online monitoring and diagnosis technology research, and in particular relates to a method and device for detecting material shortage defects of cross-flow fan blade injection molding based on a laser sensor array. Background technique [0002] The wind impeller is an important part of the air supply equipment such as air conditioners. It is welded by the injection molded parts of the cross-flow fan blades. The quality of the fan blades affects the air supply stability and noise performance of the equipment. In the production process of injection molded blades, there will be quality problems such as lack of material at the bottom. In the current production process, many companies use manual detection methods to detect material shortage defects. In addition to increasing labor costs and reducing production efficiency, this method also has problems that time-consuming work can easily lead to worker fa...

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Problems solved by technology

The detection technology based on the infrared sensor array realizes the online real-time detection of the failure of the material shortage of the cross-flow fan ((1) Song Shoupeng, Zhao Tengfei, etc. Online diagnostic device for the lack of material of the static cross-flow fan: China, ZL201310588858. (2) Song Shoupeng, Zhao Tengfei et al. On-line diagnostic device for material shortage fault of rotary injection molding blade: China, ZL201310589515.5), but there are still small material shortage defects that cannot be detected (2 ) deficiency

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