速冻青豆残次品在线检测与剔除系统

Online Detection and Elimination of Unqualified Frozen Green Beans

采用机器视觉技术提取速冻青豆的颜色和形状特征,并设计了残次品在线检测与剔除系统,包括均匀铺料系统、输送装置以及图像处理装置.铺料系统中的尼龙板输送带上设计有矩阵分布式沉头孔,调节传送带的倾角可实现青豆的均匀有序排列.上位PC机中的图像采集处理系统实现针对青豆外观残次品的识别与定位,通过串口通信将位置信息传递给下位PLC,驱动多点并列电磁阀控制多路高压气流的通断,完成残次品的在线剔除.实验证明:该系统能够有效地识别速冻青豆中的残次品并实现在线同步剔除.

Machine vision technology was used to get the color and shape features of quick-frozen green beans and an online detection and elimination system for unqualified products was designed,including a uniform paving system,a conveying device and an image processing device.A matrix distributed countersunk head hole was designed on the nylon plate conveyor belt in the paving system.The uniform and orderly arrangement of green beans can be realized by adjusting the inclination of the conveyor belt.The image acquisition of the processing system in the upper PC can help recognize and locate the unqualified green beans.Through serial communication,the above information is transmitted to the lower PLC which drives the multi-point parallel solenoid valve to control the multi-channel high-pressure air flow interruption and complete the online rejection of the unqualified products.Experiments show that the system can work effectively and thus realize online synchronous elimination of unqualified quick-frozen green beans.