ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Due to the irregular shape of shrimp, the automatic orientation is difficult. In view of the problems that the orientation link of shrimp pretreatment still relies on manual operation and lacks of orientation equipment, taking headless Penaeus vannamei as the research object, through the analysis of the shape and structure characteristics of the shrimp body, a head and tail orientation method was proposed, and the head and tail orientation mechanism of shrimp was analyzed. The theoretical study showed that it was feasible to orient shrimp’s head and tail by means of opposite rotation of parallel rollers. According to the shape parameters of shrimp, a directional conveying device for shrimp was designed. Medium-sized and large-scale shrimps were selected as the experimental objects. The single factor and orthogonal experiments were carried out with the roller gap, the conveying speed of pushing plate and the rotation rate of orientation roller as the experimental factors, and the orientation success rate as the index. Through the experiment, the influence law of each experimental factor on the orientation effect was explored, and the main parameters of the test device were optimized. The experimental results showed that the optimal parameters combination of the experimental device were as follows: the conveying speed of pushing plate was 40mm/s, the rotation rate of orientation roller was 90r/min, the corresponding roller gap of medium-sized shrimp was 10mm, and that of large-sized shrimp was 13mm. Under the optimal combination of parameters, the success rates of medium-sized and large-scale shrimp were 97.3% and 94.7%, respectively. The research can provide theoretical and technical support for the development of shrimp orientation equipment.