Design and Experiment of four Lines Trailed Potato Fertilization Seeder

In order to solve the problems which are widespread in potato seeding planter, such as lower operating efficiency, unideal performance index, higher replay rate and leakage rate and uneven spacing sowing in seeding operating, a trailed potato fertilization seeder was designed. The key components of the special structure had been got through the description of the structure and working principle of the whole machine. A crossing seed-taken technology along with the vibration component was adopted to achieve precision seeding. The results showed in the feld test of the machine： all the performance indexes of the machine met the agronomic requirement of potato planting; the multiple and missing index were low; it completed the ditching, fertilizing, seeding as well as ridging in one planting process; its operation effciency was high and the stability was good. This design of the trailed potato fertilization seeder provided a reference for the development of large traction-type potato seeding machine.

高温固体结构内部动态温度场及其厚度的超声同步测量实验研究

同步测量结构内部温度场及其厚度尺寸对准确评估高温设备的安全性和可靠性具有重要意义。为实现对高温结构内部温度场及其厚度的多参数同步在线无损测量,提出了同步测温测厚实验方案,发展了多参数交替迭代识别的数据处理方法,形成了高温结构内部温度和尺寸多参数同步测量的实验方法。针对20#钢的超声探测实验结果表明:超声法与热电偶等方法的测量结果吻合较好,能够同步在线无损测量高温结构的内部温度场和厚度,具有精度高、可靠性好等优点。多参数同步测量的实验方法可为结构热安全评估提供更加准确的基准输入和评价依据,具有重要的工程应用前景。