Authors

Abstract

In view of the problems of long coating time, complicated manual operation, high multi-seed rate of coated seeds, low qualified rate, and low degree of automation of control equipment in traditional rotary coating machine, a new type of rotary coating machine was designed while using LabVIEW with a complete electric control system, which can effectively improve the speed and quality of coating. The system uses single-chip microcomputer as the lower computer, LabVIEW as the upper computer, and uses programming electronic control technology to set seed coating parameters in advance, precisely control each part and achieve precise supply. Batch supply of powder and liquid greatly improves the automation and intelligence of the operating system, improves the coating efficiency, reduces the multi-seed rate and the seedless rate, and increases the coating pass rate. In order to improve the coating quality and the supply accuracy of the coating machine, the error analysis and calibration test of the seed supply system, powder supply system and liquid supply system were carried out. After the test verification, the supply error was controlled within 2% to meet the demand for precise supply. The test results show that the pass rate of the seeds coated by the new rotary coating machine is increased by 15% to 20% compared with the seeds coated by the traditional manual coating.

Abstract in Chinese

针对传统旋转式包衣机存在包衣时间长、人工操作复杂、包衣种子多籽率高合格率低、控制设备自动化程度低等问题，设计了一套新型旋转式包衣机的同时，运用 LabVIEW 设计了一套完整的电控系统，可有效提高包衣的速度和质量。该系统以单片机作为下位机， LabVIEW 做上位机，运用编程电控等技术，可提前设置种子包衣参数，精准控制各部分，对供种量、供粉量以及供液量实现精准供给以及分批次供粉供液，极大提高了操作系统的自动化和智能化，提高了包衣效率的同时，降低了多籽率和无籽率，提高单籽率及包衣合格率。为提高包衣品质和包衣机的供给精度，分别对供种系统、供粉系统以及供液系统进行误差分析以及校准试验，经试验验证，供给误差控制在2%以内，满足精准供给的需求。试验结果表明：通过新型旋转式包衣机包衣的种子相比于传统人工添料包衣的种子包衣合格率提升15%到20%。