针对样品煤粉末状的特点，提出了一种基于PLC 控制器的样品煤自动采样包装控制系统。实现了随机采样、自动称重、自动包装以及自动封口等工作过程的自动控制，具有浪费少、控制方便、自动零位整定和动态称量计量等功能,可用于各种粉末状、颗粒状等样品煤采样称重包装。系统在现场试验中的各项性能指标稳定、可靠。

An automatic control system of sampling package for sample coal was designed based on controller(PLC) according to the realities of sample coal powdery materials. The system can realize automatic control of random sampling, auto-weighting, auto-packaging, and auto-sealing off functions. It has the characteristics of less waste, convenient control, zero point self-tuning and dynamics weighing measurement. It can be used in sampling weighing package of sample coal. Various performance indicators were proved to stable and reliable by field test.