大型潮汐河工模型适时加沙控制系统设计与应用

Design and application of auto-controlled sand-feeding system in large scale tidal model experiments

潮汐水流断面输沙率在潮周期过程中一直处于变化之中,在潮汐河工模型中进行精确加沙是一个难题。为提高加沙控制精度和自动化水平,在长江口深水航道三期工程航道回淤预测河工模型上,设计开发了自动加沙控制系统。该系统以计算机控制技术为核心,辅以机电技术和管道结构设计,实现了对整个试验过程的适时加沙控制,能够适应潮汐水流要求加沙适时变化的特点。实际应用后,效果良好,具有推广价值。

In general, the sand-feeding for making suspended sediments at the inlet in the river model has been controlled manually for many＂ years. In order to make sand-feeding more accurate and efficient, an auto-controlled sand-feeding system for the tidal model of the Changjiang Estuary is developed. The system is supported by a computer, with the help of some machineries, motor sand valves etc.. Real time sand-feeding can be carried out in the whole experiment process. The system is working well and can be used in other similar models.