双拖袋形排模运行阻力遥测联机处理系统

ON-LINE PROCESSING SYSTEM FOR REMOTE TESTING OF SAILING RESISTANCE TO DOUBLE-TOW BAG-RAFT MODEL

二滩水电站木材过坝机械试验表明，双船拖带袋形排是自水电站库区袋形排运输终点至坝前水流加速器加速区之间的木材短途运送较好的方式。本系统研制的目的是为了解决在自由航行状态下确定不同运木量其双拖袋形排模型运行速度与运行阻力之间的相关关系；预报实排拖曳有效功率；为将来实际双拖袋形排所用拖轮提供设计或选型依据。系统主要由遥测设备、拉力传感器、微机及计数器定时器接口电路组成。文中论述了遥测的基本原理、拉力传感器的制作方法、计数器定时器接口电路在系统中的主要作用。根据程序流程图对测试软件作了简要说明。总结了系统的５个特点：自动化程度和精度较高、具有一定的智能判断能力、软件优越、抗干扰性强和适用性广。

The experiment on dam-erasing machines of lop for the Ertun Hydropower Station indicates that the bsg-rafts towed by two abets is a better method for short distance transport Of logs from the end of bag-raft tow in the reservoir area of the hydropower station to the accelerating area of water flow accelerators in front of the dam. The system objectives are: 1) to find the correlstion between the speed of a double-tow bag-raft model and sailing resistance encountered with different volumes of logs under free-sailing condition; 2)to predict the effective power of real towing rafts; 3)to provide basis for the design or selection of tugboats fot actual double-tow beg-rafts. The system primarily consists of remote testing equipment, tension transducers, microcomputers and interfsce circuit for counter timers. The peper hss discuss the basic principle of remote testing, the manufacture of tension transducers, the major function of counter timers in the ststem. The software fot testing is briefly explained with the program flowchart. It is concluded that the system has five features:high automation and ascuracy, some intelligent judgement ability, superior software, strong anti-interference and high applicability.