电子皮带秤在线远程自动校验与诊断系统的研究

Study on Electronic Belt Scale Online Remote Automatic Testing and Diagnosis System

目前电子皮带秤校验方法主要为实物校验和模拟载荷校验,但都不能消除皮带张力变化产生的误差,也无法"在线校验"。介绍了新型"电子皮带秤在线远程自动校验与诊断系统"的结构、原理及功能,其在校验过程中使用"双砝码"叠加,通过2个校验点以拟合称量的模拟线性,同时整圈双砝码累计叠加量可达到总累计量的50%而减小了校验误差;叠加量直接置于秤架上而排除了皮带机张力带来的影响;物料输送过程中的计量数据实时远传和皮带秤在线远程自动校验,大大减少了皮带秤校验和维护工作量。

Presently, the electronic belt scale testing is classified as material and simulation testing. However, these two methods can neither eliminate the errors caused by the belt tension changes nor conduct online testing. This paper introduces the structure, principle and functionalities of the electronic belt scale online remote automatic testing and diagnosis system. The system is based on double-weight supe^l~osition method, which adopts two testing points for the simulated linear fit of the belt scale, and simultaneously reduces the errors since the ratio of double weights to total load may reach as much as 50%. The overlaid weights which lay directly on the scale offset the effects brought about by the belt tension changes. The test data can be transmitted in real time during material conveying and the belt scale can also be cheeked both remotely and automatically, which significantly reduces the scale checking and maintenance workload.