美国依利诺斯州MEA公司研制成功了一种新的非接触式长度测量装置,从1982年起开始推广使用。该装置首先用在带材卷取过程中连续测量卷材的直径和长度,测量精度可达±0.2％(以往采用机械式测量仪表,精度仅为±1％)。这给按带卷直径供货的生产厂家带来了很高的经济效益。 该装置如图1,主要由激光测距仪、脉冲式转数汁和MEA过程计算机三部分组成。 MEA, Illinois, USA, has developed a new non-contact length measuring device that has been in commercial use since 1982. The device is used to continuously measure the diameter and length of the web during the strip take-up process. The measurement accuracy is up to ± 0.2% (compared to ± 1% in the past with mechanical measuring instruments). This brings great economic benefits to the manufacturer supplied by the coil diameter. The device shown in Figure 1, mainly by the laser range finder, pulse-speed juice and MEA process computer three parts.