英国约翰逊公司利用刻度转换系统和专门设计的集成电路制成一种称为 Jocal 的数字式电子卡尺,使读数时间减少一半,而读数范围却可扩大90%。测量结果显示在液晶显示器上,在整个量程上的分辨率为0.01毫米。该卡尺的大小与一般卡尺和千分尺差不 British Johnson uses a scale conversion system and a specially designed integrated circuit to create a digital electronic caliper called Jocal, reducing reading time by half while expanding the reading range by 90%. The measurement results show that on a liquid crystal display, the resolution over the entire range is 0.01 mm. The size of the caliper and the general difference between caliper and micrometer