目前大多数国家沿用的圆盘直机械范成的齿轮量仪,测量链较长,且结构复杂,在提高仪器的精度方面受到多种限制,难于适应近代工业提出的新的要求。七十年代以来,随着脉冲技术和电子计算机的发展,齿轮量仪有了新的突破。美国费洛公司提出了圆光栅—激光电子展成自动追踪原理,并设计试制成功齿轮测 At present, the disk gauge used by most of the disk-driven mechanical instruments in our country has a long measurement chain and a complex structure. It is subject to various limitations in improving the accuracy of the instrument and is difficult to meet the new requirements of modern industry. Since the seventies, with the pulse technology and the development of electronic computers, gear gauge has made new breakthroughs. The United States proposed a round of grating Polaroid - Laser Electronics Exhibition into the principle of automatic tracking, and the successful trial gear design test