Analyzes the principle errors in measuring small dimensions by Fraunhofer diffraction, including Fraunhofer approximation error and the place detecting error of extreme value characteristic aspect.
分析了用夫朗荷费衍射测量微小尺寸的原理误差，包括夫朗荷费近似误差和极值特征点位置探测误差。
It was proved in practical measurement experiments that the principle of measuring gear integrated error with a small pressure Angle measurement worm was correct and the technology was possible.
经过实际测量实验，证明了小齿形角工具蜗杆测量齿轮整体误差原理上的正确性，技术上的可行性，展示出此项新技术的潜在优势及应用前景。
Measuring the speed, range and the actual speed of the ship, the range of error was mainly due to the spread of ultrasound in the water caused by the change in speed, the error is relatively small.
测量的航速、航程与船舶实际的航速、航程存在的误差，主要是由于超声波在水中的传播速度发生变化引起的，误差相对较小。
应用推荐