计程仪数据同步处理方法研究

为达到计程仪测量数据同步输出，针对其特点提出用计时器方法提高了采样速度的精度。在此基础上，对速度序列采用多项式平滑方法进行处理，降低了各种噪声对数据的影响，再次提高了实时速度的精度。通过对实测数据的验证，结果表明同点数次数越高的多项式平滑方法的误差越小。采用五点三次多项式平滑方法对一实测序列进行验证得到最大的速度误差为1．44kn。

Study of Method for Processing Log Data Synchronization

It uses the timer method to raise the precision of sampling speed to make the measuring data synchronization sending out in accordance with the characteristic of Log. Adopting the polynomial smooth method to deal with the speed alignment reduces the influence to the data of various noises and raises the precision of real-time speed once more on this foundation. By verifying the surveying data, the results show that the degree of polynomial is higher the error is smaller with the same points. It adopts smooth method of five points third-degree polynomial to verify an alignment and get the maximum speed error for 1.44kn.