The error analysis shows that the measurement error is caused by the noise of the accelerometer, discrete double integration, noise of beacon and frequency characteristic error.
对线加速度计辅助惯性姿态角测量的误差分析表明，测量误差由加速度计噪声、二次积分离散化、信标噪声和加速度计频率特性误差组成。
The edge transition of pulses from incremental encoder can be detected with double frequency to improve measurement precision, and to avoid measurement errors and accumulative errors.
汉字和图形相结合。 对增量编码器的脉冲信号沿变化进行倍频检测，提高分辨精度，避免计数误差和累积误差。
In the light of the performance features of KNUDSEN 320M detector, this paper analyzes on the application of double frequency detector in the water-depth measurement.
针对KNUDSEN 320M型测深仪的性能特点，介绍了双频测深仪在水深测量中的应用。
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