基于MEMS惯性传感器的波浪测量系统设计与实现

波浪测量系统能够在固定海域、全天候、全天时地自动监测海洋的波高、周期和波向。设计了基于STM32F429处理器和MTI-3-8A7G6T惯性传感器的波浪测量系统。完成波浪测量系统的算法及软件设计，其中波高和波周期的测量采用在频域内对加速度进行二次积分，可以有效避免直流分量对积分结果的影响，同时在频域内进行数字滤波，滤除加速度计零偏误差和低频随机噪声；波向的测量是利用水平合成加速度与磁航向的夹角获得。通过软件设计将测波算法成功移植到STM32F429处理器中，实现波浪测量功能。经实验验证，针对不同波高和波周期的波浪，波浪测量系统的测量误差都在规定范围内。系统对波浪特征值解算准确，长时间运行稳定，满足高精度和高可靠性的测量要求。

Design and implementation of wave measurement system based on MEMS inertial sensor

The wave measurement system can automatically monitor the wave height, period and direction of the ocean in a fixed area, all weather and all day. A wave measurement system based on STM32F429 processor and MTI-3-8A7G6T inertial sensor is designed. The algorithm and software design of the wave measurement system were completed, in which the wave height and wave period were measured by integrating the acceleration twice in the frequency domain, which could effectively avoid the influence of the DC component on the integral result. Meanwhile, the digital filtering was carried out in the frequency domain to filter out the zero deviation error of the accelerometer and the random noise of low frequency. The measurement of wave direction is obtained from the Angle between horizontal resultant acceleration and magnetic heading. The wave measurement algorithm is successfully transplanted into STM32F429 processor through software design to realize the wave measurement function. Experimental results show that the measurement errors of the wave measurement system are within the specified range for waves with different wave heights and wave periods. The system can solve the wave characteristic value accurately. run stably for a long time. and meet the requirements of high precision and high reliability.