基于MEMS加速度计的波高测量装置

利用加速度计浮标对海洋特定的参数波高进行监测。加速度计浮标运用三轴加速度计、陀螺仪、强磁场计以及电磁罗盘模块作为核心电路,利用惯性导航原理,采用四元素法进行坐标转换,并用低通滤波算法对采集信号进行处理,将滤波后的信号值进行二次积分可获取轴向位移,其中Z向位移用来计算波高,同时运用倾角测量原理计算上跨零点处浮标与水平面倾角,并用电子罗盘进行校正,以此来判断波向的方法。使用该波高测量装置对一系列波浪进行测量,并与电容波高传感器进行对比,实验结果表明:运用加速度计浮标测得竖直方向位移曲线,与电容式波高传感器实测曲线相比一致性较好,针对测量结果进行对比发现频域内分析方法误差更小。因此基于陀螺仪和加速度计的波浪观测装置能够满足波浪实验测量需求。

Wave Height Measuring Device Based on Gyroscope and Accelerometer

Accelerometer buoys are used to monitor ocean-specific parameter wave heights. The accelerometer buoy uses a three-axis accelerometer, a gyroscope, a strong magnetic field meter and an electromagnetic compass module as the core circuit. Using the inertial navigation principle, the four-element method is used for coordinate conversion, and the low-pass filtering algorithm is used to process the acquired signal. The axial value can be obtained by quadratic integration of the signal value. The Z-direction displacement is used to calculate the wave height. At the same time, the inclination angle of the buoy and the horizontal plane at the upper zero point is calculated by the inclination measurement principle, and the electronic compass is used for correction to determine the wave direction. method. The wave height measuring device is used to measure a series of waves and compared with the capacitance wave height sensor. The experimental results show that the vertical displacement curve is measured by the accelerometer buoy, which is consistent with the measured curve of the capacitive wave height sensor. The comparison of the measurement results shows that the error in the analysis method in the frequency domain is smaller. Therefore, wave observation devices based on gyroscopes and accelerometers meet the needs of wave experimental measurements.