一种新型波高测量系统的设计

Design of a New Wave Height Measurement System

波高测量是海洋工程模型试验中的一项重要内容,为了能够准确、稳定地实时测量实验水池中的波浪,采用了一种新型的波高测量系统设计方法:首先利用液位高度与波高传感器电容量的线性关系将波高测量问题转化为电容量测量问题;其次利用波高传感器的电容量与其充放电时间的关系将波高传感器的电容量测量问题转化为充放电时间的检测问题;然后运用单片机片内模拟比较器和定时器的输入捕获功能将电容充放电时间转化为计数值;接下来将计数值通过USB接口送到上位机进行数据处理及波形显示;最后进行实验测试,实验结果表明所采用的波高测量方法是有效的,且具有线性度好、灵敏度高、精度高的优点。

Wave height measurement is an important content of ocean engineering model experiment.In order to accurately and stably measure the wave in the experimental pool in real time,a new design method of wave height measurement system is adopted.Firstly,the problem of wave height measurement is transformed into the problem of capacitance measurement by using the linear relationship between liquid level height and the capacitance of the wave height sensor.Secondly,the relationship between the capacitance of the wave height sensor and the charging and discharging time of the sensor is used to convert the capacitance measurement problem of the wave height sensor into a problem of detecting the charging and discharging time of the sensor.Then the charging and discharging time of the capacitor is converted into the count value by using analog comparator and the input capture function of the timer on the single chip microcomputer.Then the count value is sent to the upper computer through the USB interface for data processing and waveform display.The experimental results show that the adopted method is effective with the advantages of good linearity,high sensitivity and high precision.