基于超声波相位差的氢气检测方法及仪器研制

Hydrogen Detection Method Based on Ultrasonic Phase Difference Method and the Development of the Instrument

针对现有氢气检测技术存在的问题,提出了超声波相位差氢气检测法。该方法依据氢气声速与其他气体声速有显著差别而设计,采用双通道设计,巧妙地将超声波速度差转化为相位差,用测得的相位差变化来反映气体浓度的变化,提高了测量精度,同时采用数字温度传感器进行环境温度补偿,扩大了传感器的工作温度范围。实验结果表明本测量方法氢气测量相对误差小于2%,符合相关国家标准要求,实现了氢气快速、高精度、低功耗、低成本检测,具有较高的理论意义和应用价值。

This article aimed at the current problem of hydrogen gas detection technology put forward a detection of ultrasonic phase difference. This detection design according to the different sound speed from hydrogen and other gas,utilize dual-channel design,skillfully converted ultrasound velocity into phase difference,phase difference change measured to reflect changes in gas concentration,improve the measurement accuracy,and using digital temperature sensor recompense temperature, expanded operating temperature range of the sensor.Experimental results show that the measurement method to achieve a hydrogen fast,high-precision,low-power,low-cost testing,has a high theoretical and practical value.