基于超声波振动传递的全量程氢气浓度检测方法

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (15) : 83-89.

论文

孙慧1 ，孙凯2，施云波1，丁欣1，丁喜波1

作者信息 +

Full range hydrogen concentration detection method based on ultrasonic vibration transmission

SUN Hui1, SUN Kai2, SHI Yunbo1, DING Xin1, DING Xibo1

Author information +

文章历史 +

摘要

利用超声波振动传递相位差检测技术可在恶劣环境下实现高准确性、低成本氢气浓度检测。当氢气浓度变化较大时被测相位差会出现跨越多周期现象，传统超声波相位检测技术只能检测出单周期2内相位变化，针对此问题本文提出一种运用多频超声波相位差检测技术实现氢气浓度检测方法，加载多频信号获得低频包络信号相位差，结合高频信号单周期相位差求得跨周期总相位差，解决了超声波相位差大于2后出现相位差跨周期无法检测的问题，实现了基于超声波振动传递的从低浓度到高浓度直至全量程氢气浓度检测。本文所述方法实现了低功耗，高精度气体浓度检测，经实验证明，本方法实现氢气在4%浓度以下测量相对误差小于2.1%，90%浓度测量相对误差小于8%
关键词：相位差测量；氢气浓度测量；超声波振动；跨周期检测

Abstract

Using ultrasonic phase difference of vibration transmission detection technology can achieve high accuracy and low cost hydrogen concentration detection in harsh environment. When the hydrogen concentration changes greatly, the measured phase difference will cross more cycles. The traditional ultrasonic phase detection technology can only detect the phase change within 2π of a single period. To solve this problem, this paper proposes a multi-frequency ultrasonic phase difference method to realize hydrogen detection. By loading multi-frequency signal to obtain the phase difference of low-frequency envelope signal, and combining with the single period phase difference of high-frequency signal, the total phase difference across the cycle is obtained, which solves the problem that the cross-cycle phase difference cannot be detected when the ultrasonic phase difference is greater than 2π, and realizes the hydrogen concentration detection from low concentration to high concentration to full range based on ultrasonic vibration transmission technology. The experimental results show that the relative error is less than 2.1% when the concentration of hydrogen is below 4%, and the relative error is less than 8% when the concentration of 90%.
Key words: phase difference measurement; hydrogen concentration measurement; ultrasonic vibration; cross-period detection

导出引用

孙慧1,孙凯2，施云波1，丁欣1，丁喜波1. 基于超声波振动传递的全量程氢气浓度检测方法[J]. 振动与冲击, 2022, 41(15): 83-89

SUN Hui1, SUN Kai2, SHI Yunbo1, DING Xin1, DING Xibo1. Full range hydrogen concentration detection method based on ultrasonic vibration transmission[J]. Journal of Vibration and Shock, 2022, 41(15): 83-89

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