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林浩; 李恩; 梁自泽; 翟波
Source Publication煤炭学报
光干涉甲烷检测器具有稳定可靠性强、测量范围宽等优点,但现有设备都采用人工读数方式,自动化程度低,不能连接到煤矿监控系统。针对该问题,提出了一种基于测量干涉条纹光强的改进方法。通过改进光路设计,保证了甲烷体积分数与光强变化之间对应关系的惟一性。使用光电元件采集干涉条纹,根据干涉条纹的光强变化得到甲烷体积分数。针对光干涉甲烷检测器的零点受外界环境因素影响而发生漂移的问题,首先通过理论分析得到了外界气压与测量误差之间的关系模型,并使用该模型对外界气压变化进行补偿; 然后由实验得到温度与测量误差之间的关系,采用线性插值方法建立温度补偿模型。最后通过精度实验、压强实验、温度实验和长期稳定性实验
Other AbstractThe light interference methane detector has many advantages, such as good stability, wide measurement range, etc. However, the artificial reading and poor level of automation make it no communication with monitoring system. To solve this problem, we report an improvement based on measuring the intensity of interferogram. The optical configuration was modified to guarantee the one-to-one relationship between the intensity of interferogram and the methane volume fraction. We used photoelectric elements to capture the interferogram and calculated the methane volume fraction with the variation of the interferogram intensity. Given that the zero-drift error was affected by environmental factors, we modeled the relation between pressure and measurement error by theoretical analysis, which was used to compensate the measurement error. Then the relationship between temperature and measurement error was determined experimentally. And we obtained the temperature compensating model by linear interpolation. At last, the effectiveness of compensating models and the stability of the designed system were verified by accuracy test, pneumatic test, temperature test and long-term stability test.
Keyword甲烷检测器 光干涉法 气压补偿 温度补偿
Indexed ByEI
Document Type期刊论文
Corresponding Author林浩
Recommended Citation
GB/T 7714
林浩,李恩,梁自泽,等. 光干涉甲烷检测器的光路改进与零点补偿[J]. 煤炭学报,2015,40(1):218-225.
APA 林浩,李恩,梁自泽,&翟波.(2015).光干涉甲烷检测器的光路改进与零点补偿.煤炭学报,40(1),218-225.
MLA 林浩,et al."光干涉甲烷检测器的光路改进与零点补偿".煤炭学报 40.1(2015):218-225.
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