CAJ | 학술논문

不分光红外气体传感器输入和输出关系在本质上是非线性的,需要校正,以保证系统的测量精度。根据气体对红外光线的吸收定律,对传感器进行定性分析,得到数学模型结构,并研制了基于DSP的硬件平台和软件算法。随后进行了标定试验,通过试验数据,建立传感器输入与输出的非线性关系。对非线性参数进行优化,建立满足精度和实际应用需要的数学模型,确定浓度与信号幅值的关系。试验结果表明,通过该数学模型的非线性校正,使得系统的非线性误差小于±1%FS,满足实际测量的要求。
불분광홍외기체전감기수입화수출관계재본질상시비선성적,수요교정,이보증계통적측량정도。근거기체대홍외광선적흡수정률,대전감기진행정성분석,득도수학모형결구,병연제료기우DSP적경건평태화연건산법。수후진행료표정시험,통과시험수거,건립전감기수입여수출적비선성관계。대비선성삼수진행우화,건립만족정도화실제응용수요적수학모형,학정농도여신호폭치적관계。시험결과표명,통과해수학모형적비선성교정,사득계통적비선성오차소우±1%FS,만족실제측량적요구。
The relationship between input and output of non-dispersive infrared gas sensor is nonlinear in nature, and need to be corrected to ensure the measurement accuracy of the system. According to the absorption raw of gas to IR light, qualitative analysis is conducted for the sensor, and the mathematical model structure is obtained. The hardware platform based on DSP and the software algorithm are researched and developed, and the calibration test is conducted; through the test data, the nonlinear relationship between output and output of the sensor is built. The parameters of the nonlinear relationship are optimized, the mathematical model satisfying accuracy and the demand for practical application is established, to determine the relation between concentration and signal amplitude. The result of experiments indicate that the nonlinear correction made by the mathematical model makes the nonlinear error less than ±1%FS, that meets the requirement of practical measurement.