Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

Table 1

Mapping table of methane concentration and output voltage of the photoelectric detector.

Output voltage (V)	Simulated concentration value (%)	Pressure difference (kPa)
1.650	−10.0	5.18
1.713	−8.0	4.144
1.796	−6.0	3.108
1.895	−4.0	2.072
2.007	−2.0	1.036
2.131	0.0	0.0
2.263	2.0	−1.036
2.397	4.0	−2.072
2.533	6.0	−3.108
2.667	8.0	−4.144
2.793	10.0	−5.18
2.910	12.0	−6.216
3.015	14.0	−7.252
3.103	16.0	−8.288
3.171	18.0	−9.324
3.220	20.0	−10.36