Optical gas sensor device, gas sensing method and storage medium

A gas sensing method used in an optical gas sensor device including,

• a light source that emits an infrared ray to a gas as a detection target;
• an optical filter that transmits the infrared ray with a wavelength corresponding to an absorption wavelength of the gas as the detection target;
• a light receiver that generates a detection signal by detecting the infrared ray incident through the optical filter;
• and
• a substrate on which the light source and the light receiver are mounted,
• the gas sensing method comprising:
• signal processing that intermittently drives and controls on and off of the light source, and calculates a gas concentration value of the gas as the detection target from a difference value acquired by subtracting a detection value of the detection signal when the light source is off from the detection value of the detection signal when the light source is on.

A non-transitory computer-readable storage medium having a program stored thereon for controlling a computer in an optical gas sensor device including,

• a light source that emits an infrared ray to a gas as a detection target;
• an optical filter that transmits the infrared ray with a wavelength corresponding to an absorption wavelength of the gas as the detection target;
• a light receiver that generates a detection signal by detecting the infrared ray incident through the optical filter;
• and
• a substrate on which the light source and the light receiver are mounted,
• the program controlling the computer to function as,
• a signal processor that intermittently drives and controls on and off of the light source, and calculates a gas concentration value of the gas as the detection target from a difference value acquired by subtracting a detection value of the detection signal when the light source is off from the detection value of the detection signal when the light source is on.