Bidirectional self-cleaning type optical fiber gas sensor probe

The invention discloses a bidirectional self-cleaning type optical fiber gas sensor probe. The bidirectional self-cleaning type optical fiber gas sensor probe comprises an optical fiber signal receiving-transmitting unit, an optical fiber signal reflection unit and a bidirectional blowing unit, wherein the optical fiber signal receiving-transmitting unit comprises an optical fiber set and a bidirectional light transmitting mirror; the optical fiber signal reflection unit comprises a reflection mirror and a reflection mirror cover; a certain focal length is kept between the bidirectional light transmitting mirror and the reflection mirror; the bidirectional blowing unit comprises a gas path connector connected with an external high-pressure gas source; the gas path connector is connected with a main body; the main body is provided with a self-cleaning gas path communicated with the gas path connector; the end face, facing the bidirectional light transmitting mirror, of the reflection mirror cover is in a circular-arc inclined plane structure; high-pressure gas is blown towards a mirror surface of the reflection mirror through the self-cleaning gas path; and after the gas is reflected by the circular-arc inclined plane structure of the reflection mirror cover, the gas is blown towards the mirror surface of the bidirectional light transmitting mirror. According to the bidirectional self-cleaning type optical fiber gas sensor probe, the bidirectional blowing unit is arranged so that the bidirectional self-cleaning type optical fiber gas sensor probe can be suitable for environment fields interfered by oil gas or water vapor and flying ash, and polluted environment fields, and the concentrations of different medium gases are detected.