Automobile exhaust remote sensing detection system and method based on quantum cascade laser

The invention discloses an automobile exhaust remote sensing detection system and a method based on a quantum cascade laser. According to the invention, a signal generated by any function generator is input into a laser current pulse driving module; the quantum cascade laser is driven by the laser current pulse driving module to generate intermediate-infrared or far-infrared laser; a modulation signal is obtained through a chopper after the intermediate-infrared or far-infrared laser passes through an automobile exhaust emission area; a pyroelectric sensor module detects the modulated intermediate-infrared or far-infrared laser signal, and then inputs the detected signal into a lock-in amplifier for operation; the lock-in amplifier outputs the data into a computer; and the computer calculates the contents of different emission products in the automobile exhaust through a data processing method analysis method.