Temperature measurement method based on laser deflection induced by ultrasonic pulse

A temperature measurement method based on a laser deflection induced by an ultrasonic pulse, comprising the following steps:

• S1, emitting a continuous laser beam by a continuous laser, and collimating the laser beam by a collimator;
• S2, passing the laser beam through a high-temperature gas to be measured, and reflecting the laser beam into the high-temperature gas to be measured again by a high reflectivity mirror outside a measurement area;
• S3, folding back and passing the laser beam through the high-temperature gas to be measured again, and receiving the laser beam by a quadrant photodiode;
• S4, arranging a pulse ultrasonic generator in a vertical direction of the laser beam, and carrying out a control by an ultrasonic generator control box;
• S5, passing an ultrasonic successively through the laser beams at different distances from the pulse ultrasonic generator, and obtaining a generated deflection position information of the laser beams by the quadrant photodiode, and performing a high-speed acquisition and real-time storage of a voltage signal of the quadrant photodiode by a high-speed acquisition card and a computer;
• S6, analyzing the voltage signal of the quadrant photodiode obtained by the step S5 to obtain a temperature information.