High-temperature gas pressure measuring method

A high-temperature gas pressure measuring method, the method comprising:

• a pressure measuring gas housing dividing step for dividing a pressure measuring gas housing into a pressure measuring room and a pressure referring room by a metal diaphragm;
• a gas introducing step for introducing the high temperature gas into the pressure measuring room and introducing a reference pressure gas into the pressure referring room;
• a displacement measuring step for measuring a displacement of the metal diaphragm with a non-contact displacement sensor disposed in the pressure referring room, converting the displacement into an electrical signal, sending the signal, wherein the displacement occurs because of a difference in gas pressure between the pressure measuring room and the pressure referring room;
• and
• a pressure determining step for adjusting the gas pressure in the pressure referring room with a gas regulation module connected to the pressure referring room and controlled by a controller according to the displacement to equalize the adjusted gas pressure in the pressure referring room with the gas pressure in the pressure measuring room and measuring the adjusted gas pressure in the pressure referring room.