Dynamic calibration system for microsecond pressure sensor based on laser-induced cavitation

• Main Authors: ZHANG XUENING, GUO LUYAO, ZHANG JINGHAO, DU PENGFEI, TU CHENGXU, CHEN JI, CHEN ZEWU, XIA XUFENG, KAN MENGWEN, BAO FUBING, ZHAO YALEI
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The invention discloses a dynamic calibration system for a microsecond pressure sensor based on laser-induced cavitation. A digital time-delay trigger triggers a pulse laser, pulse laser emitted by the pulse laser is focused at a specified position near a pressure sensing surface of a sensor to be calibrated in water, and cavitation bubbles are generated; standard pressure waves generated by collapse of the cavitation bubbles act on the pressure sensing surface of the pressure sensor, and the dynamic pressure acquisition device acquires output signals of the pressure sensor to obtain response waveforms of the pressure sensor. According to the pressure value of the standard pressure wave response curve at the peak moment and the pressure value of the sensor at the peak moment, pressure amplitude errors are obtained, and the maximum value of the amplitude errors is taken to complete dynamic calibration of the pressure sensor. According to the invention, laser is utilized to generate cavitation bubbles with cont