Device and method for measuring micro impulse by torsional pendulum method for modulating multi-beam laser heterodyne by using doppler galvanometer sine

• Main Authors: WANG CHUNHUI, GAO LONG, CONG HAIFANG, SHAO WENMIAN, LI YANCHAO, QU YANG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2012
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The invention relates to a device and a method for measuring a micro impulse by a torsional pendulum method for modulating multi-beam laser heterodyne by using doppler galvanometer sine, and belongs to the technical field of micro impulse measurement. By the device and the method, the problem that the measurement precision of parameter values to be measured is low because only one single parameter value to be measured can be acquired by the conventional heterodyne interference method for measuring the micro impulse of a micro thrustor is solved. The device consists of a digital signal processing system, a photoelectric detector, a pulse laser device, a torsional pendulum system, an H0 solid laser device, a polarization beam splitter (PBS), a quarter wave plate, a galvanometer, a plane standard lens and a convergent lens. The method comprises the following steps of: switching on driving power supplies of the H0 solid laser device and the galvanometer; exciting a working medium target by using pulse laser emitt