压电式压力传感器的光纤传输技术应用研究

Applied study on fiber-optic transmission of piezoelectric pressure sensor

压力是内弹道的基本指标,压力随时间变化的曲线可以表征内弹道的情况。提高压力测量的精度,能够促进内弹道理论研究。电热炮发射试验的电磁环境复杂,对膛压测量影响很大。采用电磁屏蔽和数字光纤传输技术等措施,不但较好地解决电磁干扰难题,并将等离子体负载电压和电流、身管膛内压力、炮口压力和测量炮口速度的区截装置等信号统一在一个时间轴上,为电热炮的等离子体点火、增强作用的理论研究找到可行的试验方法。

Because the pressure is a key feature of the internal ballistic inside, change curve of the pressure with time can show the circumstance of internal ballistic inside. Increasing the pressure measurement accuracy, it can promote the research of the internal ballistic theories. There is an electromagnetic environment when the electro- thermal chemical gun （ETCG） is launched. The electromagnetic interference （EMI）brought some problems to measure the ETCG bore pressure. So the electromagnetism shield and the digital fiber-optic transmission technique are adopted, which resolved the difficult question goodly. At the same time, it can display the voltage and current of the plasma load,the ETCG bore pressure, ETCG muzzle pressure, and the signal of the ETCG muzzle speed in unifying on the same time stalk. It finds out the viable experiment method to research the theories of ETCG plasma electricity fire and electricity enhance function.