On the basis of study on the burning characteristics of oxygen-poor fuel-rich propellant, such as frequency band and unsta-bility of burning acoustic signal, adopting the weak-signal testing circuit and computer, a new acoustic emission instrument for measuring burning rate of oxygen-poor fuel-rich propellant was developed. 通过研究贫氧推进剂的燃烧特性,主要是燃烧声信号的频带特性和不稳定特性,采用弱信号检测电路,并结合计算机技术,研制了用于贫氧推进剂燃速测试的新型声发射燃速仪。