摘要
由于拖曳线列阵很长，工作频率很低，用常规的自由场方法是很难对其进行校准的。本文提出了一种在密闭管中测量线阵的自由场复数灵敏度和指向性图的方法。已经开发了一个初型校准系统，系统的频率范围从２０Ｈｚ到６００Ｈｚ，管中所得的测量结果与理论曲线符合很好。因此，线列阵管中校准方法是一种在低频情况下校准线列阵的十分有效的方法。
It would be very difficult to calibrate towed-line array using the general free-field calibration technique due to its long length and low working frequency. In this paper a closed-chamber technique for measuring the complex free-field sensitivity and directivity patterns of line array is described. A prototype calibration system has been developed. The system can operate over the frequency range from 20 to 600 Hz. The measurement results obtained in the chamber have shown in a good agreement with the theoretical predicted curves. Obviously, the technique is a very efficient method to calibrate line array in low frequency.
出处
《计量学报》
CSCD
北大核心
1998年第2期106-111,共6页
Acta Metrologica Sinica
