【摘要】 开发了一套新型的三探头单纤光导探针测量系统，用于测量二维气泡速度。传感部件为光导探针，探针由平面分布的３个探头组成。在光路设计上，用光分路器取代传统的分光镜，使探针光路简单、易于调节，同时使系统紧凑、经济。针对二维气泡运动的特点，开发了无相关信号剔除算法和相关分析数据处理方法，用来计算气泡速度大小和方向角。用本系统测量气泡自由上升运动的速度，并与经验关系式计算结果相比较，二者的偏差在±３０％之内，说明本系统的测量结果具有一定精度更多还原

【Abstract】 An advanced measuring system with tri fiber optical probe has been developed to measure two dimensional bubble velocity. To keep the optical circuit simple and easy to be adjusted and make the system compact and economical, optical couplings are used instead of beam splitting lens which are conventionally used in optical circuit of single fiber optical probes. In accordance with 2D bubble movement, relevant data analysis of cross correlation is presented. In the data analysis the technique to reject the signals of the incorrelative bubbles detected by the tri fiber optical probe has been developed. The measuring system has been used to measure the velocity of the air bubbles in free upward flow . The measured results and the calculated ones by empirical correlation agree within ±30%.更多还原