授时设备是现代舰船噪声综合测试系统的重要组成部分。本文提出一种LabVIEW平台下的授时设备IRIG-B码采集解析方法。首先利用授时设备产生的秒脉冲作为触发信号控制采集设备采集IRIG-B码，然后对IRIG-B码进行门限判别预处理，再与位置识别标志比对提取信号端点，最后将IRIG-B码与移位寄存器进行移位比对，识别码字以及解析时间信息。试验结果表明，该方法能够有效解决IRIG-B码实时采集解析问题，具有定时精度高、软件开销小、抗电磁干扰能力强等优点，可应用于授时设备的开发设计、工作状态监测、信号质量评估等。
Timing device plays an important role in modern comprehensive test system of ship noise measurement. A novel method of IRIG-B code acquisition and decoding based on LabVIEW is proposed. Firstly, using the pulse signal produced by timing equipment to control DAQ equipment. Then a threshold is introduced to the calculation of the starting points detection. Finally, the time information can be resolved by compare the IRIG-B code with shift register. Experimental results demonstrate that the proposed method is feasible to save the real-time acquisition and decoding of IRIG-B code, and especially it has a number of advantages, such as effectively improve the timing precision, decrease the software expense and overcome the electromagnetic interference. The proposed method possesses a prospective application in the area of timing device application system development, operating state monitoring, signal quality evaluation etc.
2017,39(9): 151-154 收稿日期：2017-02-09
DOI：10.3404/j.issn.1672-7649.2017.09.030
分类号：TP319
作者简介：张敬礼(1987-),男,硕士,工程师,研究方向为舰船辐射噪声测试及信号处理
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