摘要
应用抗干扰能力强和适应恶劣环境的相关测量技术，研制了一套相关流速测量系统，对管道内的高温烟气流速进行了在线测量。该系统利用微压传感器获取烟气压力脉动信号，高性能数据采集卡进行数据采集和Ａ／Ｄ转换，在ＰＣ机上编制软件，对高温烟气的压力脉动信号进行互相关处理，求得高温烟气流经上、下游传感器的渡越时间，从而计算出烟气流速值。实验结果证明，该系统能较准确地连续测量锅炉内高温烟气的流速，有可能开发成为一种实用的测量装置。
Abstract In view of current situation, by cross correlation measurement techniques, which have advantage of strong ability to resist interference and to adapt adverse circumstance, a set of cross correlation system for velocity measurement is researched to conduct in line measurement of high temperature flue gas velocity in the pipeline. In this system, two identical micro pressure transducers are used to capture pulsating pressure signals of flue gas, PCL 818L high performance DAS is used to acquire data and complete A/D conversion and solftware system compiled on the personal computer is used to accomlish in line digital signals processing. Consequently, the transit time of signals passing through upstream and downstream transducers can be obtained to calculate the flue gas velocity, by cross correlation calculation for pulsating pressure signals of flue gas. According to the results of the experiments, this cross correlation measurement device can measure in line flue gas velocity accuractely and is very likely to turn into a practical measurement device. Figs 7, table 1 and refs 4.
出处
《动力工程》
CSCD
1998年第6期55-59,共5页
Power Engineering
基金
国家自然科学基金
