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由于１０００℃以上的高温和含有飞灰等恶劣环境，使得锅炉炉膛内烟气流速的测量极其困难。采用能适应恶劣环境，且具有强抗干扰能力的互相关测量技术，研制了一套高温烟气流速测量装置。在高温烟气流动试验台架上进行流速测量试验。试验结果表明装置能较精确地测量烟气流速，一次相关测量时间小于３秒，有可能开发成为用于炉内高温烟气流速测量的实用仪器。装置采用微差压传感器提取上下游烟气压力脉动信号，经数据采集卡将信号输入ＰＣ机，由ＰＣ机对采集的随机压力脉动信号进行互相关计算，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。
Due to the high temperature above 1000 ℃ and harsh environments such as fly ash, the measurement of the flue gas velocity in the boiler hearth is extremely difficult. Using a cross-correlation measurement technology that can adapt to harsh environment and has strong anti-interference ability, a set of high-temperature flue gas flow measurement device has been developed. Flow rate test on high temperature flue gas flow test bench. The test results show that the device can accurately measure the flue gas flow rate, a relevant measurement time is less than 3 seconds, it is possible to develop into a practical instrument for high temperature flue gas flow velocity measurement furnace. The device uses the differential pressure sensor to extract the upstream and downstream flue gas pressure pulsation signals. The data is input into the PC through the data acquisition card, and the PC is used to calculate the cross-correlation of the collected pressure pulsation signals. The high temperature flue gas flows through the upstream and downstream sensors Of the transit time to calculate the flue gas flow rate.