By the introduction of cross - correlation technology and ultrasonic transducer , the ultrasonic flow measurement system can be developed , and the un - contact flow measurement of two - phase flow can be realized , therefore the research of the ultrasonic cross - correlation flowmeter is a subject that has great significance 以互相關(guān)技術(shù)為基礎(chǔ),采用超聲波換能器構(gòu)成超聲流量測(cè)量系統(tǒng),可以實(shí)現(xiàn)兩相流的非接觸測(cè)量,因而超聲相關(guān)流量計(jì)的研究是一項(xiàng)有重大意義的課題。
Based on the principle of the ultrasonic cross - correlation flowmeter , the key factor of the development of cross - correlation flowmeter , namely the design of cross - correlator , is analyzed in the paper . digital signal processing is introduced to design the flowmeter , the cross - correlation operation of random noise signal is dealt with inside the frequency field , and the digital cross - correlator is designed 本文從超聲相關(guān)流量計(jì)的工作原理出發(fā),分析了超聲相關(guān)流量計(jì)研制的關(guān)鍵因素,即相關(guān)器的設(shè)計(jì),并將數(shù)字信號(hào)處理技術(shù)引入了超聲相關(guān)流量計(jì)的設(shè)計(jì),在頻域內(nèi)對(duì)流動(dòng)隨機(jī)噪聲信號(hào)進(jìn)行相關(guān)處理,構(gòu)造了數(shù)字相關(guān)器。