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| Application in Acoustic Pyrometer System Based on Generalized Cepstrum Correlation Algorithm |
| LI Cheng-zhi1,SHAO Fu-qun2,KAN Zhe3 |
1. Beijing Pulimen Electronic Science & Technology Co LTD, Beijing 100041, China;
2. College of Information Science and Engineering, Northeast University, Shenyang, Liaoning 110006, China;
3. Liaoning Petrochemical University, Fushun, Liaoning 113001, China |
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Abstract The method of temperature measurement by acoustic pyrometers is based on the combination of acoustic wave and CT technique,and the accurate measurement of acoustic wave time of flight is the key link in its application.In the complex reverberation background condition,the traditional correlation algorithm could not overcome convolution interference, it may cause the multi-correlation peak values.In the application of acoustic pyrometer system,the generalized cepstrum correlation algorithm can transform the product and convolution homomorphism system to linear system by using cepstrum operation,thereby,this algorithm can separate product signals or convolution signals,filter the product and convolution interferences.The experimental result and theory proved that,compared to the traditional correlation function analytical algorithm,the new cepstrum algorithm can overcome the convolution interferences from reverberation,and sharpen peak value,thereby estimate the time delays of signals.
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2013, Vol. 34 
