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Proceedings Paper

The phase detection method in continuous monitoring of pH during the process of cell culture
Author(s): Zemin Liu; Wei Tao; Hui Zhao; Jinke Cheng
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Paper Abstract

The pH value has been one of the keen parameters in the cell culture. And the optical measurement method especially the optical method using optical fiber has been widely used due to its small volume and high accuracy. In this work we design a phase detection system to detect the phase difference between the signal and reference signal in the Dual Lifetime Referencing Method. The modulation frequency of the DLR method ranges from 10 kHz to 60 kHz and the system we designed can detect phase difference from the frequency of 1 kHz to 100 kHz. The error can be as small as 0.2%.

Paper Details

Date Published: 31 January 2013
PDF: 12 pages
Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 875924 (31 January 2013); doi: 10.1117/12.2014577
Show Author Affiliations
Zemin Liu, Shanghai Jiaotong Univ. (China)
Wei Tao, Shanghai Jiaotong Univ. (China)
Hui Zhao, Shanghai Jiaotong Univ. (China)
Jinke Cheng, Shanghai Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 8759:
Eighth International Symposium on Precision Engineering Measurement and Instrumentation
Jie Lin, Editor(s)

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