Automatic industrial cross-correlator for flow measurement

Jun Chen (Corresponding Author), Jouni Tornberg, Jari Kivimaa, Matti Karras

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The cross-correlation flow measurement technique is a promising method in the two phase flow measurement field. Further research is conducting to utilize this technique in the measurement in paper industry. Emphasis is placed on the design of the polarity correlator for flow measurement, the accuracy of metering and the analysis of correlator characteristics. The paper presents a state-sequenced polarity structure of the simple digital correlator with variable length pre-delay based on a sophisticated microprocessor. The dynamic data tracking feature automatically adjusts clock of the hardware and time constant to compensate for rapid fluctuations in flow rate. The variable length pre-delay expands the flow velocity range to be measured and saves the calculation time. Finally the paper also presents the test that the ultrasonic flowmeter including an ultrasonic flowmeter including an ultrasonic double sensor and the correlator operated in a 33.7 mm diameter tube in which pulp suspension was flowing. The experiment indicates that the cross-correlation velocity is linearly proportional to the reference flow velocity measured by magnetic flowmeter. All the designed automatic features operated satisfactorily.
Original languageEnglish
Pages (from-to)171-179
Number of pages9
JournalISA Transactions
Volume33
Issue number2
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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Flow Measurement
Correlators
flow measurement
Correlator
Flow measurement
correlators
flowmeters
Ultrasonic flowmeters
flow velocity
ultrasonics
Polarity
Cross-correlation
Flow velocity
cross correlation
polarity
Magnetic flowmeters
Feature Tracking
Phase Measurement
Phase measurement
Measurement Techniques

Cite this

Chen, Jun ; Tornberg, Jouni ; Kivimaa, Jari ; Karras, Matti. / Automatic industrial cross-correlator for flow measurement. In: ISA Transactions. 1994 ; Vol. 33, No. 2. pp. 171-179.
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title = "Automatic industrial cross-correlator for flow measurement",
abstract = "The cross-correlation flow measurement technique is a promising method in the two phase flow measurement field. Further research is conducting to utilize this technique in the measurement in paper industry. Emphasis is placed on the design of the polarity correlator for flow measurement, the accuracy of metering and the analysis of correlator characteristics. The paper presents a state-sequenced polarity structure of the simple digital correlator with variable length pre-delay based on a sophisticated microprocessor. The dynamic data tracking feature automatically adjusts clock of the hardware and time constant to compensate for rapid fluctuations in flow rate. The variable length pre-delay expands the flow velocity range to be measured and saves the calculation time. Finally the paper also presents the test that the ultrasonic flowmeter including an ultrasonic flowmeter including an ultrasonic double sensor and the correlator operated in a 33.7 mm diameter tube in which pulp suspension was flowing. The experiment indicates that the cross-correlation velocity is linearly proportional to the reference flow velocity measured by magnetic flowmeter. All the designed automatic features operated satisfactorily.",
author = "Jun Chen and Jouni Tornberg and Jari Kivimaa and Matti Karras",
year = "1994",
doi = "10.1016/0019-0578(94)90050-7",
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Chen, J, Tornberg, J, Kivimaa, J & Karras, M 1994, 'Automatic industrial cross-correlator for flow measurement', ISA Transactions, vol. 33, no. 2, pp. 171-179. https://doi.org/10.1016/0019-0578(94)90050-7

Automatic industrial cross-correlator for flow measurement. / Chen, Jun (Corresponding Author); Tornberg, Jouni; Kivimaa, Jari; Karras, Matti.

In: ISA Transactions, Vol. 33, No. 2, 1994, p. 171-179.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Karras, Matti

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AB - The cross-correlation flow measurement technique is a promising method in the two phase flow measurement field. Further research is conducting to utilize this technique in the measurement in paper industry. Emphasis is placed on the design of the polarity correlator for flow measurement, the accuracy of metering and the analysis of correlator characteristics. The paper presents a state-sequenced polarity structure of the simple digital correlator with variable length pre-delay based on a sophisticated microprocessor. The dynamic data tracking feature automatically adjusts clock of the hardware and time constant to compensate for rapid fluctuations in flow rate. The variable length pre-delay expands the flow velocity range to be measured and saves the calculation time. Finally the paper also presents the test that the ultrasonic flowmeter including an ultrasonic flowmeter including an ultrasonic double sensor and the correlator operated in a 33.7 mm diameter tube in which pulp suspension was flowing. The experiment indicates that the cross-correlation velocity is linearly proportional to the reference flow velocity measured by magnetic flowmeter. All the designed automatic features operated satisfactorily.

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