RAMSoft II: A computer‐based room acoustics measurement system

Based on laboratory trials on the optimal flocculating point, in which the variation of this command variable of the juice purification was demonstrated, a prototype for the automated determination was constructed. A measurement system, which is operated in the bypass of the industrial production, is used for an automatic stepwise carbonatation of main liming juice. Starting at pH = 11.2 carbonatation gas is injected to bring down the pH to 10.4 in 0.1 or 0.2 pH units per step. After every pH step, the sedimentation behavior of the juice is characterized by means of a turbidity measurement after a clarification time of 3.5 min. With the function of turbidity versus pH value the optimal end point of the1st carbonatation can be determined. All in all an analysis takes approximately 60 min. Afterwards, an automated cleaning step takes place. For the prototype, the control of every step as well as the interpretation of the results is carried out with a personal computer. Based on the good experiences a so-called industrial version of this measurement system was constructed.

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A computer-based temperature measurement system

Computers & Chemistry ◽

10.1016/0097-8485(88)80004-4 ◽

1988 ◽

Vol 12 (4) ◽

pp. 301-304 ◽

Cited By ~ 1

Author(s):

F.T. Chau ◽

K.D. Chan

Keyword(s):

Temperature Measurement ◽

Measurement System ◽

Computer Based ◽

Temperature Measurement System

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A Novel Method for Investigating the Frequency Dependent Behavior of Instrument Transformers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.494-495.1477 ◽

2014 ◽

Vol 494-495 ◽

pp. 1477-1481

Author(s):

Yong Xin Feng ◽

Zhao Li ◽

Ya Qi Gao ◽

Bing Ran Shao ◽

Xue Wen Ding ◽

...

Keyword(s):

Measurement System ◽

Current Transformers ◽

Frequency Dependent ◽

Frequency Responses ◽

System A ◽

Dependent Behavior ◽

Instrument Transformers ◽

Computer Based ◽

Novel Method ◽

High Voltage System

This paper describes the structure and the principle of the NI DAQ based measurement system used for investigating the frequency dependent behavior of instrument transformers in the high voltage system. A computer based NI DAQ card is utilized as the data acquisition system in the new measurement system. The software digital filter and the phase locked loop are implemented to obtain the magnitude and phase angle, respectively. With this measurement system, we investigated frequency responses of several voltage and current transformers at the converter station of the Germany railway.

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