| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a microwave-type densitometer capable of reducing a measuring error even if a liquid temperature suddenly changes without providing a new receiving antenna or a thermostatic control part covering the periphery of transmitting and receiving antennae, and a liquid temperature correcting method thereof. <P>SOLUTION: The microwave-type densitometer for measuring the concentration of a liquid to be measured is equipped with a temperature correcting arithmetic part which measures the liquid temperature t2 of the liquid to be measured, calculates a liquid temperature correcting value used for correcting the phase difference Δθ on the basis of the temperature difference Δt (=t2-t1) with the preliminarily measured liquid temperature t1 of the liquid containing no substance to be measured, further measures the antenna temperature ta of either one of the transmitting and receiving antennae, calculates the temperature difference between the liquid temperature t2 and the antenna temperature ta to calculate a phase difference correcting liquid temperature-antenna temperature difference correction value, and corrects the phase difference Δθ from the liquid temperature correction value and the liquid temperature-antenna temperature difference correction value to calculate the concentration of the liquid to be measured. <P>COPYRIGHT: (C)2010,JPO&INPIT |
