Patent ID: 11885741
Assignee: YOKOGAWA ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An analysis device comprising:
a memory configured to store a calibration curve representing a relationship between a property value and an absorbance spectrum of sample gas, the calibration curve being generated from a measurement result of the absorbance spectrum of the sample gas obtained for each property value as a result of injecting the sample gas into a container, liquefying the sample gas in the container, measuring the absorbance spectrum of the sample gas in a liquefied state by a near-infrared measuring instrument via a near-infrared probe extending from inside to outside the container, and using a plurality of samples that differ in property value as the sample gas;
a meter configured to measure an absorbance spectrum of liquefied gas using near-infrared spectroscopy;
a controller configured to calculate a property value of the liquefied gas, from the calibration curve stored in the memory and a measurement result of the absorbance spectrum of the liquefied gas obtained by the meter; and
an input interface configured to receive input of a measurement result of a temperature of the liquefied gas,
wherein the memory is configured to store, as the calibration curve, a calibration curve representing a relationship among the property value, a temperature, and the absorbance spectrum of the sample gas, the calibration curve being generated from a measurement result of the absorbance spectrum of the sample gas obtained for each combination of the property value and the temperature as a result of measuring the temperature of the sample gas in the liquefied state, using the plurality of samples that differ in property value as the sample gas, and changing the temperature of the sample gas in the liquefied state, and
the controller is configured to calculate the property value of the liquefied gas, from the calibration curve stored in the memory, the measurement result of the temperature of the liquefied gas input in the input interface, and the measurement result of the absorbance spectrum of the liquefied gas obtained by the meter.