Loading patent…
AssigneeHitachi High-Tech Corporation
InventorsMasuyoshi YAMADA, Kosuke OHIRO
Estimating the term…
There is provided a photoacoustic measurement device including: a first acoustic cell configured to measure an external noise sound; a second acoustic cell configured to measure a reference sample by irradiating the reference sample with light of a first frequency modulated by a first frequency modulator; a third acoustic cell configured to measure an observation sample by irradiating the observation sample with light of a second frequency modulated by a second frequency modulator; and a processor configured to analyze acoustic wave data measured by the first acoustic cell, the second acoustic cell, and the third acoustic cell. The processor performs frequency analysis on the external noise sound, outputs a result obtained by setting, as the first frequency, a frequency having a low noise sound level among a result of the frequency analysis, modulating the first frequency with the first frequency modulator, measuring the reference sample with the second acoustic cell, analyzing a signal variation and a noise level variation of the reference sample to calculate a component determination threshold for the observation sample, and determining a component of the observation sample using the component determination threshold, causes the second frequency modulator to modulate the second frequency, which is different from the first frequency, and causes the third acoustic cell to measure the observation sample in parallel with the measurement of the reference sample, and changes, when the noise sound level of the second frequency is high in the result of the frequency analysis, the second frequency to the first frequency to measure the observation sample with the third acoustic cell.
A photoacoustic measurement device comprising:
A photoacoustic measurement device comprising:
A photoacoustic measurement method comprising:
Dependencies are inferred from the claim text.