Photoacoustic wave measurement device and photoacoustic wave measurement system
AssigneeToyama Prefectural University
InventorsIsao SHIMOYAMA, Kentaro NODA, Takuya TSUKAGOSHI
Life of this patent
Estimating the term…
Abstract
A photoacoustic wave measurement device includes a modulated light source that irradiates a measurement target with far-infrared light, which is subjected to intensity modulation; and a measurement unit that measures a photoacoustic wave emitted from the measurement target irradiated with the far-infrared light. The measurement unit includes an airtight chamber that is filled with a gas therein and receives the photoacoustic wave emitted from the measurement target; and a pressure sensor constituting a part of a wall portion that partitions the airtight chamber from the outside.
Claims16
A photoacoustic wave measurement device comprising:
- a modulated light source that irradiates a measurement target with far-infrared light which is subjected to intensity modulation;
- and
- a measurement unit that measures a photoacoustic wave emitted from the measurement target irradiated with the far-infrared light, wherein
- the measurement unit includes:
- an airtight chamber that is filled with a gas therein and receives the photoacoustic wave emitted from the measurement target;
- and
- a pressure sensor constituting a part of a wall portion that partitions the airtight chamber from the outside.
A photoacoustic wave measurement system comprising:
- a modulated light source that irradiates a measurement target with far-infrared light which is subjected to intensity modulation;
- a measurement unit that measures a photoacoustic wave emitted from the measurement target irradiated with the far-infrared light;
- and
- a controller that controls the modulated light source and the measurement unit, wherein
- the measurement unit includes:
- an airtight chamber that is filled with a gas therein and receives the photoacoustic wave emitted from the measurement target;
- and
- a pressure sensor constituting a part of a wall portion that partitions the airtight chamber from the outside, and
- the controller
- irradiates the modulated light source with the far-infrared light which is subjected to the intensity modulation,
- acquires a pressure change in the airtight chamber by the pressure sensor, and
- calculates a concentration of a predetermined component in the measurement target according to the pressure change acquired by the pressure sensor.
Dependencies are inferred from the claim text.