Title:
GAS CONCENTRATION DETECTION DEVICE, GAS CONCENTRATION DETECTION SYSTEM, AND GAS CONCENTRATION DETECTION METHOD
Document Type and Number:
Japanese Patent JP2021117046
Kind Code:
A
Abstract:
To provide a gas concentration detection device, a gas concentration detection system and a gas concentration detection method for detecting a gas concentration on the basis of comparison of a reference gas signal generated from a receive signal with the receive signal.SOLUTION: A gas concentration detection device 200 according to the present invention comprises: a detector 210 for detecting, via a measurement space 400, a laser beam outputted from a laser source driven by a saw-tooth drive current; a receive signal output unit 240 for outputting a receive signal that corresponds to the detection result of the detector 210; an edge detection unit 220 for detecting edges of the receive signal; a reference gas signal output unit 230 for generating a saw-tooth signal of the saw-tooth shape included in the receive signal on the basis of timing at which the edge is detected and outputting it as a reference gas signal; and a gas concentration detection unit 250 for detecting a gas concentration included in the measurement space 400 on the basis of comparison of the reference gas signal with the receive signal.SELECTED DRAWING: Figure 5
Inventors:
TAKAMORI DAIKI
Application Number:
JP2020009294A
Publication Date:
August 10, 2021
Filing Date:
January 23, 2020
Export Citation:
Assignee:
NEC PLATFORMS LTD
International Classes:
G01N21/61
Domestic Patent References:
| JP2014102152A | 2014-06-05 | |||
| JP2017194399A | 2017-10-26 | |||
| JP2014240808A | 2014-12-25 | |||
| JP2015227828A | 2015-12-17 | |||
| JP2018096074A | 2018-06-21 |
Foreign References:
| WO2014109126A1 | 2014-07-17 | |||
| WO2017090516A1 | 2017-06-01 |
Attorney, Agent or Firm:
Ken Ieiri