Title:
INFRARED ABSORPTION-TYPE CARBON DIOXIDE CONCENTRATION DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/127144
Kind Code:
A1
Abstract:
An infrared absorption-type carbon dioxide concentration detection device, comprising: an infrared light source circuit, a gas compartment holding a gas to be tested, and an infrared signal detection circuit. A first end of the gas compartment is fixed to a transmitting end of an infrared light source, a second end of the gas compartment is fixed to a detecting end of the infrared signal detection circuit, and an optical filter is provided within the gas compartment. The infrared light source circuit comprises an infrared light source driving circuit and the infrared light source, and also comprises a voltage measuring loop consisting of a voltage measuring circuit, an adjustable resistor, and a first processor. The first processor adjusts the resistance of the adjustable resistor on the basis of the voltages measured by the voltage measuring circuit at both ends of the infrared light source so as to maintain the stability of the voltages at both ends of the infrared light source, thus maintaining the luminous efficiency of the infrared light source in emitting an infrared light and the stability of light intensity, and increasing the accuracy of a carbon dioxide concentration test.
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Inventors:
CHEN HANDE (CN)
ZHOU YILONG (CN)
LIN SHIWEI (CN)
CHEN BAO (CN)
FU JIAN (CN)
LIN ZHENGXI (CN)
WANG LINGZHUAN (CN)
LIN HUIYUAN (CN)
FU ZHIHAO (CN)
HUANG XIUCAI (CN)
ZHOU YILONG (CN)
LIN SHIWEI (CN)
CHEN BAO (CN)
FU JIAN (CN)
LIN ZHENGXI (CN)
WANG LINGZHUAN (CN)
LIN HUIYUAN (CN)
FU ZHIHAO (CN)
HUANG XIUCAI (CN)
Application Number:
PCT/CN2021/111994
Publication Date:
June 23, 2022
Filing Date:
August 11, 2021
Export Citation:
Assignee:
HAINAN UNICAN SCIENCE AND TECH INNOVATION INSTITUTE CO LTD (CN)
International Classes:
G01N21/3504; G01N21/01
Foreign References:
| CN108982396A | 2018-12-11 | |||
| CN102036437A | 2011-04-27 | |||
| CN204102335U | 2015-01-14 | |||
| CN107490556A | 2017-12-19 | |||
| CN103674882A | 2014-03-26 | |||
| JP2012177690A | 2012-09-13 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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