Title:
DEVICE AND METHOD FOR MEASURING GAS CONCENTRATION
Document Type and Number:
WIPO Patent Application WO/2019/109782
Kind Code:
A1
Abstract:
Provided are a device and method for measuring gas concentration. The device comprises at least two stages of current pumps (6, 7 and 13) and a current measurement device connected to the at least two stages of current pumps (6, 7 and 13), the at least two stages of current pumps (6, 7 and 13) comprising a primary pump (6) and a secondary pump (7) connected in sequence in the flow direction of a measured gas, wherein the primary pump (6) pumps out the input measured gas by means of electrodes (8 and 9) thereof and generates a primary pump current; the secondary pump (7) pumps out the residual measured gas by means of electrodes (10 and 11) thereof and generates a secondary pump current; and the current measurement device measures the primary pump current and the secondary pump current, and adjusts a voltage applied to the primary pump (6) according to the magnitude of the secondary pump current until the measured secondary pump current is not greater than a pre-set value close to zero. The device and method for measuring the gas concentration effectively improve the reliability and precision of gas concentration measurement by means of a simple structure.
Inventors:
LI CHUNGANG (CN)
YUAN CHUN (CN)
YUAN CHUN (CN)
Application Number:
PCT/CN2018/115108
Publication Date:
June 13, 2019
Filing Date:
November 13, 2018
Export Citation:
Assignee:
SHENZHEN SENSOR TECH CO LTD (CN)
International Classes:
G01N27/416
Foreign References:
| CN107764885A | 2018-03-06 | |||
| CN207689418U | 2018-08-03 | |||
| CN202814903U | 2013-03-20 | |||
| CN1500211A | 2004-05-26 | |||
| CN102003295A | 2011-04-06 | |||
| CN1286754A | 2001-03-07 | |||
| CN102890109A | 2013-01-23 | |||
| CN102639995A | 2012-08-15 | |||
| US20050029127A1 | 2005-02-10 | |||
| US20080237064A1 | 2008-10-02 | |||
| US20020000376A1 | 2002-01-03 |
Attorney, Agent or Firm:
CHINA TRUER IP (CN)
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