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High-precision micro-flow infrared gas sensor and measurement method thereof

A gas sensor, high-precision technology, applied in measurement devices, color/spectral characteristic measurement, instruments, etc., can solve the problems of sensor detection signal, detector signal drift, spectral intensity drop, etc., and achieve low manufacturing cost and structure. Simple, eliminates the effects of long-term drift

Active Publication Date: 2013-03-20
WUHAN CUBIC OPTOELECTRONICS
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  • Claims
  • Application Information

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Problems solved by technology

The technical solutions in these two patents can solve the problem of low-range measurement, but neither can solve the problem of sensor detection signal drift caused by the decrease of the output spectral intensity of the infrared light source
[0005] Therefore, there is an urgent need for a device that can solve the problem of detector signal drift caused by the decrease in the output spectrum intensity of the infrared light source in the micro-flow infrared gas sensor, thereby improving the measurement accuracy of the micro-flow infrared gas sensor.

Method used

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  • High-precision micro-flow infrared gas sensor and measurement method thereof
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specific Embodiment 1

[0022] Specific embodiment 1: the gas to be measured is SO 2 High-precision micro-flow infrared gas sensor and its measurement method,

[0023] (1) The gas to be measured is SO 2 The construction of a high-precision microflow infrared gas sensor, such as figure 1 As shown, the gas to be measured is SO 2 High-precision micro-flow infrared gas sensor, including infrared light source system 1, measuring gas chamber 7, infrared semiconductor detector 6, narrow-band filter 8, micro-flow SO 2 Detector 4, signal processing and output system, infrared light source system 1, micro-flow SO 2 The detectors 4 are located at both ends of the measuring gas chamber 7, and the narrow-band filter 8 is located between the measuring gas chamber 7 and the microflow SO 2 Between the detectors 4, a channel 5 is provided on the side opposite to the gas inlet 2 and the gas outlet 3 on the measuring gas chamber, and the infrared semiconductor detector 6 is installed in the channel 5, and the micro...

specific Embodiment 2

[0049] Specific embodiment 2: the high-precision micro-flow infrared gas sensor and its measurement method where the gas to be measured is NO. When the gas to be measured is NO, the trace detector in the high-precision micro-flow infrared gas sensor is a micro-flow infrared NO detector , its structure and measurement method are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a high-precision micro-flow infrared gas sensor and a measurement method of the high-precision micro-flow infrared gas sensor. The high-precision micro-flow infrared gas sensor comprises an infrared light source system, a measuring gas chamber, an infrared semiconductor detector, a narrow-band light filter and a signal processing and output system, wherein a gas inlet and a gas outlet are formed on the same side of the measuring gas chamber, and the other side of the measuring gas chamber is provided with a channel; and the infrared semiconductor detector is arranged in the channel. The sensor measuring method comprises the following steps of: taking the infrared semiconductor detector as a reference channel, taking the micro-flow infrared detector as a measuring channel, correcting a measuring signal acquired through the measuring channel by a reference signal acquired through the reference channel, obtaining a correction signal, and performing processing operation to output a concentration value of the measuring gas by the signal processing and output system according to a reduction formula between the signal and gas concentration. The high-precision micro-flow infrared gas sensor is simple in structure and low in manufacturing cost, and the measuring precision and long-term stability of the micro-flow infrared gas sensor can be improved.

Description

technical field [0001] The invention relates to the technical field of micro-flow infrared gas sensor measurement, in particular to a high-precision micro-flow infrared gas sensor and a measurement method thereof. Background technique [0002] In the past 30 years, my country's economy has developed rapidly, and the resulting air pollution has become increasingly serious. In order to prevent the deterioration of air quality, maintain the health of the people, improve the living environment and improve the quality of life, the state promulgated the "People's Republic of China Atmospheric According to the Pollution Prevention and Control Law, the state and local governments have also formulated corresponding air pollutant emission standards, and require that stationary pollution sources must install a continuous smoke emission monitoring system (CEMS) to monitor and control the total amount of pollutants emitted by air pollution sources. [0003] With the strengthening of pollu...

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Application Information

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IPC IPC(8): G01N21/35G01N21/3504
Inventor 刘志强蒋泰毅何涛石平静
Owner WUHAN CUBIC OPTOELECTRONICS