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Gas measurement method, gas measurement equipment and interference gas compensation device

A gas measurement and gas technology, applied in the direction of measuring devices, color/spectral characteristic measurement, material analysis through optical means, etc., can solve the problem of poor operability, high maintenance cost, and the inability of adsorbents to completely absorb interfering gases, etc. problems, to achieve the effects of low cost, environmental concentration compensation, simplicity and cost

Active Publication Date: 2013-06-19
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

However, this method has the following problems: 1. Different gases require different adsorbents. When measuring multiple gases, multiple adsorbents need to be connected externally, and the operability is not strong; 2. The adsorbents have a certain service life. , it needs to be replaced regularly, and the maintenance cost is high; 3. In large flow applications, the adsorbent cannot completely absorb the interfering gases in the atmosphere

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  • Gas measurement method, gas measurement equipment and interference gas compensation device
  • Gas measurement method, gas measurement equipment and interference gas compensation device
  • Gas measurement method, gas measurement equipment and interference gas compensation device

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Embodiment 1

[0028] Please refer to figure 1 , in one embodiment, the gas measurement device 100 includes a reference channel 110 , a measurement channel 120 , a gas measurement module 130 and an interfering gas compensation device 140 . The reference channel 110 is used to output electrical signals through air or measured gas. Since the reference channel is selected as a specific wavelength independent of all gas absorption wavelengths, there is no absorption for the measured gas, and its output electrical signal is a constant value, which does not vary with the type and type of the gas to be measured; the measurement channel 120 is used to pass air or The measured gas outputs an electrical signal. Since the measurement channel is selected as the wavelength absorbed by a specific gas, for example, a filter of a specific wavelength is used to pass a wavelength that can be absorbed by the gas to be measured. The specific gas concentration changes; after the measured gas is introduced into...

Embodiment 2

[0043] When the zero calibration operation occurs, the optimal ambient concentration characteristic value may be refreshed, that is, the compensation value may be changed. There may be a large gap between the new compensation value and the original compensation value. After the new compensation value is compensated and calculated, there may be a jump, which may cause an abnormal jump in the curve of the measured gas. In this embodiment, the measurement result smoothing unit 144 is added to eliminate the abnormal jump.

[0044] like Figure 4 As shown, the gas measurement device 200 includes a reference channel 210 , a measurement channel 220 , a gas measurement module 230 and an interfering gas compensation device 240 . The interfering gas compensation device 240 includes a zero calibration operation unit 241 , a compensation value determination unit 242 , a measurement result compensation calculation unit 243 and a measurement result smoothing unit 244 . The reference channe...

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Abstract

The invention discloses a gas measurement method, gas measurement equipment and an interference gas compensation device. The gas measurement method comprises the following steps of: during the process of measuring the measured gas, extracting air according to predetermined rules and performing zero-calibration measurement, and recording the zero-calibration measurement result; determining the compensation value of the measurement period according to the zero-calibration measurement result meeting set conditions in historical records, and extracting the measured gas and measuring, so as to obtain the primary measurement result of the measured gas in the measurement period; and performing compensation calculation on the measured primary measurement result of the measured gas by virtue of the measurement value of the measurement period, so as to obtain the measurement result of the measured gas after compensation. According to the gas measurement method, the gas measurement equipment and the interference gas compensation device disclosed by the invention, compensation is performed on an interference gas by obtaining the lowest point of the influence of the interference gas in an environment instead of an adsorbent mode, and compensating concentration calculation by virtue of the point, so as to reduce the influence of the environmental interference gas on the measurement result of the measured gas.

Description

technical field [0001] The invention relates to gas measurement and analysis, in particular to a gas measurement method, equipment and an interference gas compensation device for processing interference gas. Background technique [0002] The gas measurement technology based on non-dispersive infrared spectroscopy (NDIR, Non-Dispersive Infrared) requires a reference point during measurement to eliminate system drift errors, usually based on the concentration of the same type of gas as the measured gas in the atmosphere Zero reference point to correct or compensate the measured gas measurement results. However, the gas composition contained in the atmosphere may change due to the influence of the environment. For example, if the concentration of a certain gas increases, when the gas with the same composition as the measured gas in the atmosphere increases, it will cause the deviation of the zero reference point, thus It leads to the deviation of the measurement results and fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/01
CPCG01N21/3504
Inventor 岑建刘中华涂有强周赛新左鹏飞
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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