A kind of calibration tool and calibration method of gas sensor
A technology of gas sensor and calibration method, which is applied to standard gas analyzers, analytical gas mixtures, instruments, etc., can solve problems such as low accuracy, poor consistency, cross-interference, etc., and achieve the effect of improving work efficiency
Active Publication Date: 2018-06-29
HEBEI SAILHERO ENVIRONMENTAL PROTECTION HIGH TECH
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Problems solved by technology
[0004] In order to solve the technical problems of poor accuracy in the application process caused by the common shortcomings of gas sensors in the prior art, such as cross-interference between gases, low accuracy, and poor consistency, the present invention provides a high-accuracy, consistent Calibration tooling and calibration method for gas sensors with good performance
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Embodiment 1
[0035] to SO 2 The gas sensor is the gas sensor to be calibrated
[0036] Single Point Calibration: by SO 2 Cylinder gas 102 provides a fixed high concentration of SO 2 Standard gas, zero gas generator 103 generates diluent gas, and the two-way gas is mixed in the dynamic calibrator 101 to generate SO with a certain mixing ratio 2 Calibration gas (span gas), according to the SO to be calibrated 2 The number of gas sensors, after the flow rate is adjusted by the rotameter, enters the calibrating gas chamber in series, and the SO gas to be calibrated 2 Gas sensor contact, SO collected by data acquisition device 2 The output signal of the gas sensor, the final SO 2 Calibration gas into SO 2 In gas analyzers, detect SO 2 actual concentration. In operation, the power supply system supplies the SO to be calibrated through the circuit board 2 The gas sensor provides 5V voltage, and uses ~1 to collect each SO to be calibrated 2 The output signal of the gas sensor.
[0037] ...
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The invention discloses a calibration tool for gas sensors, and belongs to the technical field of gas sensor testing. The calibration tool comprises a calibration gas generating device and a gas analyzer which are connected with gas intakes and gas exhaust openings of the gas sensors through pipelines respectively. The calibration tool is arranged in groups, each group comprises a sensor set formed by the gas sensors arranged in series, and the gas intakes and the gas exhaust openings of the sensor sets are connected with the calibration gas generating device and the gas analyzer respectively. The invention further provides a calibration method of the calibration tool. According to the calibration tool and the calibration method, different sensors can be calibrated at the same time, and the sensors of the same kind can be calibrated in batch.
Description
technical field [0001] The invention belongs to the technical field of gas sensor testing, and relates to a gas sensor calibration tool and a calibration method. The accuracy and consistency of the gas sensor are greatly improved by adopting a standard gas calibration method. Background technique [0002] At present, the environmental monitoring centers in major and medium cities usually use traditional monitoring systems certified by the Environmental Protection Bureau to monitor air quality. The whole set of traditional detection systems costs around RMB 1 million, which is expensive and has a large system volume, high installation and maintenance costs, which limit their installation locations and are not suitable for high-intensity deployment. Therefore, it can only reflect the overall air quality of the city from a macroscopic point of view, but it cannot reflect the quality of air quality in a local area or a specific area from a microscopic point of view. [0003] A ...
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IPC IPC(8): G01N33/00
CPCG01N33/0006
Inventor 马景金张玲冯战榜陈晨谢东水赵新杰梁浩张福治高胜利程良
Owner HEBEI SAILHERO ENVIRONMENTAL PROTECTION HIGH TECH