Calibration and calibration method and system of gas sensor

A technology of gas sensor and calibration method, which is applied in standard gas analyzers, closed-circuit television systems, and analysis of gas mixtures, etc. It can solve problems such as time-consuming, cumbersome process, and impact on gas sensor accuracy, so as to reduce delivery time and improve safety. , the effect of improving production efficiency

Pending Publication Date: 2021-10-22
浙江力夫传感技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when calibrating and calibrating the gas sensor, the gas sensor is firstly placed in the gas calibration room for calibration, and then it is taken out, and the gas environment of the corresponding concentration is simulated by the computer to obtain the corresponding output of the gas sensor (measured by a multimeter obtained), the whole process is cumbersome and time-consuming, and the measured output is not obtained in the environment of the gas calibration room, which has a certain impact on the accuracy of the gas sensor

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  • Calibration and calibration method and system of gas sensor
  • Calibration and calibration method and system of gas sensor
  • Calibration and calibration method and system of gas sensor

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Embodiment 1

[0034] Such as Figure 1-4 As shown, a calibration and calibration method for a gas sensor comprises the following steps:

[0035] S101. Measure the output of the gas sensor in two or more gas environments with known concentrations, the output is voltage or current, and voltage is selected in this embodiment;

[0036]Among them, the output of the gas sensor is measured, specifically: the operator puts the gas sensor into the gas calibration chamber (calibration device), operates the control cabinet, and uses the PLC to control the vacuum pump to evacuate the gas in the calibration device, so that the calibration device is a vacuum or Close to the vacuum state, then close the vacuum valve (such as vacuum solenoid valve), open the intake solenoid valve, depressurize the gas with known concentration and pass it into the calibration device through the flow meter (collecting flow data); the process of passing the gas In the process, the proportional valve is used to adjust the int...

Embodiment 2

[0055] A method for calibrating and calibrating a gas sensor based on a cloud platform, comprising the following steps:

[0056] S301. The gas sensor is placed in the calibration device in the calibration room, and the calibration platform sends a calibration command, which is transmitted to the control cabinet through the gateway;

[0057] S303. The control cabinet causes the PLC to control the vacuum pump to evacuate the gas in the calibration device to form a gas environment with a known concentration in the calibration device; wherein, a gas environment with a known concentration is formed in the calibration device, specifically: operate the control cabinet and use PLC control The vacuum pump evacuates the gas in the calibration device to make the calibration device in a vacuum or close to a vacuum state, then close the vacuum valve (such as a vacuum solenoid valve), open the intake solenoid valve, and decompress the gas with a known concentration (by reducing pressure ele...

Embodiment 3

[0081] A method for calibrating and calibrating a gas sensor based on a cloud platform, comprising the following steps:

[0082] S501. The gas sensor is placed in the calibration device in the calibration room, and the calibration platform sends a calibration command, which is transmitted to the control cabinet through the gateway;

[0083] S503, the control cabinet causes the PLC to control the vacuum pump to evacuate the gas in the calibration device, forming a gas environment of known concentration in the calibration device; wherein, forming a gas environment of known concentration in the calibration device, specifically: operating the control cabinet, using PLC control The vacuum pump evacuates the gas in the calibration device to make the calibration device in a vacuum or close to a vacuum state, then close the vacuum valve (such as a vacuum solenoid valve), open the intake solenoid valve, and decompress the gas with a known concentration (by reducing pressure electromagn...

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PUM

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Abstract

The invention discloses a calibration and calibration method and system for a gas sensor. The calibration and calibration method comprises the following steps: S101, measuring corresponding output quantities of the gas sensor in more than two gas environments with known concentrations; s103, fitting the output quantities of the gas sensor obtained in the step S101 and the known concentration of the corresponding gas environments into a calibration curve to realize calibration of the gas sensor; and S105, calibrating the calibration curve obtained in the step S103 by using a set standard curve, and replacing the output quantity corresponding to the calibration curve with the output quantity corresponding to the standard curve in a gas environment with the same concentration. The gas sensor is calibrated and calibrated at the same time in the preset gas concentration environment, and the factory time of the gas sensor is shortened.

Description

technical field [0001] The invention relates to the field of gas sensors, in particular to a calibration and calibration method and system for a gas sensor. Background technique [0002] Gas sensors are widely used in the detection of toxic, flammable, explosive, carbon dioxide and other gases. Environmental issues have always been one of the most concerned topics in the country and the world. The environment on which human beings rely has been suffering serious damage. How to To protect the environment, it is necessary to establish an environmental supervision mechanism, and the construction of the Internet of Things becomes necessary, and gas sensors, as the necessary sensors for environmental detection, will help to build the Internet of Things in the environment. [0003] A gas sensor is a converter that converts a certain gas volume fraction into a corresponding electrical signal. According to Memes Consulting, the value of a measuring instrument is determined by its a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00H04N7/18G01V8/10
CPCG01N33/0006H04N7/18G01V8/10
Inventor 刘春涛金玲珑王惠良赏纪良
Owner 浙江力夫传感技术有限公司
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