A multifunctional gas sensor calibration container

Abstract

The invention discloses a multifunctional gas sensor calibration container. The multifunctional gas sensor calibration container comprises a main cavity with an opening in the top, and a cover plate. An annular electromagnet is embedded in and sleeved with the center of the upper surface of the cover plate. A gas inlet pipeline and a gas outlet pipeline are arranged on the portions, located on the two sides of the annular electromagnet, of the cover plate. A gas sensor connected with a computer is fixedly arranged on the portion, located in an annular cavity of the annular electromagnet, of the lower surface of the cover plate. An annular protection cover with an opening in the upper end, and a pressure sensor are arranged in the main cavity. The diameter of the opening in the upper end of the protection cover is larger than the inner diameter of the annular electromagnet and smaller than the outer diameter of the annular electromagnet. When the annular electromagnet is powered on, a closed space can be formed by the protection cover and the cover plate. The gas sensor is located in the closed space. When the annular electromagnet is powered off, the protection cover falls to the bottom of the main cavity through the dead weight. Due to the adoption of the structure, the sealing performance is good, poor sealing can be found in time, and meanwhile the multifunctional gas sensor calibration container can conduct calibration and detection on responsiveness of the gas sensor and functions are diverse.

Description

technical field [0001] The invention relates to an auxiliary device for the production and use of a gas sensor, in particular to a multifunctional gas sensor calibration container. Background technique [0002] The measurement of substance concentration with a sensor generally utilizes the correlation between the sensor response value and the concentration of the substance to be measured. The zero point and sensitivity of the sensor will inevitably drift during use. In order to obtain a more accurate measurement value, it is generally required to calibrate the sensor before measurement. [0003] Calibration requires a standard substance of known concentration to measure the sensor. For liquid and solid substances, it is relatively easy to obtain the concentration of the standard substance. Generally, it can be done in the laboratory by weighing it with an analytical balance and setting the volume of the volumetric flask. [0004] The gas calibration is basically a ruler wi...

AI Technical Summary

Problems solved by technology

However, the left cover and the right cover need to be sealed with the main cavity at the same time, the opening area is large, and the sealing effect is poor

In addition, commercially available sealing rings have small elasticity and poor wear resistance. After a period of use, they are easy to wear or age. When worn or aged, it is not easy to detect, and it is easy to cause poor sealing performance of the calibration container, which is easy to leak, and is not suitable for low-concentration gases. and toxic gas calibration

[0012] At the same time, the above-mentioned patent application has a single function and can only calibrate the gas sensor, but cannot detect and judge the rapid response of the gas sensor.

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