KR-20260065217-A - Multi-Gas Sensor Monitoring System

Abstract

The present invention relates to a multi-gas sensor monitoring system, and more specifically, to a multi-gas sensor monitoring system capable of monitoring multiple gases using a non-dispersive infrared gas detector.

Inventors

• 이준석
• 백경훈
• 박보람
• 전수정

Assignees

• 주식회사 마하테크

Dates

Publication Date

20260508

Application Date

20241101

Claims (1)

1. An optical gas measuring cell having a gas inlet and a gas outlet arranged diagonally; and A light source provided on one side of the short side of the above gas measuring cell; and A sensing unit having a filter assembly having one or more optical bandpass filters provided on the other side of the short side of the gas measuring cell at the front; and In a multi-gas detector that measures the type and concentration of leaked gas using the absorbance detected by the above-mentioned detection unit, The above filter assembly comprises a filter housing, and the upper part of the filter housing comprises an upper film, and a space for positioning a lower film to position the lower film, and By adjusting the distance between the upper film and the lower film, the Fabry-Perot interference phenomenon is utilized to pass a light wavelength determined by the distance between the upper film and the lower film, and A spiral is formed inside the space where the lower film of the filter housing can be positioned, and a spiral is provided on the circumference of the lower film so that the lower film is rotated to move the lower film up and down, thereby passing the light wavelength selected by the Fabry-Perot interference. A multi-gas sensor monitoring system characterized by further providing a spacer film in the gap between the upper film and the lower film to prevent the gap between the upper film and the lower film from changing due to external shock or vibration.

Description

Multi-Gas Sensor Monitoring System The present invention relates to a multi-gas sensor monitoring system, and more specifically, to a multi-gas sensor monitoring system capable of monitoring multiple gases using a non-dispersive infrared gas detector. Prior art prior to the filing of the present invention discloses an optical composite gas detector and a measurement method. This technology relates to an apparatus and method for measuring composite gases using non-dispersive infrared radiation. The technology comprises a light source that generates light, a plurality of optical waveguides that transmit the light, a plurality of optical detection sensors that detect the transmitted light, and a driving unit that drives the light source to provide light to one of the plurality of optical detection sensors through one of the plurality of optical waveguides. Another prior art discloses a method for simply and precisely measuring a small amount of CO2 generated or lost by a plant during the cultivation and storage processes in a sealed space using a non-dispersive infrared method. In utilizing a sensor of the non-dispersive infrared method, a sample gas injection method is applied, and the method includes the steps of using N₂ gas, which does not react with the sensor, as a carrier gas and controlling a constant flow rate through a flow meter, installing a sample injection port in the path of the N₂ gas to allow the sample gas to move to the sensor, determining the flow rate of N₂ gas and the appropriate sample injection amount according to the concentration range of the measured gas, and a concentration calculation formula using a correction formula. Another prior art discloses a device for setting reference values and correcting measurement values for an optical gas detector. This technology enables the standard gas cell of the correction device for the optical gas detector to be continuously variable while maintaining it sealed at the same pressure, thereby allowing the gas measurement range of the detector to be changed linearly. This technology provides a device for setting reference values and correcting measurement values for an optical gas detector that includes a variable standard gas cell capable of setting multiple gas concentration correction values by varying the optical distance of the standard gas cell for measuring gas concentration. This technology provides a correction function when calibrating the detector to an optimal level during the manufacturing process for setting the measurement range, or when changing the measurement range during measurement. Figure 1 is a configuration diagram of a gas cell using four bandpass filters of the multi-gas sensor monitoring system of the present invention. FIG. 2 is a configuration diagram of a gas cell of a multi-gas sensor monitoring system using two sensing units of the present invention. Figure 3 is a configuration diagram of a gas cell of a multi-gas sensor monitoring system using four sensing units of the present invention. Figure 4 is an absorbance graph of FC3283 gas. Figure 5 is an absorbance graph of C5F8 gas. Figure 6 is an absorbance graph of CH4 gas. FIG. 7 illustrates an overlay graph of absorbance graphs of three types of gases for the design of an optical bandpass filter of the multi-gas sensor monitoring system of the present invention, and a selection process for an optical bandpass filter to separate or simultaneously detect each gas. FIG. 8 illustrates an alarm display according to the gas leak alarm setting of the multi-gas sensor monitoring system of the present invention (applicable when there is no leaked gas). FIG. 9 illustrates an alarm display according to the gas leak alarm setting of the multi-gas sensor monitoring system of the present invention (corresponding when gas is detected without alarm selected). FIG. 10 illustrates an alarm display according to the gas leak alarm setting of the multi-gas sensor monitoring system of the present invention (corresponding when alarm-selected gas is detected). FIG. 11 illustrates an alarm display according to the gas leak alarm setting of the multi-gas sensor monitoring system of the present invention (corresponding when a gas not selected for alarm is detected; in FIG. 10, when the setting of the gas selected as the alarm gas is changed to not selected for alarm). The terms used in this invention have been selected to be as widely used as possible; however, in specific cases, terms have been arbitrarily selected by the applicant. In such cases, the meaning should be understood by considering the meaning described or used in the detailed description of the invention, rather than merely the name of the term. Hereinafter, the technical configuration of the present invention will be described in detail with reference to preferred embodiments illustrated in the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other form