Gas leakage measurement device and gas leakage measurement method

Abstract

The present invention relates to a gas leakage measurement device and a gas leakage measurement method, and may comprise: a body part having a gas inlet in through which gas generated during the cooking of food flows, and having an accommodation space; a light source part for emitting light at the accommodation space; an optical sensor part which receives the light emitted from the light source part in a state in which the gas flows into the accommodation space, and which includes a first optical sensor that detects light of a first wavelength band including an absorption wavelength of a first gas component in the gas, and a second optical sensor that detects light of a second wavelength band including an absorption wavelength of a second gas component different from the first gas component in the gas; and a control part for determining, on the basis of first sensing information obtained by the first optical sensor and second sensing information obtained by the second optical sensor, whether the first gas component is detected.

Description

Gas leak measuring device and gas leak measuring method

[0001] The present invention relates to a gas leak measuring device and a gas leak measuring method, and more particularly, to a gas leak measuring device and a gas leak measuring method using optical gas sensing.

[0002] For reference, this application was carried out with the support of the ‘Development of Intelligent IOT Complex Sensor for Food Spoilage and Storage Monitoring’ project (Project Management No. 1415189873) of the EUREKA Cluster International Joint Technology Development Project.

[0003] Typically, restaurant kitchens and residential kitchens are at risk of gas leaks or explosions due to gas leaks. To mitigate these risks, gas leak detectors are installed in restaurant and residential kitchens to detect gas leaks and alert the user or sound an alarm.

[0004] Conventional gas leak detectors are mainly non-dispersive infrared absorption type (NDIR) gas leak detectors, which are devices that determine gas leaks by measuring the light absorption rate according to gas concentration using the characteristic of each gas molecule absorbing light of a specific wavelength.

[0005] Meanwhile, when preparing food in restaurant kitchens and other settings, a variety of ingredients, including alcohol and vinegar, are used. In particular, depending on the type of food, there are many instances where high concentrations of alcohol or vinegar are required.

[0006] At this time, alcohol and vinegar have absorption wavelengths in the hydrocarbon series, so there was a problem that conventional gas leak detectors would react and judge a gas leak or generate an alarm even when there was no actual gas leak. These unnecessary alarms also caused users to turn off the gas leak detector, which could lead to a gas explosion when an actual gas leak occurred.

[0007] The present invention aims to solve various problems, including the aforementioned ones, by providing a gas leak measurement device and a gas leak measurement method that prevent gas leak misjudgments due to alcohol, vinegar, etc., thereby increasing the reliability of gas leak detection and reducing gas accidents. However, these tasks are exemplary and the scope of the present invention is not limited thereby.

[0008] According to one embodiment of the present invention, a gas leak measurement device is provided. The gas leak measurement device may include: a body part having a gas inlet formed to allow gas generated when cooking food to flow in and a receiving space formed to receive the gas; a light source part formed in the receiving space to irradiate light in a full-wave band; an optical sensor part including a first optical sensor that receives the light irradiated from the light source part in a state where the gas flows into the receiving space and detects light in a first wavelength band including an absorption wavelength of a first gas component in the gas, and a second optical sensor that detects light in a second wavelength band including an absorption wavelength of a second gas component different from the first gas component in the gas; and a control part that determines whether the first gas component is detected based on first sensing information acquired from the first optical sensor and second sensing information acquired from the second optical sensor.

[0009] According to one embodiment of the present invention, the first gas component and the second gas component are gases including a CH bond, and the second gas component may have an absorption wavelength for light of the first wavelength band in addition to light of the second wavelength band.

[0010] According to one embodiment of the present invention, the first gas component may be a hydrocarbon, and the second gas component may be at least one of alcohol (C2H6O) and vinegar (CH3COOH).

[0011] According to one embodiment of the present invention, the first wavelength band may include a wavelength of 3.4 um, which is an absorption wavelength of hydrocarbon, and the second wavelength band may include a wavelength of 9.5 um, which is an absorption wavelength of alcohol (C2H6O) and vinegar (CH3COOH).

[0012] According to one embodiment of the present invention, the light sensor unit may further include a third light sensor that receives light of a third wavelength band that is not absorbed by the first gas component and the second gas component among the light irradiated from the light source unit, thereby obtaining reference light information.

[0013] According to one embodiment of the present invention, the third wavelength band may include a wavelength of 3.9 μm.

[0014] According to one embodiment of the present invention, the first optical sensor may include a first filter that selectively passes the first wavelength band, and the second optical sensor may include a second filter that selectively passes the second wavelength band.

[0015] According to one embodiment of the present invention, the hydrocarbon may include at least one of methane (CH4), ethane (C2H6), propane (C3H8), and butane (C4H10), or may be formed of a combination thereof.

[0016] According to one embodiment of the present invention, the apparatus further includes a correction sensor that measures at least one of humidity and temperature of the receiving space, and the control unit can receive correction information obtained from the correction sensor and correct the first sensing information and the second sensing information based on the correction information.

[0017] According to one embodiment of the present invention, the control unit can determine that there is no gas leak when the first gas component and the second gas component are simultaneously detected in the first sensing information and the second sensing information.

[0018] According to another embodiment of the present invention, a gas leak measurement method is provided. The gas leak measurement method may include a light irradiation step of irradiating light in a full-wave band to a receiving space of a body part through a light source unit; a light detection step of receiving the light irradiated from the light source unit while introducing gas generated during cooking of food through a gas inlet of the body part, detecting light in a first wavelength band including an absorption wavelength of a first gas component in the gas through a first light sensor, and detecting light in a second wavelength band including an absorption wavelength of a second gas component different from the first gas component in the gas through a second light sensor; and a detection determination step of determining whether the first gas component is detected based on first sensing information acquired from the first light sensor and second sensing information acquired from the second light sensor through a control unit.

[0019] According to another embodiment of the present invention, in the light sensing step, reference light information can be obtained by receiving light of a third wavelength band that is not absorbed by the first gas component and the second gas component among the light irradiated from the light source unit.

[0020] According to some embodiments of the present invention as described above, light of a first wavelength band can be detected using a first light sensor, and light of a second wavelength band different from the first wavelength band can be detected using a second light sensor, and a gas leak can be determined based on the detection result, thereby achieving the effect of implementing reliable gas leak detection without misjudgment of alcohol, vinegar, etc. Of course, the scope of the present invention is not limited by such effects.

[0021] Figure 1 is a schematic diagram showing a gas leak measuring device according to one embodiment of the present invention.

[0022] Figure 2 is a schematic diagram showing an optical sensor unit of a gas leak measurement device according to one embodiment of the present invention.

[0023] Figure 3 is a flowchart showing a gas leak measurement method according to one embodiment of the present invention.

[0024] Figure 4 is a graph showing various gas components and gas concentrations at the absorption wavelength of hydrocarbons.

[0025] Figure 5 is a graph showing various gas components and gas concentrations at the absorption wavelengths of hydrocarbons and alcohol and vinegar.

[0026] Figure 6 is a graph showing the detection of various gases at the absorption wavelengths of hydrocarbons and the absorption wavelengths of alcohol and vinegar.

[0027] Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0028] The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The following embodiments may be modified in various ways, and the scope of the present invention is not limited to the following embodiments. Rather, these embodiments are provided to more faithfully and completely explain the present disclosure and to fully convey the spirit of the present invention to those skilled in the art. In addition, the thickness and size of each layer in the drawings are exaggerated for convenience and clarity of explanation.

[0029] Hereinafter, embodiments of the present invention will be described with reference to drawings schematically illustrating ideal embodiments of the present invention. In the drawings, variations in the shapes depicted may be expected, for example, depending on manufacturing techniques and / or tolerances. Therefore, embodiments of the present invention should not be construed as limited to the specific shapes of the regions depicted herein, but should include, for example, variations in shapes resulting from manufacturing processes.

[0030] FIG. 1 is a schematic diagram showing a gas leak measuring device (100) according to one embodiment of the present invention, and FIG. 2 is a schematic diagram showing an optical sensor unit (30) of a gas leak measuring device (100) according to one embodiment of the present invention.

[0031] As illustrated in FIG. 1, the gas leak measuring device (100) may include a body (10), a light source (20), a light sensor (30), a control unit (40), and a correction sensor (50).

[0032] The body (10) is a reflective structure with an empty interior, and a space (A) capable of accommodating gas (G) can be formed.

[0033] For example, the receiving space (A) can be formed in various shapes, including a circular cylinder shape, a polygonal cylinder shape, a plate shape with an empty interior, or a tube shape.

[0034] For another example, the body (10) may include an integrating sphere. An integrating sphere may be a type of optical device that captures light emitted from a light source and enables uniform distribution of the light through repeated Lambertian reflections within the interior. Specifically, an integrating sphere may be a measuring device with a spherical interior, and the interior may be coated with white paint to ensure non-selective and even reflection close to a diffuse surface for various wavelengths.

[0035] Light incident within the receiving space (A) of the body portion (10) may be multiply reflected within the receiving space (A). For example, a reflective film for light reflection may be coated on the inner wall of the body portion (10), and a reflective structure may be additionally installed within the body portion (10).

[0036] The body (10) may be formed with a gas inlet (11) for the introduction of external gas. Specifically, gas (G) generated during cooking of food may be introduced through the gas inlet (11) and introduced into the receiving space (A).

[0037] For example, the gas inlet (11) may be formed on the upper surface, upper side, lower surface, or lower side of the body part (10), but is not limited thereto, and at least one gas inlet (11) may be formed in various locations including the upper surface, upper side, lower surface, or lower side so that gas (G) may be introduced.

[0038] The light source unit (20) is formed in the receiving space (A) and can irradiate light in the full-wave band. For example, the light source unit (20) can be formed by being coupled to the body unit (10) so as to irradiate light to gas introduced into the receiving space (A) through the gas inlet (11). At this time, the light source unit (20) can be installed on one side of the body unit (10) so as to irradiate light into the receiving space (A).

[0039] At least a portion of the light irradiated from the light source unit (20) may be multi-reflected in the receiving space (A). Accordingly, the light path within the receiving space (A) of the body unit (10) may be longer than the length of the receiving space (A). According to this structure, the probability that the light irradiated from the light source unit (20) can react with the gas (G) introduced into the receiving space (A) is increased, thereby enabling highly accurate analysis of even trace components within the gas.

[0040] For example, the light source unit (20) may include an infrared emitting device for irradiating non-dispersive infrared (NDIR) into the receiving space (A). Gas molecules have a characteristic of absorbing optical infrared of a specific wavelength, and according to this characteristic, infrared is irradiated to the gas (G) and the absorption rate of optical infrared of a specific wavelength is measured, thereby measuring the gas concentration. The infrared irradiated from the light source unit (20) may be non-dispersive infrared (NDIR) close to direct light for direction control. At this time, the light source unit (20) may include an infrared lamp capable of irradiating infrared in the full-wave band.

[0041] The light sensor unit (30) can receive light irradiated from the light source unit (20) in a state where gas (G) is introduced into the receiving space (A), and the light irradiated from the light source unit (20) can be scattered or reflected and received by the light sensor unit (30). For example, the light sensor unit (30) can be installed on the other side of the body unit (10) so as to face the light source unit (20).

[0042] For example, when the light source unit (20) uses non-dispersive infrared, the light sensor unit (30) may include at least one infrared sensor for detecting infrared. The infrared sensor may include a microbolometer, a thermopile, or the like.

[0043] Referring to FIG. 2, the optical sensor unit (30) may include a first optical sensor (31) and a second optical sensor (32). For example, it may have a sensor array structure to detect non-dispersive infrared rays of multiple wavelength bands. However, the present invention is not limited thereto, and the first optical sensor (31), the second optical sensor (32), and the third optical sensor (33) may not be arranged in an array within the optical sensor unit (30), but may be installed separately in each receiving space (A).

[0044] The first light sensor (31) can detect light of a first wavelength band including the absorption wavelength of the first gas component among the gases (G).

[0045] Specifically, the first optical sensor (31) can detect non-dispersive infrared rays irradiated from the light source unit (20) in a state where gas (G) is introduced into the receiving space (A), and can measure the concentration of the first gas component by detecting light of a first wavelength band including an absorption wavelength of the first gas component among the gas (G). More specifically, the first optical sensor (31) can include a first filter (31-1) that selectively passes the first wavelength band, so that light from the light source unit (20) can measure only the first wavelength band to be measured through the first filter (31-1) provided on the surface of the first optical sensor (31).

[0046] At this time, the first gas component may be a gas containing a CH bond, and specifically, may be a hydrocarbon, and more specifically, the hydrocarbon may include at least one or more of methane (CH4), ethane (C2H6), propane (C3H8), and butane (C4H10), or may be formed of a combination thereof.

[0047] For example, the first light sensor (31) can detect light in a first wavelength band including a wavelength of 3.2 um to 3.6 um, preferably, can detect light in a first wavelength band including a wavelength of 3.4 um, which is an absorption wavelength of hydrocarbons. More preferably, it can detect light in a first wavelength band including a wavelength of 3.375 um.

[0048] The second light sensor (32) can detect light of a second wavelength band that includes an absorption wavelength of a second gas component different from the first gas component among the gas (G).

[0049] Specifically, the second light sensor (32) can detect non-dispersive infrared rays irradiated from the light source unit (20) in a state where gas (G) is introduced into the receiving space (A), and can measure the concentration of the second gas component by detecting light of a second wavelength band including an absorption wavelength of the second gas component among the gas (G). More specifically, the second light sensor (32) can include a second filter (32-2) that selectively passes wavelengths of the second wavelength band, so that light emitted from the light source unit (20) can measure only the second wavelength band to be measured through the second filter (32-1) provided on the surface of the second light sensor (32).

[0050] At this time, the second gas component may be a gas containing a CH bond, and specifically, the second gas component may have an absorption wavelength for light of the first wavelength band in addition to light of the second wavelength band. More specifically, it may be at least one of alcohol (C2H6O) and vinegar (CH3COOH).

[0051] For example, the second light sensor (32) can detect light in a second wavelength band including a wavelength of 9.3 um to 9.7 um, and preferably, can detect light in a second wavelength band including a wavelength of 9.5 um, which is an absorption wavelength of alcohol (C2H6O) and vinegar (CH3COOH).

[0052] The optical sensor unit (30) may further include a third optical sensor (33) that receives light of a third wavelength band that is not absorbed by the first gas component and the second gas component among the light irradiated from the light source unit (20) to obtain reference optical information. Accordingly, the optical signals detected by the first optical sensor (31) and the second optical sensor (32) can be compared or corrected based on this reference optical information.

[0053] For example, the third light sensor (33) can measure the reference light intensity of non-dispersive infrared rays in a state where no gas (G) is introduced, or can measure the reference light intensity by receiving light of a third wavelength band that is not absorbed by the first gas component and the second gas component in a state where gas (G) is introduced.

[0054] The third light sensor (33) can detect light between the first wavelength band and the second wavelength band that does not overlap with the first wavelength band and the second wavelength band, and preferably, can detect light in the third wavelength band including a wavelength between 3.4 um and 9.5 um. More preferably, it can detect light in the third wavelength band including a wavelength of 3.9 um that is not absorbed by the first gas component and the second gas component.

[0055] The compensation sensor (50) can measure at least one of the humidity and temperature of the receiving space (A). For example, the compensation sensor (50) can be installed on the other side of the body part (10) so as to be positioned close to the light sensor part (30), but can also be installed in various locations, such as on the central side of the body part (10).

[0056] Specifically, the compensation sensor (50) may include a temperature sensor (51) and a humidity sensor (52). The temperature sensor (51) and the humidity sensor (52) may detect temperature or humidity for a predetermined period of time so as to reduce the influence of temperature or humidity when the light sensor unit (30) detects light. At this time, the temperature or humidity detected by the temperature sensor (51) and the humidity sensor (52) may be an average value for a predetermined period of time or one of the values ​​measured for a predetermined period of time may be selected.

[0057] For example, the temperature sensor (51) and the humidity sensor (52) can start detecting temperature or humidity when the light detection of the light sensor unit (30) starts, and can end detecting temperature or humidity when the light detection of the light sensor unit (30) ends. However, the present invention is not limited thereto, and the detection timing of the temperature sensor (51) and the humidity sensor (52) can be directly set by the user, or can be set to detect automatically at regular intervals.

[0058] The control unit (40) can determine whether the first gas component is detected based on the first sensing information obtained from the first light sensor (31) and the second sensing information obtained from the second light sensor (32).

[0059] For example, the control unit (40) can determine whether the first gas component is detected based on the light information in the first wavelength band acquired from the first light sensor (31) and the light information in the second wavelength band acquired from the second light sensor (32).

[0060] The control unit (40) can determine that there is no gas leak when light of the first wavelength band is detected in the first sensing information and light of the second wavelength band is detected simultaneously in the second sensing information, and can determine that there is a gas leak when only light of the first wavelength band is detected in the first sensing information and the second sensing information.

[0061] For example, if light of a first wavelength band is detected in the first sensing information and light of a second wavelength band is detected simultaneously in the second sensing information, the control unit (40) can determine that the second gas component is alcohol or vinegar and determine that there is no gas leak, and if light of a first wavelength band is detected in the first sensing information and light of a second wavelength band is not detected in the second sensing information, the control unit (40) can determine that the first gas component is hydrocarbon and determine that there is a gas leak.

[0062] The light detected by the first optical sensor (31) may include a wavelength of 3.4 μm and may be detected by a leak of hydrocarbons, such as methane gas, due to a gas facility, or by the use of alcohol or vinegar. Therefore, although the presence of a gas leak within the measurement space can be determined using the first sensing information through the first optical sensor (31), since the gas leak may also be detected by the use of alcohol or vinegar, it is also necessary to determine whether light in the 9.5 μm wavelength band, which is the absorption wavelength of alcohol or vinegar, is detected.

[0063] Alcohol and vinegar can generate gas when used in cooking. Therefore, using the second sensing information from the second optical sensor (32), it is possible to determine whether the gas formed within the measurement space is due to a hydrocarbon leak, such as methane gas, from the gas facility, or whether the gas is generated by alcohol or vinegar.

[0064] Accordingly, when cooking food that requires high concentrations of alcohol or vinegar in a restaurant kitchen or the like, even if gas generated by the alcohol or vinegar is detected through secondary sensing information, the gas leak detection device can prevent false judgments or alarms due to non-leakage. Accordingly, it is also possible to prevent cases where the gas leak detector is turned off due to unnecessary alarms, thereby effectively preparing for gas explosions, etc.

[0065] For example, the control unit (40) can determine whether a gas leak has occurred based on the first sensing information obtained from the first light sensor (31) and the second sensing information obtained from the second light sensor (32), so as to prepare for the case where hydrocarbons and alcohol or vinegar gases are simultaneously generated within the measurement space.

[0066] Specifically, when light of a first wavelength band is detected in the first sensing information and light of a second wavelength band is detected simultaneously in the second sensing information, the control unit (40) determines the weight or ratio of the second sensing information to the first sensing information, and if it is included outside the range of a preset reference weight or ratio or is higher than the preset reference weight or ratio, it can be determined that there is a gas leak.

[0067] At this time, the preset standard specific gravity or standard ratio can be set by measuring the concentration of the first gas component and the concentration of the second gas component in a state where gas due to alcohol or vinegar is introduced, and calculating the specific gravity or ratio of the concentration of the second gas component to the concentration of the first gas component.

[0068] For example, in the case of a mixed gas in which hydrocarbons and alcohol or vinegar gases are generated simultaneously within a measurement space, it can be calculated based on the light absorption ratio of the two wavelengths. In the case of methane (CH4), it can be measured as 3.4 um:9.5 um=1:0, and in the case of alcohol (C2H6O), it can be measured as 3.4 um:9.5 um=1:1. For example, in the case of measuring as 3.4 um:9.5 um=4:3, methane (CH4) can be calculated as 1 and alcohol (C2H6O) can be calculated as 3, so that a graph for the absorption wavelength of hydrocarbons and the absorption wavelength of alcohol and vinegar, such as in FIG. 5, can be generated to have a slope of 45 degrees or less based on the horizontal axis.

[0069] Accordingly, even if a hydrocarbon gas leak, such as methane gas, and a gas leak due to alcohol or vinegar occur simultaneously through a gas facility within an actual measurement space, it is possible to determine whether a gas leak has occurred based on a preset standard, thereby enabling preparation for various situations and providing a highly reliable gas leak measurement device (100).

[0070] The control unit (40) can receive correction information obtained from the correction sensor (50) and correct the first sensing information, the second sensing information, and the third sensing information based on the correction information.

[0071]

[0072] *Specifically, the control unit (40) can determine whether the first gas component is detected based on the first sensing information, the second sensing information, and the third sensing information, which are less affected by temperature or humidity, by compensating using the temperature or humidity detected by at least one of the temperature sensor (51) and the humidity sensor (52). In particular, the third sensing information can be compensated to prevent interference with water.

[0073] In addition, the control unit (40) may perform voltage compensation for the first sensing information, the second sensing information, and the third sensing information.

[0074] For example, a gas leak detection device (100) may be installed in a restaurant kitchen or a home kitchen, or in various spaces where cooking takes place. In this case, it may be installed above or around a gas facility to quickly detect gas (G) and determine whether there is a gas leak or generate an alarm based on the determination.

[0075] Hereinafter, a method for measuring a gas leak will be described. For convenience, the method for measuring a gas leak will be described with reference to a gas leak measuring device (100).

[0076] Figure 3 is a flowchart showing a gas leak measurement method according to one embodiment of the present invention.

[0077] Referring to FIGS. 1 to 3, a gas leak measurement method according to one embodiment includes a light irradiation step (S100) of irradiating light of a full-wave band to a receiving space (A) of a body part (10) through a light source part (20), a light detection step (S200) of receiving light irradiated from a light source part (20) in a state where gas (G) generated during cooking is introduced through a gas inlet (11) of the body part (10), detecting light of a first wavelength band including an absorption wavelength of a first gas component in the gas (G) through a first light sensor (31), and detecting light of a second wavelength band including an absorption wavelength of a second gas component different from the first gas component in the gas (G) through a second light sensor (32), and a control unit (40) based on first sensing information acquired from the first light sensor (31) and second sensing information acquired from the second light sensor (32). 1 It may include a detection judgment step (S300) for judging whether a gas component is detected.

[0078] In the light detection step (S200), the first wavelength band may include a wavelength of 3.2 um to 3.6 um, preferably, a wavelength of 3.4 um, which is an absorption wavelength of hydrocarbons. More preferably, it may include a wavelength of 3.375 um.

[0079] In the light detection step (S200), the second wavelength band may include a wavelength of 9.3 um to 9.7 um, and preferably, may include a wavelength of 9.5 um, which is an absorption wavelength of alcohol (C2H6O) and vinegar (CH3COOH).

[0080] In the light detection step (S200), reference light information can be obtained by receiving light of a third wavelength band that is not absorbed by the first gas component and the second gas component among the light irradiated from the light source unit (20).

[0081] At this time, the third wavelength band may be a band between the first wavelength band and the second wavelength band that does not overlap with the first wavelength band and the second wavelength band, and preferably may include a wavelength between 3.4 um and 9.5 um, and more preferably, may include a wavelength of 3.9 um that is not absorbed by the first gas component and the second gas component.

[0082] Next, in the detection judgment step (S300), it is possible to determine whether the first gas component is detected based on the light information in the first wavelength band acquired from the first light sensor (31) and the light information in the second wavelength band acquired from the second light sensor (32).

[0083] Specifically, if light of the first wavelength band is detected in the first sensing information and light of the second wavelength band is detected simultaneously in the second sensing information, it can be determined that there is no gas leak, and if only light of the first wavelength band is detected in the first sensing information and the second sensing information, it can be determined that there is a gas leak.

[0084] More specifically, when light of a first wavelength band is detected in the first sensing information and light of a second wavelength band is detected simultaneously in the second sensing information, it can be determined that the second gas component is alcohol or vinegar, and thus a gas leak can be determined. When light of a first wavelength band is detected in the first sensing information and light of a second wavelength band is not detected in the second sensing information, it can be determined that the first gas component is hydrocarbon, and thus a gas leak can be determined.

[0085] For example, in the detection judgment step (S300), in order to prepare for the case where hydrocarbons and alcohol or vinegar gases are simultaneously generated within the measurement space, it is possible to determine whether a gas leak has occurred based on the first sensing information acquired from the first light sensor (31) and the second sensing information acquired from the second light sensor (32).

[0086] Specifically, when light of a first wavelength band is detected in the first sensing information and light of a second wavelength band is detected simultaneously in the second sensing information, a weight or ratio of the second sensing information to the first sensing information is determined, and if it is outside the range of a preset reference weight or ratio or is higher than the preset reference weight or ratio, it can be determined that there is a gas leak.

[0087] At this time, the preset standard specific gravity or standard ratio can be set by measuring the concentration of the first gas component and the concentration of the second gas component in a state where gas due to alcohol or vinegar is introduced, and calculating the specific gravity or ratio of the concentration of the second gas component to the concentration of the first gas component.

[0088] For example, in the detection judgment step (S300), the correction information obtained from the correction sensor (50) is authorized, and after the first sensing information and the second sensing information are corrected based on the correction information, it is possible to determine whether the first gas component is detected.

[0089] Below, the analysis results and comparison results at various absorption wavelengths are described in more detail.

[0090] Figure 4 is a graph showing various gas components and gas concentrations at the absorption wavelength of hydrocarbons.

[0091] Referring to Figure 4, the concentrations of various types of gases can be seen at a wavelength of 3.4 μm, which is the absorption wavelength of hydrocarbons. Accordingly, although it is possible to determine whether there is a gas leak within the measurement space through the first optical sensor (31), it is necessary to check the measured concentration in the second wavelength band to determine whether alcohol or vinegar is detected, as it may react to various gases, including alcohol or vinegar.

[0092] Figure 5 is a graph showing various gas components and gas concentrations at the absorption wavelengths of hydrocarbons and alcohol and vinegar, and Figure 6 is a graph showing whether various gases are detected at the absorption wavelengths of hydrocarbons and alcohol and vinegar.

[0093] Referring to Figure 5, in the case of ethanol, it can be confirmed that it reacts simultaneously at the absorption wavelength of the hydrocarbon and the absorption wavelengths of alcohol and vinegar. In the case of acetone, it can be confirmed that it reacts simultaneously at the absorption wavelength of the hydrocarbon and the absorption wavelengths of alcohol and vinegar. In the case of acetic acid, it can be confirmed that it reacts simultaneously at the absorption wavelength of the hydrocarbon and the absorption wavelengths of alcohol and vinegar. However, in the case of methane (CH4), it can be confirmed that it reacts only at the absorption wavelength of the hydrocarbon.

[0094] Accordingly, in order to prevent misjudgment of gas leakage due to alcohol or vinegar, additional detection must be performed through the second light sensor (32) as well as the first light sensor (31) for gas generated during cooking of food.

[0095] Referring to Figure 6, in cases of (A) and (B), since the absorption wavelengths of hydrocarbons and the absorption wavelengths of alcohol and vinegar react simultaneously, it can be determined that alcohol and vinegar are present and thus no gas leak can be determined. On the other hand, in cases of (C) and (D), since the absorption wavelengths of hydrocarbons react only, it can be determined that hydrocarbons are present and thus gas leak can be determined.

[0096] Therefore, according to the gas leak measuring device and gas leak measuring method according to various embodiments of the present invention, by detecting light at a wavelength of 3.4 um, which is an absorption wavelength of hydrocarbon, and at the same time detecting light at a wavelength of 9.5 um, which is an absorption wavelength of alcohol or vinegar, and judging gas leak and non-leakage based on the two sensing information, it is possible to prevent misjudgment of gas leak due to alcohol or vinegar.

[0097] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent alternative embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A body part in which a gas inlet is formed to allow gas generated during cooking to flow in, and a receiving space is formed to accommodate the gas; A light source unit formed in the above-mentioned receiving space and irradiating light in the radio band; An optical sensor unit including a first optical sensor that receives the light irradiated from the light source unit while the gas is introduced into the receiving space, detects light of a first wavelength band including an absorption wavelength of a first gas component among the gas, and a second optical sensor that detects light of a second wavelength band including an absorption wavelength of a second gas component different from the first gas component among the gas; and A control unit that determines whether the first gas component is detected based on the first sensing information obtained from the first optical sensor and the second sensing information obtained from the second optical sensor; A gas leak measuring device comprising:

2. In paragraph 1, The first gas component and the second gas component are gases containing CH bonds, A gas leak measuring device, wherein the second gas component has an absorption wavelength in addition to light in the second wavelength band and also in light in the first wavelength band.

3. In paragraph 2, The above first gas component is, It is a hydrocarbon, The above second gas component is, A gas leak measuring device, comprising at least one of alcohol (C2H6O) and vinegar (CH3COOH).

4. In paragraph 3, The above first wavelength band includes a wavelength of 3.4 μm, which is the absorption wavelength of hydrocarbons, A gas leak measuring device, wherein the second wavelength band includes a wavelength of 9.5 um, which is an absorption wavelength of alcohol (C2H6O) and vinegar (CH3COOH).

5. In paragraph 1, The above optical sensor part, A third optical sensor that receives light of a third wavelength band that is not absorbed by the first gas component and the second gas component among the light irradiated from the light source unit, thereby obtaining reference optical information; A gas leak measuring device further comprising:

6. In paragraph 5, A gas leak measuring device, wherein the third wavelength band includes a wavelength of 3.9 um.

7. In paragraph 4, The above first optical sensor, comprising a first filter selectively passing the first wavelength band; The above second optical sensor, A gas leak measuring device comprising a second filter that selectively passes the second wavelength band.

8. In paragraph 3, The above hydrocarbons are, A gas leak measuring device comprising at least one of methane (CH4), ethane (C2H6), propane (C3H8), and butane (C4H10), or a combination thereof.

9. In paragraph 1, Further comprising a compensation sensor for measuring at least one of humidity and temperature of the above-mentioned receiving space; The above control unit, A gas leak measuring device that receives correction information acquired from the correction sensor and corrects the first sensing information and the second sensing information based on the correction information.

10. In paragraph 1, The above control unit, A gas leak measuring device that determines that there is no gas leak when the first gas component and the second gas component are detected simultaneously in the first sensing information and the second sensing information.

11. A light irradiation step of irradiating light of a full-wave band into the receiving space of the body part through a light source part; A light detection step of receiving the light irradiated from the light source while introducing gas generated during cooking of food through the gas inlet of the body part, detecting light of a first wavelength band including an absorption wavelength of a first gas component of the gas through a first light sensor, and detecting light of a second wavelength band including an absorption wavelength of a second gas component different from the first gas component of the gas through a second light sensor; and A detection judgment step for judging whether the first gas component is detected based on the first sensing information acquired from the first light sensor and the second sensing information acquired from the second light sensor through a control unit; A method for measuring gas leaks, comprising:

12. In paragraph 11, In the above light detection step, By receiving light of a third wavelength band that is not absorbed by the first gas component and the second gas component among the light irradiated from the light source, reference light information is obtained. Method of measuring gas leaks.

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