Odor measuring device and method

Abstract

To provide an odor measuring device and method capable of improving an odor sensor's measurement accuracy.SOLUTION: A measuring device and method supplies clean air into an odor sensor chamber, such that the clean air cleans previous odor measuring target gas particles remaining in the odor sensor chamber and on a surface of the odor sensor, and simultaneously, a heating process on the odor sensor allows the previous odor measuring target gas particles to be easily desorbed from the surface of the odor sensor and then supplies new odor measuring target gas to the odor sensor chamber. A cooling process on the odor sensor allows new odor measuring target gas particles to be easily adsorbed to the surface of the odor sensor, and it is possible to improve the measurement accuracy of the odor sensor.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an odor measuring device and method, and more particularly to an odor measuring device and method that can improve the measurement accuracy of an odor sensor by facilitating adsorption and desorption of gas particles onto the surface of an odor sensor. [Background technology]

[0002] As is well known, the main cause of complaints about new cars is the inherent odors and volatile organic compounds (VOC) odors generated from various vehicle interior materials such as seat covers, headlinings, door trims, mats, etc. In addition, mold growth and foul odors generated by moisture condensed in the evaporator core when the vehicle's air conditioner is operating also cause discomfort to vehicle users. Furthermore, the external air that flows in from outside the vehicle while the vehicle is running contains various foul odors due to the surrounding environment, and the foul odors that flow in from outside can also cause discomfort to vehicle users.

[0003] As described above, various odors occurring inside and outside the vehicle can degrade the sensory quality of the vehicle. Therefore, in order to analyze the causes of various odors occurring inside and outside the vehicle and take measures to remove them, accurate measurement by an odor sensor and construction of odor data must be performed in advance, and a process is required to clearly determine what is actually causing the odor by analyzing the components and concentrations of various odors occurring inside and outside the vehicle.

[0004] Meanwhile, in order to solve the complaints related to odors occurring in various industrial sites as well as vehicles, a process of accurately measuring the components and concentrations of odors by disposing odor sensors in the industrial sites must be preceded. For this purpose, as conventional odor sensors for measuring odors occurring in various industrial sites as well as vehicles, electro-chemical odor sensors and electro-chemical odor sensor arrays are used, or bio-odor sensors such as biopeptide type sensors and sensors using amino acids are used.

[0005] Referring to the attached FIG. 1, when a conventional odor sensor 20 is attached inside an odor sensor chamber 10, and a gas to be measured flows from a gas inlet 12 formed on one side of the odor sensor chamber 10 toward a gas outlet 14 formed on the other side, gas particles to be measured are adsorbed onto the surface of the odor sensor 20, thereby performing odor measurement by the odor sensor 20.

[0006] For example, when gas particles to be measured are adsorbed on the surface of the electrochemical odor sensor, an odor measurement is performed that outputs an electrical signal, and when gas particles to be measured are adsorbed on the surface of the bio-odor sensor, an odor measurement is performed that outputs different color signals, RGB signals, brightness signals, etc. according to the amount of gas adsorbed. However, while the odor data measured by the odor sensor is acquired based on a predetermined time, not only are the gas particles to be measured not uniformly mixed in the air during the predetermined time, but the odor data measured by the odor sensor may change depending on the temperature and humidity of the air containing the gas particles, which ultimately results in a problem that the measurement accuracy of the odor sensor may be reduced.

[0007] In particular, the odor measurement of newly inflowing gas particles can be performed accurately only when the gas particles to be measured are adsorbed and then desorbed on the surface of the odor sensor, but if the previously adsorbed gas particles cannot be properly desorbed from the surface of the odor sensor, the measurement accuracy of the odor sensor decreases. More specifically, as shown in Fig. 1, if some of the gas particles of the previous odor measurement target cannot be properly desorbed and remain adsorbed on the surface of the odor sensor 20 mounted inside the odor sensor chamber 10, the gas particles of the new odor measurement target will be mixed with some of the gas particles of the previous odor measurement target and will not be properly adsorbed on the surface of the odor sensor, resulting in a problem of the measurement accuracy of the odor sensor decreasing. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an odor measuring device and method that can improve the measurement accuracy of an odor sensor by supplying clean air such as fresh air or pure air to the inside of the odor sensor chamber after odor measurement by an odor sensor attached inside the odor sensor chamber is completed, so that gas particles of the previous odor measurement target remaining inside the odor sensor chamber and on the surface of the odor sensor are cleaned by the clean air, and at the same time, by a heating process for the odor sensor to easily detach the gas particles of the previous odor measurement target from the surface of the odor sensor.

[0009] Another object of the present invention is to provide an odor measuring device and method in which gas particles of the previous odor measurement target remaining inside the odor sensor chamber and on the surface of the odor sensor are cleaned with clean air, and then a new gas of the odor measurement target is supplied to the odor sensor chamber, and a cooling process for the odor sensor allows the new gas particles of the odor measurement target to be easily adsorbed onto the surface of the odor sensor, thereby further improving the measurement accuracy of the odor sensor. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, an odor measuring device according to one embodiment of the present invention is characterized in that it includes an odor sensor chamber having a clean air supply port and a gas inlet formed on one side and a gas exhaust port formed on the other side, an odor sensor mounted inside the odor sensor chamber, a first valve mounted to the clean air supply port, a second valve mounted to the gas inlet, a third valve mounted to the gas exhaust port, a first heater mounted to the odor sensor chamber for heating the odor sensor, a first cooler mounted to the odor sensor chamber for cooling the odor sensor, and a controller for opening and closing the first valve, the second valve, and the third valve, and for performing on / off control of the first heater and the first cooler.

[0011] In an odor measuring device according to one embodiment of the present invention, the controller is configured to control the first valve and the third valve to be open and at the same time control the second valve to be closed in order to supply clean air to the inside of the odor sensor chamber after the odor measurement by the odor sensor is completed.

[0012] In an odor measuring device according to one embodiment of the present invention, the controller is configured to control the first heater to be turned on after the odor measurement by the odor sensor is completed, so that heating the odor sensor desorbs gas particles previously subject to odor measurement from the surface of the odor sensor.

[0013] In an odor measuring device according to one embodiment of the present invention, the controller is configured to control the second valve to be open while simultaneously controlling the first valve and the third valve to be closed in order to supply new gas to be measured for odor measurement into the odor sensor chamber.

[0014] In an odor measuring device according to one embodiment of the present invention, the controller is configured to control the first cooler to be turned on so that cooling of the odor sensor causes new gas particles to be measured to be adsorbed onto the surface of the odor sensor.

[0015] An odor measurement method according to one embodiment of the present invention is characterized by including the steps of: completing odor measurement by an odor sensor mounted in an odor sensor chamber; supplying clean air into the odor sensor chamber to remove gas particles of the previous odor measurement target; turning on a first heater mounted in the odor sensor chamber to heat the odor sensor in order to desorb the gas particles of the previous odor measurement target from the surface of the odor sensor; and discharging the gas particles of the previous odor measurement target that have been desorbed from the surface of the odor sensor and the gas particles of the previous odor measurement target that remained inside the odor sensor chamber to the outside of the odor sensor chamber by the clean air.

[0016] An odor measurement method according to one embodiment of the present invention is characterized in that it further includes a step of turning on a first cooler attached to the odor sensor chamber to cool the odor sensor when new gas to be measured for odor is supplied inside the odor sensor chamber so that gas particles of the new gas to be measured for odor are adsorbed onto the surface of the odor sensor.

[0017] Another odor measuring device according to the present invention is characterized in that it includes: a pre-chamber having a clean air supply port and a first gas inlet formed on one side and a first gas exhaust port formed on the other side; a gas flow pipe connected between the clean air supply port and the first gas inlet and the first gas exhaust port; an odor sensor chamber having a second gas inlet formed on one side and a second gas exhaust port formed on the other side; a connecting pipe connected between the first gas exhaust port and the second gas inlet; an odor sensor installed inside the odor sensor chamber; a first valve installed in the clean air supply port, a second valve installed in the first gas inlet, and a third valve installed in the second gas exhaust port; a temperature adjustment unit installed in the pre-chamber and adjusting the temperature of gas passing through the gas flow pipe; and a controller for opening and closing the first valve, the second valve, and the third valve, and for controlling the on / off of the temperature adjustment unit.

[0018] In another aspect of the odor measuring device of the present invention, the temperature control unit is characterized by being composed of a second heater mounted in the pre-chamber for heating the gas passing through the gas flow pipe, and a second cooler mounted in the pre-chamber for cooling the gas passing through the gas flow pipe.

[0019] In another aspect of the odor measuring device of the present invention, the controller is configured to control the first valve and the third valve to be open and at the same time control the second valve to be closed in order to supply clean air to the inside of the odor sensor chamber through the gas flow pipe after the odor measurement by the odor sensor is completed.

[0020] In an odor measuring device according to another aspect of the present invention, the controller is configured to control the second heater to be turned on so that the clean air flowing through the gas flow pipe is heated.

[0021] In another aspect of the odor measuring device of the present invention, the controller is configured to control the second valve to be open while simultaneously controlling the first valve and the third valve to be closed in order to supply new gas to be measured for odor into the odor sensor chamber through the gas flow pipe.

[0022] In another aspect of the odor measuring device of the present invention, the controller is configured to control the second cooler to be turned on so that new gas to be subjected to odor measurement flowing through the gas flow pipe is cooled.

[0023] According to another aspect of the present invention, the odor measuring device further includes a first heater that is mounted in the odor sensor chamber for heating the odor sensor and is controlled on / off by the controller, and a first cooler that is mounted in the odor sensor chamber for cooling the odor sensor and is controlled on / off by the controller.

[0024] In another aspect of the odor measuring device of the present invention, the controller is configured to control the first heater to be turned on after the odor measurement by the odor sensor is completed, so that heating the odor sensor desorbs gas particles of the previous odor measurement target from the surface of the odor sensor.

[0025] In another aspect of the odor measuring device of the present invention, the controller is configured to control the first cooler to be turned on so that cooling of the odor sensor causes new gas particles to be measured to be adsorbed onto the surface of the odor sensor.

[0026] Another odor measurement method according to the present invention is characterized by including the steps of: completing odor measurement by an odor sensor mounted in an odor sensor chamber; supplying clean air to a gas flow pipe of a pre-chamber connected to the odor sensor chamber so as to be communicatively connected; turning on a second heater mounted in the pre-chamber to heat the clean air flowing through the gas flow pipe; entering the heated clean air into the odor sensor chamber to desorb gas particles of the previous odor measurement target from the surface of the odor sensor; and discharging the gas particles of the previous odor measurement target desorbed from the surface of the odor sensor and the gas particles of the previous odor measurement target remaining inside the odor sensor chamber to the outside of the odor sensor chamber by the clean air.

[0027] An odor measurement method according to another aspect of the present invention is characterized in that it further includes a step of turning on a first heater attached to the odor sensor chamber to heat the odor sensor so that gas particles previously subject to odor measurement are desorbed from the surface of the odor sensor.

[0028] According to another aspect of the present invention, the odor measurement method further includes a step of turning on a second cooler mounted in the pre-chamber to cool the new gas to be measured flowing through the gas flow pipe when new gas to be measured is supplied into the odor sensor chamber through the gas flow pipe of the pre-chamber so that gas particles of the new gas to be measured are adsorbed onto the surface of the odor sensor.

[0029] An odor measurement method according to another aspect of the present invention is characterized in that it further includes a step of turning on a first cooler attached to the odor sensor chamber to cool the odor sensor so that new gas particles to be measured are adsorbed onto the surface of the odor sensor. Effect of the Invention

[0030] By solving the above problems, the present invention has the following effects. First, the gas particles of the previous odor measurement target remaining inside the odor sensor chamber and on the surface of the odor sensor are cleaned using clean air, and at the same time, the heating process for the odor sensor allows the gas particles of the previous odor measurement target to be easily detached from the surface of the odor sensor, thereby improving the measurement accuracy of the odor sensor. Second, by preheating the clean air in the pre-chamber before supplying it to the inside of the odor sensor chamber, the heated clean air can more easily detach the gas particles that were previously the subject of odor measurement from the surface of the odor sensor, thereby further improving the measurement accuracy of the odor sensor. Third, after cleaning the gas particles of the previous odor measurement target that remain inside the odor sensor chamber and on the surface of the odor sensor, a cooling process for the odor sensor allows new gas particles of the new odor measurement target to be easily adsorbed onto the surface of the odor sensor, thereby improving the measurement accuracy of the odor sensor. Fourth, by allowing the clean air to be pre-cooled in the pre-chamber before being supplied to the inside of the odor sensor chamber, the cooled clean air can more easily adsorb new gas particles to be measured onto the surface of the odor sensor, thereby further improving the measurement accuracy of the odor sensor. [Brief description of the drawings]

[0031] [Figure 1] FIG. 1 is a schematic diagram showing a conventional odor measuring device. [Diagram 2] 1 is a schematic diagram showing an odor measuring device according to one embodiment of the present invention. [Diagram 3] 1 is a schematic diagram showing the operational flow of an odor measuring device according to one embodiment of the present invention. FIG. [Figure 4] 1 is a schematic diagram showing the operational flow of an odor measuring device according to one embodiment of the present invention. FIG. [Diagram 5] 1 is a schematic diagram showing the operational flow of an odor measuring device according to one embodiment of the present invention. FIG. [Figure 6] 3 is a flowchart showing an odor measuring method according to one embodiment of the present invention. [Figure 7] FIG. 4 is a schematic diagram showing an odor measuring device according to another embodiment of the present invention. [Figure 8] 4 is a schematic diagram sequentially showing the operational flow of an odor measuring device according to another embodiment of the present invention. FIG. [Figure 9] 4 is a schematic diagram sequentially showing the operational flow of an odor measuring device according to another embodiment of the present invention. FIG. [Figure 10] 4 is a schematic diagram sequentially showing the operational flow of an odor measuring device according to another embodiment of the present invention. FIG. [Figure 11] 5 is a flowchart showing an odor measuring method according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] It should be understood that the specific structures or functional descriptions described in the embodiments in this specification are merely illustrative for purposes of describing embodiments according to the concept of the present invention, and that the embodiments according to the concept of the present invention may be implemented in various forms, and that the invention should not be construed as being limited to the embodiments described in this specification, but includes all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0033] Meanwhile, in the present invention, the terms "first" and / or "second" are used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another component, for example, the first component may be called the second component, and similarly, the second component may be called the first component, within the scope of the concept of the present invention.

[0034] When a component is said to be "coupled" or "connected" to another component, it should be understood that it may be directly coupled or connected to the other component, but there may be other components in between. In contrast, when a component is said to be "directly coupled" or "in direct contact with" another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to," should be interpreted similarly.

[0035] The same reference numbers refer to the same components throughout the specification. The terms used herein are for the purpose of describing the embodiments only and are not intended to limit the invention. In this specification, the singular forms include the plural forms unless the context clearly dictates otherwise. As used in the specification, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, operations and / or elements to a referenced component, step, operation and / or element.

[0036] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. EXAMPLES

[0037] 2 to 5 show an odor measuring device according to one embodiment of the present invention, and in each drawing, reference numeral 100 indicates an odor sensor chamber.

[0038] The odor sensor chamber 100 has a structure in which a clean air supply port 101 and a gas inlet 102 are formed on one side, and a gas outlet 103 is formed on the other side. In particular, an odor sensor 110 is attached to the inner bottom surface of the odor sensor chamber 100, and the odor sensor 110 may be an electro-chemical odor sensor or a bio-odor sensor. Therefore, the odor sensor 110 performs odor measurement by adsorbing gas particles of the odor measurement target on the surface of the odor sensor 110. For example, when gas particles of the odor measurement target are adsorbed on the surface of the electro-chemical odor sensor, an odor measurement is performed in which an electrical signal is output to the controller 150, and when gas particles of the odor measurement target are adsorbed on the surface of the bio-odor sensor, an odor measurement is performed in which a color signal, an RGB signal, a brightness signal, etc. are output to the controller 150.

[0039] A clean air supply source for supplying clean air, such as fresh air (filtered outside air) or pure air (e.g., pure nitrogen, pure carbon dioxide), is connected to the clean air supply port 101 of the odor sensor chamber 100. The gas inlet 102 of the odor sensor chamber 100 is connected to be able to communicate with the interior of the vehicle, so that air containing various odors generated inside and outside the vehicle or future mobility (such as PBV or UAM) can flow into the odor sensor chamber 100 through the gas inlet 102.

[0040] The gas exhaust port 103 of the odor sensor chamber 100 is a passage communicating with the outside air, and the gas after the odor measurement by the odor sensor 110 is completed is exhausted to the outside through the gas exhaust port 103. The clean air supply port 101 is equipped with a first valve 121 that is controlled to open when clean air is supplied to the inside of the odor sensor chamber 100, and the gas inlet 102 is equipped with a second valve 122 that is controlled to open when the gas to be measured is supplied to the inside of the odor sensor chamber 100. The gas exhaust port 103 is equipped with a third valve 123 that is controlled to close so that the gas to be measured remains in the odor sensor chamber 100 during odor measurement by the odor sensor 110, and is controlled to open so that the gas after the odor measurement by the odor sensor 110 is completed is exhausted to the outside.

[0041] In particular, a first heater 130 for heating the odor sensor 110 and a first cooler 140 for cooling the odor sensor 110 are mounted side by side at the bottom of the odor sensor chamber 100. For example, a hot wire coil or the like may be used as the first heater 130, and a blower or the like that draws in cool air generated by the air conditioner of the vehicle may be used as the first cooler 140, or the first heater 130 and the first cooler 140 may be employed as a single Peltier element that operates for heating or cooling.

[0042] On the other hand, at a high temperature above a certain level, the frequency of collision and contact of the gas particles of the odor measurement subject with the surface of the odor sensor decreases, and the rate at which the gas particles of the odor measurement subject are adsorbed to the surface of the odor sensor decreases, because as the momentum of the gas particles increases due to thermal vibration, the adsorption and binding force of the gas particles to the surface of the odor sensor decreases. Therefore, at a high temperature above a certain level, the gas particles of the odor measurement subject are not easily adsorbed to the surface of the odor sensor 110, and can be easily desorbed from the surface of the odor sensor 110. Conversely, at a low temperature below a certain level, the frequency of collision and contact of the gas particles of the odor measurement subject with the surface of the odor sensor increases, and the rate at which the gas particles of the odor measurement subject are adsorbed to the surface of the odor sensor increases, because as the momentum of the gas particles due to thermal vibration decreases, the adsorption and binding force of the gas particles to the surface of the odor sensor increases.

[0043] For this reason, at low temperatures below a certain level, gas particles of the odor measurement subject can be easily adsorbed onto the surface of odor sensor 110, and the gas particles of the odor measurement subject do not easily desorb from the surface of odor sensor 110. Therefore, in cases where gas particles of the previous odor measurement subject are not desorbed but remain adsorbed onto the surface of odor sensor 110, the gas particles of the previous odor measurement subject can be easily desorbed from the surface of odor sensor 110 by heating odor sensor 110 through the on-activation of first heater 130.

[0044] On the other hand, when a new gas to be measured for odor flows into the odor sensor chamber 100, the odor sensor 110 is cooled by turning on the first cooler 140, so that the gas particles of the new odor measurement target can be easily adsorbed onto the surface of the odor sensor 110. Meanwhile, the controller 150 is configured to perform opening / closing control for the first valve 121, the second valve 122, and the third valve 123, and to perform on / off control for the first heater 130 and the first cooler 140.

[0045] For example, the controller 150 is configured to control the first valve 121 and the third valve 123 to open and the second valve 123 to close in order to supply clean air to the inside of the odor sensor chamber 100 after the odor measurement by the odor sensor 110 is completed, i.e., after receiving an odor measurement signal from the odor sensor 110. The controller 150 is also configured to control the first heater 130 to turn on so that the gas particles of the previous odor measurement target are easily desorbed from the surface of the odor sensor 110 by heating the odor sensor 110 after the odor measurement by the odor sensor 110 is completed, i.e., after receiving an odor measurement signal from the odor sensor 110. Furthermore, the controller 150 is configured to control the first heater 130 to be turned off after a certain period of time, and to control the second valve 122 to be open in order to supply new gas to be measured for odor into the odor sensor chamber 100, while simultaneously controlling the first valve 121 and the third valve 123 to be closed.

[0046] In addition, the controller 150 is configured to control the first cooler 140 to be turned on so that cooling of the odor sensor 110 allows new gas particles to be measured that have entered the odor sensor chamber 100 to be easily adsorbed onto the surface of the odor sensor 110.

[0047] Here, an odor measuring method according to one embodiment of the present invention, which is carried out based on the above configuration, will be described as follows.

[0048] 6 is a flow chart showing an odor measurement method according to one embodiment of the present invention. First, the controller 150 determines whether or not the odor measurement of the odor sensor 110 installed in the odor sensor chamber 100 has been completed (S101). For example, when the controller 150 receives an odor measurement signal from the odor sensor 110, it can determine that the odor measurement of the odor sensor 110 has been completed.

[0049] At this time, some of the gas particles of the previous odor measurement subject may remain inside the odor sensor chamber 100, and some of the gas particles of the previous odor measurement subject may also remain in an adsorbed state on the surface of the odor sensor 110. If it is determined in step S101 that odor measurement by the odor sensor 110 has ended, the process proceeds to a step of supplying clean air into the odor sensor chamber 100 to remove gas particles of the previous odor measurement subject (S102).

[0050] For this purpose, the controller 150 performs opening control on the first valve 121 and the third valve 123 while simultaneously performing closing control on the second valve 123, so that the clean air provided from the clean air supply source passes through the clean air supply port 101 of the odor sensor chamber 100 and is supplied to the inside of the odor sensor chamber 100 as shown in Fig. 3. Preferably, the controller 150 performs purge control or on / off control on the pump of the clean air supply source based on clean air flow rate information determined by the pump capacity of the clean air supply source supplying the clean air and volume information of the odor sensor chamber 100, so that a flow rate of clean air equal to the volume of the odor sensor chamber 100 is supplied into the odor sensor chamber 100.

[0051] Furthermore, when it is determined in step S101 that odor measurement by the odor sensor 110 has ended, the process proceeds to a step of heating the odor sensor 110 (S103) in order to desorb gas particles of the previous odor measurement target from the surface of the odor sensor 110. For this purpose, the controller 150 controls to turn on the first heater 130, thereby heating the odor sensor 110 as shown in FIG.

[0052] At this time, by heating the odor sensor 110, the gas particles of the previous odor measurement target can be easily desorbed from the surface of the odor sensor 110. The reason for this is that, as described above, the momentum of the gas particles increases due to thermal vibration, and the adsorptive binding force of the gas particles to the surface of the odor sensor decreases. Furthermore, the flow force of the clean air flowing inside the odor sensor chamber 100 allows the gas particles of the previous odor measurement target to be more easily desorbed from the surface of the odor sensor 110.

[0053] Therefore, the gas particles of the previous odor measurement subject that remained in the odor sensor chamber 100 due to the flow force of the clean air flowing inside the odor sensor chamber 100 and the gas particles of the previous odor measurement subject that have detached from the surface of the odor sensor 110 are discharged to the outside through the gas exhaust port 103 of the odor sensor chamber 100 (S105).

[0054] Next, a new gas to be subjected to odor measurement is supplied into the odor sensor chamber 100 (S106). For this purpose, the controller 150 controls the first heater 130 to be turned off after a certain time, and at the same time, controls the second valve 122 to be opened and the first valve 121 and the third valve 123 to be closed in order to supply a new gas to be subjected to odor measurement into the odor sensor chamber 100.

[0055] For this reason, as shown in FIG. 4, a new gas to be subjected to odor measurement is supplied into the odor sensor chamber 100 through a gas supply port 102 formed on one side of the odor sensor chamber 100 .

[0056] Preferably, the controller 150 performs purge control or on / off control on the pump for supplying the new gas to be measured based on flow rate information regarding the new gas to be measured, which is determined by the pump capacity for supplying the new gas to be measured, and volume information of the odor sensor chamber 100, so that a flow rate of the new gas to be measured that is equal to the volume of the odor sensor chamber 100 is supplied into the odor sensor chamber 100.

[0057] Furthermore, when new gas to be measured is supplied to the inside of the odor sensor chamber 100, a step of cooling the odor sensor 110 proceeds (S107). For this purpose, when the controller 150 controls the second valve 122 to open, it controls the first cooler 140 to turn on, thereby cooling the odor sensor 110 as shown in Figures 4 and 5. At this time, by cooling the odor sensor 110, new gas particles to be measured can be easily adsorbed to the surface of the odor sensor 110, because, as described above, the momentum of the gas particles due to thermal vibration decreases, and the adsorption and binding force of the gas particles to the surface of the odor sensor increases.

[0058] Therefore, the measurement accuracy of the odor sensor can be improved by allowing the gas particles of the new odor measurement target to be easily adsorbed to the surface of the odor sensor 110 through the cooling process for the odor sensor 110. Preferably, the controller 150 controls the first cooler 140 to be on for a certain period of time so that the gas particles of the new odor measurement target are stably adsorbed to the surface of the odor sensor 110, and then, as shown in Fig. 5, the first valve 121, the second valve 122, and the third valve 123 are controlled to be closed so that only the gas of the new odor measurement target remains in the odor sensor chamber 100, thereby allowing the odor measurement process of the odor sensor 110 to be performed accurately.

[0059] According to one embodiment of the present invention, clean air is supplied to the inside of odor sensor chamber 100 so that gas particles of the previous odor measurement subject remaining inside odor sensor chamber 100 and on the surface of the odor sensor are cleaned by the clean air, and at the same time, a heating process for odor sensor 110 is performed so that the gas particles of the previous odor measurement subject are easily desorbed from the surface of odor sensor 110, and then a new odor measurement subject gas is supplied to odor sensor chamber 100, and a cooling process for odor sensor 110 is performed so that the gas particles of the new odor measurement subject are easily adsorbed onto the surface of odor sensor 110, thereby improving the measurement accuracy of the odor sensor. EXAMPLES

[0060] 7 to 10 attached herewith show an odor measuring device according to another embodiment of the present invention, and in each drawing, reference numeral 200 designates a pre-chamber.

[0061] The pre-chamber 200 has a structure in which a clean air supply port 201 and a first gas inlet 202 are formed on one side, and a first gas outlet 203 is formed on the other side. Inside the pre-chamber 200, a gas flow pipe 204 is arranged, which is connected between the clean air supply port 201 and the first gas inlet 202 and the first gas outlet 203, and allows the clean air or the gas to be measured for odor to flow.

[0062] Preferably, the gas flow pipe 204 is composed of a first gas flow pipe 204-1 connected between the clean air supply port 201 and the first gas exhaust port 203, and a second gas flow pipe 204-2 connected between the first gas inlet 202 and the first gas flow pipe 204-1. A clean air supply source for supplying clean air such as fresh air (filtered outside air) or pure air (e.g., pure nitrogen, pure carbon dioxide) is connected to the clean air supply port 201 of the pre-chamber 200.

[0063] The first gas inlet 202 of the pre-chamber 200 is connected to be able to communicate with the interior of the vehicle, so that air containing various odors generated inside and outside the interior of a vehicle or future mobility (such as a PBV or UAM) can flow into a gas flow pipe 204 of the pre-chamber 200 through the first gas inlet 202. In addition, the odor sensor chamber 210 is connected to the first gas outlet 203 of the pre-chamber 200 by a connecting pipe 205 to be able to communicate with it. The odor sensor chamber 210 has a structure in which a second gas inlet 211 is formed on one side and a second gas outlet 212 is formed on the other side.

[0064] Therefore, by connecting the connecting pipe 205 between the first gas outlet 203 of the pre-chamber 200 and the second gas inlet 211 of the odor sensor chamber 210, the gas flow pipe 204 in the pre-chamber 200 and the odor sensor chamber 210 are in communication with each other. In particular, an odor sensor 220 is attached to the inner bottom surface of the odor sensor chamber 210, and the odor sensor 220 may be an electro-chemical odor sensor or a bio-odor sensor. Therefore, the gas particles to be measured are adsorbed to the surface of the odor sensor 220, whereby the odor sensor 220 measures the odor.

[0065] For example, when gas particles to be measured are adsorbed onto the surface of an electrochemical odor sensor, an odor measurement is performed in which an electrical signal is output to controller 250, and when gas particles to be measured are adsorbed onto the surface of a bio-odor sensor, an odor measurement is performed in which a color signal, an RGB signal, a brightness signal, etc. are output to controller 250.

[0066] Meanwhile, the second gas exhaust port 212 of the odor sensor chamber 210 is a passage communicating with the outside air, and the gas after the odor measurement by the odor sensor 220 is completed is exhausted to the outside through the second gas exhaust port 212. A first valve 231 that is controlled to open when clean air is supplied to the inside of the odor sensor chamber 210 is attached to the clean air supply port 201 of the pre-chamber 200, and a second valve 232 that is controlled to open when gas to be measured is supplied to the inside of the odor sensor chamber 210 is attached to the first gas inlet 202.

[0067] A third valve 233 is attached to the second gas outlet 212 of the odor sensor chamber 210, and the third valve 233 is controlled to be closed so that the gas to be measured remains in the odor sensor chamber 210 during odor measurement by the odor sensor 220, and is controlled to be open so that the gas is discharged to the outside after the odor measurement is completed by the odor sensor 220. In particular, the pre-chamber 200 is equipped with a temperature control unit that controls the temperature of the gas passing through the gas flow pipe 204, a second heater 230-2 for preheating the gas passing through the gas flow pipe 204, and a second cooler 240-2 for precooling the gas passing through the gas flow pipe 204.

[0068] For example, a hot wire coil or the like may be used as the second heater 230-2, and a blower or the like that draws in cool air generated by the vehicle's air conditioner may be used as the second cooler 240-2, or the second heater 230-2 and the second cooler 240-2 may be employed as a single Peltier element that performs heating or cooling operations. In addition, a first heater 230-1 for heating the odor sensor 220 and a first cooler 240-1 for cooling the odor sensor 220 are installed side by side in the lower part of the odor sensor chamber 210.

[0069] Similarly, a hot wire coil or the like may be used as the first heater 230-1, and a blower that draws in cool air generated by the vehicle's air conditioner may be used as the first cooler 240-1, or the first heater 230-1 and the first cooler 240-1 may be adopted as a single Peltier element that performs heating or cooling operations.

[0070] On the other hand, at temperatures above a certain level, the frequency with which the gas particles of the odor measurement subject collide with and come into contact with the surface of the odor sensor decreases, and the rate at which the gas particles of the odor measurement subject are adsorbed onto the surface of the odor sensor decreases, because as the momentum of the gas particles increases due to thermal vibration, the adsorption and bonding force of the gas particles to the surface of the odor sensor decreases. Therefore, at temperatures above a certain level, the gas particles of the odor measurement subject are not easily adsorbed onto the surface of odor sensor 220, and can be easily desorbed from the surface of odor sensor 220.

[0071] Conversely, at temperatures below a certain level, the frequency with which the gas particles of the odor measurement subject collide with and come into contact with the surface of the odor sensor increases, and the rate at which the gas particles of the odor measurement subject are adsorbed onto the surface of the odor sensor increases, because as the momentum of the gas particles due to thermal vibration decreases, the adsorption and binding force of the gas particles to the surface of the odor sensor increases. Therefore, at temperatures below a certain level, the gas particles of the odor measurement subject can be easily adsorbed onto the surface of odor sensor 220, and the gas particles of the odor measurement subject do not easily desorb from the surface of odor sensor 220.

[0072] Therefore, when gas particles of the previous odor measurement subject are maintained in an adsorbed state without being desorbed on the surface of the odor sensor 220, the second heater 230-2 is turned on to preheat clean air and supply it into the odor sensor chamber 210, and in addition, the odor sensor 220 is heated by turning on the first heater 230-1, so that the gas particles of the previous odor measurement subject can be easily desorbed from the surface of the odor sensor 220. On the other hand, when a new odor measurement subject gas flows into the odor sensor chamber 210, the second cooler 240-2 is turned on to precool the new odor measurement subject gas and supply it into the odor sensor chamber 210, and in addition, the first cooler 240-1 is turned on to cool the odor sensor 220, so that the gas particles of the new odor measurement subject can be easily adsorbed on the surface of the odor sensor 220.

[0073] Meanwhile, the controller 250 is configured to perform opening / closing control of the first valve 231, the second valve 232, and the third valve 233, to perform on / off control of the first heater 230-1 and the first cooler 240-1, and to perform on / off control of the second heater 230-2 and the second cooler 240-2. For example, after the odor measurement by the odor sensor 220 is completed, i.e., after receiving an odor measurement signal from the odor sensor 220, the controller 250 is configured to control the first valve 231 and the third valve 233 to be open and at the same time control the second valve 232 to be closed in order to supply clean air to the inside of the odor sensor chamber 210 through the gas flow pipe 204.

[0074] Furthermore, the controller 250 is configured to control the second heater 230-2 to be turned on so that the clean air flowing through the gas flow pipe 204 is pre-heated after the odor measurement by the odor sensor 220 is completed, i.e., after receiving an odor measurement signal from the odor sensor 220. Furthermore, the controller 250 is configured to control the first heater 230-1 to be turned on so that the gas particles of the previous odor measurement target are desorbed from the surface of the odor sensor 2220 by heating the odor sensor 220 after the odor measurement by the odor sensor 220 is completed, i.e., after receiving an odor measurement signal from the odor sensor 220.

[0075] In response to this, the controller 250 is configured to control the second valve 232 to be open and simultaneously control the first valve 231 and the third valve 233 to be closed in order to supply new gas as an odor measurement target through the gas flow pipe 204 into the odor sensor chamber 210. The controller 250 is also configured to control the second cooler 240-2 to be turned on so that the new gas as an odor measurement target flowing through the gas flow pipe 204 is cooled in advance.

[0076] Furthermore, the controller 250 is configured to control the first cooler 240-1 to be turned on so that the cooling of the odor sensor 220 causes new gas particles to be the object of odor measurement to be adsorbed onto the surface of the odor sensor 220. Here, an odor measuring method according to another embodiment of the present invention performed based on the above configuration will be described as follows.

[0077] FIG. 11 is a flowchart showing an odor measuring method according to another embodiment of the present invention.

[0078] First, the controller 250 determines whether or not odor measurement by the odor sensor 220 mounted in the odor sensor chamber 210 has been completed (S201). For example, when the controller 250 receives an odor measurement signal from the odor sensor 220, it can determine that odor measurement by the odor sensor 220 has been completed. At this time, some of the gas particles of the previous odor measurement target may remain inside the odor sensor chamber 210, and some of the gas particles of the previous odor measurement target may also remain adsorbed on the surface of the odor sensor 220.

[0079] If it is determined in step S201 that odor measurement by the odor sensor 220 has been completed, the process proceeds to a step of pre-heating the clean air that flows into the clean air supply port 201 of the pre-chamber 200 and along the gas flow pipe 204 and supplying it into the interior of the odor sensor chamber 210 (S202). To this end, the controller 250 controls the first valve 231 and the third valve 233 to open, while simultaneously controlling the second valve 123 to close, so that clean air provided from the clean air supply source can pass through the clean air supply port 201 of the pre-chamber 200 and flow along the gas flow pipe 204, as shown in FIG. 8.

[0080] Preferably, the controller 150 performs purge control or on / off control on the pump of the clean air supply source based on clean air flow rate information determined by the pump capacity of the clean air supply source supplying the clean air and volume information of the gas flow conduit 204 of the pre-chamber 200 and the odor sensor chamber 100, so that a flow rate of clean air equal to the volume of the gas flow conduit 204 of the pre-chamber 200 and the odor sensor chamber 100 is supplied along the gas flow conduit 204 into the odor sensor chamber 100.

[0081] In addition, when the controller 250 controls the first valve 231 to open, the second heater 230-2 mounted in the pre-chamber 200 is controlled to be turned on, whereby the clean air flowing along the gas flow pipe 204 is heated, and the heated clean air is supplied to the inside of the odor sensor chamber 210 via the first gas exhaust port 203, the connecting pipe 205, and the second gas inlet 211 in that order. Therefore, when the heated clean air is supplied into the odor sensor chamber 210, it serves to primarily desorb gas particles that were previously the object of odor measurement from the surface of the odor sensor 220 (S203).

[0082] More specifically, when the heated clean air enters the odor sensor chamber 21 and transfers heat to the gas particles of the previous odor measurement subject that have been adsorbed onto the surface of the odor sensor 220, the momentum of the gas particles increases due to thermal vibration and the adsorption and binding force of the gas particles to the surface of the odor sensor 220 decreases, allowing the gas particles of the previous odor measurement subject to easily detach from the surface of the odor sensor 220. At the same time, the flow force of the heated clean air acts on the surface of the odor sensor 220, allowing the gas particles of the previous odor measurement subject to easily detach from the surface of the odor sensor 220.

[0083] Meanwhile, a step of heating the odor sensor 220 can be further carried out (S204) in order to more easily desorb the gas particles of the previous odor measurement target from the surface of the odor sensor 220. For this purpose, the controller 250 controls to turn on the first heater 230-1, thereby heating the odor sensor 220 as shown in FIG.

[0084] At this time, by heating the odor sensor 220, the gas particles previously subject to odor measurement can be easily detached from the surface of the odor sensor 220. This is because, as described above, the momentum of the gas particles increases due to thermal vibration, reducing the adsorption and binding force of the gas particles to the surface of the odor sensor. Furthermore, the flow force of the heated clean air flowing inside the odor sensor chamber 210 allows the gas particles that were previously the subject of odor measurement to be more easily detached from the surface of the odor sensor 220 .

[0085] Therefore, the gas particles of the previous odor measurement subject remaining in the odor sensor chamber 210 due to the flow force of the clean air flowing inside the odor sensor chamber 210 and the gas particles of the previous odor measurement subject desorbed from the surface of the odor sensor 220 are discharged to the outside through the second gas exhaust port 212 of the odor sensor chamber 210 (S206). Next, a new gas of the odor measurement subject is cooled in advance and supplied to the inside of the odor sensor chamber 210 (S207).

[0086] To this end, in order to supply new gas for odor measurement into the odor sensor chamber 210, the controller 250 controls the second valve 232 to open, while simultaneously controlling the first valve 231 and the third valve 233 to close, thereby allowing the new gas for odor measurement to pass through the first gas inlet 202 of the pre-chamber 200 and flow along the gas flow pipe 204.

[0087] Preferably, the controller 150 performs purge control or on / off control on the pump for supplying the new gas to be subjected to odor measurement based on flow rate information regarding the new gas to be subjected to odor measurement determined by the pump capacity for supplying the new gas to be subjected to odor measurement and volume information of the gas flow conduit 204 of the pre-chamber 200 and the odor sensor chamber 100, so that a flow rate of the new gas to be subjected to odor measurement equal to the volume of the gas flow conduit 204 of the pre-chamber 200 and the odor sensor chamber 100 is supplied into the odor sensor chamber 100 along the gas flow conduit 204. In addition, when the controller 250 controls the second valve 232 to open, the controller 250 controls the second cooler 240-2 mounted in the pre-chamber 200 to be turned on, so that the new gas to be measured for odor flowing along the gas flow pipe 204 is pre-cooled, as shown in FIG. 9, and the cooled new gas to be measured for odor is supplied to the inside of the odor sensor chamber 210 via the first gas outlet 203, the connecting pipe 205, and the second gas inlet 211 in that order.

[0088] For this reason, when the cooled new gas to be measured for odor is supplied into the odor sensor chamber 210, the gas particles of the new odor measurement target can be easily adsorbed onto the surface of the odor sensor 110, because the momentum of the gas particles due to thermal vibration decreases and the adsorption and binding force of the gas particles to the surface of the odor sensor increases. Also, when the controller 250 controls the second valve 232 to open, the controller 250 controls the first cooler 240-1 to be turned on, thereby cooling the odor sensor 220 as shown in Fig. 9 (S208).

[0089] At this time, by cooling odor sensor 220, new gas particles to be measured for odor can be more easily adsorbed onto the surface of odor sensor 220, because, as described above, the momentum of the gas particles due to thermal vibration decreases, and the adsorptive binding force of the gas particles to the surface of the odor sensor increases. Therefore, by cooling the new gas to be measured for odor in advance and allowing the gas particles to be easily adsorbed onto the surface of odor sensor 220 through the cooling process of odor sensor 220, the measurement accuracy of the odor sensor can be improved.

[0090] Preferably, the controller 250 controls the first cooler 240-1 and the second cooler 240-2 to be turned on for a certain period of time so that the gas particles of the new odor measurement target are stably adsorbed onto the surface of the odor sensor 220, and then, as shown in FIG. 10, the first valve 231, the second valve 232, and the third valve 233 are controlled to be closed so that only the gas of the new odor measurement target remains in the odor sensor chamber 210, thereby allowing the odor measurement process of the odor sensor 220 to be performed accurately.

[0091] According to another embodiment of the present invention, pre-heated clean air is supplied to the inside of odor sensor chamber 210, so that gas particles of the previous odor measurement target remaining inside odor sensor chamber 210 and on the surface of odor sensor 220 are cleaned by the pre-heated clean air, and at the same time, the heating process for odor sensor 220 allows the gas particles of the previous odor measurement target to be easily desorbed from the surface of odor sensor 220, and then a new odor measurement target gas is pre-cooled and supplied to odor sensor chamber 210, and the cooling process for odor sensor 220 allows the gas particles of the new odor measurement target to be easily adsorbed to the surface of odor sensor 220, thereby improving the measurement accuracy of the odor sensor.

[0092] Meanwhile, the odor measuring device of the present invention can be installed not only in vehicles but also in future mobilities such as PBVs (Purpose Built Vehicles) and UAMs (Urban Air Mobility) to measure various odors generated in vehicles and mobilities, thereby enabling a clear analysis of the actual cause of bad odors based on the measured odor data, and contributing to improving the perceived quality of odors in various vehicles and future mobilities.

[0093] In addition, by mounting the odor measuring device of the present invention on a robot that can easily access various industrial sites (e.g., industrial sites where gas leaks or odor leaks have occurred), the components and concentrations of odors generated at various industrial sites can be accurately measured, greatly expanding the scope of use of robots. Although the present invention has been described in detail above with reference to various embodiments, the scope of the present invention is not limited to the above embodiments, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the claims below are also included in the scope of the present invention. [Explanation of symbols]

[0094] 10 Odor sensor chamber 12 Gas inlet 14 Gas exhaust port 20 Odor Sensor 100 Odor Sensor Chamber 101 Clean air supply port 102 Gas inlet 103 Gas exhaust port 110 Odor Sensor 121 First Valve 122 Second Valve 123 3rd valve 130 First heater 140 First Cooler 150 Controller 200 Pre-chamber 201 Clean air supply port 202 First gas inlet 203 First gas outlet 204 Gas flow tube 204-1 First gas flow pipe 204-2 Second gas flow tube 205 Connecting pipe 210 Odor Sensor Chamber 211 Second gas inlet 212 Second gas outlet 220 Odor Sensor 231 First Valve 232 Second Valve 233 3rd Valve 230-1 First heater 230-2 Second heater 240-1 First Cooler 240-2 2nd Cooler 250 Controller

Claims

1. an odor sensor chamber having a clean air supply port and a gas inlet formed on one side and a gas outlet formed on the other side; an odor sensor mounted inside the odor sensor chamber; A first valve attached to the clean air supply port; A second valve attached to the gas inlet; A third valve attached to the gas exhaust port; a first heater attached to the odor sensor chamber for heating the odor sensor; a first cooler attached to the odor sensor chamber for cooling the odor sensor; a controller that performs opening / closing control of the first valve, the second valve, and the third valve, and performs on / off control of the first heater and the first cooler; An odor measuring device comprising:

2. The controller includes: The odor measuring device described in claim 1, characterized in that after odor measurement by the odor sensor is completed, the first valve and the third valve are controlled to be open while the second valve is controlled to be closed in order to supply clean air inside the odor sensor chamber.

3. The controller includes: The odor measuring device of claim 2, characterized in that the odor measuring device is configured to control the first heater to be turned on after the odor measurement by the odor sensor is completed, so that heating the odor sensor desorbs gas particles that were previously the subject of odor measurement from the surface of the odor sensor.

4. The controller includes: The odor measuring device described in claim 1, characterized in that it is configured to control the second valve to be open while simultaneously controlling the first valve and the third valve to be closed in order to supply new gas to be measured for odor measurement inside the odor sensor chamber.

5. The controller includes: The odor measuring device according to claim 4, characterized in that the odor measuring device is configured to control the first cooler to be turned on so that cooling of the odor sensor causes new gas particles to be measured for odor to be adsorbed onto the surface of the odor sensor.

6. a step of completing odor measurement by the odor sensor installed in the odor sensor chamber; supplying clean air into the odor sensor chamber to remove gas particles from the previous odor measurement target; a step of turning on a first heater attached to an odor sensor chamber to heat the odor sensor in order to desorb gas particles of a previous odor measurement target from a surface of the odor sensor; a step of discharging the gas particles of the previous odor measurement target that have been detached from the surface of the odor sensor and the gas particles of the previous odor measurement target that have remained inside the odor sensor chamber to the outside of the odor sensor chamber by the clean air; An odor measuring method comprising:

7. The odor measurement method according to claim 6, further comprising a step of turning on a first cooler attached to the odor sensor chamber to cool the odor sensor when new gas to be measured for odor is supplied into the odor sensor chamber so that gas particles of the new odor measurement target are adsorbed onto the surface of the odor sensor.

8. a pre-chamber having a clean air supply port and a first gas inlet formed on one side thereof and a first gas exhaust port formed on the other side thereof; a gas flow pipe connected between the clean air supply port and the first gas inlet and the first gas outlet; an odor sensor chamber having a second gas inlet formed on one side and a second gas outlet formed on the other side; a connecting pipe connected between the first gas outlet and the second gas inlet; an odor sensor mounted inside the odor sensor chamber; A first valve attached to the clean air supply port; a second valve attached to the first gas inlet; a third valve attached to the second gas exhaust port; a temperature adjusting unit mounted in the pre-chamber to adjust a temperature of the gas passing through the gas flow pipe; a controller that performs opening / closing control of the first valve, the second valve, and the third valve, and performs on / off control of the temperature adjustment unit; An odor measuring device comprising:

9. The temperature control unit is a second heater mounted in the pre-chamber for heating gas passing through the gas flow tube; a second cooler mounted in the pre-chamber for cooling gas passing through the gas flow tube; 9. The odor measuring device according to claim 8, characterized in that it is configured as follows:

10. The controller includes: The odor measuring device described in claim 9, characterized in that after the odor measurement by the odor sensor is completed, the first valve and the third valve are controlled to be open while the second valve is controlled to be closed in order to supply clean air to the inside of the odor sensor chamber through the gas flow pipe.

11. The controller includes:

11. The odor measuring device according to claim 10, further comprising a control for turning on the second heater so that the clean air flowing through the gas flow pipe is heated.

12. The controller includes: The odor measuring device described in claim 9, characterized in that it is configured to control the second valve to be open while simultaneously controlling the first valve and the third valve to be closed in order to supply new gas to be measured to the inside of the odor sensor chamber through the gas flow pipe.

13. The controller includes:

13. The odor measuring device according to claim 12, further configured to control the second cooler to be turned on so that new odor measurement target gas flowing through the gas flow pipe is cooled.

14. a first heater that is installed in the odor sensor chamber for heating the odor sensor and is controlled to be turned on / off by the controller; a first cooler that is installed in the odor sensor chamber to cool the odor sensor and is controlled to be turned on / off by the controller; The odor measuring device according to claim 8, further comprising:

15. The controller includes: The odor measuring device of claim 14, characterized in that it is configured to control the first heater to be turned on after the odor measurement by the odor sensor is completed, so that heating the odor sensor desorbs gas particles that were previously the subject of odor measurement from the surface of the odor sensor.

16. The controller includes: The odor measuring device according to claim 14, characterized in that the odor measuring device is configured to control the first cooler to be turned on so that cooling of the odor sensor causes new gas particles to be measured for odor to be adsorbed onto the surface of the odor sensor.

17. a step of completing odor measurement by the odor sensor installed in the odor sensor chamber; supplying clean air to a gas flow pipe of a pre-chamber communicably connected to the odor sensor chamber; turning on a second heater mounted in the pre-chamber to heat the clean air flowing through the gas flow pipe; The heated clean air enters the odor sensor chamber to desorb gas particles of the previous odor measurement target from the surface of the odor sensor; a step of discharging the gas particles of the previous odor measurement target that have been detached from the surface of the odor sensor and the gas particles of the previous odor measurement target that have remained inside the odor sensor chamber to the outside of the odor sensor chamber by the clean air; An odor measuring method comprising:

18. The odor measurement method according to claim 17, further comprising a step of turning on a first heater attached to the odor sensor chamber to heat the odor sensor so that gas particles previously subject to odor measurement are desorbed from the surface of the odor sensor.

19. The odor measurement method of claim 17, further comprising a step of turning on a second cooler mounted in the pre-chamber to cool the new odor measurement target gas flowing through the gas flow pipe when new odor measurement target gas is supplied into the odor sensor chamber through the gas flow pipe of the pre-chamber so that gas particles of the new odor measurement target are adsorbed onto the surface of the odor sensor.

20. The odor measurement method according to claim 19, further comprising a step of turning on a first cooler attached to the odor sensor chamber to cool the odor sensor so that new gas particles to be measured are adsorbed onto the surface of the odor sensor.

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