Unpleasant odor detection method, inspection method, program, and unpleasant detection system

Abstract

To provide an offensive odor detection method capable of improving the determination accuracy of the inspection target regarding the occurrence of unpleasant odors.SOLUTION: The unpleasant odor detection method is executed by an unpleasant odor detection system. The unpleasant odor detection method includes a first acquisition step, a second acquisition step, and a determination step. The first acquisition step includes acquiring a first detection value of odor components from a first sensor 81 that detects odor components passing through a first vent 701 among the multiple ventilation openings 700 of the inspection target having multiple ventilation openings 700 connecting the internal space S1 and the external space S2. The second acquisition step includes the acquisition of a second detection value of the odor components from a second sensor 82 that detects odor components passing through a second vent 702 among the multiple vents 700. The determination step includes determining whether or not an abnormal odor occurs at the inspection target based on the difference between the first detection value and the second detection value.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure generally relates to a strange odor detection method, an inspection method, a program, and a strange odor detection system. More specifically, the present disclosure relates to a strange odor detection method, an inspection method, a program, and a strange odor detection system for detecting the occurrence of a strange odor in an object to be inspected.

Background Art

[0002] Patent Document 1 discloses a cubicle automatic security inspection system. In Patent Document 1, it is exemplified that a cubicle device has an odor unit having an odor detection unit disposed inside for detecting odor as a measurement value, and an odor information output unit for outputting odor information of the detected odor via a network.

[0003] Also, in Patent Document 1, it is considered that the odor sensor may be provided at only one location inside the cubicle, but it may also be provided dispersedly at a plurality of locations. In the case of dispersed installation, it is preferable to arrange it near the cable targeted by the odor sensor or at a position assumed to be the flow path of the smoke when smoke occurs. In this case, it is described that it is preferable to configure the alarm output device to include a database by associating the targeted cable or cable part with the device identification information of the odor sensor.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In devices such as cubicles (cubicle-type high-voltage power receiving equipment), it is desired to improve the determination accuracy regarding the presence or absence of the generation of a strange odor.

[0006] An object of the present disclosure is to improve the determination accuracy regarding the presence or absence of generation of abnormal odor in an object to be inspected.

Means for Solving the Problem

[0007] The abnormal odor detection method according to one aspect of the present disclosure is executed by an abnormal odor detection system. The abnormal odor detection method includes a first acquisition step, a second acquisition step, and a determination step. The first acquisition step includes acquiring a first detection value of the odor component from a first sensor that detects the odor component passing through a first vent among the plurality of vents of the object to be inspected having a plurality of vents connecting an internal space and an external space. The second acquisition step includes acquiring a second detection value of the odor component from a second sensor that detects the odor component passing through a second vent among the plurality of vents. The determination step includes determining the presence or absence of generation of abnormal odor in the object to be inspected based on the difference between the first detection value and the second detection value.

[0008] The inspection method according to one aspect of the present disclosure includes automatically executing the abnormal odor detection method at predetermined intervals.

[0009] The inspection method according to one aspect of the present disclosure includes executing the abnormal odor detection method in response to an instruction from outside the abnormal odor detection system.

[0010] A program according to one aspect of the present disclosure is a program that causes one or more processors included in the abnormal odor detection system to execute the abnormal odor detection method.

[0011] A program according to one aspect of the present disclosure is a program that causes one or more processors included in the abnormal odor detection system to execute the inspection method.

[0012] An odor detection system according to an aspect of the present disclosure includes a first acquisition unit, a second acquisition unit, and a determination unit. The first acquisition unit acquires a first detection value of an odor component from a first sensor that detects the odor component passing through a first vent among the plurality of vents of an inspection target having a plurality of vents connecting an internal space and an external space. The second acquisition unit acquires a second detection value of the odor component from a second sensor that detects the odor component passing through a second vent among the plurality of vents. The determination unit determines the presence or absence of the occurrence of an abnormal odor in the inspection target based on the difference between the first detection value and the second detection value.

Advantages of the Invention

[0013] According to the present disclosure, there is an advantage that the determination accuracy regarding the presence or absence of the occurrence of an abnormal odor in the inspection target can be improved.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0015] Hereinafter, an odor detection method, an inspection method, a program, and an odor detection system according to embodiments of the present disclosure will be described with reference to the accompanying drawings. However, each of the following embodiments is only a part of various embodiments of the present disclosure. Each of the following embodiments can be variously modified according to design and the like as long as the object of the present disclosure can be achieved. Also, each drawing described in each of the following embodiments is a schematic diagram, and the ratio of the size and thickness of each component in the drawing does not necessarily reflect the actual dimensional ratio.

[0016] (1) Embodiment The odor detection method of this embodiment is executed by an odor detection system 100. The odor detection system 100 is a system that detects the presence or absence of the generation of an odor at an inspection target.

[0017] (1.1) Inspection Target The inspection target in the present disclosure is equipment that receives high-voltage electricity. The inspection target in the present disclosure is, for example, equipment that receives 6600V high-voltage electricity supplied from a distribution substation, and more specifically, a cubicle-type high-voltage power receiving facility (hereinafter, also simply referred to as a "cubicle") 7 prepared by an operator who conducts a high-voltage electricity receiving contract.

[0018] As shown in FIG. 1, in the cubicle 7, for example, inside a metal box (hereinafter, also referred to as a "housing") 70, there are a transformer that transforms voltage, instruments for measuring the electrical quantities at various locations in the cubicle 7 (transformers for power supply and demand meters, ammeters for power supply and demand meters, etc.), switches for opening and closing circuits (high-voltage AC load switches, high-voltage circuit breakers, heaters, etc.), protection devices (overcurrent relays, ground fault relays, lightning arresters, etc.), and various other devices 71 are housed. Also, in the cubicle 7, the above various devices 71 are connected by a cable 72 inside the housing 70.

[0019] Here, in cubicle 7, due to insulation deterioration of cable 72 or loosening of screws or bolts at the connection points connecting cable 72 and equipment 71, an overcurrent may flow through cable 72 or the connection points. When an overcurrent flows through cable 72 or the connection points, cable 72 or its surrounding area may be heated and burned out. Therefore, the Electricity Business Act obliges the operator installing cubicle 7 to establish safety regulations, select a chief electrical engineer, conduct monthly inspections once a month or twice a month, and conduct annual inspections once a year or once every three years. However, in recent years, there has been a problem of a shortage of personnel such as chief electrical engineers and inspectors who undertake inspection work.

[0020] Therefore, in the present disclosure, there is provided an odor detection method that can assist or substitute for the inspection of the presence or absence of abnormal odors included in the monthly inspection items of cubicle 7, and an odor detection system 100 capable of executing the odor detection method.

[0021] As shown in FIG. 1, the cubicle 7 to be inspected includes a housing 70, various devices 71 such as a transformer and a switch, and a cable 72 connecting between the devices 71.

[0022] The housing 70 is, for example, a hollow rectangular parallelepiped shape. The housing 70 has an internal space S1. Further, a plurality of ventilation openings 700 are provided in the housing 70. That is, the cubicle 7 (the object to be inspected) has a plurality of ventilation openings 700. Each of the plurality of ventilation openings 700 connects the internal space S1 of the housing 70 and the external space S2. Through the plurality of ventilation openings 700, heat, odor components, etc. generated in the internal space S1 of the housing 70 are discharged to the external space S2.

[0023] The plurality of vents 700 are provided at different positions in the housing 70. The plurality of vents 700 include a first vent 701 and a second vent 702. Here, the first vent 701 is provided at the upper end of the left side wall of the housing 70. Also, the second vent 702 is provided at the lower end of the front side wall of the housing 70. One of the first vent 701 and the second vent 702 may be provided above the vertical center of the housing 70, and the other of the first vent 701 and the second vent 702 may be provided below the vertical center of the housing 70. By providing the first vent 701 and the second vent 702 separately above and below the vertical center of the housing 70, the discharge of heat, odor components, etc. generated by various devices 71 and the like to the external space S2 is promoted.

[0024] Note that which of the first vent 701 and the second vent 702 is the intake side and which is the exhaust side can vary depending on the conditions of the location where the housing 70 is installed. For example, under the condition that the ground G1 where the housing 70 is installed is warmer than the ceiling, the first vent 701 can be the intake side and the second vent 702 can be the exhaust side. Conversely, under the condition that the ground G1 is cooler than the ceiling, the first vent 701 can be the exhaust side and the second vent 702 can be the intake side. In any case, the air passing through the internal space S1 of the housing 70 can flow in from one of the first vent 701 and the second vent 702 (the intake side), pass through the internal space S1, and flow out from the other of the first vent 701 and the second vent (the exhaust side). In FIG. 1, the flow of air passing through the vent 700 is indicated by dotted arrows.

[0025] As shown in FIG. 1, a first sensor 81 and a second sensor 82 are arranged in the housing 70.

[0026] The first sensor 81 is a gas sensor that detects odor components passing through the first vent 701. The odor components to be detected by the first sensor 81 include gases generated by abnormal heating due to deterioration of the insulation coating of the cable 72 or internal damage to the cable 72 itself in the internal space S1 of the housing 70. The odor components to be detected by the first sensor 81 may include at least one of hydrogen chloride gas, ammonia gas, formaldehyde, and carbon monoxide gas. In one specific example, when the cable 72 is a PVC (Polyvinyl Chloride) cable, the odor components to be detected by the first sensor 81 may include hydrogen chloride gas.

[0027] The first sensor 81 is arranged at a position where it can detect odor components passing through the first vent 701. Here, the first sensor 81 is arranged at the first vent 701. However, it is not limited to this, and the first sensor 81 may be arranged near the first vent 701 outside the housing 70, or may be arranged near the first vent 701 inside the housing 70.

[0028] The second sensor 82 is a gas sensor that detects odor components passing through the second vent 702. The odor components to be detected by the second sensor 82 include gases generated by abnormal heating due to deterioration of the insulation coating of the cable 72 or internal damage to the cable 72 itself in the internal space S1 of the housing 70. The odor components to be detected by the second sensor 82 are the same as those to be detected by the first sensor 81.

[0029] The second sensor 82 is arranged at a position where it can detect odor components passing through the second vent 702. Here, the second sensor 82 is arranged at the second vent 702. However, it is not limited to this, and the second sensor 82 may be arranged near the second vent 702 outside the housing 70, or may be arranged near the second vent 702 inside the housing 70.

[0030] (1.2) Abnormal odor detection method As described above, the malodor detection method is executed by the malodor detection system 100. As shown in FIG. 2, the malodor detection system 100 includes a processing unit 10, a first communication unit 11, and a second communication unit 12.

[0031] The first communication unit 11 is a communication interface. The first communication unit 11 is connected to the first sensor 81 and communicates with the first sensor 81. A detection value of an odor component detected by the first sensor 81 is transmitted from the first sensor 81 to the first communication unit 11.

[0032] The second communication unit 12 is a communication interface. The second communication unit 12 is connected to the second sensor 82 and communicates with the second sensor 82. A detection value of an odor component detected by the second sensor 82 is transmitted from the second sensor 82 to the second communication unit 12. The first communication unit 11 and the second communication unit 12 may be shared by one communication interface.

[0033] The processing unit 10 can be realized by, for example, a computer system including one or more processors (microprocessors) and one or more memories. By one or more processors executing one or more programs stored in one or more memories, the processing unit 10 functions. Here, the program is recorded in advance in the memory of the processing unit 10, but may be provided by being recorded through an electric communication line such as the Internet or a non-temporary recording medium such as a memory card.

[0034] As shown in FIG. 2, the processing unit 10 includes a first acquisition unit 101, a second acquisition unit 102, and a determination unit 103. Each element included in the processing unit 10 does not have a physical entity, but indicates a function realized by the processing unit 10.

[0035] The first acquisition unit 101 performs a first acquisition step ST1 (see FIG. 3). The first acquisition step ST1 is a step of acquiring a first detection value of an odor component from the first sensor 81. In the first acquisition step ST1, the first acquisition unit 101 acquires the detection value of the odor component detected by the first sensor 81 and received by the first communication unit 11 as the first detection value.

[0036] The second acquisition unit 102 performs a second acquisition step ST2 (see FIG. 3). The second acquisition step ST2 is a step of acquiring a second detection value of the odor component from the second sensor 82. In the second acquisition step ST2, the second acquisition unit 102 acquires the detection value of the odor component detected by the second sensor 82 and received by the second communication unit 12 as the second detection value.

[0037] The determination unit 103 performs a determination step ST3. The determination step ST3 is a step of determining the presence or absence of the generation of an abnormal odor in the cubicle 7 based on the difference between the first detection value and the second detection value.

[0038] As shown in FIG. 2, the determination unit 103 includes a difference calculation unit 104 and a comparison determination unit 105. Further, as shown in FIG. 4, the determination step ST3 includes a difference calculation step ST11 and a comparison determination step ST12.

[0039] The difference calculation unit 104 performs a difference calculation step ST11. The difference calculation step ST11 includes calculating the absolute value of the difference between the first detection value and the second detection value. In the difference calculation step ST11, the difference calculation unit 104 calculates, for example, the absolute value of the difference between the detection values (the first detection value and the second detection value) of the odor components detected by the first sensor 81 and the second sensor 82 at the same time. However, it is not limited to this. In the difference calculation step ST11, the difference calculation unit 104 may use the detection values (the first detection value and the second detection value) of the odor components detected by the first sensor 81 and the second sensor 82 at detection times when the time difference between the respective detection times falls within a predetermined allowable time, and calculate the absolute value of the difference between these detection values. The allowable time is, for example, the time it takes for the air flowing into the housing 70 from one of the first vent 701 and the second vent 702 to flow out from the other of the first vent 701 and the second vent 702 through the internal space S1. It is not particularly limited, but can be, for example, about 1 minute. Alternatively, in the difference calculation step ST11, the difference calculation unit 104 may use the average value of the detection values of the odor components detected by the first sensor 81 for a predetermined time as the first detection value, and the average value of the detection values of the odor components detected by the second sensor 82 for a predetermined time as the second detection value, and calculate the absolute value of the difference between these. The predetermined time is not particularly limited, but can be, for example, a time within the range of 10 seconds to 10 minutes.

[0040] The comparison and determination unit 105 performs a comparison and determination step ST12. The comparison and determination step ST12 includes comparing the absolute value calculated in the difference calculation step ST11 with a threshold value, and making a determination about the presence or absence of an abnormal odor based on the comparison result. In the comparison and determination step ST12, when the calculated absolute value is smaller than the threshold value, the comparison and determination unit 105 determines that no abnormal odor is occurring in the cubicle 7. In the comparison and determination step ST12, when the calculated absolute value is equal to or greater than the threshold value, the comparison and determination unit 105 determines that an abnormal odor is occurring in the cubicle 7.

[0041] Here, in cubicle 7, there may be an element that generates the odor components to be detected by the first sensor 81 and the second sensor 82 near cubicle 7 in the external space S2 of cubicle 7. For example, it is the case when cubicle 7 is used in a factory where odor components to be detected by the first sensor 81 and the second sensor 82 may be generated. Also, in cubicle 7, there may be an element that generates a gas (so-called interference gas) that is not the detection target of the first sensor 81 and the second sensor 82 but is unintentionally detected by the first sensor 81 and the second sensor 82 near cubicle 7 in the external space S2 of cubicle 7. In such a case, even if an odor component is detected by the first sensor 81 and the second sensor 82, the odor component (or interference gas) may be an odor component (or interference gas) generated in the external space S2 and not generated by the heating of the cable 72. That is, if the presence or absence of abnormal odor generation is determined simply using the detection value of the first sensor 81 (the first detection value) or the detection value of the second sensor 82 (the second detection value), there is a possibility of misjudging that an odor component is generated even though no odor component is generated inside cubicle 7.

[0042] In contrast, in the abnormal odor detection method of this embodiment, in the determination step ST3, based on the difference between the first detection value and the second detection value, it is determined whether or not an abnormal odor is generated in the cubicle 7. Suppose an odor component (or interfering gas) is generated in the external space S2 of the cubicle 7. In that case, the odor component (or interfering gas) passes through the intake vent 700, the internal space S1 of the housing 70, and the exhaust vent 700, so it will be detected by both the first sensor 81 and the second sensor 82. Therefore, the difference between the first detection value and the second detection value becomes a relatively small value. On the other hand, when an odor component is generated in the internal space S1 of the cubicle 7, the odor component is mainly detected by the sensor arranged at the exhaust vent 700 (the first vent 701 or the second vent 702) among the first sensor 81 and the second sensor 82. Therefore, the difference between the first detection value and the second detection value becomes a relatively large value. Therefore, by appropriately setting the threshold value compared with the difference in the comparison determination step ST12, it is possible to correctly determine whether the detected gas is generated in the external space S2 (when the difference < threshold value) or in the internal space S1 (when the difference ≥ threshold value). Thereby, it is possible to suppress false determination caused by the gas generated in the external space S2.

[0043] Thus, according to the abnormal odor detection method of this embodiment, by determining whether or not an abnormal odor is generated in the cubicle 7 based on the difference between the first detection value and the second detection value, it is possible to suppress the influence of the odor component (interfering gas) generated in the external space S2 and improve the determination accuracy regarding the presence or absence of an abnormal odor in the inspection target.

[0044] The comparison determination unit 105 may compare the absolute value calculated in the difference calculation step ST11 with a plurality of threshold values in the comparison determination step ST12. Thereby, it becomes possible to determine the degree of generation of the odor component in a plurality of stages.

[0045] As shown in FIG. 2, the abnormal odor detection system 100 further includes a third communication unit 13. Also, the processing unit 10 of the abnormal odor detection system 100 further includes a notification unit 109.

[0046] The third communication unit 13 is a communication interface. The third communication unit 13 is communicably connected to an external device 9 via a network NT1 such as the Internet.

[0047] The notification unit 109 notifies the external device 9 of the result information regarding the determination result by the determination unit 103 via the third communication unit 13. The external device 9 to which the result information is notified may include, for example, an information terminal of an electrical safety association in the area to which the facility where the cubicle 7 is installed belongs, an information terminal of a power company in the same area, an information terminal of a selected chief electrical engineer, an information terminal of a facility administrator, and the like. The notification destination of the determination result may be appropriately added and deleted.

[0048] The content of the result information notified by the notification unit 109 is not limited to the determination result itself, and various information may be included according to the notification destination. For example, when the notification destination is an information terminal of an inspector who performs monthly inspections, the result information may include an instruction to pay attention to the inspection of abnormal odors during the next monthly inspection.

[0049] In this way, by notifying the external device 9 of the determination result by the determination unit 103, the person in charge of the notification destination can confirm that an abnormal odor is occurring in the cubicle 7 and can take appropriate measures.

[0050] Note that the abnormal odor detection system 100 may include the first sensor 81 and the second sensor 82 as components.

[0051] (1.3) Inspection method In the odor detection system 100 of the present embodiment, the processing unit 10 automatically executes the above-described odor detection method (the first acquisition step ST1, the second acquisition step ST2, and the determination step ST3) at predetermined intervals. For example, the processing unit 10 has a timekeeping function such as an RTC (Real Time Clock) or a timer. When a predetermined time is measured by the RTC or when it is measured by the timer that a predetermined time has elapsed since the odor detection method was last performed, the odor detection method is automatically executed. The "predetermined period" is not particularly limited, but can be, for example, a period within the range of 1 minute to 1 day. In short, the inspection method of the cubicle 7 of the present embodiment includes automatically executing the odor detection method at predetermined intervals. In this way, the reliability of odor detection is improved by the odor detection method being automatically executed regularly. Also, it becomes possible to use the implementation of the odor detection method of the present embodiment instead of the inspection of the presence or absence of odor included in the inspection items of the monthly inspection, and as a result, it also leads to a reduction in the burden on the inspector.

[0052] In the odor detection system 100 of the present embodiment, the notification unit 109 notifies the external device 9 of the result information each time the odor detection method is performed. However, not limited to this, the notification unit 109 may notify the result information for a plurality of times (for example, when the detection operation is performed a plurality of times in a day, the result information for one day) in a lump.

[0053] Also, the odor detection system 100 may have a function of performing the odor detection method in response to an instruction from the outside (external device 9). That is, the inspection method may include performing the odor detection method in response to an instruction from the outside. For example, when the inspector performs the monthly inspection, the odor detection system 100 may execute the odor detection method in response to an instruction from the inspector's information terminal. Thereby, it may be possible to inspect the presence or absence of odor without the inspector actually opening the door of the housing 70 and checking the presence or absence of odor inside the cubicle 7, which helps with the inspection of the presence or absence of odor included in the inspection items of the monthly inspection, and as a result, leads to a reduction in the burden on the inspector.

[0054] (2) Modification The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be variously modified according to design and the like as long as the object of the present disclosure can be achieved. Further, functions similar to the strange odor detection method and the inspection method according to the above-described embodiment may be embodied by a computer program or a non-transitory recording medium on which the computer program is recorded, and the like.

[0055] Specifically, a program according to one aspect is a program that causes one or more processors (processing unit 10) included in the strange odor detection system 100 to execute the above-described strange odor detection method. Further, a program according to one aspect is a program that causes one or more processors (processing unit 10) included in the strange odor detection system 100 to execute the above-described inspection method.

[0056] Hereinafter, modification examples of the embodiment will be listed. The above-described embodiment and the modification examples described below can be applied in appropriate combination. In the description of each of the following modification examples, the description of the same configuration as that of the above-described embodiment may be omitted as appropriate.

[0057] The processing unit 10 in the present disclosure includes a computer system. The computer system mainly includes a processor and a memory as hardware. By the processor executing a program recorded in the memory of the computer system, the functions as the processing unit 10 in the present disclosure are realized. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunication line, or may be provided by being recorded on a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive readable by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). Here, integrated circuits such as the IC or LSI have different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, for an FPGA (Field-Programmable Gate Array) programmed after the manufacture of the LSI, or a logic device capable of reconfiguring the bonding relationship inside the LSI or reconfiguring the circuit section inside the LSI, it can also be adopted as a processor. The one or more electronic circuits may be integrated on one chip, or may be provided distributed on a plurality of chips. The plurality of chips may be integrated in one device, or may be provided distributed in a plurality of devices. The computer system here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0058] Also, it is not an essential configuration that a plurality of functions in the processing unit 10 are aggregated within one housing. The components of the processing unit 10 may be provided in a distributed manner in a plurality of housings. Conversely, a plurality of functions in the processing unit 10 may be aggregated within one housing. Further, at least some functions of the processing unit 10 may be realized by a cloud (cloud computing) or the like.

[0059] (2.1) Modification Example 1 The abnormal odor detection method and the abnormal odor detection system 100 of Modification Example 1 will be described with reference to FIGS. 5 and 6.

[0060] As shown in FIG. 5, the processing unit 10 of the abnormal odor detection system 100 of Modification Example 1 includes a first acquisition unit 101, a second acquisition unit 102, a determination unit 103, and a notification unit 109, and further includes a first reference setting unit 111 and a second reference setting unit 112.

[0061] The first reference setting unit 111 performs a first reference setting step ST21 (see FIG. 6). The first reference setting step ST21 is a step of setting the detection value of the odor component detected by the first sensor 81 during normal times as the first reference value. "During normal times" means a state where no abnormal odor component is generated in the internal space S1 of the cubicle 7 and no abnormal odor component or interfering gas is generated in the external space S2 of the cubicle 7. "During normal times" may be, for example, at the initial installation of the cubicle 7 or at the time of inspection such as monthly inspection or annual inspection of the cubicle 7. In the first reference setting step ST21, the first reference setting unit 111 acquires the detection value of the odor component detected by the first sensor 81 during normal times and received by the first communication unit 11 as the first reference value.

[0062] The second reference setting unit 112 performs the second reference setting process ST22. The second reference setting process ST22 is a process of setting the detection value of the odor component detected by the second sensor 82 during normal operation as the second reference value. In the second reference setting process ST22, the second reference setting unit 112 acquires, as the second reference value, the detection value of the odor component detected by the second sensor 82 during normal operation and received by the second communication unit 12. The "normal operation" regarding the second reference setting process ST22 may be the same as the "normal operation" regarding the first reference setting process ST21.

[0063] Note that the first reference value may be the average value of the detection values of the odor component detected by the first sensor 81 over a predetermined period. Also, the second reference value may be the average value of the detection values of the odor component detected by the second sensor 82 over a predetermined period. The predetermined period is not particularly limited, but can be, for example, a time within the range of 10 seconds to 10 minutes.

[0064] The first acquisition unit 101 performs the first acquisition process ST23 (see FIG. 6). The second acquisition unit 102 performs the second acquisition process ST24 (see FIG. 6). Since the first acquisition process ST23 and the second acquisition process ST24 are the same as the first acquisition process ST1 and the second acquisition process ST2 of the above embodiment, respectively, the description thereof is omitted.

[0065] As shown in FIG. 5, the determination unit 103 of this modification includes a difference calculation unit 104 and a comparison determination unit 105, and further includes a first calculation unit 106 and a second calculation unit 107. Also, as shown in FIG. 7, the determination process ST25 performed by the determination unit 103 includes a first calculation process ST31, a second calculation process ST32, a difference calculation process ST33, and a comparison determination process ST34.

[0066] The first calculation unit 106 performs the first calculation process ST31. The first calculation process ST31 includes calculating the difference between the first detection value and the first reference value as the first difference value.

[0067] The second calculation unit 107 performs the second calculation process ST32. The second calculation process ST32 includes calculating the difference between the second detection value and the second reference value as the second difference value.

[0068] The difference calculation unit 104 performs a difference calculation step ST33. The difference calculation step ST33 includes calculating the absolute value of the difference between the first difference value and the second difference value.

[0069] The comparison determination unit 105 performs a comparison determination step ST34. The comparison determination step ST34 includes comparing the calculated absolute value (the absolute value of the difference between the first difference value and the second difference value) with a threshold value, and making a determination about the presence or absence of an abnormal odor based on the comparison result. In the comparison determination step ST34, when the calculated absolute value is smaller than the threshold value, the comparison determination unit 105 determines that no abnormal odor is occurring in the cubicle. In the comparison determination step ST34, when the calculated absolute value is greater than or equal to the threshold value, the determination unit 103 determines that an abnormal odor is occurring in the cubicle 7. In short, the determination step S21 performed by the determination unit 103 includes determining the presence or absence of an abnormal odor in the cubicle 7 based on the difference between the first difference value and the second difference value.

[0070] Also in the abnormal odor detection method and the abnormal odor detection system 100 of this modification example, it is possible to suppress the influence of odor components (interference gases) generated in the external space S2 and improve the determination accuracy regarding the presence or absence of an abnormal odor in the inspection target.

[0071] Further, in the abnormal odor detection method and the abnormal odor detection system 100 of this modification example, a first reference value is set as the offset value of the first detection value, and a second reference value is set as the offset value of the second detection value. Thereby, the number of digits of the numerical value used by the determination unit 103 in the processing can be suppressed, so that the possibility of occurrence of problems such as overflow can be reduced.

[0072] (2.2) Modification Example 2 The abnormal odor detection method and the abnormal odor detection system 100 of modification example 2 will be described with reference to FIG. 8.

[0073] In this modification example, as shown in FIG. 8, a temperature sensor is provided in the housing 70 of the cubicle 7. Here, the temperature sensor includes a first temperature sensor 61 provided at the first vent 701 and a second temperature sensor 62 provided at the second vent 702. The processing unit 10 has a function of determining the occurrence of an abnormality in the cubicle 7 based on, for example, the determination result by the determination unit 103 and the measurement results of the first temperature sensor 61 and the second temperature sensor 62. As a result, the abnormal odor detection system 100 can assist or substitute for the confirmation of the presence or absence of an abnormal temperature rise of the device 71 included in the inspection items of the monthly inspection of the cubicle 7, leading to a reduction in the burden on the inspector.

[0074] Also, by detecting both the temperature rise and the generation of odor components, the determination accuracy of the occurrence of an abnormality in the inspection target is improved.

[0075] (3) Aspect As is clear from the embodiments and modification examples described above, the following aspects are disclosed in this specification.

[0076] The abnormal odor detection method of the first aspect is executed by the abnormal odor detection system (100). The abnormal odor detection method includes a first acquisition step (ST1, ST23), a second acquisition step (ST2, ST24), and a determination step (ST3, ST25). The first acquisition step (ST1, ST23) includes acquiring a first detection value of an odor component from a first sensor (81) that detects an odor component passing through a first vent (701) among a plurality of vents (700) of an inspection target having a plurality of vents (700) connecting an internal space (S1) and an external space (S2). The second acquisition step (ST2, ST24) includes acquiring a second detection value of an odor component from a second sensor (82) that detects an odor component passing through a second vent (702) among the plurality of vents (700). The determination step (ST3, ST25) includes determining the presence or absence of the occurrence of an abnormal odor in the inspection target based on the difference between the first detection value and the second detection value.

[0077] According to this aspect, the determination accuracy regarding the presence or absence of the occurrence of an abnormal odor in the inspection target can be improved.

[0078] In the abnormal odor detection method of the second aspect, in the first aspect, the inspection target is cubicle type high voltage power receiving equipment.

[0079] According to this aspect, it is possible to improve the determination accuracy regarding the presence or absence of the generation of abnormal odor in the cubicle (7).

[0080] In the abnormal odor detection method of the third aspect, in the first or second aspect, the odor component includes a gas generated by abnormal heating accompanying insulation coating deterioration of the cable (72) or internal damage of the cable (72) itself in the internal space (S1) of the inspection target.

[0081] According to this aspect, it is possible to improve the determination accuracy regarding the presence or absence of the generation of abnormal heating of the cable (72) in the inspection target.

[0082] The abnormal odor detection method of the fourth aspect further includes a first reference setting step (ST21) and a second reference setting step (ST22) in any one of the first to third aspects. The first reference setting step (ST21) includes setting the detection value of the odor component detected by the first sensor (81) during normal operation as the first reference value. The second reference setting step (ST22) includes setting the detection value of the odor component detected by the second sensor (82) during normal operation as the second reference value. The determination step (ST3, ST25) includes a first calculation step (ST31) and a second calculation step (ST32). The first calculation step (ST31) includes calculating the difference between the first detection value and the first reference value as the first difference value. The second calculation step (ST32) includes calculating the difference between the second detection value and the second reference value as the second difference value. The determination step (ST3, ST25) includes determining the presence or absence of abnormal odor in the inspection target based on the difference between the first difference value and the second difference value.

[0083] According to this aspect, the first reference value is set as the offset value of the first detection value, and the second reference value is set as the offset value of the second detection value. Thereby, the number of digits of the numerical value used by the determination unit (103) for processing is suppressed, so that the possibility of occurrence of problems such as overflow can be reduced.

[0084] In the abnormal odor detection method according to the fifth aspect, the first reference value is the average value of the detection values of the odor components detected by the first sensor (81) over a predetermined period. The second reference value is the average value of the detection values of the odor components detected by the second sensor (82) over a predetermined period.

[0085] According to this aspect, since the number of digits of the numerical value used by the determination unit (103) for processing is suppressed, the possibility of occurrence of problems such as overflow can be reduced.

[0086] The inspection method according to the sixth aspect includes automatically executing the abnormal odor detection method according to any one of the first to fifth aspects at predetermined intervals.

[0087] According to this aspect, the reliability of abnormal odor detection is improved.

[0088] The inspection method according to the seventh aspect includes executing the abnormal odor detection method according to any one of the first to fifth aspects in response to an instruction from outside the abnormal odor detection system (100).

[0089] According to this aspect, convenience is improved.

[0090] The program according to the eighth aspect is a program that causes one or more processors included in the abnormal odor detection system (100) to execute the abnormal odor detection method according to any one of the first to fifth aspects.

[0091] According to this aspect, the determination accuracy regarding the presence or absence of the occurrence of abnormal odor in the inspection target can be improved.

[0092] The program according to the ninth aspect is a program that causes one or more processors included in the abnormal odor detection system (100) to execute the inspection method according to the sixth aspect.

[0093] According to this aspect, convenience is improved.

[0094] The program according to the tenth aspect is a program that causes one or more processors included in the abnormal odor detection system (100) to execute the inspection method according to the seventh aspect.

[0095] According to this aspect, convenience is improved.

[0096] The abnormal odor detection system (100) according to the eleventh aspect includes a first acquisition unit (101), a second acquisition unit (102), and a determination unit (103). The first acquisition unit (101) acquires a first detection value of an odor component from a first sensor (81) that detects an odor component passing through a first vent (701) among a plurality of vents (700) of an inspection target having a plurality of vents (700) connecting an internal space (S1) and an external space (S2). The second acquisition unit (102) acquires a second detection value of an odor component from a second sensor (82) that detects an odor component passing through a second vent (702) among the plurality of vents (700). The determination unit (103) determines the presence or absence of the occurrence of an abnormal odor in the inspection target based on the difference between the first detection value and the second detection value.

[0097] According to this aspect, it is possible to improve the determination accuracy regarding the presence or absence of the occurrence of an abnormal odor in the inspection target.

Explanation of Signs

[0098] 100 Abnormal odor detection system 101 First acquisition unit 102 Second acquisition unit 103 Determination unit 7 Cubicle 700 Vent 701 First vent 702 Second vent 72 Cable 81 First sensor 82 Second sensor S1 Internal space S2 External space ST1 First acquisition step ST2 Second acquisition step ST3 Determination step ST21 First reference setting step ST22 Second reference setting process ST23 First acquisition process ST24 Second acquisition process ST25 Judgment process ST31 First calculation process ST32 Second calculation process

Claims

1. An odor detection method executed by an odor detection system, comprising: a first acquisition step of acquiring a first detection value of an odor component from a first sensor that detects the odor component passing through a first vent among the plurality of vents of an object to be inspected having a plurality of vents connecting an internal space and an external space; a second acquisition step of acquiring a second detection value of the odor component from a second sensor that detects the odor component passing through a second vent among the plurality of vents; a determination step of determining whether or not an abnormal odor is generated in the object to be inspected based on a difference between the first detection value and the second detection value. An odor detection method.

2. The object to be inspected is cubicle type high voltage power receiving equipment. The odor detection method according to Claim 1.

3. The odor component includes a gas generated by abnormal heating accompanying insulation coating deterioration of a cable in the internal space of the object to be inspected or internal damage of the cable itself. The odor detection method according to Claim 1.

4. a first reference setting step of setting, as a first reference value, a detection value of the odor component detected by the first sensor during normal times; a second reference setting step of setting, as a second reference value, a detection value of the odor component detected by the second sensor during normal times; and further includes The determination step a first calculation step of calculating, as a first difference value, a difference between the first detection value and the first reference value; a second calculation step of calculating, as a second difference value, a difference between the second detection value and the second reference value; and includes The determination step includes determining whether or not an abnormal odor is present in the object to be inspected based on a difference between the first difference value and the second difference value. The odor detection method according to Claim 1.

5. The first reference value is an average value of detection values of the odor component detected by the first sensor over a predetermined period. The second reference value is an average value of detection values of the odor component detected by the second sensor over a predetermined period. The odor detection method according to Claim 4.

6. A inspection method, including automatically executing the odor detection method according to any one of Claims 1 to 5 at predetermined intervals. An inspection method.

7. A inspection method, including executing the odor detection method according to any one of Claims 1 to 5 in response to an instruction from outside the odor detection system. An inspection method.

8. A program for causing one or more processors included in the odor detection system to execute the odor detection method according to any one of Claims 1 to 5.

9. A program for causing one or more processors included in the abnormal odor detection system to execute the inspection method according to claim 6. **Claim 10** A program for causing one or more processors included in the abnormal odor detection system to execute the inspection method according to claim 7. **Claim 11** A first acquisition unit that acquires a first detection value of the odor component from a first sensor that detects an odor component passing through a first vent among the plurality of vents of an inspection target having a plurality of vents connecting an internal space and an external space; A second acquisition unit that acquires a second detection value of the odor component from a second sensor that detects the odor component passing through a second vent among the plurality of vents; A determination unit that determines whether or not an abnormal odor is generated in the inspection target based on a difference between the first detection value and the second detection value. An abnormal odor detection system.

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