Odor detection equipment

Abstract

The utility model discloses peculiar smell detection equipment which comprises a shell, a calibration gas channel, a detection gas channel, a gas detection device and a signal processing device, a gas inlet is formed in the shell, and the calibration gas channel is used for conducting filtering, peculiar smell adsorption, dehumidification and drying treatment on to-be-detected gas passing through the gas inlet to obtain first gas; the detection gas channel is used for filtering, dehumidifying and drying the to-be-detected gas after the calibration is completed to obtain a second gas; the gas inlet end of the gas detection device is connected with the gas outlet end of the detection gas channel and the gas outlet end of the calibration gas channel, and the gas detection device is used for generating a first detection signal and a second detection signal; and the signal processing device is used for calibrating the gas detection device according to the first detection signal and determining a gas parameter value of the gas to be detected according to the second detection signal. The anomaly detection equipment in the application does not need to be interfered by factors such as field environment conditions and sensors, and the accuracy of determining the gas parameter values is improved.

Description

Technical Field

[0001] The present application relates to the field of gas detection, and particularly to an odor detection device. Background Art

[0002] With the improvement of people's living standards, environmental pollution problems have received more and more attention. Among them, there is a type of environmental pollution, which is the emission of malodorous gases in different environmental areas, such as the odors and smells in production and living environments such as landfills, pig farms, sewage treatment plants, etc. Malodor refers to all gaseous substances that stimulate the olfactory organs, cause people discomfort, and damage the living environment, and can cause harm to different systems of the human body. For example, it can harm the respiratory system, digestive system, circulatory system, nervous system and its gas hazards, and can affect the metabolic activities of the body. In order to avoid harm to the human body, it is particularly important to detect malodors and other odors.

[0003] Currently, in the related art, an odor detection device is used to determine the size of the odor gas according to the olfactory organ experiment method. However, the traditional odor detection device is subject to the interference of factors such as the on-site environmental conditions and internal sensors, so that the concentration of a certain gas in the on-site environment is not proportional to the odor concentration, resulting in low detection accuracy. Utility Model Content

[0004] The purpose of the present application is to provide an odor detection device that is not subject to the interference of factors such as on-site environmental conditions and sensors, and improves the detection accuracy of gas odor.

[0005] To achieve the above object, the present application provides the following solutions:

[0006] In a first aspect, the present application provides an odor detection device, including:

[0007] A housing, on which an air inlet is provided;

[0008] A calibration airway, the air inlet is connected to the calibration airway, and the calibration airway is used to filter, odor adsorb, dehumidify and dry the gas to be measured entering through the air inlet to obtain a first gas;

[0009] A detection airway, the air inlet is also connected to the detection airway, and the detection airway is used to filter, dehumidify and dry the gas to be measured entering through the air inlet after the calibration through the calibration airway is completed to obtain a second gas;

[0010] A gas detection device, the gas detection device is located inside the housing, and the air inlet end of the gas detection device is respectively connected to the air outlet end of the detection airway and the air outlet end of the calibration airway. The gas detection device is used to detect the first gas, generate a first detection signal, and is used to detect the second gas, generate a second detection signal;

[0011] A signal processing device, electrically connected to a gas detection device, is configured to calibrate the gas detection device according to a first detection signal and to determine a gas parameter value of a gas to be measured according to a second detection signal.

[0012] Optionally, the calibration air duct is internally provided with:

[0013] A first filtering module for filtering impurities from the gas to be measured to obtain a first filtered gas;

[0014] A first processing module, with an intake end connected to the outlet end of the first filtering module, for adsorbing odors and dehumidifying the first filtered gas to obtain a first processed gas;

[0015] A first drying module, with an intake end connected to the outlet end of the first processing module, for drying the first processed gas to obtain a first gas.

[0016] Optionally, the detection air duct is internally provided with:

[0017] A second filtering module for filtering impurities from the gas to be measured to obtain a second filtered gas;

[0018] A second processing module, with an intake end connected to the outlet end of the second filtering module, for dehumidifying the second filtered gas to obtain a second processed gas;

[0019] A second drying module, with an intake end connected to the outlet end of the second processing module, for drying the second processed gas to obtain a second gas.

[0020] Optionally, both the first filtering module and the second filtering module are provided with dust-removing breathable membranes, the first processing module includes a carbon bead filtering device, the second processing module is provided with a desiccant, and both the first drying module and the second drying module are provided with waterproof breathable membranes.

[0021] Optionally, the odor detection device further includes: a switch assembly disposed between the outlet end of the calibration air duct, the outlet end of the detection air duct, and the gas detection device;

[0022] The switch assembly is configured to control the gas to be measured to flow through the calibration air duct to the gas detection device; or, the switch assembly is configured to control the gas to be measured to flow through the detection air duct to the gas detection device.

[0023] Optionally, the switch assembly includes a switch shaft and an adjusting member. The adjusting member is connected to the switch shaft. A through hole is provided on the switch shaft. The path of the gas to be measured flowing through the through hole is perpendicular to the line segment where the detection air passage is located and the line segment where the calibration air passage is located;

[0024] When the adjusting member is used to control the through hole of the switch shaft to communicate with the calibration air passage, the gas to be measured enters the calibration air passage; or when the through hole of the switch shaft is controlled to communicate with the detection air passage, the gas to be measured enters the calibration air passage.

[0025] Optionally, the gas detection device includes: an air chamber, a gas sensor, an air pump, and an air outlet. The gas sensor is located in the air chamber;

[0026] The air chamber is used to accommodate the first gas passing through the calibration air passage or the second gas passing through the detection air passage;

[0027] The gas sensor is used to detect the first gas, generate a first detection signal and send it to the signal processing device, and is also used to detect the second gas, generate a second detection signal and send it to the signal processing device;

[0028] The air pump is used to control the discharge of the first gas or the second gas through the air outlet.

[0029] Optionally, the odor detection device further includes a data storage device, and the data storage device is electrically connected to the signal processing device;

[0030] The data storage device is used to store the first detection signal, the second detection signal, and the gas parameter value.

[0031] Optionally, the odor detection device further includes: a display module and a power supply module; the display module is electrically connected to the signal processing device, and the power supply module is electrically connected to the signal processing device, the display module, and the data storage device respectively;

[0032] The display module is used to display the gas parameter value;

[0033] The power supply module is used to supply power to the signal processing device, the display module, and the data storage device.

[0034] Optionally, the air inlet is a Teflon air inlet.

[0035] According to the specific embodiments provided in the present application, the present application discloses the following technical effects:

[0036] The present application provides an odor detection device, which includes a housing, a calibration air passage, a detection air passage, and a gas detection device. An air inlet is provided on the housing, and the air inlet is connected to the calibration air passage. The calibration air passage is used to filter, adsorb odor, dehumidify, and dry the gas to be measured entering through the air inlet to obtain a first gas. The air inlet is connected to the detection air passage, and is used to filter, dehumidify, and dry the gas to be measured entering through the air inlet after the calibration through the calibration air passage is completed to obtain a second gas. The gas detection device is located inside the housing, and the air inlet end of the gas detection device is respectively connected to the air outlet end of the detection air passage and the air outlet end of the calibration air passage. The gas detection device is used to detect the first gas and generate a first detection signal, and is also used to detect the second gas and generate a second detection signal. The signal processing device is electrically connected to the gas detection device. The signal processing device is used to calibrate the gas detection device according to the first detection signal, and is also used to determine the gas parameter value of the gas to be measured according to the second detection signal. Compared with the prior art, since the odor detection device of the present application first filters, adsorbs odor, dehumidifies, and dries the gas to be measured through the calibration air passage, a first gas free of impurities and odor is obtained, so that the first detection signal generated by the gas detection device is more accurate, and the gas detection device can be calibrated more precisely by the signal processing device according to the first detection signal, so that the determination of gas parameters is not affected by factors such as on-site environmental conditions and sensors; and after the calibration is completed, the second gas is detected through the detection air passage, and then the second gas is detected by the gas detection device after detection, which enables the signal processing device to accurately determine the gas parameter value of the gas to be measured based on the second detection signal of the second gas, avoiding the problem that the concentration of a certain gas in the on-site environment is not proportional to the odor concentration, and greatly improving the detection accuracy of the gas. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a schematic structural diagram of an odor detection device in an embodiment of the present application;

[0039] Figure 2 It is a schematic structural diagram of a switch component and a gas detection device provided by an embodiment of the present application;

[0040] Figure 3 It is a schematic structural diagram of an odor detection device provided by another embodiment of the present application;

[0041] Figure 4 The structural schematic diagram of an odor detection device provided by another embodiment of the present application.

[0042] Explanation of the reference numerals in the drawings:

[0043] Housing - 10, air inlet - 11, calibration air duct - 20, first filtration module - 21, first processing module - 22, first drying module - 23, detection air duct - 30, second filtration module - 31, second processing module - 32, second drying module - 33, gas detection device - 40, gas chamber - 41, sensor - 42, air pump - 43, air outlet - 44, signal processing device - 50, main board - 51, switch assembly - 60, switch shaft - 61, adjusting member - 62, data storage device - 70, display module - 80, liquid crystal screen - 81, power supply module - 90, key board - 91. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0045] To make the above - mentioned objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0046] Please refer to Figure 1 As shown, the above - mentioned odor detection device includes: a housing 10, a calibration air duct 20, a detection air duct 30, a gas detection device 40, and a signal processing device 50. An air inlet 11 is provided on the housing 10. The air inlet 11 is connected to the calibration air duct 20. The calibration air duct 20 is used to filter, adsorb odors, dehumidify, and dry the incoming gas to be measured through the air inlet 11 to obtain a first gas. The air inlet 11 is also connected to the detection air duct 30. The detection air duct 30 is used to filter, dehumidify, and dry the incoming gas to be measured through the air inlet 11 after the calibration through the calibration air duct 20 is completed to obtain a second gas. The gas detection device 40 is located inside the housing 10. The intake end of the gas detection device 40 is respectively connected to the outlet end of the detection air duct 30 and the outlet end of the calibration air duct 20. The gas detection device 40 is used to detect the first gas and generate a first detection signal, and is also used to detect the second gas and generate a second detection signal. The signal processing device 50 is electrically connected to the gas detection device 40. The signal processing device 50 is used to calibrate the gas detection device 40 according to the first detection signal, and is also used to determine the gas parameter value of the gas to be measured according to the second detection signal.

[0047] The above-mentioned calibration air duct 20 and detection channel 30 are both located inside the housing 10. The calibration channel 20 is used to filter, adsorb odors, dehumidify, and dry the gas to be measured, obtaining a first gas, and transporting the first gas to the gas detection device 40. Among them, in the transmission path of the calibration air duct 20 from the air inlet 11 to the gas detection device 40, units corresponding to filtering, odor adsorption, dehumidification, and drying of the gas to be measured can be sequentially arranged. The filtering unit can filter out macromolecular impurities in the gas to be measured. The macromolecular impurities can be, for example, dust, powder, etc. The odor adsorption unit can remove odors from the filtered gas. The dehumidification unit can coarsely remove water molecules from the gas after odor removal. The drying unit can finely dry the gas after coarse removal, obtaining the first gas.

[0048] Among them, the cross-section of the calibration air duct 20 can be circular, square, or triangular. The aperture of the calibration air duct 20 can be custom-set according to actual needs. In this embodiment, the aperture and cross-section of the calibration air duct 20 are not restricted, as long as it can transport the gas to be measured to the gas detection device 40.

[0049] The above-mentioned detection air duct 30 is used to filter, adsorb odors, dehumidify, and dry the gas to be measured after the gas detection device 40 is calibrated, obtaining a second gas, and transporting the second gas to the gas detection device 40. Among them, in the transmission path of the detection air duct 30 from the air inlet 11 to the gas detection device 40, units corresponding to filtering, dehumidification, and drying of the gas to be measured can be sequentially arranged. The filtering unit can filter out macromolecular impurities in the gas to be measured. The macromolecular impurities can be, for example, dust, powder, etc. The dehumidification unit can coarsely remove water molecules from the gas after odor removal. The drying unit can finely dry the gas after coarse removal, obtaining the second gas.

[0050] The air inlet 11 is respectively connected to the calibration air duct 20 and the detection air duct 30. The gas to be measured entering through the air inlet 11 can be transported to the gas detection device 40 through the calibration air duct 20 or the detection air duct 30.

[0051] Among them, at least one sensor can be arranged inside the above gas detection device 40. Different sensors have different functions. The sensor is used to detect the first gas conveyed through the calibration air duct 20 to obtain a first detection signal, and the first detection signal can include the voltage value of the sensor or the odor value of the gas to be detected. The sensor is also used to detect the second gas conveyed through the detection air duct 30 to obtain a second detection signal, and the second detection signal can include the voltage value of the sensor. After obtaining the first detection signal, the gas detection device 40 can send it to the signal processing device 50, and after obtaining the second detection signal, it can also send it to the signal processing device 50.

[0052] The above signal processing device 50 can also be configured with different calibration algorithms. When receiving the first detection signal sent by the gas detection device 40, it can calibrate the sensor inside the gas detection device 40 according to the first detection signal and the preset calibration algorithm.

[0053] Optionally, different filter models can also be configured inside the above signal processing device 50. The filter model can be, for example, a digital band-pass filter, which is used to filter out the interfering voltage value in the second detection signal to obtain the voltage value after removing interference, and obtain the gas parameter value of the gas to be detected according to the voltage value after removing interference and the pre-stored odor mapping relationship.

[0054] The above signal processing device 50 can include two parts: hardware and software. The hardware part amplifies and filters the signal. In this application, through the analysis of the amplification effect of weak signals by designing different filter circuits and analog amplification circuits, the appropriate circuit design scheme is finally determined. The software part analyzes the results by sending the collected second detection signal into different filter models to obtain the gas parameter value. The different filter models can include different filter algorithms.

[0055] It should be noted that the gas parameter value of the above gas to be detected can be the odor concentration value. The odor mapping relationship is used to characterize the mapping relationship between the odor concentration value and the voltage value in different environments. It can be represented in the form of a curve or in the form of a table. The corresponding odor mapping relationships in different environments are different. The odor mapping relationship can be established in advance or established in real time.

[0056] The above housing 10 can be made of cast iron or alloy material, and the present embodiment does not impose any limitation on its material.

[0057] The odor detection device in this embodiment can detect odors in different environmental scenarios. For example, it can include other odor - generating areas such as petrochemical, coal chemical, pharmaceutical chemical, waste treatment, sewage treatment, domestic waste, food processing, and biological breeding. Taking the odor parameter value as the odor concentration value as an example, by collecting the gas to be measured in different environmental scenarios and transporting it through the calibration airway 20 to the gas detection device 40, the odor value of the gas and the pressure value of the corresponding sensor are detected. Then, the mapping relationship between the odor value and the pressure value of the corresponding sensor is established, which can be fitted into the form of a curve or a data table. When it is necessary to detect the odor in a specific scenario, the gas to be measured can be transported through the detection airway 30 to the gas detection device 40 to detect the pressure value of the corresponding sensor, and then the corresponding odor concentration value can be obtained according to the mapping relationship and the pressure value.

[0058] This application provides an odor detection device. The odor detection device includes a housing 10, a calibration airway 20, a detection airway 30, and a gas detection device 40. An air inlet 11 is provided on the housing 10. The air inlet 11 is connected to the calibration airway 20. The calibration airway 20 is used to filter, adsorb odors, dehumidify, and dry the gas to be measured entering through the air inlet 11 to obtain a first gas. The air inlet 11 is connected to the detection airway 30 and is used to filter, dehumidify, and dry the gas to be measured entering through the air inlet 11 after the calibration through the calibration airway 20 is completed to obtain a second gas. The gas detection device 40 is located inside the housing 10. The inlet end of the gas detection device 40 is respectively connected to the outlet end of the detection airway 30 and the outlet end of the calibration airway 20. The gas detection device 40 is used to detect the first gas and generate a first detection signal, and is also used to detect the second gas and generate a second detection signal. The signal processing device 50 is electrically connected to the gas detection device 40. The signal processing device 50 is used to calibrate the gas detection device 40 according to the first detection signal and to determine the gas parameter value of the gas to be measured according to the second detection signal. Compared with the prior art, since the odor detection device of this application first filters, adsorbs odors, dehumidifies, and dries the gas to be measured through the calibration airway 20, thereby obtaining a first gas free of impurities and odors, the first detection signal generated by the gas detection device 40 is more accurate, so that the signal processing device 50 can more accurately calibrate the gas detection device 40 according to the first detection signal, thus eliminating the interference of factors such as on - site environmental conditions and sensors when determining the gas parameters. And after calibration is completed, the second gas is detected through the detection airway 30, and then the second gas is detected by the gas detection device 40 after detection, which enables the signal processing device 50 to accurately determine the gas parameter value of the gas to be measured based on the second detection signal of the second gas, avoiding the problem that the concentration of a certain gas in the on - site environment is not proportional to the odor concentration, and greatly improving the detection accuracy of gas odors.

[0059] In one of the embodiments, please continue to refer to Figure 1 As shown, the following are provided inside the calibration air duct 20: a first filtering module 21, a first processing module 22, and a first drying module 23; the first filtering module 21 is used to filter impurities from the gas to be measured to obtain a first filtered gas; the inlet end of the first processing module 22 is connected to the outlet end of the first filtering module 21, and the first processing module 22 is used to perform odor adsorption and dehumidification processing on the first filtered gas to obtain a first processed gas; the inlet end of the first drying module 23 is connected to the outlet end of the first processing module 22, and the first drying module 23 is used to dry the first processed gas to obtain a first gas.

[0060] It should be noted that the above first filtering module 21 may include a breathable membrane, which may be, for example, a dust-proof breathable membrane. The dust-proof breathable membrane is used to remove dust and powder from the gas to be measured to prevent impurities in the gas to be measured from blocking the air inlet duct, and to transport the filtered first filtered gas to the first processing module 22. The first processing module 22 may include a carbon bead filtering device, which is used to remove water vapor and perform odor adsorption processing on the filtered gas, and to transport the first processed gas after removing water vapor and adsorbing odor to the first drying module 23. The first drying module 23 may be provided with a waterproof breathable membrane, which is used to dry the gas after removing water vapor and adsorbing odor to obtain a first gas.

[0061] It can be understood that the first filtering module 21, the first processing module 22, and the first drying module 23 in the above calibration air duct 20 can be replaced according to actual needs. For example, they can be replaced and maintained according to the usage frequency and environment to extend the service life of the calibration air duct 20 in this application and improve the detection accuracy of the gas concentration.

[0062] In this embodiment, by setting the first filtering module 21 and the first processing module 22 in the calibration air duct 20, environmental interference can be excluded, and by setting the first drying module 23, the moisture in the gas to be measured can be removed in a finer granularity, further improving the detection accuracy of the odor concentration.

[0063] In one of the embodiments, the following are provided inside the detection air duct 30: a second filtering module 31, a second processing module 32, and a second drying module 33. The second filtering module 31 is used to filter impurities from the gas to be measured to obtain a second filtered gas; the inlet end of the second processing module 32 is connected to the outlet end of the second filtering module 31, and the second processing module 32 is used to perform dehumidification processing on the second filtered gas to obtain a second processed gas; the inlet end of the second drying module 33 is connected to the outlet end of the second processing module 32, and the second drying module 33 is used to dry the second processed gas to obtain a second gas.

[0064] The above-mentioned second filtering module 31 is provided with a dust-removing breathable membrane for removing dust and powder from the gas to be measured, so as to prevent impurities in the gas to be measured from blocking the air inlet channel, and conveying the filtered second filtered gas to the second processing module 32. The second processing module 32 is provided with a desiccant for removing water vapor in the filtered gas, and conveying the second processed gas after removing water vapor to the second drying module 33. The second drying module 33 may be provided with a waterproof breathable membrane, and this waterproof breathable membrane is used for drying the second processed gas after removing water vapor to obtain a second gas. This desiccant may be, for example, a silica gel desiccant.

[0065] Among them, after some macromolecular impurities are preliminarily filtered out by the second filtering module 31 from the gas to be measured, then the gas to be measured is sent into the second processing module 32 of the second process, mainly for filtering the gas humidity that affects the measurement result, and then entering the second drying module 33 in the third process for dehumidification and impurity removal to obtain a second gas, and then sending the second gas into the gas detection device 40.

[0066] Specifically, the above-mentioned calibration air duct 20 may include two calibration mechanisms, namely a sensor offset calibration and a three-point comparison bag method artificial calibration mechanism, and these two calibration mechanisms can ensure the accuracy and reliability of the measurement result. As a possible implementation manner, the sensor offset calibration means that the switch assembly 60 controls the calibration air duct 20 to be opened, and this calibration air duct 20 includes a first filtering module 21, a first processing module 22 and a first drying module 23; the first filtering module 21 is used to filter impurities in the gas to be measured to prevent blocking the air inlet and outlet pipes and adsorbing on the sensor to affect the measurement result, and the first processing module 22 is used to filter and adsorb moisture and odor molecules in the intake air to obtain clean air, so that the sensor in the subsequent gas detection device 40 works in relatively clean air, and the initial offset data of the current sensor is adjusted to make the calibration result more accurate.

[0067] The above-mentioned air inlet 11 may be a Teflon air inlet. By setting the air inlet to be made of Teflon material, the effects of being odorless, tasteless and non-toxic can be achieved.

[0068] It can be understood that the second filtering module 31, the second processing module 32 and the second drying module 33 in the above-mentioned detection air duct 30 can be replaced according to actual needs. For example, they can be replaced and maintained according to the usage frequency and environment, so as to extend the service life of the detection air duct 30 in this application and improve the detection accuracy.

[0069] In this embodiment, by setting the second filtering module 31 and the second processing module 32 in the detection airway 30, environmental interference can be eliminated, and by setting the second drying module, the moisture in the gas to be detected can be removed in a finer granularity, thereby further improving the detection accuracy of odor concentration. By setting the air inlet 11 of the detection airway 30 as a Teflon air inlet, by using odorless, tasteless, non-toxic Teflon material, the wear resistance, chemical corrosion resistance, high temperature resistance, and flame retardancy of the air inlet 11 can be increased.

[0070] In one embodiment, the odor detection device further includes: a switch assembly 60, which is arranged between the gas outlet end of the calibration gas channel 20, the gas outlet end of the detection gas channel 30 and the gas detection device 40;

[0071] The switch assembly 60 is used to control the gas to be tested to flow through the calibration gas channel 20 to the gas detection device 40 ; alternatively, the switch assembly 60 is used to control the gas to be tested to flow through the detection gas channel 30 to the gas detection device 40 .

[0072] Specifically, when it is necessary to calibrate the sensor in the gas detection device 40, the switch assembly 60 can control the gas to be tested to be connected to the calibration gas channel 20, so that the gas to be tested flows through the calibration gas channel 20 to the gas detection device 40, thereby realizing the calibration operation. When it is necessary to detect the odor parameter value of the gas to be tested, the switch assembly 60 can control the gas to be tested to be connected to the detection gas channel 30, so that the gas to be tested flows through the detection gas channel 30 to the gas detection device 40, thereby realizing the detection operation.

[0073] Among them, see Figure 2 As shown, the switch assembly 60 includes a switch shaft 61 and an adjusting member 62, the adjusting member 62 is connected to the switch shaft 61, a through hole is provided on the switch shaft 61, and the path of the gas to be tested flowing through the through hole is respectively perpendicular to the line segment where the detection airway 30 is located and the line segment where the calibration airway 20 is located.

[0074] The regulating member 62 is used to control the through hole of the switch shaft 61 to be connected to the calibration gas channel 20 so that the gas to be tested enters the calibration gas channel 20 ; or, to control the through hole of the switch shaft 61 to be connected to the detection gas channel 30 so that the gas to be tested enters the calibration gas channel 20 .

[0075] The adjusting member 62 may be a knob, and the switch shaft 61 may be provided with two through holes with an angle of 90°, so that the two gas paths can be mutually exclusive opened and closed by adjusting the knob.

[0076] Specifically, when it is necessary to calibrate the sensor in the gas detection device 40, by adjusting the knob, the through-hole of the switch shaft 61 is controlled to communicate with the calibration air duct 20, so that the gas to be measured enters the calibration air duct 20 and flows through the calibration air duct 20 to the gas detection device 40, thereby realizing the calibration operation. When it is necessary to detect the odor parameter value of the gas to be measured, by adjusting the knob, the through-hole of the switch shaft 61 is controlled to communicate with the detection air duct 30, so that the gas to be measured enters the detection air duct 30 and flows through the detection air duct 30 to the gas detection device 40, thereby realizing the detection operation.

[0077] In this embodiment, due to the setting of the switch assembly 60, the gas to be measured can be controlled to enter the detection channel or the calibration channel in real time, improving the flexibility of the operation.

[0078] In one of the embodiments, please continue to refer to Figure 1 As shown, the gas detection device 40 includes: a gas chamber 41, a gas sensor 42, a gas pump 43, and an air outlet 44. The gas sensor 42 is located inside the gas chamber 41; the gas chamber 41 is used to accommodate the first gas passing through the calibration air duct 20 or the second gas passing through the detection air duct 30; the gas sensor 42 is used to detect the first gas, generate a first detection signal and send it to the signal processing device 50, and is also used to detect the second gas, generate a second detection signal and send it to the signal processing device 50; the gas pump 43 is used to control the first gas or the second gas to be discharged through the air outlet 44.

[0079] It should be noted that the above gas chamber 41 includes an accommodation space, which is used to accommodate the first gas or the second gas. The gas sensor 42 is, for example, a concentration sensor, which is used to detect the first gas and generate a first detection signal. The first detection signal can be, for example, a pressure value and the odor value of the gas, and is also used to detect the second gas and generate a second detection signal. The second detection signal can include, for example, a pressure value. The gas pump 43 can be a micro vacuum pump.

[0080] Specifically, when the first gas flows through the calibration air duct 20 and then enters the gas chamber 41, it is then detected by the sensor to obtain a first detection signal, and the first gas is sucked out of the gas chamber 41 by the gas pump 43 and discharged through the air outlet 44. And when the second gas flows through the detection air duct 30 and then enters the gas chamber 41, it is then detected by the sensor to obtain a second detection signal, and the second gas is sucked out of the gas chamber 41 by the gas pump 43 and discharged through the air outlet 44.

[0081] In this embodiment, due to the setting of the gas chamber 41, the gas sensor 42, the gas pump 43, and the air outlet 44, the first gas or the second gas in the gas chamber 41 can be detected by the gas sensor 42, and after the detection is completed, the gas can be controlled to be discharged from the air outlet 44 in time by the gas pump 43, which is convenient for realizing the detection of the next gas parameter and improves the convenience of the operation.

[0082] In one embodiment, see Figure 3 As shown, the odor detection device further includes a data storage device 70, and the data storage device 70 is electrically connected to the signal processing device 50; the data storage device 70 is used to store the first detection signal, the second detection signal, and the gas parameter value.

[0083] Among them, the data storage device 70 may internally include a read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory may include a random access memory (RAM) or an external cache memory, etc. By way of illustration and not limitation, the RAM can be in various forms, such as a static random access memory (SRAM) or a dynamic random access memory (DRAM), etc.

[0084] By setting the data storage device to save data in time when the system power is off, it is possible to connect to a computer when obtaining data, and through the type-c interface, special software can be used to read the data, which is convenient for later statistical analysis and archiving. The saved data can also include real-time values, peaks, current application environments, and time, etc.

[0085] Optionally, the odor detection device further includes: a display module 80 and a power supply module 90; the display module 80 is electrically connected to the signal processing device 50, and the power supply module 90 is electrically connected to the signal processing device 50, the display module 80, and the data storage device 70 respectively.

[0086] The display module 80 is used to display the gas parameter value; the power supply module 90 is used to supply power to the signal processing device 50, the display module 80, and the data storage device 70.

[0087] The above display module 80 may include a liquid crystal screen 81, which supports users to set some parameters and select functions of the device through button operations, and is used to display gas parameter values, and can also display the power, operating status, abnormal information, etc. of the abnormal detection device. The above power supply module 90 may include a battery, and the battery may be a rechargeable battery. Users can charge the device through the type-c interface according to the displayed device power indication. When the power is less than a preset threshold, the user is prompted to charge the device.

[0088] Exemplarily, please refer to Figure 4 As shown, taking the display module 80 as the liquid crystal screen 81 and the signal processing device 50 as the main board 51 as an example, the liquid crystal screen 81 can be set on the outer shell of the odor detection device. A keypad 91 is also provided on the above odor detection device. The main board 51, gas chamber 41, sensor 42, air pump 43, outlet 44 filtering device, switch assembly 60, detection airway 30, calibration airway 20, and the power supply module 90 can be a rechargeable battery or a fixed battery.

[0089] When the switch assembly 60 adjusts the detection airway 30, the gas to be measured enters the detection airway 30 from the air inlet 11, and is sequentially filtered, dehumidified, and dried through the second filtering module 31, second processing module 32, and second drying module 33 in the detection airway 30 to obtain a second gas. Then the second gas flows from a to c and enters the gas chamber 41 in the gas detection device 40, is detected by the sensor to obtain a second detection signal, then flows from e to the air pump 43, and flows through f to the outlet 44 to be discharged outside the device. The corresponding flow direction is indicated by the dotted line of x. When the switch assembly 60 adjusts to the calibration airway 20, the gas to be measured enters the calibration airway 20 from the air inlet 11, and is sequentially filtered, deodorized, dehumidified, and dried through the first filtering module 21, first processing module 22, and first drying module 23 in the calibration airway 20 to obtain a first gas. Then the first gas flows from b to c and enters the gas chamber 41 in the gas detection device 40, is detected by the sensor to obtain a first detection signal, then flows from e to the air pump 43, and flows through f to the outlet 44 to be discharged outside the device. The corresponding flow direction is indicated by the dotted line of y.

[0090] The signal of the switch component 60 is transmitted to the main board through d, and the second detection signal is transmitted to the main board through g. The main board controls the air pump 43 to adjust the flow rate through h. When the second gas flows into the air chamber 41, through a special structure, the odor molecules inside are evenly distributed. After processing the voltage value in the second detection signal through filtering - amplification - filtering, the interfering voltage value is removed, and the voltage value after removing interference is obtained. Based on the mapping relationship between the voltage value of a specific scenario stored in advance and the odor concentration value, the odor concentration value corresponding to the voltage value after removing interference is obtained, and this odor concentration value is sent to the liquid crystal screen 81 through i for display on the liquid crystal screen 81.

[0091] Among them, when the user selects the current usage scenario on the odor detection device through the keypad 91, the odor detection starts. The knob can be applied to the calibration gear through the switch component 60. For example, when the initial value of the sensor inside the gas detection device 40 is greater than the preset threshold, on - site initial value setting and calibration can be performed through the buttons. After calibration, the knob is applied to the detection gear through the switch component 60 to allow the gas to be detected to enter the detection airway 30, thereby detecting the odor in the on - site environment. Among them, the above - mentioned preset threshold can be custom - set according to actual needs. The user can also click the button to save the current detection data for subsequent archival analysis.

[0092] Optionally, each module in the detection airway 30 and the calibration airway 20 can predict the service life and replacement time of the sensor in the gas detection device 40 according to the usage frequency, environment, and usage time, and push this information to the liquid crystal screen 81 to prompt the user of the equipment maintenance cycle and remaining service life through the liquid crystal screen 81. For example, the sensor needs to be calibrated and replaced after the equipment has been used for half a year.

[0093] In this embodiment, after calibration is completed, the second gas is detected through the detection airway, and then the detected gas detection device detects the second gas, which enables the signal processing device to accurately determine the gas parameter value of the gas to be detected based on the second detection signal of the second gas, avoiding the problem that the concentration of a certain gas in the on - site environment is not proportional to the odor concentration, and greatly improving the detection accuracy of the gas.

[0094] The technical features of the above - mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above - mentioned embodiments are described. However, as long as the combination of these technical features does not conflict, it should be considered as the scope recorded in this specification.

[0095] In this text, specific examples are used to elaborate on the principles and implementation manners of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application. At the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A peculiar smell detection device, characterized in that: The odor detection device comprises: A housing, wherein an air inlet is provided on the housing; A calibration gas channel, the gas inlet being connected to the calibration gas channel, the calibration gas channel being used to filter, adsorb odor, dehumidify and dry the gas to be tested entering through the gas inlet to obtain a first gas; A detection airway, the air inlet is also connected to the detection airway, and the detection airway is used to filter, dehumidify and dry the gas to be tested entering through the air inlet after calibration through the calibration airway is completed, so as to obtain a second gas; a gas detection device, wherein the gas inlet end of the gas detection device is connected to the gas outlet end of the detection gas channel and the gas outlet end of the calibration gas channel respectively, and the gas detection device is used to detect the first gas and generate a first detection signal, and is used to detect the second gas and generate a second detection signal; A signal processing device, the signal processing device is electrically connected to the gas detection device, the signal processing device is used to calibrate the gas detection device according to the first detection signal, and is used to determine the gas parameter value of the gas to be detected according to the second detection signal.

2. The odor detection device according to claim 1, characterized in that: The calibration airway is internally provided with: A first filtering module, the first filtering module is used to filter impurities from the gas to be tested to obtain a first filtered gas; a first processing module, wherein an air inlet end of the first processing module is connected to an air outlet end of the first filtering module, and the first processing module is used to perform odor adsorption and dehumidification processing on the first filtered gas to obtain a first processed gas; A first drying module, wherein an air inlet end of the first drying module is connected to an air outlet end of the first processing module, and the first drying module is used for drying the first processing gas to obtain the first gas.

3. The odor detection device according to claim 2, characterized in that: The detection airway is internally provided with: A second filtering module, the second filtering module is used to filter impurities from the gas to be tested to obtain a second filtered gas; a second processing module, wherein an air inlet of the second processing module is connected to an air outlet of the second filtering module, and the second processing module is used for dehumidifying the second filtered gas to obtain a second processed gas; A second drying module, wherein the air inlet of the second drying module is connected to the air outlet of the second processing module, and the second drying module is used for drying the second processing gas to obtain the second gas.

4. The odor detection device according to claim 3, characterized in that: The first filter module and the second filter module are both provided with dust removal breathable membranes, the first processing module includes a carbon bead filtering device, the second processing module is provided with a desiccant, and the first drying module and the second drying module are both provided with waterproof breathable membranes.

5. The odor detection device according to claim 1, characterized in that: The odor detection device further comprises: a switch assembly, the switch assembly being arranged between the gas outlet end of the calibration gas channel, the gas outlet end of the detection gas channel and the gas detection device; The switch assembly is used to control the gas to be tested to flow through the calibration gas channel to the gas detection device; or, the switch assembly is used to control the gas to be tested to flow through the detection gas channel to the gas detection device.

6. The odor detection device according to claim 5, characterized in that: The switch assembly comprises a switch shaft and an adjusting member, wherein the adjusting member is connected to the switch shaft, a through hole is arranged on the switch shaft, and a path through which the gas to be tested flows through the through hole is respectively perpendicular to the line segment where the detection gas channel is located and the line segment where the calibration gas channel is located; The regulating member is used to control the through hole of the switch shaft to be connected to the calibration airway so that the gas to be tested enters the calibration airway; or, to control the through hole of the switch shaft to be connected to the detection airway so that the gas to be tested enters the calibration airway.

7. The odor detection device according to claim 1, characterized in that: The gas detection device comprises: an air chamber, a gas sensor, an air pump and an air outlet, wherein the gas sensor is located in the air chamber; The gas chamber is used to contain the first gas passing through the calibration gas channel or the second gas passing through the detection gas channel; The gas sensor is used to detect the first gas, generate a first detection signal and send it to the signal processing device, and is used to detect the second gas, generate a second detection signal and send it to the signal processing device; The air pump is used to control the first gas or the second gas to be discharged through the gas outlet.

8. The odor detection device according to any one of claims 1 to 7, characterized in that: The odor detection device further comprises a data storage device, wherein the data storage device is electrically connected to the signal processing device; The data storage device is used to store the first detection signal, the second detection signal, and the gas parameter value.

9. The odor detection device according to claim 8, characterized in that: The odor detection device further includes: a display module and a power module; the display module is electrically connected to the signal processing device, and the power module is electrically connected to the signal processing device, the display module, and the data storage device respectively; The display module is used to display the gas parameter value; The power module is used to supply power to the signal processing device, the display module, and the data storage device.

10. The odor detection device according to claim 1, characterized in that: The air inlet is a Teflon air inlet.

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