System capable of accurately evaluating gas odor and evaluation method

Abstract

The invention discloses a system capable of accurately evaluating gas odor and an evaluation method, in particular to a system capable of accurately evaluating gas odor, which comprises a detection module, a storage module and an output module, and also comprises an evaluation method capable of accurately evaluating gas odor. Comprising the following steps: designing a stink intensity grading table and a stink intensity threshold range corresponding to the stink intensity grading table, defining a single-component stink intensity calculation formula, carrying out an artificial olfactory identification experiment on a single component and a mixed component, solving corresponding coefficient values of different concentrations of stink gases of the single component and the mixed component, and finally calculating the stink grade by utilizing the formula. Through automatic intelligent design, a set of intelligent smelly bag experimental test equipment is provided, a relation coefficient between the stink intensity and the concentration of the stink gas is calculated, finally the stink intensity of the stink gas can be directly obtained through the coefficient value and the concentration, and a rapid, accurate and objective analysis scheme is provided for stink gas stink degree evaluation.

Description

Technical Field

[0001] The invention relates to the technical field of harmful gas assessment, and in particular to a malodor gas odor assessment system and an evaluation method. Background Art

[0002] Malodorous gases refer to those gases with strong and unpleasant sensory odors, which usually come from industrial emissions, domestic waste, sewage treatment, agricultural activities, etc. Malodorous gases are usually composed of sulfur-containing compounds, nitrogen-containing compounds, halogens and their compounds, hydrocarbons, volatile organic compounds, etc., including hydrogen sulfide, ammonia, methyl mercaptan, styrene, dimethyl sulfide, amines, xylene, formaldehyde, acrolein, etc., which can cause discomfort to people, such as nausea, headache, irritation to the eyes and respiratory tract, etc. Long-term exposure to malodorous gases may have an impact on human health, including respiratory diseases, nervous system damage, etc. The emission of malodorous gases will also reduce air quality, affect plant growth, and destroy the ecological balance. Therefore, accurate evaluation of the odor of malodorous gases is crucial to environmental protection and public health. The evaluation of malodorous gases can help determine the source of pollution, identify the main malodorous substances, and analyze the nature and distribution of malodorous substances;

[0003] The traditional method of evaluating malodorous gases mainly relies on human sense of smell, that is, artificial smelling. This method includes the three-point comparison odor bag method, which is a measurement method based on the national standard "Three-point comparison odor bag method for the determination of air quality odor" (GB / T14675-1993). This method uses human sense of smell to directly reflect the degree of human perception of odor. However, there are some limitations. First, the experience and personal conditions of the odorist are relatively high, and the process is relatively complicated; second, the odorist may be affected by health conditions, environmental factors, etc., resulting in subjectivity and instability of the evaluation results; some malodorous gases are toxic in themselves and will cause harm to the odorist's body; and in the prior art, although some odor monitors can measure the odor intensity, the calculation method of the odor intensity is not unified, resulting in large differences in odor intensity, and the odor intensity obtained by the standard method three-point comparison odor bag method is quite different.

[0004] In view of the above, the present application provides a system and an evaluation method that can accurately evaluate gas odor to solve the above problems. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a system and an evaluation method that can accurately evaluate the odor of gas. Through automated and intelligent design, a set of intelligent sniff bag experiment testing equipment is provided. By continuously recording the relationship between the odor intensity results of manual evaluation and the concentration of odorous gas, the different concentrations of odorous gas can be directly converted through the relationship coefficient value to obtain the corresponding odor intensity, providing a fast, accurate and objective analysis solution for the odor evaluation of odorous gas.

[0006] A system capable of accurately evaluating gas odor comprises a detection module, a storage module and an output module, wherein a control system is arranged on the front side of the detection module, a bag outlet is arranged on the lower front side of the control system, a feedback button is arranged on the front side of the control system, a sliding door is arranged on the rear side of the detection module, a handle is arranged on the sliding door, and a mobile test unit, a power mechanism and an inflation mechanism are arranged in the detection module.

[0007] A method for accurately evaluating gas odor, using a system for accurately evaluating gas odor, comprises the following steps:

[0008] S1: Design a comparison table of odor intensity classification thresholds and the odor intensity threshold range corresponding to each level, and define the odor intensity of a single component as shown in formula (1):

[0009] P=K*logS (1)

[0010] Among them, P is the odor intensity of a single component, S is the concentration of a single component odor gas, and K is the odor intensity coefficient of different single components;

[0011] S2: using the system capable of accurately evaluating gas odor to carry out an olfactory identification experiment of single-component malodorous gas, the storage module will record and store different coefficient values ​​of coefficient K corresponding to different concentrations of different single-component malodorous gases;

[0012] S3: When the concentrations of single-component malodorous gas or mixed-component malodorous gas components are known by formula (1), P is directly obtained for single-component malodorous gas, while the maximum value of P obtained for each component in the mixed component is taken as the overall P value of the mixed component malodorous gas. The P values ​​obtained in the two cases are then compared with the threshold ranges corresponding to each level in the odor intensity grading threshold comparison table to determine the odor intensity of the malodorous gas, and then the corresponding odor level is determined.

[0013] The above technical solution has the following beneficial effects:

[0014] (1) The present invention realizes simultaneous testing by multiple users through automated and intelligent design, with each user testing four test bags each time, thus ensuring the standardization and consistency of the testing process;

[0015] (2) Through the coordinated work of the mobile test unit and the power mechanism, the gas distribution and test sequence of each test unit can be accurately controlled, reducing the error of human operation, greatly shortening the test time, and improving the test efficiency, which is suitable for large-scale and high-frequency testing needs;

[0016] (3) This scheme uses the analysis of the concentration of different components of malodorous gas to comprehensively evaluate its odor intensity through a formula, which can avoid the problem that the evaluation results lack objectivity and accuracy due to the large differences in the perception of the same malodorous gas by human odor detectors;

[0017] (4) It solves the problem of consuming a lot of time and human resources, especially when facing the needs of large-scale or long-term continuous monitoring, and avoids the problem of long-term exposure to certain high-concentration malodorous gas environments, which may cause damage to human health;

[0018] (5) At the same time, it solves the problem that humans cannot smell 24 hours a day, and the olfactory sensitivity is affected by changes in external conditions such as temperature and humidity, and cannot smell the instantaneous intensity of odor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the detection module of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the detection module of the present invention;

[0022] Figure 4 It is a schematic diagram of the local structure of the detection module of the present invention;

[0023] Figure 5 It is a cross-sectional view of the local structure of the detection module of the present invention;

[0024] Figure 6 for Figure 6 A magnified image;

[0025] Figure 7 It is a schematic diagram of the structure of the mobile test unit and the power mechanism of the present invention;

[0026] Figure 8 This is an exploded view of the cooperation between the first connecting rod and the second connecting rod of the present invention;

[0027] Fig. 9 It is a schematic diagram of the partial structure of the power mechanism of the present invention;

[0028] Fig.10 It is a cross-sectional view of the inflation mechanism of the present invention;

[0029] Fig.11 This is a schematic diagram of the structure of the detection air bag of the present invention;

[0030] Fig.12 It is a schematic diagram of the mobile test unit and the power mechanism structure of the present invention in the extended state;

[0031] Fig.13 It is a schematic diagram of the meshing state of the gear mounting plate and the rotating gear of the present invention.

[0032] Among them, 1. detection module; 11. control system; 12. bag outlet; 15. sliding door; 16. handle; 17. feedback button; 2. storage module; 3. output module; 31. slide slot; 32. slider mounting plate; 33. center column; 34. mounting column; 35 gear mounting plate; 36. top column; 37. fixing seat; 38. detection air bag; 39. inflation hole; 391. tightening rubber block; 41. motor; 42. driving gear; 43. fixing rod; 44. rotating gear; 441. first rotating column; 45. rotating plate; 451. guide rod; 452. The second rotating column; 46, the first connecting rod; 461, the first assembly hole; 462, the guide groove; 463, the second assembly hole; 47, the rotating rod; 48, the second connecting rod; 481, the third assembly hole; 482, the fourth assembly hole; 49, the mounting seat; 491, the first rotating shaft; 51, the telescopic cylinder; 52, the gas cylinder mounting plate; 53, the first clean gas bottle; 54, the second clean gas bottle; 55, the third clean gas bottle; 56, the odor bottle; 57, the pressure valve; 58, the inflation needle; 59, the dilution tube; 591, the electronic valve; 61, the first position sensor; 62, the second position sensor. DETAILED DESCRIPTION

[0033] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings of the present application. The structures and contents mentioned in the following embodiments are all based on the drawings of the specification as reference.

[0034] Example 1, a system capable of accurately evaluating gas odor, see Figure 1 , Figure 2 and Figure 3 As shown, it includes a detection module 1, a storage module 2 and an output module 3. A control system 11 is arranged on the front side of the detection module 1, a bag outlet 12 is arranged at the lower front side of the control system 11, a feedback button 17 is arranged on the front side of the control system 11, a sliding door 15 is arranged on the rear side of the detection module 1, and a handle 16 is arranged on the sliding door 15. A mobile test unit, a power mechanism and an inflation mechanism are arranged inside the detection module 1.

[0035] In this embodiment, a system that can accurately evaluate the odor of gas is described, and its main function is to improve the accuracy and efficiency of gas odor evaluation through automated and intelligent design. Specifically, the gas odor evaluation system coordinates the coordinated work of the mobile test unit, the power mechanism and the inflation mechanism in the detection module through the control system 11 to achieve automation and precise control. The tester inputs the sensory evaluation results through the feedback button 17 of the detection module 1, the storage module 2 records and processes these data, and the output module 3 can query the data stored in the storage module 2. After the test is completed, the dilution tube and the electronic valve dilute the odor in the odor bottle to ensure the normal progress of the next test. The entire process is coordinated by the control system 11 to ensure the standardization and consistency of the gas filling and testing process of each test unit, thereby improving the accuracy and efficiency of the test. The sliding door 15 provides access to the interior of the detection module for easy maintenance and operation.

[0036] Example 2, based on Example 1, please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the mobile test unit includes a slide groove 31, a slider mounting plate 32, a center column 33, a mounting column 34 and a gear mounting plate 35. The slide groove 31 is fixedly installed at the bottom of the detection module 1, the slider mounting plate 32 is arranged at the top of the slide groove 31 and is slidably connected to the slide groove 31, a top column 36 is arranged on the left side of the slider mounting plate 32, the center column 33 is fixedly installed on the top of the slider mounting plate 32, the mounting column 34 is fixedly installed on the outside of the center column 33, the gear mounting plate 35 is located at the top of the mounting column 34 and is rotatably connected to the mounting column 34; a plurality of fixing seats 37 are arranged on the gear mounting plate 35, a detection air bag 38 is arranged on the fixing seat 37, an inflation hole 39 is arranged at the center of the detection air bag 38, a compression rubber block 391 is arranged in the inflation hole 39, and a first position sensor 61 is fixedly installed on the top of the gear mounting plate 35.

[0037] In this embodiment, the slide 31 is fixedly mounted at the bottom of the detection module 1, and the slider mounting plate 32 is arranged at the top of the slide 31 and is slidably connected to the slide 31, ensuring that the slider mounting plate 32 can move along the slide 31. A top column 36 is arranged on the left side of the slider mounting plate 32, and the top column 36 is used to push open the push plate 14 to ensure that the detection air bag 38 that has been inflated can be taken out of the detection module 1 for testing by the tester. The central column 33 is fixedly mounted on the top of the slider mounting plate 32, and the mounting column 34 is fixedly mounted on the outside of the central column 33. The gear mounting plate 35 is located at the top of the mounting column 34 and is rotatably connected to the mounting column 34, ensuring that the gear mounting plate 35 can rotate. A plurality of fixed seats 37 are arranged on the gear mounting plate 35, and a detection air bag 38 is arranged on the fixed seat 37. The capacity of the detection air bag 38 is 3L. An inflation hole 39 is arranged at the center of the detection air bag 38, and a tightening rubber block 391 is arranged in the inflation hole 39 to ensure the sealing of the gas and the safe filling of the gas. A first position sensor 61 is fixedly mounted on the top of the gear mounting plate 35 to detect the position of the gear mounting plate 35. Through the coordinated work of these components, the mobile test unit can achieve accurate positioning of the test air bag and accurate filling of gas.

[0038] Example 3, based on Example 1, please refer to Figure 7 , Figure 8 , Fig. 9 , Fig.12 and Fig.13As shown, the power mechanism includes a motor 41, a driving gear 42, a fixed rod 43, a rotating gear 44, a rotating disk 45, a first connecting rod 46, a rotating rod 47 and a second connecting rod 48. The motor 41 is fixedly mounted on one side of the bottom of the detection module 1, the driving gear 42 is drivingly connected to the output shaft of the motor 41, the fixed rod 43 is arranged on the right side of the driving gear 42 and is fixedly connected to the detection module 1, the rotating gear 44 is rotatably connected to the fixed rod 43, the driving gear 42 is meshed with the rotating gear 44, the rotating disk 45 is arranged above the rotating gear 44 and is slidably connected to the fixed rod 43, a guide rod 451 is arranged on the rotating disk 45, a mounting seat 49 is arranged on one side of the guide rod 451, the mounting seat 49 is fixedly mounted on the front side of the inner wall of the detection module 1, and the mounting seat 4 9, a first rotating shaft 491 is fixedly installed on the first connecting rod 46, a first assembly hole 461 is provided at the front end, a guide groove 462 is provided at the center of the first connecting rod 46, a second assembly hole 463 is provided at the rear end of the first connecting rod 46, the first rotating shaft 491 is rotatably connected to the first assembly hole 461, the guide rod 451 is slidably connected to the guide groove 462, a third assembly hole 481 is provided at the front end of the second connecting rod 48, a fourth assembly hole 482 is provided at the rear end of the second connecting rod, the third assembly hole 481 is rotatably connected to the second assembly hole 463 through the rotating rod 47, and the fourth assembly hole 481 is rotatably connected to the center column 33; a first rotating column 441 is fixedly installed on the top of the rotating gear 44, and a second rotating column 452 is fixedly installed on the bottom of the rotating disk 45.

[0039] In this embodiment, the power mechanism drives the driving gear 42 to rotate through the motor 41, and the driving gear 42 is meshed with the rotating gear 44, driving the rotating gear 44 to rotate. The fixed rod 43 provides support for the rotating gear 44 and ensures its stable rotation. The rotating disk 45 is arranged above the rotating gear 44 and is slidably connected to the guide groove 462 of the first connecting rod 46 through the guide rod 451. The first rotating shaft 491 on the mounting seat 49 is rotatably connected to the front end assembly hole 461 of the first connecting rod 46 to ensure that the first connecting rod 46 can rotate around the first rotating shaft 491. The second connecting rod 48 is rotatably connected to the rear end assembly hole 463 of the first connecting rod 46 through the rotating rod 47, and the rear end assembly hole 482 of the second connecting rod 48 is rotatably connected to the central column 33 to form a linkage mechanism, and then through the linkage of the guide rod 451 and the first connecting rod 46, the rotating disk 45 is pushed to slide along the fixed rod 43, and at the same time, through the synergistic effect of the second connecting rod 48 and the rotating rod 47, the position adjustment of the mobile test unit is achieved, and the gas filling and test preparation are completed. It is worth noting that when the motor 41 is started, the driving gear 42 drives the rotating gear 44 to rotate. At this time, the driving gear 42 rotates clockwise, thereby driving the rotating gear 44 to rotate counterclockwise. When the rotating gear 44 rotates counterclockwise, the first rotating column 441 rotates and drives the second rotating column 452 to fit together, so that the rotating disk 45 rotates. When the driving gear 42 is driven to rotate counterclockwise, the rotating gear 44 is driven to rotate clockwise. When the rotating gear 44 rotates clockwise, the first rotating column 441 does not fit with the second rotating column 452, so that only the rotating gear 44 rotates and drives the gear mounting disk 35 to rotate. In this way, the randomness of the position of the detection air bag 38 containing odor is achieved. When the rotating gear 44 drives the gear mounting disk 35 to rotate, a tangential force of the gear is generated. Since the rotation speed of the motor 41 is not high at this time, and the tangential force is applied by the left side of the slide slot 31, the rotating gear 44 does not affect the position of the gear mounting disk 35 when it drives the gear mounting disk 35 to rotate.

[0040] Example 4, based on Example 1, please refer to Figure 4 and Fig.10As shown, the inflation mechanism includes a telescopic cylinder 51, a gas cylinder mounting plate 52, a first clean gas bottle 53, a second clean gas bottle 54, a third clean gas bottle 55 and a odor bottle 56. The telescopic cylinder 51 is fixedly mounted on the top surface inside the detection module 1, and the telescopic end of the telescopic cylinder 51 is fixedly connected to the top of the gas cylinder mounting plate 52. The first clean gas bottle 53, the second clean gas bottle 54, the third clean gas bottle 55 and the odor bottle 56 are all fixedly mounted on the bottom of the gas cylinder mounting plate 52. The first clean gas bottle 53, the second clean gas bottle 54, the third clean gas bottle 55 and the odor bottle 56 are all provided with a pressure valve 57 and an inflation needle 58. The pressure valve 57 is arranged at the lower part of the bottle body, and the inflation needle 58 is arranged at the bottom of the bottle body; a dilution tube 59 is fixedly connected between the third clean gas bottle 55 and the odor bottle 56, and an electronic valve 591 is arranged at one end of the dilution tube 59. A second position sensor 62 is fixedly mounted at the bottom of the gas cylinder mounting plate 52.

[0041] In this embodiment, the telescopic cylinder 51 in the inflation mechanism is fixedly mounted on the top surface inside the detection module 1, and the telescopic end of the telescopic cylinder 51 is fixedly connected to the top of the gas cylinder mounting plate 52 to ensure that the gas cylinder mounting plate 52 can move vertically. The first clean gas bottle 53, the second clean gas bottle 54, the third clean gas bottle 55 and the odor bottle 56 are all fixedly mounted on the bottom of the gas cylinder mounting plate 52, and each gas bottle is provided with a pressure valve 57 and an inflation needle 58. The pressure valve 57 is arranged at the lower part of the bottle body, and the inflation needle 58 is arranged at the bottom of the bottle body. A dilution tube 59 is fixedly connected between the third clean gas bottle 55 and the odor bottle 56, and an electronic valve 591 is arranged at one end of the dilution tube 59 for diluting the odor after each test. A second position sensor 62 is fixedly installed at the bottom of the gas cylinder mounting plate 52 to detect the position of the gas cylinder mounting plate 52; when the detection air bag 38 on the gear mounting plate 35 is aligned with the inflation needle 58, the inflation mechanism fills the gas into the detection air bag 38 through the inflation needle 58 to complete the gas filling and test preparation. After the test is completed, the odor in the odor bottle 56 is diluted through the dilution tube 59 and the electronic valve 591 to ensure the normal conduct of the next test. The entire process is automated and precisely controlled through the coordination of the control system 11 to ensure the standardization and consistency of the gas filling and testing process of each test unit, wherein the motor 41, the first position sensor 61, the second position sensor 62 and the electronic valve 591 are all controlled by the control system 11.

[0042] The working principle of a system capable of accurately evaluating gas odor: The gas odor evaluation system coordinates the coordinated work of the mobile test unit, the power mechanism and the inflation mechanism through the control system 11 to achieve automation and precise control. Specifically, the control system 11 starts the motor 41, and at this time drives the driving gear 42 to rotate clockwise, thereby driving the rotating gear 44 to rotate counterclockwise. When the rotating gear 44 rotates counterclockwise, the first rotating column 441 rotates and drives the second rotating column 452 to fit, so that the rotating disk 45 rotates. Through the linkage of the first connecting rod 46 and the second connecting rod 48, the slider mounting plate 32 is pushed to slide along the slide groove 31. When the driving gear 42 is meshed with the gear mounting disk 35, the control system 11 temporarily turns off the motor 41 to align the detection air bag 38 on the gear mounting disk 35 with the inflation needle 58. When the detection air bag 38 is accurately positioned, the telescopic cylinder 51 drives the gas cylinder mounting plate 52 to descend, so that the inflation needle 58 is inserted into the inflation hole 39 of the detection air bag 38, and the gas from the first clean gas bottle 53, the second clean gas bottle 54, the third clean gas bottle 55 or the odor bottle 56 is filled into the detection air bag 38. After the inflation is completed, the control system 11 restarts the motor 41, and drives the active gear 42 to rotate counterclockwise, thereby driving the rotating gear 44 to rotate clockwise. When the rotating gear 44 rotates clockwise, the first rotating column 441 does not fit with the second rotating column 452, so that only the rotating gear 44 rotates and drives the gear mounting plate 35 to rotate, thereby realizing the randomness of the position of the detection air bag 38 filled with odor, and then by starting the motor 41, the active gear 42 is driven to rotate clockwise, and the rotating gear 44 rotates counterclockwise, and through the linkage mechanism of the second connecting rod 48 and the first connecting rod 46, the push plate 14 is driven to push the detection air bag 38 filled with gas out of the bag outlet 12 for the tester to perform olfactory evaluation. The tester inputs the sensory evaluation results through the feedback button 17. After the test is completed, the dilution tube 59 and the electronic valve 591 dilute the odor in the odor bottle 56 to ensure the normal progress of the next test. The whole process is coordinated by the control system 11 to ensure the standardization and consistency of the gas filling and testing process of each test unit.

[0043] Implementation Example 5, based on Examples 1-4, an experiment was conducted using a system that can accurately evaluate gas odor (hereinafter referred to as the gas odor evaluation system). First, a comparison table of 0 to 5 odor intensity grading thresholds as shown in Table 1 and a range of odor intensity thresholds corresponding to each level as shown in Table 2 were designed:

[0044] Table 1 Odor intensity rating

[0045] Odor intensity level describe Level 0 No odor Level 1 Barely detectable odor (sensory threshold) Level 2 The smell is weak but its nature can be distinguished (recognition threshold) Level 3 Can clearly smell the odor Level 4 Stronger smell Level 5 Very strong smell

[0046] Table 2 Corresponding intensity thresholds for each level of odor intensity

[0047] Odor intensity threshold range P Odor intensity level 0-10 Level 0 10-20 Level 1 20-50 Level 2 50-200 Level 3 200-500 Level 4 ＞500 Level 5

[0048] Then, according to the Chinese standard "three-point comparison odor bag method" (the national testing standard number is HJ1262-2022), the gas odor evaluation system will first fill three of the four (three in the standard, the system design in this case is more standard and consistent) 3L odor-free bags with odor-free air, and the remaining one will be filled with odor-free air and the tested malodorous gas sample at a certain dilution ratio for the odorist to smell at random. When the odorist correctly identifies the odorous bag, it will be diluted and smelled step by step until the odor concentration of the diluted sample is lower than the olfactory threshold of the odorist, that is, when the odorist cannot smell the odor, the experiment is stopped. The odor intensity is set to be a dimensionless quantity with a unit of "1", and the odor sample is odorless and clean air is used to smell the odor sample. The dilution multiple when the sample is continuously diluted until the odorist cannot distinguish the threshold value is taken as the odor gas intensity value P. For example, in the detection method of a malodorous gas with an odor intensity value P of 500, four odorless bags are used, three of which are filled with odorless gas, and the other is filled with odorless air and the test sample at a certain dilution ratio and randomly shuffled, and then provided to multiple odorists for smelling. When the odorist correctly identifies the odorous bag, the sample is diluted step by step until the odor concentration of the diluted sample is lower than the olfactory threshold of the odorist, that is, the odorist cannot smell the gas, and the smelling is stopped. Finally, the average dilution multiple of the diluted sample smelled by multiple odorists is 500, which is taken as the odor intensity value P of the odorous gas, and then the odor intensity of the gas before dilution is 4. The present invention fills a bag containing odor in the national standard with odorless air and a single component in the test sample, i.e., the malodorous gas to be tested, at a certain dilution ratio, and is designed to be filled with different concentrations of the single component gas to conduct multiple experiments to determine the difference in odor intensity values ​​of the single component of different malodorous gases under different gas concentrations.

[0049] Before conducting the test, the odor intensity of a single component is defined as shown in formula (1):

[0050] P=K*logS (1)

[0051] Among them, P is the odor intensity of a single component, S is the concentration of a single component odor gas, and K is the odor intensity coefficient of different single components;

[0052] First, carry out the olfactory identification experiment of single-component malodorous gas, record and store the different coefficient values ​​of coefficient K corresponding to different concentrations of different single-component malodorous gases. For example, the odor intensity value obtained by manually smelling ammonia with a concentration S of 0.15ppm using the gas odor evaluation system is recorded as Substituting into formula (1), the odor coefficient of ammonia at 0.15 ppm can be calculated as The data is stored in the storage module of the gas odor evaluation system and is available for query and data retrieval through the output module. The test results can be used later based on the known ammonia concentration of 0.15 ppm and the recorded and stored The odor intensity value can be directly obtained Then refer to Tables 1 and 2 to determine the corresponding odor level.

[0053] For mixed malodorous gases, the olfactory senses are often absorbed by the components with stronger odor and ignore the components with weaker odor during current human olfactory identification. That is, the malodor intensity of the mixed gas is determined by the component with the highest odor intensity value P. For example, the concentration of ammonia, sulfur dioxide and hydrogen sulfide in the mixed malodorous gas is 0.15ppm, 1.5ppm and 2.5ppm, respectively. The corresponding P values ​​are obtained by using the K values ​​recorded and stored in the single gas experiment. The one with the highest P value is taken as the overall mixed malodorous gas intensity value, and then the malodor level corresponding to the malodorous gas of the mixed components is determined by comparing Table 1 and Table 2.

Claims

1. A system capable of accurately evaluating gas odor, characterized in that: The invention comprises a detection module (1), a storage module (2) and an output module (3); a control system (11) is arranged on the front side of the detection module (1); a bag outlet (12) is arranged below the front side of the control system (11); a feedback button (17) is arranged on the front side of the control system (11); a sliding door (15) is arranged on the rear side of the detection module (1); a handle (16) is arranged on the sliding door (15); and a mobile test unit, a power mechanism and an inflation mechanism are arranged inside the detection module (1).

2. A system capable of accurately evaluating gas odor according to claim 1, characterized in that: The mobile test unit comprises a slide groove (31), a slider mounting plate (32), a center column (33), a mounting column (34) and a gear mounting plate (35); the slide groove (31) is fixedly mounted at the bottom of the detection module (1); the slider mounting plate (32) is arranged at the top of the slide groove (31) and is slidably connected to the slide groove (31); a top column (36) is arranged on the left side of the slider mounting plate (32); the center column (33) is fixedly mounted on the top of the slider mounting plate (32); the mounting column (34) is fixedly mounted on the outer side of the center column (33); and the gear mounting plate (35) is located at the top of the mounting column (34) and is rotatably connected to the mounting column (34).

3. A system capable of accurately evaluating gas odor according to claim 2, characterized in that: The gear mounting plate (35) is provided with a plurality of fixing seats (37), a detection air bag (38) is provided in the fixing seat (37), an inflation hole (39) is provided at the center of the detection air bag (38), and a compression rubber block (391) is provided in the inflation hole (39).

4. A system capable of accurately evaluating gas odor according to claim 1, characterized in that: The power mechanism comprises a motor (41), a driving gear (42), a fixed rod (43), a rotating gear (44), a rotating disk (45), a first connecting rod (46), a rotating rod (47) and a second connecting rod (48); the motor (41) is fixedly mounted on one side of the bottom of the detection module (1); the driving gear (42) is drivingly connected to the output shaft of the motor (41); the fixed rod (43) is arranged on the right side of the driving gear (42) and is fixedly connected to the detection module (1); the rotating gear (44) is rotationally connected to the fixed rod (43); the driving gear (42) and the rotating gear (44) are meshed; the rotating disk (45) is arranged above the rotating gear (44) and is slidably connected to the fixed rod (43); a guide rod (451) is arranged on the rotating disk (45); and a mounting seat (49) is arranged on one side of the guide rod (451). The mounting seat (49) is fixedly mounted on the front side of the inner wall of the detection module (1); a first rotating shaft (491) is fixedly mounted on the mounting seat (49); a first assembly hole (461) is arranged at the front end of the first connecting rod (46); a guide groove (462) is arranged at the center of the first connecting rod (46); a second assembly hole (463) is arranged at the rear end of the first connecting rod (46); the first rotating shaft (491) is rotatably connected to the first assembly hole (461); the guide rod (451) is slidably connected to the guide groove (462); a third assembly hole (481) is arranged at the front end of the second connecting rod (48); a fourth assembly hole (482) is arranged at the rear end of the second connecting rod; the third assembly hole (481) is rotatably connected to the second assembly hole (463) through a rotating rod (47); and the fourth assembly hole (481) is rotatably connected to the center column (33).

5. A system capable of accurately evaluating gas odor according to claim 4, characterized in that: A first rotating column (441) is fixedly mounted on the top of the rotating gear (44), and a second rotating column (452) is fixedly mounted on the bottom of the rotating disk (45).

6. A system capable of accurately evaluating gas odor according to claim 1, characterized in that: The inflation mechanism comprises a telescopic cylinder (51), a gas cylinder mounting plate (52), a first clean gas bottle (53), a second clean gas bottle (54), a third clean gas bottle (55) and an odor bottle (56); the telescopic cylinder (51) is fixedly mounted on the top end surface inside the detection module (1); the telescopic end of the telescopic cylinder (51) is fixedly connected to the top of the gas cylinder mounting plate (52); the first clean gas bottle (53), the second clean gas bottle (54), the third clean gas bottle (55) and the odor bottle (56) are all fixedly mounted on the bottom of the gas cylinder mounting plate (52); the first clean gas bottle (53), the second clean gas bottle (54), the third clean gas bottle (55) and the odor bottle (56) are all provided with a pressure valve (57) and an inflation needle (58); the pressure valve (57) is arranged at the lower part of the bottle body, and the inflation needle (58) is arranged at the bottom of the bottle body.

7. A system capable of accurately evaluating gas odor according to claim 6, characterized in that: A dilution tube (59) is fixedly connected between the third clean gas bottle (55) and the odor gas bottle (56), and an electronic valve (591) is provided at one end of the dilution tube (59).

8. A system capable of accurately evaluating gas odor according to claim 6, characterized in that: A first position sensor (61) is fixedly mounted on the top of the gear mounting plate (35), and a second position sensor (62) is fixedly mounted on the bottom of the gas cylinder mounting plate (52).

9. A method for accurately evaluating gas odor, using a system for accurately evaluating gas odor as described in claims 1 to 8, characterized in that: The steps include: S1: Design a comparison table of odor intensity classification thresholds and the odor intensity threshold range corresponding to each level, and define the odor intensity of a single component gas as shown in formula (1): P=K*logS (1) Among them, P is the odor intensity of a single component gas, S is the concentration of a single component odor gas, and K is the odor intensity coefficient of different single components; S2: using the system capable of accurately evaluating gas odor to carry out an olfactory experiment of a single-component malodorous gas, the storage module records and stores different coefficient values ​​of coefficient K corresponding to different concentrations of different single-component malodorous gases; S3: When the concentrations of single-component malodorous gas or mixed-component malodorous gas components are known by formula (1), P is directly calculated for single-component malodorous gas, while the maximum value of P calculated for each component in the mixed component is taken as the overall P value of the mixed component malodorous gas. The P values ​​calculated in the two cases are then compared with the threshold ranges corresponding to each level in the odor intensity grading threshold comparison table to determine the odor intensity of the malodorous gas.

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