Organic matter moisture desorption and adsorption characteristic measuring device and automatic calibration method thereof

Abstract

The application provides an organic matter desorption and adsorption characteristic measuring device and an automatic calibration method thereof, and belongs to the technical field of measurement. The organic matter desorption and adsorption characteristic measuring device has a simulation calibration device. The simulation calibration device has an environment cabin. The environment cabin is additionally provided with a control unit, a temperature adjusting unit, a temperature sensor, a humidity adjusting unit, a humidity sensor, an air pressure adjusting unit, an air pressure sensor, a communication unit, a sample bearing unit and a weighing unit. The sample bearing unit is composed of a stator and a rotor. The stator is a concave disc with a notch. The rotor is a toothed gear wheel. The use method of the device mainly includes the following steps: a parameter setting stage, a pre-balancing stage, a tare weight removing stage, a reference weighing stage, a measuring stage, a dynamic balancing stage, a cycle desorption stage, a cycle adsorption stage and a calibration stage. The problems that the current organic matter desorption and adsorption method is complicated to operate and has a large error can be solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of measurement, and in particular, relates to a kind of organic matter desorption and moisture absorption characteristics measuring equipment and automatic calibration method thereof. BACKGROUND

[0002] The moisture content of organic matter (tobacco, paper, wood, food, etc.) is a quality characteristic index closely related to its quality characteristics (suitable processing, water removal (addition) efficiency, fermentation period, moderate fermentation, safe storage, taste retention, nutrient loss, etc.), which is greatly influenced by atmospheric environmental conditions, geographical conditions (air pressure, temperature, humidity). The desorption and moisture absorption characteristics have been an important research direction highly concerned by tobacco industry, paper industry, printing and packaging industry, wood furniture industry, food industry and related warehousing industry and logistics industry.

[0003] The equilibrium moisture content of organic matter is the result of heat and mass transfer with the environment atmosphere. In the past, the determination of the equilibrium moisture content of organic matter was generally obtained by manual experimental means under standard atmospheric conditions (such as 1 standard atmosphere, 22℃, 60% RH in tobacco industry), and the influence of geographical conditions (altitude) was not considered, and the hygroscopic equilibrium moisture content and the desorption equilibrium moisture content were not distinguished. Therefore, the test data obtained are not systematic, and there is a lack of systematic study of the hygroscopic and desorption quality characteristics in the conversion process of environmental atmosphere and geographical conditions, and there is a significant deficiency in the guidance of mold prevention, damage prevention, quality improvement and efficiency enhancement in the storage, processing and transportation processes.

[0004] In terms of specific methods, the determination method of the desorption and moisture absorption characteristics of organic matter (tobacco, paper, wood, food, etc.) is mostly carried out by manual weighing and computer-aided calculation, which is relatively cumbersome to operate, is easily disturbed by external interference and has large errors, and has the problems of cumbersome operation and large errors. SUMMARY

[0005] Therefore, the present application provides a kind of organic matter desorption and moisture absorption characteristics measuring equipment and automatic calibration method thereof, which can solve the problems of cumbersome operation and large errors of the existing desorption and moisture absorption characteristics determination method.

[0006] The present application is realized as follows:

[0007] The first aspect of the present application provides a kind of organic matter desorption and moisture absorption characteristics measuring equipment, with simulation calibration device, the simulation calibration device has environment cabin, the environment cabin is also provided with control unit, temperature regulating unit, temperature sensor, humidity regulating unit, humidity sensor, air pressure regulating unit, air pressure sensor, communication unit, sample bearing unit, weighing unit, wherein,

[0008] The temperature adjusting unit is used for adjusting the temperature inside the environment cabin.

[0009] The temperature adjusting unit is used for adjusting the temperature inside the environment cabin.

[0010] The temperature sensor is used for monitoring the temperature inside the environment cabin in real time.

[0011] The humidity adjusting unit is used for adjusting the humidity inside the environment cabin.

[0012] The humidity sensor is used for monitoring the humidity inside the environment cabin in real time.

[0013] The air pressure adjusting unit is used for adjusting the air pressure inside the environment cabin.

[0014] The air pressure sensor is used for monitoring the air pressure inside the environment cabin in real time.

[0015] The communication unit is used for feeding back the measurement information to the control unit.

[0016] The sample bearing unit is used for rotating the sample.

[0017] The weighing unit is used for weighing the sample.

[0018] The technical effect of the organic matter desorption and adsorption characteristic measurement equipment provided by the application is as follows: by adopting the simulation calibration device, the desorption and adsorption characteristic measurement of the organic matter becomes full-automatic measurement, the cumbersome operation steps are reduced, and the error caused by external environment interference is reduced and the precision is high by timely and accurate adjustment of the environment condition through the control unit and the communication unit.

[0019] On the basis of the above technical solution, the organic matter desorption and adsorption characteristic measurement equipment can be further improved as follows:

[0020] The sample bearing unit is combined by a stator and a rotor, the stator is a concave disc with a notch, the rotor is a tooth-shaped gear wheel, the rotor includes a gear and a gear tooth, the rotor is coaxially installed in the groove of the stator, and the gear teeth are used for placing the sample box.

[0021] The fixed cabin and the mobile cabin are controlled through a mobile cabin control mechanism, the mobile cabin control mechanism drives the mobile cabin to make vertical movement in the fixed cabin, and a film bag for sealing is arranged between the mobile cabin and the mobile cabin control mechanism.

[0022] The environment cabin comprises a fixed cabin and a mobile cabin, and sealing doors are arranged on the fixed cabin and the mobile cabin.

[0023] Further, the inner wall of the mobile cabin is consistent in size with the outer wall of the fixed cabin and is nested together, and the internal volume of the environment cabin is changed to realize the adjustment of the cabin pressure under the sealing condition along with the adjustment of the mobile cabin adjusting structure.

[0024] Further, a weighing disc is arranged on the weighing unit, and the weighing disc is used for weighing the sample weight.

[0025] Further, the weighing unit is installed at the notch of the stator, and the weighing disc is flush with the inner concave surface of the stator and does not contact the inner concave surface of the stator.

[0026] The second aspect of the present application provides an automatic calibration method of an organic matter desorption and adsorption characteristic measuring device, which adopts the organic matter desorption and adsorption characteristic measuring device described above, and comprises the following steps:

[0027] S1: parameter setting stage: open the sealing door of the environment cabin, put the empty sample box between the teeth of the rotor, set the initial value and gradient series value of atmospheric pressure, the initial value and gradient series value of temperature, the initial value and gradient series value of humidity, the rotor rotation period, the rotation interval period, the pre-equilibrium period and the dynamic equilibrium period on the control unit;

[0028] S2: pre-equilibrium stage: close the sealing door, start the simulation calibration device, the temperature adjusting unit, the humidity adjusting unit and the air pressure adjusting unit start to work, and the measurement information is fed back to the control unit through the communication unit to drive the temperature adjusting unit, the humidity adjusting unit and the air pressure adjusting unit, until the atmospheric environment in the environment cabin meets the set level, and then the pre-equilibrium period is balanced;

[0029] S3: tare stage: the rotor rotates in a step-by-step manner for one revolution, each sample box is pushed into the weighing unit for weighing, and the weighing information is transmitted to the control unit through the communication unit, the tare of each sample box is removed through the control unit, and each sample box is marked as zero weight;

[0030] S4: Baseline Weighing Stage: Open the sealed door of the environmental chamber, quickly place the oven-dry organic matter into each sample box, leaving one sample box empty for system calibration; quickly close the sealed door, and the rotor rotates once more in a stepwise manner to weigh and record the original weight of each sample.

[0031] S5: Measurement stage: After the baseline weighing is completed, the rotor cyclically weighs the weight of each sample box according to the set rotation interval and transmits the weight to the control unit through the communication unit until the weight of the sample in the sample box no longer increases due to moisture absorption. The control unit determines that the sample has entered dynamic equilibrium and records the time and weight at which it reaches equilibrium.

[0032] S6: Dynamic equilibrium stage: When all the sample boxes have reached dynamic equilibrium, maintain the measurement state of the samples until the set dynamic equilibrium period, and complete the initial gradient moisture absorption test.

[0033] S7: Cyclic moisture absorption stage: The control unit automatically increases the set value of air pressure, temperature or humidity according to the set gradient, and directs the ambient atmospheric device to perform the cyclic automatic moisture absorption test of steps S5-S6 in order from low to high, until the moisture absorption test of the gradient high limit is completed.

[0034] S8: Cyclic Dehumidification Stage: After the gradient high limit moisture absorption test is completed, the cyclic automatic dehumidification test of step S7 is performed in descending order until the dehumidification test is completed when the gradient returns to the initial set value.

[0035] S9: Calibration Phase: The control unit calculates and outputs the moisture content C under each equilibrium state. n,湿基 Or C n,干基 Equilibrium time H (hygroscopic equilibrium) or dehumidification time h, and the "moisture content-time" line graph, C n,湿基 Or C n,干基 The calibration formula is:

[0036]

[0037]

[0038] In the formula, C 干基,i,j The dry basis moisture content refers to the proportion of water mass to the absolute dry mass of a wet material, where the dry mass equals the mass of the material minus the mass of the water mass. C 湿基,i,j The moisture content of the wet basis refers to the proportion of water mass to material mass in the wet material, in %; M refers to weight, in g; "0" represents absolute dryness; i refers to the sample box number, which is a natural number from 1 to n; j represents a point on the time series, which is a natural number from 1 to n.

[0039] Based on the above technical solution, the automatic calibration method of the organic matter desiccation and hygroscopic properties measuring device of the present invention can be further improved as follows:

[0040] Furthermore, the parameters of S1 are specifically set as follows: the rotor rotation period is the number of samples × 6s, the rotation interval period is a multiple of the rotation period and ≤10min, the pre-balancing period is 30~35min, and the dynamic balancing period is 8~8.5h.

[0041] Furthermore, the pre-balancing period is preferably 30 minutes, and the dynamic balancing period is preferably 8 hours.

[0042] Compared with the prior art, the beneficial effects of the organic matter desiccation and hygroscopic properties measuring device and its automatic calibration method provided by the present invention are as follows: by adopting a simulation calibration device, the specific measurement of organic matter desiccation and hygroscopic properties becomes a fully automatic measurement, reducing cumbersome operation steps. At the same time, the control unit and communication unit can adjust the environmental conditions in a timely and accurate manner, thereby reducing the error caused by external environmental interference and achieving high accuracy. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a structural diagram of a device for measuring the moisture desiccation and hygroscopic properties of organic matter;

[0045] Figure 2 A schematic diagram of a sample carrier unit for a device for measuring the desiccation and hygroscopic properties of organic matter;

[0046] Figure 3 A flowchart of an automatic calibration method for an organic matter desiccation and hygroscopic properties measuring device;

[0047] Figure 4 This is an electrical connection diagram for a device used to measure the moisture desiccation and hygroscopic properties of organic matter.

[0048] Figure 5 A line graph showing moisture content versus time;

[0049] The attached diagram lists the components represented by each number as follows:

[0050] 1, control unit; 10, sample box; 11, fixed cabin; 12, moving cabin; 13, moving cabin control mechanism; 14, environment cabin; 2, temperature adjustment unit; 21, temperature sensor; 3, humidity adjustment unit; 31, humidity sensor; 4, air pressure adjustment unit; 41, air pressure sensor; 5, communication unit; 6, sample bearing unit; 61, stator; 62, rotor; 621, gear; 622, ratchet; 7, weighing unit; 71, weighing pan; 8, film capsule. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0052] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0053] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0055] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0056] As Figures 1-2 and 4, is the first embodiment of the organic matter desorption and hygroscopicity measuring device provided by the first aspect of the present application. In this embodiment, a simulation calibration device is provided, which has an environment cabin 14, and the environment cabin 14 is also provided with a control unit 1, a temperature adjusting unit 2, a temperature sensor 21, a humidity adjusting unit 3, a humidity sensor 31, a gas pressure adjusting unit 4, a gas pressure sensor 41, a communication unit 5, a sample bearing unit 6, and a weighing unit 7. Among them,

[0057] The control unit 1 is used for inputting and setting parameters and driving the temperature adjusting unit 2, the temperature sensor 21, the humidity adjusting unit 3, the humidity sensor 31, the gas pressure adjusting unit 4, and the gas pressure sensor 41.

[0058] The temperature adjusting unit 2 is used for adjusting the temperature inside the environment cabin 14.

[0059] The temperature sensor 21 is used for monitoring the temperature inside the environment cabin 14 in real time.

[0060] The humidity adjusting unit 3 is used for adjusting the humidity inside the environment cabin 14.

[0061] The humidity sensor 31 is used for monitoring the humidity inside the environment cabin 14 in real time.

[0062] The gas pressure adjusting unit 4 is used for adjusting the gas pressure inside the environment cabin 14.

[0063] The gas pressure sensor 41 is used for monitoring the gas pressure inside the environment cabin 14 in real time.

[0064] The communication unit 5 is used for feeding back the measurement information to the control unit 1.

[0065] The sample bearing unit 6 is used for rotating the sample.

[0066] The weighing unit 7 is used for weighing the weight of the sample. The control unit 1 is electrically connected with the communication unit 5, the temperature adjusting unit 2, the humidity adjusting unit 3, the gas pressure adjusting unit 4, the sample bearing unit 6, the weighing unit 7, the moving cabin control mechanism 13, the temperature sensor 21, the humidity sensor 31, and the gas pressure sensor 41.

[0067] In use, first, parameters are input in the control unit 1, so that the inside of the environment cabin 14 is balanced, the absolute dry organic matter is put into the sample box 10, the sample carrying unit 6 drives the sample box 10 to step, then the sample box 10 is driven to the weighing unit 7 to be weighed, and the weighing data is output through the communication unit 5. Wherein, the temperature sensor 21 can be selected from the temperature sensor with model LM35DZ LM35 produced by Shenzhen Weilide Technology Co., Ltd., the humidity sensor 31 can be selected from the humidity sensor with model LIS2DETR produced by Shenzhen Xingchuangyang Technology Co., Ltd., and the air pressure sensor 41 can be selected from the air pressure sensor with model 209-008G produced by Shenzhen Huashengda Microelectronics Co., Ltd.

[0068] In the above technical solution, the sample carrying unit 6 is combined by a stator 61 and a rotor 62, the stator 61 is a concave disc with a notch, the rotor 62 is a toothed wheel, the rotor 62 includes a gear 621 and a gear tooth 622, the rotor 62 is coaxially installed in the groove of the stator 61, and the gear tooth 622 is used for placing the sample box 10.

[0069] In the above technical solution, the number of the gear tooth 622 is a multiple of 3 plus 1, such as 4, 7, 10, etc.

[0070] In the above technical solution, the fixed cabin 11 and the moving cabin 12 are controlled through the moving cabin control mechanism 13, the moving cabin control mechanism 13 drives the moving cabin 12 to do vertical motion in the fixed cabin 11, and the thin film capsule 8 for sealing is arranged between the moving cabin 12 and the moving cabin control mechanism 13.

[0071] In the above technical solution, the environment cabin 14 includes the fixed cabin 11 and the moving cabin 12, and the fixed cabin 11 and the moving cabin 12 are both provided with a sealing door.

[0072] Further, in the above technical solution, the outer wall of the fixed cabin 11 and the inner wall of the moving cabin 12 are consistent in size and are nested together, and the internal volume of the environment cabin 14 is changed along with the adjustment of the adjusting structure of the moving cabin 12.

[0073] Further, in the above technical solution, the weighing unit 7 is provided with a weighing disc 71, and the weighing disc 71 is used for weighing the sample.

[0074] Further, in the above technical solution, the weighing unit 7 is installed at the notch of the stator 61, and the weighing disc 71 is flush with the inner concave surface of the stator 61 and does not contact the inner concave surface of the stator 61.

[0075] As shown in Figure 3 Fig. 2 is a first embodiment of an automatic calibration method of the organic matter desorption and adsorption characteristic measuring device provided by the second aspect of the present application, in the embodiment, the above-mentioned organic matter desorption and adsorption characteristic measuring device is adopted, and the method includes the following steps:

[0076] S1: Parameter setting stage: open the sealed door of the environment cabin 14, put empty sample boxes between the tines 622 of the rotor 62, set the initial value and gradient series value of atmospheric pressure, the initial value and gradient series value of temperature, the initial value and gradient series value of humidity, the rotor rotation period, and the rotation interval period, the pre-equilibrium period, the dynamic equilibrium period on the control unit 1;

[0077] S2: Pre-equilibrium stage: close the sealed door, start the simulation calibration device, and the temperature adjusting unit 2, the humidity adjusting unit 3, and the air pressure adjusting unit 4 start to work, and the measurement information is fed back to the control unit 1 through the communication unit 5 for driving the temperature adjusting unit 2, the humidity adjusting unit 3, and the air pressure adjusting unit 4 until the atmospheric environment in the environment cabin 14 meets the set level, and then the pre-equilibrium period is balanced;

[0078] S3: Tare stage: the rotor 62 rotates one round in a step-by-step manner, and each sample box is sequentially pushed into the weighing unit 7 for weighing and is transmitted to the control unit 1 by the communication unit 5; each sample box is tared by the control unit 1, and each sample box is marked as zero weight;

[0079] S4: Reference weighing stage: open the sealed door of the environment cabin 14, quickly put the absolutely dry organic matter into each sample box, and reserve one sample box 10 as empty for system calibration; quickly close the sealed door, and the rotor 62 rotates one round in a step-by-step manner again to weigh and record the original weight of each sample;

[0080] S5: Measurement stage: after the reference weighing, the rotor 62 weighs the weight of each sample box 10 in a cycle according to the set rotation interval period and transmits it to the control unit 1 through the communication unit 5 until the weight of the sample in the sample box 10 no longer increases due to moisture absorption, and the control unit 1 determines that the sample enters dynamic equilibrium and records the time when the sample reaches equilibrium and the equilibrium weight;

[0081] S6: Dynamic equilibrium stage: when all the sample boxes 10 reach dynamic equilibrium, the measurement state of the sample is maintained for a set dynamic equilibrium period to complete the initial gradient moisture absorption test;

[0082] S7: Cycle moisture absorption stage: the control unit 1 automatically increases the set value of air pressure or temperature or humidity according to the set gradient, and commands the environment atmospheric device to perform the cycle automatic moisture absorption test of S5-S6 in order from low to high until the moisture absorption test at the high limit value of the gradient is completed;

[0083] S8: Cycle moisture release stage: after the moisture absorption test at the high limit value of the gradient is completed, the cycle automatic moisture release test of S7 is performed in order from high to low until the moisture release test at the initial set value of the gradient is completed;

[0084] S9: calibration stage: the control unit 1 calculates and outputs the moisture content C in each equilibrium state n,湿基 or C n,干基 , the equilibrium time H, the hygroscopic equilibrium or the dehumidification equilibrium, and the "moisture content-time" broken line graph, C n,湿基 or C n,干基 The calibration formula is:

[0085]

[0086]

[0087] In the formula, C 干基,i,j is the moisture content of the dry basis, which refers to the proportion of the water mass in the absolute dry material mass, wherein the dry material mass is equal to the material mass minus the water mass, C 湿基,i,j is the moisture content of the wet basis, which refers to the proportion of the water mass in the material mass, with a unit of %; M refers to the weight, with a unit of g; "0" represents absolute dryness; i refers to the sample box number, which is a natural number of 1, 2, 3,..., n; j represents a point in the time sequence, which is a natural number of 1, 2, 3,..., n.

[0088] In the formula, the absolute dry organic matter is organic matter with a moisture content of 0%; the organic matter includes one of tobacco, paper, wood, and grain.

[0089] Further, in the above technical solution, the parameters of S1 are specifically set as follows: the rotor rotation period is sample number x 6 s, the rotation interval period is a multiple of the rotation period and is ≤10 min, the pre-equilibrium period is 30-35 min, and the dynamic equilibrium period is 8-8.5 h.

[0090] Further, in the above technical solution, the pre-equilibrium period is preferably 30 min, and the dynamic equilibrium period is preferably 8 h.

[0091] Example 1:

[0092] S1, parameter setting: open the environmental chamber sealing door, place 10 empty sample boxes 10 between the gear teeth 622 of the rotor 62 of the sample carrying unit 6, set the atmospheric pressure initial value to 101325 Pa without a gradient value, the temperature initial value to 25°C without a gradient value, the humidity initial value to 50% RH, the gradient value to 60%, the rotor rotation period to 1 min (10 sample boxes x 6 s = 60 s), the interval period of the rotor rotation to 10 min (10 times of 1 min), the pre-equilibrium period to 30 min, and the dynamic equilibrium period to 8 hours.

[0093] S2, pre-equilibrium: close the sealing door, start the simulation calibration device, the temperature sensor 21, the humidity sensor 31 and the air pressure sensor 41 start to work and feed the measurement information to the control unit 1 through the communication unit 5 for driving the temperature adjusting unit 2, the humidity adjusting unit 3 and the air pressure adjusting unit 4 until the atmospheric environment in the environmental cabin meets the set level, and then the device automatically pre-equilibrates for 30 minutes;

[0094] S3, skinning stage: the rotor 62 rotates one round in a step-by-step manner, the 10 sample boxes 10 are pushed into the weighing unit 7 for weighing in turn, and the box weight Mbox is transmitted to the control unit 1 by the communication unit 5; the sample boxes 10 are weighed one by one by the control unit 1, and the weight of each sample box 10 is marked as 0.00g;

[0095] S4, reference weighing stage: open the sealing door of the environmental cabin, put the absolutely dry tobacco shreds, expanded tobacco shreds and tobacco stem shreds into 3 parallel sample boxes 10 (3x3=9 in total) respectively, and leave the remaining 1 sample box 10 empty; quickly close the sealing door, and the rotor rotates one round in a step-by-step manner again to weigh and record the original weight M0 of each sample.

[0096] S5, measurement stage: after the reference weighing, the rotor 62 weighs the weight of each sample box 10 in a cycle according to the set rotation interval and transmits it to the control unit 1 through the communication unit 5 until the weight of the sample in the sample box 10 no longer increases due to moisture absorption, and the control unit 1 determines that the sample enters dynamic equilibrium and records the time Hequilibrium and the equilibrium weight Mequilibrium when it reaches equilibrium.

[0097] S6, dynamic equilibrium stage: when all the sample boxes 10 reach dynamic equilibrium, the measurement state of the sample is maintained for a set dynamic equilibrium period to complete the initial gradient moisture absorption test.

[0098] S7, cycle moisture absorption stage: the control unit 1 automatically increases the humidity to the set 60% RH, and instructs the environmental atmospheric device to perform the cycle automatic moisture absorption test of S5-S6 in the order from low to high until the gradient high limit value moisture absorption test is completed.

[0099] S8, cycle moisture release stage: after the gradient high limit 60% RH moisture absorption test is completed, the gradient initial set value 50% RH moisture release test is completed.

[0100] S9, calibration stage: the control unit 1 calculates and outputs the moisture content C n,湿基 or C n,干基 , the equilibrium time Hmoisture equilibrium or hmoisture release and the "moisture content-time" fold line graph through the communication unit 5.

[0101] The results are as follows, the hygroscopic equilibrium and the dehumidification equilibrium structure are shown in Table 1, and the "moisture content-time" broken line graph is shown in Figure 5

[0102] Table 1

[0103]

[0104] Conclusion:

[0105] In combination with Table 1, in this test, the equilibrium moisture content and the time to reach the equilibrium of three parallel samples of three tobacco materials in two kinds of atmospheric conditions are collected at one time, and the weight of the empty box is always 0 during the measurement, so that the zero drift of the weighing unit does not exist, and it can be determined that the measurement does not have systematic errors.

[0106] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​

Claims

1. An organic matter desorption and adsorption characteristic measuring device with a simulation calibration device, the simulation calibration device having an environment cabin, the environment cabin further provided with a control unit, a temperature adjusting unit, a temperature sensor, a humidity adjusting unit, a humidity sensor, an air pressure adjusting unit, an air pressure sensor, a communication unit, a sample bearing unit, a weighing unit, characterized in that the control unit is used for inputting and setting parameters and driving the temperature adjusting unit, the temperature sensor, the humidity adjusting unit, the humidity sensor, the air pressure adjusting unit, and the air pressure sensor; the temperature adjusting unit is used for adjusting the temperature inside the environment cabin; the temperature sensor is used for monitoring the temperature inside the environment cabin in real time; the humidity adjusting unit is used for adjusting the humidity inside the environment cabin; the humidity sensor is used for monitoring the humidity inside the environment cabin in real time; the air pressure adjusting unit is used for adjusting the air pressure inside the environment cabin; the air pressure sensor is used for monitoring the air pressure inside the environment cabin in real time; the communication unit is used for feeding back measurement information to the control unit; the sample bearing unit is used for rotating a sample; the environment cabin is further provided with a fixed cabin and a moving cabin, the fixed cabin and the moving cabin are both provided with a sealing door; the fixed cabin and the moving cabin are controlled through a moving cabin control mechanism, the moving cabin control mechanism drives the moving cabin to make vertical movement in the fixed cabin, a film capsule for sealing is arranged between the moving cabin and the moving cabin control mechanism; the weighing unit is used for weighing the weight of the sample; the control unit is electrically connected with the communication unit, the temperature adjusting unit, the humidity adjusting unit, the air pressure adjusting unit, the sample bearing unit, the weighing unit, the moving cabin control mechanism, the temperature sensor, the humidity sensor, and the air pressure sensor. The sample bearing unit is combined by a stator and a rotor, the stator is a notched concave disc, the rotor is a tooth-shaped handle, the rotor includes a gear and a handle tooth, the rotor is coaxially installed in the groove of the stator, and the handle teeth are used for placing sample boxes. The outer wall of the fixed cabin and the inner wall of the moving cabin are consistent in size and are nested together, and the internal volume of the environment cabin is changed to realize the adjustment of the cabin pressure under the sealing condition with the adjustment of the moving cabin adjusting structure. The weighing unit is provided with a weighing disc, and the weighing disc is used for weighing the weight of the sample. The weighing unit is installed at the notch of the stator, and the weighing disc is flush with the inner concave surface of the stator and does not contact the inner concave surface of the stator.

6. An automatic calibration method of an organic matter desorption and adsorption characteristic measuring device, the method comprising the following steps: S1: parameter setting stage: opening the sealing door of the environment cabin, placing an empty sample box between the handle teeth of the rotor, setting the initial value and gradient series value of atmospheric pressure, the initial value and gradient series value of temperature, the initial value and gradient series value of humidity, the rotor rotation period, the rotation interval period, the pre-equilibrium period, and the dynamic equilibrium period on the control unit. ​ ​ ​ ​ ​ 2. The organic substance moisture desorption and adsorption characteristic measuring apparatus according to claim 1, wherein ​ 3. The organic substance moisture desorption and adsorption characteristic measuring apparatus according to claim 2, wherein ​ 4. The organic substance moisture desorption and adsorption characteristic measuring apparatus according to claim 3, wherein ​ 5. The organic material moisture desorption and adsorption characteristics measuring apparatus according to claim 4, wherein ​ ​ ​ S2: pre-equilibrium stage: close the sealing door, start the simulation calibration device, the temperature adjusting unit, the humidity adjusting unit, the air pressure adjusting unit start to work, and the measurement information is fed back to the control unit through the communication unit for driving the temperature adjusting unit, the humidity adjusting unit, the air pressure adjusting unit, until the atmospheric environment in the environmental cabin meets the set level, and then the pre-equilibrium period is balanced; S3: the rotor rotates in a step-by-step manner for one revolution, each sample box is pushed into the weighing unit for weighing, and the weighing unit is transmitted to the control unit through the communication unit, and each sample box is marked as zero weight through the control unit; S4: reference weighing stage: open the environmental cabin sealing door, quickly put the absolute dry organic matter into each sample box, and reserve one sample box as empty for system calibration; quickly close the sealing door, and the rotor rotates in a step-by-step manner for one revolution to weigh and record the original weight of each sample; S5: measurement stage: after the reference weighing, the rotor weighs each sample box at a set rotation interval period and transmits it to the control unit through the communication unit, until the sample weight in the sample box no longer increases due to moisture absorption, and the control unit determines that the sample enters dynamic equilibrium and records the time and equilibrium weight when it reaches equilibrium; S6: dynamic equilibrium stage: when all the sample boxes reach dynamic equilibrium, the measurement state of the sample is maintained for a set dynamic equilibrium period, and the initial gradient moisture absorption test is completed; S7: cyclic moisture absorption stage: the control unit automatically increases the set value of air pressure or temperature or humidity according to the set gradient, and commands the environmental atmosphere device to perform the cyclic automatic moisture absorption test of S5-S6 steps in order from low to high, until the moisture absorption test of the high limit value of the gradient is completed; S8: cyclic moisture absorption stage: after the moisture absorption test of the high limit value of the gradient is completed, the cyclic automatic moisture absorption test of S7 step is performed in order from high to low, until the moisture absorption test of the gradient returns to the initial set value is completed; S9: Calibration phase: the control unit calculates and outputs the moisture content, equilibrium time, hygroscopic equilibrium, dehumidification equilibrium and "moisture content-time" broken line graph under each equilibrium state, wherein the moisture content under each equilibrium state includes C n,湿基 and C n,干基 , and the calibration formula is: ； ； In the formula, C 干基,i,j is the moisture content of the dry basis, which refers to the proportion of the water mass in the absolute dry material mass, wherein the dry material mass is equal to the material mass minus the water mass, C 湿基,i,j is the moisture content of the wet basis, which refers to the proportion of the water mass in the material mass, unit %; M refers to the weight, unit g; "0" represents absolute dry; i refers to the sample box serial number, taking 1, 2, 3, …, n natural numbers; j represents the point on the time sequence, taking 1, 2, 3, …, n natural numbers.

7. The automatic calibration method of the organic matter deliquescence and hygroscopicity measuring device according to claim 6, characterized in that, Wherein, The parameters of S1 are specifically set as: the rotor rotation period is sample number x 6 s, the rotation interval period is multiple of the rotation period and ≤10 min, the pre-equilibrium period is 30-35 min, and the dynamic equilibrium period is 8-8.5 h.

8. The automatic calibration method of the organic substance deliquescence and hygroscopicity measuring apparatus according to claim 7, wherein The pre-equilibrium period is 30 min, and the dynamic equilibrium period is 8 h.

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