A wheat seed moisture detection device and a detection method thereof

Abstract

The application discloses a wheat seed moisture detection method, comprising the following steps: S1, placing a certain mass of wheat seeds in a detection cavity with a weighing device, and introducing a T1 temperature airflow into the detection cavity at the T1 temperature to perform drying treatment; recording the weight of the wheat seeds at intervals, and arranging to form a weight change sequence of the wheat seeds; S2, continuing to perform drying treatment on the wheat seeds in the detection cavity at a T2 temperature, in a T2 temperature airflow environment and in a vibrating state, recording the results; S3, continuing to vibrate and dry the wheat seeds in the detection cavity at T3...T n n temperatures according to the method of S2 until the weight change of the wheat seeds is within a specified range, and obtaining n groups of weight change sequences of the wheat seeds under different temperature conditions; S4, extracting typical characteristics in the n groups of weight change sequences, comparing the typical characteristics with a database, and determining the age of the wheat seeds.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seed moisture detection, and particularly relates to a wheat seed moisture detection device and a detection method thereof. BACKGROUND

[0002] Wheat is a major food crop and an important strategic reserve food variety in China, and plays an important role in the production, circulation and consumption of food. The moisture content of seeds is an important indicator of seed quality, and the moisture content of seeds is closely related to the maturity, aging degree and storage life of seeds. After a period of storage, the moisture content of newly harvested wheat seeds gradually decreases with the extension of storage time, that is, different degrees of aging occur with the extension of storage time.

[0003] This aging not only affects seed germination, seedling growth, and the quality and quality of seeds in later stages, but also has a serious impact on the preservation, development and utilization of germplasm resources. Therefore, monitoring the aging degree of wheat seeds and analyzing the physiological property changes of seed moisture in the aging process are crucial for the storage and development and utilization of wheat seeds.

[0004] Therefore, it is necessary to improve the moisture detection method in the prior art to solve the problem of monitoring seed aging. SUMMARY

[0005] The present application overcomes the shortcomings of the prior art and provides a wheat seed moisture detection device and a detection method thereof. Since the moisture content of wheat seeds of different ages is different under the same storage condition, only the moisture penetration and migration rules of wheat seeds in the aging process need to be analyzed, and big data needs to be established, so that the age of the wheat seeds can be determined. Specifically, considering the water migration mechanism of the wheat seeds in the drying process, the wheat seeds are repeatedly dried and vibrated in the detection cavities of T1, T2, T3, …, T n temperature, until the weight change of the wheat seeds is within a specified range, the typical characteristics of the moisture drying of the wheat seeds are obtained according to each drying and vibration, and the age of the wheat seeds is determined.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a wheat seed moisture detection method, comprising the following steps:

[0007] S1, a certain mass of wheat seeds are placed in a detection cavity with a weighing device, and a T1 temperature airflow is introduced into the detection cavity of T1 temperature for drying treatment; at this time, the free water in the deep layer, shallow layer and surface layer of the seeds is quickly separated, the weight of the wheat seeds is recorded at intervals, and the weight change sequence of the wheat seeds is formed;

[0008] S2, the wheat seeds continue to be detected in the detection cavity of T2 temperature, in the airflow of T2 temperature, and the results are recorded;

[0009] S3, according to the method of S2, continue to be detected in the detection cavity of T3……T n Temperature, and the weight change sequence of the n groups of wheat seeds under different temperature conditions is obtained until the weight change of the wheat seeds is within the specified range;

[0010] S4, extracting the typical characteristics in the n groups of weight change sequences, comparing the typical characteristics with the database, and determining the age of the wheat seeds.

[0011] In a preferred embodiment of the present application, the measurement period in S1 is 1s, 5s or 10s.

[0012] In a preferred embodiment of the present application, the typical characteristics include: the moisture removal rate each time, the moisture removal amount each time and the number of vibrations or drying required to reach the specified range.

[0013] In a preferred embodiment of the present application, T1, T2, T3……T n are sequentially decreased.

[0014] In a preferred embodiment of the present application, the database stores the dehydration characteristics data of wheat seeds of different ages under the same storage condition.

[0015] In the S2, the temperature of the deep layer, the shallow layer and the surface layer of the wheat seeds is sequentially decreased from inside to outside, and the water in the deep layer and the shallow layer of the wheat seeds gradually migrates to the surface layer due to the water potential, vibration and heat transfer.

[0016] The present application provides a wheat seed moisture detection device, which is applied to the wheat seed moisture detection method described above: the moisture detection device comprises a rack, a detection cavity arranged on the rack, a vibration assembly connected with the detection cavity, and a drying assembly connected with the detection cavity; the vibration assembly drives the vibration of the detection cavity at a certain frequency and amplitude.

[0017] In a preferred embodiment of the present application, the detection cavity is divided into several layers by several partition plates, which are used to uniformly distribute a certain amount of wheat seeds.

[0018] In a preferred embodiment of the present application, the drying assembly comprises an ejector, a ventilation unit, a micro-explosion unit and a circulation unit connected with the input end of the ejector, and a water vapor separation unit and a temperature control unit connected with the output end of the ejector.

[0019] In a preferred embodiment of the present application, the micro-explosion unit comprises a micro-explosion cavity, an air storage unit and an air filter unit connected to the micro-explosion cavity, and an ignition electrode arranged inside the micro-explosion cavity.

[0020] In a preferred embodiment of the present application, the micro-explosion cavity and the ejector are connected through a pipeline, and the pipeline has a meandering curved structure.

[0021] In a preferred embodiment of the present application, the detection cavity has a heat preservation composite structure, and comprises, from outside to inside, an outer heat preservation layer, an intermediate heat preservation layer and an inner heat preservation layer.

[0022] In a preferred embodiment of the present application, the partition plate is provided with a plurality of air holes for connecting different layers.

[0023] In a preferred embodiment of the present application, the input end of the ejector comprises a first input port, a second input port and a third input port.

[0024] In a preferred embodiment of the present application, the sizes of the first input port, the second input port and the third input port decrease in sequence.

[0025] In a preferred embodiment of the present application, the ejector comprises a shell, a primary nozzle and a secondary nozzle arranged inside the shell, a primary mixing cavity arranged between the primary nozzle and the secondary nozzle, a secondary mixing cavity connected to the secondary nozzle, and an expansion cavity connected to the secondary mixing cavity.

[0026] In a preferred embodiment of the present application, the input end of the primary nozzle is connected to the first input port, the second input port is connected to the shell at the position of the first mixing cavity, and the third input port is connected to the shell at the position of the secondary mixing cavity.

[0027] In a preferred embodiment of the present application, the air storage unit stores micro-explosion gas, and the micro-explosion gas is methane or ethane.

[0028] In a preferred embodiment of the present application, the concentration of the micro-explosion gas is between the upper limit and the lower limit of micro-explosion.

[0029] The present application solves the defects in the background art and has the following beneficial effects:

[0030] (1) The present application provides a wheat seed moisture detection device, which sequentially places the wheat seeds in T1, T2, T3... T n The detection cavity is repeatedly dried and vibrated until the weight change of the wheat seeds is within a specified range, the typical characteristics of the moisture drying of the wheat seeds are obtained according to each drying and vibration, and the age of the wheat seeds is determined.

[0031] (2) According to the moisture migration mechanism of the wheat seeds in the drying process, the present application processes the wheat seeds in intervals between drying and heat preservation vibration, avoids the shrinkage of the wheat seed coat caused by long-time drying, which leads to the increase of membrane resistance, uses vibration to make the wheat seeds obtain energy, and further increases the water potential of the wheat seeds, thereby maximizing the water migration rate of the wheat seeds, realizing the shortest time of wheat seed drying, and greatly saving the detection time.

[0032] (3) The present application uses the high-pressure and high-flow gas generated by the micro-explosion unit to inject the relatively low-pressure gas in the ventilation unit, realizes the pressure increase and flow increase of the low-pressure gas in the ventilation unit, and uses the high temperature generated by the short-time explosion of the micro-explosion unit to heat the gas in the ventilation unit, thereby improving the drying rate of the seeds. When the mixed hot gas flow in the ejector directly acts on the surface of the wheat seeds, the heat in the hot gas flow is transferred to the surface of the seeds, and then transferred from the surface to the inside of the seeds, forming a heat transfer process. At the same time, the free water in the seeds diffuses from the inside to the surface of the seeds in a gaseous state, and then diffuses to the detection cavity through the gas film on the surface of the seeds, thereby reducing the water content of the seeds.

[0033] (4) In the present application, the micro-explosion chamber and the ejector are connected through a pipeline, which is a meandering curved structure, reducing the extension path of the micro-explosion reaction, preventing the reaction from diffusing to the ejector, and improving the safety. From the root, the conditions of micro-explosion are reduced, and with diffusion, the concentration of micro-explosion gas is reduced, which cannot meet the lower limit of micro-explosion in the extension path, thereby preventing long-distance diffusion of the reaction. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor;

[0035] Figure 1 is a flow chart of a wheat seed moisture detection method according to a preferred embodiment of the present application;

[0036] Figure 2 is a structural schematic diagram of a wheat seed moisture detection device according to a preferred embodiment of the present application;

[0037] Figure 3 is a structural schematic diagram of the ejector of the preferred embodiment of the present application;

[0038] In the figure: 1, base; 2, vibration motor; 3, vibration spring; 4, detection cavity; 41, partition plate; 5, ejector; 51, first input port; 52, second input port; 53, third input port; 54, main nozzle; 55, secondary nozzle; 56, main mixing cavity; 57, secondary mixing cavity; 58, diffuser cavity. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0040] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than those described herein, and therefore the scope of the application is not limited to the details of the following description.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" 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 purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", and the like are only used for the purpose of description and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] As shown in Figure 1 , a flow chart of a wheat seed moisture detection method in the present application is shown. The wheat seed moisture detection method comprises the following steps:

[0044] S1, a certain mass of wheat seeds are placed in a detection cavity 4 with a weighing device, and a T1 temperature airflow is introduced into the detection cavity 4 at T1 temperature for drying treatment; at this time, the free water in the deep layer, shallow layer and surface layer of the seeds is quickly separated, the weight of the wheat seeds is recorded at intervals, and the weight change sequence of the wheat seeds is formed;

[0045] S2, the wheat seeds continue to be in the detection cavity 4 at T2 temperature, no airflow environment and vibration state, at this time, the temperature of the deep layer, shallow layer and surface layer of the wheat seeds presents a decrease from inside to outside, and the water in the deep layer and shallow layer of the wheat seeds gradually migrates to the surface layer due to the water potential, vibration and heat transfer effect; a T2 temperature airflow is introduced into the detection cavity 4 at T2 temperature for re-drying treatment, and the results are recorded at the same time;

[0046] S3, according to the method of S2, continue to vibrate and dry in the detection cavity 4 at T3……T n temperature until the weight change of the wheat seeds is within a specified range, and n groups of weight change sequences of the wheat seeds under different temperature conditions are obtained;

[0047] S4, extract the typical characteristics in the n groups of weight change sequences, compare the typical characteristics with the database, and then determine the age of the wheat seeds.

[0048] The typical characteristics in the present application include: the water removal rate each time, the water removal amount each time and the number of vibrations or drying required to reach the specified range. Among them, T1, T2, T3……T n present a decrease in turn. The dehydration characteristic data of the wheat seeds of different age groups under the same storage condition are stored in the database.

[0049] The specified range in S3 of the present application is that the weight change of the wheat seeds is that the moisture content between the two drying times before and after the seed is not more than 0.01%.

[0050] The physiological characteristics of the seed in the dehydration process and the combination among the deep layer, the shallow layer and the surface layer of the seed are the basis for promoting heat and mass transfer, and the vibration with a certain frequency and amplitude can make the water flow resistance in the capillary hole of the seed smaller, so that the water potential gradient is increased, which is beneficial to mass transfer, so that the drying effect is high.

[0051] The embodiment considers that the water migration in the wheat seed is in the form of penetration or diffusion in the process of water migration of the seed according to the water migration mechanism of the wheat seed in the drying process. The wheat seed has water content, permeability and dry shrinkage in the embodiment. The permeability is reflected in that the water migration process of the wheat seed is regarded as a penetration system, and the seed coat is equivalent to the'semi-permeable membrane' of the penetration system and only allows water to pass through. In the actual drying process, the free water in the surface layer is quickly lost, and the shallow layer and the deep layer gradually migrate water to the low water content part as the high water content part, that is, the driving force of water migration is the water content gradient. The water content is reflected in that the seed is divided into the surface layer, the shallow layer and the deep layer, including free water and bound water. The dry shrinkage is reflected in that the wheat seed is a capillary porous material in the microcosmic aspect and has the characteristics of dry shrinkage and wet expansion. In the drying process of the wheat seed, the seed coat will shrink or wrinkle due to the decrease of water, so that the water in the shallow layer and the deep layer tends to move to the surface layer.

[0052] In a preferred embodiment, four times of drying and three times of vibration are preferably used. The T1, T2, T3 and T4 temperatures are 100 DEG C, 80 DEG C, 60 DEG C and 40 DEG C respectively.

[0053] According to the water migration mechanism of the wheat seed in the drying process, the drying and the heat preservation vibration interval are used to process the wheat seed, so that the shrinkage of the wheat seed coat caused by long time drying is avoided, the membrane resistance is increased, the vibration is used to make the wheat seed obtain energy, so that the water potential of the wheat seed is increased, the water migration rate of the wheat seed is maximally stimulated, the drying of the wheat seed in the shortest time is realized, and the detection time is greatly saved.

[0054] As shown in Figure 2 The wheat seed water detection device provided by the application is suitable for detecting the aging degree of the wheat seed under the same storage condition.

[0055] The water detection device comprises a rack, a detection cavity 4 arranged on the rack, a vibration assembly connected with the detection cavity 4 and a drying assembly connected with the detection cavity 4.

[0056] The detection cavity 4 in the application is not limited to using a cubic or cylindrical structure. The detection cavity 4 in the application is a heat preservation composite structure, which comprises, from outside to inside, an outer heat preservation layer, an intermediate heat preservation layer and an inner heat preservation layer. The outer heat preservation layer is a steel wire framework board sprayed with polyurethane, the intermediate heat preservation layer is a polyurethane hard foam heat preservation board, and the inner heat preservation layer is one of superfine glass wool or mineral wool.

[0057] The detection cavity 4 in the application is divided into several layers by several partition plates 41, which are used to uniformly distribute a certain amount of wheat seeds and prevent the accumulation of wheat seeds during the aging degree detection process, so that the contact of part of the wheat seeds with the hot air flow is not sufficient, and facilitate the vibration of the wheat seeds in the detection cavity 4 to generate a larger seed gap and contact area.

[0058] The partition plate 41 in the application is provided with a plurality of air holes for connecting different layers.

[0059] The weighing device is arranged on each partition plate 41 in the application, which is used to measure the real-time water content of the wheat seeds. The water content of the wheat seeds is the percentage of the weight of the water (free water and bound water) contained in the seeds to the weight of the seeds. The real-time water content of the wheat seeds is the weight change of the seeds before and after a period of time, and the period of time is not limited to 1s, 5s or 10s.

[0060] The vibration assembly in the application is the base 1, and the vibration motor 2 and the vibration spring 3 arranged on the base 1. The vibration motor 2 generates an excitation force to make the detection cavity 4 vibrate. The vibration time is 20-30min. The frequency of vibration in the application is positively correlated with the rate of water migration of the wheat seeds.

[0061] The drying assembly of the application comprises an ejector 5, a ventilation unit, a micro-explosion unit and a circulation unit connected to the input end of the ejector 5, and a water vapor separation unit and a temperature control unit connected to the output end of the ejector 5.

[0062] The output end of the water vapor separation unit in the application is connected to the inside of the detection cavity 4 through a flexible pipeline. When the detection cavity 4 vibrates, the ventilation unit, the micro-explosion unit and the circulation unit of the ejector 5 in the application do not resonate with the detection cavity 4.

[0063] As shown in Figure 3 The application provides a structural diagram of the ejector 5. The input end of the ejector 5 in the application comprises a first input port 51, a second input port 52 and a third input port 53. The first input port 51 is used to connect the micro-explosion unit, the second input port 52 is used to connect the ventilation unit, and the third input port 53 is used to connect the circulation unit. The sizes of the first input port 51, the second input port 52 and the third input port 53 in the application decrease in turn.

[0064] The ejector 5 in the application comprises a shell, a primary nozzle 54 and a secondary nozzle 55 arranged inside the shell, a primary mixing chamber 56 arranged between the primary nozzle 54 and the secondary nozzle 55, a secondary mixing chamber 57 communicated with the secondary nozzle 55, and a diffuser chamber 58 connected with the secondary mixing chamber 57. The input end of the primary nozzle 54 is communicated with the first input port 51, the second input port 52 is arranged in the circumferential direction of the shell at the position of the first mixing chamber, and the third input port 53 is arranged in the circumferential direction of the shell at the position of the secondary mixing chamber 57. The diffuser chamber 58 is a structure in which the throat diameter of the mixing chamber gradually increases in the axial direction to expand the pressure.

[0065] The micro-explosion unit in the application comprises a micro-explosion chamber, a gas storage unit and an air filtering unit connected with the micro-explosion chamber, and an ignition electrode arranged inside the micro-explosion chamber.

[0066] The micro-explosion gas is stored in the gas storage unit, the air filtering unit is used to filter dust particles and moisture in the air, and to reduce incomplete combustion when the micro-explosion gas reacts with the air.

[0067] The micro-explosion chamber is a closed reaction space. When the micro-explosion reaction starts for a period of time or the micro-explosion chamber reaches a pressure limit close to the pressure limit, the micro-explosion reaction is basically completed at this time, and the curved pipeline ensures that the gas generated by the micro-explosion gas is completely reacted when it reaches the ejector 5.

[0068] The micro-explosion gas in the application needs to meet the following conditions: non-toxic, relatively stable chemical properties, and short diffusion distance of micro-explosion. The preferred micro-explosion gas in the application is methane or ethane. In the case of complete micro-explosion and incomplete micro-explosion, such gas is non-toxic and will not have a toxic effect on wheat seeds.

[0069] The upper limit and the lower limit of the micro-explosion of methane are 15.4% (V / V) and 5.0% (V / V), and the upper limit and the lower limit of the micro-explosion of ethane are 16.0% (V / V) and 3.0% (V / V). Since the micro-explosion reaction of the micro-explosion gas must meet the condition that the concentration is within the micro-explosion limit range, in order to reduce the diffusion distance of the micro-explosion, the concentration of the micro-explosion gas in the micro-explosion reaction in the application only needs to reach the upper limit of the micro-explosion, that is, only needs to reach the micro-explosion condition.

[0070] The ventilation unit in the application comprises a fan, a filter and a water vapor separation unit. The gas blown by the fan passes through the filter and the water vapor separation unit to remove impurities and moisture, and then enters the second input port 52.

[0071] The circulation unit in the application comprises a circulation pipeline connected with the gas outlet of the detection chamber 4, and a circulation pump and a water vapor separation unit arranged on the circulation pipeline. The gas in the detection chamber 4 is pumped out by the circulation pump, and then passes through the water vapor separation unit to filter the moisture therein, and then enters the ejector 5 through the third input port 53.

[0072] The temperature control unit in the application is located at the output end of the water vapor separation unit and communicates with the detection cavity 4. The temperature control unit is used to cool the hot gas flow at the output end of the water vapor separation unit, so that the hot gas flow reaches the specified T1, T2, T3……T n temperature.

[0073] In the application, the micro-explosion unit generates high-temperature, high-pressure and high-flow gas, while the ventilation unit inhales low-temperature, low-pressure and low-flow gas. In the application, the high-temperature, high-pressure and high-flow gas generated by the micro-explosion unit enters the first input port 51 and the main nozzle 54, is injected to the center position of the main mixing cavity 56 through the main nozzle 54, while simultaneously entraining and mixing the low-temperature, low-pressure and low-flow gas in the second input port 52. The mixed gas enters the secondary nozzle 55 as the “main flow”, is injected to the center position of the secondary mixing cavity 57 through the secondary nozzle 55, while simultaneously entraining and mixing the gas in the third input port 53; the mixing, heat transfer, uniform speed and uniform pressure of the three gases in the secondary mixing cavity 57 are realized, and then the mixed gas is delivered to the pressure expansion cavity 58, expanded, and then enters the water vapor separation unit, so that the moisture in the mixed hot gas flow is completely removed. The temperature control unit cools the hot gas flow according to the actual drying temperature required, so that the temperature is reduced to the specified temperature, and then the hot gas is introduced into the detection cavity 4.

[0074] The micro-explosion unit in the application has the following effects: the high-pressure and high-flow gas generated by the micro-explosion unit induces the relatively low-pressure gas, realizes the pressure increase and flow increase of the low-pressure gas in the ventilation unit, and heats and transfers the gas in the ventilation unit through the high temperature generated by the short-time explosion of the micro-explosion unit, thereby improving the drying rate of the seeds. When the mixed hot gas flow in the ejector 5 directly acts on the surface of the wheat seeds, the heat in the hot gas flow is transferred to the surface of the seeds, and then transferred from the surface to the inside of the seeds, forming a heat transfer process. At the same time, the free water in the seeds diffuses from the inside to the surface of the seeds in a gaseous state, and then diffuses to the detection cavity 4 through the gas film on the surface of the seeds, thereby reducing the water content of the seeds.

[0075] In the application, the micro-explosion cavity and the ejector 5 are connected through a pipeline, which is a meandering curved structure, reducing the extension path of the micro-explosion reaction, preventing the reaction from diffusing to the ejector 5, and improving safety. The micro-explosion condition is reduced from the root, and with the diffusion, the concentration of the micro-explosion gas is reduced, which cannot meet the lower limit of the micro-explosion in the extension path, thereby preventing long-distance diffusion of the reaction.

[0076] Example one

[0077] The embodiment is improved on the basis of the above, and the vibration structure is replaced by an elastic unit arranged on the partition plate 41, each elastic unit is connected with the curved pipeline through a pipeline, and the curved pipeline is not communicated with the ejector 5, the high-pressure gas generated by the micro-explosion unit is only transported to the elastic unit for expansion of the elastic unit. The elastic unit is preferably a buffer air bag. The kinetic energy of the high-pressure gas generated by the micro-explosion unit is applied to the elastic unit through the pipeline, so that the elastic potential energy of the compressed elastic unit is released, and then the wheat seeds on the partition plate 41 are vibrated.

[0078] The buffer air bag in the embodiment is a composite material, and from the inside to the outside, it is a high-temperature-resistant layer, a rubber layer, a high-elasticity layer and a contact layer in sequence. The high-temperature-resistant layer is a high-temperature-resistant mineral wool layer, which protects the rubber layer and the high-elasticity layer. The rubber layer is a polymeric material with reversible deformation, which is elastic and can produce large deformation under external force, and can quickly recover to the original state after the external force is removed. Here, the rubber layer is preferably one of natural rubber or butadiene rubber. The high-elasticity layer is a polyester elastomer material, a propylene-based elastomer material and a fluorosilicon polymer material, the propylene-based elastomer material is arranged outside the polyester elastomer material, and the fluorosilicon polymer material is arranged outside the propylene-based elastomer material. The high-elasticity layer further increases the deformation capacity and strength of the rubber layer. The contact layer in the embodiment directly contacts the wheat seeds, and the contact layer is synthetic rubber and nanometer boron fiber, which can significantly improve the wear resistance and strength of the contact layer, and improve the service life of the buffer air bag. In the present application, the buffer air bag is used to vibrate the seeds, compared with the above-mentioned vibration motor 2 vibrating the whole detection cavity 4, directly vibrating the seeds on the partition plate, reducing the mechanical loss, and completely avoiding resonance of other parts.

[0079] In actual use of the present application, only a small part of the wheat seeds in each storage chamber is taken for moisture detection, and then the storage life of the wheat seeds in the corresponding storage chamber is obtained.

[0080] The above is based on the ideal embodiment of the present application, and through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A method of detecting moisture in wheat seeds, characterized by, The application discloses a wheat seed moisture detection device, which comprises a rack, a detection cavity arranged on the rack, a vibration assembly connected with the detection cavity, and a drying assembly connected with the detection cavity; the vibration assembly drives the vibration of the detection cavity at a certain frequency and amplitude. The drying assembly comprises an ejector, a ventilation unit, a micro-explosion unit and a circulation unit connected with the input end of the ejector, and a water vapor separation unit and a temperature control unit connected with the output end of the ejector. The input end of the ejector comprises a first input port, a second input port and a third input port, the first input port is used for connecting the micro-explosion unit, the second input port is used for connecting the ventilation unit, and the third input port is used for connecting the circulation unit. The micro-explosion unit generates high-temperature, high-pressure and high-flow gas, and the ventilation unit blows in low-temperature, low-pressure and low-flow gas. The temperature control unit is located at the output end of the water vapor separation unit and is in communication with the detection cavity, and is used for cooling the hot gas flow at the output end of the water vapor separation unit. The application further discloses a wheat seed moisture detection method, which comprises the following steps: S1, a certain mass of wheat seeds are placed in the detection cavity with a weighing device, and T1-temperature gas flow is blown into the detection cavity at T1 temperature for drying treatment; at this time, the free water in the deep layer, shallow layer and surface layer of the seeds is quickly separated, the weight of the wheat seeds is recorded at intervals, and the weight change sequence of the wheat seeds is formed; S2, the wheat seeds continue to be treated in the detection cavity at T2 temperature, in a gas flow-free environment and in a vibration state, at this time, the temperature of the deep layer, shallow layer and surface layer of the wheat seeds gradually decreases from inside to outside, and the water in the deep layer and shallow layer of the wheat seeds gradually migrates to the surface layer due to the water potential, vibration and heat transfer; T2-temperature gas flow is blown into the detection cavity at T2 temperature for re-drying treatment, and the results are recorded at the same time; The drying and heat preservation vibration are performed at intervals, so that the shrinkage of the wheat seed coat caused by long-time drying is avoided, and the increase of the membrane resistance is avoided. S3, according to the method of S2, continue to T3…T n The temperature detection cavity is kept vibrating and drying until the weight change of the wheat seeds is within a specified range, and a weight change sequence of the n groups of wheat seeds under different temperature conditions is obtained. S4, typical characteristics in n groups of weight change sequences are extracted, the typical characteristics are compared with a database, and the age of the wheat seeds is determined. wherein T1, T2, T3...Tn are the time points of the n consecutive time points. n The presentation is sequentially decreasing.

2. The method of claim 1, wherein: The typical characteristics comprise the water removal rate, the water removal amount and the number of vibrations or drying required to reach a specified range.

3. The method of claim 1, wherein: The database stores the dehydration characteristic data of the wheat seeds of different ages under the same storage condition.

4. The method of claim 1, wherein: The detection cavity is divided into several layers by a plurality of partition plates, and is used for uniformly distributing the certain mass of wheat seeds.

5. The method of claim 1, wherein: The micro-explosion unit comprises a micro-explosion cavity, a gas storage unit and an air filter unit connected with the micro-explosion cavity, and an ignition electrode arranged in the micro-explosion cavity.

6. The method of claim 5, wherein: The micro-explosion cavity and the ejector are connected through a pipeline, and the pipeline has a meandering curved structure.

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