A micro-damage sampling device and detection method for detecting internal quality characteristics of pomelo fruit

Abstract

The present invention discloses a micro-damage type sampling device and detection method for detecting internal quality characteristics of pomelos. The micro-damage type sampling device for detecting internal quality characteristics of pomelos according to the present invention includes a sampling needle, a gas sampler, and a filter. When detecting the internal quality characteristics of a pomelo, the sampling needle can penetrate the peel of the pomelo from the bottom in a micro-damaged manner and extend to the center of the interior of the pomelo, and the gas sampler collects the gas inside the center of the pomelo in a micro-damaged manner through an air outlet core, directly obtaining the gas volatiles in the gas collection space at the center of the interior of the pomelo, so as to realize micro-damage sampling for detecting the internal quality characteristics of the pomelo. The micro-damage type detection method for internal quality characteristics of pomelos according to the present invention uses the above-mentioned micro-damage type sampling device for detecting internal quality characteristics of pomelos to perform detection and sampling, so as to realize non-destructive and accurate detection of the internal quality characteristics of pomelos.

Description

Technical Field

[0001] The invention relates to the technical field of pomelo fruit internal quality characteristic detection, and in particular to a micro-damage pomelo fruit internal quality characteristic detection sampling device and detection method. Background Art

[0002] Pomelo is a large, thick-skinned fruit with an oil cell layer and a spongy layer on its skin. The flesh is also wrapped in a pericarp, making it difficult to perform accurate non-destructive testing of its internal quality. Slice testing is likely to result in a waste of flesh.

[0003] At present, the main non-destructive internal quality inspection methods for pomelo include visible / near-infrared reflectance spectroscopy, visible / near-infrared transmission spectroscopy, and other non-destructive inspection methods such as machine vision and electronic nose. However, it is not feasible to use visible / near-infrared reflectance spectroscopy because the skin is thick and it is impossible to obtain the characteristic information of the flesh. The use of visible / near-infrared transmission spectroscopy causes serious signal attenuation due to the thick skin, low signal-to-noise ratio, and poor detection accuracy. It is also difficult to obtain sufficient characteristic information of the flesh using other non-destructive inspection methods such as machine vision and electronic nose. Summary of the invention

[0004] In order to solve the problem of difficulty in accurately and non-destructively detecting the internal quality of pomelo fruit in the prior art, the present invention provides a micro-damage type sampling device for detecting the internal quality characteristics of pomelo fruit.

[0005] The purpose of the present invention is also to provide a method for detecting the internal quality characteristics of pomelo fruit with slight damage, which adopts the above-mentioned sampling device for detecting the internal quality characteristics of pomelo fruit with slight damage to realize accurate and slight damage detection of the internal quality of pomelo fruit.

[0006] The purpose of the present invention is achieved through the following technical solutions.

[0007] A micro-damage type grapefruit internal quality characteristics detection sampling device, comprising

[0008] A sampling needle, wherein the sampling needle is provided with an air supply core and an air outlet core; the sampling needle is also provided with an air supply port and an air inlet which can be opened and closed, the air supply port is connected with the air supply core, and the air inlet is connected with the air outlet core; and the air supply port and the air inlet are both located at the front end of the sampling needle;

[0009] An air collector, the air collector is connected to the air outlet core;

[0010] A filter is communicated with the air replenishing core.

[0011] In a preferred embodiment, an electromagnet-type magnetic pole controller is provided at the rear end of the sampling needle, which can make the air supply core and the air outlet core generate magnetism; the air supply port is provided with an air supply cover that can be opened and closed by magnetic control, and the air inlet is provided with an air outlet cover that can be opened and closed by magnetic control.

[0012] In a more preferred embodiment, the electromagnetic pole controller comprises a positive and negative current converter, a first coil and a second coil;

[0013] The first coil is sleeved on the rear end of the air outlet core, and the second coil is sleeved on the rear end of the air replenishing core; the first coil and the second coil are both connected to the positive and negative current converter.

[0014] In a more preferred embodiment, the materials of the air supply cover and the air outlet cover are both fused with magnetic materials, and the air supply cover and the air outlet cover are both inherently magnetic.

[0015] In a further preferred embodiment, the material of the air supply cover incorporates a material with an S-pole magnetism, so that the air supply cover has an S-pole magnetism; the material of the air outlet cover incorporates a material with an S-pole magnetism, so that the air outlet cover has an S-pole magnetism.

[0016] In a more preferred embodiment, a needle handle is provided at the rear end of the sampling needle; and the electromagnet type magnetic pole controller is disposed in the needle handle.

[0017] In a further preferred embodiment, a touch screen controller is provided on the needle handle; the touch screen controller is connected to the electromagnet type magnetic pole controller.

[0018] In a preferred embodiment, the rear end of the gas outlet core is connected to the gas sampler through an external sampling gas pipe, and the rear end of the gas supply core is connected to the filter through an external gas supply pipe.

[0019] In a preferred embodiment, the air-supplementing core and the air-exiting core are respectively arranged on the left and right sides of the sampling needle, and the air inlet is located in front of the front end of the sampling needle relative to the air-supplementing port.

[0020] In a preferred embodiment, the front end of the sampling needle has a needle cap with a pointed tip.

[0021] In a preferred embodiment, the gas collector includes an electronic nose, a manual disposable extraction tube or a micro electric vacuum pump. The electronic nose can effectively identify the aromatic component content, maturity, storage time, sugar content, diseases, etc. of the fruit, thereby more effectively improving the detection accuracy in the process of detecting the internal quality characteristics of pomelo fruit.

[0022] The above-mentioned micro-damage type pomelo internal quality characteristics detection sampling device can be used for micro-damage pomelo internal quality characteristics detection sampling. Although the pomelo peel is thick and the fruit is large, the oil cell layer of the pomelo peel is extremely thin, the sponge layer is thick but the structure is loose, which is the natural protective shell of the flesh. The flesh is ringed in a petal shape, so that the pomelo fruit is hollow in the middle. And because the pomelo flesh cyst skin is thin, the hollow in the middle of the pomelo fruit forms a natural gas collection space with the smell characteristics of the pomelo flesh. The micro-damage caused by the sampling needle passing through the peel from the bottom of the pomelo fruit will not only not affect the quality of the pomelo fruit, but also directly reach the space in the center of the flesh. Through the air outlet core airway collection on the sampling needle, the gas volatiles in the gas collection space in the center of the pomelo fruit can be directly obtained, and then the quality of the pomelo fruit can be accurately judged through the external analysis instrument, so that the quality characteristic information of the pomelo fruit can be accurately obtained.

[0023] A method for detecting the internal quality characteristics of pomelo fruit by micro-damage, using any of the above-mentioned sampling devices for detecting the internal quality characteristics of pomelo fruit by micro-damage to perform sampling detection, comprises the following steps:

[0024] (1) purifying the air supply core and the air outlet core pipeline of the sampling needle;

[0025] (2) Disinfect the sampling needle with alcohol, wash away the residual alcohol on the surface of the sampling needle with clean water, and wipe the sampling needle dry with absorbent paper;

[0026] (3) The sampling needle is inserted into the inner center from the bottom of the pomelo fruit, and the gas collector is started;

[0027] (4) opening the air inlet of the air outlet core;

[0028] (5) opening the air supply port of the air supply core;

[0029] (6) the gas collector starts to collect gas from the center of the pomelo fruit for analysis;

[0030] (7) After the gas collection is completed, the gas inlet of the gas outlet core and the gas supply port of the gas supply core are closed;

[0031] (8) pulling out the sampling needle from the bottom of the pomelo fruit to end the gas sampling at the center of the pomelo fruit;

[0032] (9) Analyze and evaluate the internal quality of the pomelo fruit based on the collected central gas inside the pomelo fruit.

[0033] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0034] The micro-damage sampling device for detecting the internal quality characteristics of pomelo fruit of the present invention comprises a sampling needle, a gas sampler and a filter. The sampling needle is a thin needle and has an air replenishing core and an air outlet core respectively connected to the filter and the gas sampler. The air replenishing port of the air replenishing core and the air inlet of the air outlet core are both located at the front end of the sampling needle. When detecting the internal quality characteristics of pomelo fruit, the sampling needle can pass through the peel of the pomelo fruit from the bottom of the pomelo fruit with micro-damage and penetrate into the center of the pomelo fruit. The gas sampler collects the micro-damage of the central gas inside the pomelo fruit through the air outlet core, directly obtains the gas volatiles in the central gas collecting space inside the pomelo fruit, and can replenish clean gas through the air replenishing core, thereby realizing micro-damage sampling for detecting the internal quality characteristics of pomelo fruit.

[0035] The method for detecting the internal quality characteristics of pomelo fruit with micro-damage of the present invention adopts the sampling device for detecting the internal quality characteristics of pomelo fruit with micro-damage of the present invention to sample the central gas inside the pomelo fruit, and collects the central gas inside the pomelo fruit without damaging the pomelo fruit, thereby accurately obtaining the quality characteristic information of the pomelo fruit, and then accurately judging the quality of the pomelo fruit through an external analysis instrument, thereby realizing non-destructive and accurate detection of the internal quality characteristics of the pomelo fruit, ensuring the quality of the pomelo fruit entering the market, improving the brand awareness of the pomelo fruit, and ultimately not only allowing consumers to buy with confidence, but also allowing consumers to eat with peace of mind. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of the micro-damage type pomelo fruit internal quality characteristic detection sampling device of the present invention in a specific embodiment;

[0037] Figure 2 It is a schematic diagram of the local structure of the sampling needle;

[0038] Figure 3 It is a flow chart of the method for detecting the internal quality characteristics of pomelo fruit with slight damage according to a specific embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the micro-damage detection of pomelo fruit in a specific embodiment;

[0040] Figure markings: 100-sampling device, 1-sampling needle, 101-needle body, 1011-air supply port, 1012-air inlet, 1013-air supply cover, 1014-air outlet cover, 102-needle handle, 103-air supply core, 104-air outlet core, 105-needle cap, 2-gas sampler, 3-filter, 4-electromagnetic pole controller, 401-first coil, 402-second coil, 5-external sampling air pipe, 6-external air supply pipe, 7-touch screen controller, 8-pomelo fruit, 801-pomelo peel, 802-pomelo flesh, 803-gas collecting space. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments, but the protection scope and implementation mode of the present invention are not limited thereto. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "front", "rear", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only used to distinguish the descriptions and are only for the convenience and simplification of the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention, let alone indications or implied relative importance.

[0043] The micro-damage type grapefruit internal quality characteristics detection sampling device of the present invention, see Figure 1 As shown, it includes a sampling needle 1, an air collector 2 and a filter 3. The sampling needle 1 is a main sampling component that can be inserted into the pomelo fruit, while the air collector 2 and the filter 3 are both external auxiliary sampling components.

[0044] The sampling needle 1 is composed of a needle body 101 and a needle cap 105, and the needle cap 105 is connected to the front end of the needle body 101. Optionally, the needle cap 105 of the sampling needle 1 is a needle cap with a pointed tip at the front end, which helps to reduce the resistance of inserting into the pomelo fruit.

[0045] See also Figure 1 and Figure 2 As shown, the sampling needle 1 is provided with an air supply core 103 and an air outlet core 104, and the air supply core 103 and the air outlet core 104 are independent core channels, and air can flow freely inside. In addition, the sampling needle 1 is also provided with an air supply port 1011 and an air inlet 1012, both of which can be opened and closed. The air supply port 1011 is connected to the air supply core 103, and the air inlet 1012 is connected to the air outlet core 104; and the air supply port 1011 and the air inlet 1012 are both located at the front end of the sampling needle 1.

[0046] When sampling the gas inside the pomelo fruit, the gas inside the pomelo fruit can flow into the gas outlet core 104 from the air inlet 1012, and then be collected by the gas collecting device through the gas outlet core 104; and the supplementary gas in the gas replenishing core 103 can flow out from the gas replenishing port 1011 to the inside of the pomelo fruit, so that the air pressure inside the pomelo fruit remains balanced, thereby ensuring the smooth sampling of the gas inside the pomelo fruit.

[0047] Furthermore, in order to prevent the gas replenished by the gas replenishment port 1011 from flowing directly into the gas inlet 1012, the gas replenishment port 1011 and the gas inlet 1012 are arranged to be far away from each other, so as to ensure the purity of the sampled gas and guarantee the detection accuracy. In a preferred embodiment, the gas replenishment core 103 and the gas outlet core 104 are arranged on the left and right sides of the sampling needle 1, and the gas inlet 1012 is closer to the front end of the sampling needle 1 relative to the gas replenishment port 1011, so as to minimize the interference of the gas inlet 1012 on the working of the gas replenishment port 1011.

[0048] See also Figure 1 As shown, the gas collector 2 is connected to the gas outlet core 104 , and the filter 3 is connected to the gas supply core 103 .

[0049] Specifically, the gas collector 2 is connected to the gas outlet end of the gas outlet core 104, and the gas inside the pomelo fruit flows into the gas outlet core 104 from the gas inlet 1012, and then flows through the gas outlet core 104 to the gas collector 2 to be collected. Optionally, the gas outlet end of the gas outlet core 104 is connected to the gas collector 2 through an external sampling air pipe 5, so that the gas collector 2 can be set externally.

[0050] In an optional embodiment, the gas collector 2 includes an electronic nose, a manual disposable extraction tube or a micro electric vacuum pump. The electronic nose can effectively identify the aromatic component content, maturity, storage time, sugar content, diseases, etc. of the fruit, thereby more effectively improving the detection accuracy.

[0051] The filter 3 is connected to the air inlet end of the air replenishing core 103, the outlet end of the filter 3 is connected to the air inlet end of the air replenishing core 103, and the inlet end of the filter 3 is connected to the supplementary gas device, which can filter the supplementary gas entering the air replenishing core 103 to ensure that the supplementary gas entering the pomelo fruit is clean. In an optional embodiment, the filter 3 is an activated carbon filter filled with activated carbon, which can adsorb and filter impurities in the supplementary gas.

[0052] Furthermore, the rear end of the air-supplementing core 103 is connected to the filter 3 through the external air-supplementing pipe 6, so that the filter 3 can be externally arranged.

[0053] Also, see Figure 1 As shown, an electromagnet type magnetic pole controller 4 is provided at the rear end of the sampling needle 1. The electromagnet type magnetic pole controller 4 can make the air supply core 103 and the air outlet core 104 generate magnetic pole magnetism, and realize magnetic control opening and closing of the air supply port 1011 and the air inlet 1012.

[0054] Specifically, the air supply port 1011 is provided with an air supply cover 1013 that can be opened and closed by magnetic control, and the air inlet 1012 is provided with an air outlet cover 1014 that can be opened and closed by magnetic control. Moreover, the materials of the air supply cover 1013 and the air outlet cover 1014 are both fused with magnetic materials with magnetic poles, and the air supply cover 1013 and the air outlet cover 1014 are both magnetic with magnetic poles.

[0055] In this way, during the working process, when the sampling needle 1 is inserted into the inside of the pomelo fruit to collect gas, the electromagnetic magnetic pole controller 4 works and turns on the current, so that the gas replenishing core 103 generates the same magnetic pole magnetism as the gas replenishing cover 1013, and the gas outlet core 104 generates the same magnetic pole magnetism as the gas outlet cover 1014, so that the gas replenishing cover 1013 and the gas replenishing port end of the gas replenishing core 103 are magnetically repelled and opened, and the gas outlet cover 1014 and the gas inlet end of the gas outlet core 104 are magnetically repelled and opened, and gas sampling can be carried out. Collection work; when the gas collection work is completed, the electromagnet type magnetic pole controller 4 works and switches the current, so that the gas replenishing core 103 generates a magnetic pole magnetism different from the gas replenishing cover 1013, and the gas outlet core 104 generates a magnetic pole magnetism different from the gas outlet cover 1014, so that the gas replenishing cover 1013 and the gas replenishing port end of the gas replenishing core 103 are magnetically different and attracted to close, and the gas outlet cover 1014 and the gas inlet end of the gas outlet core 104 are magnetically different and attracted to close, and the gas collection work is completed, and the sampling needle 1 can be pulled out.

[0056] In a preferred embodiment, please refer to Figure 1 As shown, the electromagnet type magnetic pole controller 4 includes a positive and negative current converter (not shown), a first coil 401 and a second coil 402. The first coil 401 is sleeved on the rear end of the gas outlet core 104, and the second coil 402 is sleeved on the rear end of the gas replenishing core 103; the first coil 401 and the second coil 402 are both connected to the positive and negative current converter. When working, after the first coil 401 and the second coil 402 are connected to the current, the gas outlet core 104 and the gas replenishing core 103 respectively wound by the first coil 401 and the second coil 402 can generate magnetic pole magnetism in the form of an electromagnet; and the positive and negative current converter can switch the positive and negative currents flowing to the first coil 401 and the second coil 402, so that the magnetic pole magnetism of the gas outlet 104 and the gas replenishing core 103 respectively wound by the first coil 401 and the second coil 402 can be converted.

[0057] In an optional embodiment, the material of the air supply cover 1013 incorporates a material with an S-pole magnetism, so that the air supply cover 1013 has an S-pole magnetism; the material of the air outlet cover 1014 incorporates a material with an S-pole magnetism, so that the air outlet cover 1014 has an S-pole magnetism. During the working process, when the sampling needle 1 is inserted into the inside of the pomelo fruit to collect gas, the electromagnetic magnetic pole controller 4 works, and the electromagnetic magnetic pole controller 4 is connected to the current, so that the gas replenishing core 103 generates S-pole magnetism, and the gas outlet core 104 generates S-pole magnetism, and the gas replenishing cover 1013 and the gas replenishing port end of the gas replenishing core 103 are magnetically repelled and opened, and the gas outlet cover 1014 and the gas inlet end of the gas outlet core 104 are magnetically repelled and opened; when the gas collection work is completed, the positive and negative current converter in the electromagnetic magnetic pole controller 4 works, switches the current, so that the gas replenishing core 103 generates N-pole magnetism, and the gas outlet core 104 generates N-pole magnetism, and the gas replenishing cover 1013 and the gas replenishing port end of the gas replenishing core 103 are magnetically different and attracted to close, and the gas outlet cover 1014 and the gas inlet end of the gas outlet core 104 are magnetically different and attracted to close.

[0058] In addition, please see Figure 1 As shown, a needle handle 102 is provided at the rear end of the sampling needle 1 , and the sampling needle 1 can be subjected to force through the needle handle 102 during the process of inserting into and removing from the pomelo fruit, thereby assisting the insertion and removal of the sampling needle 1 .

[0059] In another preferred embodiment, the electromagnetic magnetic pole controller 4 is arranged inside the needle handle 102 to protect and support the arrangement of the electromagnetic magnetic pole controller 4. Furthermore, a touch screen controller 7 is arranged on the needle handle 102, and the touch screen controller 7 is specifically embedded in the needle handle 102. The touch screen controller 7 is connected to the electromagnetic magnetic pole controller 4, and can realize online operation of the electromagnetic magnetic pole controller 4. The control interface of the touch screen controller 7 displays the magnetic pole state of the gas replenishment port end of the gas replenishment core 103 and the gas inlet end of the gas outlet core 104 in real time, so that the operator can intuitively understand the opening and closing states of the gas replenishment port 1011 and the gas inlet 1012 in real time.

[0060] Example 1

[0061] The method for detecting the internal quality characteristics of pomelo fruit by micro-injury of the present invention adopts the above-mentioned sampling device 100 for detecting the internal quality characteristics of pomelo fruit by micro-injury to perform sampling detection. Figure 3 As shown, the following steps are included:

[0062] (1) Insert the sampling needle into the external pipeline cleaner and start the gas sampler for 10 seconds to purify the gas supply core and gas outlet core pipelines of the sampling needle to ensure the uniqueness of the sampled gas.

[0063] (2) Insert the needle body and needle cap of the sampling needle into a sponge soaked in alcohol to disinfect the sampling needle with alcohol; then insert the needle into clean water to wash away the residual alcohol on the surface of the sampling needle, and wipe the sampling needle dry with absorbent paper.

[0064] (3) The needle body and needle cap of the sampling needle are inserted into the inner center from the bottom of the pomelo fruit.

[0065] (4) Collecting volatile gases from the inner center of grapefruit

[0066] (4-1) starting the gas collector to start working; when the gas collector is an electronic nose, first starting the electronic nose to preheat;

[0067] (4-2) The electromagnetic magnetic pole controller passes a positive current to the first coil through a positive and negative current converter, so that the air inlet end of the air outlet core has an S-pole magnetism, pushing the air outlet cover with the S-pole magnetism to open outwards;

[0068] Then the electromagnetic pole controller passes a positive current to the second coil through the positive and negative current converter, so that the air supply port end of the air supply core has S-pole magnetism, pushing the air supply cover with S-pole magnetism to open outwards;

[0069] (4-3) The gas collector starts to collect gas from the center of the pomelo fruit. The volatile gas from the center of the pomelo fruit enters the gas outlet core through the gas inlet, then enters the external sampling gas pipe, and finally enters the gas collector;

[0070] At this time, the gas volume in the center of the pomelo fruit decreases, so that the internal air pressure is lower than the external air pressure. The external gas passes through the filter to transport the purified clean air, enters the air supply core through the external air supply pipe, and then enters the center of the pomelo fruit through the air supply port, thereby keeping the internal air pressure of the pomelo fruit balanced when collecting gas.

[0071] (5) After the gas collector has finished collecting gas, the electromagnetic pole controller passes a negative current to the first coil through the positive and negative current converter, so that the air inlet end of the gas outlet core has N-pole magnetism, attracting the gas outlet cover with S-pole magnetism to close inward;

[0072] Then the electromagnetic pole controller passes a negative current to the second coil through a positive and negative current converter, so that the air outlet end of the air supply core has N-pole magnetism, attracting the air supply cover with S-pole magnetism to close inward.

[0073] (6) Pull out the sampling needle from the bottom of the pomelo fruit to complete the pomelo fruit sample collection.

[0074] (7) Analyze and evaluate the internal quality of the pomelo fruit based on the collected central gas inside the pomelo fruit.

[0075] When the gas collector is an electronic nose, the inspector finally selects the gas extracted from the pomelo fruit by the gas collector and combines it with the pre-set pulp quality recognition model to obtain the pulp quality micro-damage assessment result;

[0076] Alternatively, when the gas sampler uses a manual disposable extraction tube or a micro electric vacuum pump, after collecting a certain amount of gas, the sample gas is collected and brought back to the laboratory for analysis.

[0077] (8) Test the next sample and repeat the above steps (1), (2), (3), (4), (5), (6), and (7).

[0078] When sampling for the internal quality characteristics of pomelo fruit 8, the oil cell layer of the pomelo peel 801 is extremely thin, and the sponge layer is thicker but loose in structure, which is the natural protective shell of the pulp 802. The pulp is gathered in a petal shape, so that the pomelo fruit forms a hollow center. And because the pomelo pulp's cyst skin is relatively thin, the hollow center of the pomelo fruit forms a natural gas collection space 803 with the smell characteristics of the pomelo pulp. Figure 4 As shown, the tiny sampling needle 1 is used to pass through the peel from the bottom of the pomelo fruit to cause micro-damage, which will not affect the quality of the pomelo fruit, but can directly reach the space in the center of the flesh. The gas outlet core 104 on the sampling needle 1 is used to collect gas, and the gas volatiles in the gas collection space in the center of the pomelo fruit can be directly obtained, and then the quality of the pomelo fruit can be accurately judged through an external analysis instrument, so that the quality characteristic information of the pomelo fruit can be accurately obtained.

[0079] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, this specification does not describe all possible combinations of the technical features in the above-described embodiments. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Moreover, the above-described embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention.

[0080] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A micro-damage sampling device for detecting the internal quality characteristics of pomelo fruit, It is characterized in that include A sampling needle, wherein the sampling needle is provided with an air supply core and an air outlet core; the sampling needle is also provided with an air supply port and an air inlet which can be opened and closed, the air supply port is connected with the air supply core, and the air inlet is connected with the air outlet core; and the air supply port and the air inlet are both located at the front end of the sampling needle, the air supply core and the air outlet core are independent core channels and air can be allowed to flow freely inside; An air collector, the air collector is connected to the air outlet core; A filter, the filter being in communication with the air replenishing core; The air supply core and the air outlet core are respectively arranged on the left and right sides of the sampling needle, and the air inlet is closer to the front end of the sampling needle relative to the air supply port; When testing the internal quality characteristics of pomelo fruit, the sampling needle can penetrate the peel from the bottom of the pomelo fruit with slight damage and penetrate into the center of the pomelo fruit for testing.

2. A micro-damage type grapefruit internal quality characteristics detection sampling device according to claim 1, It is characterized in that The rear end of the sampling needle is provided with an electromagnet type magnetic pole controller, which can make the air supply core and the air outlet core generate magnetism; the air supply port is provided with an air supply cover that can be opened and closed by magnetic control, and the air inlet is provided with an air outlet cover that can be opened and closed by magnetic control.

3. A micro-damage type grapefruit internal quality characteristics detection sampling device according to claim 2, It is characterized in that The electromagnetic pole controller comprises a positive and negative current converter, a first coil and a second coil; The first coil is sleeved on the rear end of the air outlet core, and the second coil is sleeved on the rear end of the air replenishing core; the first coil and the second coil are both connected to the positive and negative current converter.

4. A micro-damage type sampling device for detecting internal quality characteristics of pomelo fruit according to claim 2, It is characterized in that The materials of the air supply cover and the air outlet cover are both fused with magnetic materials, and the air supply cover and the air outlet cover are both inherently magnetic.

5. A micro-damage type grapefruit internal quality characteristic detection sampling device according to any one of claims 2 to 4, It is characterized in that The rear end of the sampling needle is provided with a needle handle; the electromagnet type magnetic pole controller is arranged in the needle handle.

6. A micro-damage type sampling device for detecting internal quality characteristics of pomelo fruit according to claim 5, It is characterized in that A touch screen controller is arranged on the needle handle; the touch screen controller is connected to the electromagnet type magnetic pole controller.

7. A micro-damage type sampling device for detecting internal quality characteristics of pomelo fruit according to claim 1, It is characterized in that The rear end of the gas outlet core is communicated with the gas sampler through an external sampling gas pipe, and the rear end of the gas supply core is communicated with the filter through an external gas supply pipe.

8. The micro-damage type sampling device for detecting the internal quality characteristics of pomelo fruit according to claim 1, It is characterized in that The front end of the sampling needle is provided with a needle cap with a pointed tip.

9. A method for detecting the internal quality characteristics of pomelo fruit with minimal damage, It is characterized in that The method of using the micro-damage type pomelo fruit internal quality characteristic detection sampling device according to any one of claims 1 to 8 to perform sampling detection comprises the following steps: (1) Purifying the air supply core and air outlet core pipeline of the sampling needle; (2) Disinfect the sampling needle with alcohol, wash away the residual alcohol on the surface of the sampling needle with clean water, and wipe the sampling needle dry with absorbent paper; (3) The sampling needle is inserted into the inner center from the bottom of the pomelo fruit, and the gas collector is started; (4) opening the air inlet of the air outlet core; (5) opening the air supply port of the air supply core; (6) The gas collector starts to collect gas from the inner center of the pomelo fruit for analysis; (7) After the gas collection is completed, the gas inlet of the gas outlet core and the gas supply port of the gas supply core are closed; (8) Pulling out the sampling needle from the bottom of the pomelo fruit to end the gas sampling at the center of the pomelo fruit; (9) Analyze and evaluate the internal quality of the pomelo fruit based on the collected central gas inside the pomelo fruit.

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