Durian maturity detection device and detection method

Abstract

The invention provides a durian maturity detection device and method, the durian maturity detection device comprises a detection box and a control display device, a durian tray is arranged in the detection box, a fresh air outlet pipe is communicated with a sulfide detection device along the air outlet direction, and the sulfide detection device is in signal connection with the control display device; the system further comprises an image acquisition device, the image acquisition device is in signal connection with a control display device, and the control display device is in signal connection with an external detector. The method comprises the following steps: S1, appearance detection and weight detection; s2, detecting the content of volatile sulfides; s3, comprehensively judging the maturity of the durian measured at present according to the data measured in S1 and S2; the durian maturity detection method has the beneficial effects that the durian maturity is comprehensively detected through two aspects of images and volatile substances, accurate judgment of the durian maturity is beneficial to accurate classification of a large batch of durians, accurate sales priorities are provided, and the situation of insufficient consumption caused by the maturity problem of fruits is reduced.

Description

Technical Field

[0001] The invention relates to a durian maturity detection device and a detection method, belonging to the technical field of plant fruit detection. Background Art

[0002] Durian is a common tree fruit that grows in tropical regions. It has a hard appearance and thorns. The flesh is rich in various nutrients and has a unique smell. Therefore, it is very popular among the public. Due to the limitations of its growing environment, durian trees are only planted in a few areas in my country. Most durian relies on imports to meet domestic market demand, so the price of durian has always been relatively high.

[0003] It takes a long time for durian to grow to maturity. Once ripe, it will fall from the tree in a very short time, the flesh will be damaged, and it can no longer be sold. In addition, fully ripe durian has poor storage resistance and needs to be eaten as soon as possible, which is extremely disadvantageous for fruit farmers and merchants. Therefore, in the actual picking and selling process, most durians are picked when they are not fully ripe or in an immature state. During the transportation or storage process, they are ripened by ethylene and sold in a mature state when they arrive at the market. However, in actual application, it is often the case that the durian fruits purchased by consumers are not ripe or fully ripe, and the price of durian is high, which is extremely disadvantageous for consumers. Therefore, before selling on the market, the maturity state of durian fruits needs to be accurately analyzed and classified to ensure that the durian is in a fully mature state when sold. Immature and incompletely ripe durian can be further ripened before being sold to meet the common interests of both sellers and consumers and improve durian market satisfaction. Summary of the invention

[0004] Purpose of the invention: In view of the deficiencies in the prior art, the present invention provides a durian maturity detection device and detection method to solve the problems mentioned in the above background technology.

[0005] Technical solution: A durian maturity detection device, comprising a detection box with a switchable closed door and a control display device, wherein a grid-shaped durian tray is arranged in the detection box, a fresh air inlet pipe connected to the detection box body is opened at the lower side of the detection box, and a fresh air outlet pipe connected to the detection box body is opened at the upper side, exhaust fans are arranged at the connection between the fresh air inlet pipe and the fresh air outlet pipe and the detection box, the fresh air outlet pipe is connected to a sulfide detection device along the air outlet direction, the sulfide detection device is arranged above the detection box, and is connected to the control display device signal; It also includes an image acquisition device installed inside the detection box, the image acquisition device is connected to the control display device signal, and the control display device is connected to the external detection instrument signal.

[0006] The present invention arranges image acquisition and sulfide detection devices to comprehensively detect the maturity of durian through images and volatile substances. Compared with traditional manual visual experience detection and odor detection, which may cause serious misjudgment according to individual differences and lead to misjudgment of sellers and buyers, accurate judgment of the maturity of durian is conducive to the accurate classification of large batches of durian, provides accurate sales priority, ensures that durian fruits are sold in a suitable state, ensures the overall sales satisfaction of the durian market, and reduces consumer dissatisfaction caused by the maturity of the fruit.

[0007] A spoiler is provided on the side wall of the inner side of the detection box close to the fresh air intake pipe. The spoiler extends obliquely above the durian tray, and the extension distance is less than the distance between the side wall of the detection box and the edge of the durian tray.

[0008] By setting a spoiler, the gas sucked in by the fresh air inlet pipe is fully mixed into the detection box, and exhausted through the fresh air outlet pipe, the sulfide volatilized by the durian in the detection room is mixed with the fresh air, so that the sulfide in the detection box can be mixed with the fresh air and then sent to the sulfide detection device.

[0009] The sulfide detection device comprises an air chamber connected to the fresh air outlet pipe and a solvent supply device arranged on one side of the air chamber, and a sampling card slot is provided on the upper side of the solvent supply device; The solvent supply device includes a group of symmetrically arranged solvent tanks, an electromagnetic switch valve arranged at the outlet of the solvent tank, and a solvent cotton pad arranged on the other side of the electromagnetic switch valve. The solvent cotton pads on both sides are in contact, and the contact position corresponds to the sampling card slot.

[0010] Since the smell emitted by durian is volatile sulfide, it is colorless when mixed in the air in gaseous state, but light yellow in solvent. Therefore, setting a corresponding solvent to capture the sulfide volatilized by durian in the mixed air can realize the detection of the sulfide content volatilized by the durian sample.

[0011] The sampling card slot is slidably arranged on the upper side of the detection box, and a self-resetting air isolation plate is arranged at the notch of the sampling card slot.

[0012] In order to reduce the measurement error caused by gas leakage, a gas baffle can be set to reduce the leakage during detection. If the solvent is a volatile or harmful substance, the gas baffle can simultaneously control the volatilization amount of the solvent and reduce the possibility of leakage.

[0013] The other end of the gas chamber is connected to the gas processing device, which includes an activated carbon adsorption compartment and a potassium permanganate oxidation compartment that are connected. The activated carbon adsorption compartment and the potassium permanganate oxidation compartment are separated by a grid plate. An exhaust pipe connected to an exhaust system is provided on one side of the gas processing device close to the potassium permanganate oxidation compartment.

[0014] In order to reduce the impact of partial volatilization of the solvent in the gas, the excess gas is filtered and harmlessly treated by a gas treatment device before being discharged.

[0015] A refrigerator and a temperature sensor are arranged in the air chamber, and both the refrigerator and the temperature sensor are connected to the control display device signal.

[0016] In order to control the physical state of the solvent, the temperature is controlled by a refrigerator to be below the vaporization temperature of the solvent currently in use to ensure that the solvent can remain in a liquid state.

[0017] A weighing device is arranged at the bottom of the durian tray, and the weighing device is connected with a display control device signal.

[0018] The weight of the durian can be recorded simultaneously by the weighing device, so that different judgment logics can be used for durians of different sizes in the subsequent judgment process.

[0019] A detection method of a durian maturity detection device comprises the following steps: S1. Appearance inspection and weight inspection; Place the durian to be tested on the durian tray, close the closed door, operate the display control device, collect images of the durian through the image acquisition device, and collect weight data through the weighing device; The collected image data is fed back to an external detector for spectral analysis to obtain the surface color data of the current durian being tested and marked with a serial number; S2, volatile sulfide content detection; When the image acquisition is started, the exhaust fans at the fresh air inlet duct and the fresh air outlet duct start working to promote the air flow in the detection box. After 10 seconds, the electromagnetic switch valve opens, and the solvent leaks out from the solvent tank and adheres to the solvent cotton pad. The sampling card is inserted, and the sampling card first passes through the solvent cotton pads, carrying the solvent on the surface of the sampling card. The sampling card is moved into the air chamber, and the volatile sulfide emitted by the fully mixed durian contacts the sampling card and dissolves in the solvent attached to the sampling card. After 10 seconds, the sampling card is taken out, and the self-resetting air baffle blocks the sampling card slot. Send the sampling card to the liquid chromatograph for chromatographic analysis to obtain sample chromatographic data, which are marked with the same serial number as the image acquisition data; S3, comprehensively judging the maturity of the currently measured durian according to the data measured by S1 and S2; Different intervals of spectral data thresholds are set according to different durian varieties. The spectral values ​​of immature and fully mature surface colors are taken as the judgment threshold intervals. The middle value is the spectral mean. If it is lower than the mean, it is judged as immature. The display control device feedbacks the maturity of the current sample number as "immature"; if it is higher than the mean, it is judged in combination with the chromatographic data obtained by chromatographic analysis; The chromatographic values ​​of the sulfide solutions volatilized by immature and fully mature durian were taken as the judgment threshold interval, and the middle value was taken as the chromatographic mean; When the weight of the durian in S1 is greater than or equal to 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is less than the chromatographic mean value, it is judged to be not fully mature, and the display control device feedbacks the maturity of the current sample number as "not fully mature"; When the weight of the durian in S1 is greater than or equal to 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is greater than the chromatographic mean value, it is determined to be fully mature, and the display control device feedbacks the maturity of the current sample number as "fully mature"; When the weight of the durian in S1 is less than 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is lower than the minimum chromatographic value + (maximum chromatographic value - minimum chromatographic value) 40%, it is judged to be not fully mature, and the display control device feedbacks the maturity of the current sample number as "not fully mature"; When the weight of the durian in S1 is less than 1.5KG, the obtained spectral value is greater than the mean, and the chromatographic analysis data is greater than the minimum chromatographic value + (maximum chromatographic value - minimum chromatographic value) 40%, it is judged to be fully mature, and the display control device feedbacks the maturity of the current sample serial number as "fully mature".

[0020] Beneficial effect: The present invention sets up image acquisition and sulfide detection devices to comprehensively detect the maturity of durian through images and volatile substances. Compared with traditional manual visual experience detection and odor detection, which may cause serious misjudgment according to individual differences and lead to misjudgment of sellers and buyers, accurate judgment of the maturity of durian is conducive to the accurate classification of large batches of durian, provides accurate sales priority, ensures that durian fruits are sold in a suitable state, ensures the overall sales satisfaction of the durian market, and reduces consumer dissatisfaction caused by fruit maturity issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structural layout of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of the sulfide detection device of the present invention.

[0024] Figure 3 It is a schematic diagram of the sampling card slot structure of the sulfide detection device of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] like Figures 1 to 3 As shown, a durian maturity detection device comprises a detection box 1 provided with a switchable closed door 12 and a control display device 7, a grid-shaped durian tray 2 is arranged in the detection box 1, a fresh air inlet pipe 3 connected to the detection box 1 body is opened at the lower side of the detection box 1, and a fresh air outlet pipe 4 connected to the detection box 1 body is opened at the upper side, and exhaust fans 5 are arranged at the connection between the fresh air inlet pipe 3 and the fresh air outlet pipe 4 and the detection box 1, and the fresh air outlet pipe 4 is connected to the sulfide detection device 6 along the air outlet direction, and the sulfide detection device 6 is arranged above the detection box 1, and is connected to the control display device 7 signal; It also includes an image acquisition device 8 installed inside the detection box 1, and the image acquisition device 8 is connected to the control display device 7 by signal, and the control display device 7 is connected to the external detection instrument by signal.

[0029] The present invention provides an image acquisition device 8 and a sulfide detection device 6 to comprehensively detect the maturity of durian through images and volatile substances. Compared with traditional manual visual experience detection and odor detection, which may cause serious misjudgment due to individual differences and lead to misjudgment of sellers and buyers, accurate judgment of the maturity of durian is conducive to the accurate classification of large batches of durian, provides accurate sales priority, ensures that durian fruits are sold in a suitable state, ensures the overall sales satisfaction of the durian market, and reduces consumer dissatisfaction caused by the maturity of the fruit.

[0030] A spoiler 11 is provided on the side wall of the inner side of the detection box 1 near the fresh air intake pipe 3. The spoiler 11 extends obliquely above the durian tray 2, and the extension distance is less than the distance between the side wall of the detection box 1 and the edge of the durian tray 2.

[0031] By setting the spoiler 11, the gas sucked into the fresh air inlet pipe 3 is fully mixed into the detection box, and exhausted through the fresh air outlet pipe 4, so that the sulfide volatilized from the durian in the detection box 1 is mixed with the fresh air, so that the sulfide in the detection box 1 can be mixed with the fresh air and then sent to the sulfide detection device.

[0032] The sulfide detection device 6 includes an air chamber 61 connected to the fresh air outlet pipe 4 and a solvent supply device arranged on one side of the air chamber 61, and a sampling card slot 62 is opened on the upper side of the solvent supply device; The solvent supply device includes a group of symmetrically arranged solvent tanks 63, an electromagnetic switch valve 64 arranged at the outlet of the solvent tank 63, and a solvent cotton pad 65 arranged on the other side of the electromagnetic switch valve 64. The solvent cotton pads 65 on both sides are in contact, and the contact position corresponds to the sampling card slot 62.

[0033] Since the smell emitted by durian is volatile sulfide, it is colorless when mixed in the air in gaseous state, but light yellow in the solvent. Therefore, setting a corresponding solvent to capture the sulfide volatilized by durian in the mixed air can realize the detection of the sulfide content volatilized by the durian sample. In this application, ether solution is selected as the solvent, and the sulfides detected are diallyl disulfide and diallyl trisulfide.

[0034] The sampling card slot 62 is slidably arranged on the upper side of the detection box 1 , and a self-resetting air isolation plate 66 is arranged at the notch of the sampling card slot 62 .

[0035] In order to reduce the measurement error caused by gas leakage, the leakage amount can be reduced during detection by setting the gas isolation plate 66. If the solvent is a volatile substance or a harmful substance, the gas isolation plate 66 can simultaneously control the volatilization amount of the solvent and reduce the possibility of leakage.

[0036] The other end of the gas chamber 61 is connected to the gas processing device, which includes an activated carbon adsorption compartment 9 and a potassium permanganate oxidation compartment 10 that are connected. The activated carbon adsorption compartment 9 and the potassium permanganate oxidation compartment 10 are separated by a grid plate. An exhaust pipe connected to an exhaust system is provided on the side of the gas processing device close to the potassium permanganate oxidation compartment 10.

[0037] In order to reduce the impact of partial volatilization of the solvent in the gas, the excess gas is filtered and harmlessly treated by a gas treatment device before being discharged.

[0038] A refrigerator 67 and a temperature sensor 68 are disposed in the air chamber 61 , and both the refrigerator 67 and the temperature sensor 68 are connected to the control and display device 7 via signals.

[0039] In order to control the physical state of the solvent, the temperature is controlled below the vaporization temperature of the currently used solvent by the refrigerator 67 to ensure that the solvent can remain in a liquid state. In this application, the temperature is controlled below 20 degrees to ensure that the ether solution remains in a liquid state and reduce the amount of volatilization.

[0040] A weighing device 13 is disposed at the bottom of the durian tray 2 , and the weighing device 13 is connected to the control and display device 7 by signal.

[0041] The weight of the durian can be recorded simultaneously by the weighing device 13, so that different judgment logics can be used for durians of different sizes in the subsequent judgment process.

[0042] A detection method of a durian maturity detection device, characterized in that it comprises the following steps: S1. Appearance inspection and weight inspection; Place the durian to be tested on the durian tray 2, close the closed door 12, operate the display control device, collect images of the durian through the image acquisition device 8, and collect weight data through the weighing device; The collected image data is fed back to an external detector for spectral analysis to obtain the surface color data of the current durian being tested and marked with a serial number; S2, volatile sulfide content detection; When the image acquisition is started, the exhaust fans 5 at the fresh air inlet pipes 3 and the fresh air outlet pipes 4 start working to promote the air flow in the detection box 1. After 10 seconds, the electromagnetic switch valve 64 is opened, and the solvent leaks out from the solvent tank and adheres to the solvent cotton pad 65. The sampling card is inserted, and the sampling card first passes through the solvent cotton pads 65, carrying the solvent on the surface of the sampling card, and the sampling card is moved into the air chamber 61. The volatile sulfide emitted by the durian after full mixing contacts with the sampling card and dissolves in the solvent attached to the sampling card. After 10 seconds, the sampling card is taken out, and the self-resetting air baffle 66 blocks the sampling card slot 62. Send the sampling card to the liquid chromatograph for chromatographic analysis to obtain sample chromatographic data, which are marked with the same serial number as the image acquisition data; S3, comprehensively judging the maturity of the currently measured durian according to the data measured by S1 and S2; Different intervals of spectral data thresholds are set according to different durian varieties. The spectral values ​​of immature and fully mature surface colors are taken as the judgment threshold intervals. The middle value is the spectral mean. If it is lower than the mean, it is judged as immature. The display control device feedbacks the maturity of the current sample number as "immature"; if it is higher than the mean, it is judged in combination with the chromatographic data obtained by chromatographic analysis; The chromatographic values ​​of the sulfide solutions volatilized by immature and fully mature durian were taken as the judgment threshold interval, and the middle value was taken as the chromatographic mean; When the weight of the durian in S1 is greater than or equal to 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is less than the chromatographic mean value, it is judged to be not fully mature, and the display control device feedbacks the maturity of the current sample number as "not fully mature"; When the weight of the durian in S1 is greater than or equal to 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is greater than the chromatographic mean value, it is determined to be fully mature, and the display control device feedbacks the maturity of the current sample number as "fully mature"; When the weight of the durian in S1 is less than 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is lower than 40% of the minimum chromatographic value + the maximum chromatographic value - the minimum chromatographic value, it is judged to be not fully mature, and the display control device feedbacks the maturity of the current sample number as "not fully mature"; When the weight of the durian in S1 is less than 1.5KG, the obtained spectral value is greater than the mean, and the chromatographic analysis data is greater than 40% of the minimum chromatographic value + maximum chromatographic value - minimum chromatographic value, it is judged to be fully mature, and the display control device feedbacks the maturity of the current sample serial number as "fully mature".

[0043] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A durian maturity detection device, characterized in that: The invention comprises a detection box (1) provided with a switchable closed door (12) and a control display device (7), wherein a grid-shaped durian tray (2) is provided in the detection box (1), a fresh air inlet pipe (3) connected to the detection box (1) body is provided on the lower side of the detection box (1), and a fresh air outlet pipe (4) connected to the detection box (1) body is provided on the upper side, an exhaust fan (5) is provided at the connection between the fresh air inlet pipe (3) and the fresh air outlet pipe (4) and the detection box (1), and the fresh air outlet pipe (4) is connected to a sulfide detection device (6) along the air outlet direction, and the sulfide detection device (6) is provided above the detection box (1) and is signal-connected to the control display device (7); It also includes an image acquisition device (8) installed inside the detection box (1), wherein the image acquisition device (8) is connected to the control display device (7) by signal, and the control display device (7) is connected to the external detection instrument by signal.

2. Durian maturity detection device according to claim 1, characterized in that: A spoiler (11) is provided on the side wall of the inner side of the detection box (1) close to the fresh air intake pipe (3); the spoiler (11) extends obliquely above the durian tray (2), and the extension distance is less than the distance between the side wall of the detection box (1) and the edge of the durian tray (2).

3. Durian maturity detection device according to claim 1, characterized in that: The sulfide detection device (6) comprises an air chamber (61) connected to the fresh air outlet pipe (4) and a solvent supply device arranged on one side of the air chamber (61), wherein a sampling card slot (62) is provided on the upper side of the solvent supply device; The solvent supply device comprises a group of symmetrically arranged solvent tank bodies (63), an electromagnetic switch valve (64) arranged at the outlet of the solvent tank body (63), and a solvent cotton pad (65) arranged on the other side of the electromagnetic switch valve (64), the solvent cotton pads (65) on both sides are in contact, and the contact position corresponds to the sampling card slot (62).

4. The durian maturity detection device according to claim 4, wherein: The sampling card slot (62) is slidably arranged on the upper side of the detection box (1), and a self-resetting air isolation plate (66) is arranged at the notch of the sampling card slot (62).

5. The durian maturity detection device according to claim 4, characterized in that: The other end of the gas chamber (61) is connected to a gas processing device, and the gas processing device comprises an activated carbon adsorption compartment (9) and a potassium permanganate oxidation compartment (10) that are connected to each other. The activated carbon adsorption compartment (9) and the potassium permanganate oxidation compartment (10) are separated by a grid plate. An exhaust pipe connected to an exhaust system is provided on a side of the gas processing device close to the potassium permanganate oxidation compartment (10).

6. The durian maturity detection device according to claim 4, characterized in that: A refrigerator (67) and a temperature sensor (68) are arranged in the air chamber (61), and both the refrigerator (67) and the temperature sensor (68) are connected to the control display device (7) by signal.

7. The durian maturity detection device according to claim 1, characterized in that: A weighing device (13) is arranged at the bottom of the durian tray (2), and the weighing device (13) is connected to the control display device (7) by signal.

8. A detection method according to the durian maturity detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Appearance inspection and weight inspection; Placing the durian to be tested on the durian tray (2), closing the closed door (12), operating the display control device, capturing an image of the durian using the image capture device (8), and capturing weight data using the weighing device; The collected image data is fed back to an external detector for spectral analysis to obtain the surface color data of the current durian being tested and marked with a serial number; S2, volatile sulfide content detection; When image acquisition is started, the exhaust fans (5) at the fresh air inlet pipe (3) and the fresh air outlet pipe (4) start working to promote air flow in the detection box (1). After 10 seconds, the electromagnetic switch valve (64) opens, and the solvent leaks out from the solvent tank and adheres to the solvent cotton pad (65). The sampling card is inserted, and the sampling card first passes through the solvent cotton pads (65) to carry the solvent on the surface of the sampling card. The sampling card is moved into the air chamber (61). The volatile sulfide emitted by the durian after full mixing contacts the sampling card and dissolves in the solvent attached to the sampling card. After 10 seconds, the sampling card is taken out, and the self-resetting air baffle (66) blocks the sampling card slot (62); Send the sampling card to the liquid chromatograph for chromatographic analysis to obtain sample chromatographic data, which are marked with the same serial number as the image acquisition data; S3, comprehensively judging the maturity of the currently measured durian according to the data measured by S1 and S2; According to different durian varieties, spectral data thresholds of different intervals are set, and the spectral values ​​of immature and fully mature surface colors are taken as the judgment threshold intervals. The middle value is the spectral mean. If it is lower than the mean, it is judged as immature, and the display control device feedbacks the maturity of the current sample number as "immature"; if it is higher than the mean, it is judged in combination with the chromatographic data obtained by chromatographic analysis; The chromatographic values ​​of the sulfide solutions volatilized by immature and fully mature durian were taken as the judgment threshold interval, and the middle value was taken as the chromatographic mean; When the weight of the durian in S1 is greater than or equal to 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is less than the chromatographic mean value, it is determined to be not fully mature, and the display control device feedbacks the maturity of the current sample number as "not fully mature"; When the weight of the durian in S1 is greater than or equal to 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is greater than the chromatographic mean value, it is determined to be fully mature, and the display control device feedbacks the maturity of the current sample number as "fully mature"; When the weight of the durian in S1 is less than 1.5KG, the obtained spectrum value is greater than the mean value, and the chromatographic analysis data is lower than the minimum chromatographic value + (maximum chromatographic value - minimum chromatographic value) 40%, it is judged to be not fully mature, and the display control device feedbacks the maturity of the current sample number as "not fully mature"; When the weight of the durian in S1 is less than 1.5KG, the obtained spectral value is greater than the mean value, and the chromatographic analysis data is greater than the minimum chromatographic value + (maximum chromatographic value - minimum chromatographic value) 40%, it is judged to be fully mature, and the display control device feedbacks the maturity of the current sample number as "fully mature".

Images