A kiwifruit vitamin C content measuring device and measuring method

Abstract

The present invention relates to the technical field of detecting trace elements in fruits, and particularly relates to a device and a method for measuring the vitamin C content of kiwifruit. The measuring device includes a detection box and a rotary motor, and the output shaft of the rotary motor is fixedly connected to a first pressing block; a thrust device is arranged in the detection box, and a second pressing block is rotatably installed on a sliding plate; a plurality of optical fiber probes are arranged on the detection box; a box body is arranged on the detection box, the box body includes a first brush plate and a second brush plate, a brush sleeve is arranged on the first brush plate, brush filaments are arranged on the second brush plate, brush holes are formed in the side wall of the brush sleeve, a contact end for contacting the surface of the kiwifruit is arranged on the brush sleeve, the brush filaments include a brush rod and a brush filament body, and the brush filament body is used for brushing off the fluff on the kiwifruit; the distance between the first brush plate and the second brush plate is adjustable. In this application, for kiwifruits with different surface colors, different thicknesses of fluff are retained on their surfaces to reduce the influence of the surface color and luster differences of kiwifruits on the detection results and improve the accuracy of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of trace element detection in fruits, and particularly to a device and a method for measuring the vitamin C content of kiwifruit. Background Art

[0002] As a common fruit with very rich nutritional value, kiwifruit is affected by factors such as climate, soil environment, and the management level of growers. The quality of kiwifruit produced by different regions and different growers is different. In order to distinguish the quality of kiwifruit, measuring its vitamin C content for comparison is one of the common means.

[0003] At present, the measurement of the vitamin C content of kiwifruit has changed from traditional destructive chemical analysis and detection to near-infrared diffuse reflectance spectroscopy analysis and detection. Compared with the disadvantages of high cost and low detection efficiency of traditional destructive chemical analysis and detection, near-infrared diffuse reflectance spectroscopy analysis and detection does not require destroying kiwifruit to prepare detection specimens and does not require titration with detection reagents. It has a fast detection speed and high efficiency, so it has gradually become the mainstream detection method.

[0004] However, when using the existing rapid non-destructive detection device for the vitamin C content spectrum of fruits and vegetables manufactured based on near-infrared diffuse reflectance spectroscopy analysis technology to detect the vitamin C content of kiwifruit, there are still some deficiencies:

[0005] Among them, for some varieties of kiwifruit, during the ripening process of kiwifruit, the color of the surface of kiwifruit will change. Usually, the green color on the surface of kiwifruit will gradually fade, and colors such as brownish-yellow, yellowish-brown, light green, and grayish-green will appear;

[0006] However, when using near-infrared diffuse reflectance spectroscopy to analyze and detect the vitamin C content of kiwifruit, the color of the surface of kiwifruit will affect the magnitude of the diffuse reflectance rate and transmittance of kiwifruit to near-infrared light. For kiwifruit with a relatively shiny surface, the reflection of light on its surface is relatively strong. In this way, it will cause near-infrared light to be difficult to carry sample information to reach the detector, resulting in different absorption degrees of light by kiwifruit with different surface colors; at the same time, when detecting the vitamin C content of kiwifruit, usually the pulp in kiwifruit is analyzed. Since the different colors of the surface of kiwifruit will have a greater impact on the absorption degree of light by kiwifruit, when detecting multiple kiwifruits with different colors, there is likely to be a large deviation in the detection results.

[0007] Therefore, based on the above problems, there is an urgent need to design a device for measuring the vitamin C content of kiwifruit at present to improve the accuracy of detection. Summary of the Invention

[0008] The main object of the present invention is to propose a device for measuring the vitamin C content of kiwifruit, so as to solve the problem of low detection accuracy of the existing rapid non-destructive detection device for the vitamin C content of fruits and vegetables in the above-mentioned background technology.

[0009] To solve the above problems, the present invention provides the following technical solutions:

[0010] A device for measuring the vitamin C content of kiwifruit, comprising a detection box and a rotating motor provided on the detection box, the output shaft of the rotating motor is located inside the detection box and fixedly connected to a first pressing block;

[0011] A sliding plate and a thrust device connected to the sliding plate are provided inside the detection box, and the thrust device is used to push the sliding plate to slide along the central axis of the rotating motor. A second pressing block that rotates coaxially with the first pressing block is rotatably installed on the sliding plate, and the second pressing block moves closer to the first pressing block to clamp the kiwifruit;

[0012] A plurality of optical fiber probes are arranged on the detection box along the central axis direction of the rotating motor, and the central axis of the optical fiber probe is vertically intersected with the rotation center line between the first pressing block and the second pressing block;

[0013] The optical fiber probe is connected to a spectrometer through an optical fiber transmission line, and the spectrometer is connected to a computer;

[0014] A box body is provided on the detection box, the box body includes a first brush plate and a second brush plate, a brush sleeve is provided on the first brush plate, brush filaments are provided on the second brush plate, the first brush plate and the second brush plate cooperate with each other so that the brush sleeve is sleeved on the brush filaments; and a plurality of brush holes are formed in the side wall of the brush sleeve, the length direction of the brush holes is the same as the length direction of the brush sleeve, a contact end is provided on the brush sleeve, the contact end is used to contact the surface of the kiwifruit, and the brush filaments include a brush rod and brush filament bodies distributed along the side surface of the brush rod, the brush filament bodies protrude from the brush holes, and the brush filament bodies are used to brush off the fluff of the kiwifruit;

[0015] And the distance between the first brush plate and the second brush plate is adjustable, which is used to adjust the position of the brush filament bodies in the brush holes to adjust the distance between the brush filament bodies and the contact end.

[0016] As a preferred technical solution of the present application, the brush sleeve is made of an elastic material, and the brush rod is made of an elastic material. When the contact end contacts the surface of the kiwifruit and the kiwifruit is driven and rotated by the rotating motor, the brush sleeve drives the brush filament bodies to bend together.

[0017] As a preferred technical solution of the present application, an adjusting assembly is connected between the first brush plate and the second brush plate, and the adjusting assembly is used to adjust the distance between the first brush plate and the second brush plate;

[0018] The adjusting assembly includes a connecting rod, a spring, and an adjusting knob. The connecting rod is fixed on the first brush plate, and a penetrating hole is provided on the second brush plate. The penetrating hole is matched with the connecting rod so that the second brush plate is sleeved on the connecting rod. The spring is sleeved on the connecting rod, and the ends of the spring abut against the first brush plate and the second brush plate. The adjusting knob is in threaded cooperation with the connecting rod so that the adjusting knob abuts against the second brush plate. By rotating the adjusting knob, the position of the threaded knob on the connecting rod is adjusted, and further the distance between the first brush plate and the second brush plate is adjusted.

[0019] As a preferred technical solution of the present application, a card slot is provided on the connecting rod. The length direction of the card slot is the same as the length direction of the connecting rod. A card block is provided on the second brush plate, and the card block is stuck in the card slot. The card slot and the card block cooperate to prevent the second brush plate from rotating relative to the first brush plate.

[0020] As a preferred technical solution of the present application, a sliding tube is slidably installed on the detection box. One end of the sliding tube extends into the detection box and is in communication with the first brush plate. A spray hole is provided on the first brush plate. The sliding of the sliding tube can push the contact end to contact the surface of the kiwifruit, and the gas sprayed from the spray hole is shot at the kiwifruit. A through groove for the box body to movably penetrate is provided on the sliding plate. [[ID=IO]]

[0021] As a preferred technical solution of the present application, buffer pads are fixedly provided on both the first pressing block and the second pressing block, and anti-slip pads are fixedly provided on the buffer pads.

[0022] As a preferred technical solution of the present application, a slide rail extending along the central axis of the rotating motor is provided in the detection box, and the sliding plate is slidably connected to the slide rail.

[0023] As a preferred technical solution of the present application, a box cover is provided on the detection box;

[0024] An exhaust hole is provided at the bottom of the box of the detection box, and a filter screen is provided in the exhaust hole.

[0025] As a preferred technical solution of the present application, the central axis of the sliding tube is vertically intersected with the rotation center line of the first pressing block and the second pressing block.

[0026] As a preferred technical solution of the present application, there are multiple brush sleeves and brush filaments, and they are arranged along the central axis direction of the rotating motor.

[0027] As a preferred technical solution of the present application, there are multiple spray holes, and they are arranged along the central axis direction of the rotating motor.

[0028] As a preferred technical solution of the present application, the second pressing block is rotatably mounted on the sliding plate through the second rotating shaft;

[0029] A first rotating shaft that rotates coaxially with the second rotating shaft is rotatably mounted on the detection box, and one end of the first rotating shaft extends out of the detection box and is fixedly connected to the handwheel;

[0030] The first rotating shaft and the second rotating shaft are fixedly connected by a bendable elastic rod.

[0031] As a preferred technical solution of the present application, there are multiple elastic rods, and they are centrosymmetrically distributed with the first rotating shaft as the center.

[0032] As a preferred technical solution of the present application, turntables are fixedly provided on the first rotating shaft and the second rotating shaft, and multiple elastic rods are fixedly connected to the turntables.

[0033] A method for measuring the vitamin C content of kiwifruit is also provided. Using the kiwifruit vitamin C content measuring device as described above, it includes the following steps:

[0034] Step 1: Clamp the kiwifruit, and use the first pressing block and the second pressing block to clamp the kiwifruit;

[0035] Step 2: Clean the surface of the kiwifruit. Rotate the clamped kiwifruit by using the rotating motor, and use the brush wire body to clean the fluff on the surface of the kiwifruit. At the same time, adjust the distance between the first brush plate and the second brush plate according to the color of the surface of the kiwifruit;

[0036] Step 3: Analyze and detect the kiwifruit, and use the optical fiber probe and the spectrometer to analyze and detect the kiwifruit.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] By setting the brush sleeve and the brush wire in the kiwifruit vitamin C content measuring device of the present invention, and at the same time making the distance between the first brush plate and the second brush plate adjustable, the position of the brush wire body in the brush hole can be adjusted, and then the distance between the brush wire body and the contact end can be adjusted. Furthermore, when cleaning the fluff on the surface of the kiwifruit, after the contact end touches the surface of the kiwifruit, the distance between the brush wire body and the surface of the kiwifruit can be adjusted, and then the distance between the brush wire body and the fluff on the surface of the kiwifruit can be adjusted, so as to adjust the thickness of the fluff brushed off the surface of the kiwifruit by the brush wire body;

[0039] For kiwifruits with different surface colors, the distance between the first brush plate and the second brush plate can be adjusted according to the lightness or darkness of the surface color of the kiwifruit, so as to adjust the distance between the brush filament body and the surface of the kiwifruit, and thus adjust the thickness of the villi removed. When using near-infrared diffuse reflection spectroscopy for analysis and detection, for kiwifruits with lighter surface colors, more villi can be reserved on the surface of the kiwifruit to reduce the reflection intensity of light after irradiating on the surface of the kiwifruit, making it easier for the light to pass through the surface of the kiwifruit and enter the pulp, thereby improving the accuracy of detection; for kiwifruits with darker surface colors, when ensuring that enough light can penetrate the surface of the kiwifruit and enter the pulp, fewer villi can be reserved on the surface of the kiwifruit to reduce the influence of villi and other impurities on the detection results, thereby improving the accuracy of detection. By retaining different thicknesses of villi on the surfaces of kiwifruits with different surface colors, the influence of the color and luster differences on the surface of the kiwifruit on the detection results can be reduced, thereby improving the accuracy of detection;

[0040] Moreover, the setting of the contact end enables the surface of the kiwifruit to directly contact the contact end, which can prevent the brush filament body from directly contacting the surface of the kiwifruit, thereby reducing the damage to the surface of the kiwifruit;

[0041] Moreover, when the surface color of the kiwifruit is lighter and the glossiness is higher, usually the kiwifruit is in the state of being in the process of ripening or just ripe, its villi are harder and not easy to fall off from the surface of the kiwifruit. As the kiwifruit gradually ripens, its surface color gradually deepens, and at the same time the villi gradually become easier to fall off from the surface of the kiwifruit; this makes the ripening situation of the kiwifruit correspond to the color and luster, and also correspond to the firmness of the villi on the surface of the kiwifruit. In this way, the brush filament body of the present application can adjust the distance between the brush filament body and the surface of the kiwifruit according to the ripening situation of the kiwifruit. As the kiwifruit ripens, during detection, the distance between the brush filament body and the surface of the kiwifruit gradually becomes closer. For kiwifruits with a higher degree of ripeness, their villi are more fragile, making the brush filament body closer to the roots of the villi and easier to scrape off the villi. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic structural diagram of one implementation manner of a kiwifruit vitamin C content measuring device of the present application;

[0043] Figure 2 It is a schematic structural diagram of one implementation manner of a kiwifruit vitamin C content measuring device of the present application;

[0044] Figure 3 It is a kiwifruit vitamin C content measuring device of the present application Figure 2 The enlarged structural schematic diagram of part A;

[0045] Figure 4Schematic diagram of a partial structure of one embodiment of a kiwifruit vitamin C content measuring device of the present application;

[0046] Figure 5 A kiwifruit vitamin C content measuring device of the present application Figure 2 Enlarged schematic diagram of part B therein;

[0047] Figure 6 Schematic diagram of the structure of one embodiment of a kiwifruit vitamin C content measuring device of the present application;

[0048] Figure 7 Schematic diagram of the structure of one embodiment of a kiwifruit vitamin C content measuring device of the present application;

[0049] Figure 8 Schematic diagram of the structure of one embodiment of a kiwifruit vitamin C content measuring device of the present application;

[0050] Figure 9 A kiwifruit vitamin C content measuring device of the present application Figure 8 Enlarged schematic diagram of part C therein;

[0051] Figure 10 A kiwifruit vitamin C content measuring device of the present application Figure 8 Enlarged schematic diagram of part D therein;

[0052] Reference numerals in the figure: 1, detection box; 2, rotary motor; 3, first pressing block; 4, sliding plate; 5, thrust device; 6, second pressing block; 7, optical fiber probe; 8, optical fiber transmission line; 9, spectrometer; 10, box body; 11, first brush plate; 12, second brush plate; 13, brush sleeve; 14, brush filaments; 15, brush holes; 16, contact end; 17, brush rod; 18, brush filament body; 19, adjusting assembly; 20, connecting rod; 21, spring; 22, adjusting knob; 23, insertion hole; 24, card slot; 25, clamping block; 26, sliding tube; 27, spray hole; 28, buffer pad; 29, anti-slip pad; 30, through groove; 31, box cover; 32, slide rail; 33, chute; 34, exhaust hole; 35, second rotating shaft; 36, first rotating shaft; 37, hand wheel; 38, elastic rod; 39, turntable; 40, transmitting end; 41, receiving end. Specific embodiments

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention.

[0054] Accordingly, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0055] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0056] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0058] Embodiment 1: Refer to Figures 1-10 as shown in

[0059] A kiwifruit vitamin C content measuring device provided in this embodiment includes a detection box 1 and a rotating motor 2 provided on the detection box 1. The output shaft of the rotating motor 2 is located inside the detection box 1 and fixedly connected to a first pressing block 3;

[0060] A sliding plate 4 and a thrust device 5 connected to the sliding plate 4 are provided inside the detection box 1. The sliding plate 4 is pushed by the thrust device 5 to slide along the central axis of the rotating motor 2. A second pressing block 6 that rotates coaxially with the first pressing block is rotatably installed on the sliding plate 4. The second pressing block 6 moves closer to the first pressing block 3 to clamp the kiwifruit;

[0061] With such a design, kiwifruits of different sizes can be clamped and fixed by the first pressing block 3 and the second pressing block 6.

[0062] A plurality of optical fiber probes 7 are arranged on the detection box 1 along the central axis direction of the rotating motor 2. The central axis of the optical fiber probe 7 is perpendicularly intersected with the rotation center line between the first pressing block 3 and the second pressing block 6;

[0063] In this embodiment, a plurality of optical fiber probes 7 are arranged on the detection box 1 along the central axis direction of the rotating motor 2. The design of the plurality of optical fiber probes 7 increases the number of detection points of the kiwifruit, significantly improving the detection accuracy. The central axis of the optical fiber probe 7 is perpendicularly intersected with the rotation center line between the first pressing block 3 and the second pressing block 6. With this design, as shown in the figure, the detection light emitted from the emitting end 40 of the optical fiber probe 7 can be perpendicularly incident on the outer surface of the kiwifruit, so that its receiving end 41 can receive most of the reflected light, which helps to improve the detection accuracy.

[0064] The optical fiber probe 7 is connected to the spectrometer 9 through an optical fiber transmission line 8, and the spectrometer 9 is connected to a computer;

[0065] In this embodiment, the optical fiber probe 7 is connected to the spectrometer 9 through an optical fiber transmission line 8, and the spectrometer 9 is connected to a computer. The optical fiber probe 7 transmits the received reflection signal to the spectrometer 9 through the optical fiber transmission line 8. The spectrometer 9 cooperates with the computer to analyze and process the spectral data, and finally obtains the vitamin C content in the kiwifruit. Among them, the detection data of multiple detection points are averaged by the computer to improve the detection accuracy.

[0066] Specifically, when the kiwifruit vitamin C content measuring device works, first clamp and fix the kiwifruit with the first pressing block 3 and the second pressing block 6, and then turn on the optical fiber probe 7 to perform spectral detection on some points on the kiwifruit. After the detection is completed, control the rotating motor 2 to drive the kiwifruit to rotate a certain angle, and then repeat the spectral detection. Driving the kiwifruit to rotate by the rotating motor 2 can multiply the number of detection points, which not only further improves the detection accuracy but also does not reduce the detection efficiency. While the traditional spectral rapid non-destructive detection device for the vitamin C content of fruits and vegetables has few detection points and low detection accuracy, and if it wants to achieve multi-point detection, it can only increase the detection points by manually turning the fruits and vegetables with fingers. In this way, the detection efficiency is bound to decrease.

[0067] And a box body 10 is provided on the detection box 1. The box body 10 includes a first brush plate 11 and a second brush plate 12. A brush sleeve 13 is provided on the first brush plate 11, and brush filaments 14 are provided on the second brush plate 12. The first brush plate 11 and the second brush plate 12 cooperate with each other so that the brush sleeve 13 is sleeved on the brush filaments 14; and a plurality of brush holes 15 are formed in the side wall of the brush sleeve 13, and the length direction of the brush holes 15 is the same as the length direction of the brush sleeve 13. A contact end 16 is provided on the brush sleeve 13, and the contact end 16 is used to contact the surface of the kiwifruit. And the brush filaments 14 include a brush rod 17 and brush filament bodies 18 distributed along the side surface of the brush rod 17. The brush filament bodies 18 protrude from the brush holes 15, and the brush filament bodies 18 are used to brush off the fluff on the kiwifruit;

[0068] The distance between the first brush plate 11 and the second brush plate 12 is adjustable, so as to adjust the position of the brush body 18 in the brush hole 15 , thereby adjusting the distance between the brush body 18 and the contact end 16 .

[0069] In the present application, by providing the brush cover 13 and the brush wire 14, the distance between the first brush plate 11 and the second brush plate 12 is adjustable, thereby adjusting the position of the brush wire body 18 in the brush hole 15, and then adjusting the distance between the brush wire body 18 and the contact end 16. When cleaning the fluff on the surface of the kiwi fruit, after the contact end 16 contacts the surface of the kiwi fruit, the distance between the brush wire body 18 and the surface of the kiwi fruit can be adjusted, and then the distance between the brush wire body 18 and the fluff on the surface of the kiwi fruit is adjusted, thereby adjusting the thickness of the fluff on the surface of the kiwi fruit brushed by the brush wire body 18;

[0070] For kiwifruits with different surface colors, the distance between the first brush plate 11 and the second brush plate 12 can be adjusted according to the depth of the surface color of the kiwifruit, thereby adjusting the distance between the brush body 18 and the surface of the kiwifruit, thereby adjusting the thickness of the brushed hairs, so that when using near-infrared diffuse reflectance spectroscopy for analysis and detection, for kiwifruits with lighter surface colors, more hairs can be reserved on the surface of the kiwifruit, thereby reducing the reflection intensity after the light is irradiated on the surface of the kiwifruit, making it easier for the light to pass through the surface of the kiwifruit and enter the pulp, thereby improving the accuracy of the detection; for kiwifruits with darker surface colors, while ensuring that enough light can penetrate the surface of the kiwifruit and enter the pulp, less hairs can be reserved on the surface of the kiwifruit, thereby reducing the influence of debris such as hairs on the detection results, thereby improving the accuracy of the detection, by retaining hairs of different thicknesses on the surface of kiwifruits with different surface colors, thereby reducing the influence of the difference in color and gloss of the kiwifruit surface on the detection results, thereby improving the accuracy of the detection;

[0071] Furthermore, the arrangement of the contact end 16 allows the surface of the kiwifruit to directly contact the contact end 16, thereby preventing the brush body 18 from directly contacting the surface of the kiwifruit, thereby reducing damage to the surface of the kiwifruit.

[0072] And when the surface color of the kiwifruit is lighter and the glossiness is higher, usually the kiwifruit is in the state of being ripe or just ripe. Its villi are harder and not easy to fall off from the surface of the kiwifruit. As the kiwifruit gradually ripens, the surface color of the kiwifruit gradually deepens, and at the same time, the villi gradually become easy to fall off from the surface of the kiwifruit; making the ripening condition of the kiwifruit correspond to the color and luster, and corresponding to the firmness of the villi on the surface of the kiwifruit. In this way, the brush filament body 18 of the present application can adjust the distance between the brush filament body 18 and the surface of the kiwifruit according to the ripening condition of the kiwifruit. As the kiwifruit ripens, during detection, the distance between the brush filament body 18 and the surface of the kiwifruit gradually becomes closer. For kiwifruits with a higher degree of ripeness, their villi are more fragile, making the brush filament body 18 closer to the root of the villi and easier to scrape off the villi.

[0073] As a preferred technical solution of the present application, the brush sleeve 13 is made of an elastic material, and the brush rod 17 is made of an elastic material. When the contact end 16 contacts the surface of the kiwifruit and the kiwifruit is driven by the rotary motor 2 to rotate, the brush sleeve 13 drives the brush filament body 18 to bend together.

[0074] By making the brush sleeve 13 made of an elastic material and the brush rod 17 made of an elastic material. Specifically, the elastic material can be rubber, so that when the kiwifruit rotates by itself and the villi are scraped off by the brush filament body 18, it is convenient for the brush sleeve 13 to drive the brush filament body 18 to bend, so that it is convenient for the brush filament body 18 to deflect towards the villi and easier for the brush filament body 18 to face the villi and scrape off the villi.

[0075] As a preferred technical solution of the present application, an adjusting component 19 is connected between the first brush plate 11 and the second brush plate 12, and the adjusting component 19 is used to adjust the distance between the first brush plate 11 and the second brush plate 12;

[0076] The adjusting component 19 includes a connecting rod 20, a spring 21 and an adjusting knob 22. The connecting rod 20 is fixed on the first brush plate 11, and a through hole 23 is provided on the second brush plate 12. The through hole 23 is matched with the connecting rod 20, so that the second brush plate 12 is sleeved on the connecting rod 20, and the spring 21 is sleeved on the connecting rod 20, and the ends of the spring 21 are abutted against the first brush plate 11 and the second brush plate 12, and the adjusting knob 22 is in threaded cooperation with the connecting rod 20, so that the adjusting knob 22 abuts against the second brush plate 12; by rotating the adjusting knob 22, it is used to adjust the position of the threaded knob on the connecting rod 20, and further adjust the distance between the first brush plate 11 and the second brush plate 12.

[0077] By setting the adjusting component 19, it is convenient to adjust the distance between the first brush plate 11 and the second brush plate 12, so as to facilitate adjusting the thickness of the fluff scraped off the kiwifruit.

[0078] As a preferred technical solution of the present application, a card slot 24 is provided on the connecting rod 20. The length direction of the card slot 24 is the same as the length direction of the connecting rod 20. And a card block 25 is provided on the second brush plate 12. The card block 25 is stuck in the card slot 24. The card slot 24 and the card block 25 cooperate to prevent the second brush plate 12 from rotating relative to the first brush plate 11.

[0079] By setting the card slot 24 and the card block 25, when using the adjusting component to adjust the distance between the first brush plate 11 and the second brush plate 12, the relative rotation between the first brush plate 11 and the second brush plate 12 can be prevented, thereby improving the stability when adjusting the distance between the first brush plate 11 and the second brush plate 12. At the same time, the detachment between the matching brush sleeve 13 and the brush filaments 14 can be prevented.

[0080] Embodiment Two: Refer to Figures 1-10 as shown in

[0081] On the basis of the technical solution of Embodiment One, further, a sliding tube 26 is slidably installed on the detection box 1. The sliding tube 26 is made of a hard material. One end of the sliding tube 26 extends into the detection box 1 and is communicated with the first brush plate 11. And a spray hole 27 is provided on the first brush plate 11. An external airflow with a stable flow rate enters the box body 10 through the sliding tube 26 and then sprays out from the spray hole 27. Therefore, the other end of the sliding tube 26 is connected to a gas source. A common gas source is an air pump. The sliding of the sliding tube 26 can push the brush filaments 14 into contact with the kiwifruit and make the gas sprayed out from the spray hole 27 shoot towards the kiwifruit. With such a design, after the rotating motor 2 drives the kiwifruit to rotate, the brush filaments 14 brush off the fluff and other sundries on the surface of the kiwifruit. The spray hole 27 blows air towards the surface of the kiwifruit at the same time to blow off the fluff and other sundries on the surface of the brush filaments 14 and the kiwifruit. Then the fiber optic probe 7 performs detection, so as to avoid the fluff and other sundries remaining after scraping the epidermis of the kiwifruit from affecting the detection result and further improve the detection accuracy.

[0082] Further, in this embodiment, buffer pads 28 are fixedly provided on both the first pressing block 3 and the second pressing block 6. Preferably, the material of the buffer pad 28 is sponge. An anti-slip pad 29 is fixedly provided on the buffer pad 28. Preferably, the material of the anti-slip pad 29 is rubber. The design of the buffer pad 28 can prevent the first pressing block 3 and the second pressing block 6 from crushing the kiwifruit. The design of the anti-slip pad 29 can prevent the kiwifruit from slipping relative to the pressing block and abrading the outer skin of the kiwifruit, so as to ensure that the first pressing block 3 and the second pressing block 6 reliably clamp the kiwifruit and drive the kiwifruit to rotate smoothly.

[0083] Further, in this embodiment, a slide rail extending along the central axis of the rotating motor 2 is provided inside the detection box 1, and the slide plate 4 is slidably connected to the slide rail. The design of the slide rail helps to improve the smoothness of the sliding of the slide plate 4.

[0084] Preferably, there are multiple brush sleeves 13 and multiple brush filaments 14, and there are multiple spray holes 27, all of which are arranged along the central axis direction of the rotating motor 2. With this design, the brushing efficiency can be improved and the detection time can be avoided from being delayed. Correspondingly, the length of the box body 10 is relatively large. At this time, in order to prevent it from affecting the sliding of the slide plate 4, a through groove 30 through which the box body 10 can move through is provided on the slide plate 4.

[0085] In this embodiment, a box cover 31 is provided on the upper part of the detection box 1, and slide rails 32 are also provided on the lower surface of the box cover 31. Correspondingly, a sliding groove 33 is provided on the upper surface of the slide plate 4. After the box cover 31 is hermetically fixed to the detection box 1, the slide rails 32 on the lower surface of the box cover 31 are snapped into the sliding groove 33 and slidably connected to the sliding groove 33. With this design, the smoothness of the sliding of the slide plate 4 can be further improved.

[0086] In this embodiment, during the process of the brush filaments 14 brushing the kiwifruit skin, the spray holes 27 blow air towards the kiwifruit surface simultaneously to blow off the fluff and other sundries on the brush filaments 14 and the kiwifruit surface, so as to improve the brushing efficiency. At the same time, in order to prevent the fluff and other sundries from escaping from the detection box 1 and polluting the environment, a box cover 31 is specially added to the detection box 1. At this time, in order to make the air flow smoothly out of the detection box 1, an exhaust hole 34 is provided at the bottom of the detection box 1, and a filter net (not shown in the figure) is provided in the exhaust hole 34, and the filter net can filter the fluff and other sundries.

[0087] Preferably, the central axis of the sliding tube 26 is vertically intersected with the rotation center lines of the first pressing block 3 and the second pressing block 6. With this design, the brush filaments 14 can contact the kiwifruit by moving a relatively small distance of the sliding tube 26.

[0088] Generally, since there may be abnormal factors such as pits, wormholes, cracks, and mildew on the kiwifruit skin, in order to avoid these factors affecting the accuracy of the detection results, these factors should be avoided when determining the detection points. However, the rotation of the kiwifruit driven by the rotating motor 2 to change the detection points cannot guarantee complete avoidance. Therefore, in order to improve the detection accuracy and avoid the above factors from affecting the detection results, the kiwifruit can be rotated manually to change the detection points. During the process of manually rotating the kiwifruit to change the detection points, the situation of the kiwifruit skin is observed with the naked eye to prevent the detection points from being selected on the above influencing factors. At this time, the rotating motor 2 is only used to drive the kiwifruit to rotate when the brush filaments 14 brush off the fluff and other sundries on the kiwifruit skin.

[0089] Correspondingly, the second pressing block 6 is rotatably mounted on the sliding plate 4 through the second rotating shaft 35; a first rotating shaft 36 coaxial with the second rotating shaft 35 is rotatably mounted on the detection box 1. One end of the first rotating shaft 36 extends out of the detection box 1 and is fixedly connected to the hand wheel 37. The first rotating shaft 36 and the second rotating shaft 35 are fixedly connected by a bendable elastic rod 38. The design of the elastic rod 38 enables the sliding plate 4 not to affect the power transmission between the first rotating shaft 36 and the second rotating shaft 35 during the sliding process. The elastic rod 38 shown in the figure and the illustration is in a bent state at this moment.

[0090] When it is necessary to manually rotate the kiwifruit, rotate the hand wheel 37 to drive the first rotating shaft 36 to rotate. The rotation of the first rotating shaft 36 drives the second rotating shaft 35 to rotate through the elastic rod 38, and then drives the second pressing block 6 to rotate. The second pressing block 6 drives the clamped kiwifruit to rotate.

[0091] Preferably, there are multiple elastic rods 38, and they are symmetrically distributed centered on the first rotating shaft 36. This design can improve the overall torsional resistance of the spring 21 rod and make the power transmission between the first rotating shaft 36 and the second rotating shaft 35 more stable. Further, for the convenience of connecting multiple elastic rods 38 to the first rotating shaft 36 and the second rotating shaft 35, turntables 39 are fixedly provided on both the first rotating shaft 36 and the second rotating shaft 35, and multiple elastic rods 38 are fixedly connected to the turntables 39.

[0092] Embodiment 3:

[0093] This embodiment also provides a method for measuring the vitamin C content of kiwifruit. Using the kiwifruit vitamin C content measuring device as described above, it includes the following steps:

[0094] Step 1: Clamp the kiwifruit, and use the first pressing block and the second pressing block to clamp the kiwifruit.

[0095] Step 2: Clean the surface of the kiwifruit. Rotate the clamped kiwifruit by using the rotating motor, and use the brush filament body to clean the fluff on the surface of the kiwifruit. At the same time, adjust the distance between the first brush plate and the second brush plate according to the color of the surface of the kiwifruit.

[0096] Step 3: Analyze and detect the kiwifruit, and use the optical fiber probe and the spectrometer to analyze and detect the kiwifruit.

[0097] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above respective embodiments, the present invention is not limited to the above specific implementation manners. Therefore, any modification or equivalent replacement to the present invention; and all technical solutions and their improvements that do not depart from the spirit and scope of the invention are covered by the scope of the claims of the present invention.

Claims

1. A kiwifruit vitamin C content measuring device, characterized in that, It includes a detection box and a rotating motor arranged on the detection box. The output shaft of the rotating motor is located inside the detection box and is fixedly connected to a first pressing block. A sliding plate and a thrust device connected to the sliding plate are arranged inside the detection box. The sliding plate is pushed to slide along the central axis of the rotating motor through the thrust device. A second pressing block that rotates coaxially with the first pressing block is rotatably installed on the sliding plate. The second pressing block moves closer to the first pressing block to clamp the kiwifruit. A plurality of optical fiber probes are arranged on the detection box along the central axis direction of the rotating motor. The central axis of the optical fiber probe is vertically intersected with the rotation center line between the first pressing block and the second pressing block. The optical fiber probe is connected to a spectrometer through an optical fiber transmission line, and the spectrometer is connected to a computer. A box body is arranged on the detection box. The box body includes a first brush plate and a second brush plate. A brush sleeve is arranged on the first brush plate, and brush filaments are arranged on the second brush plate. The first brush plate and the second brush plate cooperate with each other so that the brush sleeve is sleeved on the brush filaments. A plurality of brush holes are formed in the side wall of the brush sleeve, and the length direction of the brush holes is the same as the length direction of the brush sleeve. A contact end is arranged on the brush sleeve, and the contact end is used to contact the surface of the kiwifruit. The brush filaments include a brush rod and brush filament bodies distributed along the side surface of the brush rod. The brush filament bodies expose from the brush holes, and the brush filament bodies are used to brush off the fluff of the kiwifruit. Moreover, the distance between the first brush plate and the second brush plate is adjustable, which is used to adjust the position of the brush filament bodies in the brush holes to adjust the distance between the brush filament bodies and the contact end.

2. The kiwifruit vitamin C content measuring device according to claim 1, characterized in that, The brush sleeve is made of an elastic material, and the brush rod is made of an elastic material. When the contact end contacts the surface of the kiwifruit and the kiwifruit is driven by the rotating motor to rotate, the brush sleeve drives the brush filament bodies to bend together.

3. The kiwifruit vitamin C content measuring device according to claim 2, characterized in that, An adjusting component is connected between the first brush plate and the second brush plate, and the adjusting component is used to adjust the distance between the first brush plate and the second brush plate. The adjusting component includes a connecting rod, a spring and an adjusting knob. The connecting rod is fixed on the first brush plate, and a through hole is arranged on the second brush plate. The through hole cooperates with the connecting rod so that the second brush plate is sleeved on the connecting rod. The spring is sleeved on the connecting rod, and the ends of the spring abut against the first brush plate and the second brush plate. The adjusting knob is in threaded cooperation with the connecting rod so that the adjusting knob abuts against the second brush plate. By rotating the adjusting knob, it is used to adjust the position of the threaded knob on the connecting rod, and further adjust the distance between the first brush plate and the second brush plate.

4. The kiwifruit vitamin C content measuring device according to claim 3, characterized in that, A clamping groove is arranged on the connecting rod, and the length direction of the clamping groove is the same as the length direction of the connecting rod. A clamping block is arranged on the second brush plate, and the clamping block is clamped in the clamping groove. The clamping groove and the clamping block cooperate with each other to prevent the second brush plate from rotating relative to the first brush plate.

5. The kiwifruit vitamin C content measuring device according to claim 4, characterized in that, A sliding tube is slidably mounted on the detection box. One end of the sliding tube extends into the detection box and is in communication with the first brush plate. The first brush plate is provided with spray holes. The sliding of the sliding tube can push the contact end to contact the surface of the kiwifruit, and the gas ejected from the spray holes is shot at the kiwifruit. A through groove for the box body to movably penetrate is provided on the sliding plate.

6. The kiwifruit vitamin C content measuring device according to claim 5, characterized in that, Buffer pads are fixedly provided on both the first pressing block and the second pressing block, and anti-slip pads are fixedly provided on the buffer pads.

7. The kiwifruit vitamin C content measuring device according to claim 6, characterized in that, A slide rail extending along the central axis of the rotary motor is provided in the detection box, and the sliding plate is slidably connected to the slide rail.

8. The kiwifruit vitamin C content measuring device according to claim 7, characterized in that, A box cover is provided on the detection box; an exhaust hole is provided at the bottom of the detection box, and a filter screen is provided in the exhaust hole.

9. The kiwifruit vitamin C content measuring device according to claim 8, wherein, The central axis of the sliding tube is vertically intersected with the rotation center lines of the first pressing block and the second pressing block; there are multiple brush sleeves and brush filaments, and they are arranged along the central axis direction of the rotary motor; there are multiple spray holes, and they are arranged along the central axis direction of the rotary motor; The second pressing block is rotatably mounted on the sliding plate through a second rotating shaft; a first rotating shaft coaxially rotating with the second rotating shaft is rotatably mounted on the detection box. One end of the first rotating shaft extends out of the detection box and is fixedly connected to a handwheel; the first rotating shaft and the second rotating shaft are fixedly connected by a bendable elastic rod; there are multiple elastic rods, and they are symmetrically distributed with the first rotating shaft as the center; turntables are fixedly provided on the first rotating shaft and the second rotating shaft, and multiple elastic rods are fixedly connected to the turntables.

10. A method for measuring the vitamin C content of kiwifruit, characterized in that, Using the kiwifruit vitamin C content measuring device according to any one of claims 1-9, the following steps are included: Step 1, clamp the kiwifruit, and clamp the kiwifruit using the first pressing block and the second pressing block; Step 2, clean the surface of the kiwifruit. Rotate the clamped kiwifruit by using the rotary motor, and clean the fluff on the surface of the kiwifruit by using the brush filament body. At the same time, adjust the distance between the first brush plate and the second brush plate according to the color of the surface of the kiwifruit; Step 3, analyze and detect the kiwifruit, and analyze and detect the kiwifruit by using the optical fiber probe and the spectrometer.

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