CN219284979U - A new type of infrared non-destructive measuring device for sugar content of fruit - Google Patents

Abstract

The utility model discloses a novel infrared non-destructive measuring device for sugar content of fruit, which is composed of a base, a dimple, a dovetail groove support, a dovetail groove, a sliding platform, a dovetail guide rail, an external light-blocking suction cup, a hollow screw, a screw fixing nut, a spring and an upper end. Nut, infrared light source circuit board, sleeve, light-emitting frosted glass, internal light-shielding suction cup, infrared LED lamp, photosensitive transistor, light-incoming frosted glass, signal line, lower end fixing nut and power line. The sliding platform can slide on the dovetail bracket according to the size of the fruit to be adjusted to a suitable position. The hollow screw rod can be controlled to move up and down by compressing the spring until both the inner light-shielding sucker and the outer light-shielding sucker are in close contact with the fruit to prevent interference from stray light. The utility model utilizes infrared light to irradiate the fruit, and a photoelectric conversion circuit analyzes the light intensity of the transmitted infrared light, thereby realizing non-destructive detection.

Description

A new type of infrared non-destructive measuring device for sugar content of fruit

technical field

The utility model relates to the technical field of photoelectron technology detection and analysis, in particular to a novel infrared non-destructive measuring device for sugar content of fruit.

Background technique

China is one of the largest fruit producing countries, fruit importing countries and fruit exporting countries in the world. The fruit planting area has exceeded 12 million hectares and the output has reached nearly 280 million tons. The quality of fruit directly affects its sales. How to measure the sugar content of fruit is an important research topic. At present, the non-destructive testing instruments for fruit have been developed into two main types. One is the conventional measuring instrument that uses destructive measurement, which analyzes the juice by crushing the fruit and squeezing the juice. The measurement process will cause waste due to the destruction of the fruit sample, and the measurement efficiency is low. , and cannot realize the defects such as the growth monitoring of individual fruit sugar content. The other is the non-destructive testing sugar content meter represented by Japan's Aituo brand, which uses infrared light to analyze the optical signal to obtain the sugar content of the fruit. This measurement method realizes non-destructive measurement, but the price is very high and the number of users is limited. All in all, the non-destructive testing methods and sales prices of testing instruments currently on the market cannot be taken into account at the same time, so it is difficult to promote them.

Utility model content

The purpose of this utility model is to design a new type of infrared non-destructive measuring device for sugar content of fruit, which avoids the lack of destructive sugar content detection and the cost performance of existing products, is convenient and quick to use, saves time and effort, and will not damage the test sample, and realizes non-destructive testing. It can improve measurement efficiency and help fruit planting.

The utility model is realized through the following technical solutions: a novel infrared non-destructive measuring device for sugar content of fruit, including a base, a dovetail groove support, a sliding platform and a hollow screw, the dovetail groove support is arranged on the base, and the sliding platform is movably fitted in the dovetail groove On the bracket, an external light-shielding suction cup is installed below the sliding platform, a screw fixing nut is set above the hollow screw, the hollow screw runs through the sliding platform, and a spring, an upper fixing nut, Infrared light source circuit board, sleeve, light-emitting frosted glass, lower end fixing nut, and internal light-shielding suction cup. Nine infrared LED lights are installed on the infrared light source circuit board. Glass, the pins of the phototransistor pass through the bottom of the internal light-shielding suction cup and are connected to signal lines. When in use, the power supply supplies power to the infrared light source circuit board and the phototransistor through the power cord.

Further, in order to better realize a new type of infrared non-destructive measuring device for sugar content of fruit described in the utility model, the following setting structure is adopted in particular: the base is provided with dimples facing the sliding platform.

Further, in order to better realize a new type of infrared non-destructive measuring device for sugar content of fruit described in the utility model, the following setting structure is adopted in particular: two dovetail grooves are arranged on the dovetail groove bracket, and two dovetail grooves are installed on the sliding platform. There are dovetail tracks, and the dovetail slots cooperate with the dovetail tracks.

Further, in order to better realize a new type of infrared non-destructive measuring device for fruit sugar content described in the utility model, the following setting structure is adopted in particular: the hollow screw is suspended on the sliding platform through the screw fixing nut.

Further, in order to better realize a new type of infrared non-destructive measuring device for sugar content of fruit described in the utility model, the following setting structure is particularly adopted: 9 infrared LED lamps are distributed at equal intervals on the circumference of the infrared light source circuit board, and The angular interval between two adjacent infrared LED lamps is 40°.

Further, in order to better realize a new type of infrared non-destructive measuring device for sugar content of fruit described in the utility model, the following setting structure is adopted in particular: when measuring fruit, the spring provides elastic force, so that the internal light-shielding suction cup and the The external light-shielding suction cups are all closely attached to the surface of the fruit.

Further, in order to better realize a new type of infrared non-destructive measuring device for sugar content of fruit described in the utility model, the following setting structure is adopted in particular: the infrared light source circuit board, infrared LED lamp, sleeve and light-emitting frosted glass constitute a light-emitting module , the photosensitive transistor and the light-incoming frosted glass constitute a light-receiving module, and the upper-end fixing nut and the lower-end fixing nut fix the light-emitting module on the hollow screw; The module is fixed at the end of the hollow screw; when the hollow screw moves up and down, the relative positions of the light-emitting module and the light-receiving module remain unchanged.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

The utility model avoids destroying test samples, uses infrared light irradiation to obtain sugar content information, improves measurement efficiency, does not consume apples, and saves time and effort under the premise of not destroying fruits.

Compared with the existing non-destructive detection, the utility model avoids the influence of complex optical signals such as external spectrum and wavelength, uses light intensity measurement to simplify the technical scheme, and can directly measure on the tree.

Compared with the existing technical products of the same kind, the utility model has a manufacturing cost nearly 10 times lower, is economical and practical, and has a wider audience.

The utility model is equipped with an infrared LED lamp and a photosensitive triode, and the infrared light penetrates the fruit, and different sugar levels have different absorption degrees of the infrared light. Brix, to achieve non-destructive testing.

The utility model utilizes the dovetail track, so that the sliding platform can relatively slide in the dovetail groove to adapt to the size of the fruit to be tested, and increase the universality of the device.

In the utility model, by compressing the spring sleeved on the hollow screw, the light-emitting module and the light-receiving module move upward at the same time until both the inner light-blocking sucker and the outer light-blocking sucker are attached to the surface of the fruit to achieve the best measurement effect.

In the utility model, by arranging the infrared light source circuit board, the angular interval between the infrared LED lamps is 40°, which greatly improves the light irradiation intensity and light uniformity.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view of the sliding platform of the present invention.

Fig. 3 is a bottom view of the sliding platform of the present invention.

Fig. 4 is a disassembled view of the internal structure of the utility model.

Fig. 5 is a diagram of an optimal circuit structure on the circuit board of the infrared light source of the present invention.

Fig. 6 is a preferred circuit diagram of the light receiving module of the present invention.

Figure 7 is the sugar content-voltage change curve when the measuring device is used to detect Shandong Red Fuji at 26°C.

Among them, 1-base, 2-dimple, 3-dovetail groove bracket, 4-dovetail groove, 5-sliding platform, 6-dovetail track, 7-external light blocking suction cup, 8-hollow screw, 9-screw fixing nut, 10-spring, 11-fixing nut at the upper end, 12-infrared light source circuit board, 13-sleeve, 14-light-emitting frosted glass, 15-internal light-blocking suction cup, 16-infrared LED light, 17-photosensitive triode, 18-incoming light Frosted glass, 19-signal line, 20-fixing nut at the lower end, 21-power line.

Detailed ways

The utility model will be described in further detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

In order to make the purposes, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments described above are some of the embodiments of the present utility model, but not all of them. Based on the implementation manners in the present utility model, all other implementation manners obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting", "layout", "fixation" and other terms should be understood in a broad sense, for example, it can be The fixed connection can also be a detachable connection, or integrated, and the specific means are not limited to various conventional mechanical connection methods such as screw connection, interference fit, riveting, thread auxiliary connection, etc. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Example 1:

As shown in Figures 1 to 4, a new type of infrared non-destructive measuring device for sugar content of fruits avoids the lack of destructive sugar content detection and the cost performance of existing products. , which can improve measurement efficiency and help fruit planting, including a base 1, a dovetail bracket 3, a sliding platform 5 and a hollow screw 8, the dovetail bracket 3 is arranged on the base 1, and the sliding platform 5 is movably matched on the dovetail bracket 3 An external light-shielding suction cup 7 is installed below the sliding platform 5, a screw fixing nut 9 is set above the hollow screw 8, the hollow screw 8 runs through the sliding platform 5, and the hollow screw 8 inside the sliding platform 5 is installed with Spring 10, upper end fixing nut 11, infrared light source circuit board 12, sleeve 13, light-emitting frosted glass 14, lower end fixing nut 20, internal light-shielding suction cup 15, and 9 infrared LED lamps 16 are installed on the infrared light source circuit board 12 , the internal light-shielding sucker 15 is equipped with a phototransistor 17 and a light-incident frosted glass 18, and the pins of the photosensitive transistor 17 pass through the bottom of the inner light-shielding sucker 15 and are connected to a signal line 19. When in use, the power supply passes through the power cord 21 supplies power for the infrared light source circuit board 12 and the phototransistor 17.

When in use, the signal line 19 is connected with the measurement display circuit (which can be set separately or directly on the measurement device, and the preferred measurement display circuit is built based on the STM32 type MCU chip). When measuring, it can be used The frame-like structure limits the fruit to be detected below the sliding platform 5, and by moving the sliding platform 5 up and down on the dovetail bracket 3, the internal light-shielding sucker 15 is first contacted with the surface of the fruit. Simultaneously, because the sliding platform 5 has its own weight, the spring 10 sleeved on the hollow screw rod 8 is compressed, causing the hollow screw rod 8 to move upward. When the inner light-shielding sucker 15 and the outer light-shielding sucker 7 are all in close contact with the fruit surface, the position adjustment is completed at this time, so that no external light enters the infrared light irradiation part, thereby eliminating stray light interference. Finally, the infrared light source circuit board 12 is energized, and the infrared LED lamp 16 emits infrared light and shines into the fruit to be tested. Part of the reflected light will pass through the fruit and be received by the phototransistor 17, and then the voltage generated by the measurement display circuit according to the measured reflected light is completed. The non-destructive testing can be completed by matching the sugar content. As shown in Figure 7, at 26°C, the sugar content-voltage change curve when the measuring device is used to detect Shandong Red Fuji.

Voltage and sugar content matching process: At a certain temperature, a large number of fruit samples of the same variety are tested, and the voltage value corresponding to the outgoing light is recorded. At the same time, a standard sugar meter is used to measure the sugar content of each sample, and the data is fitted to obtain the fruit of the variety. Brix-voltage relationship at this temperature. Similarly, the utility model can be used to measure the "sugar content-voltage" relationship of different varieties of fruits, and a large number of sample data ensures the accuracy of the fitting relationship. Therefore, in the actual measurement, the corresponding sugar content can be calculated according to the fitted polynomial function (y=2×10 ^-5 x ² -0.0324x+24.712) of the known voltage value, so as to realize non-destructive testing.

Example 2:

This embodiment is further optimized on the basis of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here, as shown in Figures 1 to 4, further to better realize a function described in the present invention. A new type of infrared non-destructive measuring device for sugar content of fruit, which particularly adopts the following setting structure: a dimple 2 is arranged on the base 1 facing the sliding platform 5. When in use, due to the setting of the dimple 2, the apple to be detected can be It is directly placed in the dimple 2, so that it is not necessary to use an additional limiting structure to limit the apple to be detected under the sliding platform 5, thereby achieving a better detection effect.

Example 3:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here, as shown in Figures 1 to 4, further to better realize the description of the utility model A new type of infrared non-destructive measuring device for sugar content of fruit, especially adopts the following structure: two dovetail grooves 4 are arranged on the dovetail groove support 3, dovetail rails 6 are installed on the sliding platform 5, and the dovetail grooves 4 is matched with the dovetail track 6; when making the measuring device detect. According to the size of the fruit to be tested, the inner light-shielding sucker 15 and the outer light-shielding sucker 7 on the sliding platform 5 are close to the fruit to be tested by changing the position of the dovetail track 6 on the dovetail groove 4 .

Example 4:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here, as shown in Figures 1 to 4, further to better realize the description of the utility model A new type of infrared non-destructive measuring device for sugar content of fruit, especially adopts the following setting structure: the hollow screw 8 is suspended on the sliding platform 5 through the screw fixing nut 9; that is, the screw fixing nut 9 set above the hollow screw 8, The bottom surface of the screw fixing nut 9 is in contact with the sliding platform 5 without any connection, and the hollow screw 8 can move up and down in the sliding platform 5 .

Example 5:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here, as shown in Figures 1 to 4, further to better realize the description of the utility model A new type of infrared non-destructive measuring device for sugar content of fruit, especially adopts the following structure: on the infrared light source circuit board 12, nine infrared LED lamps 16 are distributed at equal intervals around the circumference, and the distance between two adjacent infrared LED lamps 16 is The angle interval is 40°, which greatly improves the intensity of light irradiation and the uniformity of light.

Embodiment 6:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here, as shown in Figures 1 to 4, further to better realize the description of the utility model A new type of infrared non-destructive measuring device for sugar content of fruit, especially adopts the following structure: when measuring fruit, the spring 10 provides elastic force, so that both the inner light-shielding sucker 15 and the outer light-shielding sucker 7 are tightly connected to the surface of the fruit Paste, so that no external light enters the part irradiated by infrared light, so as to eliminate stray light interference and achieve the best measurement effect.

Embodiment 7:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here, as shown in Figures 1 to 4, further to better realize the description of the utility model A new type of infrared non-destructive measuring device for sugar content of fruit, especially adopts the following structure: the infrared light source circuit board 12, infrared LED lamp 16, sleeve 13 and light-emitting frosted glass 14 constitute a light-emitting module, and the photosensitive transistor 17 and input The light frosted glass 18 constitutes the light receiving module, the upper end fixing nut 11 and the lower end fixing nut 20 fix the light emitting module on the hollow screw 8; the inner light blocking suction cup 15 fixes the light receiving module At the end of the hollow screw 8 ; during the up and down movement of the hollow screw 8 , the relative positions of the light-emitting module and the light-receiving module remain unchanged, greatly reducing errors caused by distance changes.

When in use, after the power supply supplies power to the infrared light source circuit board 12 and the phototransistor 17 through the power line 21, the infrared induction circuit board 12 drives the infrared LED lamp 16 to emit infrared light to illuminate the fruit, and the reflected infrared light is received by the phototransistor 17. , its light conduction characteristics will generate voltage, convert the optical signal into an electrical signal that is easy to analyze, and then transmit the electrical signal to the measurement display circuit through the signal line 19, and complete the matching of sugar content according to the voltage generated by the measured reflected light. Complete non-destructive testing.

Embodiment 8:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the similarities with the aforementioned technical solutions will not be repeated here. As shown in Figures 1 to 6, when the specific settings are used, the infrared light source circuit board 12 is designed to A preferred specific circuit, as shown in Figure 6, includes a step-down constant current source PT4115, a capacitor C (100uF), a resistor R (0.33Ω), an inductor L (68uH), a Zener diode Z, and 9 infrared LED lamps 16 (It is preferred to use infrared LED lamps with a luminous intensity of 965nm, namely LED1 to LED9), and the MCU chip STM32 is connected to the DIM pin of the step-down constant current source PT4115; the optimal circuit of the light receiving module is shown in Figure 6, including phototransistors Q(S2386-18K)17, 3 resistors (R1(2k), R2(10k), R3(200k)), operational amplifier U(LM358), the output of the operational amplifier is connected to MCU(STM32); the power supply adopts 12V DC stabilized voltage source.

When in use, the 12V DC regulated power supply supplies power to the infrared light source circuit board 12 and the light-receiving module (phototransistor 17) through the power cord 21. After the power is turned on, after the infrared LED lamp 16 emits infrared light of a specified wavelength, the phototransistor 17 turns the light The strong signal is converted into a voltage signal that is easy to analyze. At the same time, the voltage is amplified 20 times by LM358 and sent to the STM32 of the measurement display circuit. There are two main functions of the measurement display circuit:

1. Generate a pulse signal with a period of 100ms to control the infrared light source circuit board 12 to light up the infrared LED lamp 16 .

2. A/D conversion is performed on the output voltage of the light receiving module, and then converted into an analog voltage value, and then data analysis is performed to obtain the sugar content value.

Fructose has an absorption effect on infrared light. Fruits with different sugar content have different absorption levels for infrared light. The higher the sugar content, the stronger the absorption of infrared light, and the absorption is particularly significant in the 800nm-1000nm band. The utility model uses a 12V DC stabilized power supply to drive the infrared LED lamp 16 with a luminous intensity of 965nm at a constant current of 600mA, and controls the luminous power of the infrared LED lamp 16 to be fixed at 3W to generate infrared light with a fixed luminous intensity. After the circuit is energized, the infrared LED lamp 16 emits light and irradiates the fruit to be tested. After the infrared light penetrates into the fruit, diffuse reflection will take place inside it. Due to the existence of infrared absorption phenomenon, the intensity of the outgoing light must be numerically smaller than the intensity of the incident light, but the light intensity is not easy to be directly measured. The utility model uses a response range of 320-1100nm and a peak wavelength of 965nm. The model is S2386-18K The phototransistor 17 converts it into a voltage value, and uses the LMS358 operational amplifier to amplify the voltage value by 20 times, so that the subsequent single-chip microcomputer can collect and analyze it. Therefore, the higher the sugar content of the fruit, the weaker the intensity of the outgoing light, and the smaller the voltage value converted from the light intensity, that is, the sugar content and the voltage value have a negative correlation.

Voltage and sugar content matching process: At a certain temperature, a large number of fruit samples of the same variety are tested, and the voltage value corresponding to the outgoing light is recorded. At the same time, a standard sugar meter is used to measure the sugar content of each sample, and the data is fitted to obtain the fruit of the variety. Brix-voltage relationship at this temperature. Similarly, the utility model can be used to measure the "sugar content-voltage" relationship of different varieties of fruits, and a large number of sample data ensures the accuracy of the fitting relationship. Therefore, in the actual measurement, the corresponding sugar content can be calculated according to the known voltage value according to the fitted polynomial function (y=2×10 ^-5 x ² -0.0324x+24.712, where y is the sugar content and x is the voltage). So as to realize the non-destructive detection of apple sugar content.

Temperature also has an impact on sugar content measurement, and this factor must be considered in practical applications (generally, 26°C is the standard).

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification or equivalent change made to the above embodiments according to the technical essence of the utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. A new type of infrared non-destructive measuring device for sugar content of fruit, characterized in that it includes a base (1), a dovetail bracket (3), a sliding platform (5) and a hollow screw (8), and the dovetail bracket (3) is set On the base (1), the sliding platform (5) is movably fitted on the dovetail bracket (3), the external light-shielding suction cup (7) is installed under the sliding platform (5), and the hollow screw (8) is set above the There is a screw fixing nut (9), the hollow screw (8) runs through the sliding platform (5), and the hollow screw (8) located inside the sliding platform (5) is equipped with a spring (10), an upper fixing nut (11), Infrared light source circuit board (12), sleeve (13), light-emitting frosted glass (14), lower end fixing nut (20), internal light-blocking suction cup (15), and 9 are installed on the infrared light source circuit board (12) Infrared LED lamp (16), the internal light-shielding suction cup (15) is equipped with a photosensitive transistor (17) and light incident frosted glass (18), and the pins of the photosensitive transistor (17) pass through the internal light-shielding suction cup (15) A signal line (19) is connected to the bottom. When in use, the power supply supplies power to the infrared light source circuit board (12) and the phototransistor (17) through the power line (21). 2. A new type of infrared non-destructive measuring device for sugar content of fruit according to claim 1, characterized in that: a dimple (2) is provided on the base (1) facing the sliding platform (5). 3. A new type of infrared non-destructive measuring device for sugar content of fruit according to claim 1, characterized in that two dovetail grooves (4) are arranged on the dovetail groove support (3), and two dovetail grooves (4) are arranged on the sliding platform (5) A dovetail track (6) is installed on it, and the dovetail groove (4) is matched with the dovetail track (6). 4. A novel infrared non-destructive measuring device for sugar content of fruit according to claim 1, characterized in that: the hollow screw (8) is suspended on the sliding platform (5) through the screw fixing nut (9). 5. A new type of infrared non-destructive measuring device for sugar content of fruit according to claim 1, characterized in that 9 infrared LED lights (16) are distributed at equal intervals on the circumference of the infrared light source circuit board (12). 6. A new type of infrared non-destructive measuring device for sugar content of fruit according to claim 1, characterized in that: when measuring fruit, the spring (10) provides elastic force so that the inner light-shielding sucker (15) and the outer The light-shielding suckers (7) are all close to the fruit surface. 7. A new type of infrared non-destructive measuring device for sugar content of fruit according to claim 1, characterized in that: said infrared light source circuit board (12), infrared LED lamp (16), sleeve (13) and light-emitting frosted glass ( 14) Constitute a light-emitting module, the photosensitive transistor (17) and light-incident frosted glass (18) constitute a light-receiving module, and the upper-end fixing nut (11) and the lower-end fixing nut (20) fix the light-emitting module on on the hollow screw (8); the internal light-shielding suction cup (15) fixes the light-receiving module at the end of the hollow screw (8); when the hollow screw (8) moves up and down, the The relative positions of the light-emitting module and the light-receiving module remain unchanged.

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