CN103472011A - Portable fruit internal-quality detection device using optical detector - Google Patents

Abstract

The invention discloses a portable fruit internal quality detection device using an optical detector. The device has a box structure, a display is arranged on the side of the box, and a single-chip microcomputer, a fan, a power supply, a partition, a fruit support platform and an optical fiber are arranged in the box. The detector, in which the optical detector fully integrates the light source, integrates optical components and electronic components. An optical detector is placed directly under the support platform, and the near-infrared spectrum of the fruit can be detected directly through the optical detector. The device is simple in structure, small in size, good in stability, convenient and fast in detection, and collects spectra in a diffuse reflection manner, and is suitable for rapid non-destructive testing on site.

Description

A portable fruit internal quality detection device using an optical detector

technical field

The invention relates to a portable fruit internal quality detection device, in particular to a portable fruit internal quality detection device using an optical detector, which belongs to the technical field of non-destructive detection of agricultural and forestry products.

Background technique

Soluble solid content (SSC) refers to sugar, acid, minerals, vitamins, etc. that can be dissolved in water. It is one of the important indicators of the internal quality of fruits, so how to measure it accurately and quickly is of great significance. For now, the destructive chemical detection method is still the main method of fruit internal quality detection, but its complicated sample preparation, long detection time, and professional operation are required, which greatly limit the scope of application of this method. The near-infrared detection of the internal quality of fruits refers to the measurement of parameters such as sugar content, acidity, and vitamins of fruits without damaging the appearance of fruits. It has the characteristics of fast, non-destructive, and high efficiency. The invention provides a portable fruit internal quality detection device using a new type of optical detector, the optical detector includes a sapphire window, a light source, a lens, a linear gradient filter, a detector, etc. The detector adopts 128-line element uncooled InGaAs array detector, which is powered by USB. , Application problems in the case of online testing.

Chinese Patent Publication No. CN102866117A discloses a portable fruit internal quality non-destructive testing device and method. The light source in the device adopts a plurality of halogen tungsten lamps, which distribute light in a ring, and an electric fan is installed in the device to prevent the temperature in the device from being too high. Although the instability of the near-infrared spectrum detection caused by the high temperature is solved, the structural Complex, high-power tungsten-halogen lamps affect the life of the instrument and affect the stability of the test.

Chinese Patent Publication No. CN1648644A discloses a portable non-destructive detection device for internal quality of fruit. The device uses multiple monochromatic LED light sources to correct the effect of scattering and eliminate the interference of background components. LED lights with different wavelengths are arranged in a staggered manner to reduce the unevenness of the sample. However, due to the limited wavelength range of the LED light, the complete spectral information of the fruit cannot be obtained well, which affects the accuracy of the detection. the

Considering various detection requirements, there is no portable device that can detect the internal quality of fruits very stably, quickly and accurately.

Contents of the invention

The object of the present invention is to overcome the shortcomings of existing fruit internal quality detection devices, and provide a portable fruit internal quality detection device using an optical detector to achieve rapid, non-destructive and on-site detection.

The technical scheme that realizes the object of the present invention is:

A portable fruit internal quality detection device using an optical detector, characterized in that the device has a box structure; There are optical detectors, partitions, single-chip microcomputers, power supplies, switches, fans, clamp hands, fruit support platforms and annular soft gaskets; the upper surface of the fruit support platform is a cone-shaped structure, and the support directly above the cone-shaped structure is detected fruit; the inside of the fruit support table is provided with a 60*60mm through hole located directly under the fruit to be detected, which is used to place the optical detector, and the radial and axial positioning is performed by the clamp hand, which is fixed on the fruit support through threaded connection The inner side of the platform; the support platform is provided with an opaque annular soft gasket, which can be in close contact with the surface of the fruit to be detected; the bottom of the fruit support platform is vertically fixed on the partition through screw connections; the partition is horizontally fixed to the connection box Inside the inner wall, the power supply and single-chip microcomputer are placed under the partition, and fans are installed on both sides; the diffuse reflectance spectrum is detected by an optical detector based on a linear gradient filter, which includes a sapphire window, a light source, a lens, and a linear gradient filter. Light sheet, detector, etc., the light source adopts dual integrated vacuum tungsten lamps, the detector adopts 128-line element uncooled InGaAs array detector, powered by USB (the current is less than 500 mA at 5 volts), and has a compact appearance , fast detection, good stability, high resolution and other technical characteristics and no other moving parts are needed at all, which solves the application problem in the case of on-site and online testing; the box structure is adopted, and the upper part of the box is opened by a buckle lock. Closed box cover, belt handle is fixed on the top surface of the box cover, which is easy to carry. There are ventilation holes on the side wall below the box body to solve the problem of heat dissipation; there is an electric fan inside the box body, and the heat can be discharged through the ventilation holes when the fan is running. , to prevent the internal temperature of the device from being too high.

Compared with existing devices, the present invention has the beneficial effects of:

(1) The optical detector used in the device of the present invention is a micro-system based on a linear gradient filter, which completely integrates a light source, a light-collecting element, and an electronic element. The light source adopts dual integrated vacuum tungsten lamps, with a service life of more than 18,000 hours, and the detector adopts a 128-line element uncooled InGaAs array detector.

(2) The optical detector uses a linear gradient filter to be directly coupled to a linear detector array to form a sensor that can provide spectral information. It has a simple structure, no moving parts, greatly improved stability and accuracy, and can be widely used in various industry.

(3) The optical detector is powered by USB (5V). The low-power vacuum tungsten lamp can meet the detection requirements, save energy and increase the service life of the instrument.

(4) The device of the present invention is equipped with a fan and a ventilation hole, which can avoid the decrease of the detection accuracy caused by the increase of the detection environment temperature.

(5) The device of the present invention is compact in structure, small in size, easy to carry around, suitable for rapid on-site detection, and can realize rapid non-destructive detection of sugar content, acidity and vitamin C in fruit internal quality.

The present invention is applicable to on-the-spot rapid and non-destructive detection of sugar content, acidity and vitamin C of fruit internal quality.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is the structural representation of optical detector;

Fig. 3 is the circuit diagram of constant current source;

Fig. 4, Fig. 5 present invention detects the scatter diagram of the soluble solids detection model of fruit;

Fig. 6 is a flow chart of the working process of the present invention.

Figure number marks in the attached drawings:

(1) Belt handle; (2) Buckle lock; (3) Optical detector; (4) Sapphire window; (5) Control and reading instrument; (6) USB interface; (7) Detector; (8) Linear Gradient filter; (9) lens; (10) light source; (11) bolt; (12) partition; (13) wire; (14) microcontroller; (15) power supply; (16) switch; (17) fan ;(18) Display (19) Clamp Hand (20) Air Vent (21) Fruit Support Table; (22) Ring Soft Washer.

Detailed ways:

A portable fruit internal quality detection device using a new type of optical detector in an embodiment of the present invention is described in Figures 1 to 2. A portable fruit internal quality detection device using a new type of optical detector, the device has a box structure, the upper cover of the box is provided with a belt handle (1), a buckle (2), and the outer wall of the box is provided with a display (18), Air vent (20), optical detector (3), clapboard (12), single-chip microcomputer (14), power supply (15), switch (16), fan (17), clamp hand (19), fruit The support platform (21) and the annular soft gasket (22); the upper upper surface of the fruit support platform (21) is a conical structure, and the fruit to be detected is supported directly above the conical structure; the inside of the fruit support platform (21) There is a through hole located directly below the detected fruit for placing the optical detector (3); the bottom of the fruit support table (21) is connected and vertically fixed on the partition (12) by screws (11); the partition (11 ) is horizontally fixedly connected to the inner wall of the box, a power supply (15) and a single-chip microcomputer (14) are placed under the partition (12), and fans (17) are installed on both sides. The optical detector (3) includes a sapphire window (4), a control and reading instrument (5), a USB interface (6), a detector (7), a light source (10), a lens (9), a linear gradient filter (8), the lower two sides of the sapphire window are respectively connected to the light source, a lens is connected between the two light sources, the lens is connected to the linear gradient filter, the linear gradient filter is connected to the detector, and the detector is connected to the control and reading instrument , The control and reading instruments are connected to the USB interface, the light source adopts dual integrated vacuum tungsten lamps, and the detector adopts a 128-line element uncooled InGaAs array detector, powered by USB.

As shown in Figure 1, the device of the present invention has a box structure with a belt handle (1) on the box cover, which is not easy to fall off and is easy to carry; the side wall above the box has ventilation holes (20) for heat dissipation inside the box.

As shown in Figure 1, a small integrated optical detector (3), clamp hand (19), fruit support table (21), fan (17), power supply (15), single-chip microcomputer (14), etc. are accommodated in the inner cavity of the box . The optical detector (3) includes a sapphire window (4), a light source (10), a lens (9), a linear gradient filter (8), a detector (7), etc.; a linear gradient filter (8) It is directly coupled with the detector (7) to form a sensor that can provide spectral information; it is the application of the linear gradient filter that makes the optical detector compact and light; and because of the integrated light source and light-collecting elements, The electronic components are integrated, so the stability is better than other optical detectors, and the precision is also higher.

The fruit support platform (21) is located in the middle of the box and is used to support the fruit to be detected; in order to make the fruit and the support platform tightly combined to prevent the interference of external light, a rubber gasket (22) is installed on the upper end of the tapered support platform; a small optical The detector (3) is fixed in the fruit support table by the clamp hand (19), and the spectral information is collected by diffuse reflection.

As shown in Figure 2, after testing, when the light source (10) is 45 degrees to the horizontal direction, the detection effect is the best and a double integrated vacuum tungsten lamp is sufficient to meet the detection accuracy requirements. the

Figure 3 is the circuit diagram of the constant current source.

Fig. 4 and Fig. 5 are scatter diagrams of the soluble solids detection model of the detection fruit of the present invention.

As shown in Figure 6, the working process of the portable fruit quality detection device of the present invention comprises the following steps:

1. Turn on the device;

2. The fruit is placed on the support platform (21), so that the fruit and the ring gasket (22) are tightly combined;

3. The light source (10) emits light and shines on the fruit. The diffuse reflection light is focused by the lens (9), then split by the linear gradient filter (8), and then transmitted to the detector (7) and the control and reading instrument ( 5), so that the spectral information is converted into digital information, which is transmitted to the single-chip microcomputer (14) through the data line;

4. Substitute into the model, calculate the internal quality of the fruit, and display the result on the monitor (18).

5. After the fruit inspection is completed, turn off the power supply (15), ensure that the optical detector (3) and the fan (17) stop operating, close the cover of the device, press the buckle lock (2), and put the detection device in a suitable position , the operation ends.

Claims (7)

1. A portable fruit internal quality detection device using an optical detector, characterized in that the device has a box structure, the upper cover of the box is provided with a belt handle (1), a buckle (2), and the outer wall of the box is provided with Display (18), air vent (20), optical detector (3), clapboard (12), single-chip microcomputer (14), power supply (15), switch (16), fan (17), clamp hand are arranged in the chassis (19), fruit support platform (21) and annular soft gasket (22); the upper upper surface of the fruit support platform (21) is a conical structure, and the fruit to be detected is supported directly above the conical structure; the fruit support platform The interior of (21) is provided with a through hole located directly below the detected fruit for placing the optical detector (3); the bottom of the fruit support table (21) is vertically fixed on the partition (12) through screws (11) The partition (11) is horizontally fixedly connected to the inner wall of the box, the power supply (15) and the single-chip microcomputer (14) are placed under the partition (12), and fans (17) are installed on both sides. 2. A portable fruit internal quality detection device using an optical detector according to claim 1, characterized in that the optical detector (3) based on a linear gradient filter can directly detect the diffuse reflectance spectrum, and the optical detection The device (3) includes a sapphire window (4), a control and reading instrument (5), a USB interface (6), a detector (7), a light source (10), a lens (9), a linear gradient filter (8 ), the lower two sides of the sapphire window are respectively connected to light sources, a lens is connected between the two light sources, the lens is connected to a linear gradient filter, the linear gradient filter is connected to a detector, the detector is connected to a control and reading instrument, and the control and The reading instrument is connected to the USB interface, the light source adopts dual integrated vacuum tungsten lamps, and the detector adopts a 128-line element uncooled InGaAs array detector, which is powered by USB. 3. A portable fruit internal quality detection device using an optical detector according to claim 1, characterized in that the optical detector (3) is located in the internal through hole of the fruit support table (21), and is controlled by the clamp hand (19) ) for radial and axial positioning, and the clamp hand (19) is fixed on the inner side of the fruit support table (21) through a threaded connection. 4. A portable fruit internal quality detection device using an optical detector according to claim 1, characterized in that it adopts a box structure, and the box cover is opened and closed by a buckle (2) on the top of the box, and the top of the box cover is A belt handle (1) is fixedly arranged on the surface, and a ventilation hole (20) is opened on the side wall below the box body. 5. A portable fruit internal quality detection device using an optical detector according to claim 1, characterized in that an electric fan (17) is installed inside the box. 6. A portable fruit internal quality detection device using an optical detector according to claim 1, characterized in that the fruit support platform (21) is a conical structure, and there is a 60*60mm through hole in the middle of the structure for placing The optical detector (3) is provided with an opaque annular soft gasket (22) on the supporting platform (21), and the annular soft gasket (22) can be in close contact with the surface of the fruit to be detected. 7. a kind of portable fruit internal quality detection method of applying optical detector according to claim 1, is characterized in that the steps are: 1) Turn on the device; 2) The fruit is placed on the support platform (21), so that the fruit and the ring gasket (22) are tightly combined; 3) The light source (10) emits light and shines on the fruit. The diffuse reflection light is focused by the lens (9), then split by the linear gradient filter (8), and then transmitted to the detector (7) and the control and reading instrument ( 5), so that the spectral information is converted into digital information, which is transmitted to the single-chip microcomputer (14) through the data line; 4) Substituting into the model, calculating the internal quality of the fruit, and displaying the result on the monitor (18); 5) After the fruit detection is completed, turn off the power supply (15), ensure that the optical detector (3) and the fan (17) stop operating, close the cover of the device, press the buckle lock (2), and put the detection device in a suitable position , the operation ends.

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