KR20150051817A - The desktop apparatus of non-destructive measurement of sugar contents for pears - Google Patents

Abstract

The present invention relates to an apparatus for non-invasive measurement of sugar contents in pears and, more specifically, to an apparatus for non-invasive measurement of sugar contents in pears using Near Infra-Red (NIR) spectroscopic analysis technique which is one of the many non-intrusive measurement technologies. The apparatus comprises a measurement head unit for mounting pears, a light emitting unit, and a light receiving/spectral unit to allow measurement of pears regardless of place and usage, thereby reducing weight and volume.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-destructive measurement apparatus,

The present invention relates to a table sugar meter for nondestructively measuring the sugar content of a boat, and more particularly, to a table sugar meter for non-destructive measurement, which comprises a known function of a near infrared (NIR) spectroscopic analysis technique And a light receiving unit and a light receiving / spectroscopic head unit constituting the measuring head unit, the light receiving unit and the light receiving / spectroscopic head unit are configured so as to enable the measurement of the sugar content of the boat, And more particularly to a nondestructive nondestructive testing apparatus capable of miniaturization.

The sugar content of the pear varies depending on the species, the harvesting season, the cultivation environment, the cultivation technique, and the storage technology. Therefore, there is a demand for nondestructive banding measurement technique as a quality evaluation means through real-time sugar level measurement of a ship in selection and sale after harvest.

Currently, the non-destructive glucose meter, which is installed in high-speed and large-sized transfer sorters for the purpose of sorting after harvesting in fruit sorting area, is inadequate to be supplied due to high price. Statistical classification method by sampling a small amount of sample fruit The sample error is so large that it fails to satisfy consumer confidence. Therefore, it is not only a means for expanding the use of non-destructive glucose meters in the selection stage after harvest, but also as a means of enabling consumers to directly check the sugar content of fruit in fruit distribution establishments and even fruit stores. Technology is required.

NIR spectroscopy, which measures nondestructively the sugar content of fruit, generally involves a light emitting part with a broadband wavelength, which is a means for irradiating light inside the fruit, and a light receiving part and a spectroscope, which collect light output from the inside of the fruit and detect it by wavelength, Use a sugar content meter, which is the included configuration. From the absorption spectrum obtained from this, correlation with fruit sugar content is made by Calibration Model Equation using Regression Analysis, Math Preprocessing and Correction Equation, Without physically or juice, the physical and chemical properties of fruits such as sugar content, acidity, and internal defects can be measured nondestructively.

The fruit sugar measuring apparatus using the near infrared ray spectroscopy technique generally uses a halogen lamp constituting a light emitting unit and a spectroscope connected to an optical fiber constituting a light receiving unit. The spectroscope measures light passing through the input slit through a lens and a diffraction grating, Image sensor. In the conventional spectroscope, the input slit, the lens, the diffraction grating, and the image sensor are individually manufactured, and a certain arrangement space is required, and mass production is difficult due to precise and complex optical alignment work. In addition, the package including the circuit substrate of the detected signal processing and the drive circuit function is difficult to miniaturize, and the price is also high.

In addition, the light emitting portion constituting the conventional small-sized sugar content measuring device employs a halogen lamp, which has a problem that the measurement depth is reduced and the measurement angle is narrowed due to the low light intensity of the halogen lamp. Increasing the light intensity of a halogen lamp to solve such a problem has a problem of shortening the lifetime and use time of the bulb or causing a lump in the skin due to the wavelength of the unnecessary infrared rays.

On the other hand, the portable fruit sugar meter has been proposed in Patent Publication No. 10-2010-0006143. The above-mentioned prior art provides a tabletop measurement device by irradiating a side or an upper part of fruits with a plurality of halogen lamps and measuring the lower part of the fruits. However, the intensity of the light and the direction of the optical axis It is necessary to increase the size of the measurement structure and the current consumption according to the use of the halogen lamp, the glare of the scattered light around the halogen lamp and the safety and inconvenience due to the generation of high heat, There is a limitation in that there is no description of the seating structure for accurately measuring the sugar content of the fruit having a large displacement and the differentiated structure of the light emitting portion and the light receiving portion.

(Patent Document 1) KR10-1106729 B1

It is an object of the present invention to solve the above-described problems and provide a method for realizing a low-power, low-priced desktop sugar content measuring apparatus that can be miniaturized, lightweight, do.

It is another object of the present invention to provide a light emitting diode integrated modular structure capable of further improving the performance of a conventional light emitting unit made up of a halogen lamp, and a light receiving / spectroscopic And a head unit.

In addition, it is an object of the present invention to provide a configuration for allowing a measurement site of a ship to be seated in a configuration of a measurement head unit considering the influence of various sizes and shapes of the ship.

According to an aspect of the present invention, there is provided a desktop nondestructive testing apparatus, A light emitting unit disposed in the measurement head unit and configured to irradiate light onto a chain of objects to be measured; A body case having a portion penetrated to support the measurement head portion to which the sugar content measurement object is attached; A light receiving / spectroscopic head unit disposed in the measurement head unit while maintaining a predetermined distance from the light emitting unit and detecting light from the ship; And an elastic pad closely attached to the front of the measurement head portion.

Preferably, the intersection point of the imaginary optical axes extending from the light emitting portion and the light receiving / spectroscopic head portion coincides with the center point of the spots.

Preferably, the sugar content meter includes an elastic pad disposed on the measurement head portion, wherein the elastic pad has a shape in which the gathers are in close contact with the inside of the optical axes of the light emitting portion, and the gathers are in close contact with the outside .

Preferably, the light emitting unit includes a substrate, a light emitting diode chip arranged on the substrate, a cylindrical mold surrounding the light emitting diode chip, a resin filled in the cylindrical mold, and a heat sink fixedly arranged on a rear surface of the substrate .

Preferably, the light emitting diode chips are combined at six different center wavelengths and emit light in a wavelength band of 700 nm to 950 nm.

Preferably, the light receiving / spectroscopic head unit includes a body, a lens barrel for fixing the lens barrel fixed to the body, an aspherical lens attached to an end of the barrel, an input window formed on one side of the body, An input slit arranged to be in line with the input window, a silicon substrate formed with the input slit and the image sensor, a glass circuit board attached to a lower surface of the silicon substrate, a diffraction grating An engraved convex lens, and a lead frame electrically connected to the glass circuit board.

The above-described configuration of the present invention can be used to implement a tabletop sugar meter capable of moving, and it is possible to easily measure the sugar content of the fruit at the fruit selection stage, And can be easily applied in a similar manner to the sugar meter of various fruits.

In the present invention, the light-emitting part composed of the light-emitting diode integrated module is not only capable of long-term service life, excellent reproducibility and low cost structure due to mass production, but also has a relatively high light intensity as compared with a halogen lamp, It is possible to enlarge the measurement site and improve the accuracy of the sugar content measurement.

The nondestructive nondestructive testing apparatus according to the present invention can be miniaturized, lightweight, low power consumption and low cost because of the structure including the ultra-small light receiving / spectroscopic head unit and the light emitting diode integrated module.

Particularly, the micro-spectroscopic head of the present invention can be miniaturized and mass-produced by implementing Micro Electromechanical Systems (MEMS) technology and Nano Imprint technology.

1 is a block diagram of a nondestructive nondestructive testing apparatus according to an embodiment of the present invention.
FIG. 2A is a cross-sectional view of a light emitting portion constituting a nondestructive testing apparatus for desktops according to the present invention,
FIG. 2B is a plan view of a light emitting unit constituting a nondestructive apparatus for measuring nondestructive testing of a desktop according to the present invention,
3 is a cross-sectional view of a light receiving / spectroscopic head unit constituting a nondestructive embryo-saccharifying apparatus according to the present invention,
4 is a graph showing the wavelength spectrum characteristics of the light emitting unit and the light receiving /
5A is a perspective view of a nondestructive testing apparatus for a desktop according to an embodiment of the present invention,
FIG. 5B is a plan view of the tablet sugar meter of FIG. 5A,
FIG. 5C is a rear view of the table sugar meter of FIG. 5A,
FIG. 5D is a sectional view of the tablet vessel of FIG. 5A,
FIG. 5E is a side cross-sectional view of the table sugar meter of FIG. 5A. FIG.

The components constituting the nondestructive testing apparatus 100 for a desktop according to the present invention may be used integrally or individually. In addition, some components may be omitted depending on the usage form.

A preferred embodiment of the nondestructive nondestructive testing apparatus 100 according to the present invention will be described with reference to Figs. 1 to 5. Fig. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.

1. Overall structure description of the desktop nondestructive testing apparatus (100)

First, referring to FIG. 1, the overall structure of a desktop nondestructive testing apparatus 100 according to an embodiment of the present invention will be described.

The nondestructive nondestructive testing apparatus 100 for a desktop includes a measuring head 10, a light receiving / spectroscopic head 30 disposed at the center of the measuring head 10, and a light receiving / A light emitting unit 20 disposed on both sides of the measurement head unit 10 while maintaining a predetermined distance from the light receiving and spectroscopic head unit 30 and an infrared temperature sensor 40 and an elastic pad 50 and a controller 110 which are tightly fixed in front of the measurement head 10 in the backward direction. Here, the light receiving / spectroscopic head unit 30 also functions as a light receiving unit and a spectroscopic head unit.

The measurement head unit 10 is designed to have a predetermined curvature as a cradle function in which a vessel as a measurement object is stably placed.

The intersection point of the imaginary optical axes 4 extending from the light emitting unit 20 fixed to the measurement head unit 10 and the imaginary optical axes 4 extending from the light receiving / May be preferred to coincide with the center point of < / RTI > In addition, the equator portion of the ship portion 1 having a diameter of 140 mm and the ship portion 3 having a diameter of 80 mm intersect with the optical axes 4 of the light emitting portion 20. That is, the elastic pads 50 are attached to the measurement head portion 1 such that the equator portions of the pivotal portion 1 and the pivotal portion 3 intersect at the optical axes 4 of the light emitting portion 20. As a result, it is possible to minimize the deviation of the optical axes 4 due to the difference in size and shape of the boat to be measured, and to detect the light diffused and reflected inside the ship in the light receiving / do.

The elastic pad 50 has a shape in which the exhaust port 3 is in close contact with the inside and the exhaust port 1 is in close contact with the outside thereof. The elastic pad 50 may be in the form of a plate, for example, and may be configured to shield noise scattered light inside the epidermis or the sugar content meter 100 of the abdomen. In addition, the elastic pad 50 surrounds the periphery of the fruit so as to shield the inflow of natural light or scattered light from outside, so that the protrusion contacts the fruit skin.

The elastic pad 50 is a flexible member which is attached to the measurement head 10 and is directly adhered directly to the vessel, and a flexible material such as rubber or silicone can be used.

The main functions and operations of the controller 110 will be briefly described below. The light source driving unit 101 constantly irradiates light to the boat fixed to the measuring head unit 10 by causing the light source of the light emitting unit 20 to blink through the self circuit, And collects spectral data of the ship from the satellite 30. After the surface temperature of the boat is collected by the infrared temperature sensor 40 and the temperature measuring unit 103, which operate in a non-contact manner, the arithmetic and control unit 105 calculates using the sugar content calibration equation stored in its own memory, The final sugar content is displayed on the screen of the display input unit 107 or is stored in the internal memory and transmitted to the computer through the external communication unit 106. [ Here, the operation control unit 105 is electrically connected to the temperature measuring unit 103, the light source driver 101, the power input unit 104, the external communication unit 106, and the display input unit 107.

Hereinafter, the light emitting portion 20 according to the present invention will be described with reference to FIGS. 2A and 2B.

The light emitting portion 20 includes a metal circuit substrate 21 on which a circuit pattern is formed with electrodes, a light emitting diode chip 22 arranged in a state of being electrically connected to the metal circuit substrate 210, An epoxy resin 24 which is filled in the cylindrical mold 23 and thermally cured, and a metal mold 23 which is formed on the rear surface of the metal circuit board 21, The transparent epoxy resin 24 completely hermetically protects the light emitting diode chip 22 from the external environment. The cylindrical mold 23 is fixed to the measurement head portion 10 And is fixed on the optical axis 4 to align the light emitting portion 20 with the measurement head portion 10. The heat dissipating plate 25 applies heat conductive cream to the back surface of the metal circuit board 21 and fixes it.

The light emitting diode chip 22 may be combined into a total of 36 light emitting diode chips 22 in an array of 6 rows and 6 columns as an embodiment and emits light in a superposed wide wavelength band of 700 nm to 950 nm. The light emitting diode chip 22 may be combined with six different central wavelengths. Specifically, it is operated by being connected to the circuit of the light source driving unit 103 by the positive electrode and negative electrode terminal of the metal circuit board 21, and if necessary, by changing the number and the central wavelength of the light emitting diode chips 22, 20 to determine the light intensity and the wavelength band.

Hereinafter, the light receiving / spectroscopic head unit 30 according to the present invention will be described with reference to FIG.

The light receiving / spectroscopic head unit 30 in the present invention is configured to integrally have the functions of the light receiving unit and the spectroscopic head unit. The light receiving / spectroscopic head unit 30 includes a hollow cylindrical lens fixing tube 34 fixed to one side of the body 30a, an aspherical lens 31 attached to an end of the lens barrel 34, a body mold 30a, An input slit 33 arranged in a straight line with the input window 32 on the inner side of the body mold 30a and a silicon substrate 30b on which the input slit 33 is formed A transparent glass circuit board 38 coupled to the lower surface of the silicon substrate 30b and having an electric circuit pattern formed thereon, an image sensor 37 disposed on the lower surface of the glass circuit board 38, A convex lens 35 in which a diffraction grating 36 is formed, and a lead frame 39 electrically connected to the glass circuit board 38. The input slit 33 is formed by etching and the silicon substrate 30b is fixed to the upper surface of the glass circuit board 38 by flip chip bonding. Here, the light receiving and focusing functions are performed through the lens barrel 34 and the aspherical lens 31, and the input slit 33, the image sensor 37, the glass circuit substrate 38, the convex lens 35, And serves as a function of the spectroscopic head unit through the lead frame 39. [

The light receiving / spectroscopic head unit 30 having the function of the spectroscopic head unit can be implemented by applying a microelectromechanical system technology and a nanoimprint technology capable of mass production of an ultra-compact product at low cost, Passive Optical Alignment process enables miniaturization, cost reduction and mass production.

The light emitted from the inside of the ship is condensed through the aspherical lens 31 and passes through the input slit 33. The light diffused in a limited size is transmitted through the convex lens 35 Diffracted by each wavelength in a diffraction grating 36 engraved on the surface of the image sensor 37 and converted into photocurrent at each pixel of the image sensor 37. And then connected to the circuit of the photodetector 101 through the lead frame 39 to operate.

Hereinafter, the characteristics of the wavelength spectrum in the desktop nondestructive testing apparatus 100 will be described with reference to FIG. The light emitting unit 20 is combined with the light emitting diode chip spectra 400 of six different center wavelengths to emit light of the light emission spectrum 300 of the overlapping wide wavelength band of about 700 nm to 950 nm. Referring to the horizontal axis of FIG. 4, the light receiving / spectroscopic head unit 30 of the present invention exhibits spectral response characteristics in the entire 588 nm to 1100 nm wavelength region.

The conventional halogen lamp spectrum 200 emits a relatively wide wavelength band along the 588 nm to 1100 nm wavelength band while the emission spectrum 300 according to the present invention shows the peak point at around 770 nm and 860 nm Able to know. In the case of using the sugar content meter 100 of the present invention, the light emitting diode chip 22 having a wavelength band that increases the dynamic range of absorbance and reacts with the sugar content of the measurement vessel is increased, And can be selectively combined. As a result, the light intensity in the wavelength band related to the sugar content of the boat can be selectively increased without using an unnecessary wavelength band region as in the case of a halogen lamp.

2. Operation structure of nondestructive apparatus

Next, referring to Figs. 5A to 5E, the operation structure of the desktop nondestructive testing apparatus 100 will be described.

The tabletop non-destructive testing apparatus 100 includes a main body case 60 in which a controller unit 110 is embedded and a measurement head unit 10 is fixed to the top, a display input unit 107 provided on the front surface of the main body case 60, And an operation switch 112 that is mounted in the housing 107.

When the manipulation switch 112 mounted on the display input unit 107 is pushed in such a manner that the center of the equator of the belly 5 is positioned at the center of the measurement head 10 of the sugar content meter 100, . At this time, an effect sound or a display lamp can be used to maintain the close contact with the ship 50 during the measurement.

The sugar content meter 100 displays measurement data through the liquid crystal display 111 in the display input unit 107 provided on the front surface of the body case 60 or displays the measurement data through the USB connector 90 of the external communication unit 106 Of a computer.

The operation switch 112 in the display input unit 107 includes a plurality of switches for selectively performing power supply and cut-off, additional functions for setting the kind and type of the object to be measured, the degree of sugar content, and the like.

On the other hand, a power input terminal 70, a power switch 80, and a USB connector 90 can be provided on the rear surface of the main body case 60.

As described above, the desktop nondestructive testing apparatus of the present invention can be miniaturized, lightweight, low power consumption, and low cost because of the configuration including the ultra-small spectroscopic head and the LED integrated module.

In addition, through the composition of the present invention, it is possible to implement a sugar content meter capable of moving regardless of the use place and use, and it can be easily utilized for various purposes in selection, storage, distribution and sale after harvest, In a similar manner.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the present invention can be changed.

1: ship line
2: abdominal cavity
3: Drainage Department
4:
5: times
10: Measurement head section
20:
21: metal circuit board
22: Light Emitting Diode Chip
23: Cylindrical mold
24: Epoxy resin
25: Heat sink
30: light receiving /
30a: Body mold
30b: silicon substrate
31: Aspherical lens
32: Input window
33: input slit
34: lens barrel for fixing the lens
35: convex lens
36: diffraction grating
37: Image sensor
38: glass circuit board
39: Lead frame
40: Infrared temperature sensor
50: elastic pad
60: Body case
70: Power switch
80: Power input terminal
90: USB connector
100: Brix meter
101: Light source driver
102:
103: Temperature measuring unit
104: Power input unit
105:
106: External communication unit
107: display input unit
110:
111: liquid crystal display
112: Operation switch
200; Halogen lamp spectrum
300: emission spectrum
400: Light Emitting Diode Spectrum

Claims (6)

Measuring head;
A light emitting unit disposed in the measurement head unit and configured to irradiate light onto a chain of objects to be measured;
A body case having a portion penetrated to support the measurement head portion to which the sugar content measurement object is attached;
A light receiving / spectroscopic head unit disposed in the measurement head unit while maintaining a predetermined distance from the light emitting unit and detecting light from the ship; And
And an elastic pad closely attached to the front of the measurement head part.
Nondestructive nondestructive testing apparatus for tablets.
The method according to claim 1,
And an intersection point of imaginary optical axes extending from the light emitting section and the light receiving /
Nondestructive nondestructive testing apparatus for tablets.
The method according to claim 1,
The sugar content measuring device comprises:
And an elastic pad disposed on the measurement head. The elastic pad has a shape in which a discharge port is in close contact with an inner side of optical axes of the light emitting unit, and a discharge port is in close contact with an outer side of the optical axis.
Nondestructive nondestructive testing apparatus for tablets.
The method according to claim 1,
Wherein the light emitting portion comprises a substrate, a light emitting diode chip arranged on the substrate, a cylindrical mold surrounding the light emitting diode chip, a resin filled in the cylindrical mold, and a heat sink fixedly arranged on a rear surface of the substrate.
Nondestructive nondestructive testing apparatus for tablets.
5. The method of claim 4,
Wherein the light emitting diode chips are combined at six different center wavelengths and emit light in a wavelength band of 700 nm to 950 nm.
Nondestructive nondestructive testing apparatus for tablets.
The method according to claim 1,
The light receiving / spectroscopic head unit includes a body, a hollow cylindrical lens fixing lens barrel fixed to the body, an aspheric lens attached to an end of the lens barrel, an input window formed on one side of the body, A glass substrate attached to a lower surface of the silicon substrate; a convex lens disposed under the glass substrate and engraved with a diffraction grating; And a lead frame electrically connected to the glass circuit board.
Nondestructive nondestructive testing apparatus for tablets.

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