KR20150033364A - Plant factory LED lighting system with controllable light source - Google Patents

Abstract

In the present invention, provided is an LED light system to control various light sources at a plant factory. In the LED light system to control various light sources of the plant factory, the LED light system comprises a plurality of LED light units which have a plurality of LED lights used as light for plants; an LED controller which controls the LED light unit; and a sunlight illumination controlling unit which detects at least one among values of CO_2, O_2, temperatures, brightness and colors and accordingly generates environmental information which is required conditions for growing plants.

Description

[0001] The present invention relates to an LED lighting system capable of controlling a light source,

The present invention relates to a plant factory LED lighting system capable of light source control.

A plant plant is a systematic agricultural form that can artificially control the growth environment of a plant and produce it as an industrial product.

Due to the recent serious climate change both at home and abroad, the necessity of introducing plant factories to secure stable food is greatly increased. Severe climate change is changing the temperature, precipitation, and solar irradiance, thus undermining the productivity of conventional cultivation methods. As a result, the need for a plant plant capable of growing plants stably throughout the year is attracting attention.

In addition to effectively responding to climate change, plant factories play an important role in reducing greenhouse gases and securing water resources. Water used in plant factories can be used as urban heavy water, and water vapor generated in plant factories can be collected and used as clean drinking water. In addition, carbon dioxide can be reduced by collecting external carbon dioxide and actively recycling it. In addition, plant factories can be installed in urban buildings, which can greatly improve productivity per unit area, reduce distribution costs, and maintain product freshness.

Research on such plant factories has started in Europe, and has been going through the US and Japan most actively. KUFFI Co., Ltd. of Japan has developed a plant factory 'TS-farm' to secure cost competitiveness. In this way, plant facilities are being expanded and distributed. Mirai's 'Green Flavor' plant is equipped with Panasonic fluorescent lamps We have opened stores all over the city to secure competitiveness. Mitsubishi Chemical has developed a new lighting system using LEDs and solar cells, and entered the plant business.

In the United States, the Columbia University School of Architecture, the University of Illinois, and the Mitton Building Office have begun to develop vertical plant factories that use high-rise buildings, dramatically increasing the yield per planted area by using renewable energy such as wind power and solar power, It has a yield of about 10 times that of outdoor farmland. In Korea, recognizing the need for commercialization, the government is making efforts to develop IT-LED, a core component of plant factories. As part of that effort, the government has selected 'IT-LED-based plant parts for IT-LED plant project' In Jeollabuk-do, Jeonbuk Province is carrying out plant plant projects to increase added value by integrating LED technology with agriculture, biology, food, and component materials. In Gwangju City, the green industry, which combines the strategic industry, , And vertical farm construction is underway in Namyangju City and Bucheon City.

However, in order to construct such a plant, expensive network installation, maintenance and repair costs are required, and it is difficult to expand the network due to expansion of plant cultivation area.

Therefore, there is a demand for plant plant systems that can install and expand plant plant systems at a lower cost and have higher energy efficiency.

Korea Patent No. 0879711 Korea Patent Publication No. 0944359 Korea Patent Publication No. 0959994

According to an embodiment of the present invention, an LED lighting system of a plant factory is constructed using a network, thereby making it possible to easily and economically install and expand the system. It can improve the performance of the network, and it can selectively supply only the wavelength range necessary for photosynthesis and growth according to the kinds of plants by using the LED controller and the LED lamp unit, thereby saving energy and controlling plant pigment, It is possible to maximize the control effect and to connect the Internet network and Zigbee arm by using the gateway, so that the manager can manage and monitor the environment of the plant factory without restriction of time and place through the management server and mobile terminal It will be possible to provide a plant factory LED lighting system.

In addition, according to an embodiment of the present invention, the illumination required for the growth of crops is formed by grouping LEDs of blue, red, and green having different wavelength ranges, and selecting a pair of groups in these groups The plant LED lighting system capable of controlling the operation of the LEDs so as to achieve the set power ratio and capable of controlling the light source to form the optimum growth condition under the condition that the growth of the crop is matched with the characteristics of the crops.

According to an embodiment of the present invention, the environment information data can be acquired through the solar light intensity control unit, and the LED light unit can be controlled based on the environmental information data, and LED lamps according to a predetermined unit structure can be arranged on the PCB substrate, The light intensity of the light receiving surface can be uniformly distributed by the light irradiation by the illumination, and the number of the LEDs can be reduced, thereby providing a plant factory LED illumination system capable of controlling the light source to economically operate the plant factory.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

An object of the present invention is to provide a plant factory LED lighting system, comprising: a plurality of LED lamp units including a plurality of LED lamps used as a plant illumination; An LED controller for controlling the LED lamp unit; A solar light intensity control unit for sensing at least one of CO2, O2, temperature, humidity, brightness value and color value to generate environmental information necessary for plant growth; A power meter for measuring power information consumed in the LED lighting system; A gateway for receiving the environment information and the power information; And a control server for receiving the environment information and the power information from the gateway and transmitting control data to the LED controller through the gateway, wherein the LED lamp unit comprises a main body having a PCB substrate, A plurality of LEDs having wavelength ranges different from each other and arranged in groups on a wavelength range and electrically connected to the LEDs, and a power ratio between the groups is input from the LED controller, And a power control module for controlling the operation of the groups such that the ratios are included in a preset power ratio range, the power control module comprising: a power supply for supplying power to each of the groups; A power check unit for checking power, and a power check unit for selecting the LEDs of the power supply unit and the groups of the groups And the LED controller is electrically connected to the power supply unit, the power check unit, and the switching unit, and when the power ratio between the groups is input, And controlling the operation of the groups by controlling the power supply unit and the switching unit such that a power ratio inputted by receiving the power is included in a preset power ratio range. have.

The LED group includes a first group consisting of a plurality of red LEDs having a wavelength range of 640 m to 670 nm, a second group consisting of a plurality of blue LEDs having a wavelength range of 440 nm to 470 nm, And a third group consisting of a plurality of green LEDs having a wavelength range of 540 nm to 540 nm.

The red LEDs and the green LEDs form a rectangular network structure, and the blue LEDs are arranged in a triangular pattern. The red LEDs, the blue LEDs, and the green LEDs are arranged at regular intervals, And is arranged to form a honeycomb network structure.

In addition, the solar irradiance control unit may include a photosensor for measuring the intensity of solar light reflected to the plant, a temperature sensor for measuring room temperature, a CO2 sensor for measuring indoor CO2 amount, and a height And a position sensor for measuring the position of the object.

A reference reflector installed in a plant plant and reflecting light incident from the LEDs; a wide angle reflector disposed on the plant in the cultivation space and having an image of a plant formed on the surface thereof; And a camera for acquiring a plant image formed on the wide angle reflector and measuring a ratio of the intensity of the light reflected by the reference reflector to the wavelength area.

As described above, according to an embodiment of the present invention, first, by constructing an LED lighting system of a plant factory using a network, installation and expansion of the system can be made easier and more economical, and the performance of the network can be further improved And it can maximize the effect of energy saving, plant pigment control, enhancement of antioxidant substances and pest control effect by selectively supplying only the wavelength region required for photosynthesis and growth according to the kinds of plants by using LED controller and LED lamp unit, By connecting the Internet network and the ZigBee arm using the gateway, the manager can manage and monitor the environment of the plant factory without restriction of time and place through the management server and the mobile terminal.

Secondly, the illumination required for the growth of the crop is grouped into blue, red, and green LEDs having different wavelength ranges, and a pair of groups is selected from these groups to operate the LEDs to achieve a predetermined power ratio The growth of the crop can be controlled to form an optimal growth condition under conditions matching the characteristics of the crop.

Third, it is possible to acquire environmental information data through the solar light intensity control unit and to control the LED light unit based on the environmental information data, and to arrange the LED light according to the predetermined unit structure on the PCB substrate, So that the number of LEDs can be reduced and the plant factory can be economically operated.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, those skilled in the art will readily appreciate that various other modifications and variations can be made without departing from the spirit and scope of the present invention.

1 is a block diagram illustrating a signal flow of a plant factory LED illumination system according to an embodiment of the present invention;
2 is a block diagram illustrating an operation of the LED lamp unit according to an embodiment of the present invention.
3 is a block diagram showing a configuration of a solar light intensity control unit according to an embodiment of the present invention;
4 is a layout diagram showing a unit structure of an LED unit according to an embodiment of the present invention,
FIG. 5 is a plan view of a PCB substrate formed by combining the unit structures of FIG. 4,
6 is a front view of a plant plant LED lighting system according to an embodiment of the present invention,
FIG. 7 is a front view of a plant factory LED lighting system in a state where the LED lamp unit is lowered according to an embodiment of the present invention;
8 is a cross-sectional view of an LED lamp according to an embodiment of the present invention,
9 is a plan view of a wide angle reflector according to an embodiment of the present invention,
10 is a side view of a wide angle reflector according to an embodiment of the present invention,
11 and 12 are perspective views of a wide angle reflector according to another embodiment of the present invention,
13 is a side view showing a wide angle reflector and a camera according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.

The configuration and function of the plant factory LED lighting system 100 according to an embodiment of the present invention will be described. A light source control structure and an internal structure of the illumination system 100 will be mainly described with respect to a plant factory LED illumination system 100 according to an embodiment of the present invention.

First, a plant factory LED lighting system 100 includes a plurality of LED lamp units 10 having a plurality of LED lamps 12 used as illumination for plants; An LED controller 30 for controlling the LED light unit 10; A solar light intensity control unit (40) which senses at least one of CO2, O2, temperature, humidity, brightness value and color value to generate environmental information necessary for plant growth; A power meter 50 for measuring power information consumed in the LED lighting system 100; A gateway (60) for receiving the environment information and the power information; And a management server 70 for receiving the environment information and the power information from the gateway 60 and transmitting control data to the LED controller 30 through the gateway 60. [

The LED lamp unit 10 includes a main body having a PCB substrate 11, a plurality of LEDs 10, which are mounted on the PCB substrate 11 in different wavelength ranges within the main body, And a power control module (LED) 30 for controlling the operation of the groups so that the input power ratio is included in the predetermined power ratio range when the power ratio between the groups is electrically input from the LED controller 30 20).

The power control module 20 includes a power supply unit 21 for supplying power to each of the groups, a power check unit 22 for checking power output from each of the groups, 21) and a switching unit (23) for selectively switching the LEDs of the groups.

The LED controller 30 is electrically connected to the power supply unit 21, the power check unit 22 and the switching unit 23. When the power ratio between the groups is input, And controls the operation of the groups by controlling the power supply unit 21 and the switching unit 23 such that the power ratio of the groups received from the power supply unit 22 is included in a predetermined power ratio range .

The plant plant LED lighting system 100 according to an embodiment of the present invention includes a frame 110 for providing a plant cultivation space; A cultivation box 120 disposed at a lower portion of the frame 110 to allow plants to be planted; An LED lamp unit 10 installed on the upper side of the cultivation box 120 to illuminate the plant with LED illumination; And an elevating member 150 for elevating and lowering the support base 140 on which the LED lamp unit 10 is fixed to adjust the distance between the LED illumination and the plant.

The LED lamp unit 10 includes a PCB substrate 11 to which a plurality of LEDs are attached, a lamp 12 attached to the PCB substrate 11 and having a curved upper surface for heat radiation, A cooling tube 15 inserted in the longitudinal direction of the lamp 12 and a plurality of radiating fins 14 provided on a curved surface of the lamp 12, And circulates to perform a cooling function.

<Light Source Control>

Hereinafter, a light source control structure in a plant plant LED lighting system 100 according to an embodiment of the present invention will be described. 1 is a block diagram illustrating a signal flow of a plant plant LED lighting system 100 according to an embodiment of the present invention.

The plant plant LED lighting system 100 according to an embodiment of the present invention is based on a Ubiquitous Sensor Network (USN). 1, a plant factory LED lighting system 100 includes an LED light unit 10, an LED controller 30, a gateway 60, a solar light intensity control unit 40, a power meter 50, A portable terminal, a management server 70, and the like.

The LED lamp unit 10 includes a plurality of LED lamps 12 used as illumination for plants, and may be installed in a plant factory. Each LED lamp 12 is capable of serial data input / output. The LED lamp unit 10 is composed of restored LEDs, and the plurality of LEDs can form a group and a channel, as described later, and this channel corresponds to the minimum unit controlled by the LED controller 30 . These groups and channels, as will be described later, may be configured as one group of red, blue, and green, according to one embodiment, and the LED light unit 10 may use it to select the wavelength Ratio can be controlled. The specific configuration, configuration, and arrangement of the LED lamps 12 included in the LED lamp section 10 will be described later in detail.

The LED controller 30 can transmit the color information of the LED lamp 12 to the LED lamp unit 10. [ The LED controller 30 includes a ZigBee wireless communication module (ZigBee RCM (Radio Communication Module)) and receives color information and control information wirelessly transmitted from an upper network such as the Internet through the ZigBee wireless communication module.

Also, the LED controller 30 controls the LED lamp unit 10 through the received control information. The LED controller 30 transmits the received color information to the LED lamp unit 10 and the LED lamp unit 10 generates a control signal of the LED lamp 12 based on the received color information, (12). At this time, the control signal includes a PWM (Pulse Width Modulation) period and a current value according to the type of the plant, and the brightness value according to the color of the LED lamp 12 can be controlled based on the period.

The LED lamp 12, which has received the control signal, transmits the control signal to the LED lamp 12 connected in series to the LED lamp 12. That is, the output signal of the LED lamp 12 receiving the control signal is serially connected to the input signal of the LED lamp 12. The plurality of LED lamps 12 can be controlled by one LED controller 30 by repeatedly connecting the LED lamps 12 in series.

The gateway 60 communicates with the LED controller 30, the solar light intensity control unit 40 and the power meter 50 by using the Zigbee wireless communication function, (70), it can serve as an interface between the ZigBee network and the Internet.

The solar light intensity control unit 40 generates environmental information necessary for plant growth by sensing Co2, O2, temperature, humidity, brightness value, color value, and the like. The environment information can be transmitted to the gateway 60 via the Zigbee wireless communication in the reporting period set by the administrator.

Also, the power meter 50 includes a CT sensor and a voltage divider circuit for measuring current, and measures the current applied to the LED lamp unit 10 via a SMPS (Switched 0 Mode Power Supply) Can be measured. Information on the power consumed can be transmitted to the gateway 60 through the ZigBee wireless communication in the reporting period set by the administrator.

As described later in detail, the camera 190 is used by a manager to observe the development status of a plant. The manager uses a portable terminal such as a smart phone or the like via a WiFi-AP installed in a plant factory, Can be observed from outside.

In addition, the management server 70 periodically receives environmental information from the gateway 60 installed in the plant factory or according to an administrator request. The management server 70 and the gateway 60 can transmit and receive synchronized data, and the management server 70 can manage the data received from the end node into a file and manage it on a daily basis. The management server 70 can be configured to directly monitor and control the data management server 70 connected to the Internet, as needed, locally.

2 is a block diagram illustrating an operation of the LED lamp unit 10 according to an embodiment of the present invention. As shown in FIG. 2, it can be seen that the LED lamp unit 10 can be configured by grouping a plurality of LED lamps 12, and can control power and be switched by group.

The LED lamp unit 10 includes a plurality of LED lamps 12 mounted on a PCB substrate 11 and a PCB substrate 11 having different wavelength ranges, And when the power ratio between the groups is electrically input from the LED controller 30, the operation of the groups is controlled so that the input power ratio is included in the preset power ratio range And a power control module (20).

The power control module 20 includes a power supply unit 21 for supplying power to each of the groups, a power check unit 22 for checking the power output from each of the groups, And a switching unit 23 for selectively switching LEDs of the respective groups.

The LED controller 30 is electrically connected to the power supply unit 21, the power check unit 22 and the switching unit 23. When the power ratio between the groups is input, 22 controls the power supply unit 21 and the switching unit 23 to control the operation of the groups so that the input power ratio is included in the predetermined power ratio range.

The PCB substrate 11 is formed into a plate having a predetermined length, and a plurality of LED lamps 12, which are light emitting devices, are mounted on the PCB substrate 11. The LED lamp 12 according to an embodiment of the present invention is composed of a red, blue and green LED lamp G and in particular a red LED lamp R having a wavelength range of 640 nm to 670 nm, In the case of blue LEDs, light emitting devices having a wavelength range of 440 nm to 470 nm are used, and in the case of green LED lamps (G), light emitting devices having a wavelength range of 510 nm to 540 nm are used.

Thus, according to an embodiment of the present invention, the red LED lamps R constitute the first group, the blue LED lamps B constitute the second group, and the green LED lamps G constitute the third group have. The arrangement of the LED lamps 12 according to each group will be described later in detail.

In an embodiment of the present invention, when the power ratio between the pair of the groups is input from the outside, the power control module 20 controls the operation of the groups so that the input power ratio is included in the predetermined power ratio range . This power control module 20 is as shown in FIG. A power supply unit 21, a power check unit 22, a switching unit 23, and an LED control unit for controlling them.

In more detail, the groups may be electrically connected to the power supply unit 21 to receive power respectively. That is, the first group is electrically connected to the first power supply unit to receive power, the second group is electrically connected to the second power supply unit to receive power, and the second group is electrically connected to the third power supply unit And can be supplied with power.

In addition, the LED lamps 12 of each of the groups can be supplied and cut off by the switching unit 23, which can selectively block the electrical path to the power supply unit 21. That is, the first group implements the switching of the electric path that is the power supply path by the first switching unit, the second group implements the switching of the electric path that is the power supply path by the second switching unit, Switching of an electric path that is a power supply path by the switching unit can be realized.

Each of the groups is electrically connected to a power check unit 22 capable of checking the power generated when the power is supplied and light is emitted. Thus, the power generated in each of the groups is checked by the power checker 22, and the checked power can be transmitted to the LED controller 30. The first group is electrically connected to the first power check unit, the second group is connected to the second power check unit, and the third group is connected to the third power check unit.

Accordingly, the LED controller 30 can receive the power of each group from each power check unit 22, and accordingly, the LED controller 30 is supplied with the power ratio for a group of the groups from the outside .

The LED controller 30 receives the power corresponding to the pair of groups from the power check unit 22 and calculates the power ratio. The LED controller 30 can control the operation of the groups by controlling the power supply unit 21 and the switching unit 23 such that the calculated power ratio is included in the predetermined power ratio range.

Here, the preset power ratio is set so that the first group and the second group have a ratio of 6: 1 to 12: 1, and the first group and the third group have a ratio of 2: 1 to 8: 1 . The LED controller 30 preferably stops the power supply to the excluded group using the power supply unit 21 so as to suspend the operation of the excluded group at the input power ratio.

3 is a block diagram showing the configuration of the solar irradiance control unit 40 according to an embodiment of the present invention. The photovoltaic power control unit 40 measures the intensity, temperature, CO2, O2, etc. of the sunlight reflected by the plant plant, and then transmits environment information for calculating the reference light demand of the plant- To be created. 3, the solar light intensity control unit 40 may include a sensor unit, a light intensity measurement controller 45, a wireless controller 46, and the like.

The sensor unit is measured by an optical sensor 41 for measuring the intensity of sunlight projected on the plant plant, a temperature sensor 42 for measuring the indoor temperature, and a CO2 measurement sensor 43 for measuring the indoor CO2 amount. As shown in the figure, the sensor unit includes an optical sensor 41, a temperature sensor 42, a CO 2 measurement sensor 43, an O 2 measurement sensor, and a position sensor 44.

The light sensor 41 is a cadmium sulfide cell (CDS), in which a metal bridge is attached to a cadmium sulfide crystal formed by the combination of cadmium and sulfur. In a dark place without visible light, current does not flow like an insulator, Since the current flows well like a face conductor, it has a high resistance value even in a dark place, and the internal resistance value of its own becomes lower as the light becomes brighter.

The temperature sensor 42 is installed on one side of the frame of the frame 110 or one side of the LED lighting system 100 to measure the temperature inside the greenhouse. This can be configured by selecting either a platinum resistance temperature sensor, a thermistor, or a semiconductor temperature sensor. The platinum resistance temperature sensor uses the principle that the resistance value of platinum changes according to the temperature. It is used as a standard temperature sensor in the range of -260 ~ 630 ℃ due to its high accuracy. The thermistor is made by sintering the metal oxide and is divided into the NTC thermistor and the PTC thermistor using the characteristic that the resistance varies with temperature.

The semiconductor temperature sensor uses this characteristic as the temperature sensor 42 because the forward voltage of the diode and the voltage between the base and the emitter when flowing a constant current between the collector and emitter of the transistor linearly change with temperature. The measured temperature inside the plant is inputted to one side of the input terminal of the microcomputer.

The CO2 measurement sensor (43) is a sensor for measuring the amount of indoor CO2 in the plant, and measures the carbon dioxide emitted from the plant-grown crop. CO2 gas is essential for photosynthesis, and the proper concentration of CO2 gas depends on environmental conditions such as kind of crop, growth stage, luminous intensity and moisture.

The position sensor 44 is installed on one side of the crop plant for plant plant, and measures the height according to the development of the plant cultivated crop and transfers it to the microcomputer, which is based on light (visible ray, infrared ray or laser) and ultrasonic wave. The two basic methods of measurement are triangulation, which illuminates an object with a single ray that creates a point on the object. One point is configured as a camera 190 or a receiver such as a phototransistor.

The dimming measurement controller 45 measures a plurality of optical sensors 41 and sends environmental information including the measured solar light intensity to the gateway 60. The dimming measurement controller 45 is driven by receiving a DC 12V voltage, A relay control signal is received from the gateway 60, and the plurality of optical sensors 41 installed in the plant are sequentially measured and stored, and then output to the gateway 60. The light intensity measuring controller 45 may include a power source, a sensor input unit, and a sensor output unit. The power supply unit is supplied with DC12V voltage and supplies power to each device. The sensor input unit is connected to the sensor unit and receives intensity data of sunlight measured from the optical sensor 41, temperature data measured from the temperature sensor 42, and the like. The sensor output unit outputs the environmental information to the gateway 60.

The wireless controller 46 connects the gateway 60 and the solar light control unit 40 through radio frequency (RF) radio communications and the gateway 60, which receives the environment information, 50 to the management server 70. The management server 70 determines whether or not the data including the light demand amount, growth temperature, humidity, light emission period, wavelength, etc. necessary for the cultivated crop And causes control data to be transmitted to the LED controller 30 through the gateway 60. [

Hereinafter, the arrangement state of a plurality of LED lamps 12 attached to the PCB substrate 11 will be described. 4 is a plan view showing a unit structure of an LED according to an embodiment of the present invention. FIG. 5 is a plan view of the PCB substrate 11 formed by combining the unit structures of FIG.

As shown in Fig. 4, the unit structure includes red LED lamps (R), blue LED lamps (B), and green LED lamps (G). The LED lamps 12 are arranged at regular intervals in a unit structure composed of a red LED lamp R, a blue LED lamp B and a green LED lamp G on the PCB substrate 11. In an embodiment of the present invention, the rectangle may be arranged in a rectangle and the triangle may be arranged in an equilateral triangle.

The unit structure can be composed of four red LED lamps (R), blue LED lamps (B), and green LED lamps (G) of four, three, and one, respectively. The unit structure is placed in the center of the four red LED lamps (R), two of the blue LED lamps (B) are placed on opposite sides of the rectangle by the red LED lamps (R) And the other one of the blue LED lamps B may be arranged outside the quadrangle and include a green LED lamp G inside the triangle.

In one embodiment of the present invention, the unit structure is a rectangle having a length of 2 * D on one side and a length of 4 * L on the other side, and nine internal intersections are divided equally into 16 rectangles. Four red LED lamps (R) are arranged at each corner of a rectangle having a length D of one side and a length 2L of the other side formed by intersections inside the center enclosing the center G, Three blue LED lamps (B) can be placed on each corner of an equilateral triangle of 2 * L, with one side of the equilateral triangle being parallel to the rectangle and containing a green triangle LED lamp (G). Such a rectangle may also be a square with D = @ * L.

5, the red LED lamp R and the green LED lamp G are arranged in a rectangular pattern net shape as shown in FIG. 5, , And the blue LED lamp (B) is arranged in a triangular pattern honeycomb structure. The light intensity of the light receiving surface can be uniformly distributed by the light irradiation by the artificial illumination according to the unit structure and the number of the LED lamps 12 required for the light receiving surface can be reduced.

<Internal Structure of Lighting System 100>

Hereinafter, an internal structure of a plant plant LED lighting system 100 according to an embodiment of the present invention will be described. 6 is a front view of a plant plant LED lighting system 100 according to an embodiment of the present invention.

In an embodiment of the present invention, a plant factory LED lighting system 100 includes a frame 110 for providing a plant cultivation space; A cultivation box 120 disposed at a lower portion of the frame 110 to allow plants to be planted; An LED lamp unit 10 installed on the upper side of the cultivation box 120 to illuminate the plant with LED illumination; And an elevating member 150 for elevating the support base 140 in which the LED lamp unit 10 is fixedly installed upward and downward to adjust the distance between the LED illumination and the plant.

The LED lamp unit 10 includes a PCB substrate 11 to which a plurality of LEDs are attached, a lamp 12 attached to the PCB substrate 11 and having a curved upper surface to perform heat radiation, A cooling tube 15 inserted in the longitudinal direction of the lamp 12 and a plurality of radiating fins 14 provided on the curved surface of the lamp 12, So that cooling action is performed.

The frame 110 includes a rectangular frame 110 connecting the upper and lower horizontal frames 112 and 112 and the vertical frame 111 so that the plant 110 can be cultivated in a cultivating space . The cultivating box 120 is installed in an upper surface receiving plate of a lower horizontal frame 112 'of the frame 110 so that the cultivating box 120 can be used by selecting hydroponic or soil according to plants.

The LED lamp unit 10 includes a PCB substrate 11 on which a plurality of LED lamps 12 are mounted and a PCB substrate 11 on which heat radiation is performed and the upper surface is formed as a curved surface, A lamp 12 into which the tube 15 is inserted and a reflection plate 16 for reflecting the light emitted from the LED lamp 12.

The lamps 12 provided with the PCB substrate 11 are arranged at a predetermined interval on the support table 140 and the reflector 16 is installed at a certain distance from the lamps 12, It is installed so as not to disturb.

7 is a front view of a plant factory LED lighting system 100 in a state where the LED lamp unit 10 is lowered according to an embodiment of the present invention. A vertical conveying guide 152 having a conveying roller 151 is installed at each corner of a supporting table 140 on which the LED lamp unit 10 is fixed to form a vertical frame 111 of the frame 110, The wire rope 154 is connected with the hook 153 on the center line of the supporter 140 so that the wire loops 154 are connected to the upper and the lower horizontal frames 112, Is wound around a take-up roll 158 of a rope take-up device 157 provided at one end of a lower horizontal frame 112 'through guide rollers 155 and 156. The rope take- Up and down direction.

The rope winding device 157 is provided with a speed reducer and an operation handle 159 provided on one side so that the winding operation of the rope 154 is performed by means of the normal and reverse rotation by the operation handle 159, So that the winding operation can be performed by the control switch.

8 is a cross-sectional view of an LED lamp unit 10 according to an embodiment of the present invention. As shown in FIG. 8, the upper surface of the lamp 12 of the LED lamp unit 10 is formed as a curved surface so that the surface area of the upper surface of the lamp 12 is widened so that the heat radiation function is efficient. ) Can be formed to maximize the heat radiating action.

The rotary shaft is inserted in the longitudinal direction of the lamp 12 so that the entire LED lamp unit 10 including the lamp 12 is rotated on the basis of the rotation axis by the angle adjusting means 160, The angle can be adjusted.

The electric lamp 12 includes a cooling tube 15 on which water can flow and an attachment surface formed on one side of the outer surface of the cooling tube 15 so that the PCB substrate 11 can be adhered to the cooling tube 15 And a fixing support piece for fixing the lamp 12 to the support table 140 is provided on the outer surface of the support base 140. [

The cooling tube 15 of the lamp 12 is connected to one side of the thermal hose through a hose connection port 130 and the other side of the connection hose 132 is connected to a branching device 131 And the water pipe 161 is connected to an external water supply pipe so that water can be supplied and circulated to the cooling pipe 15 by a pump or the like and the water pipe 161 is connected to the support pipe 140 So that the external water supply pipe connected to the external water supply pipe 161 is connected so as not to interfere with the lifting operation.

In addition, although the planting space including the cultivation box 120 and the LED lamp unit 10 is provided in one stage in the frame 110 according to the embodiment of the present invention, It is possible to provide a plant arrangement space arranged in a multi-stage manner.

7 and 8, the reference reflector 170, the wide angle reflector 180, and the camera 190 are installed in the planting space of the plant factory LED lighting system 100 according to an embodiment of the present invention. .

A reference reflector 170 is disposed between plants in the growing space and reflects light by the LED light 12. The reference reflector 170 is divided into a plurality of regions, and each region is coated with a color filter that selectively reflects different wavelength regions. The color filter can be coated by a method of depositing a material that selectively reflects the wavelength region. For example, using a reflector plate coated with a block color filter that only reflects wavelengths in the 450 ± 10 nm wavelength range and a red color filter that only reflects wavelengths in the 655 ± 10 wavelength range, From this, the intensity of the light irradiated from the red LED lamp (R) and the blue LED lamp (B) can be known. It is possible to analyze whether these ratios are within a ratio for obtaining an optimized spectral distribution.

In addition, the wide angle reflector 180 is disposed at the upper part of the cultivation space for widening the range of the cultivation space through which the image can be obtained through the camera 190. FIG. 9 is a plan view of the wide angle reflector 180 according to an embodiment of the present invention, and FIG. 10 is a side view of the wide angle reflector 180 according to an embodiment of the present invention.

As shown in Figs. 9 and 10, the surface of the wide angle reflector 180 is a convex mirror surface that is radially symmetric. As shown in Fig. 9, an image of a plant in a wide circular area located under the wide angle reflector 180 is formed on this surface. It is a phenomenon similar to the phenomenon of image formation on the surface of a sparkling ball among Christmas ornaments. The camera 190 is disposed under the wide angle reflector 180 to take an image of the plant formed on the wide angle reflector 180. [ The image of the plant formed on the wide-angle reflector 180 is distorted, and correction is required to convert it into the form of a plant that is actually observed with the naked eye.

11 and 12 are perspective views of a wide angle reflector 180 according to another embodiment of the present invention. As shown in FIG. 11, the surface of the golf ball may be formed by forming the surface-bottomed dimples 181 on the surface of the wide-angle reflector 180, A wide angle reflector 180 combining several mirror surfaces inclined at an angle may be used. The image of the plant placed in the area far from the center is formed on the mirror plane having the largest inclination angle disposed at the edge, and the image of the plant arranged in the center is formed on the mirror plane having the small inclination angle arranged in the center .

13 is a side view showing the wide angle reflector 180 and the camera 190 according to another embodiment of the present invention. As shown in FIG. 13, a wide angle reflector 180 having a plurality of mirror surfaces coupled thereto may be provided, and a camera 190 may be disposed on a side of the wide angle reflector 180 so as to photograph an image of the plant.

The camera 190 uses a charge coupled device (CCD) or a complementary metal semiconductor (CMOS) light receiving element and red (R), green (G) and blue (B) And is attached to measure the amount of light of R, G, and B. In the present invention, the function of obtaining the image of the plant formed on the surface of the wide angle reflector 180, the function of measuring the spectral distribution of the light reflected by the reference reflector 170, and the function of measuring the intensity change of the long wavelength light .

The light incident on the LED lamp 12 is selectively reflected by the reference reflection plate 170 and then reflected by the wide angle reflection plate 180 to be reflected by the R, G, and B filters of the camera 190 And then enters the light receiving element. The intensity of the light incident on the light receiving element by the wavelength region is measured. For example, light reflected from a blue color filter that only reflects wavelengths in the wavelength range of 450 + - 10 nm is measured through the B filter of the camera 190, and a red color that reflects only wavelengths in the 655 + The light reflected from the color filter is measured through the R filter of the camera 190.

Further, the blue color filter of the reflection plate reflects only the wavelength region of 450 ± 10 nm, while the blue filter of the camera 190 passes the wavelength region of 400 to 550 nm. Therefore, by attaching the color filter to the reference reflection plate 170, it is possible to more accurately measure the intensity of the wavelength region to be measured. That is, if the reference reflector 170 is not used, the light in the wavelength range of 400 to 550 nm is recognized as blue in the camera 190, but if the reference reflector 170 is used, Only light in the area is recognized as blue.

The image of the plant obtained by the camera 190 has a great difference in color from the image obtained when photographing plants under sunlight and white light. The reason plants look green is because plants absorb blue and red light, and green light reflects. Plant plants are not used for plant growth, so unnecessary green light is minimized, and only blue and red light required for plant growth are irradiated. Therefore, the color of the plant obtained by the camera 190 of the plant may be blue or red rather than dark green, and changes with the change of the spectral distribution of light emitted from the light source.

Therefore, in order to grasp the growth state of the plant through the image of the plant acquired by the camera 190, the image of the plant should be corrected in consideration of the spectral distribution of the light emitted from the LED lamp 12.

The LED controller calculates the spectral distribution of the light being irradiated to the current cultivation space by using the intensity data of the light of each wavelength region measured by the camera 190 to measure the red LED lamp (R), the blue LED lamp (B) LED light (G) Turn off the power supply of some parts, or adjust the time of power supply, so that the light of the spectral distribution optimized for plant growth is irradiated in the cultivation space.

In addition, it plays a role of correcting the image of the plant obtained by using the ratio of the intensity of the irradiated light with the wavelength region to the image when the white light is irradiated. An example of a method of correcting is as follows. The object to be measured is white and the incident light by the LED lamp 12 is irradiated at a ratio of R: G: B = 8: 1: 3 and the image obtained by the camera 190 is R: G: B = 4: 0.5 : 1.5, the object to be measured is recognized as red. However, if the incident light is corrected to white light by applying the ratio of incident light R: G: B = 8: 1: 3, an image of a white measurement object having R: G: B = 0.5: 0.5: 0.5 is obtained. Through this correction, the image of the plant in white light can be obtained. Hereinafter, an image under such white light is referred to as a real image.

It is possible to visually judge the growth state of the plant in real time through the sensed image thus obtained and confirm the necessity of the maintenance and the confirmation of the harvesting time easily without entering the cultivation area. Can be changed. For example, at the initial stage of plant growth, the harvest time can be accelerated by irradiating the red LED lamp (R) with a high light intensity to elongate the plant and converting it into light containing less red light at the maturity stage. In addition, in the case of a plant in which the color of the leaf changes from green to red during growth, if the color change is confirmed through the real image, the amount of irradiation before the red LED can be reduced. Especially, it is effective when cultivating multi-species or cultivating different crops at the same time.

The management server 70 receives the data measured by the camera 190 through the gateway 60 and calculates the intensity of the long wavelength from the intensity ratio data of the wavelength region of the incident light obtained by the camera 190, The growth state of the plant can be confirmed by comparing the intensity of the long wavelength of the incident light reflected by the reflection plate 170 with the intensity of the chlorophyll fluorescence or the long wavelength obtained from the image of the plant. For example, fluorescence emitted from chlorophyll is part of the light energy that is not used in the initial photochemical reaction of photosynthesis, which is then emitted back to the light. Fluorescence is an abandoned energy, but fluorescence is useless to plants. Fluorescence increases when the photochemical reaction decreases, while complementation decreases when the photochemical reaction decreases. Therefore, fluorescence can be measured and analyzed through long wavelengths (810 to 830 nm) The change in the structure and function of the photosynthesis mechanism can be sensitively detected. However, since the camera 190 is equipped with an RGB filter, the light of a long wavelength should be cut off in principle, but it is not actually completely blocked. In addition, if necessary, a light window may be provided with a transparent window to allow light of a long wavelength to pass therethrough.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. It is to be understood that such modified embodiments are within the scope of protection of the present invention as defined by the appended claims.

10: LED light section
11: PCB substrate
12: LED light
13:
14: Radiating pin
15: cooling tube
16: Reflector
20: Power control module
21: Power supply
22: Power check section
23:
30: LED controller
40: Solar light intensity control unit
41: Light sensor
42: Temperature sensor
43: CO2 measurement sensor
44: Position sensor
45: dimming measurement controller
46: Wireless controller
50: Power meter
60: Gateway
70: management server
100: LED lighting system
110:
111: vertical frame
112: upper horizontal frame
112`: Lower horizontal frame
120: Cultivation box
130: Hose connector
131: minute mechanism
132: Connection hose
140: Support
150:
151: Feed roller
152: Vertical transport guide
153: The hook
154: Wire rope
155: first guide roller
156: second guide roller
157: rope winding device
158: Winding roll
159: Operation handle
160: Angle adjusting means
161: By the water pipe
170: Reference reflector
180: Wide angle reflector
181: dimple
190: camera

Claims (5)

In a plant plant LED lighting system,
A plurality of LED lamp units having a plurality of LED lamps used as illumination of a plant;
An LED controller for controlling the LED lamp unit;
A solar light intensity control unit for sensing at least one of CO2, O2, temperature, humidity, brightness value and color value to generate environmental information necessary for plant growth;
A power meter for measuring power information consumed in the LED lighting system;
A gateway for receiving the environment information and the power information;
And a management server for receiving the environment information and the power information from the gateway and transmitting control data to the LED controller through the gateway,
The LED lamp unit includes:
A main body having a PCB substrate, a plurality of LEDs having different wavelength ranges within the main body and grouped in a wavelength range and mounted on the PCB substrate, and a plurality of LEDs electrically connected to the LEDs, And a power control module that, when input from the LED controller, controls operation of the groups so that an input power ratio is included in a predetermined power ratio range,
The power control module includes:
A power check unit for checking power output from each of the groups; and a switching unit for selectively switching the LEDs of the power supply unit and the groups of the groups,
Wherein the LED controller comprises:
Wherein the power control unit is electrically connected to the power supply unit, the power check unit, and the switching unit. When the power ratio between the groups is input, Wherein the control unit controls the power supply unit and the switching unit to control the operation of the groups.
The method according to claim 1,
The LED group,
A first group consisting of a plurality of red LEDs having a wavelength range of 640 m to 670 nm and a second group consisting of a plurality of blue LEDs having a wavelength range of 440 nm to 470 nm and a second group having a wavelength range of 510 nm to 540 nm And a third group consisting of a plurality of green LEDs.
3. The method of claim 2,
Wherein the red LEDs and the green LEDs form a network structure of a square pattern, and the blue LEDs are arranged in a triangular pattern honeycomb structure, Wherein the LED lighting system is arranged to form a network structure.
The method according to claim 1,
The solar light intensity control unit,
An optical sensor for measuring the intensity of sunlight reflected in a plant plant, a temperature sensor for measuring indoor temperature, a CO2 measurement sensor for measuring indoor CO2 amount, and a position sensor for measuring height according to development of a crop plant cultivating plant Features a plant factory LED lighting system with light control.
The method according to claim 1,
A reference reflector installed in the plant plant and reflecting light incident from the LEDs; a wide angle reflector disposed on the plant in the cultivation space and having an image of a plant formed on the surface thereof; And a camera for obtaining a plant image formed on the wide angle reflector and measuring a ratio of intensity of the light reflected by the reference reflector to a wavelength area of the reference reflector.

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