JP6091927B2 - Auxiliary light system - Google Patents

Description

  The present invention relates to a supplementary light system for irradiating light to a plant covered with a covering member.

  As one of the methods for cultivating agricultural crops, cover cultivation (shading cultivation) is known in which cultivation is performed while blocking direct sunlight. For example, in the cultivation of tea, in order to improve the quality of tea, which is a processed product, the tea tree is covered with a covering material (light-shielding material), and sunlight is blocked for a certain period.

  The type of tea varies depending on the covering period, for example, it is 30 days for tea, which is the raw material for matcha, 20 days for gyokuro, and 7 days for kabusecha. Moreover, not only the covering period but also the light shielding ratio varies depending on the type of tea. As an example, for example, in the case of Kabusecha, it is coated for about 7 days with a light shielding rate of about 55 to 80%, and in the case of Gyokuro and strawberry tea, it is first coated for about 10 days with a light shielding rate of about 55 to 80%, and then coated material The light shielding rate is increased to 90% or more, for example, about 95 to 98%.

  When the sun is blocked by cover cultivation, the rate of chlorophyll decomposition decreases and the tea tree becomes dark green and the tea leaves become thin and soft. In addition, the activity of the enzyme decreases, and the synthesis of catechins such as tannin from theanine (glutamic acid ethylamide) is suppressed.

  The umami components of tea are mainly amino acids such as theanine, glutamic acid, and arginine. Among them, theanine is a representative component. Theanine is produced in the roots of tea trees and transferred to shoots and accumulated. When theanine accumulated in the shoots is converted into catechins by biosynthesis, the accumulated amount of theanine decreases and the content of catechins increases. Catechions such as tannin are astringent components of tea.

  For this reason, limiting the amount of sunlight that reaches the tea leaves by coating at the early stage of shoots can increase the amino acid content of the tea, producing less tea, less appearance and flavor, and producing high-quality tea. it can.

  However, if there is a lot of cloudy or rainy weather during the coating period, the coating effect is suppressed and the quality improvement effect is reduced. As described above, the covering period of the tea is short. However, since the quality of tea varies depending on the weather during this short covering period, profits are not stable, which is a burden on tea farmers.

  In Patent Document 1, as a method of increasing the accumulation amount of free amino acids including theanine while suppressing the production of tea catechins, by irradiating light with an illuminance of an average of 100 lx or less to a tea tree at night, A method of activating a tea tree that performs photosynthesis is disclosed.

  Patent Documents 2 to 7 focus on the fact that the environment of sunlight has two elements such as brightness such as illuminance and spectrum balance, and propose that supplementary light is performed from the viewpoint of spectrum balance. .

  Patent document 2 pays attention to the spectral balance of visible light of sunlight, and red light (R light) and blue light (B light) are blended in a well-balanced manner for the healthy growth of plants. Desirably, as the growth of plants is promoted by amplifying a wavelength having a large photosynthetic capacity, at least one of R light, B light, and far-red light (FR light) is used in a solar-powered cultivation house. It has been proposed that light including one type is supplemented so that both the ratio of R light / B light of transmitted sunlight and the ratio of R light / FR light are reduced.

  In Patent Document 3, the mixed light of FR light, R light, and B light is applied to a plant in a time zone where sunlight is not irradiated, and the irradiance of the FR light is equal to or higher than each irradiance of the R light and B light. Propose to irradiate.

  Patent Document 4 proposes supplementing long-day plants with only FR light at night.

  In Patent Literature 5, in the cultivation of leafy vegetables under low sunshine conditions with a chief, the FR light is reduced in the daytime by using a far red light cut film as a covering material, or in a completely artificial light type cultivation facility In the cultivation of leafy vegetables, in the time zone corresponding to daytime, among the light having a wavelength longer than 700 nm, illumination light that does not contain or reduces far-red light having a wavelength of at least 700 to 800 nm is irradiated and corresponds to nighttime. It is proposed to irradiate B light during the time period.

  Patent Document 6 discloses white light emission so that the amount of light emission energy in the wavelength region of 600 to 700 nm and the amount of light emission energy in the wavelength region of 500 to 600 nm are within a predetermined range with respect to the total amount of radiant energy of irradiated light. It has been proposed to irradiate two types of light using a diode and a red light emitting diode as a light source.

  Further, Patent Document 7 measures the intensity of light in the wavelength region involved in the photochemical system of photosynthesis among the light emitted from the sun, and based on the result of comparing the intensity with a preset intensity of light. The proposal proposes to reduce the cost required for supplementary light by performing the minimum amount of supplemental light necessary for promoting photosynthesis in plants.

JP 2010-279295 A (released on December 16, 2010) JP 2007-2222039 A (published September 6, 2007) JP 2011-101616 A (published May 26, 2011) JP 2005-95132 A (published April 14, 2005) JP 2006-340689 A (published on December 21, 2006) Japanese Patent No. 5102190 (registered on October 5, 2012) JP-A-6-209654 (published on August 2, 1994)

  However, the reaction varies depending on the plant species, and the supplementary light conditions vary depending on the literature, and good effects are not always obtained under the above conditions. In actual operation, the selection range is too wide and it is difficult to determine the target value of supplementary light.

  Further, Patent Document 1 increases the amount of free amino acids accumulated by pre-activating the tea tree, and is not related to the weather itself during the covering period. In addition, Patent Documents 3 to 5 perform supplementary light at night as in Patent Document 1.

  In addition, in patent documents 2, 6, 7 and patent document 5, when cultivating leafy vegetables in a completely artificial light type cultivation facility, it is disclosed that supplementary light is provided during the daytime, but in fine weather Since the amount of light is large, the amount of complementary light is also large, and the running cost is enormous.

  The present invention has been made in view of the above problems, and its purpose is to bring the light spectrum in the daytime other than during fine weather to close to the light spectrum in the daytime in fine weather at the time of covering cultivation, so The purpose is to reduce the fluctuation width and to reduce the complementary light amount.

  In order to solve the above-described problem, a light supplement system according to one embodiment of the present invention includes a plant covered with a covering member, a day covered with the covering member, during a day other than a fine day, and a day on a fine day. A supplementary light system for irradiating light in a predetermined wavelength region set in advance in a wavelength region in which the amount of light is insufficient with respect to the inside, wherein the light in the predetermined wavelength region is applied to a plant covered with the covering member , A first wavelength component measuring means for measuring the wavelength component of the light irradiated to the plant through the covering member, and a target wavelength component from the wavelength component of the daytime light in fine weather And the amount of light in the predetermined wavelength region under the covering by the covering member, and the amount of light in the predetermined wavelength region in the wavelength component measured by the first wavelength component measuring means. Depending on the comparison result And a light amount control means for controlling the amount of light emitted from the optical unit.

  According to one aspect of the present invention, the light supplementary means emits light in accordance with a comparison result comparing the light amount of the predetermined wavelength region in the wavelength component measured by the first wavelength component measuring means. By controlling the amount of light that is emitted, it is possible to compensate for the amount of light in a wavelength region where the amount of light is insufficient during the daytime other than during fine weather.

  This makes it possible to bring the daytime wavelength component other than during fine weather closer to the daytime wavelength component during fine weather, reduce the fluctuation width of the cultivation conditions due to the weather, and suppress variations in the quality of the plant that is the harvest. Can do.

  In addition, since the supplementary light is performed with the target in the daytime under the cover and other than when the weather is fine, the total amount of light is small, and the amount of supplementary light can be reduced.

It is a block diagram which shows schematic structure of the principal part of the light supplement system concerning Embodiment 1. FIG. It is a schematic diagram which shows schematic structure of the principal part of the light supplement system concerning Embodiment 1. FIG. It is a graph which shows the contrast of the light spectrum in the daytime at the time of fine weather, and the light spectrum of the daytime at the time of cloudy weather, and the light quantity of the supplementary light component in the daytime at the time of cloudy weather. 3 is a flowchart illustrating a flow of supplementary light processing in the supplementary light system according to the first embodiment. It is a block diagram which shows schematic structure of the principal part of the auxiliary light system concerning Embodiment 2. FIG. It is a schematic diagram which shows schematic structure of the principal part of the supplementary light system concerning Embodiment 2. 10 is a flowchart illustrating a flow of supplementary light processing in the supplementary light system according to the second exemplary embodiment. It is a schematic diagram which shows schematic structure of the principal part of the supplementary light system concerning Embodiment 3. It is a schematic diagram which shows schematic structure of the principal part of the supplementary light system concerning Embodiment 4. It is another schematic diagram which shows schematic structure of the principal part of the supplementary light system concerning Embodiment 4. It is a schematic diagram which shows the mode of the supplementary light processing by the supplementary light system concerning Embodiment 4. FIG. It is a schematic diagram which shows schematic structure of the principal part of the supplementary light system concerning Embodiment 5. (A) * (b) is a graph explaining the method to measure the light quantity of FR light with the light quantity measuring device concerning Embodiment 5, (a) shows the wavelength component before filtering, (b) is The wavelength component after filtering is shown. (A) is a graph which shows the wavelength component when it passes the filter for PPFD measurement, (b) is a graph which shows the wavelength component when it passes the filter for FR light measurement, ( c) is a graph showing wavelength components when passing through a filter for measuring R light.

  Hereinafter, embodiments of the present invention will be described in detail.

Embodiment 1
In one embodiment of the present invention, it will be described below with reference to FIGS.

  The supplementary light system according to the present embodiment is a supplementary light system that is used for covering cultivation of plants that are cultivated by covering a plant with a covering material.

  Hereinafter, in the present embodiment, the case where covering cultivation (shading cultivation) of tea is performed will be described as an example, but the present embodiment is not limited to this.

  As described above, in the cultivation of tea, in order to improve the quality of the processed tea, there is so-called covered cultivation (shading cultivation) in which the incident rate of external light is limited to a predetermined incident rate by the covering material. Done. The external light transmittance (incidence rate) or light shielding rate by the covering material is appropriately set according to the type, location (production area), production time, etc. of the tea to be produced, and is particularly limited. It is not a thing.

  When covering cultivation is performed, the amino acid content of tea such as theanine is increased and tea quality (taste) is improved. For this reason, in the cultivation of the tea, the cultivation of the tea is performed in a state where the tea is covered with the covering material. In the cultivation of tea, the covering period and the light shielding rate are appropriately determined according to the type of tea that is a processed product.

  However, if there is little clear sky (for example, there is much cloudy weather) during the coating period, the effect of the coating is suppressed and the quality improvement effect is reduced.

  FIG. 3 is a graph showing the contrast between the daytime light spectrum (wavelength component) during sunny weather and the daytime light spectrum during cloudy weather, and the amount of light of the daytime supplementary light component during cloudy weather. In addition, all FIG. 3 has shown the optical spectrum under coating.

  As can be seen from FIG. 3, during cloudy weather, the ratio of red light (R light, 600 nm to 700 nm) and far red light (FR light, 700 nm to 800 nm), which are long wavelength components of 600 nm to 800 nm, in the sunlight Decrease.

  Therefore, it is thought that the fall of these long wavelength components contributes to the quality improvement effect of covering cultivation decreasing.

<Experimental example>
Therefore, in order to confirm the supplementary light effect by supplementing the long wavelength component which is insufficient in cloudy and rainy weather, a supplementary light experiment was actually conducted in the tea field (outdoor). The results of this supplementary light experiment will be described below.

(Experimental conditions)
In addition, this experiment is for observing the effect by the supplementary light of the long wavelength component, and in order to simplify the experimental condition and the experimental equipment, only the FR light is supplemented and the FR light is irradiated even in fine weather. .

  For the experiment, No. 2 tea was used, and from the 4th July to the 10th July, the FR trees were supplemented to the tea trees in the experimental zone under the cover only during the daytime. In addition, an open-air cultivation area having the same conditions as the experimental area except for not covering and supplementing light was provided as a reference area, and a covered cultivation area having the same conditions as the experimental area except for no light supplementation was provided as a control area. In addition, the solar radiation time during the experiment period was an average of 3 to 4 hours per day.

  The ratio of FR light to PPFD in the experimental section was 43%. During the experimental period, the ratio of FR light to PPFD in fine weather in each section was 37%, and the ratio of FR light to PPFD in cloudy weather when not supplemented was 31%.

PPFD is a photosynthetic effective photon flux density (unit: μmol · m ⁻² · s ⁻¹ ), and indicates a photon flux density in a wavelength region from 400 to 700 nm as shown in FIG.

(Experimental result)
The results of the supplementary light experiment are shown in Table 1.

  As described above, the average sunshine duration was 3 to 4 hours during the experiment period, and there was more cloudy sky, and the experimental section supplemented with FR light had a higher content of theanine in the tea leaves. As described above, theanine is an amino acid that has a high correlation between its content and tea quality.

  From the results shown in Table 1, it can be seen that when there is a lot of cloudy and rainy weather, it is possible to improve the tea quality or maintain the tea quality in fine weather by supplementing the FR light under the covering (light shielding) during the day. .

  Therefore, although the direct mechanism is unknown, it was confirmed from the above results that the decrease in the long wavelength component during the day other than the time of fine weather contributes to the reduction in the quality improvement effect of the cover cultivation.

  From this, by making the daytime light spectrum in cloudy or rainy weather (that is, other than fine weather) close to the daytime spectrum in fine weather, the fluctuation range of the cultivation conditions due to the weather is reduced, and it is a harvested product. It can be seen that the variation in tea quality can be suppressed, while the complementary light amount can be reduced.

  Therefore, in this embodiment, an approach is taken to bring the daytime cultivation conditions other than during fine weather closer to the daytime cultivation conditions during fine weather. Hereinafter, for the sake of simplification, the weather other than during fine weather is referred to as cloudy weather, and the cloudy weather includes rainy weather.

  In order to bring the daytime cultivation conditions other than during sunny weather closer to the daytime cultivation conditions during sunny weather, as shown in FIG. It is necessary to compensate for the missing long wavelength component.

  The supplementary light amount during cloudy weather is determined by comparing the spectrum measured during cloudy weather with the target spectrum set with reference to clear weather.

  For this purpose, first, a target light spectrum (target spectrum) is set with reference to the light spectrum in fine weather. Next, the measured light spectrum at the time of cloudy weather is compared with the target spectrum to compensate for the short wavelength component that is insufficient at the time of cloudy weather.

  However, it is difficult to completely reproduce the target spectrum. For this reason, as shown in FIG. 3, it is divided at a certain wavelength, and the total light quantity of the light of the wavelength in the section is matched. As an example, a method of dividing the wavelength every 100 nm as shown in FIG. 3 can be considered.

  At this time, the light spectrum under the coating changes depending on factors other than the weather, such as the coating state. For this reason, when the target spectrum is set with reference to the light spectrum in the fine weather under the coating, the value of the target spectrum itself changes depending on the measurement position of the spectrum. Therefore, in the present embodiment, a target spectrum that serves as a reference for supplementary light is set using a light spectrum in fine weather and under open weather.

  However, there is actually a very large difference between the amount of light in fine weather and under the open sky and the amount of light in cloudy weather and under the cover.

  For this reason, in order to compare the light spectrum in fine weather and under open weather with the light spectrum in cloudy weather and under cover, it is necessary to align the light intensity scale.

Therefore, in the present embodiment, when the scale is aligned, the above-described PPFD (photosynthesis effective photon flux density, unit: μmol · m ⁻² · s ⁻¹ ) is used as a reference.

  Specifically, when the PPFD of the daytime light spectrum in a sunny day and under the open air is F, and the PPFD of the daytime light spectrum under the coating is S, each component of the daytime light spectrum in the sunny day and under the open air Multiply by S / F. By setting and storing the obtained optical spectrum as the target spectrum, the PPFD of the target spectrum is aligned with S.

  This makes it possible to align the scales of the daytime light PPFD under clear weather and the daytime light PPFD under the cover, and the target spectrum based on the daytime light spectrum under fine weather and under the open air. Can be set.

  Therefore, by comparing the light spectrum of the daytime under the cover with the target spectrum and supplementing the long wavelength component that is insufficient with respect to the target spectrum, the same spectrum as in clear weather can be obtained even when it is cloudy in the covering cultivation of tea. Can do. Thereby, the fluctuation width of the cultivation conditions due to the weather can be reduced, variation in the quality of the tea that is the harvest can be suppressed, and the supplementary light amount can be reduced.

  The schematic configuration of the light supplement system according to the present embodiment will be described below.

<Schematic configuration of supplementary light system>
FIG. 1 is a block diagram illustrating a schematic configuration of a main part of an auxiliary light system 1 according to the present embodiment. FIG. 2 is a schematic diagram showing a schematic configuration of a main part of the light supplement system 1 according to the present embodiment. In FIG. 2, the light quantity measuring device 200 and its installation part are shown partially enlarged by surrounding them with a frame.

  As described above, the supplementary light system according to the present embodiment is insufficient to irradiate the light irradiation target with light that always has an appropriate light spectrum (wavelength component) for the target. A system for supplementing the optical spectrum.

  As shown in FIG. 1, a light supplement system 1 according to the present embodiment includes a power feeder 100 (light quantity control means), a light quantity measurement device 200 (first wavelength component measurement means), and a light supplement apparatus 300 (light supplement means). And a covering material 400 (covering member).

  Hereinafter, a schematic configuration of each part (each device) of the supplementary light system 1 will be described.

<Coating material 400>
First, the covering material 400 will be described. The covering material 400 is a covering member used for covering a plant to be cultivated for coating, which is a light irradiation (complementary light) object by the supplementary light system 1. The covering material 400 is appropriately selected and designed so as to obtain an external light transmittance (incidence rate) or light shielding rate suitable for growing plants to be cultivated for coating.

  In the present embodiment, the covering material 400 to be used is determined according to the type of tea to be produced and the production environment. As the covering material 400 used in the present embodiment, a covering material such as a conventional or a known light-shielding member conventionally used for covering cultivation of tea can be used.

  Although it does not specifically limit as the coating | covering material 400, For example, a cold cocoon, a net | network, a nonwoven fabric, a woven fabric, a bag, cocoon, Yoshizu etc. can be used individually or in combination. Among these, a silver-colored material such as a black-and-white reed that has a heat shielding effect and a silver non-woven fabric is preferably used.

  The covering material 400 only needs to have a size capable of covering a plant to be cultivated by coating, and the coating method by the covering material 400 is particularly limited as long as the plant to be cultivated by coating can be covered. It is not a thing.

  The covering method with the covering material 400 may be appropriately selected and determined according to the number and size of plants covered with the covering material 400, location conditions, and the like. As the covering method, for example, the covering material 400 such as shelf covering or tunnel covering is in a floating state (in a separated state) so as not to contact the covering object (light irradiation object) such as tea stock or tea tree. The covering material 400 may be fixed by the so-called floating coating, or the covering material 400 may be directly spread on the object to be coated and fixed by the fixing member.

  FIG. 2 shows a state in which a plurality of tea 2 to be cultivated for covering are planted in a line.

  In this case, for example, depending on the size of the tea 2, a plurality of pillars (not shown) are installed around the tea 2 at an appropriate distance from the tea 2, for example, in a tunnel shape or a shelf shape, or assembled in a house shape. Equally, by attaching the covering material 400 to the ceiling portion and the peripheral portion in a detachable manner, the external light can be adjusted by the covering material 400 so as to have a predetermined incident rate. Further, by attaching the light supplement device 300 to the covering material 400 or a support column (not shown), the light can be efficiently irradiated onto the cha 2, so that the light supplement efficiency can be improved.

<Light quantity measuring device 200>
Next, the light quantity measuring device 200 will be described. The power feeder 100 will be described in detail later.

  The spectrum of light received by the tea is measured by the light quantity measuring device 200. The light quantity measuring device 200 is an under-coated spectrum measuring unit that measures an optical spectrum (under-coated spectrum) under the coating of the covering material 400.

  For the light quantity measuring device 200, for example, a known photodetector is used. As shown in a partially enlarged view in FIG. 2, the light amount measuring device 200 includes a light receiving unit 201, and is installed on the crown surface 3 of the tea 2 covered with the covering material 400 with the light receiving unit 201 as an upper surface.

  Note that the light amount measuring device 200 is desirably arranged in the vicinity of a plant (cha 2) that is a light irradiation target. Thereby, the optical spectrum of the wavelength region actually irradiated to the plant (cha 2) can be accurately detected.

<Auxiliary device 300>
The light supplement device 300 includes a wiring 301 connected to the power feeder 100, and a plurality of LEDs (light emitting diodes) 302 attached to the wiring 301 as a light source for supplement light.

  The light compensator 300 according to the present embodiment includes a red (R) LED and a far red (FR) LED as an LED 302, an R component (R light) complementary LED, and an FR component (FR light) complementary LED. LED is provided. In the light supplement device 300, the current supplied to the LEDs 302 can be independently controlled by the LED for R component supplementation and the LED for FR component supplementation. (On)) and extinguishing (current OFF (off)) are possible. For this reason, it is possible to independently control the R light and the FR light, and it is also possible to supplement only light of one of the wavelengths.

  As described above, the content of theanine in the tea leaf can be increased by supplementing the FR light. In addition, the effect of R light is generally known to be a growth promoting effect, although it depends on the type of plant.

  The LED 302 is installed inside the covering material 400, and the amount of irradiation light is adjusted by controlling a current value supplied to the LED 302 by a power supply control unit 16 (see FIG. 1) described later in the power feeder 100.

  In the present embodiment, as shown in FIG. 2, as an example, a plurality of wires 301 are connected to the power feeder 100 and a plurality of LEDs 302 are provided in one wire 301. It is shown. However, the number of wirings 301 and the number of LEDs 302 may be appropriately set according to the number and size of the chas 2 covered with the covering material 400 and are not particularly limited.

  The wiring 301 and the LED 302 are provided on a ceiling portion (ceiling position) inside the covering material 400 by being attached to the covering material 400 or a post (not shown).

  That is, the light supplement device 300 may be formed integrally with the covering material 400 by being directly attached to the covering material 400, or may be provided separately from the covering material 400. That is, the light supplement system 1 may constitute one device as a whole, and may include the covering material 400 separately from other devices.

  In addition, as the light source for supplementary light, an LED that easily emits light and emits light with a large proportion of light energy in the effective wavelength region is preferably used. However, a light source other than an LED may be used as long as light in a desired wavelength region can be irradiated.

<Power feeder 100>
As shown in FIG. 1, the power feeder 100 includes a first storage unit 11 that stores an undercover spectrum, a second storage unit 12 that stores an open-air spectrum, a third storage unit 13 that stores a target spectrum, and an auxiliary unit. An auxiliary light control signal generating unit 14 that generates an auxiliary light control signal for controlling the optical device 300, a timer unit 15 that outputs a timer signal as a trigger signal for driving the auxiliary light control signal generating unit 14, A power supply control unit 16 (light quantity adjustment unit) that generates a power supply control signal in accordance with the supplementary light control signal generated by the light control signal generation unit 14, and the light supplementer 300 by the power supply control signal from the power supply control unit 16. A power supply unit 17 for outputting a power supply signal is included.

  Here, the under-cover spectrum stored in the first storage unit 11 is an optical spectrum under the covering with the covering material 400, which is measured by the light amount measuring device 200 as described above. In the present embodiment, in the first storage unit 11, the measured value measured by the light amount measuring device 200, that is, the tea 2 that is the light irradiation object is covered with the light shielding coating material 400. 2 is stored as an under-cover spectrum (that is, a light-shielded spectrum).

  Also, the clear weather outdoor spectrum stored in the second storage unit 12 is a daytime light spectrum under the open weather in a fine weather. In the present embodiment, this sunny weather outdoor spectrum is stored in advance in the second storage unit 12.

  As described above, the target spectrum stored in the third storage unit 13 is F when the PPFD of the daytime light spectrum in fine weather and under the open weather is set to F, and the PPFD of the daytime light spectrum under the cover is set to S. This is an optical spectrum obtained as a result of multiplying each component of the daytime optical spectrum in fine weather and under open weather by S / F.

  Note that a rewritable storage medium is used as the first storage unit 11 and the third storage unit 13. On the other hand, the recording medium used for the second storage unit 12 may be readable and need not be rewritable. In addition, the 2nd memory | storage part 12 may be formed so that rewriting is possible using a communication means.

  The PPFD varies depending on the season, such as summer and winter. For this reason, it is desirable for the second storage unit 12 to store, for example, seasonal open-air spectra for each season. For example, a plurality of clear-air open-air spectra are stored for each season or each region. It is desirable.

  As described above, it is difficult to completely reproduce the target spectrum. For this reason, as shown in FIG. 3, the light spectrum used for calculation of the target spectrum (that is, the amount of light for each wavelength) is divided by a certain amount of wavelengths (for example, every 100 nm), so The total amount of light is used.

  Further, as shown in FIG. 1, the supplementary light control signal generation unit 14 includes a target spectrum setting unit 21 and a determination unit 22 (first determination unit, light amount comparison unit).

  The target spectrum setting unit 21 uses the signal from the timer unit 15 as a trigger to calculate the target spectrum from the under-cover spectrum stored in the first storage unit 11 and the clear weather open-air spectrum stored in the second storage unit 12. Set the spectrum.

  The determination unit 22 compares the target spectrum stored in the third storage unit 13 with the undercover spectrum stored in the first storage unit 11, and determines whether the undercover spectrum is less than the target spectrum. The determination result is output to the power supply control unit 16 as an auxiliary light control signal. Here, the under-cover spectrum and the target spectrum are performed for each spectral component (that is, for each wavelength region within a certain range as described above). In the present embodiment, comparison between the under-cover spectrum and the target spectrum is performed for the R component (R light) and the FR component (FR light), respectively. In the present embodiment, the R component is light having a wavelength of 600 to 700 nm, and the FR component is light having a wavelength of 700 to 800 nm.

  The timer unit 15 measures time and outputs a signal (timer signal) for notifying that a preset time has been reached to the supplementary light control signal generation unit 14. The time set in the timer unit 15 can be arbitrarily set.

  The supplementary light control signal generation unit 14 outputs, to the power supply control unit 16, a result of comparing whether or not the under-cover spectrum is smaller than the target spectrum by the determination unit 22 as a supplementary light control signal.

  The power supply control unit 16 controls power supply for controlling the power supply unit 17 in accordance with an auxiliary light control signal from the auxiliary light control signal generation unit 14, that is, a signal indicating a result of comparing the target spectrum and the undercover spectrum. Output a signal.

  Specifically, when the undercover spectrum is smaller than the target spectrum, a power control signal for increasing the current supplied to the light supplement device 300 is output to the power supply unit 17, and the undercover spectrum is not smaller than the target spectrum. That is, when the under-cover spectrum is the same as or larger than the target spectrum, a power control signal for reducing the current supplied to the light supplement device 300 is output to the power supply unit 17.

  The power supply unit 17 controls the current supplied to the light supplement device 300 according to the power supply control signal from the power supply control unit 16. As described above, the light supplement device 300 includes, as the LED 302, an LED for R component supplementation and an LED for FR component supplementation. The power supply unit 17 controls the current value supplied to the R component complementary LED and the FR component complementary LED in accordance with the power control signal from the power supply control unit 16, so that the R component complementary light is supplied. The irradiation light quantity in the LED for use and the LED for supplementing the FR component is adjusted independently.

<Auxiliary light treatment>
Next, the flow of supplementary light processing in the supplementary light system 1 will be described below with reference to FIG. FIG. 4 is a flowchart showing the flow of supplementary light processing in the supplementary light system 1.

  First, the under cover spectrum stored in the first storage unit 11 and the clear weather open-air spectrum stored in the second storage unit 12 are acquired from the timer unit 15 using the input of the timer signal as a trigger (step S1). ).

  Next, a target spectrum that is a target of supplementary light is set from the acquired under-cover spectrum and the clear-sky outdoor spectrum (step S2). This target spectrum is set for each of the R component and the FR component, and is stored in the third storage unit 13. Specifically, when the PPFD of the open-air spectrum under clear weather is F and the PPFD of the under-cover spectrum stored in the first storage unit 11 is S, each component of the open-air spectrum under sunny weather is multiplied by S / F. Thus, the target spectrum is obtained. Here, the R component and the FR component of the target spectrum are obtained by multiplying the R component and the FR component of the spectrum under the sunny weather by S / F, respectively.

  Subsequently, the under-cover spectrum stored in the first storage unit 11 is compared with the target spectrum stored in the third storage unit (S3). Here, it is compared for each R component and FR component of the spectrum whether or not the under-covered spectrum is less than the target spectrum.

  First, it is determined whether or not the R component of the undercover spectrum is smaller than the R component of the target spectrum (step S4). Here, when it is determined that the R component is small (that is, in the case of YES), increase control of the R component LED supply current is performed (step S5). Specifically, the current supplied to the R component complementary LED in the light supplement device 300 is increased.

  On the other hand, when it is determined in step S4 that the R component of the undercover spectrum is not smaller than the R component of the target spectrum (that is, in the case of NO), it is subsequently determined whether or not the FR component is small (step S4). S6). Here, when it is determined that the FR component is small (that is, YES), increase control of the LED component current supply for the FR component is performed (step S7). Specifically, the current supplied to the FR component complementary LED in the light supplement device 300 is increased.

  In step S5 and step S7, the current is increased at a preset rate. However, the rate of increase in current may be obtained each time in consideration of how much the undercover spectrum is smaller than the target spectrum. The increase in current includes an increase in current from 0 V, that is, the current ON of the LED 302.

  When the processes of step S5 and step S7 are completed, the process proceeds to step S2 again to set a target spectrum.

  Further, when it is determined in step S6 that the FR component is not small (that is, in the case of NO), all the LED supply currents are decreased (step S8), the process proceeds to step S1 again, and the undercover data is again obtained. The supplementary light processing is continued until a signal (timer signal) for obtaining and notifying that the preset time has come from the timer unit 15 is input again.

  In step S8, the current is reduced at a preset rate. However, the rate of decrease in current may be obtained each time in consideration of how much the undercover spectrum is larger than the target spectrum. The decrease in the current includes the current OFF of the LED 302. That is, when it is determined in step S6 that the FR component is not small, it may be determined that the sky is clear and the current supplied to the LED 302 may be stopped.

  In FIG. 4, the comparison of the undercover spectrum and the target spectrum is performed in the order of the R component and the FR component. However, the present invention is not limited to this, and the determination order may be reversed. Or you may carry out in parallel.

<effect>
According to the above-described supplementary light system 1, as described above, when the PPFD of the sunny day open spectrum is F and the PPFD of the shaded spectrum is S, the target spectrum is obtained by multiplying the sunny day open spectrum by S / F. The PPFD can be aligned with S.

  Thereby, the spectrum of the light of the daytime at the time of the fine weather under the coating | cover with the said coating | coated material 400 can be set as a target spectrum from the said under-cover spectrum and the clear-sky open-air spectrum.

  According to the supplementary light system 1, as described above, the target spectrum is set with reference to the daytime light spectrum in fine weather, and the wavelength component that is insufficient in cloudy weather is compared by comparing the light-shielded spectrum with the target spectrum. (That is, it is possible to compensate for the amount of light in a wavelength region where the amount of light is insufficient during cloudy weather).

  This makes it possible to bring the daytime light spectrum in cloudy weather (that is, other than during fine weather) closer to the daytime spectrum in fine weather, reducing the fluctuation of the cultivation conditions due to the weather, and the quality of the tea that is the harvest The variation of can be suppressed.

  Further, since supplementary light is performed with the target in the daytime when it is under cover (light-shielding) and when it is cloudy (that is, when it is not sunny), the total amount of light is small and the amount of supplementary light can be reduced.

<Modification>
As described above, the supplementary light system 1 may be one in which the timer unit 15 performs time measurement and outputs a timer signal to the supplemental light control signal generation unit 14 at a preset time. As shown by a dotted line in FIG. 1, the power feeder 100 further includes a fourth storage unit 18, stores the annual sunrise and sunset times in the fourth storage unit 18, measures the date and time by the timer unit 15, The configuration may be such that the LED 302 is turned on at the sunset time and the LED 302 is turned off at the sunset time.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the first embodiment, a sunny day outdoor spectrum is measured in advance, and is input and stored in the second storage unit 12 in advance, thereby using the sunny day outdoor spectrum stored in the second storage unit 12 in advance. The case where the target spectrum is set has been described.

  On the other hand, in this embodiment, the case where the spectrum under a sunny weather is measured in real time and used for setting the target spectrum will be described.

<Schematic configuration of supplementary light system 1>
FIG. 5 is a block diagram illustrating a schematic configuration of a main part of the light supplement system 1 according to the present embodiment. 6 and 8 are schematic views showing a schematic configuration of a main part of the supplementary light system 1 according to the present embodiment.

  As shown in FIG. 5, the light supplement system 1 according to the present embodiment measures the power feeder 100, the light amount measuring device 200 that measures the under-cover spectrum, the light supplement device 300, the covering material 400, and the under-open spectrum. A light quantity measuring device 500 (second wavelength component measuring means) is provided.

  As shown in FIG. 8, when a plurality of supplementary light systems 1 (complementary light devices) are provided in the field, each supplementary light system 1 may be supplied with a current from one power source 600, and each Current may be supplied from a power source.

  In the power feeder 100 included in the light supplement system 1 according to the present embodiment, a configuration for setting a target spectrum using a sunny weather outdoor spectrum measured by the light amount measuring device 500 is used instead of the timer unit 15. A timer unit 20 is provided, and a determination unit 19 is newly added as a second determination unit in addition to the determination unit 22 as a first determination unit.

  Hereinafter, a configuration different from that of the first embodiment will be described.

<Light quantity measuring device 500>
The light quantity measuring device 500 is an open-air spectrum measurement unit that measures the light spectrum under the open-air (that is, the light spectrum under the open-air at the place where the supplementary light system 1 is installed).

  The light quantity measuring device 500 is provided outside the covering material 400 and measures the spectrum of light received by the covering object when the covering object (cha 2) is not covered.

  The light amount measuring device 500 is the same type of light amount measuring device as the light amount measuring device 200. For the light amount measuring device 500, for example, a known photo detector is used. The light quantity measuring device 500 includes a light receiving unit 501 and is installed outside the covering material 400 that covers the tea 2 with the light receiving unit 501 as an upper surface.

<Determining unit 19>
The determination unit 19 determines whether the weather is a clear sky (that is, whether there is a sufficient amount of light as a clear sky), whether it is daytime or nighttime (that is, enough during the daytime), It is determined whether or not there is a light amount.

  Then, when the determination unit 19 determines from the above-described outdoor spectrum that the weather is clear (sunny and daytime) (that is, when it is determined that the outdoor spectrum is a sunny outdoor spectrum), the determination of the outdoor spectrum It memorize | stores in the 2nd memory | storage part 12 as a spectrum under time.

  Further, when the determination unit 19 determines that it is cloudy (cloudy and daytime) from the above-mentioned outdoor spectrum (that is, when it is determined that the outdoor spectrum is a cloudy outdoor spectrum), the supplementary light control signal generation unit 14 In response to this, a signal instructing the start of supplementary light processing (complementary light control signal generation processing) is output. Also in this embodiment, cloudy weather indicates a case where the sky is not clear as described above, and includes rainy weather.

  Further, when the determination unit 19 determines that the nighttime spectrum is based on the nighttime spectrum (that is, when the outdoor spectrum is determined to be the nighttime spectrum), the determination unit 19 instructs the power supply control unit 16 to stop the LED supply current. Output a signal.

  Specifically, the determination unit 19 determines that the under-exposure spectrum acquired from the light amount measuring device 500 is based on two preset threshold values (first threshold value> second threshold value), and the open-air spectrum under cloudy weather and under the cloudy weather. Whether it is a spectrum or a night spectrum is determined. The flow of this determination process will be described later.

  As described above, the determination result in the determination unit 19 is also output to the auxiliary light control signal generation unit 14 and also serves as a trigger for starting the auxiliary light control signal generation process in the auxiliary light control signal generation unit 14. In addition, the determination result in this case is a signal when it is determined that the spectrum under the open air is a cloudy outdoor spectrum.

<Timer unit 20>
The timer unit 20 functions in the same manner as the timer unit 15 in the power feeder 100 described in the first embodiment. That is, the timer signal output from the timer unit 20 to the determination unit 19 is used as a trigger signal for starting determination processing in the determination unit 19.

<Auxiliary light treatment>
Next, the flow of supplementary light processing in the supplementary light system 1 according to the present embodiment will be described below with reference to FIGS. 4 and 7. FIG. 7 is a flowchart showing the flow of supplementary light processing in the supplementary light system 1 according to the present embodiment.

  In the light supplement system 1 according to the present embodiment, the light supplement process shown in step S15 is substantially the same as the process described in the flowchart of FIG. 4 in the first embodiment. A process for determining whether the sky is clear or not, whether it is daytime or nighttime, is added from the spectrum under the open air, which is performed by the determination unit 19 (second determination unit).

Here, two threshold used in the determination process (first threshold value, second threshold value), respectively 1000μmol ^· m ^{-2 ·} s -1, and 10μmol ^{· m} -2 ^{· s -1.}

  First, the determination unit 19 acquires a spectrum under the open air as the outdoor data from the light amount measuring device 500 (step S11). Here, it is assumed that the determination unit 19 acquires the outdoor spectrum from the timer unit 20 for a predetermined time (for example, every hour).

Next, it is determined from the acquired outdoor spectrum whether the PPFD of the outdoor spectrum is 1000 μmol · m ⁻² · s ⁻¹ or more (step S12). Here, when the PPFD is 1000 μmol · m ⁻² · s ⁻¹ or more (that is, in the case of YES), it is determined that the acquired PPFD is an open-air spectrum in a fine weather, and the open-air spectrum is determined as an open-air spectrum. The lower spectrum is stored in the second storage unit 12 (step 13). At this time, if there is previous data (that is, the data of the spectrum under the open weather on a clear day), it is updated.

  For this reason, in the first embodiment, a rewritable storage medium is used for the second storage unit 12 as well as the first storage unit 11 and the third storage unit 13.

On the other hand, if the PPFD is not 1000 μmol · m ⁻² · s ⁻¹ or more in step S12 (that is, NO), it is determined that the acquired PPFD is not a clear-air spectrum under the clear sky, and the PPFD is 10 μmol · m ⁻ It is determined whether or not ² · s ⁻¹ or more (step S14). Here, when the PPFD is 10 μmol · m ⁻² · s ⁻¹ or more, it is determined to be cloudy and daytime, and the process proceeds to step S15 to perform supplementary light processing.

  The supplementary light processing in step S15 is the same as the supplementary light processing described in the first embodiment, that is, the processing in steps S1 to S7 or steps S1 to S8 shown in FIG.

  And if the light supplement process in step S15 is complete | finished, it will transfer to step S11 again. That is, in the present embodiment, when step S6 or step S8 shown in FIG. 4 is completed, the process proceeds to step S11 again.

In step S14, if the PPFD is not 10 μmol · m ⁻² · s ⁻¹ or more, it is determined that it is nighttime, and the LED 302 is turned off (step S16). Here, the determination unit 19 outputs a signal indicating an instruction for turning off the current of the LED 302 to the power supply control unit 16 as a determination result.

  Upon receiving this determination result, the power supply control unit 16 outputs a control signal for stopping the current supplied to the LED 302 of the light supplement device 300 to the power supply unit 17.

  When the LED current OFF process in step S16 is completed, the process proceeds to step S11 again.

<effect>
According to the present embodiment, as described above, the light quantity measuring device 500 under the open air is provided, the clear sky is determined from the PPFD value of the under open spectrum measured by the light amount measuring device 500, and the under open spectrum is the clear sky. If it is a spectrum under hourly weather, the spectrum during fine weather stored in the second storage unit 12 is automatically updated.

  Tea farmers' fields are generally large in area and have a large number of strawberries as shown in FIG. However, according to the supplementary light system 1, the target spectrum can be set and updated automatically even in a large-scale farm field, and supplementary light control according to the location and climate of the farm field can be performed.

  As described above, according to the present embodiment, by automatically setting / updating the target spectrum, the operator only has to install the supplementary light system 1 (complementary light device), and can cope with a very large farm field. It becomes possible.

  Moreover, since the said supplementary light system 1 measures and operates the intrinsic | native light quality conditions of an installation place, it can perform supplementary light control according to the location and climate of each agricultural field.

  For this reason, according to the present embodiment, for the tea farmers who tend to increase the scale of the field, it is possible to manage the light supplement of the field with labor-saving, and to provide a light supplement system that can suppress variations in product quality. Can be provided.

[Embodiment 3]
The following will describe still another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

<Schematic configuration of supplementary light system 1>
FIG. 9 and FIG. 10 are schematic diagrams illustrating a schematic configuration of a main part of the light supplement system 1 according to the present embodiment. FIG. 11 is a schematic diagram showing a state of the supplementary light processing by the supplementary light system 1 according to the present embodiment.

  As shown in FIGS. 9 and 10, the auxiliary light system 1 according to the present embodiment includes an input device that communicates with the power feeder 100 in addition to the power feeder 100, the light amount measuring devices 200 and 500, the light supplement device 300, and the covering material 400. An input / output terminal 700 is provided as output means.

  The light quantity measuring devices 200 and 500, the light supplement device 300, and the covering material 400 are as described in the first and second embodiments. Hereinafter, differences from the supplementary light system 1 according to the second embodiment will be described.

<Power feeder 100>
In the present embodiment, the configuration of the power feeder 100 is substantially the same as that of the second embodiment. Therefore, a detailed description and a block diagram are omitted.

  The power feeder 100 of the light supplement system 1 according to the present embodiment is different from that of the second embodiment in that a communication unit (not shown) for communicating with the input / output terminal 700 is provided.

  From this communication unit, a measurement value measured by the light quantity measuring devices 200 and 500 and a setting value indicating an increase rate of the supplementary current are output to the input / output terminal 700. This communication unit includes a threshold for spectrum determination. Parameters necessary for supplementary light processing such as the set time of the timer unit 20 are input from the input / output terminal 700.

  Further, the control unit of the power feeder 100 is provided with expandability, and in addition to the supplementary light control signal generation unit 14 and the power supply control unit 16, control units such as a temperature control unit and a humidity control unit are provided. By connecting various sensors, the data on the cultivation environment of the tea such as temperature and humidity may be handled.

<Input / output terminal 700>
The input / output terminal 700 includes a display unit 701 and a communication unit (not shown). As a result, the input / output terminal 700 inputs parameters necessary for supplementary light processing such as the above-described threshold for spectrum determination, the set time of the timer unit 20, and the measured values measured by the light quantity measuring devices 200 and 500 ( (Various spectrum data), target spectrum data, output (display) such as a set value indicating an increase rate of supplementary current, and when the temperature control unit and humidity control described above are provided in the power feeder 100, the temperature, humidity, etc. It is possible to output (display) setting values related to the tea cultivation environment, and to exchange such information with the power feeder 100.

<Communication form>
Note that the communication form between the communication unit of the power feeder 100 and the communication unit of the input / output terminal 700 may be wired or wireless. Further, the communication method is not particularly limited.

  Note that, when the above-described supplementary light system 1 is used in a farm with a large area as shown in FIG. 9, or a plurality of supplementary light systems 1 (complementary light devices) are desired to be managed by a single input / output terminal 700. In this case, or when frequent adjustments (input of the above parameters, output of set values, etc.) are required, it is preferable to adopt a wireless system.

<effect>
The farm fields of tea farmers are generally large in area and have a large number of strawberries as shown in FIG. For this reason, when information is input from the outside to the control unit of the power feeder 100, it is useful to be able to perform collective management. According to the present embodiment, as described above, the input / output terminal 700 and the power feeder 100 can communicate with each other, so that information can be collectively managed even in a field with a large area.

  In addition, tea farmers with a large field spend a great deal of effort to grasp the environmental variations within the field and the difference in growth speed and quality resulting from the variation and to perform appropriate management.

  According to this embodiment, the management of these can be facilitated by collecting different environmental conditions and various environmental data in the field.

  Further, as described above, the growth rate can be controlled to some extent by controlling the R light and the FR light that affect the growth.

  Further, as shown in FIG. 11, in accordance with the change in the under-cover spectrum due to the difference in climate and environment at each point in the field, the complementary light amount of each complementary light component is changed as shown by the dotted line in FIG. Thus, variation in growth rate and quality can be suppressed.

  As a result, it becomes possible for a tea farmer using the supplementary light system 1 to save and facilitate field management, suppress the influence of weather conditions, and obtain uniform product quality.

<Modification>
In the present embodiment, the case where the power feeder 100 has substantially the same configuration as that of the second embodiment has been described as an example. However, the present embodiment is not limited thereto, and the power feeder 100 described above is not limited thereto. 100 may have substantially the same configuration as that of the first embodiment.

[Embodiment 4]
The following will describe still another embodiment of the present invention with reference to FIGS. 12 to 14 (a) to (c). For convenience of explanation, members having the same functions as those described in the first to third embodiments are denoted by the same reference numerals and description thereof is omitted.

<Schematic configuration of supplementary light system 1>
FIG. 12 is a schematic diagram illustrating a schematic configuration of a main part of the light supplement system 1 according to the present embodiment.

  In the present embodiment, the case where the light supplement system 1 has substantially the same configuration as that of the first embodiment will be described as an example.

  The supplementary light system 1 according to the present embodiment differs from the first embodiment in that the light amount measuring device 200 does not measure the light spectrum, but passes through a filter (not shown) that transmits light in a specific wavelength region. This is a point for measuring the amount of light (specific wavelength component).

<Light quantity measuring device 200>
The light receiving unit 211 of the light amount measuring device 200 used in the present embodiment includes a filter that transmits only light in a specific wavelength region.

  Photodetectors used for measuring the amount of light are expensive, and devices that measure a wide spectrum tend to be complex and expensive.

  For this reason, as the light quantity measuring device 200, the light receiving unit 211 is provided with a filter that transmits light in a specific wavelength region, and the light quantity measuring device that measures the light quantity of the light that has passed through the filter is used. The configuration (measurement method) of the light quantity measuring device can be simplified rather than measuring.

  Also in this embodiment, the light quantity measuring device 200 is installed on the crown surface 3 of the tea 2 covered with the covering material 400 with the light receiving portion 211 as the upper surface as shown in FIG.

  The filters used in the light receiving unit 211 are selected and overlaid according to the wavelength range to be measured.

  FIGS. 13A and 13B are graphs for explaining a method of measuring the light amount of the FR light by the light amount measuring device 200 according to the present embodiment as an example. FIG. 13A is a graph before filtering. FIG. 13B shows the wavelength component after filtering.

  By selecting a filter to be used so as to transmit only the FR light, only the wavelength component of the FR light is measured as shown in FIG.

  FIG. 14A is a graph showing wavelength components when passing through a filter for PPFD measurement, and FIG. 14B is a wavelength when passing through a filter for measuring FR light. It is a graph which shows a component, (c) of FIG. 14 is a graph which shows a wavelength component when letting the filter for R light measurement pass. In addition, in (a)-(c) of FIG. 14, a dotted line shows the wavelength cut with the filter.

  As shown in FIG. 14 (c), according to the present embodiment, the light amount measuring device 200 for measuring PP light and the light amount measuring device 200 for measuring FR light and / or the R light measuring device, depending on the wavelength to be measured. Two or three kinds of light amount measuring devices 200 of the light amount measuring device 200 can also be used. As a result, the number of expensive photodetectors can be reduced.

  Of course, the light supplement system 1 transmits the B light (400 nm to 500 nm), the G light (green light, 500 nm to 600 nm), the R light (600 nm to 700 nm), and the FR light (700 nm to 800 nm). A measuring device 200 may be used, and a light amount measuring device 200 that transmits B light (400 nm to 500 nm) and G light (green light, 500 nm to 600 nm) and a light amount measuring device that transmits R light (600 nm to 700 nm). Three kinds of light quantity measuring devices 200, that is, 200 and a light quantity measuring device 200 that transmits FR light (700 nm to 800 nm) may be used.

  According to the present embodiment, by arranging a plurality of light amount measuring devices 200 in this way, the same supplementary effect as that in the case of measuring a spectrum can be obtained, while the structure of the light amount measuring device 200 is simplified. Inexpensive light quantity measuring device 200 can be assembled.

<Modification>
In the present embodiment, the supplementary light system 1 has been described by taking as an example the case where the supplementary light system 1 has substantially the same configuration as that of the first embodiment. However, the present embodiment is not limited to this, and the embodiment is not limited thereto. 2 or Embodiment 3 may be used.

[Modification of Embodiments 1 to 4]
In Embodiments 1-4, the case where the covering cultivation of tea is performed has been described as an example. However, the application of the present invention is not limited only to the covering cultivation of tea, and can be widely applied to the cultivation of various plants that are influenced by the influence of the weather in the covering cultivation.

[Summary]
The supplementary light system 1 according to the first aspect of the present invention includes a plant (cha 2) covered with a covering member (covering material 400) and covered with the covering member (covering material 400) in the daytime except during fine weather. And a supplementary light system for irradiating light in a predetermined wavelength region set in advance in a wavelength region in which the amount of light is insufficient with respect to daytime in fine weather, which is covered with the covering member (covering material 400). The plant (cha 2) is irradiated to the plant (cha 2) via the light supplement means (complementary light device 300) for irradiating light in the predetermined wavelength region and the covering member (coating material 400). By the first wavelength component measuring means (light quantity measuring device 200) for measuring the wavelength component of light and the covering member (covering material 400) set as a target wavelength component from the daytime light wavelength component in fine weather Of light in the predetermined wavelength region under the coating The light supplement means (complementary light) according to a comparison result of the amount and the light quantity of the light in the predetermined wavelength region in the wavelength component measured by the first wavelength component measurement means (light quantity measuring device 200). Light amount control means (power supply device 100) for controlling the light amount of light emitted from the device 300).

  According to said structure, the light quantity of the said predetermined | prescribed wavelength range under the coating | cover by the said coating | coated member (coating material 400) set as the target wavelength component from the wavelength component of the daytime light at the time of fine weather, In accordance with the comparison result of comparing the light amount of the light in the predetermined wavelength region in the wavelength component measured by the first wavelength component measuring unit (light amount measuring device 200), the light supplementing unit (compensator 300). ) Is controlled by the light amount control means (power feeder 100), so that the light amount in the wavelength region where the light amount is insufficient during the day other than during fine weather can be compensated.

  As a result, the daytime wavelength components other than during fine weather can be brought close to the daytime wavelength components during fine weather, the fluctuation range of the cultivation conditions due to the weather can be reduced, and the plant (processed product of tea 2) can be harvested. Variation in the quality of a certain tea) can be suppressed.

  In addition, since the supplementary light is performed with the target in the daytime under the cover and other than when the weather is fine, the total amount of light is small, and the amount of supplementary light can be reduced.

  The light supplement system 1 according to the first aspect of the present invention is the light supplementary system 1 according to the first aspect, wherein the light amount control unit (power feeder 100) is a wavelength of light measured by the first wavelength component measuring unit (light amount measuring device 200). When the photosynthesis effective photon density (PPFD) of the component is S and the photosynthesis effective photon density (PPFD) of the daytime wavelength component during clear weather under the open air (PPFD) is F, A target wavelength component setting unit (target spectrum setting unit 21) that sets, as a target wavelength component, a wavelength component obtained by multiplying the wavelength component of daytime light in sunny weather by S / F, and the above target wavelength component setting Of the predetermined wavelength region in the target wavelength component set by the unit (target spectrum setting unit 21) and the wavelength component measured by the first wavelength component measuring means (light quantity measuring device 200) The amount of light emitted from the light supplement means (compensator 300) is adjusted according to the comparison result by the light amount comparison unit (determination unit 22) for comparing the amount and the light amount comparison unit (determination unit 22). And a light amount adjustment unit (power supply control unit 16).

  When designing the target wavelength component, there is a very large difference between the amount of light when it is clear and under the open sky, and the amount of light when it is cloudy and under the cover. For this reason, in order to compare the wavelength component of light in fine weather and under open weather with the wavelength component of light in cloudy weather and under cover, it is necessary to align the light intensity scale.

  Therefore, as described above, in the target wavelength component setting unit (target spectrum setting unit 21), the photosynthetic effective photon density of the wavelength component of the light measured by the first wavelength component measuring unit (light quantity measuring device 200) ( When PPFD) is S, and the photosynthesis effective photon density (PPFD) of the daytime wavelength component during sunny weather under the open air (PPFD) is F, daytime during sunny weather under the above-mentioned outdoor weather Multiplying the wavelength component of the light by S / F, the light synthesis effective photon density (PPFD) of daytime light and the light synthesis effective photon density (PPFD) of daytime light under the coating The wavelength range of light to be supplemented and its intensity can be set as the target wavelength component based on the wavelength component of daytime light in fine weather and under open weather.

  Therefore, the target wavelength component set by the target wavelength component setting unit (target spectrum setting unit 21) by the light amount comparison unit (determination unit 22) and the first wavelength component measuring means (light amount measuring device 200). The amount of light of the predetermined wavelength region in the measured wavelength component is compared, and according to the comparison result, the amount adjusting unit (power supply control unit 16) performs the light supplementing unit (compensator 300). ) Can be controlled by the light amount control means (power feeder 100) by adjusting the light amount emitted from the light supplement means (compensator 300).

  In the supplementary light system 1 according to aspect 3 of the present invention, in the aspect 2, the light amount adjustment unit (power supply control unit 16) is configured so that the first wavelength component is based on a comparison result by the light amount comparison unit (determination unit 22). Of the light in the predetermined wavelength region in the wavelength component measured by the measuring means (light amount measuring device 200), the light amount in the wavelength region having a light amount smaller than the light amount in the predetermined wavelength region in the target wavelength component May be increased.

  According to said structure, the light of the said predetermined wavelength area in the said target wavelength component among the lights of the said predetermined wavelength area in the wavelength component measured by the said 1st wavelength component measurement means (light quantity measuring device 200). By increasing the amount of light in a wavelength region where the amount of light is less than the amount of light, it is possible to obtain a light spectrum that is substantially the same as that in fine weather, even in cloudy weather.

  In the supplementary light system 1 according to the aspect 4 of the present invention, in the aspect 3, the light amount adjusting unit (the power supply control unit 16) is configured such that the first wavelength component is based on a comparison result obtained by the light amount comparing unit (the determining unit 22). When the light in the predetermined wavelength region in the wavelength component measured by the measuring means (light quantity measuring device 200) is larger than the light amount of the light in the predetermined wavelength region in the target wavelength component, the auxiliary light means (complementary light) The current supplied to the device 300) may be stopped.

  That is, the light amount adjustment unit (power supply control unit 16) determines the wavelength component measured by the first wavelength component measuring unit (light amount measuring device 200) from the comparison result by the light amount comparison unit (determination unit 22). When the light in the predetermined wavelength region is less than the light amount in the predetermined wavelength region in the target wavelength component, the light in the wavelength region in which the light amount is less than the light amount in the predetermined wavelength region in the target wavelength component And the light in the predetermined wavelength region in the wavelength component measured by the first wavelength component measuring means (light amount measuring device 200) is the light amount of the light in the predetermined wavelength region in the target wavelength component. When the number is larger, the current supplied to the light supplement means (the light supplement device 300) may be stopped.

  According to said structure, when the weather recovers, the light of the said predetermined wavelength area in the wavelength component measured by the said 1st wavelength component measurement means (light quantity measuring device 200) in the said target wavelength component When the amount of light in the predetermined wavelength region exceeds the amount of light, it is possible to automatically stop the current supplied to the light supplement means (light supplement device 300). For this reason, in addition to the effect of the aspect 3, when the light quantity comparison unit (determination unit 22) shows that the light amount of the predetermined wavelength region in the target wavelength component is larger than the light quantity comparison unit (determination unit 22), the sky is automatically cleared. Since the current supplied to the above-mentioned light supplement means (complementary light device 300) can be stopped by considering it as time, even if it is not separately determined whether or not it is fine weather, it is under cover and in the daytime other than fine weather As a target, supplementary light can be performed, and the effect that the amount of supplemental light can be reduced can be obtained.

  A supplementary light system 1 according to Aspect 5 of the present invention is the light supplement system 1 according to any one of Aspects 1 to 5, wherein a second wavelength component measuring means (light quantity measurement) that measures the wavelength component of daytime light on a sunny day under an open-air 500), and the light quantity control means (power feeder 100) is measured by the second wavelength component measuring means (light quantity measuring device 500) with a first threshold value and a second threshold value smaller than the first threshold value. A determination unit (determination) that determines whether the wavelength component is a daytime light wavelength component in fine weather, a daytime light wavelength component other than during fine weather, or a nighttime light wavelength component Unit 19), and it is determined that the wavelength component measured by the second wavelength component measuring means (light quantity measuring device 500) is a wavelength component of daytime light in a fine weather, based on the wavelength component Update the target wavelength component When it is determined that the wavelength component measured by the second wavelength component measuring means is the wavelength component of daytime light other than during fine weather, according to the comparison result, from the light supplementing means (compensator 300). When the light quantity of the irradiated light is controlled and it is determined that the wavelength component measured by the second wavelength component measuring means (light quantity measuring device 500) is the wavelength component of the nighttime light, the supplementary means (complementary means) The current supplied to the optical device 300) may be stopped.

  According to the above configuration, it is automatically determined not only whether the sky is clear but also whether it is nighttime from the wavelength component measured by the second wavelength component measuring means (light quantity measuring device 500). be able to. For this reason, it is possible to automatically perform light supplementing with a target in the daytime other than when it is under the cover and in fine weather without setting the light supplementing time.

  Moreover, according to said structure, the wavelength component measured by the said 2nd wavelength component measurement means (light quantity measuring device 500) by the said determination part (determination part 19) is a wavelength component of the daytime light at the time of fine weather. When it is determined that the target wavelength component can be automatically updated based on the wavelength component, even by installing the supplementary light system 1 automatically even in a large-scale field, Supplementary light control according to the location and climate of the farm can be performed.

  In the supplementary light system 1 according to the aspect 6 of the present invention, in any of the above aspects 1 to 5, the wavelength component measuring means (light quantity measuring devices 200 and 500) includes a filter that transmits light in a specific wavelength region. In addition, the amount of light transmitted through the filter may be measured.

  Photodetectors used for measuring the amount of light are expensive, and devices that measure a wide spectrum tend to be complex and expensive.

  Therefore, the wavelength component measuring means (light quantity measuring device 200/500) includes a filter that transmits light in a specific wavelength region, and the wavelength component measuring means (light quantity measuring device) that measures the light quantity of the light that has passed through the filter. 200/500), the configuration (measurement method) of the wavelength component measuring means (light quantity measuring device 200/500) can be simplified as compared with the case where the spectrum of light is measured as the wavelength component. it can.

  For this reason, according to said structure, the supplementary light effect similar to the case where a spectrum is measured can be implement | achieved by an inexpensive wavelength component measuring means (light quantity measuring device 200 * 500).

  The light supplement system 1 according to the seventh aspect of the present invention may further include the input / output terminal 700 that communicates with the light amount control unit (the power feeder 100) in any one of the first to sixth aspects.

  According to the above configuration, since the light supplement system 1 includes the input / output terminal 700, information can be exchanged between the light amount control means (power feeder 100) and the input / output terminal 700. In addition, for example, even in a field of a large area such as a field of a tea farm, information can be collectively managed and information can be easily managed.

  INDUSTRIAL APPLICATION This invention can be utilized for the supplementary light system which irradiates light to the plant by which covering cultivation, such as a tea, is carried out by the coating | covering material.

1 Auxiliary light system 2 Cha (plant)
DESCRIPTION OF SYMBOLS 3 Tree crown 11 1st memory | storage part 12 2nd memory | storage part 13 3rd memory | storage part 14 Supplementary light control signal generation part 15 Timer part 16 Power supply control part (light quantity adjustment part)
17 power supply unit 18 fourth storage unit 19 determination unit 20 timer unit 21 target spectrum setting unit 22 determination unit (light quantity comparison unit)
100 Power feeder (light quantity control means)
200 Light quantity measuring device (first wavelength component measuring means)
201 Light-receiving unit 211 Light-receiving unit 300 Auxiliary device (complementary means)
301 Wiring 302 LED
400 Coating material (coating material)
500 Light quantity measuring device (second wavelength component measuring means)
501 Photodetector 600 Power supply 700 Input / output terminal

Claims (5)

A predetermined wavelength region set in advance in a wavelength region in which the amount of light is insufficient with respect to the daytime in fine weather, during the day other than during fine weather, on a plant coated with the coating member, during the day other than during fine weather. A supplementary light system that emits light of
A light supplementing means for irradiating light of the predetermined wavelength region to a plant installed inside the covering member and covered with the covering member;
First wavelength component measuring means for measuring a wavelength component of light irradiated to the plant through the covering member;
Measured by the first wavelength component measuring means and the light amount of the light in the predetermined wavelength region under the covering by the covering member, set as the target wavelength component from the daytime light wavelength component in fine weather And a light amount control means for controlling the light amount of the light emitted from the light supplement means in accordance with a comparison result comparing the light amount of the predetermined wavelength region in the wavelength component. Light system. The light quantity control means is
When the photosynthesis effective photon density of the wavelength component of the light measured by the first wavelength component measuring means is S, and the photosynthesis effective photon density of the daytime wavelength component in a clear day under the open air is F, A target wavelength component setting unit for setting, as a target wavelength component, a wavelength component obtained by multiplying the wavelength component of daytime light during sunny day below by S / F;
A light amount comparison unit that compares the light amount of the light in the predetermined wavelength region in the target wavelength component set by the target wavelength component setting unit and the wavelength component measured by the first wavelength component measurement unit;
The supplementary light system according to claim 1, further comprising: a light amount adjusting unit that adjusts a light amount of light emitted from the supplementary light unit in accordance with a comparison result by the light amount comparing unit. From the comparison result by the light amount comparison unit, the light amount adjustment unit,
When the light in the predetermined wavelength region in the wavelength component measured by the first wavelength component measuring means is less than the light amount of the light in the predetermined wavelength region in the target wavelength component, the predetermined wavelength in the target wavelength component Increasing the amount of light in the wavelength region that is less than the amount of light in the wavelength region of
When the light in the predetermined wavelength region in the wavelength component measured by the first wavelength component measuring unit is larger than the light amount of the light in the predetermined wavelength region in the target wavelength component, the light is supplied to the auxiliary light unit. The supplementary light system according to claim 2, wherein the current is stopped. A second wavelength component measuring means for measuring the wavelength component of the daytime light on a sunny day under an open-air,
The light quantity control means is
The wavelength component measured by the second wavelength component measuring means by the first threshold value and the second threshold value smaller than the first threshold value is a wavelength component of daytime light in fine weather, or a day other than fine weather A determination unit that determines whether the wavelength component of light in the middle or the wavelength component of light at night,
When it is determined that the wavelength component measured by the second wavelength component measuring means is a wavelength component of daytime light in fine weather, the target wavelength component is updated based on the wavelength component,
When it is determined that the wavelength component measured by the second wavelength component measuring unit is a wavelength component of daytime light other than during fine weather, according to the comparison result, the light emitted from the auxiliary light unit Control the amount of light,
The current supplied to the auxiliary light means is stopped when it is determined that the wavelength component measured by the second wavelength component measuring means is a wavelength component of nighttime light. The supplementary light system according to any one of the above.   5. The supplement according to claim 1, wherein the wavelength component measuring unit includes a filter that transmits light in a specific wavelength region, and measures the amount of light transmitted through the filter. Light system.

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