JP2015065387A - Farm management apparatus and farm management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a farm management apparatus and a farm management system capable of controlling photovoltaic power generation panels in association with plant cultivation.SOLUTION: A farm management apparatus 50 includes: photovoltaic power generation panels 11 which are disposed above plants 1; and a posture changing unit 12 that changes the posture of the photovoltaic power generation panel 11. The farm management apparatus 50 includes: an illuminance data storage 9 storing data of reference illuminance corresponding to optical saturation point necessary for growing of the plants 1; and a control unit 5 that controls the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 based on the data of the reference illuminance.

Description

  The present invention relates to a field management device and a field management system provided with a photovoltaic power generation panel.

  Conventionally, a field management device using a photovoltaic power generation panel has been studied. This field management device realizes both photovoltaic power generation and plant growth on the same land by installing a photovoltaic power generation panel above the land where agricultural products are produced in the field. Research on this device is expected to become more active in the future due to the relaxation of regulations under the Agricultural Land Law in Japan. The following patent documents 1 and 2 are known as techniques relating to such a field management device.

Japanese Patent Laid-Open No. 205-277038 Utility model registration No. 318204

  Some photovoltaic power generation panels can change their attitude as well as those whose attitude is fixed. However, in the field management device using a conventional photovoltaic power generation panel, the photovoltaic power generation panels are arranged at a predetermined interval from each other so that light passing between the photovoltaic power generation panels is irradiated to the plants. It has only been done. That is, in the above-described conventional field management device, there is no device that controls the posture of the photovoltaic power generation panel in association with plant cultivation.

  Then, this invention is proposed in view of the situation mentioned above, and it aims at providing the agricultural field management apparatus and agricultural field management system which can control a photovoltaic power generation panel in relation to plant cultivation.

  A field management device according to an embodiment of the present invention includes a photovoltaic power generation panel installed above a plant and an attitude changing unit that changes the attitude of the photovoltaic power generation panel. The apparatus also includes an illuminance data storage unit storing reference illuminance data corresponding to a light saturation point necessary for the growth of the plant, and the posture changing unit based on the reference illuminance data. And a control unit that changes the posture of the power generation panel.

  The field management device according to the embodiment of the present invention further includes an internal illuminance sensor provided in a space below the photovoltaic power generation panel so as to acquire the illuminance of light irradiated on the plant. It is preferable. In this case, when the illuminance of the light radiated to the plant is larger than the reference illuminance, the control unit changes the attitude of the photovoltaic power generation panel to the attitude changing unit and the received light amount of the photovoltaic power generation panel is large. It is preferable to change so that it becomes. Moreover, it is preferable that the said control part makes the said attitude | position change part maintain the attitude | position of the said photovoltaic power generation panel, when the illumination intensity of the light irradiated to the said plant is the same as the said reference illumination intensity. Further, when the illuminance of light radiated to the plant is smaller than the reference illuminance, the control unit changes the attitude of the photovoltaic power generation panel to the attitude changing unit so that the received light amount of the photovoltaic power generation panel is reduced. It is preferable to make such a change.

  The field management device of an embodiment of the present invention is arranged outside the space below the photovoltaic power generation panel so as to obtain the illuminance of the sunlight without being blocked by the photovoltaic power generation panel. It is preferable to further include an external illuminance sensor provided. In this case, when the illuminance of the sunlight is smaller than the reference illuminance, the control unit changes the attitude of the solar power generation panel to the attitude changing unit so that the received light amount of the solar power generation panel is minimized. Preferably, the attitude changing unit maintains the attitude of the photovoltaic power generation panel in an attitude that minimizes the amount of light received by the photovoltaic power generation panel.

  The field management device according to the embodiment of the present invention preferably further includes a light source for irradiating the plant with light. Moreover, it is preferable that the said illumination intensity sensor is further provided with the internal illumination intensity sensor provided in the space below the said photovoltaic power generation panel so that the illumination intensity of the light irradiated to the said plant may be acquired. In this case, it is preferable that the control unit causes the light source to emit light in a state where the posture of the photovoltaic power generation panel is in a posture where the amount of light received by the photovoltaic power generation panel is minimized. Furthermore, the control unit acquires the total illuminance of the illuminance of the light of the light source and the illuminance of the sunlight as the illuminance of the light irradiated to the plant, so that the total illuminance is equal to or higher than the reference illuminance. It is preferable to adjust the light emission state of the light source.

  The field management device according to the embodiment of the present invention further includes an internal illuminance sensor provided in a space below the photovoltaic power generation panel so as to acquire the illuminance of light irradiated on the plant. It is preferable. In this case, it is preferable that the illuminance data storage unit includes reference day length data indicating a day length necessary for the growth of the plant. Moreover, it is preferable that the said control part calculates the total value of the time when the illumination intensity of the light irradiated to the said plant is more than the said reference illumination intensity as integral day long time. Furthermore, when the integrated daily long time is equal to or greater than the reference daily long time, the control unit causes the posture changing unit to provide the solar power generation so that the amount of light received by the solar power generation panel is maximized. It is preferable to change the posture of the panel.

  In the agricultural field management apparatus according to the embodiment of the present invention, it is preferable that the photovoltaic power generation panel includes a light source provided on the back side surface of the light receiving surface of the photovoltaic power generation panel. In this case, it is preferable that the light source emits light using electricity generated by the solar power generation panel.

  An agricultural field management system according to an embodiment of the present invention includes the above-described agricultural field management device, and a remote control device that is connected to the agricultural field management device via an electrical information communication network and controls the agricultural field management device remotely. Yes.

  According to the present invention, it is possible to provide a field management device and a field management system that control a photovoltaic power generation panel in association with plant cultivation.

It is a schematic diagram for demonstrating the agricultural field management apparatus of embodiment of this invention. It is a figure for demonstrating the data memorize | stored in the illumination intensity data storage part in the agricultural field management apparatus of embodiment of this invention. It is a figure which shows an example of the relationship between the illumination intensity (light quantity) at the time of fine weather, and time. It is a figure which shows an example of the relationship between the illumination intensity (light quantity) at the time of cloudy weather, and time. It is a figure which shows the minimum amount light receiving attitude | position (maximum light receiving attitude | position of a plant) of the photovoltaic power generation panel in the agricultural field management apparatus of embodiment of this invention. It is a figure which shows the maximum amount light receiving attitude | position (minimum amount light receiving attitude | position of a plant) of the photovoltaic power generation panel in the agricultural field management apparatus of embodiment of this invention. It is a figure which shows the appropriate amount light receiving attitude | position (reference | standard illumination light receiving attitude | position of a plant) of the photovoltaic power generation panel in the agricultural field management apparatus of embodiment of this invention. It is a schematic diagram which shows the illumination attitude | position which irradiates light to a plant using the electricity which the solar power generation panel generated. It is a flowchart for demonstrating the attitude | position change process in the agricultural field management apparatus of embodiment of this invention. It is a flowchart for demonstrating the appropriate amount light reception process in the agricultural field management apparatus of embodiment of this invention. It is a flowchart for demonstrating the process at the time of LED (Light Emitting Diode) lighting in the agricultural field management apparatus of embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
A field management device 50 according to the present embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the agricultural field management apparatus 50 of this Embodiment can be used in the agricultural field in which open field cultivation is performed. The farm field management device 50 includes a photovoltaic power generation panel 11 installed above the plant 1.

  The photovoltaic power generation panel 11 is supported by a support unit 10 installed on the ground. From the viewpoint of reducing the amount of sunlight that is radiated to the plant 1, the support portion 10 is preferably a frame-shaped member that includes only columns and beams.

  The photovoltaic power generation panel 11 is installed so as to be rotatable with respect to the support unit 10 via the posture changing unit 12 (see FIGS. 5 to 8). Therefore, the posture of the photovoltaic power generation panel 11 can be changed by the posture changing unit 12. In the present embodiment, the posture changing unit 12 can rotate the photovoltaic power generation panel 11 by a predetermined angle around one rotation axis. When the attitude of the photovoltaic power generation panel 11 is changed, the incident angle of sunlight on the photovoltaic power generation panel 11 changes. Therefore, the control unit 5 described later can change the amount of light received by the photovoltaic power generation panel 11 by controlling the posture changing unit 12.

  The attitude of the photovoltaic power generation panel 11 may be changed by rotation around one rotation axis as in the present embodiment, but depending on a combination of rotation around two rotation axes or rotation around three rotation axes. It may be changed. When the solar power generation panel 11 can rotate around each of the plurality of rotation axes, the postures that the solar power generation panel 11 can take can be diversified.

  In the vicinity of the plant 1 in the space below the photovoltaic power generation panel 11, an internal illuminance sensor 2A that acquires the illuminance of light irradiated on the plant 1 is provided. The internal illuminance sensor 2A acquires the illuminance of only sunlight that has passed between the photovoltaic power generation panels 11 in a normal use state. On the other hand, when LED11 mentioned later is light-emitting, the total illumination intensity of the sunlight which passed between solar power generation panels 11 and the light which LED11L emits will be acquired. This internal illuminance sensor 2 </ b> A may be attached to the plant 1. The internal illuminance sensor 2A is installed for the purpose of measuring how much illuminance light is radiated to the plant 1 when the solar power generation panel 11 blocks sunlight. Therefore, the internal illuminance sensor 2 </ b> A only needs to be provided at a position where sunlight is blocked by the solar power generation panel 11. In other words, the internal illuminance sensor 2A only needs to be provided at a position where the shadow of the solar power generation panel 11 is formed.

  In the present embodiment, the plurality of internal illuminance sensors 2A are arranged so as to be evenly distributed in the field, that is, the lower region of the photovoltaic power generation panel 11. Therefore, the average value of the plurality of internal illuminance sensors 2A can be used as the illuminance of light irradiated on the plant 1. According to this, it is possible to obtain the average illuminance of the entire region below the photovoltaic power generation panel 11. Further, if a large number of internal illuminance sensors 2A are installed so as to be evenly distributed throughout the field, it is possible to prevent problems caused by differences in illuminance depending on the installation positions of the internal illuminance sensors 2A. That is, it is possible to prevent the problem of variation in measured illuminance due to the length of time for which the shadow of the solar power generation panel 11 is formed.

  An external illuminance sensor 2 </ b> B is provided outside the space below the photovoltaic power generation panel 11. Since the external illuminance sensor 2B is provided at a position where the sunlight is not blocked by the photovoltaic power generation panel 11, the value of the illuminance of the sunlight itself can be acquired. The internal illuminance sensor 2A and the external illuminance sensor 2B may be in the form of an outdoor field server as long as the illuminance value can be acquired. In FIG. 1, the external illuminance sensor 2 </ b> B is provided on the side of the space below the solar power generation panel 11. However, the external illuminance sensor 2 </ b> B may be provided in the space above the solar power generation panel 11 as long as sunlight is not blocked by the solar power generation panel 11.

  The farm field management apparatus 50 includes a control unit 5 that controls the posture changing unit 12 described above. Communication means 4 is provided between each of the internal illuminance sensor 2 </ b> A and the external illuminance sensor 2 </ b> B and the control unit 5. The control unit 5 receives illuminance data acquired by each of the internal illuminance sensor 2 </ b> A and the external illuminance sensor 2 </ b> B via the communication unit 4. Further, a communication unit 6 is provided between the control unit 5 and the posture changing unit 12. The communication means 6 is for transmitting a control signal from the control unit 5 to the attitude changing unit 12. The communication means 4 and 6 are preferably wireless communication means. The communication means 4 and 6 are preferably, for example, a 920 MHz band radio or a wireless LAN (Local Area Network). This is because wireless communication can realize a wide range of reception area compared to wired communication, and is easy to construct and manage.

  The field management device 50 according to the present embodiment includes an illuminance data storage unit 9 that stores information related to the growth of the plant 1. In the present embodiment, the illuminance data storage unit 9 is provided separately from the control unit 5, but may be physically integrated with the control unit 5. Further, the illuminance data storage unit 9 may be capable of giving illuminance information to the control unit 5 via an electrical information communication network such as the Internet. As shown in FIG. 2, the illuminance data storage unit 9 is preliminarily inputted with data relating to the reference illuminance and the reference day length necessary for the growth of the plant to be cultivated. In FIG. 2, for example, the reference illuminance (photosynthetic light flux density) and the reference day length necessary for the growth of the plant p are 8929Lx (150 ppfd) and P time, respectively.

  The reference illuminance is illuminance corresponding to the light saturation point. The light saturation point means an amount of light that does not contribute to the growth of a plant even if a larger amount of light is irradiated to the plant. The amount of light corresponds to the illuminance. Therefore, the reference illuminance is an illuminance that does not contribute to the growth of the plant, even if light with higher illuminance is irradiated on the plant.

  The day long time is a total value of time periods in which light having an illuminance equal to or higher than the reference illuminance in one day (24 hours) is irradiated on the plant. The day length is a value of a time zone continuously counted when light having a reference illuminance or higher is continuously irradiated on the plant. On the other hand, during daylight hours, when light with an illuminance greater than the reference illuminance and light with an illuminance smaller than the reference illuminance are alternately irradiated to the plant, the light with the illuminance greater than the reference illuminance is irradiated to the plant. This is the sum of multiple time zones. For example, the illuminance acquired by the sensor may change from illuminance greater than the reference illuminance to illuminance smaller than the reference illuminance, and then return to illuminance greater than the reference illuminance again. In this case, the day long time is a total value of two time zones in which the illuminance is higher than the reference illuminance.

  The reference day length is a day length necessary for sufficient growth of a specific plant. This reference day length is a time determined as necessary for sufficient growth of the plant by conducting a plant growth experiment.

  In the present embodiment, illuminance is used as an index representing the intensity of sunlight. However, instead of illuminance, a value expressed in other units such as photosynthetic photon flux density (PPFD) may be used as an index representing the intensity of sunlight.

  The control unit 5 can be accessed from another remote control device 15 via an electric information communication network such as the Internet 20 and the cloud computing system 30. Therefore, the field management device 50 according to the present embodiment is used in a field management system that can be monitored and controlled remotely by the remote control device 15 such as a personal computer or a mobile phone terminal via the Internet 20 and the cloud computing system 30. May be.

  Furthermore, in the field management system of the present embodiment, the electric power generated by the solar power generation panel 11 is sent to the warehouse / agricultural house / plant factory 8 through the power line 3. In this warehouse / agricultural house / plant factory 8, the generated electric power may be consumed. Furthermore, surplus power out of the power generated by the solar power generation panel 11 may be sold to an electric power company or the like via the power line 3.

  Next, with reference to FIG. 3 and FIG. 4, the relationship between plant growth, illuminance, and day length in clear weather and cloudy weather will be described.

  In general, in the case of fine weather, the relationship between plant growth, illuminance, and day length is as shown in FIG. In FIG. 3, light having an illuminance equal to or higher than the reference illuminance is irradiated on the plant during a period between the time specified by the symbol a and the time specified by the symbol d in 24 hours a day. Moreover, in FIG. 3, the light quantity corresponding to the area | region enclosed by the code | symbol a, the code | symbol b, the code | symbol c, and the code | symbol d is a light quantity which a plant requires. As can be seen from FIG. 3, in general, in the case of fine weather, a long day time (reference day long time) sufficient for plant growth is secured.

  On the other hand, the light corresponding to the area indicated by hatching in FIG. 3, that is, the light corresponding to the amount of light larger than the light saturation point is surplus light. This extra light does not contribute to plant growth. Even if this surplus light is used for power generation in the solar power generation panel 11, it does not adversely affect the growth of the plant. Therefore, the field management device 50 according to the present embodiment performs power generation using surplus light corresponding to the area indicated by hatching in FIG. Details of the method of using this surplus light for solar power generation will be described later.

  On the other hand, in cases other than fine weather, that is, in the case of cloudy or rainy weather, as shown in FIG. 4, there may be a case where the amount of light necessary for plant growth cannot be obtained from sunrise to sunset. In such a case, in order to allow the plant to grow sufficiently, in the field management device 50 according to the present embodiment, as shown in FIGS. An LED 11L is provided. The LED 11L emits light using electricity generated by the solar power generation panel 11. The LED 11L is for giving the plant 1 a light amount corresponding to the difference between the light amount necessary for the growth of the plant 1 and the light amount of sunlight at that time when the illuminance of sunlight is less than the reference illuminance. It is. Note that the light source for compensating for the shortage of sunlight may be provided in a portion other than the solar power generation panel 11 as long as the plant 1 can be irradiated with light. For example, as illustrated in FIGS. 5 to 8, the LED 10 </ b> L may be provided on the support unit 10 of the farm field management device 50. The LED 10L may emit light using the power generated by the solar power generation panel 11, but may emit light using other power.

  FIG. 5 is a diagram showing the minimum amount light receiving posture of the photovoltaic power generation panel 11 at a specific time. According to the minimum amount light receiving posture of the photovoltaic power generation panel 11, the traveling direction of sunlight and the main surface of the photovoltaic power generation panel 11 are parallel. In this state, the photovoltaic power generation panel 11 has the smallest amount of blocking sunlight. The minimum amount light receiving posture of the photovoltaic power generation panel 11 is a posture for irradiating the plant 1 with as much sunlight as possible when the reference illuminance of sunlight is not satisfied. The minimum amount light receiving posture of the solar power generation panel 11 is a posture where the light reception amount of the solar power generation panel 11 is the smallest at the time of the day at the place. Conversely, the minimum amount light receiving posture of the photovoltaic power generation panel 11 is a posture in which the amount of sunlight irradiated to the plant 1 is the largest. This can also be called the maximum amount light receiving posture of the plant 1.

  Data for causing the photovoltaic power generation panel 11 to be in the minimum amount light receiving posture of the photovoltaic power generation panel 11 is referred to as minimum amount light receiving posture control data. This minimum amount light receiving posture control data is stored in the storage unit of the control unit 5. The control unit 5 controls the posture changing unit 12 using the minimum received light amount posture control data when the other control posture is not taken. In this case, the control unit 5 changes the posture changing unit 12 according to the passage of time so that the solar power generation panel 11 becomes the minimum amount light receiving posture of the solar power generation panel 11 at the time of the day at the place. Control.

  FIG. 6 is a diagram illustrating the maximum amount light receiving posture of the photovoltaic power generation panel 11 at a specific time. The maximum light receiving posture of the solar power generation panel 11 is to irradiate the solar power generation panel 11 with as much sunlight as possible when the day length of the plant 1 is longer than the reference day length. Is the attitude. According to the maximum amount light receiving posture of the photovoltaic power generation panel 11, the photovoltaic power generation panel 11 can maximize the amount of received light at the time and the time of the day. According to the maximum light receiving posture of the photovoltaic power generation panel 11, in FIG. 6, the traveling direction of sunlight indicated by an arrow and the direction of the normal line of the photovoltaic power generation panel 11 are parallel. That is, in FIG. 6, the traveling direction of sunlight and the main surface of the photovoltaic power generation panel 11 intersect perpendicularly. In this state, the photovoltaic power generation panel 11 has the largest amount of blocking sunlight. That is, the solar power generation panel 11 receives the most sunlight. In other words, the maximum light receiving posture of the photovoltaic power generation panel 11 is a posture in which the amount of sunlight irradiated to the plant 1 at the time is the smallest. This can also be called the minimum amount light receiving posture of the plant 1.

  However, the posture shown in FIG. 6 is an example of the maximum received light amount posture of the photovoltaic power generation panel 11. Since the photovoltaic power generation panel 11 of the present embodiment can rotate only around one axis, it takes the posture shown in FIG. In the solar power generation panel 11 according to the present embodiment, the traveling direction of sunlight and the direction of the normal line of the solar power generation panel 11 are not parallel in the time zone other than the time in the middle of the south. However, the maximum amount light receiving posture of the photovoltaic power generation panel 11 when the photovoltaic power generation panel 11 can rotate around each of two or more axes is different from the above. In this case, depending on how the photovoltaic power generation panel 11 is arranged, the traveling direction of sunlight and the main surface of the photovoltaic power generation panel 11 can intersect perpendicularly for a considerable amount of time.

  Data for realizing the maximum amount light receiving posture of the photovoltaic panel 11 is set as the maximum amount light receiving posture control data. The maximum amount light receiving posture control data is stored in the storage unit of the control unit 5. The control unit 5 uses the maximum amount of light reception posture control data so that the photovoltaic panel 11 reaches the maximum amount of light reception posture of the photovoltaic panel 11 at the time of the day at the place. Accordingly, the posture changing unit 12 is controlled.

  FIG. 7 is a diagram illustrating an appropriate amount light receiving posture of the photovoltaic power generation panel 11. According to the appropriate amount light receiving posture of the photovoltaic power generation panel 11, the photovoltaic power generation panel 11 receives as much sunlight as possible while irradiating the plant 1 with sunlight having an illuminance equal to or higher than the reference illuminance. In other words, the appropriate amount light receiving posture of the photovoltaic power generation panel 11 is a posture in which the irradiation amount of sunlight to the plant 1 at that time of the day at the place becomes the reference illuminance. This can also be referred to as a reference illuminance light receiving posture of the plant 1. Control for the above-described proper amount light receiving posture of the photovoltaic power generation panel 11 will be described later.

  The posture relationship shown in FIGS. 5 to 7 is as follows.

  When the control unit 5 increases the amount of sunlight received by the photovoltaic power generation panel 11 from the minimum value to the maximum value, that is, when the amount of sunlight irradiated to the plant 1 is decreased from the maximum value to the minimum value. is there. In this case, the photovoltaic power generation panel 11 sequentially changes from the posture shown in FIG. 5 to the posture shown in FIG. 6 through the posture shown in FIG.

  On the other hand, when the control unit 5 decreases the amount of sunlight received by the photovoltaic power generation panel 11 from the maximum value to the minimum value, that is, when the amount of sunlight irradiated to the plant 1 is increased from the minimum value to the maximum value. There is. In this case, the photovoltaic power generation panel 11 sequentially changes from the posture shown in FIG. 6 to the posture shown in FIG. 5 through the posture shown in FIG.

  FIG. 8 is a diagram illustrating a state in which the solar power generation panel 11 is in the lighting posture. According to this illumination posture, the ground and the solar power generation panel 11 are parallel. In this state, the light of the LED 11L arranged on the back side of the photovoltaic power generation panel 11 is effectively used. This illumination posture is a posture for making it convenient for a worker to work on the lower side of the photovoltaic power generation panel 11 when the illuminance is extremely low at night or the like. In order to change the position of the photovoltaic power generation panel 11 to the lighting position, a switch operation of an operator is required.

  Next, the process which the control part 5 of the agricultural field management apparatus 50 of this Embodiment performs is demonstrated using FIGS. 9-11. In FIG. 9, the control flow of the attitude | position change process which determines what attitude | position the solar power generation panel 11 takes is shown. In FIG. 10, the solar power generation panel 11 shows a control flow of an appropriate received light amount posture process for receiving as much sunlight as possible while allowing the plant 1 to receive sunlight necessary for growth. . In FIG. 11, the control flow of the process at the time of light emission performed when LED10L and LED11L are lighted is shown.

  First, the posture change process will be described with reference to FIG. As shown in FIG. 9, in step S1, the total time of day length from the sunrise time to the present is integrated. The day length is the total value of the time period in which the illuminance value acquired by the internal illuminance sensor 2A is equal to or higher than the light saturation point. This day length may be accumulated continuously or intermittently. The acquisition of illuminance by the internal illuminance sensor 2A will be described later.

  After that, in step S2, if the accumulated day long time value is larger than the reference day long time value stored in the illuminance data storage unit 9, the process of step S3 is executed. In step S <b> 3, the control unit 5 causes the posture changing unit 12 to change the posture of the solar power generation panel 11 to the maximum amount light receiving posture of the solar power generation panel 11 (see FIG. 6). In other words, in step S3, the control unit 5 causes the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 so that the amount of sunlight irradiated to the plant 1 at that time becomes the smallest. That is, in step S3, the posture of the photovoltaic power generation panel 11 is changed to the minimum amount light receiving posture of the plant 1 (see FIG. 6). According to the above-described maximum light receiving posture of the photovoltaic power generation panel 11, the amount of sunlight generated on the plant 1 is minimized while the photovoltaic power generation amount is maximized.

  Thereafter, in step S9, it is determined whether or not the next morning reference time has come. If the next morning reference time is not reached in step S9, the maximum amount light receiving posture process of the solar power generation panel 11 in step S3 is continued. That is, when the accumulated day length becomes equal to or greater than the reference day length, the control unit 5 considers that it is not necessary to irradiate the plant with sunlight thereafter on that day. Thereby, the control unit 5 changes the posture of the photovoltaic power generation panel 11 to the posture changing unit 12 from the time when the accumulated day length becomes equal to or more than the reference day time to the reference time of the next morning. It is maintained in the state of the maximum amount light receiving posture (see FIG. 6). In other words, in step S3, the control unit 5 causes the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 to the posture in which the amount of sunlight irradiated to the plant 1 at that time is the smallest, that is, the plant 1. It is maintained in the state of the minimum amount light receiving posture (see FIG. 6).

  On the other hand, if it is the next morning reference time in step S9, the processing from step S1 onward is executed. That is, the control unit 5 considers that the next day has started, and starts a new control from step S1. In the present embodiment, the next morning reference item is the sunrise time.

  In step S <b> 2, if the accumulated day length value is smaller than the reference day length value stored in the illuminance data storage unit 9 in the control unit 5, the control unit 5 prioritizes sunlight over the plant 1. Is considered necessary to be irradiated. In other words, the control unit 5 considers that it is necessary to limit the amount of sunlight received by the photovoltaic power generation panel 11. Therefore, the control part 5 acquires the illumination intensity of the external illumination intensity sensor 2B in step S4. At this time, the illuminance value acquired by the external illuminance sensor 2B is the illuminance value itself of sunlight. Next, in step S5, the reference illuminance (light saturation point) data stored in the illuminance data storage unit 9 is compared with the illuminance data actually acquired by the external illuminance sensor 2B.

  In step S <b> 5, if the illuminance of the external illuminance sensor 2 </ b> B is greater than or equal to the reference illuminance, the control unit 5 considers that the illuminance of sunlight is greater than or equal to the illuminance necessary for the growth of the plant 1. Therefore, the control part 5 considers that the attitude | position of the solar power generation panel 11 needs to be changed so that the amount of the sunlight which the solar power generation panel 11 is receiving becomes an appropriate value. Therefore, the control part 5 makes the attitude | position change part 12 change the attitude | position of the photovoltaic power generation panel 11 into the appropriate amount light receiving attitude | position (refer FIG. 7) of the photovoltaic power generation panel 11. FIG. As described above, the “appropriate amount of light receiving posture of the photovoltaic panel 11” means that the photovoltaic panel 11 is irradiated with light having an illuminance that is higher than the reference illuminance required for the plant 1 while the plant 1 is irradiated with light. The attitude is to receive as much sunlight as possible. At this time, the attitude of the photovoltaic power generation panel 11 is changed so as to receive the maximum amount of sunlight within a range that does not inhibit the growth of the plant 1. That is, the attitude of the photovoltaic power generation panel 11 is changed to the reference illuminance light receiving attitude of the plant 1 (see FIG. 7). Details of the appropriate amount light receiving process of the solar power generation panel 11 in step S6 will be described later.

  On the other hand, in step S5 described above, if the illuminance of the external illuminance sensor 2B is smaller than the reference illuminance value, the control unit 5 considers that it is necessary to irradiate the plant 1 with as much sunlight as possible. In other words, the control unit 5 considers that the amount of sunlight received by the photovoltaic power generation panel 11 needs to be minimized. Thereby, the control part 5 performs the process for the minimum amount light receiving attitude | position of the photovoltaic power generation panel 11 in step S7. As described above, the “minimum light receiving attitude of the photovoltaic power generation panel 11” is an attitude in which the photovoltaic power generation panel 11 receives the least amount of sunlight. In other words, in step S7, the attitude of the photovoltaic power generation panel 11 is changed to the maximum amount light receiving attitude of the plant 1 (see FIG. 5). Next, in step S8, an LED lighting process is executed. Details of the LED lighting process in step S8 will be described later.

  Next, the process for the appropriate amount light receiving posture of the photovoltaic power generation panel 11 will be specifically described with reference to FIG. As shown in FIG. 10, in the appropriate amount light receiving posture process, in step S61, the control unit 5 acquires the illuminance of the internal illuminance sensor 2A. Next, in step S62, it is determined whether or not the illuminance of the internal illuminance sensor 2A is equal to or higher than the reference illuminance. That is, it is determined whether or not the plant 1 is irradiated with light having an illuminance greater than that required for the growth of the plant 1. In other words, the control unit 5 determines whether or not the amount of sunlight received by the solar power generation panel 11 exceeds the maximum value that the solar power generation panel 11 may receive. In step S62, if the illuminance of the internal illuminance sensor 2A is equal to or higher than the reference illuminance, it is considered that the plant 1 is irradiated with light having an illuminance necessary for the growth of the plant 1. In other words, the control unit 5 considers that the amount of sunlight received by the photovoltaic power generation panel 11 is not more than an appropriate value. If the illuminance of the internal illuminance sensor 2A is equal to or higher than the reference illuminance in step S62, it is determined in step S63 whether or not the illuminance of the internal illuminance sensor 2A is the same as the reference illuminance. In step S63, if the illuminance of the internal illuminance sensor 2A is the same as the reference illuminance, it is considered that the attitude changing unit 12 does not need to change the attitude of the photovoltaic power generation panel 11, and the process of step S1 is executed. That is, since the plant 1 is irradiated with light having the same illuminance as the reference illuminance, the attitude of the solar power generation panel 11 is maintained. That is, the posture of the photovoltaic power generation panel 11 is maintained in the state of the reference illuminance receiving posture of the plant 1 (see FIG. 7). On the other hand, if the illuminance of the internal illuminance sensor 2A is not the same as the reference illuminance in step S63, the illuminance of the internal illuminance sensor 2A is greater than the reference illuminance. That is, the plant 1 is irradiated with excess light that does not contribute to the growth of the plant 1. Therefore, the control part 5 considers that it is a desirable state for the photovoltaic power generation panel 11 to receive surplus light among the light irradiated to the plant 1. In other words, the control unit 5 considers that the solar power generation panel 11 should be irradiated with excess light unnecessary for the growth of the plant 1 and used for power generation. Therefore, in step S64, the control unit 5 controls the posture changing unit 12 to rotate the photovoltaic power generation panel 11 by an angle + α in a direction in which the amount of received light of the photovoltaic power generation panel 11 increases. That is, the control unit 5 causes the posture changing unit 12 to change the posture of the solar power generation panel 11 to a posture in which the solar power generation panel 11 can receive sunlight slightly more than the current posture. In other words, the control part 5 makes the attitude | position change part 12 change the attitude | position of the photovoltaic power generation panel 11 so that the quantity of the light currently irradiated to the plant 1 may be decreased. This is because the illuminance of the light irradiated on the plant 1 is larger than the reference illuminance, so that the photovoltaic power generation panel 11 can irradiate surplus light of the light irradiated on the plant 1. It is. When the process of step S64 is repeated continuously, the amount of light received by the photovoltaic power generation panel 11 gradually increases. In other words, the amount of light irradiated on the plant 1 gradually decreases.

  Next, in step S65, the control unit 5 acquires the illuminance of the internal illuminance sensor 2A after the photovoltaic power generation panel 11 changes its posture. Thereafter, in step S66, it is determined again whether the illuminance of the internal illuminance sensor 2A is equal to or higher than the reference illuminance. That is, it is determined whether or not the sunlight irradiating the plant 1 is maintained at or above the reference illuminance even after the posture change. In other words, the control unit 5 determines whether or not the amount of light received by the photovoltaic power generation panel 11 is greater than the allowable amount of received light due to the change in attitude of the photovoltaic power generation panel 11. . In step S66, if the illuminance of the internal illuminance sensor 2A is equal to or higher than the reference illuminance, it is assumed that the plant 1 is irradiated with light having the illuminance necessary for the growth of the plant 1 even after the posture change, and again shown in FIG. The process of step S1 is executed.

  On the other hand, if the illuminance of the internal illuminance sensor 2A is smaller than the reference illuminance in step S66, in step S67, the received light amount of the solar power generation panel 11 is decreased and the solar power generation panel 11 is rotated in the direction by the angle −α. At this time, it is considered that the plant 1 is no longer irradiated with light having an illuminance necessary for the growth of the plant 1 due to the change in posture immediately before. In other words, the control unit 5 considers that the amount of light received by the solar power generation panel 11 exceeds the allowable amount of light received by the solar power generation panel 11. That is, it is considered that the growth of the plant 1 is adversely affected by the posture change. Therefore, the control part 5 controls the attitude | position change part 12 so that the reduction | decrease of the sunlight irradiated to the plant 1 may be offset. Thereby, the attitude changing unit 12 returns the attitude of the photovoltaic power generation panel 11 to the original attitude in which the photovoltaic power generation panel 11 receives sunlight slightly less than the current attitude. In other words, the posture of the solar power generation panel 11 is returned to the posture before one stage so that the amount of sunlight irradiated to the plant 1 is slightly increased. When the process of step S67 ends, the process of step S1 shown in FIG. 9 is executed again. When the process of step S67 is repeated continuously, the amount of light received by the photovoltaic power generation panel 11 gradually decreases, in other words, the amount of light irradiated on the plant 1 gradually increases.

  Note that the solar power generation panel 11 may repeat the operation of rotating by the angle + α in step S64 described above and the operation of rotating by the angle −α in step S67. Therefore, if there is no change in the illuminance value acquired by the internal illuminance sensor 2A, the photovoltaic power generation panel 11 may vibrate in small increments by repeating the rotation in the positive direction and the rotation in the negative direction. Therefore, it is preferable that the absolute value of the angle α is changed so as to gradually decrease from the initial setting value when Step S64 and Step S67 are repeated continuously. Further, if the reference illuminance value is one point, a situation in which step S64 and step S67 are repeated continuously often occurs. Therefore, it is desirable to set the reference illuminance value within a certain range. According to this, small vibrations caused by repetition of the positive rotation and the negative rotation of the photovoltaic power generation panel 11 are prevented from continuing for a long time.

  In step S62 described above, if the illuminance of the internal illuminance sensor 2A is smaller than the reference illuminance, the control unit 5 considers that the plant 1 is not irradiated with light having the illuminance necessary for growth. Therefore, the control unit 5 considers that it is necessary to irradiate the plant 1 with more sunlight. In other words, the control unit 5 considers that the solar power generation panel 11 needs to be irradiated with less sunlight. Therefore, first, in step S68, whether or not the posture of the photovoltaic power generation panel 11 is the minimum amount light receiving posture (see FIG. 5) of the photovoltaic power generation panel 11, that is, the maximum amount light receiving posture of the plant 1. It is determined whether or not. If the attitude | position of the photovoltaic power generation panel 11 is the minimum amount light reception attitude | position of the photovoltaic power generation panel 11, this will change the quantity of the light irradiated to the plant 1 by the further change of the attitude | position of the photovoltaic power generation panel 11. This is because it cannot be increased. In step S68, if the photovoltaic power generation panel 11 is not in the minimum light receiving posture of the photovoltaic power generation panel 11, the process of step S67 is executed. Thereby, the attitude | position of the photovoltaic power generation panel 11 is changed so that the light reception amount of sunlight may be decreased. In other words, the control unit 5 causes the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 so as to increase the amount of sunlight irradiated to the plant 1. On the other hand, in step S68, if the posture of the photovoltaic power generation panel 11 is the minimum amount light receiving posture of the photovoltaic power generation panel 11, the control unit 5 cannot further increase the amount of light irradiated to the plant 1. The process of step S1 is executed again. In other words, the control unit 5 considers that the amount of sunlight irradiated to the plant 1 is the maximum amount at that time, and makes the posture changing unit 12 have the posture of the photovoltaic power generation panel 11 (see FIG. 5). To maintain.

  Next, the LED lighting process will be described with reference to FIG. As shown in FIG. 11, in the LED lighting process, first, in step S <b> 80, a process for maintaining the attitude of the photovoltaic power generation panel 11 in the state of the minimum received light quantity attitude of the photovoltaic power generation panel 11 (see FIG. 5). Is executed. In other words, the process for maintaining the posture of the photovoltaic power generation panel 11 in the state of the maximum amount light receiving posture of the plant 1 (see FIG. 5) is continued. The reason why the process of step S80 is necessary is that the sun moves with time. More specifically, in the LED lighting process, the attitude of the photovoltaic power generation panel 11 is the minimum amount light receiving attitude of the photovoltaic power generation panel 11 corresponding to the position of the sun at each time as time passes ( It is continuously changed to FIG. In other words, in the LED lighting process, the posture of the photovoltaic power generation panel 11 continues to be changed to the maximum amount light receiving posture (FIG. 5) of the plant 1 corresponding to the position of the sun at each time as time passes. . That is, the control unit 5 continues the control for causing the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 separately from the control for turning on the LED in the entire period during which the LED lighting process is performed. Is going. The process of step S80 is repeatedly executed until the process of changing the attitude of the photovoltaic power generation panel 11 to another attitude (step S3 or S6) is performed after the LED is turned off (step S91 or S89). .

  In step S81, the illuminance of light irradiated on the plant 1 is acquired by the internal illuminance sensor 2A. Next, in step S82, the reference illuminance data stored in the illuminance data storage unit 9 of the control unit 5 is compared with the illuminance data actually acquired by the internal illuminance sensor 2A.

  If the illuminance of the internal illuminance sensor 2A is smaller than the reference illuminance in step S82, the control unit 5 considers that it is necessary to compensate for the shortage of sunlight, and in step S83, the output of the LEDs 10L and 11L is a predetermined amount β. Only increase. That is, the control part 5 starts the process for supplementing the shortage of sunlight with an artificial light source. Thereby, the internal illuminance sensor 2A acquires the total illuminance of the illuminance of sunlight and the illuminance of the LED as the artificial light source. The process of increasing the outputs of the LEDs 10L and 11L in steps S81 to S83 by a certain amount is repeated until the illuminance value acquired by the internal illuminance sensor 2A exceeds the reference illuminance. In other words, the illuminance of the LED is increased until the total value of the illuminance of sunlight and the illuminance of the LED becomes equal to or higher than the reference illuminance of the plant 1, that is, until the plant 1 is irradiated with light having the illuminance necessary for growth. Processing is executed.

  In addition, in this Embodiment, LED11L provided in the back surface of the photovoltaic power generation panel 11 is toward the plant 1 when the photovoltaic power generation panel 11 has taken the minimum light reception attitude | position of the photovoltaic power generation panel 11. The posture is changed so as to emit light. That is, the attitude of the LED 11L with respect to the photovoltaic power generation panel 11 is changed so as to irradiate light downward. According to this, it becomes possible to irradiate more light to the plant 1 with less power consumption of the LED 11L.

  On the other hand, if it is determined in step S82 that the illuminance of the internal illuminance sensor 2A is equal to or greater than the reference illuminance value, further increase in the output of the LEDs 10L and 11L is considered unnecessary. Accordingly, in step S84, processing for maintaining the current illuminance is executed. Specifically, in step S84, the outputs of the LEDs 10L and 11L are adjusted so that the illuminance of the internal illuminance sensor 2A becomes the reference illuminance + γ. In other words, the outputs of the LEDs 10L and 11L are adjusted so that the expression (illuminance of the LEDs 10L and 11L = illuminance of the internal illuminance sensor 2A−reference illuminance−γ) is established. That is, the outputs of the LEDs 10L and 11L are adjusted so that the illuminance acquired by the internal illuminance sensor 2A slightly exceeds the reference illuminance but does not significantly exceed the reference illuminance. Note that γ is an adjustment value for ensuring that the illuminance of the light actually irradiated to the plant 1 always exceeds the reference illuminance by a certain amount. The process in step S84 is a process for adjusting the illuminance of the light emitted from the LEDs 10L and 11L in response to the increase or decrease in the intensity of sunlight caused by the change in weather. According to this process, useless power usage of the LEDs 10L and 11L is suppressed.

  Next, in step S85, the total time of day length from sunrise to the present stage is integrated. Thereafter, in step S86, if the value of the accumulated day length is larger than the value of the reference day length, the control unit 5 regards that the day length necessary for the plant 1 has already passed, and in step S91. The LEDs 10L and 11L are turned off. Subsequently, in step S3, the control unit 5 causes the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 to the maximum amount light receiving posture of the photovoltaic power generation panel 11 (see FIG. 5), that is, the minimum amount light receiving posture of the plant 1. To change. That is, if the control part 5 determines that it is not necessary to further irradiate the plant 1 with sunlight on that day, it stops the light emission of the artificial light source and then maximizes the power generation amount of the solar power generation panel 11. Start control for.

  On the other hand, if the accumulated daily long time value is smaller than the reference daily long time value in step S86, the illuminance of the external illuminance sensor 2B is acquired in step S87. Thereafter, in step S88, the illuminance of the external illuminance sensor 2B is compared with the reference illuminance. In step S88, if the illuminance of the external illuminance sensor 2B is equal to or higher than the reference illuminance, the controller 5 can irradiate the plant 1 with sunlight having the illuminance necessary for the growth of the plant 1, and thus it is not necessary to turn on the LEDs 10L and 11L. Is considered to be. Thereby, the control part 5 turns off LED10L and 11L in step S89. That is, since the illuminance of only sunlight is equal to or higher than the illuminance necessary for growing the plant 1, the process for compensating for the shortage of the amount of sunlight due to the lighting of the LEDs 10L and 11L is completed. Thereafter, the control unit 5 performs an appropriate amount light receiving posture process in step S6 shown in FIG. That is, the control unit 5 needs to further irradiate the plant 1 with sunlight, but if it determines that the plant 1 can be irradiated with light having an illuminance necessary for only the sunlight, the control panel 5 converts excess light into the photovoltaic panel. 11 to start control for receiving.

  Next, the effect obtained by the process described with reference to FIGS. 9 to 11 will be specifically described.

  In general, a certain amount of light is required to grow plants. For example, there is a “1% rule” for tomato and paprika cultivation in the Netherlands, which is a developed country for greenhouse horticulture. This rule is that when the amount of light is measured using the leaf area index (LAI) as an index, “an increase in the amount of light of 1% is equivalent to an increase in the yield of 1%”.

  On the other hand, the aforementioned light saturation point is taken into consideration for the growth of plants. If the plant is irradiated with more light than the light saturation point, excess light is irradiated to the plant. There is a need to use this surplus light for power generation. Therefore, it is extremely useful to change the attitude of the photovoltaic power generation panel so as to receive as much sunlight as possible while preventing the photovoltaic power generation panel from inhibiting the growth of plants. Also, excess light can be harmful to plants. Therefore, there is a need to prevent the plant from being irradiated with excess light.

  The above-described field management device 50 according to the present embodiment meets the aforementioned needs. That is, according to the field management device 50 of the present embodiment, it is possible to realize both the improvement of the crop cultivation efficiency and the improvement of the photovoltaic power generation efficiency. In addition, according to the field management device 50 of the present embodiment as described above, when the amount of solar radiation is insufficient due to the weather, there is a shortage of sunlight using the power stored by the photovoltaic power generation panel. Can be supplemented. Thereby, also in outdoor cultivation, the fluctuation | variation of the growth degree of the plant resulting from the fluctuation | variation of a weather can be suppressed.

  In addition, the crops include plants that prefer direct sunlight (positive plants) and plants that do not like direct sunlight (negative plants). Depending on the method of classification, plants that produce flower buds when the continuous dark period is shortened (long-day plants), plants that produce flower buds when the continuous dark period is long (short-day plants), and day lengths are used for flower bud formation. It can also be divided into unrelated plants (neutral plants).

  According to the field management device 50 of the present embodiment, the plant 1 grows in the field where the photovoltaic power generation panel 11 is installed, regardless of the kind of plant as described above. It is prevented from being inhibited by the presence of. Moreover, the growth of the plant 1 can be made highly efficient.

  It is as follows when the structure of the above-mentioned agricultural field management apparatus 50 of this Embodiment and the effect based on the structure are put together.

  (1) As shown in FIG. 1, the farm field management device 50 of the present embodiment includes a photovoltaic power generation panel 11 installed above the plant 1 and a posture changing unit 12 that changes the posture of the photovoltaic power generation panel 11. And. The field management device 50 includes an illuminance data storage unit 9 in which data of reference illuminance (see FIG. 2) corresponding to the light saturation point necessary for the growth of the plant 1 is stored. Further, the farm field management device 50 includes a control unit 5 that causes the posture changing unit 12 to change the posture of the photovoltaic power generation panel 11 based on the above-described reference illuminance data.

  According to said structure, the solar power generation panel 11 can be controlled in connection with cultivation of the plant 1. FIG.

  (2) The field management device 50 according to the present embodiment further includes an internal illuminance sensor 2A provided in the space below the photovoltaic power generation panel 11 so as to acquire the illuminance of light irradiated on the plant 1. You may have. In this case, when the illuminance of the light applied to the plant 1 is greater than the reference illuminance (NO in step S63 in FIG. 10), the control unit 5 causes the attitude changing unit 12 to change the attitude of the photovoltaic power generation panel 11 to sunlight. It is preferable to change the amount of light received by the power generation panel 11 so as to increase (step S64 in FIG. 10). Moreover, the control part 5 maintains the attitude | position of the solar power generation panel 11 in the attitude | position change part 12, when the illumination intensity of the light irradiated to the plant 1 is the same as reference | standard illumination intensity (in step S63 of FIG. 10). (Step S63 in FIG. 10 and Step S1 in FIG. 9) are preferably performed. Furthermore, when the illuminance of the light applied to the plant 1 is smaller than the reference illuminance (NO in step S66 in FIG. 10), the control unit 5 causes the attitude changing unit 12 to change the attitude of the photovoltaic power generation panel 11 to photovoltaic power generation. It is preferable to change the amount of light received by the panel 11 to be small (step S67 in FIG. 10).

  According to said structure, it can generate electric power with the solar power generation panel 11 using sunlight unnecessary for the cultivation of the plant 1. FIG.

  (3) The field management device 50 according to the present embodiment has an outer side of the space below the photovoltaic power generation panel 11 so as to obtain the illuminance of sunlight without being blocked by the photovoltaic power generation panel 11. An external illuminance sensor 2 </ b> B provided in the above may be further provided. In this case, when the illuminance of sunlight is smaller than the reference illuminance (NO in step S5 in FIG. 9), the control unit 5 causes the attitude changing unit 12 to change the attitude of the photovoltaic power generation panel 11 to the light reception of the photovoltaic power generation panel. Change the posture to a minimum amount (see FIG. 5) (step S7 in FIG. 9), or let the posture change unit 12 change the posture of the photovoltaic power generation panel 11 to the minimum amount of light received by the photovoltaic power generation panel It is preferable to maintain the state (see FIG. 5) (step S80 in FIG. 11).

  According to said structure, when the illumination intensity of sunlight is less than the illumination intensity corresponding to a light saturation point, the photovoltaic power generation panel 11 of the plant 1 is irradiated by irradiating the plant 1 with maximum sunlight. It is possible to prevent adverse effects on the growth.

  (4) The farm field management device 50 of the present embodiment preferably further includes light sources (LEDs 10L, 11L) that irradiate the plant 1 with light, as described in (3) above. In this case, it is preferable to further include an internal illuminance sensor 2 </ b> A provided in the space below the photovoltaic power generation panel 11 so as to acquire the illuminance of light irradiated on the plant 1. Moreover, the control part 5 makes a light source light-emit in the state (refer FIG. 5) in which the attitude | position of the photovoltaic power generation panel 11 is an attitude | position (refer FIG. 5) which the light reception amount of a photovoltaic power generation panel becomes the minimum. (Step S8 in FIG. 9 and step S83 in FIG. 11) are preferable. Moreover, it is preferable that the control part 5 acquires the total illumination intensity of the illumination intensity of the light of a light source, and the illumination intensity of sunlight as an illumination intensity of the light irradiated to the plant 1 (step S81 of FIG. 11). Moreover, it is preferable that the control part 5 adjusts the light emission state of a light source so that total illumination intensity becomes more than reference illumination intensity (step S84 of FIG. 11).

  According to said structure, when the illumination intensity of sunlight is less than reference | standard illumination intensity, the shortage of illumination intensity of sunlight can be supplemented with the illumination intensity of a light source.

  (5) The field management device 50 according to the present embodiment further includes an internal illuminance sensor 2A provided in the space below the photovoltaic power generation panel 11 so as to acquire the illuminance of light irradiated on the plant 1. It is preferable to provide. In this case, it is preferable that the illuminance data storage unit 9 includes reference day length data (see FIG. 2) indicating the day length required for the growth of the plant 1. Furthermore, the control part 5 calculates the total value of the time when the illumination intensity of the light irradiated to the plant 1 is equal to or higher than the reference illumination intensity as an integrated day long time (step S1 in FIG. 9, step S85 in FIG. 11). It is preferable. In addition, when the integrated daily long time is equal to or longer than the reference daily long time (YES in step S2 in FIG. 9, YES in step S86 in FIG. 11), the control unit 5 receives the amount of light received by the photovoltaic power generation panel 11. Is preferably changed (see FIG. 6), the posture changing unit 12 changes the posture of the photovoltaic power generation panel 11 (step S3 in FIG. 9, step S3 in FIG. 11).

  According to said structure, when it becomes unnecessary to irradiate light to the plant 1, the solar power generation panel 11 can be utilized most efficiently.

  (6) It is preferable that the solar power generation panel 11 includes an LED 11L as a light source provided on the back side surface of the light receiving surface of the solar power generation panel 11. The LED 11L may emit light using electricity generated by the solar power generation panel 11.

 According to said embodiment, the light of LED11L can be efficiently irradiated to the plant 1 located in the back side of the photovoltaic power generation panel 11. FIG.

 (7) As shown in FIG. 1, the field management system according to the present embodiment includes the field management device 50 according to any one of the above (1) to (6), and the electric field communication device 50 with an electric information communication network. And a remote control device 15 for remotely controlling the field management device 50.

  According to said structure, the growth state of the plant 1 can be managed remotely.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

DESCRIPTION OF SYMBOLS 1 Plant 2A Internal illumination intensity sensor 2B External illumination intensity sensor 5 Control part 9 Illuminance data storage part 11 Solar power generation panel 12 Posture change part 10L, 11L LED
15 Remote control device

Claims (7)

A photovoltaic panel installed above the plant;
A posture changing unit that changes the posture of the photovoltaic power generation panel;
Illuminance data storage unit in which data of reference illuminance corresponding to the light saturation point necessary for the growth of the plant is stored;
A field management device comprising: a control unit that causes the posture changing unit to change the posture of the photovoltaic power generation panel based on the data of the reference illuminance. In order to obtain the illuminance of the light irradiated to the plant, further comprising an internal illuminance sensor provided in the space below the solar power generation panel,
The controller is
When the illuminance of light radiated on the plant is larger than the reference illuminance, the attitude changing unit is changed to change the attitude of the photovoltaic power generation panel so that the received light amount of the photovoltaic power generation panel is increased,
When the illuminance of light irradiated on the plant is the same as the reference illuminance, the posture changing unit is allowed to maintain the posture of the photovoltaic power generation panel,
The illuminance of the light applied to the plant is smaller than the reference illuminance, and the attitude changing unit is configured to change the attitude of the photovoltaic power generation panel so that the amount of light received by the photovoltaic power generation panel is reduced. The field management apparatus according to 1. The solar power generation panel further includes an external illuminance sensor provided outside the space below the solar power generation panel so as to obtain the illuminance of the solar light without being blocked by the solar power generation panel,
When the illuminance of sunlight is smaller than the reference illuminance, the control unit causes the attitude changing unit to change the attitude of the photovoltaic power generation panel to an attitude that minimizes the amount of light received by the photovoltaic power generation panel. Or the field management apparatus of Claim 1 which makes the said attitude | position change part maintain the attitude | position of the said photovoltaic power generation panel in the state of the attitude | position in which the light reception amount of the said photovoltaic power generation panel becomes the minimum. A light source for irradiating the plant with light;
An internal illuminance sensor provided in the space below the photovoltaic power generation panel so as to obtain the illuminance of light irradiated on the plant,
The controller is
With the posture of the photovoltaic power generation panel being in a posture that minimizes the amount of light received by the photovoltaic power generation panel, the light source emits light,
As the illuminance of the light irradiated to the plant, obtain the total illuminance of the illuminance of the light of the light source and the illuminance of the sunlight,
The field management device according to claim 3, wherein the light emission state of the light source is adjusted so that the total illuminance is equal to or higher than the reference illuminance. In order to obtain the illuminance of the light irradiated to the plant, further comprising an internal illuminance sensor provided in the space below the solar power generation panel,
The illuminance data storage unit includes reference day length data indicating a day length necessary for the growth of the plant,
The controller is
Calculate the total value of the time when the illuminance of light radiated to the plant is equal to or higher than the reference illuminance, as an accumulated day length,
When the accumulated day length is equal to or greater than the reference day length, the posture changing unit is caused to change the posture of the solar power generation panel so that the amount of light received by the solar power generation panel is maximized. The agricultural field management apparatus according to claim 1. The photovoltaic panel includes a light source provided on the back side of the light receiving surface of the photovoltaic panel,
The field management device according to claim 1, wherein the light source emits light using electricity generated by the photovoltaic power generation panel. A field management device according to any one of claims 1 to 6,
A field management system comprising: a remote control device that is connected to the field management device via an electrical information communication network and that remotely controls the field management device.

Images