JP6110984B1 - Irrigation monitoring system - Google Patents

Abstract

The present invention provides an irrigation monitoring system for accurately grasping the irrigation state in a field employing solid medium cultivation using a culture medium for hydroponics. A system for monitoring the irrigation state of a large number of nourishing culture mediums 12 placed on a cultivation bench 11 installed in a cultivation house 1 for each of the nourishing culture mediums 12. A medium weight measuring device 20 is installed between the nutrient solution culture medium and the cultivation bench near the center of the western section of the field where irrigation cultivation is carried out while irrigating with the same number of irrigation tubes branched from the liquid supply pipe 13. The weight of the measured medium is stored together with the time information, and a graph is created on the monitor that correlates the change in the cumulative amount of liquid supply according to the irrigation conditions set in the irrigation control panel along the time series. To do. [Selection] Figure 1

Description

  The present invention relates to an irrigation monitoring system and a medium weight measuring device in hydroponics, particularly solid medium cultivation.

  Solid medium culture is a culture medium for hydroponics such as wood chips, coconut shells, rock wool, etc., or mixed in an appropriate ratio by adding culture soil, etc. A large number of items stored in a foamed polystyrene container are installed in the field, seedling pots are planted on the top of each culture medium, and drip tubes are placed on the seedling pots for irrigation. This is a cultivation method in which the moisture is discharged through a cut formed by cutting the side and bottom surfaces of the bag body or through a hole provided in a foamed polystyrene container. Solid medium cultivation is effective in combating bacterial wilt disease caused by soil pests, preventing the spread of disease damage, and is also attracting attention in terms of cost.

  Conventionally, a system that feeds back a detection result by a moisture sensor to irrigation control in order to appropriately perform irrigation control when employing a cultivation method using such a culture medium for hydroponics has been proposed (Patent Documents 1 to 3). etc).

JP 5-3731 (Summary, FIG. 1) JP 2002-281842 (summary, FIG. 1) JP 2006-197871 (Abstract, FIG. 3)

  Patent document 1 etc. are going to manage the whole field by feeding back the detection result of the water | moisture content sensor installed with respect to either of many culture mediums for nutrient solution cultivation in a field. If the nutrient solution cultivation method does not use a culture medium, the water level and the component concentration of the nutrient solution are constant throughout the field. However, even if the culture medium for hydroponics is in a single bag or container, the distribution of water content varies depending on the nature of the contained culture medium. For this reason, in order to make the technique of patent document 1 etc. more exact, it is necessary to select the installation location of a moisture sensor strictly, or to use many moisture sensors.

  In addition, Patent Document 1 and the like are intended to automatically control the irrigation, but the plant has a complex growth mechanism during the day, and there is a difference in the amount of sunlight and temperature locally and seasonally. Furthermore, when each farmer carries out cultivation with their own know-how, such as the balance of cultivar, shipping time, harvest amount and quality, the farmer himself accurately grasps the situation of the field rather than fully automating, For example, there is a high demand for cultivating high-quality crops by accurately dealing with weather conditions that differ from normal years.

The present invention aims to provide a sprinkling monitoring system that can accurately grasp the irrigation condition in the field that employs a hydroponic culture medium cultivation.

The irrigation monitoring system of the present invention, which has been made to achieve the above object, provides a irrigation control device for carrying out solid medium cultivation using a large number of nutrient solution culture media placed on a cultivation bench installed in a cultivation house. A system for monitoring the irrigation state in a field where irrigation is performed based on a set irrigation condition, comprising the following configuration.
(1A) For each of a large number of nutrient solution culture media placed on the cultivation bench, irrigation is performed using the same number of irrigation tubes branched from the liquid supply pipes arranged along the cultivation bench. It is structured to do.
(1B) The said field is comprised as a field which grows the plant planted in the said culture medium for hydroponics by attractive cultivation.
(1C) A medium weight measuring device is installed between a part of the medium for nutrient solution cultivation and the cultivation bench, and the weight of the medium measured by the medium weight measuring device is determined as a time. A medium weight storage means for storing information together with information is provided.
(1D) It is provided with a graph display means for generating a graph representing a change in the medium weight stored together with the time information by the medium weight storage means and displaying it on a monitor .
(1E) When the graph display means displays the change in the medium weight in a graph along the time series, the graph display means also displays the change in the supply amount cumulative value according to the irrigation conditions set in the irrigation control device. Be configured as a means.
(3) The culture medium weight measuring apparatus mounts a plurality of culture mediums for aquaculture, the installation positions of which are adjacent to the center among a large number of culture mediums for monitoring in the field. And a plurality of load cells installed at both ends of the placement unit, and configured as means for generating information for calculating the medium weight from the measurement results of the plurality of load cells. .
(4A) The culture medium weight measurement apparatus includes a base frame and a placement unit supported above the base frame so as to constitute a placement surface for the culture medium for nutrient solution cultivation.
(11A) The mounting portion includes a roof-shaped inclined portion that is inclined downward in a direction away from the center portion in the longitudinal direction, a vertical portion that extends vertically from the lower end of the inclined portion, and a lower end of the vertical portion. The drainage tub formed by the vertical portion, the horizontal portion, and the outer vertical portion, including a horizontal portion extending outward and an outer vertical portion raised upward from an end portion of the horizontal portion. Provide for the entire length of the mounting.
(11B) Between the upper horizontal portion formed so as to project outward at both ends of the mounting portion and the base frame, the lower end of the load cell is fixed to the base frame. The other end is fixed to the upper horizontal portion.

  According to the irrigation monitoring system in solid medium cultivation using the culture medium for nutrient solution cultivation of the present invention, the same culture medium for multiple nutrient cultivation mediums placed on the cultivation bench is provided with the configuration of (1A). Irrigation according to the irrigation conditions is performed. Moreover, as a result of having the structure of (1B), after a plant is attracted, the weight change of each culture medium for hydroponics respond | corresponds to the change of the moisture content which the culture medium hold | maintains. As a result, the weight measured for some of the nutrient-culture mediums according to the configuration of (1C) corresponds to the irrigation state of a large number of nutrient-culture mediums placed on the cultivation bench. The time change of the weight of the medium appearing in the graph displayed on the monitor by the configuration of) accurately represents the change in the amount of water held by each nutrient solution culture medium. This change in the amount of water reflects the irrigation conditions set in the irrigation control device. If the total amount of water supply accumulated by irrigation and the irrigation execution interval are set appropriately, the weight of the culture medium for hydroponic cultivation reaches the target amount of water immediately after the start of irrigation, and then the amount of water is reduced. The graph is maintained. On the other hand, when the setting of the irrigation conditions is inappropriate, the graph shows that the weight of the culture medium for hydroponics cannot easily reach the desired weight or is largely insufficient. At this time, in the irrigation monitoring system that also has the configuration of (1E), if the change in the accumulated liquid supply value is displayed together and the medium weight is not in the intended state, the irrigation condition (irrigation start time) It is possible to visually grasp where there is a problem in the setting of the irrigation execution interval, the setting of the liquid supply amount once, the number of times of irrigation execution, the irrigation end time, and the like. As a result, according to the irrigation monitoring system of the present invention, it is possible to give effective information when changing the setting on the irrigation control device side to the setting of the optimal irrigation condition.

Here, the irrigation monitoring system of the present invention may further include the following configuration.
(2) The culture medium weight measuring device is configured to measure the weight of a part of the culture medium for nutrient solution cultivation whose installation position is near the center among the many culture mediums for nutrient culture medium to be monitored in the field. It is installed.

  By providing such a configuration, for example, the weight of the nourishing culture medium at a position that is not susceptible to ventilation, such as the edge of a house, is measured and displayed in a graph. It is possible to reduce the error when the irrigation state is represented by the weight measurement of a part of the culture medium for hydroponics.

  As described above, the irrigation monitoring system of the present invention may only measure the weight of at least one hydroponic culture medium as a result of irrigation under the same conditions for a large number of hydroponic culture media. . However, a more accurate culture medium weight can be measured by measuring a plurality of culture mediums for hydroponics, particularly a plurality of culture mediums for hydroponics near the center.

  For example, the load cell can be installed under the mounting part, but in that case, the culture medium for weight measurement is lifted up to the height of the load cell with respect to the cultivation bench. , Stability becomes worse. On the other hand, the height can be suppressed by storing the load cell under the upper horizontal portion projecting outside the placement portion.

These irrigation monitoring systems of the present invention may further include the following configuration.
(5A) The medium weight storage means is configured as means capable of storing past history.
(5B) A history display command receiving means for receiving a history display command and a history display command receiving means for receiving a history display command when the graph display means receives a history display command. And a history graph display means for generating a history graph for a plurality of days based on the history and displaying it on the monitor.

  According to the irrigation monitoring system having such a configuration, not only the irrigation state on the current day but also the past irrigation state before the previous day can be displayed as a history graph on the monitor. It can provide farm managers with useful information to investigate the cause of inappropriate cases.

These irrigation monitoring systems of the present invention may further include at least one of the following configurations (6) and (7).
(6) A solar radiation sensor is provided, and includes a solar radiation amount storage means for storing the solar radiation amount measured by the solar radiation sensor together with time information, and the graph display means displays the change in the medium weight in a graph in time series. In this case, the solar radiation amount storage means is configured to display the change in the solar radiation amount stored together with the time information.
(7) A temperature sensor is provided, and room temperature storage means for storing the room temperature measured by the temperature sensor together with time information is provided, and the graph display means displays the change in the weight of the medium in a graph in time series. The room temperature storage means is configured to display the change in the room temperature stored together with the time information.

  According to the irrigation monitoring system having such a configuration, the cause of the problem in the change in the weight of the medium displayed on the graph is due to inappropriate setting of the irrigation conditions or due to abnormal weather on that day. It is possible to give appropriate information to judge whether or not.

  The culture medium for hydroponics placed by inclining a mounting part in the roof shape which makes the center part of a longitudinal direction a vertex becomes stable. And the drainage liquid which flowed out from the culture medium for nutrient solution cultivation can be induced | guided | derived to the full length direction of a mounting part with a drainage liquid. Further, by installing the load cell between the upper horizontal portion and the base frame outside the placement portion, the load cell can be stored without increasing the height.

  ADVANTAGE OF THE INVENTION According to this invention, the irrigation state in the field which employ | adopted the solid culture medium cultivation using the culture medium for nutrient solution cultivation can be grasped | ascertained correctly.

It is a top view of the plant | facility which employ | adopted the solid culture medium culture | cultivation using the culture medium for nutrient solution cultivation in Example 1. FIG. The facility which employ | adopted the solid culture medium culture | cultivation using the culture medium for hydroponics in Example 1 is shown, (A) is an elevation view of the principal part, (B) is an aa arrow view, (C) is b-. b arrow figure and (D) are cc arrow figure. The culture-medium weight measuring apparatus in Example 1 is shown, (A) is a front view, (B) is a side view, (C) is a side view which shows the attachment state of a load cell, (D) is a side view of a mounting part. . The irrigation monitoring system in Example 1 is shown, (A) is a schematic diagram which shows the whole structure, (B) is a perspective view which illustrates a monitor display state. It is a block diagram which shows the control system of the irrigation control equipment in Example 1. FIG. It is a flowchart which shows the content of the irrigation control which the irrigation control board performs in Example 1. FIG. The content of the memory | storage process which a monitoring system performs in Example 1 is shown, (A) is a flowchart of culture medium weight memory | storage process, (B) is a flowchart of solar radiation amount memory | storage process, (D) is a flowchart of room temperature memory | storage process. It is a flowchart which shows the content of the monitor display control (the day) which a monitoring system performs in Example 1. FIG. 6 is an explanatory diagram illustrating a display example by monitor display control (on the day) in Embodiment 1. FIG. It is a flowchart which shows the content of the monitor display control (history) which a monitoring system performs in Example 1. FIG. 6 is an explanatory diagram illustrating a display example by monitor display control (history) in Embodiment 1. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention will be described based on specific examples shown in the drawings.

  As shown in FIG. 1, as shown in FIG. 1, the cultivation house 1 is divided into two east and west sections, and 20 rows of cultivation benches 11 are installed in each section. An irrigation monitoring system that can also be employed in a large-scale solid medium cultivation facility where the medium 12 is placed will be described.

  In the cultivation facility of Example 1, from the irrigation control device 10 installed in the management ridge 2 adjacent to the cultivation house 1 to each nutrient solution cultivation medium 12 via the liquid supply piping 13 arranged to each cultivation bench 11. The drainage liquid flowing out from the nutrient solution culture medium 12 is discharged to the water channel 3 outside the house through the drainage pipe 14 arranged in the east and west of the house. Fertilizers and the like necessary for liquid supply are supplied from a liquid supply tank 15 installed in the management building 2.

  In a present Example, in the culture medium 12 for nourishing cultures exceeding 1000 in total, two nutrients installed in the center part of what was installed in the middle in 20 rows of cultivation benches 11 of a western section. A medium weight measuring device 20 is installed for the liquid culture medium 12.

  In the cultivation house 1, as shown in FIG. 2A, the cultivation bench 11 is configured such that mounting stands 11 a made of expanded polystyrene are arranged in a line. As shown in FIGS. 2 (B) to (D), the mounting table 11a is made up of horizontal beams 11c spanned between columns 11b and 11b installed at appropriate intervals so as to be arranged in a row at a predetermined height from the ground. It is installed so that the grooves of the bottom surfaces of the front and rear legs are fitted on the support pipes 11d, 11d extending in the length direction on the upper surface.

  The mounting table 11a made of Styrofoam has a groove bottom inclined downward from the rear to the front on a mounting surface constituted by a roof-like inclined surface that is inclined downward from the center toward the front and rear, respectively. In this way, a drain groove is provided so that the drained liquid flowing out from the nourishing culture medium 12 can be gathered and discharged to the basket 17 installed on the front side. The drainage fluid that has flowed out of the culture medium 12 for hydroponics is collected into the cocoon 17 through a route as indicated by a dotted line in FIGS. This basket 17 is continuous in the cultivation bench 11 of each row, and the drainage is finally discharged to the water channel 3 from the drainage pipes 14 installed on the east side and the west side of the house. In addition, the recessed part 18 which can install a CO2 supply pipe, a warm water pipe for heating, etc. is also provided between the front and rear legs.

  In this embodiment, as shown in FIG. 2 (A), a liquid supply pipe 13 is installed so as to follow the cultivation bench 11 installed so as to have a predetermined height from the ground as described above, and the entire farm field is shown in FIG. The liquid supply piping system as shown in the plan view of FIG. Moreover, the culture mediums 12 and 12 for nutrient solution cultivation are mounted so that it may become two with respect to one mounting base 11a. In addition, in the location shown with the dashed-two dotted line in FIG. 1, the culture medium weight measuring apparatus 20 is mounted on the mounting base 11a, and the culture mediums 12 and 12 for nutrient solution cultivation are mounted on it.

  In this embodiment, as shown in FIG. 2 (A), 6 seedlings are planted in each of the nourishing culture medium 12, and the stalks and vines extending from the seedlings are attracted by the attracting wire 5 installed in the house. Attracting cultivation method is used. Then, irrigation is performed by inserting the tips of irrigation tubes 13a, 13a,... Branched from the liquid supply pipe 13 into the pots 7 of each seedling. A predetermined amount of nutrient solution is supplied to the liquid supply pipe 13 by the irrigation control device 10 at a predetermined time, and irrigation of the seedlings is performed through each irrigation tube 13a. At this time, when the nutrient solution culture medium 12 has already been sufficiently supplied with water, the surplus nutrient solution flows out as drainage and is discharged to the straw 17.

  As shown in FIGS. 2 (C) and 2 (D), the medium weight measuring device 20 includes a base frame 21 placed on the upper surface of a polystyrene foam mounting table 11a, and an upper surface of the mounting table 11a above the base frame 21. And a load cell storage portion 23 for connecting the base frame 21 and the mounting portion 22 and for storing a load cell 30 for measuring the weight. I have.

  As shown in FIG. 3, the base frame 21 is formed by two base pipes 21a and 21a arranged in parallel and angle members 21b and 21b connecting both ends of the two base pipes 21a and 21a. Yes. The angle members 21b and 21b are bolted to both ends of the base pipes 21a and 21a via spacers 21d so that the end pipes 21c and 21c are formed at both ends of the base pipes 21a and 21a. . The base pipes 21a and 21a are manufactured from stainless steel square pipes.

  The mounting portion 22 is manufactured by sheet metal processing a stainless steel plate material, and has a roof-like inclined portions 22a and 22a that are inclined downward in a direction away from the central portion in the longitudinal direction, and lower ends of the inclined portions 22a and 22a. Vertical portions 22b, 22b extending vertically, horizontal portions 22c, 22c extending outward from the lower ends of the vertical portions 22b, 22b, and outer vertical portions 22d raised upward from the ends of the horizontal portions 22c, 22c, 22d. The vertical portion 22b, the horizontal portion 22c, and the outer vertical portion 22d form a drainage basin 22e extending over the entire length of the mounting portion 22.

  The load cell storage unit 23 includes an inverted L-shaped end wall 23a welded so as to close both ends of the mounting unit 22, a load cell lower fixing spacer 23b, and a load cell upper fixing spacer 23c. The base portion 21 and the mounting portion 22 are connected by fixing the load cell 30 with a bolt between the spacer 23b for fixing and the spacer 23c for fixing on the load cell.

  As shown in FIG. 3C, one end of the lower surface of the load cell 30 is bolted to the angle member 21b of the base frame 21 via the load cell lower fixing spacer 23b, and the other upper end of the load cell 30 is fixed on the load cell. It is bolted to the horizontal part of the inverted L-shaped end wall 23a of the load cell storage part 23 through the spacer 23c. By fixing the lower surface and the upper surface on the opposite side, it functions as a torsion bar, and generates a strain corresponding to the weight of the nutrient solution culture medium 12 placed on the placement unit 22. By measuring the amount of strain with a strain gauge, it is possible to measure the weight of the culture medium for hydroponics. A penetration portion as shown in FIG. 2D is formed near the center of the load cell 30, and the strain can be changed relatively sensitively to changes in weight.

  A drainage pipe 25 is attached to the lower part of the inverted L-shaped end wall 23a on the right side of the figure so as to communicate with the drainage tank 22e. Thereby, as shown with the dotted line in FIG.2 (C), (D), the drained liquid which flowed out from the culture medium 12 for nourishing cultures mounted in the mounting part 22 can be discharged | emitted to the straw 17. It is like.

  In addition, an L-shaped load cell cover 27 is attached to the horizontal portion of the inverted L-shaped end wall 23a when the load cell is attached, thereby protecting the load cell 30.

  As shown in FIG. 4 (A), the medium weight measuring device 20 includes a base unit 21, a mounting unit 22, a load cell storage unit 23, and load cells 30, 30, as shown in FIG. It has. The adder 35 is installed between the base portion 21 and the placement portion 22 so as not to increase the height of the apparatus. In this embodiment, the output signals of strain gauges attached to the load cells 30, 30 installed at both ends of the medium weight measuring device 20 are input to the adder 35, and the signals output from the adder 35 are The irrigation monitoring using the culture medium weight measurement is performed by inputting to the amplifier output device 37 and inputting from the amplifier output device 37 to the personal computer 50.

  As shown in FIG. 4B, the personal computer 50 is a general computer including a monitor 51, a keyboard 52, and a mouse 53. As shown in FIG. 4A, in addition to the signal from the amplifier output device 37, the solar radiation sensor 41 installed in the house, the temperature sensor 42, and the signal from the irrigation control panel 60 provided in the irrigation control device 10 are also included. Have been entered. And the program for performing the process which displays the irrigation monitoring graph GRF on the monitor 51 is installed as shown in FIG.4 (B).

  Next, irrigation control by the irrigation control device 10 will be described. First, as shown in FIG. 5, the irrigation control panel 60 that controls the irrigation control is divided into a time measuring unit 61 that measures the time, and a plurality of time zones at least during the day. A storage unit 62 that plays the role of a liquid supply condition setting unit for each time period that sets a liquid supply condition for each time period, a monitor 63, and an input / output unit 64 are provided, and supply of nutrient solution by the liquid supply unit 70 is executed. To do.

  In the storage unit 62 provided in the irrigation control panel 60, the optimum liquid supply for each of the time zone in which photosynthesis is gradually increased, the time zone in which photosynthesis is actively performed, and the time zone in which photosynthesis is gradually weakened. Set the amount of liquid supply for each time zone so that irrigation by volume is executed. In this embodiment, eight time zones can be set so that irrigation is not performed at night, but irrigation is performed from sunrise to sunset. And about each time slot | zone divided | segmented into these eight, about fruit vegetables, such as a tomato, the liquid supply amount per share can be set. At this time, the type of crop, the season to be cultivated (spring, summer, autumn, winter), the weather of the day (sunny, rainy, cloudy, etc.), the growth stage of the crop (immediately after planting, the time of growth enhancement, the time of flowering) It can be set arbitrarily based on the farmer's experience, taking into account the fruiting time.

  Next, the content of the irrigation control in the irrigation control panel 60 will be described based on the flowchart of FIG. When a signal indicating that the time zone 1 has been set is received from the timer 61 (S10: YES), the supply unit 70 is supplied according to the liquid supply conditions set in the time zone 1 of the storage unit 62. The liquid is commanded (S15).

  In the present embodiment, the liquid supply pump of the liquid supply unit 70 is driven for a time that satisfies the liquid supply condition from the set time. At this time, the liquid supply unit 70 opens the electromagnetic valve to the liquid supply pipe 13. Thereby, the nutrient solution adjusted to a predetermined fertilizer concentration is supplied to the liquid supply pipe 13, and the nutrient solution is supplied to the pot 7 of each seedling through the branching irrigation tube 13a.

  Here, each seedling is planted with respect to the culture medium 12 for hydroponics, in which a culture medium material such as wood chips, coconut shells, rock wool or the like is made into a slab shape and contains the culture medium. In this example, the culture medium 12 for hydroponics contains a solid material in a slab shape having a medium material width of 20 cm, a length of 100 cm, and a height of 10 cm in a plastic bag, and has a moisture content. When it is 40%, it is 8 kg, when it is 80%, it is 16 kg, and when it is 100%, it is 20 kg. The nutrient solution exceeding the holding capacity flows out from the tearing portions provided on the side surface and the bottom surface of the bag body and is discharged to the drainage pipe 14 through the trough 17.

  After that, the irrigation control panel 60 instructs the liquid supply unit 70 to supply liquid according to the liquid supply conditions set in the time zone 2 of the storage unit 62 when the set time of the time zone 2 comes (S20, S25). When the time set in time zone 3 is reached, the liquid supply unit 70 is instructed to supply liquid according to the liquid supply conditions set in time zone 3 of the storage unit 62 (S30, S35). This is repeated until the last time zone LAST, and the day's processing is completed (S80, S85).

  Next, the contents of the storage process in the personal computer 50 will be described based on the flowchart of FIG. The personal computer 50 is installed with a program configured to execute these processes at set time intervals.

  The medium weight storage process will be described. As shown in FIG. 7A, when a predetermined time has elapsed since the previous processing (S110: YES), a signal input from the amplifier output device 37 of the culture medium weight measuring device 20 is acquired (S120). Then, the medium weight is calculated from this signal (S130), and stored together with the current date and time (S140).

  The solar radiation amount storing process will be described. As shown in FIG. 7B, when a predetermined time has elapsed from the previous process (S210: YES), a signal input from the solar radiation sensor 41 is acquired (S220). Then, the amount of solar radiation is calculated from this signal (S230), and stored together with the current date and time (S240).

  The room temperature storage process will be described. As shown in FIG. 7C, when a predetermined time has elapsed from the previous process (S310: YES), a signal input from the temperature sensor 42 is acquired (S320). Then, the room temperature is calculated from this signal (S330) and stored together with the current date and time (S340).

  By repeatedly executing the above-mentioned medium weight storage process, solar radiation amount storage process, and room temperature storage process at predetermined time intervals, the medium weight, solar radiation amount, and room temperature history information in one day are accumulated. .

  Next, monitor display control (on the day) in the personal computer 50 will be described based on the flowchart of FIG. The personal computer 50 executes the monitor display regarding the irrigation status on the day unless a special instruction is given from the user from the start time (for example, midnight) to the end time (for example, 24:00) A program configured to do so is installed.

  When the start time is reached (S410: YES), the irrigation control panel 60 is requested to return the irrigation conditions for the day (S420). If there is a reply (S422: YES), the irrigation conditions on the day are stored (S424).

  And the culture medium weight of the day memorize | stored by the above-mentioned memory | storage process, the amount of solar radiation, and room temperature are read (S430). Based on these and the irrigation conditions on the day, a graph is generated that shows changes in medium weight, solar radiation amount, room temperature, and irrigation amount (cumulative value) from midnight to the current time (S440). Then, the graph is displayed on the monitor 51 (S450).

  Until the end time is reached (S460: NO), each time the update time arrives (S470: YES), the processing of S430 and subsequent steps is repeatedly executed, so that the medium weight, the amount of solar radiation, the room temperature, and the amount of irrigation (cumulative value) Is displayed on the monitor 51. For example, the same time interval as that for storing the weight of the medium or the like may be set as the update time.

  When the end time is reached (S460: YES), the graph of the day is stored (S480), and the monitor display is ended (S490).

  FIG. 9 shows a graph GFR01 when the setting of the irrigation condition is inappropriate and a graph GRF02 when the setting of the irrigation condition is appropriate as display examples executed by the monitor display control (on the day).

  In the graph GRF01 shown in FIG. 9A, the medium weight gradually decreases from midnight, and after the first irrigation is performed at 9:00 am at the irrigation start time, the medium weight increases once and then decreases slightly. After that, the weight increases and decreases at the time of irrigation. This graph GRF01 is a display example when the setting of irrigation conditions is not appropriate. Farmers can visually recognize that irrigation is inadequate by looking at this graph display, and by comparing the graph with the irrigation amount, solar radiation amount, room temperature, etc. displayed together, Useful information for changing the setting of the irrigation condition for the irrigation control panel 60 for making the irrigation condition can be obtained.

  A graph GRF02 shown in FIG. 9B is a display example when appropriate irrigation is performed. As a result of appropriate irrigation, the medium weight immediately rises to the optimum medium weight after the start of irrigation, and thereafter the optimum medium weight is maintained until the end of irrigation. This graph GRF02 allows the farmer to confirm that the current irrigation conditions are appropriate.

  Next, monitor display control (history) in the personal computer 50 will be described based on the flowchart of FIG. The personal computer 50 is installed with a program configured to inquire about a display period when a history display command is input and to perform monitor display of a history graph for the designated display period.

  This program is activated when a history display command is issued, and first displays a message screen requesting input of a display period on the monitor 51 (S510). When the display period is input (S520: YES), each graph in the display period is read (S530), and these graphs are connected in time series (S540). Then, the history graph generated by this connection is displayed on the monitor 51 (S550).

  Thereafter, when a command for display switching is made (S560: YES), it is determined whether or not the command is for changing the period (S570). If it is a period change command (S570: YES), the process returns to S510, and a history graph display for the changed period is executed.

  On the other hand, when the period is not changed (S570: NO), the graph returns to the current day graph display (S580).

  FIG. 11 shows a display example of the history graph GRF03 executed by the monitor display control (history). According to this history graph GRF03, in the state of March 24, 2016, the weight of the medium is not so much problem, and the sufficient amount of water is retained in the nourishing culture medium 12, but the subsequent setting of the irrigation conditions is appropriate. Therefore, the medium weight has decreased to the minimum water content at midnight on March 29, 2016. Therefore, after March 29, the setting of the irrigation control panel 60 was changed so as to increase the daily irrigation amount. As a result, the proper irrigation state can be restored again on March 30. .

  According to the present embodiment, irrigation according to the same irrigation conditions is performed on a large number of nutrient solution culture media 12 placed on the cultivation bench 11. Moreover, after a plant is attracted, the weight change of each culture medium 12 for hydroponics corresponds to the change in the amount of water retained in the culture medium. As a result, the weights measured for some of the culture medium for hydroponics correspond to the irrigation state of a large number of culture mediums for hydroponics placed on the cultivation bench, so the graph GRF displayed on the monitor 51 The change over time in the weight of the medium that appears is an accurate representation of the change in the amount of water held by each nutrient solution culture medium. This change in the amount of water reflects the irrigation conditions set in the irrigation control device 10. If the total amount of water supply accumulated by irrigation and the irrigation execution interval are set appropriately, the weight of the culture medium for hydroponic cultivation reaches the target amount of water immediately after the start of irrigation, and then the amount of water is reduced. The graph GRF02 in a maintained state is obtained. On the other hand, when the setting of the irrigation conditions is inappropriate, the graph GRF01 shows that the weight of the culture medium for hydroponics cannot easily reach the desired weight or is largely insufficient. As a result of the change in the accumulated liquid supply amount being displayed together, if the weight of the medium is not in the intended state, irrigation conditions (irrigation start time, irrigation execution interval, setting of one supply amount, irrigation execution) It is possible to visually grasp where the problem is in the setting of the number of times, irrigation end time, etc.). As a result, according to the irrigation monitoring system of the present embodiment, effective information can be given when changing the setting on the irrigation control device side to the setting of the optimal irrigation condition.

  Moreover, the culture medium weight measuring apparatus 20 is not a position that is not easily affected by ventilation or the like, like the end of the cultivation house 1, but two culture mediums for nourishing cultivation in which the installation positions are arranged adjacent to the center. Since the measurement results by the load cells 30 and 30 installed at both ends of the mounting portion 22 are output via the adder 35, the accurate medium weight can be measured.

  Furthermore, the culture medium culture | cultivation apparatus 20 stabilizes the culture medium for nutrient solution culture by mounting the mounting part 22 back and forth in the shape of a roof. And the drainage liquid which flowed out from the culture medium for nutrient solution cultivation is led to the basket 17 of the cultivation bench 11 via the drainage tub 22e and the drainage pipe 25, and the drainage liquid does not spill around. And since the load cells 30 and 30 are installed on the outside of the mounting portion 22 so as to be housed under the horizontal portion of the inverted L-shaped end wall 23a, the medium for hydroponics that is the object of weight measurement can be used. Therefore, it is not lifted extremely higher than the culture medium for hydroponics, and stability is not impaired.

  In addition, since not only the irrigation state on the current day but also the past irrigation state before the previous day can be displayed on the monitor 51 as the history graph GRF03, it is possible to judge whether or not the irrigation condition is set properly and to investigate the cause of the inappropriate case. Useful information can be given to farm owners. And in these graphs GRF01 etc., since the amount of solar radiation and the change of room temperature can also be displayed, the cause when there is a problem in the change of the weight of the medium is due to the improper setting of the irrigation conditions. It is possible to give appropriate information to determine whether the problem is due to the abnormal weather of the day.

  Thus, if the irrigation monitoring system of a present Example is used, the irrigation state in the field which employ | adopted the solid culture medium culture using the culture medium for nutrient solution cultivation can be grasped | ascertained correctly.

  As mentioned above, although the Example of this invention was described, this invention is not limited to an Example, Of course, a various form can be employ | adopted within the range which does not deviate from the summary.

  For example, in a system including a drainage counter, a change in drainage amount may be displayed in a graph in addition to the irrigation setting condition of the irrigation control panel. Moreover, the graph display may be only the change state of the medium weight. Furthermore, although the cultivation bench 11 is comprised using the cultivation stand 11a made from a polystyrene foam in the Example, you may use metal hanging gutters. In addition, in addition to the monitor display, a program for determining whether or not the medium weight is below a predetermined lower limit value and displaying an alarm message on the monitor 51 is displayed for the personal computer 50. May also be installed. In the embodiment, the irrigation control panel 60 for performing irrigation and the personal computer 50 for monitoring are configured as separate devices. However, the personal computer is configured as an integrated environment control computer and various commands for irrigation control are provided. Alternatively, it may be output, or conversely, the medium weight measurement result or the like may be input to the irrigation control panel side to serve as the central device of the irrigation monitoring system of the present invention.

  It can be used for hydroponics of crops in greenhouses.

  DESCRIPTION OF SYMBOLS 1 ... Cultivation house, 2 ... Management building, 3 ... Waterway, 5 ... Attraction wire, 7 ... Pot, 10 ... Irrigation control apparatus, 11 ... Cultivation bench, 11a ..Place, 11b ... Stand, 11c ... Lateral girder, 11d ... Support pipe, 12 ... Medium for nutrient solution culture, 13 ... Piping for liquid supply, 13a ... Watering tube , 14 ... Pipe for drainage, 15 ... Liquid supply tank, 17 ... Saddle, 18 ... Recessed part, 20 ... Medium weight measuring device, 21 ... Base frame, 21a ... -Base pipe, 21b ... Angle member, 21c ... End lower wall, 21d ... Spacer, 22 ... Mounting part, 22a ... Inclined part, 22b ... Vertical part, 22c ... · Horizontal portion, 22d · · · Outer vertical portion, 22e · · · drainage basin, 23 · · · Load cell storage portion, 23a · · Reverse L-shaped end wall, 23b... Load cell lower fixing spacer, 23c... Load cell upper fixing spacer, 25... Drainage pipe, 27... Load cell cover, 30. ······················ 37 ··· Amplifier output device · 41 · · · solar radiation sensor · · · 42 · · · temperature sensor · · · 50 · · · personal computer・ Mouse, 60 ... irrigation control panel, 61 ... timer, 62 ... storage unit, 63 ... monitor, 64 ... input / output unit, 70 ... liquid supply unit, GRF, GFR01 , GRF02 ... graph, GRF03 ... history graph.

Claims (4)

Monitoring the irrigation state in the field where irrigation is performed based on the irrigation conditions set in the irrigation control device when performing solid medium cultivation using a large number of nutrient solution culture media placed on the cultivation bench installed in the cultivation house An irrigation monitoring system comprising the following configuration:
(1A) For each of a large number of nutrient solution culture media placed on the cultivation bench, irrigation is performed using the same number of irrigation tubes branched from the liquid supply pipes arranged along the cultivation bench. It is structured to do.
(1B) The said field is comprised as a field which grows the plant planted in the said culture medium for hydroponics by attractive cultivation.
(1C) A medium weight measuring device is installed between a part of the medium for nutrient solution cultivation and the cultivation bench, and the weight of the medium measured by the medium weight measuring device is determined as a time. A medium weight storage means for storing information together with information is provided.
(1D) It is provided with a graph display means for generating a graph representing a change in the medium weight stored together with the time information by the medium weight storage means and displaying it on a monitor .
( 1E) When the graph display means displays the change in the medium weight in a graph along the time series, the graph display means also displays the change in the supply amount cumulative value according to the irrigation condition set in the irrigation control device. Be configured as a means .
( 3) The culture medium weight measuring apparatus mounts a plurality of culture mediums for nutrient solution culture, the installation positions of which are adjacent to each other near the center among a large number of culture mediums for nutrient solution monitoring in the field. And a plurality of load cells installed at both ends of the placement unit, and configured as means for generating information for calculating the medium weight from the measurement results of the plurality of load cells. .
( 4A) The culture medium weight measurement device includes a base frame and a placement unit supported above the base frame so as to constitute a placement surface for the culture medium for nutrient solution cultivation .
(11A) The mounting portion includes a roof-shaped inclined portion that is inclined downward in a direction away from the center portion in the longitudinal direction, a vertical portion that extends vertically from the lower end of the inclined portion, and a lower end of the vertical portion. The drainage tub formed by the vertical portion, the horizontal portion, and the outer vertical portion, including a horizontal portion extending outward and an outer vertical portion raised upward from an end portion of the horizontal portion. Provide for the entire length of the mounting.
(11B) Between the upper horizontal portion formed so as to project outward at both ends of the mounting portion and the base frame, the lower end of the load cell is fixed to the base frame. The other end is fixed to the upper horizontal portion. The irrigation monitoring system according to claim 1, further comprising the following configuration.
(5A) The medium weight storage means is configured as means capable of storing past history.
(5B) A history display command receiving means for receiving a history display command and a history display command receiving means for receiving a history display command when the graph display means receives a history display command. And a history graph display means for generating a history graph for a plurality of days based on the history and displaying it on the monitor. Moreover, irrigation monitoring system according to claim 1 or 2, characterized in that it comprises also the following configurations.
(6) A solar radiation sensor is provided, and includes a solar radiation amount storage means for storing the solar radiation amount measured by the solar radiation sensor together with time information, and the graph display means displays the change in the medium weight in a graph in time series. In this case, the solar radiation amount storage means is configured to display the change in the solar radiation amount stored together with the time information. The irrigation monitoring system according to any one of claims 1 to 3 , further comprising the following configuration.
(7) A temperature sensor is provided, and room temperature storage means for storing the room temperature measured by the temperature sensor together with time information is provided, and the graph display means displays the change in the weight of the medium in a graph in time series. The room temperature storage means is configured to display the change in the room temperature stored together with the time information.