JP2011041503A - Watering/manuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact watering/manuring device, with which a medium is divided into sections by systems to timely, adequately and efficiently perform watering and manuring in each of the sections and also which is easy to operate. <P>SOLUTION: The watering/manuring device divides a cultivation field into a plurality of systems and arranges a drip tube in each of the system fields to perform watering, manuring and cultivation. The tubular solenoid valve-attached drip tubes for the respective system fields, are branch-connected to raw water-sending pipes through a manure admixing part having a signal pulse generator-attached raw water flowmeter, a filter and a manure pump. A moisture meter, and also a watering/manuring controller operating the moisture meter and the like are set to the device. The watering/manuring controller includes: an operation display-setting part for inputting conditions necessary for performing watering and manuring, and for selecting time patterns and watering/manuring patterns and inputting conditions for the patterns; a calculation part; a storing part; a condition determining part; a control part which works with the moisture meter for the medium; and an alarm generating part calling cultivator's attention to abnormality in the device and/or requirement for maintenance of the device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an irrigation fertilizer used for irrigation and cultivation of crops.

  The facilities that are the subject of the present invention are: 1. Overflow-type solid medium cultivation in hydroponics (hereinafter referred to as hydroponics) and 2. Hydroponic cultivation in soil cultivation. In general, in hydroponic culture, fertilizer passes through the root area of a medium with low buffer capacity, so fertilizer is fed with a constant dilution rate or concentration of fertilizer, whereas in hydroponic culture, soil is used for the medium. Since the soil has buffering capacity, most of the fertilizer supplied is accumulated in the soil, so it is better to control the total input of fertilizer.

  In the conventional irrigation method, irrigation in hydroponics using upland or hydroponics in which a solid medium is used for a high platform, the irrigation amount is determined by a timer. Set and start the timer by means of starting the timer (referred to here as a time switch) and drive the irrigation pump if the irrigation source has no water pressure for the set time (minutes) to increase the water pressure and connect In hydroponic cultivation, irrigation is performed with a teardrop tube that hangs fine droplets in the field, or in hydroponic cultivation, irrigation is performed with an irrigation tube that irrigates a solid medium. When there is a certain irrigation water main, it is done by providing a branch in the water pipe and opening the solenoid valve as a branch pipe.

In general irrigation equipment for vegetable cultivation fields, the supply capacity of raw water irrigation equipment and irrigation equipment is reduced (equipment costs are reduced), or it is necessary to cultivate in separate lines. The entire area of the cultivation field is not irrigated at a time during a certain time period, and irrigation is performed by dividing it into a plurality of systems. When irrigating by dividing into multiple systems, there will be a time difference between the first irrigation system and the last irrigation system at the time of irrigation, so it is necessary to devise so that all systems can be irrigated within the scheduled time. There is.

  In order to secure the irrigation amount (L) required for one irrigation, the irrigation elapsed time (minutes) is secured by a timer and the flow rate is adjusted by the flow rate adjustment valve. However, even if it is adjusted to a predetermined value, water drops from the pores in the tear tube (especially used for hydroponic soil cultivation because of fluctuations in the water pressure of the raw water system or clogging of the filter. In order to prevent clogging, a fine filter is used, so the clogging is cheap.) Even if the irrigation time per minute (min) is the same, the flow rate drops and the required irrigation amount (L) is reduced. It cannot be secured.

  If irrigation is performed so that the planned irrigation amount is satisfied by one irrigation, if the irrigation amount of the previous system does not reach the planned amount, the irrigation time of the next system and below will not be switched to the next system. It will be shifted significantly after the irrigation time to be performed. For this reason, irrigation of each system in one irrigation is carried out with a fixed irrigation time (minutes).

  In the current method of fixing the irrigation time, irrigation is carried out in time (minutes) in one irrigation, so the irrigation amount per irrigation cannot be ensured accurately, and fluctuations in the irrigation amount are subject to irrigation fertilization (Liquid culture) It will greatly affect the water fluctuation of the medium in cultivation, and it is impossible to accurately control or grasp the irrigation amount per time. In the case of farming methods aiming at cultivation of crops, or in the case of farming methods that cultivate with little irrigation, the current methods are insufficient control and management methods.

  Teardrop tubes used for hydroponics are made of thin-film resin and are more vulnerable to mechanical damage than irrigation tubes and vinyl tubes used for hydroponics. Field work when not in operation (even if it breaks without knowing the tube, there is no water leakage because there is no pressurized water in the tube, so it will not be recognized at that time) or due to insect damage that inhabits the field ground Damage due to excessive leakage of water in the damaged area due to excessive water leakage at the damaged area, resulting in a lack of irrigation in the medium other than the damaged area of the same strain, and a significant delay in damage repair due to cognitive delays that impair crop growth, holidays, etc. It is supposed to be. Severe cases are the cause of death.

The conventional method for fertilization is a method in which the irrigation time is constant and the dilution rate is constant. Since water drops from the pores of the drip tube, a fine filter is used to prevent clogging of the pores, so it is cheaper to clog). Even if the flow rate is the same, the amount of fertilization (CC) (Equation 9) changes because the flow rate decreases and the dilution rate is controlled to be constant even if the irrigation amount (L) changes.
In the case of hydroponics cultivation using soil with strong buffering capacity, a cultivation index based on fertilizer application amount (CC / R) is preferable to dilution rate. The method for inputting the fertilizer application amount (CC / R) is described in Japanese Patent Application No. 2007-277304, but there is no description about the irrigation amount (L / R) or the dilution rate, and it is per cultivated field area (R). It is described about securing the fertilizer application amount (CC / R). This can be applied to a method where the cultivation field is expected to have a high buffering capacity for fertilizers like the soil used for hydroponics cultivation, but because the dilution rate is not controlled, filter clogging, If the amount of water is extremely low due to an irrigation pump malfunction or the like, a high concentration fertilizer solution may be temporarily applied to the root area of the cultivated product. When leaving a ground and using a fixed medium with low buffering capacity as in hydroponics, a fertilization method with a constant dilution rate is required, and a method of making the fertilization amount (CC / R) constant is not appropriate.

This inventor completed the irrigation fertilizer which satisfy | fills the said objective, solved the subject which the prior art mentioned above has, and the technical means is as the following (1)-(3) introduce | transduced. .
(1). The amount of fertilizer fertilized using a medium with strong buffering capacity that ensures irrigation amount per area and (L / Earl) fertilization amount (CC / Earl) and fertilizer fertilization with a constant fertilizer dilution rate Is a cultivation method that is expected to absorb the whole amount of water. Divide the cultivation field into multiple systems, and install a tube (infusion tube) with a small amount of irrigation in each system field unit. A device,
A water pipe that communicates with the water intake source is connected to a filter that removes foreign substances from the raw water and a signal transmission flow meter that measures the irrigation flow rate, and a fertilizer mixing section with a fertilizer pump that mixes the fertilizer is sequentially installed. The drip tube of each system field is branched and connected to the downstream pipe part of the fertilizer mixing part, and the tube solenoid valve is installed in the upstream part of the drip tube of each system field. Install a irrigation fertilizer control device,
The irrigation control device inputs the irrigation amount (L / R) required for one irrigation, inputs the irrigation area (R), inputs the scheduled irrigation time (min), and inputs the fertilizer amount (CC / R). The irrigation weighing capacity (L) to be calculated is calculated by (Equation 1).
(The following formulas are all explained per system.)

When the irrigation starts, the irrigation amount is measured by integrating the irrigation amount with a signal transmission type flow meter (pulse), and when the irrigation rain for the irrigation meter (L) of (Equation 1) is reached, the irrigation is stopped (L / R) Ensure irrigation fertilizer control device. For each fertilizer pump, input the fertilizer application amount (CC / R), input the washing amount (L) for each system, and calculate and calculate the dilution rate by (Equation 2). The calculated dilution rate is displayed on the screen for each system, and the amount of irrigation or fertilization is adjusted to ensure the necessary dilution rate.
Enter the rated driving frequency (stroke / min), enter the pump rated capacity (CC / min), enter the fertilizer pump calibration rate (%), fertilizer irrigation metering required for one driving of the fertilizer pump The soot capacity (CC) is obtained by (Equation 3).
Measure the irrigation amount with a flow meter (pulse), and when the accumulated amount reaches the fertilizer irrigation metering capacity (CC), the fertilizer solution (CC) is driven once with the fertilizer pump. Since the amount (CC) is fixed, the ratio between the irrigation amount (L) and the injected fertilizer solution (CC) is constant. The dilution rate is kept constant while securing the input irrigation amount (L / R). The irrigation fertilizer control device to control.

Calculate the number of times of fertilizer pump driving (stroke) per irrigation by (Equation 4), count the number of times the fertilizer liquid (CC) is driven by the fertilizer pump, and when the number of times of fertilizer pump driving (stroke) is reached, A irrigation fertilizer control device that secures the fertilizer application amount (CC / R) by stopping the driving of the fertilizer pump.
(2). The irrigation fertilization is performed while ensuring the irrigation amount per area and the (L / R) fertilizer dilution rate and keeping the fertilization amount (CC / R) constant.
It is a cultivation method that uses a solid medium of hydroponics and expects that nutrients with a stable composition and concentration will be supplied to the root area of fruits and vegetables using a medium with low buffering capacity and absorbed. , A irrigation fertilizer that divides the cultivation field into multiple systems, and arranges a tube with a large amount of irrigation (irrigation tube) in each system field unit to perform irrigation fertilization cultivation,
A water pipe that communicates with the water intake source is connected to a filter that removes foreign substances from the raw water and a signal transmission flow meter that measures the irrigation flow rate, and a fertilizer mixing section with a fertilizer pump that mixes the fertilizer is sequentially installed. The drip tube of each system field is branched and connected to the downstream pipe section of the fertilizer mixing section, and the tube solenoid valve is installed upstream of the irrigation tube of each system field, and each system field unit is operated. The irrigation fertilizer control device is installed, the irrigation control device inputs the irrigation amount (L / R) required for one irrigation, the irrigation area (R), the irrigation scheduled time (minutes), The irrigation weighing capacity (L) is calculated by (Equation 1).
The following formulas are all explained per system.
When the irrigation starts, the irrigation amount is measured by integrating the irrigation amount with a signal transmission type flow meter (pulse), and when the irrigation rain for the irrigation meter (L) of (Equation 1) is reached, the irrigation is stopped (L / R) Ensure irrigation fertilizer control device. For each fertilizer pump, the dilution rate is input, the cleaning amount (L) for each system is input, and the fertilizer application amount (CC / R) is calculated by (Equation 5). The calculated fertilizing amount (CC / R) is displayed on the screen for each system, and the irrigation amount or dilution rate is adjusted so that the required fertilizing amount (CC / R) can be secured.
Enter the rated driving frequency (stroke / min), enter the pump rated capacity (CC / min), enter the fertilizer pump calibration rate (%), fertilizer irrigation metering required for one driving of the fertilizer pump The soot capacity (CC) is obtained by (Equation 3).

Measure the irrigation amount with a flow meter (pulse), and when the accumulated amount reaches the fertilizer irrigation metering capacity (CC), the fertilizer solution (CC) is driven once with the fertilizer pump. Since the amount (CC) is determined, the ratio between the irrigation amount (L) and the applied fertilizer solution (CC) is constant. The dilution rate is kept constant while ensuring the input irrigation amount (L / R). The irrigation fertilizer control device to control. Calculate the number of times of fertilizer pump driving (stroke) per irrigation by (Equation 4), count the number of times the fertilizer liquid (CC) is driven by the fertilizer pump, and when the number of times of fertilizer pump driving (stroke) is reached, A irrigation fertilizer control device that secures the dilution rate by stopping the driving of the fertilizer pump.
(3). (To ensure the irrigation amount (L / R) within the planned irrigation time (min), the actual irrigation flow rate (L / min) and the fertilizer pump actual driving speed (stroke / min) are monitored.)
Enter the irrigation amount (L / R) required for one irrigation to the irrigation controller, enter the irrigation area (R), enter the scheduled irrigation time (min), and enter the required flow rate (L / min) ( The calculation is performed according to Equation 6).
The rated required flow rate (L / min) is displayed on the operation panel screen. This calculated flow rate is the required flow rate (L / min) necessary to secure the irrigation amount (L) within the rated irrigation time (min). The actual flow rate (L / min) converted from the flowmeter signal (pulse) by computer calculation is displayed side by side. During normal operation, the actual flow rate (L / min) is larger than the required flow rate (L / min). Adjusting the pressure reducing valve (or manual valve), integrating the flow rate signal (L) and reaching the irrigation metering capacity (L) (Equation 3), switching the solenoid valve to irrigation of the next system, irrigation required All systems that issue a warning if the specified amount of irrigation cannot be secured within the time, prompt the worker to adjust the pressure reducing valve (or manual valve) or clean the filter, and forcibly switch to the next system When the irrigation is finished, the solenoid valve is closed and the irrigation pump is stopped.
Factors that reduce the adjusted flow rate are: Clogged filter 2. 2. Clogged drip tube 3. Drop of water source pressure Trouble with irrigation pump, trouble with the same power system.
Enter the lower limit alarm flow rate ratio (%).
If the accumulated amount of irrigation (L / min) does not reach the metering capacity (L) for several irrigation within the scheduled irrigation time (min) and the instantaneous flow rate (L / min) is the lower limit alarm irrigation flow rate (L / min) Min) (Equation 7), when the irrigation flow rate (L / min) is unstable, or when it falls momentarily, the alarm device (sound / indicator) is activated except for the alarm with a certain time constant. A irrigation fertilizer control device that is recognized by
Factors that increase the adjusted flow rate include an increase in water source pressure or leakage due to a drip tube breakage. In this case, the driving speed increases in proportion to the increase in the flow velocity and exceeds the rated driving speed capability of the fertilizer pump, so the index is displayed.
Enter the upper limit alarm flow rate ratio (%).
If the instantaneous flow rate (L / min) exceeds the upper limit alarm irrigation flow rate (L / min) (Equation 8), the perception of drip tube breakage will instantaneously exceed the irrigation flow rate (L / min). In the case of an alarm, the alarm is removed at a certain time constant, and the alarm device (sound / indicator) is activated.
Or it is an alarm device which prevents a false alarm by not issuing an alarm for several tens of seconds after the water supply by opening the solenoid valve. (Several tens of seconds after the water supply due to the opening of the solenoid valve, pipes such as soft drip tubes are shrunk or are in a void due to water leakage, causing a rapid increase in flow rate) Recognize. Irrigation fertilizer control device.

  This inventor completed the irrigation fertilizer which satisfy | fills the said objective, solved the subject which the prior art mentioned above has, and the technical means is as introduce | transducing next.

The irrigation fertilization is performed while securing the irrigation amount per area (L / R) and the fertilization amount (CC / R) and keeping the fertilizer dilution rate constant.
A irrigation fertilizer that divides a cultivation field into a plurality of systems and arranges drip tubes in each system field unit to perform irrigation fertilization cultivation, and a filter that removes foreign substances from raw water in a water supply pipe that communicates with a water intake source A signal transmission type flow meter for measuring the irrigation flow rate is connected, and a fertilizer mixing section with a fertilizer pump for mixing fertilizer is sequentially installed, and each of the above-mentioned system fields is connected to the downstream pipe section of the fertilizer mixing section. Branching the drip tube, installing a tube solenoid valve upstream of the drip tube in each system field, installing a irrigation fertilizer control device for operating each system field unit, etc. For each fertilizer pump, the fertilizer application amount (CC / R), the irrigation area (R), and the irrigation time limit (min) are input. The irrigation weighing capacity (L) is calculated by (Equation 1).
The following formulas are all explained per system.

When the irrigation starts, the irrigation amount is measured by integrating the irrigation amount with a signal transmission flow meter (pulse), and when the irrigation rain amount (L) for irrigation is reached, the irrigation amount is stopped by stopping the irrigation. Irrigation fertilizer control device.
For each fertilizer pump, the fertilizing amount (CC / R) is input, the cleaning amount (L) for each system is input, and the dilution rate is calculated by (Equation 2).

Enter the rated driving frequency (stroke / min), enter the fertilizer pump rated capacity (CC / min), enter the fertilizer pump calibration rate (%), fertilizer irrigation required for one fertilizer pump driving The weighing capacity (CC) is obtained by (Equation 3).

Measure the irrigation amount with a flow meter (pulse), and when the accumulated amount reaches the fertilizer irrigation metering capacity (CC), the fertilizer solution (CC) is driven once with the fertilizer pump. Since the amount (CC) is fixed, the ratio of the irrigation amount (L) and the injected fertilizer liquid (CC) is constant, the dilution rate is constant, and the input irrigation amount (L / R) is secured. While, the irrigation fertilizer control device that controls the dilution rate constant. Calculate the number of times of fertilizer pump driving (stroke) per irrigation by (Equation 4), count the number of times of fertilizer liquid ((CC) is driven by the fertilizer pump, and if the number of times of fertilizer pump driving (stroke) is reached The irrigation fertilizer application controller that secures the fertilizer application amount (CC / R) by stopping the driving of the fertilizer pump.

(Monitoring irrigation amount)
The required flow rate (flow velocity) (L / min) is calculated and calculated by (Equation 6).

The rated minimum flow rate (L / min) is displayed on the screen. This calculated flow rate is the rated minimum flow rate (flow velocity) (L / min) necessary for securing the irrigation amount (L) within the rated irrigation time (min). The actual flow rate (L / min) converted from the flowmeter signal (pulse) by computer calculation is displayed side by side, and the actual flow rate (L / min) is higher than the rated minimum flow rate (L / min) during normal operation. Adjust the pressure-reducing valve (or manual valve), integrate the flow rate signal (L), and when the irrigation metering capacity (L) is reached, switch to the irrigation of the next system by switching the solenoid valve, within the specified irrigation time If the irrigation amount of the system cannot be secured, an alarm is issued to prompt the worker to adjust the pressure reducing valve (or manual valve) or filter cleaning, and forcibly switch to the next system. If this is the case, the irrigation fertilizer control device can close the solenoid valve and stop the irrigation pump.

Factors that reduce the adjusted flow rate are: Clogged filter 2. 2. Clogged drip tube 3. Drop of water source pressure Trouble with irrigation pump, trouble with the same power system.
Enter the lower limit alarm flow rate ratio (%).
If the accumulated amount of irrigation (L / min) does not reach the metering volume for irrigation (L) within the rated irrigation time (min) and the instantaneous flow rate (L / min) is the lower limit alarm irrigation flow rate (L / Min) (Equation 7) When it falls below (except for the initial stage of irrigation where the perfusion rate (speed) (L / min) is unstable), the irrigation fertilizer application control device is recognized by operating the alarm device (acoustic / indicator) .

Factors that cause the adjusted flow rate to increase include an increase in water source pressure or leakage due to breakage of the drip tube. Enter the upper limit alarm flow rate ratio (%).

If the drip tube breakage is recognized by the alarm device (sound / display) when the instantaneous flow rate (speed) (L / min) exceeds the upper limit alarm irrigation flow rate (speed) (L / min) (Equation 8) Light) A irrigation fertilizer control device that is recognized by operating.

  The number of times the fertilizer pump is driven in the present invention means the required number of operating strokes of the electromagnetic piston when the fertilizer pump is an electromagnetic pump, for example, and the required operation of the gear when the geared pump is used. In the case of a diaphragm valve type pump, it refers to the required operating stroke length of the diaphragm valve.

The irrigation fertilizer of this invention exhibits the following outstanding effect by the said structure.
At present, the amount of irrigation is increased or decreased by setting the timer, but it was not sure if the water was actually flowing, but now the required flow (L / min) to be flown is calculated and the flow meter The actual measured flow rate (L / min) of both is displayed on the screen, and the driver can adjust the flow rate adjusting valve with reference to it, so that the correct value can be adjusted easily. A warning device is activated by a comparative alarm process using a computer to detect the irrigation shortage caused by the situation of raw water during irrigation, equipment trouble, and carelessness of the grower. It is easy to recognize by making a mobile phone notify, and to draw attention for repair. By the above, irrigation could be performed safely and reliably, the excessive irrigation of the cultivated product was suppressed, and damage, wilting and death were eliminated.

The amount of irrigation (L) is set per area (R), so it is easier to understand than the setting of the timer (minutes), and irrigation caused by the situation of raw water during irrigation, equipment troubles, and carelessness of growers The amount of change could be prevented, and the quality of the cultivated product was improved because irrigation was performed accurately.

In the case of hydroponics cultivation, not only ensure the irrigation amount per area (L / R) and fertilization amount (CC / R), but also calculate the dilution rate by (Equation 2) and control with the dilution rate, The dilution rate was displayed on the screen. Since the soil to be used is expected to have a high buffering capacity for fertilizer, it was possible to manage the fertilizer management with the amount of fertilizer applied (CC / R). Since the dilution rate is controlled to be constant, the isolated root cultivation in which the cultivation root area is restricted and the cultivation control is performed can be managed so that the fertilizer concentration of the cultivation root becomes an appropriate value. Due to the dilution rate control, it was possible to prevent the fertilizer solution of high concentration from being applied to the root area of the cultivation when the amount of water was extremely reduced due to filter blockage, irrigation pump malfunction, etc.
In the case of hydroponics using a solid medium with a low buffer capacity using a non-closed high gantry, not only the amount of irrigation per area (L / R) and fertilizer dilution rate could be secured, but also the amount of fertilizer applied (CC Since irrigated fertilization is performed at a constant (R), the cultivation area does not change, so the fertilization amount (CC) can be managed for each line. By controlling the amount of drainage (CC), it was possible to suppress excessive irrigation and soil environmental pollutants due to drainage.

The best mode for carrying out the invention will be specifically introduced.
FIG. 1 shows an example of a irrigation fertilizer. The irrigation fertilizer of this example divides the cultivation field 10 into a plurality of systems, and performs the irrigation and fertilization cultivation by arranging the drip tubes 9a to 9i for each system field 10a to 10i.

1. Equipment configuration and function The irrigation fertilizer is a water intake source that has a constant water pressure required for irrigation, using an irrigation pump 2 that pumps raw water from a well or reservoir 1 where raw water is stored, and pumps the raw water. 3 includes a filter 5 for removing foreign matter from the raw water directly fed by the water intake source solenoid valve 4 without using an irrigation pump, and a transmission flow meter 15 for measuring the irrigation flow rate (flow velocity) (L / min). The solution is fed to a plurality of drip tubes 9a to 9i installed in the cultivation field 10 through the fertilizer mixing part 6 for mixing the fertilizer into the raw water and the plurality of tube solenoid valves 7a to 7i, and is supplied to the cultivation field 10 for fruit and vegetables. Supply water or water and fertilizer. Further, the cultivation fields 10a to 10i are provided with moisture meters 8a to 8i and a irrigation fertilization control device 13 for operating them.

  When the water intake source has a certain water pressure required for irrigation, and when using a facility installed in the field from a field irrigation dam, the electromagnetic valve 4 for the water intake source is first opened and then the water supply for irrigation is used. The electromagnetic valves 7a to 7i are opened and closed in accordance with the control of the irrigation fertilization control device 13, and the water intake source electromagnetic valve 4 is closed at the end of the irrigation fertilization.

  The fertilizer pump 12 is composed of one 12a, two 12b, or three 12c electromagnetic pumps, pulse pumps, and the like. The fertilizer pump 12 absorbs liquid fertilizer with a certain concentration from the fertilizer tank 11 under the control of the irrigation fertilizer application control device 13. In the case of 1 unit, one type (1 liquid 11a) in which fertilizer containing the total nutrients necessary for crops is dissolved at a certain concentration is used. In the case of 2 units, a plurality of components that cause precipitation by mixing fertilizers are used. Two types (two liquids 11b) or three types (three liquids 11c) in which the fertilizers contained are dissolved separately at a certain concentration are used. The three pumps are independently connected to the irrigation fertilization control device 13, and the irrigation fertilization control device 13 controls the operation or stop of the fertilizer pumps 12a, 12b, 12c.

The flow rate (flow velocity) (L / R) of the irrigation is measured with the transmission flow meter 15, and the raw water is poured to the set irrigation amount (L), and fertilizer with a constant dilution rate is injected into the raw water. If irrigation does not end within the scheduled irrigation time, switch to the next system.

In order to send irrigation with certainty, information on each stage of the processing performed by the irrigation fertilization control panel 13a, dilution rate, minimum flow rate, calculation stroke, actual flow rate, actual stroke, etc. are displayed on the operation panel 13b, and the actual flow rate is the lower limit When the alarm irrigation flow rate (Equation 6) and the upper limit alarm irrigation flow rate (Equation 7) are exceeded, the acoustic lighting alarm 16 is lit, or the night alarm is notified to the mobile phone by the remote alarm device 17 Make them aware of them. When the irrigation pump 2 is used, the irrigation pump 2, the electromagnetic valve 7, the fertilizer pump 12, the moisture meter 8, and the irrigation pump activation device 14 are electrically connected to the irrigation fertilization control panel 13. This irrigation fertilization control panel controls the solenoid valve and the fertilizer pump, controls the irrigation pump activation device 14, and drives the irrigation pump. When the irrigation pump 2 is not used, the irrigation fertilizer application control device 13 controls the electromagnetic valve 4 and the fertilizer pumps 12a and 12b. When irrigation is performed under the control of the irrigation fertilizer application control device 13, the irrigation pump is driven when the irrigation pump is used, and water is supplied from the well or the reservoir. When not in use, the irrigation pump is not operated and the irrigation pump is not operated. Direct water supply.

The moisture meters 8a to 8i measure the moisture permeated and infiltrated into the culture medium of the cultivation field 10, and operate the irrigation fertilizer application control device 13 based on the obtained data. For example, a moisture meter 8 that electrically outputs a change in medium moisture when moisture acts on the porous cup and the degree of vacuum is lowered is inserted into the soil. The moisture meters 8a to 8i are linked to the respective tube solenoid valves 7a to 7i. Multiple irrigation systems are controlled by multiple moisture meters. When the moisture state of each system is performed by the same moisture management, the same moisture management can be performed for all the systems by linking the output of one moisture meter 8a to a plurality of tube solenoid valves. Further, the irrigation fertilizer application control device 13 operates based on the data of the moisture meters 8a to 8i, and operates the irrigation pump starting device 14 to perform irrigation. The fertilizer in the fertilizer tanks 11a to 11c is sucked up by the fertilizer pumps 12a to 12c, and a predetermined amount of fertilizer is mixed into the raw water in the fertilizer mixing sections 6a to 6c.
Further, in this example, when the cultivation field 10 is divided into 8 systems 10a to 10i, grouped into 2 sections, and one moisture meter 8a to 8b is arranged for each section, moisture management is performed. Moisture management divided into two parts can be performed by linking all the solenoid valves in the section with a single moisture meter.
2. Detailed configuration and function of the irrigation fertilizer control device 13

The structure of the irrigation fertilization control apparatus 13 is shown in (FIG. 2).
The irrigation fertilization control apparatus (FIG. 2) in FIG. 1 is comprised from the control panel 13a and the operation board 13b. The control panel 13a includes a storage unit 300, a calculation unit 500, a control unit 400, a display / input operation screen 200, a driving instruction alarm screen, and a result display screen 700.

The storage unit 300 stores a time pattern table and stores a irrigation pattern logical structure. Setting values related to the start condition branch of the control unit 400 are input from the operation screen 200 and stored, and setting values necessary for calculation by the calculation unit 500 are input from the operation screen 200 and stored.

The control unit 400 includes a start condition branch process, a drive control process, and a comparison calculation process.
The start condition branching process selects the time pattern that matches the selected time pattern NO in the storage unit for each series under the time management, selects the selected irrigation fertilization pattern NO in the storage unit, and the appropriate irrigation fertilization pattern When the PF meter according to the logical structure of the irrigation and fertilization pattern is selected, it is judged whether or not the reservation is made. Record reservations in the order of acceptance in reception management.
The drive control process is registered in the operation order reservation acceptance management, and the operation of the equipment (irrigation system solenoid valves 7a-7i, irrigation pump 2, intake solenoid valve 4, fertilizer pumps 12a-12i) and fertilizer pumps based on the reservation record Stroke driving is performed and the reservation record that is no longer necessary is deleted.
Based on the reservation record, the operation of the equipment and the stroke drive of the fertilizer pump are done,
The device is stopped when the accumulated amount obtained by integrating the signal from the transmission flow rate signal reaches the irrigation measuring capacity (Equation 1) of the calculation unit 500.

When the accumulated amount obtained by integrating the signal from the transmission flow rate signal is equal to the fertilizer irrigation metering capacity (Equation 3) of the calculation unit 500, the stroke driving control of the fertilizer pump is performed once. Done. Thereafter, the number of times the fertilizer pump is driven is counted, and the stroke driving is stopped when the total count reaches the number of times the fertilizer pump is driven (Formula 4).

The comparison calculation process converts the flow meter signal (pulse) 15 into an actual flow velocity (L / min). When the actual flow rate (L / min) falls below the lower limit alarm irrigation flow rate (L / min) (Equation 6), or exceeds the upper limit alarm irrigation flow rate (L / min) (Equation 6), or When the integrated value of the irrigation time (minutes) exceeds the irrigation time limit value of the storage unit, the worker is recognized by notifying the cell phone by the patrol light alarm 16 or the remote alarm device 17 at night holidays.

The time management process performs the following start condition process once a minute. For a certain system, the time 13a is checked to see if there is a time that matches the time registered in the selected time pattern number. If there is no time, nothing is done. If present, the irrigation pattern logic structure from the selected irrigation pattern number, if the moisture meter operation is activated, irrigation is performed or not performed, irrigation fertilizer is performed or not performed, the moisture meter is not activated Even if irrigation is performed or not, information indicating whether or not irrigation fertilization is performed is recorded in the reservation table together with the system number.

The calculation unit 500 calculates and calculates the irrigation metering capacity (L) by (Equation 1) based on the irrigation amount (L / R), the irrigation area (R), and the irrigation time limit (min) required for one irrigation. .
(The following formulas are all explained per system.)
When the irrigation starts, the irrigation amount is measured by integrating the irrigation amount with a signal transmission type flow meter (pulse), and when the irrigation rain for the irrigation meter (L) of (Equation 1) is reached, the irrigation is stopped (L / R) Ensure irrigation fertilizer control device.

For each fertilizer pump, input the fertilizer application amount (CC / R), input the washing amount (L) for each system, and calculate and calculate the dilution rate by (Equation 2).

Enter the rated driving frequency (stroke / min), enter the pump rated capacity (CC / min), enter the fertilizer pump calibration rate (%), fertilizer irrigation metering required for one driving of the fertilizer pump The soot capacity (CC) is obtained by (Equation 3).

Measure the irrigation amount with a flow meter (pulse), and when the accumulated amount reaches the fertilizer irrigation metering capacity (CC), the fertilizer solution (CC) is driven once with the fertilizer pump. Since the amount (CC) is determined, the ratio between the irrigation amount (L) and the applied fertilizer solution (CC) is constant. The dilution rate is kept constant while ensuring the input irrigation amount (L / R). The irrigation fertilizer control device to control.
Calculate the number of times the fertilizer pump is driven (stroke) per irrigation using Equation 4, count the number of times the fertilizer liquid (CC) is driven with the fertilizer pump, and reach the number of times the fertilizer pump is driven (stroke) (Equation 4) Then, the irrigation fertilizer application control device which secures the fertilizer application amount (CC / Earl) by stopping the driving of the fertilizer pump.

The driving instruction alarm screen
Monitor irrigation volume.
Calculate and calculate the required flow rate (velocity) (L / min) by (Equation 6)

The required flow rate (L / min) is displayed on the screen. This calculated flow rate is a necessary flow rate (flow velocity) (L / min) necessary for securing the irrigation amount (L) within the irrigation time (min). The actual flow rate (speed) (L / min) converted from the flowmeter signal (pulse) by computer calculation is displayed side by side. In normal operation, the actual flow rate (speed) (L / min) is larger than the required flow rate (L / min). Adjust the pressure reducing valve (or manual valve) so that the flow rate signal is integrated (L), and when the irrigation metering capacity (L) is reached, switch to the irrigation of the next system by switching the solenoid valve. If a predetermined amount of irrigation cannot be secured, an alarm is issued, or on a night holiday, the remote alarm device 17 notifies the mobile phone by adjusting the pressure reducing valve (or manual valve) or Encourage workers to clean the filter, etc. and forcibly switch to the next system. When all systems have been irrigated, the solenoid valve is closed and the irrigation pump is stopped. Irrigation fertilizer control device.

Factors that reduce the adjusted flow rate are: Clogged filter 2. 2. Clogged drip tube. 3. Drop of water source pressure 4. Irrigation pump trouble, This is a problem with the power system.
Enter the lower limit alarm flow rate ratio (%). When the accumulated amount of irrigation (L / min) does not reach the metering volume for irrigation (L) within the irrigation time (min) and the instantaneous flow rate (speed) (L / min) is the lower limit alarm irrigation flow rate (speed ) (L / min) (Equation 7) below (except for the initial stage of irrigation where the perfusion rate (speed) (L / R) is unstable) Irrigation to recognize by operating the alarm device (sound / indicator) Fertilization control device.

Factors that increase the adjusted flow rate are as follows: 1. Increase in water source pressure Leakage due to breakage of drip tube.
Enter the upper limit alarm flow rate ratio (%).
If the drip tube breakage is recognized by the alarm device (sound / display) when the instantaneous flow rate (speed) (L / min) exceeds the upper limit alarm irrigation flow rate (speed) (L / min) (Equation 8) Light) A irrigation fertilizer control device that is recognized by operating.

3. Application example of irrigation fertilizer of this example

The irrigation fertilizer of this embodiment is applied to a fruit and vegetable cultivation field and a flower and vegetable cultivation field, and the results will be described taking cultivation of peppers, tomatoes and flower aristomeria there as an example. In the developed method, the same solenoid valve can be used for irrigation and fertilization, and a certain amount of irrigation and a constant amount of fertilization can be performed with a constant dilution rate.

In the present invention, the irrigation time (L / R) per reference area and the irrigation area (R) per system are the input values of the driver, not the irrigation time (minutes) by a timer that is conventionally used. In the control, the irrigation amount per unit area (L / R) is multiplied by the irrigation area (R) per system to obtain the irrigation amount (L). Moreover, since the dilution rate of each system is displayed on the operation screen, when the dilution rate is different from the required dilution rate, the irrigation amount (L / R) and the fertilization amount (cc / R) are adjusted.

For irrigation, blockage of the irrigation piping system, especially dams and water sources such as irrigated field irrigation lines are used as raw water, and the frequency of clogging of the filter is high, and the pressure loss of the piping increases and the irrigation flow rate (L / min) increases. In this case, in the case of the conventional method in which the irrigation time is constant, the planned irrigation amount cannot be ensured, which may cause wiping of the cultivated crop or death. Especially in the case of the irrigation fertilization system that aims to improve the quality and yield of crops by finely controlling the moisture of the cultivated soil using a irrigation tube called a teardrop tube, the filter mesh is used to irrigate from the slit of the tube. Since a particularly large amount of 120 to 200 mesh is used, clogging is likely to be impeded and the spread of the irrigation fertilizer method is hindered. This irrigation fertilizer will stop the irrigation pump when the integrated value of the electronic flow meter reaches the planned rain rate (L) for irrigation within the range that does not exceed the irrigation time limit (minutes). The irrigation can be stopped by closing the solenoid valve.

When the irrigation time limit value is exceeded during irrigation, the system is forcibly switched to the next reserved system at that time to ensure irrigation of other systems, and the driver is given sound, light by the patrol light 16, etc., or at night On holidays, irrigation can be ensured by taking measures such as filter cleaning, which is made known to the worker by notifying the mobile phone by the remote alarm device 17.

The irrigation system, the actual flow rate, and the minimum flow rate (flow rate) (5) (L / min) are displayed on the operation instruction alarm screen 13b. Adjust with the pressure reducing valve. In this way, the planned irrigation amount is reached somewhat earlier than the irrigation time limit, irrigation is completed, and it is possible to switch to the next system on the reservation table.

For fertilization, the conventional method of making the irrigation time and dilution rate constant changes the flow rate (L / min) when the filter is clogged, so even if the dilution rate can be made constant, the amount of irrigation However, the fertilizer amount is not stable.

  By this method, tomatoes cultivated in summer / autumn can maintain the vigor by applying the necessary fertilizer with a small amount of irrigation during the rainy season, and improve the quality by applying the necessary fertilizer with a small amount of irrigation in early autumn Is possible.

[Watering amount and method]
The irrigation amount per time is set as the irrigation amount (L) per cultivation area (R) based on the cultivation time and the growth amount of the crop. For irrigation, the irrigation operation is repeated based on the set irrigation amount, the irrigation time pattern and irrigation fertilization pattern of the selected index code, and the output of the moisture meter.

[Washing amount]
In order to prevent the drip tube from being contaminated by the deposition of fertilizer, an arbitrary washing amount (L) is input within the range of one irrigation time. Thereby, clogging due to deposition of fertilizer or the like in the drip tube can be prevented, and the watering ability can be maintained during the use period of the drip tube and the number of years of use can be extended. Although the setting of the amount of washing is appropriately changed according to the length of the drip tube of each system, it is not necessary to change the setting of the fertilizer described later by this change.

[Input fertilizer amount]
The input of the fertilizer amount is the amount of fertilizer per reference area (R) that is fertilized in one irrigation, and the fertilizer amount is changed according to the cultivation method and cultivation period. The amount of fertilizer is changed even when the nutrient state, soil strength, and cultivation method of the soil in each field are different.

[Method and display of irrigation fertilization to input fertilization frequency, additional fertilization order, N value]
In the time table of the selected irrigation time pattern, an arbitrary numerical value N is input to calculate the irrigation fertilization time. When N is entered, the time of irrigation or irrigation fertilization at the initial and repeat counts and any set time can be set, and the operation with the optimal irrigation fertilization pattern can be performed by setting the irrigation time pattern and irrigation fertilization pattern. it can. Moreover, the implementation method of irrigation or irrigation fertilization at each time is set on the interpersonal screen.

[Calculation method of fertilizer application]
When the fertilization amount (CC / R) is set, a value is calculated by multiplying the fertilization amount (CC / R) by the irrigation area (R) when the fertilization amount (CC / R) is set. Alternatively, when setting the dilution rate, the amount of irrigation (L) is controlled to be constant, and the dilution rate is also controlled to be constant, so the fertilization amount (CC) is constant. Alternatively, the value is calculated by multiplying the number of strokes of the fertilizer pump (Equation 4) (the number of fertilizers driven) by the amount of driving per stroke (CC) in one irrigation fertilization.

[History application and irrigation history preservation]
The irrigation and fertilization date and volume history can be stored in a computer for up to two weeks, so it can be used for proof of fertilizer application, etc. it can. This proof of fertilizer application is effective to prove the aforementioned reduced chemical fertilizer cultivation and reduced fertilizer cultivation.

[Method of irrigation and fertilization]
The method of irrigation and fertilization sets the area for each system, selection of irrigation time pattern, selection of irrigation fertilization pattern, washing amount, irrigation amount and fertilization amount. In the set irrigation time pattern, when the pattern of irrigation time pattern with one repetition of fertilization and then irrigation with the moisture meter is selected, each time the timer reaches the first time, Irrigation and fertilization are performed once for the area of each system, and then watering is performed by the output of the moisture meter. If fertilization is repeated twice, irrigation and fertilization are forcibly performed for the first two times of the time of the irrigation time pattern, and then the operation is the same as described above. When N times are input, irrigation or fertilization is repeated at the Nth or every Nth time of the irrigation time pattern. Thereby, appropriate fertilization and water management adapted to the growth amount and cultivation time of the crop can be performed.
<Specific example 1>

Set the irrigation amount (L / R) and irrigation time (min) on the screen and display the calculated lower limit flow velocity (L / min), and display only the measured flow velocity of the system that is irrigating at that time Therefore, it is easy to adjust with a manual valve, a pressure reducing valve, etc. so that the flow rate exceeds the lower limit flow rate.If the irrigation required per operation reaches the metering capacity for irrigation, the irrigation pump and solenoid valve Because it stopped, it was possible to irrigate accurately.
<Specific example 2>

As shown in Fig.3, if the actual flow rate is usually slightly higher than the minimum flow rate, the filter is clogged due to the contamination of the raw water and the flow rate drops, and if the irrigation does not end within the irrigation time, When the teardrop tube etc. is damaged, the irrigation flow rate (instantaneous value) will exceed the upper limit alarm setting. If the water pressure drops due to an alarm, power failure, or equipment trouble, the flow rate (instantaneous value) will exceed the lower limit alarm setting, so an alarm will be generated and an alarm such as light, sound, etc. will be issued to let the driver recognize and take action I was able to do reliable irrigation.
<Specific example 3>

Set the fertilization rate (CC / R) on the screen and display the calculated dilution rate and calculation stroke, or set the dilution rate on the screen and set the calculated fertilization rate (CC / R) ), The calculated stroke of each system is displayed, and the actual stroke (frequency of fertilizer injection) is displayed only for the system that is irrigating at that time, and the amount of fertilizer applied for the driver to set the dilution rate to the desired value (CC / R) and irrigation amount (L / R) are adjusted. Since the actual stroke controls the irrigation control device so as to achieve the displayed dilution rate, the fertilizer application amount (CC / R) and the dilution rate can be ensured accurately.
<Comparative Example 1>

It is explanatory drawing of the whole structure of a irrigation fertilizer. It is explanatory drawing which shows the system configuration | structure of the irrigation fertilization control apparatus which controls irrigation and fertilization in the irrigation fertilizer of FIG. It is a comparison figure of the system with or without an electronic flow meter.

DESCRIPTION OF SYMBOLS 1 Well or water tank 2 Irrigation pump 3 Water intake source 4 which has water pressure Solenoid valve for water intake 5 Filter 6 Fertilizer mixing part 7a-7i System electromagnetic valve 8a-8i System moisture meter 9a-9i System drip tube 10 Cultivation field 11a-11c Fertilizer tanks 12a to 12c Fertilizer pump 13 Irrigation fertilizer application device 14 Irrigation pump activation device 15 Electronic flow meter 16 Illumination sound alarm

Claims (3)

The irrigation fertilization is performed while securing the irrigation amount (L) and fertilization amount (CC / R) per area and keeping the fertilizer dilution rate constant.
Alternatively, irrigation fertilization is performed while ensuring the irrigation amount per area (L) and the fertilizer dilution rate, and keeping the fertilization amount (CC / R) constant. A cultivation method that uses a medium with strong buffering capacity and expects the fruits and vegetables to absorb the entire amount of fertilizer that has been fertilized, and divides the cultivation field into multiple lines, each of which has a small amount of irrigation. (Drip tube) is a irrigation fertilizer that performs irrigation fertilization cultivation, and connects a water pipe connected to the water intake source with a filter that removes foreign substances from the raw water and a signal transmission flow meter that measures the irrigation flow rate. In addition, a fertilizer mixing part with a fertilizer pump that mixes fertilizer is sequentially installed, and an infusion tube of each system field is branched and connected to the downstream pipe part of the fertilizer mixing part. A tube solenoid valve is installed upstream of the drip tube, and a irrigation fertilizer control device is installed to operate each system field unit. The water control device inputs the irrigation amount (L / R) required for one irrigation. Irrigation area ) Inputs, and inputs irrigation scheduled time (min), calculates calculated irrigation metering chambers capacitance for inputting fertilization (CC / ares) or dilution rate (L) by (Equation 1).
(The following formulas are all explained per system.)
When the irrigation starts, the irrigation amount is measured by integrating the irrigation amount with a signal transmission type flow meter (pulse), and when the irrigation rain for the irrigation meter (L) of (Equation 1) is reached, the irrigation is stopped (L / R) Ensure irrigation fertilizer control device. For each fertilizer pump, the fertilizing amount (CC / R) is input, the cleaning amount (L) for each system is input, and the dilution rate is calculated by (Equation 2). The calculated dilution rate is displayed on the screen for each system, and the amount of irrigation or fertilization is adjusted to ensure the necessary dilution rate.
Enter the rated driving frequency (stroke / min), enter the pump rated capacity (CC / min), enter the fertilizer pump calibration rate (%), fertilizer irrigation metering required for one driving of the fertilizer pump The soot capacity (CC) is obtained by (Equation 3).
The irrigation amount is measured with a flow meter (pulse), and when the accumulated amount reaches the irrigation metering capacity (CC) for fertilizer, the fertilizer solution (CC) is driven once with the fertilizer pump. (CC) is fixed, so the ratio of irrigation amount (L) and driven-in fertilizer solution (CC) is constant, while maintaining the input irrigation amount (L / R), the dilution rate is controlled to be constant Irrigation fertilizer control device.
Calculate the number of times of fertilizer pump driving (stroke) per irrigation by (Equation 4), count the number of times the fertilizer liquid (CC) is driven by the fertilizer pump, and when the number of times of fertilizer pump driving (stroke) is reached, A irrigation fertilizer control device that secures the fertilizer application amount (CC / R) by stopping the driving of the fertilizer pump.
The irrigation fertilization is performed while ensuring the irrigation amount per area (L / R) and the fertilizer dilution rate and keeping the fertilization amount (CC / R) constant.
It is a cultivation method that uses a solid medium of hydroponics and expects that nutrients with a stable composition and concentration will be supplied to the root area of fruits and vegetables using a medium with low buffering capacity and absorbed. , A irrigation fertilizer that divides the cultivation field into multiple systems, and arranges a tube with a large amount of irrigation (irrigation tube) in each system field unit to perform irrigation fertilization cultivation,
A water pipe that communicates with the water intake source is connected to a filter that removes foreign substances from the raw water and a signal transmission flow meter that measures the irrigation flow rate, and a fertilizer mixing section with a fertilizer pump that mixes the fertilizer is sequentially installed. The drip tube of each system field is branched and connected to the downstream pipe section of the fertilizer mixing section, and the tube solenoid valve is installed upstream of the irrigation tube of each system field, and each system field unit is operated. The irrigation fertilizer control device is installed, and the irrigation control device inputs the irrigation amount (L / R) required for one irrigation, inputs the irrigation area (R), and inputs the scheduled irrigation time (minutes). The irrigation weighing capacity (L) is calculated by (Equation 1).
(The following formulas are all explained per system.)
When the irrigation starts, the irrigation amount is measured by integrating the irrigation amount with a signal transmission type flow meter (pulse), and when the irrigation rain for the irrigation meter (L) of (Equation 1) is reached, the irrigation is stopped (L / R) Ensure irrigation fertilizer control device. For each fertilizer pump, input the dilution rate, input the cleaning amount (L) for each system, and calculate and calculate the fertilizer application amount (CC / R) by (Equation 5). The calculated fertilizing amount (CC / R) is displayed on the screen for each system, and the irrigation amount or dilution rate is adjusted so that the required fertilizing amount (CC / R) can be secured.
Enter the rated driving frequency (stroke / min), enter the pump rated capacity (CC / min), enter the fertilizer pump calibration rate (%), fertilizer irrigation metering required for one driving of the fertilizer pump The soot capacity (CC) is obtained by (Equation 3).
Measure the irrigation amount with a flow meter (pulse), and when the accumulated amount reaches the fertilizer irrigation metering capacity (CC), the fertilizer solution (CC) is driven once with the fertilizer pump. Since the amount (CC) is determined, the ratio between the irrigation amount (L) and the applied fertilizer solution (CC) is constant. The dilution rate is kept constant while ensuring the input irrigation amount (L / R). The irrigation fertilizer control device to control.
Calculate the number of times of fertilizer pump driving (stroke) per irrigation by (Equation 4), count the number of times of fertilizer liquid (CC) is driven by the fertilizer pump, and if the number of times of fertilizer pump driving (stroke) is reached, A irrigation fertilizer control device that secures the dilution rate by stopping the driving of the fertilizer pump.
(To ensure the irrigation amount (L / R) within the planned irrigation time (min), the actual irrigation flow rate (L / min) and the fertilizer pump actual driving speed (stroke / min) are monitored.)
Enter the irrigation amount (L / R) required for one irrigation to the irrigation controller, enter the irrigation area (R), enter the scheduled irrigation time (min), and enter the required flow rate (L / min) ( The calculation is performed according to Equation 6).
The rated required flow rate (L / min) is displayed on the operation panel screen. This calculated flow rate is a necessary flow rate (L / min) necessary for securing the irrigation amount (L) within the rated irrigation time (min). The actual flow rate (L / min) converted from the flowmeter signal (pulse) by computer calculation is displayed side by side. During normal operation, the actual flow rate (L / min) is reduced to be larger than the required flow rate (L / min). Adjust the valve (or manual valve), integrate the flow rate signal (L), and when the irrigation metering capacity (L) (Equation 3) is reached, switch to the irrigation of the next system by switching the solenoid valve, within the required irrigation time If the specified amount of irrigation cannot be ensured, a warning is issued, the adjustment of the pressure reducing valve (or manual valve) or filter cleaning, etc. is urged to the cultivation worker, and the system is forcibly switched to the next line. When the irrigation is over, the irrigation fertilizer control device that can close the solenoid valve and stop the irrigation pump, the above can be done for each system.
Factors that reduce the adjusted flow rate are: Clogged filter 2. 2. Clogged drip tube 3. Drop of water source pressure 4. Irrigation pump trouble, power supply system trouble, There is a malfunction of the solenoid valve.
Enter the lower limit alarm flow rate ratio (%).
If the accumulated amount of irrigation (L / min) does not reach the metering volume (L) for irrigation within the estimated irrigation time (min) and the instantaneous flow rate (L / min) is the lower limit alarm irrigation flow rate (L / min) ) If the value falls below (Equation 7), the irrigation flow rate (L / min) is unstable at the beginning of irrigation, or if it falls momentarily, the alarm is turned off with a certain time constant and the alarm device (sound / indicator) is activated. A irrigation fertilizer control device that can be recognized by things.
Factors that increase the adjusted flow rate include an increase in water source pressure or leakage due to a drip tube breakage. In this case, the driving speed increases in proportion to the increase in the flow velocity and exceeds the rated driving speed capability of the fertilizer pump, so the index is displayed.
Enter the upper limit alarm flow rate ratio (%).
Recognizing the drip tube breakage is the upper limit alarm irrigation flow rate (L / min) in which the instantaneous flow rate (L / min) is input.
When (Equation 8) exceeds the irrigation flow rate (L / min) momentarily, the alarm device (sound / indicator lamp) is activated with the exception of a false alarm at a certain time constant. Or it is an alarm device which prevents a false alarm by not issuing an alarm for several tens of seconds after the water supply by opening the solenoid valve. (Several tens of seconds after the water supply due to the opening of the solenoid valve, pipes such as soft drip tubes are shrunk or are in a void due to water leakage, causing a rapid increase in flow rate) Recognize. Irrigation fertilizer control device.