JPH02215320A - Diluted nutrient solution control with microcomputer - Google Patents

Abstract

PURPOSE:To feed the optimal diluted nutrient solutions to a plurality of different cultivation media by controlling with a micro computer a system wherein a diluted nutrient solution is prepared with a plurality of independent feeding or stopping means for raw solutions and raw water in a mixing tank and the prepared nutrient solution is fed in the cultivation media. CONSTITUTION:In the control of a cultivation system with a micro computer wherein a diluted nutrient solution is prepared with a plurality of independent feeding or stopping means (e.g. A-1, A-2 and E) for raw solutions and raw water in diluted nutrient solution-feeding or stopping means (mixing tank C) and the prepared diluted nutrient solutions are fed in cultivation media with feeding or stopping means, the control is carried out as follows. A diluted nutrient solution comprising arbitrary components in an arbitrary mixing ratio and amounts required for the above-mentioned media set on the basis of solar radiation amounts, temperatures, humidities, medium water contents, the past data, etc., is fed into the media on a water level or position (e.g. a position in a pocket P) disposed in the mixing tank C so that the level of the remaining diluted nutrient solution in the mixing tank C is always maintained at the above-mentioned water level or position (DF is a water level-detecting means in the mixing tank C).

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a diluted nutrient solution control method for creating support software necessary for a complex environmental control system using a microcomputer.

<Conventional technology> Currently, with the transition from soil cultivation to hydroponic cultivation to plant factories, a complex environmental control system using microcomputers has been established to control the environment by letting microcomputers do as much of the work that has been done by humans as possible. It's coming.

By the way, it is necessary to accumulate data over a certain period of time in order to develop the optimal cultivation method suitable for the plant using culture media, equipment, nutrient solutions, etc. To do this, diluted nutrient solutions with different components, mixing ratios, amounts, etc. are supplied to multiple independent culture media or to the same culture medium under the same conditions such as solar radiation, temperature, humidity, and carbon dioxide concentration, and then Data such as feeding time and feeding time to the culture medium, components of the diluted nutrient solution, mixing ratio, amount, etc. are stored and processed together with data such as moisture in the culture medium, amount of solar radiation, temperature, humidity, carbon dioxide concentration, etc., to determine the growth state. The work of comparative analysis is
It will inevitably become necessary.

Furthermore, if a single device can supply four-sample nutrient solutions with different components, mixing ratios, amounts, etc. to a plurality of independent culture media of different plants, it is possible to share facilities and equipment, which is economical.

Many publications have been published regarding diluted nutrient solution control using a mixing tank, such as Japanese Patent Publication No. 58-40455, Japanese Patent Application Publication No. 61-674.18, and Japanese Patent Application Publication No. 61-185135.

<Problems and Means to be Solved by the Invention> Conventionally, a diluted nutrient solution control device using a mixing tank has generally had a configuration as shown in FIG. 1, for example.

That is, A-1 and A-2 are stock solution storage water supply stop means, B-1
, B-2 is a means for stopping the measurement and supply of raw solution, C is a means for stopping the supply of diluted nutrient solution (mixing tank), D is a means for stopping the supply of diluted nutrient solution storage water, and E is a means for stopping the supply of raw water, each of which is electrically connected to the control box. It is connected to the. In addition, each of the means except the raw water supply stop means E includes water level detection means (circuits) DA-1, DA-2, DB-1, DB-
2DC and DD are provided and electrically connected to the control box.

The mechanism for creating diluted nutrient solution is to stop the supply of diluted nutrient solution (
When the liquid level in the mixing tank (C) reached a certain level, the preparation was started, and the preparation was finished after the appropriate amount of raw solution and raw water was supplied. In this case, the above configuration does not have the precision to measure and mix multiple raw solutions and raw water in the diluted nutrient solution preparation and supply stop means (mixing tank) C, which increases the time required for mixing and requires extra equipment. need,
In addition, the amount of diluted nutrient solution created is not arbitrary, and there is a drawback that diluted nutrient solutions with different components, mixing ratios, and amounts cannot be created continuously.

As described above, it is insufficient in terms of functionality or performance to make it possible to soften the optimum cultivation method using a complex environmental control system.

By the way, if the present invention is applied to the above example.

As shown in Fig. 2, the undiluted solution storage water supply stop means A-1, A
-2. Diluted nutrient solution preparation supply stop means (0 tank) C2 Raw water supply stop means E, each electrically connected to the microcomputer. In addition, the diluted nutrient solution preparation supply stop means (mixing tank) C includes a DF, and the stock solution storage water supply stop means A-1 and A-2 contain water level detection means (circuits) of DA-1 and 0A-2. ) are provided (also installed in the raw water supply stop means E if necessary) and electrically connected to the microcomputer. The accuracy of each means is set within a range of error that is practically acceptable for each function.

The mechanism of making diluted nutrient solution is as follows. In the case of claim 1, Fix and set the starting point for creating the diluted nutrient solution.

Based on the water level or position at that point, a diluted nutrient solution with arbitrary components and mixing ratio is prepared in the minimum amount for one time, and after supplying the medium, the system returns to the starting point. Therefore, diluted nutrient solutions with different components, mixing ratios, and amounts are prepared each time with a fixed starting point. In this case, for example, the starting point may be set at one location in the pocket P in the diluted nutrient solution preparation and supply stop means (mixing tank) C in Fig. 2 to increase the detection accuracy and measure a minute amount of the stock solution. is also possible.

In the case of claim 2, the starting point for creating the diluted nutrient solution is set to the water level of the residual diluted nutrient solution created last time (
After supplying the diluted nutrient solution with arbitrary components and mixing ratio to the culture medium, the remaining diluted nutrient solution created this time in the diluted nutrient solution creation and supply stop means (mixing tank) C will always be used for the next creation. Create any amount within the possible range. Therefore, every time
Diluted nutrient solutions with different components and mixing ratios are created without fixing the starting point within the range that can be created next time.

Therefore, it is possible to continuously and automatically create diluted nutrient solutions with different arbitrary components, mixing ratios, and amounts at the most necessary time without any waste. Further, data such as the time of supply to the culture medium, the supply time, the components of the diluted nutrient solution, the mixing ratio, and the amount can be stored and processed. As described above, the present invention is extremely versatile, economical, and convenient, and can be flexibly adapted to all cultivation methods.

Function> In Fig. 3, 1, for example, microcomputer M has an input/output circuit (I1
0 interface) 10, the water level detection circuit (means) DA of the stock solution storage water supply stop means A-i, A-2
-1, DA-2, Water level detection circuit (means) DF of the diluted nutrient solution creation and supply stop means (mixing tank) C, Other solar radiation detection circuit (means) DS, Temperature detection circuit (means) DT, Humidity detection Circuit (means) DH1 medium moisture detection circuit (means) D
W, a carbon dioxide concentration detection circuit (means) DG, etc. constitute a detection circuit, and drive circuits (supply stop means) MA-1, MA-2 for the stock solution storage water supply stop means A-1, A-2. Drive circuit (supply stop means) MC for diluted nutrient solution preparation supply stop means (mixing tank) C, drive circuit (supply stop means) ME for raw water supply stop means E, other window ventilation drive circuits (means) MW, boiler drive Circuit (means) MB, heater drive circuit (means) MH,
Curtain drive circuit (means) MK, watering drive circuit (means)
MS, means for stopping the supply of the diluted nutrient solution (mixing tank) C
The diluted nutrient solution stirring drive circuit (means) MM and the cleaning drive circuit (means) MG constitute a drive circuit, and are connected to each other.

The microcomputer may be a controllable pocket computer (hereinafter referred to as pocket computer) that has recently been commercially available, and the drive circuit (supply stop means) MA-1, MA-2, MC,
The ME etc. may be a pump or may be a solenoid valve if it is at a high level.The water level detection circuit (means) DF converts an analog quantity into a digital quantity or converts the diluted nutrient solution into a digital quantity, for example. Use a device that can be detected with an accuracy that does not cause any practical problems in preparation, measurement of residual diluted nutrient solution amount, measurement of culture medium supply amount, etc., and if necessary, use a breakwater plate or breakwater to prevent errors caused by waves when supplying undiluted solution raw water. Install the pipe.

The capacity of the diluted nutrient solution production and supply stop means (mixing tank) C is approximately 1.1 to 1.3 times the maximum amount required for one time supply of the diluted nutrient solution to a unit culture medium, and its shape is similar to that of the bottom. Make the height greater than the length of each side. The stock solution storage water supply stop means A
In -1 and A-2, the concentration of the stock solution is such that the diluted nutrient solution preparation functions with sufficient accuracy, and the volume is the amount required for the entire growth period of cultivated plants or for a certain period (for example, once per month). This is the amount necessary for the water level detection circuit (one time).
Means) DA-, 1 and DA-2 are for detecting the lower water level of the stock solution.

FIG. 4 shows a flowchart of the present invention. First, all the drive circuits (supply stop means) are set to the initial state, and the remaining diluted nutrient solution, stock solution, raw water, amount of solar radiation, temperature, humidity, moisture in the medium, carbon dioxide, etc. Check the gas concentration, past data, etc. if necessary, and determine the components of the diluted nutrient solution that should be created using logical means.
Setting the mixing ratio, amount, etc.Next, the liquid level of the first stock solution is set in the diluted nutrient solution preparation and supply stopping means (mixing tank) C, and the first stock solution is supplied up to that level. If the stock solution becomes low during the process, "Oo stock solution, lowest liquid level has been reached I I IJ" will be displayed and the program will continue.

Thereafter, the second stock solution, third stock solution, and raw water are successively supplied and stirred after being prepared. Next, the culture medium supply level and timing are set again based on the moisture data of the culture medium, and in this case, the moisture detection means DW is provided at several locations in one unit of culture medium,
The average value or the lowest value is taken, and if the diluted nutrient solution runs out during the process, the initial initial settings are executed to compensate for the shortage. Finally, the diluted nutrient solution supply data (
(supply time, supply time, supply amount, components, mixing ratio, etc.) are memorized. Then, the initial settings are returned and the process is repeated again.

<Example> FIG. 5 is an example for one unit of culture medium from sunrise to sunset. That is, in an environment where temperature, humidity, carbon dioxide concentration, etc. are kept constant within a certain range, when the solar radiation curve in the figure reaches the set level, the preparation of diluted nutrient solution is started and the moisture content of the medium is 80%. %, and then from 60% to 8
FIG. 2 is an explanatory diagram of control in which the supply is repeated within a range of 0% and then the supply is stopped after sunset to promote photosynthesis, translocation, and respiration of plants.

In such control, for example, the first medium is a diluted nutrient solution standard for A plant, the second medium is a diluted nutrient solution in a different amount for each plant, and the third medium is a diluted nutrient solution with a different mixing ratio for A plant. 4
The present invention is applied to a culture medium such as a diluted nutrient solution having different components, mixing ratios, and amounts for B plants, and some examples thereof are displayed on a microcomputer as shown in FIG. 6 and Table 1. In this case, the first
The NO in the table indicates the order of supply to the medium, the time indicates the supply start time, the medium indicates the culture medium number, and the components and mixing ratio are stock solutions A, BC, 1.
0 is the standard unit, and the amount (%) is shown with the rated capacity of the diluted nutrient solution preparation and supply stop means (mixing tank) C as 100%. In this case, Table 1 shows the method for supplying the medium , 1, No, 1-1, Not-2, No, 1-3
．． N.

1-4, Washing, No. 2-1, No. 2-2, N.

3-1. Washing, No. 4-1, a method of preparing and supplying a unit of culture medium.

2. No. 1-1 and No. 1-2 (1') total amount creation, No. 1-3 and No. 1-4 total amount creation, cleaning, N.

2-1, No. 2-2 and No. 3-1 total amount creation cleaning, N
As shown in o4-1, the diluted nutrient solution required for the next production is predicted from the past data and the medium moisture data that changes with the open side, and the diluted nutrient solution production and supply stop means (mixing tank) C
After creating the maximum amount allowed at once with the capacity and precision of .

A method of creating and supplying diluted nutrient solutions with the necessary ingredients, mixing ratios, and amounts for each culture medium.

3. Method of creating and supplying by setting the previous day's supply data.

4. Only those whose patterns are known in advance are prepared using the most efficient method, and those whose patterns are not known are prepared and supplied for each unit of culture medium.

There are various methods, such as, and you can also create and supply the information by manually inputting it from the microcomputer's keyboard during the process.

Furthermore, the present invention is not applicable only to an open system in which the medium is simply supplied to the culture medium, but the data on the used culture medium diluted nutrient solution is measured and inputted to a microcomputer, so that the used medium diluted nutrient solution is It is possible to create a diluted nutrient solution using a nutrient solution, and therefore it is also applicable to a circulation system.

<Effects of the Invention> From the above, it is possible to continuously and automatically supply diluted nutrient solutions with different components, mixing ratios, and amounts to a plurality of independent culture media or to the same culture medium at the most needed time without waste. Data such as the amount of sunlight, temperature, humidity, carbon dioxide concentration, moisture in the medium, etc., as well as the time and duration of supply to the medium, the components, mixing ratio, and amount of the diluted nutrient solution are stored and processed to determine the growth state. Through comparative analysis work, it is possible to develop software in a complex environmental control system. Therefore, it is possible to create unique support software that best suits the culture medium, equipment, plants, etc. at the site.

Further, the undiluted solution in the undiluted solution storage water supply stop means A-1, A-2 may be a diluted nutrient solution as long as the components and mixing ratio are known; , the raw water supply stop means E, etc. are compatible with the existing diluted nutrient solution control device and can be easily incorporated into the existing equipment.

In addition, this device alone can supply diluted nutrient solutions with different components, mixing ratios, amounts, etc. to a plurality of independent culture media of different plants, making it economical.

In this way, the present invention not only creates and supplies a diluted nutrient solution optimal for multiple different media, but also creates and supplies a single diluted nutrient solution for a single medium, as well as provides complex environmental control. This is an innovative method for creating the support software necessary for the system.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention. Fig. 1 is a block diagram of a conventional diluted nutrient solution device, Fig. 2 is a block diagram of a diluted nutrient solution device of the present invention, and Fig. 3 is a system circuit diagram of the same as above.
Figure 4 is an explanatory diagram of the same operation as above, Figure 5 is an explanatory diagram of diluted nutrient solution supply as above, Figure 6 is an explanatory diagram of diluted nutrient solution supply to multiple media as above, and Table 1 is an explanatory diagram for supplying diluted nutrient solution to multiple media as above. This is an explanation of diluted nutrient solution supply. A-1, A-2... Raw solution storage water supply stop means B-1, B-
2. Fist stock solution measurement supply stop means C... Diluted nutrient solution preparation supply stop means (mixing tank) Dφ stand diluted nutrient solution storage water supply stop means E- and raw water supply stop means Pφφ pocket DA-1,
DA-2, DB-1, DB-2, DCDD, DF・ΦWater level detection means (circuit) MI111 microcomputer Ilo・input/output circuit (engineering 10 interface DS・
・Solar radiation detection circuit (means) DT・Temple temperature detection circuit (means) DH・Medium humidity detection circuit (means) DW・・Moisture detection circuit (means) DG@φ carbon dioxide concentration detection circuit (means) MA-1, M.A.
-2, MC, ME fist drive circuit (supply stop means) W- MB ・ MH ・ MK ・ MM MG @ ・Window ventilation drive circuit (means) ・Boiler drive circuit (means) ・War heater drive circuit (means) ・Curtain Drive circuit (means) 11 Watering drive circuit (means) Fist-loaded nutrient solution stirring drive circuit (means) - Cleaning drive circuit (means) for diluted nutrient solution creation and supply stop means (mixing tank)

Claims (1)

[Scope of Claims] 1. A microcomputer (hereinafter referred to as a microcomputer) for preparing a diluted nutrient solution in a mixing tank using a plurality of independent stock solution and raw water supply stop means, and supplying the diluted nutrient solution to the culture medium by the supply stop means. In the control method, a diluted nutrient solution with arbitrary components, mixing ratios, and amounts necessary for the culture medium set according to solar radiation, temperature, humidity, moisture content of the culture medium, past data, etc. is provided in the mixing tank. By making the residual diluted nutrient solution in the mixing tank always at the water level or position after supplying it to the culture medium based on one water level or position, or to multiple independent culture media. The diluted nutrient solutions with different components, mixing ratios, and amounts can be automatically and continuously supplied to the same medium at the most necessary time without waste, and the time of supply to the medium, the supply time, and the components of the diluted nutrient solution A diluted nutrient solution control method that memorizes and processes data such as mixing ratios and amounts to create the support software necessary for a complex environmental control system. 2. In microcomputer control for producing diluted nutrient solution in a mixing tank using a plurality of independent stock solution and raw water supply stop means, and supplying the diluted nutrient solution to the culture medium by the supply stop means, solar radiation, temperature, A diluted nutrient solution with arbitrary components, mixing ratios, and amounts necessary for the medium set according to humidity, moisture of the medium, past data, etc., and a diluted nutrient solution of the previously prepared residual diluted nutrient solution in the mixing tank, Based on the amount data, after supplying the medium, the residual diluted nutrient solution of the current preparation in the mixing tank is always within the range that can be prepared next time, so that it can be applied to multiple independent culture media or The diluted nutrient solutions with different components, mixing ratios, and amounts can be automatically and continuously supplied to the same medium at the most necessary time without waste, and the time of supply to the medium, the supply time, and the components of the diluted nutrient solution A diluted nutrient solution control method that memorizes and processes data such as mixing ratios and amounts to create the support software necessary for a complex environmental control system. 3. A plurality of independent stock solution storage water supply stop means, a raw water supply stop means, and a supply of stock solution and raw water from the stock solution storage water supply stop means and the raw water supply stop means to create a diluted nutrient solution and add it to the culture medium. A diluted nutrient solution creation and supply stop means (mixing tank) for sending out and supplying, the stock solution storage water supply stop means, the raw water supply stop means, and the diluted nutrient solution creation and supply stop means (
Water level detection means (circuit) installed in each mixing tank)
, a microcomputer that electrically connects and controls the supply stop means (drive circuit), etc., and the diluted nutrient solution with different components, mixing ratios, and amounts in a plurality of independent culture media or in the same culture medium. It can be supplied continuously and without waste when it is most needed, and data such as the time of supply to the medium, the supply time, the components of the diluted nutrient solution, the mixing ratio, and the amount can be stored and processed to create a complex environment. A diluted nutrient solution control device that features the ability to create the support software necessary for the control system.