JPH11158856A - Device and method for adjusting water level of paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately set the water level of a paddy field by computing a water level of paddy field on the basis of the paddy field information such as a water supply starting time, paddy field area and water supplied flow per each day and temperature information of the paddy field water temperature, and setting the water supply time on the basis of the computed value. SOLUTION: A microcomputer 15 of a water supply adjusting control device is formed of a CPU 21 as a computing device and a data base 22 as a memory device. Real measurement values of intake temperature and paddy field water temperature as digital information are inputted to the CPU 21, and a forecast value of solar radiation of that day or a following day is inputted to the CPU 21. On the other hand, use in a cold district or a warm district, water supplying ability of a water gate, paddy field area and other information are stored in the data base 22. The CPU 21 uses these information so as to compute 28 the water supply time based on the decision 26 of water supply starting time and the computing 27 of water level, and the CPU 21 computes the control value for output 29. As a result, in a cold district, a water gate is full opened at night, and in a warm district, a water gate is full opened in the daytime.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a paddy water level adjusting device.

[0002]

2. Description of the Related Art In general, the following management method is employed as a method of controlling water supply in a paddy field to obtain a water temperature suitable for rice cultivation.

[0003] Management of water supply start time Example 1 This is adopted in a cold region such as Hokkaido, where water supply is started at the same or higher time as the water intake water temperature compared to the paddy water temperature. Example 2 Honshu, Shikoku, It is used in warm areas such as Kyushu, where water intake is started at a lower time than the paddy water temperature.Management of water supply stop time 管理 Management of water supply stop time Water supply stop time based on water supply amount, paddy field area and water level Management to decide

[0004]

According to the conventional general management method, the water level is adjusted by controlling the water supply start time and the water supply stop time. However, such a method is a control method based on human intuition. It was not clear whether the paddy water level was appropriate.

An object of the present invention is to provide a paddy water level adjusting device capable of adjusting a paddy water level to an appropriate level so that a rise in the temperature of the paddy water due to daytime sunlight is appropriate for rice cultivation.

[0006]

Means for Solving the Problems Daily paddy water levels have a significant effect on rice cultivation. The present invention is characterized in that the paddy water level is determined by the water temperature and the paddy water temperature, so that the temperature rise of the paddy water due to insolation on that day or the next day is controlled to be appropriate for rice cultivation. As described above, in cold regions, the water supply start time is set so that water supply starts at the same time or higher than the paddy water temperature, and in warm regions, the water intake temperature is set to the paddy water temperature. , The water supply start time is set so that water supply is started at a lower time, and the paddy water level determination processing is performed. The paddy water level may be determined in consideration of the sunshine status information of the day or the next day.

[0007] The temperature information of the water intake temperature and the paddy water temperature may be actually measured temperatures. In this case, the temperature difference between the intake water temperature and the paddy water temperature can be used for the calculation. Specifically, the present invention provides the following inventions.

[0008] In a paddy water level adjusting apparatus for adjusting the water level of a paddy field by supplying water to the paddy field by a water intake device, a water supply start time of the day for the paddy field, a paddy field database such as a paddy field area and a water supply flow rate, and temperature information of paddy water temperature , A paddy water level determination device that performs a paddy water level determination process, provides a water supply adjustment control device that sets a water supply time based on the calculated value, and performs water intake control of the water intake device. I do.

The temperature information is a temperature difference between a water intake temperature and a paddy water temperature.

The water supply adjustment control device includes a microcomputer for setting a water supply start time and a water supply stop time, and the microcomputer controls a 24-hour timer. The water supply adjustment control device has a receiving function and sets a water supply start time by a remote control signal.

According to the present invention, there is provided a paddy water level adjusting method for adjusting the water level of a paddy field by supplying water to the paddy field by using a water intake device. A paddy water level adjustment method is provided, wherein a paddy water level determination process is performed using temperature information of a temperature, a water supply time is set based on the calculated value, and water intake control of the water intake device is performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall configuration of the present invention. In the figure, the paddy water level adjustment device includes a water intake device 1, a water supply adjustment control device 2, and a solar cell 3 as a power supply. The water intake device 1 includes a water gate 4, a valve 5 for fully opening and closing the water gate 4, a valve stem 6 provided in a vertical direction on the water gate 4, and a rack 7 provided at a tip end thereof. The solid line in the figure indicates a fully closed state and the dotted line indicates a fully open state.

The water supply adjustment control device 2 comprises a pinion 9 meshing with the rack 7, and a motor 10, 1/18 for operating the pinion 9.
Reduction gear 11, ON and OF capable of a reduction ratio of 00
It has micro switches 12 and 13 for F control, a power switch 14 thereof, a microcomputer 15 used as a controller, a 24-hour timer unit 16, and a relay 17 for instructing forward / reverse rotation.

On the upper surface of the water supply adjustment controller 2, a solar cell 3
Is installed, and the energy obtained by the solar radiation is stored in the storage battery 18. The lower surface of the water supply adjusting device 1 has a support member 8.
Supported by the floodgate 4.

FIG. 2 shows control by the microcomputer 15.
The microcomputer 15 is composed of a CPU 21 as an arithmetic unit and a database 22 as a storage unit. The CPU 21 receives as input digital values of actual measured values of the water intake temperature 23 and the paddy water temperature 24.
5 is input. The database 22 records information on whether the area is used in a cold region or a warm region, the water supply capacity of a sluice gate, the area of a paddy field, and other information. The CPU 21 performs a water supply time determination process 28 based on the water supply start time determination 26 and the water level determination process 27 using these pieces of information, and a control value is calculated and output 29.

In a cold region, the water gate is fully opened by the microcomputer at night, and in a warm region, the water gate is fully opened in the daytime. For example, water is collected in a one-hectare paddy field for two to three hours,
cm and the water level is adjusted and controlled.

As described above, (1) water intake temperature is managed at the water supply start time, (2) paddy water level determination processing is performed using the paddy field database and the temperature information of the paddy water temperature, and (3) water supply start. The paddy water temperature is managed based on the paddy water level at the time and the water supply stop time.

The water level and the water supply time have the following relationship.

Water supply time = water supply stop time−water supply start time Water level = water quantity = water supply pipe diameter × water supply time / paddy area FIG. 3 shows the relationship between the water supply operation and the water stop operation in 24 hours. In the figure, the water supply operation is started at 2:00 AM, and the water stop operation is performed at 5:00 AM. That is, T
= Water supply for 3 hours. In the daytime, the water level is kept constant and the temperature rises due to solar radiation. by this,
In cold regions, the water temperature is raised and becomes appropriate.
The same applies to warm areas.

Although not shown, a configuration may be adopted in which the water supply adjustment control device 2 is provided with a wireless reception function to instruct the microcomputer 15 to set the water supply start time.

[0022]

According to the present invention, the temperature of the paddy water can be reliably adjusted, and an environment suitable for rice cultivation can be created.

Further, the work for this can be performed with extremely low labor.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a control block diagram.

FIG. 3 is a diagram showing water supply and water stop operation in one day.

[Explanation of symbols]

1 ... water intake device, 2 ... water supply adjustment control device, 3 ... solar cell,
4 ... water gate, 5 ... valve, 6 ... valve, 7 ... rack, 9 ... pinion, 15 ... microcomputer, 16 ... 24 hour timer unit,
17 ... relay, 18 ... storage battery.

Claims (5)

[Claims] 1. A paddy water level adjusting device for adjusting water level of a paddy field by supplying water to the paddy field by a water intake device, comprising:
Using a paddy field database such as water supply flow rate and temperature information of paddy water temperature, a paddy water level determination process is performed, and a water supply adjustment control device that sets a water supply time based on the calculated value is provided, and water intake control of the water intake device is provided. A paddy water level adjustment device characterized by performing: 2. The paddy water level adjusting device according to claim 1, wherein the temperature information is a temperature difference between an intake water temperature and a paddy water temperature. 3. The water supply adjustment controller according to claim 1, further comprising a microcomputer for setting a water supply start time and a water supply stop time, wherein the microcomputer controls a 24-hour timer. Paddy water level adjustment device. 4. The paddy water level adjustment device according to claim 1, wherein the water supply adjustment control device has a reception function and sets a water supply start time by a remote control signal. 5. A paddy water level adjusting method for adjusting water level in a paddy field by supplying water to the paddy field by using a water intake device, comprising:
A paddy field characterized by performing a paddy water level determination process using a paddy field database such as a water supply flow rate and temperature information of a paddy field water temperature, setting a water supply time based on the calculated value, and performing water intake control of the water intake apparatus. Water level adjustment method.