JPS633734A - Water control system in farmland - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a water management system in agricultural land that can automatically adjust the water level in agricultural land.

(Conventional technology) In general, the increase or decrease in yield in rice cultivation is greatly influenced by water management, and in recent years rice cultivation I! ! ! The turning point for profitable mulberry farming in the case of monoculture is 5 hectares, and for this reason, there are only a limited number of part-time farmers, and many farmers are involved in mixed farming or part-time farming.

Regarding water intake to maintain the appropriate water level in rice fields, even if the amount of water used is secured, it takes a long time to adjust the water intake, and depending on weather conditions and rice growth conditions, the water level may be shallow, deep, or replaced. water management is required, and such water management relies on long-standing intuition.

(Problem that the invention seeks to solve) However, for the majority of farmers, compound farmers and part-time farmers, they cannot spend a long time managing water, so they measure air temperature, water temperature, etc. and adapt it to weather conditions. Therefore, it is very troublesome to adjust the water level from time to time, and if this is neglected, the yield will be affected.

The present invention has been made based on the above-mentioned problems, and it is an object of the present invention to provide a water management system for farmland that can automatically adjust the water level according to weather conditions and rice growth conditions.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a water intake means between an irrigation canal and farmland, and measures the water level, temperature, rice growth state, etc. in the farmland by measuring means installed in the farmland. The water level in the farmland is automatically adjusted by detecting measurement data of the agricultural land, setting an appropriate water level based on the measurement data, and operating the water intake means.

(Example) Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 is an irrigation canal, 2 is a rice field, and 3 is a bank. Water intake 1 [I4] is attached to the water intake of ridge 3. This intake weir consists of an intake body 5 made of an appropriate material such as concrete, metal 9, synthetic resin, or wood, and a slat etc. that is slidably provided in a guide groove 6 diagonally provided on the opposing inner wall of this intake body 5. h) A flexible gate 7 and a winding drum 8 which is attached to the lower end of the water intake body 5 on the paddy field side and has a built-in motor for winding up the gate 7. A water leakage membrane 7A made of a flexible sheet such as vinyl is provided at both ends of the gate 7, and it sticks to the water intake body 5 and the gate 7 due to water pressure and a slight flow velocity, sealing the gap between the guide groove 6 and the gate 6. It is designed to shut off and prevent water leakage. Several piano wires 9 are inserted into the flexible gate 7 in a direction perpendicular to the winding shaft, and the resilient force of the piano wires 9 resists the force of the winding drum 8 and closes the gate 7. It's encouraging. Reference numeral 10 denotes an overhang protruding from both sides of the water intake body 5, which prevents crayfish and the like from entering along the gap between the water intake body 5 and the ridge 3.

Further, it is preferable that the winding drum 8 be a polygonal drum that matches the width of each slat of the gate 7.

In the paddy field 2 near the water intake weir 4, a water level gauge 12 is erected, in which a float 11 for detecting the water level is movably movable up and down, and the water level gauge 12 communicates with the paddy field 2. Further, along the water level gauge 12, an underground temperature sensor 13 for detecting the underground temperature, a water W4 degree sensor 14 for detecting the temperature in the water, and an air temperature sensor 15 for detecting the humidity in the air are installed at appropriate positions. It is being At the upper end of the water level gauge 12, the opening/closing of the gate 7 is set at 1 lilJ.
A control means 16 is housed in a waterproof housing 17. A solar cell 18 charged by solar heat and an antenna 19 are disposed on the upper surface of the housing 17, and the υ control means 16 is connected to the winding drum 8 by a cable 20.

FIG. 2 shows a block diagram of the control means 16, 21
13, 14 and 15 are measurement units that output water level, underground temperature, water temperature, air temperature, etc. 22 is a time mechanism which counts and outputs the day of the Western calendar and the 9 times of the day of the week, and also has a timer function. 23
1 is a power supply unit consisting of the solar cell 18, which has a power storage device so that it can supply power even at night, and supplies power so that each part operates normally.

Reference numeral 24 denotes a setting unit for setting setting data such as each scale water level of the paddy field 2 according to weather conditions and rice growth conditions. Received wireless data can also be entered. Reference numeral 25 denotes a storage section that stores setting data input to the setting section 24, measurement data of the measuring section 21, time data, and the like.

26 is a logic unit using a microcomputer, etc., which refers to the water level and temperature measurement data and time data from the measurement unit 21, compares the setting data, determines the optimal state of the water level, and calculates the increase or decrease in the water level. The result is sent to the control unit, which will be described later.

Reference numeral 27 denotes a control section, which has an A/D and D/A converter, and sends and receives signals based on potentials to and from each section using an electronic circuit. In other words, the water level.

Analog signals such as temperature are converted into digital signals and output to the logic section 26, and the time data of the time function 22 is converted to a digital signal and output to the logic section 26.
．． The data in the storage unit 24 is output to the storage unit 25, and the data in the storage unit 24 is
5, converts the data from the logic section 26 into analog, and outputs it to the operating section 28 to control the rotation of the winding drum 8, thereby supplying appropriate signals and current to each section.

Figure 3 shows the composition of the soil of the ridge 3, and the ridge 3 of the present invention is composed of a soil conditioner 29 mixed with a cement-based solidifying agent, quicklime, slaked lime, etc., mixed with stone powder 30@-31. There is. That is, if the soil 31 used for the ridge 3 does not require high strength, the addition rate of the soil conditioner 29 to ±31 can be made small; however, in general, when walking on the ridge 3 or placing heavy objects on it The addition rate is about 3% (based on dry weight) in order to withstand the strength of . However, if the addition rate is below this level, the amount of soil conditioner 29 will be too small and it will not be possible to uniformly spray it on the soil 31, resulting in ±3
It is difficult to mix it uniformly with 1, and there is a risk that the strength of the ridge 3 will vary, leading to water leakage. Therefore, the present invention provides soil conditioner 2.
9 mixed with stone powder 30 is sprinkled on the soil 31 to construct the embankment 3.

The present invention configured in this manner will be described in detail.

First, the operator inputs from the setting section 24 appropriate water levels for various rice fields 2 corresponding to weather conditions and rice growth conditions. For example, weather conditions mean that when the temperature is high, the water level must be raised, and the relationship between this temperature and water level is input as setting data, and growth conditions mean the setting of the water level after how many days have passed since rice was planted. The relationship between the date or time and the water level is input as setting data corresponding to the time mechanism 22.

A float 11 and an underground temperature sensor 13 that constitute the measuring section 21. Water temperature temperature sensor 14. The temperature and humidity sensors 15 each output measurement data to the control section 27.

The theory section 26 compares the measurement data with the setting data input from the setting section 24 via the control section 27 and stored in the storage section 25, and calculates the set water level based on the weather conditions and growth conditions at that time. Then, it is determined whether the actual water level has reached this set water level, and if the water level is low, the winding drum 8 is rotated via the operating part 28, and the gate 7 is operated to direct water from the winding waterway 1 into the rice field 2. Take water.

When the water level reaches the set water level, the winding drum 8 is rotated in the opposite direction, and the elastic force of the several piano wires 9 inserted into the gate 7 causes the gate 7 to rotate in the opposite direction in the closing direction. will close smoothly and water intake will be stopped. still,
In the embodiment, only the water intake weir 4 is provided, but a drainage weir can also be provided in the same way, and by operating the control means 16, the gate 7 can be automatically opened to drain water when the water level is higher than the water level.

In this way, an appropriate set water level corresponding to weather conditions and rice growth conditions is stored in advance, and the control means 16 automatically controls the opening/closing of the water intake gate 7 based on this set water level, thereby controlling the water intake in the paddy field 2. water level can be adjusted appropriately. For this reason, the complicated work of a worker patrolling the rice fields 2 and opening/closing the water intake weir, as in the past, is no longer necessary, and the farmer's labor can be reduced. In addition, water intake is controlled based on optimal data without relying on the intuition of operators over many years, so rice yields are increased.

Furthermore, the water management system of the present invention can be used not only for rice cultivation in paddy fields, but also as a water storage dam during heavy rain. Paddy fields are mainly cultivated downstream of rivers, but they are also cultivated in mountainous areas to a large extent, and the present invention is applied to areas where water can be stored upstream, such as paddy fields, where water storage for a short period of time will not affect agricultural crops or agricultural facilities. The device is installed, and in the event of heavy rain, it transmits emergency data via radio to forcibly open the gate 7, and water from the irrigation canal connected to the river is taken into these rice fields and stored. It is also possible to store rainwater in the rice field by controlling drainage to prevent water from flowing into the river. For example, by giving a water level of 10 cm to a paddy field of one town walk, 1 town walk ÷ 10000 m2 x 0.1
m=10001131000 m3 of water can be stored, and the water management system of the present invention can be used temporarily as a dam function during heavy rain at a much lower cost than building a dam.

Further, in addition to the soil improving material 29, stone powder 30 is mixed in the ±31 constituting the ridge 3 of the present invention. This stone powder 3
0, the addition rate of soil conditioner 29 is at least ±
The soil conditioner 29 is uniformly spread over the ridge 31, and the strength of the ridge 3 can be maintained.

The table below shows the unconfined compressive strength measured when the addition rate of the quality improving material 29 was varied when the stone powder 30 was mixed.

Usually, the ridge 3 is used for inputting small equipment for agricultural work or management, etc.
It is strong enough to not collapse even when walking or transporting it on a wheeled cart (3
Kgf/cm2), by adding the stone powder 30, the addition rate of the soil conditioner 29 can be lowered to 1.5%. Therefore, a strong ridge 3 that will not collapse or leak water can be constructed using only two soil improving materials.

Although one embodiment of the present invention has been described above in detail, it can be modified as appropriate within the scope of the gist of the present invention.

For example, the opening/closing mechanism of the gate 7 can be configured in five ways using magnetic force in addition to a motor, the gate 7 may also be of a type other than the slat type, and the gate 7 can also be opened/closed manually. Zarani, irrigation canal 1
If the water is lower than the paddy field 2, a submersible pump can be used as the water intake means. In addition, the present invention also applies to water 11 in addition to paddy fields.
It can also be applied to farmland for cultivation, etc.

[Effects of the Invention] As detailed above, according to the present invention, the water intake means provided between the irrigation canal and the farmland is automatically operated according to weather conditions, rice growth conditions, etc., and the water level in the farmland is always maintained. Since it is possible to maintain the water level optimally, there is no need to frequently go around to adjust the water level, thereby reducing labor for farmers and providing a water management system for farmland that can increase yields.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a block diagram, and FIG. 3 is a sectional view showing the structure of a ridge. 1... Irrigation canal Water 1) 3... 1f 4... Intake weir 7... Gate (water intake means) 8... Winding drum 9
... Piano wire 11 ... Float 13, 14.15
... Temperature sensor 16 ... Control means 21 ... Measuring section (measuring means) 22 ... Time control mechanism 24 ... Setting section
25...Storage unit 2G...Logic unit 27...Control unit

Claims (1)

[Claims] A water intake means provided between an irrigation canal and a farmland, a measurement means for detecting measurement data such as a water level and temperature in the farmland, and a control means for operating the water intake means based on the measurement data, A water management system for farmland that is characterized by automatically adjusting the water level within the farmland.