JPS60261820A - Controlling device for water level in rice paddy - Google Patents

Abstract

PURPOSE:To automatically feed water to a rice paddy, by a method wherein a night sensor, a high water level sensor, and a low water level sensor are located in a rice paddy, and a control part controls a gate so that a water level is regulated to a high value at night and is adjusted to a low value in the daytime. CONSTITUTION:A night sensor S3 which detects that it is in the night, and a low water level sensor S1 and a high water level sensor S2 which are actuated when a water level in a rice paddy 2 is increased to a high value and decreased to a low value, respectively, are located in the rice paddy. Based on the detecting value of each sensor, a control part C controls an intake gate 3 so that a water level in the rice paddy 2 is regulated to a high set value in the night and adjusted to a set low value in the daytime. This enables the rice paddy to be kept in a low depth in the daytime, resulting in the possibility to apply heat on the rice paddy 2 by means of a solar heat, and causes the rice paddy to be kept in a high depth in the night, resulting in the possibility to impart a potential heat, which an irrigation canal 1 has, to rice plants, and this enables provision of effective measure to prevent rice plants against cold-injury.

Description

[Detailed Description of the Invention] Industrial Application Field This invention is an automatic method of adjusting the water level in order to maintain the temperature of rice fields by keeping the water deep at night to make full use of the water temperature and by keeping the water shallow during the day to utilize solar heat. This relates to a control device that performs control.0 Conventional technologyIn order to promote the growth of rice, it is necessary to supply warm water to the paddy fields, and especially in cold weather, it is necessary to supply warm water to the paddy fields. To prevent this, it is important to provide hot water. For this purpose, during the daytime, water is raised shallowly to improve the heat absorption effect of the rice fields due to solar heat, and at night, for example, at dawn, the water in irrigation canals, whose temperature is rising due to solar heat and atmospheric heat, is raised closer to the sun. It is known that bringing deep water into rice fields is an effective measure against cold weather.

However, it is not easy to manually supply water at night, for example, so conventionally water is supplied in the evening to create deep water, and water from irrigation canals that has flowed through long rivers during the day and has sufficiently warmed up. Currently, it is not fully utilized for heat insulation.

Problems to be Solved by the Invention Therefore, the present invention automatically controls the water level so that the water is kept deep at night to fully utilize the retained heat of the supplied water, and during the day the water is kept shallow to warm the rice fields using solar heat. By doing so, rational water level control was achieved, and the following technical measures were taken.

The means to solve the problem are: an intake water gate (3) that supplies water to the rice field (no), a night sensor (S3) that detects nighttime, and a water intake gate (3) that supplies water to the rice field (no);
) has a low water level sensor (S□) and a high water level sensor (S2) that operate when the water level reaches the set low water level or the set high water level, respectively. A control section (9) is provided for controlling the intake water gate (3) so that the water level in the rice field is maintained at the set low water level.

Embodiments and Operations Next, embodiments of the present invention will be explained based on the drawings. In the first embodiment, a perspective view of the device is shown in FIG. 1, and a control circuit is shown in FIG. By switching the water intake shutter (5) provided on the water intake pipe (4) to full forward or reverse rotation of the water intake motor (6), the pinion (7) provided on the output shaft (7) of the water intake motor (6) 8) reciprocates between the water intake shutter (5) and one rack (9) to open the water intake pipe (4) to an appropriate area, and 7.1 is provided to shut off the water intake pipe (4). For example, when the set water level is low, which is the preferred water level in the daytime, the system turns off (
In the illustrated example, a low water level sensor (Sl) is configured such that the float (2) moves away from the terminal (2), and the low water level sensor (S1) is configured such that the float (1) is turned off when the set high water level is the preferred water level at night. A high water level sensor*S,) configured to be separated from the terminal (1, S3) and
The output of the night sensor (S,) is connected to A via NOT circuit 0.
Input the output of the input terminal for the ND circuit (oai input, low water level sensor - ms,) to the AND circuit (the other input terminal 01b of 111), and calculate the power for this AND circuit.
Input K to one input terminal (xh) of R circuit + IB, and input the output of night sensor (S3) to one input terminal (j3a) ic of AND circuit aS+, and output '? of high water level sensor (S2). The other input terminal (13b) of the AND circuit 13) [,
Input each input, and connect the output of the AND circuit QB+ to the OR circuit (
The other input terminal (tzb) of
The R circuit Q is connected to configure the control unit (C), and since the night sensor (S3) is turned on during the day, the H level output from the NOT circuit 1 is sent to the AND circuit field 1 due to the L level output. Therefore, when the set low water level is not reached, the low water level sensor (S,) is in the on state and the input terminal (ob) K also receives an H level input, and the OR circuit 11
H level is output from the smell, and the transistor ('l'r,)
and the drive relay (R turns on, the drive relay (turns on), and the drive circuit (■) drives the water intake motor (6) and all the water intake shutters (5) in the opening direction, for example, the water intake sluice gate (3).
When F5 is opened to a certain degree, the switch (Ll) is used to stop the opening rotation of the -C water intake motor (6), and water is supplied to the paddy field (2). rises, the low water level sensor (S,) turns off and the terminal (tl)
When the input terminal (nb) becomes L level, both the transistor (Tr) and the drive relay (■) turn off, and the drive circuit (6) moves the intake water gate (3) in the direction of closing the shutter (5). For example, when the water intake motor (6) is closed, the switch (L2) K is used to stop the water intake motor (6) from closing. At night, the night cell (S3) is turned off, so the output of the AND circuit (111) is always at L level;
The input terminal (33a) of the circuit tIB+ is the Hv belt,
When the water level of the foot tube has not reached the high water level sensor (S2
) is on, input terminal -R]3b) is also input with H level, and the outputs of AND circuit C181 and OR circuit - both become H level, and drive relay (2) turns on. When the intake water gate (3) opens and reaches the high water level set by n1, the high water level sensor (S2) turns off and the input terminal (13
Since b) becomes L level, the drive relay turns off, and the water intake motor (rotation) is driven in the direction of closing the water intake shutter (5), and the water intake gate (3) is closed, due to rain, etc. When the water level exceeds the set low water level during the day, and when the water exceeds the set high water level at night, the intake water gate (3) remains closed and water is reduced naturally. As shown in Table 1, the water intake sluice gate (3) is automatically opened and closed to maintain a low water level during the day and a high water level during the night.

Table 1: Opening/closing conditions for water intake sluice gates Next, the second embodiment, shown in perspective in Fig. 3 and in longitudinal side view in Fig. 4, has the structure of the first embodiment described above; ) has been added with a configuration for controlling drainage from the paddy field (2), and the drainage sluice μ which drains water from the rice field (2) to the drainage canal t141.
s) has the same structure as the above-mentioned intake water gate (3),
Drain pipe α6), shutter Uη, drain motor, output shaft (
1 Hata, Binion Co., Ltd., has a rack fall'i, and produces only one crop when the water level of the paddy field near the drainage water gate α5 is the set booth water level, which is, for example, between the set high water level and the set low water level above. A drain side sensor (S4) configured such that the flow drawer moves away from the terminal (t3) is provided, and the output of the drain side sensor (S4) is connected to the input terminal (23a)K of the AND circuit l&31 via the ThN0T circuit t221. Input,
The output of the NOT times [10] on the output side of the night sensor (S3) is connected to the other input terminal 7 (23b) of this AND circuit -).
and the output of the AND circuit example is a transistor (Tr).
, ) of the drive circuit (K1) through the drive relay (R8) of the drainage motor (e) k (to drive) the control unit (c,)
It consists of Th. Therefore, during the daytime, the input terminal +(z
3b) has an H level input, and when the water level on the drain side is higher than the set intermediate water level, the drain side sensor (s4) is turned off and the NOT circuit 12 [Since there is an L level input,
Input terminal (23a) becomes H) I level, AND circuit 1
There is an H level output from 83), which turns on the drive relay (R,), and the drain motor starts rotating in the direction of opening the drain shutter d'7).
When the drain water gate (15) opens to a certain degree, the drain motor (5) is stopped by the switch (L3), and the drive relay is activated except for the condition that the water level is above the set intermediate water level during the daytime. (R1) is turned off and the drainage motor (
For example, when the drain gate f15) is closed, the drain motor is stopped by the switch (L4), and the intake water gate and The opening and closing conditions of the drainage water gate are as shown in Table 2. Therefore, in this second embodiment, the drainage sluice gate is always closed at night, but during the day, the drainage sluice gate (
15) A device that drains water by opening and can actively manage the deep water condition of the platform during rainfall to a set water level without waiting for the water to naturally decrease as in the first embodiment. It is. The nighttime sensor (Ss) has a circuit configuration in which it is replaced with a sensor that detects that it is daytime, contrary to the above-mentioned embodiment shown in Table 2, Opening and Closing Conditions for Intake Sluice Gates and Drainage Sluice Gates. For example, a timer may be used as the nighttime sensor (S3) instead of the detection by the sensor. Control part (C), (
C, ), drive unit (2), (Kρ, water intake sluice (3), and drainage sluice (15) can also be the tl shown in the illustrated example, or others having similar functions.

Effects of the Invention As described above, the present invention includes a water intake sluice gate (3) that supplies water to a paddy field (2), a nighttime sensor (S2) that detects nighttime, and a water level setting for the paddy field (2). It has a low water level sensor (Sl) and a high water level sensor (S2) that operate when the water level reaches the low water level or the set high water level, respectively. A control unit 0 is installed to control the intake water gate (3) so that the water level in each rice field is maintained, so that the irrigation canal (1) is maintained at the deep water level at night. In the daytime, the paddy field (2) is warmed by solar heat as shallow water, and rational water management can be carried out automatically, and it is a countermeasure against cold damage. It is particularly effective as a

[Brief explanation of the drawing]

The figures show embodiments of the present invention, and between FIGS. 1 and 3 are perspective views of the apparatus in each embodiment, and FIGS. 2 and 5 show control circuit diagrams in FIGS. 1 and 3, respectively. FIG. 4 is a longitudinal sectional side view of FIG. 1. Code explanation (2)...Water 1) (3)...Intake sluice gate (Sl)...Low water level sensor (S2)...
・High water level sensor (S,)...Night sensor (cb
・・・-Control Department Procedures Suffix (Method) October 1, 1973 1 Display of Case Patent Application 1987-1 + 9fi93 No. 2 Name of Invention Water Level Control Device for Paddy Fields ILtsr Iseki Agricultural Machinery Co., Ltd. Name 4 Agent 〒 103 Tokyo "1"1" 1m 11-2 Kayabacho Hiki, O-ku (668) 7921-3 (6057) Patent attorney Kokichi Hayashi 11 +,,,,,,, -0iiJ 5. Amendment order Date: September 25, 1980 7, Amendment (1) The r'WJt diagram and all of the 3rd space J shown in the 10th line of the specification were amended to "Figures 1 and 3." do.

Claims (1)

[Claims] A water intake gate that supplies water to the rice fields, a night sensor that detects nighttime, and a low water level sensor and high water level sensor that operate when the water level in the rice field reaches the set low water level or the set high water level, respectively. and a control unit for controlling the intake water gate so that the water level in the paddy field is maintained at the above-mentioned high water level at night and at the above-mentioned low water level during the day. Features: Water level control device for rice fields.