JPH04252118A - Automatic irrigation apparatus - 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]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic irrigation system for a greenhouse garden.

0002

2. Description of the Related Art Hitherto, a timer control system and a solar radiation control system have been generally used as automatic irrigation systems. The timer control method uses a 24-hour timer to perform watering approximately 3 to 5 times a day during specified irrigation periods.These periods vary depending on the season, weather, growth stage of the plant, etc., so watering is performed each time. , determined by the administrator based on experience and intuition. In addition, the solar radiation control method automatically performs watering when a certain value is reached based on the cumulative value of solar radiation.Normally, since the cumulative value per minute fluctuates widely, irrigation is performed every 10 minutes or once.
Irrigation is performed based on the integrated value for each hour.

0003

[Problem to be Solved by the Invention] However, with the above-mentioned timer control method, since irrigation is performed at the set time, even if it is raining, irrigation is performed and water is wasted. There is. In order to prevent this waste, the administrator must stop the timer one by one. Furthermore, in the timer control method, the administrator must make detailed adjustments depending on the season, weather, growth stage of the plant, etc., which requires a lot of time for management. In addition, in the solar radiation control system, since the plants are not watered until after the daylight hours have passed and the plants have received sufficient sunlight, there is a risk that the plants may become water-deficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic irrigation system that requires less time for maintenance and can always supply plants with an appropriate amount of water.

[0005]

[Means for Solving the Problems] An automatic irrigation device according to the present invention has means for setting a daily irrigation time band and means for setting a single irrigation amount, and also stores daily sunshine times. a calendar mechanism, and a sunshine time determining means for determining whether it is sunshine time and issuing an irrigation command at the sunshine time, and a time control means for determining whether or not it is within the irrigation time zone. and an irrigation determining means that determines the necessity of irrigation and outputs an irrigation command if it is within the irrigation time band.

[0006]

[Operation] Based on the above-described configuration, the administrator first sets the daily irrigation time range and the amount of water at one time. Then, when power and water are supplied to the automatic irrigation device, the sunshine time determination means reads the sunshine time of that day in the calendar mechanism that stores the daily sunshine times. When it is determined that it is sunshine time, an irrigation command is issued and a certain amount of water is applied. Furthermore, when the watering period falls within the watering time band, the watering determining means judges whether or not watering is necessary based on the water condition around the roots of the plant, and if necessary, outputs a watering command to water a certain amount of water.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an electric circuit of an automatic irrigation system according to an embodiment of the present invention. The automatic irrigation device has CP
It includes various setting means for setting U, control conditions, and other sensors. As setting means, there are a means 1 for setting the daily irrigation time band, which includes a timer, etc., a means 2 for setting the amount of water per time, and a means 3 for setting the upper limit of the total amount of water for the day. There are a sensor 4a that measures the amount of moisture inside, a moisture measuring circuit 4, and the like.

[0009] In addition, within the CPU to which these means are connected, there is a calendar mechanism 5 that stores the sunshine time for each day, and a solar calendar mechanism 5 that judges whether or not the sunshine time has come and issues an irrigation command at the sunshine time. Time determination means 6, time control means 7 that determines whether or not the irrigation time is within the irrigation time band, irrigation determination means 8 that determines whether or not irrigation is necessary and outputs an irrigation command if it is within the irrigation time band, and the irrigation The external output circuit for irrigation 10 and its display LED 10a actuate the irrigation valves of each block of the greenhouse garden by the output of the command, and the total irrigation amount is measured and if the irrigation amount exceeds the set daily limit. It has a total amount determining means 9 etc. for stopping the irrigation operation.

[0010] A power source 11 and a keyboard (not shown) are connected to the automatic irrigation device, and setting values are inputted to the setting means 1, 2, and 3 by the keyboard and displayed on the liquid crystal display section 12. It is configured as follows.

[0011] The irrigation time band is set from 8:00 to 19:00 in consideration of the following.

[0012] Currently, farmers are attempting to produce high-quality products by shifting from quantity to quality of crops in consideration of demand trends. For example, in the cultivation of tomatoes, etc., in order to produce a large amount of sweetness, the water supply must be precisely managed.

[0013] In this case, for example, the irrigation time range is set from 6 o'clock to
If you set the time to 18:00 and water according to the percentage of moisture in the soil at that time, if 6:00 is before daylight, plants will not be active at night, so it will be difficult to irrigate because the moisture content in the soil is high. . For this reason, when plants begin to be active after the sunshine hours, they begin to rapidly consume water, resulting in a water shortage situation.

On the other hand, if 6 o'clock is after the sunshine time,
Plants become active after daylight hours and rapidly consume water, so there is a possibility that there will be a water shortage until the time of irrigation at 6 o'clock. In this case, if you water the plants at night, there will be a lot of water before the plants start becoming active, which may cause disease outbreaks. Therefore, the irrigation time range is from 8:00 a.m. to 1:00 a.m. after daylight hours.
The time is set at 9 o'clock, and in the present invention, the water is forcibly watered once at the time of daylight.

[0015] Furthermore, the amount of water per irrigation is predetermined by the water amount setting means 2, such that, for example, 2 liters are to be watered in 3 minutes. This will vary depending on the plants being cultivated, the season, etc., so the amount of watering will be determined as necessary. Also, the setting of the total amount of water per day is, for example, 20 per day.
Set it to 0 liters, and when this value is reached, the irrigation operation will be turned off. Although it is not necessary to set the total amount of water, it may be necessary if you want to make high-quality products.

The operation of this automatic irrigation system will be explained based on the flowchart shown in FIG. When the device is powered on,
The sunshine time determination means 6 determines whether or not the sunshine time of the day stored in the calendar mechanism 5 has come (S1
). When it is determined that it is sunshine time, it is determined whether or not this determination is the first one (S2). In the case of the first determination, a sub-timer (S3) is operated to perform irrigation by a preset amount of water. This irrigation amount is counted on a counter (S4
), are integrated by the total amount determining means 9 (S5). Note that in S2, the judgment state is reset every 24 hours.

[0017] In S1, it is determined that it is sunshine time, and
If it is determined in step 2 that it is not the first determination, it is determined whether or not it is within the time set by the irrigation time band setting means 1 (S6). If it is within the set irrigation time band, the moisture in the soil is measured by the moisture sensor 4a and the moisture measuring circuit 4. If there is enough water, it is determined that irrigation is not necessary, and if there is insufficient water, it is determined that irrigation is necessary. A determination is made (S7) and an irrigation command is output to the sub-timer (S3). The sub-timer operates the external irrigation circuit 10 to cause the irrigation machines of each block to perform irrigation.

[0018] The amount of irrigation is counted by a counter (S4
), are integrated by the total amount determining means 8 (S5). When the integrated amount reaches the amount set by the daily total amount setting means 3, the irrigation for that day is stopped, and if the integrated amount does not reach the set daily amount, the irrigation is continued (S5).

[0019]

As explained above, since the automatic watering device according to the present invention always performs watering at the time of daylight, the plants will not run out of water after the time of daylight. Additionally, since watering is performed after determining whether or not watering is necessary within the set watering time band, unnecessary watering is not performed, water is not wasted, and water is provided at the appropriate level for the plants. can be supplied.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electric circuit of an automatic irrigation device according to an embodiment of the present invention.

FIG. 2 is a flowchart in this embodiment.

[Explanation of symbols]

1 Irrigation time band setting means 2. Irrigation amount setting means 5 Calendar mechanism 6. Sunshine time determination means 7 Time control means 8 Irrigation determination means

Claims (1)

[Claims] Claim 1: It has a means for setting a daily irrigation time band, a means for setting a single irrigation amount, a calendar mechanism that stores the daily sunshine time, and a calendar mechanism that stores the sunshine time for each day. It has a sunshine time determination means that makes a judgment and issues an irrigation command when it is sunshine time, and further includes a time control means that determines whether or not it is within the irrigation time zone, and a time control means that determines the necessity of irrigation if it is within the irrigation time zone. An automatic irrigation device characterized by comprising: irrigation determination means for making a determination and outputting an irrigation command.