JPH05316886A - Device for preventing freezing and frost damage of lawn - Google Patents

Abstract

PURPOSE:To automatically prevent freezing and frost damage of lawn by simple operation. CONSTITUTION:A device for preventing freezing and frost damage of lawn consists of a blast fan 6 rotatably installed above a base 3 having caster wheels 2 on the underside, a temperature sensor 10 and a control device 9 for regulating rotation of the blast fan 10 when the detected temperature by the temperature sensor 10 is <= a set temperature. When the temperature of the open air is dropped and the detected temperature by the temperature sensor 10 is <= the set temperature, the blast fan 6 is revolved by a control signal from the control device 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frost damage prevention device for preventing damage to a lawn that is dried up due to frost on a golf course, a park or the like.

[0002]

2. Description of the Related Art In a conventional golf course, for example, in order to prevent damage due to frost on the lawn due to a decrease in outside temperature at night,
A worker was covering a large sheet of grass on the lawn.

[0003]

According to this conventional method, the work of covering a large sheet of grass on a lawn is time-consuming, and the number of sheets to be covered is large on a large lawn area such as a golf course. There was a problem that requires a lot of labor.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a preventive device capable of automatically and efficiently preventing frost damage on a lawn by a simple operation.

[0005]

To achieve this object, the present invention is directed to a blower fan rotatably provided above a base having caster wheels on the lower surface, a temperature sensor for detecting the outside air temperature, and the temperature sensor. And a control device for controlling the rotation of the blower fan when the detected temperature is less than a set temperature.

[0006]

[Operation] Move the frost damage prevention device on the lawn and stop it.
The outside air temperature is detected by a temperature sensor, and when the temperature detected by the temperature sensor becomes equal to or lower than a set temperature, a blower fan is rotated by the control device, and the wind generated by the blower fan prevents frost damage on the lawn.

[0007]

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

Reference numeral 1 denotes a frost damage prevention device, and the prevention device 1
Is a base 3 having, for example, three caster wheels 2 ...
A frame 4 is rotatably supported by a main shaft 5 on an upper surface of the frame 4, and a wind tunnel 7 in which a blower fan 6 is axially supported is fixed to the frame 4, and the frame 4 on the side of the wind tunnel 7 is fixed.
The control panel 8 is fixed to the.

A control device 9 is provided in the control panel 8, and a control system by the control device 9 is shown in FIG. 2. In FIG. 2, 10 is a temperature sensor and 11 is a wind speed sensor. , 12 are humidity sensors, and these temperature sensor 10, wind speed sensor 11 and humidity sensor 12
Is connected to the first input side of the first to third comparison circuits 14a to 14c via the signal conversion circuit 13 including, for example, an A-D converter, and these first to third comparison circuits 14a are also connected.
The setter 15 was connected to the 2nd input side of -14c.

The output sides of the first comparison circuit 14a and the second comparison circuit 14b are connected to the first and second input sides of a first condition control circuit 16 composed of an AND circuit, and the first condition control circuit is connected. 16 and the output side of the third comparison circuit 14c are connected to a second condition control circuit 17 composed of an AND circuit,
The output side of the condition control circuit 17 is connected to the first side via the drive circuit 18.
It was connected to the second motors 19a and 19b.

Then, the first to third comparison circuits 14a to 1
4b, setting device 15 and first and second condition control circuits 16 and 17
The control device 9 is configured by the above.

Then, the first motor 19a is transmission-coupled to the blower fan 6 through a speed reducing mechanism, and the second motor 1 is also connected.
9b is transmission-coupled to the frame 4 having the wind tunnel 7 via a speed reducing mechanism and a rotation / oscillation converting mechanism.

Next, the operation of the frost damage prevention device 1 of the above embodiment will be described.

For example, the frost damage prevention device 1 is moved and set on the lawn of each course in the evening after playing at a golf course. Then, when the night outside air temperature becomes low and the temperature detected by the temperature sensor 10 becomes equal to or lower than the set temperature, an output is generated from the first comparison circuit 14a, and the first comparison circuit 16 and the first and second condition control circuits 16 and 17 and the drive circuit 18 generate the first output. Second motor 1
The blower fan 6 rotates while the wind tunnel 7 swings within a range of a predetermined rotation angle together with the frame 4 by rotating and driving 9a and 19b, and sends wind to the lawn to prevent frost damage.

Then, in the morning of the next day, when the outside air temperature rises and the temperature detected by the temperature sensor 10 exceeds the set temperature, the output from the first comparison circuit 14a becomes zero, and the first and second
The rotation of the motors 19a and 19b is automatically stopped to stop blowing the grass.

However, when the natural wind is blowing on the lawn at a wind speed higher than a predetermined wind speed, the natural wind is under the condition that the frost damage on the lawn can be prevented. Therefore,
The wind speed of this natural wind is detected by the wind speed sensor 11,
When the detected wind speed is equal to or higher than the set wind speed, the output from the second comparison circuit 14b becomes zero, and as a result, the output from the first condition control circuit 16 becomes zero, and the first air temperature is equal to or lower than the set temperature. The second motors 19a, 19b are not rotated and thus there is no air blown to the lawn.

If the humidity detected by the humidity sensor 12 is not higher than the set humidity in the case where there is no risk of frost damage on the lawn due to dry air, the output from the third comparison circuit 14c becomes zero, As a result, the output from the second condition control circuit 17 is set to zero, and the first and second motors 19a and 19b are not rotated even when the outside air temperature is equal to or lower than the set temperature, and thus, no air is blown to the lawn.

FIG. 3 shows another embodiment. In this embodiment, the output from the temperature sensor 10 is passed through a signal conversion circuit 13 composed of, for example, an AD converter, and a first comparison circuit 14 is provided.
a is connected to the first input side, and the first comparison circuit 14
The second input side of a is connected to the setting device 15, and the first and second motors 19a and 19b are directly connected to the output side of the first comparison circuit 14a via the drive circuit 18, and the outside air temperature is When the temperature decreases and the temperature detected by the temperature sensor 10 is equal to or lower than the set temperature, the output from the first comparison circuit 14a sends air to the lawn.

[0019]

As described above, according to the present invention, when the outside air temperature detected by the temperature sensor is equal to or lower than the set temperature, the rotation control of the blower fan provided above the automatically movable base is performed. Therefore, it is possible to automatically prevent frost damage when it reaches the outside air temperature that may cause frost damage to the lawn, and it is not necessary to cover a large sheet of grass on the lawn as in the past, and the work is extremely easy. Have the effect of becoming.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a block diagram of a control system.

FIG. 3 is a block diagram of a control system according to another embodiment of the present invention.

[Explanation of symbols]

 1 Frost damage prevention device 2 Caster wheels 3 units 6 Blower fan 9 Control device 10 Temperature sensor 11 Wind speed sensor 12 Humidity sensor 16 First condition control circuit 17 Second condition control circuit

Claims (3)

[Claims] 1. A blower fan rotatably provided above a base having caster wheels on the lower surface, a temperature sensor for detecting the outside air temperature, and the blower fan when the temperature detected by the temperature sensor is below a preset temperature. A frost damage prevention device for a lawn, comprising a control device for controlling rotation of the lawn. 2. A wind speed sensor is provided, and the control device is provided with a first condition control circuit for stopping the rotation of the blower fan when the wind speed detected by the wind speed sensor is equal to or higher than a set wind speed. The frost damage prevention device for a lawn according to claim 1. 3. A humidity sensor is provided, and the control device is provided with a second condition control circuit for stopping the rotation of the blower fan when the humidity detected by the humidity sensor is equal to or lower than a set humidity. The frost damage prevention device for a lawn according to claim 2.