TWI739191B - Anti-frost device, control device for anti-frost fan, and method for controlling anti-frost fan - Google Patents

Abstract

An anti-frost device (1-1) includes: an anti-frost fan (11), arranged at a hight at which an inversion layer (X) of a field is generated and configured to blow wind down to the field; a generator (15), acting as a driving source of the anti-frost fan (11); a temperature sensor (12), configured to detect a temperature of a leaf surface or a temperature near the leaf surface of a crop (A) in the field; a control device (14), confiugured to transmit an operation signal for starting operation of the generator (15); and a battery (18), configured to supply power to the control device (14). When the control device (14) transmits the operation signal to the generator (15) and receives the power generation establishment signal from the generator (15), the generator (15) supplies power to the anti-frost fan (11).

Description

Anti-frost device, anti-frost fan control device and anti-frost fan control method

The invention relates to an anti-frost device, an anti-frost fan control device and an anti-frost fan control method.

Generally, the drive source of the anti-frost fan uses an external power source such as power from a power transmission line. However, most of the production areas of crops that are prone to frost damage are also mountainous areas where it is difficult to secure an external power source. As an anti-frost device including a generator, for example, the anti-frost device described in Japanese Patent Laid-Open No. 2008-61526 of Patent Document 1 and Japanese Patent Laid-Open No. 11-56126 of Patent Document 2 can be cited. Among them, these inventions incidentally include a generator. When the anti-frost fan is not used, wind power is generated, and the anti-frost device is used as a secondary wind generator.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2008-61526

[Patent Document 2] Japanese Patent Laid-Open No. 11-56126

The generator included in the anti-frost device described in Patent Document 1 and Patent Document 2 is not used as a driving source of the anti-frost fan. Therefore, these inventions cannot use the anti-frost fan in places where it is difficult to secure an external power source.

The present invention is made in view of the above situation, and aims to provide an anti-frost device, anti-frost fan control device, and anti-frost fan control method that can use an anti-frost fan even in places where it is difficult to secure an external power source.

In order to achieve the above object, the anti-frost device of the first aspect of the present invention includes: an anti-frost fan installed at the height of the inversion layer in the field and blowing the wind down to the field; the first sensor detects at least the amount of crops in the field The temperature of the leaf surface or near the leaf surface; the generator is the driving source of the anti-frost fan; the control device, based on the detection value of the first sensor, sends an operation signal to make the generator run; and the battery, to the control device Power is supplied, and when the control device sends the operation signal to the generator and receives the power generation establishment signal from the generator, the power of the generator is supplied to the anti-frost fan.

The control device can send an operation signal to the generator when the detection value of the first sensor is lower than the first set temperature, and based on the detection value of the first sensor, determine the growth stage of the crops in the field, and determine The first set temperature corresponding to the growth stage of the crops in the determined field.

The control device may determine the first set temperature based on the growth limit temperature, and the growth limit temperature corresponds to the growth stage of the crops in the field determined based on the detection value of the first sensor.

The control device can calculate the difference between the reference temperature and the average value of the detection value of the first sensor in one day when the average value of the detection value of the first sensor in one day exceeds the reference temperature, and based on the difference The cumulative value from the calculation start date to the current day is used to determine the growth stage of the crops in the field.

The anti-frost device of the first aspect of the present invention may further include: a second sensor that detects the temperature at the height of the temperature inversion layer, and the control device may detect that the value of the first sensor is lower than the first set temperature, And when the value obtained by subtracting the detection value of the first sensor from the detection value of the second sensor is greater than the second set temperature, an operation signal is sent to the generator.

The anti-frost device of the first aspect of the present invention can include a heater for temperature rise in the field, and the control device can detect a value lower than the first set temperature by the first sensor and the value detected by the second sensor If the value obtained by subtracting the detection value of the first sensor is below the second set temperature, start the operation of the heater.

The anti-frost fan control device of the second aspect of the present invention sends an operation signal to the generator to operate the generator based on the detection value of the first sensor that detects at least the leaf surface of the crop in the field or the temperature near the leaf surface, The above-mentioned generator is the driving source of the anti-frost fan that is installed at the height of the inversion layer and blows down the wind to the field, and the anti-frost fan control device sends the operation signal to the generator and receives it from the generator When the power generation is established, the power of the generator is supplied to the anti-frost fan.

The anti-frost fan control method of the third aspect of the present invention is an anti-frost fan control method executed by an anti-frost device. The anti-frost device includes: an anti-frost fan installed at the height of the field where the inversion layer is generated and blowing the wind down To the field; the first sensor, at least detects the temperature of the leaf surface of the crops in the field, or the temperature near the leaf surface; The machine is the driving source of the anti-frost fan; the control device sends an operation signal to the generator to run the generator based on the detection value of the first sensor; and the battery supplies power to the control device, and the anti-frost fan The control method includes: the step of sending an operation signal to the generator; the step of receiving a power generation establishment signal from the generator; and the step of supplying the power of the generator to the anti-frost fan.

According to the present invention, the anti-frost fan can be used even in places where it is difficult to secure an external power source.

1-1, 1-2, 1-3‧‧‧Anti-frost device

11, 11A, 11B, 11C‧‧‧Frost-proof fan

12、13‧‧‧Temperature sensor

14‧‧‧Control device

15‧‧‧Generator

16‧‧‧Sunlight Panel

17‧‧‧Heater

18‧‧‧Battery

43‧‧‧Control Box

44, 44A, 44B, 44C‧‧‧Electromagnetic switch

45‧‧‧Leakage resistor breaker

46A, 46B, 46C‧‧‧Wiring blocker

47‧‧‧Transformer

48A, 48B‧‧‧Sequential transmission timer

100‧‧‧Column

141‧‧‧Type Acquisition Department

142‧‧‧Storage Department

143‧‧‧Detection signal receiver

144‧‧‧Growth Stage Judgment Department

145‧‧‧Frost-proof fan control unit

A‧‧‧Crops

X‧‧‧Inversion layer

S11~S17, S21~S28, S31~S40, S51~S64‧‧‧Step

Figure 1 is a schematic diagram of the anti-frost device and the field of Embodiment 1 of the present invention.

Fig. 2 is a diagram showing an example of the functional configuration of the control device of the first embodiment.

Figure 3 is a schematic diagram illustrating the power control of the anti-frost fan performed by the control device of the first embodiment.

Fig. 4 is a diagram showing an example of growth stage information in the first embodiment.

Fig. 5 is a diagram showing an example of the growth limit temperature information in the first embodiment.

Fig. 6 is a flowchart showing the growth stage judging process in the first embodiment.

Fig. 7 is a flowchart showing the generator control processing in the first embodiment.

Figure 8 is a schematic diagram of the anti-frost device and the field of Embodiment 2 of the present invention.

Fig. 9 is a diagram showing an example of the functional configuration of the control device of the second embodiment.

Fig. 10 is a flowchart showing the generator control processing of the second embodiment.

Figure 11 is a schematic diagram of the anti-frost device and the field of Embodiment 3 of the present invention.

Fig. 12 is a diagram showing an example of the functional configuration of the control device of the third embodiment.

Fig. 13 is a flowchart showing the control process of the generator heater in the third embodiment.

Hereinafter, with reference to the drawings, the anti-frost device, the anti-frost fan control device, and the anti-frost fan control method of the embodiment of the present invention will be described in detail. In addition, in the figures, the same or equivalent parts are marked with the same symbols.

(Embodiment 1)

Figure 1 is a schematic diagram of the anti-frost device 1-1 and the field of Embodiment 1 of the present invention. The anti-frost device 1-1 includes: a field column 100; an anti-frost fan 11, which is arranged at the upper end of the column 100; a temperature sensor 12, which is arranged in the field; a control device 14, which is arranged under the column 100; and a generator 15 , Installed in the field; and the solar panel 16, installed on the upper part of the column 100.

The anti-frost fan 11 is installed at the height of the inversion layer X at the upper end of the column 100. The anti-frost fan 11 rotates with the electric power from the generator 15 and blows down the warm air flow of the inversion layer X to the area including the crop A in the field. The anti-frost fan 11 includes a motor, a shaking head mechanism, a depression angle mechanism, and the like. The anti-frost fan 11 rotates when the electric power from the generator 15 is supplied, and stops rotating when the electric power supply from the generator 15 is stopped.

The temperature sensor 12 detects the temperature of the leaf surface of the crop A or near the leaf surface. The position where the temperature sensor 12 is set can be changed according to the position of the leaf surface of the crop A. The temperature sensor 12 calculates the average value of the measured value of the leaf surface of the crop A or the temperature near the leaf surface for one day. Hereinafter, the average value of the measured values of the temperature sensor 12 for one day is referred to as the low-place average temperature. The temperature sensor 12 transmits the average low temperature as a detection value to the control device 14. Furthermore, the temperature sensor 12 can also send the measured value to the control device 14, and the control device 14 can calculate the average value for one day. The temperature sensor 12 is, for example, installed at a position that is not affected by the wind of the anti-frost fan 11 and/or natural wind. The temperature sensor 12 is an example of the first sensor of the present invention.

It is known that crops have an index of growth limit temperature. The above growth limit temperature refers to the temperature at which damage may occur even if the damage is small when the body temperature of the plant is maintained at this temperature for a certain period of time. The value of the growth limit temperature varies according to the type or growth stage of the crop. The control device 14 uses this index to determine whether to operate the anti-frost fan 11.

The control device 14 determines the growth stage of the crop A based on the low average temperature as the detection value of the temperature sensor 12. The control device 14 determines the growth limit temperature of the crop A according to the type of the crop A and the growth stage of the crop A. The control device 14 determines the first set temperature for determining whether to operate the anti-frost fan 11 based on the growth limit temperature of the crop A. The first set temperature is set to a temperature higher than the growth limit temperature. The control device 14 starts the generator 15 and starts the operation of the anti-frost fan 11 when the average low temperature is less than the first set temperature. The control device 14 stops the generator 15 and stops the operation of the anti-frost fan 11 when the average low temperature is ≥ the first set temperature + γ. γ is any value above 0.

An example of the operation control of the anti-frost fan 11 is shown below. The control device 14 sends an operation signal instructing operation to the generator 15 when the average low temperature is lower than the first set temperature. The operation signal is continuously sent to the generator 15. The generator 15 that has received this signal is started, and when it is in a state where the power can be stably supplied, a power generation establishment signal is sent to the control device 14. During the period in which the power can be stably supplied, the power generation establishment signal is continuously sent to the control device 14. When the control device 14 receives the power generation establishment signal, the electromagnetic switch of the generator 15 is turned on (ON), and the electric power of the generator 15 is supplied to the anti-frost fan 11. The anti-frost fan 11 starts to operate when power is supplied. In the case where there are a plurality of anti-frost fans 11, in order to prevent the starting current from increasing, the control device 14 may be configured to issue a command according to the time difference so that the operation of the anti-frost fans 11 starts sequentially.

An example of the stop control of the anti-frost fan 11 is shown below. The control device 14 stops sending the operation signal to the generator 15 when the average temperature of the low place becomes the first set temperature+γ or more. The generator 15 stops when it does not receive the operation signal. The control device 14 turns off (OFF) the electromagnetic switch of the generator 15 and stops the power supply to the anti-frost fan 11. The anti-frost fan 11 stops operating when the power supply is stopped.

The control device 14 obtains driving power from a battery (battery) 18, which is charged with electricity generated by the solar panel 16 using sunlight. The power source of the control device 14 is not limited to the electricity generated by the solar panel 16, and may include a separate battery, or it may obtain driving power from a battery for starting the starter motor included in the generator 15.

When the electricity generated by the solar panel 16 is used as the power source of the control device 14, the user does not need to charge the battery. In addition, if the battery 18 is installed on the upper part of the column 100, theft is prevented. To set a separate battery as control In the case of the power supply of the device 14, the user performs charging when the voltage drops. When the battery for starting the starter motor is used as the power source of the control device 14, the generator 15 is operated during regular inspections and it takes time to charge the battery.

In Figure 1, an anti-frost device 1-1 including one column 100, an anti-frost fan 11, a temperature sensor 12, a control device 14, a generator 15, and a solar panel 16 is described. However, among these components The number is not limited to one, respectively. For example, a plurality of anti-frost fans 11 may be installed relative to one column 100, or a plurality of vertical columns 100 including the anti-frost fans 11 may be installed in the field. In addition, one or more control devices 14 can also control multiple anti-frost fans 11 and generators 15.

The functional configuration of the control device 14 will be described using FIG. 2 and FIG. 3. As shown in FIG. 2, the configuration of the control device 14 includes a type acquisition unit 141, a storage unit 142, a detection signal receiving unit 143, a growth stage determination unit 144, and an anti-frost fan control unit 145. These functions are realized by the control box (BOX) 43 shown in Fig. 3.

The control box 43 includes, for example, a central processing unit (CPU), a random-access memory (Random-Access Memory, RAM), a non-volatile memory, an interface for connecting with other devices, and the like. The CPU loads the control program stored in the non-volatile memory to the RAM. The CPU executes various processes of the type acquisition unit 141, the detection signal receiving unit 143, the growth stage determination unit 144, and the anti-frost fan control unit 145 in accordance with the loaded control program. The storage unit 142 is configured as a non-volatile memory.

The battery 18 stores electricity generated by the solar panel 16 and supplies electricity to the control device 14. The battery 18 can be assembled inside the control device 14.

Returning to FIG. 2, the type acquisition unit 141 acquires type information indicating the type of crop A cultivated in the field. The category acquisition unit 141 may include an input device such as a touch panel or a button, and may also include a communication device that receives category information. In addition, in the case where the type of crop A cultivated in the field is determined and set as the anti-frost device 1-1 dedicated to the type of crop, the control device 14 may not include the type acquisition unit 141.

The storage unit 142 stores the category information acquired by the category acquisition unit 141. The storage unit 142 pre-stores: reference information, which represents a reference for determining the growth stage; and growth limit temperature information, which represents the growth limit temperature of each growth stage according to the type of crop. The details of the reference information and the growth limit temperature information will be described later.

The detection signal receiving unit 143 receives a signal indicating the detection value (the average temperature of the low place) from the temperature sensor 12. The detection signal receiving unit 143 stores the low-place average temperature information indicating the low-place average temperature in the storage unit 142.

The growth stage determination unit 144 determines the current growth stage of the crop A based on the average low temperature indicated by the low average temperature information stored in the storage unit 142.

Regarding the method of judging the growth stage, an example will be explained. The growth stage determination unit 144 determines whether or not the average low temperature exceeds the reference temperature. When the average low temperature exceeds the reference temperature, the growth stage determination unit 144 calculates the difference between the reference temperature and the average low temperature, and calculates the cumulative value from the calculation start date to the current day. Hereinafter, "cumulative value" refers to the cumulative value of the difference between the reference temperature and the average temperature of the low place from the calculation start date to the current day. According to the types of crops, the range of the cumulative value of each growth stage is determined, and the growth stage determination unit 144 determines that the growth stage reaches the range that includes the calculated cumulative value.

The reference information stored in the storage unit 142 includes: reference temperature information, which represents the reference temperature according to the type of crop; and growth stage information, which represents the range of the cumulative value of each growth stage according to the type of crop.

Here, the growth stage information included in the reference information stored in the storage unit 142 will be described using FIG. 4. For example, tea plants have growth stages of "before budding", "sprouting period", "one-leaf period", "two-leaf period", "three-leaf period", "four-leaf period", "five-leaf period" and "picking period". The range of the cumulative value reaching each growth stage is 0℃~40℃, 41℃~50℃, 51℃~80℃, 81℃~120℃, 121℃~180℃, 181℃~230℃, 231℃~ 280℃, and 281℃~310℃. The storage unit 142 stores the growth stage information representing the range of the cumulative value of each growth stage as shown in FIG. 4 and the reference temperature information representing the reference temperature as reference information according to the types of crops.

Returning to FIG. 2, the growth stage determination unit 144 first refers to the type information stored in the storage unit 142 to determine the reference temperature information and the growth stage information of the type of crop A. When the low-place average temperature information is stored in the storage section 142, the growth stage determining section 144 calculates the cumulative value based on the low-place average temperature information and the reference temperature information of the type of crop A. The growth stage determination unit 144 refers to the growth stage information of the type of crop A, and based on the accumulated value, determines which growth stage the crop A is currently in.

The growth stage determination unit 144 transmits the growth information indicating the current growth stage of the crop A to the anti-frost fan control unit 145. Furthermore, the growth stage judging unit 144 can also compare the growth stage judged last time with the growth stage judged this time, and only send the growth information to the anti-frost fan control unit 145 when the growth stage changes.

When the anti-frost fan control unit 145 receives the growth information from the growth stage determination unit 144, it refers to the growth limit temperature information stored in the storage unit 142, and determines the first set temperature based on the growth limit temperature of the crop A.

Here, the growth limit temperature information stored in the storage unit 142 will be described using FIG. 5. Figure 5 shows the growth limit temperature of tea trees quoted from the publication as an example. For the growth stages of tea trees "before budding", "sprouting period", "one-leaf period", "two-leaf period", "three-leaf period", "four-leaf period", "five-leaf period" and "picking period", set -4.6 respectively ℃, -3.0℃, -2.0℃, -2.0℃, -2.0℃, -1.8℃, -1.7℃ and -2.5℃ are regarded as the growth limit temperature. The storage unit 142 stores the growth limit temperature information indicating the growth limit temperature of each growth stage as shown in FIG. 5 according to the types of crops.

Return to Figure 2 and explain the specific method for determining the first set temperature. The anti-frost fan control unit 145 first refers to the type information stored in the storage unit 142 to determine the growth limit temperature information of the type of crop A. When the anti-frost fan control unit 145 receives the growth information from the growth stage determining unit 144, it refers to the growth limit temperature information of the type of crop A, and determines the first set temperature based on the growth limit temperature corresponding to the current growth stage of the crop A . The first set temperature is set to growth limit temperature +3.0°C in consideration of early response, for example. For example, when the type of crop A is tea and the current growth stage is the budding stage, the growth limit temperature is -3.0°C (refer to Fig. 5), so the first set temperature is set to 0.0°C.

When the low-place average temperature information is stored in the storage section 142, the anti-frost fan control unit 145 determines whether the low-place average temperature is lower than the first set temperature. The anti-frost fan control unit 145 sends an operation signal to the generator 15 when the average low temperature is lower than the first set temperature. Generator 15 receiving operation signal It starts, and when it becomes a state in which electric power can be stably supplied, a power generation establishment signal is sent to the control device 14. When receiving the power generation establishment signal from the generator 15, the anti-frost fan control unit 145 turns on the electromagnetic switch to supply the electric power of the generator 15 to the anti-frost fan 11 and start the operation of the anti-frost fan 11. The anti-frost fan control unit 145 stops the transmission of the operation signal when the average temperature of the low place becomes equal to or higher than the first set temperature + γ. The anti-frost fan control unit 145 turns off the electromagnetic switch, stops supplying the electric power of the generator 15 to the anti-frost fan 11, and stops the operation of the anti-frost fan 11. Furthermore, the anti-frost fan control unit 145 may stop the operation of the anti-frost fan 11 when the power generation establishment signal from the generator 15 is not received and/or the power generation abnormal signal is received from the generator 15.

An example of the power control of the anti-frost fan 11A to the anti-frost fan 11C by the control device 14 will be described using FIG. 3. The control box 43 transmits an operation signal to the generator 15 when the average temperature at the low point as the detection value of the temperature sensor 12 (not shown) is lower than the first set temperature. The generator 15 that has received the operation signal is started, and when it is in a state where the power can be stably supplied, a power generation establishment signal is sent to the control device 14. When the control box 43 receives the power generation determination signal from the generator 15, the electromagnetic switch 44 is turned on. In the third example, the control box 43 uses the sequential transfer timer 48A and the sequential transfer timer 48B to sequentially conduct the electromagnetic switch 44A, the electromagnetic switch 44B, and the electromagnetic switch 44C according to the time difference. The electric power of the generator 15 is sequentially supplied to the anti-frost fan 11A, the anti-frost fan 11B, and the anti-frost fan 11C according to the time difference. The anti-frost fan 11A, the anti-frost fan 11B, and the anti-frost fan 11C start to operate according to the time difference. Furthermore, when the anti-frost fan 11A, the anti-frost fan 11B, and the anti-frost fan 11C start to operate at the same timing, the control device 14 may not include the electromagnetic switch 44C, The electromagnetic switch 44B and the electromagnetic switch 44A, and the sequential transmission timer 48A and the sequential transmission timer 48B.

When the average temperature of the control box 43 becomes higher than the first set temperature+γ, the transmission of the operation signal is stopped, and the electromagnetic switch 44C, the electromagnetic switch 44B, the electromagnetic switch 44A, and the electromagnetic switch 44 are turned off. The generator 15 stops when it does not receive the operation signal. The power supply of the generator 15 to the anti-frost fan 11C, the anti-frost fan 11B and the anti-frost fan 11A is stopped, and the operation of the anti-frost fan 11A, the anti-frost fan 11B and the anti-frost fan 11C are stopped. In addition, the control box 43 not only receives the power generation establishment signal from the generator 15 and/or the power generation abnormal signal from the generator 15 not only when the average low temperature becomes the first set temperature + γ or more. At this time, the electromagnetic switch 44C, the electromagnetic switch 44B, the electromagnetic switch 44A, and the electromagnetic switch 44 are turned off.

The leakage resistor breaker 45 blocks the circuit when leakage is detected. The wiring blocker 46A, the wiring blocker 46B, and the wiring blocker 46C block the circuit when an overcurrent is detected. The transformer 47 transforms the power of the generator 15 into the control voltage (AC200 V) of the anti-frost fan 11A, the anti-frost fan 11B, and the anti-frost fan 11C and supplies it.

The control device 14 is not limited to one device, and may be implemented by multiple devices. For example, an anti-frost fan control device including the function of the anti-frost fan control unit 145 shown in FIG. 2 may also be provided. The anti-frost fan control device has, for example, the same configuration as the control device 14 shown in FIG. 3.

Next, examples of the growth stage determination processing and the generator control processing as the main processing executed by the control device 14 will be described using FIGS. 6 and 7. FIG. First, the flow of the growth stage determination processing executed by the control device 14 will be explained using FIG. 6. The growth stage determination process shown in Figure 6 is based on It starts by turning on the power to the control device 14 from the battery 18. The growth stage determination unit 144 of the control device 14 determines whether or not the low-place average temperature information is stored in the storage unit 142 (step S11).

In the case where the low-place average temperature information is not stored in the storage unit 142 (step S11: NO), the growth stage determination unit 144 repeats step S11 and waits for the low-place average temperature information to be stored in the storage unit 142. When the low-place average temperature information is stored in the storage unit 142 (step S11: YES), the growth stage judging unit 144 refers to the type information stored in the storage unit 142 and the reference temperature information contained in the reference information, and judges low Whether the average temperature exceeds the reference temperature (step S12). When the average low temperature does not exceed the reference temperature (step S12: No), the growth stage determining unit 144 repeats steps S11 and S12, and waits for the average low temperature to exceed the reference temperature. When the average low temperature exceeds the reference temperature (step S12: Yes), the growth stage determining unit 144 calculates the difference between the reference temperature and the average low temperature (step S13), and calculates the cumulative value (step S14).

The growth stage determination unit 144 refers to the growth stage information included in the reference information of the type of the crop A to determine the current growth stage of the crop A (step S15). The growth stage determination unit 144 transmits the growth information indicating the current growth stage of the crop A to the anti-frost fan control unit 145 (step S16). If the power of the control device 14 is not turned off (step S17: No), return to step S11, and repeat step S11 to step S17. When the power is turned off (step S17: Yes), the process ends. The growth stage judging section 144 transmits the growth information to the frost-proof fan control section 145 only when the growth stage changes. After step S15, the growth stage judged last time and the growth stage judged this time are set after step S15. Step to compare the stages, and move to step S16 only when the growth stage changes.

In step S16, the anti-frost fan control unit 145 that has received the growth information refers to the category information and the growth limit temperature information stored in the storage unit 142, and determines the first set temperature based on the growth limit temperature corresponding to the current growth stage of the crop A .

Next, the flow of the generator control process executed by the control device 14 will be explained using FIG. 7. The generator control process shown in FIG. 7 is started by turning on the power from the battery 18 to the control device 14. In Fig. 7, the average low temperature is set to L, and the first set temperature is set to α. The anti-frost fan control unit 145 of the control device 14 determines whether or not the average low temperature L is lower than the first set temperature α (step S21).

When the low-place average temperature L is greater than or equal to the first set temperature α (step S21: No), the anti-frost fan control unit 145 repeats step S21 and waits for the low-place average temperature L to be lower than the first set temperature α. When the low-place average temperature L is lower than the first set temperature α (step S21: Yes), the anti-frost fan control unit 145 sends an operation signal to the generator 15 (step S22). The generator 15 receives the operation signal and starts it, and when it becomes a state where the power can be stably supplied, it sends a power generation establishment signal to the control device 14. When the power generation establishment signal is not received from the generator 15 (step S23: No), the anti-frost fan control unit 145 repeats step S23 and waits for the power generation establishment signal to be received. When the power generation establishment signal is received from the generator 15 (step S23: Yes), the anti-frost fan control unit 145 turns on the electromagnetic switch, and supplies the electric power of the generator 15 to the anti-frost fan 11, and starts anti-frost The operation of the fan 11 (step S24).

When the low-place average temperature L is lower than the first set temperature α+γ (step S25: No), the anti-frost fan control unit 145 repeats step S25 and waits for the low-place average temperature L to become the first set temperature α+ Above γ. When the low-place average temperature L becomes equal to or higher than the first set temperature α+γ (step S25: Yes), the anti-frost fan control unit 145 stops sending the operation signal to the generator 15 (step S26). The generator 15 stops when it does not receive the operation signal. The anti-frost fan control unit 145 turns off the electromagnetic switch, stops supplying the electric power of the generator 15 to the anti-frost fan 11, and stops the operation of the anti-frost fan 11 (step S27). If the power of the control device 14 is not turned off (step S28: No), return to step S21, and repeat steps S21 to S28. When the power is turned off (step S28: Yes), the process ends.

In step S25: No, the anti-frost fan control unit 145 may also determine whether the power generation establishment signal from the generator 15 has not been received, or whether the generator 15 has received a power generation abnormal signal indicating that the power generation is stopped, and has not received the power generation confirmation signal from the generator 15 When the power generation establishment signal of the generator 15 or the power generation abnormality signal is received from the generator 15, the process moves to step S26.

According to the anti-frost device 1-1 of the first embodiment, the anti-frost fan can be used even in places where it is difficult to secure an external power source. In addition, an anti-frost device is provided. The anti-frost device determines the first set temperature based on the growth limit temperature corresponding to the current growth stage of the crop A, so as to cope with the change of the growth stage of the crop accompanying the change of the natural environment.

(Embodiment 2)

In the second embodiment, the anti-frost device 1-2 has a temperature difference operation function. The so-called temperature difference operation function refers to the function of operating the anti-frost fan 11 only when it is inferred that the temperature inversion layer X is generated.

Fig. 8 is a schematic diagram showing the structure of the anti-frost device 1-2 in the second embodiment of the present invention. The anti-frost device 1-2 of the second embodiment is an additional temperature sensor 13 installed on the upper part of the column 100 to the anti-frost device 1-2 of the first embodiment.

The temperature sensor 13 detects the air temperature at the height where the temperature inversion layer X is generated. The temperature sensor 13 calculates the average value of the measured value of the temperature at which the height of the temperature inversion layer X is generated for one day. Hereinafter, the average value of the measured values of the temperature sensor 13 for one day is referred to as the average high temperature. The temperature sensor 13 transmits the average temperature at the height as a detection value to the control device 14. Furthermore, the temperature sensor 13 can also send the measured value to the control device 14, and the control device 14 performs the processing of calculating the average value for one day. The temperature sensor 13 is, for example, installed at a position that is not affected by the wind of the anti-frost fan 11 and/or natural wind. The temperature sensor 13 is an example of the second sensor of the present invention.

The control device 14 has a temperature difference operation function. Generally, the air temperature decreases as the altitude rises, so the average temperature at high places is less than the average temperature at low places. Therefore, when the average temperature at the high place>the average temperature at the low place, between the average temperature at the high place and the average temperature at the low place, there is a difference opposite to the usual temperature difference accompanied by the altitude difference, so it can be inferred from the temperature sensing An inversion layer X is formed around the height of the device 13. Therefore, the control device 14 determines that an inversion layer X effective for anti-frost is generated when the average low temperature <the first set temperature and the average high temperature-the average low temperature> the second set temperature, and starts the engine The motor 15 starts the operation of the anti-frost fan 11. The second set temperature is set to a predetermined temperature. The control device 14 judges that no inversion has occurred when the detected value of the average high temperature-the average low temperature ≦ the second set temperature-η, or the average low temperature ≧ the first set temperature + γ Layer X or is invalid for anti-frost, and stop the generator 15 and stop Stop the operation of the anti-frost fan 11. Wherein, the control device 14 operates the anti-frost fan 11 even when the detected value of the high-place average temperature-the low-place average temperature ≤ the second set temperature, when the low-place average temperature <the growth limit temperature. The other structure is the same as that of the first embodiment.

The functional configuration of the control device 14 of the second embodiment will be described with reference to Fig. 9. The functional configuration of the control device 14 of the second embodiment is the same as that of the control device 14 of the first embodiment.

The detection signal receiving unit 143 not only receives the signal representing the detection value (average temperature at the lower part) from the temperature sensor 12, but also receives the signal representing the detection value (average temperature at the upper part) from the temperature sensor 13. The detection signal receiving unit 143 stores the low-place average temperature information representing the low-place average temperature and the high-place average temperature information representing the high-place average temperature in the storage unit 142 of the control device 14.

When the anti-frost fan control section 145 stores the low-place average temperature information and high-place average temperature information in the storage section 142, the low-place average temperature is lower than the first set temperature and is calculated by subtracting the low-place average temperature from the high-place average temperature. When the obtained value is greater than the second set temperature, an operation signal is sent to the generator 15. The generator 15 that has received the operation signal is started, and when it is in a state where the power can be stably supplied, a power generation establishment signal is sent to the control device 14. When receiving the power generation establishment signal from the generator 15, the anti-frost fan control unit 145 turns on the electromagnetic switch to supply the electric power of the generator 15 to the anti-frost fan 11 and start the operation of the anti-frost fan 11.

Anti-frost fan control unit 145 when the average low temperature becomes the first set temperature + γ or more, or when the value obtained by subtracting the average low temperature from the average high temperature becomes the second set temperature -η or less , Stop to the generator 15 Send the operation signal. η is any value above 0. The generator 15 stops when it does not receive the operation signal. The anti-frost fan control unit 145 turns off the electromagnetic switch, stops supplying the electric power of the generator 15 to the anti-frost fan 11, and stops the operation of the anti-frost fan 11. The other functions are the same as in the first embodiment.

Here, the generator control process executed by the control device 14 will be described using Fig. 10. The generator control process shown in FIG. 10 is started by turning on the power from the battery 18 to the control device 14. In Figure 10, the average temperature at the low point is L, the average temperature at the high point is H, the first set temperature is α, and the second set temperature is β. The anti-frost fan control unit 145 of the control device 14 determines whether or not the average low temperature L is lower than the first set temperature α (step S31).

When the low-place average temperature L is equal to or higher than the first set temperature α (step S31: No), the anti-frost fan control unit 145 repeats step S31 and waits for the low-place average temperature L to be lower than the first set temperature α. When the average low temperature L is lower than the first set temperature α (step S31: Yes), the anti-frost fan control unit 145 determines whether the value obtained by subtracting the average low temperature L from the average high temperature H is greater than the first set temperature α. 2 Set temperature β (step S32).

When the value obtained by subtracting the average low temperature L from the average high temperature H is equal to or less than the second set temperature β (step S32: No), the process proceeds to step S40. When the value obtained by subtracting the average low temperature L from the average high temperature H is greater than the second set temperature β (step S32: Yes), the anti-frost fan control unit 145 sends an operation signal to the generator 15 (step S33 ). The generator 15 receives the operation signal and starts it, and when it becomes a state where the power can be stably supplied, it sends a power generation establishment signal to the control device 14. When the power generation establishment signal is not received from the generator 15 (step S34: No), the anti-frost fan control unit 145 Step S34 is repeated, and the power generation establishment signal is received. When the power generation establishment signal is received from the generator 15 (step S34: Yes), the anti-frost fan control unit 145 turns on the electromagnetic switch to supply the electric power of the generator 15 to the anti-frost fan 11 and start anti-frost The operation of the fan 11 (step S35).

When the value obtained by subtracting the average low temperature L from the average high temperature H is greater than the second set temperature β-η (step S36: No), the anti-frost fan control unit 145 determines whether the average low temperature L is It is the first set temperature α+γ or higher (step S37). When the average low temperature L is lower than the first set temperature α+γ (step S37: No), the anti-frost fan control unit 145 repeats steps S36 and S37, and waits for the high average temperature H to subtract the low The value of the average temperature L at the low point becomes the second set temperature β-η or less, or the average temperature L at the low point becomes the first set temperature α+γ or more.

When the value obtained by subtracting the average low temperature L from the average high temperature H becomes the second set temperature β-η or less (step S36: Yes), or the average low temperature L becomes the first set temperature α+ In the case of γ or more (step S37: Yes), the anti-frost fan control unit 145 stops sending the operation signal to the generator 15 (step S38). The generator 15 stops when it does not receive the operation signal. The anti-frost fan control unit 145 stops the supply from the generator 15 to the anti-frost fan 11, and stops the operation of the anti-frost fan 11 (step S39). If the power of the control device 14 is not turned off (step S40: No), return to step S31, and repeat step S31 to step S40. When the power is off (step S40: Yes), the process ends.

In step S37: No, the anti-frost fan control unit 145 may also determine whether the power generation establishment signal from the generator 15 has not been received, or whether the generator 15 has received a power generation abnormal signal indicating that the power generation is stopped, and it has not been received. When the power generation establishment signal from the generator 15 or the power generation abnormal signal is received from the generator 15, the process proceeds to step S38.

According to the anti-frost device 1-2 of the second embodiment, the anti-frost fan can be used even in a place where an external power source cannot be secured. In addition, power saving can be achieved by operating the anti-frost fan only when it is estimated that the temperature inversion layer X is generated.

(Embodiment 3)

In the second embodiment, the anti-frost device 1-3 even when the low-place average temperature is less than the first set temperature, when the high-place average temperature-the detected value of the low-place average temperature ≤ the second set temperature, that is , In the case that the temperature inversion layer X is not generated, the generator 15 will not be started, and the anti-frost fan 11 will not be operated. Wherein, the control device 14 operates the anti-frost fan 11 even when the detected value of the high-place average temperature-the low-place average temperature ≤ the second set temperature, when the low-place average temperature <the growth limit temperature. On the other hand, in the third embodiment, when the average low temperature is less than the first set temperature, and the detection value of the average high temperature-the average low temperature ≤ the second set temperature, the prevention The anti-frost components other than the frost fan 11 operate.

Figure 11 is a schematic diagram of the anti-frost device and the field of Embodiment 3 of the present invention. In addition to the structure of the anti-frost device 1-3, the anti-frost device 1-3 also includes a heater 17 for temperature increase as a heating device for the field. The control device 14 starts the operation of the heater 17 when the average low temperature <the first set temperature and the detected value of the average high temperature-the average low temperature ≤ the second set temperature. The control device 14 stops the operation of the heater 17 when the average low temperature ≧ the first set temperature + γ, or when the average high temperature-the detected value of the average low temperature> the second set temperature + η.

The functional configuration of the control device 14 of the third embodiment will be described with reference to Fig. 12. The configuration of the control device 14 of the third embodiment is the same as that of the control device 14 of the second embodiment.

When the anti-frost fan control unit 145 stores the low-place average temperature information and the high-place average temperature information in the storage unit 142, the low-place average temperature is lower than the first set temperature, and the low-place average temperature is subtracted from the high-place average temperature. When the obtained value is lower than the second set temperature, the power supply of the heater 17 is turned on. The anti-frost fan control unit 145 is greater than the second set temperature + η when the average low temperature is greater than or equal to the first set temperature + γ, or the value obtained by subtracting the average low temperature from the average high temperature is greater than the second set temperature + η. The power supply of the heater 17 is disconnected. The other functions are the same as in the second embodiment.

The power source of the heater 17 may be the generator 15 or the battery 18, or the battery for starting the starter motor included in the generator 15, or the battery included in itself.

Here, the generator heater control process executed by the control device 14 will be described using FIG. 13. The generator heater control process shown in FIG. 13 is started by turning on the power to the control device 14. In Figure 13, let the average low temperature be L, the average high temperature be H, the first set temperature is α, and the second set temperature is β. Step S51 to step S59 are the same as step S31 to step S39 shown in FIG. 10, so the description is omitted.

In step S52, when the value obtained by subtracting the average low temperature L from the average high temperature H is equal to or less than the second set temperature β, the anti-frost fan control unit 145 starts the operation of the heater 17 (step S60 ). The value obtained by subtracting the average low temperature L from the average high temperature H by the anti-frost fan control unit 145 is equal to or less than the second set temperature β+η (step S61: No), and the average low temperature When the degree L is lower than the first set temperature α+γ (step S62: No), repeat steps S61 and S62, and wait for the value obtained by subtracting the average low temperature L from the average high temperature H to be greater than the first 2 The set temperature β+η or the average low temperature L becomes the first set temperature α+γ or more.

When the value obtained by subtracting the average low temperature L from the average high temperature H is greater than the second set temperature β+η (step S61: Yes), or the average low temperature L becomes the first set temperature α+γ In the above case (step S62: Yes), the anti-frost fan control unit 145 stops the operation of the heater 17 (step S63). If the power of the control device 14 is not turned off (step S64: No), return to step S51, and repeat step S51 to step S64. When the power is turned off (step S64: Yes), the process ends.

According to the anti-frost device 1-3 of Embodiment 3, the anti-frost fan can be used even in a place where an external power source cannot be secured. In addition, in the case where the temperature inversion layer X is not produced, the frost damage of the crop A can also be prevented.

In the above embodiment, the first set temperature is determined based on the growth limit temperature corresponding to the growth stage of the crop A in the field, but it is not limited to this. The first set temperature may be determined in accordance with the growth stage of the crop A in the field. For example, the first set temperature corresponding to the "before budding", "sprouting period", "one-leaf period", "two-leaf period", "three-leaf period", and "four-leaf period ~ picking period" of tea trees can be pre-determined as 1 ℃, 2℃, 3℃, 4℃, 5℃, 6℃, etc. In this case, the storage unit 142 of the control device 14 stores first set temperature information instead of the growth limit temperature information. The first set temperature information indicates the first set temperature determined in advance for each growth stage according to the type of crop.

In the above embodiment, the cumulative value is used to determine the growth stage, but it is not limited to this. As long as it is a method that can determine the growth stage of crops based on the leaf surface of crop A or the temperature near the leaf surface, other methods can be used.

In the first embodiment, the anti-frost fan control unit 145 of the control device 14 determines whether to operate the anti-frost fan 11 based on the average value of the measured value of the temperature sensor 12 for one day, that is, the average low temperature. Limited to this. For example, the anti-frost fan control unit 145 may also determine whether to operate the anti-frost fan 11 based on the one-hour average of the measured values of the temperature sensor 12. Thereby, for example, when the temperature drops below the first set temperature only in the early morning time period, the anti-frost fan 11 can be operated efficiently. In Embodiment 2 and Real-time Mode 3, the generator 15 can also be controlled based on the average value of the average temperature of a low place in one hour and the average temperature of the high place in one hour in the same manner.

In the first embodiment described above, the control device 14 continuously sends an operation signal to the generator 15 when the average temperature at the low point is lower than the first set temperature, and stops when the average temperature at the low point becomes higher than the first set temperature + γ The operation signal is sent to the generator 15, but it is not limited to this. The control device 14 may send a single-shot operation signal to the generator 15 when the average low temperature is lower than the first set temperature, and send the generator 15 to the generator 15 when the average low temperature becomes the first set temperature + γ or more. The stop signal is sent single-shot. In this case, the generator 15 is started when the operation signal is received, and stops when the stop signal is received.

The present invention can implement various embodiments and modifications without departing from the broad spirit and scope of the present invention. In addition, the above-mentioned embodiment is an embodiment for explaining the present invention, and does not limit the scope of the present invention. The scope of the present invention is indicated by the scope of the patent application rather than the embodiment. Moreover, various modifications implemented within the scope of the patent application and within the scope of the equivalent invention are deemed to be within the scope of the present invention.

1-1‧‧‧Anti-frost device

11‧‧‧Frost-proof fan

12‧‧‧Temperature sensor

14‧‧‧Control device

15‧‧‧Generator

16‧‧‧Sunlight Panel

18‧‧‧Battery

100‧‧‧Column

A‧‧‧Crops

X‧‧‧Inversion layer

Claims (7)

An anti-frost device comprising: an anti-frost fan installed at the height of the inversion layer in the field and blowing the wind down to the field; a first sensor that detects at least the leaf surface of the crop in the field or the vicinity of the leaf surface The temperature; the second sensor detects the air temperature that generates the height of the aforementioned inversion layer; the generator is the driving source of the aforementioned anti-frost fan; the control device is based on the average of the detected values of the aforementioned first sensor during a specific period Value and the average value of the detected value of the second sensor during a specific period, sending an operation signal for operating the generator; and a battery that supplies power to the control device, and the control device is used as the first sensor When the average value of the detection value during the specific period is lower than the first set temperature, and the average value of the detection value of the second sensor during the specific period is subtracted from the average value of the detection value of the first sensor during the specific period. When the obtained value is greater than the second set temperature, when the operation signal is sent to the generator and the power generation establishment signal is received from the generator, the power of the generator is supplied to the anti-frost fan; when the first When the average value of the detected value during the specific period of the sensor is greater than the value obtained by adding the first value to the first set temperature, or when the average value of the detected value during the specific period of the second sensor minus the first value 1 If the average value of the detected value of the sensor during the specific period is less than or equal to the value obtained by subtracting the second value from the second set temperature, the operation signal is sent to the generator to stop. The anti-frost device according to claim 1, wherein the growth stage of the crops in the field is determined based on the average value of the detection value of the first sensor during a specific period, And determine the first set temperature corresponding to the determined growth stage of the crops in the field. The anti-frost device according to claim 2, wherein the control device determines the first set temperature based on the growth limit temperature, and the growth limit temperature is determined based on the average value of the detection value of the first sensor during a specific period Corresponds to the growth stages of the crops in the aforementioned fields. The anti-frost device according to claim 2 or 3, wherein the control device calculates the reference temperature and the first sensor when the average value of the detection value of the first sensor in one day exceeds the reference temperature The difference between the average value of the detection value for one day, and the cumulative value of the above-mentioned difference from the calculation start date to the current day, determine the growth stage of the crops in the aforementioned field. The anti-frost device according to any one of claims 1 to 3, which includes a heater for temperature increase in the field, and the average value of the detection value of the control device during the specific period of the first sensor is lower than the first sensor 1 When the temperature is set, and the value obtained by subtracting the detection value of the first sensor from the average value of the detection value of the second sensor during the specified period is below the second set temperature, the heating is started The operation of the device; when the average value of the detection value of the first sensor during the specific period is greater than the value obtained by adding the first set temperature to the first value, or when the detection value of the second sensor during the specific period When the average value of minus the detected value of the first sensor during the specific period is less than or equal to the value obtained by subtracting the second value from the second set temperature, the operation of the heater is stopped. An anti-frost fan control device based on at least the average value of the detection value of the first sensor for detecting the leaf surface of the crop in the field or the temperature near the leaf surface during a specific period and detecting the height of the inversion layer in the field The average value of the detected value of the second sensor of the temperature during a specific period sends an operation signal to the generator to operate the aforementioned generator, The aforementioned generator is a driving source of an anti-frost fan installed at the height of the inversion layer in the aforementioned field and blowing the wind down to the aforementioned field. 1 In the case of setting temperature, and when the average value of the detection value of the second sensor during the specific period minus the average value of the detection value of the first sensor during the specific period, the value is greater than the second set temperature Next, when the aforementioned anti-frost fan control device sends the aforementioned operation signal to the aforementioned generator and receives a power generation establishment signal from the aforementioned generator, it supplies the aforementioned generator’s power to the aforementioned anti-frost fan; when the aforementioned first sensor When the average value of the detected value during the specific period is greater than the value obtained by adding the first value to the first set temperature, or when the average value of the detected value during the specific period of the second sensor minus the first sensor When the average value of the detected value during the specific period of the device is less than or equal to the value obtained by subtracting the second value from the second set temperature. An anti-frost fan control method is an anti-frost fan control method executed by an anti-frost device. The anti-frost device includes: an anti-frost fan installed at the height of the inversion layer in the field and blowing the wind down to the field; 1 sensor, which detects at least the leaf surface of the crops in the field or the temperature near the leaf surface; the second sensor, detects the temperature at the height of the inversion layer; the generator is the anti-frost fan Drive source; control device, based on the average value of the detection value of the first sensor during the specific period and the average value of the detection value of the second sensor during the specific period, to send an operation signal to the generator to operate the generator And a battery, which supplies power to the control device, and the anti-frost fan control method includes: when the average value of the detection value of the first sensor during a specific period is lower than the first set temperature, and when the second When the average value of the detection value of the sensor during the specific period minus the average value of the detection value of the first sensor during the specific period is greater than the second set temperature, the operation signal is sent to the generator step; The step of receiving a power generation establishment signal from the generator; the step of supplying the power of the generator to the anti-frost fan; and when the average value of the detection value of the first sensor during a specific period is greater than the first set temperature plus In the case of the value obtained from the first value, or when the average value of the detection value of the second sensor during the specific period minus the average value of the detection value of the first sensor during the specific period is less than or equal to the second setting If the temperature is obtained by subtracting the second value, it will be sent to the step of stopping the operation signal of the generator.

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