Sensible temperature regulation system, sensible temperature regulation method and program

Abstract

To provide a sensible temperature regulation system, sensible temperature regulation method and program capable of protecting livestock animals from heat stress.SOLUTION: A sensible temperature regulation system 200 includes a temperature and humidity sensor 201, a blower 2 and a control circuit 210. The temperature and humidity sensor 201 measures a temperature and humidity of facilities where animals are kept to acquire temperature and humidity data. The blower 2 blows air toward the animals and can change a wind direction and a rotation speed of blowing the air. The control circuit 210 calculates a sensible temperature of the animals from the temperature and humidity data acquired by the temperature and humidity sensor 201, and when the calculated sensible temperature is higher than a reference value, changes the wind direction and the rotation speed of the blower 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a perceived temperature control system, a perceived temperature control method, and a program.

Background Art

[0002] Patent Document 1 describes a livestock blower that is attached in a cantilever manner to a column, beam, or support of a building, is rotatable in the horizontal direction and adjustable in the depression angle, and is capable of blowing air in all directions of the building or only in one direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Livestock animals are known to be stressed when the perceived temperature is high, and it is desirable to maintain a perceived temperature that does not cause stress. According to the technique described in Patent Document 1, it is possible to lower the perceived temperature of livestock by blowing air into a livestock building, but there is a problem that it is not possible to blow air according to the perceived temperature of livestock animals, and it is not possible to appropriately adjust the perceived temperature of livestock animals.

[0005] In view of such problems, the present invention has been made, and an object thereof is to provide a perceived temperature control system, a perceived temperature control method, and a program capable of protecting livestock animals from heat stress.

Means for Solving the Problems

[0006] To achieve the above object, the perceived temperature control system according to the present invention includes a temperature and humidity sensor that measures the temperature and humidity of a facility for raising animals and acquires temperature and humidity data, It is provided with a blower capable of blowing air to the animal and changing the blowing direction and rotation speed of the blown air. A control circuit that calculates the perceived temperature of the animal from the temperature and humidity data acquired by the temperature and humidity sensor, and changes the blowing direction and rotation speed of the blower when the calculated perceived temperature is higher than a reference value. It is characterized by this.

[0007] When the perceived temperature is higher than the reference value, the control circuit may calculate the rotation speed of the blower that makes the perceived temperature equal to or lower than the reference value, and operate the blower at the calculated rotation speed.

[0008] The blower may include a rotation mechanism that changes the blowing direction of the blower by rotational driving.

[0009] The rotation mechanism may be rotationally driven about a first axis parallel to the vertical direction and a second axis perpendicular to the first axis.

[0010] When the perceived temperature is higher than the reference value, the control circuit calculates the driving amount of the rotation mechanism that directs the blowing direction of the blower toward the animal. The rotation mechanism may be driven by the driving amount calculated by the control circuit to direct the blowing direction of the blower toward the animal.

[0011] When the perceived temperature is equal to or lower than the reference value, the control circuit may change the rotation speed of the blower based on the air temperature in the facility.

[0012] The temperature and humidity sensor may include a psychrometer, and the temperature and humidity data may include the dry-bulb temperature and the wet-bulb temperature.

[0013] The facility may be an open-type cowshed, and the animal may be a cow.

[0014] To achieve the above object, the perceived temperature adjustment method according to the present invention is as follows. Measure the temperature and humidity of the facility where the animal is raised to obtain temperature and humidity data. Calculate the perceived temperature of the animal from the acquired temperature and humidity data, and when the calculated perceived temperature is higher than a reference value, change the wind direction and rotation speed of the blower that blows air to the animal. It is characterized by this.

[0015] To achieve the above object, the program according to the present invention is: To a computer, Measure the temperature and humidity of the facility where the animal is raised to obtain temperature and humidity data, Calculate the perceived temperature of the animal from the acquired temperature and humidity data, and when the calculated perceived temperature is higher than a reference value, change the wind direction and rotation speed of the blower that blows air to the animal. It is characterized by this.

Effect of the Invention

[0016] According to the present invention, it is possible to provide a perceived temperature adjustment system, a perceived temperature adjustment method, and a program that can protect livestock animals from stress caused by heat.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described. The embodiments are a preferred example and are not limited to the description or drawings of the embodiments. Therefore, a structure that changes a part of the configuration within the scope of the gist of the invention, or a structure that can achieve the same features and effects, etc. are within the scope of the present invention.

[0019] FIG. 1 is a block diagram showing the configuration of a perceived temperature control system 200 according to an embodiment. As shown in FIG. 1, the perceived temperature control system 200 includes a temperature and humidity sensor 201, a reading circuit 202, an arithmetic circuit 203, an output circuit 204, a switch 205, a breaker 206, a rotation speed controller 207, and a blower 2 including rotation mechanisms 10 and 11. The reading circuit 202, the arithmetic circuit 203, the output circuit 204, the switch 205, and the breaker 206 constitute a control panel (control circuit) 210.

[0020] The blower 2 is a blower that blows air against the cow A by rotating the blades 5 described later.

[0021] FIG. 2 is a plan view showing the structure of the cowshed 1 in which the perceived temperature control system 200 is arranged. As shown in FIG. 2, the cowshed 1 is a gable-roofed building having left and right gable walls 100 and 101 at both ends in the longitudinal direction (building direction) and front and rear side walls 102 and 103.

[0022] The blower 2 is attached to the beams, columns, ceiling, other members, structures, etc. that make up the cowshed 1, and preferably, it is attached near the cow A.

[0023] The blower 2 is installed at predetermined intervals at a position where it can avoid the vicinity (B) of the cow A and the shade (C) of the cow A and directly send air to the cow A. The arrangement of the blower 2 is an example and is not limited thereto.

[0024] The blower 2 is attached to the member 1a of the cowshed 1 in a cantilever manner, or is suspended and supported by a wire, a fishing rod, etc., and is arranged side by side along the building direction 1b one by one.

[0025] FIG. 3 is a diagram showing the configuration of the blower 2, where (A)-(C) are diagrams showing the state with a depression angle, and (D) is a diagram showing the vertical state without a depression angle. As shown in FIGS. 3(A)-3(D), the blower 2 includes a rectangular first frame body 3, an annular second frame body 4, a motor 6 rotatably supported by the second frame body 4, and blades 5 attached to the motor 6. The blower 2 rotates the blades 5 by rotating the motor 6 to blow air.

[0026] The first frame body 3 is rotatably attached to the cowshed 1 about an axis in the vertical (Y direction) (first axis), and is rotated by a rotation mechanism 10 (horizontal rotation adjustment). The second frame body 4 is rotatably attached to the first frame body 3 about an axis in one of the directions perpendicular to the Y direction (X direction) (second axis), and is rotated by a rotation mechanism 11 (depression angle adjustment). The blower 2 can change the blowing direction by the rotation of the first frame body 3 and the second frame body 4.

[0027] Returning to FIG. 1, the temperature and humidity sensor 201 is a sensor arranged in the cowshed 1 that measures the temperature or humidity in the cowshed 1 to obtain temperature and humidity data. The temperature and humidity sensor 201 may include, but is not limited to, a psychrometer, a thermometer, and a hygrometer.

[0028] The arrangement of the temperature and humidity sensor 201 will be described with reference to FIGS. 2 and 4. FIG. 4 is a plan view showing the cattle enclosure part 1d and the blower 2. As shown in FIG. 4, a horizontal partition 1c including a fence (an example and not limited) is provided horizontally along the building direction 1b, and a plurality of cattle enclosure parts 1d are formed in series. The cattle A is partitioned by the cattle enclosure part 1d, and an air passage space B is formed near the cattle A. One cattle enclosure part 1d houses one cattle A, but a plurality of cattle A may be housed according to the situation of the cowshed or the breeding conditions.

[0029] The temperature and humidity sensor 201 is installed at a location where the movement of air is small and the temperature of the cowshed 1 can be accurately measured, including the location (a) where the air from the blower 2 in FIG. 4 does not hit, the cattle enclosure part 1d (c), or the air passage space B (c'). The locations where the air from the blower 2 in FIG. 2 hits (b), near the window (g), near the cow A (n), the corner of the cowshed 1 (ho), and the locations where moisture tends to accumulate (he) may not be able to accurately measure the temperature or humidity of the cowshed 1. Therefore, it is advisable to avoid installing the temperature and humidity sensor 201.

[0030] Returning to FIG. 1, the reading circuit 202 is a circuit that reads the temperature and humidity values of the cowshed 1 measured by the temperature and humidity sensor 201 and transmits them to the arithmetic circuit 203.

[0031] The arithmetic circuit 203 is a circuit that calculates the perceived temperature of the cow A, the wind speed for lowering the perceived temperature of the cow A, the rotation speed of the blades 5 of the blower 2 for obtaining the wind speed, the blowing direction of the blower 2, and the driving amount of the rotating mechanisms 10 and 11 for directing the blower 2 in the blowing direction.

[0032] The output circuit 204 is a circuit that acquires the signal indicating the rotation speed of the blades 5 of the blower 2 calculated by the arithmetic circuit 203 and the signal indicating the driving amount of the rotating mechanisms 10 and 11, and outputs them to the rotation speed controller 207 and the rotating mechanisms 10 and 11 respectively.

[0033] The rotation speed controller 207 is a circuit that controls the rotation speed of the blower 2 based on the signal indicating the rotation speed of the blades 5 of the blower 2 acquired via the output circuit 204.

[0034] The switch 205 is a switch that turns on and off the circuits of the rotation speed controller 207 and the rotating mechanisms 10 and 11.

[0035] The circuit breaker 206 is a breaker that cuts off the circuit and stops the power supply when an abnormality occurs in the circuit.

[0036] The rotating mechanisms 10 and 11 are driven based on the signal indicating the driving amount acquired via the output circuit 204, and change the pointing direction of the blower 2. The rotating mechanisms 10 and 11 may each include a rotating shaft and a motor.

[0037] Figure 5 is a flowchart showing the perceived temperature adjustment process executed by the perceived temperature adjustment system 200 according to the embodiment. The perceived temperature adjustment process will be described with reference to the flowchart of FIG. 5.

[0038] When the perceived temperature adjustment process is started, the arithmetic circuit 203 outputs, via the output circuit 204, the driving amounts of the rotating mechanisms 10 and 11 that direct the blower 2 in the initial wind direction. The rotating mechanisms 10 and 11 are driven according to the driving amounts to change the direction of the blower 2. At the same time, the arithmetic circuit 203 outputs the initial rotation speed of the blower 2 to the rotation speed controller 207, and the rotation speed controller 207 operates the blower 2 at the initial rotation speed (step S101).

[0039] When the blower 2 is operated at the initial wind direction and the initial rotation speed, the reading circuit 202 reads the temperature and humidity values of the cowshed 1 measured by the temperature and humidity sensor 201 and transmits them to the arithmetic circuit 203. The arithmetic circuit 203 calculates the perceived temperature of cow A from the transmitted temperature and humidity of the cowshed 1 (step S102).

[0040] When the perceived temperature of cow A is calculated, the arithmetic circuit 203 compares the calculated perceived temperature with the perceived temperature reference value and determines whether the perceived temperature is higher than the perceived temperature reference value (step S103).

[0041] If the perceived temperature is less than or equal to the perceived temperature reference value (step S103: NO), the operation is continued without changing the blowing direction and rotation speed of the blower 2 (step S104), and the perceived temperature adjustment process ends.

[0042] If the perceived temperature is higher than the perceived temperature reference value (step S103: YES), the arithmetic circuit 203 calculates the driving amounts of the rotating mechanisms 10 and 11 for directing the blower 2 toward cow A, and outputs the driving amounts to the rotating mechanisms 10 and 11 via the output circuit 204 (step S105).

[0043] When the driving amounts of the rotating mechanisms 10 and 11 are output, the arithmetic circuit 203 calculates the wind speed for lowering the perceived temperature of Cow A and the rotational speed of the blower 2 for obtaining the required wind speed, and outputs the calculated rotational speed to the rotational speed controller 207 via the output circuit 204 (step S106).

[0044] When the rotational speed of the blower 2 is output, the rotating mechanisms 10 and 11 are driven according to the driving amount to change the wind direction of the blower 2, and the rotational speed controller 207 changes the rotational speed of the blower 2 (step S107), and the perceived temperature adjustment process ends.

[0045] An example of the determination of the perceived temperature of Cow A and its adjustment method will be described. The perceived temperature of Cow A is Perceived temperature (°C) = 0.35 × Dry bulb temperature (°C) + 0.65 × Wet bulb temperature (°C) …(1) obtained by.

[0046] The evaluation based on the perceived temperature of Cow A is "safe" when the perceived temperature is 19°C or lower, "caution" when it exceeds 19°C, and "dangerous" when the perceived temperature is 25°C or higher.

[0047] Another example of the evaluation of the perceived temperature of Cow A will be described. Fig. 6 is a diagram showing a quick reference table of the perceived temperature of cows. The upper part is a table regarding the dry bulb temperature and the relative humidity, and the lower part is a table regarding the dry bulb temperature and the difference between the dry bulb temperature and the wet bulb temperature. According to the table in Fig. 6, for example, when the dry bulb temperature is 28°C and the relative humidity is 70%, the perceived temperature of the cow is 25.2°C, and it is judged to be within the "dangerous" region.

[0048] The change amount of the perceived temperature due to the wind speed is Change amount of perceived temperature (°C) = -6 × √Wind speed (m / s) …(2) obtained by. According to Equation (2), if a wind with a wind speed of 1 m / s is applied to Cow A, the perceived temperature will drop by 6°C.

[0049] For example, when the air temperature is 28°C and the relative humidity is 70%, according to Equation (1), the perceived temperature of Cow A is 25.2°C, and the evaluation is within the "dangerous" range. However, if a wind with a speed of 1 m / s is applied, according to Equation (2), the perceived temperature drops by 6°C to 19.6°C. If a wind with a speed of 1.5 m / s is applied, according to Equation (2), the perceived temperature drops by 7.3°C to 17.9°C.

[0050] The wind speed required for the perceived temperature of Cow A to be within the "safe" range of 19°C or lower is considered to be the wind speed necessary to lower the perceived temperature by the difference between the perceived temperature and 19°C (perceived temperature - 19°C). This wind speed is obtained by transforming Equation (2), Required wind speed (m / s) = (perceived temperature T - 19)(°C) 2 / 36 …(3) and is obtained as follows.

[0051] Figure 7 is a diagram showing the distribution of wind speed with respect to the distance from the blower 2. In Figure 7, the diameter of the fan of the blower 2 is 1 m, the power consumption is 300 W, and the rotational speeds of the fan are 720 rpm, 600 rpm, 400 rpm, and 200 rpm. As shown in Figure 7, since the wind speed changes depending on the distance from the blower 2, the rotational speed of the blower 2 required to obtain the wind speed necessary to lower the perceived temperature of Cow A changes according to the distance between the blower 2 and Cow A.

[0052] As an example, when it is desired to lower the perceived temperature of Cow A by 5°C at a position 10 m away from the 1 m 300 W blower 2, according to Equation (3), it is necessary to apply a wind of approximately 0.7 m / s (= 5 2 / 36) to Cow A. For this purpose, from Figure 7, the rotational speed of the blower 2 should be set to approximately 220 rpm.

[0053] In the above example, the reference value of the perceived temperature is 25°C, which is the threshold of the dangerous range. The arithmetic circuit 203 determines the rotational speed of the blower 2 so as to lower the perceived temperature of the cow to 19°C or lower, which is the threshold of the safe range, when the perceived temperature of the cow is 25°C or higher.

[0054] With the above configuration and by executing the perceived temperature adjustment process, the perceived temperature adjustment system 200 according to the embodiment can protect cows from stress caused by heat by performing blowing according to the perceived temperature of the cows.

[0055] When the perceived temperature of the cows exceeds the reference value, the perceived temperature adjustment system 200 according to the embodiment controls the blower 2 to directly blow air on cow A, thereby efficiently lowering the perceived temperature of the cows, protecting cow A from stress caused by heat, and preventing the perceived temperature of the cows from dropping more than necessary.

[0056] (Modification example) The embodiments of the present disclosure are not limited to the above, and modifications are possible. For example, although it has been described as breeding cows in cowshed 1, it is not limited to this. It may be possible to breed any livestock animal including pigs and chickens in any livestock shed including pig sheds and chicken coops, and adjust the perceived temperature of any livestock animal.

[0057] Although the blower 2 has been described as being attached to beams, columns, ceilings, other members, structures, etc., it is not limited to this. It may be attached to any location in cowshed 1 including the floor surface. An auxiliary blower 7 for assisting the blowing of the blower 2 shown in FIG. 2 may be attached to the blower 2.

[0058] Although it has been described that when the perceived temperature of the cows is lower than the perceived temperature reference value, the operation is continued without changing the blowing direction and rotation speed of the blower 2, it is not limited to this. The arithmetic circuit 203 may change the rotation speed of the blower 2 based on the temperature in cowshed 1. For example, when the temperature in cowshed 1 is high, the rotation speed of the blower 2 may be increased, and when the temperature in cowshed 1 is low, the rotation speed of the blower 2 may be decreased for control.

[0059] The control panel 210 may manage a plurality of blowers 2 as a group and manage the wind direction or rotation speed of the blowers 2 for each group. The same applies to the temperature and humidity sensor 201.

[0060] Although the body temperature adjustment system 200 has been described as including the control panel 210, it is not limited thereto. A computer that executes a program may be provided, and the computer may control the blower 2 and execute the body temperature adjustment process.

[0061] The above-described embodiments are preferred examples. Within the scope of the gist of this embodiment, a structure in which a part of the configuration is changed, or a structure that can achieve the same features and effects, etc. are within the scope of the present invention.

Explanation of Reference Numerals

[0062] 1 cowshed, 1a member, 1b building direction, 1c transverse partition, 1d cattle enclosure part (cattle enclosure room), 2 blower, 3 first frame body, 4 second frame body, 5 blades, 6 motor, 7 auxiliary blower, 10 rotation mechanism, 11 rotation mechanism, 100 left gable surface, 101 right gable surface, 102 front side surface, 103 rear side surface, 200 body temperature adjustment system, 201 temperature and humidity sensor, 202 reading circuit, 203 arithmetic circuit, 204 output circuit, 205 switch, 206 circuit breaker, 207 rotation speed controller, 210 control panel (control circuit), A cow, B ventilation space, X horizontal direction, Y vertical (vertical) direction, (a) location where the wind from the blower does not hit, (b) location where the wind hits, (c) near the window, (d) near the cow, (e) corner of the cowshed, (f) location where humidity tends to accumulate, (g) shade of the cow, (h) cattle enclosure part, (h') ventilation space

Claims

1. a temperature and humidity sensor that measures the temperature and humidity of a facility for raising animals to obtain temperature and humidity data; a blower that blows air to the animal and is capable of changing the direction and rotation speed of the air, a control circuit that calculates the sensible temperature of the animal from the temperature and humidity data acquired by the temperature and humidity sensor, and changes the wind direction and rotation speed of the blower when the calculated sensible temperature is higher than a reference value; Temperature control system.

2. When the sensible temperature is higher than the reference value, the control circuit calculates a rotation speed of the blower that makes the sensible temperature equal to or lower than the reference value, and operates the blower at the calculated rotation speed. The thermal comfort control system according to claim 1 .

3. The blower includes a rotation mechanism that changes the wind direction of the blower by rotating it. The sensory temperature regulation system according to claim 1 or 2.

4. The rotation mechanism rotates about a first axis parallel to a vertical direction and a second axis perpendicular to the first axis. The sensory temperature regulation system according to claim 3 .

5. the control circuit calculates a drive amount of the rotation mechanism for directing the airflow direction of the blower toward the animal when the sensible temperature is higher than the reference value; The rotation mechanism is driven by a drive amount calculated by the control circuit to direct the airflow direction of the blower toward the animal. The sensory temperature regulation system according to claim 1 or 2.

6. The control circuit changes the rotation speed of the blower based on the air temperature of the facility when the sensible temperature is equal to or lower than the reference value. The sensory temperature regulation system according to claim 1 or 2.

7. The temperature and humidity sensor includes a wet and dry bulb thermometer, and the temperature and humidity data includes a dry bulb temperature and a wet bulb temperature. The sensory temperature regulation system according to claim 1 or 2.

8. The facility is an open barn and the animals are cows; The sensory temperature regulation system according to claim 1 or 2.

9. Obtaining temperature and humidity data by measuring the temperature and humidity of the facility in which the animals are kept; a sensible temperature of the animal is calculated from the acquired temperature and humidity data, and when the calculated sensible temperature is higher than a reference value, a wind direction and a rotation speed of a blower that blows air to the animal are changed. How to adjust perceived temperature.

10. On the computer, measuring the temperature and humidity of the facility in which the animals are kept to obtain temperature and humidity data; a sensible temperature of the animal is calculated from the acquired temperature and humidity data, and when the calculated sensible temperature is higher than a reference value, a wind direction and a rotation speed of a blower that blows air to the animal are changed. program.

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