JP2018084537A - Wind measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind measuring device with a simple configuration, capable of accurately measuring the wind speed and wind direction.SOLUTION: A wind measuring device is constituted of a detector 1 which receives the wind: a transmission member 2 for transmitting power of the wind; and a detection sensor 3 for detecting the power of the wind. When air flows in the lateral direction of an X-axis and a Y-axis, and the detector 1 receives the wind in the lateral direction of the X-axis and Y-axis, the detector sensor 3 detects tensile force at that time as power of wind and outputs a positive value since a base end part 2b of the transmission member 2 becomes a state pulled in the positive direction of a Z-axis by deflecting the transmission member 2 using a connection part with the detection sensor 3 as a fulcrum.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wind measuring device that detects the magnitude and direction of wind force and measures the wind speed and direction.

  In farm spaces such as living spaces, industrial facilities, and cultivation facilities, “wind speed” is an important environmental factor and also affects productivity. Furthermore, information on the “wind direction” indicating from which direction the wind is blowing is important in understanding the environment. For example, in a living space, it is better to be able to grasp the flow direction of harmful substances such as cigarette smoke. Even in industrial facilities, it is necessary to pay attention to the wind direction of clean rooms. Furthermore, in data centers and server rooms that play a central role in ICT and cloud computing, if the airflow management is not performed properly, the server will not be cooled properly, and processing speed will be limited. I will receive it.

  Also, unlike the outdoor environment, the wind speed in these spaces is often 1 m / s or less, and the installation location is limited, so the wind measuring device needs to be small. In addition, there is a strong demand for downsizing and cost reduction of sensors even outdoors, and a wind measuring device that satisfies these needs is demanded.

  By the way, conventionally, various methods have been proposed as wind measuring devices for measuring wind speed and direction. For example, as what is generally used in outdoor weather measurement, what is called a weathercock is known in which a blade comes to the leeward side by the force of the wind. In particular, the Japan Meteorological Agency and outdoor weather measurement use what is called an airplane type equipped with a wind speed detection propeller.

  Also, an ultrasonic method for obtaining the wind speed and direction from the transmission speed of ultrasonic waves has been put into practical use. This is a method of obtaining wind directions by simultaneously measuring wind speeds in a plurality of directions and deriving vectors from the plurality of wind speeds. The wind direction calculation requires at least two-axis ultrasonic oscillators and receivers. If three sets of these are used and measured in three axes, a three-dimensional wind direction can also be obtained.

  In addition, a method of obtaining a three-dimensional wind direction by combining three directions of propeller type anemometers is also used.

  However, these conventional wind measuring devices are large in size and require a space of 20 cm square or more, and the cost of the device is high. In addition, since the wind measuring devices other than the ultrasonic type utilize the fact that a force proportional to the cube of the wind speed is applied to the object, it is difficult to measure in a slight wind speed region or a difference due to a difference in wind speed is difficult to occur. On the other hand, when the design was optimized for the low wind speed range, it was over range when placed in a slightly strong wind speed environment. On the other hand, only the ultrasonic type can detect fine wind speeds of 1 m / s or less well, but the ultrasonic type also increases the operating frequency or the oscillator to reception to increase the resolution. It was necessary to increase the distance between the vessels.

Therefore, apart from the above-described method, a thermal wind measuring device has been put into practical use. This method is easy to downsize, has a relatively simple structure, and is characterized by the ability to measure fine wind speeds. As a practical example, three Pt self-heating type wind speed sensors with directivity are combined, and a method of calculating the wind direction using the difference in sensitivity due to directivity is taken and is also commercially available. . However, since this method uses three thin platinum resistors, it has a problem that the mechanical shock and corrosion resistance are low in weather resistance, and manufacturing is also required.
Accordingly, the present inventors have invented and applied for a patent as a structure and manufacturing method of a wind measuring device that overcomes these problems and has high cost, size reduction, and robustness. ing.

Japanese Patent Laying-Open No. 2015-68659 JP2015-210196A Japanese Patent Laid-Open No. 2006-118511

  However, as a problem of the thermal type in the first place, it is necessary to warm the detection portion, and as a result, there is a problem that it does not operate unless a constant thermal energy source is supplied to the sensor. As a result, when a battery is used as a power source, continuous operation cannot be performed for a long time, and in order to perform continuous operation, it is necessary to prepare a power source such as a commercial power source as an energy source so that electricity can be stably received for a long time. There is. This problem places restrictions on the installation and operation of the apparatus, and restricts the implementation of IoT and the smart community using sensors and the like that are expected in the future.

  In addition to the above-mentioned methods, Pitot tubes used in aircraft, differential pressure type flow meters for pipes and other fluids have been put into practical use. This is for a fluid whose flow path is already known, and is not suitable for measurements where the flow direction is not fixed or the flow direction cannot be predicted.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a wind measuring device that can measure a wind speed and a wind direction with a simple configuration with high accuracy.

  In order to achieve the above object, a wind measuring device according to the present invention is provided with a detector that receives wind, a transmission member that supports the detector and that transmits wind force received by the detector, and is transmitted by the transmission member. And a detection sensor for detecting the magnitude of the wind force.

  According to this, it is possible to easily and reliably detect the magnitude of wind force with a simple configuration including a detector, a transmission member, and a detection sensor, and to accurately measure wind speed and direction. Become.

  The detector may be formed in a sphere. According to this, since there is no directivity with respect to the wind from all directions up, down, left and right, the magnitude of the wind force from all directions can be detected.

  Moreover, the said detector may be formed in the aspect with which several thin rod-shaped members are extended radially. According to this, when the detector receives a strong wind, it is possible to prevent an excessive force from being applied to the transmission member and the detection sensor by the wind passing between the rod-shaped members.

  The transmission member may be a rod-shaped member extending in the axial direction, the detector may be provided at the distal end, the detection sensor may be provided at the proximal end, and the detection sensor may transmit the transmission member. You may arrange | position to the surrounding surface side of the base end part of a member. According to this, the magnitude of the wind force can be easily and reliably detected with a simpler configuration.

  The transmission member may include a rod-like member extending in the axial direction and a plurality of leg members provided at a base end portion of the rod-like member, and a detection sensor may be provided at the base end portion of each leg member. . According to this, the direction of the wind can be measured by synthesizing the detection result of the magnitude of the wind force by each detection sensor provided at the base end portion of each leg member.

  Further, the transmission member includes a rod-shaped member extending in the axial direction and a flat plate member provided at a base end portion of the rod-shaped member, and a plurality of detection sensors may be provided on the back surface of the flat plate member. The transmission member may be a flat plate member extending in the plane direction, and the detector may be provided on the front surface, and the plurality of detection sensors may be provided on the back surface. According to this, the direction of the wind can be measured by combining the detection results of the magnitude of the wind force by the respective detection sensors provided on the back surface of the flat plate member.

  The rod-shaped member may be made of a flexible material. According to this, since the force transmitted to the detection sensor can be attenuated by bending according to the wind force received by the detector, it can be applied in a wide wind speed range from a weak wind speed environment to a strong wind speed environment.

  Furthermore, a measurement unit that measures the wind speed and / or the wind direction based on the magnitude of the wind force detected by the detection sensor may be provided. Accordingly, it is possible to accurately measure the wind speed and / or the wind direction based on the magnitude of the wind force detected by the detection sensor.

  According to the present invention, it is possible to easily and reliably detect the magnitude of wind force with a simple configuration including a detector, a transmission member, and a detection sensor, and to accurately measure wind speed, wind direction, and the like. It becomes.

  For this reason, it is possible to provide a small and inexpensive wind measuring device for scenes that require wind speed and direction in agricultural spaces such as living spaces, industrial facilities, and cultivation facilities.

  Also, detection devices such as piezo elements that detect pressure and force are energy-saving such as chemical batteries and energy-harvesting such as solar cells and vibration power generation for power saving that does not require large power. The device can operate in a power supply environment where energy is completed within the device.

It is a perspective view of the wind measuring device concerning a 1st embodiment. It is a perspective view of the wind measuring device which concerns on 2nd Embodiment. It is the (a) sectional side view of the base end part of the wind measuring device of FIG. 2, and (b) plane sectional drawing. It is a perspective view of the wind measuring device which concerns on 3rd Embodiment. It is a schematic diagram which shows the detection state of the wind force by the detection sensor in the wind measuring device of FIG. It is the (a) perspective view of the wind measuring device which concerns on 4th Embodiment, (b) It is a bottom view. It is a perspective view which shows the modification of the wind measuring device which concerns on 4th Embodiment. It is a perspective view of the wind measuring device which concerns on 5th Embodiment. It is a block diagram which shows the electrical structure of a wind measuring device.

<First Embodiment>
Next, a first embodiment of a wind measuring device (hereinafter referred to as this device) according to the present invention will be described with reference to FIG.

  This apparatus includes a detector 1 that receives wind, a transmission member 2 that transmits wind force, and a detection sensor 3 that detects wind force.

  The detector 1 is formed in a sphere, and has a shape having no directivity with respect to wind from all directions. For this reason, when the detector 1 receives wind from a certain direction, the detector 1 receives wind force while flowing the wind along the surface of the sphere.

  The transmission member 2 is made of a rod-like member made of a flexible resin or metal extending in the axial direction. The detector 1 is provided at the distal end portion 2a, and the detection sensor 3 is provided at the proximal end portion 2b. . The transmission member 2 transmits the wind force received by the detector 1 to the detection sensor 3. Specifically, when the detector 1 receives wind, the transmission member 2 bends with the connection portion with the detection sensor 3 as a fulcrum, so that the base end 2b of the transmission member 2 is pulled in the Z-axis direction, A force to be pressed acts, and the tensile force and pressing force are transmitted to the detection sensor 3 as wind force.

  The detection sensor 3 is formed in a flat plate having a rectangular shape in plan view. The transmission member 2 is erected at the center of the front surface, and the back surface is fixed to a fixed object such as a housing. The detection sensor 3 includes a conversion element such as a piezo element for detecting the magnitude of the wind force transmitted from the transmission member 2 and converting the magnitude of the wind force into an electric signal. In the present embodiment, the detection sensor 3 outputs a positive value when the base end 2b of the transmission member 2 is pulled in the positive direction of the Z axis, and negative when the transmission member 2 is pushed in the negative direction of the Z axis. Output the value.

  Thus, when the wind flows in the lateral direction of the X-axis and Y-axis and the detector 1 receives the wind in the lateral direction of the X-axis and Y-axis, the transmission member 2 bends with the connection portion with the detection sensor 3 as a fulcrum. As a result, the base end portion 2b of the transmission member 2 is pulled in the positive direction of the Z-axis, so that the detection sensor 3 detects the tensile force at that time as a wind force and outputs a positive value.

<Second Embodiment>
Next, a second embodiment of the apparatus according to the present invention will be described with reference to FIGS. In the following, only the configuration different from the above embodiment will be described, and the description of the same configuration will be omitted and the same reference numeral will be given.

  In the present embodiment, the transmission member 2 has a base end 2b directly fixed to a solid object G such as a housing. For this reason, when the detector 1 receives wind, the transmission member 2 bends with the connection portion with the solid object G as a fulcrum, so that the base end 2b of the transmission member 2 is pushed in the X-axis direction or the Y-axis direction. A force acts, and the pressing force is transmitted to the detection sensor 3 as a wind force.

  The detection sensor 3 includes two first and second detection sensors 3A and 3B formed in a rectangular parallelepiped. The first and second detection sensors 3A and 3B are provided via connecting members 41 and 42 in the X-axis direction and the Y-axis direction on the peripheral surface side of the base end 2b of the transmission member 2, respectively. The first and second detection sensors 3A and 3B detect the magnitude of the wind force transmitted from the transmission member 2, and convert the magnitude of the wind force into an electric signal. It consists of conversion elements. In the present embodiment, the first detection sensor 3A outputs a positive value when pulled in the positive direction of the X axis via the connecting member 41 by the base end 2b of the transmission member 2, and in the negative direction of the X axis. Outputs a negative value when pressed. On the other hand, when the second detection sensor 3B is pushed in the positive direction of the Y axis by the base end 2b of the transmission member 2 via the connecting member 42, the second detection sensor 3B outputs a positive value and is pulled in the negative direction of the X axis. Output a negative value.

  Thus, when the wind flows in the lateral direction of the X-axis and Y-axis and the detector 1 receives the wind in the lateral direction of the X-axis and Y-axis, the transmission member 2 bends with the connection portion with the fixed object G as a fulcrum. As a result, the base end 2b of the transmission member 2 is pushed in the X-axis and Y-axis directions via the connection members 41 and 42, and the first and second detection sensors 3A and 3B are pushed accordingly. The first and second detection sensors 3A and 3B detect the pressing force and the tensile force at that time as wind force and output a positive value or a negative value. At this time, since the first detection sensor 3A detects the wind force in the X-axis direction and the second detection sensor 3B detects the wind force in the Y-axis direction, the first detection sensor 3A detects the wind force in the X-axis direction. The total wind force and direction (the direction of the two-dimensional plane in the X axis-Y axis direction) is measured by combining the wind force in the Y axis direction by the second detection sensor 3B. Can do.

  In the present embodiment, the first detection sensor 3A and the second detection sensor 3B are provided separately. However, the first detection sensor 3A and the second detection sensor 3B are integrated into one, Two wind forces may be converted into electrical signals.

<Third Embodiment>
Next, a third embodiment of the apparatus according to the present invention will be described with reference to FIGS.

  In the present embodiment, the transmission member 2 includes a first transmission member 21 made of a rod-shaped member made of a flexible resin or metal extending in the axial direction, and a proximal end portion of the first transmission member 21. It is comprised from the 2nd transmission member 22 which consists of provided leg members, such as flexible resin or metal. The second transmission member 22 includes three transmission members 22A, 22B, and 22C, and extends obliquely downward from the base end portion of the first transmission member 21 at an angle of 120 degrees in plan view. The detection sensor 3 (3A, 3B, 3C) is provided at the base end 2b. For this reason, when the detector 1 receives wind, the transmission member 2 bends with the connection portion with the detection sensor 3 as a fulcrum, so that the base end portion 2b of the second transmission member 22 is pulled in the Z-axis direction. Then, a pressing force is applied, and the tensile force and pressing force are transmitted to the detection sensor 3 as wind force.

  The detection sensor 3 includes first to third detection sensors 3A, 3B, 3C formed on a flat plate having a rectangular shape in plan view, and a second transmission member 22 (22A, 22B, 22C) is provided at the center of the surface. The back surface is fixed to a fixed object such as a housing. The detection sensor 3 (3A, 3B, 3C) detects the magnitude of the wind force transmitted from the transmission member 2, and converts the magnitude of the wind force into an electrical signal. The conversion element. In the present embodiment, the detection sensor 3 (3A, 3B, 3C) outputs a positive value when the base end 2b of the second transmission member 22 (22A, 22B, 22C) is pulled in the positive direction of the Z-axis. When the base end portion 2b of the second transmission member 22 (22A, 22B, 22C) is pushed in the negative direction of the Z axis, a negative value is output.

  Thus, when the wind flows in a predetermined direction and the detector 1 receives the wind in the predetermined direction, the proximal end portion 2b of the second transmission member 22 (22A, 22B, 22C) is pulled in the positive direction of the Z-axis. Detection sensor 3 (3A, 3B, 3C) detects the pulling force or pressing force at that time as a wind force and detects a positive value or a negative value. Output each. Further, by combining the wind force in the Z-axis direction of these detection sensors 3 (3A, 3B, 3C), the overall wind force and direction (three-dimensional direction in the X-axis-Y-axis-Z-axis direction) can be obtained. It can be measured.

  For example, as shown in FIG. 5A, when the wind flows in the positive direction of the Y axis and the detector 1 receives the wind in the positive direction of the Y axis, the base end portion 2b of the second transmission member 22C becomes the Z axis. Therefore, the detection sensor 3C detects the pressing force at that time as a wind force and outputs a negative value. On the other hand, since the base end portions 2b of the second transmission members 22A and 22B are pulled in the positive direction of the Z-axis, the detection sensors 3A and 3B detect the tensile force at that time as the wind force and The value of is output. By combining the wind force in the Z-axis direction by these detection sensors 3 (3A, 3B, 3C), the total wind force and direction (positive direction of the Y-axis) can be measured.

  Further, for example, as shown in FIG. 5B, when the wind flows in the negative direction of the Y axis and the detector 1 receives the wind in the negative direction of the Y axis, the base end portions of the second transmission members 22A and 22B Since 2b is pushed in the negative direction of the Z-axis, the detection sensors 3A and 3B detect the pressing force at that time as a wind force and output a negative value. On the other hand, since the base end 2b of the second transmission member 22C is pulled in the positive direction of the Z-axis, the detection sensor 3C detects the tensile force at that time as a wind force and outputs a positive value. To do. By combining the wind force in the Z-axis direction by these detection sensors 3 (3A, 3B, 3C), the overall wind force and direction (the negative direction of the Y-axis) can be measured.

  For example, as shown in FIG. 5C, when the wind flows in the positive direction of the X axis and the detector 1 receives the wind in the positive direction of the X axis, the base end portion 2b of the second transmission member 22B is Since the Z-axis is pressed in the negative direction, the second detection sensor 3B detects the pressing force at that time as a wind force and outputs a negative value. On the other hand, since the base end portion 2b of the second transmission member 22A is pulled in the positive direction of the Z-axis, the detection sensor 3A detects the tensile force at that time as a wind force and outputs a positive value. To do. Since the base end portion 2b of the second transmission member 22C is neither pushed nor pulled, the detection sensor 3C outputs a neutral value (± 0). By combining the wind force in the Z-axis direction by these detection sensors 3 (3A, 3B, 3C), the entire wind force and direction (the positive direction of the X-axis) can be measured.

  Further, for example, as shown in FIG. 5D, when the wind flows in the negative direction of the Z axis and the detector 1 receives the wind in the negative direction of the Z axis, each of the second transmission members 22A, 22B, and 22C Since the base end 2b is pushed in the negative direction of the Z-axis, the detection sensors 3A, 3B, and 3C detect the pressing force at that time as wind force and output the same negative value. . By combining the wind force in the Z-axis direction by these detection sensors 3 (3A, 3B, 3C), the entire wind force and direction (negative direction of the Z-axis) can be measured.

  Further, for example, as shown in FIG. 5E, when the wind flows in the positive direction of the Z axis and the detector 1 receives the wind in the positive direction of the Z axis, each of the second transmission members 22A, 22B, and 22C Since the base end 2b is pulled in the positive direction of the Z-axis, the detection sensors 3A, 3B, and 3C detect the tensile force at that time as wind force and output the same positive value. . By combining the wind force in the Z-axis direction by these detection sensors 3 (3A, 3B, 3C), the entire wind force and direction (the positive direction of the Z-axis) can be measured.

<Fourth Embodiment>
Next, a fourth embodiment of the apparatus according to the present invention will be described with reference to FIG.

  In the present embodiment, the transmission member 2 includes a first transmission member 21 made of a rod-like member extending in the axial direction, and a second transmission made of a flat plate member provided at the base end of the first transmission member 21. And a member 22. As for this 2nd transmission member 22, the 1st transmission member 21 is standingly arranged from the center part of the surface, and the detection sensor 3 is provided in the back surface. For this reason, when the detector 1 receives wind, the first transmission member 21 bends with the connection portion with the second transmission member 22 as a fulcrum, so that each part on the plane of the second transmission member 22 becomes Z. A force that is pulled or pushed in the axial direction is applied, and the tensile force or the pressing force is transmitted to the detection sensor 3 as a wind force.

  As shown in FIG. 6B, the detection sensor 3 includes three detection sensors 3 </ b> A, 3 </ b> B, and 3 </ b> C that are formed in a disk shape, each along the periphery of the back surface of the second transmission member 22. The second transmission members 22 are disposed at an angle of 120 degrees as viewed from the central portion. These detection sensors 3 (3A, 3B, 3C) detect the magnitude of the wind force transmitted from the transmission member 2, and convert the magnitude of the wind force into an electrical signal. The conversion element. In the present embodiment, the detection sensor 3 (3A, 3B, 3C) outputs a positive value when the proximal end portion 2b of the second transmission member 22 is pulled in the positive direction of the Z axis, and the second transmission member When the base end 2b of 22 is pushed in the negative direction of the Z axis, a negative value is output.

  Thus, as in the third embodiment, when the wind flows in a predetermined direction and the detector 1 receives the wind in the predetermined direction, each part of the second transmission member 22 is in the positive or negative direction of the Z axis. The sensor 3 (3A, 3B, 3C) detects the pressing force or tensile force at that time as a wind force and outputs a negative value or a positive value. To do. Further, by combining the wind force in the Z-axis direction by these detection sensors 3 (3A, 3B, 3C), the overall wind force and direction (three-dimensional direction in the X-axis-Y-axis-Z-axis direction) can be obtained. It can be measured.

  In the present embodiment, the transmission member 2 is composed of the first transmission member 21 made of a rod-shaped member and the second transmission member 22 made of a flat plate member. However, as shown in FIG. It may consist of only.

<Fifth Embodiment>
Next, a fifth embodiment of the apparatus according to the present invention will be described with reference to FIG.

  In the present embodiment, the detector 1 is formed in such a manner that a plurality of elongated rod-shaped members 11 extend radially upward in the positive direction of the Z axis. According to this, when the detector 1 receives a strong wind, it is possible to prevent an excessive force from being applied to the transmission member 2 and the detection sensor 3 by the wind passing between the rod-shaped members 11.

  In the present embodiment, the rod-shaped member 11 includes not only a rigid material having a certain diameter but also a material made of hair.

  In each of the above embodiments, as shown in FIG. 9, a measurement unit that measures the wind speed and / or the wind direction based on the magnitude of the wind force detected by the detection sensor 3 may be provided. Further, the measurement unit may measure the wind speed and the wind direction based on the amplitude and amplitude cycle of the magnitude of the wind force by the detection sensor 3.

  The detector 1 is a sphere or a radial one, but may have other shapes.

  Moreover, although the said transmission member 2 shall consist of a rod-shaped member, a flat plate member, or those combinations, it may be another shape.

  Moreover, although the said transmission member 2 shall consist of a flexible member, the member which does not bend may be sufficient. However, when the transmission member 2 is made of a flexible member, the force transmitted to the detection sensor 3 can be attenuated by bending according to the wind force received by the detector. It can be applied in a wide range of wind speeds.

  Moreover, although the said detection sensor 3 shall use 1-3 detection sensors 3, you may use four or more detection sensors 3. FIG. When three detection sensors 3 (3A, 3B, 3C) are used, each detection sensor 3 (3A, 3B, 3C) is arranged at an angle of 120 degrees from the center. It may be an arrangement. However, when the three detection sensors 3 (3A, 3B, 3C) are provided, the magnitude and direction of the wind can be accurately measured by arranging them so as not to be aligned.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 1 ... Detector 2 ... Transmission member 3 ... Detection sensor

Claims (10)

A detector that receives the wind,
A transmission member that supports the detector and transmits the force of the wind received by the detector;
A wind measurement device comprising: a detection sensor that detects the magnitude of wind force transmitted by the transmission member.   The wind detector according to claim 1, wherein the detector is formed in a sphere.   The wind detector according to claim 1, wherein the detector is formed in a form in which a plurality of thin rod-shaped members extend radially.   4. The wind according to claim 1, wherein the transmission member includes a rod-shaped member extending in an axial direction, the detector is provided at a distal end portion, and the detection sensor is provided at a proximal end portion. Measuring device.   The wind measuring device according to claim 4, wherein the transmission member has a detection sensor disposed on a peripheral surface side of a proximal end portion of the transmission member.   The said transmission member consists of the rod-shaped member extended in an axial direction, and the some leg member provided in the base end part of this bar-shaped member, and the detection sensor is provided in the base end part of each leg member. The wind measuring device according to claim 3.   The said transmission member consists of the rod-shaped member extended in an axial direction, and the flat plate member provided in the base end part of this rod-shaped member, The several detection sensor is provided in the back surface of the flat plate member. The wind measuring device according to any one of 3 above.   The wind measuring device according to any one of claims 4 to 7, wherein the rod-shaped member is made of a flexible material.   The wind measurement according to any one of claims 1 to 3, wherein the transmission member is made of a flat plate member extending in a plane direction, the detector is provided on the front surface, and the plurality of detection sensors are provided on the rear surface. apparatus.   The wind measuring device according to any one of claims 1 to 9, further comprising a measuring unit that measures a wind speed and / or a wind direction based on a magnitude of a wind force detected by the detection sensor.