JP2017194297A - Wind vane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind vane with which it is possible to simplify a wiring structure.SOLUTION: A wind vane 10 comprises a weathercock 40, a light source 50, a photosensor 60, and an arithmetic unit. The weathercock 40 operates upon receiving an air flow. The light source 50 is displaced on the basis of the actuation of the weathercock 40. The photosensor 60 contactlessly detects the position of the light source 50. The arithmetic unit computes the direction of an air flow that the weathercock 40 is receiving, on the basis of the position of the light source 50 detected by the photosensor 60.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an anemometer capable of detecting a wind direction.

  Conventionally, there is an anemometer described in Patent Document 1. The anemometer described in Patent Literature 1 includes a frame member, a detector, and a wind direction sensor. The frame member is supported by a first bearing provided on the support member so as to be rotatable about a first rotation shaft extending in the first direction. The detector has a detection main body and a blade. The detection main body is disposed inside the frame member. The detection main body is supported by a second bearing provided on the frame member so as to be rotatable with respect to the frame member around a second rotation axis extending in a second direction orthogonal to the first direction. The blade is disposed on one end side in the direction orthogonal to the second rotation axis in the detection body. The blades receive the air flow and rotate the frame member and the detection main body, respectively, and direct the other end of the detection main body in the direction orthogonal to the second rotation axis toward the air flow upstream side. The wind direction sensor is arranged in the detection main body. A wind direction sensor detects a wind direction as a direction which the orthogonal direction other end side with respect to a 2nd rotating shaft faces among detection bodies.

  Moreover, in the anemometer described in Patent Document 1, a wiring that passes through the support member, the first bearing, the first rotating shaft, the frame member, the second bearing, the second rotating shaft, and the detection main body is provided. The detection signal of the wind direction sensor is output to an external PC through this wiring. More specifically, an electrode is provided on the outer surface of the portion of the first rotating shaft that is supported by the first bearing. The first bearing is provided with an electrode at a portion where the electrode of the first rotating shaft slides. When the first rotating shaft rotates, the electrode of the first rotating shaft slides on the electrode of the first bearing, so that electrical connection between them is ensured. The second rotating shaft and the second bearing are also provided with a wiring structure using similar electrodes.

Japanese Unexamined Patent Publication No. 2015-222219

  By the way, in the anemometer of patent document 1, a wiring structure is required for all of the support member, the first bearing, the first rotating shaft, the frame member, the second bearing, the second rotating shaft, and the detection body. This is a factor that complicates the structure of the anemometer.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an anemometer that can simplify a wiring structure.

  In order to solve the above problems, the anemometer (10) includes a wind receiving part (40), a detected part (50, 100), a position detecting part (60, 90), and a calculating part (70). Prepare. The wind receiving part operates by receiving an air flow. The detected part is displaced based on the operation of the wind receiving part. The position detector detects the position of the detected part in a non-contact manner. The calculation unit calculates the direction of the air flow received by the wind receiving unit based on the position of the detected portion detected by the position detection unit.

  According to this configuration, it is not necessary to provide a wiring structure in the wind receiving portion. Therefore, the wiring structure of the anemometer can be simplified.

  In addition, the code | symbol in the bracket | parenthesis as described in the said means and a claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  ADVANTAGE OF THE INVENTION According to this invention, the anemometer which can simplify a wiring structure can be provided.

It is an end view which shows the partial end surface structure of the anemometer of embodiment. It is an enlarged view which expands and shows the structure of the connection part of the spherical body and link mechanism in the anemometer of embodiment. It is a block diagram which shows the electrical structure of the anemometer of embodiment. It is an end view which shows the operation example of the anemometer of embodiment. It is an end view which shows the partial end surface structure of the anemometer of other embodiment. It is a block diagram which shows the electrical structure of the anemometer of other embodiment.

Hereinafter, an embodiment of an anemometer will be described.
As shown in FIG. 1, the anemometer 10 of the present embodiment includes a sphere 20, a link mechanism 30, a weather vane 40, a light source 50, and a photosensor 60.

  The spherical body 20 is formed in a hollow shape. The spherical body 20 is formed with a through hole 21 penetrating from the inner surface to the outer surface. The through hole 21 is formed in a circular shape around the axis m1. A link mechanism 30 is inserted into the through hole 21.

  The link mechanism 30 is configured to change the position of the light source 50 based on a change in the attitude of the weathercock 40. The link mechanism 30 includes a cylindrical member 31, a support column 32, an arm member 33, and wires 34 and 35.

  The cylindrical member 31 is formed in a cylindrical shape around the axis m1. The cylindrical member 31 is inserted into the through hole 21 of the sphere 20. A pair of flange portions 310 and 311 are formed on the outer surface of the central portion of the cylindrical member 31. As shown in FIG. 2, the inner wall of the through hole 21 is fitted between the flange portions 310 and 311. The cylindrical member 31 is supported with respect to the spherical body 20 by this fitting structure. Further, the flange portions 310 and 311 are slidable with respect to the inner wall of the through hole 21. With this sliding structure, the cylindrical member 31 can be displaced relative to the sphere 20 in the rotational direction about the axis m1.

  The support | pillar 32 is a rod-shaped member extended along the axis line m1. The support column 32 is inserted into the cylindrical member 31. As shown in FIG. 2, a pin 320 extending in a direction orthogonal to the axis m <b> 1 is formed on the outer surface of the support column 32. The pin 320 is fitted in a fitting hole 312 formed in the cylindrical member 31. The support column 32 is fixed to the cylindrical member 31 by this fitting structure. The outer diameter of the support column 32 is smaller than the inner diameter of the cylindrical member 31. Therefore, a gap is formed between the outer surface of the support column 32 and the inner surface of the cylindrical member 31.

  As shown in FIG. 1, the distal end portion 321 of the support column 32 extends outward in the radial direction of the sphere 20 from the distal end portion 313 of the cylindrical member 31. A weathercock 40 is connected to the tip 321 of the support column 32. The base end portion 322 of the support column 32 extends toward the radially inner side of the sphere 20 from the base end portion 314 of the cylindrical member 31, and is positioned at a substantially center point of the sphere 20. An arm member 33 is connected to the base end 322 of the support column 32.

  The arm member 33 is a rod-shaped member arranged so as to extend from the base end portion 322 of the support column 32 toward the inner surface of the sphere 20. The base end portion 330 of the arm member 33 is connected to the base end portion 322 of the support column 32 via the shaft 332. The shaft 332 is orthogonal to the axis m1 and extends along the axis m2 passing through the center point of the sphere 20. The arm member 33 is supported by the shaft 332 at the base end portion 322 of the support column 32 so as to be rotatable about the axis m2. A light source 50 is provided at the distal end 331 of the arm member 33.

  The wires 34 and 35 are disposed in a gap formed between the outer surface of the support column 32 and the inner surface of the cylindrical member 31. One end of each of the wires 34 and 35 is connected to the base end 330 of the arm member 33. The other end of each of the wires 34 and 35 is connected to the weathercock 40.

  When the weathercock 40 receives the airflow, the weathercock 40 changes its posture so that the tip 41 faces the upstream side of the airflow direction. The weathercock 40 is connected to the tip 321 of the support column 32 via the shaft 42. The shaft 42 extends along an axis m3 orthogonal to the axis m1 and parallel to the axis m2. The weathercock 40 is supported by the shaft 42 so as to be rotatable about the axis m <b> 3 at the tip 321 of the support column 32. In this embodiment, the weathercock 40 is equivalent to the wind receiving part which operate | moves by receiving an airflow.

  The light source 50 is provided at the tip 331 of the arm member 33. The light source 50 emits light toward the inner surface of the sphere 20. In the present embodiment, the light source 50 corresponds to a detected portion that is displaced based on the operation of the weathercock 40.

  A plurality of photosensors 60 are provided distributed over the entire inner surface of the sphere 20. More specifically, a plurality of photosensors 60 are provided on the inner surface of the sphere 20 so as to be distributed radially from the center point of the sphere 20. The photosensor 60 optically detects light emitted from the light source 50 and outputs a signal. Therefore, as shown in FIG. 1, when the light source 50 faces one photosensor 61 of the plurality of photosensors 60, a signal of a predetermined value or more is output from the photosensor 61. In the present embodiment, the photosensor 60 corresponds to a position detection unit that detects the position of the light source 50 in a non-contact manner.

Next, the electrical configuration of the anemometer 10 will be described.
As shown in FIG. 3, the calculation unit 70 is configured mainly with a microcomputer having a CPU 71, a memory 72, and the like. The calculation unit 70 captures the output signals of the plurality of photosensors 60. The calculation unit 70 executes a processing program stored in advance in the memory 72, thereby calculating the wind direction based on each output signal of the photosensor 60, and displays the calculated wind direction on the display unit 80.

  Specifically, the calculation unit 70 acquires each output signal of the plurality of photosensors 60 at a predetermined period. Communication between the calculation unit 70 and the plurality of photosensors 60 is not limited to wired communication, and may be wireless communication. The calculation unit 70 determines that the light source 50 is located at the position of the photosensor that outputs a signal equal to or higher than the threshold among the plurality of photosensors 60, and determines the wind direction based on the determined position of the light source 50. To detect. Note that the threshold is set in advance through experiments or the like so that it can be detected whether or not the light source 50 faces the photosensor 60. Further, the memory 72 of the calculation unit 70 stores in advance a map showing the relationship between the position of the light source 50 and the wind direction. Based on the map stored in the memory 72, the calculation unit 70 calculates the wind direction from the position of the photosensor.

Next, an operation example of the anemometer 10 of the present embodiment will be described.
When the weathercock 40 receives the air flow, when a rotational force about the axis m3 is applied to the weathercock 40, the weathercock 40 rotates about the shaft 42, in other words, about the axis m3. As the weathercock 40 rotates, the arm member 33 is pulled by the wires 34 and 35, whereby the arm member 33 rotates about the axis m2. As a result, the light source 50 also rotates around the axis m2.

  In addition, when the weathercock 40 receives the air flow, when the force in the direction of rotation about the axis m <b> 1 is applied to the weathercock 40, the flange portions 310 and 311 of the cylindrical member 31 are the inner walls of the through holes 21 of the sphere 20. Slide against. As a result, the weathercock 40 rotates integrally with the support column 32 and the tubular member 31 about the axis m1. Further, when the support column 32 rotates about the axis m1, the arm member 33 also rotates about the axis m1.

  In this way, the weathercock 40 can rotate in the rotation direction around the axis m3 and the rotation direction around the axis m1. The weathercock 40 changes its posture toward the direction in which the weathercock 40 is receiving the airflow by the rotation operation. Further, based on the rotation operation of the weathercock 40, the light source 50 rotates in the rotation direction around the axis line m2 and the rotation direction around the axis line m1. The rotation operation of the light source 50 is a rotation operation around the center point of the sphere 20. The calculation unit 70 detects the position of the light source 50 by the photo sensor 60 to calculate the direction of the air flow received by the weathercock 40.

  For example, as shown in FIG. 4, when the weathercock 40 receives an air flow in the direction indicated by the arrow W, the weathercock 40 rotates about the axis m3. As the weathercock 40 rotates, the position of the light source 50 changes in the rotation direction about the axis m <b> 2 and faces a predetermined photosensor 62 among the plurality of photosensors 60. As a result, the output signal of the photosensor 62 becomes equal to or greater than the threshold value. At this time, the calculation unit 70 determines that the light source 50 is positioned at the position of the photosensor 62 that outputs a signal equal to or greater than the threshold, and the wind direction is indicated by the arrow W based on the determined position of the light source 50. Detect that the direction is shown. In addition, the calculation unit 70 displays the detected wind direction on the display unit 80.

  Moreover, although illustration is abbreviate | omitted, when the weathercock 40 rotates centering on the axis line m1 by receiving an airflow, the light source 50 rotates centering on the axis line m1. Due to the change in the rotational position of the light source 50, the position of the photosensor that outputs a signal equal to or higher than the threshold value changes. Therefore, the calculating part 70 can detect a wind direction similarly based on the position of the photo sensor 60 which is outputting the signal more than a threshold value.

  Needless to say, even when the weathercock 40 rotates in the rotation direction in which the rotation direction centered on the axis m1 and the rotation direction centered on the axis m3 are combined, the calculation unit 70 can detect the wind direction in the same manner. .

  According to the anemometer 10 of this embodiment demonstrated above, the effect | action and effect shown by the following (1)-(3) can be acquired.

  (1) In the anemometer 10 of this embodiment, it is not necessary to provide a wiring structure in the weathercock 40 corresponded to a wind receiving part. Therefore, the wiring structure of the anemometer 10 can be simplified.

  (2) The light source 50 is arranged inside the hollow sphere 20 as a detected portion, and rotates around the center point of the sphere 20 based on the operation of the weathercock 40. The photo sensor 60 detects light emitted from the light source 50. Specifically, the photosensor 60 is disposed on the inner surface of the sphere 20 as a position detection unit, and detects the rotational position of the light source 50 around the center point of the sphere 20 in a non-contact manner. According to such a structure, the non-contact structure of a to-be-detected part and a position detection part is easily realizable.

  (3) A plurality of photosensors 60 are provided on the inner surface of the sphere 20 so as to be radially dispersed from the center point of the sphere 20 as a base point. Thereby, since the rotation position of the light source 50 centering on the axis line m1 and the rotation position of the light source 50 centering on the axis line m2 can be detected, respectively, it is possible to detect the wind direction in all directions as a result. Become.

In addition, the said embodiment can also be implemented with the following forms.
In the above embodiment, the light source 50 is used as the detected part and the photosensor 60 is used as the position detecting part. However, the configurations of the detected part and the position detecting part can be changed as appropriate. For example, as shown in FIG. 5, a proximity sensor 90 may be arranged on the inner surface of the sphere 20 instead of the photosensor 60. In this case, the metal member 100 is provided at the tip 331 of the arm member 33 instead of the light source 50. As the proximity sensor 90, for example, a sensor composed of a detection coil and an oscillation circuit can be used. In the proximity sensor 90, when the metal member 100 approaches a high-frequency magnetic field emitted from the detection coil, an induced current flows through the metal member 100 due to an electromagnetic induction phenomenon, and heat loss occurs in the metal member 100. Due to this heat loss, the oscillation circuit cannot maintain the oscillation state, and the oscillation is attenuated or stopped. The proximity sensor 90 is configured to output a predetermined signal when the oscillation of the oscillation circuit attenuates or stops.

  The calculation unit 70 may correct the detected wind direction based on the attitude of the anemometer 10. For example, the sphere 20 is provided with a posture sensor and a geomagnetic sensor. The posture sensor detects the relative inclination angle of the anemometer 10 with respect to the vertical direction, for example, by detecting the direction of gravitational acceleration, and outputs a detection signal corresponding to the detected inclination angle. The geomagnetic sensor detects the direction of geomagnetism and outputs a detection signal corresponding to the detected direction of geomagnetism. The calculation unit 70 captures the detection signal of the attitude sensor and the detection signal of the geomagnetic sensor at a predetermined cycle. The calculation unit 70 detects the attitude of the anemometer 10 with respect to the vertical direction and the geomagnetic direction based on the detection signals of the attitude sensor and the geomagnetic sensor, and calculates the wind direction correction value based on the detected anemometer 10. . The calculation unit 70 calculates the wind direction based on the output signal of the photosensor 60, and then corrects the calculated wind direction based on the wind direction correction value. According to such a configuration, even when the anemometer 10 is installed in a place with a large undulation, it is possible to detect an accurate wind direction and to easily change the installation location of the anemometer 10.

  The means and / or function provided by the arithmetic unit 70 can be provided by software stored in the substantial memory 72 and a computer that executes the software, only software, only hardware, or a combination thereof. For example, when the arithmetic unit 70 is provided by an electronic circuit that is hardware, it can be provided by a digital circuit including a large number of logic circuits or an analog circuit.

  -This invention is not limited to said specific example. That is, the above-described specific examples that are appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, shape, size, and the like are not limited to those illustrated, and can be changed as appropriate. Moreover, each element with which embodiment mentioned above is provided can be combined as long as it is technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

10: Wind direction meter 20: Sphere 40: Weather vane (wind receiving part)
50: Light source (detected part)
60: Photo sensor (position detection unit)
70: Calculation unit 90: Proximity sensor (position detection unit)
100: Metal member (detected part)

Claims (5)

A wind receiving portion (40) that operates by receiving an air flow;
Detected portions (50, 100) that are displaced based on the operation of the wind receiving portion;
A position detector (60, 90) for detecting the position of the detected part in a non-contact manner;
A calculation unit (70) for calculating the direction of the airflow received by the wind receiving unit based on the position of the detected unit detected by the position detection unit;
An anemometer equipped with. Further comprising a hollow sphere (20),
The detected part is arranged inside the sphere, and rotates around the center point of the sphere based on the operation of the wind receiving part.
The anemometer according to claim 1, wherein the position detection unit is disposed on an inner surface of the sphere, and detects a rotation position of the detected portion around a center point of the sphere in a non-contact manner. The anemometer according to claim 2, wherein a plurality of the position detection units are provided radially on the inner surface of the sphere by being dispersed radially from the center point of the sphere. The detected part is a light source,
The anemometer according to any one of claims 1 to 3, wherein the position detection unit is a photosensor (60) that detects light emitted from the light source. The anemometer according to any one of claims 1 to 3, wherein the position detection unit is a proximity sensor (90) that detects an approach of the detected unit.

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