JPH074580Y2 - Anemometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an anemometer for measuring wind direction and wind speed.

[Conventional technology]

Generally, a wind direction anemometer is composed of a wind direction body which is supported on a base and freely rotates in a horizontal plane, and a wind speed measuring wind turbine which is attached to the wind direction body and freely rotates around an axis orthogonal to the rotation axis of the wind direction body. There is.

The wind direction is obtained from the relative angle between the base and the wind direction body, and the wind speed is obtained from the rotation speed of the wind speed measurement wind turbine.

Therefore, in order to take out the wind speed signal to the outside, this wind speed signal must be transmitted from the rotating wind direction member to the base.

A method using intermittent light is used as means for transmitting the wind speed signal from the wind direction body to the base.

And as a conventional wind direction and anemometer of this kind, it is actually used
It is known that the intermittent light is detected by using an optical fiber, such as the one disclosed in No. 871.

In this conventional wind direction anemometer, one optical fiber is provided in the shaft of a wind direction body that has a wind body and is rotatably supported with respect to a base body, with its upper end facing the rotating body and its lower end facing the base body. The light-emitting element and the light-receiving element provided in the interior are arranged so as to face each other.

The upper end of the optical fiber facing the rotating body is separated into a light-emitting optical fiber and a light-receiving optical fiber, and the lower end is similarly separated into a light-emitting optical fiber and a light-receiving optical fiber. The optical fiber for receiving light is arranged at the center of the shaft, and the optical fiber for emitting light is arranged concentrically around it.
Further, the light receiving elements are arranged to face the surrounding optical fibers for light emission.

[Problems to be solved by the invention]

In the above conventional anemometer, there is a problem that the structure of the optical fiber becomes complicated, and a general ready-made optical fiber cannot be used, which is expensive.

In addition, since the light emitting element and the light receiving element must be placed in the narrow part of the lower end of the optical fiber, the installation configuration becomes complicated, and the sensitivity of the light receiving element is reduced due to the mutual influence of both optical elements, and the wind speed resolution is reduced. There was a problem that was bad.

[Purpose of device]

The present invention has been made in view of the above, and can be inexpensively configured by using an inexpensive optical fiber, and the light emitting device and the light receiving device can be arranged apart from each other, and the light emitting device and the light receiving device are mutually It is an object of the present invention to provide an anemometer that does not affect each other and can improve the resolution of wind speed.

[Means and Actions for Solving Problems]

In order to achieve the above object, the anemometer according to the present invention is oriented in a direction perpendicular to the shaft body 4 on a wind direction body 3 rotatably provided on a base body 1 through a hollow shaft body 4. A wind vehicle body 9 having a rotating shaft 8 is provided, and a slit disk 10 rotated by the wind vehicle body 9 is also provided.
An annular light-emitting body 14 surrounding the outer periphery of the shaft body 4 and a light receiver 15 facing the end surface of the shaft body 4 are provided in the base body 1 supporting the shaft body 4,
Further, two optical fibers 16 and 17 are provided in the shaft body 4, one end of one optical fiber 16 is opposed to the light emitting body 14 through a light receiving window 13 provided on the circumferential side of the shaft body 4, and the other optical fiber 17 is provided. One end of the shaft 4 from the end of the shaft 4 to face the photodetector 15,
The other ends of the both optical fibers 16 and 17 are made to face each other through the slit portion of the slit disk 10, and the light from the light emitting body 14 is a light receiving window provided on the shaft body 4.
It is transmitted from one end of one optical fiber 16 from 13
The slit portion of the slit disk 10 is irradiated from the other end. Then, this irradiation light is received as pulsed light by the other optical fiber 17 through the slit portion, is detected by the light receiver 15, and the wind speed is measured based on the detected value.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. First
The figure shows a longitudinal section of the anemometer of the present invention. 1 in the figure
Is a base body, and a support portion 2 is formed on the upper inner peripheral portion of the base body 1.

Reference numeral 3 in the drawing is a wind direction body, and a hollow shaft body 4 is provided in the lower center of the wind direction body 3 at a right angle to the axis of the wind direction body 3. A support portion 5 is provided at the tip of the wind direction body 3, and a directional wing 6 is provided at the rear end of the wind direction body 3.

A rotary shaft 8 is supported by a bearing portion 5 of the wind direction body 3 via a bearing 7. A wind vehicle body 9 is fixed to an outer end portion of the rotary shaft 8 and an inner end portion of the rotary shaft 8. A slit disk 10 is fixed to the. A plurality of slits 11 are formed on the slit disk 10 at predetermined intervals in the circumferential direction.

The wind direction body 3 is rotatably provided on the base body 1 by being supported by the shaft body 4 and the support portion 2 of the base body 1 via a bearing 19. A code plate 12 for detecting the wind direction is provided at the lower end of the shaft body 4.
Is fixed, and a light receiving window 13 is opened at the lower part on the circumferential side of the shaft body 4.

An annular luminous body surrounding the outer periphery of the shaft body 4 in the base body 1.
14 is arranged, and the light a emitted from the light emitting body 14 irradiates the shaft body 4 from all directions, and the light a is the light receiving window 13
It is something that enters.

Further, a light receiver 15 is arranged in the base 1 at a position facing the end face of the shaft body 4.

Two optical fibers 16 and 17 are arranged in the shaft body 4, and one end portion 16a of one optical fiber 16 is the light receiving window 1
The other end 16b of the optical fiber 16 is located inside the wind direction body 3 and behind the slit disk 10. Further, one end 17a of the other optical fiber 17 is located in front of the slit disk 10 and faces the other end 16b of the optical fiber 16 with the slit disk 10 in between. The other end 17b of the optical fiber 17 is close to the photodetector 15.

A wind direction detector 18 for detecting the wind direction from the code plate 12 is provided in the base 1.

The light-emitting body 14 may be composed of a light-emitting diode or a lamp, or a light source box having a structure with good internal reflection may be used.

Next, the operation will be described.

When the wind direction body 1 is hit by wind, the wind body 9 rotates, and the direction vanes 6 rotate the wind direction body 1 in the wind direction so that their axes coincide with each other. The rotation of the wind direction body 1 causes the code plate 12 to rotate via the shaft body 4, and by reading the code of the code plate 12, the wind direction detector 18 detects the wind direction.
The slit disk 10 is rotated via the rotating shaft 8 by the rotation of the wind vehicle body 9. The light emitted from the light emitter 14 is received by the light receiving window 13
Enter the slit disk 10 through the optical fiber 16
Irradiate. This irradiated light a is converted into a light pulse signal by the rotation of the slit disk 10 and is converted into the above optical fiber.
It reaches the light receiver 15 via 17.

This light receiver 15 counts light pulses. Then, the wind speed is measured based on the coefficient value of the light pulse.

[Effect of device]

According to the present invention, the wind direction body 3 rotatably provided on the base body 1 through the hollow shaft body 4 is provided with the wind vehicle body 9 having the rotating shaft 8 oriented in the direction perpendicular to the shaft body 4 and A slit disk 10 rotated by the wind vehicle body 9 is provided, and an annular light-emitting body 14 surrounding the outer periphery of the shaft body 4 is opposed to the end face of the shaft body 4 in the base body 1 supporting the shaft body 4. Receiver
15 and two optical fibers 16 and 1 in the shaft body 4.
7 is provided, one end of one optical fiber 16 is opposed to the light emitting body 14 through a light receiving window 13 provided on the peripheral side of the shaft body 4, and the other end of the optical fiber 17 is a light receiver from the end portion of the shaft body 4. 15
And the other ends of the both optical fibers 16 and 17 are opposed to each other via the slit portion of the slit disk 10 to form an anemometer, so that the optical fibers 16 and 17 are provided.
One can be used for emitting light and one for receiving light. Therefore, it is not necessary to arrange the optical fibers irregularly, and a simple optical fiber structure can be formed. Inexpensive single-core off-the-shelf products can be used. Further, according to the present invention, the light emitter 14 and the light receiver 15 can be installed separately from each other, and it is possible to prevent the both from affecting each other, and as a result, the sensitivity of the light receiver 15 is improved. The wind speed resolution can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II in FIG. DESCRIPTION OF SYMBOLS 1 is a base body, 2 is a support part, 3 is a wind direction body, 4 is a shaft body, 5 is a support part, 6 is a direction wing, 7 is a bearing, 8 is a rotating shaft, 9 is a wind body, 10 is a slit disk, 11 Is a slit, 12 is a code plate, 13
Is a light receiving window, 14 is a light emitter, 15 is a light receiver, 16 and 17 are optical fibers, and 18 is a wind direction detector.

Claims (1)

[Scope of utility model registration request] 1. A wind direction body 3 rotatably provided on a base body 1 via a hollow shaft body 4 is provided with a wind body 9 having a rotary shaft 8 oriented at a right angle to the shaft body 4, and A slit disk 10 rotated by the wind vehicle body 9 is provided, and an annular light-emitting body 14 surrounding the outer periphery of the shaft body 4 and the end face of the shaft body 4 are opposed to each other in the base body 1 supporting the shaft body 4. A light receiver 15 is provided, two optical fibers 16 and 17 are further provided in the shaft body 4, and one end of one of the optical fibers 16 is connected to the light emitter 14 through a light receiving window 13 provided on the peripheral side of the shaft body 4. The one end of the local optical fiber 17 is made to face the optical receiver 15 from the end of the shaft body 4, and the other ends of the both optical fibers 16 and 17 are made to face each other via the slit portion of the slit disk 10. An anemometer that is characterized.