JPH0142048Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a propeller-type anemometer.

This type of wind speed and direction anemometer is equipped with a body that can rotate freely on a fixed stand, and the body is equipped with a tail for directing the body in the direction of the wind, as well as a propeller, and an electrical signal is transmitted by the rotation of the propeller. is guided to the fixed stand to measure the wind speed. Therefore, in order to guide electrical signals from the rotating body to the fixed stand, movable contact parts such as brushes are necessary, and problems such as wear and poor contact occur with these parts when used for long periods of time. Moreover, the response to wind due to contact resistance was poor.

In order to eliminate the above-mentioned drawbacks, the applicant first proposed a method in which one end surface 11a of the optical fiber 11 was opposed to a rotating body 9 that rotates due to the rotation of the propeller 2, as shown in FIGS. 1 and 2. The other end surface 11b of the optical fiber 11 is formed into a ring shape around the center of rotation of the body 1, and the light emitting element 15 and the light receiving element 16 are arranged to face each other on the ring-shaped end surface 11b. devised a plan (Jetgen 57-)
No. 176959). However, in the above idea,
As shown in FIG. 2, since spur gears 18 and 19 are used to transmit the rotation of the body 1 to the wind direction transmitter 17, wind direction errors may occur due to backlash of the spur gears 18 and 19, and the wind direction transmitter The lower part of the stand 6 on which the instrument 17, spur gears 18, 19, etc. are installed is large, which has the disadvantage of affecting wind measurement.

Therefore, the purpose of this invention was to eliminate the above drawbacks, and its main purpose was to attach a propeller that rotates by wind power to a rotatable fuselage so as to face the direction of the wind. A rotating body that rotates due to the rotation of the propeller is provided,
One end surface of the optical fiber is provided on the rotating body to face each other, and the other end surface of the optical fiber is formed in a ring shape around the center of rotation of the body,
In this anemometer in which a light emitting element and a light receiving element are provided facing each other on the ring-shaped end surface, a transmission axis centered on the rotation center of the rotating body is provided on the ring-shaped end surface of the optical fiber. With,
The reason is that the rotation axis of the wind direction transmitter, to which wind direction rotation is transmitted from the transmission shaft, is arranged at the same rotation center as the transmission shaft. Therefore, wind direction information can be transmitted without using a spur gear, so the above-mentioned problem can be achieved.

Examples of this invention will be described below with reference to the drawings.

3 to 6, a fuselage 1 has a propeller 2 rotatably disposed at its tip via a bearing 3, and a tail fin 4 is provided on the side opposite to the propeller. It is controlled to follow the direction of the wind.

A support cylinder 5 is provided vertically below the center of the body 1, a fixed stand 6 is inserted into the support cylinder 5, and a bearing 7 is interposed between the support cylinder 5 and the fixed stand 6. The body 1 is rotatably supported by a fixed stand 6.

A rotating shaft 8 rotated by the propeller 2 is located inside the body 1, and a rotating body 9 is provided on the side opposite to the propeller. As shown in FIG. 4, 12 reflective tapes 10 are provided on the rotating body 9 at equal angles on the same circumference, and one side of the optical fiber 11 is attached to the reflective tape 10 of the rotating body 9. The end surfaces 11a of the two are provided facing each other with an appropriate gap.

The optical fibers 11 are made up of a plurality of fibers bundled at random, and a guide tube 13 is suspended from a lower cover 12 integrated with the support body 5 on the axis of rotation of the body.
The other end surface 11b is the fifth
As shown in FIG. 6, it is formed into a ring shape centered on the rotation center of the body 1. Further, the other end surface 11b side of the optical fiber 11 is fixed with resin or the like to a guide tube 13 which is rotatably supported by the stand 6 through a bearing 14. Furthermore, the optical fiber 11
The center, that is, the body 1 is located on the other end surface 11b of
A transmission shaft 20 is provided to protrude downward at the center of rotation.

This transmission shaft 20 is mechanically coupled by a coupling 21 to a rotation shaft 22 of a wind direction transmitter 17 arranged at the center of rotation of the fuselage 1 . The rotation of the fuselage 1 is therefore transmitted to the wind direction transmitter 17.

The wind direction transmitter 17 can be, for example, a synchro transmitter, a potentiometer, an encoder, etc., and may use either an analog or digital signal.

On the other hand, the light emitting element 15 and the light receiving element 16 are fixed to the stand 6 and are provided facing the other ring-shaped end surface 11b of the optical fiber 11. In this embodiment, the light emitting element 15 and the light receiving element 16
are arranged at symmetrical positions with respect to the axial center of the optical fiber 11.

That is, the light from the light emitting element 15
Optical fiber 11 from the end of optical fiber 11 facing
The reflected light is reflected through the reflective tape 10 on the rotating body 9, and the reflected light is returned through the optical fiber again, and the light from the end of the optical fiber 11 facing the light receiving element 16 is detected by the light receiving element 16. It is something that will be done,
A part of the end surface 11b of the optical fiber 11 is a part of the light emitting element 1.
5 or the portion facing the light receiving element 16 acts as a transmitting means for emitting or receiving light.

In the above configuration, the light from the light emitting element 15 is introduced from a part of the ring-shaped end surface 11b, which is the other end surface 11b of the optical fiber 11.
guided to one end surface via the optical fiber 11,
Light is reflected from the end face to the rotating body 9. When the propeller 2 is rotated, the rotating body 9 is rotated, so
The light from the end face 11a of the optical fiber 11 becomes an intermittent light signal by the reflective tape 10 adhered to the rotary body 9, and is received by the non-emitting optical fiber 11 to form a ring which is the other end face 11b. The light is guided to the light receiving element 16 from a part of the end face of the shape. The light receiving element 16 converts the light intermittent signal into a pulse, which is input to a control circuit (not shown), and the wind speed is displayed on a recording device or the like.

On the other hand, the wind direction is determined by controlling the body 1 to follow the wind direction, and the rotational movement at that time is transmitted to the rotation shaft 22 of the wind direction transmitter 17 via the transmission shaft 20 and the coupling 21. Transmitter 17
is obtained as the output signal of

As described above, according to this invention, the wind direction signal transmitted to the wind direction transmitter is transmitted via the transmission shaft located at the rotation center of the fuselage to the rotation shaft of the wind direction transmitter also located at the rotation center. This makes it possible to eliminate the wind direction error that had occurred.

Furthermore, the lower part of the stand in which the wind direction transmitter and the like are housed can be made smaller, thereby reducing the influence of the lower part of the stand on the measurement of wind direction and speed.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional wind direction and speed meter, Figure 2 is an enlarged sectional view of the vicinity of the lower end of the same optical fiber, Figure 3 is a sectional view of the wind direction and speed meter according to this invention, and Figure 4 is the same rotating body. FIG. 5 is an enlarged sectional view of the vicinity of the lower end of the optical fiber, and FIG. 6 is a front view and left and right side views of the optical fiber. 1... fuselage, 2... propeller, 9... rotating body,
11... Optical fiber, 20... Transmission shaft, 21...
Coupling ring, 22...rotating shaft.

Claims (1)

[Scope of utility model registration request] A propeller that is rotated by the wind is attached to the body, which is rotatable so as to face the direction of the wind, and a rotating body that rotates due to the rotation of the propeller is installed, and one end surface of the optical fiber is placed opposite to this rotating body. In the anemometer, the other end surface of the optical fiber is formed into a ring shape around the center of rotation of the body, and a light emitting element and a light receiving element are provided facing each other on the ring-shaped end surface. ,
On the ring-shaped end face of the optical fiber,
A wind direction and anemometer characterized in that a transmission shaft centered on the rotation center of the rotating body is provided, and a rotation shaft of a wind direction transmitter to which wind direction rotation is transmitted from the transmission shaft is arranged at the same rotation center as the transmission shaft. .