JPH065633Y2 - Anti-ic snow equipment for ultrasonic wind anemometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a probe for transmitting or receiving ultrasonic waves in an ultrasonic wind anemometer that measures the wind direction wind speed by utilizing the propagation velocity of ultrasonic waves in the air. The present invention relates to an anti-icing snow device that prevents the snow from freezing due to the adhesion of ice and snow.

(Prior Art) An ultrasonic anemometer is advantageous in that it can measure a slight wind speed because it uses the propagation velocity of ultrasonic waves in the air.

In a cold region or the like, if snow or icing occurs on the probe, it becomes impossible to send and receive ultrasonic waves, which makes measurement impossible. As a measure against this, the ice and snow is melted by warming the probe with an electric heater, or by projecting light with a projector and warming it with the heat.

(Problems to be solved by the invention) However, in the above-mentioned conventional device, in the former case, the probe needs to have a special structure in order to incorporate the heater, and in the latter case, heat is transferred through the air. Especially, it was easily affected by wind, and a sufficient melting ice and snow effect was not obtained.

Therefore, in view of the above-mentioned conventional problems, it is an object of the present invention to provide an anti-icing snow device for an ultrasonic anemometer that can efficiently heat a probe without being affected by wind.

(Means for Solving the Problem) However, the gist of the present invention is to have a probe that transmits or receives ultrasonic waves, and measures the wind direction wind speed using the propagation speed of ultrasonic waves in the air. In the ultrasonic anemometer, the same number of far-infrared radiators that emit far-infrared rays as the number of the probes are provided, and a mounting bracket is attached to the body so that the far-infrared radiators emit the far-infrared rays toward each probe. I installed it at.

(Operation) Therefore, since the far infrared rays emitted from each far infrared radiator to each probe have a wavelength within the absorption wavelength band of each probe, they are efficiently absorbed by each probe, and It is possible to prevent ice accretion and snow accretion.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, an ultrasonic anemometer 1 has a body 2 in which a body 3 is vertically installed on a base 2, and main columns 4a to 4 are provided at the tips thereof.
Four d are provided, and probes 5a to 5d for transmitting and receiving ultrasonic waves are attached to the main columns 4a to 4d, respectively.

From the propagation time of ultrasonic waves transmitted and received between the pair of probes, the wind direction and the wind speed are measured based on a predetermined arithmetic expression.

The anti-icing snow device 10 includes four far infrared radiators 11a to 11d.
And radiator mounting arms 12a to 12d for supporting this and mounting brackets 13 for supporting each of the radiating mounting arms 12a to 12d. The mounting bracket 13 is composed of two parts and is integrated by bolts 14. It is mounted on the body 3. It can be removed in the summer.

Four far-infrared radiators 11a to 11d are provided corresponding to the number of probes 5a to 5d, and have a configuration as shown in FIG. That is, the heating elements 15, 15 such as nichrome wire
And a ceramic radiator 16 provided on the outer side thereof and suitable for emitting far infrared rays, and a reflector 17.

The heating element 15 is usually connected to a commercial power source of 100 V, and is supplied with power separately from the ultrasonic anemometer 1 from, for example, a lead wire 18 attached to the mounting bracket 13.
Far infrared rays are radiated from the ceramic radiator 16 by the heat generated by the heating element 15. This far infrared ray has a wavelength of about 5
An electromagnetic wave of up to 25 μm, which is less likely to be scattered or absorbed by the atmosphere or fine particles in the atmosphere as compared with ultraviolet rays or visible rays, and transmits through the atmosphere well. Also,
Far infrared rays (electromagnetic waves) are not heat, so they are completely unaffected by wind.

The reflector 17 has a semi-arcuate shape, and its reflection surface is plated with aluminum or the like that reflects far infrared rays well.

The temperature sensor 18 detects the outside air temperature, and detects a predetermined temperature at which the outside air temperature becomes icy and snow, and when the temperature reaches such a predetermined temperature, the heating elements 15 and 15 are energized. In addition, a control circuit (not shown) is configured.

In the above configuration, when the temperature sensor 18 detects the temperature of the outside air and the temperature of the outside air becomes equal to or lower than the predetermined temperature,
Energization of the heating elements 15 and 15 is started, and the amount of current is increased as the temperature decreases.

The heat generated by the heating element 15 is generated by the ceramic radiator 16
Far infrared rays are efficiently converted into far infrared rays by
a to 11d to ultrasonic probes 5a to 5 of the anemometer
It is irradiated to d as shown by the arrow in FIG.

The absorption wavelength band of the probes 5a to 5d of the ultrasonic wind anemometer is approximately 6 to 12 μm, similar to the case of a normal object, and the range of the absorption wavelength band in which the radiation from the ceramic radiator 16 is emitted. The temperature of the ceramic radiator 16 is controlled so that the infrared wavelength band is included. Therefore, the probes 5a to 5d of the ultrasonic anemometer 1 receive far infrared rays, absorb and resonate, and are efficiently heated. Far-infrared rays have a longer wavelength than ultraviolet rays and visible rays, so they are not reflected and absorbed by ice, snow, dust, etc. floating in the air. It can be heated reliably without being affected by ice or snow.

Further, since the far-infrared radiators 11a to 11d are arranged below the ultrasonic transmitter 1, they do not affect the measurement.

(Effect of the Invention) As described above, according to the present invention, the wavelength of the far infrared rays emitted from each far infrared radiator is set to fall within the absorption wavelength band of the probe of each ultrasonic anemometer. Moreover, since each probe itself can be reliably heated, icing and snow accretion can be efficiently prevented.

Further, since the far infrared ray has a long wavelength, it is not reflected and absorbed by ice and snow or dust floating in the air, so that the probe can be reliably heated.

Further, the far-infrared radiator is detachable from the ultrasonic anemometer, which is convenient for mounting.

[Brief description of drawings]

FIG. 1 is a front view of an ultrasonic wind anemometer showing an embodiment of the present invention with an anti-icing snow device attached, FIG. 2 is a plan view of the same as above, and FIG. 3 is a sectional view of a far infrared radiator. . DESCRIPTION OF SYMBOLS 1 ... Ultrasonic anemometer, 3 ... Trunk, 5a-5d ... Probe, 11a-11d ... Far-infrared radiator.

Claims (1)

[Scope of utility model registration request] 1. An ultrasonic anemometer that has a probe for transmitting or receiving ultrasonic waves, and measures the wind speed using the propagation velocity of the ultrasonic waves in the air. A far infrared radiator that emits far infrared rays. The same number as the number of the probes is provided, and the far-infrared radiator radiates far-infrared rays having a wavelength within the absorption wavelength band of the probe.