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DESCRIPTION JP2008193141

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DESCRIPTION JP2008193141
PROBLEM TO BE SOLVED: In the conventional ultrasonic sensor, there is a problem that adhered
contaminants can not be completely removed. SOLUTION: The ultrasonic sensor main body 4 has
one terminal of a cord 5 connected to a measuring instrument, and the other end connected to an
ultrasonic transducer (not shown) mounted in the ultrasonic sensor main body 4, The
photocatalyst 6 is coated on the ultrasonic wave transmitting / receiving surface 4 a of the
ultrasonic sensor main body 4, and when light is irradiated to the photocatalyst 3, activation
from the moisture in the air or water in the water is activated by the activation action of the
photocatalyst 3 The oxygen hydroxyl radical can be generated, the organic substance to be
attached to the ultrasonic sensor main body 1 can be decomposed by the strong oxidizing power
and the reducing power, and the organic substance to be contaminated can be decomposed to
prevent the contamination. [Selected figure] Figure 1
Ultrasonic sensor with self-cleaning function
[0001]
The present invention relates to an ultrasonic sensor having a self-cleaning function of coating a
photocatalyst on an ultrasonic wave irradiation surface to automatically clean the ultrasonic
wave irradiation surface of the ultrasonic sensor.
[0002]
The ultrasonic wave irradiation surface of the conventional ultrasonic sensor is polluted in the air
by exhaust gas, dust and the like, and in the water, there is contamination where fine particles,
organisms, bacteria and the like adhere, and such pollution is eliminated For this purpose, as
shown in FIG. 4, the wiper 2 is brought into contact with the ultrasonic wave irradiated surface 1
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a of the ultrasonic sensor 1 and the wiper is driven by the driving device 3 to clean the ultrasonic
wave irradiated surface. The cleaning solution was irradiated to clean the ultrasonic wave
irradiated surface of the ultrasonic sensor. .
[0003]
However, in such a conventional ultrasonic sensor cleaning device, such contamination can not
be completely removed, and must be periodically cleaned manually, which is troublesome. The
[0004]
The problem to be solved is that the conventional ultrasonic sensor can not completely remove
the attached contaminants.
[0005]
In the present invention, the ultrasonic sensor incorporates an ultrasonic transducer, the
photocatalyst is coated on the ultrasonic wave irradiated surface of the ultrasonic sensor, and the
photocatalyst is irradiated with light, thereby causing contamination by the activation action of
the photocatalyst. It has a self-cleaning function characterized by decomposing substances to
prevent contamination.
[0006]
In the ultrasonic sensor according to the present invention, the photocatalyst is coated on the
surface to which the ultrasonic wave is applied, and when the photocatalyst is irradiated with
light, the activating action of the photocatalyst causes active oxygen hydroxyl radicals from water
in the air and water in the water. It is possible to decompose organic substances that are to be
produced and to be attached to the ultrasonic sensor by strong oxidizing power and reducing
power, and to decompose the organic substances to be polluted to prevent pollution.
[0007]
By coating the photocatalyst mainly on the transmission / reception radiation surface of the
ultrasonic sensor and irradiating the photocatalyst with light, it is possible to decompose the
organic substance to be contaminated from the activation action of the photocatalyst and prevent
the contamination.
[0008]
FIG. 1 is a perspective view of an ultrasonic sensor according to another embodiment of the
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present invention. In the ultrasonic sensor body 4, one terminal of a cord 5 is connected to a
measuring instrument, and the other end is mounted in the ultrasonic sensor body 4. The
photocatalyst 6 is connected to an ultrasonic transducer (not shown), and a photocatalyst 6 is
coated on the ultrasonic wave transmitting / receiving surface 4 a of the ultrasonic sensor main
body 4.
[0009]
When light is irradiated to the ultrasonic sensor main body 4 of the present embodiment
configured as described above, active oxygen hydroxyl radicals are generated from the moisture
in the air that is easy to be hydrated by the activation action of the photocatalyst 6, and the
strong oxidation occurs. The organic substance to be attached to the ultrasonic sensor main body
4 can be decomposed by the force and the reducing power, and the organic substance to be
contaminated can be decomposed to prevent the contamination.
[0010]
FIG. 2 is a perspective view of an ultrasonic sensor according to another embodiment of the
present invention, wherein 4 is an ultrasonic sensor body, 5 is a cable, and 6 is a photocatalyst
coated on the ultrasonic wave transmitting / receiving surface 4a of the ultrasonic sensor body 4
Since these configurations are the same as the above embodiment, the description is omitted, but
in this embodiment, the illumination light 7 is mounted in the vicinity of the photocatalyst 6, and
the cable 8 connected to the illumination light 7 is a power supply ( Not shown).
[0011]
In this embodiment configured as described above, light is irradiated from the irradiation light 7
to the photocatalyst 6 coated on the ultrasonic wave transmitting / receiving wave surface 4a,
whereby the photocatalyst 6 coated on the ultrasonic wave transmitting / receiving wave area 4a
is assured Since the light is irradiated, even in the dark, active oxygen hydroxyl radicals are
generated from the moisture in the air and the moisture in the water by the activation action of
the photocatalyst 6 by the radiated light, and super power is generated by the strong oxidizing
power and reducing power. The organic substance to be attached to the acoustic wave sensor
main body 1 can be decomposed, and the organic substance to be contaminated can be
decomposed to prevent the contamination.
[0012]
FIG. 3 is a perspective view of an ultrasonic sensor according to still another embodiment of the
present invention, wherein 4 is an ultrasonic sensor body, 5 is a cable, and 6 is a photocatalyst
coated on the ultrasonic wave transmitting / receiving wave 4a of the ultrasonic sensor body 4.
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Since these configurations are the same as the above embodiment, the description is omitted, but
in this embodiment, the reflector 9 is mounted in the vicinity of the photocatalyst 6, and the
reflector 9 condenses the surrounding light. Then, the photocatalyst 6 is irradiated.
[0013]
In this embodiment configured as described above, light is irradiated from the reflection plate 9
to the photocatalyst 6 coated on the ultrasonic wave transmitting / receiving wave surface 4a, so
that the photocatalyst 6 coated on the ultrasonic wave transmitting / receiving wave area 4a is
assured Since the light is irradiated, active oxygen hydroxyl radical is created from the moisture
in the air and the moisture in the water by the activation action of the photocatalyst 6 by the
radiated light, and the ultrasonic sensor main body 1 by the strong oxidizing power and reducing
power It is possible to prevent the contamination by decomposing the organic substance to be
attached to the organic substance and the organic substance to be polluted.
[0014]
In the above embodiment, the photocatalyst is coated on the ultrasonic wave transmitting and
receiving wave surface of the ultrasonic sensor, but the photocatalyst may be used also in a place
where it is easily contaminated by other ultrasonic transducers. Can.
[0015]
It is a perspective view of the ultrasonic sensor of the Example of this invention.
It is a perspective view of the ultrasonic sensor of the other Example of this invention.
It is a perspective view of the ultrasonic sensor of the other Example of this invention.
It is a perspective view of the conventional ultrasonic sensor.
Explanation of sign
[0016]
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4 ultrasonic sensor body 5 cable 6 photocatalyst 7 irradiation light 8 cable 9 reflector
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