KR101491462B1 - Ultrasonic transducer for long-distance - Google Patents

Ultrasonic transducer for long-distance Download PDF

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Publication number
KR101491462B1
KR101491462B1 KR20140011367A KR20140011367A KR101491462B1 KR 101491462 B1 KR101491462 B1 KR 101491462B1 KR 20140011367 A KR20140011367 A KR 20140011367A KR 20140011367 A KR20140011367 A KR 20140011367A KR 101491462 B1 KR101491462 B1 KR 101491462B1
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KR
South Korea
Prior art keywords
height
ultrasonic transducer
chamber
depth
wall
Prior art date
Application number
KR20140011367A
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Korean (ko)
Inventor
박지황
유갑상
채민구
윤장호
Original Assignee
아이에스테크놀로지 주식회사
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Priority to KR20140011367A priority Critical patent/KR101491462B1/en
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Publication of KR101491462B1 publication Critical patent/KR101491462B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004—Means for monitoring or calibrating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/521—Constructional features

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

According to another aspect of the present invention, there is provided an ultrasonic transducer in the form of a cylinder having a first height, the inner chamber having a predetermined depth at the center of the ultrasonic transducer; And a wall of a first height filled with a damping material surrounding the inner chamber, the inner chamber having a first depth in the form of a snowman with a concave central portion in the interior thereof, ; And a second chamber having a second depth corresponding to a difference between the predetermined depth and the first depth on the first chamber, wherein the wall of the first height has a first height, And the second wall is a wall formed with a thickness thereof so as to have a second height lower than the height.

Description

[0001] ULTRASONIC TRANSDUCER FOR LONG-DISTANCE [0002]

The present invention relates to an ultrasonic transducer for a long distance, and more specifically, to an ultrasonic transducer for a long distance for improving sensitivity.

The ultrasonic transducer can be used as a parking assisting device of a vehicle.

1 is a view showing a conventional ultrasonic transducer. Referring to FIG. 1, a conventional ultrasonic transducer is configured in the form of a radiation surface having different lengths in the transverse and longitudinal directions.

The short transverse plane has a wide transverse ultrasonic beam angle, and the long transverse plane has a short transverse ultrasonic beam angle.

However, this type of radiation surface has a small area, and thus the sensor sensitivity of ultrasonic transmission and reception deteriorates.

Accordingly, an object of the present invention is to provide an ultrasonic transducer in which an ultrasonic beam angle is adjusted to improve sensor sensitivity of ultrasonic transmission and reception.

According to another aspect of the present invention, there is provided an ultrasonic transducer in the form of a cylinder having a first height, the inner chamber having a predetermined depth at the center of the ultrasonic transducer; And a wall of a first height filled with a damping material surrounding the inner chamber, the inner chamber having a first depth in the form of a snowman with a concave central portion in the interior thereof, ; And a second chamber having a second depth corresponding to a difference between the predetermined depth and the first depth on the first chamber, wherein the wall of the first height has a first height and a first height Is a wall formed with a thickness thereof so as to have a second height which is lower than the first height.

The first depth is not less than 50% of the thickness of the thin film and not larger than the first height.

Further, the conversion element is supported by a thin film located on a lower surface thereof, and the thin film has grooves of a certain range separated by a predetermined distance from the wall.

The wall having the first height surrounding the first chamber is characterized in that a predetermined height is removed from a lower portion by a predetermined range.

Wherein the conversion element is supported by a thin film located on a lower surface thereof, the thin film having a thickness having a diameter of the cylinder and a thickness of a structure protruding outwardly with a diameter smaller than the diameter of the cylinder on a lower surface thereof Which is a thin film including an oxide film.

According to another aspect of the present invention, there is provided an ultrasonic transducer in the form of a cylinder having a first height, the inner ultrasonic transducer having a first depth, the inner chamber having a predetermined depth in which the transducer is positioned inside the center of the ultrasonic transducer; And a wall of a first height surrounding the inner chamber, wherein the conversion element is supported by a thin film located on a lower surface thereof, the thin film being of a thickness having a diameter of the cylinder, And has a thickness smaller than the diameter of the cylinder and protruding outward.

According to another aspect of the present invention, there is provided an ultrasonic transducer in the form of a cylinder having a first height, the inner chamber having a predetermined depth at the center of the ultrasonic transducer; And a wall of a first height filled with a damping material surrounding the inner chamber, wherein the inner chamber has a first chamber having a specific depth in a snowman shape with a central portion recessed therein and in which a conversion element is located; And a second chamber above the first chamber, the second chamber having a depth corresponding to the difference between the predetermined depth and the depth of the first chamber, wherein the wall of the first height includes the first height, And a second wall having a second height that is lower than a height of the second chamber, wherein two walls of the wall surrounding the first chamber abut the concave portion of the snowman-like concave portion of the center portion, .

And the thickness of the protruding structure is between 0.1 mm and 3 mm.

According to the ultrasonic transducer of the present invention, the sensor sensitivity of ultrasonic transmission and reception of the ultrasonic transducer is improved.

1 is a view showing a conventional ultrasonic transducer.
2 is a view illustrating an ultrasonic transducer according to an embodiment of the present invention.
3 is a view showing a modification of the ultrasonic transducer according to the embodiment of the present invention.
4 is a view showing still another modification of the ultrasonic transducer according to the embodiment of the present invention.
5 is a view showing still another modification of the ultrasonic transducer according to the embodiment of the present invention.
6 is a view illustrating an ultrasonic transducer according to another embodiment of the present invention.
7 is a view showing a modification of the ultrasonic transducer according to another embodiment of the present invention.
8 is a view showing a modification of the ultrasonic transducer according to another embodiment of the present invention.

Specific structural and functional descriptions of the embodiments of the present invention disclosed herein are for illustrative purposes only and are not to be construed as limitations of the scope of the present invention. And should not be construed as limited to the embodiments set forth herein or in the application.

The embodiments according to the present invention are susceptible to various changes and may take various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application.

It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first and / or second, etc. may be used to describe various components, but the components should not be limited by these terms.

The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

2 is a view illustrating an ultrasonic transducer according to an embodiment of the present invention. 2 is a plan view of the ultrasonic transducer 1, a section A-A 'and a section B-B' of a section.

The ultrasonic transducer 1 corresponds to a cylinder type having a first height h3 and the central portion of the ultrasonic transducer 1 has an inner chamber 3 having a predetermined depth.

The inner chamber 3 includes a first chamber 31 having a first depth h3-h1 and having a conversion element 4 therein and a second chamber 31 having a center portion recessed , And a second chamber (32) having a second depth (h1) corresponding to the difference between the predetermined depth and the first depth on the first chamber.

The ultrasonic transducer 1 also includes a wall 2 of a first height h3 filled with a damping material surrounding the inner chamber 3. [

The wall 2 has a second height h2 which is lower than the first height h3 even though the highest height corresponds to the first height h3 as shown in section B-B ' The wall corresponding to the thickness is formed.

The first depth h3-H1 should be not less than 50% of the thickness of the thin film 5 and not greater than the first height h3 in order to minimize the influence of the heights on the frequency.

The conversion element 4 is supported by a thin film 5 located on the lower surface thereof and the thin film 5 may correspond to the same material as the wall 2 and may be formed of a metal material It may correspond to a coated metal material.

3 is a view showing a modification of the ultrasonic transducer according to the embodiment of the present invention. Fig. 3 includes a top view, sectional view A-A 'and sectional view B-B' of the ultrasonic transducer 10.

The ultrasonic transducer 10 of FIG. 3 is a modification of the ultrasonic transducer 1 shown in FIG. 2, and its basic structure is the same.

The thin film 50 supporting the conversion element 40 at the lower portion of the conversion element 40 is separated from the wall 20 by a predetermined distance (see DETAIL C in FIG. 3) This corresponds to the structure in which it is embedded.

Such a structure allows adjustment of the beam angle in the transverse direction to be narrowed, thereby maximizing the sensitivity.

4 is a view showing still another modification of the ultrasonic transducer according to the embodiment of the present invention. Fig. 4 includes a plan view, cross-sectional view A-A 'and cross-sectional view B-B' of the ultrasonic transducer 100. Fig.

The ultrasonic transducer 100 shown in FIG. 4 is a modification of the ultrasonic transducer 1 shown in FIG. 2, and its basic structure is the same.

However, the wall 200 surrounding the first chamber 310 is characterized in that a predetermined height is removed from a lower portion by a predetermined range (refer to a cross-sectional view AA '), thereby narrowing the beam angle in the vertical direction .

For example, if the removed portion remains, it may be connected to the wall portion of the ultrasonic transducer 100 to interfere with the vibration.

Further, it is assumed that the length of the removed portion does not exceed the circumferential length of the ribbon end portion.

5 is a view showing still another modification of the ultrasonic transducer according to the embodiment of the present invention. FIG. 5 includes a top view, cross-sectional view A-A 'and sectional view B-B' of the ultrasonic transducer 1000.

The ultrasonic transducer 1000 of FIG. 5 is a modification of the ultrasonic transducer 1 shown in FIG. 2, and its basic structure is the same.

However, the height of the sidewall of the first chamber 3100 in section B-B 'is different between m1 and m2, and in the case of the sidewall m1, the portion of the first chamber 3100 is more space above the m1 height do.

That is, referring to the plan view, two walls of the wall surrounding the first chamber 3100 and having a concave portion 2500 of a snowball shape having a concave central portion thereof have different heights of m1 and m2.

Accordingly, the shape of the diaphragm of the ultrasonic transducer 1000 can be adjusted asymmetrically, and the beam angle in the vertical direction and the beam direction can be adjusted.

6 is a view illustrating an ultrasonic transducer according to another embodiment of the present invention. 6 is a plan view of the ultrasonic transducer 1 ', a section A-A' and a section B-B 'of the section.

The ultrasonic transducer 1 'corresponds to a cylindrical shape having a first height, and the central portion of the ultrasonic transducer 1' has an inner chamber 3 'having a predetermined depth.

The ultrasonic transducer 1 'also includes a wall 2' filled with a damping material surrounding the inner chamber 3 '.

The transducing element 4 'is located inside the inner chamber 3' and the transducing element 4 'is of a thickness having a diameter of the cylinder 5' located on the lower surface thereof (52) having a diameter smaller than the diameter of the cylinder and protruding outwardly on the lower surface thereof.

At this time, the cylinder 51 having a diameter of the cylinder has a thickness of 0.1 to 2.0 mm, and the cylinder 52 having a thickness of the outwardly projecting structure may have a thickness of 0.1 to 3.0 mm.

Such a structure may be added to prevent undesired vibrations generated by vibration transmitted from the radiation surface to the side wall and returning to the side surface or transmitted from the outside to the radiation surface through the side wall.

7 is a view showing a modification of the ultrasonic transducer according to another embodiment of the present invention. 7 is a plan view of the ultrasonic transducer 10 ', a section A-A' and a section B-B 'of the section.

The ultrasonic transducer 10 'of FIG. 7 corresponds to an example in which the structure of the ultrasonic transducer 1' shown in FIG. 6 and the structure of the ultrasonic transducer 1 of FIG. 2 are combined.

Referring to the plan view, the outer shape of the inner chamber 30 'may correspond to a pseudo-elliptical structure as shown in FIG. 6, and the inner chamber 30' may include a conversion element 40 ' Shaped first chamber and a second chamber at a specific depth above the first chamber.

 Since the ultrasonic transducer 10 'of FIG. 7 includes the structure of FIG. 6, it has an effect according to the structure of FIG. 6, and additionally, by adding a ribbon shape, the ultrasonic transducer 10' Can be reduced.

8 is a view showing a modification of the ultrasonic transducer according to another embodiment of the present invention. 8 is a plan view of the ultrasonic transducer 10 ', a section A-A' and a section B-B 'of the section.

The ultrasonic transducer 100 'of FIG. 8 has the same basic structure as that of the ultrasonic transducer 10' shown in FIG.

The ultrasonic transducer 100 'of FIG. 8 differs from the ultrasonic transducer 100' of FIG. 8 in that the structural features of FIG. 5 (features of different sidewall heights) are additionally applied.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. I will understand. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (9)

In a cylindrical ultrasonic transducer having a first height,
An inner chamber of a predetermined depth at the center of the ultrasonic transducer; And
And a wall of a first height surrounding the inner chamber,
The inner chamber
A first chamber having a center portion in the shape of a concave snowman and having a first depth and a conversion element disposed therein; And
And a second chamber having a second depth corresponding to a difference between the predetermined depth and the first depth on the first chamber,
Wherein the wall of the first height is a wall formed to have a thickness of the first height and a second height that is lower than the first height. The method according to claim 1,
The conversion element is supported by a thin film located on a lower surface thereof,
Wherein the thin film has grooves of a predetermined range spaced a predetermined distance from the wall. 3. The method of claim 2,
Wherein the first depth is at least 50% of the thickness of the thin film and is not greater than the first height. The method according to claim 1,
The wall having the first height surrounding the first chamber
Wherein a predetermined height is removed from a lower portion by a predetermined range. The method according to claim 1,
The conversion element is supported by a thin film located on a lower surface thereof,
Wherein the thin film is a thin film having a thickness of a diameter of the cylinder and a thickness of a lower surface of the thin film having a diameter smaller than the diameter of the cylinder and protruding outward. delete In a cylindrical ultrasonic transducer having a first height,
An inner chamber of a predetermined depth at the center of the ultrasonic transducer; And
And a wall of a first height surrounding the inner chamber,
The inner chamber
A first chamber in which a center portion has a concave snowman shape and a specific depth and in which a conversion element is located; And
And a second chamber having a depth corresponding to a difference between the predetermined depth and the depth of the first chamber on the first chamber,
Wherein the wall of the first height is a wall formed to have a thickness of the first height and a second height that is lower than the first height,
Wherein two walls of the wall surrounding the first chamber are in contact with the snow-like concave portion having a concave central portion, the walls being different in height from each other. 8. The method of claim 7,
The conversion element is supported by a thin film located on a lower surface thereof,
Wherein the thin film is a thin film having a thickness of a diameter of the cylinder and a thickness of a lower surface of the thin film having a diameter smaller than the diameter of the cylinder and protruding outward. 9. The method according to claim 5 or 8,
Wherein the thickness of the outward protruding structure is between 0.1 mm and 3 mm.
KR20140011367A 2014-01-29 2014-01-29 Ultrasonic transducer for long-distance KR101491462B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10206528A (en) * 1997-01-21 1998-08-07 Oki Ceramic Kogyo Kk Ultrasonic sensor
JP2002058091A (en) * 2000-08-11 2002-02-22 Nippon Soken Inc Ultrasonic sensor for vehicle clearance sonar
JP3179895U (en) * 2012-02-21 2012-11-22 同致電子企業股▲ふん▼有限公司 Ultrasonic sensor assembly module
JP2013172449A (en) * 2012-02-21 2013-09-02 Tung Thih Electronic Co Ltd Ultrasonic sensor and method for manufacturing ultrasonic sensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10206528A (en) * 1997-01-21 1998-08-07 Oki Ceramic Kogyo Kk Ultrasonic sensor
JP2002058091A (en) * 2000-08-11 2002-02-22 Nippon Soken Inc Ultrasonic sensor for vehicle clearance sonar
JP3179895U (en) * 2012-02-21 2012-11-22 同致電子企業股▲ふん▼有限公司 Ultrasonic sensor assembly module
JP2013172449A (en) * 2012-02-21 2013-09-02 Tung Thih Electronic Co Ltd Ultrasonic sensor and method for manufacturing ultrasonic sensor

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