JP2004271390A - Ultrasonic distance measuring system - Google Patents

Ultrasonic distance measuring system Download PDF

Info

Publication number
JP2004271390A
JP2004271390A JP2003063827A JP2003063827A JP2004271390A JP 2004271390 A JP2004271390 A JP 2004271390A JP 2003063827 A JP2003063827 A JP 2003063827A JP 2003063827 A JP2003063827 A JP 2003063827A JP 2004271390 A JP2004271390 A JP 2004271390A
Authority
JP
Japan
Prior art keywords
ultrasonic
distance measuring
ultrasonic distance
measuring device
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003063827A
Other languages
Japanese (ja)
Inventor
Yoshinori Chino
義典 知野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2003063827A priority Critical patent/JP2004271390A/en
Publication of JP2004271390A publication Critical patent/JP2004271390A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater ultrasonic distance measuring system provided with an ultrasonic transceiver easy in maintenance, excellent in oscillation efficiency, and free from parasitic oscillation, and for measuring a water level from a underwater zone. <P>SOLUTION: This ultrasonic distance measuring system 1 for measuring the water level from the underwater zone is provided with an ultrasonic distance measuring instrument comprising the ultrasonic transceiver wherein planar ultrasonic oscillation element 7 and a planar ultrasonic oscillation element 8 are bonded each other with a sound insulating plate 6 therebetween, and wherein a perpendicular to a bonded plane is arranged to be orthogonal to an existing direction of a measuring object (water face) 13, a reflecting plate 9 wherein an inclination angle of a reflecting face is formed at 45° to transform a transceiving direction of the ultrasonic transceiver arranged in the center into a direction of the measuring object (water face) 13, and wherein the center line is provided toward the measuring object (water face) 13, and a water-proof resonance film 12 for sealing an upper end of the reflecting plate 9 of a truncated cone shape. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、超音波距離測定装置に係り、特に、水面上に超音波送受信器を設置するスペースが無い場合の水位計測手段に関する。
【０００２】
【従来の技術】
図１は、水面上から水位を測定する従来の超音波距離測定装置の系統構成を示す図、図２は、その主要部である超音波距離測定器の構造を示す図である。
【０００３】
水面１３上に設置された超音波距離測定器１は、信号ケーブル２により信号変換器３に接続されている。信号変換器３は、信号ケーブル４によりここでは図示していない計測データ処理手段に接続されている。
【０００４】
超音波距離測定器１の超音波送受信器は、遮音板６を挟んで平板の超音波発振素子７および平板の超音波受信素子８を張り合わせ、平板への垂線すなわち超音波発振／受信方向が測定対象物すなわち水面の存在方向（上下方向）に直交して水平になるように配置される。
【０００５】
超音波送受信器１は、超音波送受信器の水平に向いている送信超音波１０と受信超音波１１との方向を前記測定対象物の方向すなわち水面１３に向かう鉛直方向に転換するために、反射面の傾き角が４５度に形成された錐台形状の反射板９を備えている。
【０００６】
水位の計測に際して、信号変換器３は、図示しない計測データ処理手段からの超音波発振指令に基づき、超音波発振素子７を発振させ、超音波を出力させる。
【０００７】
超音波発振素子７から水平方向に出力された送信超音波１０は、反射板９の４５度斜面で反射され、下方に位置する水面１３に向かう。
【０００８】
水面１３で反射した受信超音波１１は、反射板９の４５度斜面で反射され、水平方向に向かって、超音波受信素子８に取り込まれる。超音波受信素子８で検出された反射信号は、信号変換器３を介して、図示しない計測データ処理手段に送られる。
【０００９】
計測データ処理手段は、発信から受信までの時間差を演算し、時間差を水面までの距離すなわち水位に変換する。
【００１０】
このような超音波水位計は、超音波送受信器を水面上に設置するので、水面上にある程度のスペースを必要とし、必要なスペースが得られない場合は、超音波水位計を設置できなかった。水位を計測する水面上に構造物などがある設備においては、超音波送受信器の設置スペースが無かった。
【００１１】
一方、従来の超音波送受信器をそのまま水中に設置すると、浸水による損傷などの問題が生じていた。また、円盤状のセラミック振動子を水平に設置した場合、指向性を良くするには、その直径を大きくする必要があり、超音波送受信器の小型化が困難であった。
【００１２】
そこで、水密にするとともに小型化するために、円筒型セラミック振動子の内面に消音材を充填し、円筒型セラミック振動子，消音材，それらの支持部材をモールド樹脂などの充填材で固め、その外周に金属板またはプラスチックなどからなる逆ロート状の反射体壁を設ける構造が提案されている（例えば、特許文献１参照）。
【００１３】
さらに、それ以前の寸法が大きいフェライト振動子やランジュバン形振動子に代えて、音響インピーダンスが水中の音響インピーダンスにほぼ等しい音波透過材を用いて底面に対する側面の傾き角が４５度の直円錐台を形成し、円錐台の中央部に円筒形振動子を配置した超音波送受信器も提案されている（例えば、特許文献２参照）。
【００１４】
【特許文献１】
特開２００１−１６６０５６号公報（第３〜４頁，図１，図２，図３）
【特許文献２】
特開昭５８−２２５３７１号公報（第１〜２頁，第２図）
【００１５】
【発明が解決しようとする課題】
しかし、特許文献１の超音波送受信器は、モールド樹脂内での超音波の伝わり方に関する検討結果の記載が無く、モールド樹脂で充填したために、発振効率が低下したり、寄生振動が生じたりするおそれがないかが問題となる。また、海水などの液体が中空部に入り込む小孔を開けた反射体壁，ネットの反射体壁，鎧状板片を用いた反射体壁，鱗片を重ね合わせた反射体壁を採用したので、計測対象の液体の種類が変わるたびに、中空部内や反射体壁をクリーニングしなければならず、メンテナンスが煩雑であった。
【００１６】
特許文献２の音響インピーダンスが水中の音響インピーダンスにほぼ等しい音波透過材が、底面に対する側面の傾き角が４５度の直円錐台の反射効率を最適化する材料であるとする根拠も希薄である。
【００１７】
本発明の目的は、メンテナンスが楽であり発振効率が良く寄生振動などが無い超音波送受信器を備え水位を水中から測定する水中超音波距離測定装置を提案することである。
【００１８】
【課題を解決するための手段】
本発明は、上記目的を達成するために、遮音板を挟んで平板の超音波発振素子および平板の超音波受信素子を張り合わせ前記平板への垂線が測定対象物の存在方向に直交して配置される超音波送受信器と、中心に配置された前記超音波送受信器の送受信方向を前記測定対象物の方向に転換するために反射面の傾き角が４５度に形成され中心線が前記測定対象物に向かって設置される錐台形状の反射板と、前記錐台形状の反射板の上端を密閉する防水共鳴膜とからなる超音波距離測定器を備え、水位を水中から測定する超音波距離測定装置を提案する。
【００１９】
前記錐台形状の反射板は、円錐台形状または角錐台形状とする。
【００２０】
本発明においては、錐台形状の反射板の上端を密閉して超音波に共鳴する防水共鳴膜で覆ったので、海水などの液体が反射体壁よりも内部には入り込まない。したがって、計測対象の液体の種類が変わっても、クリーニングやメンテナンスが楽である。
【００２１】
また、平板の超音波発振素子および平板の超音波受信素子の周りにモールド樹脂が接触していないために、発振効率が低下したり、寄生振動が生じたりするおそれがない。
【００２２】
【発明の実施の形態】
次に、図３および図４を参照して、本発明による超音波距離測定装置の実施形態を説明する。
【００２３】
図３は、水中から水位を測定する本発明による超音波距離測定装置の実施形態の系統構成を示す図、図４は、その主要部である超音波距離測定器の構造を示す図である。
【００２４】
本実施形態において、水中に上向きに設置された超音波距離測定器１は、信号ケーブル２により信号変換器３に接続されている。信号変換器３は、信号ケーブル４によりここでは図示していない計測データ処理手段に接続されている。
【００２５】
上向きに設置される超音波距離測定器１の超音波送受信器は、遮音板６を挟んで平板の超音波発振素子７および平板の超音波受信素子８を張り合わせ、平板への垂線すなわち超音波発振／受信方向が測定対象物すなわち水面１３の存在方向（上下方向）に直交して水平になるように配置される。
【００２６】
超音波送受信器１は、超音波送受信器の水平に向いている送信超音波１０と受信超音波１１との方向を前記測定対象物の方向すなわち水面１３に向かう鉛直方向に転換するために、反射面の傾き角が４５度に形成された錐台形状の反射板９を備えている。
【００２７】
錐台形状の反射板９は、円錐台形状または角錐台形状のいずれでもよい。錐台形状の反射板９の上端には、内部を密閉する防水共鳴膜１２を取り付けてある。
【００２８】
水位の計測に際して、信号変換器３は、図示しない計測データ処理手段からの超音波発振指令に基づいて、超音波発振素子７を発振させて、超音波を出力させる。
【００２９】
超音波発振素子７から水平方向に出力された送信超音波１０は、反射板９の４５度斜面で反射され、防水共鳴膜１２を振動させ、上方に位置する水面１３に向かう。
【００３０】
水面で反射した受信超音波１１は、防水共鳴膜１２を振動させ、反射板９の４５度斜面で反射され、水平方向に向かい、超音波受信素子８に取り込まれる。超音波受信素子８で検出された反射信号は、信号変換器３を介して、図示しない計測データ処理手段に送られる。
【００３１】
計測データ処理手段は、発信から受信までの時間差を演算し、時間差を水面までの距離すなわち水位に変換する。
【００３２】
このような超音波水位計は、超音波送受信器を水中に設置するので、水面上設置スペースが無くとも、超音波水位計を設置できる。水位を計測する水面上に構造物などがある設備においても、超音波水位計を設置可能となる。
【００３３】
錐台形状の反射板の上端を密閉して超音波に共鳴する防水共鳴膜で覆ったので、海水などの液体が反射体壁よりも内部には入り込まない。したがって、計測対象の液体の種類が変わっても、クリーニングやメンテナンスが楽である。
【００３４】
また、平板の超音波発振素子および平板の超音波受信素子の周りにモールド樹脂が接触していないために、発振効率が低下したり、寄生振動が生じたりするおそれがない。
【００３５】
【発明の効果】
本発明によれば、メンテナンスが楽であり発振効率が良く寄生振動などが無い超音波送受信器を備え水位を水中から測定する水中超音波距離測定装置が得られる。
【図面の簡単な説明】
【図１】水面上から水位を測定する従来の超音波距離測定装置の系統構成を示す図である。
【図２】従来の超音波距離測定装置の主要部である超音波距離測定器の構造を示す図である。
【図３】水中から水位を測定する本発明による超音波距離測定装置の実施形態の系統構成を示す図である。
【図４】本発明による超音波距離測定装置の実施形態の主要部である超音波距離測定器の構造を示す図である。
【符号の説明】
１ 超音波送受信器
２ 信号ケーブル
３ 信号変換器
４ 信号ケーブル
５ 超音波
６ 遮音板
７ 平板の超音波発振素子
８ 平板の超音波受信素子
９ 反射板
１０ 送信超音波
１１ 受信超音波
１２ 防水共鳴膜
１３ 測定対象物（水面）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ultrasonic distance measuring device, and more particularly to a water level measuring unit in a case where there is no space for installing an ultrasonic transceiver on the water surface.
[0002]
[Prior art]
FIG. 1 is a diagram showing a system configuration of a conventional ultrasonic distance measuring device for measuring a water level from the water surface, and FIG. 2 is a diagram showing a structure of an ultrasonic distance measuring device which is a main part thereof.
[0003]
The ultrasonic distance measuring device 1 installed on the water surface 13 is connected to a signal converter 3 by a signal cable 2. The signal converter 3 is connected by a signal cable 4 to measurement data processing means (not shown).
[0004]
The ultrasonic transmitter / receiver of the ultrasonic distance measuring device 1 has a flat ultrasonic oscillation element 7 and a flat ultrasonic receiving element 8 bonded together with the sound insulating plate 6 interposed therebetween, and measures the perpendicular to the flat plate, that is, the ultrasonic oscillation / reception direction. It is arranged so as to be horizontal in a direction perpendicular to the direction in which the object, that is, the water surface (up-down direction).
[0005]
The ultrasonic transmitter / receiver 1 performs reflection to change the direction of the transmission ultrasonic wave 10 and the reception ultrasonic wave 11 of the ultrasonic transmitter / receiver directed horizontally to the direction of the measurement object, that is, the vertical direction toward the water surface 13. A frustum-shaped reflector 9 having a surface inclination angle of 45 degrees is provided.
[0006]
When measuring the water level, the signal converter 3 causes the ultrasonic oscillation element 7 to oscillate and output ultrasonic waves based on an ultrasonic oscillation command from a measurement data processing means (not shown).
[0007]
The transmission ultrasonic wave 10 output from the ultrasonic oscillation element 7 in the horizontal direction is reflected by the 45-degree slope of the reflection plate 9 and travels to the water surface 13 located below.
[0008]
The received ultrasonic wave 11 reflected on the water surface 13 is reflected on the 45-degree slope of the reflecting plate 9 and is taken in the ultrasonic receiving element 8 in the horizontal direction. The reflection signal detected by the ultrasonic receiving element 8 is sent to measurement data processing means (not shown) via the signal converter 3.
[0009]
The measurement data processing means calculates a time difference from transmission to reception, and converts the time difference into a distance to a water surface, that is, a water level.
[0010]
Since such an ultrasonic water level gauge installs an ultrasonic transceiver on the water surface, it requires a certain amount of space on the water surface, and if the required space cannot be obtained, the ultrasonic water level meter could not be installed. . In a facility having a structure or the like on the water surface for measuring the water level, there was no space for installing an ultrasonic transceiver.
[0011]
On the other hand, if the conventional ultrasonic transmitter / receiver is installed in water as it is, problems such as damage due to flooding have occurred. Further, when the disc-shaped ceramic vibrator is installed horizontally, it is necessary to increase the diameter of the ceramic vibrator in order to improve the directivity, and it has been difficult to reduce the size of the ultrasonic transceiver.
[0012]
Therefore, in order to achieve watertightness and downsizing, a silencing material is filled into the inner surface of the cylindrical ceramic vibrator, and the cylindrical ceramic vibrator, the silencing material, and their supporting members are solidified with a filler such as a mold resin. A structure in which an inverted funnel-shaped reflector wall made of a metal plate, plastic, or the like is provided on the outer periphery has been proposed (for example, see Patent Document 1).
[0013]
Furthermore, instead of a ferrite vibrator or a Langevin vibrator with larger dimensions before that, using a sound-transmitting material whose acoustic impedance is almost equal to the acoustic impedance in water, a right circular truncated cone with a 45 ° inclination angle of the side surface to the bottom surface is used. An ultrasonic transmitter / receiver in which a cylindrical vibrator is formed and arranged in the center of a truncated cone is also proposed (for example, see Patent Document 2).
[0014]
[Patent Document 1]
JP-A-2001-166056 (pages 3 and 4, FIGS. 1, 2 and 3)
[Patent Document 2]
JP-A-58-225371 (pages 1-2, FIG. 2)
[0015]
[Problems to be solved by the invention]
However, the ultrasonic transmitter / receiver disclosed in Patent Document 1 has no description of the study result regarding the transmission of ultrasonic waves in the mold resin, and is filled with the mold resin, so that the oscillation efficiency is reduced or parasitic vibration occurs. The problem is whether there is any fear. In addition, a reflector wall with a small hole through which liquid such as seawater enters the hollow, a reflector wall of a net, a reflector wall using armor-like plate pieces, and a reflector wall with scales superimposed were adopted. Every time the type of liquid to be measured changes, the inside of the hollow part and the reflector wall must be cleaned, and the maintenance is complicated.
[0016]
The grounds that the sound transmitting material whose acoustic impedance is almost equal to the acoustic impedance in water of Patent Document 2 is a material that optimizes the reflection efficiency of a truncated right circular cone having a side surface inclination angle of 45 degrees with respect to the bottom surface are also sparse.
[0017]
It is an object of the present invention to provide an underwater ultrasonic distance measuring apparatus that includes an ultrasonic transceiver that is easy to maintain, has high oscillation efficiency, and is free from parasitic vibrations, and that measures a water level from underwater.
[0018]
[Means for Solving the Problems]
The present invention, in order to achieve the above object, a flat ultrasonic oscillation element and a flat ultrasonic receiving element are attached to each other with a sound insulating plate interposed therebetween, and a perpendicular to the flat plate is arranged perpendicular to the direction in which the object to be measured exists. An ultrasonic transmitter / receiver, and in order to change the transmission / reception direction of the ultrasonic transmitter / receiver disposed at the center to the direction of the object to be measured, the inclination angle of the reflecting surface is formed at 45 degrees, and the center line is the object to be measured. Provided with an ultrasonic distance measuring device comprising a frustum-shaped reflecting plate installed toward the front and a waterproof resonance membrane sealing the upper end of the frustum-shaped reflecting plate, and an ultrasonic distance measuring device for measuring the water level from underwater Suggest a device.
[0019]
The frustum-shaped reflecting plate has a truncated cone shape or a truncated pyramid shape.
[0020]
In the present invention, the upper end of the frustum-shaped reflector is sealed and covered with a waterproof resonance film that resonates with ultrasonic waves, so that liquid such as seawater does not enter the interior of the reflector wall. Therefore, even if the type of liquid to be measured changes, cleaning and maintenance are easy.
[0021]
Further, since the mold resin does not contact the flat ultrasonic wave oscillating element and the flat ultrasonic wave receiving element, there is no possibility that the oscillation efficiency is reduced or the parasitic vibration is generated.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of an ultrasonic distance measuring apparatus according to the present invention will be described with reference to FIGS.
[0023]
FIG. 3 is a diagram showing a system configuration of an embodiment of an ultrasonic distance measuring device for measuring a water level from underwater according to the present invention, and FIG. 4 is a diagram showing a structure of an ultrasonic distance measuring device which is a main part thereof.
[0024]
In the present embodiment, an ultrasonic distance measuring device 1 installed upward in water is connected to a signal converter 3 by a signal cable 2. The signal converter 3 is connected by a signal cable 4 to measurement data processing means (not shown).
[0025]
The ultrasonic transmitter / receiver of the ultrasonic distance measuring device 1 installed upwardly has a flat ultrasonic oscillation element 7 and a flat ultrasonic receiving element 8 bonded together with the sound insulating plate 6 interposed therebetween, and a perpendicular line to the flat plate, that is, ultrasonic oscillation. / The receiving direction is arranged so as to be horizontal and perpendicular to the direction in which the object to be measured, that is, the water surface 13 (up-down direction).
[0026]
The ultrasonic transmitter / receiver 1 performs reflection to change the direction of the transmission ultrasonic wave 10 and the reception ultrasonic wave 11 of the ultrasonic transmitter / receiver directed horizontally to the direction of the measurement object, that is, the vertical direction toward the water surface 13. A frustum-shaped reflector 9 having a surface inclination angle of 45 degrees is provided.
[0027]
The frustum-shaped reflector 9 may be either a truncated cone or a truncated pyramid. At the upper end of the frustum-shaped reflecting plate 9, a waterproof resonance film 12 for sealing the inside is attached.
[0028]
When measuring the water level, the signal converter 3 oscillates the ultrasonic oscillation element 7 based on an ultrasonic oscillation command from a measurement data processing means (not shown) to output ultrasonic waves.
[0029]
The transmission ultrasonic wave 10 output in the horizontal direction from the ultrasonic oscillation element 7 is reflected by the 45-degree slope of the reflection plate 9, vibrates the waterproof resonance film 12, and travels toward the water surface 13 located above.
[0030]
The received ultrasonic wave 11 reflected on the water surface vibrates the waterproof resonance film 12, is reflected on the 45-degree slope of the reflecting plate 9, travels in the horizontal direction, and is captured by the ultrasonic receiving element 8. The reflection signal detected by the ultrasonic receiving element 8 is sent to measurement data processing means (not shown) via the signal converter 3.
[0031]
The measurement data processing means calculates a time difference from transmission to reception, and converts the time difference into a distance to a water surface, that is, a water level.
[0032]
In such an ultrasonic water level gauge, the ultrasonic transceiver is installed in the water, so that the ultrasonic water level gauge can be installed even if there is no space on the water surface. An ultrasonic water level gauge can be installed even in a facility having a structure or the like on the water surface for measuring the water level.
[0033]
Since the upper end of the frustum-shaped reflector is sealed and covered with a waterproof resonance film that resonates with ultrasonic waves, liquid such as seawater does not enter the interior of the reflector wall. Therefore, even if the type of liquid to be measured changes, cleaning and maintenance are easy.
[0034]
In addition, since the mold resin does not contact the flat ultrasonic wave oscillating element and the flat ultrasonic wave receiving element, there is no possibility that the oscillation efficiency is reduced or the parasitic vibration is generated.
[0035]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the underwater ultrasonic distance measuring device which is equipped with the ultrasonic transceiver which is easy to maintain, has good oscillation efficiency, and does not have parasitic vibration etc., and measures a water level from underwater is obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a system configuration of a conventional ultrasonic distance measuring device for measuring a water level from above a water surface.
FIG. 2 is a diagram showing a structure of an ultrasonic distance measuring device which is a main part of a conventional ultrasonic distance measuring device.
FIG. 3 is a diagram showing a system configuration of an embodiment of an ultrasonic distance measuring device for measuring a water level from underwater according to the present invention.
FIG. 4 is a diagram showing a structure of an ultrasonic distance measuring device which is a main part of an embodiment of the ultrasonic distance measuring device according to the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 ultrasonic transmitter / receiver 2 signal cable 3 signal converter 4 signal cable 5 ultrasonic wave 6 sound insulation plate 7 flat ultrasonic oscillation element 8 flat ultrasonic reception element 9 reflection plate 10 transmission ultrasonic wave 11 reception ultrasonic wave 12 waterproof resonance film 13 Measurement object (water surface)

Claims (3)

遮音板を挟んで平板の超音波発振素子および平板の超音波受信素子を張り合わせ前記平板への垂線が測定対象物の存在方向に直交して配置される超音波送受信器と、
中心に配置された前記超音波送受信器の送受信方向を前記測定対象物の方向に転換するために反射面の傾き角が４５度に形成され中心線が前記測定対象物に向かって設置される錐台形状の反射板と、
前記錐台形状の反射板の上端を密閉する防水共鳴膜とからなる超音波距離測定器を備え、
水位を水中から測定する超音波距離測定装置。An ultrasonic transmitter / receiver in which a perpendicular line to the flat plate is attached orthogonally to the direction in which the object to be measured is placed by laminating a flat ultrasonic oscillation element and a flat ultrasonic receiving element with the sound insulating plate interposed therebetween,
In order to change the transmission / reception direction of the ultrasonic transmitter / receiver disposed at the center to the direction of the measurement target, the inclination angle of the reflection surface is formed at 45 degrees, and the center line is set toward the measurement target. A trapezoidal reflector,
An ultrasonic distance measuring device comprising a waterproof resonance film that seals the upper end of the frustum-shaped reflector,
An ultrasonic distance measuring device that measures the water level from underwater. 請求項１に記載の超音波距離測定装置において、
前記錐台形状の反射板が、円錐台形状であることを特徴とする超音波距離測定装置。The ultrasonic distance measuring device according to claim 1,
An ultrasonic distance measuring device, wherein the frustum-shaped reflector is frusto-conical. 請求項１に記載の超音波距離測定装置において、
前記錐台形状の反射板が、角錐台形状であることを特徴とする超音波距離測定装置。The ultrasonic distance measuring device according to claim 1,
An ultrasonic distance measuring apparatus, wherein the frustum-shaped reflecting plate has a truncated pyramid shape.
JP2003063827A 2003-03-10 2003-03-10 Ultrasonic distance measuring system Pending JP2004271390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003063827A JP2004271390A (en) 2003-03-10 2003-03-10 Ultrasonic distance measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003063827A JP2004271390A (en) 2003-03-10 2003-03-10 Ultrasonic distance measuring system

Publications (1)

Publication Number Publication Date
JP2004271390A true JP2004271390A (en) 2004-09-30

Family

ID=33125311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003063827A Pending JP2004271390A (en) 2003-03-10 2003-03-10 Ultrasonic distance measuring system

Country Status (1)

Country Link
JP (1) JP2004271390A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011089685A1 (en) 2011-12-22 2013-06-27 Continental Automotive Gmbh Measuring arrangement for determining level and/or concentration of e.g. oil in oil tank mounted in motor car, has deflection device whose interface is formed on prism shaped element in which sound waves are propagated and impinged
DE102019109215A1 (en) * 2019-04-08 2020-10-08 Kautex Textron Gmbh & Co. Kg Operating fluid container with ultrasonic level sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011089685A1 (en) 2011-12-22 2013-06-27 Continental Automotive Gmbh Measuring arrangement for determining level and/or concentration of e.g. oil in oil tank mounted in motor car, has deflection device whose interface is formed on prism shaped element in which sound waves are propagated and impinged
DE102011089685B4 (en) 2011-12-22 2018-09-27 Continental Automotive Gmbh Measuring arrangement for determining a fill level and / or a concentration of a liquid
DE102019109215A1 (en) * 2019-04-08 2020-10-08 Kautex Textron Gmbh & Co. Kg Operating fluid container with ultrasonic level sensor

Similar Documents

Publication Publication Date Title
CN102662166B (en) Multimode broadband circular array transducer
US8085621B2 (en) Ultrasonic transducer with improved method of beam angle control
CN101543095B (en) Ultrasonic transducer
JP2005504979A (en) Liquid level measuring device
US7388810B2 (en) Ultrasonic distance measurement system
JP2960726B2 (en) Device for measuring and / or monitoring the filling level
US11029190B2 (en) Velocity sensor with parabolic reflector
CN102405653A (en) Ultrasonic probe and ultrasonic imaging apparatus
JP2008232801A (en) Ultrasonic transducer and ultrasonic level gage
WO2012060046A1 (en) Electronic equipment
JP2004271390A (en) Ultrasonic distance measuring system
US2823365A (en) Electro-acoustic system and method
CN211042411U (en) Ultrasonic liquid level monitoring device for septic tank and septic tank
CN110523608B (en) Integrated double-frequency transducer
RU105554U1 (en) MODULAR HYDROACOUSTIC ANTENNA
CN211217400U (en) Integrated double-frequency transducer
CN101634587B (en) Three-dimensional co-vibrating sandwich-type sonar receiver
CN211554310U (en) Ultrasonic sensor module
EP2949404A2 (en) An electroacoustic transducer
JP4771575B2 (en) Underwater detector
GB2542919A (en) An electroacoustic transducer device
JP3528491B2 (en) Ultrasonic transducer
JP2004233064A (en) Ultrasonic wave transmitter-receiver
JP2001166056A (en) Wave transmitting and receiving device for water ultrasonic wave using ringlike ceramic
US2749436A (en) Sonobuoy