JP2007198738A

JP2007198738A - Underwater wave receiver and sonar equipped with the same underwater wave receiver

Info

Publication number: JP2007198738A
Application number: JP2006013961A
Authority: JP
Inventors: Akiyoshi Kawamori; 章好河守
Original assignee: Oki Electric Industry Co Ltd
Current assignee: Oki Electric Industry Co Ltd
Priority date: 2006-01-23
Filing date: 2006-01-23
Publication date: 2007-08-09

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater wave receiver for shortening time to find inadequate water tightness caused by infiltration of water from an end part of an adhesion boundary face between a housing and an insulation coating of a cable. <P>SOLUTION: This underwater wave receiver is equipped with a wave reception element 1 connected to the conductors of the cable for converting sound pressure into an electrical signal, the housing 6 for therein housing an end part of the cable and the reception element 1 in a water-tight state, and a conductor member 5 disposed on the adhesion boundary face between the housing 6 and the insulation coating 4 of the cable and connected to the conductors of the cable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、水中受波器に関し、特に、水密不良の検出に関するものである。 The present invention relates to an underwater receiver, and more particularly to detection of poor watertightness.

従来の水中受波器は、例えば「音響電気変換素子である高分子圧電材を常温硬化ウレタンゴムで覆い、更に耐水性良好な外被ゴムで被覆したことを特徴とする受波器の防水構造。」が提案されている（例えば、特許文献１参照）。 A conventional underwater receiver is, for example, “a waterproof structure for a receiver characterized in that a polymer piezoelectric material, which is an acoustoelectric conversion element, is covered with a room temperature curing urethane rubber and further covered with a jacket rubber having good water resistance. Is proposed (for example, see Patent Document 1).

特開平６−１６５２８２号公報（請求項１、第１図）JP-A-6-165282 (Claim 1, FIG. 1)

しかしながら、従来の水中受波器には、次の問題点がある。
ケーブルと受波素子のハウジングにおいては、ケーブルの絶縁被覆とハウジングのモールド材又はゴムブーツ材等との界面が存在し、互いが密着して水密が保たれている。密着強度は量産した場合にどうしてもバラツキがでるものであり、初期不良を排除するために、耐水圧試験や温水浸漬試験などの初期不良排除試験を実施するが、仮に密着部の端面に剥離が生じても、そこから受波素子とケーブル導体の接続部まで水分が浸透するには長い時間が必要なため、短期間の初期不良排除試験では必ずしも密着界面の水密不良を検出できない、という問題点があった。 However, the conventional underwater receiver has the following problems.
In the housing of the cable and the wave receiving element, there is an interface between the insulation coating of the cable and the molding material or rubber boot material of the housing, and the water tightness is maintained by close contact with each other. Adhesion strength will inevitably vary when mass-produced, and in order to eliminate initial defects, initial defect elimination tests such as a water pressure resistance test and a hot water immersion test are performed. However, since it takes a long time for moisture to penetrate from there to the connection between the receiving element and the cable conductor, a short-term initial defect elimination test cannot always detect a water tight defect at the adhesion interface. there were.

また、初期不良排除試験で密着部の剥離による水分の浸透が進行中の水密不良が検出できない場合に、水中受波器をソナーとして高水圧下である水深の深い海中で実際に使用した際、水分が受波素子とケーブル導体の接続部に到達し機能不良となる可能性が高くなる、という問題点があった。 In addition, when water penetration failure due to moisture penetration due to peeling of the close contact portion cannot be detected in the initial failure exclusion test, when the underwater receiver is actually used in a deep sea under high water pressure as a sonar, There is a problem that the possibility of moisture reaching the connection portion between the wave receiving element and the cable conductor and causing malfunction becomes high.

本発明に係る水中受波器は、ケーブルの導体に接続され、音圧を電気信号に変換する受波素子と、ケーブルの端部及び受波素子を水密状態で収納するハウジングと、ハウジングとケーブルの絶縁被覆との密着界面に配置され、ケーブルの導体と接続される導体部材とを備えたものである。 An underwater wave receiver according to the present invention includes a wave receiving element that is connected to a conductor of a cable and converts sound pressure into an electric signal, a housing that houses the end of the cable and the wave receiving element in a watertight state, and the housing and the cable. And a conductor member connected to the conductor of the cable.

また、本発明に係るソナーは、請求項１又は請求項２に記載の水中受波器を備えたものである。 A sonar according to the present invention includes the underwater receiver according to claim 1 or claim 2.

本発明は、ハウジングとケーブルの絶縁被覆との密着界面に配置され、ケーブルの導体に接続される導体部材を備えたことにより、密着界面端部からの水分の浸透による水密不良の発見時間を短縮することができる。 The present invention includes a conductor member that is arranged at the close contact interface between the housing and the insulation coating of the cable and is connected to the conductor of the cable, thereby shortening the detection time of watertight failure due to moisture permeation from the end of the close contact interface. can do.

実施の形態１．
図１は本発明の実施の形態１における受波素子と導体部材のケーブル結線を示す図、図２は本発明の実施の形態１における導体部材の配置を示す図である。図において、受波素子１は、音圧が印可されると様々な変形が生じ、電気信号を誘発する機械・電気変換材料である。ケーブル導体２及びシールド線３は受波素子１と接続され、受波素子１からの電気信号を伝送し、受波素子１の電気信号を受信機等に入力する。また、受波素子１は＋，−，アース線の配線を有し、受波素子１とケーブル導体２の＋，−とがそれぞれ接続され、さらに、電気信号を安定させると共に外部からの浮遊雑音がカットするため、受波素子１からの電気信号を受け取る受信機等のアース（０Ｖ）と、受波素子１が出力する電気信号の０Ｖとが一致するよう、受信機等のアース端子が接続されたシールド線３と受波素子１のアース線とが接続される。尚、必要により、受波素子１とケーブル導体２の＋配線，−配線のみを接続し、受波素子１のアース線とシールド線３とを接続しなくても良い。ケーブル被覆４は、耐水性材質でありケーブル導体２及びシールド線３を絶縁被覆する。導体部材５は、導電性材質によりケーブル端部のケーブル被覆４の外周部に環状に形成され、受波素子１のアース線及びケーブルのシールド線３と接続される。ハウジング６は、ゴムモールド、ウレタンモールド、又は、ゴムブーツとゴムブーツ内部を音響油で満たすことにより構成され、受波素子１と、ケーブル導体２及びシールド線３の配線接続部、導体部材５を収納し、ケーブル被覆４と密着して形成される密着界面により水密状態に保つようにハウジングされる。尚、ハウジング６の材質、構成はこれに限らず、他の材質、構成を用いても良い。 Embodiment 1 FIG.
FIG. 1 is a diagram showing a cable connection between a wave receiving element and a conductor member according to Embodiment 1 of the present invention, and FIG. 2 is a diagram showing an arrangement of conductor members according to Embodiment 1 of the present invention. In the figure, the wave receiving element 1 is a mechanical / electrical conversion material that undergoes various deformations when a sound pressure is applied and induces an electric signal. The cable conductor 2 and the shield line 3 are connected to the wave receiving element 1, transmit an electric signal from the wave receiving element 1, and input the electric signal of the wave receiving element 1 to a receiver or the like. The wave receiving element 1 has wirings of +, −, and ground wires, and the wave receiving element 1 and the cable conductor 2 are connected to + and −, respectively, and further stabilize the electric signal and stray noise from the outside. Therefore, the ground terminal of the receiver, etc., is connected so that the ground (0V) of the receiver that receives the electrical signal from the receiving element 1 and the electrical signal 0V output from the receiving element 1 match. The shielded wire 3 and the ground wire of the wave receiving element 1 are connected. If necessary, only the + wiring and the −wiring of the wave receiving element 1 and the cable conductor 2 may be connected, and the ground line and the shield line 3 of the wave receiving element 1 may not be connected. The cable covering 4 is a water-resistant material and insulates the cable conductor 2 and the shield wire 3. The conductor member 5 is formed in an annular shape on the outer periphery of the cable sheath 4 at the end of the cable with a conductive material, and is connected to the ground wire of the wave receiving element 1 and the shield wire 3 of the cable. The housing 6 is configured by filling a rubber mold, a urethane mold, or a rubber boot and the inside of the rubber boot with acoustic oil, and houses the wave receiving element 1, the wiring connection portion of the cable conductor 2 and the shield wire 3, and the conductor member 5. The housing is maintained so as to be kept in a watertight state by a close contact interface formed in close contact with the cable sheath 4. The material and configuration of the housing 6 are not limited to this, and other materials and configurations may be used.

次に水密不良の検出について説明する。
水中受波器の水密不良の検出は、耐水圧試験や温水浸漬試験等を行い、水中受波器を水中に配置し、ケーブル導体２の＋，−及びシールド線３の各配線間、及び、各配線と水との間の絶縁抵抗を計測し、絶縁抵抗値が規定値を下回ったときには水分が浸透している、即ち、ハウジングの水密不良と判断する。図２に示すように、ケーブル被覆４とハウジング６との密着界面端部より水分の浸透があった場合、密着界面端部から導体部材５までの距離である水密不良発見距離だけ水分が浸透したとき、導体部材５が接続されるシールド線３と水との絶縁抵抗が低下し、水密不良が検出される。 Next, detection of watertight failure will be described.
Detection of watertight failure of the underwater receiver is performed by performing a water pressure resistance test, a hot water immersion test, etc., placing the underwater receiver in water, between the + and-of the cable conductor 2 and the shielded wire 3 and The insulation resistance between each wiring and water is measured, and when the insulation resistance value falls below a specified value, it is determined that moisture has penetrated, that is, the housing is not watertight. As shown in FIG. 2, when water permeates from the end portion of the close contact interface between the cable sheath 4 and the housing 6, the water permeates through a watertight defect detection distance that is a distance from the close contact interface end portion to the conductor member 5. At this time, the insulation resistance between the shield wire 3 to which the conductor member 5 is connected and water is lowered, and a watertight defect is detected.

以上のように、本実施の形態１においては、導体部材５をケーブル被覆４とハウジング６との密着界面に配置したことにより、密着界面端部からの水分の浸透を検出する間での浸透距離が短くなり、水密不良発見までの時間を短縮することができる。また、初期不良排除試験において密着部の剥離による水分の浸透が進行中の水密不良が検出できる可能性が高まり、水中受波器をソナーとして高水圧下である水深の深い海中で実際に使用した際、水分が受波素子とケーブル導体の接続部に到達し機能不良となる可能性が低くなる。 As described above, in the first embodiment, the conductive member 5 is arranged at the close contact interface between the cable sheath 4 and the housing 6, so that the permeation distance during the detection of the permeation of moisture from the close contact interface end portion. Can be shortened, and the time until the detection of watertight failure can be shortened. In addition, in the initial failure exclusion test, the possibility of detecting water tightness failure during the penetration of moisture due to peeling of the close contact portion increased, and the underwater receiver was actually used as a sonar in a deep sea with high water pressure. At this time, the possibility that moisture reaches the connection portion between the wave receiving element and the cable conductor and malfunctions becomes low.

尚、上記説明では、導体部材５とシールド線３とを接続する場合を説明したが、本発明はこれに限るものではなく、導体部材５とケーブル導体２の＋配線又は−配線とを接続しても良い。 In the above description, the case where the conductor member 5 and the shield wire 3 are connected has been described. However, the present invention is not limited to this, and the conductor member 5 and the + wiring or the −wiring of the cable conductor 2 are connected. May be.

尚、上記説明では、導体部材５はケーブル被覆４の外周部に環状に形成した場合を説明したが、本発明はこれに限るものではなく、密着界面に配置する任意の形状の導体部材５を用いても良い。 In the above description, the conductor member 5 is described as being formed in an annular shape on the outer periphery of the cable sheath 4, but the present invention is not limited to this, and the conductor member 5 having an arbitrary shape disposed at the close contact interface is used. It may be used.

実施の形態２．
図３は本発明の実施の形態２における水中受波器を備えたソナーの構成を示す図である。図において、水中受波器１０は、高水圧下である水深の深い海中に配置される本発明に係る水中受波器、ケーブル１１は、水中受波器１０の電気信号を伝送するケーブル、受信機１２は、海上の船などに配置され、水中受波器１０の電気信号を受信する受信機である。このように、本実施の形態２におけるソナーは、本発明に係る水中受波器１０を備えることにより、水分が水中受波器１０内部に浸透し機能不良となる可能性が低くなる。 Embodiment 2. FIG.
FIG. 3 is a diagram showing a configuration of a sonar provided with an underwater receiver in the second embodiment of the present invention. In the figure, an underwater receiver 10 is disposed in the deep sea under high water pressure, and an underwater receiver according to the present invention, a cable 11 is a cable for transmitting an electrical signal of the underwater receiver 10, receiving The machine 12 is a receiver that is disposed on a ship at sea and receives the electrical signal of the underwater receiver 10. As described above, the sonar according to the second embodiment includes the underwater receiver 10 according to the present invention, so that the possibility of moisture penetrating into the underwater receiver 10 and malfunctioning is reduced.

本発明の実施の形態１における受波素子と導体部材のケーブル結線を示す図である。It is a figure which shows the cable connection of the wave receiving element and conductor member in Embodiment 1 of this invention. 本発明の実施の形態１における導体部材の配置を示す図である。It is a figure which shows arrangement | positioning of the conductor member in Embodiment 1 of this invention. 本発明の実施の形態２における水中受波器を備えたソナーの構成を示す図である。It is a figure which shows the structure of the sonar provided with the underwater receiver in Embodiment 2 of this invention.

Explanation of symbols

１受波素子、２ケーブル導体、３シールド線、４ケーブル被覆、５導体部材、６ハウジング、１０水中受波器、１１ケーブル、１２受信機。
1 receiving element, 2 cable conductor, 3 shielded wire, 4 cable covering, 5 conductor member, 6 housing, 10 underwater receiver, 11 cable, 12 receiver.

Claims

A receiving element that is connected to the conductor of the cable and converts sound pressure into an electrical signal;
A housing for storing the end of the cable and the receiving element in a watertight state;
An underwater wave receiver comprising: a conductor member disposed at a close contact interface between the housing and the insulation coating of the cable and connected to a conductor of the cable.

The underwater receiver according to claim 1, wherein the conductor member is formed in an annular shape on an outer peripheral portion of the insulating coating of the cable.

A sonar comprising the underwater receiver according to claim 1.