JP6233651B2 - Vehicle collision detection device - Google Patents

Vehicle collision detection device Download PDF

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JP6233651B2
JP6233651B2 JP2014125588A JP2014125588A JP6233651B2 JP 6233651 B2 JP6233651 B2 JP 6233651B2 JP 2014125588 A JP2014125588 A JP 2014125588A JP 2014125588 A JP2014125588 A JP 2014125588A JP 6233651 B2 JP6233651 B2 JP 6233651B2
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vehicle
tube member
detection tube
detection
groove
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JP2016002939A (en
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皓太 天野
皓太 天野
田辺　貴敏
貴敏 田辺
往広 斉藤
往広 斉藤
大祐 中根
大祐 中根
吉田　智一
智一 吉田
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Denso Corp
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Denso Corp
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Priority to JP2014125588A priority Critical patent/JP6233651B2/en
Priority to PCT/JP2015/002859 priority patent/WO2015194121A1/en
Priority to DE112015002888.9T priority patent/DE112015002888T5/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Description

本発明は、車両の衝突事故の発生を正確に検知可能な車両用衝突検知装置に関する。   The present invention relates to a vehicle collision detection device that can accurately detect the occurrence of a vehicle collision accident.

従来、歩行者が車両に衝突した際、歩行者への衝撃を軽減するための歩行者保護装置を備えた車両がある。この車両では、バンパ部にセンサを備えた衝突検知装置を設け、このセンサにより車両に歩行者などが衝突したことが検知された場合、歩行者保護装置を作動させ、歩行者への衝撃を和らげる構成となっている。この歩行者保護装置には、例えばポップアップフードと呼ばれるものがある。このポップアップフードは、車両の衝突検知時に、エンジンフードの後端を上昇させ、歩行者とエンジンなどの硬い部品との間隔（クリアランス）を増加させ、そのスペースを用いて歩行者の頭部への衝突エネルギーを吸収し、頭部への衝撃を低減させるものである。   Conventionally, there is a vehicle including a pedestrian protection device for reducing an impact on a pedestrian when the pedestrian collides with the vehicle. In this vehicle, a bumper unit is provided with a collision detection device, and when this sensor detects that a pedestrian or the like has collided with the vehicle, the pedestrian protection device is activated to reduce the impact on the pedestrian. It has a configuration. This pedestrian protection device includes what is called a pop-up hood, for example. This pop-up hood raises the rear end of the engine hood when a vehicle collision is detected, increases the clearance (clearance) between the pedestrian and hard parts such as the engine, and uses that space to the pedestrian's head. It absorbs collision energy and reduces the impact on the head.

上記した車両用衝突検知装置には、車両のバンパ内におけるバンパレインフォースメントの前面に、チャンバ空間を内部に有するチャンバ部材を配設し、このチャンバ空間内の圧力を圧力センサにより検出するようにしたものがある。この構成のものでは、バンパ（バンパカバー）へ物体（歩行者など）が衝突すると、バンパカバーの変形に伴ってチャンバ部材が変形し、チャンバ空間に圧力変化が発生する。この圧力変化を圧力センサが検出することで歩行者の衝突を検知している。   In the above-described vehicle collision detection device, a chamber member having a chamber space is disposed in front of a bumper reinforcement in a bumper of the vehicle, and a pressure sensor detects the pressure in the chamber space. There is what I did. With this configuration, when an object (pedestrian or the like) collides with the bumper (bumper cover), the chamber member is deformed along with the deformation of the bumper cover, and a pressure change is generated in the chamber space. The pressure sensor detects this pressure change to detect a pedestrian collision.

近年、上記したチャンバ式の車両用衝突検知装置よりも、小型で搭載性に優れたチューブ部材を用いて衝突を検知するチューブ式の車両用衝突検知装置が提案されている。この車両用衝突検知装置は、車両のバンパ内に配設された衝撃吸収用部材であるバンパアブソーバと、バンパアブソーバに車幅方向に沿って形成された溝部に装着される中空のチューブ部材と、チューブ部材内の圧力を検出する圧力センサとを備えて構成されている。そして、車両前方に歩行者などが衝突した際には、バンパアブソーバが衝撃を吸収しながら変形すると同時にチューブ部材も変形する。このとき、チューブ部材内の圧力が上昇し、この圧力変化を圧力センサにより検出することに基づいて、車両と歩行者との衝突を検知する。   In recent years, a tube-type vehicle collision detection device that detects a collision using a tube member that is smaller and more easily mounted than the chamber-type vehicle collision detection device has been proposed. The vehicle collision detection device includes a bumper absorber that is a shock absorbing member disposed in a bumper of the vehicle, a hollow tube member that is mounted in a groove formed in the bumper absorber along the vehicle width direction, And a pressure sensor for detecting the pressure in the tube member. When a pedestrian or the like collides with the front of the vehicle, the bumper absorber is deformed while absorbing the impact, and at the same time, the tube member is also deformed. At this time, the pressure in the tube member rises, and the collision between the vehicle and the pedestrian is detected based on detecting the pressure change by the pressure sensor.

独国実用新案第２０１１１０５８６７号明細書German Utility Model No. 2011105867

しかしながら、上記した構成の車両用衝突検知装置では、衝撃吸収用部材であるバンパアブソーバが発砲部材などから形成されているので、このバンパアブソーバに溝部を設ける際に寸法公差などが生じる。このため、溝部内にチューブ部材を装着した際に、当該溝部内における検出用チューブ部材の車両前方側または後方側に形成される隙間にばらつきが生じる。これにより、歩行者との衝突時におけるチューブ部材の変形量、すなわち圧力センサによる圧力検出結果が車幅方向においてばらつくことで、衝突検知精度が低下するという問題がある。   However, in the vehicle collision detection device having the above-described configuration, the bumper absorber, which is a shock absorbing member, is formed from a foaming member or the like, and therefore a dimensional tolerance or the like occurs when a groove is provided in the bumper absorber. For this reason, when the tube member is mounted in the groove portion, the gap formed on the vehicle front side or the rear side of the detection tube member in the groove portion varies. As a result, there is a problem in that the collision detection accuracy decreases because the deformation amount of the tube member at the time of collision with the pedestrian, that is, the pressure detection result by the pressure sensor varies in the vehicle width direction.

本発明は、上述した問題点に鑑みてなされたものであり、バンパアブソーバに形成された溝部内における検出用チューブ部材の車両前方側または後方側に形成される隙間を小さくして衝突検知精度を向上させた車両用衝突検知装置を提供することを目的とする。   The present invention has been made in view of the above-described problems, and reduces the gap formed on the front side or the rear side of the tube member for detection in the groove portion formed in the bumper absorber, thereby improving the collision detection accuracy. An object of the present invention is to provide an improved vehicle collision detection device.

上記目的を解決するためになされた請求項１に記載の車両用衝突検知装置（１）は、車両のバンパ（７）内に配設された衝撃吸収用部材であるバンパアブソーバ（２）と、バンパアブソーバに車幅方向に沿って形成された溝部（２ａ）に装着されると共にバンパレインフォースメント（９）の車両前方側に配設される内部に中空部（３ａ）が形成された検出用チューブ部材（３）と、検出用チューブ部材の中空部内の圧力を検出する圧力センサ（４）とを有し、圧力センサによる圧力検出結果に基づいてバンパへの物体の衝突を検知する。そして、溝部内における検出用チューブ部材の車両前方側及び／又は後方側に形成される隙間に充填される充填部材（５，５１，５２）を備えたことを特徴とする。   The vehicle collision detection device (1) according to claim 1, which is made to solve the above-described object, includes a bumper absorber (2) which is a shock absorbing member disposed in a bumper (7) of the vehicle, A detection part in which a hollow part (3a) is formed inside a bumper reinforcement (9) that is mounted in a groove part (2a) formed in the bumper absorber along the vehicle width direction and disposed on the front side of the bumper reinforcement (9). It has a tube member (3) and a pressure sensor (4) for detecting the pressure in the hollow portion of the detection tube member, and detects the collision of an object with the bumper based on the pressure detection result by the pressure sensor. And it has the filling member (5, 51, 52) with which the clearance gap formed in the vehicle front side and / or back side of the tube member for a detection in a groove part is provided.

この構成によれば、バンパアブソーバに形成された溝部に充填部材を設けることによって、溝部内における検出用チューブ部材の車両前方側及び／又は後方側に形成される隙間のばらつきを小さくすることができる。これにより、車両と歩行者との衝突時におけるチューブ部材の変形量が車幅方向においてばらつくことを防ぐことができ、車両用衝突検知装置の衝突検知精度を向上させることができる。なお、この欄及び特許請求の範囲で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   According to this configuration, by providing the filling member in the groove formed in the bumper absorber, it is possible to reduce the variation in the gap formed on the vehicle front side and / or the rear side of the detection tube member in the groove. . Thereby, the deformation amount of the tube member at the time of the collision between the vehicle and the pedestrian can be prevented from varying in the vehicle width direction, and the collision detection accuracy of the vehicle collision detection device can be improved. In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

本発明の第１の実施形態の車両用衝突検知装置の全体構成を示す図である。1 is a diagram illustrating an overall configuration of a vehicle collision detection device according to a first embodiment of the present invention. 図１のバンパ部の拡大図である。It is an enlarged view of the bumper part of FIG. 図１のバンパ部の横断面図である。It is a cross-sectional view of the bumper part of FIG. 図３のバンパアブソーバの溝部の拡大断面図である。It is an expanded sectional view of the groove part of the bumper absorber of FIG. 圧力センサの内部構造を示す断面図である。It is sectional drawing which shows the internal structure of a pressure sensor. 第２の実施形態における図４相当図である。FIG. 5 is a diagram corresponding to FIG. 4 in the second embodiment. 図６の検出用チューブ部材の装着方法を示す図である。It is a figure which shows the mounting method of the tube member for a detection of FIG. 検出用チューブ部材の配置構造の変形例を示す断面図である。It is sectional drawing which shows the modification of the arrangement structure of the tube member for a detection. 第３の実施形態における図４相当図である。FIG. 5 is a diagram corresponding to FIG. 4 in a third embodiment. 図９の検出用チューブ部材の装着方法を示す図である。It is a figure which shows the mounting method of the tube member for a detection of FIG.

［第１の実施形態］
以下、本発明の第１の実施形態の車両用衝突検知装置について、図１〜図５を参照して説明する。図１〜図４に示すように、本実施形態の車両用衝突検知装置１は、衝撃吸収用部材であるバンパアブソーバ２、中空の検出用チューブ部材３、圧力センサ４、充填部材５、衝突検知ＥＣＵ６などを備えて構成されている。この車両用衝突検知装置１は、車両前方に設けられたバンパ７への物体（歩行者など）の衝突を検知するものである。このバンパ７は、図３に示すように、バンパカバー８、バンパアブソーバ２、バンパレインフォースメント９を主体として構成されている。 [First Embodiment]
Hereinafter, a vehicle collision detection apparatus according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 4, the vehicle collision detection apparatus 1 of the present embodiment includes a bumper absorber 2 that is a shock absorbing member, a hollow detection tube member 3, a pressure sensor 4, a filling member 5, and a collision detection. An ECU 6 is provided. The vehicle collision detection device 1 detects a collision of an object (such as a pedestrian) with a bumper 7 provided in front of the vehicle. As shown in FIG. 3, the bumper 7 is mainly composed of a bumper cover 8, a bumper absorber 2, and a bumper reinforcement 9.

バンパアブソーバ２は、バンパレインフォースメント９の前面９ａに設けられ、検出用チューブ部材３を囲むように配設される。このバンパアブソーバ２は、バンパ７において衝撃吸収の作用を受け持つ部材であり、例えば発泡ポリプロピレンなどからなる。このバンパアブソーバ２の後面２ｂには、検出用チューブ部材３を装着するための溝部２ａが形成されている（図４参照）。この溝部２ａは、矩形形状の断面を有し、車幅方向に沿って形成されている。なお、溝部２ａは、車幅方向の途中に屈曲部を有していてもよいものとする。また、溝部２ａの断面形状は矩形に限られず、例えば円形や多角形であってもよい。   The bumper absorber 2 is provided on the front surface 9 a of the bumper reinforcement 9 and is disposed so as to surround the detection tube member 3. The bumper absorber 2 is a member responsible for shock absorption in the bumper 7, and is made of, for example, foamed polypropylene. A groove 2a for mounting the detection tube member 3 is formed on the rear surface 2b of the bumper absorber 2 (see FIG. 4). The groove 2a has a rectangular cross section and is formed along the vehicle width direction. In addition, the groove part 2a shall have a bending part in the middle of the vehicle width direction. Moreover, the cross-sectional shape of the groove part 2a is not restricted to a rectangle, For example, circular and a polygon may be sufficient.

検出用チューブ部材３は、内部に中空部３ａが形成され、車幅方向（車両左右方向）に延びている部材であり、バンパアブソーバ２の上記溝部２ａに装着されるものである。また、検出用チューブ部材３は、車両のバンパ７内におけるバンパレインフォースメント９の前面９ａ（車両前方側）に配設される。この検出用チューブ部材３の両端部は、バンパレインフォースメント９の車幅方向左右の外側にて、略コ字状に湾曲して後述する圧力センサ４に接続されている。   The detection tube member 3 is a member that has a hollow portion 3a formed therein and extends in the vehicle width direction (vehicle left-right direction), and is attached to the groove portion 2a of the bumper absorber 2. The detection tube member 3 is disposed on the front surface 9a (the vehicle front side) of the bumper reinforcement 9 in the bumper 7 of the vehicle. Both ends of the detection tube member 3 are curved in a substantially U-shape and connected to a pressure sensor 4 to be described later on the left and right outer sides of the bumper reinforcement 9 in the vehicle width direction.

この検出用チューブ部材３は、円形の断面形状を有し、合成ゴム、例えばシリコーンゴムからなる。また、検出用チューブ部材３の外径は、例えば１０ｍｍ程度であるとする。なお、検出用チューブ部材３の断面形状は、円形に限られず、四角形などの多角形であってもよい。また、検出用チューブ部材３の材質としては、他にもエチレンプロピレンゴム（ＥＰＤＭ）などでもよい。   The detection tube member 3 has a circular cross-sectional shape and is made of synthetic rubber, for example, silicone rubber. The outer diameter of the detection tube member 3 is assumed to be about 10 mm, for example. The cross-sectional shape of the detection tube member 3 is not limited to a circle, but may be a polygon such as a quadrangle. In addition, the material of the tube member 3 for detection may be ethylene propylene rubber (EPDM) or the like.

圧力センサ４は、バンパレインフォースメント９の前面９ａよりも車両後方側に配置される。具体的には、圧力センサ４は、バンパレインフォースメント９の左右両端部側の後面９ｂに２つ設置され、ボルト（図示しない）を締結することにより固定されて取り付けられる。本実施形態では、このように圧力センサ４を２つ設置することにより、冗長性及び検出精度を確保している。   The pressure sensor 4 is disposed on the vehicle rear side with respect to the front surface 9 a of the bumper reinforcement 9. Specifically, two pressure sensors 4 are installed on the rear surface 9b of the left and right ends of the bumper reinforcement 9, and are fixedly attached by fastening bolts (not shown). In this embodiment, redundancy and detection accuracy are ensured by installing two pressure sensors 4 in this way.

この圧力センサ４は、図２及び図５に示すように、検出用チューブ部材３の左右両端部に接続され、検出用チューブ部材３の中空部３ａ内の圧力を検出するように構成されている。具体的には、圧力センサ４は、気体の圧力変化を検出するセンサ装置であり、検出用チューブ部材３の中空部３ａ内の空気の圧力変化を検出する。圧力センサ４は、図１に示すように、伝送線を介して衝突検知ＥＣＵ（Electronic Control Unit）６に電気的に接続され、圧力に比例した信号を衝突検知ＥＣＵ６へ出力する。衝突検知ＥＣＵ６は、圧力センサ４による圧力検出結果に基づいて、バンパ７への歩行者の衝突を検知する。また、衝突検知ＥＣＵ６は、歩行者保護装置１０に電気的に接続されている。   As shown in FIGS. 2 and 5, the pressure sensor 4 is connected to the left and right ends of the detection tube member 3 and configured to detect the pressure in the hollow portion 3 a of the detection tube member 3. . Specifically, the pressure sensor 4 is a sensor device that detects a change in the pressure of the gas, and detects a change in the pressure of the air in the hollow portion 3 a of the detection tube member 3. As shown in FIG. 1, the pressure sensor 4 is electrically connected to a collision detection ECU (Electronic Control Unit) 6 via a transmission line, and outputs a signal proportional to the pressure to the collision detection ECU 6. The collision detection ECU 6 detects a pedestrian collision with the bumper 7 based on the pressure detection result by the pressure sensor 4. Further, the collision detection ECU 6 is electrically connected to the pedestrian protection device 10.

圧力センサ４は、図５に示すように、本体部４０と、センサ部４１と、圧力導入管４２と、コネクタ部４３とを備えて構成される。本体部４０は、センサ部４１を収容するための箱状のケースである。センサ部４１は、圧力検出用のセンサ素子等が設けられた基板などからなる。圧力導入管４２は、検出用チューブ部材３内の圧力をセンサ部４１に導入するための略円筒状の管であり、本体部４０から検出用チューブ部材３の中空部３ａ内に差し込まれている。センサ部４１は、圧力導入管４２を介して検出用チューブ部材３の中空部３ａ内の圧力変化を検出する。このセンサ部４１は、コネクタ部４３に設けられたコネクタ４４に電気的に接続されており、圧力に比例した信号をコネクタ４４及び信号線を介して衝突検知ＥＣＵ６へ送信する（図１参照）。   As shown in FIG. 5, the pressure sensor 4 includes a main body portion 40, a sensor portion 41, a pressure introduction pipe 42, and a connector portion 43. The main body 40 is a box-shaped case for housing the sensor unit 41. The sensor unit 41 is made of a substrate provided with a sensor element for pressure detection. The pressure introduction tube 42 is a substantially cylindrical tube for introducing the pressure in the detection tube member 3 into the sensor unit 41, and is inserted into the hollow portion 3 a of the detection tube member 3 from the main body unit 40. . The sensor unit 41 detects a pressure change in the hollow portion 3 a of the detection tube member 3 through the pressure introduction tube 42. The sensor unit 41 is electrically connected to a connector 44 provided in the connector unit 43, and transmits a signal proportional to the pressure to the collision detection ECU 6 via the connector 44 and the signal line (see FIG. 1).

そして、本実施形態では、上記バンパアブソーバ２の溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間に、柔軟性を有する充填部材５が設けられている（図３及び図４参照）。具体的には、充填部材５は、検出用チューブ部材３の外周部の車両前方側を覆うように配設される。なお、充填部材５は、検出用チューブ部材３の外周部の車両後方側を覆うように配設してもよく、また、検出用チューブ部材３の外周部の車両前方側及び車両後方側を覆うように配設してもよい。   In this embodiment, a flexible filling member 5 is provided in a gap formed on the vehicle front side of the detection tube member 3 in the groove 2a of the bumper absorber 2 (FIGS. 3 and 4). reference). Specifically, the filling member 5 is disposed so as to cover the vehicle front side of the outer peripheral portion of the detection tube member 3. The filling member 5 may be disposed so as to cover the vehicle rear side of the outer peripheral portion of the detection tube member 3, and covers the vehicle front side and the vehicle rear side of the outer peripheral portion of the detection tube member 3. You may arrange | position.

この充填部材５は、例えば熱可塑性エラストマーなどの熱可塑性樹脂からなり、検出用チューブ部材３と別体部材である。また、充填部材５は、検出用チューブ部材３が溝部２ａ内に装着された後に、溝部２ａ内に車幅方向全体にわたって充填されるものである。具体的には、加熱されて軟化（液化）した充填部材５を、検出用チューブ部材３が装着されたバンパアブソーバ２の溝部２ａ内に流し込む。このとき、図４に示すバンパアブソーバ２の車両前方側の面を下にして充填部材５を流し込むと、溝部２ａ内の車両前方側に充填部材５を容易に充填することができる。軟化した充填部材５は、やがて冷えて硬化（固化）して所定の位置に配設される。本実施形態では、このように充填部材５を充填することで、溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間を小さくした状態を維持できるようにしている。なお、充填部材５の材質は、柔軟性を有する熱可塑性樹脂であれば適宜選択可能であるものとする。   The filling member 5 is made of a thermoplastic resin such as a thermoplastic elastomer, and is a separate member from the detection tube member 3. The filling member 5 is filled over the entire vehicle width direction in the groove 2a after the detection tube member 3 is mounted in the groove 2a. Specifically, the filling member 5 heated and softened (liquefied) is poured into the groove 2a of the bumper absorber 2 to which the detection tube member 3 is attached. At this time, if the filling member 5 is poured with the front surface of the bumper absorber 2 shown in FIG. 4 facing down, the filling member 5 can be easily filled in the front side of the vehicle in the groove 2a. The softened filling member 5 eventually cools and hardens (solidifies) and is disposed at a predetermined position. In the present embodiment, by filling the filling member 5 in this way, the state in which the gap formed on the front side of the vehicle of the detection tube member 3 in the groove 2a can be maintained small. Note that the material of the filling member 5 can be appropriately selected as long as it is a thermoplastic resin having flexibility.

衝突検知ＥＣＵ６は、ＣＰＵを主体として構成され、車両用衝突検知装置１の動作全般を制御するものであり、圧力センサ４、歩行者保護装置１０のそれぞれに電気的に接続されている（図１参照）。衝突検知ＥＣＵ６には、圧力センサ４からの圧力信号（圧力データ）などが入力される。衝突検知ＥＣＵ６は、圧力センサ４による圧力検出結果（入力信号）に基づいて所定の衝突判定処理を実行し、バンパ７への歩行者などの物体の衝突を検知した場合には歩行者保護装置１０を作動させる。   The collision detection ECU 6 is composed mainly of a CPU and controls the overall operation of the vehicle collision detection apparatus 1 and is electrically connected to the pressure sensor 4 and the pedestrian protection apparatus 10 (FIG. 1). reference). A pressure signal (pressure data) from the pressure sensor 4 is input to the collision detection ECU 6. The collision detection ECU 6 executes a predetermined collision determination process based on the pressure detection result (input signal) by the pressure sensor 4 and detects a collision of an object such as a pedestrian to the bumper 7, the pedestrian protection device 10. Is activated.

バンパ７は、車両の衝突時における衝撃を和らげるためのものであり、バンパカバー８、バンパアブソーバ２、バンパレインフォースメント９などから構成される。バンパカバー８は、バンパ７の構成部品を覆うように設けられ、ポリプロピレン等の樹脂製の部材である。このバンパカバー８は、バンパ７の外観を構成すると同時に、車両全体の外観の一部を構成するものとなっている。   The bumper 7 is for reducing an impact at the time of a vehicle collision, and includes a bumper cover 8, a bumper absorber 2, a bumper reinforcement 9, and the like. The bumper cover 8 is provided so as to cover the components of the bumper 7 and is a resin member such as polypropylene. The bumper cover 8 constitutes the appearance of the bumper 7 and at the same time constitutes a part of the appearance of the entire vehicle.

バンパレインフォースメント９は、バンパカバー８内に配設されて車幅方向に延びるアルミニウムなどの金属製の剛性部材であって、図３に示すように、内部中央に梁が設けられた日の字状断面を有する中空部材である。また、バンパレインフォースメント９は、車両前方側の面（前面９ａ）と、車両後方側の面（後面９ｂ）とを有している。このバンパレインフォースメント９は、図１及び図２に示すように、車両前後方向に延びる一対の金属製部材であるサイドメンバ１１の前端に取り付けられる。   The bumper reinforcement 9 is a rigid member made of metal such as aluminum that is disposed in the bumper cover 8 and extends in the vehicle width direction. As shown in FIG. A hollow member having a letter-shaped cross section. The bumper reinforcement 9 has a vehicle front side surface (front surface 9a) and a vehicle rear side surface (rear surface 9b). As shown in FIGS. 1 and 2, the bumper reinforcement 9 is attached to the front end of a side member 11 that is a pair of metal members extending in the vehicle front-rear direction.

通常、車両の衝突事故においては、車両の進行方向（車両前方）に存在する歩行者や車両と衝突する場合が多い。このため、本実施形態では、圧力センサ４をバンパレインフォースメント９の後面９ｂに配設して、車両前方の歩行者や車両との衝突に伴う衝撃（外力）が、車両前方に設けられたバンパカバー８などから圧力センサ４に直接伝わることをバンパレインフォースメント９の存在によって保護している。   Usually, in a vehicle collision accident, there are many cases where the vehicle collides with a pedestrian or a vehicle existing in the traveling direction of the vehicle (front of the vehicle). For this reason, in this embodiment, the pressure sensor 4 is disposed on the rear surface 9b of the bumper reinforcement 9, and an impact (external force) associated with a collision with a pedestrian or vehicle in front of the vehicle is provided in front of the vehicle. Direct transmission from the bumper cover 8 or the like to the pressure sensor 4 is protected by the presence of the bumper reinforcement 9.

歩行者保護装置１０としては、例えばポップアップフードを用いる。このポップアップフードは、車両の衝突検知後瞬時に、エンジンフードの後端を上昇させ、歩行者とエンジンなどの硬い部品との間隔（クリアランス）を増加させ、そのスペースを用いて歩行者の頭部への衝突エネルギーを吸収し、歩行者の頭部への衝撃を低減させるものである。なお、ポップアップフードの代わりに、車体外部のエンジンフード上からフロントウインド下部にかけてエアバッグを展開させて歩行者の衝撃を緩衝するカウルエアバッグなどを用いてもよい。   For example, a pop-up hood is used as the pedestrian protection device 10. This pop-up hood raises the rear end of the engine hood instantly after detecting a vehicle collision, increases the clearance (clearance) between the pedestrian and hard parts such as the engine, and uses that space to make the pedestrian's head The impact energy on the pedestrian is absorbed and the impact on the pedestrian's head is reduced. Instead of the pop-up hood, a cowl airbag that cushions a pedestrian's impact by deploying an airbag from the engine hood outside the vehicle body to the lower part of the front window may be used.

次に、本実施形態における車両用衝突検知装置１の衝突時の動作について説明する。車両前方に歩行者などの物体が衝突した際には、バンパ７のバンパカバー８が歩行者との衝突による衝撃により変形する。続いて、バンパアブソーバ２が衝撃を吸収しながら変形すると同時に、検出用チューブ部材３も変形する。このとき、検出用チューブ部材３内の圧力が急上昇し、この圧力変化が圧力センサ４に伝達する。   Next, the operation | movement at the time of the collision of the collision detection apparatus 1 for vehicles in this embodiment is demonstrated. When an object such as a pedestrian collides with the front of the vehicle, the bumper cover 8 of the bumper 7 is deformed by an impact caused by the collision with the pedestrian. Subsequently, the bumper absorber 2 is deformed while absorbing the impact, and at the same time, the detection tube member 3 is also deformed. At this time, the pressure in the detection tube member 3 rapidly increases, and this pressure change is transmitted to the pressure sensor 4.

更に、本実施形態では、検出用チューブ部材３が装着されたバンパアブソーバ２の溝部２ａ内において、溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間に充填部材５が充填されているので、バンパアブソーバ２の変形に伴って検出用チューブ部材３を適切に変形させることが可能となっている。すなわち、充填部材５を配設することにより、衝突時のバンパアブソーバ２及び検出用チューブ部材３の変形を阻害することなく、溝部２ａにおける検出用チューブ部材３の車両前方側に形成される隙間のばらつきをなくすことができ、衝突検知を正確に行うことを可能としている。   Further, in this embodiment, the filling member 5 is filled in a gap formed on the vehicle front side of the detection tube member 3 in the groove 2a in the groove 2a of the bumper absorber 2 to which the detection tube member 3 is mounted. Therefore, the detection tube member 3 can be appropriately deformed with the deformation of the bumper absorber 2. That is, by disposing the filling member 5, the gap formed on the vehicle front side of the detection tube member 3 in the groove 2 a is not inhibited without inhibiting the deformation of the bumper absorber 2 and the detection tube member 3 at the time of collision. Variations can be eliminated, and collision detection can be performed accurately.

車両用衝突検知装置１の衝突検知ＥＣＵ６は、圧力センサ４の検知結果に基づいて、所定の衝突判定処理を実行する。この衝突判定処理では、例えば圧力センサ４及び車速センサ（図示しない）の検出結果に基づいて、衝突物の有効質量を算出し、この有効質量が所定の閾値より大きい場合、歩行者との衝突が発生したものと判定し、更に車両速度が所定の範囲（例えば時速２５ｋｍ〜５５ｋｍの範囲）内である場合に、歩行者保護装置１０の作動を要する歩行者との衝突が発生したものと判定する。   The collision detection ECU 6 of the vehicle collision detection device 1 executes a predetermined collision determination process based on the detection result of the pressure sensor 4. In this collision determination process, for example, the effective mass of the collision object is calculated based on the detection results of the pressure sensor 4 and the vehicle speed sensor (not shown), and when this effective mass is larger than a predetermined threshold, the collision with the pedestrian is detected. It is determined that a collision has occurred with a pedestrian that requires operation of the pedestrian protection device 10 when the vehicle speed is within a predetermined range (for example, a range of 25 to 55 km / h). .

ここで、「有効質量」とは、衝突時における圧力センサ４の検出値より、運動量と力積の関係を利用して算出する質量をいう。車両と物体との衝突が発生した場合、歩行者とは質量の異なる衝突物では、検知される圧力センサ４の値が異なる。このため、人体の有効質量と、想定される他の衝突物の質量との間に閾値を設定することにより、衝突物の種類を切り分けることが可能となる。この有効質量は、次式に示すように、圧力センサ４により検出される圧力の値の所定時間における区間積分値を車両速度で割ることにより算出される。   Here, the “effective mass” refers to a mass that is calculated from the detected value of the pressure sensor 4 at the time of collision using the relationship between momentum and impulse. When a collision between a vehicle and an object occurs, the value of the detected pressure sensor 4 is different for a collision object having a mass different from that of a pedestrian. For this reason, by setting a threshold value between the effective mass of the human body and the mass of another assumed collision object, it is possible to classify the types of the collision object. This effective mass is calculated by dividing the integrated value of the pressure value detected by the pressure sensor 4 at a predetermined time by the vehicle speed, as shown in the following equation.

Ｍ＝（∫Ｐ（ｔ）ｄｔ）／Ｖ・・・（式１）
なお、Ｍは有効質量、Ｐは所定時間における圧力センサ４による検出値、ｔは所定時間（例えば、数ｍｓ〜数十ｍｓ）、Ｖは衝突時の車両速度を示している。有効質量を算出する方法には、他にも、衝突した物体の運動エネルギーＥを表す式Ｅ＝１／２・ＭＶ2を用いて算出することが可能である。この場合、有効質量は、Ｍ＝２・Ｅ／Ｖ2により算出される。 M = (∫P (t) dt) / V (Expression 1)
Note that M is an effective mass, P is a value detected by the pressure sensor 4 at a predetermined time, t is a predetermined time (for example, several ms to several tens of ms), and V is a vehicle speed at the time of collision. As another method for calculating the effective mass, it is possible to calculate using an equation E = 1/2 · MV 2 representing the kinetic energy E of the collided object. In this case, the effective mass is calculated by M = 2 · E / V 2 .

そして、衝突検知ＥＣＵ６は、歩行者保護装置１０の作動を要する歩行者との衝突が発生したと判定した場合、歩行者保護装置１０を作動させる制御信号を出力し、歩行者保護装置１０を作動させて、上記したように歩行者への衝撃を低減させる。   When the collision detection ECU 6 determines that a collision has occurred with a pedestrian that requires the pedestrian protection device 10 to operate, the collision detection ECU 6 outputs a control signal for operating the pedestrian protection device 10 to operate the pedestrian protection device 10. Let the impact on the pedestrian be reduced as described above.

以上説明したように、第１の実施形態の車両用衝突検知装置１は、車両のバンパ７内に配設された衝撃吸収用部材であるバンパアブソーバ２と、バンパアブソーバ２に車幅方向に沿って形成された溝部２ａに装着されると共にバンパレインフォースメント９の車両前方側に配設される内部に中空部３ａが形成された検出用チューブ部材３と、検出用チューブ部材３の中空部３ａ内の圧力を検出する圧力センサ４とを有し、圧力センサ４による圧力検出結果に基づいてバンパ７への物体（歩行者）の衝突を検知する。そして、溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間に充填される充填部５を備えたことを特徴とする。   As described above, the vehicle collision detection apparatus 1 according to the first embodiment has a bumper absorber 2 that is an impact absorbing member disposed in a bumper 7 of the vehicle, and the bumper absorber 2 along the vehicle width direction. The detection tube member 3 that is mounted in the groove portion 2a formed in the above and has a hollow portion 3a formed inside the bumper reinforcement 9 on the vehicle front side, and the hollow portion 3a of the detection tube member 3 And a pressure sensor 4 for detecting the internal pressure, and detects a collision of an object (pedestrian) with the bumper 7 based on a pressure detection result by the pressure sensor 4. And it has the filling part 5 with which the clearance gap formed in the vehicle front side of the tube member 3 for a detection in the groove part 2a is provided.

この構成によれば、バンパアブソーバ２に形成された溝部２ａに充填部材５を設けることによって、溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間のばらつきを小さくすることができる。これにより、車両と歩行者との衝突時における検出用チューブ部材３の変形量が車幅方向においてばらつくことを防ぐことができ、車両用衝突検知装置１の衝突検知精度を向上させることができる。   According to this configuration, by providing the filling member 5 in the groove 2a formed in the bumper absorber 2, the variation in the gap formed on the vehicle front side of the detection tube member 3 in the groove 2a can be reduced. . Thereby, it can prevent that the deformation amount of the tube member 3 for a detection at the time of a collision with a vehicle and a pedestrian varies in the vehicle width direction, and the collision detection accuracy of the vehicle collision detection apparatus 1 can be improved.

また、製造時にバンパアブソーバ２の溝部２ａに寸法公差が生じることにより、製造された複数のバンパアブソーバ２の溝部２ａの寸法には個々に差が生じるが、溝部２ａに充填部材５を設けることによって、溝部２ａ内における検出用チューブ部材３の車両前方側または後方側に形成される隙間が、各バンパアブソーバ２間でばらつくことをなくすことができる。これにより、車両と歩行者との衝突時における検出用チューブ部材３の変形量、すなわち圧力センサ４による圧力検出結果が各バンパアブソーバ２の寸法によってばらつくことを防ぐことができ、車両用衝突検知装置１による衝突検知精度の信頼性を向上させることができる。   In addition, when a dimensional tolerance is generated in the groove 2a of the bumper absorber 2 at the time of manufacture, a difference occurs in the size of the groove 2a of the plurality of bumper absorbers 2 manufactured. The gap formed on the vehicle front side or the rear side of the detection tube member 3 in the groove 2a can be prevented from varying between the bumper absorbers 2. Thereby, the deformation amount of the detection tube member 3 at the time of the collision between the vehicle and the pedestrian, that is, the pressure detection result by the pressure sensor 4 can be prevented from varying depending on the size of each bumper absorber 2. The reliability of the collision detection accuracy by 1 can be improved.

また、検出用チューブ部材３の車両後方側に剛性部材であるバンパレインフォースメント９が配設されているとともに、溝部２ａの内壁面と検出用チューブ部材３との車両前後方向の隙間に充填部材５が充填されているので、検出用チューブ部材３が車両後方側に撓むことを確実に防止することができ、衝突検知を正確に行うことができる。   Further, a bumper reinforcement 9 that is a rigid member is disposed on the vehicle rear side of the detection tube member 3, and a filling member is provided in a gap in the vehicle front-rear direction between the inner wall surface of the groove 2a and the detection tube member 3. Since 5 is filled, it can prevent reliably that the tube member 3 for a detection is bent to the vehicle rear side, and a collision detection can be performed correctly.

また、充填部材５は、柔軟性を有する部材からなることを特徴とする。この構成によれば、充填部材５が柔軟性を有しているので、溝部２ａと検出用チューブ部材３との隙間に充填部材５を充填しても、衝突時においてバンパアブソーバ２及び検出用チューブ部材３が車両前後方向に変形することを阻害しない。これにより、車両用衝突検知装置１の衝突検知精度を確実に向上させることができる。   The filling member 5 is made of a flexible member. According to this configuration, since the filling member 5 has flexibility, even if the filling member 5 is filled in the gap between the groove portion 2a and the detection tube member 3, the bumper absorber 2 and the detection tube at the time of collision. It does not hinder the member 3 from being deformed in the vehicle front-rear direction. Thereby, the collision detection accuracy of the vehicle collision detection apparatus 1 can be improved with certainty.

また、充填部材５は、検出用チューブ部材３とは別に溝部２ａ内に供給されて溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間に充填されたことを特徴とする。この構成によれば、検出用チューブ部材３と充填部材５とが別体であるので、バンパアブソーバ２の溝部２ａに、検出用チューブ部材３よりも柔らかい材質の充填部材５を容易に充填することができる。   Further, the filling member 5 is supplied into the groove 2a separately from the detection tube member 3, and is filled in a gap formed on the vehicle front side of the detection tube member 3 in the groove 2a. According to this configuration, since the detection tube member 3 and the filling member 5 are separate, the groove member 2a of the bumper absorber 2 can be easily filled with the filling member 5 made of a softer material than the detection tube member 3. Can do.

また、充填部材５は、熱可塑性樹脂からなり、検出用チューブ部材３を溝部２ａに装着した後に、当該溝部２ａに充填されるものであることを特徴とする。この構成によれば、検出用チューブ部材３が装着された溝部２ａに、熱を加えることにより軟化（液化）した充填部材５を充填することで、溝部２ａ内における検出用チューブ部材３の車両前方側に形成される隙間を確実に埋めることができる。   The filling member 5 is made of a thermoplastic resin, and is characterized in that the groove member 2a is filled after the detection tube member 3 is mounted in the groove 2a. According to this configuration, the groove portion 2a in which the detection tube member 3 is mounted is filled with the filling member 5 softened (liquefied) by applying heat, so that the detection tube member 3 in the groove portion 2a is in front of the vehicle. The gap formed on the side can be reliably filled.

また、充填部材５は、検出用チューブ部材３の外周部の車両前方側を覆うように配設されることを特徴とする。この構成によれば、検出用チューブ部材３の車両前方側に充填部材５を充填することで、溝部２ａ内における検出用チューブ部材３の車両前方側の隙間を効率良く小さくすることができる。   The filling member 5 is disposed so as to cover the vehicle front side of the outer peripheral portion of the detection tube member 3. According to this configuration, by filling the filling member 5 on the vehicle front side of the detection tube member 3, the gap on the vehicle front side of the detection tube member 3 in the groove 2a can be efficiently reduced.

また、充填部材５は、溝部２ａの車幅方向全体にわたって設けられることを特徴とする。この構成によれば、充填部材５を溝部２ａの車幅方向全体にわたって設けることで、溝部２ａ内における検出用チューブ部材３の車両前方側の隙間のばらつきを車幅方向全体にわたって小さくすることができ、より効果的に車両用衝突検知装置１の衝突検知精度を向上させることができる。   Moreover, the filling member 5 is provided over the whole vehicle width direction of the groove part 2a. According to this configuration, by providing the filling member 5 over the entire vehicle width direction of the groove portion 2a, the variation in the clearance on the vehicle front side of the detection tube member 3 in the groove portion 2a can be reduced over the entire vehicle width direction. Thus, the collision detection accuracy of the vehicle collision detection apparatus 1 can be improved more effectively.

また、溝部２ａは、バンパアブソーバ２の後面２ｂに設けられていることを特徴とする。この構成によれば、検出用チューブ部材３をバンパレインフォースメント９の車両前方側に安定して配置することができるとともに、検出用チューブ部材３をバンパアブソーバ２へ組付け易くすることができる。   Further, the groove portion 2 a is provided on the rear surface 2 b of the bumper absorber 2. According to this configuration, the detection tube member 3 can be stably disposed on the vehicle front side of the bumper reinforcement 9 and the detection tube member 3 can be easily assembled to the bumper absorber 2.

また、圧力センサ４は、バンパレインフォースメント９の後面９ｂに固定されることを特徴とする。この構成によれば、圧力センサ４をバンパレインフォースメント９の後面９ｂ（車両後方側）に固定しているので、バンパ７の左右端部付近に歩行者など（物体）が衝突しても、バンパレインフォースメント９によって衝撃が低減され、圧力センサ４にバンパカバー８からの衝撃が直接伝わらない。このため、バンパカバー８の変形により圧力センサ４に外力が加わり、圧力センサ４が外力により損傷してしまうことを防止できる。これにより、車両用衝突検知装置１の耐性を改善できるとともに、車両用衝突検知装置１による衝突検知の信頼性を向上させることができる。   The pressure sensor 4 is fixed to the rear surface 9b of the bumper reinforcement 9. According to this configuration, since the pressure sensor 4 is fixed to the rear surface 9b (rear side of the vehicle) of the bumper reinforcement 9, even if a pedestrian or the like (object) collides with the vicinity of the left and right ends of the bumper 7, The impact is reduced by the bumper reinforcement 9, and the impact from the bumper cover 8 is not directly transmitted to the pressure sensor 4. For this reason, it is possible to prevent an external force from being applied to the pressure sensor 4 due to the deformation of the bumper cover 8 and the pressure sensor 4 to be damaged by the external force. Thereby, while being able to improve the tolerance of the collision detection apparatus 1 for vehicles, the reliability of the collision detection by the collision detection apparatus 1 for vehicles can be improved.

更に、圧力センサ４は、バンパレインフォースメント９の後面９ｂにボルトの締結により固定されているので、圧力センサ４をバンパレインフォースメント９に確実に固定することができ、衝突時に圧力センサ４が外力により外れたり損傷したりすることを防止できる。   Furthermore, since the pressure sensor 4 is fixed to the rear surface 9b of the bumper reinforcement 9 by fastening bolts, the pressure sensor 4 can be securely fixed to the bumper reinforcement 9 and the pressure sensor 4 is It can be prevented from coming off or being damaged by an external force.

また、本実施形態では、圧力センサ４をバンパレインフォースメント９の後面９ｂの左右両端部側に２つ配設することにより、検出用チューブ部材３における圧力変化を高い精度で検知できるとともに、冗長性を確保できる。すなわち、２つの圧力センサ４の出力を用いて衝突判定を行うことによって、誤検知を防止して正確な衝突検知を行うことができる。   In the present embodiment, by arranging two pressure sensors 4 on the left and right end portions of the rear surface 9b of the bumper reinforcement 9, it is possible to detect a pressure change in the detection tube member 3 with high accuracy and to provide redundancy. Can be secured. That is, by performing collision determination using the outputs of the two pressure sensors 4, it is possible to prevent erroneous detection and perform accurate collision detection.

［第２の実施形態］
次に、本発明の第２の実施形態について、図６〜図８を参照して説明する。なお、図６〜図８には上記第１の実施形態と同一部分には同一の符号を付して説明を省略し、異なる部分についてだけ説明する。第２の実施形態においては、検出用チューブ部材３が溝部２ａに装着される前に、当該溝部２ａ内の車両前方側に充填部材５１が配設されている（図７参照）。そして、検出用チューブ部材３を溝部２ａの奥方（車両前方）へ押し込んで装着することにより、充填部材５１が検出用チューブ部材３の外周部の車両前方側を覆うように配設される（図６参照）。 [Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 8, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described. In the second embodiment, before the detection tube member 3 is mounted in the groove 2a, the filling member 51 is disposed on the vehicle front side in the groove 2a (see FIG. 7). Then, by inserting the detection tube member 3 into the back of the groove 2a (front of the vehicle) and mounting it, the filling member 51 is disposed so as to cover the vehicle front side of the outer periphery of the detection tube member 3 (FIG. 6).

この充填部材５１は、例えば軟質ポリウレタンフォームなどの軟質樹脂からなり、バンパアブソーバ２及び検出用チューブ部材３よりも柔らかい部材となっている。これにより、充填部材５１を溝部２ａ内に押し込んで装着する際に、充填部材５１が優先的に潰れて変形するので、溝部２ａ内における検出用チューブ部材３と当該溝部２ａとの車両前後方向の隙間を効率良く小さくすることができる。また、車両と歩行者との衝突時に、バンパアブソーバ２及び検出用チューブ部材３の変形に対して、充填部材５１の存在が悪影響を与えないようにしている。   The filling member 51 is made of a soft resin such as a soft polyurethane foam, and is softer than the bumper absorber 2 and the detection tube member 3. Thus, when the filling member 51 is pushed into the groove portion 2a and mounted, the filling member 51 is preferentially crushed and deformed, so that the detection tube member 3 in the groove portion 2a and the groove portion 2a in the vehicle front-rear direction are arranged. The gap can be reduced efficiently. Further, the presence of the filling member 51 does not adversely affect the deformation of the bumper absorber 2 and the detection tube member 3 at the time of collision between the vehicle and the pedestrian.

以上説明した第２の実施形態の車両用衝突検知装置１は、検出用チューブ部材３を溝部２ａに装着する前に充填部材５１を溝部２ａに配設し、検出用チューブ部材３を装着後に充填部材５１が検出用チューブ部材３の外周部の車両前方側を覆うように配設されることを特徴とする。   In the vehicle collision detection device 1 according to the second embodiment described above, the filling member 51 is disposed in the groove portion 2a before the detection tube member 3 is attached to the groove portion 2a, and the detection tube member 3 is filled after the attachment. The member 51 is disposed so as to cover the vehicle front side of the outer peripheral portion of the detection tube member 3.

この構成によれば、第１の実施形態と同様の効果を得ることができるとともに、予め充填部材５１を配設した溝部２ａに検出用チューブ部材３を装着することで、溝部２ａ内における検出用チューブ部材３の車両前方側の隙間を小さくすることができるので、容易な製造方法且つ簡易な構成で、車両用衝突検知装置１の衝突検知精度を向上させることができる。   According to this configuration, the same effect as that of the first embodiment can be obtained, and the detection tube member 3 is attached to the groove portion 2a in which the filling member 51 is disposed in advance, thereby detecting the detection in the groove portion 2a. Since the gap on the vehicle front side of the tube member 3 can be reduced, the collision detection accuracy of the vehicle collision detection apparatus 1 can be improved with an easy manufacturing method and a simple configuration.

また、充填部材５１は、柔軟性を有する軟質樹脂からなり、バンパアブソーバ２及び検出用チューブ部材３よりも柔らかい部材であることを特徴とする。この構成によれば、溝部２ａと検出用チューブ部材３との隙間に充填部材５１を配設しても、充填部材５１がバンパアブソーバ２及び検出用チューブ部材３よりも柔らかい材質であるので、衝突時においてバンパアブソーバ２及び検出用チューブ部材３が変形することに対して悪影響を与えない。これにより、車両用衝突検知装置１の衝突検知精度をより確実に向上させることができる。   Further, the filling member 51 is made of a soft resin having flexibility, and is a member softer than the bumper absorber 2 and the detection tube member 3. According to this configuration, even if the filling member 51 is disposed in the gap between the groove 2 a and the detection tube member 3, the filling member 51 is made of a softer material than the bumper absorber 2 and the detection tube member 3. At this time, the bumper absorber 2 and the detection tube member 3 are not adversely affected. Thereby, the collision detection accuracy of the vehicle collision detection apparatus 1 can be improved more reliably.

また、充填部材５１は、検出用チューブ部材３とは別に溝部２ａ内に供給されて溝部２ａ内における検出用チューブ部材３の車両前方側の隙間に充填（配設）されたことを特徴とする。この構成によれば、検出用チューブ部材３と充填部材５１とが別体であるので、バンパアブソーバ２の溝部２ａに、バンパアブソーバ２及び検出用チューブ部材３よりも柔らかい材質の充填部材５を容易に配置することができる。   Further, the filling member 51 is supplied into the groove portion 2a separately from the detection tube member 3, and is filled (arranged) in the gap on the vehicle front side of the detection tube member 3 in the groove portion 2a. . According to this configuration, since the detection tube member 3 and the filling member 51 are separate, the filling member 5 made of a material softer than the bumper absorber 2 and the detection tube member 3 can be easily provided in the groove portion 2a of the bumper absorber 2. Can be arranged.

なお、上記した第２の実施形態では、検出用チューブ部材３は、バンパアブソーバ２の車両後方側に配設された場合について説明したが、これに限られず、検出用チューブ部材３の配設位置を適宜変更させてもよい。例えば、図８に示すように、検出用チューブ部材３を、バンパレインフォースメント９の車両前方側におけるバンパアブソーバ２の中央上部に配置してもよい。   In the second embodiment described above, the case where the detection tube member 3 is disposed on the vehicle rear side of the bumper absorber 2 has been described. However, the present invention is not limited to this, and the position where the detection tube member 3 is disposed. May be changed as appropriate. For example, as shown in FIG. 8, the detection tube member 3 may be disposed at the center upper portion of the bumper absorber 2 on the vehicle front side of the bumper reinforcement 9.

また、充填部材５１をバンパアブソーバ２の溝部２ａ内の車幅方向全体にわたって配設しなくてもよく、例えば車幅方向に所定間隔をあけて複数の充填部材５１を設けるようにしてもよい。更に、充填部材５１の材質としては、バンパアブソーバ２及び検出用チューブ部材３よりも柔らかい材質であれば適宜選択可能であるとする。   Further, the filling member 51 may not be disposed over the entire vehicle width direction in the groove portion 2a of the bumper absorber 2. For example, a plurality of filling members 51 may be provided at predetermined intervals in the vehicle width direction. Furthermore, the material of the filling member 51 can be selected as appropriate as long as the material is softer than the bumper absorber 2 and the detection tube member 3.

また、上記第２の実施形態では、充填部材５１を溝部２ａ内における検出用チューブ部材３の車両前方側に配設したが、これに限られず、充填部材５１を溝部２ａ内における検出用チューブ部材３の車両後方側に配設してもよい。   Moreover, in the said 2nd Embodiment, although the filling member 51 was arrange | positioned in the vehicle front side of the detection tube member 3 in the groove part 2a, it is not restricted to this, The filling member 51 is the detection tube member in the groove part 2a. 3 may be disposed on the vehicle rear side.

［第３の実施形態］
次に、本発明の第３の実施形態について、図９、図１０を参照して説明する。なお、図９、図１０には上記第１の実施形態と同一部分には同一の符号を付して説明を省略し、異なる部分についてだけ説明する。第３の実施形態においては、検出用チューブ部材３の外周部全体を覆うように充填部材５２が一体形成されている（図１０参照）。この充填部材５２に覆われた検出用チューブ部材３を、溝部２ａに嵌合させて装着する（図９参照）。 [Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. In FIG. 9 and FIG. 10, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only different parts will be described. In the third embodiment, a filling member 52 is integrally formed so as to cover the entire outer peripheral portion of the detection tube member 3 (see FIG. 10). The detection tube member 3 covered with the filling member 52 is fitted into the groove 2a and mounted (see FIG. 9).

具体的には、検出用チューブ部材３を溝部２ａに装着する前の状態では、図１０に示すように、溝部２ａの車両前後方向の長さＡよりも、充填部材５２に覆われた検出用チューブ部材３の車両前後方向の長さＢの方が長くなるようになっている。この後、図９に示すように、充填部材５２に覆われた検出用チューブ部材３を溝部２ａに嵌め込むとともに、バンパレインフォースメント９の前面９ａに配置する。このとき、検出用チューブ部材３の外周部に設けられた充填部材５２が優先的に潰れて変形するので、溝部２ａ内における検出用チューブ部材３の車両前方側及び後方側に形成される隙間を効率良く小さくすることができる。このようにして、検出用チューブ部材３及び充填部材５２のバンパアブソーバ２（溝部２ａ）への組付けが完了する。   Specifically, in a state before the detection tube member 3 is mounted in the groove portion 2a, as shown in FIG. 10, the detection member covered with the filling member 52 is longer than the length A in the vehicle front-rear direction of the groove portion 2a. The length B of the tube member 3 in the vehicle front-rear direction is longer. Thereafter, as shown in FIG. 9, the detection tube member 3 covered with the filling member 52 is fitted into the groove 2 a and disposed on the front surface 9 a of the bumper reinforcement 9. At this time, since the filling member 52 provided on the outer peripheral portion of the detection tube member 3 is preferentially crushed and deformed, gaps formed on the vehicle front side and the rear side of the detection tube member 3 in the groove portion 2a. It can be reduced efficiently. In this way, the assembly of the detection tube member 3 and the filling member 52 to the bumper absorber 2 (groove portion 2a) is completed.

また、充填部材５２は、第２の実施形態と同様に、例えば軟質ポリウレタンフォームなどからなり、バンパアブソーバ２及び検出用チューブ部材３よりも柔らかい部材となっている。このため、充填部材５２に覆われた検出用チューブ部材３を溝部２ａ内に嵌め込んでも、衝突時にバンパアブソーバ２及び検出用チューブ部材３の変形に対して悪影響を与えない。また、充填部材５２に覆われた検出用チューブ部材３の外形形状と、溝部２ａの外形形状とは、車両前後方向の長さを除いては整合したものとなっているものとする。   Further, as in the second embodiment, the filling member 52 is made of, for example, a flexible polyurethane foam, and is a member softer than the bumper absorber 2 and the detection tube member 3. For this reason, even if the detection tube member 3 covered with the filling member 52 is fitted into the groove 2a, there is no adverse effect on the deformation of the bumper absorber 2 and the detection tube member 3 at the time of collision. Further, it is assumed that the outer shape of the detection tube member 3 covered with the filling member 52 and the outer shape of the groove 2a are matched except for the length in the vehicle front-rear direction.

以上説明した第３の実施形態の車両用衝突検知装置１では、充填部材５２は、検出用チューブ部材３と予め一体化され、検出用チューブ部材３を溝部内に挿入する際に溝部２ａに嵌合することにより、溝部２ａ内における検出用チューブ部材３の車両前方側及び後方側に形成される隙間に充填されたことを特徴とする。   In the vehicle collision detection apparatus 1 according to the third embodiment described above, the filling member 52 is integrated with the detection tube member 3 in advance, and is fitted into the groove portion 2a when the detection tube member 3 is inserted into the groove portion. By combining, it has filled the clearance gap formed in the vehicle front side and back side of the tube member 3 for a detection in the groove part 2a.

この構成によれば、第１の実施形態と同様の効果を得ることができるとともに、検出用チューブ部材３と充填部材５２とが一体化されているので、第１の実施形態のように軟化した充填部材５を充填する充填工程が不要となり、検出用チューブ部材３及び充填部材５２のバンパアブソーバ２への組付けを容易に行うことができ、製造工程の簡素化を図ることができる。   According to this configuration, the same effects as those of the first embodiment can be obtained, and the detection tube member 3 and the filling member 52 are integrated, so that the softening as in the first embodiment is achieved. A filling step for filling the filling member 5 is not required, the detection tube member 3 and the filling member 52 can be easily assembled to the bumper absorber 2, and the manufacturing process can be simplified.

また、充填部材５２は、検出用チューブ部材３を溝部２ａに装着する前に、検出用チューブ部材３の外周部全体を覆うように配設されるものであることを特徴とする。   In addition, the filling member 52 is disposed so as to cover the entire outer peripheral portion of the detection tube member 3 before the detection tube member 3 is mounted in the groove 2a.

この構成によれば、充填部材５２により外周部全体が覆われた検出用チューブ部材３を溝部２ａに装着することで、溝部２ａ内における検出用チューブ部材３の車両前方側及び後方側に形成される隙間のばらつきを埋めることができ、車両と歩行者との衝突時における検出用チューブ部材３の変形量が車幅方向においてばらつくことを確実に防ぐことができる。特に、充填部材５２に覆われた検出用チューブ部材３の外形形状と、溝部２ａの外形形状とが整合したものとなっているので、溝部２ａ内における検出用チューブ部材３の車両前方側及び後方側に形成される隙間をより確実になくすことができる。これにより、車両用衝突検知装置１の衝突検知精度をより向上させることができる。   According to this configuration, the detection tube member 3 whose entire outer peripheral portion is covered with the filling member 52 is attached to the groove portion 2a, so that it is formed on the vehicle front side and the rear side of the detection tube member 3 in the groove portion 2a. Therefore, it is possible to reliably prevent variations in the deformation amount of the detection tube member 3 in the vehicle width direction at the time of collision between the vehicle and the pedestrian. In particular, since the outer shape of the detection tube member 3 covered with the filling member 52 and the outer shape of the groove 2a are matched, the vehicle front side and the rear side of the detection tube member 3 in the groove 2a. The gap formed on the side can be eliminated more reliably. Thereby, the collision detection accuracy of the vehicle collision detection apparatus 1 can be further improved.

また、検出用チューブ部材３を溝部２ａに装着する前では、充填部材５２に覆われた検出用チューブ部材３は、車両前後方向の長さＢが、溝部２ａの車両前後方向の長さＡよりも長くなっていることを特徴とする。この構成によれば、検出用チューブ部材３及び充填部材５２と溝部２ａとの嵌合強度を向上させることができ、検出用チューブ部材３の組付け性を良好にすることができる。   Further, before the detection tube member 3 is mounted in the groove portion 2a, the detection tube member 3 covered with the filling member 52 has a length B in the vehicle front-rear direction that is longer than a length A in the vehicle front-rear direction of the groove portion 2a. It is also characterized by being longer. According to this configuration, the fitting strength between the detection tube member 3 and the filling member 52 and the groove portion 2a can be improved, and the assembly property of the detection tube member 3 can be improved.

また、充填部材５２は、バンパアブソーバ２及び検出用チューブ部材３よりも柔らかい柔軟性を有する部材であることを特徴とする。この構成によれば、充填部材５２がバンパアブソーバ２及び検出用チューブ部材３よりも柔らかい材質であるので、溝部２ａ内における検出用チューブ部材３の車両前方側及び後方側に形成される隙間に充填部材５２を配設しても、衝突時におけるバンパアブソーバ２及び検出用チューブ部材３の変形に悪影響を与えない。これにより、車両用衝突検知装置１の衝突検知精度を確実に向上させることができる。   Further, the filling member 52 is a member having a softness softer than the bumper absorber 2 and the detection tube member 3. According to this configuration, since the filling member 52 is made of a material softer than the bumper absorber 2 and the detection tube member 3, the gap formed on the front side and the rear side of the detection tube member 3 in the groove 2a is filled. Even if the member 52 is disposed, the deformation of the bumper absorber 2 and the detection tube member 3 at the time of a collision is not adversely affected. Thereby, the collision detection accuracy of the vehicle collision detection apparatus 1 can be improved with certainty.

なお、上記第３の実施形態では、充填部材５２が検出用チューブ部材３の外周部全体を覆うように配設された場合について説明したが、これに限られず、充填部材５２は、検出用チューブ部材３の外周部のうち少なくとも車両前方側または後方側を覆うように配設されていればよい。   In the third embodiment, the case where the filling member 52 is disposed so as to cover the entire outer peripheral portion of the detection tube member 3 has been described. However, the present invention is not limited to this, and the filling member 52 is a detection tube. What is necessary is just to be arrange | positioned so that the vehicle front side or back side may be covered at least among the outer peripheral parts of the member 3. FIG.

また、検出用チューブ部材３を溝部２ａに装着する前の状態では、溝部２ａの車両前後方向の長さＡよりも、充填部材５２に覆われた検出用チューブ部材３の車両前後方向の長さＢの方が長くなるようにしたが、これに限られず、例えば充填部材５２に覆われた検出用チューブ部材３の車両前後方向の長さＢが、溝部２ａの車両前後方向の長さＡと同じ長さであってもよい。   Further, in the state before the detection tube member 3 is mounted in the groove portion 2a, the length of the detection tube member 3 covered with the filling member 52 in the vehicle front-rear direction is longer than the length A of the groove portion 2a in the vehicle front-rear direction. However, the length B is not limited to this. For example, the length B of the detection tube member 3 covered with the filling member 52 in the vehicle front-rear direction is equal to the length A of the groove 2a in the vehicle front-rear direction. It may be the same length.

本発明は、上記した実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲で種々の変形または拡張を施すことができる。例えば、上記実施形態では、圧力センサ４をバンパレインフォースメント９の後面９ｂにおける左右両端部側に２つ配設したが、これに限られず、圧力センサ４を任意の位置に配置可能である。例えば、圧力センサ４をバンパレインフォースメント９の上面に配置してもよく、また、別の剛性部材に固定してもよい。   The present invention is not limited to the above-described embodiments, and various modifications or expansions can be made without departing from the spirit of the present invention. For example, in the above embodiment, two pressure sensors 4 are disposed on the left and right ends of the rear surface 9b of the bumper reinforcement 9, but the present invention is not limited to this, and the pressure sensor 4 can be disposed at an arbitrary position. For example, the pressure sensor 4 may be disposed on the upper surface of the bumper reinforcement 9 or may be fixed to another rigid member.

１ 車両用衝突検知装置
２ バンパアブソーバ
２ａ 溝部
２ｂ 後面
３ 検出用チューブ部材
３ａ 中空部
４ 圧力センサ
５，５１，５２ 充填部材
６ 衝突検知ＥＣＵ
７ バンパ
８ バンパカバー
９ バンパレインフォースメント
１０ 歩行者保護装置 DESCRIPTION OF SYMBOLS 1 Vehicle collision detection apparatus 2 Bumper absorber 2a Groove part 2b Rear surface 3 Detection tube member 3a Hollow part 4 Pressure sensor 5, 51, 52 Filling member 6 Collision detection ECU
7 Bumper 8 Bumper cover 9 Bumper reinforcement 10 Pedestrian protection device

Claims (14)

車両のバンパ（７）内に配設された衝撃吸収用部材であるバンパアブソーバ（２）と、前記バンパアブソーバに車幅方向に沿って形成された溝部（２ａ）に装着されると共にバンパレインフォースメント（９）の車両前方側に配設される内部に中空部（３ａ）が形成された検出用チューブ部材（３）と、前記検出用チューブ部材の前記中空部内の圧力を検出する圧力センサ（４）とを有し、前記圧力センサによる圧力検出結果に基づいて前記バンパへの物体の衝突を検知する車両用衝突検知装置（１）において、
前記溝部内における前記検出用チューブ部材の車両前方側及び／又は後方側に形成される隙間に充填される充填部材（５，５１，５２）を備えたことを特徴とする車両用衝突検知装置。 A bumper absorber (2) which is an impact absorbing member disposed in a bumper (7) of the vehicle, and a groove (2a) formed in the bumper absorber along the vehicle width direction, and a bumper reinforcement A detection tube member (3) having a hollow portion (3a) formed inside the vehicle (9), and a pressure sensor for detecting the pressure in the hollow portion of the detection tube member (9). 4) and a vehicle collision detection device (1) for detecting a collision of an object with the bumper based on a pressure detection result by the pressure sensor.
A vehicle collision detection device comprising: a filling member (5, 51, 52) filled in a gap formed on the vehicle front side and / or rear side of the detection tube member in the groove. 前記充填部材は、柔軟性を有する部材からなることを特徴とする請求項１に記載の車両用衝突検知装置。   The vehicle collision detection device according to claim 1, wherein the filling member is made of a flexible member. 前記柔軟性を有する部材は、熱可塑性樹脂または軟質樹脂からなることを特徴とする請求項２に記載の車両用衝突検知装置。   The vehicle collision detection device according to claim 2, wherein the member having flexibility is made of a thermoplastic resin or a soft resin. 前記充填部材（５１，５２）は、前記バンパアブソーバ及び前記検出用チューブ部材よりも柔らかい部材からなることを特徴とする請求項２に記載の車両用衝突検知装置。   The vehicle collision detection device according to claim 2, wherein the filling member (51, 52) is made of a softer member than the bumper absorber and the detection tube member. 前記充填部材は、前記検出用チューブ部材の外周部のうち少なくとも車両前方側または後方側を覆うように配設されることを特徴とする請求項１から４のいずれか１項に記載の車両用衝突検知装置。   5. The vehicle according to claim 1, wherein the filling member is disposed so as to cover at least a vehicle front side or a rear side of an outer peripheral portion of the detection tube member. Collision detection device. 前記充填部材（５２）は、前記検出用チューブ部材の外周部全体を覆うように配設されることを特徴とする請求項５に記載の車両用衝突検知装置。   6. The vehicle collision detection device according to claim 5, wherein the filling member (52) is disposed so as to cover the entire outer peripheral portion of the detection tube member. 前記充填部材は、前記溝部の車幅方向全体にわたって設けられることを特徴とする請求項１から６のいずれか１項に記載の車両用衝突検知装置。   The collision detection device for a vehicle according to any one of claims 1 to 6, wherein the filling member is provided over the entire width direction of the groove portion. 前記充填部材（５２）は、前記検出用チューブ部材と予め一体化され、前記検出用チューブ部材を前記溝部内に挿入する際に前記溝部に嵌合することにより前記隙間に充填されたことを特徴とする請求項１から７のいずれか１項に記載の車両用衝突検知装置。   The filling member (52) is integrated with the detection tube member in advance, and the gap is filled by fitting the detection tube member into the groove when the detection tube member is inserted into the groove. The vehicle collision detection device according to any one of claims 1 to 7. 前記充填部材（５，５１）は、前記検出用チューブ部材とは別に前記溝部内に供給されて前記隙間に充填されたことを特徴とする請求項１から７のいずれか１項に記載の車両用衝突検知装置。   The vehicle according to any one of claims 1 to 7, wherein the filling member (5, 51) is supplied into the groove portion separately from the detection tube member and filled in the gap. Collision detection device. 前記充填部材（５）は、熱可塑性樹脂からなり、前記検出用チューブ部材を前記溝部に装着した後に当該溝部に充填されるものであることを特徴とする請求項９に記載の車両用衝突検知装置。   The vehicle collision detection according to claim 9, wherein the filling member (5) is made of a thermoplastic resin and is filled in the groove portion after the detection tube member is mounted in the groove portion. apparatus. 前記充填部材（５１）は、前記検出用チューブ部材を前記溝部に装着する前に当該溝部に配設されるものであることを特徴とすることを特徴とする請求項９に記載の車両用衝突検知装置。   10. The vehicle collision according to claim 9, wherein the filling member (51) is disposed in the groove portion before the detection tube member is mounted in the groove portion. Detection device. 前記充填部材（５２）は、前記検出用チューブ部材を前記溝部に装着する前に前記検出用チューブ部材の外周部のうち少なくとも車両前方側または後方側を覆うように配設されるものであることを特徴とする請求項８に記載の車両用衝突検知装置。   The filling member (52) is disposed so as to cover at least the vehicle front side or the rear side of the outer peripheral portion of the detection tube member before the detection tube member is mounted in the groove. The vehicle collision detection device according to claim 8. 前記充填部材（５２）に覆われた前記検出用チューブ部材は、車両前後方向の長さが前記溝部の車両前後方向の長さよりも長くなっていることを特徴とする請求項１２に記載の車両用衝突検知装置。   The vehicle according to claim 12, wherein the length of the detection tube member covered by the filling member (52) in the vehicle front-rear direction is longer than the length of the groove portion in the vehicle front-rear direction. Collision detection device. 前記溝部は、前記バンパアブソーバの後面（２ｂ）に設けられていることを特徴とする請求項１から１３のいずれか１項に記載の車両用衝突検知装置。   14. The vehicle collision detection device according to claim 1, wherein the groove is provided on a rear surface (2b) of the bumper absorber.
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