KR100381251B1 - Sensor for detecting impact in an air bag for a motor vehicle - Google Patents

Sensor for detecting impact in an air bag for a motor vehicle Download PDF

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Publication number
KR100381251B1
KR100381251B1 KR10-2000-0077976A KR20000077976A KR100381251B1 KR 100381251 B1 KR100381251 B1 KR 100381251B1 KR 20000077976 A KR20000077976 A KR 20000077976A KR 100381251 B1 KR100381251 B1 KR 100381251B1
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KR
South Korea
Prior art keywords
airbag
collision
vehicle
bump
hollow part
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KR10-2000-0077976A
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Korean (ko)
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KR20020048745A (en
Inventor
정진성
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기아자동차주식회사
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Priority to KR10-2000-0077976A priority Critical patent/KR100381251B1/en
Publication of KR20020048745A publication Critical patent/KR20020048745A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
    • 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
    • B60R19/483—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 with obstacle sensors of electric or electronic type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01013—Means for detecting collision, impending collision or roll-over

Abstract

본 발명은 자동차의 충돌을 감지하여 탑승객의 2차 충돌을 방지하는 에어백이 작동되도록 에어백의 작동 신호를 발생시키는 제어부로 충돌 발생 신호를 입력하는 자동차용 에어백의 충돌감지센서에 관한 것으로, 자동차의 범프 내부에 형성되고 소통공을 통해 외부와 소통되는 중공부; 및 중공부의 소통공 일측에 설치되고 제어부와 전기적으로 접속되어 있으며, 범프 외부와 중공부 내의 압력차에 의해 작동되는 접점식 릴레이를 포함한다.The present invention relates to a collision detection sensor of an automobile airbag that inputs a collision occurrence signal to a control unit that generates an operation signal of the airbag so that an airbag that detects a collision of the vehicle and prevents a secondary collision of passengers is operated. A hollow part formed inside and communicating with the outside through a communication hole; And a contact relay installed at one side of the communication hole of the hollow part and electrically connected to the control unit and operated by a pressure difference in the outside of the bump and the hollow part.

Description

자동차용 에어백의 충돌감지센서{Sensor for detecting impact in an air bag for a motor vehicle}Sensor for detecting impact in an air bag for a motor vehicle}

본 발명은 자동차용 에어백에 관한 것이고, 보다 구체적으로는 충돌에 의한 충격을 감지하여 에어백 본체에 작동 신호를 인가하는 충돌감지센서에 관한 것이다.The present invention relates to a vehicle airbag, and more particularly to a collision detection sensor for detecting an impact caused by a collision to apply an operation signal to the airbag body.

자동차용 에어백은 자동차의 충돌시 관성에 의해 탑승자의 신체가 전방으로 이동되면서 발생되는 2차 충격으로부터 탑생자의 신체를 보호하기 위한 장치이다.The airbag for a vehicle is a device for protecting the body of the top person from the secondary shock generated when the body of the occupant is moved forward by the inertia during the collision of the vehicle.

이러한 자동차용 에어백은, 도 1에 도시된 바와 같이, 운전석(1) 전방의 스티어링 휠(2) 및 조수석 전방의 인스트루먼트 패널(3)에 설치된 에어백 모듈(4a, 4b)과 차체에 설치된 충돌 감지 센서(5a, 5b), 및 제어부(미도시)를 포함한다. 에어백 모듈(4a, 4b)은 질소 가스를 발생시키는 인플레이터(inflator)와 인플레이터에서 발생된 질소 가스에 의해 팽창되는 백을 가진다.As shown in FIG. 1, such a vehicle airbag includes an airbag module 4a and 4b installed in a steering wheel 2 in front of a driver's seat 1 and an instrument panel 3 in front of a passenger seat and a collision detection sensor installed in a vehicle body. 5a, 5b, and a controller (not shown). The airbag modules 4a and 4b have an inflator for generating nitrogen gas and a bag inflated by nitrogen gas generated in the inflator.

충돌감지센서(5a, 5b)는 크게 전자식과 전기식 센서 및 기계식 등으로 구분되며, 자동차의 전방 범프나 인스트루먼트 패널(3) 등에 설치되어 있다.The collision detection sensors 5a and 5b are largely classified into electronic, electric sensors, mechanical, and the like, and are installed on the front bump of the vehicle, the instrument panel 3, and the like.

자동차에 충돌 사고가 발생되면 충돌 감지 센서(5a, 5b)에서 감지된 충격 데이터가 제어부로 입력된다. 제어부는 입력된 충격이 기준치 이상이면 인플레이터에 작동 신호를 인가한다. 인플레이터가 작동되면 질소 가스가 발생되어 백 내부로 유입되며, 이에 따라 백이 순간적으로 팽창되어 탑승객의 신체가 전방으로 이동되는 것을 방지함으로써 탑승자의 신체가 상해를 입지 않도록 보호한다.When a collision accident occurs in the vehicle, shock data detected by the collision detection sensors 5a and 5b is input to the controller. The controller applies an operation signal to the inflator if the input shock is greater than or equal to the reference value. When the inflator is activated, nitrogen gas is generated and introduced into the bag, thereby protecting the occupant's body from injury by preventing the bag from inflating momentarily and moving the passenger's body forward.

그런데, 상기와 같은 자동차용 에어백에 있어서, 자동차의 충돌을 감지하는 센서는 여러 가지 방식과 구조의 것이 있지만 모두 그 구성가 복잡하여 제조하기가 까다로우며, 가격이 비싸다는 단점이 있다.By the way, in the airbag for automobiles as described above, the sensor for detecting the collision of the vehicle has a variety of ways and structures, but all have a disadvantage that the configuration is complicated and difficult to manufacture, and expensive.

본 발명은 상기와 같은 점을 감안하여 안출된 것으로, 그 구성이 매우 간단하여 저렴한 가격으로 용이하게 제조될 수 있는 자동차용 에어백의 충돌 감지 센서를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide a collision detection sensor of an airbag for an automobile that can be easily manufactured at a low cost due to its configuration.

도 1은 에어백이 설치된 자동차를 도시한 사시도.1 is a perspective view of a vehicle with an airbag installed.

도 2는 본 발명의 일 실시예에 따른 자동차용 에어백의 충돌감지센서를 도시한 단면도.Figure 2 is a cross-sectional view showing a collision detection sensor of a vehicle airbag according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

7 : 에어백 모듈 8 : 제어부7: airbag module 8: control unit

9 : 범프 12 : 중공부9 bump 12 hollow part

13 : 소통공 14 : 릴레이13: communicator 14: relay

상기의 목적을 달성하기 위한 본 발명에 따른 자동차용 에어백의 충돌감지센서는, 자동차의 충돌을 감지하여 탑승객의 2차 충돌을 방지하는 에어백이 작동되도록 에어백의 작동 신호를 발생시키는 제어부로 충돌 발생 신호를 입력하는 것으로, 자동차의 범프 내부에 형성되고 소통공을 통해 외부와 소통되는 중공부; 및 중공부의 소통공 일측에 설치되고 제어부와 전기적으로 접속되어 있으며, 범프 외부와 중공부 내의 압력차에 의해 작동되는 접점식 릴레이를 포함한다.Collision detection sensor of a vehicle airbag according to the present invention for achieving the above object, the collision occurrence signal to the control unit for generating an operation signal of the airbag to operate the airbag to detect the collision of the vehicle to prevent secondary collision of the passenger By entering the hollow portion is formed inside the bump of the vehicle and communicated with the outside through a communication hole; And a contact relay installed at one side of the communication hole of the hollow part and electrically connected to the control unit and operated by a pressure difference in the outside of the bump and the hollow part.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

도 2는 본 발명의 일 실시예에 따른 자동차용 에어백의 충돌감지센서를 도시한다.2 illustrates a collision detection sensor of a vehicle airbag according to an embodiment of the present invention.

도시된 바와 같이, 본 발명의 일 실시예에 따른 자동차용 에어백의 충돌감지센서는 차체 전방의 범프(9) 내부에 형성되는 중공부(12)와 릴레이(14)를 포함하고 있다.As shown, the collision detection sensor of the vehicle airbag according to an embodiment of the present invention includes a hollow portion 12 and a relay 14 formed in the bump 9 in front of the vehicle body.

중공부(12)는 범프(9) 내부에 소정 크기로 형성되어 있으며, 소통공(13)을 통해 범프(9)의 외부와 소통되어 있다.The hollow part 12 is formed to a predetermined size inside the bump 9 and communicates with the outside of the bump 9 through the communication hole 13.

릴레이(14)는 소통공(13) 내부에 설치되어 있으며, 에어백의 제어부(8)와 전기적으로 접속되어 있다. 이 릴레이(14)는 범프(9) 외부와 중공부(12) 내의 압력차에 의해 작동되는 접점식 릴레이다.The relay 14 is provided inside the communication hole 13 and is electrically connected to the control unit 8 of the airbag. This relay 14 is a contact relay operated by the pressure difference outside the bump 9 and in the hollow part 12.

만약, 자동차에 정면 충돌이 발생되면 그 충격에 의해 범프(9)가 밀려들어가게 된다. 이에 따라 중공부(12)도 변형되면서 그 부피가 줄어들게 되고 중공부(12) 내의 공기는 소통공(13)을 통해 외부로 빠져나가게 된다. 충돌에 의한 충격이 적으면 중공부(12)의 변형이 적고 변형 속도도 낮아 중공부(12)와 외부의 압력차가 발생되지 않으나, 충돌에 의한 충격이 크면 중공부(12)가 매우 빠르게 수축되면서 중공부(12) 내의 공기도 매우 빠른 속도로 배출된다. 이에 따라 범프(9) 외부의 대기압과 중공부(12) 내의 공기 압력에 차이가 발생되고 이 압력차가 소정치 이상인 경우 릴레이(14)는 작동되어 온(On)된다. 릴레이(14)가 온되면, 이 신호는 에어백의 제어부(8)로 입력되고 제어부(8)는 에어백 모듈(7)에 작동 신호를 인가한다. 이에 따라, 에어백 모듈(7)의 인플레이터에서 가스가 발생되어 백이 팽창됨으로써, 탑승객의 2차 충돌에 의한 상해를 방지한다.If a frontal collision occurs in the vehicle, the bump 9 is pushed in by the impact. Accordingly, as the hollow part 12 is also deformed, its volume is reduced, and the air in the hollow part 12 escapes through the communication hole 13 to the outside. When the impact due to the collision is small, the deformation of the hollow part 12 is small and the deformation speed is low, so that the pressure difference between the hollow part 12 and the outside does not occur. Air in the hollow part 12 is also discharged at a very high speed. As a result, a difference occurs in the atmospheric pressure outside the bump 9 and the air pressure in the hollow portion 12, and when the pressure difference is more than a predetermined value, the relay 14 is operated on. When the relay 14 is turned on, this signal is input to the control unit 8 of the airbag and the control unit 8 applies an operation signal to the airbag module 7. Accordingly, gas is generated in the inflator of the airbag module 7 and the bag is inflated, thereby preventing injuries due to secondary collision of the passengers.

상기된 바와 같은 본 발명에 따른 자동차용 에어백의 충돌감지센서는, 범프 내부에 범프의 일부로 형성될 수 있으며 그 구조가 매우 간단할 뿐만 아니라 저렴한 가격으로 용이하게 제조될 수 있는 장점이 있다.The collision detection sensor of a vehicle airbag according to the present invention as described above, can be formed as a part of the bump inside the bump and has the advantage that the structure is very simple and can be easily manufactured at a low price.

이상에서는, 본 발명을 특정의 바람직한 실시예에 대해서 도시하고 설명하였다. 그러나, 본 발명은 상술한 실시예에만 한정되는 것은 아니며, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 이하의 특허청구범위에 기재된 본 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경실시할 수 있을 것이다.In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited only to the above-described embodiments, and those skilled in the art to which the present invention pertains may vary without departing from the spirit of the technical idea of the present invention described in the claims below. It may be changed.

Claims (1)

자동차의 충돌을 감지하여 탑승객의 2차 충돌을 방지하는 에어백이 작동되도록 에어백의 작동 신호를 발생시키는 제어부로 충돌 발생 신호를 입력하는 것으로By inputting a collision occurrence signal to a control unit that generates an operation signal of the airbag so that an airbag that detects a collision of the vehicle and prevents a secondary collision of passengers is activated. 자동차의 범프 내부에 형성되고 소통공을 통해 외부와 소통되는 중공부; 및A hollow part formed inside the bump of the vehicle and communicating with the outside through a communication hole; And 상기 중공부의 소통공 일측에 설치되고 상기 제어부와 전기적으로 접속되어 있으며, 범프 외부와 중공부 내의 압력차에 의해 작동되는 접점식 릴레이를 포함하는 자동차용 에어백의 충돌감지센서.The collision detection sensor of the vehicle airbag is installed on one side of the communication hole of the hollow portion and electrically connected to the control unit, the contact relay which is operated by the pressure difference in the outside of the bump and the hollow portion.
KR10-2000-0077976A 2000-12-18 2000-12-18 Sensor for detecting impact in an air bag for a motor vehicle KR100381251B1 (en)

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