JPS63241467A - Collision detector for vehicle - Google Patents
Collision detector for vehicleInfo
- Publication number
- JPS63241467A JPS63241467A JP62074477A JP7447787A JPS63241467A JP S63241467 A JPS63241467 A JP S63241467A JP 62074477 A JP62074477 A JP 62074477A JP 7447787 A JP7447787 A JP 7447787A JP S63241467 A JPS63241467 A JP S63241467A
- Authority
- JP
- Japan
- Prior art keywords
- diagnostic
- circuit
- voltage
- diagnostic pulse
- output
- 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.)
- Granted
Links
Landscapes
- Air Bags (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、車両のエアバックシステム等に用いる衝突検
出装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a collision detection device used in a vehicle airbag system or the like.
（従来の技術）
従来、この種装置として、ＵＳＰ４１６４２６３号によ
り、歪ゲージをピックアップとして用いた加速度センサ
と、その出力側の信号処理回路とを備え、車両の衝突で
加速度センサが設定値以上の加速度を検出したとき、信
号処理回路から出力を発生して、エアバック等の安全装
置を作動させるようにしたものは知られる。(Prior Art) Conventionally, this type of device has been provided with an acceleration sensor using a strain gauge as a pickup and a signal processing circuit on its output side, as disclosed in USP 4164263. It is known to generate an output from a signal processing circuit to activate a safety device such as an air bag when a signal is detected.
（発明が解決しようどする問題点）
ところで、加速度センサーの故障や信号処理回路の断線
等の衝突検出装置の異常の有無を診断する場合、従来は
加速度センサに機械的撮動を与え、信号処理回路からの
出力を測定機器を用いて計測するようにしており、作業
が面倒で通常ユーザーによる衝突検出装置の診断は行わ
れていない。(Problems to be Solved by the Invention) By the way, when diagnosing the presence or absence of an abnormality in the collision detection device, such as a failure of the acceleration sensor or a disconnection of the signal processing circuit, conventionally, mechanical imaging is applied to the acceleration sensor, and signal processing is performed. The output from the circuit is measured using a measuring device, and the work is cumbersome, so users usually do not diagnose the collision detection device.
本発明は、かかる現状に鑑み、異常の有無を自動的に診
断する機能を持った衝突検出装置を提供することをその
目的とする。In view of the current situation, it is an object of the present invention to provide a collision detection device having a function of automatically diagnosing the presence or absence of an abnormality.
（問題点を解決するための手段）
本発明は、上記目的を達成すべく、加速度センｌすと、
該加速度センサの出力側の信号処理回路とを備える車両
の衝突検出装置において、該加速度センサのピックアッ
プを圧電素子で構成し、該圧電素子に該圧電素子の逆圧
電効果を生じさせる診断パルスを入力する診断パルス発
生器と、該信号処理回路の出力を検出する診断回路とを
設けたことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention has the following features:
In a vehicle collision detection device comprising a signal processing circuit on the output side of the acceleration sensor, a pickup of the acceleration sensor is configured with a piezoelectric element, and a diagnostic pulse is input to the piezoelectric element to cause an inverse piezoelectric effect of the piezoelectric element. The present invention is characterized in that it includes a diagnostic pulse generator that detects the output of the signal processing circuit, and a diagnostic circuit that detects the output of the signal processing circuit.
（作 用）
圧電素子に診断パルスが入力されると、逆圧電効果によ
る圧電素子の歪を生じ、この歪により圧電素子から出力
電圧が発生され、信号処理回路を介して出力信号が発生
されるが、圧電素子と信号処理回路との何れか一方でも
故障していると、信号処理回路からは出力信号が発生さ
れず、従って診断パルス発生器からのパルス発生時にお
ける診断回路による信号処理回路の出力検出で衝突検出
装置が正常か否かを診断できる。(Function) When a diagnostic pulse is input to the piezoelectric element, distortion of the piezoelectric element occurs due to the inverse piezoelectric effect, and this distortion generates an output voltage from the piezoelectric element, and an output signal is generated via the signal processing circuit. However, if either the piezoelectric element or the signal processing circuit is malfunctioning, the signal processing circuit will not generate an output signal, and therefore the diagnostic circuit will not be able to output the signal processing circuit when the diagnostic pulse generator generates a pulse. It is possible to diagnose whether the collision detection device is normal or not by detecting the output.
（実施例）
図面は車両のエアパックシステムに本発明装置を適用し
た実施例を示し、第１図を参照して、（１）は加速度セ
ンサのピックアップとしての圧電素子、（２）は該圧電
素子〈１）の出力側の信号処理回路であり、該回路（２
）は、圧電素子（１）の出力端子（１ａ）に接続される
インピーダンス変換器（３）と、その出力側の積分器（
４）と、該積分器〈４）の出力電圧が設定電圧以上にな
ったときハイルベルの信号を出力する第１比較器（５）
と、該第１比較器（５）からのハイレベル信号でオンす
るトランジスタ（６）とで構成され、該トランジスタ（
６）をエアパック用の雷管（７）をバッテリー（８）に
接続する点火回路に介入し、衝突時に加速度センサの可
動部により圧電素子（１）に衝撃力が加えられたとき、
該圧電素子（１）から発生される出力電圧によりこれら
変換器（３）と積分器（４）と第１比較器（５）とを介
してトランジスタ（６）がオンされ、雷管（７）が点火
されるようにした。(Embodiment) The drawings show an embodiment in which the device of the present invention is applied to an air pack system of a vehicle. Referring to FIG. This is a signal processing circuit on the output side of element <1), and the circuit (2)
) is an impedance converter (3) connected to the output terminal (1a) of the piezoelectric element (1), and an integrator (
4), and a first comparator (5) that outputs a Heilbell signal when the output voltage of the integrator (4) exceeds the set voltage.
and a transistor (6) that is turned on by a high-level signal from the first comparator (5).
6) intervenes in the ignition circuit that connects the detonator (7) for the air pack to the battery (8), and when an impact force is applied to the piezoelectric element (1) by the movable part of the acceleration sensor during a collision,
The output voltage generated from the piezoelectric element (1) turns on the transistor (6) via the converter (3), the integrator (4) and the first comparator (5), and the detonator (7) is turned on. Made it ignite.
尚、圧電素子（１）自体が慣性マスにもなるようにして
、加速度センサを圧電素子（１）単体で構成することも
可能である。Note that it is also possible to configure the acceleration sensor by the piezoelectric element (1) alone, so that the piezoelectric element (1) itself also serves as an inertial mass.
図面で（９）は点火回路に介入される接点を有する誤発
防止用の礪械式加速度センサ、（ＩＯはフェールセーフ
リレーを示す。In the drawing, (9) indicates a mechanical acceleration sensor for preventing accidental firing, which has a contact that is inserted into the ignition circuit (IO indicates a fail-safe relay).
前記圧電素子〈１）は、これに逆圧電効果を与えるため
の入力端子（１ｂ）を備えるものとし、該入力端子（１
ｂ）に接続される診断パルス発生器（ｌｖを設けると共
に、前記信号処理回路（２）の出力、即ら前記トランジ
スタ（６）のオンオフを検出する診断回路（Ｉ２１を設
け、前記フェールセーフリレー（ＩＧを該診断回路■に
よりオンオフ制御すると共に、該診断回路（ＩＺにより
制御されるランプ等の警報器０３を設けた。The piezoelectric element (1) is provided with an input terminal (1b) for imparting an inverse piezoelectric effect to the piezoelectric element (1).
b) A diagnostic pulse generator (LV) is provided, which is connected to the fail-safe relay ( The IG is turned on and off by the diagnostic circuit (1), and an alarm 03 such as a lamp controlled by the diagnostic circuit (IZ) is provided.
該診断パルス発生器（＋１）は、例えば車速信号、クラ
ンキング信号、パーキングブレーキ信号から停車中のク
ランキング時を確認して診断パルスを発生すべく構成さ
れており、この診断パルスの前記入力端子（１ｂ）への
入力で圧電素子（１）の出力端子（１ａ）に逆圧電効果
による出力電圧が発生されるようにし、診断パルスの周
期及び電圧を積分器（４）から第１比較器（５）の設定
電圧Ｖ７以上の電圧が出力されるように設定し、かくて
診断パルスの発生によれば、圧電素子（１）及び信号処
理回路（２）に故障が無い限り、トランジスタ（６）が
オンされて、診断回路ａつにバッテリー（８）からの電
圧が入力されるようにし、診断パルスの発生後所定時間
経過しても該診断回路（＋２１に電圧が入力されないと
きは、故障であると判断して、）エールセーフリレー（
ＩＧをオフすると共に、警報器ａ３を作動させるように
した。The diagnostic pulse generator (+1) is configured to generate a diagnostic pulse by confirming cranking while stopped, for example, from a vehicle speed signal, a cranking signal, and a parking brake signal, and is configured to generate a diagnostic pulse by checking the cranking state while the vehicle is stopped. (1b) so that an output voltage is generated at the output terminal (1a) of the piezoelectric element (1) due to the inverse piezoelectric effect, and the period and voltage of the diagnostic pulse are transferred from the integrator (4) to the first comparator ( 5) is set so that a voltage equal to or higher than the set voltage V7 is output, and thus, according to the generation of the diagnostic pulse, unless there is a failure in the piezoelectric element (1) and the signal processing circuit (2), the transistor (6) is turned on so that the voltage from the battery (8) is input to the diagnostic circuit (a), and if no voltage is input to the diagnostic circuit (+21) even after a predetermined period of time has elapsed after the generation of the diagnostic pulse, there is a malfunction. Judging that there is, ) Yell Safe Relay (
I turned off IG and activated alarm a3.
尚、診断パルスが発生されるのは停車中であるため、機
械式加速度センサ（９）の接点はオフされており、雷管
（７）に点火されることは無い。Note that since the diagnostic pulse is generated while the vehicle is stopped, the contact of the mechanical acceleration sensor (9) is turned off and the detonator (7) is not ignited.
第２図は、・車両の走行中等機械式加速度センサ（９）
の接点がオンする可能性の有る状態で診断パルスを発生
するようにした実施例を示し、このものでは信号処理回
路（２）に、第１比較器（５）と並列に第２比較器（ｌ
＠とワンショットタイマａ９との直列接続回路を接続し
、該第２比較器０ルの設定電圧ｖ２を第１比較器（５）
の設定電圧ｖ１より低くして、診断パルスの周期及び電
圧を、積分器（４）からの出力電圧■がｖ２〈■＜ｖ、
の関係になるように設定し、更にワンショットタイマａ
９からの出力パルス巾を雷管（７）の点火に必要な通電
時間よりち短く設定した。Figure 2 shows: Mechanical acceleration sensor for vehicle running (9)
An embodiment is shown in which a diagnostic pulse is generated in a state where there is a possibility that the contact of l
A series connection circuit of @ and one-shot timer a9 is connected, and the set voltage v2 of the second comparator 0 is set to the first comparator (5).
is lower than the set voltage v1, and the period and voltage of the diagnostic pulse are set such that the output voltage from the integrator (4) is v2
Set it so that the relationship is as follows, and also set the one-shot timer a
The output pulse width from 9 was set to be shorter than the energization time required to ignite the detonator (7).
これによれば、診断パルスが圧電素子（１）に入力され
、該素子（１）からの出力電圧で積分器（４）の出力電
圧が第２比較器（ＩΦの設定電圧を上回ったときワンシ
ョットタイマ０９からの出力パルスでトランジスタ（６
）が一時的にオンし、診断回路（１２１による故障診断
が行われ、この際機械式加速度センサク９）の接点がオ
ンしていても、雷管（７）が点火される前にトランジス
タ（６）がオフされ、電管（７）の点火には至らない。According to this, a diagnostic pulse is input to the piezoelectric element (1), and when the output voltage of the integrator (4) exceeds the set voltage of the second comparator (IΦ), one The output pulse from shot timer 09 causes transistor (6
) is temporarily turned on, and a fault diagnosis is performed by the diagnostic circuit (121). At this time, even if the contact of the mechanical acceleration sensor 9 is turned on, the transistor (6) is turned on before the detonator (7) is ignited. is turned off, and the electric tube (7) does not ignite.
尚、診断パルス発生器からのパルス発生時にオフされる
り１ノースイツチを点火回路に介入して、雷管（７）の
誤発を防止するようにしても良い。Incidentally, it is also possible to prevent the detonator (7) from firing erroneously by intervening in the ignition circuit with a 1-no switch that is turned off when a pulse is generated from the diagnostic pulse generator.
（発明の効果）
以上の如く本発明によるときは、加速度レンサ及び信号
処理回路の故障の有無を自動的に診断でき、衝突検出装
置の信頼性を高められ、而もその構成は、診断パルス発
生器と信号処理回路の出力を検出する診断回路とを付加
すれば足り、構造簡単にして安価に得られる効果を有す
る。(Effects of the Invention) As described above, according to the present invention, it is possible to automatically diagnose whether or not there is a failure in the acceleration sensor and the signal processing circuit, and the reliability of the collision detection device is improved. It is sufficient to add a diagnostic circuit for detecting the output of the signal processing circuit and a diagnostic circuit for detecting the output of the signal processing circuit.
第１図は本発明の実施の１例の回路図、第２図はその変
形例の回路図である。
（１）・・・圧電素子 （２）・・・信号処
理回路（１１）・・・診断パルス発生器 ■・・・診
断回路外ンる
第１図FIG. 1 is a circuit diagram of one embodiment of the present invention, and FIG. 2 is a circuit diagram of a modification thereof. (1)...Piezoelectric element (2)...Signal processing circuit (11)...Diagnostic pulse generator ■...Figure 1 outside the diagnostic circuit
Claims (1)
回路とを備える車両の衝突検出装置において、該加速度
センサのピックアップを圧電素子で構成し、該圧電素子
に該圧電素子の逆圧電効果を生じさせる診断パルスを入
力する診断パルス発生器と、該信号処理回路の出力を検
出する診断回路とを設けたことを特徴とする車両の衝突
検出装置。In a vehicle collision detection device comprising an acceleration sensor and a signal processing circuit on the output side of the acceleration sensor, a pickup of the acceleration sensor is configured with a piezoelectric element, and an inverse piezoelectric effect of the piezoelectric element is caused in the piezoelectric element. A collision detection device for a vehicle, comprising a diagnostic pulse generator that inputs diagnostic pulses, and a diagnostic circuit that detects the output of the signal processing circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62074477A JPH0711533B2 (en) | 1987-03-30 | 1987-03-30 | Vehicle collision detection device |
| US07/174,555 US4950914A (en) | 1987-03-30 | 1988-03-29 | Collision detection system for a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62074477A JPH0711533B2 (en) | 1987-03-30 | 1987-03-30 | Vehicle collision detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63241467A true JPS63241467A (en) | 1988-10-06 |
| JPH0711533B2 JPH0711533B2 (en) | 1995-02-08 |
Family
ID=13548388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62074477A Expired - Lifetime JPH0711533B2 (en) | 1987-03-30 | 1987-03-30 | Vehicle collision detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0711533B2 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6472012A (en) * | 1987-09-11 | 1989-03-16 | Matsushita Electric Ind Co Ltd | Acceleration sensor |
| JPH0280965A (en) * | 1988-09-19 | 1990-03-22 | Matsushita Electric Ind Co Ltd | Acceleration sensor |
| JPH02307064A (en) * | 1989-05-23 | 1990-12-20 | Nippondenso Co Ltd | Semiconductor acceleration detecting device |
| JPH046472A (en) * | 1990-04-24 | 1992-01-10 | Matsushita Electric Ind Co Ltd | Acceleration measuring apparatus |
| US5083276A (en) * | 1989-09-06 | 1992-01-21 | Zexel Corporation | System for controlling safety device for vehicle |
| DE4134902A1 (en) * | 1990-11-29 | 1992-06-04 | Mitsubishi Electric Corp | Arrangement for detecting vehicle impact - contains acceleration and motion sensors whose signals are compared to detect acceleration sensor faults, for use with air bag system |
| JPH04231234A (en) * | 1990-05-23 | 1992-08-20 | Messerschmitt Boelkow Blohm Gmbh <Mbb> | Working circuit in safety device for automobile |
| US5155376A (en) * | 1989-06-15 | 1992-10-13 | Diesel Kiki Co., Ltd. | Vehicle safety device actuating circuit with monitoring current regulator |
| US5181011A (en) * | 1990-08-14 | 1993-01-19 | Zexel Corporation | Method for checking the operability of safety system for vehicles |
| US5182459A (en) * | 1990-02-07 | 1993-01-26 | Zexel Corporation | Control system for vehicle safety device |
| JPH0534367A (en) * | 1991-08-01 | 1993-02-09 | Kansei Corp | Protecting device for vehicle occupant |
| DE4237142A1 (en) * | 1991-10-28 | 1993-04-29 | Mitsubishi Electric Corp | Collision detector for vehicle equipped with airbag restraint - has manual switch preventing inflation of airbag, by inhibition of logic circuit which would otherwise respond to signal from accelerometer |
| DE4244264A1 (en) * | 1991-12-26 | 1993-07-01 | Mitsubishi Electric Corp | Fault diagnosis device for vehicle passenger safety device, e.g. air bag - uses internally generated diagnostic input signal to evaluate normal or faulty trigger device |
| US5406127A (en) * | 1991-06-10 | 1995-04-11 | Mitsubishi Denki Kabushiki Kaisha | Passenger protecting apparatus |
| US6050144A (en) * | 1997-06-04 | 2000-04-18 | Matsushita Electric Industrial Co., Ltd. | Acceleration sensor |
| JP2005526228A (en) * | 2001-08-27 | 2005-09-02 | ローズマウント インコーポレイテッド | Diagnosis of piezoelectric sensors |
| WO2008139743A1 (en) * | 2007-05-10 | 2008-11-20 | Mitsubishi Electric Corporation | Vehicle condition detecting unit and occupant protection apparatus including the unit |
| JP2010197111A (en) * | 2009-02-23 | 2010-09-09 | Nec Corp | Event recording device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3120622A (en) * | 1960-03-29 | 1964-02-04 | Gulton Ind Inc | Self-calibrating accelerometer |
| US3911391A (en) * | 1972-05-05 | 1975-10-07 | Messerschmitt Boelkow Blohm | Apparatus for actuating vehicle safety devices |
| JPS55124996U (en) * | 1979-02-23 | 1980-09-04 | ||
| JPS6179159A (en) * | 1984-09-27 | 1986-04-22 | Nachi Fujikoshi Corp | Self-diagnostic sensor |
-
1987
- 1987-03-30 JP JP62074477A patent/JPH0711533B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3120622A (en) * | 1960-03-29 | 1964-02-04 | Gulton Ind Inc | Self-calibrating accelerometer |
| US3911391A (en) * | 1972-05-05 | 1975-10-07 | Messerschmitt Boelkow Blohm | Apparatus for actuating vehicle safety devices |
| JPS55124996U (en) * | 1979-02-23 | 1980-09-04 | ||
| JPS6179159A (en) * | 1984-09-27 | 1986-04-22 | Nachi Fujikoshi Corp | Self-diagnostic sensor |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6472012A (en) * | 1987-09-11 | 1989-03-16 | Matsushita Electric Ind Co Ltd | Acceleration sensor |
| JPH0280965A (en) * | 1988-09-19 | 1990-03-22 | Matsushita Electric Ind Co Ltd | Acceleration sensor |
| JPH02307064A (en) * | 1989-05-23 | 1990-12-20 | Nippondenso Co Ltd | Semiconductor acceleration detecting device |
| US5155376A (en) * | 1989-06-15 | 1992-10-13 | Diesel Kiki Co., Ltd. | Vehicle safety device actuating circuit with monitoring current regulator |
| US5083276A (en) * | 1989-09-06 | 1992-01-21 | Zexel Corporation | System for controlling safety device for vehicle |
| US5182459A (en) * | 1990-02-07 | 1993-01-26 | Zexel Corporation | Control system for vehicle safety device |
| JPH046472A (en) * | 1990-04-24 | 1992-01-10 | Matsushita Electric Ind Co Ltd | Acceleration measuring apparatus |
| JPH04231234A (en) * | 1990-05-23 | 1992-08-20 | Messerschmitt Boelkow Blohm Gmbh <Mbb> | Working circuit in safety device for automobile |
| US5181011A (en) * | 1990-08-14 | 1993-01-19 | Zexel Corporation | Method for checking the operability of safety system for vehicles |
| DE4134902A1 (en) * | 1990-11-29 | 1992-06-04 | Mitsubishi Electric Corp | Arrangement for detecting vehicle impact - contains acceleration and motion sensors whose signals are compared to detect acceleration sensor faults, for use with air bag system |
| US5406127A (en) * | 1991-06-10 | 1995-04-11 | Mitsubishi Denki Kabushiki Kaisha | Passenger protecting apparatus |
| JPH0534367A (en) * | 1991-08-01 | 1993-02-09 | Kansei Corp | Protecting device for vehicle occupant |
| DE4237142A1 (en) * | 1991-10-28 | 1993-04-29 | Mitsubishi Electric Corp | Collision detector for vehicle equipped with airbag restraint - has manual switch preventing inflation of airbag, by inhibition of logic circuit which would otherwise respond to signal from accelerometer |
| DE4244264A1 (en) * | 1991-12-26 | 1993-07-01 | Mitsubishi Electric Corp | Fault diagnosis device for vehicle passenger safety device, e.g. air bag - uses internally generated diagnostic input signal to evaluate normal or faulty trigger device |
| US5381334A (en) * | 1991-12-26 | 1995-01-10 | Mitsubishi Denki Kabushiki Kaisha | Fault diagnosis apparatus for crew protecting apparatus in vehicle |
| DE4244264C2 (en) * | 1991-12-26 | 1999-08-26 | Mitsubishi Electric Corp | Fault diagnostic device for an occupant protection device in a vehicle |
| US6050144A (en) * | 1997-06-04 | 2000-04-18 | Matsushita Electric Industrial Co., Ltd. | Acceleration sensor |
| US6227051B1 (en) | 1997-06-04 | 2001-05-08 | Matsushita Electric Industrial Co., Ltd. | Acceleration sensor |
| JP2005526228A (en) * | 2001-08-27 | 2005-09-02 | ローズマウント インコーポレイテッド | Diagnosis of piezoelectric sensors |
| WO2008139743A1 (en) * | 2007-05-10 | 2008-11-20 | Mitsubishi Electric Corporation | Vehicle condition detecting unit and occupant protection apparatus including the unit |
| JPWO2008139743A1 (en) * | 2007-05-10 | 2010-07-29 | 三菱電機株式会社 | Vehicle state detection device and occupant protection device equipped with the same |
| JP5073740B2 (en) * | 2007-05-10 | 2012-11-14 | 三菱電機株式会社 | Crew protection device and pedestrian protection device |
| US9340188B2 (en) | 2007-05-10 | 2016-05-17 | Mitsubishi Electric Corporation | Occupant protective apparatus and pedestrian protective apparatus |
| JP2010197111A (en) * | 2009-02-23 | 2010-09-09 | Nec Corp | Event recording device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0711533B2 (en) | 1995-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63241467A (en) | Collision detector for vehicle | |
| US4873452A (en) | Collision detector for a vehicle | |
| US4641041A (en) | Circuit arrangement for registering false release signals for a restraint system | |
| US4950914A (en) | Collision detection system for a vehicle | |
| JP2744170B2 (en) | Modifiable airbag ignition circuit | |
| US5428340A (en) | Apparatus for manually disabling and automatically enabling an air-bag system | |
| KR100230564B1 (en) | Test method and circuit device for passenger safety system of vehicle | |
| JP2787993B2 (en) | Air bag ignition circuit | |
| JPH0639245B2 (en) | Occupant protection device operating status recording device | |
| JPH05170045A (en) | Starting device for vehicule occupant protecting device | |
| JP2779283B2 (en) | Occupant protection device | |
| JPH04362443A (en) | Occupant protection device | |
| US3774151A (en) | Diagnostic firing circuit adapted for use with inflatable restraint systems in vehicles | |
| JPH0669788B2 (en) | Vehicle safety device | |
| JPH04203969A (en) | Device for detecting collision of vehicle | |
| JP2003511290A (en) | In or improvement of vehicle safety devices | |
| JP2773518B2 (en) | Method and apparatus for detecting acceleration | |
| JP3176415B2 (en) | Airbag ignition monitor circuit | |
| JPH0490943A (en) | Fault diagnosis circuit | |
| JPH076030Y2 (en) | Failure diagnosis circuit for vehicle occupant protection device | |
| JPH08142794A (en) | Diagnosis circuit for runaway detecting circuit | |
| JPH0798467B2 (en) | Vehicle occupant protection device diagnostic circuit | |
| JP4302414B2 (en) | Failure detection device for occupant protection device | |
| JP3929591B2 (en) | Crew protection device | |
| JPH0637017Y2 (en) | Air back system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080208 Year of fee payment: 13 |