JP4670940B2 - 電子式セーフィングシステム - Google Patents
電子式セーフィングシステム Download PDFInfo
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- JP4670940B2 JP4670940B2 JP2008289031A JP2008289031A JP4670940B2 JP 4670940 B2 JP4670940 B2 JP 4670940B2 JP 2008289031 A JP2008289031 A JP 2008289031A JP 2008289031 A JP2008289031 A JP 2008289031A JP 4670940 B2 JP4670940 B2 JP 4670940B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- voltage
- circuit
- safing
- comparison circuit
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- 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.)
- Expired - Fee Related
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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
-
- 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
- B60R2021/01027—Safing sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Description
Claims (8)
- 衝突に伴って変化する物理量を検出し、検出結果に応じた電圧を出力するセーフィングセンサと、
直列接続された複数の分圧抵抗からなり、一端が電源に接続されるとともに、他端が接地され、基準電圧を設定する分圧回路と、前記セーフィングセンサの出力電圧を、前記分圧回路によって設定された前記基準電圧と比較し、比較結果に応じた信号を出力するコンパレータとからなる比較回路と、
前記セーフィングセンサの出力電圧と前記比較回路の出力信号とに基づいて衝突を判定するマイクロコンピュータと、
を備えた電子式セーフィングシステムにおいて、
前記セーフィングセンサの出力端子は、前記比較回路の入力端子に接続され、
前記マイクロコンピュータは、前記比較回路の入力端子と前記セーフィングセンサの出力端子に接続される、内部レジスタの設定で入出力設定可能なA/Dポートを有し、前記比較回路の診断のときには、入出力設定可能な前記A/Dポートを出力ポートに設定し、入出力設定可能な前記A/Dポートから診断のための所定電圧を出力するとともに、前記比較回路の出力信号に基づいて前記比較回路を診断し、診断において、前記比較回路が正常であると判断すると、入出力設定可能な前記A/Dポートをアナログ入力ポートに変更し、前記セーフィングセンサの出力電圧を入力することを特徴とする電子式セーフィングシステム。 - 前記A/Dポートから診断のために出力される所定電圧は、前記分圧回路によって設定された前記基準電圧よりも高いことを特徴とする請求項1に記載の電子式セーフィングシステム。
- 前記コンパレータは、前記分圧回路の前記分圧抵抗が短絡故障又は断線故障をした場合に、出力をLoレベルに飽和させることを特徴とする請求項1に記載の電子式セーフィングシステム。
- 前記コンパレータは、反転入力端子が前記分圧回路を構成する複数の前記分圧抵抗の直列接続点のいずれかに接続されるとともに、非反転入力端子が前記比較回路の入力端子を、出力端子が前記比較回路の出力端子をそれぞれ構成することを特徴とする請求項1〜3のいずれか1項に記載の電子式セーフィングシステム。
- 前記コンパレータは、非反転入力端子が前記分圧回路を構成する複数の前記分圧抵抗の直列接続点のいずれかに接続されるとともに、反転入力端子が前記比較回路の入力端子を、出力端子が前記比較回路の出力端子をそれぞれ構成することを特徴とする請求項1〜3のいずれか1項に記載の電子式セーフィングシステム。
- 前記マイクロコンピュータは、前記コンパレータの出力信号に基づいて前記分圧回路及び前記コンパレータの少なくともいずれかを診断することを特徴とする請求項1〜5のいずれか1項に記載の電子式セーフィングシステム。
- 前記セーフィングセンサの出力端子は、保護抵抗を介して前記比較回路の入力端子に接続され、前記マイクロコンピュータの入出力設定可能な前記A/Dポートは、前記保護抵抗の前記比較回路側に接続されることを特徴とする請求項1〜6のいずれか1項に記載の電子式セーフィングシステム。
- 車両に搭載され、車両への衝突を検出し、検出結果に基づいて乗員保護装置の起動回路に起動信号を出力することを特徴とする請求項1〜7のいずれか1項に記載の電子式セーフィングシステム。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008289031A JP4670940B2 (ja) | 2008-11-11 | 2008-11-11 | 電子式セーフィングシステム |
US12/590,171 US8180520B2 (en) | 2008-11-11 | 2009-11-03 | Electronic safing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008289031A JP4670940B2 (ja) | 2008-11-11 | 2008-11-11 | 電子式セーフィングシステム |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010115967A JP2010115967A (ja) | 2010-05-27 |
JP4670940B2 true JP4670940B2 (ja) | 2011-04-13 |
Family
ID=42165968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008289031A Expired - Fee Related JP4670940B2 (ja) | 2008-11-11 | 2008-11-11 | 電子式セーフィングシステム |
Country Status (2)
Country | Link |
---|---|
US (1) | US8180520B2 (ja) |
JP (1) | JP4670940B2 (ja) |
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-
2009
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Also Published As
Publication number | Publication date |
---|---|
US20100121521A1 (en) | 2010-05-13 |
US8180520B2 (en) | 2012-05-15 |
JP2010115967A (ja) | 2010-05-27 |
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