JP2005114394A - 慣性センサ及びそれを用いた複合センサ - Google Patents
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- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
- G01C19/5607—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using vibrating tuning forks
- G01C19/5614—Signal processing
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- 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
- G01P15/125—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 by capacitive pick-up
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
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- 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
- G01P2015/0805—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration
- G01P2015/0822—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining out-of-plane movement of the mass
- G01P2015/0825—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining out-of-plane movement of the mass for one single degree of freedom of movement of the mass
- G01P2015/0828—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining out-of-plane movement of the mass for one single degree of freedom of movement of the mass the mass being of the paddle type being suspended at one of its longitudinal ends
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- 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
- G01P2015/0805—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration
- G01P2015/0822—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining out-of-plane movement of the mass
- G01P2015/084—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 being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining out-of-plane movement of the mass the mass being suspended at more than one of its sides, e.g. membrane-type suspension, so as to permit multi-axis movement of the mass
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Abstract
【解決手段】交流バイアス信号電圧を同期復調器24よりも前に加えることにより、検知素子6または検出回路27の少なくともいずれか1つの異常を検出するための診断信号を供給する自己診断回路41を備えるため、慣性センサのセンサ出力端子26から予め決められたDCオフセット信号が得られるかどうかを監視するだけで、センサ自体に異常がないかどうかを能動的に診断することができる。
【選択図】図1
Description
図1は本発明の実施の形態1における慣性センサのブロック図、図2は同センサを構成する検知素子の等価回路図、図3は同センサの各部の動作波形図、図4は同センサにおいてY点、Z点で断線した場合の各部の動作波形図、図5は同センサにおいて外部から診断要求信号が加えられた時の各部の動作波形図である。
図6は本発明の実施の形態2における慣性センサのブロック図である。本実施の形態において、検出回路や自己診断回路は前述の実施の形態1と同様に構成されるため、異なる部分についてのみ詳述する。
図7は本発明の実施の形態3における慣性センサのブロック図である。本実施の形態において、前述の実施の形態1、2と同様な構成の部分には同一番号を付し詳細な説明を省略し、異なる部分についてのみ詳述する。
図8は本発明の実施の形態4における複合センサのブロック図、図9は同センサの各部の動作波形図である。本実施の形態において、前述の実施の形態1と同様な構成の部分には同一番号を付し詳細な説明を省略し、異なる部分についてのみ詳述する。
2a,51 第1の検出電極
2b,52 第2の検出電極
3a,3b 第1、第2の出力端子
4,53 可動部
4a,58 第1の可動電極
4b,59 第2の可動電極
5 入力端子
6 検知素子
10,73 電源端子
11,74 グランド端子
12,71 ドライブ回路
13 位相遷移器
20a,20b カレントアンプ
21 差動検出器
22 差動型検出器
23 利得増幅器
24 同期復調器
25 出力増幅器
26 センサ出力端子
27,72 検出回路
30 減衰器
31 コンデンサ
32,64 開閉器
33,65 診断端子
34,36 整流器
35,37 比較器
38 理論和回路
39 フェイル出力端子
40 論理和回路ブロック
41 自己診断回路
54,55 支持部
56 可動電極
57 付加質量部
60 第1の抵抗
61 接続点
62 第2の抵抗
63 グランド
70 振動素子
75 音叉型角速度センサ
80,90 第1、第2の慣性センサ
91,92 結合容量
Claims (18)
- 第1及び第2のコンデンサ部を有し、前記第1のコンデンサ部が固定部に設けられた第1の検出電極と可動部に設けられた可動電極よりなり、前記第2のコンデンサ部が前記固定部に設けられた第2の検出電極と前記可動部に設けられた可動電極よりなるように構成された検知素子と、前記検知素子の可動電極に交流バイアス信号電圧を印加するためのドライブ回路と、前記検知素子に印加された加速度に応じて前記可動電極が変位し、前記第1の検出電極に発生する電荷量が増加する場合は前記第2の検出電極に発生する電荷量が減少し、逆に前記第1の検出電極に発生する電荷量が減少する場合は前記第2の検出電極に発生する電荷量が増加するように構成された前記第1、第2の検出電極の電荷量の差を検出するための差動型検出器と前記交流バイアス信号電圧に同期し前記差動型検出器の出力信号を同期復調するための同期復調器と前記同期復調器からの出力信号を調整する出力増幅器とを有する検出回路と、前記交流バイアス信号電圧を前記同期復調器よりも前に加えることにより、前記検知素子または前記検出回路の少なくともいずれか1つの異常を検出するための診断信号を供給する自己診断回路とを備えた慣性センサ。
- 固定部に設けられた第1、第2の検出電極は所定の間隙を有して対向し、可動部に設けられた可動電極は前記第1、第2の検出電極間のほぼ中間に、かつ、前記第1、第2の検出電極にそれぞれ対向するように配置され、対向する前記第1、第2の検出電極面に直交する方向に加速度が印加されることにより、前記可動電極面が前記第1、第2の検出電極面に直交する方向に変位するように構成された請求項1に記載の慣性センサ。
- 固定部に設けられた第1、第2の検出電極は同一平面内に所定の間隙を設けて配置され、可動部の両端が前記固定部により支持されるとともに、前記可動部に設けられた可動電極は所定の間隙を有して前記第1、第2の検出電極とそれぞれ対向し、さらに前記可動部に設けられた前記可動電極とは反対側に付加質量部が設けられ、前記第1、第2の検出電極面に平行な方向に加速度が印加されることにより、前記可動部に設けられた前記可動電極が前記付加質量部を中心に前記第1、第2の検出電極面の方向に回転し、回転する前記可動電極面の一端側が前記第1の検出電極面に近づく場合は前記可動電極面の他端側が前記第2の検出電極面から遠ざかる方向に変位し、逆に前記可動電極面の一端側が前記第1の検出電極面から遠ざかる場合は前記可動電極面の他端側が前記第2の検出電極面に近づく方向に変位するように構成された請求項1に記載の慣性センサ。
- 固定部、可動部は、水晶、シリコンまたはセラミックスからなる請求項1に記載の慣性センサ。
- 自己診断回路は、ドライブ回路から出力される交流バイアス信号電圧を調整するための調整器と、この調整器からの信号を同期復調器より前に加えるための注入器とからなる請求項1に記載の慣性センサ。
- 自己診断回路を動作状態または非動作状態のいずれかであるように切替える切替器をさらに備え、前記切替器は調整器と注入器との間に配置された請求項5に記載の慣性センサ。
- 切替器は外部からの操作に応じて、ドライブ回路から出力される交流バイアス信号電圧を注入器に対して接続または切断する開閉器である請求項6に記載の慣性センサ。
- 切替器は外部からの操作に応じて、ドライブ回路から出力される交流バイアス信号電圧を注入器に対して一定時間接続または切断するためのタイマー回路を備えた開閉器である請求項6に記載の慣性センサ。
- 調整器は減衰器または位相遷移器である請求項5に記載の慣性センサ。
- 注入器はコンデンサである請求項5に記載の慣性センサ。
- 注入器は抵抗器である請求項5に記載の慣性センサ。
- 自己診断回路には、ドライブ回路と検知素子における異常を常時監視し外部に診断信号を出力するために、交流バイアス信号電圧のレベルを監視するドライブ系判定器と、差動型検出器の出力信号のレベルを監視する検出系判定器と、前記ドライブ系判定器と検出系判定器の出力を外部に出力する論理和回路とをさらに備えた請求項1に記載の慣性センサ。
- 第1及び第2のコンデンサ部を有し、前記第1のコンデンサ部が固定部に設けられた第1の検出電極と可動部に設けられた第1の可動電極よりなり、前記第2のコンデンサ部が前記固定部に設けられた第2の検出電極と前記可動部に設けられた第2の可動電極よりなり、前記第1、第2の検出電極は前記固定部の同一平面内に所定の間隙を設けて配置され、前記可動部の両端が前記固定部により支持されるとともに、前記第1、第2の可動電極は前記可動部の同一平面内に所定の間隙を設けて配置され、かつ、前記第1、第2の検出電極とそれぞれ対向し、さらに前記可動部に設けられた前記第1、第2の可動電極とは反対側に付加質量部が設けられ、前記第1、第2の検出電極面に平行な方向に加速度が印加されることにより、前記第1、第2の可動電極が前記付加質量部を中心に前記第1、第2の検出電極面の方向に回転し、回転する前記第1の可動電極面が前記第1の検出電極面に近づく場合は前記第2の可動電極面が前記第2の検出電極面から遠ざかる方向に変位し、逆に前記第1の可動電極面が前記第1の検出電極面から遠ざかる場合は前記第2の可動電極面が前記第2の検出電極面に近づく方向に変位するように構成された検知素子と、前記第1、第2の可動電極にそれぞれに交流バイアス信号電圧を印加するためのドライブ回路と、前記第1、第2の検出電極面に平行な方向に印加された加速度に応じて前記第1、第2の可動電極が変位し、前記第1の検出電極に発生する電荷量が増加する場合は前記第2の検出電極に発生する電荷量が減少し、逆に前記第1の検出電極に発生する電荷量が減少する場合は前記第2の検出電極に発生する電荷量が増加する前記第1、第2の検出電極の電荷量の差を検出するための差動型検出器と前記交流バイアス信号電圧に同期し前記差動型検出器の出力信号を同期復調するための同期復調器と前記同期復調器からの出力信号を調整する出力増幅器とを有する検出回路と、前記ドライブ回路と前記第1の可動電極または第2の可動電極のいずれかとの間に前記交流バイアス信号電圧値とは異なる所定の交流バイアス信号電圧値に設定可能にするために挿入されたネットワーク抵抗網と、前記ネットワーク抵抗網の一端とグランドとの間に挿入された開閉器とを備え、加速度を検出する場合には前記開閉器を開の状態にし、前記検知素子、前記ドライブ回路または前記検出回路の少なくともいずれか1つの異常を検出するための診断信号を供給する場合には前記開閉器を閉の状態にするように構成した慣性センサ。
- ネットワーク抵抗網は、ドライブ回路と第1の可動電極または第2の可動電極のいずれかとの間に挿入された第1の抵抗と、前記第1の可動電極または第2の可動電極のいずれかと前記第1の抵抗との接続点と開閉器との間に挿入された第2の抵抗から構成された請求項13に記載の慣性センサ。
- 振動素子と前記振動素子の振幅を一定に維持するための自励発振ループ信号電圧の励振周波数が50kHz以下である自励発振ループ回路を有した角速度センサと、請求項1または請求項13に記載の慣性センサを備え、前記慣性センサの交流バイアス信号電圧に前記角速度センサの自励発振ループ信号電圧を用いた複合センサ。
- 請求項1または請求項13に記載の慣性センサを2個備え、前記2個の慣性センサの交流バイアス信号電圧の位相が互いに90度異なるように前記2個の慣性センサのドライブ回路の少なくともいずれか1つには位相遷移器を有した請求項15に記載の複合センサ。
- 前記2個の慣性センサのドライブ回路の内のいずれか1つには、90度位相遷移器を有した請求項16に記載の複合センサ。
- 2個の慣性センサの検出軸の方向が互いに直交するように構成された請求項16に記載の複合センサ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003345400A JP4645013B2 (ja) | 2003-10-03 | 2003-10-03 | 加速度センサ及びそれを用いた複合センサ |
DE602004010588T DE602004010588T2 (de) | 2003-10-03 | 2004-10-01 | Inerzialsensor und eine diesen enthaltende Sensorkombination |
US10/954,587 US7337669B2 (en) | 2003-10-03 | 2004-10-01 | Inertial sensor and combined sensor therewith |
EP04023591A EP1521086B1 (en) | 2003-10-03 | 2004-10-01 | Inertial sensor and combined sensor therewith |
CNB2004100833825A CN100416276C (zh) | 2003-10-03 | 2004-10-08 | 惯性传感器以及采用该传感器的复合传感器 |
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JP2003345400A JP4645013B2 (ja) | 2003-10-03 | 2003-10-03 | 加速度センサ及びそれを用いた複合センサ |
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US9425328B2 (en) | 2012-09-12 | 2016-08-23 | Fairchild Semiconductor Corporation | Through silicon via including multi-material fill |
JP2015161640A (ja) * | 2014-02-28 | 2015-09-07 | セイコーエプソン株式会社 | 電子デバイス、電子機器、および移動体 |
JP2016095268A (ja) * | 2014-11-17 | 2016-05-26 | 株式会社デンソー | 信号処理装置 |
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EP1521086A1 (en) | 2005-04-06 |
US7337669B2 (en) | 2008-03-04 |
CN100416276C (zh) | 2008-09-03 |
DE602004010588T2 (de) | 2008-12-11 |
JP4645013B2 (ja) | 2011-03-09 |
CN1603842A (zh) | 2005-04-06 |
EP1521086B1 (en) | 2007-12-12 |
DE602004010588D1 (de) | 2008-01-24 |
US20050072233A1 (en) | 2005-04-07 |
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