WO2000016042A1 - Angular speed sensor - Google Patents
Angular speed sensor Download PDFInfo
- Publication number
- WO2000016042A1 WO2000016042A1 PCT/JP1999/004897 JP9904897W WO0016042A1 WO 2000016042 A1 WO2000016042 A1 WO 2000016042A1 JP 9904897 W JP9904897 W JP 9904897W WO 0016042 A1 WO0016042 A1 WO 0016042A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- detection
- amplifier
- signal
- circuit
- 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.)
- Ceased
Links
Classifications
-
- 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
Definitions
- the present invention relates to an angular velocity sensor.
- the angular velocity sensor includes an excitation unit that applies vibration to the tuning fork vibrator, a unit that detects a vibration level of the vibrator, a detector that detects coriolis that occurs according to the angular velocity, and a unit that detects the vibration level
- a first amplifier that amplifies the output signal of the first amplifier; a rectifier circuit that rectifies the output signal of the first amplifier to obtain a DC voltage; a comparing unit that compares an output voltage of the rectifier circuit with a reference voltage;
- the excitation unit is configured to amplify the voltage obtained by shifting the phase of the output voltage from the first amplifier by 90 degrees by the output voltage from the comparison unit and control the amplitude of the tuning fork vibrator to be constant. It consists of a connected variable gain amplifier.
- an object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an angular velocity sensor having a function of detecting a change in sensitivity due to a failure or deterioration and having significantly improved reliability.
- the present invention provides an exciting section for applying vibration to a vibrating body, a means for detecting a vibration level of the vibrating body, and a first detecting means for detecting a corioliser generated according to an angular velocity.
- a second detection means for detecting a signal having a polarity opposite to that of the first detection means; and a drive for receiving a signal from the vibration level detecting means as an input and outputting a signal to the excitation unit as an output.
- FIG. 1 is a block diagram of the angular velocity sensor according to the first embodiment of the present invention.
- FIG. 2 is a top view for explaining the electrode arrangement of the angular velocity sensor element block according to the first embodiment.
- FIG. 4 is a block diagram of the angular velocity sensor in the second embodiment of the present invention
- FIG. 5 is a block diagram of the angular velocity sensor in the third embodiment of the present invention
- FIG. 6 is a block diagram of an angular velocity sensor according to Embodiment 4 of the present invention.
- BEST MODE FOR CARRYING OUT THE INVENTION Example 1
- FIG. 1 is a block diagram of an angular velocity sensor according to Embodiment 1 of the present invention.
- FIG. 2 is a top view for explaining in detail the electrode arrangement of the angular velocity sensor element block in Embodiment 1 of the present invention.
- 1 is a tuning fork vibrator of an angular velocity sensor composed of quartz
- 2a and 2b are electrodes formed on the tuning fork vibrator 1 to constitute an excitation unit
- 3 Are electrodes formed on the sound or vibrating body 1 to constitute the means for detecting the vibration level of the tuning fork vibrating body 1
- 4 and 5 constitute detecting means for detecting the corioliser generated according to the angular velocity.
- the element block 1a is configured.
- 11 is a first amplifier
- 12 is a rectifier
- 13 is a smoothing circuit
- 14 is a variable gain amplifier
- 15a and 15b are second amplifiers
- 16a and 16 b is the fourth amplifier
- the fifth amplifier 17a and 17b are the first phase shift circuit
- the second phase shift circuit 18a and 18b are the first phase detector
- a second phase detector, 19 is a comparator for detecting the vibration of the tuning fork vibrator 1
- 20 a and 2 Ob are a first mouth and a pass filter, and a second mouth.
- One-pass filter 2 1a and 2 1b are 1st Adjustment means
- second adjustment means 21 c and 21 f are the first DC amplifier and the second DC amplifier
- 21 d and 21 g are the first amplification degree adjustment resistors
- the second The amplification degree adjustment resistors 21 e and 2 lh are a first offset adjustment section and a second offset adjustment section.
- the drive circuit 6 is composed of a first amplifier 11 receiving the electric charge generated at the electrode 3 formed on the tuning fork vibrator 1 to constitute a means for detecting the vibration level, and a first amplifier 11
- a rectifier 12 for rectifying an output voltage
- a smoothing circuit 13 for smoothing an output voltage of the rectifier 12, and an output voltage of the first amplifier 11 which is input to an output voltage of the smoothing circuit 13.
- a variable gain amplifier 14 whose amplification degree changes in accordance with the output voltage, a second amplifier 15 a for amplifying the output voltage of the variable gain amplifier 14, and an output having a phase opposite to that of the second amplifier 15 a.
- a third amplifier 15b emitted.
- the first amplifier 11 is called an I-to-V converter or a current amplifier that converts input charges into a voltage, and is composed of an operational amplifier and a feedback resistor. According to this configuration, the input terminal operates so as to be always at 0 V, and the expression “the input is imaginary” is expressed. This effect can be eliminated if the input voltage is always zero even if the capacitance component of the electrode 3, the wiring capacitance up to the drive circuit 6, and the inductance are interposed. It is an effective circuit means for handling weak signals as in the case of this drive circuit 6 and performing signal detection that requires no phase shift to perform synchronous detection.
- the rectifier 12 and the smoothing circuit 13 are circuits for converting the magnitude of the electric charge generated at the electrode 3 into a DC voltage, and the voltage obtained thereby represents the vibration level of the sound or vibrator 1.
- Variable gain amplifier 14 is the first amplifier When the output of 11 and the output of smoothing circuit 13 are input, and the output voltage of smoothing circuit 13 is small (when the vibration of tuning fork vibrator 1 is small), the output signal of first amplifier 11 is When the output of the smoothing circuit 13 is large (when the vibration level of the tuning fork vibrator 1 is large), the amplification degree is decreased.
- the vibration of the tuning fork vibrator 1 can be kept constant by the variable gain amplifier 14.
- the first and second detection circuits 7 and 8 receive a charge generated on the first detection electrode 4 and the second detection electrode 5 as inputs and output a fourth amplifier 1 which outputs a voltage proportional to the charge amount. 6a, a fifth amplifier 16b, and a first phase shift circuit 1 for phase shifting the output voltages of the fourth amplifier 16a and the fifth amplifier 16b by 90 degrees. 7a, 2nd phase shift circuit 17b, Comparator for detecting vibration timing of tuning fork vibrator 1 — 1st phase detector for phase detection by output timing signal of 19th , The second phase detectors 18a and 18b, and the output signals of these phase detectors 18a and 18b by the first mouth-to-pass filter and the second mouth-to-pass filter.
- first adjusting means for amplifying the output voltage after passing through 20a and 20b in direct current
- second adjusting means 21a and 21b The first adjusting means and the second adjusting means are independently provided with a first DC amplifier and a second DC amplifier for adjusting the amplification, the offset and the temperature dependence of the offset, respectively.
- the tuning fork vibrator 1 is constantly vibrated by the drive signals sent to the electrodes 2a and 2b by the second amplifier 15a and the third amplifier 15b of the drive circuit 6, respectively.
- a rotational angular velocity is applied to the vibrating body 1
- the charge generated by the coli liquor is detected by the first detection electrode 4 and the second detection electrode 5. Since the first detection electrode 4 and the second detection electrode 5 are arranged so that charges of opposite polarities can be obtained, the first and second outputs of the first and second detection circuits 7 and 8 can be obtained. Outputs as shown in FIGS. 3 (a) and 3 (b) are obtained from terminals 9 and 10, respectively.
- FIG. 4 is a block diagram of the angular velocity sensor according to the second embodiment of the present invention. It is. 4, the same components as those in FIG. 1 are denoted by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described in detail.
- reference numeral 50 denotes differential operation means
- 51 denotes comparison means.
- the calculation of the difference between the output H ⁇ voltage from the first output terminal 9 provided in the first detection circuit 7 and the output voltage from the second output terminal 10 provided in the second detection circuit 8 is performed.
- differential operation means 50 for performing the operation From the differential operation means 50, 40 mVZdeg / sec is obtained as the substantial sensitivity. Therefore, twice the output sensitivity can be obtained compared to the output sensitivity from only one side. If the sensitivity is adjusted to the conventional level (output level only from one side), the dynamic range of the input range for angular velocity detection can be doubled.
- the calculation of the sum of the output voltage from the first output terminal 9 provided in the first detection circuit 7 and the output voltage from the second output terminal 10 provided in the second detection circuit 8 is performed. It is composed of comparison means 51 for performing.
- FIG. 5 is a block diagram of an angular velocity sensor according to Embodiment 3 of the present invention.
- reference numeral 22 denotes a first level judgment circuit, which is composed of comparators 23 and 24 and an OR gate 25.
- the output voltage of the smoothing circuit 13 is input to the comparators 2 3 and 2 4, and when this voltage becomes lower than the specified voltage range or becomes larger than the specified voltage range
- the signal is output from OR gate 25.
- the first level determination circuit 22 outputs an alarm even when the vibration level of the tuning fork vibrator 1 has not reached the specified level immediately after power-on.
- the second and third level judgment circuits 29a and 29b are based on the detection circuits 26a and 26b, the smoothing circuits 27a and 27b, and the comparators 28a and 28b, respectively.
- the detection signals from the first detection electrode 4 and the second detection electrode 5 are detected by the detection circuits 26a and 26b, and are converted to DC voltage by the smoothing circuits 27a and 27b.
- the level is determined by the comparator 28a ; 28b, and when an abnormal signal is generated on the first detection electrode 4 and the second detection electrode 5 due to mechanical shock, etc., the comparator An abnormal signal can be output from 28a or 28b. If an error signal is output from either the comparator 28a or the comparator 28b, the signal is output from the R gate 30. Sa In addition, if there is an output from either R gate 25 or OR gate 30, it is output from OR gate 31.
- FIG. 6 is a block diagram of an angular velocity sensor according to Embodiment 4 of the present invention. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described in detail.
- the fourth amplifier 16a in the first detection circuit 7 is constituted by operational amplifiers 36, 37, and 38, and the first detection electrode 4 is connected to the first detection electrode 4 via wiring.
- the wiring patterns 39, 40 formed near the wiring connected to the input terminal 34 of the detection circuit 7 and the wiring connected to the input terminal 34, and formed on the substrate 41. Is grounded, and the wiring pattern 39 is connected to the input terminal 35 of the first detection circuit 7.
- Input terminals 34 and 35 are connected to the negative inputs of operational amplifiers 36 : 37, respectively, and charge-to-voltage conversion is performed. With this configuration, a similar disturbance is input to the input terminals 34 and 35.
- Examples of the disturbance include a sneak path caused by the induction of the voltage applied to the electrodes 2a and 2b, a sneak path due to the capacitance of the wiring pattern, or an external radiated electromagnetic field. Since these effects are input to the input terminals 34 and 35 at the same time, they can be eliminated by the operational amplifier 38 as a common-mode signal. Also, since the configuration of the fifth amplifier 16b in the second detection circuit 8 and the connection to the second detection electrode 5 are all the same, the details are omitted. Industrial applicability
- the detection circuit As described above, according to the present invention, from the detection electrode formed on the vibrating body to the detection circuit becomes a double system, and it is also possible to constantly monitor and compare the respective output signals. If an error occurs, an abnormality can be determined immediately.
- the sensitivity can be doubled by calculating the difference between these output voltages, so that the force sensitivity must be set to the same level as the conventional level.
- the dynamic range of the input range for angular velocity detection can be doubled.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99943233A EP1031814B1 (en) | 1998-09-10 | 1999-09-09 | Angular speed sensor |
| US09/554,014 US6584841B1 (en) | 1998-09-10 | 1999-09-09 | Angular rate sensor |
| CA002309628A CA2309628C (en) | 1998-09-10 | 1999-09-09 | Angular rate sensor |
| DE69932225T DE69932225T2 (de) | 1998-09-10 | 1999-09-09 | Winkelgeschwindigkeitssensor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10/256536 | 1998-09-10 | ||
| JP10256536A JP2000088578A (ja) | 1998-09-10 | 1998-09-10 | 角速度センサ |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000016042A1 true WO2000016042A1 (en) | 2000-03-23 |
Family
ID=17293998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1999/004897 Ceased WO2000016042A1 (en) | 1998-09-10 | 1999-09-09 | Angular speed sensor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6584841B1 (ja) |
| EP (1) | EP1031814B1 (ja) |
| JP (1) | JP2000088578A (ja) |
| CA (1) | CA2309628C (ja) |
| DE (1) | DE69932225T2 (ja) |
| WO (1) | WO2000016042A1 (ja) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6705151B2 (en) | 1995-05-30 | 2004-03-16 | Matsushita Electric Industrial Co., Ltd. | Angular velocity sensor |
| US6912901B1 (en) | 1995-05-30 | 2005-07-05 | Matsushita Electric Industrial Co., Ltd. | Angular velocity sensor |
| US6732586B2 (en) | 1995-05-30 | 2004-05-11 | Matsushita Electric Industrial Co., Ltd. | Angular velocity sensor |
| JP4449110B2 (ja) * | 1999-08-18 | 2010-04-14 | パナソニック株式会社 | 角速度センサ |
| JP4843855B2 (ja) * | 2001-03-09 | 2011-12-21 | パナソニック株式会社 | 角速度センサ |
| JP4924858B2 (ja) * | 2001-07-06 | 2012-04-25 | セイコーエプソン株式会社 | 角速度測定装置 |
| JP3937334B2 (ja) * | 2003-03-27 | 2007-06-27 | 株式会社デンソー | 振動型角速度センサの異常検出装置、異常検出方法、異常検出用プログラム並びに車両制御システム |
| JP4310571B2 (ja) * | 2003-04-07 | 2009-08-12 | 株式会社村田製作所 | 静電容量検出型振動ジャイロ、および静電容量変化検出方法 |
| JP4529444B2 (ja) * | 2004-01-13 | 2010-08-25 | パナソニック株式会社 | 角速度センサ |
| JP3964875B2 (ja) * | 2004-02-16 | 2007-08-22 | 株式会社ジャイトロニクス | 角速度センサ |
| US7134336B2 (en) * | 2004-03-19 | 2006-11-14 | Denso Corporation | Vibration type angular velocity sensor |
| JP2006162276A (ja) * | 2004-12-02 | 2006-06-22 | Denso Corp | 物理量センサ |
| JP2007093233A (ja) * | 2005-09-27 | 2007-04-12 | Seiko Epson Corp | 角速度信号処理回路 |
| JP5261915B2 (ja) * | 2006-10-18 | 2013-08-14 | セイコーエプソン株式会社 | 検出装置、ジャイロセンサ、電子機器及び検出装置の調整方法 |
| JP5003101B2 (ja) * | 2006-10-27 | 2012-08-15 | トヨタ自動車株式会社 | ヨーレートセンサの励振回路の異常監視方法、及び、異常監視回路 |
| JP2009002735A (ja) * | 2007-06-20 | 2009-01-08 | Epson Toyocom Corp | 角速度検出装置 |
| JP5083287B2 (ja) | 2009-09-11 | 2012-11-28 | セイコーエプソン株式会社 | 検出装置、物理量測定装置及び電子機器 |
| JP4821900B2 (ja) | 2009-09-11 | 2011-11-24 | セイコーエプソン株式会社 | 検出装置、物理量測定装置及び電子機器 |
| JP5209742B2 (ja) * | 2009-10-13 | 2013-06-12 | 日本特殊陶業株式会社 | センサ制御装置およびセンサ制御方法 |
| EP2605022B1 (en) * | 2010-08-11 | 2015-02-25 | Hitachi Automotive Systems, Ltd. | Inertial sensor |
| US9279826B2 (en) | 2010-12-06 | 2016-03-08 | Panasonic Intellectual Property Management Co., Ltd. | Inertial force sensor with a correction unit |
| US8939007B2 (en) | 2011-04-27 | 2015-01-27 | Panasonic Corporation | Inertial force sensor and zero point correction method used therein |
| JP4924912B2 (ja) * | 2011-08-24 | 2012-04-25 | セイコーエプソン株式会社 | 角速度測定方法および角速度測定装置の診断回路 |
| US9193055B2 (en) | 2012-04-13 | 2015-11-24 | Black & Decker Inc. | Electronic clutch for power tool |
| JP2012189610A (ja) * | 2012-06-04 | 2012-10-04 | Seiko Epson Corp | 検出装置、ジャイロセンサ、電子機器及び検出装置の調整方法 |
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| JPS63181912U (ja) * | 1987-05-15 | 1988-11-24 | ||
| JPH04215017A (ja) * | 1990-12-11 | 1992-08-05 | Murata Mfg Co Ltd | 検知回路 |
| JPH05264279A (ja) * | 1992-03-19 | 1993-10-12 | Akai Electric Co Ltd | 診断機能付振動ジャイロ |
| JPH0618267A (ja) * | 1991-10-09 | 1994-01-25 | Akai Electric Co Ltd | 診断機能付振動ジャイロ |
| JPH06148231A (ja) * | 1992-11-11 | 1994-05-27 | Aisin Seiki Co Ltd | ヨーレートセンサの温度補償方法及び温度補償装置 |
| JPH06207946A (ja) * | 1993-01-12 | 1994-07-26 | Matsushita Electric Ind Co Ltd | 角速度センサ装置 |
| JPH06241812A (ja) * | 1993-02-17 | 1994-09-02 | Mitsubishi Electric Corp | 振動ジャイロ用振動子および振動ジャイロ用検出回路 |
| JPH09145377A (ja) * | 1995-11-20 | 1997-06-06 | Alps Electric Co Ltd | 圧電振動子を用いた検出装置 |
| JPH09257489A (ja) * | 1996-03-21 | 1997-10-03 | Yoshiro Tomikawa | 圧電素子を用いた装置 |
| JPH1038580A (ja) * | 1996-07-25 | 1998-02-13 | Toyota Motor Corp | 角速度検出装置 |
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| US4381672A (en) * | 1981-03-04 | 1983-05-03 | The Bendix Corporation | Vibrating beam rotation sensor |
| CA1234705A (en) | 1984-03-22 | 1988-04-05 | Suzushi Kimura | Angular velocity sensor |
| US4791815A (en) * | 1986-04-11 | 1988-12-20 | Matsushita Electric Industrial Co., Ltd. | Cyclically driven gyro and adjusting system therefor |
| JPS63181912A (ja) | 1987-01-23 | 1988-07-27 | 株式会社クボタ | 田植機の油圧式操向装置 |
| GB2262342A (en) * | 1988-08-12 | 1993-06-16 | Murata Manufacturing Co | A vibrator for use in a vibratory gyroscope |
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| US5719460A (en) * | 1994-11-28 | 1998-02-17 | Nippondenso Co., Ltd | Angular velocity sensor |
| DE69622815T2 (de) * | 1995-05-30 | 2002-11-28 | Matsushita Electric Industrial Co., Ltd. | Drehgeschwindigkeitssensor |
| JP3386320B2 (ja) * | 1996-10-01 | 2003-03-17 | 株式会社村田製作所 | 振動ジャイロの温度特性調整方法 |
| KR100254114B1 (ko) * | 1997-08-13 | 2000-04-15 | 노용래 | 2축 동시 측정용 압전 회전 센서 및 그 측정 회로 |
| JP3191742B2 (ja) * | 1997-09-25 | 2001-07-23 | 株式会社村田製作所 | 振動ジャイロ |
| JP3932661B2 (ja) * | 1998-03-31 | 2007-06-20 | 松下電器産業株式会社 | 角速度センサ駆動回路 |
-
1998
- 1998-09-10 JP JP10256536A patent/JP2000088578A/ja active Pending
-
1999
- 1999-09-09 CA CA002309628A patent/CA2309628C/en not_active Expired - Fee Related
- 1999-09-09 US US09/554,014 patent/US6584841B1/en not_active Expired - Fee Related
- 1999-09-09 EP EP99943233A patent/EP1031814B1/en not_active Expired - Lifetime
- 1999-09-09 DE DE69932225T patent/DE69932225T2/de not_active Expired - Lifetime
- 1999-09-09 WO PCT/JP1999/004897 patent/WO2000016042A1/ja not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63181912U (ja) * | 1987-05-15 | 1988-11-24 | ||
| JPH04215017A (ja) * | 1990-12-11 | 1992-08-05 | Murata Mfg Co Ltd | 検知回路 |
| JPH0618267A (ja) * | 1991-10-09 | 1994-01-25 | Akai Electric Co Ltd | 診断機能付振動ジャイロ |
| JPH05264279A (ja) * | 1992-03-19 | 1993-10-12 | Akai Electric Co Ltd | 診断機能付振動ジャイロ |
| JPH06148231A (ja) * | 1992-11-11 | 1994-05-27 | Aisin Seiki Co Ltd | ヨーレートセンサの温度補償方法及び温度補償装置 |
| JPH06207946A (ja) * | 1993-01-12 | 1994-07-26 | Matsushita Electric Ind Co Ltd | 角速度センサ装置 |
| JPH06241812A (ja) * | 1993-02-17 | 1994-09-02 | Mitsubishi Electric Corp | 振動ジャイロ用振動子および振動ジャイロ用検出回路 |
| JPH09145377A (ja) * | 1995-11-20 | 1997-06-06 | Alps Electric Co Ltd | 圧電振動子を用いた検出装置 |
| JPH09257489A (ja) * | 1996-03-21 | 1997-10-03 | Yoshiro Tomikawa | 圧電素子を用いた装置 |
| JPH1038580A (ja) * | 1996-07-25 | 1998-02-13 | Toyota Motor Corp | 角速度検出装置 |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE69932225T2 (de) | 2006-11-02 |
| CA2309628C (en) | 2008-03-11 |
| DE69932225D1 (de) | 2006-08-17 |
| EP1031814A4 (en) | 2001-12-05 |
| US6584841B1 (en) | 2003-07-01 |
| CA2309628A1 (en) | 2000-03-23 |
| JP2000088578A (ja) | 2000-03-31 |
| EP1031814B1 (en) | 2006-07-05 |
| EP1031814A1 (en) | 2000-08-30 |
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