CA2467233A1 - Ultrasonic sensor - Google Patents
Ultrasonic sensor Download PDFInfo
- Publication number
- CA2467233A1 CA2467233A1 CA 2467233 CA2467233A CA2467233A1 CA 2467233 A1 CA2467233 A1 CA 2467233A1 CA 2467233 CA2467233 CA 2467233 CA 2467233 A CA2467233 A CA 2467233A CA 2467233 A1 CA2467233 A1 CA 2467233A1
- Authority
- CA
- Canada
- Prior art keywords
- piezoelectric vibrator
- reverberation
- ultrasonic sensor
- output signal
- period
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H7/00—Measuring reverberation time ; room acoustic measurements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
An ultrasonic sensor includes a piezoelectric vibrator (1), a reverberation measuring device (5) and a compensating device (2a-2c, 5, 6, 8a-8c, 9a-9c, 10a, 10b). The piezoelectric vibrator (1) vibrates to transmit an ultrasonic wave, receives a reflected wave of the transmitted ultrasonic wave and produces an output signal corresponding to vibration of the piezoelectric vibrator (1). The reverberation measuring device (5) measures a reverberation period of the piezoelectric vibrator (1) from the output signal. The compensating device (2a-2c, 5, 6, 8a-8c, 9a-9c, 10a, 10b) compensates for an operation characteristic of the piezoelectric vibrator (1) in accordance with the measured reverberation period. Thus, the ultrasonic sensor can decrease a reverberation period, which may cause reduction in detection accuracy and impossibility of detection of an obstacle at a short distance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA 2467233 CA2467233C (en) | 2003-05-16 | 2004-05-13 | Ultrasonic sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-138406 | 2003-05-16 | ||
CA 2467233 CA2467233C (en) | 2003-05-16 | 2004-05-13 | Ultrasonic sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2467233A1 true CA2467233A1 (en) | 2005-11-13 |
CA2467233C CA2467233C (en) | 2008-07-15 |
Family
ID=35452151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2467233 Expired - Fee Related CA2467233C (en) | 2003-05-16 | 2004-05-13 | Ultrasonic sensor |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2467233C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2491043A (en) * | 2011-05-19 | 2012-11-21 | Bosch Gmbh Robert | Ultrasound measurement system and method of detecting an obstacle by means of ultrasound |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101887901B1 (en) * | 2016-09-08 | 2018-08-13 | 현대오트론 주식회사 | Apparatus and method for driving ultrasonic sensor |
-
2004
- 2004-05-13 CA CA 2467233 patent/CA2467233C/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2491043A (en) * | 2011-05-19 | 2012-11-21 | Bosch Gmbh Robert | Ultrasound measurement system and method of detecting an obstacle by means of ultrasound |
GB2491043B (en) * | 2011-05-19 | 2014-12-03 | Bosch Gmbh Robert | Ultrasound measurement system and method of detecting an obstacle by means of ultrasound |
Also Published As
Publication number | Publication date |
---|---|
CA2467233C (en) | 2008-07-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3810430B2 (en) | Ultrasonic ranging device | |
US4264788A (en) | Damped ultrasonic detection unit | |
US7069793B2 (en) | Ultrasonic flow meter and ultrasonic sensor | |
WO2005066756A3 (en) | Touch sensitive device employing bending wave vibration sensing and excitation transducers | |
WO2006042092A3 (en) | Ultrasonic fluid level sensor | |
WO2005034717A3 (en) | Bladder measurement | |
DK1505252T3 (en) | Acoustic multimode imaging in lined wells | |
JP7446092B2 (en) | Distance sensing system to determine time-of-flight measurements with reduced deadband | |
WO2003061478A3 (en) | A system and method for detection of motion | |
JP2010522870A5 (en) | ||
WO2011078691A3 (en) | Measuring apparatus | |
KR950001281A (en) | Obstacle distance measuring device using ultrasonic sensor and method | |
FR2790554B1 (en) | METHOD AND DEVICE FOR MEASURING THE PROPAGATION TIME OF A SIGNAL, IN PARTICULAR OF AN ULTRASONIC SIGNAL | |
WO2004070358A3 (en) | Improvements in fluid monitoring | |
CA2467233A1 (en) | Ultrasonic sensor | |
JPH01156661A (en) | Joint part survey instrument | |
JP3047588B2 (en) | Ultrasonic transducer for liquid concentration meter | |
JP4266117B2 (en) | Ultrasonic flow meter | |
JP3654273B2 (en) | Flow rate measuring device and flow rate measuring method | |
JPH0454471Y2 (en) | ||
JP3014204U (en) | 2-wave ultrasonic sensor | |
JP2004085420A5 (en) | ||
JPH07311184A (en) | Sensor and method for measuring ultrasonic propagation time | |
RU2004109828A (en) | METHOD FOR MEASURING FLOW CONSUMPTION AND DEVICE FOR ITS IMPLEMENTATION | |
RU18578U1 (en) | DEVICE OF ULTRASONIC THICKNESS OF PRODUCTS |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20130513 |