CA2171216A1 - Laser sensor capable of measuring distance, velocity, and acceleration - Google Patents
Laser sensor capable of measuring distance, velocity, and accelerationInfo
- Publication number
- CA2171216A1 CA2171216A1 CA002171216A CA2171216A CA2171216A1 CA 2171216 A1 CA2171216 A1 CA 2171216A1 CA 002171216 A CA002171216 A CA 002171216A CA 2171216 A CA2171216 A CA 2171216A CA 2171216 A1 CA2171216 A1 CA 2171216A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- velocity
- phase difference
- acceleration
- laser sensor
- 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
Abstract
A light based distance, velocity and acceleration sensor which uses phase difference to determine the desired measurement. A laser signal is modulated by an oscillator signal and reflected off an object to a signal receiver. The reflected laser signal and the oscillator signal then pass through a dual path conditioning circuit, where the path lengths and circuit elements of the two paths are identical to cancel the effets of propagation delays in an output signal. The conditioned signals are passed through a phase comparator, to produce a signal indicative of the phase difference between the oscillator signal and the reflected laser signal. The phase difference is directly proportional to the distance between the sensor and the object.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/130,054 US5396510A (en) | 1993-09-30 | 1993-09-30 | Laser sensor capable of measuring distance, velocity, and acceleration |
US08/130,054 | 1993-09-30 | ||
PCT/US1994/010978 WO1995009370A2 (en) | 1993-09-30 | 1994-09-28 | Laser sensor capable of measuring distance, velocity, and acceleration |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2171216A1 true CA2171216A1 (en) | 1995-04-06 |
CA2171216C CA2171216C (en) | 2006-04-11 |
Family
ID=36178078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002171216A Expired - Fee Related CA2171216C (en) | 1993-09-30 | 1994-09-28 | Laser sensor capable of measuring distance, velocity, and acceleration |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2171216C (en) |
-
1994
- 1994-09-28 CA CA002171216A patent/CA2171216C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2171216C (en) | 2006-04-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |