Title:
OPTICAL DISTANCE MEASUREMENT DEVICE AND VEHICLE OPTICAL RADAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/026773
Kind Code:
A1
Abstract:
Upon detection of pulse present intervals (t1 to t2) where a reception pulse (22) exists from a reception signal (21), inclination of a delay time control signal (23) in the intervals is decreased. When a sampling pulse generated according to the delay time control signal (23) is used, the number of samplings in the pulse present intervals is increased. Accordingly, it is possible to obtain a time axis-expanded wave in which the reception pulse (25) of the reception signal (24) has a waveform greatly enlarged and improve the resolution of the periphery of the reception pulse (25). On the other hand, inclination of the delay time control signal (23) out of the pulse present intervals is increased. Thus, it is possible to improve the distance measurement accuracy without lowering the response.
Inventors:
NISHIDAI TETSUO (JP)
Application Number:
PCT/JP2004/012568
Publication Date:
March 24, 2005
Filing Date:
August 31, 2004
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
NISHIDAI TETSUO (JP)
NISHIDAI TETSUO (JP)
International Classes:
G01S17/931; G01S7/486; (IPC1-7): G01S17/10; G01S7/486; G01S17/93
Foreign References:
| JP2001264419A | 2001-09-26 | |||
| JPH10319111A | 1998-12-04 | |||
| JPH09264960A | 1997-10-07 | |||
| JPH09281215A | 1997-10-31 | |||
| JPH09127240A | 1997-05-16 | |||
| JPH11287852A | 1999-10-19 |
Attorney, Agent or Firm:
Sera, Kazunobu (4-10 Higashi Nihonbashi 3-chom, Chuo-ku Tokyo, JP)
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