JPS5461740A - Collision preventer - Google Patents
Collision preventerInfo
- Publication number
- JPS5461740A JPS5461740A JP12672877A JP12672877A JPS5461740A JP S5461740 A JPS5461740 A JP S5461740A JP 12672877 A JP12672877 A JP 12672877A JP 12672877 A JP12672877 A JP 12672877A JP S5461740 A JPS5461740 A JP S5461740A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- received
- antenna
- reflected waves
- lag time
- 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
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
PURPOSE: To raise an alarm, by setting a range cut distance depending on the speed of vehicle and by detecting a body having entered into the range cut distance.
CONSTITUTION: The received signal fC1 of reflected waves received from a body DA by an antenna 106 has a propagation lag time τ1=2R1/C≤Tw in comparison with the transimtted signal fR and has a frequency fR1=fT+Cd1. The received signal fC2 of reflected waves received from another body DB by the antenna 106 has a propagation lag time τ2=2R2/C>Tw and has a frequency fR2=fT+Cd2. These received signals are applied to a mixer 107 through a circulator 105 and then synchronously detected by station-transmitted signal SL supplied from a directional coupler 102, thereby obtainng video signals fd1, fd2 of period Tp. A pulsating signal ff is passed through a filter 111 so that its high frequency component fp=1/Tp is removed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52126728A JPS6026986B2 (en) | 1977-10-24 | 1977-10-24 | Collision prevention device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52126728A JPS6026986B2 (en) | 1977-10-24 | 1977-10-24 | Collision prevention device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5461740A true JPS5461740A (en) | 1979-05-18 |
JPS6026986B2 JPS6026986B2 (en) | 1985-06-26 |
Family
ID=14942394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52126728A Expired JPS6026986B2 (en) | 1977-10-24 | 1977-10-24 | Collision prevention device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6026986B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56126784A (en) * | 1980-03-11 | 1981-10-05 | New Japan Radio Co Ltd | Collision preventing device |
JPS6087600A (en) * | 1983-10-19 | 1985-05-17 | Matsushita Electric Ind Co Ltd | Voice coil for speaker |
JPS60102152U (en) * | 1983-12-19 | 1985-07-12 | 富士通テン株式会社 | Door open alarm device |
-
1977
- 1977-10-24 JP JP52126728A patent/JPS6026986B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56126784A (en) * | 1980-03-11 | 1981-10-05 | New Japan Radio Co Ltd | Collision preventing device |
JPS6087600A (en) * | 1983-10-19 | 1985-05-17 | Matsushita Electric Ind Co Ltd | Voice coil for speaker |
JPS60102152U (en) * | 1983-12-19 | 1985-07-12 | 富士通テン株式会社 | Door open alarm device |
Also Published As
Publication number | Publication date |
---|---|
JPS6026986B2 (en) | 1985-06-26 |
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