JPH04201643A - Between-vehicle distance detecting alarm device - Google Patents
Between-vehicle distance detecting alarm deviceInfo
- Publication number
- JPH04201643A JPH04201643A JP33075890A JP33075890A JPH04201643A JP H04201643 A JPH04201643 A JP H04201643A JP 33075890 A JP33075890 A JP 33075890A JP 33075890 A JP33075890 A JP 33075890A JP H04201643 A JPH04201643 A JP H04201643A
- Authority
- JP
- Grant status
- Application
- Patent type
- Prior art keywords
- vehicle
- distance
- speed
- preceding
- vf
- 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.)
- Pending
Links
Abstract
PURPOSE: To normallize the alarm generation timing by calculating the safe between-vehicle distance, in consideration of the preceding vehicle speed, besides the own vehicle speed.
CONSTITUTION: The distance D between an own vehicle 12 and a preceding vehicle 22 is obtained by a laser rader unit 1. The own vehicle speed Vf is detected by a car speed sensor. The speed Va of the preceding vehicle 22 is obtained through the calculation from the variation of the between-vehicle distance D per fine time. The brake distance L1 of the preceding vehicle 22 is obtained by L1=Va2/2α2 from the preceding vehicle speed Va and the deceleration speed α2. The idle traveling distance L2 of the own vehicle 12 is obtained by L2=(Td+Tx)Vf from the own vehicle speed Vf, idle traveling time Td, and the judgement time Tx. The brake distance L3 of the own vehicle 12 is obtained by L3=Vf2/2α1 from the own vehicle speed Vf and the deceleration speed α1. Accordingly, the condition of alarm generation is based on the time when the sum of the preceding vehicle brake distance L1 and the between-vehicle distance D becomes smaller than the sum of the own vehicle brake distance L3 and the own vehicle idle traveling distance L2.
COPYRIGHT: (C)1992,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33075890A JPH04201643A (en) | 1990-11-30 | 1990-11-30 | Between-vehicle distance detecting alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33075890A JPH04201643A (en) | 1990-11-30 | 1990-11-30 | Between-vehicle distance detecting alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04201643A true true JPH04201643A (en) | 1992-07-22 |
Family
ID=18236221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33075890A Pending JPH04201643A (en) | 1990-11-30 | 1990-11-30 | Between-vehicle distance detecting alarm device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04201643A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172946A (en) * | 1991-12-26 | 1993-07-13 | Mitsubishi Motors Corp | Vehicle-to-vehicle distance detecting/warning device |
| US5631639A (en) * | 1994-04-20 | 1997-05-20 | Nippondenso Co., Ltd. | Collision alarm system for automotive vehicle |
| US5684473A (en) * | 1994-03-25 | 1997-11-04 | Nippondenso Co., Ltd. | Measuring apparatus for detecting distance between vehicles and related warning system |
| US5749426A (en) * | 1994-12-13 | 1998-05-12 | Lucas Industries Public Limited Company | Apparatus and method for cruise control |
| CN102708656A (en) * | 2012-06-13 | 2012-10-03 | 绍兴电力局 | Transformer substation high-rising electrified body anti-approaching laser safety scanning alarming device |
| CN102737477A (en) * | 2012-06-13 | 2012-10-17 | 绍兴县永顺电子有限公司 | Control system for approaching-proof laser security scanning alarm of high-rise electrified body of transformer substation |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172946A (en) * | 1991-12-26 | 1993-07-13 | Mitsubishi Motors Corp | Vehicle-to-vehicle distance detecting/warning device |
| US5684473A (en) * | 1994-03-25 | 1997-11-04 | Nippondenso Co., Ltd. | Measuring apparatus for detecting distance between vehicles and related warning system |
| US5631639A (en) * | 1994-04-20 | 1997-05-20 | Nippondenso Co., Ltd. | Collision alarm system for automotive vehicle |
| DE19514654B4 (en) * | 1994-04-20 | 2009-07-09 | Denso Corporation, Kariya | Collision warning system for a motor vehicle |
| US5749426A (en) * | 1994-12-13 | 1998-05-12 | Lucas Industries Public Limited Company | Apparatus and method for cruise control |
| CN102708656A (en) * | 2012-06-13 | 2012-10-03 | 绍兴电力局 | Transformer substation high-rising electrified body anti-approaching laser safety scanning alarming device |
| CN102737477A (en) * | 2012-06-13 | 2012-10-17 | 绍兴县永顺电子有限公司 | Control system for approaching-proof laser security scanning alarm of high-rise electrified body of transformer substation |
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