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EP0627634A2
Expired / Lapsed
EP
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Vehicle obstruction detection system
Assignee: Delco Electronics LLC
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Filing: 1994-05-09
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Granted: —
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Expires: 2014-05-09
Abstract
Abstract The radar system comprises in combination: a device for transmitting a pair of FM-CW radar signals, a device for transmitting a CW radar signal, a device for receiving the transmitted FM-CW and CW radar signals reflected from the target. The radar system also incorporates a device for determining a first apparent relative velocity of the target from the received FM-CW radar signals, a device for determining a second apparent relative velocity of the target from the received CW radar signal, and a device for comparing the first and second apparent relative velocities in magnitude to thereby determine from the difference therebetween whether the target is a hazard.
Inventors
- 👤 Zhaohong Zhang
- 👤 Fie An Liem
- 👤 Michael John Shorkey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 13:33
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/583; G01S13/584; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/88; G01S13/93; G01S13/931; G01S13/345; G01S2013/9315; G01S2013/932; G01S2013/9322; G01S2013/9327; G01S2013/93272; G01S2013/93274
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A vehicle obstruction detection system for discriminating between hazardous and non-hazardous obstructions comprising transmitting means (41,43,45, 47) for transmitting a pair of first signals, said first signals being frequency modulated continuous wave signals, and a second signal, said second signal being a continuous wave signal; receiving means (42) for receiving reflections of the first and second signals reflected off an obstruction; processing means (49) for obtaining a first relative velocity of the obstruction on the basis of the received pair of first signals, and for obtaining a second relative velocity of the obstruction on the basis of the second signal; and comparator means (49) for comparing the first and second relative velocities and for determining that a hazardous obstruction exists when the difference between the first and second velocities exceeds a predetermined magnitude.
Claim 2
Dependent Claim
109 words
A vehicle obstruction detection system for discriminating between hazardous and non-hazardous obstructions comprising transmitting means (41,43,45, 47) for transmitting a pair of first signals, said first signals being frequency modulated continuous wave signals, and a second signal, said second signal being a continuous wave signal; receiving means (42) for receiving reflections of the first and second signals reflected off an obstruction; processing means (49) for obtaining a first doppler quantity from the received pair of first signals and a second doppler quantity from the received second signal; and identifying means (49) operative to determine that no hazardous obstruction is present when the first and second doppler quantities are contradictory.
Claim 3
Dependent Claim
20 words
A vehicle obstruction detection system according to claim 1 or 2, wherein the pair of first signals are linearly modulated.
Claim 4
Dependent Claim
25 words
A vehicle obstruction detection system according to claim 1, 2 or 3, wherein the pair of first signals and the second signal are radar signals.
Claim 5
Independent Claim
118 words
A method of discriminating between hazardous and non-hazardous obstructions in the vicinity of a vehicle comprising the steps of transmitting a pair of first signals, said first signals being frequency modulated continuous wave signals, and a second signal, said second signal being a continuous wave signal; receiving reflections of the first and second signals reflected off an obstruction; obtaining a first relative velocity of the obstruction on the basis of the received pair of first signals, obtaining a second relative velocity of the obstruction on the basis of the second signal; comparing the first and second relative velocities; and determining that a hazardous obstruction exists when the difference between the first and second velocities exceeds a predetermined magnitude.
Claim 6
Independent Claim
97 words
A method of discriminating between hazardous and non-hazardous obstructions in the vicinity of a vehicle comprising the steps of transmitting a pair of first signals, said first signals being frequency modulated continuous wave signals, and a second signal, said second signal being a continuous wave signal; receiving reflections of the first and second signals reflected off an obstruction; obtaining a first doppler quantity from the received pair of first signals and a second doppler quantity from the received second signal; and determining that no hazardous obstruction is present when the first and second doppler quantities are contradictory.
Claim 7
Dependent Claim
19 words
A method according to claim 5 or 6, comprising the step of linearly modulating the pair of first signals.
References Cited (Backward Citations)
No citation records indexed.
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