Radar apparatus
First Claim
1. A radar apparatus configured to derive information of a target in a vicinity of a host vehicle, the radar apparatus comprising:
- a transmitting antenna that transmits a transmission wave having a frequency that increases and decreases at a predetermined cycle;
a receiving antenna that receives a reflection wave caused by the transmission wave being reflected by the target;
a target information deriving unit that derives the information of the target by a pairing of a peak signal in an UP period obtained from the reflection wave with a peak signal in a DOWN period obtained from the reflection wave; and
a signal processor configured to;
determine whether or not the target is a standstill object having an absolute speed less than a predetermined speed,determine whether or not the target determined as the standstill object is an upper object overhead of the host vehicle and with which the host vehicle cannot collide, anddetermine, based on a frequency of determining existence of the upper object that also is the standstill object, whether an environment for deriving target information is an adverse environment in which erroneous pairing may occur, or is a non-adverse environment.
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Accused Products
Abstract
A radar apparatus is configured to derive information of a target in a vicinity of a host vehicle. The radar apparatus comprising a signal processor configured to: determine whether or not the target is a standstill object having an absolute speed less than a predetermined speed, determine whether or not the target determined as the standstill object is an upper object overhead of the host vehicle and with which the host vehicle cannot collide, and determine whether or not an environment for deriving target information is an adverse environment based on a frequency of determining existence of the upper object that also is the standstill object.
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Citations
13 Claims
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1. A radar apparatus configured to derive information of a target in a vicinity of a host vehicle, the radar apparatus comprising:
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a transmitting antenna that transmits a transmission wave having a frequency that increases and decreases at a predetermined cycle; a receiving antenna that receives a reflection wave caused by the transmission wave being reflected by the target; a target information deriving unit that derives the information of the target by a pairing of a peak signal in an UP period obtained from the reflection wave with a peak signal in a DOWN period obtained from the reflection wave; and a signal processor configured to; determine whether or not the target is a standstill object having an absolute speed less than a predetermined speed, determine whether or not the target determined as the standstill object is an upper object overhead of the host vehicle and with which the host vehicle cannot collide, and determine, based on a frequency of determining existence of the upper object that also is the standstill object, whether an environment for deriving target information is an adverse environment in which erroneous pairing may occur, or is a non-adverse environment. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle control system comprising:
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a radar apparatus configured to derive information of a target in a vicinity of a host vehicle, the radar apparatus deriving the information of the target by a pairing of a peak signal in an UP period obtained from a reflection wave received by an antenna of the radar apparatus with a peak signal in a DOWN period obtained from the reflection wave, the radar apparatus including a signal processor configured to; (a) determine whether or not the target is a standstill object having an absolute speed less than a predetermined speed, (b) determine whether or not the target determined as the standstill object is an upper object overhead of the host vehicle and with which the host vehicle cannot collide, and (c) determine, based on a frequency of determining existence of the upper object that also is the standstill object, whether an environment for deriving target information is an adverse environment in which erroneous pairing may occur, or is a non-adverse environment; and a control apparatus configured to control the host vehicle based on target information on a periphery of the vehicle derived by the radar apparatus, the control apparatus using a first control method when the environment is determined to be the non-adverse environment, and the control apparatus using a second control method having a lower degree of control than the first control method when the environment is determined to be the adverse environment. - View Dependent Claims (8)
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9. A method of deriving information of a target in a vicinity of a host vehicle with a radar apparatus having (i) a transmitting antenna that transmits a transmission wave having a frequency that increases and decreases at a predetermined cycle, (ii) a receiving antenna that receives a reflection wave caused by the transmission wave being reflected by the target, and (iii) a target information deriving unit that derives the information of the target by a pairing of a peak signal in an UP period obtained from the reflection wave with a peak signal in a DOWN period obtained from the reflection wave, the method comprising:
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determining, with a signal processor of the radar apparatus, whether or not the target is a standstill object having an absolute speed less than a predetermined speed; determining, with the signal processor, whether or not the target determined as the standstill object is an upper object overhead of the host vehicle and with which the host vehicle cannot collide, and determining, with the signal processor, based on a frequency of determining existence of the upper object that also is the standstill object, whether an environment for deriving target information is an adverse environment in which erroneous pairing may occur, or is a non-adverse environment. - View Dependent Claims (10, 11, 12, 13)
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Specification