US 2007/0164896 A1 · In-vehicle radar device and communication device

Abstract

In order to consider an optimum control method and an optimum mounting method needed, a UWB having a communication function and a radar function are used. For an obstacle vehicle in front, the distance between two cars is measured using the radar function, and according to this distance, a hazard warning is issued to a driver or a pre-crash operation is carried out. Moreover, by informing its own position to each other between vehicles using the communication function, the distance to a vehicle near to the own vehicle is measured regardless of clutter, and according to this distance, a hazard warning is issued to a driver or a pre-crash operation is carried out. Moreover, the operating frequency and transmission power of a radar are changed based on its own location information, thereby reducing influence to and from other wireless system.

Claims11

Dependent claims

An in-vehicle radar device provided with a transmission and receiving part for transmitting and receiving a radar wave, the in-vehicle radar device for measuring the distance between an own vehicle and an object, comprising:

a positioning part for positioning its own location information;
a transmission data generation part for generating a radar wave, the radar wave being made by adding vehicle information containing at least its own vehicle ID and the own location information to a generated radar wave pulse;
a receiving wave identification part which, when a receiving wave is not the reflection wave of a radar wave which the own in-vehicle radar device transmitted, extracts a vehicle information of the receiving wave;
and
a distance measurement part which, when the receiving wave is the reflection wave of a radar wave which the own in-vehicle radar device transmitted, calculates the distance to the object from a delay time of the receiving wave, and which, when the receiving wave is not the reflection wave of the radar wave which the own in-vehicle radar device transmitted, calculates the distance to a relevant vehicle by using the extracted vehicle information.

2 more elements

A communication device provided with a transmitter for transmitting a radar wave from a transmission antenna and a receiver for receiving a radar wave via a receiving antenna, the communication device comprising:

a positioning part for positioning its own location information;
a transmission data generation part which generates a radar wave, the radar wave being made by adding vehicle information containing at least location information by the positioning part and the own vehicle ID to a generated radar wave pulse;
a control part for specifying a transmission timing of the generated radar wave;
a receiving wave identification part which extracts vehicle information of a receiving wave having a vehicle ID different from its own vehicle ID, based on a vehicle ID of the receiving wave received in the receiver;
and
a distance measurement part which calculates the distance and direction to a vehicle, which transmitted a relevant vehicle information, from a location information contained in the extracted vehicle information and its own location information by the positioning part.

3 more elements

Dependencies are inferred from the claim text.

In-vehicle radar device and communication device

Life of this patent

In-vehicle radar device and communication device

Life of this patent

Abstract

Claims11