Drive assist system and wireless communication device for vehicle

摘要

A drive assist system includes: wireless communication devices on first and second vehicles. The wireless communication device on the first vehicle includes: a distance calculation device for calculating a satellite positioning distance between the first and second vehicles; and a difference calculation device for calculating a distance difference between the satellite positioning distance and a distance to the second vehicle obtained by a ranging sensor in the first vehicle. The wireless communication device of the second vehicle includes: a distance calculation device for calculating a satellite positioning distance between the second vehicle and a third vehicle; and an inter-vehicle distance determination device for estimating an inter-vehicle distance between the second and third vehicles based on the distance difference and the satellite positioning distance calculated by the distance calculation device of the second vehicle, assuming the inter-vehicle distance is not detected by a ranging sensor in the second vehicle.

主权项

1. A drive assist system for vehicles comprising:
a wireless communication device mounted on a first vehicle equipped with a ranging sensor for detecting a sensed distance to an vehicle around the first vehicle and a receiver of a signal from a satellite positioning system located within the first vehicle for successively positioning a current location of the first vehicle; and a wireless communication device mounted on a second vehicle equipped with a receiver of the signal from the satellite positioning system located within the second vehicle for successively positioning a current location of the second vehicle, wherein the wireless communication device located within the first vehicle wirelessly communicates with the wireless communication device located within the second vehicle, and the wireless communication device located within the second vehicle wirelessly communicates with a wireless communication device mounted on a third vehicle equipped with a receiver of the signal from the satellite positioning system located within the third vehicle, wherein the wireless communication device located within the second vehicle successively transmits information about the current location of the second vehicle, wherein the wireless communication device located within the first vehicle includes: a distance calculation device located within the first vehicle calculating a calculated distance between the first vehicle and the second vehicle based on the current location of the second vehicle and the current location of the first vehicle obtained by the receiver located within the first vehicle when the wireless communication device located within the first vehicle receives the information about the current location of the second vehicle from the wireless communication device in the second vehicle, which is a leading vehicle or a following vehicle of the first vehicle; and a difference calculation device located within the first vehicle calculating a distance difference between the calculated distance calculated by the distance calculation device located within the first vehicle and the sensed distance to the second vehicle obtained by the ranging sensor, wherein the wireless communication device located within the first vehicle transmits information about the distance difference, calculated by the difference calculation device located within the first vehicle, to the wireless communication device located within the second vehicle, and wherein the wireless communication device located within the second vehicle includes: a distance calculation device located within the second vehicle calculating a calculated distance between the second vehicle and the third vehicle based on the current location of the third vehicle and the current location of the second vehicle obtained by the receiver located within the second vehicle when the wireless communication device located within the second vehicle receives information about the current location of the third vehicle from the wireless communication device in the third vehicle, which is a leading vehicle of the second vehicle; and an inter-vehicle distance determination device located within the second vehicle determining an inter-vehicle distance between the second vehicle and the third vehicle by correcting the calculated distance calculated by the distance calculation device located within the second vehicle using the distance difference when the wireless communication device located within the second vehicle receives the information about the distance difference from the wireless communication device located within the first vehicle, assuming that the inter-vehicle distance is not detected by a ranging sensor in the second vehicle.