Apparatus and method for calculating inter-vehicle distance
First Claim
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1. An apparatus configured to calculate an inter-vehicle distance, the apparatus comprising:
- an information obtainment unit configured to obtain information about an inter-vehicle distance with a preceding vehicle at a temporal interval;
an estimation unit configured to estimate an inter-vehicle distance with the preceding vehicle to be obtained by the information obtainment unit at a subsequent interval, based on the information obtained by the information obtainment unit;
a physical limit determining unit configured to determine whether an absolute value obtained by subtracting a subsequent inter-vehicle distance estimated by the estimation unit from the inter-vehicle distance obtained by the information obtainment unit at the subsequent interval is greater than or equal to a predetermined inter-vehicle distance change range (Dth) wherein the physical limit determining unit sets a physical limit and determines whether an error is present within the inter-vehicle distance;
a correction unit configured to correct the inter-vehicle distance obtained by the information obtainment unit by determining that an error is present within the inter-vehicle distance obtained by the information obtainment unit at the subsequent interval, when the absolute value is greater than or equal to the predetermined inter-vehicle distance change range; and
an information transmitter configured to transmit the inter-vehicle distance corrected by the correction unit to a vehicle control system for vehicle control.
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Abstract
Disclosed are an apparatus and a method for calculating an inter-vehicle distance that calculates a more accurate inter-vehicle distance by setting a physical limit value, by recognizing an inter-vehicle distance error occurring due to reasons such as an installation location of a sensor, a type of a vehicle, illegal remodeling of the vehicle, and the like, and thereby correcting an inter-vehicle distance.
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Citations
20 Claims
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1. An apparatus configured to calculate an inter-vehicle distance, the apparatus comprising:
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an information obtainment unit configured to obtain information about an inter-vehicle distance with a preceding vehicle at a temporal interval; an estimation unit configured to estimate an inter-vehicle distance with the preceding vehicle to be obtained by the information obtainment unit at a subsequent interval, based on the information obtained by the information obtainment unit; a physical limit determining unit configured to determine whether an absolute value obtained by subtracting a subsequent inter-vehicle distance estimated by the estimation unit from the inter-vehicle distance obtained by the information obtainment unit at the subsequent interval is greater than or equal to a predetermined inter-vehicle distance change range (Dth) wherein the physical limit determining unit sets a physical limit and determines whether an error is present within the inter-vehicle distance; a correction unit configured to correct the inter-vehicle distance obtained by the information obtainment unit by determining that an error is present within the inter-vehicle distance obtained by the information obtainment unit at the subsequent interval, when the absolute value is greater than or equal to the predetermined inter-vehicle distance change range; and an information transmitter configured to transmit the inter-vehicle distance corrected by the correction unit to a vehicle control system for vehicle control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of calculating an inter-vehicle distance implemented by a processor, the method comprising:
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an information obtaining operation of obtaining information about an inter-vehicle distance with a preceding vehicle at a temporal interval by an information obtainment hardware unit; an estimating operation of estimating an inter-vehicle distance with the preceding vehicle to be obtained at a subsequent interval in the information obtaining operation, based on the information obtained in the information obtaining operation by an estimation hardware unit; a physical limit determining operation of determining whether a value obtained by subtracting a subsequent inter-vehicle distance estimated in the estimating operation from the inter-vehicle distance obtained at the subsequent interval in the information obtaining operation is greater than or equal to a predetermined inter-vehicle distance change range (Dth) by a physical limit determining hardware unit wherein the physical limit determining hardware unit sets a physical limit and determines whether an error is present with in the inter-vehicle distance; a correcting operation of correcting the inter-vehicle distance in the information obtaining operation by determining that an error is present within the inter-vehicle distance obtained at the subsequent interval in the information obtaining operation, when the value is greater than or equal to the predetermined inter-vehicle distance change range by a correction hardware unit; and a transmitting operation of transmitting the inter-vehicle distance corrected by the correcting operation to vehicle control system for vehicle control. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification