Vehicular radar apparatus
First Claim
1. A vehicular radar apparatus, mounted on a vehicle, for measuring a distance between the vehicle and a target object and a relative velocity according to transmission electromagnetic waves and reception electromagnetic waves, comprising:
- transmitting/receiving means for transmitting transmission electromagnetic waves and for receiving reception electromagnetic waves reflected by said target object; and
signal processing means for obtaining the distance and the relative velocity according to input data from said transmitting/receiving means,wherein said signal processing means comprises;
operation means for performing a mathematical operation by applying normal distributions to frequencies of detection of the distance and the relative velocity; and
target object recognition means for recognizing one or more target objects according to a result of the mathematical operation to which the normal distributions are applied,wherein said operation means is operative to establish a window corresponding to each target object, and obtain frequencies of detection of the distance and the relative velocity correspondingly to each of plural data widths of a probability density on a normal distribution curve, and establish a next window from data representing detected frequencies, andwherein said target object recognition means is operative to recognize target objects, when each of which corresponds to a distance and a relative velocity that are within a same window, as being an identical object, but recognize target objects, when each of which corresponds to a distance and a relative velocity that are not within a same window, as being different objects.
1 Assignment
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Accused Products
Abstract
Vehicular radar apparatus which enhances the accuracy of detection of a preceding vehicle and the reliability in tracking, by performing operations that use a normal distribution. For the purpose of obtaining a distance between one'"'"'s own vehicle, on which the radar apparatus is mounted, and a target object, and obtaining a relative velocity from input data based on transmission and reception electromagnetic waves, this radar apparatus provided with a signal processing unit which has operation devices for performing an operation by applying normal distributions to frequencies of detection of the distance and the relative velocity and a target object recognition device for recognizing a target object on the basis of results of an operation to which the normal distributions are applied. The operation device is operative to establish a window corresponding to each target object, and obtain the frequencies of detection of the distance and the relative velocity correspondingly to each of plural data widths or sections of a probability density on a normal distribution curve, and establish a next window from data representing detected frequencies. The target object recognition device is operative to recognize target objects, each of which corresponds to a distance and a relative velocity that are within a same window, as different objects, but recognize target objects, each of which corresponds to a distance and a relative velocity that are not within a same window, as different objects as an identical object.
22 Citations
6 Claims
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1. A vehicular radar apparatus, mounted on a vehicle, for measuring a distance between the vehicle and a target object and a relative velocity according to transmission electromagnetic waves and reception electromagnetic waves, comprising:
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transmitting/receiving means for transmitting transmission electromagnetic waves and for receiving reception electromagnetic waves reflected by said target object; and signal processing means for obtaining the distance and the relative velocity according to input data from said transmitting/receiving means, wherein said signal processing means comprises; operation means for performing a mathematical operation by applying normal distributions to frequencies of detection of the distance and the relative velocity; and target object recognition means for recognizing one or more target objects according to a result of the mathematical operation to which the normal distributions are applied, wherein said operation means is operative to establish a window corresponding to each target object, and obtain frequencies of detection of the distance and the relative velocity correspondingly to each of plural data widths of a probability density on a normal distribution curve, and establish a next window from data representing detected frequencies, and wherein said target object recognition means is operative to recognize target objects, when each of which corresponds to a distance and a relative velocity that are within a same window, as being an identical object, but recognize target objects, when each of which corresponds to a distance and a relative velocity that are not within a same window, as being different objects. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification