Apparatus for calculating misalignment quantity of beam sensor
First Claim
1. A misalignment quantity calculating apparatus for calculating and correcting a misalignment quantity of an electromagnetic wave sensor relative to a vehicle upon which the electromagnetic wave sensor is mounted, the misalignment quantity calculating apparatus comprising:
- an identity determining means for determining whether a first object detected by the electromagnetic wave sensor is identical to a second object detected by an image sensor, the electromagnetic wave sensor transmitting a probing beam and receiving an echo based on the probing beam to detect the first object, the image sensor capturing an image and processing the image to detect the second object;
a misalignment quantity calculating means for calculating, as a misalignment quantity of the electromagnetic wave sensor, an angle between a first line segment and a second line segment when it is determined that the first object is identical to the second object, the first line segment connecting a predetermined reference point of the misalignment quantity calculating apparatus and a first feature point of the first object, the second line segment connecting the predetermined reference point and a second feature point of the second object, wherein the predetermined reference point comprises a front edge point of the vehicle;
a determining means for determining whether the calculated angle between the first line segment and the second line segment is equal to or more than an angular detection threshold value; and
a correcting means for correcting the probe beam of the electromagnetic wave sensor to cancel the calculated angle between the first line segment and the second line segment.
1 Assignment
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Accused Products
Abstract
The misalignment quantity calculating apparatus determines whether a first object detected by a beam sensor is identical to a second object detected by an image sensor. Upon determining that the first object is identical to the second object, the misalignment quantity calculating apparatus calculates, as a misalignment quantity of the beam sensor, an angle between a first line segment and a second line segment; the first line segment connects a predetermined reference point of the misalignment quantity calculating apparatus and a first feature point of the first object, and the second line segment connects the predetermined reference point and a second feature point of the second object.
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Citations
11 Claims
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1. A misalignment quantity calculating apparatus for calculating and correcting a misalignment quantity of an electromagnetic wave sensor relative to a vehicle upon which the electromagnetic wave sensor is mounted, the misalignment quantity calculating apparatus comprising:
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an identity determining means for determining whether a first object detected by the electromagnetic wave sensor is identical to a second object detected by an image sensor, the electromagnetic wave sensor transmitting a probing beam and receiving an echo based on the probing beam to detect the first object, the image sensor capturing an image and processing the image to detect the second object; a misalignment quantity calculating means for calculating, as a misalignment quantity of the electromagnetic wave sensor, an angle between a first line segment and a second line segment when it is determined that the first object is identical to the second object, the first line segment connecting a predetermined reference point of the misalignment quantity calculating apparatus and a first feature point of the first object, the second line segment connecting the predetermined reference point and a second feature point of the second object, wherein the predetermined reference point comprises a front edge point of the vehicle; a determining means for determining whether the calculated angle between the first line segment and the second line segment is equal to or more than an angular detection threshold value; and a correcting means for correcting the probe beam of the electromagnetic wave sensor to cancel the calculated angle between the first line segment and the second line segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for correcting a misalignment of a sensor relative to a vehicle upon which the sensor is mounted, the system comprising:
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an object detection sensor; an electromagnetic wave sensor configured to transmit a probing beam and receiving an echo based on the probing beam; and a microprocessor configured to; detect objects in the environment of the vehicle using the electromagnetic wave sensor and the object detection sensor; determine whether a first object detected by the electromagnetic wave sensor is identical to a second object detected by the object detection sensor; calculate, as a misalignment quantity of the electromagnetic wave sensor, an angle between a first line segment and a second line segment when it is determined that the first object is identical to the second object, the first line segment connecting a predetermined reference point of the misalignment quantity calculating apparatus and a first feature point of the first object, the second line segment connecting the predetermined reference point and a second feature point of the second object, wherein the predetermined reference point comprises a front edge point of the vehicle; determining whether the calculated angle between the first line segment and the second line segment is equal to or more than an angular detection threshold value; and correcting the probe beam of the electromagnetic wave sensor to cancel the calculated angle between the first line segment and the second line segment.
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Specification