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Reversing at an angle towards a partial wall or other
large flat surface may refract ultrasonic signals, causing
an object not to be detected.
If reversing towards a 90 degree angle, such as a corner
of a wall or pillar, sensor detection pattern will refract as
shown until vehicle is close enough to receive signal
back from corners. In such situations, vehicle could
reach very close distances before detecting.
Due to natural projection angle of the sensors, a natural
"no coverage" area is common with the system at the
outer corners of the vehicle. This may occur at about 0-
10" from the bumper's outer corners.
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