Inclination angle measurement apparatus
First Claim
1. An inclination angle measurement apparatus comprising:
- a sending/receiving means for sending a wave toward a reflective object and for receiving two waves reflected from said reflective object; and
an inclination angle calculating means for calculating an angle of inclination of a moving object with respect to said reflective object based on a phase difference between phases of the two reflected waves.
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Accused Products
Abstract
An inclination angle measurement apparatus includes a first ultrasonic sensor (3) for sending an ultrasonic wave toward a reflective object (2), second and third ultrasonic sensors (4 and 5) each for receiving an ultrasonic wave reflected from the reflective object (2), and a calculation control circuit (14) for calculating an angle of inclination of a moving object with respect to the reflective object (2) based on a phase difference between ultrasonic waves received by the second and third ultrasonic sensors (4 and 5). Thus the inclination angle measurement apparatus can accurately measure the angle of inclination of the moving object with respect to the reflective object (2).
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Citations
22 Claims
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1. An inclination angle measurement apparatus comprising:
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a sending/receiving means for sending a wave toward a reflective object and for receiving two waves reflected from said reflective object; and
an inclination angle calculating means for calculating an angle of inclination of a moving object with respect to said reflective object based on a phase difference between phases of the two reflected waves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An inclination angle measurement apparatus comprising:
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a plurality of inclination angle measurement means disposed at different locations of a moving object, each of said plurality of inclination angle measurement means including a sending/receiving means for sending a wave toward a reflective object and for receiving two waves reflected from said reflective object, and an inclination angle calculating means for calculating an angle of inclination of said moving object with respect to said reflective object based on a phase difference between phases of the two reflected waves; and
a means for calculating an average of angles of inclination of said moving object calculated by said plurality of inclination angle measurement means.
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Specification