Patent ID: 9699421
Date: 2017-07-04
CPC Classifications: B62J,G01P,H04N

Claim:
1. A motorcycle comprising: a vehicle body frame, a power unit operatively attached to the vehicle body frame and having a crankshaft, a front wheel provided forward of the power unit, a rear wheel provided rearward of the power unit, a pivot shaft provided, either on the power unit or on the vehicle body frame proximate the power unit at a position more rearward than the crankshaft, a swing arm that is pivotally supported by the pivot shaft, and that pivotally supports the rear wheel thereon at a rear portion thereof, a single video camera facing downwardly and adapted to capture a moving image of a road surface under a lower portion of the frame, the video camera arranged below the power unit or the swing arm and in back of a central portion of the crankshaft; at least two irradiation sources attached to the camera and configured to irradiate the road surface to form first and second irradiated marks in the moving image; and a control unit configured to calculate at least one of a speed of the vehicle and a bank angle of the vehicle, using information from the video camera, wherein the video camera is fastened to and supported by at least a lower portion of the power unit or a lower portion of the vehicle body frame proximate the power unit; and wherein the speed of the vehicle is calculated based on a reference distance between the two irradiation sources and a detected distance between the first and second irradiated marks.