Patent ID: 7481501

Claim:
A vehicle anti-lock brake system constituted so as to drive a brake driving actuator in accordance with detection results of a vehicle brake operating state and generate a target braking force, comprising: a rotating mechanism portion, said portion including a body of rotation configured to operably connect a wheel to a vehicle body side and to rotate the wheel; a sensor unit, said sensor unit configured to: detect a first acceleration and a second acceleration, the first acceleration being in a direction orthogonal to a rotating shaft in accordance with rotation, and the second acceleration being in the rotating direction, convert the detected first and second accelerations into first and second digital values, and transmit the first and second digital values; a monitor system configured to: receive the transmitted first and second digital values, obtain the detected first and second accelerations; obtain a speed of the vehicle from the obtained detected first acceleration; and obtain a rotating speed per unit time of the wheel from the obtained detected second acceleration; and a driving component configured to drive the brake driving actuator based at least partly on the obtained first and second accelerations, wherein said sensor unit is operably connected to said rotating mechanism portion.