Patent ID: 7310061

Claim:
A velocity sensor configured so as to be installed on a movable body and comprising: a sensor circuit unit for generating a transmission signal having wave characteristics, receiving a reflection signal of the transmission signal reflected from an object, and generating and outputting a signal required for calculating a relative speed between said movable body and said object according to the reflection signal received and the transmission signal, and a lens for modifying the irradiation angle of the transmission signal generated by the sensor circuit unit, wherein said sensor circuit unit generates the transmission signal to form a beam shape, which is formed with a beam width in the vicinity of said object not greater than the beam width in the vicinity of an emission opening of said velocity sensor for emitting the transmission signal, wherein said sensor circuit unit includes a substrate, an integrated circuit device mounted on said substrate, a transmission antenna electrically connected to said integrated circuit device and emitting said transmission signal, and a reception antenna electrically connected to said integrated circuit device and receiving said reflection signal; wherein said transmission signal is an electromagnetic wave and said lens is a dielectric lens configured in such a manner that the focal distance of the electromagnetic wave is modifiable; wherein said dielectric lens is formed by a first dielectric lens and a second dielectric lens arranged separately from said first dielectric lens; and further comprising an adjustment mechanism for adjusting the position of at least one of said first and said second dielectric lens in said velocity sensor.