Patent ID: 7701361

Claim:
A parking information sensing device for judging whether there is a car on a parking space comprising: a light emitting unit that emits a light passes the parking space; a reflecting element for reflecting the light arranged on the parking space and located on a path of the light; an light sensing unit located on a path of the light reflected by the reflecting element and receiving the reflected light reflected by the reflecting element so as to generate a first sensing signal; and a driving control circuit coupled to the light emitting unit as well as the light sensing unit and driving the light emitting unit to emit the light; the driving control circuit receiving the first sensing signal to judge there is no car on the parking space; wherein light emitted from the light emitting unit, reflected by the reflecting element and received by the light sensing unit within a circle area πr 2 whose radius is length of the wire harness of the light-gathering member is collected and the light-gathering member is a parabolic surface that concentrates and receives the light reflected by the reflecting element.