Vehicle speed detection means for power generation system

A vehicle energy harvester comprising:

• a plurality of subunits each having an upper surface forming a roadway surface;
• a vehicle activated treadle on at least one of the plurality of subunits, the vehicle activated treadle moveable between a first position in which an upper surface of the treadle is at an angle with respect to the upper surface of the roadway surface and a second position in which the upper surface of the treadle is flush with the upper surface of the roadway surface;
• a generator that generates power in response to movement of the vehicle activated treadle;
• and
• a vehicle speed detection device that detects a speed of a vehicle travelling over the roadway surface based on a speed of movement of the vehicle activated treadle.

A vehicle energy harvester comprising:

• a subunit having an upper surface forming a roadway surface;
• a vehicle activated treadle on the subunit, the vehicle activated treadle moveable between a first position in which an upper surface of the treadle is at an angle with respect to the upper surface of the roadway surface and a second position in which the upper surface of the treadle is flush with the upper surface of the roadway surface;
• a generator that generates power in response to movement of the vehicle activated treadle;
• and
• vehicle speed detection means for detecting a speed of a vehicle travelling over the roadway surface based on a speed of movement of the vehicle activated treadle.