Bicycle power meter with frame mounted sensor

A bicycle power meter comprising:

• a rear bicycle frame having a first fork with a main body portion and an end portion adjacent a region to which a hub can be attached, said end portion having a thinner thickness dimension than said main body portion and being relatively more compressible than said main body portion;
• a strain gauge sensor assembly having first and second stretch sensors each including a first layer having a variable resistance element mounted thereon and a second layer for supporting said first layer, one of said first and second stretch sensors being fixedly attached to said relatively more compressible end portion of said first fork, the variable resistance elements of said first and second stretch sensors being ohmically interconnected to present a total resistance value representative of cyclist force at said end portion;
• a bridge circuit having said first and second stretch sensors connected in a first branch and a pair of resistances connected in a second branch;
• an amplifier coupled to said bridge circuit for amplifying signals representative of said total resistance value;
• an analog-to-digital converter coupled to said amplifier for converting the signals output from said amplifier to digital signals;
• a microcomputer coupled to said analog-to-digital converter for receiving said digital signals and bicycle velocity signals from an associated bicycle speedometer and converting the received signals to power signals;
• and
• a display coupled to said microcomputer for displaying the power signals to a cyclist.