I have to develop a cycling system that measure the performance of a cyclist in terms of his speed, whether hi is cycling uphill or downhill, the pressure he is exerting on the pedals, the gear ratio his is using.

现有材料： a Strain Gauge,  an Optical IC Light Detector and a Tilt Sensor

所用到的PIC（单机片）最好为 ECIO40P 40-pin PIC 18

答案越详细越好，如有可能 请用到相对应的英文单词和术语 （全部为英文答案最好）！