The "Electronic Shoe" for jogging, sports and reconvalescence

In this paper a stride length measurement system is described which calculates the distance travelled of a running person. The basic principle is an ultrasonic distance measurement technique. Data from the electronic circuitry built into the shoes are transmitted wireless to a computer box which has the size of a pocket calculator. The system can be applied in the field of competitive or popular sport and also for observation of heart patients in the rehabilitation phase. During running the computer box displays online the distance travelled with an accuracy of about 5%. It can respond by accoustic signals if the runner does not follow a predetermined running speed profile.