Abstract: This design is a simple installment what can examines the bicycle’s speed and auto-alarm for the bicycle traffic safety. It carries on the real-time examination to bicycle's speed which used the examination and transformation technology, microcomputer control and connection technology and digital circuit technology. And the installment will compare the measurable speed with the safe speed which is input by the keyboard. If the measurable speed is faster than the restricted speed, it will actuate the buzzer to warn. So this installment which can track, survey and restrict the bicycle’s speed real-time could warn the people to keep safety when they are riding bicycle.
Keywords: Speed examination, restricted speed, auto-alarm
