On the basis of full analysis on common vehicle braking methods at home and abroad

and compare three vehicle braking methods based on principle of acceleration measurement

propose the method of measuring acceleration in any direction after collecting the zero.Based on this new method

a new type portable vehicle braking performance test device is designed based on MMA8451

S3C6410 touch-screen and achieve goal of realtime detection on speed

acceleration and distance during braking process.A large number of tests verify that the device is able to meet requirements for vehicle braking performance test and can be widely used in vehicle inspection department

automobile manufacturing plant

and vehicle maintenance department

and has a very high application value in comprehensive evaluation on automotive braking systems.