At present

vehicle security alarm devices commonly have limitation of false alarming rate and can not make effective communication between car and owner

a car security alarm system based on PSoC is designed.In this system

PSoC is used as main control chip

which achieves the goal of the single chip system

decreases the PCB area and reduces cost;in addition

this system uses GSM network to let owners know the car safety conditions in time

and at the same time

it uses SC—1 vibration sensor to improve the sensitivity of car security alarm system.These advantages solve problems of the false alarming rate and car-owner communication.Through actual simulation and test

it proves that this system performances steadily and has significant value.