Traditional acceleration threshold detecting system is based on micro-accelerometer.The whole design is very complicated.The system response slowly and is susceptible to external electromagnetic interference.In view of the above

a new design of acceleration threshold detecting system

which can perceive and judge whether the acceleration exceeds the threshold by the electrical inertia micro-switch is presented.The output signal of the switch is processed

and the detecting result is displayed with LED.There is also a reset model in the system

so it can repeat detecting.The system has been investigated by theoretical analysis and circuit simulation.After manufactured

the system has been tested by using drop weight.The results show that the system can accurately detect the different acceleration threshold.