In order to realize detection of motion displacement of objects

a displacement detection system is designed

which uses domestic capacitive MEMS acceleration sensor MSCA3002 as a core

24-bit high precision A /D converter ADSl255 and ARM processor LM3S2B93 as main controller.The hardware circuit and software algorithm design of the system are introduced in detail.The acceleration detected by sensor is transformed to motion displacement of object through integral algorithm.The experimental results show that the system has high sampling precision

high sampling rate and small error

detection precision of A /D converter to acceleration signal can reach 0.4 %

and displacement measurement precision can be controlled around 3 % after integral

which realizes detection of motion displacement very well.