The accuracy of micro-displacement measurement system is restricted by A/D acquisition at present.In order to further enhance the measuring accuracy

a micro-displacement measuring system based on multi-cycle synchronous measurement is designed with a single-chip microcomputer as the core of test and control circuit.Practical application shows that under low real-time demand condition

measurement accuracy of the system can reach 0.1 μm when the measuring range of inductance dis-placement sensor is ±2 mm

and higher measurement accuracy can be achieved with the counting frequency increased.