Fiber grating sensor has potentially a low cost, strongly multiplexing capabilities and easily form all kinds of Fiber Sensing net, so it is specially suited for multipoint measurement.

This method has many advantages such as speedy, safety, abundant information, synchronous multipoint measurement, safe storage and so on, compared with the traditional deformation measurement methods.

Multipoint area measurement which based on Hartmann diaphragm is proposed for poor anti-jamming capability and poor measure accuracy of single-point measurement method at present.