Rating method and instrument for distributing type optical fiber strain sensor

The invention is a distributed strain sensor applied widely to construction, irrigation works, traffic, petrifaction, electricity, medical treatment, machinery, power, ship, navigation fields. The invention discloses a special instrument for basic performance parameter index of the distributed fiber strain sensor. The instrument is made up of equal-strength suspending beam, temperature compensating board, static loading system, power loading system, dynamic and static strain reference measuring system, three-point deflection measuring system, and data analyzing software. The instrument can supply static carrier or dynamic carrier according to the distributed fiber strain sensor, which is used to measure the linearity relative coefficient, strain coefficient, measuring error range, measuring precision measuring repeatability index; the sampling frequency and real-time of dynamic strain measurement; static flexibility measurement error. Above mentioned measured parameter index can be applied to the analysis, process and estimation to the measuring data of the distributed fiber sensor.