In order to improve the measurement precision of optical fiber sensing network

optimization layout of the sensor node is researched. According to detection area model for fiber-optic strain sensor

the objective function of the optimization problem is determined

and the layout optimization model is established by using global artificial fish swarm algorithm. The layout optimization results are analyzed by experimental method. The results show that after optimization

the maximum strain error measured by the sensor is 8. 72 × 10

-6

and the minimum value is2. 54 × 10

-6

with an average error of 6. 61 × 10

-6

. The reduction is 68. 9 %

82. 9 % and 70. 8 %

respectively

before the optimiz

ation. After optimization

the measured strain is closer to the real value than that of the artificial random arrangement sensor

and has a better measurement precision.