Model deformation and attitude angle are very important parameters in wind tunnel test.The deformation data can be used for CFD correction

and the accuracy of attitude angle affects quality and characteristic of test data.In order to get the test parameters.A kind of optical measurement device based on three-line array CCDs—Optotrak system

and the measurement technology by the system is introduced.Deformation datas with different velocities are obtained

by installing Markers on several aerofoils

and the attitude angle is measured by vector calculation.The test result shows that the system realize good application effect

deformation data curve is resonable

and the measurement accuracy of attitude angle data achieves 0.004°.