Theory And Experiment Study On Temperature And Displacement Measurement

In recent years, measurement technique of optical fiber is one of the hot questions in the measurement field which this researching task belongs to Due to the limitation of measurement environment, the accuracy of measuringparameters has become a problem urgent to solve in the production nowadays. The paper researches a kind of system measuring the temperature and displacement of the optical fiber that can monitor and control simultaneously the temperature and displacement of the blades two-way signals of the turbine, and alert when the emergencies happen.The measurement system of optical fiber temperature and displacement includes the measurement of temperature and displacement. Because of the badly working environment of the turbine, this paper adopts the non-tangent measurement method. By it, the temperature and axial displacement on axes around the blades of the turbine can be measured. The advanced circuits monitor their change. If the temperature and displacement go beyond the normal range, the alert will be sent out, and they can be stopped and repaired' at that time.In the temperature measurement, using a means of the optical fiber homochromous radiation temperature measurement, the mathematical model is created, and the temperature is monitored in real time. In the displacement measurement, the reflex mode method of displacement measurement of optical fiber is adopted. In order to eliminate the unstability of measurement system created by the illuminant receiving outside disturbance, the system designs referenced channel to assure the reliability of measurement and monitor the change of displacement in rea time.The two-way signals as mentioned are analyzed, disposed and outputted by the AT89C55. The function, which the AT89C55 system can complete identifying and ratio disposal, as well as the computing and showing of the parameter, can ensure the performance of the measuring system, such as the measurement resolving power, precision and stability and so on.The experiments on optical fiber temperature and displacement measurement system include the measuring experiments of temperature and displacement. The paper presents the results of the experiments and the pointed model and results, and analyzes them in theory.