The Development Of Temperature Measuring System Of Large-Scale Shaft Parts

In order to solve the difficult problem of which the workpiece surface temperature can be conveniently online measured with high precision, we developed a set of temperature measuring system of large-scale shaft parts. The hardware and software designs of the system, partial theory analysis and experimentation are introduced in the paper. Hardware designs included the selection of temperature measuring methods and sensor, the studying of orientation mode of temperature measuring element, the selection and the introduction of temperature data logger and the development of transit equipment. The software designs included the introduction of UI (user interface) and function windows. Then some problems were analyzed in the software-debugging course. Finally the system error was analyzed and its effect was calculated to the measuring result of thermal distortion.The multiplex temperature measuring system had applied to the experiment of compensating thermal error of large-scale shaft parts (water turbine, steam turbine parts) in machining process triumphantly.The system could be also used in online machining of some other parts in machine manufacturing, to realize the real time detection of non-uniform temperature field and guide the thermal compensation of workpiece.