Multifrequency binary testing and simulation of temperature sensors with compensated stream temperature control

Real-time, real component testing of temperature sensors is necessary to provide design validation of simulated response tests. The paper describes a real-time air stream testing system and simulation environment for testing temperature sensors by multifrequency binary testing (MBT). In the real-time testing system multifrequency binary sequence (MBS) test signals are applied to the air stream heater control so providing an MBS perturbation of the air stream temperature. The stream temperature is measured by a compensated sensor. Simulated MBT of temperature sensors under nonlinear radiative heat transfer has been conducted to illustrate the problems which can arise when the amplitude of the input temperature perturbation is too high or if noise is present. An essential background of temperature sensor modelling is also given.