Aiming at the existing problems in the dynamic calibration method of temperature sensor, Quasi‐δ pulse temperature dynamic calibration method is proposed. The Quasi‐δ pulse dynamic calibration principle was described, the characteristics of Quasi‐δ pulse function were analyzed, and the relationship among pulse width of Quasi‐δ signal, frequency range that can be calibrated, and calibration precision was obtained. Quasi‐δ pulse temperature dynamic calibration system was built using the laser as the heat source which generates the excitation temperature required for dynamic calibration. In the system, optical focusing system was designed using ellipsoidal mirror which has a better conjugate imaging property. Applying the dynamic calibration system, a K‐type armored thermocouple was calibrated dynamically, and mathematical model of the calibrated thermocouple was established by generalized least squares method based on a special whitening filter. Dynamic characteristics of the thermocouple in time domain and frequency domain were analyzed.
At the Taiwan Light Source (TLS), the stability of the electron beam orbit is sensitive to the utility conditions. The beam position showed strong correlation with the temperature while the tunnel temperature variation was more than 0.4°C. In this work, the coolant temperature and the air temperature in the storage ring tunnel were tuned to test the sensitivity of the electron beam orbit. The temperature difference of the devices in the TLS might be as high as 10°C between the system shutdown and operation. These temperature variations affected the beam stability through some specific routes. Some modeling technique was also applied to identify the correlation factors among the beam position and the utility conditions.
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