Design of Hot-bulb Probe Low-Pressure Wind Speed Calibration System

摘要

In order to measure the wind speed in Mars rover thermal vacuum test correctly, a low-pressure wind speed calibration system need to be developed. The purpose of this paper is to establish a low pressure-wind speed calibration system, and give an error analysis of it. In this paper, the Hot-bulb Probe calibration scheme, calibration conditions are introduced. The errors caused by length measurement and speed measurement, disturbance of low field, measuring instrument are fully analyzed.