Pressure. Multiple Sensor Auto-calibration System Design And Realization

Wind tunnel experiments play an important role in the gas dynamics research and aircraft aerodynamic design which based on the principle of relativity. In the experiments, we fix the model or real aircraft in artificial environment on the ground and then get man-made airflow through the environment, and then simulate the air flight states to get experimental data. In wind tunnel test technology, pressure measurement has been an important content in aircraft simulation experiment. In order to ensure the accuracy and reliability of the pressure testing data, the calibration work of the pressure sensor becomes very important.At present, the calibration method we are using is a little falling behind. All manually operations including applying pressure, getting test data, entering the calibration data into the computer, reviewing the calibration results, filling the calibration certificates and so on, because of the large amount of the manually input data, input error is quite common which can result in very serious problems, even making the whole wind tunnel experiment dumped.Over the past decade, due to the continuous development of sensor technology, wind tunnel experiments adopted more and more diverse types of sensors, which brought some new calibration problems. Certain types of pressure sensors, in particular, absolute pressure sensor, is no longer the same as before, using the unified approach to calibration is not suitable, and the calibration is becoming complicated and diverse. The improvement of the accuracy of the pressure sensor gets an increasing requirement of the standard pressure providing and the calibration of equipments.In this case, we are going to develop a set of multi-channel pressure sensor automatic calibration system based on the existing equipment, in order to satisfy most of the sensor calibration of our wind tunnel experiments.