Five-hole probe measurement system integrating calibration data

Abstract

The invention relates to the technical field of pressure testing, in particular to a five-hole probe measurement system integrating calibration data for a wind tunnel test or collection of inflow velocity and angle data during flight of an aircraft. The system is characterized by comprising a five-hole probe and an equipment box, the five-hole probe is in rigid fixed connection with the equipmentbox through a support rod, the equipment box is provided with a system rest button and a working state indicator light, a control circuit board is arranged in the equipment box, and a heat-dissipationvent hole, a stand-by power port, a USB communication serial port and a digital output interface are formed in the side face of the equipment box; a data display screen is arranged on the back face of the equipment box; the control circuit board comprises a minimum system circuit which comprises a micro-processor and a power supply circuit, and an external communication display circuit and a sensor data sampling circuit are arranged on the periphery of the micro-processor. Accordingly, the system reliability is improved, and development and maintenance time cost is lowered; the expandabilityis high, and a flight computer calculated load is lowered.

Description

technical field [0001] The invention relates to the technical field of pressure testing, in particular to a five-hole probe measurement system integrating calibration data used for wind tunnel experiments or acquisition of flow velocity and angle data during aircraft flight. Background technique [0002] In various wind tunnel experiments and aircraft flight, it is of great significance to accurately measure the incoming flow velocity and incoming flow angle. However, in actual use, the five-hole probe can only elicit the felt pressure of the five pressure measuring holes, and usually requires supporting gauge pressure sensors, atmospheric absolute pressure sensors and other sensing equipment as well as the calibration data provided with the probe to establish these five pressure points. The mathematical model of pressure value, incoming flow velocity, airflow angle, total pressure, static pressure and other parameters. Therefore, for the experimenters, it is necessary to u...

AI Technical Summary

Problems solved by technology

Therefore, for experimenters, it is necessary to use the pressure induction tube to lead the five-hole pressure to the laboratory sensor system, and compile a data processing program to establish a mathematical model based on the calibration data before starting to use it, and the time cost is relatively high.

At the same time, the pressure induction tube is usually a rubber tube, which is prone to problems such as bending and air leakage during use. Only one five-hole probe requires five pressure induction pipes. When the probe is used on a large scale and the pressure induction distance In a long environment, the pressure induction system is more likely to receive environmental interference and pipeline inspection is extremely inconvenient, and small air leaks are not easy to find, which seriously affects the accuracy of the experiment and even leads to errors in the experimental results

Images