Design of Strain Signal Data Acquisition System for Wind Tunnel Balance Based on Zynq

Abstract

Wind tunnel balances, as the most important equipment in wind tunnel force testing, are responsible for the measurement of raw aerodynamic data in aerodynamic experiments. A multi-channel data acquisition system was designed to meet the needs of wind tunnel balance data acquisition. This article gives the hardware and software design of the data acquisition system. The hardware design adopts modular design, with Zynq-7000 series SoC chip xc7z020 as the control core, and LTC1053 composition instrument as the signal conditioning channel, combined with A / D conversion chip ADS8598S and wireless network card RT3070L to achieve data acquisition and transmission, and design self-calibration to improve system data acquisition accuracy and stability. In terms of software design, a dual-port BRAM (Block RAM) is used to implement buffering. Data is encrypted by the Advanced Encryption Standard (AES) algorithm and sent to the LabVIEW host computer through a wireless network card. Finally, the resolution of this data acquisition system is analyzed from the theoretical and measured dimensions.