A multi-channel real-time telemetry data acquisition circuit design

Abstract

The paper presents a multi-channel real-time telemetry data acquisition circuit based on FPGA. The design achieves analog signals acquisition using the method of multi-access time-sharing acquisition. In the data acquisition circuit design, the transmission and collection of analog signals are easy to be disturbed. In order to solve the signal distortion occurred in the collection process, combining with the actual situation of the circuit, the paper analyzes and discusses the reason of the abnormal phenomena occurring in analog signal transmission, suggests improvements in the hardware analog signal conditioning circuit design, and optimizes the AD real-time sampling sequence. By practically using, analyzing and testing, the improving methods are presented in the system are realized to greatly simplify the hardware circuits and improve the precision, reliability and stability. © 2013 Springer-Verlag.