A configurable multi-channel high-precision analog quantity acquisition system and method

Abstract

The invention provides a configurable multi-channel high precision analog acquisition system and method. A DSP+FPGA controller framework is adopted and high data throughout and processing capacity ofan FPGA are utilized, so that control and logic time sequence of the acquisition system is realized. A DSP is utilized for realizing complex algorithm processing. An IEEE-1394B high rate serial bus, high speed transmission of data is realized. The system can work in a single-end voltage collection mode, a differential voltage collection mode and a BIT working mode, so that flexible configuration of the system is realized. Share of one scaling-up circuit and an AC converter by multi-channel analog input acquisition is realized, so that hardware design is simplified. Through data treatment, system errors are reduced, gross errors are removed, system acquisition precision is improved and a complete BIT strategy and an interface protection function are achieved. At the same time, the system has characteristics of high acquisition precision, high reliability, small size and has great significance in improving acquisition speed and control performance of the whole aircraft analog acquisitionsystem.

Description

technical field [0001] The invention belongs to the technical field of airborne analog quantity acquisition, and in particular relates to a configurable multi-channel high-precision analog quantity acquisition system and method. Background technique [0002] The aircraft electromechanical system contains a large number of analog input sensors such as temperature, flow, pressure, liquid level, and speed, and the requirements for its measurement accuracy, acquisition speed, and data stability are getting higher and higher. On the other hand, in order to reflect the characteristics of the measured object more truly and accurately, many test items turn to dynamic parameter testing. The analog acquisition system is an important part of the aircraft electromechanical management data acquisition system. Its data throughput, acquisition accuracy, processing speed and system reliability directly affect the control indicators of the aircraft electromechanical management system. There...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional aircraft analog acquisition systems are realized by single-chip microcomputer or digital signal processor, which is difficult to meet the real-time requirements of high-speed data acquisition system due to the limitation of clock frequency; data transmission is generally realized by low-speed serial bus, and its data transmission rate is low. Poor flexibility, unable to meet the dynamic test requirements of data acquisition; acquisition errors are generally difficult to correct, resulting in limited acquisition accuracy, seriously affecting aircraft control performance

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