Abstract

In order to solve the problem of high precision acquisition of weak signals, a high accurately weak signal acquisition system has been designed in this paper. According to the proposed design requirements of the data acquisition system, the hardware acquisition circuit and the drive circuit as well as the processing of the upper computer are divided into modules. As the central work of this paper, the hardware and software of the drive modules are designed with specific flowcharts are given. And the designs of the system were debugged, analyzed and tested through experiment tests, and the high precision data acquisition of 0.5V DC signal has been obtained with specific datum are provided. The effectiveness of the proposed design to data acquisition of weak signal has been validated by the experimental results, and this design could be used in engineering projects.

Highlights

  • With the development of electronic technology and sensor technology, data acquisition systems have been widely used in military, radar system, aerospace and other fields[1]

  • In order to solve the problem of high precision acquisition of weak signals, a high accurately weak signal acquisition system has been designed in this paper

  • According to the proposed design requirements of the data acquisition system, the hardware acquisition circuit and the drive circuit as well as the processing of the upper computer are divided into modules

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Summary

Introduction

With the development of electronic technology and sensor technology, data acquisition systems have been widely used in military, radar system, aerospace and other fields[1]. Analog quantity such as the temperature, the pressure and the flow rate collected by the corresponding sensors are usually transformed into electrical signals which could be utilized by the systems[2]. It is necessary to design the drive modules of the weak signal acquisition system, and to test on its data exchange with the upper computer.

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