Software System Implementation Of Preamplifier Tester Based On LabVIEW

Along with the increasing development of computer and electronic technology, virtual instrument technology was created based on the traditional measuring technology. The production of computer science and technology is constantly applied to virtual instrument technology and makes it play a growing role in measuring industry.In this paper, testing software system of preamplifier is implemented based on LabVIEW Version 7.1 .The required function of the testing software system is introduced. Overall objective and design concepts are explained. Then the flow design and implementation theory of five interfaces are concretely analysed, including log on interface, testing main interface, reports management interface, parameter modification interface and users management interface. The paper elaborates the testing main interface which concentrating most functions, explains the design concept and principle of different software processes for dissimilarity testing task. The paper gives accomplishing processes of eight test items, including gain test, cut-off frequency test, AC interference test, AGC test, AC channel transimpedance test, DC channel maladjusted voltage test, AC noise test, notch speciality test. Summarizes the key technique of the order control, text display and data transfer between interfaces in the testing main interface.As an auto-testing software, the report generation and management are the absolutely necessary part of testing system for managing tested data. It is one of the functions that users most focus on. So the paper introduces multiple techniques of report generation, including their respective specialities and application conditions. The emphasis is the methods to use File I/O functions and Report Generation toolkit in LabVIEW to generate different reports, and the concept of testing history discriminance. At the same time, the method and experiences to regulate report format according to users'practical demands is explained.In this project, the author has achieved works such as project establishment, system design, software programming, software and hardware united debug, software performance improvement and project qualification. The author proposes another kind of solution that based on data acquisition card for this project.The project has been consigned to the consumer for one year. In this period, the testing system worked well and the software system operated stably. As a result, the consumer put a high value on the project.