| Based on the development and test of a manufacturer’s receiving and transmitting module,this paper combines the function of virtual instrument technology with test instrument and realizes the data management of receiving transmitting module test system by utilizing the characteristics of Access database,safe,convenient and easy to operate.The test system database is divided into user information database,process information database and the result database.The user information database is used to test the system user management;the test information database is used to store a large number of test functions and input and output parameters in the test program to realize the parameter configuration in the test process;the result database is used to store the test results of each tested module and provides a variety of query methods for the convenience of users’ s result analysis.In addition,the signal analysis program is an important tool for data management.The engineering practice of this test system shows that the application of mixed programming(such as the application of matlab and LabWindows / CVI)for signal processing can not meet the real-time requirements of the test process for its memory consumption seriously affects the speed of the test system.Therefore,based on LabWindows / CVI running platform,this paper develops the signal analysis software module by using C language.In view of the above,mainly the following work has been carried out:1)Completed the test system database logic mode and data table design;2)Achieved the test system data management functions,including user mana gement,test information generation and test result management and query.Compl eted the relevant user interface design and code writing;3)Generated the Excel data report using the ActiveX technology;4)Deeply analyzed the signal analysis methods such as pulse measurement method,fast Fourier transform,short-time Fourier transform and wavelet transform,and wrote the data processing module which is suitable for the test system of the project to meet the requirements of the real-time processing of the test data;5)In order to ensure the validity,security and stability of the test system,the software function modules realized in this paper were tested and verified.The core of this paper is the test system database design and the C language implementation of signal analysis algorithm.Reasonable database design can effectively manage a large number of data in the test system;the signal analysis software program achieved by using C language meets the real-time requirements of the test system. |
