High-speed Portable Data Acquisition System Developed

The thesis discusses about constitution of the system and anti-interference technology of High-speed Portable Data Acquisition System, and introduces the research and realization of High- speed Data Acquisition Module, which includes hardware designing and software programming. The specific subject of the thesis is hardware designing of Data Acquisition Module. This thesis detail on the implement of three components of the Module, which are analog input/output, digital circuit and communication via EPP interface, and discusses about key technologies such as Signal Condition, amplifier, filter, Analog-to-digital converter, data store, data transmission and anti-interference of High-speed Data Acquisition System. Software programming based on Dynamic Link Library (DLL) is also presented in the thesis. It is convenient for data acquisition and data management by making use of database. The measured data and detailed error calculation are given in the thesis. The system has higher performance-price ratio, wider bandwidth and higher accuracy, while used along with software, it is not only used as a normal data acquisition system, but also used as virtual instruments, such as oscilloscope, universal meter, etc. At present, the project has been successfully passed through formal testing.