Data Collecting System Based On USB Interface With Application

This thesis introduces a new kind Data-Collecting System based on Universal Serial Bus (USB) interface technology. The system represents a new trend in traditional industry control filed. The hardware design process for USB Interface Data Collecting System is introduced here, the developing of Firmware is discussed in detail, and the procedure of developing device drivers in WDM models via DDK is also given to the readers. The User program is also included in the thesis. In order to prove the validity of this system, the thesis uses successfully in an experimental system that is a Liquid Level Position Control System for Double Ponds. And the characters of this apparatus have been improved greatly.The first part of the thesis describes the components of Liquid Level Position Control System for Double Ponds. And at the same time, some basic knowledge of USB Specifications is given.The second part tells us the way of hardware design for this Data Collecting System. It includes the Data Collecting Circuit and PDIUSBD12 operation circuit. MCU is the center unit that controls all the components in the board. In addition, the thesis describes how to design firmware in detail.The third part introduces Windows Driver Model recommended by Microsoft. The method of developing device drivers via DDK and debugging ways are discussed here.The fourth part gives ways of realizing user model program and functionality.The last part of the thesis summarized the design plan of this system and the successful application in Liquid Position Control System for Double Ponds. The prospect of this system is pointed out.