A USB data acquisition system in chemical laboratory

In the chemical laboratory, sometimes it is necessary to monitor some data, and store them for analysis. So a multi-channel USB data acquisition system was designed in the paper to achieve the real-time and high-speed data acquisition which is needed. In the system, the slave computer was composed of 8051 and AD7819 as data acquisition module. And it was connect with the host computer through the USB interface device PDIUSBD12. The application of the system was designed with Visual Basic 6.0, which can develop windows applications easily. Through system debugging, The system can effectively complete the data acquisition when working with chemical sensors in the laboratory. The system will give our laboratory technician great help in many situations.