Research on Portable Data Acquisition Devices

This paper presents a comparative analysis from a portable leak detector acquisition device with one-chip computer DSPIC33F to an NI acquisition device with Labview software. Based on the DSPIC33F microcomputer portable leak detector data acquisition device, the use of dipole device to collect the effective ground potential difference signal. Signal conditioning circuit, high speed A/D conversion, through the microcontroller to calculate the collected data, the measurement results will be displayed on the LCD screen, according to the results of leakage localization by manual means. Then according to the calculated data and sampling time according to the unit stored in the external RAM for data storage, but the microcontroller in the use of a great deal of complexity and limitations in the actual use of the process of a lot of problems, and NI produces high-precision instruments can not only greatly improve the accuracy, and also has a great deal of tolerance, can be used in a more severe environment, the host computer through the USB transmission, the data is transmitted through the The data is collected from the host via USB transmission and processed by LABVIEW to automatically form a graph, which further facilitates the analysis.