Design of Wireless Test and Measurement System with High Sampling Rate Based on WSN

The usual wireless sensor network based on MCU (micro-control unit) is not suitable to test fast changing signals. We designed an intelligent wireless test and measurement system based on wireless sensor network, which can be applied to measure the fast dynamic signals. Changeable sampling rate is designed according to the specific application background in this system. CPLD (complex programmable logic device) is used as the main controller for the high and changeable sampling rate and MCU cooperated with a transceiver for the communication of node. A "first-memory-then-transmission-mechanism" (FMTTM) and a two stages mechanism are proposed, which based on the limited hardware resource. These mechanisms deal well with the relation of the system performance and limited resource. The experiments indicate that the system works well and its design is successful based on ad-hoc network. The complicated system with intelligence can measure a field signal from 1 Msps to 200 Ksps sampling rate reliably and accurately.

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