A Rf-based Wireless Data Acquisition System

The paper contains content with a kind of wireless data acquisition system based on RF, which designed by the receiving and dispatching chip NRF401 .The paper explains detailedly the design approach, method, procedure, provides the concrete realization scheme and carries on the test of the multiple performance indexes in designed system .During the design procedure, the system is divided into four major modules according to the functional structure, namely data acquisition module , wireless communication module, serial bus module and computer dealing module. Data acquisition module realizes mainly to acquisit data on the spot ,wireless communication module is made up of NRF401 wireless chip, which main design function is data transmission wirelessly. The module of serial bus finishes duty with communication and transmission to computer after the wireless communication module have received the useful data. The computer module displays and deals with the data through the visual, friendly programming interface.Final achievement of the system design is a data acquisition equipment, which connects with PC through serial cable.The system is small,exquisite,easy to use and no needing outer power.Attenbant operate system throught the interface with computer, which is very convenient to operate .Through a large number of performance parameter test, the system display many fine characteristics, that are lowerly environmental request, high sensitivity,steady performance, far transmitting distance ,convenient interface.These many good performance characteristics make it can be applied to a lot of fields extensively,such as vehicle control, wireless control, hydrometeorology control, biological signal acquisition, and etc. In a word, the system has extensive application prosperity.