| In modern production and life, temperature is an important parameter in many occasions. In many places, it is necessary to monitor the temperature parameter and making relevant processing so that the system runs in the best state. Therefore, it is significant to develop a reliable and practical temperature monitoring system. With the rapid development of wireless transmission technology, short range wireless transmission technology has been widely applied to many places where wiring is not available, offering great conveniences for people.This paper puts forward that the wireless temperature data acquisition system is built with the RF transceiver chip (nRF905) as the core, and its guiding ideology is modularization, The system is consists of collection module and wireless transmission module. The data acquisition module detect temperature data with digital temperature sensor DS18B20, then the simply processed data is sent out by the RF transceiver chip (nRF905). By analyzing on structure of the temperature sensor (DS18B20) and the electronic component (MCU), a reasonable acquisition pointer hardware circuit is designed and corresponding control software is compiled. Similarly, wireless transmission module sent, received and processed data by the nRF905 chip. Because of the nRF905 RF chip is integrated of MCU, therefore.nRF905 chip have the function of data processing, RF transceiver, automatic CRC checking and so on. Because of high integrity few peripheral devices, the circuit design of hardware is relatively easy. The softwares compiled for wireless transmission module and acquisition module are cooperated to make the entire system run normally.By testing and debugging, it is confirmed that the data acquisition system meet the requirements of short-range wireless communications with the data acquisition rapid, accurate and reliable. Such a rapid and convenient data acquisition and wireless transmission system will be widely applied in modem industry and research fields. |
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