基于幅移鍵控技術(shù)ASK（Amplitude-Shift Keying），以C8051F340單片機(jī)作為監(jiān)測終端控制器，C8051F330D單片機(jī)作為探測節(jié)點(diǎn)控制器，采用半雙工的通信方式，通過監(jiān)控終端和探測節(jié)點(diǎn)的無線收發(fā)電路，實(shí)現(xiàn)數(shù)據(jù)的雙向無線傳輸。收發(fā)電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線，天線直徑為（3.4±0.3）cm。試驗(yàn)表明，探測節(jié)點(diǎn)與監(jiān)測終端的通信距離為24 cm，通過橋接方式，節(jié)點(diǎn)收發(fā)功率為102 mW時(shí)，節(jié)點(diǎn)間的通信距離可達(dá)20 cm。與傳統(tǒng)無線收發(fā)模塊相比，該無線收發(fā)電路在受體積、功耗、成本限制的場合有廣闊的應(yīng)用前景。
Abstract:
Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller， using half-duplex communication mode， this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter （3.4±0.3） cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm，the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules， the circuit has wide application prospect in small size， low cost and low power consumption and other characteristics.
