【摘要】：為了提高無線數(shù)據(jù)傳輸?shù)目煽啃?基于無線傳感器網(wǎng)絡(luò)(wireless sensor network,WSN)的溫室環(huán)境數(shù)據(jù)采集系統(tǒng),采用試驗(yàn)的方法研究溫室中不同環(huán)境下WSN節(jié)點(diǎn)之間通信的可靠性。在通信距離為5~40 m,存在作物、溫室設(shè)施等遮擋影響,相對(duì)濕度為35%~80%的情況下,對(duì)丟包率和接收信號(hào)強(qiáng)度指示(received signal strength indication,RSSI)的關(guān)系進(jìn)行研究,通過RSSI對(duì)節(jié)點(diǎn)間通信可靠性進(jìn)行評(píng)價(jià)。在此基礎(chǔ)上,提出WSN節(jié)點(diǎn)發(fā)射功率自適應(yīng)控制算法。該算法以RSSI作為通信質(zhì)量的評(píng)價(jià)因子,通過增大節(jié)點(diǎn)的發(fā)射功率來提高通信可靠性。測(cè)試結(jié)果表明,該算法能夠根據(jù)當(dāng)前通信狀況,自適應(yīng)地設(shè)置節(jié)點(diǎn)的發(fā)射功率,以盡可能小的發(fā)射功率將丟包率維持在1%左右。該算法對(duì)WSN在溫室中的應(yīng)用具有實(shí)用價(jià)值。
[Abstract]:In order to improve the reliability of wireless data transmission, the reliability of communication between WSN nodes in different environments in greenhouse is studied by means of experiments based on the greenhouse environment data acquisition system based on wireless sensor network (wireless sensor network,WSN). When the communication distance is 5 鈮，

本文編號(hào)：2511314