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首頁 > 新聞中心 > 新聞中心

WMRNET-IV 低功耗水表、燃氣表無線抄表系統 - APPCON

時間:2012-01-17點擊數:8018


WMRNET-IV是專為水表、氣表集抄開發的無線自組織網絡系統,網絡采用非常穩定MESHSTAR復合網絡結構,組網速度、抄表速度快,一次抄表成功率非常高,抄表成功率超過99%。網絡的特點是節點模塊采用SEMTECH LoRa擴頻技術和網絡低功耗運行,在水表與燃氣表整個設計生命周期內節點模塊無需更換電池。同時,網絡節點擁有目前強大的穿透力和廣大的覆蓋范圍,網絡內模塊節點之間通訊距離超過1千米,室外網絡覆蓋超過6千米,非常適用于大型及超大型工業樓宇群、超高層建筑社區。

網絡工作于433MHz470MHz頻段,由無線集中器APC950、無線網絡節點模塊APC340F、路由器組成,適用于市場主流的各種脈沖、光電水表和燃氣表。



網絡系統采用主從式機制,集中器控制網絡的一切活動。一個集中器可以控制2560個節點及若干個路由器,路由器可支持8級路由。節點模塊圍繞路由器組建STAR網絡,路由器再組建MESH網絡與集中器通信。節點模塊亦可與集中器直接進行通信,但只有一級節點與集中器通信,大于一級節點必須經過路由器與集中器通信。系統在上電以后,系統自動組建網絡,自動維護和優化網絡路由,無需用戶干預,自動發現和刪除節點或路由器。新節點或路由器在一定時間內可以被網絡發現,節點或路由器地址被網絡識別后將被加入到網絡中,被移除節點和路由器的路由等信息在可設定的時間內被刪除。


WMRNET-IV的路由器MESH網絡部分中,任意路由器既可以作為子節點,又可以作為父節點。任意節點支持多個父節點,任意節點有多條到達集中器的路由,并且節點傳輸數據時動態的選擇優化路由,任意節點都具有路由器與中繼功能。處于級數比較多的節點,向集中器傳輸數據的時候,通過上一級父節點轉發數據,然后它的父節點再通過其它節點傳輸到集中器,每個節點有多個父節點,使網絡更加可靠,同時擴大了網絡的覆蓋面積。若在網絡中若干個節點出現故障,或者被移除,絲毫不會影響網絡的通信,集中器可以通過其它節點找到失去父節點的節點。通過集中器發送命令,可以了解網絡路由器及節點的數量、地址、級數以及路由等情況。



(作者:admin)

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