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monitoring a patient’s vital information remotely. Consider a patient who is staying at his home but for whom it is important that his physician monitor his heart rate and blood pressure continuously. In this system, an IEEE work can be used to collect data from various sensors connected to the patient. The standard uses 128bit Advanced Encryption Standard (AES) technology to securely transfer data between ZigBee devices and other works. Figure is a simplified diagram of a remote monitoring system. A patient wears a ZigBee device that interfaces with a sensor, such as a blood pressure sensor, that gathers the information on a periodic basis. Then this information is transmitted to a ZigBee gateway. A ZigBee gateway provides the interface between a ZigBee work and other works, such as an Inter Protocol (IP) work. The patient information is then transmitted over the Inter to a personal puter that the physician or nurse uses to monitor the patient. This system could help hospitals improve patient care and relieve hospital overcrowding by enabling them to monitor patients at home. Other Applications Hotel Guest Room Access ZigBeebased systems can replace the magic key card systems used in hotels to access guest rooms. The traditional room access plastic cards have a magic strip on their back。 the card reader installed on the guest door reads the information encoded into the magic strip to allow or deny access to the room. Installing this reader for each door requires wiring through the door. Alternatively, a ZigBee based room access system includes a portable ZigBee device that acts as the key and a batterypowered ZigBee device inside the door that locks and unlocks it. Unlike the traditional method, the ZigBeebased room access system does not require wiring each door, which reduces the installation cost. Fire Extinguishers Fire extinguishers should be checked every 30 days to make sure all the canisters are charged and pressures are correct. Instead of checking the extinguishers manually, in a ZigBeebased monitoring system a sensor is attached to each extinguisher to monitor its status and wirelessly municate with the coordinator when maintenance is needed. A ZigBeebased monitoring system not only saves time and labor cost, it also helps improve fire safety by immediately alerting authorities if a fire exti nguisher is not working properly. ZigBee/IEEE 網(wǎng)絡(luò)應(yīng)用實(shí)例 ZigBee 非常廣泛的應(yīng)用,包括智能家居、庫(kù)存跟蹤和醫(yī)療保健,但又不僅限于此。 本章 回顧了 許多可以 運(yùn)用 ZigBee設(shè)備提高效率和降低成本 的應(yīng)用實(shí)例 。完整的 ZigBee 協(xié)議 具備 可靠的 網(wǎng)狀 網(wǎng)絡(luò) 性能的優(yōu)點(diǎn) 。然而 , 如果應(yīng)用 很簡(jiǎn)單 ,也 可能 僅使用 IEEE 。 智能家居 智能家居 是 ZigBee 無(wú)線網(wǎng)絡(luò) 的 一個(gè)主要應(yīng)用領(lǐng)域 。 在本節(jié)中 , 回顧 了 大量這樣的 用例 。 在 智能家居 中 典型的數(shù)據(jù)率只有 10 Kbps。 圖 了在一個(gè)典型的住宅建筑 中的 一些 可行 的 ZigBee 應(yīng)用 。 在 本 章 中對(duì) 圖 中 展 示 的 大多數(shù)應(yīng)用 作了簡(jiǎn)要 介紹 。 安全系統(tǒng) 一個(gè)安全系統(tǒng)可以由多個(gè)傳感器 組成 , 包括運(yùn)動(dòng)探測(cè)器、玻璃破碎傳感器和安全 攝像頭。這些設(shè)備需要通過(guò) 有 線或無(wú)線網(wǎng)絡(luò)與 中央 安全 面板通訊 。 基于ZigBee的 安全系統(tǒng) 簡(jiǎn)化了安全系統(tǒng)的 安裝和 更新過(guò)程 。盡管 ZigBee的數(shù)據(jù)率 很低 ,但 它 仍然 可以 無(wú)線傳輸 質(zhì)量 可接受的 圖像。例如 , ZigBee 已被應(yīng)用于 一個(gè)錄制門外訪客 視頻傳送到 住宅 里 一個(gè)專用 監(jiān)控 器的 無(wú)線攝像系統(tǒng) 。 圖 可能 啟用 ZigBee設(shè)備 的 典型居住建筑 抄表系統(tǒng) 電表需要定期 讀取數(shù)據(jù) 生成水電費(fèi) 賬單 。 一種 方法是手動(dòng) 讀 取 房主 房屋前 的電表數(shù)值,然后 輸入到一個(gè)數(shù)據(jù)庫(kù)。 一個(gè)基于 ZigBee的 自動(dòng)抄表 系統(tǒng) ( AMR)可以 自發(fā) 創(chuàng)建 一個(gè)連接 住宅區(qū) 電表 與 電表 公司辦公室的無(wú)線網(wǎng)狀網(wǎng)絡(luò)。 AMR 通過(guò) 遠(yuǎn)程監(jiān)控住宅的電力、煤氣和水的使用 的機(jī)會(huì),并且淘汰了人力每月挨家挨戶去查電表的方式。 AMR 的 作用 不僅僅是 傳輸每月水電 使用量數(shù)據(jù) ; 它 還 可以收集 詳細(xì)的使用信息 , 自動(dòng)檢測(cè)泄漏和設(shè)備問(wèn)題 ,協(xié)助入侵檢測(cè) ?;?ZigBee 的 無(wú)線設(shè)備不僅執(zhí)行監(jiān)控 任務(wù) , 他們 還 可以