Noushin KARİMPOUR, Zuleyha AKUSTA DAGDEVIREN, Vahid AKRAM, Orhan DAĞDEVİREN

Hastaneler için Ultra-genişbant Konumlandırma Kullanan Bulut Tabanlı Varlık Takip Sistemi

Hastane enfeksiyonları, hastane ortamında mikroorganizmaların neden olduğu ölümcül hastalıklardır. Bu enfeksiyonlar, yoğun bakım ünitelerinde %70'e varan ölüm oranlarına sahiptir. Bu enfeksiyonla savaşmanın en önemli yolu hastanedeki cihazların ve eşyaların hijyenine dikkat etmektir. Bu bildiri kapsamında, IoT tabanlı gerçek zamanlı gelişmiş bir varlık takip sistemi hayata geçirilmiştir. Önerilen bu sistem üç ana bileşenden oluşmaktadır: El Hijyeni Gözetim Sistemi, Cihaz Takip Sistemi ve Enfeksiyon Kontrol Sistemi. Hastanelerde el hijyeninin sağlanması enfeksiyonların önlenmesi açısından kritik öneme sahiptir. Önerilen Hijyen Gözetim Sistemi sayesinde enfeksiyon riskinin en yüksek olduğu alanlar olan yoğun bakım üniteleri ve yenidoğan servislerinde el hijyeni kontrolü sağlanmaktadır. Ultra geniş bant (UWB) modüllerinden alınan sinyaller, bir konumlandırma algoritması tarafından işlenir ve konum bilgileri üretilir. 1-2 m hassasiyetli konumlandırma nedeniyle birçok senaryoda benzer çalışmalar yetersiz kalırken, UWB teknolojisi sayesinde önerilen sistem bu senaryolarda 20-25 cm hassasiyetle çözüm sunmaktadır. Antibiyotiğe dirençli hastane enfeksiyonunun tedavisi oldukça zordur, bulaşıcıdır ve ölümcüldür. Bu hastalığa yakalananlar mecburi olarak karantinada tutulmaktadır. Bu hastaların nakli sırasında uçtan uca hijyen kontrolü yapılması gerekmektedir. Geliştirilen Enfeksiyon Kontrol Sistemi kullanılarak system tarafından bu hastalar gerçek zamanlı olarak uçtan uca takip edilecektir. Sistemimiz 3 ana katmandan oluşmaktadır. İlk katmanda, ortamdaki dağıtılmış IoT cihazları, mobil düğümlerden yayınlanan UWB ve Bluetooth Düşük Enerji (BLE) sinyallerini toplar. Alınan sinyallerin gücü, çeşitli kök düğümlerinden alınan sinyallere dayalı olarak mobil düğümlerin konumunun hesaplanmasından sorumlu olan ikinci katmana gönderilir. Tespit edilen lokasyonlar, web ve mobil uygulamalar için gerçek zamanlı takip sistemi sağlayan üçüncü katmana gönderilir. Bu katmanda gerçek zamanlı konum verilerini kullanıcılara ulaştırmak için JSON, Ajax, WebSockets, MongoDB ve RestFul gibi farklı teknolojiler kullanılmaktadır.

Anahtar Kelimeler:

Nesnelerin İnterneti, Bulut Bilişim, Varlık Takibi, Ultra-genişbant, Konumlandırma, Medikal Sistemler, Hijyen Takibi

A Cloud-based Asset Tracking System for Hospitals Using Ultra-wideband Localization

Nosocomial infections are fatal diseases caused by microorganisms in the hospital environment. It has mortality rates of up to 70% in intensive care units. The most important way to fight this infection is to pay attention to the hygiene of the assets in the hospital. Within the scope of this paper, an IoT-based real-time advanced asset tracking system has been implemented. This system consists of three main components: Hand Hygiene Surveillance System, Device Tracking System, and Infection Control System. Providing hand hygiene in hospitals is critical for the prevention of infections. The proposed Hygiene Surveillance System provides hand hygiene control in intensive care units and neonatal services, which are the areas with the highest risk of infections. Received signals from ultrawide-band (UWB) modules are processed by a designed positioning algorithm. While competitors are insufficient in many scenarios because of the 1-2 m precision positioning, the proposed system provides a solution in these scenarios with 20-25 cm precision. Antibiotic-resistant nosocomial infection is difficult to treat, contagious, and fatal. These patients are kept in quarantine. During the transportation of these patients, end-to-end hygiene control is required. By using the developed Infection Control System, these patients will be followed end-to-end in real-time. Our system consists 3 main layers. In the first layer, the distributed IoT devices in the environment collect the broadcasted UWB and Bluetooth Low Energy (BLE) signals from the mobile nodes. The strength of the received signals is sent to the second layer which is responsible for calculating the location of mobile nodes based on the received signals from different anchor nodes. The detected locations are sent to the thir layer which provide the real time tracking system for the web and mobile applications. In this layer different technologies such as JSON, Ajax, Server Sent Events, WebSockets, and RestFul technologies are used to deliver the real time location data to the users.

Keywords:

Internet of things, Cloud computing, Asset tracking, Ultra-wideband, Localization, Medical systems, Hygiene Monitoring,

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