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This paper conducts a comparative study for zone differentiation techniques using two types of linearly polarized directional antennas. The antenna types are microstrip single patch and microstrip array patch. We employed array patch antenna with three elements in a previous work to track and identify hospital staff who approach patient's bed space. However, there was an inaccuracy in detection due...
This paper presents a low power autonomous system to prevent the spread of nosocomial infections within hospital environment. It employs two combined techniques which are the (1) 868 MHz radio frequency and (2) 40 KHz ultrasound waves. A wearable device for hospital staff and a main unit ensuring coverage for all bed's surroundings have been designed. The wearable device consists of a radio transceiver...
Analysts predict that by 2020, more than 50 billion devices to be deployed and interconnected to serve Internet of Things (IoT) applications. However, battery powered devices are vulnerable to periodic battery replacement as their operating time gets limited, and this indicates a high operational and maintenance cost which will affect the economic viability to deploy devices. As a consequence, the...
This paper presents a low power Wireless Safety Detection Sensor (WSDS) system to prevent fatal accidents with vehicles on construction sites. It helps providing increased safety for construction workers and eliminates back over accidents. The system employs three combined techniques which are the (1) 868 MHz radio frequency, (2) directional antennas, and (3) 40 kHz ultrasound waves. In order to secure...
This paper presents a design of a batteryless and wireless system that can be used in hospitals to call nurses. Compared to actual nurse calling systems, the proposed transmitter neither needs batteries nor long wires to provide energy. Therefore, it is maintenance-free and can be easily installed. The key feature of the proposed system is that it will harvest its energy from motion. When a patient...
This paper proposes an energy harvesting system for wireless, wearable, and low power health care applications. It discusses the design of a bracelet-like device that converts the difference of temperature between the human body and ambient surrounding using a thermoelectric generator (TEG). The temperature difference causes a small potential difference; an ultra-low voltage is supplied to a step-up...
This paper presents a design of an indoor localization system that can be used in hospital nurse calling systems. The call button of patient is batteryless and wireless. The positioning system is developed for this batteryless button. When the switch is pressed, a wireless telegram is sent to reference nodes that act like Wireless Sensor Networks (WSN). This wireless message contains the module ID...
This paper presents a printed electrically small monopole antenna for outdoor parking wireless car detector. The system relies on a network of wireless sensors (one for each parking space) to transmit whether or not a space is occupied using the 868 MHz and 915 MHz ISM bands. In parking, the maximum distance separating two cars doesn't exceed 5m. However, the wireless detector has to communicate with...
This paper presents component-level research that has been carried out at the University of Applied Sciences in Switzerland. A number of innovative technologies such as multi-protocol RFID sensing transponder, energy harvesting, RFID transponder with a freely programmable processor, quality model for agricultural and meat products, and computing aspects, have been developed, applied and evaluated...
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