Liang-Bi Chen

Design of a low-cost level-triggered Zigbee network multi-application sensor in smart homes

In this paper, we propose a low-cost Zigbee network based multi-application sensor, which is capable of door open/close and water leakage detection for smart homes. The proposed multi-application sensor consists of a MCU, a tamper switch for anti-theft, and a water-leak switch for detecting water leakage or a reed switch for opening/closing door. We design a unique firmware program executing on the MCU, which can be achieved multi-application by sharing the same program. Moreover, three level-triggered signals are encoded to different endpoints and zone type, respectively. Thus, the designed firmware can judge these three level-triggered signals to map their responding application. As a result, the proposed multi-application can reduce 41.67% code density in firmware program to achieve a low-cost purpose.

i-Logistics: An intelligent Logistics system based on Internet of things

This paper proposes a cargo management system, named i-Logistics, which consists of an electronic tape (e-tape), a QR code scan APP, an in-vehicle infotainment system (a vehicular telematics device), and a cloud-based platform. The dedicated Polyvinylidene fluoride (PVDF) sensors are mounted on the electronic tape for monitoring cargos. The QR code scan APP is used to burn a matching dedicated ID from QR code of Cargo, to electronic tape via BLE. The related messages of the dedicated ID and cargo status (such as broken and loss) are also sent to in-vehicle infotainment (IVI) system by BLE. Furthermore, the abnormal notified messages will be real-time recorded and uploaded to the cloud-based platform via 3G/4G networks when aberrant status of cargos is occurred. As a result, the proposed system can efficiently help to understanding the status of cargos and giving necessary assistance, during truck transportation process.