Wan-Jung Chang

Real-Time Monitoring via Patch-Type Piezoelectric Force Sensors for Internet of Things Based Logistics

We propose the use of simple and low cost piezoelectric patch type force sensors for logistic applications to ensure safety of the package while also detecting damage suffered. The sensors are connected to a prototype readout system that can record the data and transfer it wirelessly via a Bluetooth module. The data can be received by an in-vehicle telematics device which can upload it directly to the cloud database, thus allowing real time monitoring of package condition during transportation. This logistics management model would aid in improving the quality of services provided by the logistics company while also earning consumer credibility. Thus, we believe that these patch type force sensors can be realistically implemented in logistics in the near future.

Real-time monitoring via patch-type piezoelectric force sensors for Internet of Thing in logistics

We propose the use of simple and low cost piezoelectric based patch type sensors that ensure safety of the package while also detecting damage during shipment. A tear off sensor located at the top of the package can identify if the package has been opened while an impact sensor located at the bottom can monitor the damage suffered. The sensors are connected to a low power prototype read out device with a microcontroller (MCU) unit to analyze the data and a radio frequency (RF) module to transfer the data wirelessly. It would be viable to have an on-vehicle telematics device for collecting and analyzing data from multiple packages wirelessly so that it can be uploaded to the cloud, thus allowing for real time monitoring during transport. This logistics management model would aid in improving the quality of services provided by the logistics company while also earning consumer credibility. Thus, we believe that these patch type force sensors can be realistically implemented in logistics in the near future.

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.

A real-time mobile emergency assistance system for helping deaf-mute people/elderly singletons

This paper presents an emergency assistance system for helping deaf-mute people or elderly singletons, called iHelp, which is a real-time emergence reporting mobile devices application software in smart phone. The proposed system not only assists deal-mute people or elderly singletons in the shortest possible time to report, the report also uses SMS intimate to achieve offline report.

A wearable-glasses-based drowsiness-fatigue-detection system for improving road safety

This paper proposes a drowsiness-fatigue-detection (DFD) system for improving road safety, which consists of a wearable smart glasses, an in-vehicle infotainment system (a vehicular telematics device), an automotive diagnostic bridge, and a cloud-based platform, etc. The proposed DFD system can real-time detect drivers state for drowsiness or fatigue. When detecting drowsiness or fatigue situation occurrence, thus the rear lights of the vehicle will automatically be flickered and message will be sent to the cloud-based platform, concurrently. Hence, the proposed system can effectively achieve the purpose of road safety improvement.