| dc.description.abstract | In recent years, the Internet of Things and wireless sensing technologies have been widely
used in structural health monitoring. Most of these systems are battery-powered and must
sleep periodically to extend battery life. In addition, most systems are built in areas that
are difficult to reach, and often use transmission relay stations (including data capture
devices) to transmit back to remote data platforms via wireless methods such as 3G/4G.
In practice, fixed relay stations will be damaged due to disasters and other events, so you
should always be prepared for temporary relay stations; again, relay stations should be
located in fixed locations. In theory, the higher the better, but in practice, it is difficult to
do so, so UAV is useful. Thoughts. Therefore, the purpose of this research is to develop
and integrate LoRa (Long Range) and UAV (unmanned aerial vehicle) mobile gateway
(UAV-based Moving Gateway) that integrates LoRa (Long Range) and permeance wake
technology, and completes the preliminary UAV structural health monitoring IoT
architecture, including The ground monitoring center is used to send wake-up messages
and sent to the UAV mobile gateway via LoRa wireless transmission, and to monitor the
UAV mission and flight status through the mission planner interface; the UAV mobile
gateway uses quadrotor drones and MCU (Micro -Control Unit) The control board is the
main core. The microcontroller (MCU) integrates various sensors and microcontrollers,
such as low-frequency transmitting antennas and LoRa, to receive instructions from the
ground monitoring center, and then transmit the instructions LoRa is wirelessly
transmitted to the sensing node, or the low-frequency transmitting antenna triggers the
wake-up of the sensing node to operate through MI (Magnetic Induction) technology, and
then receives the data returned by the sensing node, and transmits it to the ground
monitoring center by LoRa wireless transmission; The sensor node is composed of a
microcontroller (MCU) as the main core. The microcontroller (MCU) integrates various
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sensors and microcontrollers, receives instructions from the UAV mobile gateway, and
then detects The sensing data obtained by the device is wirelessly transmitted back to the
UAV mobile gateway. The results of this research show that the system can successfully
remotely use to wake up the sensing node in sleep and send a signal to wake it from sleep.
When the low-frequency antenna is powered by 12V, the trigger distance is about 1 to 3
meters. In LoRa, there is almost no signal delay and packet drop rate at short distances.
If 4G or 5G communication is added, the usability of UAV mobile gateways will be
improved. | en_US |