Abstract: The disclosure is related to a method for avoiding misjudgment when detecting a human fall, and an apparatus thereof. When the apparatus worn on a person generates a collision signal, it determines if the apparatus was in a proper status in the past period of time before the collision according to the acceleration data. The apparatus was in the proper status if a specific axial direction of an accelerometer of the apparatus is substantially parallel with the direction of gravity, and the method goes on detecting the human fall; otherwise, the process is terminated. The acceleration data before and after the collision is compared with fall conditions set by a fall detection program. A fall event is determined if the acceleration data meets the fall conditions.

Abstract: A chained wireless communication system is provided. The system includes a main node and a plurality of communication nodes. The communication nodes are chained to form a chain network. The communication node can switch roles among a master connection unit, a slave connection unit and a signal scanning unit. The signal scanning unit can scan nearby terminal devices and generate scan packets. The scan packets are transmitted to neighboring communication nodes via the slave connection unit. The master connection unit of the neighboring communication node receives the scan packets. The scan packets are then delivered to the main node via this chain network. The main node retrieves a message delivered from the terminal device according to an identification message from the scan packets. The message delivered from the terminal device is used to locate the terminal device, notify an emergency event or serve as a sensing signal.

Abstract: A wearable device with movement indicator, a system and a method for movement indication are provided. The movement indication is implemented on the wearable device. The wearable device receives a movement instruction from a computing host. The movement instruction includes a direction signal that may be accompanied with further instructions such as strength and direction. The instructions are displayed through the movement indicator of the wearable device. A user who wears the wearable device moves in response to a moving instruction. A motion sensor of the wearable device senses a movement signal and obtains a moving direction. Other signals of strength and distance may also be obtained by the motion sensor. After that, the system can score the movement of the wearable device based on the original movement instruction.