Bluetooth devices help prevent stray children

FDK and Fujitsu (Japan) have jointly developed ultra-thin devices to help children avoid straying.

The newly launched prototype is 50 x 30 x 2mm, weighs 5 grams, includes a low power bluetooth transmitter (BLE), a battery pack, accelerometer sensors, and navigation. The device can be used on clothing, tracking motion due to data transmitted through the BLE.

To prevent a child from straying, the device sends certain BLE data cycles to a smartphone. When the intensity of the signal drops below a certain level, the device sends a warning to the user. This device can also be used to prevent luggage loss.

Currently, the device's battery can be used continuously for 7 days. However, since the battery can not be replaced, the device is only usable once. FDK says the company is developing rechargeable lithium-ion batteries for this device so it can be used multiple times. Accordingly, the lithium-ion battery is fitted with an antenna that supports wireless power transmission technology, so it can be wirelessly charged.