Commissioned by Birkbeck ToddlerLab, University of London, to develop wearable devices for use within their research projects.

The wearables capture, in real-time, time-correlated data from sensors, including.

• Actigraph incorporating 3-axis accelerometer and 3-axis gyroscope.
• Position (GNSS)
• Continuous audio recording, including a configurable mute period with the press of a button
• Image recording: images are not recorded when the audio is muted
• Proximity to a paired device.

Combined with a custom remote ECG sensor streaming raw and Heart Rate data to the central unit to be recorded, the units can operate for up to 10 hours on a single charge. Data is stored on an SD card with unit configuration via a Windows/MAC GUI to adjust parameters and active sensors during a recording session.

The commission covers the design and manufacture of bespoke electronics and associated embedded firmware development, including custom mechanical enclosure design and manufacturing of enclosures.

The devices are deployed in pairs, one for the baby (from 2 months) and a parent. They also operate in a teacher and multiple students.