Up to 40 chained sensors
A motion-capture platform with compact sensors connected in a wired chain and a Bluetooth hub that transfers data to a computer or mobile device.
This modular platform captures motion using compact sensor boards and a central Bluetooth hub. Up to 40 sensors connect in a wired chain, with the hub forwarding measurement data to a computer or mobile device.
Each node combines acceleration, angular-rate and magnetic-field sensing. The system identifies each sensor’s position in the chain, allowing the configuration to be adapted to the tracking task.
Collect motion data from a configurable number of small sensor nodes while keeping their order identifiable. The architecture needs to connect the sensor chain to external applications through a compact hub.
HTS developed the sensor and hub electronics, embedded firmware, and integration with mobile and desktop software. The work covered the STM32-based sensing nodes, the nRF52 Bluetooth hub, data collection and identification of sensor order within the chain.
| Connection | Function |
|---|---|
| Motion sensor to motion sensor | Wired chain carrying sensor communication. |
| Sensor chain to hub | Collection of data from up to 40 nodes. |
| Hub to computer or mobile device | Bluetooth data transfer to external software. |
| Parameter | Specification |
|---|---|
| Maximum sensor count | Up to 40 |
| Hub board | 53 × 36 mm; Nordic nRF52 |
| Sensor board | 21 × 21 mm; STM32 |
| Sensing | Accelerometer, gyroscope and magnetometer |
| Sensor connections | Wired chain with JST interfaces |
| Node identification | Position in the sensor chain |
| External wireless connection | Bluetooth/BLE at the hub |
| Hub service interface | Micro-USB |
The design provides a modular motion-data platform with compact sensing nodes and a shared Bluetooth connection to external software. The number of connected sensors can be matched to the required measurement points.
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Share the measurements you need, the number of sensing points and the way the data should reach your application.
