This is a quick start guide through the fundamentals of Muse platform.
2. System Description
Muse is a low power, miniaturized, wireless multi-sensor logger, incorporating state-of-the-art sensing technology into a compact, robust, customizable, and easy-to-use solution. Muse combines inertial and environmental sensors together with on-board flash storage, wireless connectivity, automated on/off functions and regulated rechargeable power, providing a versatile system for data acquisition in a multipurpose fashion. It’s a fully certified, safe, production and professional research platform for wearable and connected industrial use cases.
3. Power On/Off
- To Power On the device, hold pressed the button, centrally located on top of the device, for at least 4 seconds. The blue LED indicator starts blinking and the system is ready.
- To Power Off the device, hold pressed the button until the blue LED indicator goes off.
- If properly configured (i.e., mode and frequency), the smart button allows also to control the data acquisition in log mode.
4. Recharge Battery
To recharge the battery, connect the USB cable. The green LED indicator breaths when recharging. When fully charged, the green LED indicator stop breathing.
Muse uses a rechargeable lithium-polymer battery and includes circuitry for both thermal and electrical protection against over-voltage and over-current conditions. As with any lithium-polymer battery-powered device, the following should be observed:
- do not disassemble, crush, puncture, shred the battery
- do not let the battery to get in contact with water or other liquid
- do not short the battery contacts to metal objects
- do not place the battery near thermal heat sources.
5. Operating Mode
Muse can operate in 2 modes:
It allows for managing a continuous data stream to a master application typically running on desktop or mobile platforms. It requires a stable BLE connection.
It allows for data log into the external flash memory integrated on device. It can be controlled using BLE connection or smart button, if properly configured. In both modes, the system can be powered by battery or by cable, typically USB Type-C.
6. System States
Independently from the operating mode, Muse can only assume one of the following states at a time:
Ultra-low power operating condition.
Standard system condition (e.g., system in advertising and receptive to connection and commands).
It manages data streaming via BLE.
It manages acquisition and saving of data on board.
It manages the file offload from external flash memory integrated on device.
State used to manage firmware update (i.e., the device must be restarted in boot loader mode).
7. Compliance and Warning
Muse implements a Right-Handed coordinate system, where the x-axis is outgoing with respect to the USB, while z-axis is outgoing from top of the board. Each rotation is clockwise positive with respect to the relative axis
FIGURE 2: MUSE V3 PLATFORM WITH ITS REFERENCE SYSTEM. X (RED), Y (GREEN), Z (BLUE) AXES.
Magnetic distortions (e.g., proximity to metal objects or electromagnetic fields) can affect the accuracy of the heading estimation.
Muse is supplied with the following default configuration and previously calibrated (i.e., gyroscope and accelerometer). However, it is always recommended to perform a calibration of the magnetometer to setup the overall system to the environmental conditions of use.
|Gyroscope full scale||2000 dps|
|Accelerometer full scale||16 g|
|Magnetometer full scale||4 G|
|Accelerometer full scale (HDR)||100 g|
|Log mode||9 DOF (i.e., gyr / axl / mag)|
|Log frequency||500 Hz|
To customize Muse settings run Muse viewer software application and connect the device.