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Bluesense offgas sensors7/27/2023 ![]() ![]() Out of the box, the firmware is designed to allow to acquire simultaneously motion data, sound, and external ADC inputs. 2 sigma-delta digital microphone inputs.Multimodal sensing and sensor researchīlueSense has extension ports allow to plug-in daughterbords. The processor is also fast enough to implement a variety of real-time algorithms. The IMU and sound data can either be logged on an SD card or streamed over USB or Bluetooth 2.Ī typical application of BlueSense would be to acquire data for motion-based or sound-based activity and context recognition. The actual microphone array algorithm has to be implemented by the user (e.g. The microphones are spaced to enable broadside or endfire arrays with a nominal frequency of 8KHz. The platform can acquire data from the built-in digital microphones at 8KHz or 16KHz. It also provides the device orientation in quaternions in an earth coordinate system. The platform provides access to the raw data of the 3D accelerometer, 3D gyroscope and 3D magnetometer. Wearable motion & sound sensingĪs a wearable platform, BlueSense is a tiny device which can be used to capture body movement and orientation with a 9DoF motion sensor. It’s primary purpose is to be a motion and sound sensing platform for wearable sensing and computing applications.īesides this, the platform can be used in IoT applications or for sensor research. The platform is 30x30mm in size - smaller than an Apple Watch - making it suitable for a wide range of wearable sensing applications, or integration in objects or furniture for ubiquitous computing applications.īlueSense4 is designed to be functional out-of-the-box yet extensible. Data can be streamed over USB or Bluetooth, or stored on the local SD card. Multimodal sensing firmware, allowing to simultaneously acquire motion data, sound and external ADC inputs, without any programming.External EEPROM with one-time programmable area to store configuration data or unique device ID.12-bit DAC output on the expansion connector with firmware built-in signal generation capabilities.Two digital microphone inputs on the expansion connector, therefore allowing to have up to 4 independent audio sources or to design an array of 4 microphones.The microphones are spaced to enable broadside and endfire microphone arrays tuned for an 8KHz frequency response (to be implemented in software). Two digital microphones for ambient sound sensing with nominal frequency up to 16KHz.The platform provides raw IMU data as well as device orientation in quaternion (inferred in software). Improved 9DoF intertial mesurement unit (ICM-20948) with lower power consumption.The microcontroller includes a floating point unit (FPU), which makes the platform suitable for e.g.ARM Cortex M4 microcontroller (STM32L496), running at 20MHz but capable of up to 80MHz. ![]() NoveltyīlueSense4 is an evolution of BlueSense with these key advances:
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