Vibration, ultrasound and environmental sensor nodes for condition monitoring with Wi-Fi and cellular connectivity to cloud applications

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Solution Description

This Condition Monitoring and Predictive Maintenance framework combines smart sensor nodes that collect vibration, ultrasound and environmental data with Wi-Fi or cellular connectivity to a central data lake such as a Cloud service.

Critical vibration data is processed locally on an STM32L4+ microcontroller by combining 3-axis acceleration data from a 6kHz IIS3DWB vibration sensor and ultrasound data up to 80kHz from a MP23ABS1 microphone sensor, in order to generate frequency and time domain analyses such as FFT, RMS, and Peak Acceleration. Environmental pressure, temperature and humidity data is also collected by the LPS22HB and HTS221 sensors embedded on the node.

The very low power requirements of the MCU and the sensors allow for compact, battery-operated nodes driven by the STBC02 battery charger.

The STM32L4+ microcontroller supports wireless data transmission through an additional Wi-Fi module such as the Inventek ISM43362.M3G-L44, or via a cellular modem such as the Quectel BG96, which supports LTE Cat M1 and NB-IoT connectivity with a plastic Micro-SIM (3FF).

ST provides a Predictive Maintenance Dashboard application based on AWS IoT core and other AWS services to provision nodes, plot data, and configure triggers as part of an end-to-end solution







  • Key Product Benefits

    STM32L4R9ZI - Ultra-low power MCU plus high speed EEPROM

    Ultra-low-power microcontroller based on ultra-low power Arm Cortex-M4 32-bit RISC core with single-precision floating-point unit (FPU), digital signal processing (DSP) and memory protection (MPU) unit. This MCU allows high speed sensor data streaming at the maximum ODR, and the 2MB Flash can host machine learning algorithms for anomaly detection

    IIS3DWB -  Ultra-wide band vibration sensor

    Ultra-wide bandwidth (up to 6 kHz), low-noise, 3-axis digital vibration sensor is highly suited to applications involving vibration analysis up to 6kHz, both in terms of performance and cost.

    LPS22HB and HTS221 - High accuracy environmental sensors

    The LPSSHB digital pressure and HTS221 relative humidity and temperature sensors complete the data requirements for a comprehensive condition monitoring scenario.


    MP23ABS1 - Wideband MEMS microphone

    The wideband analog MEMS microphone up to 80kHz allows vibration data collection and analysis well into the ultrasound frequency range.