STEVAL-MKI137V1

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Evaluation boards can be a great way for engineers to quickly comprehend and work with a new sensor or any other type of device. The STEVAL-MKI137V1 is a particularly interesting evaluation board as it offers a wide range of features to work with. In this article, we\'ll discuss the application field of the board and its working principle.

Application Field

The STEVAL-MKI137V1 is designed to evaluate and demonstrate ST’s MotionFX 3-axis digital motion co-processor, which is a sensor hub used for a variety of end-applications such as remote controllers, drones, robots, etc. The device is also used by healthcare companies for accurate tracking of physical movement. Consequently, the evaluation board can be used for testing various permutations and combinations of motion detection systems eventually used for healthcare or consumer applications.

The board also includes a host microcontroller such as STM32L476G-Eval board, an always-on accelerometer/gyroscope, pressure sensor, pressure transducer, Bluetooth, and power supply circuits. Such components provide a comprehensive platform for evaluating/developing motion recognition systems. Moreover the board can be used in laboratories or by developers to precisely calibrate and test motion-driven systems.

Working Principle

The workings of the STEVAL-MKI137V1 can be broken down into two distinct areas/components: calibration and testing. Calibration involves configuring the device’s hardware and software so that it accurately detects motion. Testing involves connecting the device to a host system and running a series of tests to ensure the device is functioning properly.

Calibration of the board is done by connecting it to the STM32L476G-Eval board. Here, parameters such as bias, offset, sensitivity of the motion sensor can be adjusted as per need. Once calibrated, the board can be connected to a host system to start the testing procedure. Several in-built protocols can be used to test the various properties of the motion-sensing system such as the ability to recognize orientation, tilt angles, whether it can differentiate between extended and rest periods, and more.

The testing procedure also employs the use of several powerful software tools that enable developers to quickly debug and gain insight into the working of the motion-sensing system. This process includes data acquisition from the board over SPI/I2C, data visualisation, etc. Testing also includes gathering data such as inclination angles, linear acceleration, rotations, and other motion-based information, which can be used for better control and accuracy.

Conclusion

The STEVAL-MKI137V1 evaluation board can be used for the development and testing of motion-sensing systems. It provides a comprehensive platform for evaluating these systems by offering tools to calibrate, test and gather data which can be used for better accuracy and control. As a result, the board can be used for applications in robotics, drones, healthcare, consumer electronics, etc.

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