Sensor ToolBox

These are the virtual sensors that I was previous talking about. These virtual sensors are very powerful but what makes the most notable difference is that these are using the IMU (BMI160).

Calibrated Accelerometer

Virtual Calibrated Accelerometer Sensor based on BMI160.

Calibrated Accelerometer is a virtual sensor that provides calibrated accelerometer data. i.e., Zero-g offsets are removed from the acceleration data.

Accelerometer Calibration method : Accelerometer calibration is done by rotating the device to +/-90 degrees in all axis. It takes some time for the accelerometer to calibrate.

Calibrated Accelerometer data is read in three different units.

• LSB units

• m/(s^2) units

• g units

Calibrated Gyroscope

Virtual Calibrated Gyroscope Sensor based on BMI160.

Calibrated Gyroscope is a virtual sensor that provides calibrated gyroscope data. i.e.,Zero-rate offsets are removed from the angular data.

Gyroscope Calibration method : Gyroscope calibration is done by leaving the device in flat position a few seconds.

Calibrated Gyroscope data is read in three different units.

• LSB units

• rad/sec units

• deg/sec units

Calibrated Magnetometer

Virtual Calibrated Magnetometer Sensor based on BMM150.

Calibrated Magnetometer is a virtual sensor that provides calibrated magnetometer data. i.e., Zero-B offsets are removed from the magnetic field data.

Magnetometer Calibration method : Magnetometer calibration is done by leaving the device in flat position a few seconds, and making a '8' figure motion. '8' figure motion may be done more than once for a proper calibration. Refer the link on how to calibrate: https://www.youtube.com/watch?v=sP3d00Hr14o

Calibrated Magnetometer data is read in three different units.

• LSB units

• micro Tesla units

• gauss units

Fingerprint

Virtual FingerPrint Sensor based on BMM150

Orientation

Orientation Sensor based on BMI160 and BMM150.

In geometry, the orientation of an object (such as a line, plane or rigid body) is part of the description of how it is placed in the space it is in. Orientation sensor is applied to detect direction status of the device in two or three dimensions. Certain methods to describe orientations of a rigid body in three dimensions have been developed. They are as follows :

EULER ANGLES :

To describe an orientation in 3-dimensional Euclidean space, three parameters are required. They can be given in several ways, Euler angles being one of them, which describes the orientation of a frame of reference (typically, a coordinate system or basis) relative to another. They are represented by heading (rotation around the Z-axis), pitch (rotation around the X-axis) and roll (rotation around the Y-axis). Euler Angles can be represented in degrees or in radians.

QUATERNION :

Unit quaternion provides a convenient mathematical notation for representing orientations and rotations of objects in three dimensions. A quaternion represents two things. It has an x, y and z component, which represents the axis about which a rotation will occur. It also has a w component, which represents the amount of rotation which will occur about this axis.

Quaternion is represented by vector Q ( q[0], q[1], q[2], q[3] ) Where in: $q[0] = cos(θ/2) , q[1] = u * sin(θ/2) , q[2] = v * sin(θ/2) , q[3] = w *sin(θ/2)$ ( [u, v, w] is the unit vector parallel to rotation axis. )

Step Counter

Virtual Step Counter Sensor based on BMI160.

Step counter is used to calculate the number of steps by detecting the movement of the user.

Gestures

Virtual Gesture sensor on BMI160.

Gestures is used to detect the tilt, wakeup, glance, pick, flip movement done by the user.

Linear Acceleration

Virtual LinearAcceleration Sensor based on BMI160.

LinearAcceleration is a virtual sensor that provides linear acceleration data. i.e., Zero-g offsets are removed from the acceleration data.

Accelerometer Calibration method : Accelerometer calibration is done by rotating the device to +/-90 degrees in all axis. It takes some time for the accelerometer to calibrate.

LinearAcceleration data is read in three different units.

• LSB units

• m/(s^2) units

• g units

Absolute Humidity

Virtual Absolute Humidity Sensor based on BME280.

Virtual Absolute Humidity Sensor that provides absolute Humidity data. Humidity method : Humidity is calculated by moving the sensor from one place to another place.

Humidity data is read in the following units.

• g/m3 units

Gravity

Virtual Gravity sensor on BMI160.

Gravity is a virtual sensor that provides gravity data. i.e., Zero-g offsets are removed from the acceleration data

Accelerometer Calibration method : Accelerometer calibration is done by rotating the device to +/-90 degrees in all axis. It takes some time for the accelerometer to calibrate.

Gravity data is read in three different units.

• LSB units

• m/(s^2) units

• g units