Description

MPU6050 sensor module is complete 6-axis Motion Tracking Device. It combines 3-axis Gyroscope, 3-axis Accelerometer and Digital Motion Processor all in small package. Also, it has additional feature of on-chip Temperature sensor. It has I2C bus interface to communicate with the microcontrollers.

It has Auxiliary I2C bus to communicate with other sensor devices like 3-axis Magnetometer, Pressure sensor etc.

If 3-axis Magnetometer is connected to auxiliary I2C bus, then MPU6050 can provide complete 9-axis Motion Fusion output.

Let’s see MPU6050 inside sensors.

3-Axis Gyroscope

The MPU6050 consist of 3-axis Gyroscope with Micro Electro Mechanical System(MEMS) technology. It is used to detect rotational velocity along the X, Y, Z axes as shown in below figure.

–  When the gyros are rotated about any of the sense axes, the Coriolis Effect causes a vibration that is detected by a MEM inside MPU6050.

– The resulting signal is amplified, demodulated, and filtered to produce a voltage that is proportional to the angular rate.

–  This voltage is digitized using 16-bit ADC to sample each axis.

–  The full-scale range of output are +/- 250, +/- 500, +/- 1000, +/- 2000.

–  It measures the angular velocity along each axis in degree per second unit.

3-Axis Accelerometer

The MPU6050 consist 3-axis Accelerometer with Micro Electro Mechanical (MEMs) technology. It used to detect angle of tilt or inclination along the X, Y and Z axes as shown in below figure.

–  Acceleration along the axes deflects the movable mass.

–  This displacement of moving plate (mass) unbalances the differential capacitor which results in sensor output. Output amplitude is proportional to acceleration.

–  16-bit ADC is used to get digitized output.

–  The full-scale range of acceleration are +/- 2g, +/- 4g, +/- 8g, +/- 16g.

–  It measured in g (gravity force) unit.

–  When device placed on flat surface it will measure 0g on X and Y axis and +1g on Z axis.

DMP (Digital Motion Processor)

The embedded Digital Motion Processor (DMP) is used to compute motion processing algorithms. It takes data from gyroscope, accelerometer and additional 3rd party sensor such as magnetometer and processes the data. It provides motion data like roll, pitch, yaw angles, landscape and portrait sense etc. It minimizes the processes of host in computing motion data. The resulting data can be read from DMP registers.

On-chip Temperature Sensor

On-chip temperature sensor output is digitized using ADC. The reading from temperature sensor can be read from sensor data register.

MPU-6050 Module