What is a nine-axis sensor? How does it work? -- Multi-axis sensor

2020-11-06

Actually, the gyroscope in our mobile phones and other electronic products doesn't look like that. Like the accelerometer, it's a microelectronic component. It utilizes the Coriolis effect; the movement offset of a continuously vibrating oscillator in a rotating system changes the circuit state, causing changes in related electrical parameters. This allows it to reflect movements such as tilting left and right, tilting forward and backward, and swaying left and right.

What is the Coriolis effect? Imagine an athlete at point O (O remains stationary) in the center of a counter-clockwise rotating disk. If they throw a basketball to another athlete standing at point A on the edge, along a straight line OA, the athlete at A will find that the basketball deflects to the right, ultimately landing at point A'. Using the rotating disk as a reference frame, the basketball appears to be subjected to a force to the right, causing the deflection. This force is called the Coriolis effect.

As an integrated sensor module, the nine-axis sensor reduces the size of the circuit board and overall space, making it more suitable for lightweight and portable electronic devices and wearable products. The accuracy of the data from the integrated sensor depends not only on the precision of the device itself but also on the calibration after welding and assembly, and on the supporting algorithms for different applications. Appropriate algorithms can fuse data from multiple sensors, compensating for the shortcomings of individual sensors in accurately calculating position and orientation, thus achieving high-precision motion detection.