AK09918C Sensors, Transducers

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The AK09918C, a magnetic sensor by Asahi Kasei Microdevices (AKM), is a fully integrated 3-axis magnetometer. It can detect 6-axis occurrences, including direction of North and inclination value, using magnetic field vector detection. It is highly accurate (<5% error) and reliable. It is suitable for a wide range of applications such as gaming, automotive, aviation, and robotics. In this article, we will discuss the application fields and working principle of the AK09918C.

Application Fields

One of the most popular applications of the AK09918C is in virtual/augmented reality systems. By sensing the device\'s orientation, virtual/augmented reality experiences can be enhanced. The AK09918C can detect orientation in each of the 6 axes, which is ideal for virtual/augmented reality. The AK09918C can also be used in robotics. By detecting the magnetic field in the environment, the robot\'s orientation and trajectory can be determined with high accuracy. This helps with navigation and path planning, ensuring safe and reliable operation for the robot.The AK09918C is also widely used in automotive applications. It can be used to detect direction of travel and estimate angular speed with high accuracy. This is useful for autonomous driving systems, as it can help the vehicle to detect the orientation and movement. Additionally, the AK09918C can also be used in navigation systems, where it can estimate direction of travel and inclination values with high accuracy.

Working Principle

The working principle of the AK09918C is based on the Hall Effect. The Hall Effect is a phenomenon that occurs when a current is passed through a conductor and a magnetic field is applied. The magnetic field will cause electrons in the conductor to move in a direction perpendicular to the applied field. This effect can be used to detect changes in the surrounding magnetic fields. The AK09918C utilizes Hall Effect to detect changes in the earth\'s magnetic field. It utilises two Hall sensors to detect the magnetic field in each of the three axes. When the Earth\'s magnetic field is detected by the sensors, it is converted into a voltage by the sensor. This voltage is then amplified by an internal amplifier and then sent to the ADC for conversion into digital values. The digital values are then passed through an internal algorithm to determine the direction of North. The responses from the three sensors are then combined to calculate the inclination value. This helps to determine the precise orientation of the device.

Conclusion

The AK09918C is a highly accurate and reliable 3-axis magnetometer. It can be used for a wide range of applications, including virtual/augmented reality, robotics, automotive, and navigation. It utilises Hall Effect to detect changes in the earth\'s magnetic field, which is then converted into digital values to calculate the direction of North and inclination value. Overall, the AK09918C is a powerful tool for detecting orientation and motion.

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