Accelerometer tilt error correction

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SUMMARY

The discussion focuses on correcting tilt errors in acceleration measurements using the MMA7341 accelerometer mounted on an oscillating metal table. It is established that a tilt angle (Q) affects the accuracy of acceleration readings in the x direction. To correct this error without physically adjusting the sensor, one must mathematically rotate the accelerometer's frame to align with the gravity frame by measuring the x-z and y-z tilt angles.

PREREQUISITES
  • Understanding of accelerometer principles, specifically MMA7341 functionality
  • Basic knowledge of trigonometry for angle calculations
  • Familiarity with Arduino programming for sensor integration
  • Concept of coordinate transformation in 3D space
NEXT STEPS
  • Research mathematical rotation techniques for sensor data correction
  • Learn how to implement angle measurements using Arduino
  • Explore sensor fusion algorithms for improved accuracy
  • Study the effects of tilt on accelerometer readings in various applications
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Electronics enthusiasts, Arduino developers, and engineers working on motion detection and sensor calibration projects.

maheshcn
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I am using arduino and accelerometer MMA7341 to measure the acceleration in x direction of an oscillating metal table. But the mounting of the accelerometer is tilted by a small angle (say Q) . Is it affect the acceleration?. If it is affect the acceleration in x direction , how can correct it without changing the tilt of the acceleration sensor.
 
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You will have to mathematically rotate the accelerometer's frame to the gravity frame. You will have to measure the x-z and y-z angles that it is tilted by.
 

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