17489190. PEDESTRIAN SENSOR ACCURACY WITH MINIMAL DEPENDENCE ON MAGNETOMETER simplified abstract (QUALCOMM Incorporated)

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PEDESTRIAN SENSOR ACCURACY WITH MINIMAL DEPENDENCE ON MAGNETOMETER

Organization Name

QUALCOMM Incorporated

Inventor(s)

William Morrison of San Francisco CA (US)

Hsiao Chien Liang of San Jose CA (US)

Gautam Nirula of San Jose CA (US)

Himanshu Shah of Milpitas CA (US)

PEDESTRIAN SENSOR ACCURACY WITH MINIMAL DEPENDENCE ON MAGNETOMETER - A simplified explanation of the abstract

This abstract first appeared for US patent application 17489190 titled 'PEDESTRIAN SENSOR ACCURACY WITH MINIMAL DEPENDENCE ON MAGNETOMETER

Simplified Explanation

The patent application describes a method for calibrating a gyroscope in an electronic device without using a magnetometer or relying on data from a magnetometer. Here are the key points:

  • The apparatus estimates gyroscopic biases for different temperatures and creates a mapping between temperatures and biases.
  • It monitors the temperature of the gyroscope using a gyroscope temperature sensor.
  • When the gyroscope changes temperature, the apparatus calibrates it based on the mapping or a predicted value derived from the mapping.
  • The apparatus calculates a Dead Reckoning (DR) trajectory using the calibrated gyroscope and accelerometer, without using a magnetometer or its data.

Potential Applications

  • This technology can be used in various electronic devices that rely on gyroscopes for motion sensing, such as smartphones, tablets, gaming consoles, and virtual reality headsets.
  • It can improve the accuracy and reliability of motion tracking in these devices, enhancing user experience in applications like gaming, augmented reality, and virtual reality.

Problems Solved

  • Traditional gyroscope calibration methods require the use of a magnetometer or its data, which may not always be available or reliable.
  • This innovation solves the problem of gyroscope calibration in situations where a magnetometer is not present or its data is not accurate, ensuring accurate motion sensing in electronic devices.

Benefits

  • By eliminating the need for a magnetometer or its data, the apparatus simplifies the calibration process for gyroscopes.
  • It reduces the reliance on external sensors, making the calibration more robust and independent of external factors.
  • The calibrated gyroscope, along with the accelerometer, can provide accurate motion tracking for various applications, improving user experience and enabling new possibilities in electronic devices.


Original Abstract Submitted

Aspects presented herein may enable an electronic device to determine gyroscope biases and calibrate a gyroscope without a magnetometer or without relying on data generated from a magnetometer. In one aspect, an apparatus estimates a set of gyroscopic biases for a plurality of temperatures or temperature ranges to create a mapping that maps the plurality of temperatures or temperature ranges to the set of gyroscopic biases. The apparatus monitors temperatures of a gyroscope via a gyroscope temperature sensor. The apparatus calibrates the gyroscope in response to the gyroscope changing from a first temperature to a second temperature based on the mapping or based on a predicted value derived from the mapping. In some aspects, the apparatus calculates a DR trajectory of the apparatus based at least in part on the calibrated gyroscope and the accelerometer without using a magnetometer or without using data generated from the magnetometer.

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