Speaker IMU Calibration for External Force Rotation Drift
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Solution Overview
Problem
Smart speakers experience reduced rotation control accuracy due to external force interference, leading to inaccurate voice recognition and impaired human-computer interaction.
Innovation Solution
A calibration control method that utilizes IMU data to detect external force interference, performs attitude and position checks, and executes rotation calibration operations on the IMU module when inclination or displacement thresholds are exceeded, ensuring accurate rotation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the smart speaker is equipped with rotation function to follow the user, then the voice recognition rate is improved, but the rotation control accuracy is reduced due to external force interference
Solution Approach 1:
The system performs preliminary calibration of the IMU module to establish a reference attitude inclination before normal operation. When external forces act on the speaker, the pre-calibrated reference values enable the system to detect and correct rotation deviations, maintaining accurate rotation control despite the mobility required for voice recognition
Solution Approach 2:
The system continuously monitors the speaker's rotation state using the IMU module and compares current attitude inclination against reference values. When deviations exceeding a threshold are detected, the system triggers recalibration to correct the rotation accuracy, creating a closed-loop feedback mechanism that maintains reliability during dynamic operation
2Adaptability or versatility
If the speaker rotates to follow the user position, then the human-computer interaction is improved, but the rotation control accuracy decreases when subject to external forces
Solution Approach 1:
The system performs preliminary calibration of the IMU module to establish a reference attitude inclination before normal operation. When external forces act on the speaker, the pre-calibrated reference values enable the system to detect and correct rotation deviations, maintaining accurate rotation control despite the mobility required for voice recognition
Solution Approach 2:
The system continuously monitors the speaker's rotation state using the IMU module and compares current attitude inclination against reference values. When deviations exceeding a threshold are detected, the system triggers recalibration to correct the rotation accuracy, creating a closed-loop feedback mechanism that maintains reliability during dynamic operation
3Measurement precision
If the IMU module is recalibrated frequently to maintain accuracy, then the rotation control precision is improved, but the system complexity increases
Solution Approach 1:
The system changes the calibration trigger parameter from continuous or frequent calibration to event-driven calibration based on detected external forces. By monitoring threshold parameters such as acceleration magnitude and rotation deviation, the system performs calibration only when necessary, maintaining precision while avoiding the complexity of continuous calibration mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Maintains IMU module accuracy by recalibrating when external force interference occurs, improving rotation control and voice recognition rates in smart speakers.
Implementation Method 1
obtaining real-time inertial measurement unit (IMU) data of the speaker, and determining whether the speaker is subject to an external force interference according to the real-time IMU data
Data Source
AI summary
Disclosed are a calibration control method for a speaker, an apparatus, a device, and a readable storage medium. The calibration control method for the speaker includes: obtaining real-time inertial measurement unit (IMU) data of the speaker, and determining whether the speaker is subject to an external force interference according to the real-time IMU data; in response to determining that the speaker is subject to the external force interference, detecting a current attitude inclination of the speaker when the external force interference is eliminated, and comparing the current attitude inclination with a pre-stored reference attitude inclination to obtain an inclination change value; and in response to the inclination change value being greater than a preset inclination threshold, performing a rotation calibration operation on the IMU module in the speaker.