Linear Vibration Motor Voltage Control for Collision Noise Prevention
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Solution Overview
Problem
Linear vibration motors suffer from limited space for vibrator movement, leading to potential collisions with device walls at high driving voltages, causing abnormal noise and reducing performance and reliability, resulting in a shortened service life.
Innovation Solution
A dynamic protection method that adjusts voltage parameters by calculating and processing signal frames using a dynamic protection algorithm, analyzing acceleration signals through time- and frequency-domain processes to determine normal or abnormal states, and adjusting gain coefficients to reduce noise and prolong device life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a high driving voltage is applied to increase the output force of the linear vibration motor, then the driving capability is improved, but the vibrator may collide with the inner wall causing abnormal noise and reducing reliability
Solution Approach 1:
The patent implements a feedback mechanism by detecting acceleration signals from the vibrator and analyzing them to determine if abnormal collisions are occurring. Based on this feedback, the system dynamically adjusts the driving voltage to prevent collisions, thus maintaining reliability while allowing high voltage operation for improved output force.
Solution Approach 2:
The patent applies dynamic adjustment of the driving voltage based on real-time vibration detection. Instead of using a fixed high voltage, the system dynamically modulates the voltage level according to the detected vibration state, allowing the motor to operate at high power when safe and reduce voltage when collision risk is detected, thereby resolving the contradiction between force output and reliability.
2Power
If the driving voltage is increased to improve motor performance, then the output capability is enhanced, but the service life of the motor is shortened due to vibrator collision
Solution Approach 1:
The system continuously monitors vibration acceleration and uses this feedback to adjust driving voltage in real-time, preventing collision damage that would reduce service life while maintaining high power output capability when conditions permit.
Solution Approach 2:
The system performs preliminary detection of vibration states before collision occurs and takes preventive action by adjusting the driving voltage to avoid the collision, thereby extending service life while preserving output capability.
3Power
If the driving voltage is excessively high, then the motor produces stronger vibration output, but abnormal noise is generated due to vibrator collision with the inner wall
Solution Approach 1:
The system detects acceleration signals that indicate abnormal vibration patterns preceding collision and noise generation. By using this feedback to dynamically reduce the driving voltage when collision risk is detected, the system eliminates abnormal noise while maintaining strong vibration output during normal operation.
Solution Approach 2:
The driving voltage is dynamically adjusted based on real-time vibration detection, allowing the motor to operate at high power for strong vibration output when safe, and automatically reducing voltage to prevent collision-induced abnormal noise.
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
The method automatically adjusts voltage parameters to reduce abnormal noise and improve performance and reliability, thereby extending the service life of the linear vibration motor.
Implementation Method 1
S4: collecting an acceleration signal of the linear vibration motor
Implementation Method 2
S2: processing the original voltage signal of each frame to acquire a current gain coefficient of a current signal frame, and obtaining a driving voltage signal through a dynamic protection algorithm
Data Source
AI summary
Provided is a dynamic protection method and system for a linear vibration motor. The method includes S1: calculating original voltage signal according to initial gain coefficient; S2: processing the original voltage signal of each frame, and obtaining driving voltage signal; S3: loading the driving voltage signal to the linear vibration motor to drive the linear vibration motor to operate; S4: collecting acceleration signal of the linear vibration motor, and analyzing whether the acceleration signal is abnormal to determine operating state of the linear vibration motor; if yes, performing S5; and if not, performing S6; S5: adjusting current gain coefficient of current signal frame to new gain coefficient; and S6: determining whether the current signal frame is the last signal frame. With this method, voltage parameter can be automatically adjusted for the linear vibration motor to reduce abnormal noise to prolong the service life of the device.