Electro-Acoustic Sensor Package Vacuum Cavity for Lower Air Damping
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Solution Overview
Problem
Existing sensor packages face challenges with air resistance affecting the noise performance due to air damping in electro-acoustic sensors, which degrade the signal-to-noise ratio.
Innovation Solution
A sensor package design incorporating a suction structure activated by an electrical connector to create a vacuum environment within the sensor package, reducing air resistance by absorbing air through a getter film or device, and utilizing a processing chip and package cover to form cavities that enhance the suction effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air exists in the electro-acoustic sensor cavity, then the sensor can operate normally, but air damping forms resistance to the vibration of movable parts, increasing noise and degrading signal-to-noise ratio
Solution Approach 1:
The patent applies vacuum environment creation by removing air from the sensor cavity, replacing the air-filled environment with a vacuum or inert atmosphere. This eliminates air damping effects on the movable parts, reducing noise and improving signal-to-noise ratio while maintaining sensor operation
Solution Approach 2:
The patent extracts air from the sensor cavity through vacuum processing, removing the harmful medium (air) that causes damping. The suction structure and vacuum treatment remove air molecules from the cavity, leaving a vacuum environment that eliminates air resistance to vibration
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 design significantly reduces air damping and noise, thereby improving the signal-to-noise ratio and extending the service life of the sensor package by maintaining a vacuum environment.
Implementation Method 1
a suction structure (13); an electrical connector (14) electrically connected to the suction structure (13)
Implementation Method 2
the vibration of the movable parts converts the sound signal and the electric signal through the vibration of the movable parts
Implementation Method 3
When air exists in the electro-acoustic sensor, it forms air damping to the vibration of the movable parts
Data Source
AI summary
The present disclosure provides a linear motor including: a housing body with a containment space; a vibrator assembly suspended in the containment space by an elastic member for vibrating along a vibration direction; a stator assembly fixedly connected to the housing body and having a magnetic axis along the vibration direction; and two magnets located on both sides of the magnetic axis and spaced from the stator assembly, including a first magnet section and a second magnet section located on both sides of the first magnet section. A magnetic field strength of the first magnet section along the magnetic axis is greater than a magnetic field strength of the second magnet section along the magnetic axis. The configuration of the invention can effectively reduce the static attraction force of the magnetic circuit, and increase the overall rigidity of the linear motor.