Magnetic Line Sensor Capacitor Layout for Vibration Noise Reduction
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Solution Overview
Problem
Conventional multi-channel magnetic line sensors face limitations in resolution due to the number of magnetic sensor elements, leading to noise issues from vibrations transmitted through the substrate, which are costly to mitigate.
Innovation Solution
A magnetic line sensor with multiple magnetic sensor elements arranged in the main scanning direction, each connected to chip ceramic capacitors with external electrodes aligned orthogonally to the scanning direction, reducing noise by minimizing substrate vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple magnetic sensor elements are arranged in the main scanning direction to improve resolution, then measurement precision is improved, but noise from substrate vibrations increases
Solution Approach 1:
The patent applies local quality by orienting the external electrodes of chip ceramic capacitors in a specific direction (orthogonal to the main scanning direction) to create directional noise suppression. This localized orientation strategy targets the specific vibration problem without requiring complete system redesign, allowing the magnetic sensor elements to maintain high resolution while selected capacitors provide targeted noise filtering in the critical scanning direction.
2Ease of manufacture
If conventional capacitor arrangements are used, then ease of manufacture is maintained, but noise suppression effectiveness is insufficient
Solution Approach 1:
The patent changes the orientation parameter of the capacitor external electrodes from conventional arrangements to a specific directional alignment orthogonal to the main scanning direction. This parameter change transforms the capacitors from generic noise filtering components into directional vibration suppressors, maintaining ease of manufacture through standard mounting techniques while achieving superior noise suppression by exploiting the anisotropic vibration characteristics of the substrate.
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
Effectively suppresses noise from external vibrations at a lower cost by altering the capacitor arrangement, enhancing resolution without additional expensive noise suppression measures.
Implementation Method 1
at least one of the chip ceramic capacitors having its pair of external electrodes aligned in a direction orthogonal to the main scanning direction
Data Source
AI summary
Provided is a magnetic line sensor that is in a multi-channel system and detects magnetic information of a transported sheet. The magnetic line sensor includes multiple magnetic sensor elements each provided for a corresponding channel and arranged in a main scanning direction, multiple chip ceramic capacitors each electrically connected to a corresponding one of the multiple magnetic sensor elements and each having a pair of external electrodes, and a substrate on which the chip ceramic capacitors are mounted. At least one of the chip ceramic capacitors has its pair of external electrodes aligned in a direction orthogonal to the main scanning direction.