Magnetometer Protection on PCB Edge
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Solution Overview
Problem
Magnetometers in electronic devices are prone to damage during assembly and are sensitive to magnetic interference when placed near the edge of a printed circuit board, leading to reduced sensitivity and increased risk of damage.
Innovation Solution
A protection apparatus with a semi-enclosed or fully-enclosed structure made of non-magnetizable materials is mounted on the printed circuit board periphery around the magnetometer, reducing the risk of damage and magnetic interference, allowing the magnetometer to be placed closer to the edge of the PCB without compromising sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the magnetometer is placed at a location that is relatively close to an edge of the PCB substrate, then the circuit layout space is reduced, but the magnetometer is easily damaged during assembly and carrying
Solution Approach 1:
A protection apparatus is provided on the PCB substrate before the magnetometer is subjected to assembly or carrying processes. This protection apparatus acts as a cushioning structure that prevents direct impact or damage to the magnetometer during handling, assembly, or transportation, thereby resolving the contradiction between placing the magnetometer close to the edge for space efficiency and protecting it from damage.
2Reliability
If the magnetometer is placed at a location that is relatively distant from the edge of the PCB substrate, then the magnetometer is protected from damage, but the magnetometer is easily interfered with by magnetic devices on the PCB substrate
Solution Approach 1:
A protection apparatus is introduced as an intermediary structure between the magnetometer and the PCB substrate. This protection apparatus is made of non-magnetic material that does not interfere with the magnetic field, allowing the magnetometer to be placed close to the edge while maintaining both physical protection and measurement precision. The intermediary structure shields the magnetometer from mechanical damage without affecting its sensitivity to magnetic fields.
3Productivity
If high-current devices such as capacitor and inductor are arranged around the magnetometer to utilize space, then the circuit layout efficiency is improved, but magnetic field interference to the magnetometer increases
Solution Approach 1:
High-current devices such as capacitors and inductors are extracted from the immediate vicinity of the magnetometer and relocated to other areas of the PCB substrate. This separation removes the source of magnetic field interference from close proximity to the magnetometer, allowing efficient circuit layout while maintaining magnetometer sensitivity. The protection apparatus enables this spatial reorganization by providing local protection where the magnetometer is positioned.
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 solution effectively protects the magnetometer from damage during assembly and minimizes magnetic interference, improving sensitivity while reducing circuit layout space and maintaining low costs.
Implementation Method 1
A protection apparatus with a semi-enclosed or fully-enclosed structure made of non-magnetizable materials is mounted on the printed circuit board periphery around the magnetometer
Data Source
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AI summary
An electronic device , the electronic device includes: a printed circuit board PCB substrate (201, 31); a magnetometer (202, 32), where the magnetometer (202, 32) is mounted on the PCB substrate (201, 31); and a protection apparatus (203, 33), where the protection apparatus (203, 33) is mounted on the PCB substrate (201, 31) and is disposed at a periphery of the magnetometer (202, 32), and is configured to protect the magnetometer (202, 32). According to the electronic device, sensitivity of the magnetometer (202, 32) can be improved, and the magnetometer (202, 32) can be protected from being damaged.