Proximity Sensor Cable Routing to Reduce Detection Surface Collisions
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Solution Overview
Problem
Existing proximity sensors require sufficient space for power supply cables, which can lead to the detection surface being positioned close to the path of detection objects, increasing the risk of damage from collisions.
Innovation Solution
The proximity sensor design includes a head housing that guides the power supply cable in a direction intersecting the normal direction of the detection surface, separating the detection coil from the connecting portion, and uses a shielded power supply cable to reduce interference and improve detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the proximity sensor is positioned closer to the front side to secure space for power supply cable disposal, then the power supply cable disposal space is sufficient, but the detection surface becomes close to the detection object path increasing collision risk
Solution Approach 1:
The power supply cable is guided to extend in a direction intersecting the normal direction of the detection surface (e.g., lateral direction) rather than extending in the normal direction toward the rear side. This dimensional change allows the cable to be routed alongside the head housing rather than behind it, providing sufficient disposal space without pushing the detection surface forward into the detection object path.
2Ease of manufacture
If the detection surface is positioned closer to the front side, then the power supply cable can be disposed behind the structure, but the detection accuracy may be affected by external noise and obstacles
Solution Approach 1:
A connecting portion (guiding structure) is provided on the head housing to guide the power supply cable. This intermediary structure enables easy cable routing along the lateral direction while maintaining the detection surface at an optimal position for accurate detection, free from interference by external noise and obstacles.
3Measurement precision
If a shielded power supply cable is used, then external noise interference is reduced improving detection accuracy, but the device complexity increases
Solution Approach 1:
The power supply cable is changed to a shielded cable, modifying its electrical parameters by adding a shielding layer. This parameter change reduces external noise interference and improves detection accuracy, while the shielding structure is integrated into the cable design to minimize additional device complexity.
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
This design reduces the risk of detection surface failure due to collisions while maintaining a long detection distance and improving detection accuracy by minimizing interference from external noise and obstacles.
Implementation Method 1
The detection coil generates a magnetic field for detection
Implementation Method 2
uses a shielded power supply cable to reduce interference
Data Source
AI summary
The proximity sensor includes a detection coil, a head housing, and a power supply cable. The detection coil generates a magnetic field for detection. The head housing houses the detection coil and has a detection surface. The power supply cable is a cable that is connected to the head housing to supply power to the detection coil. The head housing has a connecting portion that guides the power supply cable in a direction intersecting a normal direction of the detection surface to an opposite side of a detection surface in the normal direction. The detection coil is disposed at a position separated from the connecting portion in the normal direction.