Safety Harness Hook Detection Using Magnetic Field Sensing
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Solution Overview
Problem
Existing safety harness systems complicate the configuration of the hook and safety rope by requiring electrical components for detecting hook attachment to a main rope, leading to durability issues.
Innovation Solution
A system that determines hook usage by detecting attachment to a hook holder using a magnet or current detection, with a sensor and warning mechanism, and defines a high-place work area using an AC induced magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coil and electric signal cable are incorporated into the hook and safety rope to detect hook attachment, then the hooking state can be detected, but the configurations of the hook and safety rope become complicated
Solution Approach 1:
The detection function is extracted from the hook and safety rope structure. Instead of embedding coils and cables within these components, the invention uses a separate detection device with a sensor that detects the presence or absence of the hook through magnetic field detection, thereby maintaining the simplicity of the original hook and safety rope configurations while achieving reliable detection
Solution Approach 2:
The invention replaces the mechanical/electrical detection system (coils and cables) with a magnetic field-based detection system. A sensor detects the magnetic field generated by the hook, eliminating the need for physical electrical connections and simplifying the overall system structure
2Reliability
If a coil and electric signal cable are incorporated into the hook and safety rope, then the hooking state can be detected, but the durability deteriorates
Solution Approach 1:
The detection functionality is extracted as a separate component rather than being integrated into the hook and safety rope. This separation eliminates the need to modify these critical safety components with electrical elements, preserving their original durability and reliability
Solution Approach 2:
The detection device uses a simple sensor that detects magnetic fields without requiring durable electrical connections. This approach accepts that the detection device may be simpler and potentially replaceable, while the critical hook and safety rope components maintain their original durable construction
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
Ensures correct hook usage without complicating the hook and safety rope configuration, providing reliable warnings within designated work areas.
Implementation Method 1
a magnet mounted to the hook; and a sensor installed adjacent to the hook holder to serve as means to detect a magnetism of the magnet
Implementation Method 2
means to define a high-place work area is configured to define the high-place work area by an AC induced magnetic field
Data Source
AI summary
Provided is a new technique capable of determining whether or not a hook of a safety harness is used correctly, without causing complexity in the configurations of the hook and a safety rope. Specifically, provided is a system for confirming a hooking state of a safety harness, wherein a safety harness 10 comprises: a belt 11 to be worn on a body of a worker; a safety rope 12 connected to the belt 11; a hook 13 attached to a distal end of the safety rope 12; and a hook holder 14 for allowing the hook 13 to be attached to the belt 11 therethrough. The system is operable to detect whether or not the hook 13 is attached to the hook holder 14, and issue a warning when it is detected that the hook 13 is attached to the hook holder 14.