Wireless Door Frame Pin Detector Using Internal Battery and Magnetic Sensor
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Solution Overview
Problem
Existing position detectors for pivoting frames, such as windows and doors, are cumbersome and require wired connections, making them difficult to install and adjust, and are limited in detecting non-metallic pawns due to the use of rods and springs that do not fit in the narrow interstice between the opening and the frame.
Innovation Solution
A compact position detector with a case fixed to the frame, a rod with a palpable end and an internal end, and electronic means including a sensor and transmitter powered by a battery arranged along the rod, allowing wireless communication and eliminating the need for wired connections, enabling detection of any type of pawn, including non-metallic ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired position detector with rod and spring is used, then detection capability is provided, but device complexity and installation difficulty increase
Solution Approach 1:
The patent replaces the mechanical rod and spring system with a magnetic field-based detection system. A magnet is integrated into the pawn, and a magnetic sensor detects its position, eliminating the need for mechanical linkages and wired connections, thus reducing device complexity while maintaining detection reliability
Solution Approach 2:
The patent extracts the power supply and electronic components from the traditional wired detector design and integrates them into a self-contained unit. The detector becomes autonomous with an internal battery, removing the need for external wiring and simplifying installation
2Volume of moving object
If a hall effect sensor is used to detect metallic pawn, then compact size is achieved, but ability to detect non-metallic pawn is lost
Solution Approach 1:
The patent creates a universal detection system using magnetic field sensing that can detect both metallic and non-metallic pawns. The magnetic sensor responds to the magnetic field generated by the magnet in the pawn, regardless of the pawn's material composition, thus achieving detection versatility in a compact form factor
3Ease of manufacture
If standard batteries are used in the detector, then cost and ease of replacement are improved, but battery size may interfere with rod movement
Solution Approach 1:
The patent positions the battery in a dimension perpendicular to the rod's movement path, utilizing vertical space within the detector housing rather than horizontal space. This dimensional arrangement allows the battery to be accommodated without interfering with the rod's linear movement, enabling the use of standard-sized batteries
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 provides a simple and efficient installation process, as the detector is autonomous and does not require wired energy supply, allowing for accurate detection of pawn positions without interfering with the frame's movement, and is cost-effective with standard batteries.
Implementation Method 1
A sensor, generating position information according to the position in translation of the rod in relation to the case
Implementation Method 2
at least one battery supplying electronic means and being arranged inside the case, along the rod
Data Source
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AI summary
The invention relates to a detector (12) for detecting the position of a pin of a door frame, comprising a casing (20), a rod (22), which comprises a feeler end (51) extending outside the casing (20) and an internal end (52) extending inside the casing (20), the rod (22) being designed to be translationally moved through the action of the pin on the feeler end (51); and electronic means (24), which comprise a sensor (57, 81), generating position information as a function of the translation position of the rod (22) relative to the casing (20), and a transmitter (82) for transmitting the position information. According to the invention, the electronic means (24) are disposed inside the casing (20) and the detector (12) further comprises a battery (30, 32) powering the electronic means (24) and being disposed inside the casing (20), along the rod (22).