Gas supply tap with position sensor
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Solution Overview
Problem
Existing gas supply taps lack precise detection systems for the position of the control knob and operating stem, which are integral with each other, hindering advanced functionalities such as precise gas control and safety features.
Innovation Solution
A gas supply tap with a diametrically magnetized magnet integrated with the operating stem and a magnetic field sensor to detect both axial and rotational movements, allowing precise detection of the stem's position, which is then used to control various functions like ignition, re-ignition, and visual signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gas supply tap uses conventional detection devices to detect the position of the operating stem, then basic functions can be carried out, but precise detection of both axial and rotational positions is not achieved
Solution Approach 1:
The patent replaces complex mechanical detection devices with a magnetic field-based detection system. A magnet is integrated with the operating stem, and a magnetic field sensor detects its position, eliminating the need for complex mechanical encoders while achieving precise detection of both axial and rotational positions.
Solution Approach 2:
The magnetic field sensor serves multiple functions: detecting axial position, detecting rotational position, and providing this information to the control unit for various functions (ignition, re-ignition, visual signaling). This single sensor replaces what would traditionally require multiple separate detection mechanisms.
2Measurement precision
If multiple detection devices are used to detect both axial and rotational positions, then precise position information is obtained, but the device complexity increases
Solution Approach 1:
The magnetic field sensor is designed to simultaneously detect both axial and rotational positions of the operating stem through a single device. The sensor's ability to measure magnetic field variations in multiple dimensions allows it to provide comprehensive position information without requiring separate detection mechanisms for each degree of freedom.
Solution Approach 2:
The patent merges the functions of multiple detection devices into a single magnetic field sensor. By integrating axial and rotational detection capabilities into one sensor unit, the system reduces component count while maintaining precise detection of both position parameters.
3Device complexity
If a simple tap without valve is used, then the structure is simpler, but safety functions such as timed shutdown and child safety cannot be implemented
Solution Approach 1:
The patent replaces mechanical valve mechanisms with an electronically controlled system. The magnetic field sensor provides precise position information to a control unit, which can implement safety functions (timed shutdown, child safety) through electronic control of the gas supply, eliminating the need for complex mechanical safety valves while enhancing functionality.
Solution Approach 2:
The system uses changes in magnetic field parameters to detect stem position and translates these into electronic control signals. By changing from mechanical parameter control to electronic parameter control based on magnetic field detection, the system achieves both simplicity and enhanced safety functionality.
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
Enables precise detection of the stem's position for accurate gas control and safety features, including automatic re-ignition and visual feedback, enhancing user interaction and safety.
Implementation Method 1
A control system for gas appliances in which a gas tap has an activating stem with a control knob for controlling the supply of the gas. The control system of US 2019/271466 A1 comprises a detecting device for detecting the angular position of the control knob, having a magnetic element fixed to the control knob and a magnetic field sensor (Hall-effect sensor) fixed to the body of the tap for detecting the angular position of the magnetic element.
Data Source
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AI summary
It is disclosed a gas supply tap (1) comprising a control knob (2) connected to an operating stem (3) adapted to operate a valve or a shutter (4) for opening and closing the tap (1), comprising a detecting device (5, 6) to detect the position of said knob (2), at least one component (5) of said detecting device (5, 6) being translationally and rotationally integral with said operating stem (3).