Multi-directional Water Sensor with Peripheral Conductive Pads
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Solution Overview
Problem
Conventional water sensors are limited in their ability to detect water from any direction, restricting their placement and effectiveness in various orientations and locations.
Innovation Solution
A multi-directional water sensor design featuring multiple conductive pads arranged around a housing, with a biasing circuit that monitors resistance between pad groupings to detect a thin layer of surface water, activating a buzzer only when connection is made, allowing for reliable water detection regardless of orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional water sensors are used with two spaced conductive pads, then the sensor can detect water contact, but the sensor is limited in detection capability from any direction and has restricted placement flexibility
Solution Approach 1:
The sensor divides the detection function into multiple independent conductive pads (at least three pads) arranged around the housing perimeter. Each pad can independently detect water contact from different directions, allowing the sensor to detect water from any orientation while maintaining a relatively simple overall structure.
Solution Approach 2:
The conductive pads are arranged in a circular pattern around the housing perimeter rather than linearly, adding spatial distribution in multiple directions. This dimensional arrangement enables the sensor to detect water contact from any direction (360-degree coverage) while keeping each individual pad simple in structure.
2Adaptability or versatility
If multiple conductive pads are arranged around the housing to enable multi-directional detection, then placement flexibility is improved, but device complexity increases
Solution Approach 1:
The housing serves multiple functions: it provides structural support, defines the sensor orientation, and its perimeter arrangement of conductive pads enables universal detection capability in all directions. This multi-functionality reduces the need for additional components that would increase complexity.
Solution Approach 2:
Each conductive pad is positioned at a specific location around the perimeter to optimize detection from particular directions. The local positioning of pads provides targeted detection capability while the overall circular arrangement ensures comprehensive coverage, balancing complexity with effectiveness.
3Reliability
If the biasing circuit continuously monitors resistance between pad groupings, then water detection reliability is improved, but power consumption increases
Solution Approach 1:
The biasing circuit employs periodic or triggered monitoring of resistance between pad groupings rather than continuous monitoring. The circuit activates detection functions based on detected conditions (such as motion or potential water contact indicators), maintaining reliability by monitoring when needed while conserving power by not continuously consuming energy.
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 reliable water detection in diverse orientations and locations, reducing power consumption when no water is present and enhancing alarm sound amplification, thus improving placement flexibility and operational efficiency.
Implementation Method 1
Water sensors or sensors are used to detect water leaks by sensing the presence of water in contact with two spaced conductive pads. If water comes into contact with both conductive pads, an audible alarm is sounded
Implementation Method 2
a buzzer located inside the housing and coupled to the electrical power source. The buzzer is configured to generate a sound in response to the first grouping being electrically connected to the second grouping via the thin layer of surface water
Data Source
AI summary
A multi-directional water sensor comprises a housing having multiple conductive pads on the outer surface of the housing at locations spaced around the periphery of the housing, an electrical power source located inside the housing, a buzzer located inside the housing, and multiple electrical conductors located inside the housing and connecting multiple pairs of the contacts so that electrical current can flow between different pairs of the contacts when they are connected by water. The buzzer produces a sound when electrical current flows between any pair of the contacts.