All-Directional Fall Sensor with Liquid Floater
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Solution Overview
Problem
Existing fall sensors for electronic products are inadequate in detecting falls or impacts from multiple directions, making it difficult to determine if a product has been damaged during transport or use, which can lead to unclear responsibility between consumers and manufacturers.
Innovation Solution
An all-directional fall sensor is developed, comprising a hollow casing filled with liquid and a floater with indicative materials, where the center of gravity of the floater is aligned parallel to the magnetic force, allowing the sensor to detect changes in magnetic force, acceleration, and inertia to determine if a fall has occurred, using a chamber with sealing members that dislocate upon impact, dispersing indicative materials for visual confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional single-direction sensors are used, then the device complexity is low, but the measurement precision for detecting falls from multiple directions is insufficient
Solution Approach 1:
The sensor is divided into three perpendicular detection units (first, second, and third detection units), each sensitive to acceleration in a specific direction. This segmentation allows the sensor to detect falls from any direction by combining signals from multiple independent detection elements, thereby improving measurement precision without requiring a single complex omnidirectional sensor.
Solution Approach 2:
The patent transitions from single-direction (1D) detection to three-dimensional (3D) detection by arranging detection units along three perpendicular axes (x, y, z directions). This dimensional expansion enables the sensor to capture acceleration vectors from any spatial direction, significantly improving fall detection accuracy while maintaining relatively simple individual sensor structures.
2Reliability
If multiple sensors are added to detect all directions, then the fall detection accuracy improves, but the device complexity increases
Solution Approach 1:
Multiple detection units are integrated into a single unified sensor structure where the first, second, and third detection units are arranged in fixed spatial relationships within one device housing. This merging approach achieves reliable multi-directional detection while avoiding the complexity of coordinating multiple separate sensor systems, as the integrated structure provides a unified signal processing architecture.
Solution Approach 2:
Each detection unit is designed to detect acceleration along its specific axis, and collectively the three units provide universal coverage for detecting falls from any direction. This multi-functional arrangement allows a single sensor system to perform multiple detection functions (detecting falls along x, y, and z axes) thereby improving reliability without proportionally increasing system complexity.
3Measurement precision
If a magnetic field sensor is used, then the sensor can detect magnetic force changes, but it cannot detect falls from all directions simultaneously
Solution Approach 1:
The patent introduces acceleration sensors as intermediary detection elements that detect mechanical acceleration caused by falls. These acceleration sensors convert mechanical impact into electrical signals that can be processed to determine fall direction. This intermediary approach allows the system to detect falls from any direction through acceleration measurement rather than relying on magnetic field directionality, thereby improving adaptability while maintaining detection precision.
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 sensor effectively determines if an electronic product has experienced a fall by scattering indicative materials within the chamber, clearly indicating external forces or falls, thus distinguishing responsibility between consumers and manufacturers.
Implementation Method 1
a floater buoyed by the liquid inside the first casing
Implementation Method 2
The indicative materials are dispersed inside the indicator in case of the all-directional fall sensor being applied with an impact force
Data Source
AI summary
The all-directional fall sensor of the present invention includes a first casing defining a first interior space filled with a liquid and a floater buoyed by the liquid inside the first casing. The floater includes an indicator having indicative materials therein. The indicator includes a body defining a chamber, which is divided into at least a first portion and a second portion with a first sealing member located therebetween. The indicative materials are contained in the second portion of the chamber and are sealed therein with the first sealing member. When the all-directional fall sensor is applied with a force, the first sealing member would be dislocated and thus the indicative materials are dispersed within the chamber.