Non-wearable Fall Detection via Surface Vibration and Thermal Sensing
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Solution Overview
Problem
Current fall detection systems for senior adults are often inconvenient, costly, and raise privacy concerns, with many requiring wearable devices and relying on high-quality training data or being inaccurate in certain scenarios.
Innovation Solution
A non-wearable fall detection system using a device with a base, vibration sensor, motion sensor, heat sensor, and processing unit that detects falls by analyzing surface vibrations, human motion, and body temperature without the need for training data, and can distinguish between falls and other events like sitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wearable devices are used for fall detection, then detection accuracy is improved, but user convenience and acceptance deteriorate
Solution Approach 1:
The patent extracts the fall detection functionality from wearable devices and relocates it to a fixed base unit. The sensor array (accelerometers, gyroscopes, microphones) is embedded in the environment rather than on the user, eliminating the need for wearable components while maintaining detection capability through environmental monitoring of motion and acoustic signatures.
Solution Approach 2:
The patent introduces an intermediary processing system that analyzes multiple sensor inputs (vibration, audio, motion) from the environment to infer fall events. This mediator translates environmental signals into fall detection decisions, replacing the direct wearable-sensor connection with an indirect environmental monitoring approach.
2Measurement precision
If advanced sensors like depth cameras and radar are used, then fall detection capability is improved, but system cost increases
Solution Approach 1:
The patent merges multiple low-cost sensor types (accelerometers, gyroscopes, microphones, vibration sensors) into a unified detection system. By combining these inexpensive components in a coordinated array, the system achieves comprehensive fall detection capability without requiring expensive specialized sensors like depth cameras or radar.
Solution Approach 2:
The patent makes each sensor serve multiple functions: the vibration sensor detects both floor vibrations from falls and ambient environmental vibrations; the microphone captures both acoustic signatures of falls and ambient sounds; the accelerometer/gyroscope monitor both user motion and environmental motion. This multi-functionality reduces the need for specialized expensive sensors.
3Object-affected harmful factors
If environmental sensors are used instead of wearables, then privacy concerns are reduced, but detection accuracy in certain scenarios deteriorates
Solution Approach 1:
The patent segments the detection function across multiple independent sensors distributed in the environment rather than using a single comprehensive camera system. Each sensor (vibration sensor, microphone, accelerometer) captures localized data, and the system integrates these segmented inputs to reconstruct fall detection capability while maintaining privacy through distributed, low-resolution sensing.
Solution Approach 2:
The patent creates a composite sensing approach by combining data from heterogeneous sensor types (vibration, acoustic, motion) to achieve robust fall detection. This composite methodology compensates for the limitations of individual environmental sensors, maintaining detection accuracy across various scenarios while preserving privacy through non-visual sensing modalities.
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 system achieves high accuracy in detecting falls with minimal false alarms and is cost-effective, addressing privacy concerns by not requiring wearable components and eliminating the need for extensive training data.
Implementation Method 1
a vibration sensor configured to detect vibrations of the surface
Implementation Method 2
a motion sensor including a receiver configured to received transmissions from one or more radio frequency transmitters
Implementation Method 3
a heat sensor including a thermal camera, wherein the thermal camera comprises a plurality of pixels
Data Source
AI summary
Provided herein are systems and devices capable of detecting an event, such as the fall of a human. The devices may include a motion sensor, a heat sensor, and a vibration sensor. The devices and systems also may include an alarm and/or communication device configured to function when the event occurs.