Mattress Pressure Sensing for Privacy-Preserving Sleep Posture Recognition
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Solution Overview
Problem
Existing methods for recognizing sleeping posture at night using cameras are hindered by blanket coverage and violate user privacy.
Innovation Solution
A sleeping posture recognition method and system using a pressure sensor array on a mattress to obtain body pressure data, which is processed through a deep neural network to improve recognition accuracy without invading privacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera is used to obtain sleeping posture photos, then sleeping posture recognition is possible, but user privacy is violated and recognition fails when users are covered with blankets
Solution Approach 1:
The patent replaces the optical measurement system (camera) with a mechanical sensing system (pressure sensor array). The pressure sensors embedded in the mattress detect body pressure distribution to determine sleeping posture, eliminating the need for visual capture and thus preserving user privacy while maintaining recognition accuracy.
Solution Approach 2:
The patent introduces a pressure sensor array as an intermediary between the user's body and the recognition system. Instead of directly capturing images of the user, the sensors measure pressure distribution through the mattress, providing indirect but sufficient information for posture recognition without invading privacy.
2Measurement precision
If a camera is used to capture sleeping posture, then posture data can be obtained, but recognition accuracy decreases when users cover themselves with blankets
Solution Approach 1:
The patent replaces optical imaging with mechanical pressure sensing. The pressure sensor array measures the distribution and magnitude of forces exerted by the user's body on the mattress, capturing essential posture information through tactile mechanics rather than optical imaging, thus remaining effective regardless of visual obstruction.
3Object-affected harmful factors
If a pressure sensor array is used instead of camera, then user privacy is preserved, but system complexity increases
Solution Approach 1:
The patent divides the detection system into discrete pressure sensing elements arranged in an array within the mattress. Each sensor independently measures local pressure, and the collective data forms a pressure distribution map. This segmentation allows the system to achieve comprehensive posture recognition through distributed simple sensors rather than a single complex imaging device.
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
Accurately recognizes sleeping posture in real-time with enhanced accuracy and privacy preservation.
Implementation Method 1
a pressure sensor array, and the pressure sensor array is used to obtain two-dimensional analog signal data of body pressure
Data Source
AI summary
Disclosed in the present application are a sleeping posture recognition method and system based on a deep neural network. The method includes the steps of: inputting body pressure sample data into a deep neural network for training learning, to obtain a sleeping posture recognition model; obtaining a two-dimensional body pressure array in real time by using a detection device, the detection device obtaining two-dimensional body pressure analog signal data by means of a pressure sensor array, and converting the two-dimensional body pressure analog data into the two-dimensional body pressure array by means of an A/D conversion module; and transmitting the two-dimensional body pressure array to a server for preprocessing, and inputting the preprocessed two-dimensional body pressure array into the sleeping posture recognition model for recognition.