Magnetic Induction Pad for Bed Presence Detection
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Solution Overview
Problem
Conventional weight sensing devices installed in beds for monitoring patients have high margins of error and low sensitivity, causing discomfort and privacy concerns, as they rely on local compressions which are not accurately detected.
Innovation Solution
A magnetic induction pad with deformable bodies and magnetic modules that change volume to detect compression, allowing for adjustable detection of human presence on a bed using a processor and fluid delivery system, ensuring accurate detection with minimal modules and adjustable sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If weight sensing devices are installed in the bed to monitor patient presence, then patient monitoring capability is provided, but detection accuracy is poor and local compressions cause high margin of error
Solution Approach 1:
The bed is divided into multiple detection zones with magnetic induction modules distributed at different positions (head, middle, foot sections). Each zone independently detects magnetic field changes, allowing the system to distinguish between local compressions and actual patient presence/absence, thereby improving detection accuracy and reducing false positives.
Solution Approach 2:
Magnetic induction modules serve as intermediary sensors that detect changes in magnetic field strength caused by the patient's body. Instead of directly measuring weight or pressure, the system uses magnetic field variations as an intermediate indicator, which provides more reliable and accurate detection of patient presence compared to traditional weight sensing methods.
2Reliability
If surveillance cameras are installed to monitor patient safety, then patient safety monitoring is improved, but patient privacy and psychological comfort are compromised
Solution Approach 1:
The patent replaces optical surveillance systems (cameras) with magnetic field-based sensing technology. This substitution eliminates the need for visual monitoring while maintaining safety surveillance capabilities, thereby preserving patient privacy and reducing psychological discomfort associated with being constantly watched.
Solution Approach 2:
The magnetic induction modules act as unobtrusive intermediaries that detect patient status without requiring direct visual observation. This intermediary sensing method provides safety monitoring while being invisible to the patient, thus avoiding the psychological harm and privacy concerns associated with camera surveillance.
3Measurement precision
If multiple magnetic members are assembled in the magnetic induction pad to improve detection accuracy, then detection sensitivity increases, but device complexity and assembly difficulty increase
Solution Approach 1:
The magnetic induction system is segmented into multiple independent modules, each containing a magnetic member and its associated sensing circuitry. This modular segmentation allows for standardized manufacturing and simplified assembly, as each module can be independently tested and replaced without affecting the entire system, thereby reducing overall device complexity despite using multiple magnetic members.
Solution Approach 2:
The magnetic induction modules are designed with universal interfaces and standardized configurations that can be applied across different bed types and detection positions. This universality simplifies the assembly process and reduces the need for custom configurations, making it easier to deploy multiple magnetic members without proportionally increasing device complexity.
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 magnetic induction pad effectively determines whether a person is lying or has fallen off the bed with high accuracy, reducing anxiety and maintaining patient privacy by using a non-invasive, sensitive detection method.
Implementation Method 1
a magnetic induction pad that has a group of magnetic members, and data on the extent of the compression received by the magnetic induction pad may be obtained, by means of the group of magnetic members that is embedded within the magnetic induction pad for sensing the strength of compression
Implementation Method 2
a deformation body and a plurality of magnetic induction modules, whereby the interior of the deformation body may include a filling space that changes the volume and size of the deformation body
Data Source
AI summary
The present invention provides a magnetic induction pad. The magnetic induction pad includes a deformation body and a plurality of magnetic induction modules. The interior of the deformation body includes a filling space that is in connection with the outside via at least one gas nozzle. The external of the deformation body includes a first surface and a second surface. The first surface and the second surface include a plurality of first bag bodies and a plurality of second bag bodies, respectively. The plurality of first bag bodies are mutually arranged to form a first pattern. The plurality of second bag bodies are mutually arranged to form a second pattern that are the same as the first patterns, so as to enable the position of each of the plurality of first bag bodies on the first surface to have a corresponding arrangement to each of the plurality of second bag bodies of the second surface. The plurality of magnetic induction modules includes a group of magnetic members and a group of induction members. The group of magnetic members and the group of induction members are respectively arranged at the corresponding positions within the plurality of first bag bodies and the plurality of second bag bodies. According to the magnetic theory, it enables the determination of whether a human body lies down on a bed, on the basis of the degree of compression of the magnetic induction pad between the plurality of magnetic induction modules.