Alarm Playback Presence Check for Reliable Bed Exit Detection
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Solution Overview
Problem
Existing alarm devices fail to accurately detect the absence of a user on a bed, leading to unclear detection of user presence or absence.
Innovation Solution
An alarm playback device equipped with a sensor that detects position and movement, a detection part to determine presence, a sound control part to play alarms based on presence conditions, and a check execution part to verify normal detection states, generating images or messages when abnormal states are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional alarm devices are used to detect user presence on a bed, then the device structure remains simple, but the detection accuracy of user presence or absence is insufficient
Solution Approach 1:
The alarm playback device is divided into multiple functional modules: a sensor unit for detecting position and movement, a detection part for processing sensor output, a determination part for judging presence conditions, a sound control part for alarm playback, and a check execution part for verifying detection normality. This segmentation allows each module to specialize in a specific function, improving overall detection accuracy while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent introduces an image generation part as an intermediary component that creates visual representations of detection states. This intermediary translates complex sensor data and detection results into comprehensible images, enabling better verification of detection accuracy without directly complicating the core detection mechanism. The image generation serves as a bridge between the detection system and user understanding.
2Reliability
If no state check processing is implemented, then the device operation remains simple, but the reliability of detection results cannot be ensured
Solution Approach 1:
The check execution part implements a feedback mechanism that continuously monitors the detection state and determines whether the sensor is functioning normally. When an abnormal state is detected, the system generates feedback through images or messages to notify users of potential detection failures. This feedback loop ensures reliable detection results by actively verifying system status and communicating any issues to the user.
Solution Approach 2:
The system performs preliminary check processing to determine the normality of the detection state before final presence determination is made. By pre-verifying that the sensor and detection mechanisms are functioning correctly, the system ensures that subsequent presence/absence determinations are based on reliable data, preventing false alarms or missed detections.
3Loss of information
If visual feedback is generated for abnormal detection states, then user awareness of detection status is improved, but information processing requirements increase
Solution Approach 1:
The image generation part operates selectively rather than continuously - it generates visual feedback only when abnormal detection states are identified. This partial action approach provides necessary information feedback to users about detection status while avoiding the excessive energy consumption that would result from continuous image generation and display updates, even when no abnormalities exist.
Data Source
AI summary
An alarm playback device, includes: a sensor, output of which changes in accordance with a position or movement of an object in a determination area; a detection part configured to perform detection based on output of the sensor; a determination part configured to determine whether a presence condition is satisfied based on detection results; a sound control part configured to control playback of an alarm sound based on whether the presence condition is satisfied; and a check execution part configured to execute state check processing for determining whether a detection state is a normal state. The check execution part determines that a detection state is a normal state when a normality determination condition including the presence condition not being satisfied is satisfied, and determines that a detection state is an abnormal state when the normality determination condition is not satisfied.