Desk Posture Reminder Using Millimeter-Wave Radar Centroid Detection
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Solution Overview
Problem
Existing sensors, such as infrared and ultrasonic sensors, provide inaccurate reminders due to relying on coarse information, failing to accurately determine user posture and duration, leading to ineffective anti-sedentary interventions.
Innovation Solution
Utilizing a millimeter-wave radar to determine the centroid of a user, integrating information from multiple body points to accurately assess posture and duration, and providing tailored reminders when thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared or ultrasonic sensors are used to detect user presence, then the device complexity is reduced, but the measurement precision of user posture and duration is insufficient
Solution Approach 1:
The patent replaces traditional mechanical/optical sensors (infrared, ultrasonic) with a millimeter-wave radar system. This substitution enables precise measurement of user centroid position and posture through electromagnetic wave detection, achieving accurate posture determination while maintaining system integration. The radar system detects user presence, position, and posture parameters with high precision without requiring complex sensor arrays.
2Measurement precision
If millimeter-wave radar is used to determine user centroid, then the measurement precision of posture and duration is improved, but the device complexity increases
Solution Approach 1:
The patent segments the user detection process into distinct functional modules: centroid determination unit, posture determination unit, and duration determination unit. Each module processes specific aspects of user information independently, simplifying the overall control logic despite using advanced millimeter-wave radar technology. This segmentation enables the controller to handle complex radar data through structured, modular processing steps.
3Reliability
If coarse information from traditional sensors is used, then the ease of operation is maintained, but the reliability of anti-sedentary reminders is reduced
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors user centroid position and posture through millimeter-wave radar, compares current state with historical data to determine duration, and provides targeted reminders based on accurate posture and time measurements. This feedback loop ensures high reliability of anti-sedentary reminders while automating the complex detection and analysis processes, maintaining ease of operation for the user.
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
Enables precise determination of user posture and duration, allowing for timely and effective reminders to promote posture adjustment, reducing health risks associated with prolonged sitting or standing.
Implementation Method 1
a millimeter-wave radar connected to the controller and configured to emit millimeter waves toward a user and receive reflected millimeter waves
Data Source
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AI summary
Embodiments of the present disclosure relate to reminder methods, desks, devices, controllers, and computer program products. The method includes determining the centroid of a user utilizing a desk by means of a millimeter-wave radar. The method further includes determining the posture of the user based on the centroid, and determining a first duration for which the user maintains the posture. The method further includes, in response to the first duration exceeding a time threshold, providing a reminder to the user. According to the method of the present disclosure, by calculating the centroid of a user utilizing the desk, the user's posture can be accurately determined, thereby enabling accurate reminders to be provided to the user.