Distance-Sequence Remote Control for Reliable User Action Detection
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Solution Overview
Problem
Existing remote control systems inaccurately detect user actions due to erroneous detection of objects other than the user's body, leading to unintentional operation of controlled devices and restrictive sensor placement requirements.
Innovation Solution
A remote control system that utilizes distance information from a sensor to verify user actions by requiring a specific sequence of distance changes, including a hold and return action within defined time frames, to ensure accurate detection and prevent unintentional operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sensor detection area is expanded to improve ease of operation, then the ease of operation is improved, but the reliability deteriorates due to erroneous detection of objects other than the user's body
Solution Approach 1:
The system requires the user to perform a preliminary action of holding the body portion stationary in the detection area for a predetermined time period before the door control is activated. This preliminary holding action distinguishes intentional user interaction from transient detection of other objects, thereby improving reliability while maintaining ease of operation with a sufficiently large detection area.
2Reliability
If the sensor detection area is restricted to improve reliability, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The system implements a preliminary action where the user must hold their body portion stationary in the detection area for a predetermined time. This time-based verification allows the system to use a larger detection area for ease of operation while filtering out false detections through the requirement of sustained presence, thus maintaining reliability.
3Measurement precision
If the detection time is extended to improve measurement precision, then the measurement precision is improved, but the loss of time increases
Solution Approach 1:
The system changes the parameter of detection time by introducing a predetermined time period requirement for the user to hold their body portion in the detection area. This parameter change allows the system to achieve sufficient measurement precision to distinguish user actions from false detections while keeping the time requirement practical and acceptable, thus balancing precision and time loss.
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
Enhances the accuracy of user action detection, allowing flexible sensor placement and reducing unintentional device operation, thereby improving convenience and usability.
Implementation Method 1
a sensor 11 that outputs distance information DS indicating a distance to an object located at the closest position in a detection area A
Data Source
AI summary
A sensor outputs distance information indicating a distance to an object located in a detection area. A control device controls an operation of a device to be controlled based on a fact that the distance information satisfies prescribed conditions that include: i) a condition that the distance exhibits a change corresponding to an entry of the object into the detection area; ii) a condition that the distance maintains a first value for at least a first time length; and iii) a condition that a change of the distance including a monotonic decrease from the first value and a subsequent monotonic increase to a second value is finished within a second time length, wherein a difference between the first value and the second value is no greater than a threshold value.