Movable Barrier Proximity Detection Suppresses Unwanted Alerts
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Solution Overview
Problem
Existing movable barrier operator systems often inadvertently trigger unnecessary imminent motion notifications when users operate barriers remotely while physically proximate, leading to user frustration and inconvenience, due to the system's inability to distinguish between attended and unattended operations based solely on the type of remote control used.
Innovation Solution
The system determines the user's proximity to the barrier by using methods such as dead reckoning, angle of arrival measurements, received signal strength indication, GPS data, and remote sensors like cameras, to decide whether to activate imminent motion notifications, thereby preventing unnecessary alerts when the user is within physical proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system triggers imminent motion notifications for all remote operations, then safety awareness is improved, but user frustration increases due to unnecessary alerts when users are physically present
Solution Approach 1:
The system changes the parameter of notification triggering from a binary state (always/never) to a conditional state based on detected user proximity. When the user is detected to be within a threshold distance, the notification parameter is changed to suppressed; when beyond the threshold, the notification parameter is changed to activated. This resolves the contradiction by adapting the notification behavior to the actual operational context.
Solution Approach 2:
The system implements feedback by continuously monitoring user proximity through sensors (camera, microphone, RFID) and using this information to dynamically control notification output. The feedback loop detects whether the user is present and adjusts the notification system accordingly, ensuring safety alerts are only triggered when actually needed, thus eliminating unnecessary frustration while maintaining safety awareness.
2Measurement precision
If the system uses multiple proximity detection methods, then accuracy of proximity determination is improved, but device complexity increases
Solution Approach 1:
The system segments the proximity detection function into multiple independent sensing modalities (camera-based visual detection, microphone-based acoustic detection, RFID-based radio frequency detection). Each sensor type operates independently to detect different aspects of user presence, and their results are combined to make the final notification decision. This segmentation improves measurement precision while keeping each individual sensing component relatively simple.
Solution Approach 2:
The system employs multi-functional sensing approaches where a single sensor type can serve multiple purposes. For example, the camera not only detects user presence but can also identify user identity and track user movement. The microphone array serves both proximity detection and potential voice command recognition. This universality improves measurement precision through redundant detection methods while avoiding the need for entirely separate systems for each function.
Data Source
AI summary
A movable barrier operator system is provided that includes a moving-barrier imminent motion notification apparatus, a motor, a controller, and communication circuitry configured to communicate with a remote control. In response to the communication circuitry receiving a communication from the remote control, the controller causes the motor to change the state of the movable barrier and additionally operate the moving-barrier imminent motion notification apparatus upon a determination of the remote control being beyond a physical proximity of a location associated with the movable barrier operator system. Upon a determination that the remote control is within the physical proximity, the controller refrains from operation of the moving-barrier imminent motion notification apparatus.