Hall-Sensor Rotary Remote Control for Low-Power Actuation Detection
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Solution Overview
Problem
Battery-powered remote controls face challenges with reduced battery life due to increased functionality and miniaturization, necessitating a solution that conserves energy without requiring electrical re-wiring or mechanical switch replacement.
Innovation Solution
A battery-powered remote control device with a sensing circuit, processing circuit, and wake-up logic that enters a sleep state when idle, using PWM to enable sensors periodically, and includes a rotatable portion with Hall-effect sensors to detect movement, optimizing power usage and enabling wireless communication and LED illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional features and functionality are added to battery-powered remote controls, then device capability is improved, but battery life deteriorates
Solution Approach 1:
The remote control enters sleep mode after detecting no actuation for a predetermined time period, periodically waking to check for new actuations. This periodic operation allows the device to maintain full functionality when needed while dramatically reducing power consumption during idle periods, thus extending battery life without sacrificing device capability.
2Volume of moving object
If the remote control size is reduced, then portability is improved, but battery size and battery life deteriorate
Solution Approach 1:
By implementing sleep mode with periodic wake-up checks, the remote control can use a smaller battery while maintaining acceptable operational duration. The device only consumes significant power during brief active periods, allowing size reduction without proportionally reducing battery life.
Solution Approach 2:
The remote control dynamically adjusts its power consumption state based on usage patterns, transitioning between active and sleep modes. This dynamic operation allows the device to optimize the balance between size, battery capacity, and operational duration.
3Speed
If the processing circuit remains continuously active to detect actuation, then response time is improved, but power consumption increases
Solution Approach 1:
The processing circuit periodically wakes from sleep mode to check for actuations using the actuation detector. This periodic checking maintains adequate response time for user interactions while dramatically reducing average power consumption compared to continuous operation.
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 solution extends battery life by reducing power consumption during idle periods and allowing advanced control features without re-wiring or replacing mechanical switches, providing energy savings and efficient operation.
Implementation Method 1
one or more sensing circuits (e.g., a first and second Hall-effect sensor circuits) that are configured to generate respective first and second sensor control signals in response to magnetic fields generated by the magnetic elements
Data Source
AI summary
Provided herein are examples of a remote control device that provides a retrofit solution for an existing switched control system. The remote control device may comprise a control circuit, a rotatable portion, a magnetic ring coupled to the rotatable portion, and first and second Hall-effect sensor circuits configured to generate respective first and second sensor control signals in response to magnetic fields generated by the magnetic elements. The control circuit may operate in a normal mode when the rotatable portion is being rotated, and in a reduced-power mode when the rotatable portion is not being rotated. The control circuit may disable the second Hall-effect sensor circuit in the reduced-power mode. The control circuit may detect movement of the rotatable portion in response to the first sensor control signal in the reduced-power mode and enable the second Hall-effect sensor circuit in response to detecting movement of the rotatable portion.