Wireless Charging Device Proximity Sensor Energy Saving
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Solution Overview
Problem
Conventional measurement devices based on optical ranging cannot calculate the surface length of an object, limiting their functionality when surface length is required.
Innovation Solution
A measurement device equipped with a roller, proximity sensor, track sensing module, and optical ranging module, where a processor selectively turns on or off these modules based on estimated distance to optimize energy usage and determine whether to calculate track length or distance, using a roller to acquire relative movement and track sensing based on reference pictures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical ranging module is used to measure distance, then distance measurement capability is improved, but energy consumption increases and surface length calculation is not available
Solution Approach 1:
The system dynamically switches between optical ranging mode and track sensing mode based on the measured distance. When the object is far away, optical ranging is used for accurate distance measurement. When the object is close, track sensing is activated for surface length calculation and energy is conserved by turning off the optical ranging module.
Solution Approach 2:
The roller itself serves dual purposes: it is both the measurement object and the sensing surface. The track sensing module uses the roller's surface to calculate track length, eliminating the need for separate reference surfaces and reducing system complexity.
2Measurement precision
If track sensing module is activated continuously, then surface length calculation is improved, but energy consumption increases
Solution Approach 1:
The track sensing module is activated only when the proximity sensor detects that the object is within a predetermined distance threshold. This dynamic activation ensures that the track sensing module operates only when needed for surface length calculation, conserving energy during normal distance measurement operations.
Solution Approach 2:
The system changes operational parameters based on distance conditions. When distance is large, optical ranging parameters are used. When distance becomes small (object is close), the system switches to track sensing parameters, enabling surface length calculation while managing energy consumption.
3Adaptability or versatility
If multiple sensors are turned on simultaneously, then measurement versatility is improved, but interference between sensors increases
Solution Approach 1:
The system uses dynamic sensor management where the proximity sensor continuously monitors distance and controls the activation state of other sensors. This prevents simultaneous operation of conflicting sensors and eliminates interference while maintaining measurement versatility through conditional activation.
Solution Approach 2:
The proximity sensor provides continuous feedback about object distance, which the controller uses to adjust the operational state of the optical ranging module and track sensing module. This feedback mechanism ensures that sensors operate in complementary modes rather than simultaneously, preventing interference.
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 calculation of track length along an object's surface while conserving energy by intelligently selecting between track sensing and optical ranging modules based on proximity, improving functionality without interference from other sensors.
Implementation Method 1
a proximity sensor, configured to sense a proximity status between the measurement device and an object and accordingly provide an estimated distance
Implementation Method 2
the optical ranging module is also disposed in the measurement device and is configured to emit a light beam towards the outside of the measurement device and calculate a distance data according to the light beam being reflected
Implementation Method 3
The track sensing module is disposed in the measurement device and is configured to continuously capture a plurality of reference pictures of a regional surface of the roller and calculate a track length of the measurement device according to the plurality of reference pictures
Data Source
AI summary
A wireless charging device and an operation method thereof are provided. The wireless charging device includes a charging module, at least one proximity sensor and a central controller. The wireless charging device senses a distance variation between the wireless charging device and an object using the proximity sensor and accordingly determines whether to turn on or turn off the charging module to achieve energy saving.