Dynamic Bar Code Display for Appliance Pairing
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Solution Overview
Problem
The efficiency of recognizing two-dimensional bar codes is low due to the need for users to repeatedly adjust the distance between a terminal device and a household appliance, leading to inefficiencies in scanning and user experience.
Innovation Solution
A method and device that determine the relative position between the terminal device and the household appliance, adjusting display parameters such as size and angle of the bar code to ensure optimal recognition, eliminating the need for user-adjusted distances and improving scanning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the two-dimensional bar code is fixedly arranged on the household appliance, then the device structure is simple, but the user needs to repeatedly adjust the distance between the terminal device and the household appliance, reducing recognition efficiency
Solution Approach 1:
The system performs preliminary actions by determining the relative position between the terminal device and household appliance before displaying the bar code, and adjusts display parameters in advance to ensure optimal recognition conditions, eliminating the need for user adjustments during scanning
Solution Approach 2:
The system uses feedback from radio signal intensity to dynamically adjust display parameters. The terminal device receives radio signals from the household appliance, determines signal intensity, and uses this feedback to calculate appropriate display parameters that ensure the bar code is optimally sized for recognition at the current distance
2Measurement precision
If the distance between the terminal device and household appliance is too large, then the bar code can be fully displayed, but the terminal device may hardly recognize the two-dimensional bar code
Solution Approach 1:
The system changes display parameters dynamically based on the determined relative position. When the distance is large, the bar code is displayed at a larger size; when the distance is small, the bar code is displayed at a smaller size. This parameter adjustment ensures the bar code occupies an appropriate proportion of the terminal device screen for accurate recognition
3Measurement precision
If the distance between the terminal device and household appliance is too small, then the bar code can be clearly displayed, but the camera is unable to collect the whole two-dimensional bar code
Solution Approach 1:
The system adjusts the display size parameter based on the relative position. When the terminal device is close to the household appliance, the bar code is displayed at a smaller size to ensure it fits within the camera's field of view. When the terminal device is farther away, the bar code is displayed at a larger size to maintain recognition accuracy
Data Source
AI summary
Disclosed are a method and device for recognizing a two-dimensional bar code for improving the efficiency of recognizing the two-dimensional bar code. The method comprises: a relative position of a household appliance and a terminal device is determined during network configuration of the household appliance; a display parameter for displaying the two-dimensional bar code is determined according to the relative position, wherein the display parameter comprises a size of the two-dimensional bar code to be displayed and the two-dimensional bar code carries device information of the household appliance; the display parameter is sent to the household appliance to enable the household appliance to display a two-dimensional bar code picture according to the display parameter; and the two-dimensional bar code picture is recognized to obtain the device information of the household appliance.