Portable Terminal Device Radio Wave Strength Difference Calculation
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Solution Overview
Problem
Existing portable terminal devices struggle to accurately identify the intended image processing device when multiple devices are closely arranged and have similar radio wave strengths, leading to incorrect selections due to the reliance on maximum radio wave strength detection.
Innovation Solution
A portable terminal device with a radio wave strength detection unit, difference calculation unit, and identification unit that calculates differences in radio wave strengths between devices and identifies the intended device based on preset values, considering factors like action mode, power-saving mode, and device usage, to ensure accurate selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image processing device with the maximum radio wave strength is selected, then the selection process is simplified, but the accuracy of identifying the intended device decreases when multiple devices are closely arranged
Solution Approach 1:
The patent changes the selection parameter from absolute radio wave strength to relative difference in radio wave strength. By calculating the difference between the maximum strength and the second maximum strength, and comparing it against a threshold, the system maintains operational simplicity while improving identification accuracy in environments with closely arranged devices.
2Measurement precision
If the portable terminal device is moved to detect radio wave strength changes, then the intended device can be identified more accurately, but the time required for device selection increases
Solution Approach 1:
The patent applies partial action by using radio wave strength detection without requiring complete user movement to each device. The system achieves sufficient accuracy by detecting strength differences while the terminal remains relatively stationary, avoiding the time loss associated with excessive movement while still improving upon static maximum-strength selection.
3Reliability
If a threshold value for radio wave strength difference is set to filter device selection, then incorrect device selection is reduced, but the complexity of the selection algorithm increases
Solution Approach 1:
The patent introduces a threshold parameter (second value) that filters device selection based on the difference in radio wave strength. This simple parameter-based filtering mechanism improves reliability by excluding devices with insufficient signal difference, while maintaining algorithmic simplicity through a straightforward threshold comparison rather than complex multi-factor analysis.
Data Source
AI summary
A portable terminal device includes: a receiving unit that receives an action instruction in a predetermined action mode given by a user for one image processing device among a plurality of image processing devices; a radio wave strength detection unit that receives a radio wave for measuring the strength of the radio wave to detect the strength of radio wave of each of the image processing devices; a radio wave strength difference calculation unit that calculates differences in the strengths of radio waves between the image processing device with the maximum strength of radio wave and the other image processing devices; an identification unit that identifies, as the image processing device to which the action instruction received is given, the image processing device having the maximum strength of radio wave; and an instruction unit that gives the action instruction in the action mode to the image processing device.