Range-finding Device Display Update Control
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Solution Overview
Problem
Continuous distance measurement by range-finding devices becomes difficult for users to interpret due to frequent updates in measurement results, especially when targeting objects with specific shapes or sizes, as the display changes rapidly.
Innovation Solution
A range-finding device with a display update control unit that sustains previously calculated distance displays for a predetermined holding time or until a significant change is detected, preventing frequent updates and allowing users to focus on stable measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous distance measurement is performed with frequent updates, then measurement precision is improved, but ease of operation deteriorates due to difficult interpretation of rapidly changing display
Solution Approach 1:
The patent applies periodic action by implementing a display update control mechanism that updates the distance display only at predetermined time intervals rather than continuously. This periodic updating reduces the frequency of display changes to a manageable level while still providing regular measurement updates, thereby resolving the contradiction between measurement precision and ease of operation.
Solution Approach 2:
The patent implements dynamics by making the display update behavior adaptive based on measurement stability. The system dynamically adjusts between frequent updates when measurements are stable and less frequent updates when measurements fluctuate, optimizing both measurement precision display and user interpretation ease according to real-time conditions.
2Productivity
If distance display is updated every time measurement is calculated, then productivity is improved, but stability of display composition deteriorates causing user confusion
Solution Approach 1:
The patent applies periodic action by implementing a display update control mechanism that updates the distance display only at predetermined time intervals rather than continuously. This periodic updating reduces the frequency of display changes to a manageable level while still providing regular measurement updates, thereby resolving the contradiction between measurement precision and ease of operation.
Solution Approach 2:
The patent implements dynamics by making the display update behavior adaptive based on measurement stability. The system dynamically adjusts between frequent updates when measurements are stable and less frequent updates when measurements fluctuate, optimizing both measurement precision display and user interpretation ease according to real-time conditions.
3Ease of operation
If display update is prohibited based on small distance changes, then ease of operation is improved by stabilizing display, but loss of information increases by not showing all measurement variations
Solution Approach 1:
The patent applies parameter changes by introducing a threshold parameter for distance change detection. The display update control mechanism compares measurement changes against this threshold and only suppresses updates when changes are below the threshold, thereby maintaining display stability while preserving information about significant measurement variations.
Solution Approach 2:
The patent implements local quality by applying different update behaviors to different types of measurement changes. Small changes below the threshold are suppressed to stabilize the display, while larger changes above the threshold are still displayed, creating a differentiated approach to information presentation based on the significance of the change.
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
This solution enhances user convenience by stabilizing the displayed distance during continuous measurement, reducing the need for users to memorize brief displays and preventing misinterpretation of measurement results, while ensuring accurate updates after the holding time elapses.
Implementation Method 1
a light emitting unit that continuously emits measurement light to be used for distance measurement toward a measurement target object
Implementation Method 2
a light-receiving unit that receives reflected light reflected by the measurement target object
Data Source
AI summary
A range-finding device includes: a light emitting unit that continuously emits measurement light to be used for distance measurement toward a measurement target object; a light-receiving unit that receives reflected light reflected by the measurement target object; a calculation unit that repeatedly calculates a distance to the measurement target object over predetermined time intervals by using the reflected light; a display unit at which an update of the distance is displayed each time the distance is calculated by the calculation unit; and a display update control unit that prohibits the update of the distance on display at the display unit and sustains the display of the previously calculated distance at the display unit according to a change in the most recently calculated distance calculated most recently by the calculation unit relative to the previously calculated distance having been calculated previously by the calculation unit.