Displacement Measuring Apparatus with Dynamic Mode Switching
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Solution Overview
Problem
Existing displacement measuring apparatuses struggle to accurately measure displacement at a predetermined position of a measurement object, especially when the object remains stationary or moves, as they are limited by the need for specific scanning modes and lack flexibility in handling changes in the object's position or posture.
Innovation Solution
A displacement measuring apparatus is designed with a light projector, scanning part, light receiver, mode selector, and measurement controller, enabling switching between scanning and line modes to measure displacement at a predetermined position, with the ability to adjust irradiation direction and average multiple measurements for increased accuracy, and incorporating features like position correction using luminance and edge information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If scanning mode is used to measure displacement at different positions, then measurement coverage is improved, but measurement time increases
Solution Approach 1:
The system dynamically switches between scanning mode (for comprehensive coverage) and line mode (for rapid single-point measurement) based on measurement requirements. The light receiver and scanning part can operate in different modes to balance coverage and speed, allowing the system to adapt its measurement strategy in real-time.
Solution Approach 2:
The measurement process is segmented into different modes: scanning mode for comprehensive area measurement and line mode for focused single-point measurement. This segmentation allows the system to divide measurement tasks appropriately, using scanning when full coverage is needed and line mode when speed is prioritized for specific points.
2Speed
If line mode is used for single position measurement, then measurement speed is improved, but adaptability to object movement decreases
Solution Approach 1:
The system employs dynamic mode switching capability, allowing transition between line mode (for speed) and scanning mode (for adaptability). When objects are stationary or movement is minimal, line mode provides rapid measurement. When object movement is detected or expected, the system can switch to scanning mode to capture displacement across multiple positions, maintaining measurement accuracy despite object motion.
Solution Approach 2:
The displacement measuring apparatus is designed with multi-functional capability to perform both line mode and scanning mode measurements. This universality allows the same system to handle both stationary objects (using line mode for speed) and moving objects (using scanning mode for adaptability), making the apparatus versatile for various measurement scenarios.
3Measurement precision
If multiple measurements are averaged for accuracy, then measurement precision is improved, but measurement time increases
Solution Approach 1:
The system dynamically determines the number of averaging measurements based on measured variability. When initial measurements show low variation, the system reduces the number of averaging operations. When high variation is detected, it increases averaging count. This dynamic adjustment optimizes the balance between achieving required precision and minimizing measurement time.
Solution Approach 2:
The measurement parameters including averaging count are made changeable based on measured conditions. The system monitors measurement results and adjusts the averaging parameter accordingly, increasing it when precision is compromised and decreasing it when sufficient accuracy is achieved, thereby optimizing measurement time while maintaining required precision.
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 apparatus effectively measures displacement at a predetermined position both when the object is stationary and when it moves, providing high accuracy and flexibility by adjusting to changes in the object's position and posture, and facilitating efficient operation through mode selection and data averaging.
Implementation Method 1
light that is reflected back from the surface of the measurement object is received by a light receiving element
Implementation Method 2
The two-dimensional light receiving element is configured to output a received-light quantity distribution in response to receiving the measurement light that is reflected back from the measurement object
Data Source
AI summary
To enable measurement of a displacement at a predetermined position in the case in which a measurement object remains stationary and also in the case in which the measurement object moves. A light projector and a scanning part are controlled to cause measurement light to sequentially irradiate different positions of the measurement object in a case in which a scanning mode is selected. On the other hand, the light projector and the scanning part are controlled to cause the measurement light to irradiate the same positions of the measurement object in a case in which a line mode is selected. The displacement of the measurement object is measured on the basis of a received-light quantity distribution output from a light receiver.