Laser Scanner Trajectory Control for Linear Object Measurement
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Solution Overview
Problem
Conventional laser scanners require complex and time-consuming manual settings for localized measurement ranges, especially when measuring objects with linear, rod, or columnar shapes, leading to inefficient data acquisition.
Innovation Solution
A measurement apparatus with a distance measuring unit, light producing and receiving elements, a deflecting unit, and a control unit that detects intersection points and adjusts the emission direction to ensure continuous measurement of objects with linear shapes by changing the scan trajectory, allowing for efficient data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual visual determination of localized measurement range is performed, then measurement accuracy can be achieved, but operation complexity and time consumption increase significantly
Solution Approach 1:
The system automatically detects linear objects and determines measurement ranges without manual intervention. The control unit autonomously identifies intersection points, calculates measurement parameters, and adjusts scan trajectories, enabling the system to serve itself rather than requiring operator input for localized range determination.
Solution Approach 2:
The patent replaces manual visual determination with an automated detection system using light reception signals and coordinate calculations. The mechanical/visual process of workers visually identifying and setting measurement ranges is substituted with an optical-electronic system that automatically detects objects and computes measurement parameters.
2Measurement precision
If manual visual determination of localized measurement range is performed, then measurement can be focused on specific areas, but time consumption increases significantly
Solution Approach 1:
The system autonomously identifies linear objects and determines appropriate measurement ranges without requiring workers to visually inspect and manually set parameters. The control unit automatically processes light reception signals, detects intersection points, and configures scan trajectories, eliminating the time-consuming manual setup phase.
Solution Approach 2:
The system performs preliminary automatic detection and analysis of the measurement environment before actual measurement begins. By pre-identifying linear objects and calculating optimal measurement parameters, the system prepares the measurement configuration in advance, reducing on-site time consumption.
3Measurement precision
If conventional scan methods are used for linear objects, then entire scan area is covered, but measurement efficiency decreases
Solution Approach 1:
Instead of uniformly scanning the entire scan area, the system applies localized measurement only to detected linear objects. The scan trajectory is dynamically adjusted to concentrate measurement resources on identified targets, providing high-density data where needed while avoiding unnecessary scanning of empty spaces, thereby improving measurement efficiency.
Solution Approach 2:
The scan trajectory is made dynamic and adaptive rather than static and uniform. The control unit continuously adjusts the scan path based on real-time detection of linear objects and their positions, optimizing the measurement route to efficiently cover only relevant areas while maintaining complete object coverage.
4Extent of automation
If image data processing is used to determine measurement range, then automated detection is achieved, but processing time and computational load increase
Solution Approach 1:
The system extracts only the essential information needed for measurement - light reception signals corresponding to linear objects - and processes only this extracted data to detect intersection points and determine measurement ranges. This selective extraction approach achieves automated detection while minimizing processing time by avoiding comprehensive image data analysis.
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 simple and efficient measurement of entire objects with linear, rod, or columnar shapes by maintaining the measurement state after direction changes, ensuring high-density data acquisition without manual intervention.
Implementation Method 1
a light producing element which produces measurement light, a measurement light emitting unit which emits the measurement light
Implementation Method 2
a light receiving unit which receives reflected measurement light, and a light receiving element which receives the reflected measurement light and generates a light reception signal
Implementation Method 3
a deflecting unit which deflects a direction of emission of the measurement light relative to a reference optical axis and which is capable of performing a scan relative to a prescribed center in a circumferential direction with the measurement light
Data Source
AI summary
A measurement apparatus is provided that includes a distance measuring unit, a deflecting unit, and a calculation control unit which controls the distance measuring unit and the deflecting unit. The calculation control unit detects coordinates of a pair of intersection points of the object to be measured and a scan trajectory with the measurement light on the basis of a distance measurement result by the distance measuring unit and the direction of emission deflected by the deflecting unit. The calculation control unit controls a deflection operation of the deflecting unit so as to change the direction of emission on the basis of the coordinates of the pair of intersection points such that the scan trajectory with the measurement light and the object to be measured intersect with each other.