Dual-Path Surveying Optics for Simultaneous Scanning and Imaging
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Solution Overview
Problem
Existing surveying devices require separate processes for laser scanning and imaging, leading to prolonged measurement times.
Innovation Solution
A surveying device with a distance measuring unit and imaging unit positioned facing each other, using a deflecting optical member with two reflective surfaces to simultaneously execute distance measurement and imaging, and incorporating concave lenses to enhance measurement and imaging ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate processes are used for laser scanning and imaging, then each process can be executed independently, but measurement time becomes longer
Solution Approach 1:
The patent merges the laser scanning system and imaging system into a single integrated surveying device. The distance measuring unit and imaging unit share common components including the deflecting optical member, rotation mechanisms, and control systems. This allows both distance measurement and image capture to be performed simultaneously from the same position, eliminating the sequential execution requirement and reducing total measurement time.
Solution Approach 2:
The patent enables continuous simultaneous operation of both distance measurement and imaging functions. The computation control unit coordinates both units to operate concurrently, with the deflecting optical member directing both distance measuring light and external light to their respective detectors without interruption. This continuous parallel operation maximizes productivity and minimizes measurement time.
2Measurement precision
If distance measuring unit and imaging unit are positioned separately, then each unit can operate independently, but parallax occurs between measurement and image data
Solution Approach 1:
The patent employs asymmetric optical path design where the deflecting optical member has different reflective surfaces oriented at specific angles. One reflective surface directs distance measuring light to the light receiving unit, while another reflective surface directs external light to the imaging unit. This asymmetric configuration ensures that both optical paths originate from the same position but diverge to their respective detectors, eliminating parallax while maintaining functional independence.
3Productivity
If the deflecting optical member uses a single reflective surface, then the structure is simpler, but simultaneous distance measurement and imaging cannot be executed
Solution Approach 1:
The deflecting optical member is designed as a multi-functional component with multiple reflective surfaces. Each reflective surface is configured to handle a different function: one surface reflects distance measuring light to the light receiving unit for distance measurement, while another surface reflects external light to the imaging unit for image capture. This universal component performs multiple functions simultaneously, enabling both operations to proceed in parallel without requiring separate deflecting mechanisms.
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
Simultaneous execution of distance measurement and imaging reduces measurement time, eliminates parallax, and improves coloring accuracy of point cloud data.
Implementation Method 1
The deflecting optical member has two reflective surfaces for reflecting the distance measuring light, the reflected distance measuring light, and the external light at right angles
Implementation Method 2
a distance measuring unit including a light projecting unit configured to emit distance measuring light and a light receiving unit configured to receive reflected distance measuring light from an object to be measured
Implementation Method 3
an imaging unit capable of imaging an image of the object to be measured based on external light passing through an interior of the vertical rotation shaft
Data Source
AI summary
ProblemProvided is a surveying device that shortens measurement time.SolutionIncluded are a distance measuring unit 19 including a light projecting unit 28 configured to emit distance measuring light and a light receiving unit 31 configured to receive reflected distance measuring light from an object to be measured, a deflecting optical member configured to be rotated in a vertical direction via a vertical rotation shaft 11 that is hollow, a vertical rotation drive unit 13 configured to rotate the deflecting optical member in the vertical direction, a frame unit 5 in which the deflecting optical member is provided, a horizontal rotation drive unit 8 configured to rotate the frame unit in a horizontal direction, an imaging unit 21 capable of imaging an image of the object to be measured based on external light passing through an interior of the vertical rotation shaft, and a computation control unit 17 configured to compute a distance to the object to be measured based on a result of reception of the reflected distance measuring light into the light receiving unit. The distance measuring unit and the imaging unit are disposed at positions facing each other with the deflecting optical member interposed therebetween. The deflecting optical member has two reflective surfaces for reflecting the distance measuring light, the reflected distance measuring light, and the external light at right angles. The computation control unit simultaneously executes distance measurement via one of the two reflective surfaces and imaging via the other of the two reflective surfaces.