Laser Measurement Device With Shaft Error Compensation
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Solution Overview
Problem
Existing measurement devices using laser light suffer from decreased measurement accuracy due to mechanical errors and refraction issues with transparent windows, leading to misalignment and reduced laser light emission accuracy.
Innovation Solution
A measurement device with a leveling mechanism and computation control section that adjusts the vertical rotating shaft to cancel out mechanical errors and prevent laser light from passing through bonding surfaces between transparent windows, ensuring accurate emission in specified directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vertical rotating shaft is not orthogonal to the horizontal rotating shaft due to mechanical error, then the device structure is simple, but the measurement accuracy decreases when laser light is emitted in the zenith direction
Solution Approach 1:
The invention introduces a computational correction mechanism that dynamically adjusts the intended emission direction based on the actual non-orthogonal geometry of the rotating shafts. The computation control section calculates compensation angles and rotates the laser emission section to emit laser light in the corrected zenith direction, thereby maintaining measurement accuracy despite mechanical manufacturing errors in the shaft orthogonality
Solution Approach 2:
The invention replaces the need for mechanically perfect orthogonal alignment with a computational solution. Instead of relying on precise mechanical manufacturing to ensure the vertical rotating shaft is exactly orthogonal to the horizontal rotating shaft, the system uses sensors to detect the actual geometry and computation algorithms to calculate and apply directional corrections, substituting mechanical precision requirements with computational compensation
2Adaptability or versatility
If multiple transparent windows are bonded together to expand measurement range, then the measurement range is expanded, but the measurement accuracy decreases when laser light passes through the bonding surface
Solution Approach 1:
The computation control section performs preliminary calculations to determine the optimal laser emission direction that avoids passing through the bonding surfaces between transparent windows. By pre-computing the corrected emission angle based on the known bonding surface locations and refraction characteristics, the system directs laser light through the transparent windows at angles that minimize refraction errors at the bonding interfaces
Solution Approach 2:
The computation control section acts as an intermediary between the laser emission section and the transparent windows. It calculates the precise emission direction that accounts for the refraction effects at each transparent window interface, especially at the bonding surfaces, and adjusts the laser direction accordingly to maintain measurement accuracy while utilizing the extended measurement range provided by multiple bonded windows
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 device maintains measurement accuracy by compensating for mechanical errors and window refraction, allowing precise laser light emission without significant computational overhead.
Implementation Method 1
a laser emission section that is connected to a vertical rotating shaft, is supported by the support frame section to be rotatable in a vertical direction, and emits laser light toward an irradiation target
Implementation Method 2
The laser light incident on the incident surface of the transparent window is refracted at the incident surface and travels through the transparent window such as glass
Data Source
AI summary
Provided is a measurement device capable of suppressing a decrease in measurement accuracy when laser light is emitted in a specified direction. A measurement device includes: a leveling mechanism section that performs horizontal leveling; and a measurement device body mounted on the leveling mechanism section. The measurement device body includes a support frame section that has a horizontal rotating shaft and is provided to be rotatable in a horizontal direction, a laser emission section that is connected to a vertical rotating shaft, is supported by the support frame section to be rotatable in a vertical direction, and emits laser light toward an irradiation target, and a computation control section. When the laser emission section emits the laser light in a specified direction, the computation control section performs control to tilt the leveling mechanism section, by a specified angle.