Nested 3D Measurement Mirror Assembly Balancing
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Solution Overview
Problem
Existing 3D measurement devices face challenges in achieving stable and balanced rotation of mirrors, leading to imbalances due to manufacturing tolerances, which affect the accuracy of distance and angle measurements.
Innovation Solution
A compact mirror assembly with a slanted support structure and hollow interior region accommodates an electric motor, featuring a nested configuration that conserves space and includes asymmetrical design for balancing, along with adjustable pin insertion for fine balancing adjustments through bore holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a motor is integrated into the mirror assembly, then the mirror rotation is driven, but manufacturing tolerances cause imbalances
Solution Approach 1:
The patent introduces an asymmetrical balancing element with varying cross-sectional areas along its length. This asymmetrical design allows the balancing element to compensate for manufacturing tolerances and imbalances in the motor and mirror assembly, ensuring stable rotation and accurate measurements despite the automated motor-driven operation.
Solution Approach 2:
The balancing element's cross-sectional area is varied along its length to change its mass distribution parameters. By adjusting the cross-sectional dimensions at different positions, the balancing element can be tuned to counteract specific imbalances caused by manufacturing tolerances in the motor and mirror components.
2Volume of moving object
If the mirror assembly is made compact, then space is conserved, but balancing adjustments become difficult
Solution Approach 1:
The balancing element is nested within the compact motor housing, fitting inside the existing structural space. This nested configuration allows the balancing element to be integrated into the compact mirror assembly without increasing the overall volume, while still providing adjustable balancing capabilities through its removable and configurable design.
Solution Approach 2:
The balancing element is designed to be removable and reconfigurable, allowing dynamic adjustment of the mirror assembly's balance. This dynamic capability enables easy manufacturing adjustments and fine-tuning without permanently fixing the balance, accommodating both compact design and ease of manufacture requirements.
3Measurement precision
If manufacturing tolerances are tight, then measurement accuracy is improved, but production cost increases
Solution Approach 1:
The balancing element acts as a counterweight that compensates for imbalances caused by manufacturing tolerances in the motor and mirror components. Instead of requiring extremely tight manufacturing tolerances, the balancing element provides a mechanical counterbalance that achieves stable rotation and accurate measurements with more relaxed manufacturing specifications, reducing production complexity and cost.
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 solution provides stable rotation of the mirror, reduces imbalances, and enhances the accuracy of distance and angle measurements by ensuring perpetual and adjustable balancing, thereby improving the overall performance of the 3D measurement device.
Implementation Method 1
a light receiver which receives a reception light beam that is reflected or otherwise scattered by an object in the environment of the 3D measurement device
Implementation Method 2
A motor is provided having a rotor and a stator, the rotor being coupled to the shaft, the stator coupled to the motor housing
Data Source
AI summary
A 3D measurement device is provided that includes a base and a measuring head that can be rotated relative to the base about a first axis. A light emitter is provided which emits an emission light beam and a light receiver which receives a reception light beam. A control device determines the distance to an object. The mirror assembly is provided includes a motor housing and a shaft coaxial with the second axis. A motor is provided having a rotor and a stator, the rotor being coupled to the shaft, the stator coupled to the motor housing. A support structure has a body and a sidewall, the sidewall defining a hollow interior region that receives the rotor and the stator, the support structure further having a slanted section. A reflecting mirror is coupled to the slanted section for deflecting the emission light beam and the reception light beam.