Dual-Measuring Unit Coordinate Measuring Machine
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Solution Overview
Problem
Existing coordinate measuring machines require large, expensive setups to measure both small areas with high accuracy and large areas with lower accuracy, making them inefficient for mixed-size objects and slow for precise small-area measurements.
Innovation Solution
A coordinate measuring machine with a dual-measuring unit system, where a high-accuracy measurement-piece drive unit measures small areas and a lower-accuracy probe drive mechanism measures large areas, allowing for cost-effective manufacturing and faster small-area measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large-size coordinate measuring machine is used to measure large objects, then the measurement space is sufficient, but the measurement cost increases and measurement speed decreases
Solution Approach 1:
The measurement system is segmented into two independent measuring units: a first measuring unit with high measurement accuracy for small areas, and a second measuring unit with lower measurement accuracy for large areas. This segmentation allows the system to use different measurement capabilities for different regions of the object, avoiding the need for a uniformly high-accuracy (and thus expensive and large) measurement system throughout.
Solution Approach 2:
Different measurement accuracies are assigned to different spatial regions: the first measuring unit provides high accuracy for local small-area measurements, while the second measuring unit provides sufficient accuracy for large-area measurements. This local differentiation of measurement quality allows cost reduction while maintaining necessary accuracy where required.
2Area of stationary object
If a large-size coordinate measuring machine is used to measure large objects, then the measurement space is sufficient, but the measurement speed decreases
Solution Approach 1:
The measurement system is segmented into two independent measuring units with different capabilities. The first measuring unit is optimized for high-speed, high-accuracy measurement of small areas, while the second measuring unit handles large-area measurements. This segmentation allows the system to switch between measurement modes based on the task, improving overall measurement speed for mixed-size objects.
Solution Approach 2:
The system dynamically selects which measuring unit to use based on the measurement requirements. For small areas requiring high accuracy, the first measuring unit is activated; for large areas where lower accuracy suffices, the second measuring unit is used. This dynamic adaptation optimizes measurement speed while meeting accuracy requirements.
3Measurement precision
If high measurement accuracy is provided for small areas, then measurement precision is improved, but the overall system cost increases
Solution Approach 1:
High measurement accuracy is provided only locally where required (small areas using the first measuring unit), while lower accuracy is acceptable for large areas (using the second measuring unit). This local differentiation of quality allows the system to meet precision requirements without incurring the full cost of a uniformly high-accuracy system.
Solution Approach 2:
Instead of providing excessive measurement accuracy throughout the entire measurement space, the system applies high accuracy partially only where necessary for small-area measurements. This partial application of high accuracy reduces system cost while still meeting the precision requirements for critical measurements.
Data Source
AI summary
A coordinate measuring machine has a coordinate measuring machine body and a controller. The coordinate measuring machine body has a probe having a measurement piece and a drive mechanism for driving the probe. The probe has a drive unit for driving the measurement piece. The controller includes a first measuring unit and a second measuring unit. The first measuring unit measures a displacement of the measurement piece driven by the drive unit. The second measuring unit measures a displacement of the probe. The measurement accuracy of the second measuring unit is lower than the measurement accuracy of the first measuring unit.