Dynamic Danger Zone Adjustment for CMM Safety
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Solution Overview
Problem
Existing coordinate-measuring machines (CMMs) pose a risk of injury due to high movement speeds, making it difficult to ensure safety for personnel, as traditional safety installations often slow down or shut down the entire device unnecessarily, even when it's not required.
Innovation Solution
A method that dynamically adjusts the size of the monitored danger region based on the relative position and movement of the CMM's movable parts, allowing for real-time control of movement speeds and reducing unnecessary data processing by focusing monitoring on only the current danger zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the movement speed of the CMM is increased to improve measurement performance, then productivity is improved, but the risk of injury to persons increases due to high kinetic energies
Solution Approach 1:
The patent applies dynamics by making the monitored location region variable in size based on the real-time position and movement of the portal. The monitoring system dynamically adjusts the danger zone boundaries according to the portal's acceleration, speed, and position, allowing high speeds when safe and reducing speeds when persons are near moving parts.
Solution Approach 2:
The system uses feedback by continuously monitoring the position of the portal and the size of the location region, then adjusting the monitored region accordingly. The control system receives information about the portal's movement state and modifies the danger zone boundaries in real-time to match the actual risk level.
2Reliability
If traditional safety installations are used to prevent injury risk, then safety is improved, but the device must be shut down or slowed down even when not necessary
Solution Approach 1:
The patent applies local quality by monitoring only the specific location region that is actually at risk, rather than treating the entire workspace as a danger zone. The system adjusts the monitored region's size and position based on the portal's current state, focusing safety resources only where needed while allowing unrestricted operation in safe areas.
Solution Approach 2:
The monitored location region is made dynamic, expanding when the portal is accelerating or positioned in high-risk areas, and contracting or disappearing when the portal is stationary or in safe positions. This dynamic adjustment allows the system to maintain safety only where and when necessary.
3Reliability
If the monitored location region is kept large to ensure safety coverage, then safety is improved, but data processing load increases
Solution Approach 1:
The size of the monitored location region is dynamically adjusted based on the portal's position, speed, and acceleration. When the portal is stationary or moving slowly in safe positions, the monitored region contracts to minimal boundaries or disappears entirely. When the portal accelerates or enters high-risk zones, the monitored region expands to provide adequate safety coverage.
Solution Approach 2:
Instead of monitoring a uniformly large region, the system concentrates monitoring resources on the specific local area that is actually at risk. The monitored region's boundaries are precisely defined based on the portal's current state, focusing computational resources only on the relevant danger zone rather than the entire workspace.
Data Source
AI summary
A method for monitoring a coordinate-measuring machine (CMM), having a monitoring device which is set up to monitor at least one location region of the CMM, in which a movable part of the CMM is movable, wherein the method includes:monitoring the at least one location region with the monitoring device, wherein the monitored location region is variable in terms of its size,ascertaining the position of the movable part of the CMM relative to a fixed position associated with the location region and/or ascertaining the movement of the movable part relative to the fixed position, andsetting or varying the size of the monitored location region in dependence on the position and/or the movement of the movable part relative to the fixed position.