Industrial Door Force Curve Comparison for Obstacle Handling
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Solution Overview
Problem
Existing industrial door force detection systems are prone to faults, leading to unnecessary downtime and the requirement for specialized maintenance technicians, as they often fail to differentiate between minor and major issues without additional equipment.
Innovation Solution
A method that uses a force detection component to compare current and previous force curves, switching the drive to reverse only in critical situations and employing a dead man's switch to overcome obstacles, allowing for continued operation without immediate maintenance, with optional optical and acoustic alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a force detection component is used to monitor the industrial door, then safety is improved, but the system becomes more complex and requires additional equipment
Solution Approach 1:
The force detection component serves multiple functions: it monitors force during normal operation, detects dangerous situations, and provides the basis for automated responses. This multi-functionality reduces the need for separate safety systems while maintaining high reliability
Solution Approach 2:
The system uses the existing force detection component to automatically detect and respond to dangerous situations without requiring additional specialized safety equipment or manual intervention, making the system self-monitoring and self-protecting
2Reliability
If the drive is stopped immediately when a limit value is exceeded, then safety is improved, but productivity deteriorates due to unnecessary downtime
Solution Approach 1:
The system dynamically adjusts its response based on the situation: it can stop the drive immediately for critical dangers, reverse for minor issues, or allow continued operation with monitoring for non-critical deviations. This dynamic response optimization balances safety with productivity
Solution Approach 2:
Instead of always stopping the drive completely, the system applies partial actions appropriate to the severity of the situation: reversal for minor obstacles, selective stopping for critical dangers, and continued operation for non-critical deviations, thereby minimizing unnecessary downtime while maintaining safety
3Reliability
If the drive is reversed when a limit value is exceeded, then safety is improved, but the ability to overcome minor obstacles deteriorates
Solution Approach 1:
The system dynamically selects the appropriate response action based on the nature and severity of the detected danger, allowing reversal for minor obstacles that can be overcome this way, while reserving immediate stopping for critical situations
Solution Approach 2:
The system changes operational parameters dynamically: it can switch between reversal mode and stopping mode based on the force curve analysis, allowing flexible adaptation to different obstacle types and severities
4Reliability
If specialized maintenance technicians are called for every fault, then reliability is improved, but loss of time increases due to waiting for technician availability
Solution Approach 1:
The system performs self-diagnosis and self-correction for minor faults by automatically detecting force curve deviations and executing appropriate responses (reversal, stopping, or continued operation), eliminating the need for technician intervention in many cases
Solution Approach 2:
The system continuously monitors force curves and provides immediate feedback on system status, allowing operators to understand and address issues promptly without waiting for technician assessment
Data Source
Figure 1~2
Figure 3
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AI summary
The invention relates to a device which is used to detect the force applied by the drive (2) during the movement of industrial doors (1), wherein a force-detecting component (16) that determines a force curve (15) for each run of the industrial door (1) is associated with the door controller (4) or with the drive (2). Said force curves (15, 22) are stored in a memory (17) and can be used for comparison with the subsequent force curve (18, 23) in order to thus detect possible hazardous situations and to switch the drive accordingly. The force-detecting component (16) then ensures that, in the case of upward movement initiated by the push-button switch (10) and occurring divergences between the force curves (15, 18), the industrial door (1) is stopped, while in the case of downward movement initiated by the push-button switch (11, 25), downward movement can be performed anew from the upper end position, to which the industrial door is automatically reversed. If a divergence of the force curves then occurs again, a new force curve can be determined anew by means of the push-button switch (11, 25), which is then connected in a dead-man's circuit. The new force curve is then the starting point of the further operation of such an industrial door (1).