Pump Controller Emergency Run Mode Sensor Failure
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Solution Overview
Problem
Existing water level control systems for pumps are prone to sensor or motor failures, leading to undesirable flood conditions due to the inability to effectively manage pump operations when sensors fail or become disconnected.
Innovation Solution
A pump controller system that enters an 'Emergency Run' or 'SOS' mode when sensors fail, allowing for user-defined pumping intervals and alternating operation of pumps to maintain some level of pumping while minimizing adverse effects, such as flooding and wear on pumps, by using a configurable setting that includes remote alarm notifications and sensor redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor redundancy and emergency run mode are implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary actions by detecting sensor failures and transitioning to emergency run mode before actual flooding occurs. The controller monitors sensor status and proactively switches to alternative pumping strategies when sensor failures are detected, preventing the harmful condition rather than reacting to it.
Solution Approach 2:
The system prepares compensatory measures in advance by having a second pump on standby and pre-programmed emergency operation modes. When a sensor failure is detected, the system has already prepared alternative pumping configurations to cushion against the potential flooding hazard.
2Productivity
If pumps operate continuously in emergency mode, then productivity is improved, but loss of energy increases
Solution Approach 1:
The system implements periodic action by alternating between two pumps in emergency run mode. When one pump operates, the other rests, and they switch periodically to share the workload. This reduces energy consumption compared to running a single pump continuously while maintaining effective water removal through coordinated periodic operation.
Solution Approach 2:
The system changes operational parameters by switching between different pump configurations based on sensor status. In normal mode, pumps operate under standard parameters; in emergency mode, the system changes parameters to alternate pump operation, adjusting the timing and duration of each pump's operation to balance productivity and energy consumption.
3Reliability
If duplex pumping is restricted based on current draw, then reliability is improved, but productivity decreases
Solution Approach 1:
The system applies dynamics by making pump operation flexible and adaptive rather than fixed. The controller dynamically adjusts which pumps operate based on real-time electrical load conditions. When current draw limits are approached, the system dynamically switches between single-pump and dual-pump modes, optimizing the balance between electrical system reliability and pumping productivity.
Data Source
AI summary
A pump control system receives inputs from a low level fluid level sensor and a high level fluid level sensor. Based on inputs from the sensors, and in response to sensed trouble conditions, duplex pumping or pump specific simplex operation is restricted based on past and present pump current draws.