Sump Pump Water Vibration Sensing for Float Sensor Fault Detection
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Solution Overview
Problem
Current sump pump systems lack the ability to automatically detect impending failures, leading to potential flooding and costly water damage due to malfunctioning float sensors, which represent a single point of failure.
Innovation Solution
The system employs sensors such as accelerometers and force sensors to detect water motion and acceleration, allowing for the estimation of water levels and identification of potential faults in float sensors, triggering the sump pump to activate and prevent overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a float sensor is used to detect water levels for sump pump control, then the pump activation and deactivation can be automated, but the system becomes vulnerable to sensor failures that go undetected until damage occurs
Solution Approach 1:
The system continuously monitors float sensor readings and compares them against expected patterns. When the float sensor indicates a water level that contradicts the actual water condition (detected by the accelerometer), the system generates a feedback signal to alert the user of potential sensor failure, enabling timely intervention before flooding occurs.
Solution Approach 2:
An accelerometer is introduced as an intermediary device that indirectly measures water level by detecting water motion and acceleration patterns. This intermediary sensor provides a secondary verification mechanism that does not rely on direct contact with water, thereby detecting float sensor failures without being susceptible to the same failure modes.
2Device complexity
If traditional water level sensors are used, then the system structure remains simple, but the ability to detect impending failures is lost
Solution Approach 1:
The accelerometer serves multiple functions: it detects water level indirectly through motion patterns, monitors water flow dynamics, identifies pump activation events, and provides failure detection capability. This multi-functional approach adds predictive capability without requiring multiple specialized sensors, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent replaces the traditional mechanical float sensor with an accelerometer-based detection system. The accelerometer uses inertial measurement rather than mechanical buoyancy to detect water level changes, eliminating the mechanical components that are prone to failure while preserving the essential water level detection function.
3Measurement precision
If the sump pump waits for float sensor confirmation before activation, then false activations are reduced, but response time to actual flooding conditions is delayed
Solution Approach 1:
The accelerometer continuously monitors water motion and acceleration patterns in advance, detecting abnormal water level rise trends before the float sensor would trigger. When the accelerometer detects a rapid water level increase that contradicts float sensor readings, it initiates pump activation proactively, preventing flooding before it occurs rather than waiting for float sensor confirmation.
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
This solution enables early detection and prevention of sump pump failures, reducing the risk of flooding and extending the lifespan of sump pump components by addressing the vulnerability of float sensors.
Implementation Method 1
The second sensor (e.g., a force sensor or accelerometer) may be configured to detect motion or acceleration
Data Source
AI summary
A sump pump system may detect and utilize motion or acceleration of water in sump basins when implementing control of sump pumps. To detect the motion or acceleration, the sump pump system may utilize a sensor that is configured to detect motion or acceleration, such as an accelerometer or gyroscope. The sump pump system may identify a water level in a sump basin based on the detected motion or acceleration, which may be compared to a reading or expected signal from the sump pump system's “typical” sensor (e.g., float switch) that is used to detect one or more water levels. In this manner, the sump pump system may detect a malfunctioning level sensor that is used by the pump to detect high-water and low-water marks at which the sump pump activates and deactivates, respectively.