Liquid Depth Sensor Using Pressure Differential for Drum Monitoring
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Solution Overview
Problem
Current sensors for measuring liquid depth in drums are complex, expensive, unreliable, and lack the ability to monitor liquid withdrawals over time, detect trends, and send alerts for volume deviations.
Innovation Solution
A sensor apparatus with a tube and sensors to measure air and atmospheric pressures, allowing for automatic calculation of liquid depth and volume, including adjustments for the sensor's presence, and the ability to detect liquid withdrawals and send alerts for volume discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sensors are used to measure liquid depth in drums, then measurement capability is provided, but the sensors are complex, expensive, and unreliable
Solution Approach 1:
The patent replaces complex mechanical/electronic liquid level sensors with a simple pressure sensing system. A pressure sensor measures the pressure of air above the liquid in the drum, and through the hydrostatic pressure formula P = ρgh, the liquid depth is calculated. This substitution of direct mechanical liquid contact sensors with indirect pressure measurement significantly improves reliability while reducing complexity.
Solution Approach 2:
The patent introduces air as an intermediary medium between the sensor and the liquid. Instead of placing sensors directly in contact with the liquid (which causes reliability issues), the system measures air pressure above the liquid. The air acts as a mediator that transmits information about liquid level without direct contact, thereby improving sensor reliability and reducing complexity.
2Device complexity
If simple pressure sensors are used, then device complexity is reduced, but the ability to detect liquid withdrawals and monitor trends is lost
Solution Approach 1:
The patent implements a feedback system where pressure sensor readings are continuously taken and compared against expected values based on known liquid consumption rates. When the actual pressure deviation from expected pressure exceeds a threshold, the system generates an alert. This feedback mechanism enables withdrawal detection and trend monitoring using simple pressure sensors, preventing information loss while maintaining low complexity.
Solution Approach 2:
The patent makes the simple pressure sensor system multi-functional by using it not only for basic liquid level measurement but also for detecting liquid withdrawals, monitoring consumption trends, and generating alerts. The same pressure data serves multiple purposes: determining current level, detecting anomalies, tracking usage patterns over time, and triggering notifications. This universality prevents information loss while keeping the device simple.
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
The solution provides a simple, cost-effective, reliable method for monitoring liquid depth and volume in drums, enabling detection of withdrawals and volume deviations, thus ensuring efficient liquid management and alerting users to potential issues.
Implementation Method 1
A first sensor is disposed in the tube between the seal and the second end and is configured to measure air pressure in the tube
Implementation Method 2
A second sensor is in electronic communication with the processor and is configured to measure atmospheric pressure outside of the drum
Implementation Method 3
The processor is configured to automatically determine the depth of the liquid in the drum, according to: H=(Pb−Pa)/(PPIC*SGliquid)
Data Source
AI summary
Apparatus and method for determining: proper operation of a cleaning system, the depth of liquid in a drum, the predicted failure of a pump, improving the ability to monitor cleaning system, improving the ability to monitor dairy wash systems, improving the ability to monitor animal husbandry systems, and/or increasing the efficiency with which various types of equipment, fluid levels, and/or systems can be serviced or monitored.