Pressure-Based Density Measurement in Vertical Conduits
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Solution Overview
Problem
Conventional density measuring systems for solutions are plagued by issues of insufficient durability, high cost, inaccuracy, and lack of temperature compensation, making them unsuitable for accurate process control in automated systems.
Innovation Solution
A novel sensor system utilizing a single pressure sensor to measure the pressure of a column height of solution flowing through a vertical pipe, with temperature compensation to achieve accurate density and concentration measurements, eliminating the need for multiple pressure sensors and reducing variability and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional density measuring systems are used, then density measurement is provided, but the systems suffer from insufficient durability, high cost, inaccuracy, and lack of temperature compensation
Solution Approach 1:
The patent replaces conventional mechanical density measuring systems with a pressure-based measurement system. A pressure sensor measures the pressure exerted by a column of solution in a vertical pipe, and density is calculated from this pressure measurement along with temperature data. This substitution of the measurement mechanism improves both accuracy and durability while reducing cost.
Solution Approach 2:
The patent changes the measurement parameter from direct density measurement to pressure measurement. By measuring pressure (which is easier to measure accurately and more durably) and converting it to density through calculation using the relationship P = ρgh, the system achieves better reliability and accuracy. Temperature compensation is also applied to maintain precision under varying conditions.
2Measurement precision
If multiple pressure sensors are used to measure density, then measurement capability is provided, but device complexity and cost increase
Solution Approach 1:
The patent merges the functions of multiple pressure sensors into a single pressure sensor measurement. Instead of using multiple sensors to directly measure density, the system uses one pressure sensor to measure the pressure of a solution column, combining this with temperature measurement and computational processing to achieve density determination. This reduces device complexity and cost while maintaining measurement precision.
Solution Approach 2:
The patent introduces an intermediary computational process that converts pressure measurement data into density information. Rather than directly measuring density with complex sensors, the system measures pressure (a simpler parameter) and uses calculations based on hydrostatic principles to derive density. This intermediary step simplifies the physical measurement apparatus while preserving measurement accuracy.
3Measurement precision
If temperature compensation is not implemented, then system simplicity is maintained, but measurement accuracy deteriorates due to temperature variations
Solution Approach 1:
The patent implements temperature compensation through a feedback mechanism where temperature is measured by a sensor and this information is used to adjust the density calculation. The system continuously monitors temperature and applies appropriate compensation to the pressure-based density measurement, ensuring accuracy across varying temperature conditions without requiring complex mechanical temperature control.
Solution Approach 2:
The patent accounts for temperature effects by changing the measurement approach to include temperature as a compensating parameter. Rather than trying to maintain constant temperature (which would require complex control systems), the system measures temperature and uses it to correct the density calculation, achieving accuracy while maintaining system simplicity.
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 system provides reliable, accurate, and cost-effective measurement of solution density and concentration, enhancing process control by maintaining a constant flow rate and compensating for temperature variations, thus improving the precision and reliability of density measurements.
Implementation Method 1
a single pressure sensor configured to measure a pressure of a column height of solution flowing through a vertical pipe
Data Source
AI summary
Methods and systems are provided to detect a density and/or a concentration of a brine solution or any other solution flowing in a conduit. A diverted portion of the brine solution may be received from the conduit at a vertical pipe. The vertical pipe has a top and a bottom, where the diverted portion of the brine solution is received at the bottom of the vertical pipe and the top of the vertical pipe is at atmospheric pressure. A pressure sensor may detect a pressure of the brine solution in the vertical pipe. A processor may determine the density and/or the concentration of the brine solution based on the detected pressure of the brine solution and a property of a reference solution.