Liquid-Level Transmitter Temperature Compensation for Accurate Measurement
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Solution Overview
Problem
Conventional liquid-level transmitter devices face accuracy issues due to changes in operative characteristics, such as temperature, which lead to errors in measurement, and existing solutions often require manual data entry or external sensors, which can introduce inaccuracies and access hazards.
Innovation Solution
The liquid-level transmitter device automatically compensates for changes in operative characteristics using built-in sensors and pre-defined data tables, eliminating the need for external sensors and manual data entry, thereby improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual data entry is used to compensate for temperature effects, then measurement accuracy can be improved, but the risk of human error and time consumption increase
Solution Approach 1:
The level transmitter device automatically performs compensation calculations using its own processor and stored calibration data, eliminating the need for manual data entry. The device self-corrects measurement errors by retrieving relevant calibration parameters and applying compensation algorithms automatically, thus improving accuracy without increasing time consumption.
Solution Approach 2:
Calibration data and compensation parameters are pre-stored in the device's memory during manufacturing or initial setup. This preliminary preparation allows the device to quickly retrieve and apply correction factors without requiring manual data entry during operation, thereby maintaining high measurement accuracy while minimizing time loss.
2Measurement precision
If external sensors are used to measure temperature, then compensation data can be obtained, but access hazards and additional device complexity increase
Solution Approach 1:
The patent integrates the temperature sensing function directly into the level transmitter device itself, combining multiple measurement capabilities (level and temperature) into a single instrument. This eliminates the need for separate external sensors, thereby removing access hazards associated with external sensor installation while maintaining the ability to obtain accurate compensation data for temperature effects.
3Measurement precision
If the device structure is made more complex to improve measurement accuracy, then compensation capabilities increase, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces complex mechanical compensation mechanisms with electronic and software-based solutions. Instead of using additional mechanical components to physically compensate for temperature effects, the device uses a processor to calculate and apply correction factors based on stored calibration data, thereby improving measurement accuracy while keeping the physical device structure relatively simple.
Solution Approach 2:
The device improves measurement accuracy by changing operational parameters (such as retrieval of different calibration parameters based on temperature conditions) rather than by adding complex physical structures. The processor dynamically adjusts measurement calculations based on retrieved calibration data, achieving high precision through parameter manipulation rather than structural complexity.
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 enhances measurement accuracy by automatically correcting for drift in physical properties like Young's Modulus, reducing errors and improving reliability without requiring external sensors or extensive data entry.
Implementation Method 1
a sensor member disposed on the liquid-level transmitter device. The sensor member can be configured to generate an output that defines a second input temperature
Implementation Method 2
the devices can have a structure to convert buoyant action of one or more components into a measured value that reflects the level of liquid in a vessel or a reservoir
Implementation Method 3
These components can include shafts (and like tubular, elongate elements) that couple the buoyant component with a sensor and/or other element that generates the measurement. In one example, the shaft can rotate in response to the torque
Data Source
AI summary
A method that configures a liquid-level transmitter device to generate a measured value for a level of a liquid. The method includes steps to correct for changes in physical properties of one or more components of the device. In one embodiment, the method utilizes a correction value that incorporates data from a temperature sensor disposed inside of the device, for example, inside of the electronics member.