Magnetic-Float Ink Level Measurement With Hall Drift Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ink liquid level height measuring apparatuses using Hall elements face challenges in accurately detecting minor changes in liquid level height due to output value drift over time, and capacitive sensors face sensitivity issues based on ink properties.
Innovation Solution
An ink liquid level height measuring apparatus utilizing a float with a magnet and a Hall element to detect magnetic flux density changes, coupled with a hardware processor that adjusts and corrects the liquid level height to a reference point, ensuring accurate measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a Hall element is used to continuously measure liquid level height, then measurement continuity is improved, but measurement precision deteriorates due to output value drift over time
Solution Approach 1:
The system performs preliminary calibration by adjusting the liquid level to a reference height and acquiring the Hall element output value at that reference state before normal measurement begins. This preliminary action establishes a baseline that compensates for drift and enables accurate continuous measurement throughout operation.
Solution Approach 2:
The system uses feedback by continuously comparing the Hall element output value with the reference output value acquired during calibration. The liquid level height is calculated based on the difference between current and reference output values, allowing the system to compensate for drift and maintain measurement precision over time.
2Use of energy by stationary object
If a capacitive sensor is used to measure liquid level height, then measurement continuity is improved, but measurement precision deteriorates due to dependence on ink physical properties
Solution Approach 1:
The invention replaces the capacitive sensor with a Hall element-based magnetic detection system. A magnet attached to a float generates a magnetic field that the Hall element detects, converting the measurement from electrical capacitance dependence to magnetic field dependence, thereby eliminating sensitivity issues related to ink physical properties.
Solution Approach 2:
The invention introduces a magnet and float as intermediary components between the liquid level and the Hall element sensor. The float moves with liquid level changes and carries the magnet, which generates a magnetic field detected by the Hall element. This intermediary system decouples the measurement from direct contact with ink, eliminating dependence on ink physical properties.
3Device complexity
If discrete liquid level detection between upper and lower limits is used, then device complexity is reduced, but measurement precision deteriorates as continuous liquid level information becomes unknown
Solution Approach 1:
The invention replaces complex multi-sensor systems or sophisticated capacitive measurement systems with a simple Hall element and magnet arrangement. The Hall element naturally provides continuous output values that directly correspond to liquid level height, achieving both simplicity and continuous measurement capability.
Solution Approach 2:
The system changes the measurement parameter from discrete threshold detection to continuous magnetic flux density measurement. The Hall element outputs continuous voltage values proportional to magnetic field strength, which in turn proportional to liquid level height, providing precise continuous measurement without increasing device 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
The apparatus achieves precise and continuous measurement of ink level height by compensating for output drift, enhancing detection accuracy and reliability.
Implementation Method 1
a Hall element that detects, as a continuous value, a change in magnetic flux density due to the magnet that moves together with the float
Implementation Method 2
a float that includes a magnet and moves in association with a change in the liquid level height
Data Source
AI summary
Provided is an ink liquid level height measuring apparatus that measures a liquid level height of ink in a container. The ink liquid level height measuring apparatus includes: a float that includes a magnet and moves in association with a change in the liquid level height; a Hall element that detects, as a continuous value, a change in magnetic flux density due to the magnet that moves together with the float; and at least one hardware processor. The at least one hardware processor adjusts the liquid level height to a reference height, acquires an output value of the Hall element, when the liquid level height is the reference height, and corrects the liquid level height based on the output value.