Ink Ejection Inspection Device Nozzle Residual Vibration Analysis
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Solution Overview
Problem
Existing ink ejection inspection methods cannot accurately determine the state of ink ejection from each nozzle due to variations in nozzle capacity and piezoelectric element properties, leading to inaccurate detection of defective nozzles.
Innovation Solution
An ink ejection inspection device equipped with a hardware processor that compares the feature values of residual vibration waveforms from each nozzle with individually set determination thresholds, allowing for precise determination of nozzle states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a commonly used determination threshold is applied to all inspection target nozzles, then the inspection process is simple, but the determination accuracy deteriorates due to variations in nozzle capacity and piezoelectric element properties
Solution Approach 1:
The patent applies local quality by assigning individual determination thresholds to each nozzle based on its specific characteristics (capacity, piezoelectric element properties). Instead of using a uniform threshold for all nozzles, the system customizes the threshold for each nozzle to account for variations in its physical properties, thereby improving determination accuracy while maintaining operational simplicity through automated threshold assignment.
2Measurement precision
If individual determination thresholds are set for each nozzle, then the determination accuracy improves, but the device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the inspection device to automatically determine and assign individual determination thresholds for each nozzle without manual intervention. The system autonomously analyzes nozzle characteristics and sets appropriate thresholds, thereby achieving high determination accuracy while avoiding the complexity that would arise from manual threshold configuration and management.
3Device complexity
If a common threshold is used for all nozzles, then the inspection system is simple, but the reliability of defective nozzle detection deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the determination threshold parameter for each nozzle based on its specific physical characteristics. Instead of using a fixed common threshold, the system modifies the threshold parameter to match each nozzle's unique properties (capacity, piezoelectric element characteristics), thereby significantly improving the reliability of defective nozzle detection while maintaining system simplicity through automated parameter adaptation.
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 approach enables high-accuracy determination of ink ejection states from each nozzle, independent of capacity and impedance variations, thereby improving the precision of image formation through controlled ink ejection.
Implementation Method 1
The ink ejection device ejects ink droplets from nozzles by driving piezoelectric elements provided in the nozzles by drive elements
Implementation Method 2
a waveform of residual vibration obtained by applying a voltage to each of the nozzles
Data Source
AI summary
An ink ejection inspection device can determine a state of ejection of ink from each of nozzles with high accuracy. An ink ejection inspection device for inspecting a state of ejection of ink from a plurality of nozzles provided in an ink ejection device includes a hardware processor that determines the state of ejection of ink from each of the nozzles by comparing a feature value indicated by a waveform of residual vibration obtained by applying a voltage to each of the nozzles with a determination threshold set for each of the nozzles.