Automatic Analysis Device Idle Aspiration Detection
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Solution Overview
Problem
Existing automatic analysis devices face inefficiencies in determining idle aspiration due to unnecessary calculations, increasing arithmetic load and duration.
Innovation Solution
The device determines idle aspiration by calculating parameters related to the length of the path inside the dispensing probe, specifically focusing on the length of the portion filled with the sample, using pressure waveforms to differentiate between normal and idle aspiration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feature variables of pressure waveform are calculated and compared to normal waveform to determine idle aspiration, then idle aspiration detection is achieved, but arithmetic load and determination duration increase due to unnecessary calculations
Solution Approach 1:
The patent extracts only the essential parameter (aspirated sample volume or path length) from the complex pressure waveform analysis. Instead of calculating multiple feature variables and comparing them to normal waveforms, the system directly measures or calculates the volume of sample aspirated into the probe or the path length through which the sample passes, thereby reducing arithmetic load while maintaining detection accuracy.
Solution Approach 2:
The patent segments the aspiration process into distinct phases and focuses measurement on the critical parameter that differentiates normal from idle aspiration. By dividing the pressure waveform analysis into specific time intervals (aspiration phase, hold phase) and measuring only the relevant volume or path length parameter during these segments, the system avoids unnecessary calculations while reliably detecting idle aspiration.
2Reliability
If feature variables of pressure waveform are calculated and compared to normal waveform to determine idle aspiration, then idle aspiration detection is achieved, but determination duration increases due to unnecessary calculations
Solution Approach 1:
The patent extracts only the essential parameter (aspirated sample volume or path length) from the complex pressure waveform analysis. Instead of calculating multiple feature variables and comparing them to normal waveforms, the system directly measures or calculates the volume of sample aspirated into the probe or the path length through which the sample passes, thereby reducing determination duration while maintaining detection accuracy.
Solution Approach 2:
The patent skips the time-consuming steps of calculating multiple feature variables and performing comprehensive waveform comparisons. By directly measuring the aspirated volume or path length using simplified methods (such as pressure integration over a specific time interval or optical detection of sample position), the system rapidly determines whether idle aspiration occurred, significantly reducing determination duration.
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 simplifies the determination process, reducing computational time and cost, and improving efficiency by narrowing the parameters required for idle aspiration detection.
Implementation Method 1
a pressure sensor 26, the detected variation is converted into digital data by an AD converter 621
Data Source
AI summary
The purpose of the present invention is to provide an automatic analysis device capable of determining, through a simple processing, whether or not idle aspirate has occurred. The automatic analysis device according to the present invention determines whether or not idle aspirate has occurred, by calculating a parameter which specifies whether or not the length of a portion of a path through which the sample passes inside a dispensing probe is shorter than that during normal aspirate, the portion being actually filled with a sample (see FIG. 4).