Sample Injector Optical Syringe ID for Precision
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Solution Overview
Problem
Conventional sample injectors often result in inadequate analysis due to incorrect settings of the syringe's internal volume, leading to inappropriate sample amounts being injected into analyzers, which can be exacerbated by human error or forgotten settings.
Innovation Solution
An automatic sample injector equipped with a syringe movement mechanism and an optical sensor that reads a first identification code on the syringe, determining the piston's movement based on the preset sample amount and internal volume, thereby preventing incorrect settings and ensuring accurate sample injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual setting of syringe internal volume is used, then device complexity is reduced, but measurement precision deteriorates due to incorrect settings
Solution Approach 1:
The syringe performs self-identification by having its internal volume automatically read via an optical sensor that scans a code on the syringe body, eliminating the need for manual setting and ensuring accurate measurement without increasing device complexity
Solution Approach 2:
The manual mechanical setting process is replaced with an optical sensing system that automatically reads the syringe's internal volume information, substituting human operation with an optical measurement system to improve precision
2Measurement precision
If optical sensor is added to read syringe identification code, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The optical sensor serves multiple functions: reading the syringe's internal volume code and verifying syringe installation, consolidating these functions into a single component to minimize the increase in device complexity while maintaining measurement precision
3Reliability
If automatic reading of syringe internal volume is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The syringe's internal volume information is pre-encoded on the syringe body itself, and the optical sensor automatically reads this information before injection, ensuring reliable operation without requiring complex real-time calculations or additional control systems
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 configuration significantly reduces the difference between the intended and actual sample amounts injected, preventing inadequate analysis and simplifying the device configuration by eliminating manual errors and reducing the risk of incorrect syringe installation or type settings.
Implementation Method 1
an optical sensor configured to read the first identification code attached to the syringe installed in the syringe movement mechanism
Data Source
AI summary
A sample injector is configured to determine an amount of movement of a piston for injecting a sample into an analyzer based on a preset amount of the sample to be injected into the analyzer and information of a first identification code about an internal volume read by an optical sensor.