Automatic Sampler Weight Sensor Verification
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Solution Overview
Problem
Existing automatic samplers face challenges in accurately verifying the amount of sample suctioned from a sample container, leading to potential errors in analysis results due to deficient suction or insufficient sample, and require manual labor for weight measurement verification.
Innovation Solution
An automatic sampler equipped with a weight sensor, sample suction mechanism, and a controller that calculates the actual sample suction amount based on weight changes, allowing for automatic adjustment of suction volume and preventing air trapping by detecting the presence of a sample container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual weight measurement verification is performed to confirm sample suction amount, then measurement precision is improved, but loss of time and loss of labor increase
Solution Approach 1:
The automatic sampler performs self-verification of sample suction amount by automatically measuring the weight of the sample container before and after suction using an integrated weight sensor, eliminating the need for manual verification by the analyzer
Solution Approach 2:
The manual mechanical weighing process is replaced by an automatic electronic weight sensor system that continuously monitors and records the weight of the sample container, enabling automated calculation of suction amount
2Measurement precision
If manual weight measurement verification is performed to confirm sample suction amount, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically performs verification without requiring the analyzer to manually remove and weigh sample containers, eliminating artificial errors and simplifying the operation
Solution Approach 2:
The manual operation of removing racks and using scales is replaced by an automated electronic sensing and calculation system
3Device complexity
If the amount of sample suctioned is not accurately verified, then device complexity is reduced, but reliability deteriorates
Solution Approach 1:
The weight sensor serves multiple functions: detecting the presence of sample containers, measuring the weight before suction, measuring the weight after suction, and enabling calculation of the actual suction amount
Solution Approach 2:
The system uses weight measurement feedback to automatically calculate and verify the sample suction amount, comparing it with the predetermined amount to ensure reliable analysis results
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
Enhances sample injection accuracy into analyzing devices by automatically calculating and adjusting the suction amount, reducing manual errors and labor, and preventing air entrapment in the system.
Implementation Method 1
a weight sensor fixed to the sample container placing portion, for measuring the weight of the sample container placed in the sample container placing portion
Implementation Method 2
a sample suction mechanism for suctioning the sample from the sample container placed in the sample container placing portion
Data Source
AI summary
A weight sensor for measuring the weight of a sample container is fixed to a sample container placing portion. The amount of sample contained in the sample container placed in the sample container placing portion is determined based on a measurement value by the weight sensor. A change in amount of sample contained in the sample container is determined before and after sample suction by a sample suction mechanism. The amount of sample actually suctioned from the sample container is determined based on the change.