Two-Stage Liquid Dispensing for Fast and Precise Colorant Dosing
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Solution Overview
Problem
Existing colorant dispensers face challenges with low blending efficiency and precision due to the need for frequent weight readings and the instability of color paste density caused by bubbles, sedimentation, and temperature changes.
Innovation Solution
A liquid outpouring method involving two outpouring devices operating at different precision levels, where the first device outpours a preset liquid at a constant volume with lower precision, followed by static weighing and calculation of the remaining amount, which is then outpoured by the second device at higher precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If weight measurement method is used for color paste adding, then measurement precision can be improved, but working efficiency deteriorates due to frequent real-time weight readings and feedback control
Solution Approach 1:
The outpouring process is divided into two distinct stages: a first outpouring stage with lower precision requirements and a second outpouring stage with higher precision requirements. This segmentation allows the system to optimize for speed in the first stage and precision in the second stage, resolving the contradiction between working efficiency and measurement precision.
Solution Approach 2:
The first outpouring device performs preliminary outpouring of color paste before the second outpouring device completes the precise measurement. This preliminary action removes the bulk of the material needed, reducing the workload and time required for the precision-critical second outpouring stage.
2Productivity
If volume measurement method is used for color paste adding, then working efficiency can be improved, but measurement precision deteriorates due to density instability caused by bubbles, sedimentation, and temperature changes
Solution Approach 1:
Different precision levels are applied to different stages of the outpouring process. The first outpouring stage uses lower precision volume measurement for efficiency, while the second outpouring stage uses higher precision volume measurement for accuracy. This local differentiation of quality requirements resolves the contradiction between working efficiency and measurement precision.
Solution Approach 2:
The system changes the precision parameter of volume measurement between the two outpouring stages. The first stage operates with lower precision parameters to maintain high speed, while the second stage switches to higher precision parameters to ensure accurate measurement, thus resolving the contradiction between working efficiency and measurement precision.
3Measurement precision
If single high-precision outpouring is used, then measurement precision can be improved, but working efficiency deteriorates due to slow outpouring speed
Solution Approach 1:
The outpouring process is segmented into two devices: the first outpouring device handles the majority of the volume at lower precision for speed, while the second outpouring device handles the remaining volume at higher precision for accuracy. This segmentation allows both high speed and high precision to coexist in the overall process.
Solution Approach 2:
The first outpouring device performs a partial outpouring action that exceeds the minimum required volume, deliberately leaving a smaller remainder for the second precision device. This partial action at lower precision enables the system to achieve overall high precision without sacrificing the speed benefit of the first device.
Data Source
AI summary
A liquid outpouring method and a liquid outpouring device are provided. The liquid outpouring method comprises: outpouring, at a constant volume, a preset liquid at first outpouring precision; performing static weighing on the liquid which is outpoured at the constant volume, and determining an actual liquid outpouring amount; calculating a remaining liquid outpouring amount according to the actual liquid outpouring amount and a target outpouring amount; and outpouring, at a constant volume, the remaining liquid outpouring amount at second outpouring precision, wherein the first outpouring precision is lower than the second outpouring precision, and an outpouring error of outpouring the liquid at the first outpouring precision is greater than an outpouring error of outpouring the liquid at the second outpouring precision.