Syringe Encoding for Accurate Metering Detection
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Solution Overview
Problem
Existing metering systems with syringes and sensing devices are prone to errors in detecting the correct syringe size and metering amount, leading to erroneous metering due to sensor malfunctions or incorrect syringe insertion.
Innovation Solution
The syringe features encoding elements and checking elements in the form of protrusions and deepenings at specific positions, which are aligned with sensing elements in the metering device to ensure accurate detection, allowing only error-free sensing to trigger the metering device into an operating condition, thereby preventing erroneous metering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If encoding elements are added to the syringe for identification, then syringe size detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses protrusions and deepenings (geometric variations) on the syringe flange as encoding elements that can be detected by sensing elements. These geometric features serve as a mechanical code system that identifies syringe size and type without requiring complex electronic components, thus improving detection accuracy while maintaining relatively simple device structure.
Solution Approach 2:
The encoding information is copied onto the syringe flange in the form of geometric patterns (protrusions and deepenings) that replicate the syringe identification data. The sensing device reads this copied information to determine syringe characteristics, enabling accurate detection without complex integrated circuits or electronic storage.
2Measurement precision
If sensing elements are used to detect encoding, then metering accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent replaces complex electronic sensing systems with a simpler mechanical detection approach. The sensing elements mechanically engage with the protrusions and deepenings on the syringe flange, using mechanical contact rather than complex electronic fields to detect encoding information, thereby reducing energy consumption while maintaining detection precision.
Solution Approach 2:
The encoding elements (protrusions and deepenings) are integrated into the disposable syringe itself, eliminating the need for reusable, energy-consuming electronic identification components. The syringe carries its own identification code passively, and the sensing device only needs to read it without requiring continuous power for active transmission or complex processing.
3Reliability
If alignment structures are added to ensure proper positioning, then detection reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the alignment function with the encoding function by integrating the guiding structure directly into the syringe flange where the encoding elements are located. The same geometric features that provide encoding information also serve as alignment references, eliminating the need for separate alignment mechanisms and simplifying manufacturing while ensuring reliable positioning for detection.
Data Source
AI summary
A syringe with a syringe cylinder and a syringe, with a seat for the syringe cylinder and an axially displaceable piston seat for the syringe piston. There is an encoding on the syringe cylinder with encoding elements as protrusions and deepenings (depressions) at seven encoding positions, checking elements in the form of further protrusions and further deepenings at seven checking positions, each being disposed between two encoding positions. The encoding elements and the checking elements have six protrusions in total, and a guiding structure to align the syringe on a further guiding structure with each encoding element and with each checking element to a sensing element, said further guiding structure being disposed in the seat of the metering device and having a certain position with respect to an annular sensing device for sensing the encoding by sensing elements of the metering device that are across the circumference.