Pharmaceutical Injection Device Cartridge Identification via Multi-Color Optical Sensing
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Solution Overview
Problem
Conventional pharmaceutical injection devices face issues with proper identification of pharmaceutical cartridges due to soiling of the color sensor, which can lead to incorrect cartridge type recognition.
Innovation Solution
The device employs a light emitting component that shines light of different colors onto the pharmaceutical cartridge and a light receiving component to identify the cartridge type based on the received light amounts, even if dirt or dust adheres to the sensor, ensuring accurate identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a color sensor is used to identify the pharmaceutical cartridge type, then the cartridge type identification is enabled, but the sensor becomes susceptible to soiling from dust or dirt that adheres to the transparent cover, leading to incorrect identification
Solution Approach 1:
The patent introduces a light emitting component as an intermediary element that actively illuminates the cartridge with multiple colors. This mediator enables the light receiving component to receive reflected light from the cartridge's color label, allowing identification through comparative analysis of reflected light intensities across different wavelengths, thereby making the system less vulnerable to soiling effects
Solution Approach 2:
The patent changes the operational parameters by using multiple light colors (wavelengths) instead of relying on a single color sensor reading. The controller varies the light emission color and compares the reflected light intensities at different wavelengths, which allows the system to distinguish cartridge types while compensating for uniform soiling effects that affect all wavelengths similarly
2Object-affected harmful factors
If a transparent cover is provided to protect the color sensor, then the sensor is protected from direct contamination, but dust or dirt can still adhere to the cover and block light transmission, preventing proper sensor function
Solution Approach 1:
The light emitting component acts as an intermediary that compensates for reduced light transmission by providing active illumination. The system emits light through the transparent cover, and the light receiving component detects the reflected light from the cartridge, with the controller processing these signals to identify cartridge types despite the cover's presence and potential soiling
Solution Approach 2:
The system incorporates feedback through the controller that receives light reception signals and analyzes reflected light intensities. By comparing the intensities across multiple colors and using this feedback information, the controller can distinguish between variations caused by soiling and those caused by cartridge type differences, maintaining identification accuracy
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 solution allows for reliable identification of pharmaceutical cartridges despite soiling, preventing incorrect identification and ensuring proper operation.
Implementation Method 1
a light receiving component that receives light shined from the light emitting component onto the pharmaceutical cartridge and reflected by the pharmaceutical cartridge
Data Source
AI summary
A pharmaceutical injection device may comprise a main body case having a cartridge holder, a piston that pushes out the pharmaceutical of a pharmaceutical cartridge held in the cartridge holder, a light emitting component, a light receiving component, and a controller. The light emitting component may shine light of different colors on the pharmaceutical cartridge disposed in the cartridge holder. The light receiving component receives light that has been shined from the light emitting component onto the pharmaceutical cartridge and reflected by the pharmaceutical cartridge. The controller may shine from the light emitting component and identify the type of pharmaceutical cartridge.