Drug Injection Device with Acceleration Sensor for Tremor Control
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Solution Overview
Problem
Conventional drug injection devices often fail to ensure proper injection due to user hand tremors, which can lead to inaccurate targeting of the injection site.
Innovation Solution
A drug injection device equipped with a three-dimensional acceleration sensor that detects abnormal vibrations, such as hand shakes, and adjusts its operation to prevent improper injection by halting or retracting the needle if excessive acceleration is detected, ensuring the injection is carried out safely and accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional drug injection device is used, then the device structure is simple, but the injection accuracy deteriorates due to hand tremors
Solution Approach 1:
The patent replaces mechanical stability mechanisms with an electronic control system comprising an acceleration sensor and controller. The acceleration sensor detects hand tremors and the controller processes this data to control the piston drive motor, substituting purely mechanical approaches with sensor-based electronic control to achieve both simplicity and accuracy.
Solution Approach 2:
The patent implements a feedback loop where the acceleration sensor continuously monitors device vibration during injection, and the controller adjusts the piston drive motor operation based on detected tremors. This real-time feedback enables dynamic correction of injection accuracy without requiring complex mechanical pre-adjustments.
2Reliability
If no acceleration sensor is used, then the device complexity is low, but the reliability of proper injection deteriorates
Solution Approach 1:
The acceleration sensor provides continuous feedback on device stability, enabling the controller to make real-time adjustments to ensure proper injection. This feedback mechanism significantly improves injection reliability by detecting and compensating for hand tremors that would otherwise cause injection errors.
Solution Approach 2:
Instead of using complex mechanical stabilization mechanisms, the patent employs an electronic sensor-based system. The acceleration sensor and controller combination provides a more reliable and less complex solution than mechanical alternatives, achieving proper injection through electronic control rather than mechanical rigidity.
3Manufacturing precision
If hand tremor detection is not implemented, then the device is simpler to operate, but the injection precision deteriorates
Solution Approach 1:
The device performs self-correction by automatically detecting hand tremors through the acceleration sensor and adjusting the injection process accordingly. The system serves itself by monitoring its own stability and making necessary adjustments without requiring user intervention or specialized operating techniques, thus maintaining both precision and simplicity.
Solution Approach 2:
The hand tremor detection system provides automatic feedback control that adjusts injection parameters in real-time based on detected vibrations. This eliminates the need for users to manually compensate for tremors, maintaining operation simplicity while achieving high injection precision through automated feedback control.
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
The device effectively prevents drug injection errors caused by hand tremors by using an acceleration sensor to monitor and control the injection process, ensuring the drug is administered correctly and safely.
Implementation Method 1
an acceleration sensor which detects acceleration of the main body case
Data Source
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AI summary
A drug injection device (100) comprises a main body case (1) having an injection needle let-in/let-out opening (5), a drug syringe mounting component (6) that is provided inside the main body case (1) and in which a drug syringe (7) is mounted, a piston (12) that is movable with respect to the drug syringe mounting component (6), a drive mechanism (14) that drives the piston, a controller (23) that is electrically connected to the drive mechanism (14), and an acceleration sensor (24) that is electrically connected to the controller (23). This drug injection device (100) allows the injection of a drug to be carried out safely and properly.