Injection Simulation Haptic Interface with Direct Motor Drive
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Solution Overview
Problem
Existing injection simulation systems fail to provide a realistic haptic sensation and quantitative evaluation using an actual syringe, as they often involve intermediate mediums that distort force transmission and require frequent model replacement, leading to inconvenience and cost.
Innovation Solution
An injection simulation system with a haptic interface that includes a syringe with an injection needle, a haptic unit measuring insertion angle and depth, and a control unit calculating and transmitting haptic force to a motor unit, along with a processing unit for displaying evaluation information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a haptic interface with intermediate medium (gear or belt) is used to transmit force from motor to plate, then the motor can drive the injection simulation, but force loss or distortion occurs due to the intermediate medium
Solution Approach 1:
The patent removes the intermediate medium (gear or belt) from the force transmission path by directly connecting the motor to the plate. This extraction of the problematic intermediate component eliminates force loss and distortion while maintaining the motor's driving capability.
Solution Approach 2:
The patent merges the motor and plate into a directly connected assembly, eliminating the need for separate transmission components. This integration ensures that the motor's force is transmitted accurately to the plate without interference from intermediate mechanisms.
2Ease of operation
If a syringe with different shape from actual syringe is used to push the plate, then the haptic interface can be actuated, but an unnecessary sensation of the injection needle being pulled occurs during insertion
Solution Approach 1:
The patent uses a syringe that replicates the exact shape and dimensions of an actual syringe, including the needle. This accurate copying ensures that when the syringe pushes the plate, the haptic sensation felt by the user matches the real injection experience, eliminating false sensations of needle pull.
3Ease of operation
If a realistic model mimicking the human body is used for injection simulation, then the training can be performed, but frequent model replacement is required which incurs inconvenience and cost
Solution Approach 1:
The patent creates a universal simulation platform where a single haptic unit can simulate different injection scenarios and patient responses through software control. This multi-functional design eliminates the need for frequent physical model replacement while maintaining training realism.
4Ease of operation
If a realistic model is used for injection simulation, then the training can be performed, but quantitative evaluation is difficult since data cannot be acquired
Solution Approach 1:
The patent incorporates sensors and measurement systems that provide real-time feedback on injection parameters such as insertion angle, insertion depth, and force applied. This feedback mechanism enables quantitative evaluation of injection results while maintaining the realism of the training model.
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
Enables realistic injection training and evaluation using an actual syringe, providing a precise haptic experience and quantitative assessment of injection results, suitable for medical education and training.
Implementation Method 1
a haptic unit measuring the insertion angle and the insertion depth of the injection needle
Implementation Method 2
a motor unit driven by a haptic force corresponding to the measured insertion angle and insertion depth
Implementation Method 3
a control unit calculating the haptic force corresponding to the measured insertion angle and insertion depth and transmitting the calculated haptic force to the motor unit of the haptic unit
Data Source
AI summary
Provided is an injection simulation system and method. The system includes a syringe comprising an injection needle, a haptic unit which measures an insertion angle and insertion depth of the injection needle, and which comprises a motor unit that is driven by a haptic force corresponding to the measured insertion angle and insertion depth. The system also includes a control unit which calculates the haptic force corresponding to the insertion angle and the insertion depth, and transmits the calculated haptic force to the motor unit of the haptic unit.