Short answer

Designers can leverage 3D printing to create custom, integrated sensor systems for assistive devices, focusing on material selection (conductive/non-conductive) and system-level integration to optimize performance.

Field: Modelling
Source: IEEE Sensors Journal (2023)
Method: Experimental validation and prototyping
Evidence: Strong effect

A fully 3D-printed linear encoder, utilizing conductive and non-conductive filaments, can achieve a high resolution of 0.4mm when integrated into a wearable assistive device, demonstrating the potential of additive manufacturing for functional medical sensors. This modelling research insight is drawn from a 2023 study published in IEEE Sensors Journal. Using Experimental validation and prototyping, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Designers can leverage 3D printing to create custom, integrated sensor systems for assistive devices, focusing on material selection (conductive/non-conductive) and system-level integration to optimize performance.

Study

ModellingRecentStrong effect

3D-Printed Linear Encoder Achieves 0.4mm Resolution for Wearable Assistive Devices

IEEE Sensors Journal · 2023

Key Findings

01A 3D-printed linear encoder achieved a resolution of 1.2 mm.
02Integration into a sensorized hand orthosis with geometric shifts improved resolution to 0.4 mm.
03The system demonstrated stable operation under various conditions, including actuation speeds, temperatures, printing repeatability, and fatigue.

Application

Design takeaway

How to apply

When designing wearable sensors or assistive devices, consider 3D printing as a method for rapid prototyping and potential final production, especially for custom or complex geometries. Explore the use of conductive filaments for integrated circuitry.

Project actions

01Explore using conductive PLA or other conductive 3D printing filaments for creating integrated circuits.
02Consider how multiple simple sensors can be combined to achieve higher overall accuracy and functionality.

Method & Evidence

AimTo develop and evaluate a 3D-printable, cost-effective linear encoder for integration into wearable assistive devices, assessing its resolution, reliability, and manufacturing repeatability.

MethodExperimental validation and prototyping

ProcedureA linear encoder was designed and fabricated using 3D printing with conductive and non-conductive filaments. The encoder's scale and sliding head were printed, and electrical circuitry was integrated. The encoder was tested for resolution and robustness under varying speeds, temperatures, and fatigue cycles. It was then integrated into a sensorized hand orthosis with three encoders and a microcontroller, and its performance was re-evaluated.

ContextDevelopment of assistive devices for the ageing population, specifically hand orthoses.

Variables

IV["Integration of multiple encoders (single vs. three)","Actuation speed","Temperature","Printing repeatability"]

DV["Encoder resolution (mm)","Encoder robustness/stability"]

CV["Materials used (conductive/non-conductive filaments)","3D printing technology","Microcontroller type","Basic encoder design principles"]

Strengths & Limitations

Strengths

+Demonstrates a novel application of 3D printing for functional sensing.
+Achieves a notable resolution for a printed sensor system.
+Tests robustness under various conditions.

Limitations

The resolution achieved might be dependent on the specific 3D printer and filament used. The complexity of integrating electronics and ensuring reliable connections can be a challenge.

Reliability & validity

Reliability was assessed through fatigue testing and operation under various conditions. Validity is supported by the integration into a functional assistive device and the achievement of specific resolution metrics.

Think critically

To what extent can the resolution and reliability of 3D-printed sensors be further improved by exploring different printing technologies or advanced material composites?

Design Principles

"Functional components for assistive devices can be fabricated using additive manufacturing with precise control over resolution and reliability."

This research showcases how advanced modelling and prototyping techniques, specifically 3D printing, can be used to create functional components for assistive technologies. It highlights the feasibility of producing complex, integrated systems with precise sensing capabilities, directly impacting the design and manufacture of user-centred assistive devices.

What This Means for Your Design

You can 3D print sensors that are really good at measuring movement, even for helping people with disabilities, and they can be quite accurate.

How to use in your project

1.Use this research to justify the selection of 3D printing for prototyping a sensor or functional component in your project.
2.Reference the resolution achieved as a benchmark for your own sensor design, if applicable.

Add to My Project

Quick Cite

Paragraph starter

The feasibility of using 3D printing for functional sensor components in assistive devices is supported by research demonstrating a 0.4mm resolution for a 3D-printed linear encoder integrated into a hand orthosis (Michalec & Faller, 2023). This highlights the potential of additive manufacturing to create cost-effective, custom solutions for user-centred design challenges.

Source

IEEE Sensors Journal

3-D-Printing and Reliability Evaluation of an Easy-to-Fabricate Position Sensing System for Printed Functional Wearable Assistive Devices

journal · 2023

View source

Questions About This Research

What does the research say about 3d-printed linear encoder achieves 0.4mm resolution for wearable assistive devices?: Designers can leverage 3D printing to create custom, integrated sensor systems for assistive devices, focusing on material selection (conductive/non-conductive) and system-level integration to optimize performance. Evidence: IEEE Sensors Journal (2023).
Why does "3D-Printed Linear Encoder Achieves 0.4mm Resolution for Wearable Assistive Devices" matter for design?: This research showcases how advanced modelling and prototyping techniques, specifically 3D printing, can be used to create functional components for assistive technologies. It highlights the feasibility of producing complex, integrated systems with precise sensing capabilities, directly impacting the design and manufacture of user-centred assistive devices.
How can designers apply this research?: Designers can leverage 3D printing to create custom, integrated sensor systems for assistive devices, focusing on material selection (conductive/non-conductive) and system-level integration to optimize performance.
What were the main findings?: A 3D-printed linear encoder achieved a resolution of 1.2 mm.. Integration into a sensorized hand orthosis with geometric shifts improved resolution to 0.4 mm.. The system demonstrated stable operation under various conditions, including actuation speeds, temperatures, printing repeatability, and fatigue.
What research method was used?: Experimental validation and prototyping.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2023 journal from IEEE Sensors Journal.
What should I do differently in my next project?: When designing wearable sensors or assistive devices, consider 3D printing as a method for rapid prototyping and potential final production, especially for custom or complex geometries. Explore the use of conductive filaments for integrated circuitry.
What are the limitations?: The study focused on specific commercially available materials and a particular type of assistive device; performance may vary with different materials or applications. Long-term durability beyond fatigue testing was not extensively detailed.