A 3D Printed Physical Human–Robot Interface Based on a Sizing System to Facilitate Customization: Wearable Robots for Paraplegia
Abstract
:1. Introduction
2. Materials and Methods
2.1. Configuration of the Wearable Robot
2.2. Analysis of Sizing System Generation Method
2.3. Sizing System Development
2.3.1. Segmenting the Size Section
2.3.2. Generation of Average Human Body Model by Section
2.3.3. Development of 3DP-pHRI Based on Size System
3. Results and Discussion
3.1. Prototyping of 3DP-pHRI Based on the Sizing System
3.2. Evaluation of Conformity of Shape and Dimensions
3.2.1. Evaluation by Visual Observation
3.2.2. Evaluation by Shape Deviation Analysis
3.3. Discussion
4. Conclusions
- (1)
- For size segmentation, 199 2D human body measurement data points were used as sample data. Using the grid method technique, 18 size sections meeting the coverage rate of 4–7% each, and a total coverage rate of 90.5% were defined.
- (2)
- For the generation of the average human body model, 195 3D human body shape model data items were used as sample data, and a wireframe modeling technique based on body-section analysis was used to generate the average human body model for each of the 18 size sections.
- (3)
- For system development, 18 trunk and nine shank sections were produced as sizing subsystems by referring to the surface shapes of the generated 18 average human body models.
- (4)
- From the visual observation, a biased tendency of the shank-sizing system was identified. From the shape deviation analysis, all trunk and shank subsystems showed conformity of shape and dimensions at an appropriate level with a deviation range of 10 mm.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
References
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Division | Applicable Technique | Sample Data Type | |
---|---|---|---|
Size-section Segmentation | Grid method Clustering method Optimization method | 2D Human body measurement data | |
Average Human model generation | Modeling method utilization | Wireframe modeling | 3D Human body shape-model data |
Morphing modeling | |||
Database utilization | Template model fitting | Scan-template model-pair database |
Step | Content |
---|---|
1. Obtaining sample data | 2D human body measurement data are used. |
2. Selecting important variables | Three body measurements for body shape classification are selected as the important variables. |
3. Segmenting important variables into section | Important variables are segmented into section through a descriptive statistical analysis. |
4. Primary cross-tabulation analysis | Primary size sections are generated based on the important variables 1 and 2. |
5. Secondary cross-tabulation analysis | Final size sections are generated by applying the important variable 3 to the primary size sections. |
6. Forming the representative grid | Representative grid for each section is formed after generating the sample data into a 3D scatterplot. |
7. Generating size of important variables for each representative grid | Mean value of each important variable of the sample data included in each representative grid is calculated. |
Step | Content |
---|---|
1. Obtain sample models | 3D human body shape model data are used. |
2. Classify sample models | Sample models are classified based on the range of the section by the representative grid. |
3. Select template model | One template model is selected in the range of important variables ±10 mm for each representative grid. |
4. Select sample model | Based on the similarity to the template model, five sample models are selected for each representative grid. |
5. Body-section analysis | Body sections, including the body cross-sections, longitudinal-sections, and side seams of the five sample models, are extracted for each representative model. |
6. Generate average wireframe | Average body sections are generated by averaging each extracted section. |
An average wireframe is generated based on the average body sections. | |
7. Body cross-section modeling | To supplement the shape information between the cross-sections of the wireframe, body cross-section modeling is performed based on the template model, and the cross-section models are merged into one. |
Section | Height (mm) | Freq. | Hip Circumference (mm) | Freq. | Lower-Drop (mm) | Freq. |
---|---|---|---|---|---|---|
1 | 1542–1573 | 1 | 796–827 | 1 | 0–20 | 10 |
2 | 1573–1604 | 5 | 827–858 | 3 | 20–40 | 13 |
3 | 1604–1635 | 10 | 858–889 | 17 | 40–60 | 21 |
4 | 1635–1666 | 18 | 889–920 | 38 | 60–80 | 27 |
5 | 1666–1697 | 22 | 920–951 | 47 | 80–100 | 32 |
6 | 1697–1728 | 47 | 951–982 | 42 | 100–120 | 33 |
7 | 1728–1759 | 38 | 982–1013 | 30 | 120–140 | 26 |
8 | 1759–1790 | 32 | 1013–1044 | 10 | 140–160 | 19 |
9 | 1790–1821 | 13 | 1044–1075 | 8 | 160–180 | 14 |
10 | 1821–1852 | 13 | 1075–1106 | 3 | 180–199 | 4 |
Section of Hip Circumference | Total | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
Section of height | 1 | Freq. | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
total % | 0.0% | 0.0% | 0.5% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.5% | ||
2 | Freq. | 0 | 0 | 1 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 5 | |
total % | 0.0% | 0.0% | 0.5% | 1.0% | 0.0% | 1.0% | 0.0% | 0.0% | 0.0% | 0.0% | 2.5% | ||
3 | Freq. | 1 | 1 | 1 | 1 | 3 | 2 | 1 | 0 | 0 | 0 | 10 | |
total % | 0.5% | 0.5% | 0.5% | 0.5% | 1.5% | 1.0% | 0.5% | 0.0% | 0.0% | 0.0% | 5.0% | ||
4 | Freq. | 0 | 0 | 2 | 8 | 3 | 3 | 2 | 0 | 0 | 0 | 18 | |
total % | 0.0% | 0.0% | 1.0% | 4.0% | 1.5% | 1.5% | 1.0% | 0.0% | 0.0% | 0.0% | 9.0% | ||
5 | Freq. | 0 | 1 | 2 | 5 | 5 | 6 | 2 | 0 | 1 | 0 | 22 | |
total % | 0.0% | 0.5% | 1.0% | 2.5% | 2.5% | 3.0% | 1.0% | 0.0% | 0.5% | 0.0% | 11.1% | ||
6 | Freq. | 0 | 1 | 5 | 12 | 13 | 8 | 6 | 1 | 1 | 0 | 47 | |
total % | 0.0% | 0.5% | 2.5% | 6.0% | 6.5% | 4.0% | 3.0% | 0.5% | 0.5% | 0.0% | 23.6% | ||
7 | Freq. | 0 | 0 | 1 | 8 | 9 | 10 | 7 | 3 | 0 | 0 | 38 | |
total % | 0.0% | 0.0% | 0.5% | 4.0% | 4.5% | 5.0% | 3.5% | 1.5% | 0.0% | 0.0% | 19.1% | ||
8 | Freq. | 0 | 0 | 3 | 1 | 8 | 7 | 7 | 3 | 2 | 1 | 32 | |
total % | 0.0% | 0.0% | 1.5% | 0.5% | 4.0% | 3.5% | 3.5% | 1.5% | 1.0% | 0.5% | 16.1% | ||
9 | Freq. | 0 | 0 | 1 | 1 | 3 | 1 | 3 | 2 | 1 | 1 | 13 | |
total % | 0.0% | 0.0% | 0.5% | 0.5% | 1.5% | 0.5% | 1.5% | 1.0% | 0.5% | 0.5% | 6.5% | ||
10 | Freq. | 0 | 0 | 0 | 0 | 3 | 3 | 2 | 1 | 3 | 1 | 13 | |
total % | 0.0% | 0.0% | 0.0% | 0.0% | 1.5% | 1.5% | 1.0% | 0.5% | 1.5% | 0.5% | 6.5% | ||
total | Freq. | 1 | 3 | 17 | 38 | 47 | 42 | 30 | 10 | 8 | 3 | 199 | |
total % | 0.5% | 1.5% | 8.5% | 19.1% | 23.6% | 21.1% | 15.1% | 5.0% | 4.0% | 1.5% | 100.0% |
Section | Height (mm) | Hip Circumference (mm) | Freq. | Coverage Rate (%) |
---|---|---|---|---|
1 | 1573–1635 | 858–920 | 5 | 2.5 |
2 | 1573–1635 | 920–1013 | 8 | 4.0 |
3 | 1635–1666 | 858–920 | 10 | 5.0 |
4 | 1635–1666 | 920–1013 | 8 | 4.0 |
5 | 1666–1697 | 858–920 | 7 | 3.5 |
6 | 1666–1697 | 920–951 | 5 | 2.5 |
7 | 1666–1697 | 951–1013 | 8 | 4.0 |
8 | 1697–1728 | 858–889 | 5 | 2.5 |
9 | 1697–1728 | 889–920 | 12 | 6.0 |
10 | 1697–1728 | 920–951 | 13 | 6.5 |
11 | 1697–1728 | 951–982 | 8 | 4.0 |
12 | 1697–1728 | 982–1075 | 8 | 4.0 |
13 | 1728–1759 | 858–920 | 9 | 4.5 |
14 | 1728–1759 | 920–951 | 9 | 4.5 |
15 | 1728–1759 | 951–982 | 10 | 5.0 |
16 | 1728–1759 | 982–1044 | 10 | 5.0 |
17 | 1759–1790 | 858–920 | 4 | 2.0 |
18 | 1759–1790 | 920–951 | 8 | 4.0 |
19 | 1759–1790 | 951–982 | 7 | 3.5 |
20 | 1759–1790 | 982–1013 | 7 | 3.5 |
21 | 1759–1790 | 1013–1075 | 5 | 2.5 |
22 | 1790–1821 | 858–982 | 6 | 3.0 |
23 | 1790–1821 | 982–1075 | 6 | 3.0 |
24 | 1821–1852 | 920–982 | 6 | 3.0 |
25 | 1821–1852 | 982–1075 | 6 | 3.0 |
Total | 190 | 95.5 |
Section of Lower-Drop | Total | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
Section of height-hip circumference | 1 | Freq. | 0 | 0 | 0 | 1 | 0 | 2 | 1 | 1 | 0 | 0 | 5 |
total % | 0.0% | 0.0% | 0.0% | 0.5% | 0.0% | 1.1% | 0.5% | 0.5% | 0.0% | 0.0% | 2.6% | ||
2 | Freq. | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 8 | |
total % | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.0% | 0.0% | 4.2% | ||
3 | Freq. | 1 | 0 | 0 | 1 | 5 | 1 | 0 | 2 | 0 | 0 | 10 | |
total % | 0.5% | 0.0% | 0.0% | 0.5% | 2.6% | 0.5% | 0.0% | 1.1% | 0.0% | 0.0% | 5.3% | ||
4 | Freq. | 0 | 1 | 0 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 8 | |
total % | 0.0% | 0.5% | 0.0% | 1.6% | 1.6% | 0.5% | 0.0% | 0.0% | 0.0% | 0.0% | 4.2% | ||
5 | Freq. | 0 | 0 | 1 | 2 | 1 | 0 | 1 | 1 | 0 | 1 | 7 | |
total % | 0.0% | 0.0% | 0.5% | 1.1% | 0.5% | 0.0% | 0.5% | 0.5% | 0.0% | 0.5% | 3.7% | ||
6 | Freq. | 1 | 0 | 1 | 0 | 1 | 0 | 2 | 0 | 0 | 0 | 5 | |
total % | 0.5% | 0.0% | 0.5% | 0.0% | 0.5% | 0.0% | 1.1% | 0.0% | 0.0% | 0.0% | 2.6% | ||
7 | Freq. | 0 | 3 | 2 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 8 | |
total % | 0.0% | 1.6% | 1.1% | 0.0% | 0.5% | 1.1% | 0.0% | 0.0% | 0.0% | 0.0% | 4.2% | ||
8 | Freq. | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 1 | 0 | 5 | |
total % | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 1.6% | 0.5% | 0.5% | 0.0% | 2.6% | ||
9 | Freq. | 1 | 0 | 2 | 1 | 2 | 4 | 1 | 0 | 1 | 0 | 12 | |
total % | 0.5% | 0.0% | 1.1% | 0.5% | 1.1% | 2.1% | 0.5% | 0.0% | 0.5% | 0.0% | 6.3% | ||
10 | Freq. | 0 | 0 | 1 | 1 | 5 | 1 | 1 | 3 | 0 | 1 | 13 | |
total % | 0.0% | 0.0% | 0.5% | 0.5% | 2.6% | 0.5% | 0.5% | 1.6% | 0.0% | 0.5% | 6.8% | ||
11 | Freq. | 0 | 2 | 1 | 3 | 0 | 2 | 0 | 0 | 0 | 0 | 8 | |
total % | 0.0% | 1.1% | 0.5% | 1.6% | 0.0% | 1.1% | 0.0% | 0.0% | 0.0% | 0.0% | 4.2% | ||
12 | Freq. | 2 | 0 | 2 | 2 | 0 | 1 | 0 | 0 | 1 | 0 | 8 | |
total % | 1.1% | 0.0% | 1.1% | 1.1% | 0.0% | 0.5% | 0.0% | 0.0% | 0.5% | 0.0% | 4.2% | ||
13 | Freq. | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 3 | 0 | 9 | |
total % | 0.0% | 0.0% | 0.0% | 0.0% | 1.1% | 1.1% | 0.0% | 1.1% | 1.6% | 0.0% | 4.7% | ||
14 | Freq. | 0 | 0 | 0 | 1 | 2 | 1 | 2 | 0 | 3 | 0 | 9 | |
total % | 0.0% | 0.0% | 0.0% | 0.5% | 1.1% | 0.5% | 1.1% | 0.0% | 1.6% | 0.0% | 4.7% | ||
15 | Freq. | 0 | 1 | 0 | 4 | 1 | 1 | 3 | 0 | 0 | 0 | 10 | |
total % | 0.0% | 0.5% | 0.0% | 2.1% | 0.5% | 0.5% | 1.6% | 0.0% | 0.0% | 0.0% | 5.3% | ||
16 | Freq. | 3 | 1 | 1 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 10 | |
total % | 1.6% | 0.5% | 0.5% | 1.1% | 1.1% | 0.5% | 0.0% | 0.0% | 0.0% | 0.0% | 5.3% | ||
17 | Freq. | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 4 | |
total % | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.5% | 0.5% | 0.0% | 0.5% | 0.5% | 2.1% | ||
18 | Freq. | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 1 | 1 | 0 | 8 | |
total % | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 1.6% | 1.6% | 0.5% | 0.5% | 0.0% | 4.2% | ||
19 | Freq. | 0 | 0 | 2 | 0 | 2 | 1 | 1 | 1 | 0 | 0 | 7 | |
total % | 0.0% | 0.0% | 1.1% | 0.0% | 1.1% | 0.5% | 0.5% | 0.5% | 0.0% | 0.0% | 3.7% | ||
20 | Freq. | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 7 | |
total % | 0.0% | 0.0% | 0.0% | 1.1% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.0% | 3.7% | ||
21 | Freq. | 0 | 1 | 2 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 5 | |
total % | 0.0% | 0.5% | 1.1% | 0.0% | 0.5% | 0.0% | 0.0% | 0.5% | 0.0% | 0.0% | 2.6% | ||
22 | Freq. | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 0 | 1 | 0 | 6 | |
total % | 0.0% | 0.0% | 0.0% | 0.0% | 0.5% | 1.1% | 1.1% | 0.0% | 0.5% | 0.0% | 3.2% | ||
23 | Freq. | 0 | 0 | 3 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 6 | |
total % | 0.0% | 0.0% | 1.6% | 0.5% | 0.0% | 0.0% | 0.5% | 0.5% | 0.0% | 0.0% | 3.2% | ||
24 | Freq. | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 3 | 0 | 0 | 6 | |
total % | 0.0% | 0.0% | 0.0% | 0.5% | 0.0% | 1.1% | 0.0% | 1.6% | 0.0% | 0.0% | 3.2% | ||
25 | Freq. | 0 | 1 | 0 | 1 | 1 | 2 | 1 | 0 | 0 | 0 | 6 | |
total % | 0.0% | 0.5% | 0.0% | 0.5% | 0.5% | 1.1% | 0.5% | 0.0% | 0.0% | 0.0% | 3.2% | ||
total | Freq. | 9 | 11 | 19 | 27 | 32 | 32 | 25 | 19 | 13 | 3 | 190 | |
total % | 4.7% | 5.8% | 10.0% | 14.2% | 16.8% | 16.8% | 13.2% | 10.0% | 6.8% | 1.6% | 100.0% |
Section | Height (Mm) | Hip Circumference (Mm) | Lower-Drop (Mm) | Freq. | Coverage Rate (%) |
---|---|---|---|---|---|
1 | 1573–1635 | 858–1013 | 0–180 | 10 | 5.0 |
2 | 1635–1666 | 858–920 | 0–180 | 10 | 5.0 |
3 | 1635–1666 | 920–1013 | 0–180 | 8 | 4.0 |
4 | 1666–1697 | 858–1013 | 0–80 | 10 | 5.0 |
5 | 1666–1697 | 858–1013 | 80–180 | 9 | 4.5 |
6 | 1697–1728 | 858–1075 | 0–60 | 11 | 5.5 |
7 | 1697–1728 | 858–951 | 60–120 | 14 | 7.0 |
8 | 1697–1728 | 858–951 | 120–180 | 11 | 5.5 |
9 | 1697–1728 | 951–1075 | 60–180 | 9 | 4.5 |
10 | 1728–1759 | 858–982 | 0–100 | 11 | 5.5 |
11 | 1728–1759 | 982–1044 | 0–100 | 9 | 4.5 |
12 | 1728–1759 | 858–1044 | 100–140 | 10 | 5.0 |
13 | 1728–1759 | 858–1044 | 140–180 | 8 | 4.0 |
14 | 1759–1790 | 858–982 | 0–120 | 9 | 4.5 |
15 | 1759–1790 | 858–982 | 120–180 | 9 | 4.5 |
16 | 1759–1790 | 982–1075 | 0–180 | 12 | 6.0 |
17 | 1790–1821 | 858–1075 | 0–180 | 12 | 6.0 |
18 | 1821–1852 | 920–1075 | 0–180 | 8 | 4.0 |
Total | 180 | 90.5 |
Section | Height (Mm) | Hip Circumference (Mm) | Lower-Drop (Mm) |
---|---|---|---|
1 | 1618 | 945 | 87 |
2 | 1651 | 902 | 95 |
3 | 1652 | 959 | 76 |
4 | 1679 | 942 | 46 |
5 | 1681 | 930 | 115 |
6 | 1714 | 964 | 35 |
7 | 1712 | 925 | 94 |
8 | 1712 | 903 | 145 |
9 | 1712 | 983 | 93 |
10 | 1741 | 950 | 75 |
11 | 1739 | 1009 | 48 |
12 | 1738 | 941 | 118 |
13 | 1739 | 915 | 165 |
14 | 1768 | 945 | 90 |
15 | 1772 | 927 | 142 |
16 | 1772 | 1013 | 99 |
17 | 1803 | 971 | 104 |
18 | 1836 | 980 | 120 |
Gender | Age (Year) | Height (cm) | Weight (kg) | Injury Level | ASIA Scale | Onset (Year) | |
---|---|---|---|---|---|---|---|
Sub1 | male | 65 | 163 | 53 | T10 | A | 2006 |
Sub2 | male | 48 | 163 | 66 | L1 | C | 2004 |
Sub3 | male | 54 | 165 | 74 | T10 | A | 2005 |
Sub4 | male | 47 | 170 | 80 | L1 | A | 2015 |
Sub5 | male | 64 | 168 | 70 | C7 | C | 2011 |
Sub6 | male | 60 | 168 | 86 | T8 | A | 2006 |
Sub7 | male | 58 | 176 | 72 | T10 | A | 2007 |
Sub8 | male | 52 | 171 | 64 | T12 | A | 2001 |
Sub9 | male | 52 | 175 | 66.2 | T11 | A | 2013 |
Sub10 | male | 53 | 180 | 78 | T11 | A | 1992 |
Sub1 | Sub2 | Sub3 | Sub4 | Sub5 | Sub6 | Sub7 | Sub8 | Sub9 | Sub10 | |
---|---|---|---|---|---|---|---|---|---|---|
Trunk section | 10 | 5 | 6 | 9 | 4 | 16 | 16 | 5 | 4 | 9 |
Shank section | 5 | 14 | 7 | 10 | 7 | 7 | 7 | 2 | 7 | 2 |
Sub1 | Sub2 | Sub3 | Sub4 | Sub5 | Sub6 | Sub7 | Sub8 | Sub9 | Sub10 | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Trunk pHRI | Mean | 5.44 | 4.20 | 6.83 | 9.32 | 4.10 | 5.37 | 7.32 | 4.54 | 4.52 | 8.12 |
SD | 5.26 | 4.73 | 7.22 | 9.17 | 4.72 | 4.23 | 4.57 | 5.00 | 6.03 | 7.65 | |
Shank pHRI | Mean | 4.94 | 2.91 | 3.71 | 3.27 | 1.90 | 2.39 | 2.54 | 2.72 | 2.56 | 7.58 |
SD | 5.04 | 4.30 | 4.04 | 3.97 | 2.30 | 3.08 | 3.24 | 3.10 | 3.24 | 4.66 |
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Kwon, C.-Y.; Jang, J.-S.; Kim, G.-S. A 3D Printed Physical Human–Robot Interface Based on a Sizing System to Facilitate Customization: Wearable Robots for Paraplegia. Appl. Sci. 2021, 11, 5143. https://0-doi-org.brum.beds.ac.uk/10.3390/app11115143
Kwon C-Y, Jang J-S, Kim G-S. A 3D Printed Physical Human–Robot Interface Based on a Sizing System to Facilitate Customization: Wearable Robots for Paraplegia. Applied Sciences. 2021; 11(11):5143. https://0-doi-org.brum.beds.ac.uk/10.3390/app11115143
Chicago/Turabian StyleKwon, Chil-Yong, Jung-Sik Jang, and Gyoo-Suk Kim. 2021. "A 3D Printed Physical Human–Robot Interface Based on a Sizing System to Facilitate Customization: Wearable Robots for Paraplegia" Applied Sciences 11, no. 11: 5143. https://0-doi-org.brum.beds.ac.uk/10.3390/app11115143