A Mixed Reality-Based Platform towards Human-Cyber-Physical Systems with IoT Wearable Device for Occupational Safety and Health Training
Abstract
:1. Introduction
1.1. Wearable Hand Device
1.2. Mixed Reality
1.3. Occupational Safety and Health Training
1.4. Problem Description and Objectives
- How could an MR-based environment be assisted for OSH training?
- How could HCPS be adopted for OSH training under an MR-based environment?
2. Theoretical Background and Related Works
2.1. IoT-Based Occupational Safety and Health
2.2. CPS-Based Occupational Safety and Health
2.3. Types of Hand Wearable Device
Hand Wearable Devices Related to Safety and Health
2.4. Research Gap
3. System Architecture and Methodology
3.1. Human–Cyber–Physical System
3.2. Wearable Hand Device
3.3. Multi-Criteria Decision Making (MCDM)
Fuzzy Analytic Hierarchy Process (FAHP)
4. Results and Discussion
4.1. Programming
4.2. Experiments
- ○
- Wear the glove and perform three finger positions: flat, 90-degree bends, and 180-degree bends. Record the raw readings of these three positions.
- ○
- Analyze the raw readings and interpret them into angles logically.
- ○
- Develop a program to perform the interpretation using the logic developed.
5. Concluding Remarks
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Gender | Average Length | Average Breadth |
---|---|---|
Male | 18.9 cm | 8.4 cm |
Female | 17.2 cm | 7.4 cm |
Sensor Type | Usage | Relationship with Project |
---|---|---|
Temperature sensors |
| Track trainer’s skin temperature |
Position sensors |
| Track the movement of fingers, such as bending |
Motion sensors [104] |
| Track trainer’s gesture during work (formal gesture or not) |
Force sensors [104] |
| Track trainer’s applied force to the glove |
Accelerometer with gyroscope [105] |
| Track the position of the whole hand |
Cost | Comfortability | Processability | Flexibility | |
---|---|---|---|---|
Cost | 1 | 5 | 4 | 7 |
Comfortability | 1 | 3 | ||
Processability | 2 | 1 | 3 | |
Flexibility | 1 |
1 | 2 | 3 | 4 | |
---|---|---|---|---|
Attribute or criteria | Cost | Comfortability | Processability | Flexibility |
Numeric Value | Fuzzy Number | |
---|---|---|
Equal | 1 | (1,1,1) |
Moderate | 3 | (2,3,4) |
Strong | 5 | (4,5,6) |
Very strong | 7 | (6,7,8) |
Extremely strong | 9 | (9,9,9) |
Intermediate values | 2 | (1,2,3) |
4 | (3,4,5) | |
6 | (5,6,7) | |
8 | (7,8,9) |
Price or Cost | Storage Space | Camera | Looks | |
---|---|---|---|---|
Cost | 1 | 5 | 4 | 7 |
Comfortability | 1 | 3 | ||
Processability | 2 | 1 | 3 | |
Flexibility | 1 | |||
Price or cost | Storage Space | Camera | Looks | |
Cost | (1,1,1) | (4,5,6) | (3,4,5) | (6,7,8) |
Comfortability | (1,1,1) | (2,3,4) | ||
Processability | (1,2,3) | (1,1,1) | (2,3,4) | |
Flexibility | (1,1,1) |
Price or Cost | Storage Space | Camera | Looks | The Fuzzy Geometric Mean Value | Fuzzy Weights | |
---|---|---|---|---|---|---|
Cost | (1,1,1) | (4,5,6) | (3,4,5) | (6,7,8) | (2.91, 3.44, 3.94) | (0.428, 0.610, 0.859) |
Comfortability | () | (1,1,1) | () | (2,3,4) | (0.58, 0.74, 1) | (0.085, 0.131, 0.218) |
Processability | () | (1,2,3) | (1,1,1) | (2,3,4) | (0.80, 1.11, 1.41) | (0.117, 0.196, 0.309) |
Flexibility | () | () | () | (1,1,1) | (0.30, 0.35, 0.45) | (0.044, 0.063, 0.099) |
Fuzzy Weights | Weights wi | |
---|---|---|
Cost | (0.428, 0.610, 0.859) | 0.633 |
Comfortability | (0.085, 0.131, 0.218) | 0.145 |
Processability | (0.117, 0.196, 0.309) | 0.207 |
Flexibility | (0.044, 0.063, 0.099) | 0.068 |
Weights wi | Normalized weights | |
Cost | 0.633 | = 0.601 |
Comfortability | 0.145 | = 0.138 |
Processability | 0.207 | = 0.197 |
Flexibility | 0.068 | = 0.065 |
Total | 0.633 + 0.145 + 0.207 + 0.068 = 1.058 | 0.601 + 0.138 + 0.197 + 0.065 = 1 |
Linguistic Terms | Spherical Fuzzy Number |
---|---|
Extremely low | [0.045, 0.955 0.045] |
Very low | [0.135, 0.865 0.135] |
Low | [0.255, 0.745 0.255] |
Fair | [0.335, 0.665 0.335] |
Medium | [0.410, 0.590 0.410] |
Good | [0.500, 0.500 0.500] |
Very good | [0.590, 0.410 0.410] |
High | [0.665, 0.335 0.335] |
Very high | [0.745, 0.255 0.255] |
Exceptionally high | [0.865, 0.135 0.135] |
Excellent | [0.955, 0.045 0.045] |
Finger Angle (FA) | Raw Reading Boundary |
---|---|
0-degree | less than 1500 |
90-degree | less than 3500 |
180-degree | less than 4000 |
1 | //Flex Loop |
2 | int Flex = analogRead(Flex_Pin); |
3 | //Serial.print(“Flex: “); |
4 | //Serial.println(Flex); |
5 | int FA = 0; |
6 | if (Flex ≤ 1500){ |
7 | FA = 0;} |
8 | else if (Flex ≤ 3500){ |
9 | FA = (Flex − 1500)/(2000/90);} |
10 | else if (Flex ≤ 4000){ |
11 | FA = (Flex − 3500)/(500/90);} |
12 | else{ |
13 | FA = 180;} |
14 | Serial.print(“Flex: ”) |
15 | Serial.print(FA); |
16 | Serial.println(“ degree”); |
Traditional | Mixed Reality Platform | |
---|---|---|
Accuracy | ||
Acceleration and coordinate | 92.50% | 95.00% |
Finger bending | 94.00% | 95.50% |
Confirm button | 97.00% | 97.75% |
Errors ratio | ||
Acceleration and coordinate | 13.25% | 11.25% |
Finger bending | 5.00% | 4.25% |
Confirm Button | 0.25% | 0.20% |
Processing time | ||
Acceleration and Coordinate | 8.00 ± 3.0 s | 13.00 ± 5.0 s |
Finger bending | 5.00 ± 2.0 s | 7.00 ± 2.5 s |
Confirm Button | 2.00 ± 1.0 s | 2.50 ± 1.5 s |
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Li, C.H.J.; Liang, V.; Chow, Y.T.H.; Ng, H.-Y.; Li, S.-P. A Mixed Reality-Based Platform towards Human-Cyber-Physical Systems with IoT Wearable Device for Occupational Safety and Health Training. Appl. Sci. 2022, 12, 12009. https://doi.org/10.3390/app122312009
Li CHJ, Liang V, Chow YTH, Ng H-Y, Li S-P. A Mixed Reality-Based Platform towards Human-Cyber-Physical Systems with IoT Wearable Device for Occupational Safety and Health Training. Applied Sciences. 2022; 12(23):12009. https://doi.org/10.3390/app122312009
Chicago/Turabian StyleLi, Chi Ho Jimmy, Vincy Liang, Yuk Ting Hester Chow, Hiu-Yin Ng, and Shek-Ping Li. 2022. "A Mixed Reality-Based Platform towards Human-Cyber-Physical Systems with IoT Wearable Device for Occupational Safety and Health Training" Applied Sciences 12, no. 23: 12009. https://doi.org/10.3390/app122312009