Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays
Over the years, several bare metal and crack-based strain sensors have been proposed for various fields of science and technology. However, due to their low gauge factor, metal-based strain sensors have limited practical applications. The crack-based strain sensor, on the other hand, demonstrated ex...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/1/62 |
| _version_ | 1797438679479746560 |
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| author | Jongsung Park Dong-Su Kim Youngsam Yoon Arunkumar Shanmugasundaram Dong-Weon Lee |
| author_facet | Jongsung Park Dong-Su Kim Youngsam Yoon Arunkumar Shanmugasundaram Dong-Weon Lee |
| author_sort | Jongsung Park |
| collection | DOAJ |
| description | Over the years, several bare metal and crack-based strain sensors have been proposed for various fields of science and technology. However, due to their low gauge factor, metal-based strain sensors have limited practical applications. The crack-based strain sensor, on the other hand, demonstrated excellent sensitivity and a high gauge factor. However, the crack-based strain sensor exhibited non-linear behavior at low strains, severely limiting its real-time applications. Generally, the crack-based strain sensors are fabricated by generating cracks by bending a polymer film on which a metal layer has been deposited with a constant curvature. However, the random formation of cracks produces nonlinear behavior in the crack sensors. To overcome the limitations of the current state of the art, we propose a V-groove-based metal strain sensor for human motion monitoring and Morse code generation. The V-groove crack-based strain sensor is fabricated on polyurethane acrylate (PUA) using the modified photolithography technique. During the procedure, a V-groove pattern formed on the surface of the sensor, and a uniform crack formed over the entire surface by concentrating stress along the groove. To improve the sensitivity and selectivity of the sensor, we generated the cracks in a controlled direction. The proposed strain sensor exhibited high sensitivity and excellent fidelity compared to the other reported metal strain sensors. The gauge factor of the proposed V-groove-induced crack sensor is 10-fold higher than the gauge factor of the reported metal strain sensors. In addition, the fabricated V-groove-based strain sensor exhibited rapid response and recovery times. The practical feasibility of the proposed V-groove-induced crack-based strain sensor is demonstrated through human motion monitoring and the generation of Morse code. The proposed V-groove crack sensor can detect multiple motions in a variety of human activities and is anticipated to be utilized in several applications due to its high durability and reproducibility. |
| first_indexed | 2024-03-09T11:41:44Z |
| format | Article |
| id | doaj.art-ab6ea39a3758456fb3f5a3bf14f0864e |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T11:41:44Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-ab6ea39a3758456fb3f5a3bf14f0864e2023-11-30T23:32:42ZengMDPI AGMicromachines2072-666X2022-12-011416210.3390/mi14010062Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove ArraysJongsung Park0Dong-Su Kim1Youngsam Yoon2Arunkumar Shanmugasundaram3Dong-Weon Lee4Department of Precision Mechanical Engineering, Kyungpook National University, Sangju 37224, Republic of KoreaSchool of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of KoreaDepartment of Electrical Engineering, Korea Military Academy, Seoul 01805, Republic of KoreaSchool of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of KoreaSchool of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of KoreaOver the years, several bare metal and crack-based strain sensors have been proposed for various fields of science and technology. However, due to their low gauge factor, metal-based strain sensors have limited practical applications. The crack-based strain sensor, on the other hand, demonstrated excellent sensitivity and a high gauge factor. However, the crack-based strain sensor exhibited non-linear behavior at low strains, severely limiting its real-time applications. Generally, the crack-based strain sensors are fabricated by generating cracks by bending a polymer film on which a metal layer has been deposited with a constant curvature. However, the random formation of cracks produces nonlinear behavior in the crack sensors. To overcome the limitations of the current state of the art, we propose a V-groove-based metal strain sensor for human motion monitoring and Morse code generation. The V-groove crack-based strain sensor is fabricated on polyurethane acrylate (PUA) using the modified photolithography technique. During the procedure, a V-groove pattern formed on the surface of the sensor, and a uniform crack formed over the entire surface by concentrating stress along the groove. To improve the sensitivity and selectivity of the sensor, we generated the cracks in a controlled direction. The proposed strain sensor exhibited high sensitivity and excellent fidelity compared to the other reported metal strain sensors. The gauge factor of the proposed V-groove-induced crack sensor is 10-fold higher than the gauge factor of the reported metal strain sensors. In addition, the fabricated V-groove-based strain sensor exhibited rapid response and recovery times. The practical feasibility of the proposed V-groove-induced crack-based strain sensor is demonstrated through human motion monitoring and the generation of Morse code. The proposed V-groove crack sensor can detect multiple motions in a variety of human activities and is anticipated to be utilized in several applications due to its high durability and reproducibility.https://www.mdpi.com/2072-666X/14/1/62polyurethane-acrylate (PUA)crack-based strain sensorhigh sensitivityexcellent fidelityhuman motion monitoring |
| spellingShingle | Jongsung Park Dong-Su Kim Youngsam Yoon Arunkumar Shanmugasundaram Dong-Weon Lee Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays Micromachines polyurethane-acrylate (PUA) crack-based strain sensor high sensitivity excellent fidelity human motion monitoring |
| title | Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays |
| title_full | Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays |
| title_fullStr | Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays |
| title_full_unstemmed | Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays |
| title_short | Crack-Based Sensor by Using the UV Curable Polyurethane-Acrylate Coated Film with V-Groove Arrays |
| title_sort | crack based sensor by using the uv curable polyurethane acrylate coated film with v groove arrays |
| topic | polyurethane-acrylate (PUA) crack-based strain sensor high sensitivity excellent fidelity human motion monitoring |
| url | https://www.mdpi.com/2072-666X/14/1/62 |
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