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Multipoint-Detection Strain Sensor with a Single Electrode Using Optical Ultrasound Generated by Carbon Nanotubes.
Sensors (Basel). 2019 Sep 09; 19(18)S

Abstract

With the development of wearable devices, strain sensors have attracted large interest for the detection of human motion, movement, and breathing. Various strain sensors consisting of stretchable conductive materials have been investigated based on resistance and capacitance differences according to the strain. However, this method requires multiple electrodes for multipoint detection. We propose a strain sensor capable of multipoint detection with a single electrode, based on the ultrasound pulse-echo method. It consists of several transmitters of carbon nanotubes (CNTs) and a single polyvinylidene fluoride receiver. The strain sensor was fabricated using CNTs embedded in stretchable polydimethylsiloxane. The received data are characterized by the different times of transmission from the CNTs of each point depending on the strain, i.e., the sensor can detect the positions of the CNTs. This study demonstrates the application of the multipoint strain sensor with a single electrode for measurements up to a strain of 30% (interval of 1%). We considered the optical and acoustic energy losses in the sensor design. In addition, to evaluate the utility of the sensor, finger bending with three-point CNTs and flexible phantom bending with six-point CNTs for the identification of an S-curve having mixed expansion and compression components were carried out.

Authors+Show Affiliations

Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea. cwy1533@hanyang.ac.kr.Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea. sjdf5702@hanyang.ac.kr.Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea. rnjstndnjs@hanyang.ac.kr.Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea. jason401@hanyang.ac.kr.Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea. juyoung@hanyang.ac.kr.Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea. kwankyu@hanyang.ac.kr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31505727

Citation

Choi, Won Young, et al. "Multipoint-Detection Strain Sensor With a Single Electrode Using Optical Ultrasound Generated By Carbon Nanotubes." Sensors (Basel, Switzerland), vol. 19, no. 18, 2019.
Choi WY, Jo HG, Kwon SW, et al. Multipoint-Detection Strain Sensor with a Single Electrode Using Optical Ultrasound Generated by Carbon Nanotubes. Sensors (Basel). 2019;19(18).
Choi, W. Y., Jo, H. G., Kwon, S. W., Kim, Y. H., Pyun, J. Y., & Park, K. K. (2019). Multipoint-Detection Strain Sensor with a Single Electrode Using Optical Ultrasound Generated by Carbon Nanotubes. Sensors (Basel, Switzerland), 19(18). https://doi.org/10.3390/s19183877
Choi WY, et al. Multipoint-Detection Strain Sensor With a Single Electrode Using Optical Ultrasound Generated By Carbon Nanotubes. Sensors (Basel). 2019 Sep 9;19(18) PubMed PMID: 31505727.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multipoint-Detection Strain Sensor with a Single Electrode Using Optical Ultrasound Generated by Carbon Nanotubes. AU - Choi,Won Young, AU - Jo,Hyeong Geun, AU - Kwon,Soo Won, AU - Kim,Young Hun, AU - Pyun,Joo Young, AU - Park,Kwan Kyu, Y1 - 2019/09/09/ PY - 2019/07/30/received PY - 2019/08/22/revised PY - 2019/09/07/accepted PY - 2019/9/12/entrez PY - 2019/9/12/pubmed PY - 2020/1/29/medline KW - carbon nanotube KW - multipoint detection KW - photoacoustic KW - strain sensor KW - stretchable JF - Sensors (Basel, Switzerland) JO - Sensors (Basel) VL - 19 IS - 18 N2 - With the development of wearable devices, strain sensors have attracted large interest for the detection of human motion, movement, and breathing. Various strain sensors consisting of stretchable conductive materials have been investigated based on resistance and capacitance differences according to the strain. However, this method requires multiple electrodes for multipoint detection. We propose a strain sensor capable of multipoint detection with a single electrode, based on the ultrasound pulse-echo method. It consists of several transmitters of carbon nanotubes (CNTs) and a single polyvinylidene fluoride receiver. The strain sensor was fabricated using CNTs embedded in stretchable polydimethylsiloxane. The received data are characterized by the different times of transmission from the CNTs of each point depending on the strain, i.e., the sensor can detect the positions of the CNTs. This study demonstrates the application of the multipoint strain sensor with a single electrode for measurements up to a strain of 30% (interval of 1%). We considered the optical and acoustic energy losses in the sensor design. In addition, to evaluate the utility of the sensor, finger bending with three-point CNTs and flexible phantom bending with six-point CNTs for the identification of an S-curve having mixed expansion and compression components were carried out. SN - 1424-8220 UR - https://www.unboundmedicine.com/medline/citation/31505727/Multipoint_Detection_Strain_Sensor_with_a_Single_Electrode_Using_Optical_Ultrasound_Generated_by_Carbon_Nanotubes_ L2 - http://www.mdpi.com/resolver?pii=s19183877 DB - PRIME DP - Unbound Medicine ER -