Efficient Placement of Pressure Sensors of a Sitting Cushion Stitched by Conductive Thread for Sitting Position

Byung Hyun Moon, Jeong Tak Ryu

Abstract


In this paper, efficient placement of pressure sensors is tested for correct posture under sitting cushion using conductive thread to connect the pressure sensors. Conductive thread Ada-641 from the Adafruit industries is used to connect sensors for the sitting cushion. In order to detect the correct sitting postures, an Arduino-based cushion seat with 16 pressure sensors is implemented. A conductive thread connects the sensors to accommodate the comfort of the sitting cushion. In order to test the efficient placement of the pressure sensors, several types of sensor locations are suggested to identify sitting postures. The least number of sensors included for a given type of pressure sensor location is four. Sitting posture detection with 8 and 12 sensors is also tested. The maximum number of sensors included in the experiment is 16. The efficient placement of the sensors is decided by comparing the detection probability of the correct sitting posture for a different number of sensors included in the sitting posture test. It is shown that the correct sitting posture can be detected 100% by using 8 sensors out of 16 sensors. The test results show a guideline for the minimum number of sensors required for reliable, correct posture detection. It is also shown that the performance of the sitting cushion with conductive thread type sensors is as good as the one with the copper wire connection.


Keywords


Conductive thread; pressure sensor; sitting positions.

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References


S. Ahn, Y. Jeong, D. Kim, and H. Kim, "Development of the non-wearable system with FSR sensors for correction of sitting position," 2015 Second International Conference on Computing Technology and Information Management (ICCTIM), 2015, pp. 140–143.

Y. Huang and X. Ouyangl, "Sitting posture detection and recognition using force sensor," 2012 5th International Conference on Biomedical Engineering and Informatics, 2012, pp.1117–1122.

A. Ishaku and et.el, "Flexible force sensors embedded in office chair for monitoring sitting position," 2019 International Conference on Flexible and Printable Sensors and system(FLEPS), 2019

Y. Taguchi and et.el, "Sensitive cushion based hetro-core fiber optics for unconstraint sitting posture monitoring," 2014 IEEE 3rd International Conference on Consumer Electronics(GCCE), 2014, pp. 640-642.

T. Fu and A. MacLeod, "Intellichair: An approach for activity detection and prediction via posture analysis," 2014 International Conference on Intelligent Environment, 2014, pp. 211-213.

A. Shafti, R. Manero, A Borg, K. Althoefer and M. Howard, "Designing embroidered electrodes for wearable surface electromyography," 2016 IEEE International Conference on Robotics and Automation (ICRA), 2016, pp. 172-177.

V. Misha and A. Kiourti, "Electromagnetic components realised on conductive wires: a copper vs. E-thread comparison," 2019 IEEE International Symposium on Antenna and Propagation and USNC-URSI Radio Science Meeting, 2019, pp. 359- 360.

A. Noda and H. shinoda, "Frequency-division-multiplexing signal and power transfer for wearable devices networked via conductive embroideries on a cloth," IEEE MTT-S International Microwave Symposium (IMS), 2017, pp. 537-540.

Y. Masuda, A. Noda and H. Shinoda, "Power aggregation from multiple energy harvesting devices via a conductive embroidered choth," Proceedings of IEEE/SICE International Symposium on System Integration, 2017, pp. 553-558.

Y. Masuda, A. Noda and H. Shinoda, "Whole body human power-based energy harvesting using a conductive embroidered cloth and a power aggregation circuit" IEEE 15th International Conference on Wearable and Implantable Body Sensor Networks (BSN), 2018, pp. 214-217.

J. Vincent and J. Rispoli, "Stitching stretchable radio frequency coils for MRI: A conductive thread and athletic fabric approach," Proceeding of 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019, pp. 6798-6801.

A. Fleury, M. Cohen-McFarlane, Y. Ling and T. Chau, "Predicting linear elongation with conductive thread-based sensors," IEEE Sensors Journal, Vol. 17, No. 20, 2017, pp. 6537-6548.

T. Agcayazi, M. Yokus, M. Gordon, T. Ghosh and A. Bozkurt, "A stitched textile-based capacitive respiration sensor," 2017 IEEE SENSORS, 2017.

M. Baima and T. L. Andrew, "Fluoropolymer-wrapped conductive threads for textile touch sensors operating via the triboelectric effect," Fibers, vol. 6, no. 41. 2018.

E. W. Foo, R. M. T. Pettys-baker, S. Sullivan, L. E. Dunne, and S. Paul, "Garment-integrated wetness sensing for leak detection," in ISWC, 2017, pp. 26-33.

R. White, M. Mcnight, J. Tabor, T. Agcayazi, T. Ghosh and A. Bozkurt, "A wetness detection technique towards sclable, array-based, fully-textile sensing, in IEEE Biomedical Circuits and Systems Conference, 2018.

Y. Jiang, K. Pan, T. Leung and Z. Hu, "Smart textile integrated wireless powered near field communication (NFC) body temperature and sweat sensing system, "IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, 2019.

M. McKnight, J. Tabor, T. Agcayazi, A. Gleming, T. Ghosh, H. Hunag, and A. Bozkurt, "Fully-textile insole seam-line for multi-modal sensor mapping," IEEE Sensors Journal, 2020.

T. Grethe, S. Borczyk, K. Plenkmann, M. Normann, M. Rabe, A. Schwarz-Preiffer, "Textile humidity sensors", 2018 Symposium on Design, Test, Integration & Packaging of MEMs and MOEMS, 2018.

M. McKnight, T. Agcyyazi, H. Kausche, T. Chosh, A. Bozkurt," Sensing textile seam-line for wearable multimodal physiological monitoring," 38th Annual International Conference of the IEEE Engineering in Medical and Biology Society (EMBC), 2016, pp. 311-314.




DOI: http://dx.doi.org/10.18517/ijaseit.11.2.12997

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