Top > JRM > Excretion Detection System with Gas Sensor – Proposal an ...

single-rb.php

JRM Vol.29 No.2 pp. 353-363
doi: 10.20965/jrm.2017.p0353
(2017)

Development Report:

Views over last 60 days: 1,491

Excretion Detection System with Gas Sensor – Proposal and Verification of Algorithm Based on Time-Series Clustering –

Yoshimi Ui*, Yutaka Akiba**, Shohei Sugano**, Ryosuke Imai**, and Ken Tomiyama***

*aba Inc.
3-30-5 Maebara-Higashi, Funabashi, Chiba 274-0824, Japan

**Chiba Institute of Technology
2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan

***Future Robotics Technology Center (fuRo), Chiba Institute of Technology
2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan

Received:
September 30, 2016
Accepted:
February 6, 2017
Published:
April 20, 2017
Creative Commons License
Keywords:
excretion, care, gas sensor, clustering, non-wearing
Abstract
In this study, we propose an excretion detection system, Lifi, which does not require sensors inside diapers, and we verify its capabilities. It consists of a sheet with strategically placed air intakes, a set of gas sensors, and a processing unit with a newly developed excretion detection algorithm. The gas sensor detects chemicals with odor in the excrement, such as hydrogen sulfide and urea. The time-series data from the gas sensor was used for the detection of not only excretion, but also of the presence/absence of the cared person on the bed. We examined two algorithms, one with a simple threshold and another based on the clustering of sensor data, obtained using the k-means method. The results from both algorithms were satisfactory and similar, once the algorithms were customized for each cared person. However, we adopted the clustering algorithm because it possesses a higher level of flexibility that can be explored and exploited. Lifi was conceived from an overwhelming and serious desire of caretakers to discover the excretion of bed-ridden cared persons, without opening their diapers. We believe that Lifi, along with the clustering algorithm, can help caretakers in this regard.
Standard Lifilm configuration

Standard Lifilm configuration

Cite this article as:
Y. Ui, Y. Akiba, S. Sugano, R. Imai, and K. Tomiyama, “Excretion Detection System with Gas Sensor – Proposal and Verification of Algorithm Based on Time-Series Clustering –,” J. Robot. Mechatron., Vol.29 No.2, pp. 353-363, 2017.
Data files:
References
  1. [1] T. Itakura, M. Mitsuda, and T. Tanamura, “Research on Characteristics of the Odors from Excrement at the Adult Diaper Exchange,” J. Environ. Engr. Architectural Institute of Japan, Vol.73, No.625, pp. 335-341, 2008 (in Japanese).
  2. [2] J. MacQueen, “Some methods for classification and analysis of multivariate observations,” Proc. Fifth Berkeley Symp. on Math. Statist. and Prob., Vol.1, pp. 281-297, University of California Press, 1967.
  3. [3] S. Okada, K. Hitomi, N. Chandrasiri, Y. Rho, and K. Nitta, “Analysis of driving behavior based on time-series data mining of vehicle sensor data,” Forum on Information Technology FIT2012, 2012 (in Japanese).
  4. [4] T. Ueda, H. Sugimura, K. Matsumoto, and M. Isshiki, “Activity Recognition of the Human from Sensor Data,” The 27th Annual Conf. of the Japanese Society for Artificial Intelligence, 2013 (in Japanese).
  5. [5] Y. Douguchi, Y. Yonezawa, and Y. Yamada, “Development of the sensor system for defecation,” Heisei 11 Research Report, Industrial Research Institute of Ishikawa, 2000 (in Japanese).
  6. [6] T. Mizukawa, M. Tahashi, M. Kawashima, and H. Goto, “Development of urination/defecation detector using gas sensor (Poster Presentation),” IEICE Tech. Rep., Vol.115, No.152, WBS2015-13, MICT2015-17, pp. 1-5, July 2015 (in Japanese).
  7. [7] T. Tamura, K. Nakajima et al., “A warning detector for urinary incontinence for home health care,” Biomed Instrumentation Technology, Vol.29, No.4, pp. 343-349, 1995.
  8. [8] M. A. Ziai and J. C. Batchelo, “Smart radio-frequency identification tag for diaper moisture detection,” Healthcare Technology Letters, Vol.2, No.1, pp. 18-21, 2015.
  9. [9] T. Nakamura, “Method of detecting urination and defecation in using paper diaper and the like,” Japan Patent, JP2002-233548A, 2002-08-20, 2002.
  10. [10] M. Tsuruhara and C. Sekine, “Device for detecting urine and feces in diaper,” WO Patent, WO2011162402A1, 2011-12-29, 2011.
  11. [11] T. Urabe, “Defecation detector,” Japan Patent, JP2002143213A, 2001-10-17, 2001.
  12. [12] Y. Abe, I. Fukuda et al., “Excretion detector,” Japan Patent, JP2002159523A, 2002-06-04, 2002.
  13. [13] H. Fuketa, K. Yoshioka et al., “Organic-transistor-based 2kV ESD-tolerant flexible wet sensor sheet for biomedical applications with wireless power and data transmission using 13.56MHz magnetic resonance,” Proc., 2014 IEEE Int. Solid-State Circuits Conf., pp. 490-491, 2014.
  14. [14] N. Matsumoto, “Noncontact Excretion Detection Sheet Liflm – Construction of The Excretion Detection Algorithm –,” Graduation Thesis, Chiba Institute of Technology, 2014 (in Japanese).

Creative Commons License  This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.

*This site is desgined based on HTML5 and CSS3 for modern browsers, e.g. Chrome, Firefox, Safari, Edge, Opera.

Last updated on Oct. 01, 2024