Browse > Article
http://dx.doi.org/10.7471/ikeee.2012.16.1.034

High Accurate Creep Compensation of the Loadcell using the Strain Gauge  

Seo, Hae-Jun (School of Electronics Engineering, Chungbuk University)
Jung, Haing-Sup (Department of Electronics Engineering, Cheongju University)
Ryu, Gi-Ju (Department of Communication Electronics, Seoul Kangseo College, Korea Foundation of Polytechnic Colleges)
Cho, Tae-Won (School of Electronics Engineering, Chungbuk University)
Publication Information
Journal of IKEEE / v.16, no.1, 2012 , pp. 34-44 More about this Journal
Abstract
This paper proposes a practical compensation method by using digital signal processing over the creep error which is representative in strain gauge loadcell. The signal compensation method carry out the simulation by deciding compensation constant (time constant) and coefficient measuring the loadcell output response. Then, compensation constant and coefficient are stored on the microprocessor. By using calculated on microprocessor creep error compensation values, weighting value is showed as a digital signal by reducing error values measured through output signals of loadcell. In addition, we apply error compensation method in order to have a dedicated software for loadcell electronic scale. This technique is useful because it has great influence on error rate reduction that has been produced by conventional electronic scales (0.03%). As a result our technique gives better accuracy (0.01%~0.003%) as what is given by digital electronic scale, while it has less complex operation processing.
Keywords
creep; loadcell; creep compensation; creep occurrence; strain gauge;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Makabe M and K. Toru, "High Accurate Creep Compensation Method for Load Cell," SICE Annual Conference 2007, Sept. 17-20, 2007.
2 정광화, "디지탈저울의 정밀도향상을 위한 전기적 변환기의 성능검사 및 개선점 연구," 한국 표준 연구소, pp. 1-6. 1984.
3 Fukuda, K and H. Morinaka, "Test Methods Uncertainties for Loadcell for Weighting Instruments," 産總硏計量標準報告. 117-121, 2005.
4 Tech application, "ひずみゲージ," pp. 1 - 3. A&D Co., Ltd.
5 Tech application, "ロードセルの基本回路," pp. 1-3. A&D Co., Ltd.
6 Tech application, "各種補正回路," , pp. 1-2. A&D Co., Ltd.
7 Tech application(1999), "Signal Conditioning Wheatstone Resistive Bridge Sensors," SLOA034, pp. 1-5. Texas instruments co., Ltd.
8 Otuka A and T. Koyama(2009) "Digital Creep Compensation Method for Loadcell in Varies Loading Patterns," SICE, pp. 369-373.
9 OIML R 76(2006(E)), "3.1 Accuracy classes," International recommendation OIML R 76.
10 OIML R 76(2006(E)), "3.5 Maximum permissible errors," International recommendation OIML R 76.
11 OIML R 76(2006(E)), "3.9.4.1 Creep" International recommendation OIML R 76.