• Title/Summary/Keyword: Loadcell

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Development of 3-axis Loadcell for Measuring the Side Force of MPV Using Design of Experiment (실험계획법을 이용한 다목적 차량의 측면하중 측정을 위한 3축 로드셀 개발)

  • Chu, Sung-Il;Park, Jun-Hyub;Lee, Jin-Gun;Park, Ji-Young
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.4
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    • pp.83-93
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    • 2007
  • This paper represents the development of 3-axises loadcell for measuring the side-force of suspension module of MPV(Multi Purposed Vehicle). The side force causes the failure of damper, such as leakage. The loadcell was developed using strain gauges, and the Wheastone bridge circuit to compensate for the cross-talk between the each axises and the measurement error by temperature. Structure analysis of loadcell was accomplished with FEM(Finite Element Method) to optimize the location of strain gages. The design optimization for important factors that have an effect on performance of loadcell was accomplished by using DOE(Design of Experiment). Loadcell was produced and successfully tested, showing good sensitivity and low cross-talk. The cross-talk of the developed loadcell is bellow 5%. The load history was measured at proving ground. The maximum side-force, the longitudinal force, and vertical force of MPV are 4.2 kN, 8.0 kN, and 17.0 kN, respectively, at Belgian road.

Loadcell measuring remote monitoring system development (로드셀 계측용 원격 모니터링 시스템 개발)

  • Jarng, Soon-Suck;Kim, Kyung-Suk;Won, Yong-Ill;Kim, Dae-Gon
    • Proceedings of the KIEE Conference
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    • 2005.10b
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    • pp.70-72
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    • 2005
  • The present paper designed a weight measuring instrumentation system in which data conversion and a series of signal processing were totally equipped. 16 loadcell are incoming sensors and each output of the loadcell was amplified and filtered for proper analog signal processing. Several measuring instrumentation OP amps and general purposed OP amps were used. 12 bits AID converters converted analog signals to digital bits and a PIC microprocessor controlled the 16 channels of loadcell. RF RS232 modules were used for wireless communication between the PIC microprocessor and an ethernet host for a remote sensor monitoring system development.

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High Accurate Creep Compensation of the Loadcell using the Strain Gauge (스트레인 게이지식 로드셀의 고정밀 크립보상)

  • Seo, Hae-Jun;Jung, Haing-Sup;Ryu, Gi-Ju;Cho, Tae-Won
    • Journal of IKEEE
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    • v.16 no.1
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    • pp.34-44
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    • 2012
  • 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.

16 channel Loadcell measurement system development. (16 채널 로드셀 계측시스템 개발)

  • Jarng, Soon-Suck;Kim, Kyung-Suk;Won, Yong-Ill;Kim, Dae-Gon
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.1055-1058
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    • 2005
  • The present paper designed a weight measuring instrumentation system in which data conversion and a series of signal processing were totally equipped. 16 loadcell are incoming sensors and each output of the loadcell was amplified and filtered for proper analog signal processing. Several measuring instrumentation OP amps and general purposed OP amps were used. 12 bits A/D converters converted analog signals to digital bits and a PIC microprocessor controlled the 16 channels of loadcell. RF RS232 modules were used for wireless communication between the PIC microprocessor and an ethernet host for a remote sensor monitoring system development.

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A Study on the Development of Raingauge with 0.01 mm Resolution (0.01 mm 급 우량계 개발에 관한 연구)

  • Lee, Bu Yong
    • Journal of Environmental Science International
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    • v.13 no.7
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    • pp.637-643
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    • 2004
  • A new method of automatic recording raingauge is developed to measure rainfall with 0.01mm resolution. This use two different signals to measure rainfall more accurately compare than other raingauges. One is weight of the tipping bucket with rainfall amount and the other is pulse from tipping bucket reverse. New method applied 1 mm tipping bucket mechanism and install loadcell under tipping bucket mechanism for measuring rainfall weight. Loadcell measure weight of rainfall until 1 mm with 0.01 mm resolution and more than 1 mm than bucket reverse and pulse signal generate, after that loadcell measure weight again. The validation of new instrument was examined in the room 65 mm/hour rainfall rate total 53 mm range. There is below than 1 % error of absolute rainfall amount and 0.01 mm resolution. The field test of instrument was carried out by comparing its measured values with values recorded by weight type and standard type on June 1 2003 at Terrestrial Environmental Research Center at Tsukuba University in Tsukuba of Japan, when it has recorded total amount of 40.58 mm rainfall by standard raingauge and new raingauge recorded 41.032 mm. Same rainfall intensity pattern observed in field observation with weight type raingauge. Rainfall intensity between weight type and Lee-A type raingauge reached 0.9947 correlation in 3 minute average.

Development of WIM System Using Digital Loadcell (디지털 로드셀을 이용한 WIM 시스템의 개발)

  • Park, Chan-Won;Jeon, Chan-Min;Park, Heung-Joon
    • Journal of Industrial Technology
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    • v.23 no.A
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    • pp.55-61
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    • 2003
  • In this study, a signal processing and related techniques for development of a weight measuring system using a digital loadcell which is able to satisfy the important properties of WIM (weighing-in-motion) system have been investigated. A fast and high accurate signal processing of the digital load cell sensor for weighing-in-motion system is presented. A/D conversion system is constructed to realize a stable A/D conversion and signal processing algorithm using DSP and microprocessor. A new technique for vibration and measuring speed of the system is also investigated. The proposed method was applied to the actual design and the experimental results showed good performance of the weighing speed and stability.

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Design Technique for Minimizing the Crosstalk Effect in Multiaxis Thrust Measurement Stand (다축 시험대의 상호 간섭 최소화 설계기법)

  • Kim, Joung-Keun;Yoon, Il-Sun
    • Journal of the Korean Society of Propulsion Engineers
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    • v.11 no.3
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    • pp.13-19
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    • 2007
  • This paper described design method to minimize the crosstalk effect of multiaxis thrust measurement stand which can measure the thrust vector control performance of Solid Rocket Motor. This paper presents a theoretical solution for predicting the magnitude of crosstalk and calculates design sensitivity. The results indicate that the most important parameter of crosstalk is the displacement of flexure-loadcell-flexure assembly. And shape, dimension and mechanical properties of flexure and loadcell can also influence the magnitude of crosstalk.