Torque traceability examination of calibration laboratories in Korea

Park, Yon-Kyu; Kim, Minseok; Lee, Jeong-Tae; Lee, Ho‐Young; Kang, Dae-Im

doi:10.1016/j.measurement.2009.09.001

Cited by 7 publications

(6 citation statements)

References 1 publication

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“…The standard measurement results with known accuracy must be used to represent the input and out torque of the tested reducers to compared with the measurement results of TMMISR and TMMOSR to ensure accuracy in the whole measurement range. 24,25 This process can get rid of the torque measurement error cause by the transmission of torque in the transmission chain. This comparative method was used to calibrate the torque transducers of the proposed torque-measurement system.…”

Section: Torque Calibration Methodsmentioning

confidence: 99%

“…In particular, the special measuring equipment mainly needs to be improved from the perspective of instrument structure, torsional stiffness, 15 error analysis, 16 and precision traceability. 17,18 Figure 1 depicts a layout commonly employed for the testing of high-precision reducers. This setup can be used for the measurement of multiple parameters.…”

Section: Introductionmentioning

confidence: 99%

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Design and calibration of the accurate torque measurement systems of the precision robot reducer detector

Zhang

Yu³

et al. 2022

Measurement and Control

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The input and output torque testing is crucial for improving the quality of Industry robot reducers. In this study, the TMMISR and TMMOSR for a vertical-type robot reducer detector were designed. The length of measurement chain between the torque transducer and the tested reducer was shorten. The overall stiffness of this instrument has been improved through structural optimization. The characteristics of the two main parts of the torque-measurement errors were also analyzed. A high precision torque calibrator with a standard torque output is used to handle the torque calibration process. An error compensation method based on a backpropagation neural network was adopted for the error compensation process in this study. After error compensation, torque-measurement precision of 0.1% can be achieved by the reducer detector over the full torque measurement scale, and the instrument can be used for both static and dynamic measurements.

show abstract

Section: Torque Calibration Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and calibration of the accurate torque measurement systems of the precision robot reducer detector

Zhang

Yu³

et al. 2022

Measurement and Control

View full text Add to dashboard Cite

show abstract

“…It is required that the system output with known measurement accuracy is compared with the measurement results of the torque transducers to ensure accuracy in the measurement range [29,30]. In general, highprecision instruments or sensor systems are used as standards in a calibration process.…”

Section: Torque Calibration Methodmentioning

confidence: 99%

Torque Measurement of High‐Precision Reducer for Industrial Robot

Zhang

2021

Journal of Sensors

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Torque testing is crucial to improve the quality of high-precision reducers—the core component of industrial robots. Herein, a torque-measurement system for a novel vertical measuring instrument is designed. The distance from the torque transducers to the robot reducer is minimized to ensure the shortest measurement chain. The symmetrical system structure improves the overall rigidity, and error compensation can be performed easily. The characteristics of the torque measurement errors due to shaft bending and torsional deformations were also analyzed. A torque calibrator comprising two high-precision torque output systems was used to calibrate torque transducers in the measurement system. Reasonable and practical compensation models based on a backpropagation neural network were developed to accurately obtain the input and output torques of the reducer. As the torque-measurement precision of the reducer detector reached 0.1% over the entire torque range, the instrument can be used for accuracy measurement of the input and output torques of the robot reducer.

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“…However, in terms of practical application, this equipment cannot meet the development need of robot precision reducers from practical application. e measuring equipment mainly needs to be improved [16,17] in terms of instrument structure, torsional stiffness [18], error analysis, and precision traceability [19].…”

Section: Introductionmentioning

confidence: 99%

Design and Calibration of Torque Measurement System of Comprehensive Performance Test Instrument of Industrial Robot Reducer

Qiu

et al. 2022

Computational Intelligence and Neuroscience

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The measurement of input and output torque of a precision reducer, the core component of an industrial robot, plays a vital role in evaluating the robot's performance. The TMSIS and TMSOS of a vertical cylindrical high-precision reducer detector were designed and investigated in this study to realize the accurate measurement of input and output torque of the reducer. Because a transmission chain connects the torque transducer and the reducer, the characteristics of the inevitable additional torque are analyzed in detail. A torque calibration device is developed to realize the calibration of the torque measurement system. The readings of the torque calibration device are compared with the data of the instrument’s torque measurement system to realize the instrument's torque calibration. The improved particle swarm optimization and Levenberg–Marquardt algorithm-based radial basis function neural network is used to compensate for the error of the torque measurement system. The parameters of the RBF neural network are settled according to the characteristics of the additional torque and the torque calibration results. The experimental results show that the torque measurement accuracy of the torque measurement system can reach 0.1% FS after torque calibration and error compensation.

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Torque traceability examination of calibration laboratories in Korea

Cited by 7 publications

References 1 publication

Design and calibration of the accurate torque measurement systems of the precision robot reducer detector

Design and calibration of the accurate torque measurement systems of the precision robot reducer detector

Torque Measurement of High‐Precision Reducer for Industrial Robot

Design and Calibration of Torque Measurement System of Comprehensive Performance Test Instrument of Industrial Robot Reducer

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