Design for 2 MN dead-weight and build-up hybrid force standard machine

Yao, Jianhua; Lai, Zhengchuang; Lin, Shuo; Yang, Xiaoxiang; Wan, Liang

doi:10.1088/1742-6596/1065/4/042041

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Dead-weight type force standard machines (DWMs) use a mass-calibrated deadweight and local gravitational acceleration to provide forces up to 4.4 MN with a calibration and measurement capability (CMC) of 2 × 10 −5 or better (coverage factor of k = 2) [3]. Although several NMIs have introduced MN-class DWMs in recent years [3][4][5][6][7][8], establishing a DWM with a capacity of 500 kN or more requires significant resources. Force standards in this range often involve more complex machines that use smaller deadweights and force amplification via levers and hydraulic piston-cylinders.…”

Section: Introductionmentioning

confidence: 99%

Calibration and measurement capability evaluation for 1 MN hydraulic force standard machine newly installed at NMIJ

Hasegawa,

Hayashi

2024

Eng. Res. Express

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Social safety is predicated on accurately evaluated force standards and a system for force traceability. National Metrology Institute of Japan, the body responsible for managing Japan's national force standards, has implemented a new 1 MN hydraulic force standard machine. In this paper, we assess the calibration and measurement capability of this new force standard machine using five different force measuring instruments. Our findings confirm that its capability is less than 1×10−4 relative, demonstrating its adequate performance as one of the national force standards.

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Section: Introductionmentioning

confidence: 99%

Calibration and measurement capability evaluation for 1 MN hydraulic force standard machine newly installed at NMIJ

Hasegawa,

Hayashi

2024

Eng. Res. Express

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“…1–5 Since the late 1970s, several build-up force calibration machines (BUFCM) with capacities over 20 MN have been set up to satisfy the dissemination of the force in the meganewton range, which includes a 30 MN BUFCM at the National Physical Laboratory (NPL) in the United Kingdom, 6 with its twin machine at ‘Ukrmetrteststandard’ in Ukraine; 7 a 53 MN BUFCM at National Institute of Standards and Technology (NIST) in the United States; 8,9 and a 60 MN BUFCM at the Fujian Institute of Metrology (FJIM) in China. 10–12…”

Section: Introductionmentioning

confidence: 99%

Effect of the load pad size on the output of the column-type force transducer

Wan

Yang

Yao

2019

Measurement and Control

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The size of the load pad had a significant effect on the output of the column-type force transducer. It was important to eliminate the influence when the transducer was loaded in a force transducer build-up system which worked as the primary force transfer standard. A common model of the output about the column-type force transducer affected by the shape of load pad was analysed. Seven load pads with various dimensions were designed and fixed on a 300-kN force transducer to investigate the influence of the dimension on the indication error of the transducer. The results showed that the load pad of the sphere-plane contact design would cause the smallest indication error but the largest contact stress. It was better to use the load pad of the sphere-sphere contact design with the spherical radius ratio of ball to cup equalled to 0.2. The spherical radius of the ball should be small under the permission of material strength. In addition, it was important to enhance the stiffness of the build-up system to eliminate the effect of the load pad size on the indication error of the transducer.

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“…Such systems are composed by several uniaxial force transducers (UFTs) that can be calibrated directly by primary force standard machines. Generally, a BUS is composed by three UFTs [1][2][3][4][5][6] in the same direction, therefore allowing the measurement of a force that has three times the capacity of the single UFT. If it is required to reach higher loads starting from the same UFT capacity, to maintain an isostatic condition, it is necessary to create a more complex structure by adding additional UFTs in order to increase the total capacity [7].…”

Section: Introductionmentioning

confidence: 99%

Design and metrological evaluation of the new 5 MN hexapod-shaped multicomponent build-up system

et al. 2016

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The new 5 MN Hexapod-Shaped Multicomponent Build-Up System (HSM-BUS) represents a significant progress in the field of reference transducers in the high force range. As any build-up system, the presented hexapod-shaped multicomponent force transducer can lead not only to measure forces 5 times higher than the capacity of a each single Uniaxial Force Transducer (UFT), but gives also information about the other components of the force vector and of the moment vector. Furthermore, the calibration of such type of multicomponent force transducer regards only the calibration of the signal outputs coming from each UFT and the calibration of the geometry of the system. In this work an a-priori evaluation of the expected uncertainty is performed. As a first approximation, the effects of the calibration uncertainties of UFTs and of the geometrical tolerances given on the construction drawing were considered. Subsequently, with a Finite Element Simulation of the mechanical behavior of the 5 MN HSM-BUS under load, a mathematical model of elastic deformations has been evaluated and applied for evaluating and correcting the systematic errors due to the deformation of the geometry under load.

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Design for 2 MN dead-weight and build-up hybrid force standard machine

Cited by 3 publications

References 2 publications

Calibration and measurement capability evaluation for 1 MN hydraulic force standard machine newly installed at NMIJ

Calibration and measurement capability evaluation for 1 MN hydraulic force standard machine newly installed at NMIJ

Effect of the load pad size on the output of the column-type force transducer

Design and metrological evaluation of the new 5 MN hexapod-shaped multicomponent build-up system

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