scholarly journals Research on the counter-force calibration method of tablet hardness tester

2021 ◽  
Vol 18 ◽  
pp. 100233
Author(s):  
Zhenyu Wang ◽  
Xiang Ren ◽  
Haiying Feng ◽  
Dejun Luo
Keyword(s):  
Calibration Method ◽  
Hardness Tester ◽  
Force Calibration ◽  
Tablet Hardness

FORCE CALIBRATION OF NANO UNIVERSAL TESTING MACHINE USING MILLIGRAM WEIGHTS

2013 ◽  
Vol 24 ◽  
pp. 1360031
Author(s):  
CHUNG-LIN WU ◽  
CHING-FEN TUAN
Keyword(s):  
Force Measurement ◽  
Testing Machine ◽  
Calibration Method ◽  
Force Transducer ◽  
Force Measurements ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Small Force ◽  
Force Calibration ◽  
Force Range

This paper presents an approach for calibrating the force transducer on the nano universal testing machine using milligram weights. Previous research on force calibration of such a system focused on the range from 10 mN to 200 mN, ignoring forces below 10 mN. The main purpose of this study is to analyze and calculate the uncertainty of force measurements within the range from 0.2 mN to 10 mN. The ABA calibration method in accordance with OIML R111-1 is adopted to determine the uncertainty in force measurement. The results indicate that the maximum relative uncertainty of force measurement is 7.0 × 10−3 with a 95% confidence level. The investigation can be used as the basis for evaluating measurement uncertainty of the system in small force range.

Nano and Micro Mechanical Measurement of Interaction Forces Between Solid Surfaces

2006 ◽  
Vol 326-328 ◽  
pp. 1-4
Author(s):  
Kyung Suk Kim
Keyword(s):  
Scale Effects ◽  
Measurement Techniques ◽  
Calibration Method ◽  
Lateral Force ◽  
Solid Surfaces ◽  
Lateral Interaction ◽  
Force Measurements ◽  
Interaction Forces ◽  
Size Scale ◽  
Force Calibration

Two different types of experimental methods have beeen developed for measuring lateral interaction forces between two solid surfaces for nano- and micro-meter scale contacts. One is the type of direct measurement methods which typically utilize AFM instrumentations. In the direct lateral force measurements some size-scale effects are commonly observed due to the effects of adhesion and surface roughness. A recent development of a fine AFM lateral force calibration method, a diamagnetic lateral force calibrator, has made it possible to study such size-scale effects systematically. The other type is the field projection method which requires a high resolution measurement of a deformation field near the edge of a contact. For such measurements a comprehensive map of deformation measurement techniques is introduced in a domain of spatial and strain resolutions. This technique provides a way of assessing the non-uniform distribution of the surface interaction forces for nano and micro-meter scale contacts.

Research on Nonlinear Driving Control and Driving Force Calibration of Pure Electric Vehicle

2014 ◽  
Vol 620 ◽  
pp. 297-305
Author(s):  
Hong Bo Zhou ◽  
Jian Bo Cao ◽  
Ze Xin Zhou ◽  
Tao Wang ◽  
Li Li Jin ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Driving Force ◽  
High Efficiency ◽  
Control Method ◽  
Permanent Magnet Synchronous Motor ◽  
Calibration Method ◽  
Battery Life ◽  
Accelerator Pedal ◽  
Force Calibration ◽  
Calibration Techniques

According to the main problems of nonlinear driving control and driving force calibration of pure electric vehicle, based on the research of permanent magnet synchronous motor control method, on the vehicle's driving force calibration techniques were studied, from the high efficiency and energy saving analysis of necessary driving force calibration, designed a new driving force calibration method, and drew the control curve of the accelerator pedal opening and the speed and the motor torque relationship between the three, and finally to pure electric self-developed to test platform for automotive related experiments. The experimental results show that, in the vehicle driving process, the driving force calibration technique compared with the previous calibration has better performance, while no obvious change of acceleration performance, the current value of the initial acceleration phase have been greatly decreased, could make the vehicle run more energy efficient, extended battery life and vehicle driving mileage.

scholarly journals Study of the technological properties of excipients in the development of the composition of orally dispersible tablets

2021 ◽  
Vol 10 (4) ◽  
pp. 46-53
Author(s):  
I. D. Kasymov ◽  
A. V. Basevich
Keyword(s):  
Experimental Data ◽  
Bulk Density ◽  
Technological Properties ◽  
Solubility In Water ◽  
Hardness Tester ◽  
Tablet Press ◽  
Dispersible Tablets ◽  
Tablet Hardness ◽  
Multifactorial Experiment

Introduction. The article presents the results of studying the technological properties of individual excipients widely used in the compositions of existing orally dispersed tablets (ODT) for subsequent planning a multifactorial experiment. Samples of excipients were analyzed according to such pharmacopoeial indicators as description, flowability, bulk density, compressibility, fractional composition, solubility in water.Aim. The aim of the work is to create a list and study the technological properties of candidate substances for the role of auxiliary substances in the composition being developed by the ODT.Materials and methods. The technological properties of excipient samples were studied according to the methods of the State Pharmacopoeia of the XIV edition using the flowability tester GTL (ERWEKA, Germany), the bulk density tester SVM 221 (ERWEKA, Germany), the tablet press PGR-10 (LabTools, Russia) and the tablet hardness tester TBH 125 TDP (ERWEKA, Germany).Results and discussion. As a result of the study, experimental data on the technological properties of excipient samples were collected, and the selected samples were compared according to pharmaceutical and technological indicators.Conclusion. In the course of the study, a list of auxiliary substances for the development of the composition of ODT was formed and studies of their technological properties were carried out. The obtained experimental data will allow to develop an optimal matrix of a multifactorial experiment for the development of the composition of ODT and justify the choice of excipients.

Design and optimization of the diamagnetic lateral force calibration method

2018 ◽  
Vol 89 (11) ◽  
pp. 113704 ◽  
Author(s):  
Cangyu Qu ◽  
Bingtong Liu ◽  
Ming Ma ◽  
Quanshui Zheng
Keyword(s):  
Calibration Method ◽  
Lateral Force ◽  
Design And Optimization ◽  
Force Calibration

Research on a non-linear calibration method for dynamometer

Sensor Review ◽  
2020 ◽  
Vol 40 (2) ◽  
pp. 167-173
Author(s):  
Zhang Jun ◽  
Chang Qingbing ◽  
Ren Zongjin
Keyword(s):  
Force Measurement ◽  
Load Sharing ◽  
Calibration Method ◽  
Mapping Method ◽  
Linear Calibration ◽  
Content Type ◽  
Multiple Parameters ◽  
Non Linear ◽  
Force Calibration ◽  
The Relationship

Purpose The purpose of this paper is to solve the problem that the relationship between loading forces, which were applied at different positions on a plane, and output values of load-sharing dynamometer is non-linear. Design/methodology/approach First, the analytical model of ISPM (isodynamic surface proportional mapping method) method, which is used to calibrate dynamometer, was established. Then, a series of axial force calibration tests were performed on a load-sharing dynamometer at different loading positions. Finally, according to output values, calibration forces at different loading positions were calculated by ISPM method, and corresponding distribution histogram of calibration force error was generated. Findings The largest error between calculated force and standard force is 2.92 per cent, and the probability of calculated force error within 1 per cent is 91.03 per cent, which verify that the ISPM method is reliable for non-linear calibration of dynamometers. Originality/value The proposed ISPM method can achieve non-linear calibration between measured force and output signal of load-sharing dynamometer at different positions. In addition, ISPM method can also solve some complex non-linear problems, such as prediction of plane cutting force under the influence of multiple parameters, the force measurement of multi-degree-of-freedom platform and so on.

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