Photoelectric method of checking the kinematic accuracy of mechanisms

1972 ◽  
Vol 15 (11) ◽  
pp. 1620-1622
Author(s):  
V. V. Kulagin ◽  
N. A. Mikhailov ◽  
G. V. Egorov
Keyword(s):  
Photoelectric Method ◽  
Kinematic Accuracy

Calculation of the accuracy of a control head of a simplified design for dimensional control of parts

2020 ◽  
pp. 35-37
Author(s):  
Ya.L. Liberman ◽  
A.N. Mahiyanova ◽  
Gorbunova L.N.
Keyword(s):  
Size Control ◽  
Dimensional Control ◽  
Kinematic Accuracy ◽  
Measuring Probe

The metrological scheme of the control head of a simplified design is presented, its kinematic accuracy is analyzed. It is shown, that the effectiveness of the use of the head of this design, i.e., the accuracy of control, when controlling tolerances, in the manufacture of the part depends on the choice of the length of the measuring probe. Keywords part, size, control, measuring probe, kinematic accuracy, metrological scheme. [email protected]

Photoelectric Method for Quantitative Evaluation of Mast-Cell-Associated Enzyme Activity in Human Gingival Tissues

1970 ◽  
Vol 49 (3) ◽  
pp. 480-486
Author(s):  
F.M. Sorenson ◽  
J.S. Bennett ◽  
D. Fujita ◽  
F.R. Poindexter ◽  
W.B. Hall
Keyword(s):  
Mast Cell ◽  
Enzyme Activity ◽  
Mast Cells ◽  
Quantitative Evaluation ◽  
Photoelectric Method ◽  
Scanning Method ◽  
Cell Counts ◽  
Biologic Activity ◽  
Large Numbers ◽  
Human Gingiva

Simple counts of mast cells per unit of human gingiva are often difficult to interpret because of the large numbers and varying sizes and shapes of the counted structures. The relatively simple photoelectric scanning method described herein eliminates tedious counting procedures while providing a measure of the relative quantity of stainable mast cell granules within the area scanned. Thus, the method may provide a better estimate of the total biologic activity than would simple mast cell counts.

scholarly journals Sensitivity Analysis of Reliability of Low-Mobility Parallel Mechanisms Based on a Response Surface Method

2021 ◽  
Vol 11 (19) ◽  
pp. 9002
Author(s):  
Qiang Yang ◽  
Hongkun Ma ◽  
Jiaocheng Ma ◽  
Zhili Sun ◽  
Cuiling Li
Keyword(s):  
Sensitivity Analysis ◽  
Response Surface ◽  
Response Surface Method ◽  
Inverse Kinematics ◽  
Parallel Mechanism ◽  
Error Component ◽  
Parallel Mechanisms ◽  
Kinematic Accuracy ◽  
Surface Method ◽  
Input Error

Kinematic accuracy is a crucial indicator for evaluating the performance of mechanisms. Low-mobility parallel mechanisms are examples of parallel robots that have been successfully employed in many industrial fields. Previous studies analyzing the kinematic accuracy analysis of parallel mechanisms typically ignore the randomness of each component of input error, leading to imprecise conclusions. In this paper, we use homogeneous transforms to develop the inverse kinematics models of an improved Delta parallel mechanism. Based on the inverse kinematics and the first-order Taylor approximation, a model is presented considering errors from the kinematic parameters describing the mechanism’s geometry, clearance errors associated with revolute joints and driving errors associated with actuators. The response surface method is employed to build an explicit limit state function for describing position errors of the end-effector in the combined direction. As a result, a mathematical model of kinematic reliability of the improved Delta mechanism is derived considering the randomness of every input error component. And then, reliability sensitivity of the improved Delta parallel mechanism is analyzed, and the influences of the randomness of each input error component on the kinematic reliability of the mechanism are quantitatively calculated. The kinematic reliability and proposed sensitivity analysis provide a theoretical reference for the synthesis and optimum design of parallel mechanisms for kinematic accuracy.

New photoelectric method for sighting objectively scale graduations

1975 ◽  
Vol 18 (3) ◽  
pp. 369-371
Author(s):  
V. M. Sikharulidze ◽  
G. P. Zedginidze
Keyword(s):  
Photoelectric Method
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