Measuring system for high‐precision voltage measurements from high‐impedance sources

1977 ◽  
Vol 48 (12) ◽  
pp. 1545-1549 ◽  
Author(s):  
G. Edwall
Keyword(s):  
High Precision ◽  
Measuring System ◽  
High Impedance ◽  
Precision Voltage

Research on the High Precision Laser Line Scanning Measuring System

2007 ◽  
Vol 339 ◽  
pp. 131-135 ◽  
Author(s):  
Jian Jun Ding ◽  
Zhuang De Jiang ◽  
Bing Li ◽  
Jun Jie Guo
Keyword(s):  
High Precision ◽  
Laser Scanning ◽  
Laser Line ◽  
Measuring System ◽  
Surface Measurement ◽  
Iteration Algorithm ◽  
Reconstruction Method ◽  
Loop Feedback ◽  
Axis Position ◽  
Line Scanning

Rapid reverse technology is one of the key technologies with which the enterprises develop new product and occupy the market rapidly. How to realize the reverse measurement and CAD geometry reconstruction rapidly and accurately is always the most important focus for the researchers. Based on the laser scanning technology, the realization principle of the laser line scanning measuring system is presented and the approaches to improve the precision are also analysed in the paper. The self-adaptation adjustment of the probe position can move the light knife image to the optimal imaging area of the CCD according to the calibration result, which will ensure the measurement precision of the CCD image. With the inner velocity loop and outer position loop feedback control, the simple axis position precision of the mechanical system can be controlled within 5um. In order to pick up the points of the light knife centre rationally and exactly, the reconstruction-disperse iteration algorithm is put forward. After processed by different iteration times, the optimal points can be obtained. The reconstruction method of curve and surface based on NURBS is also given. The paper presents the application and realization of the system at last, which realizes the curve and surface measurement with high precision.

Stable Josephson reference voltages between 0.1 and 1.3 V for high‐precision voltage standards

1985 ◽  
Vol 47 (11) ◽  
pp. 1222-1223 ◽  
Author(s):  
J. Niemeyer ◽  
L. Grimm ◽  
W. Meier ◽  
J. H. Hinken ◽  
E. Vollmer
Keyword(s):  
High Precision ◽  
Precision Voltage

A Novel Integration Method with Stabilizing Voltage and Frequency, UPS, Intelligent Charging for Mobile Power Supply

2014 ◽  
Vol 530-531 ◽  
pp. 1126-1129
Author(s):  
Yi Fei Wang ◽  
You Xin Yuan ◽  
Liang Yuan ◽  
Ping Kuang ◽  
Jing Chen
Keyword(s):  
High Precision ◽  
Power Supply ◽  
Topological Structure ◽  
Integration Method ◽  
Integrated System ◽  
Voltage Amplitude ◽  
Integration System ◽  
Advanced Method ◽  
Integrated Method ◽  
Precision Voltage

A novel integration method with stabilizing voltage and frequency, UPS, intelligent charging for mobile power supply has been proposed in this paper. Process of the advanced method can be divided into four steps, including the generating electricity, outputting stabilizing voltage and frequency, UPS, intelligent charging. The following works have been done in the study: the principle of the integration method, the topological structure of integration system, the Implementation of the integration method. According to the principle of the integrated method, the integrated system can be developed. The system can be realized functions, such as the generating electricity, outputting stabilizing voltage and frequency, UPS, intelligent charging and so on. By the system, the high precision voltage amplitude and frequency is supply to outdoor load, and the UPS state is maintained.

Design of a Constant Probing Force System for Profilometer

2014 ◽  
Vol 511-512 ◽  
pp. 301-306
Author(s):  
Shou Bin Liu ◽  
Zhan Ping Li
Keyword(s):  
High Precision ◽  
Voice Coil Motor ◽  
Experimental Results ◽  
Measuring System ◽  
Core Component ◽  
Force System ◽  
The Core ◽  
Displacement Measurements

The core component of profilometer is a stylus displacement measuring system, whose resolution reaches nanoscale. Since the stylus tip is very small, a variation on probing force has a great impact on the results of high-precision displacement measurements. In this paper, a special flat rectangular voice coil motor is designed to realize a constant probing force for the stylus displacement measuring system. Experimental results show the probing force can be adjusted from 5mg to 1000mg and the resolution can reach 5mg.

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