A high precision optical angle measuring instrument for large optical axis offsets

2014 ◽  
Author(s):  
Jing Xie ◽  
Zuojun Tan
Keyword(s):  
High Precision ◽  
Optical Axis ◽  
Measuring Instrument ◽  
Angle Measuring

scholarly journals High Precision Human Skin Temperature Fluctuations Measuring Instrument

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4101
Author(s):  
Nikolai B. Suvorov ◽  
Alexander V. Belov ◽  
Konstantin G. Kuliabin ◽  
Aleksei A. Anisimov ◽  
Timofei V. Sergeev ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Human Skin ◽  
High Precision ◽  
Temperature Fluctuations ◽  
Preliminary Test ◽  
Semiconductor Diode ◽  
Measuring Instrument ◽  
Voltage Range ◽  
Temperature Oscillations ◽  
Depth Study

This paper describes the experimental results of testing a prototype of a high precision human skin rapid temperature fluctuations measuring instrument. Based on the author’s work, an original circuit solution on a miniature semiconductor diode sensor has been designed. The proposed circuitry provides operation in the full voltage range with automatic setting and holding the operating point, as well as the necessary slope of the conversion coefficient (up to 2300 mV/°C), which makes it possible to register fast temperature oscillations from the surface of the human body and other biological objects. Simulation results in the Microcap 12 software and laboratory tests have confirmed all declared design specifications: temperature resolution of 0.01 °C, transducer thermal time constant of 0.05 s. An original thermostat and an experimental setup for the simultaneous registration of the electrocardiogram, pulse wave signals from the Biopac polygraph MP36 and a signal of temperature oscillations from the prototype thermometer have been designed for further investigations. The preliminary test results indicates that using the designed measuring instrument gives a possibility to provide an in-depth study of the relationship between micro- and macro-blood circulations manifested in skin temperature fluctuations.

New high-precision pneumatic measuring instrument

1968 ◽  
Vol 11 (9) ◽  
pp. 1190-1191
Author(s):  
A. A. Kudinov ◽  
�. L. Noskin
Keyword(s):  
High Precision ◽  
Measuring Instrument ◽  
Pneumatic Measuring

An Angle Measuring System for Knife Blade Based on Laser and Electronic Clinometer

2011 ◽  
Vol 339 ◽  
pp. 80-83
Author(s):  
Fen Ju An ◽  
Yu Jun Feng ◽  
Zhong Ming Tan ◽  
Wen Qing Shi ◽  
Zheng Ye Xiong ◽  
...  
Keyword(s):  
High Precision ◽  
Low Cost ◽  
Measuring System ◽  
Practical Application ◽  
Blade Angle ◽  
Angle Measuring ◽  
Knife Blade ◽  
Easy Operation

In order to measure the knife blade angle, which has a great impact on sharpness and sharpness retentivity of knives and scissors, an angle measuring system for knife blade based on laser and electronic clinometer is presented. Practical running and testing proved the system's feasibility, reliability and great value in practical application. Meanwhile, the system has many advantages, such as easy operation, low cost, high precision, small errors, non-contact, etc.

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