Design of Automatic Measuring Instrument of Irregular Objects’ Centroid

By utilizing the parallel axis theorem of moment of inertia and the graphic geometric transformation theory as well as the method of rotating and moving axis, the calculation formula of irregular objects’ centroid was derived. And on the basis of a single axis air bearing table which was used for measuring the moment of inertia of objects around a fixed axis, the complete instrument of measuring the irregular objects’ centroid was designed. The objects’ centroid and moment of inertia could be measured synchronously. Through the analysis of the influence on measuring accuracy caused by measuring factors’ errors, the method of improving the measuring accuracy of instrument was derived. The measuring instrument meets the requirement of measuring the irregular objects’ centroid precisely.

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Design and Research of Carbon Dioxide Automatic Measuring Instrument

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.706-708.704 ◽

2013 ◽

Vol 706-708 ◽

pp. 704-707

Author(s):

Qiang Liu ◽

Tao Wu

Keyword(s):

Carbon Dioxide ◽

Dependent Manner ◽

Measuring Instrument ◽

Automatic Measuring ◽

Important Material ◽

System Composition ◽

Working Principle ◽

Automatic Measuring Instrument ◽

Dose Dependent ◽

Photosynthesis And Respiration

Carbon dioxide is the very important material of plants when they are making food by means of photosynthesis. The concentration of carbon dioxide restricts photosynthesis and respiration in a dose-dependent manner. Therefore, keeping stability concentration of carbon dioxide is quite important for plant to grow rapidly. This paper mainly introduced the system composition and working principle of carbon dioxide automatic measuring instrument, the system taking Freescale MCU as control core. The instrument can collect signal, display data and reset by connecting with the PC. The experiment result states clearly this carbon dioxide automatic measuring instrument has practical value and application significance.

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Automatic Measuring Instrument of Dam Horizontal Deformation Based on Laser Scan Concept

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.442.372 ◽

2013 ◽

Vol 442 ◽

pp. 372-377

Author(s):

Jian Yin Lu ◽

Yun Fei Zhou

Keyword(s):

Hardware Design ◽

Deformation Monitoring ◽

Flow Chart ◽

Measuring Instrument ◽

Horizontal Deformation ◽

Automatic Measuring ◽

Design Scheme ◽

Automatic Measuring Instrument ◽

Dam Deformation

In this paper, a design of an automatic measuring instrument of dam horizontal deformation based on laser scan concept is introduced. According to the demand of the dam deformation monitoring, the design chooses STM32F103CBT6 as the hardware control platform, and the laser scan concept is introduced. The measuring principle, main hardware design scheme and software flow chart are introduced in this paper.

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Physical Design of an Automatic Measuring Instrument for the Flatness Error of the Rail Wagon

Materials Science Forum ◽

10.4028/www.scientific.net/msf.800-801.807 ◽

2014 ◽

Vol 800-801 ◽

pp. 807-811

Author(s):

Bo Zhu ◽

Wan Ru Shang ◽

Liang Zhou ◽

Chen Yang Zhao

Keyword(s):

Measurement Accuracy ◽

Measuring Instrument ◽

Work Efficiency ◽

Sensing Element ◽

Automatic Measuring ◽

Element Analysis ◽

Main Structure ◽

Automatic Measuring Instrument ◽

Flatness Error ◽

Gauge Measurement

The automatic measuring instrument for the flatness error of the rail wagon is designed with carbon fiber and aluminium alloy, which makes the instrument handy with good stiffness. After the design for the main structure and arranging the position of sensing element, finite element analysis is used to guarantee that deformation of structure itself will not affect the measurement accuracy. The design of the automatic measuring instrument for the flatness error of the Rail wagon takes the place of tradional feeler gauge measurement, raised the work efficiency and improves the measurement accuracy to 0.1mm.

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