Design of Capacitance Probe Sensor in Deep Hole Diameter Measurement

2014 ◽  
Vol 670-671 ◽  
pp. 1214-1217
Author(s):  
Yu Zhen Ma ◽  
Xuan Sun ◽  
Yi Zhong Zheng
Keyword(s):  
Capacitive Sensor ◽  
Hole Diameter ◽  
Deep Hole ◽  
Diameter Measurement ◽  
Capacitance Sensor ◽  
Type Selection ◽  
Capacitance Probe ◽  
Working Principle ◽  
Probe Sensor ◽  
Selection Of

Based on the working principle of the capacitive sensor, according to the requirements of deep hole diameter measuring, a capacitance probe sensor was designed, and then the design and type-selection of probe structure, cable inner structure to the capacitance probe sensor were done. At the same time, in order to overcome the measurement error caused by eccentricity, the capacitance sensor probe and inner hole of the corresponding fastener both are designed to a taper, taper positioning is relatively accurate positioning way. The design is to avoid the measurement position offset, and ensures the coaxality on the mechanical structure. The equipotential ring technology effectively overcomes the problem of edge effect of capacitance sensor, and makes the probe’s effective measurement electrode under the condition of limited long, can effectively guarantee the measure precision. By moving the capacitance probe in the hole to the different position, we will realize the deep hole diameter measurement in different cross section.

The design of miniaturised displacement transducers for deep hole diameter measurement

Mechatronics ◽  
1999 ◽  
Vol 9 (4) ◽  
pp. 317-327 ◽  
Author(s):  
G.Y Tian ◽  
Z.X Zhao ◽  
R.W Baines ◽  
P Corcoran
Keyword(s):  
Hole Diameter ◽  
Deep Hole ◽  
Diameter Measurement ◽  
Displacement Transducers

Inner Hole Diameter Measuring Based on Capacitive Sensor

2013 ◽  
Vol 739 ◽  
pp. 596-601
Author(s):  
Xuan Sun ◽  
Yu Zhen Ma ◽  
Yong Xin Yu ◽  
Yi Zhong Zheng
Keyword(s):  
Signal Analysis ◽  
Capacitive Sensor ◽  
Hole Diameter ◽  
Measuring System ◽  
Structure Characteristic ◽  
Guard Ring ◽  
Diameter Measurement ◽  
Capacitive Probe ◽  
And Control ◽  
Distance Change

nner hole diameter measuring system based on capacitive sensor was introduced in this paper, the structure characteristic of coaxial cylindrical capacitive probe in measuring inner hole diameter was analyzed;aiming at the signal analysis and control for the whole measurement system, the equipotential guard ring technique was adopted to eliminate edge effect caused for the sensors effective measuring polar plate, the transform circuit with operational amplifier was adopted to overcome the nonlinear defects resulted from polar distance change, the driving cables technique was used to reduce the influence of parasitic capacitance;and then we realize the precision diameter measurement in holes any depth.

A miniaturised sensor for deep hole diameter measurement

1999 ◽  
Vol 23 (4) ◽  
pp. 236-242 ◽  
Author(s):  
G.Y. Tian ◽  
Z.X. Zhao ◽  
R.W. Baines ◽  
P. Corcoran
Keyword(s):  
Hole Diameter ◽  
Deep Hole ◽  
Diameter Measurement

Finite Element Analysis of Capacitance Sensor

2014 ◽  
Vol 599-601 ◽  
pp. 940-943
Author(s):  
Fei Zhou ◽  
Guo Min Lin ◽  
Miao Shang ◽  
Wen Guang Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Capacitive Sensor ◽  
Application Research ◽  
Capacitance Sensor ◽  
Capacitance Change ◽  
Element Analysis ◽  
Development Status ◽  
The Finite Element Analysis ◽  
Working Principle

Capacitive sensor is a kind of parameter type sensor that capacitance is measured is converted to capacitance change. It is widely used in pressure, liquid level, displacement and other tests. In this article, the development status of capacitance sensor is showed; the working principle of capacitive sensor was introduced; through the method of grid subdivision, loading and solving of boundary conditions and the finite element post-processing, etc., the finite element analysis of capacitance sensor is complete, it has important guiding significance for capacitance sensor application research.

Research and Application of High-Efficiency Multi-Cyclone Dust Removal

2011 ◽  
Vol 109 ◽  
pp. 400-404
Author(s):  
Yan Hong Yang ◽  
Da Fu Ni
Keyword(s):  
Structural Design ◽  
High Efficiency ◽  
Dust Removal ◽  
Working Principle ◽  
Selection Of

Performance and working principle of high-efficiency multi-cyclone were analyzed, and the structural design shortage of original high-efficiency multi-cyclone was pointed out. Its structure was researched and designed, including determination of setting chamber and pipe number, selection of material and the design of cyclones.

Basking Site Selection and Usage Strategies of the European Pond Turtle, Emys orbicularis (Linnaeus, 1758) in Babat valley (Gödöllő, Hungary)

2021 ◽  
Vol 28 (4) ◽  
pp. 175-184
Author(s):  
Gergő Erdélyi ◽  
Borbála Szabó ◽  
István Kiss
Keyword(s):  
Site Selection ◽  
Habitat Characteristics ◽  
Freshwater Turtles ◽  
Emys Orbicularis ◽  
Pond Turtle ◽  
Site Type ◽  
Type Selection ◽  
Body Sizes ◽  
Negative Effect ◽  
Selection Of

Sun basking is the most common method for freshwater turtles, such as the European pond turtle, to maintain optimal body temperature. The attributes of the macro- and microhabitat features around the basking sites affect the basking site selection of the European pond turtle. To protect the European pond turtle, it is important to know the basking habits among the biological characteristics of the species, along with the effects of the habitat characteristics and the choice of the type of basking sites. The purpose of our research was to detect the effects of macro- and microhabitat features on the selection of basking sites. We wanted to determine basking site type selection according to the carapace length classes and if there is any difference in the choice of basking trunks and branches with different thicknesses. Turtles choose basking sites with less closed vegetation in their environment. We have detected seasonal differences in the microhabitat features. The closing reed and Typha sp. had a negative effect on the number of observed basking turtles. The most popular type of basking sites in the pond system was the commonly occurred fallen tree trunks and branches in the water, regardless of turtle body size. Most turtles used thinner tree trunks and branches for basking. In the meantime, we found differences in the choice of basking trunks between the turtles with different body sizes. Younger turtles with smaller bodies appeared in larger numbers on emergent branches with smaller diameters.

Comparison and Selection of Different Types of Boiler Soot-Blowers

2014 ◽  
Vol 1008-1009 ◽  
pp. 934-937 ◽  
Author(s):  
Xiu Yan Wang ◽  
Ye Xuan Chen
Keyword(s):  
Different Types ◽  
Primary Means ◽  
Working Principle ◽  
Application Scope ◽  
Selection Of

The application of soot-blower is the primary means for solving the fouling and slagging of coal-fired boilers. And appropriate soot-blowing will greatly improve the efficiency of boilers. Therefore, selecting the appropriate type of soot-blower is surely important. This paper analyzes the working principle, technical characteristics, and application scope of steam soot-blowers, gas pulse shock soot-blowers, acoustic soot-blowers and air shock soot-blowers which are common in boilers. It raises a proposal that different types of soot-blowers should be used in different positions of boilers.

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