Study on the Method of On-Line Measurement of Water Content in Turbine Oil Based on Resonant Cavity Perturbation

2005 ◽  
Author(s):  
Song-Feng Tian ◽  
Zhong-He Han ◽  
Kun Yang
Keyword(s):  
Water Content ◽  
Resonant Cavity ◽  
Measuring System ◽  
Turbine Oil ◽  
Economy Running ◽  
Line Measurement ◽  
Cavity Perturbation ◽  
On Line ◽  
Cavity Configuration ◽  
Lower Thermal Expansion

The accurate measurement of water content in the turbine oil has great significant for guiding steam turbine safety and economy running. A method of the on-line measurement of the water content in the turbine oil based on microwave resonant cavity perturbation is presented in this paper, The author deduced the formula of the volume proportion of water content in turbine oil, the resonant cavity and the measuring system of this method is simple. The precision of measurement can be improved by selecting work pattern with high quality factor, advancing the measurement precision of the relative frequency deflection and adopting the lower thermal expansion coefficient material and the especial resonant cavity configuration. Ten PPM water content in turbine oil can be distinguished by this method.

Precision Focal Measuring System Based on CCD Aerial Cameras

2012 ◽  
Vol 571 ◽  
pp. 304-307
Author(s):  
Mei Zhao ◽  
Yu Fang Sha ◽  
Fei Guo ◽  
Ming Quan Yang
Keyword(s):  
Measuring Method ◽  
Image Resolution ◽  
Measuring System ◽  
Gravity Method ◽  
Line Measurement ◽  
Charge Coupled Devices ◽  
Exact Determination ◽  
On Line ◽  
Dynamic Scanning

In view of bigger error (0.24%) of conventional measuring method, this paper focuses on a bigger aperture aerial camera focus measuring system and discusses measuring principle and structure of the system. The image in this system is received by the collimator of long focus and area CCD (Charge Coupled Devices) camera. Using dynamic scanning and center of gravity method, the system measures effectively the location and size of the optimum image. The image resolution of CCD can be up to one tenth of the size of the photosensitive sensor and the precision of 0.1percent of focus measuring can be obtained. The problem of the larger error of conventional measuring method is salved fundamentally. The accurate, real-time and on-line measurement of the focus of aerial camera lens can be realized and the exact determination of the position of the surface can be determined.

Thickness Measurement in the AEM by Macintosh-Based Analysis of Two-Beam Convergent Beam Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 504-505
Author(s):  
John F. Mansfield ◽  
Douglas C. Crawford
Keyword(s):  
Electron Microscope ◽  
Video Camera ◽  
Thickness Measurement ◽  
Specimen Thickness ◽  
Crystalline Materials ◽  
Beam Dynamic ◽  
Line Measurement ◽  
On Line ◽  
Image Position ◽  
Convergent Beam

A method has been developed that allows on-line measurement of the thickness of crystalline materials in the analytical electron microscope. Two-beam convergent beam electron diffraction (CBED) patterns are digitized from a JEOL 2000FX electron microscope into an Apple Macintosh II microcomputer via a Gatan #673 CCD Video Camera and an Imaging Systems Technology Video 1000 frame-capture board. It is necessary to know the lattice parameters of the sample since measurements are made of the spacing of the diffraction discs in order to calibrate the pattern. The sample thickness is calculated from measurements of the spacings of the fringes that are seen in the diffraction discs. This technique was pioneered by Kelly et al, who used the two-beam dynamic theory of MacGillavry relate the deviation parameter (Si) of the ith fringe from the exact Bragg condition to the specimen thickness (t) with the equation:Where ξg, is the extinction distance for that reflection and ni is an integer.

Control Strategies for a Highly Loaded Biological Ammonia Elimination Process

1993 ◽  
Vol 28 (11-12) ◽  
pp. 531-538 ◽  
Author(s):  
B. Teichgräber
Keyword(s):  
Closed Loop ◽  
Control Strategies ◽  
Level Control ◽  
Sludge Dewatering ◽  
Loop Control ◽  
Reject Water ◽  
Line Measurement ◽  
Control Pattern ◽  
On Line ◽  
Treatment Facilities

A nitrification/denitrification process was applied to reject water treatment from sludge dewatering at Bottrop central sludge treatment facilities of the Emschergenossenschaft. On-line monitoring of influent and effluent turbidity, closed loop control of DO and pH, and on-line monitoring of nitrogen compounds were combined to a three level control pattern. Though on-line measurement of substrate and product showed substantial response time it could be used to operate nitrification/denitrification within process boundaries.

On-line measurement of pulverized coal fineness on a 300 MWe power plant with pulsed digital inline holography

2021 ◽  
Author(s):  
Qiwen Jin ◽  
Xijiong Chen ◽  
Pei Li ◽  
Yonggang Zhou ◽  
Yingchun Wu ◽  
...  
Keyword(s):  
Power Plant ◽  
Pulverized Coal ◽  
Line Measurement ◽  
On Line

On-line measurement system of displacement with PSD sensor

2006 ◽  
Author(s):  
Yongcai Yang ◽  
Junsan Ma ◽  
Rimin Pan ◽  
Xiang Yu
Keyword(s):  
Measurement System ◽  
Line Measurement ◽  
On Line ◽  
Psd Sensor

On-line measurement of total c and 14C of 14C-Labelled organic matter

1994 ◽  
Vol 26 (3) ◽  
pp. 407-411 ◽  
Author(s):  
P. Benoit ◽  
Choné Th. ◽  
E. Barriuso
Keyword(s):  
Organic Matter ◽  
Line Measurement ◽  
On Line
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