Directivity and effective diameter measurement method of the hydrophone in ultrasound field

2021 ◽  
Author(s):  
Song Hu ◽  
Haijiang Zhu
Keyword(s):  
Measurement Method ◽  
Effective Diameter ◽  
Diameter Measurement ◽  
Ultrasound Field

Analysis of the Pitch Diameter Measurement Based on Three-Pin/T-Shaped Probe and Thread Scanner

2014 ◽  
Vol 644-650 ◽  
pp. 1307-1312
Author(s):  
Yu Zhang ◽  
Yue Wang ◽  
Xing Yu Yao
Keyword(s):  
Experimental Data ◽  
Measurement Uncertainty ◽  
Measurement Method ◽  
Measurement Methods ◽  
Data Consistency ◽  
Maximum Difference ◽  
Diameter Measurement ◽  
Application Program ◽  
Actual Size ◽  
Methods Of Measurement

To study the data consistency of Three-pin/T-shaped probe and thread scanning measurement. Through the analysis and summary of the measurement methods and experimental data obtained in two methods of measurement uncertainty can meet the thread gauge diameter measurement requirements. Experiment to obtain the maximum difference of the actual size of the corresponding point of 1.1μm, verify the correctness of the two thread measurement method and propose the appropriate application program.

Remote Internal Diameter Measurement of Ring Gauge Based on a Low-Coherence Tandem Scheme

2012 ◽  
Vol 516 ◽  
pp. 533-538
Author(s):  
Dong Wei ◽  
Nan Wu ◽  
Kiyoshi Takamasu ◽  
Hirokazu Matsumoto
Keyword(s):  
Measurement Method ◽  
Michelson Interferometer ◽  
Standard Uncertainty ◽  
Internal Diameter ◽  
Diameter Measurement ◽  
Network Systems ◽  
Present Measurement ◽  
Transmission Grating ◽  
Low Coherence ◽  
Relative Standard

A novel internal diameter measurement method based on a low-coherence tandem scheme is firstly demonstrated. From operational analysis, it is understood that a low-coherence tandem scheme can be served for internal diameter evaluation by using a combination of a transmission grating and a ring gauge instead of a classical Michelson interferometer to store and transmit the internal diameter information. As a result of the experiment, in the present experimental environment, diameter measurement of several millimetres with a relative standard uncertainty of several micrometres was performed. Taken together, these results suggest that the present measurement method is expected to be used as a powerful remote internal diameter calibration tool for next-generation calibration network systems.

scholarly journals Proposal of Pupil Diameter Measurement Method and Restraint Stress in Albino Rats for Estimate of Autonomic Nervous System

2020 ◽  
Vol 32 (3) ◽  
pp. 83-89
Author(s):  
Natsuki Uchida ◽  
Ayako Katoh ◽  
Hiroki Kamijo ◽  
Kazunori Yamazaki ◽  
Hirohito Sumikura ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Restraint Stress ◽  
Measurement Method ◽  
Pupil Diameter ◽  
Albino Rats ◽  
Diameter Measurement ◽  
Autonomic Nervous

scholarly journals Harmonization of Piece-by-Piece Measurement Methods of Roundwood Approved by Latvian Standard LVS 82:2003 “ Apaļo kokmateriālu uzmērīšana ”

2015 ◽  
Vol 1 ◽  
pp. 154 ◽  
Author(s):  
Ziedonis Miklašēvičs
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Measurement Methods ◽  
Surface Shape ◽  
Application Area ◽  
Diameter Measurement ◽  
Short Intervals ◽  
Measuring Accuracy ◽  
Round Timber

This paper analyses the volume differences of mixed pine and spruce roundwood loads and logs (roundwood assortiments) devided in to sample clusters according to the species, diameter, lenght and stem/log surface shape, stem zones and measured by the methods approved by standard LV 82:2003 „Apaļo kokmateriālu uzmērīšana”. The volumes of roundwood loads/logs determined by these methods were compared with the most precisious determination of the volume by Measuring Diameter in Short Intervals and the Top and Butt Diameter Measurement method. The volume of mixed pine and spruce round timber load determined by Measuring Diameter in Short Intervals using harvester measurement system is 2.44% higher than the volume determined by manual comparative the Top and Butt Diameter Measurement method. The volume deviation is in the range of accepted 3% measuring accuracy. The volumes of roundwood assortiments from neiloid zone of spruce stems determined according to the Mid Diameter Measurement method are 3.96% lower than the volumes determined by careful manual the Top and Butt Diameter Measurement method. The volume deviation surpass the acceptable measuring 3% accuracy. The volumes of roundwood assortiments from paraboloid zone of spruce and pine stems determined according to the Mid Diameter Measurement method are lower than the volumes determined by the Top and Butt Diameter Measurement method. The deviation is in the range of acceptable 3% measuring accuracy. This paper gives recommendations for adjusting the application area of different measurement methods for achieving the volume deviation in the range of accepted measuring accuracy.

218 Variability in aortic diameter measurement by different imaging techniques

1999 ◽  
Vol 1 ◽  
pp. S16-S16
Author(s):  
M MATEOS ◽  
A EVANGELISTA ◽  
A SALAS ◽  
M SEBASTIA ◽  
R DOMINGUEZ ◽  
...  
Keyword(s):  
Imaging Techniques ◽  
Aortic Diameter ◽  
Diameter Measurement
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