Optical Velocity Measurement System

1962 ◽  
Vol 71 (12) ◽  
pp. 925-926
Author(s):  
Gordon F. Blizard
Keyword(s):  
Measurement System ◽  
Velocity Measurement ◽  
Optical Velocity

A high precision in-bore velocity measurement system of railgun based on improved Bi-LSTM network

Measurement ◽  
2021 ◽  
Vol 169 ◽  
pp. 108501
Author(s):  
Songcheng Li ◽  
Junyong Lu ◽  
Long Cheng ◽  
Delin Zeng
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Velocity Measurement ◽  
Lstm Network

A Low Cost Velocity Measurement System Design for Rotary Machinery

2010 ◽  
Author(s):  
Cagatay Cakir ◽  
Hasan Koruk ◽  
Burak Ulas
Keyword(s):  
System Design ◽  
Measurement System ◽  
Velocity Measurement ◽  
Practical Problem ◽  
Low Cost ◽  
Measurement Systems ◽  
Rotary Machinery ◽  
Measurement Devices ◽  
Motorized Vehicles ◽  
Sufficient Precision

Today, as the importance of system automation increases, measurement systems become more and more important. Consequently, in many applications, from washing machines, motorized vehicles, robots to nuclear turbine reactors, velocity measurement is inevitable. In industry, velocity is widespreadly needed to be measured. Besides that researchers through the globe need such measurement devices in their studies. On the other hand, to be able to make a correct measurement, it may be needed to pay much on measuring equipments while the economical issue is sometimes the reason for the research does not continue on or even not begin. So, it has always been a practical problem for both industry and researchers not to be able to measure the rotating velocity of machinery with both sufficient precision and low cost. In this paper, a very low cost but still precise velocity measurement system design is introduced, explained and discussed. First, building up of the sensor circuit and basic components of the system are introduced. Then, data acquisition and signal processing of the system are explained. Finally, advantages of the system are discussed and some conclusions are given.

Study on Velocity Measurement of Gas/Solid Flow Based on Electrostatic Sensor

2014 ◽  
Vol 614 ◽  
pp. 275-278
Author(s):  
Yu Tang ◽  
Xiang Deng ◽  
Shuo Tian
Keyword(s):  
Measurement System ◽  
Velocity Measurement ◽  
Flow Measurement ◽  
Cross Correlation ◽  
Low Cost ◽  
High Sensitivity ◽  
Two Phase ◽  
Solid Flow ◽  
Correlation Algorithm ◽  
Electrostatic Induction

Electrostatic sensor is based on the principle of electrostatic induction. It is widely used for gas/solid two-phase flow measurement because it has the advantages of simple structure, high sensitivity, low cost, etc. In this paper, a velocity measurement system of gas/solid flow based on electrostatic sensor and cross-correlation algorithm is discussed. Electrostatic sensor with circular electrode is adopted. By COMSOL optimum simulation, the axial length of the electrode is designed. The signal conditioning circuits are discussed and cross-correlation algorithm is analyzed. The initial experimental results demonstrate that the velocity measurement system of gas/solid flow designed in this paper is feasible.

Research of the High-Precision Dual-Channel Sound Velocity of Seawater Measurement System

2014 ◽  
Vol 668-669 ◽  
pp. 940-943
Author(s):  
Bao Feng Zhang ◽  
Zi Ming Xie ◽  
Zhi Wei Li ◽  
Jun Chao Zhu
Keyword(s):  
Sound Velocity ◽  
High Precision ◽  
Measurement System ◽  
Velocity Measurement ◽  
Time Interval ◽  
Interval Measurement ◽  
Dual Channel ◽  
Precision Time ◽  
Time Interval Measurement ◽  
Time Of Flight Method

For single channel sound velocity measurement system accuracy was generally not high,a high-precision dual-channel sound velocity of seawater measurement system was designed.Based on ultrasonic speed of sound measurement in seawater with time-of-flight method,the system used ARM microcontroller to combine with high-precision time interval measurement chip,and the sound velocity measurement was translated into distance and time measurement. Then the influence of the time delay of the system was eliminated by method of difference.The paper introduced the modules of the system,and the high-precision time interval measurement method as the key technology of time-of-flight method for the velocity measurement system was expounded.It wasproved by experiment that the measurement accuracy of the system on the velocity reached 0.019m/s.

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