Study on aircraft speed measurement method based on computer vision of high-speed camera

2020 ◽  
Author(s):  
Zhang Yifei ◽  
Feng Can ◽  
Liu Yayan ◽  
Li Ruijie ◽  
Lei Aiqiang
Keyword(s):  
Computer Vision ◽  
High Speed ◽  
Measurement Method ◽  
High Speed Camera ◽  
Speed Measurement

Research on the Measurement Method of the Sub-Pixel Image Motion Based on Optical Correlator

2011 ◽  
Vol 271-273 ◽  
pp. 7-12
Author(s):  
Chao Fan ◽  
Tie Jun Yang ◽  
Hong Liang Fu ◽  
Yi Tao Liang
Keyword(s):  
Measurement Error ◽  
High Speed ◽  
Measurement Method ◽  
Frame Rate ◽  
Image Motion ◽  
High Speed Camera ◽  
Joint Transform Correlator ◽  
Experiment Platform ◽  
Pixel Image ◽  
Set Up

To measure the sub-pixel image motion of the sequence images which are captured by the high-speed camera at the high frame rate with poor SNR, the joint transform correlator (JTC) is used. The relative image motion of the two adjacent images can be measured by inputting these images into the correlator. The principle of this method is described, and the effect of the defocussing of the CCD in the JTC on the accuracy is analyzed. To research the measurement performance of the JTC concretely, the experiment platform is set up. By using different images with different image motion, the results showed that, the JTC can measure the sub-pixel image motion entirely even for the images with SNR=1, and the measurement error submits to the normal distribution, which implies zero mean and the RMS is no more than 0.12 pixel under the conspicuous level is equal to 0.05.

Study of Velocity Measurement Error Analysis and Improving Velocity Measurement Accuracy on High-Speed Train

2014 ◽  
Vol 596 ◽  
pp. 468-471
Author(s):  
Tao Hou ◽  
Duo Wang Fan ◽  
Hong Xia Niu
Keyword(s):  
Measurement Error ◽  
Error Analysis ◽  
Velocity Measurement ◽  
High Speed ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Measuring System ◽  
High Speed Train ◽  
Speed Measurement ◽  
Velocity Measuring

For the problem of a big velocity measurement error,analyzed the velocity measurement error and studied the method of improving velocity measurement accuracy for the velocity measuring system of high-speed train.In this analysis and method, the speed error analysis was carried out based on understand the characteristics of the high-speed train speed sensor, and found that there is a bigger error. Then discussed the influence of large errors of the control system, and then put forward the improved M/T speed measurement method to solve the error problem. Finally, calculated velocity-measuring error for the improved M/T speed measurement method. The results show that the accuracy of speed has improved greatly. The research method can improve the accuracy to meet the requiring of train safety and smooth run.

scholarly journals Current-limiting amplifier for high speed measurement of resistive switching data

2021 ◽  
Vol 92 (5) ◽  
pp. 054701
Author(s):  
T. Hennen ◽  
E. Wichmann ◽  
A. Elias ◽  
J. Lille ◽  
O. Mosendz ◽  
...  
Keyword(s):  
Resistive Switching ◽  
High Speed ◽  
Limiting Amplifier ◽  
Speed Measurement ◽  
Current Limiting
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