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Three-dimensional Velocity Measurement Method of Instantaneous Optical Pulse

A velocity measurement, three-dimensional technology, applied in the field of instantaneous optical pulse three-dimensional velocity measurement, can solve the problem of lack of effective methods to observe the three-dimensional development velocity of instantaneous optical pulses such as lightning

Active Publication Date: 2021-05-04
ARMY ENG UNIV OF PLA
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  • Application Information

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Problems solved by technology

[0005] Therefore, the problem existing in the prior art is: the lack of an effective method for observing the three-dimensional development speed of instantaneous light pulses such as lightning

Method used

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  • Three-dimensional Velocity Measurement Method of Instantaneous Optical Pulse
  • Three-dimensional Velocity Measurement Method of Instantaneous Optical Pulse
  • Three-dimensional Velocity Measurement Method of Instantaneous Optical Pulse

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Embodiment Construction

[0026] Such as figure 1 As shown, the instant optical pulse three-dimensional velocity measurement method of the present invention comprises the following steps:

[0027] (10) Calibration of camera imaging pixel distance: High-speed camera A and ordinary camera B take pictures of calibration objects with known height and width respectively at the height and distance of photographing; Number, respectively calibrate the actual size represented by the imaging pixels of high-speed camera A and ordinary camera B;

[0028] The schematic diagram of pixel distance calibration and calculation interval division is as follows figure 2 As shown, the laboratory long-gap discharge experiment is taken as an example. Place the high-speed camera A and the ordinary camera B at the height H and the distance L from the calibration object, and take pictures of the calibration object with known height h and width w. Obtain the number of pixels n occupied by the height and width of the calibrati...

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Abstract

The invention discloses a method for measuring instantaneous light pulse three-dimensional velocity, comprising the following steps: (10) camera imaging pixel distance calibration, (20) optical channel shooting, (30) development time calculation, (40) development height calculation, (50) Calculating the horizontal distance in the first vertical plane, (60) calculating the horizontal distance in the second vertical plane, (70) calculating the three-dimensional development distance, and (80) calculating the three-dimensional velocity. The method for measuring the three-dimensional speed of the instantaneous light pulse of the invention can effectively measure the three-dimensional development speed of the instantaneous light pulse such as lightning.

Description

technical field [0001] The invention belongs to the technical field of lightning observation, in particular to an instantaneous light pulse three-dimensional speed measurement method capable of effectively measuring the three-dimensional development speed of lightning and other instantaneous light pulses. Background technique [0002] The development speed of lightning is a very important parameter in the study of lightning protection, which determines the rate of change of the ground electric field caused by the descending leader, and has an important influence on the initiation of the grounding structure connecting the leader. In addition, once the upward leader starts from the grounded structure under the influence of the downward step leader, whether the upward and downward leaders are connected is also related to the relative speed of the two. Therefore, in the study of lightning protection, the observational analysis of the development speed of the upward leader starti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J7/00
CPCG01J7/00
Inventor 张琪石立华陈海林邱实李云王建宝罗小军黄立洋
Owner ARMY ENG UNIV OF PLA