Light Intensity Time Scale Detector and Its Calibration Method for Timing Diagnosis of Rotating Mirror Framing Camera

Abstract

The invention discloses a light intensity time scale detector for timing diagnosis of a rotating mirror framing camera. Corresponding to two different photos, it is used to collect the light intensity and measure the photo taking time corresponding to the installation position; the light intensity detector is used to receive the light intensity signal collected by the light probe; the photoelectric conversion module is used to collect the light intensity signal collected by the light intensity detector The light intensity signal is converted into an electrical signal; the timing detection system includes an oscilloscope and an acquisition control module, the oscilloscope is used to receive the electrical signal converted by the photoelectric conversion module and displays the waveform of light intensity changing with time, and the acquisition control module is used to acquire the signal in the oscilloscope and processing, read out the waveform data and analyze the time. The invention also discloses a calibration method for the light intensity time scale detector. The invention can realize quick debugging of photographing sequence before experiment, monitoring of photographing time during experiment and diagnosis of light intensity change of photographed object.

Description

Technical field [0001] The present invention relates to the field of optical transient testing, and specific to the optical intensity time label detector and the calibration method thereof in the timing diagnosis of the transfer shaft display camera. Background technique [0002] High-speed substances are important experimental diagnostic techniques for studying high-speed dynamic physical phenomena, and have important application value in scientific research. Among them, the transfer of mirror-type high-speed photography technology is widely used in explosive mechanics, breaking mechanics, impact kinetics, etc. due to its high resolution, high imaging space. The field is one of the main means of studying microsecond / ten microsecond magnitude dynamic physics. [0003] The transfer of mirror-type high-speed photography techniques due to its mechanical structure, the amount of photographic time is large, so it is necessary to determine the imaging time of each image by other meth...

AI Technical Summary

Problems solved by technology

[0004] However, the time-scale detonator method has some obvious deficiencies: first, the time accuracy is low. The time accuracy of the time-scale detonator method is equivalent to the interval of high-speed photography, and the uncertainty is large, which cannot meet the needs of precise physical experiments; the second is the risk factor. High, the time-scale detonator is detonated by a high-voltage electrical signal, there are certain safety hazards, and ordinary laboratories do not have the relevant safety guarantee conditions; third, the economy is not enough, the price of the time-scale detonator is relatively expensive, and it is a consumable in the experiment. The cost is significantly increased; the fourth is that debugging takes a lot of time. During the debugging process, it is necessary to use a fake detonator combined with a film for rough timing adjustment. The phase washing process is time-consuming and laborious, and the experimental efficiency is low.

However, the signal source of the laser time-marking system of the invention is the object side in the field of the photographed object, which cannot be reused at one time, and the terminal signal of the laser time-marking system still uses the film, and the acquisition effect is greatly affected by the final effect of the film. , signal accurate discrimination is also relatively large

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