High-power light-emitting diode (LED) impulse adjustable stroboflash device

Abstract

The invention provides a high-power light-emitting diode (LED) impulse adjustable stroboflash device, comprising a display and input unit, an impulse generation unit, a drive and amplification unit and an LED luminescent unit. A liquid crystal display (LCD) and keyboard input unit inputs impulse width, impulse interval and trigger delay, field programmable gate array (FPGA) is used for designing a synchronous impulse generation circuit, and a high-power LED is used as a lighting source, wherein the LCD and keyboard input unit sets impulse width, impulse interval, trigger time and duty cycle, sets information and sends the information to the impulse generation circuit; the impulse generation circuit generates corresponding impulse according to the set impulse information to the LED drive and amplification circuit so as to perform LED flash. The device controls the LED to flash by adopting synchronous trigger technology, and triggers a high-speed camera, a streak camera and other camera devices to start a shutter for capturing instant information. The LED lamp is in a closed sate when no trigger impulse is generated so as to realize energy conservation and environmental protection.

Description

technical field [0001] The invention relates to a light source lighting device in a measurement and monitoring system in the field of ultrafast phenomena, especially a pulse-adjustable stroboscopic lighting device. Background technique [0002] In the research fields of fluid mechanics, detonation physics, and engineering practice, it is often necessary to measure the speed, take pictures, and control parameters of fast-moving objects such as high-speed flying projectiles, explosive properties, fragments when objects explode, and high-speed rotating shafts. , due to the extremely high speed of the object, a high-speed camera must be used to record and observe it. However, most of these objects cannot emit light by themselves. When measuring, a supporting lighting device and a precise synchronous control system are required to make the image recording equipment photosensitive and imaged. It is against this background that the design of high-power LED pulse can strobe device....

AI Technical Summary

Problems solved by technology

[0003] Most of the existing stroboscopic light-emitting devices on the market are mainly used to measure the rotational speed and surface defects, which determines the flash pulse width (millisecond level) and the slow flash frequency; Electronic tubes, so the life of the flash will not be too long; these flash devices generally do not have a trigger pulse output, so it is difficult to cooperate with other equipment such as photographic devices to take instant photos

In addition, the flash pulse precision of these strobe devices is low, generally on the order of milliseconds, and cannot be used for high-precision scientific research, especially for measuring high-speed moving objects

Images