Testing LED stroboscope and stroboscopic effect method

LED stroboscopic effect refers to the two concepts. A stroboscopic the depth of the luminous flux of electric light source fluctuation, fluctuations in depth, the greater the stroboscopic depth is larger. Second, stroboscopic effect namely the electric light source stroboscopic person visual sense to produce negative effects. The stroboscopic depth, the greater the negative effect is larger, the more serious the harm. Stroboscopic and stroboscopic effect, and types of electric light source, and its technical performance has a direct relationship. Different types and different technical performance of electric light source, the stroboscopic and stroboscopic effect degree is different also.

stroboscopic lighting source is actually a perception of a stimulus to the eyes. Perception of the human eye to light stroboscopic mainly depends on the amplitude and frequency of the guang-yuan yu brightness. Lighting source amplitude and often with amplitude modulation percentage and its brightness values. Experiments show that lighting light source frequency make the human eye can perceive different threshold percentage of stroboscopic amplitude modulation is also different. Below 15 hz frequency amplitude modulation of the demand is higher, even smaller amplitude modulation can perceive stroboscopic, but when the light source oscillation frequency reaches more than 50 hz, the human eye is imperceptible to the stroboscope. Know through the experiment, the higher the light source brightness, its critical flicker frequency will increase. In addition, if the light source imperceptible stroboscopic oscillation frequency is higher. But when using lighting light source to observe a rotating object, the human eye can perceive light stroboscope, it is not for 50 hz boundaries.

a, detection, evaluation tools stroboscopic and stroboscopic effect visual testing and evaluation tools, usually adopt special gyro stroboscopic examination.

2, detection standard

is a standard with the sun's rays. The sun light flux is smooth and stable, no stroboscopic and stroboscopic effect. Energy-saving lamp luminous flux of the smooth degree of stability, the closer to the sun, energy-saving lamps of stroboscopic depth is smaller, the smaller the stroboscopic effect harm. Third, the method of testing and evaluation

1. Under the sunlight first selected a plane, put the special detecting gyroscope on the plane rotation. Special on test gyro design, is more than black and white halo. In the whole process of spinning, the pattern on the gyro, instead of changing along with the rotation speed, but stable fixation. This kind of black and white, and stability of the fixed ring pattern, color phenomenon, showed no stroboscopic sunlight and stroboscopic effect.

　　2. Selected indoors a plane, in a vertical hanging above the lamp that high pressure mercury lamp, and many different manufacturers only brand of energy-saving lamps, and energy-saving lamp number. For high pressure mercury lamp and many different manufacturer brand of energy-saving lamps, only the implementation of independent switch control.

　　3. Light high pressure mercury lamp, will be dedicated testing gyro, under high pressure mercury lamp. Special detecting gyro will produce multichannel colour different aura, and each ring, will be as the change of gyro rotation speed, show the direction of rotation, the rotation speed, the color of random variation. This kind of pattern, color, rich change, show that high pressure mercury lamp stroboscopic and stroboscopic effect hazard is very serious.

　　4. Special testing gyro rotating lighting energy-saving lamps, respectively, respectively. Special testing gyro design, colour, will produce the phenomenon that the following changes respectively.

a, the special detecting gyro makes more than black and white halo, and black and white halo, as the change of gyro rotational speed. The direction of rotation, the rotation speed, the color does not change, stable fixation, similar effect under the sunlight. Shows that the energy-saving lamps, no stroboscopic and stroboscopic effect.

b, dedicated testing gyro produced multi-channel color different aura, and each ring, will be as the change of gyro rotation speed, show the direction of rotation, the rotation speed, the color of random changes, just with lighter color color. Shows that the energy-saving lamps still produce stroboscopic and stroboscopic effect.

c, still produce stroboscopic and stroboscopic effect harm of energy-saving lamps. Color color relatively strong energy-saving lamps, stroboscopic and stroboscopic effect damage is relatively serious. Color color relatively weak energy-saving lamps, stroboscopic and stroboscopic effect hazard is relatively less.

special gyro with stroboscopic detection, evaluation of energy-saving lamps stroboscopic and stroboscopic effect, intuitive tube, easy to operate. In actual lighting energy-saving engineering design, should choose no stroboscopic effect harm of green light source, to build a bright, clear and comfortable lighting environment. The bang

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