Electric light source stroboscopic effect hazard and solution
I. Overview of stroboscopic and stroboscopic effects of electric light sources
The stroboscopic and stroboscopic effects of electric light sources have brought serious harm to our work and life. However, when we applied the electric light source, we did not attract the attention and correct understanding.
The stroboscopic and stroboscopic effects are two mutually causal physical quantities for the magnitude of the electric light source, the fluctuation depth of the luminous flux, and the resulting harmful effects (called stroboscopic effects). Strobe is the depth at which the luminous flux of an electric source fluctuates. The greater the fluctuation of the luminous flux, the more severe the stroboscopic. The depth of fluctuation of the luminous flux of the electric light source is directly related to the technical quality of the electric light source.
The magnitude of the fluctuation of the luminous flux of an electric source is usually described by a percentage. At this stage, the widely used electric light source, such as the magnetic ballast driven T8 (26mm) straight tube fluorescent lamp, high pressure mercury lamp, high pressure sodium lamp, metal halide light flux fluctuation depth of up to 55%-65%. Some energy-saving lamps with poor technical quality on the market still have stroboscopic depths of up to 20%-30%.
The stroboscopic effect refers to the harmful effect of the electric light source caused by the fluctuation of the luminous flux, that is, the harmful effect caused by the stroboscopic light. The more severe the strobe of the electric light source, the more serious the stroboscopic effect is.
A Tool for visually identifying and stroboscopic and stroboscopic effects of energy-saving lamps, usually using stroboscopic gyro. The stroboscopic and stroboscopic effects of the identification and *price energy-saving lamps are based on sunlight. The luminous flux of sunlight is smooth and stable, and there is no stroboscopic and stroboscopic effect. The luminous flux of the energy-saving lamp is smooth and stable, and the closer to the sunlight, the smaller the stroboscopic depth of the energy-saving lamp, and the smaller the stroboscopic effect is.
Second, the performance of the stroboscopic effect of the electric light source
(1) Initiating a work accident
When the stroboscopic frequency of the electric light source is in integral multiple with the speed of the moving object, the moving state of the moving object will produce static, reverse, slow moving speed, and the erroneous vision of the above three states periodically repeating, causing a work-related accident. For example, the sewing machine operator in the garment industry, the needle that moves up and down at high speed, is illusory to a static state, and the finger is inadvertently injured.
(2), resulting in low production efficiency
The stroboscopic effect can cause visual nerve fatigue and migraine. In particular, high-pressure mercury (sodium) lamps and metal halide lamps have been widely used in the machinery industry. T8 (26mm) straight tube fluorescent lamps driven by magnetic ballasts commonly used in light industry, food, printing, electronics, textile and other industries. The stroboscopic effect is seriously jeopardized and the production efficiency is low. For example, plug-in operators on the assembly line are prone to migraine due to visual fatigue, vertigo, and difficulty in positioning.
(3), hurt the eyes of teenagers
After the 1980s in China, T8 (26mm) straight tube fluorescent lamps driven by magnetic ballasts are commonly used in homes, schools, libraries, etc. Due to the serious stimuli of the lighting environment, the growing primary and secondary school students suffered greatly, the visual acuity decreased significantly, and myopia increased significantly.
Third, how to eliminate the problem of stroboscopic and stroboscopic effects of electric light sources
The fundamental technical countermeasure for eliminating the stroboscopic and stroboscopic effects of the electric light source is to increase the driving electric power frequency of the discharge light of the illuminant of the driving electric light source, so as to reach 40KHZ or more. Compared with energy-saving lamps, the technical measure to eliminate the stroboscopic and stroboscopic effects is to increase the electronic ballast, AC-DC-AC (AC-DC-AC) conversion frequency. Scientific calculations, and verified by practical application: electronic ballast AC-DC-AC conversion frequency, up to 40 thousand weeks (KHZ) or more (CE certification also provides 40 thousand weeks). The stroboscopic depth of the energy-saving lamp can be limited to 5% or less. The luminous flux emitted by the energy-saving lamp will form a smooth and stable effect in the human vision, and no longer cause stroboscopic effects.
Fourth, how to identify and select
1. First select a plane under the sun and rotate the dedicated detection gyro on the plane. The special detection pattern on the gyro is a multi-channel black and white halo. In the whole process of rotation, the pattern on the gyro does not change with the speed of rotation, but is stably fixed. This black and white, and stable fixed aura pattern, color phenomenon, indicates that the sun has no stroboscopic and stroboscopic effects.
2. Select a plane in the room, vertically hang a high-pressure mercury lamp and a number of energy-saving lamps of different manufacturers on the top, and number the energy-saving lamps. Independent high-voltage mercury lamps and a number of different manufacturers of energy-saving lamps, independent switching control.
3. Light the high-pressure mercury lamp and rotate the special detection gyro under the high-pressure mercury lamp. The dedicated detection gyro produces multiple halos of different colors, and each aura will exhibit a random change in the direction of rotation, rotation speed, and color as the rotation speed of the gyro changes. This rich pattern of patterns and colors indicates that the stroboscopic and stroboscopic effects of high-pressure mercury lamps are very harmful.
4. Light up the energy-saving lamps separately, and rotate the dedicated detection gyro separately. Dedicated detection of the pattern and color of the gyro will produce the following changes.
A: If the dedicated detection gyro only produces multiple black and white halos, and the black and white halo, as the rotation speed of the gyro changes, its rotation direction, rotation speed, color change, stable and fixed, similar to the effect under the sun. , indicating that this energy-saving lamp has no stroboscopic and stroboscopic effects.
B: If the dedicated detection gyro produces multiple halos of different colors, and each aura will show a random change in the direction of rotation, rotation speed, and color as the rotation speed of the gyro changes, only the color is light. It shows that this energy-saving lamp still produces stroboscopic and stroboscopic effects.
Among the energy-saving lamps that still produce the stroboscopic and stroboscopic effects, the energy-saving lamps with relatively thick color and color, the stroboscopic and stroboscopic effects are relatively serious. Energy-saving lamps with relatively light color, stroboscopic and stroboscopic effects are relatively light.
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