Demystifying the internal structure and working principle of the computer moving head light


For details, the computer shakes the headlight is a high-tech product integrating electronics, machinery, and optics. The qualified computer shakes the headlight, which must be stable and reliable, excellent in light, accurate positioning, and good heat dissipation. The lamp body and material structure meet the requirements of human -machine engineering.Computer shake headlights can be divided into 250W, 575W, 1200W and other varieties from the size of the computer.1200W is the main lamp type of professional performance focus venues.This article on analyzing the structure principle of 1200W headlights. In summary, the computer light shaking the head is composed of three major systems: optics, machinery, electrical and programming. The three major systems are interconnected and organically combined to meet, light, needs speed, direction, effect, effect, heat dissipation, noise, positioning and other elements. I. The design of optical system optical systems mainly considers the use of optical source of optical source. Specific expression indicators include the strength, uniformity, saturation, and light spots of light. There are two elements that affect the above indicators, one is the light source, and the other is the optical system structure and material selection.At present, domestic and foreign manufacturers and users basically recommend OSRAM or PHILIPS 1200W short arc dual -end metal gas discharge lamp tube.Its characteristics are compact, high brightness, high color temperature, good color light rendering sources, and the process of darkness, which can maintain relatively stable color temperature. The disadvantage is that the layered problem of the filling in this kind of lamp, that is, the envelope appears in the arc imaging or condense in the arc tube to form a shadow effect .It is necessary to control the minimum range during optical structure design.In the optical structure, in order to obtain a uniform hybrid beam, a reflective mirror of the parabolic surface can be used. To collect divergent or narrow beams, you should choose a reflective mirror with scale processing or surface texture.The reflector system made of mirror reflective materials is better than the refraction system.When you need to get several beams from a light source, a refractive system of a prism or lens combination can be used. At present, the optical design of the 1200W head of the head of the head at home and abroad is composed of a lens combination, consisting of non-spherical (ie parabolic surface) quartz lenses.The most important feature of parabolic face lens is to place a point light source on the focus, which will get a parallel beam.In the design of the light road, it is also necessary to consider the relationship between the light -strong distribution curve, shape and light source, the diameter size of the reflex lens and the shape of the light source. Second, the mechanical system has a wide range of mechanical systems, including materials, str ucture, mechanical performance, shell requirements, heat dissipation requirements, and so on. The main considerations of the selection of lamp materials are: to meet the functional requirements of the lamp, to create difficulty and economical. At present, the materials of the international and domestic 1200W shaking lights are mainly steel, plastic, and aluminum alloy.Under the premise of considering the overall function of satisfying the light, the structure model of the design light is divided into different parts and different materials.For example, ACEDA002020II11 shakes the headlights, the lamp shell is plastic, the lamp body support frame, base, side plate, and end plate uses aluminum alloy castings, punching parts, and car parts. The structure of the lamp determines its mechanical performance, heat dissipation, strength , noise, weight and other elements. The international and domestic 1200W headlights are supported by the arm support structure. The horizontal rotation of the l ights is 540 °, and the vertical rotation is rotated to 255 °. The mechanical properties of the lamp body are mainly reflected in the mechanical strength of the lamp body component. During the continuous and effective working period of the lamp, the lamp body does not deform, wear -resistant, corrosion resistance, seismic, and compression. Waterproof, dustproof, anti -static, moisture -proof requirements. Different from the degree of dustproof and waterproof levels of different shells of the protection level requirements: If the protection requirements of the computer lamp used indoors are usually IP20, the protection requirements of outdoor computer lamps are usually IP44.1200W high -power computer light machinery The structure and heat dissipation requirements are very important. If there is defect in the heat dissipation usually cause system, it The drift of electrical parameters, the color of the color, the film, the plaques, and the serious consequences of crash, loss, and uncontroll ed.3. Electrical and programmed control parts 1. The electrical characteristics and circuit design of the computer shake the headlights The vast majority of the 1200W head of the head of the head in the world before the design of the circuit design uses rare gas discharge bubble light sources. The start and stable work of gas discharge bubbles depends on the choice of electrical components such as circuit type, power supply, and ballasts. After the rare gas discharge bubble is started, it generally does not require a stable time. To ensure stability, the difference between the maintenance voltage of the circuit and the instantaneous voltage of the light bulb should be sufficiently large. The laxation, stability, extinguishing, and starting start of the light source should design circuits according to the characteristics of the light source .The starting voltage of rare gas discharge bubbles is very high. It is required to use a transformer, startup device, and a semi-resonant circuit to i improve the instant start voltage. The stability after the light source starts depends on the matching of the ballast and the circuit parameters. The basic function of a town is to prevent current out of control and make the light source work under its normal electrical characteristics. At present, there are two types of ballasts in manufacturers, one is an inductance rectifier, and the other is an electronic rectifier. The advantage of the inductor rectifier is that the stability is good, and the disadvantage is that the strength, handling, and loading and unloading of the lamp body are high; the electronic rectifier is essentially the power conversion circuit. Change. Its advantages are light weight, easy to load and unload, and handle; the disadvantage is that the structural design requirements are high and the maintenance cost is high. The re-activation of the light source. In the conventional circuit design, due to the high temperature during the gas discharge bubble work, the steam pres sure resistance is formed by the intra -watering gas in the bubble. It is difficult to realize the light source immediately. Then it can trigger the restart. At present, international and domestic production enterprises have basically adopted conventional circuit design. 2. The current international and domestic computer lights generally use DMX data format to write program files.The principle of DMX512: The speed of DMX data stream is 250K, that is, each BIT is a standard 4 microsecond.DMX's data format is divided into the following parts: 1) IDLE (idle) or no dmx site: When there is no DMX packet output, it will be a high level signal;A 88 microsecond low -level output forecast {head}; 3) Mark after break (MAB): MAB is a high -level high level or two pulses after MAB is Break;Code: SC is a channel data at the beginning of the data stream. It has the same format as the channel data, generally 11 pulses or 44 microseconds; 5) Mark Time Between Frames (MTBF): MTBF can be 0-1 second, less t han 1 secondIn seconds, you can use MTBF to be high level before the starting position of each channel; 6) Channel Data (CD): Channel data fiery logic format after SC is 1-512 or less than 512; 7) Mark Time BetweenPackets (MTBP): Send a high level after the valid data is sent. The effect of computer lights is produced through different styling scenes, different color changes, and different perspectives, horizontal, and vertical light angles changes and fast speeds, slow flickering, changes in the aperture, and focal length changes. All these attribute indicators are implemented by the transmission of the motor. The electrical operation parameters of the step motor define the programming, and the computer light control is completed..

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