摇头电脑灯的构造原理（The construction principle of computer lamp with shake head）

摇头电脑灯的构造原理（The construction principle of computer lamp with shake head） 摇头电脑灯的构造原理(The construction principle of computer lamp with shake head) Shake the head computer light structure principle,.Txt can hold up, put down, called weight lifting, lifting can not put down, called weight. The head should have courage, and rise to have the spirit. Learn to add, pride to subtract, opportunity to ride, sloth to divide. The three problems of life: thinking, love, Unrequited love. Professional shake head computer light is a collection of electronics, machinery, optics as one of the high-tech products. Qualified professional shake head computer lamp, must be stable and reliable, light efficiency, accurate positioning, good heat dissipation, light and material structure in line with ergonomic requirements. Professional shake head computer light from the use of power size can be divided into 250W, 575W, 1200W and other varieties. Among them, 1200W is the main lamp type of professional performance place. This paper focuses on the analysis of the structure principle of 1200W shake head lamp. To sum up, shaking the computer light is made up of three major systems: optics, mechanical, electrical, and program control. The three systems are interrelated and organically combined to meet the needs of light, color, speed, direction, effect, heat dissipation, noise, positioning, and so on. I. optical systems The luminous efficiency of light source is mainly considered in the design of optical system. Specific indicators include light intensity, uniformity, saturation, spot size. There are two factors affecting the above indexes, one is light source, the other two is optical system structure and material selection. At present, domestic and foreign manufacturers and users basically recommend OSRAM or PHILIPS 1200W short arc double end metal gas discharge tube. Its characteristics are compactness, high brightness, high color temperature, good color rendering, and stable color temperature in the process of dimming the lamp source. The disadvantage is that the problem of delamination of the filler in the tube is that the filler appears in the arc imaging ribbon or condenses in the arc tube to form a shadow effect, which needs to be controlled in the minimum range when the optical structure is designed. In the optical structure, in order to obtain a uniform mixed beam, a parabolic reflector can be used to collect divergent or narrow beams, and a mirror with scale or surface texture should be selected. A reflector system made of specular material is better than a refracting system. A refracting system that uses prisms or lenses when it is necessary to obtain several beams from a light source. At present, the optical design of 1200W head shaking computer lamp both at home and abroad is made up of lens combination, which consists of aspheric surface (paraboloid), quartz lens and so on. The most important feature of a parabolic lens is that a point light source is placed at the focus, and a parallel beam is obtained. In the optical path design, the relation between the intensity distribution curve, the shape and the size of the light source, the caliber of the reflecting lens, the size and the shape of the light source must be considered. Two. Mechanical system Wide range of mechanical systems, including materials, structures, mechanical properties, shell requirements, heat dissipation requirements, and so on. The main considerations of the selection of lamps and lanterns are to meet the functional requirements of the lamp, the ease of manufacture and the economy. At present, the international and domestic 1200W shake head lamps are mainly made of steel, plastic and aluminum alloy. Considering the overall function of the lamp, the structure model of the lamp is designed. Different parts are used and different materials are adopted. Such as Aceda-spot, 1200III, 1200W shake head lamp, lamp body shell with plastic parts, The lamp support frame, the base plate, the side plate and the end plate adopt aluminum alloy castings, pressing parts and car parts. The structure of the lamp determines its mechanical properties, heat dissipation, intensity, noise, weight, and other factors. The international and domestic 1200W shake head lamps are all supported by two arms. The horizontal rotation of the lamp body is 540 degrees, the vertical rotation reaches 255 degrees, and the base part needs to be strengthened to meet the requirement of hanging upside down of the shake head lamp. The mechanical properties of the lamp body, mainly reflected in the mechanical strength of the lamp body parts, the lamp body is in continuous working time, no deformation, wear resistance, corrosion resistance, earthquake resistance and compressive; the lamp shell must have strict waterproof and dustproof, anti-static, waterproof requirements. According to the protection requirements of waterproof and dustproof degree is divided into different housing: such as computer lights for indoor use protection level is usually IP20, door lights outside the computer level is usually IP44. The mechanical structure of high power 1200W computer lamp, heat dissipation system requirements is crucial, such as a defect, usually caused by electrical parameter drift, color film, rupture of plaque, which crashes, out of step, out of control and other serious consequences. Three electrical and program control 1 、 shake head computer lamp electrical characteristics and circuit design At present, the worldwide professional 1200W shake head computer light, most of the use of rare gas discharge bubble light source. The initiation and stabilization of the gas discharge bubble depends on the design of the circuit type, the selection of the electrical components such as the power supply and the ballast. Rare gas discharge bubble after the start, do not need stable time, in order to ensure the stabilization in the AC cycle, the difference between the circuit voltage and instantaneous voltage to maintain the lighting should be sufficiently large. The starting, stability, extinguishing and restarting of light source should be designed according to the characteristic requirements of light source. The starting voltage of the rare gas discharge bubble is very high. It is necessary to use the transformer, the startup device and the semi resonant circuit to improve the instantaneous start voltage. The stability of the light source after starting depends on the matching of the ballast and the electrical energy parameters. The basic function of the ballast is to prevent the current from running out of control and to make the light source work under its normal electrical characteristics. At present, the production enterprises usually use two kinds of ballasts, one is inductance rectifier, and the other is electronic rectifier. The advantages of inductive rectifier is of good stability, the disadvantage is heavy, handling, loading and unloading, the strength of the lamp body have higher requirements; electronic rectifier is essentially a power conversion circuit, the power input current frequency, waveform and amplitude of the change. The utility model has the advantages of light weight, convenient loading and unloading and conveying, and high structural design requirement and high maintenance cost. Then start the lamp, in the conventional circuit design, because the gas discharge bubble generated when the work temperature, the saturated vapor pressure of the gas bubble light resistance, immediately triggered is very difficult to achieve, must make the gas pressure inside the lamp to reduce the value of cold, can trigger a reboot. At present, the international and domestic production enterprises adopt conventional circuit design. 2, program control part At present, international and domestic computer lights commonly use DMX data format to write program files. DMX512's principle: the speed of DMX data stream is 250K,