Author: Mr. Ma Limin, general manager of Guangzhou shiquande Lighting Co., Ltd;
Ms. Wan Donghua, engineer of Guangzhou shiquande Lighting Co., Ltd;
Mr. Wang Huijun, technical manager of strode lighting Asia Co., Ltd.
1. Introduction
Digital and networked lighting control system is widely used in studio, which provides a solid foundation for the digital system of TV station. While people pay attention to the selection of dimmer brand and model, more and more professionals are focusing on the performance of dimming silicon cabinet, which is not only limited to the overload capacity of thyristor and the anti-interference index of magnetic ring, but also pay more attention to the digitization degree, network communication protocol, security backup level, status report system, dimming accuracy, voltage stabilization degree, etc Some people even consider how to make use of some characteristics of silicon cabinet to win significant returns in the long-term application and management of equipment. With a 87 year history, Stoner lighting has been leading the global professional lighting industry forward, Recently, sld96 intelligent dimming silicon cabinet has won the "eddy" industrial design award of New York in 2000 due to its international leading digital technology, fast and safe network communication and automatic voltage stabilization product characteristics. Meanwhile, due to her full load status report, high dimming accuracy, strong anti grid pollution ability, large impulse withstand value standard and more preset after A series of key advantages, such as standby site, fast control reaction time, provide superior performance / price ratio to global users.
2. Mechanical physics
The dimming silicon cabinet provides more than 80% of the light output power for the studio. The stability and safety of the lighting control in the studio are directly affected by the reasonable structure and wiring, the standard fission current impulse withstand value, the fast and reliable safety backup system, and the intelligent control degree of fans. As a world-wide dimming silicon cabinet, SLD provides two variable three-phase four wire and delta power supply mode. All silicon cabinets can use 90-277v (V), 50 / 60 Hz, three-phase can be cross connected, any wave type can be three-phase input correction, and it has obtained the European Community CE, the United States UL, Canada cul and the German TUV safety certification with particularly stringent standards. All SLD series silicon cabinets achieve simple phase balance by placing each load-bearing silicon module in different phases; the top or bottom end of the silicon cabinet is connected to the transmission bus and load wiring, and the top and side instrument cabinets are movable, providing access for all load terminals, simplifying the process of power supply access and installation of silicon cabinet module, making the installation simple; SLD module can have leakage current Protection function (RCD), which is based on each single circuit; each silicon cabinet can be set with two dmxs signal inputs in a single ID address code, and it has the function of fully matching and priority configuration of the dmxs; each cabinet is equipped with 12 analog 0-10 VDC click / dimming signal inputs, which can be assigned to any SCR circuit in the cabinet. SLD series silicon cabinet control circuit has self-test function, which can automatically detect the type of module. It only needs a start address of the system as the standard point of the system structure. The standard status report consists of a system center silicon cabinet type, B input voltage of each phase, C digital input a / b error, D silicon cabinet output level (%), e silicon cabinet overheating warning and f silicon cabinet overheating automatic closing. All internal silicon cabinet modules are zero All the devices are plug-in design, which makes the maintenance convenient and fast. The dual processor can be used to "learn" each other and share information to provide complete tracking backup for emergency control.
SLD silicon cabinet system circuit control supports user specified backup preset. When the digital input of each silicon cabinet fails, it can maintain the last level control program within the programmable time, including control logic, and then it will automatically fade into the specified backup. Each silicon cabinet has 99 preset backup fields, which is convenient for remote setting of system wide control (SWC). The preset field can be set by any DM X raw data record, and simply select the key to make it play again. The process of low noise fan from off to the highest speed and stepless speed change is completely controlled by the use of silicon cabinet, so as to minimize the noise in operation. No matter how high the load is, the temperature of each silicon module can be kept within 40 ° C and the humidity between 10-90%. If a silicon cabinet exceeds the temperature setting, the remote personal computer or control system will give a warning; if the temperature exceeds the warning point of 5 ° C, the power supply of the gate fluid control circuit will be automatically shut down. The SLD silicon cabinet system has up to 5.5kW (25a) 96 circuit or 10kW (50a) 48 circuit output power per cabinet. The standard error current rating is 100000 AIC, which is the highest level in the industry.
Three unit module
Unit module, commonly known as power drawer, is the basic structural unit of dimming silicon cabinet, and also the link and bridge between lighting load and dimming table. In addition to considering the reliability of overload protection and whether the power output of each channel meets the design requirements, the response time of thyristor, the completeness of load status report function, and the compatibility and interconnection with dimmer and internet caused by the maturity of silicon cabinet network and the universality of communication protocol have attracted more and more attention. In order to meet various installation requirements, SLD silicon cabinet provides 15A dual output, 25A dual output, 50A single output, single or bipolar circuit breaker to meet the needs of most users; optional pure electromagnetic relay provides reliable switching function for various complex load conditions, and can report service conditions; all modules (including through module) have load status Status report, and the status display provides instantaneous information. Any error information of silicon cabinet can be directly displayed on each silicon cabinet and any type of strode 300 or 500 Series console. The load status report is made by a load (wattage)- W) The control circuit allows the maximum output of a single silicon circuit to be adjusted. Due to the inherent nonlinearity of the light source itself, the naked eye can hardly distinguish any change, but the service life of the bulb can be increased 50%-100%; All silicon cabinet modules with the same current are interchangeable. The fastest response time of thyristor is 16 ms, which is the highest in the world. It can be adjusted to three different rates. The slower response can prolong the life of high-power bulb. The standard speed is suitable for most equipment, and the fast one is suitable for low-power bulb. The cabinet to cabinet data transmission is a silicon cabinet through the network data cable（ Category 5) And RJ45 connector is transmitted to another silicon cabinet, which is simple and reliable. All data communication in the cabinet is realized through the "S-bus" technology of Stoner to ensure that all silicon cabinets can be controlled quickly, accurately and safely. The preset controller of each push rod in the window view series can be combined with any silicon cabinet of SLD system without any additional electronic processor Up to 16 rooms are used, each with 15 channels.
The network technology is mature, the system is stable, and the programming is reasonable. Under the condition that the hardware structure does not change, software can also be used to upgrade the system. Because the "Shownet" system uses TCP / IP as the network communication protocol, it is adopted by most international software suppliers, such as Microsoft's windows O / s. therefore, this "Shownet" system can share its pipeline with other TCP / IP to reduce costs, increase system foresight and compatibility, and lay a good foundation for studio management to move towards information superhighway The interface controls the electronics of the silicon cabinet and provides the user programmable control logic scheme. When the system uses the Ethernet Sn Series website, the logic relationship of the silicon box control resources is specified. Each silicon cabinet has up to three network control inputs, which are configured with the highest priority or priority plug-in.
Four electronic software
The ideal dimming silicon cabinet management mode should not only prevent the pollution from the power grid, but also avoid the interference of its own working voltage to other electronic equipment in the studio, so as to achieve high-precision dimming and large-scale management. This is a technical challenge since the application of thyristor dimming technology in the 1970s, and it is also a new topic to be discussed in the field of professional lighting control in the new century. SLD silicon cabinet processor uses patented waveform analysis system, which can easily smooth dimming under the maximum current condition at the speed of 16 bits (75000 times / s). The sampling ratio is similar to that of CD audio. The accuracy rate of output voltage of the system is 0.33, which ensures the input voltage in the range of 90-240v, and the output voltage error is less than ± 1V. The dimming output consistency is internationally leading. Two kinds of high-efficiency filter chokes with rise time are available, which are 220 and 500 microseconds respectively. The density of choke used by SLD does not change even at 100A, and its efficiency is the highest among peers. The modules are marked with color and easy to identify. In terms of dimming accuracy, when many peers are providing 8-bit 256 level dimming accuracy, all SLD silicon cabinet systems have provided 11 bits The accuracy of 2000 level undoubtedly provides the lighting engineer with precise, excellent and incomparable smooth dimming; five programmable dimming curves can be set in any silicon circuit or silicon circuit group in the whole system, and the curve can be adjusted with more than 100 setting points, which is suitable for high-precision lighting control; debugging can be directly processed by processor or processed by silicon cabinet structure reporter and monitoring software, which has the same industry State of the art and easy to use.
The silicon cabinet of SLD system is connected by Shownet network or silicon cabinet supervisor, which provides comprehensive information for all the strode 300 or 500 Series console, and the silicon cabinet provides system status, warning and load conditions; in addition, the console can record and replay the "SWC" preset. The console can also record the status of the silicon cabinet for users're inspection and system maintenance. SLD silicon cabinet uses large and simple facility management software, and can remotely monitor, set up and manage ParkNet silicon cabinet through a Shownet network. Up to 18000 The address of the DMX can be controlled through the optical fiber network and can be set by various control systems. Through this software, the settings of editing, playback, outfook and SWC can be established. The control circuit can be set for each silicon cabinet or system wide control system. The programmable functions of the control system are as follows: a digital input a / b pairing, B analog input, C preset silicon cabinet loop address code (ID), D silicon cabinet shape Status report (effective / ineffective), e record "Outlook" and "SWC" preset and preset fade in and fade out time, f start "SWC" preset, G set "SWC" backup preset (used for the case of DMX input failure), H set silicon output level (%), I set silicon maximum output voltage (24 v-240v per 1 VAC segment), J set silicon minimum level (0- 99%), K sets silicon curve, l sets silicon reaction time, M sets control logic, so as to realize huge lighting control system management.
Conclusion
Scientific and technological innovation promotes social development, and the process of digitalization and networking of TV industry accelerates, which brings about changes in technical system and technological process. On the one hand, the TV program production system will develop in depth to digitalization and functionalization, and on the other hand, it will promote the integration, mutual promotion and continuous progress of the previous relatively independent links. The SLD dimming silicon cabinet with excellent performance and outstanding network function of the company makes it possible to store digital signals and realize the sharing of lighting data, thus creating favorable conditions for the effective utilization of resources and the modern management of program production.
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