The intelligent lighting control system is to provide high controllability of various buildings and further enhance the building to green energy and level. It is the core product of energy and digital technology exchange. The scale of the system is very flexible, from small to ten loops of hostless small-scale applications can be used in thousands of loop network systems. This is because the lighting in modern architecture and living rooms not only provides good visual conditions for people's work, study and life, but also uses the styling light color to create a certain indoor environment. Therefore, the intelligent lighting control system came into being With the implementation of the green lighting project plan, the intelligently regulated semiconductor scene lighting system has gradually developed. In particular, the practical and easy-to-use next-generation digital lighting control system can be used in various types of construction projects to create new solutions in the home or office and commercial or public spaces. To this end, this paper will discuss the intelligent lighting control system architecture and application modules and features, and focus on the realization of the 'smart' technology of the lighting control system, and control the intelligent lighting in the home, office and commercial buildings. The application in space is introduced.
Based on this, the intelligent lighting control system architecture was first discussed. Figure 1 is a schematic block diagram of a smart lighting control system. It is a high-tech control system that uses a D-bus bus (a pair of data communication 2C communication lines) to penetrate the whole building, high-tech digital switches installed in different positions, or various traditional switches with various shapes and styles. The user can control the control output device at other locations at any location. Control the atmosphere of the start or stop or dimming scene. Users can also control the mobile phone through the color touch screen on the wall; for various buildings, the system can also be integrated with various central monitoring systems.
1 Application of intelligent lighting control system solution and module application
It can be seen from the schematic block diagram of the intelligent lighting control system of Fig. 1 that the entire lighting control system organically connects the various components through the D-bus bus, and its application characteristics are as follows:
*Infrared control module should be used with infrared sensor. It is normally open or normally closed during the day and controlled by infrared light at night. Among them, it is a new type of infrared chain control. It is often used in walkway or toilet tea room. With power saving control, this function must be equipped with infrared control module. It can be set to one of the following two modes as needed: it is normally turned on. When the command is turned off, it will follow the infrared action delay; or it will be turned off when it is normally turned on. When the command is issued, it will follow the infrared action delay.
*Simple touch switch is a color touch screen operation. It is used with the communication converter and should be synchronized with the status of the live loop. The same system can be installed in multiple places. It should be noted that the mobile phone can also be a remote control. Going out, you can control the status of the light switch in your home through the screen of your mobile phone or remotely pre-open or indoor lighting before going home.
* Power equipment control This function needs to cooperate with the electromagnetic switch control module. Note that electromagnetic switches are mostly used in higher power motor equipment or air conditioners or high power light groups. The system not only controls the lighting, but also the air blower or the smoke exhaust, and the blower can be controlled together. The four-loop address power control electric module can control and monitor four sets of external electromagnetic switches, and is a code setting, including four sets of 10A electric modules, including 12 sets of state contact inputs, which are digital interfaces and 2-wire type. Communication.
*Time-course control With the web-based time-of-day controller on the bus, you can adjust the schedule or force switch by means of the Internet. Modify time and remote control by means of Internet access. The control method is based on groups, and is not controlled by individual loops, and up to 10 groups are controlled. The function of the web-based time-of-day controller is: the time schedule can be planned by webpage (in weekly); it can use two schedules per week for different time schedules; It can control the multi-zone circuit of the whole building, and can remotely monitor and adjust the settings and remotely control a certain group through the webpage; it can also operate independently without relying on the computer and the network.
* Remote control operation All facilities can be operated by holding a remote control in the living room or in the home theater. Including audio and video TV, audio, DVD, curtains, projectors and lighting and air conditioning, where lighting is the most important equipment in the space atmosphere, click [view], [rest], [party], [quiet], [ on the remote control] Enthusiasm, [warm], etc., create a sense of space that is completely different.
*With the traditional switch The traditional switch shape and material selection are diverse, which is convenient for the design of the decoration. The traditional switch is convenient for future maintenance and control; the mating circuit is similar to the traditional operation mode. In the vicinity of the light where the loop is located, a conventional switch can be used in combination with a four-circuit conventional switch addressable electrical template or a three-circuit transfer integrated switch interface set. The conventional switch can still be set to perform group control or scene.
* Dimming control This function needs to be used with the dimming application module. When the knob is manually adjusted, the luminaire follows the knob to dim. When there is a scene command, the scene command is used. The dimming application module outputs 0-10V high, with an additional dimming electronic ballast or thyristor. The dimming application module is used in conjunction with energy-saving applications or conference room and living room atmosphere; its address can be set to 1-64, there are 8 sets of scene settings, 4 sets of DCO~10V output connection dimming ballasts or Silicon control, working voltage is AC 18V/DC 24V, 4 groups of O-10vdc input terminals are connected to local control buttons, digital interface, 2-wire communication, dimming application module rated capacity is 300VAC/20A.
* Daylight saving control Energy-saving application: When the outdoor lighting is strong, the light circuit near the window or the roof can be automatically adjusted to be dark, and the outdoor light intensity can be adjusted according to the schedule. Should be used with a temperature control switch. The temperature control switch function can send special group open or group close command through the D-bus bus when the temperature exceeds a certain temperature, to control the power supply of the air conditioner, the most used for air conditioning energy management, it contains temperature sensor, control power For 8A/220VAC.
* Air conditioning temperature saving control is also used in conjunction with the temperature control switch. It starts at 27 °C or above, and the electricity is too low when the temperature is 23 °C. The normal working range is between 23 °C and 27 °C. Energy-saving application: When the outdoor temperature reaches above 27 °C, the air-conditioning power supply in the area is opened. When the outdoor temperature is lower than 24 °C, the air-conditioning power supply is suspended.
* The central control system integration control should be used in conjunction with the communication converter. The system provides a communication open protocol (MODbus) for the integration of various building automation systems, and can synchronously respond to the current state of each loop of the main system and accept system control commands. Its communication converter can provide RS485~RS232 conversion function, maximum 16-node LT addressing (64 loops), D-BUS gateway with RS485 or RS232 interface, communication speed is 9600 baud.
* Multiple operations The system allows multiple channels to be operated on specific circuits. On the digital switch or on the touch screen, the on/off status of the corresponding loop can be displayed synchronously, press once to turn it on, and press again to turn off.
*Scene Control Determine whether the specified loop is on or off, or reserve dimming to create a space atmosphere. Press once for the same group member, some for the off, and some will adjust the intensity.
*Group control operation Use the same opening and closing operation, for example, when going to work, press the work button to turn on all office and hall lighting, and when you get off work, press the button to switch.
The LT4500 has a high output of 0-10V and requires an additional dimming electronic ballast or thyristor. Each sub-loop is combined into a group by setting mode, and each loop of the same group is opened together.
In addition to the above application features and modules, the intelligent lighting control system is equipped with flat circular lighting monitoring software, dedicated timers, transformers and 16-way flexible lighting controllers.
So what I have to analyze is how to realize the 'wisdom' of the intelligent lighting control system in technology?
2 The realization of 'smart' technology of intelligent lighting control system
Today's DSP, 16-bit single-chip microcontrollers and other chips are effective choices to achieve the 'smart' technology core, but from a cost-effective point of view, its Spartan-4 FPGA chip is the wisdom of the 'technical core of the choice is to compare ideal. Why is this? Since a field programmable gate array (FPGA) is an embedded IC, a computational component can be used to configure the matrix and software design with hardware logic. Unlike fixed computing functions of traditional microprocessors and DSPs, FPGA devices rearrange internal structures to perform computational tasks. FPGAs are designed to be completely parallel, so many application subsystems can run independently and independently using dedicated hardware resources. In FPGA construction, the implementation of transforming software code into highly optimized hardware is called synthesis. The FPGA compiler can perform complex optimizations, path selection, and validation, as there are a variety of hardware implementations that can be met. The design takes the form of information flow. The main chip of the LED lighting control system uses Spartan-4 FPGA chip, which has abundant memory resources and hardware multiplier resources for real-time data operations. These logic resources provide sufficient hardware for complex scene lighting control and intelligent control strategies. Basically, while the FPGA performance is stable, there is almost no crash. Figure 2 shows the application block diagram of the Spartan-4 FPGA chip in the smart LED lighting system.
In Figure 2, the LCD panel provides interactive information display for the user. According to different design requirements, the control parameters can be input by using a key input or a touch screen. The profile data is stored in Flash and can be queried and modified by the desktop or notebook software via the USB-RS 232 interface to facilitate online upgrade of system functions. RAM memory is selected according to actual needs
Select SRAM or SDRAM, which is mainly used for temporary data storage for complex operations, or as external memory necessary for implementing embedded processor NIOSII in FPGA.
* The I/O expansion in the control system is mainly used to implement the infrared remote control function and the wired remote control panel function. When the room is large and large, it is necessary to expand some control panels to facilitate the use; in the case of higher requirements, you can also use the infrared remote control method to distribute the infrared receiving probe to all the ranges to be controlled. Convenient scene lighting control.
With the rich logic resources of FPGA, the complexity of peripheral circuit design can be reduced, and digital signal processing can improve reliability and enhance intelligence. In the control box, you can integrate parameter controls such as color temperature, brightness, flicker, glare mode, children's room and mood, and independently set the conditions that trigger these scene lighting modes, using desktop or laptop software, not only can control all The lamp head can record the running state parameters of all the lamp caps. According to the attenuation rule of the LED parameters provided by the manufacturer, the driving parameters of the LEDs are automatically modified at an appropriate time, so that the attenuation of the lighting characteristics can be compensated.
3 Intelligent lighting control & construction and construction of architectural space
It should be said that the intelligent lighting control system is a core product that provides high controllability of various buildings and further enhances the integration of buildings to green energy and layers with energy conservation and digital technology. From the above analysis, it can be seen that its intelligently controlled semiconductor indoor scene lighting technology combines the semiconductor lighting technology with the design concept of modern intelligent lighting system, and constructs various intelligent lighting control & architectural space lighting solutions in the home and intelligent building. This will analyze the typical application scenario.
3.1 Diversification of home space lighting
Smart home or digital is undoubtedly the latest invention in the Internet era to change the life of home. Lighting control is no longer limited by the dead-and-match relationship of the past switch; smart light control changes your perception of the switch; Life is more emotional and more convenient. The intelligent lighting control system can be used to integrate traditional switches and digital switches. It can also be combined with various digital intercoms or integrated remote controls or color touch screens to make the home control more convenient.
For example, before going out, you can switch the lighting of the living room or room by tapping the button in the parking area. When you go home, you can turn on the illumination along the road at the touch of a button, as shown in Figure 2(a). Ingenious use of lighting characteristics in the design can make the same space show a completely different spatial tonality; make the home life more lively and vivid, as shown in Figure 2 (b); If you read, or enjoy the required situational lighting combination, you can turn off the various lightings in the living room and the walkway or the garden by pressing the button on the bed before going to sleep. You don’t have to get up and turn off the lights to destroy the sleepiness. Pre-planning the desired situation mode, touch the color touch screen to make guests or parties or enjoy the choice of different situation lighting such as festivals or reading books, as shown in Figure 2(c).
3.2 New requirements for public space
Enterprise office buildings, libraries, station airports, government buildings, stadiums, campuses, art galleries, training centers, parking lot exhibition centers, etc., cover a wide area, and their spatial characteristics are diversified, making lighting and air-conditioning facilities difficult to control, so it requires labor-saving Control management or time-course automatic control, and further cooperate with the demands of greening and energy-saving, and explore the corresponding energy-saving control functions.
For example, the administrator can control and control the public lighting and air-conditioning circuits in the whole area on the color touch screen next to the station. It does not need to run around, showing energy-saving and intelligent high-tech performance. The conference room or multi-function hall can be used to control the lighting of the scene mode according to the different needs of the meeting or the presentation or the briefing. The touch screen on the wall and the digital switch of the partition can be used to select the desired situation lighting combination; The loop is turned on, and after entering the peak period in the evening, it is matched with the infrared sensor, and the person lights up to light the person. In the reception counter or guard area or control room, the color touch screen can be used to centrally grasp the lighting status of each partition, and can also be remotely controlled; and each district can also be set with local switch nearby control. Each zone circuit needs to cooperate with each other. It is necessary to automatically start and stop the lights of each circuit according to the preset schedule. When there are special activities, you can also use the Internet to remotely control or modify the timetable, which greatly simplifies the control complexity. The mobile phone can also be a remote remote control. When you go out, you can control the status of the light switch in your home through the mobile phone screen or remotely pre-open or indoor lighting before going home.
3.3 Commercial space is comfortable and convenient
Restaurants, theaters, conference centers, shopping centers, shops, hospitals, hotels or motels, entertainment and leisure areas, and many other buildings with large floors and space require labor-saving management or automatic control of time and time. Perform situational lighting control. In the hotel room, you can change the different lighting situations in the room by tapping the button switch on the bedside. Such as warm, TV appreciation, good night, etc., as shown in Figure 3.
3.4 Office should have flexible interval lighting control
The office should be equipped with flexible interval lighting control to accommodate development and change offices. Why is this? For example, the rented office building needs to be changed due to the change of the renting unit; or the office building of the enterprise group is changed according to the organizational adjustment of the department; the system can be matched with the traditional switch of the new layout. The required combination of light control loops; without the need to change the distribution loop control of the fixtures in the ceiling; to solve the service troubles required by the property management unit for new customers, and to reduce the safety hazards caused by the change of the electrical circuit. It can be seen that the office should have flexible interval lighting control.
4 later words
The intelligent lighting control system realizes control through bus communication, and the system is equipped with a programmable control module. The advantage is that the control line is separated from the power line of the lamp, and the bus power supply control module and the switch controller are connected by a bus, so that the dispersed operating elements are organically combined, so that the lighting power line and the switch control circuit are not Then there is a traditional one-to-one correspondence, but an open control relationship.
Smart lighting control system For small-scale applications such as smart home ballrooms, users can set the contextual combination of switches and control loops without relying on special software or tools.
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