- Home >> Solution >> IOT >> smart home
Intelligent lighting system solution
In the early 1990s, with the development of computer technology and network technology, people have higher requirements for working and living environment and energy conservation. In some important places in buildings, simple switch control can no longer meet the demand, resulting in Intelligent lighting control method. Lighting control is no longer simply a property of building automation systems. The so-called intelligent lighting control is to automatically control the lighting equipment according to the function of a certain area, different time of day, indoor and outdoor brightness or the purpose of the area, and can realize the function of centralized and unified management and monitoring, combined with modern lighting technology and lighting art , scientifically manage lighting equipment, so that people not only meet the standard requirements in terms of lighting technical parameters, but also work and live in a comfortable, bright and artistic lighting environment.
The building automation system has realized the zone automatic control of the lighting, but it is limited to the switch control of the lighting circuit. The intelligent lighting control system is characterized by ambient dimming. It uses digital signals of weak currents to adjust the analog voltage output of strong currents, so that the lighting brightness can be continuously adjusted. Parameters are pre-stored to achieve preset scene dimming and various control functions mentioned above. In order to better understand the related technologies of intelligent lighting, we must first establish some concepts about intelligent lighting control and traditional lighting control.
1. Introduction to Intelligent Lighting System
The intelligent lighting control system is an integrated and inseparable control system including strong current and weak current control. The traditional lighting control system is a typical strong current control system. Its selection and configuration firstly depends on the number of lighting circuits, the capacity of the load, and the type of the load, which determines the main body of the system investment. Its installation and commissioning must also be closely integrated with the lighting power supply and load circuit. The lighting control in the building automation system is to send control signals through the computer, and the executive end uses a contactor to control the lighting circuit. It is a typical system in which weak current controls strong current. The positioning of intelligent lighting control in intelligent buildings is relatively flexible. When it appears as an independent lighting control system, it can not only realize independent lighting control, but also provide an interface with the building automation system to realize the control of lighting by the weak current system , when it appears as a part of the building automation system, the lighting system has greater independence and can work independently from the intelligent building system. Therefore, no matter whether the intelligent lighting control system is classified as "strong electricity" or "weak electricity", we must pay attention to its relationship with the parties of strong and weak electricity objectively.
2.The application field of intelligent lighting system
The combination of intelligent lighting and general conventional lighting, the combination of intelligent lighting and building automation system. If all places in a building are included in the intelligent lighting control system, it is impossible and unrealistic to consider many aspects such as cost and practicality. Generally speaking, large places such as hotel lobbies, exhibition halls, gymnasiums, lecture halls and multi-function halls, medium-sized places such as banquet halls, video conference rooms, multimedia communication halls and command centers, VIP reception rooms, small meeting rooms, leadership offices And other small places, as well as landscape lighting places, etc., are the first choice for incorporating intelligent lighting control systems.
Smart lighting should highlight features that reduce power consumption. In addition to the smart lighting places mentioned above, from the perspective of reducing lighting power consumption, intelligent lighting control should be adopted for road lighting, public places, etc. to reduce power consumption.
3. Functional characteristics of intelligent lighting system
(1) Centralized control and multi-point operation functions. Any terminal can control lamps at different locations, or the same lamp can be controlled at different terminals. Using various ways to manage the lighting control system, users can use the most convenient method to control the equipment in their own room at any time and any place.
(2) Soft-start and soft-off functions. The resistance of the filament of an incandescent lamp is much lower when it is cold than when it is hot. According to calculations, the starting current of the filament can reach more than 14 times the working current. Just turn on the light with a switch, and a very large current will pass through the filament, causing an impact. This is why many incandescent lamps are easy to burn out at the moment of turning on the light.
By slowly turning the light up to a set level, it is called soft start, and by slowly turning the light off, it is called soft turn off. When the light is turned on, the light gradually becomes brighter from dark; when the light is turned off, the light gradually becomes darker from bright to avoid sudden changes in brightness that irritate the human eye, provide a buffer for the human eye, protect the eye, and avoid sudden changes in high current and high temperature. impact, protect the bulb and prolong the service life of the lamp.
(3) Can successfully suppress the surge voltage of the power grid. It has the functions of voltage limitation and choke current filtering to avoid damage to the light source caused by overvoltage and undervoltage. Combined with soft-start and soft-off of lighting fixtures, the life of the bulb can be extended. Reducing the brightness of the bulb can also extend the life of the bulb. Reduce the brightness by 10%, and the life of the bulb can be extended by 1 time, and reduce it by 50%, and it can be extended to 20 times.
Prolonging the life of the light source can not only save a lot of money, but also greatly reduce the workload of replacing the lamp tube, which can reduce the operating cost of the lighting system, and the management and maintenance are also simple. Whether it is a thermal radiation light source or a gas discharge light source, the fluctuation of the grid voltage is a major cause of damage to the light source. Therefore, effectively suppressing the fluctuation of the grid voltage can prolong the life of the light source.
(4) Lighting dimming adjustment function. Whether it is meeting guests, watching TV, listening to music or thinking with family members or alone, adjusting the brightness of different lights can create a comfortable, quiet, harmonious and warm atmosphere. The local switch can be used to adjust the brightness and brightness of the lights. For dimming, you can also use the centralized controller or remote control. You only need to press the button or enter the function setting to adjust the brightness of the light to achieve the desired lighting effect.
(5) Full open full close and memory function. The lights of the entire lighting system can realize the functions of one-key full-on and one-key full-off. When falling asleep or before leaving home, press the full off button, and all lighting equipment will be turned off.
(6) Timing control function. Through the schedule management module, the timing switch of the light is realized. For example, office buildings can implement time lighting control programs according to different time periods such as before and after work, rest, and cleaning, and manage the lights of offices, aisles, and corridors in a unified manner, which not only saves energy, but also facilitates management. For example, in the living room, after 23:00 can be set according to the time, the scene lighting will automatically switch to the scene lighting before going to bed. Before going to bed, you can also check whether the lights in each room are off from the centralized display.
(7) Scene setting. For fixed-mode scenes, there is no need to turn on and off the lights and dim them one by one. You can press a key to control a group of lights with only one programming. This is the scene setting function. Only one touch operation can realize the conversion of multi-channel lighting scenes, and can also get the desired combination of lighting and electrical appliances. With the help of various "pre-set" control methods and control components, the intelligent lighting control system can accurately set and reasonably manage the illuminance of different environments at different times to achieve energy saving. This method of automatically adjusting the illuminance makes full use of the outdoor natural light. Only when necessary, the light is turned on or turned on to the required brightness, and the minimum energy is used to ensure the required illuminance level. The power saving effect is very obvious. Generally, it can be Up to 30% or more.
(8) Local switch. You can directly control the local lighting according to your usual habits. According to the demand, the switch can set the required control objects arbitrarily, for example, the button in the hall can be used to turn off all the lights, which is energy-saving, safe and very convenient.
(9) Infrared and wireless remote control. In any room, use the infrared handheld remote control to control the switch status and dimming status of all networked lamps (whether the lamps are in the room or not). You don’t need to turn on the lights after entering the room. to turn on the lights.
(10) Remote public data network control. Realize remote control of lights or scenes through any ordinary phone or mobile phone. This function can simulate the lighting conditions when the owner is not at home to confuse would-be burglars.
(11) The lighting system also has the function of self-locking when power failure occurs. When there is a power outage at home, all lights will remain off when the power comes in. The intelligent lighting system can also be linked with the security system. When an alarm occurs, the lights set on the balcony of the home will flash and alarm.
4. System composition of intelligent lighting
The intelligent lighting control system is composed of control objects and controllers through the network. The whole system consists of three parts: on-site control unit, on-site detection unit, signal transmission and system management unit. The structure diagram of the intelligent lighting system is shown in Figure 1.
1. On-site control unit of intelligent lighting system
On-site control units include smart switches/relays, dimmers, dimmable electronic ballasts, smart lamps, control panels, clock managers and other control devices. The control device should have protection functions such as soft start of light source, automatic delay start in hot state, soft shutdown, power supply voltage surge limit, detection function of state parameter detection and emergency lighting function when the power supply is abnormal.
(1) Smart relay: The smart relay is used to directly control the opening and closing of the power supply line of the lighting equipment. It is an executive device. The wiring diagram of the 6-way smart switch module is shown in Figure 2. The intelligent host or intelligent control panel is received through the RS-485 network, and after the control program analysis, decoding, and calculation of the microcontroller, the various relay coils are driven to achieve the purpose of controlling the pull-in and disconnection of the relay. It has functions such as local manual opening, output status display, and scene mode storage.
(2) Dimming controller: Dimming module is the main equipment in the control system. Its main functions are power distribution, stepless continuous dimming and switch control for lamps with different functions. It can adapt to changes in power supply voltage and frequency, suppress electromagnetic interference, improve the output waveform of power supply voltage, prevent high starting current and thermal shock, protect lamps and prolong lamp life through soft start characteristics and soft shutdown technology. Dimming control is further divided into: leading edge phase control dimming mode (silicon controlled dimming controller), trailing edge dimming control mode (MOS tube dimmer), sine wave voltage conversion dimmer and dimmable electronic ballast The adjustable electronic ballast adopts frequency modulation or pulse width modulation (PWM) to adjust the input power of the fluorescent lamp tube, so as to achieve the purpose of changing the output luminous flux of the fluorescent lamp. At present, the dimmable electronic ballasts for fluorescent lamps are relatively mature, and the dimmable electronic ballasts for metal halide lamps are still under development. At present, the dimmable electronic ballasts for ceramic metal halide lamps have been launched, and the power is below 400 W. The wiring diagram of the six-way fluorescent lamp dimming module is shown in Figure 3.
(3) Control panel: The control panel in intelligent lighting is equivalent to the lighting switch in the traditional lighting system, and it is installed in a place where it is easy to operate. By operating the buttons on the control panel, people can start the combination of lighting control loops in the lighting system or call a certain lighting scene preset and memorized in the dimming module and switch module, so that the system can be composed of different lighting loops, different The lighting effect made by the combination of light and dark.
(4) Clock Manager: It is used for timing setting of complex lighting events and tasks within a week or a year, and can implement timing control for places with periodic control characteristics such as living room, dining room, bedroom, bathroom, corridor, and landscape lighting. One clock manager can manage multiple areas, and each area can have multiple loops and multiple scenes. In addition, there is an LCD touch screen.
2. On-site detection unit of intelligent lighting system
It mainly includes intelligent sensors, voltage and current detection units, etc. It is an automatic information sensing element for intelligent lighting management in the system, and has three functions: motion detection, illuminance dynamic detection, and receiving infrared remote control. Different control strategies use different sensors.
(1) Photoelectric sensor: Photoelectric cells are used to convert light signals into electrical signals, but the output signal is generally small, and a conditioning circuit must be added to detect the illuminance or brightness of the environment, and to detect the illuminance or brightness of the environment according to the preset illuminance (brightness) value. Control the on/off or dimming of lights.
(2) Static and dynamic sensors: ①Passive infrared sensor, which can detect changes in heat (infrared) emitted by moving personnel; ②Ultrasonic sensor, which can detect frequency changes caused by the Doppler effect caused by the reflection of moving personnel; ③Passive A sensor combining infrared and ultrasonic waves. Since the passive infrared sensor has a detection dead zone, the ultrasonic sensor is very sensitive and susceptible to interference. The sensor combined with the source infrared and ultrasonic is a dual technology sensor combining the two, which achieves complementary functions and overcomes the shortcomings of the two sensors. Fulfill unforeseen use requirements.
3. Information transmission system of intelligent lighting system
Intelligent lighting control system and industrial automatic control system are basically the same in terms of system structure, and can be roughly divided into monitoring layer and field layer. Each layer exchanges information through the network to realize various lighting controls. Unlike industrial control systems that use a large number of standard fieldbus protocols, smart lighting pays more attention to the functionality and specialization of lighting products, and the products of various manufacturers use more independent bus technology and communication protocols.
5. Summary of Intelligent Lighting System Scheme
The intelligent lighting control system is a network system composed of central controller, main communication trunk line, branch, information interface and control terminal to control and sample signals in each lighting area. The control terminal of intelligent lighting is composed of various dimming modules, control panels, illuminance dynamic detectors, and dynamic and static detectors. Different specific controls are implemented for each area. The main controller and the terminal are connected through information interfaces. Realize the transmission of control information. The intelligent lighting control system realizes the centralized or decentralized control of the lighting system and realizes the rational use of lamps. It has practical significance for saving electricity, improving lighting quality, prolonging the life of lamps, and reducing the use of wires.
The above are the details of the intelligent lighting system solution introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for smart lighting controllers, you can trust us. We have rich experience in customized development of electronic products, and can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, household appliances scheme design, beauty equipment development, Internet of Things application development, smart home scheme design, TWS scheme development, Bluetooth audio development, children's toy scheme development, and electronic education product development.
- TOP