In view of the switch control of traditional LED ceiling lamps, which relies on wall panel switches, which is not intelligent and unhumanized, this paper proposes a lighting control system for high-end LED ceiling lamps based on cloud computing. The system is closely integrated with network communication technology, using hot mobile devices such as mobile phones, Ipad as the control terminal, not only can realize remote switch control of indoor led ceiling lamps, but also can realize color temperature, brightness infinite adjustment, turn off timing, etc. Features. At the same time, combined with the cloud computing platform, real-time monitoring of the situation at home can be realized. In any place with network coverage, whether it is wired network, WIFI network, GPRS network or 3G network, the system can be controlled by the mobile phone login application software.
Led light source is known as the most promising green lighting source in the 21st century because of its low energy consumption, high color rendering, long life, non-toxicity, and recyclability. The indoor ceiling lamp adopts led lamp bead , which can achieve a good color rendering index, and can realize the color temperature adjustment of the lamp by utilizing the color temperature characteristic of the LED to meet the visual requirements of the person.
The widespread use of the Internet and the rapid development of communication technologies have brought digital and informational changes to society, and various household appliances have become more intelligent. The popularization of smart phones provides people with a smart terminal that can access the Internet anytime and anywhere. Using mobile phones, IPAD, etc. to control the lamps eliminates the trouble of finding a remote control, which is convenient and quick. At the same time, when the home monitoring function is enabled, the real-time monitoring video can be saved on the cloud storage platform with large storage capacity, and the user who is on a business trip can log in to the cloud platform through the mobile phone to know the situation at home and not occupy the memory of the mobile phone. The design system uses the Internet and WIFI wireless network communication technology and the cloud computing platform to design an intelligent lighting control technology, which realizes the remote switch, brightness and color temperature adjustment of the LED lamp through the mobile terminal, and realizes the situation at home by using the cloud service platform. real time monitoring.
1. Overall structural design
The lighting control system of high-end LED ceiling lamps based on cloud computing is divided into three modules, namely mobile control terminal, cloud service platform and control center. The overall structure is shown in Figure 1. The control center is the control hub of the whole system. It establishes a connection between the control end and the control object, and coordinates the coordination of each part. The LED ceiling lamp has a built-in WIFI module. The mobile phone can be directly connected to the wireless LAN it sends out to control it. Of course, the luminaire and the mobile phone can be connected to the Internet at the same time to remotely control the luminaire.
After the introduction of the cloud computing platform, we use remote monitoring technology to facilitate people on business trips to understand the opening of the lamps in the home through the webcam, to facilitate the corresponding operation of the lamps in time, to realize the opening of the lamps without entering the house and to solve the trouble of forgetting to turn off the lights when going out. . The combination of lighting control technology and cloud computing enables cloud servers to connect to thousands of luminaire subsystems for coordinated control.
2, hardware design
2.1 Control Center
The control center is the core module of the entire lighting control system, as shown in Figure 2. It establishes a connection between the control end and the control object, coordinating the coordination of the various parts. The main tasks of the control center include communication with the mobile terminal, information exchange with the cloud server, and adjustment control of the luminaire. The most important part is the WIFI communication part. Its working principle is to receive the instructions sent by the mobile phone, convert the received network signal into serial port data, input to the single-chip microcomputer, decode and decode through the lamp control module, and the two-way PWM signal. Adjust to output different duty cycles, change the output current of the dimming power supply, and adjust the brightness and color temperature of the lamp.
Figure 2 Control Center Structure
The design realizes the conversion between the network signal and the serial port signal through the USR-WIFI232-SUART interface WIFI data transmission module, thereby realizing the control of the luminaire by the mobile control terminal such as the mobile phone through the wireless network. This system uses Taiwan's Hongjing's STC12C5620AD microcontroller as the main control chip. As shown in Figure 3, it is the interface circuit design of USR-WIFI232-S module and single chip STC12C5620AD. The USR-WIFI232-S module is connected to the STC12C5620AD through the serial port to complete data interaction.
The USR-WIFI232-S module has three working modes, including AP mode, STA mode and STA+AP mode.
This design system uses the STA+AP mode. As shown in FIG. 4, in the STA+AP mode, the user equipment can be monitored by using a handheld device such as a mobile phone without changing its original network setting.
The networking application can collect data on the user equipment and send it to the server for processing and storage, and the server can also send commands to control the user equipment. The user can use the mobile phone or PC to control the device through the local area network, and can communicate with the server remotely through the mobile phone or PC to realize remote data acquisition or remote device control.
2.2 Cloud Service Platform Architecture
The cloud service platform architecture includes a cloud computing platform layer, a service layer, and a mobile application layer. As shown in Figure 5.
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