Table of Content
- Voice Controlled Home Automation Based on MediaTek LinkIt
- Zigbee Based Home Appliances Controlling Through Spoken Commands Using Handheld Devices
- A wireless power outlet system for smart homes
- A ZigBee Based Mesh Network for Home Control System
- Zigbee Technology and its Application in Wireless Home Automation Systems: A Survey
Secondly, it introduces the construction of the software development environment. Then, a radio frequency communication protocol was designed to make multinode control more convenient. Finally, it focuses on the software design of the main control center, control node, and intelligent terminal. In this paper, the research and design of the smart home embedded control system based on voice perception conducts an experimental test. A corpus was constructed, and experimental tests were carried out on each module.
GSM, Internet, and speech recognition techniques are successfully merged in a single wireless home automation system that offers a complete, low cost, powerful and user friendly way of real-time monitoring and remote control of a house. Radio frequency is a communication method for wireless communication between the main control center and each control node. As the nRF905 radio frequency module itself does not have networking capabilities, a communication protocol is designed to make the system have networking capabilities. As the server, the main control center is the main part of the smart home control system and the hub that connects smart terminals and control nodes. On the one hand, the main control center is responsible for parsing the instructions sent from the smart terminal, and the instructions can be parsed into control commands or monitoring commands.
Voice Controlled Home Automation Based on MediaTek LinkIt
After the system is started, the audio codec chip collects the voices of the testers for 5 s from 100 members, calculates the likelihood, and obtains the corresponding correct rate. In the actual environment, environmental conditions are artificially changed. In order to achieve better and more obvious effect, this paper sets the environmental parameter threshold as shown in Figure 5. Except for the system wake-up command, the experimental tests are all tested. To use the hidden Markov model in speech recognition, the first step is to determine the topological form of the hidden Markov model. The topological form of the hidden Markov model is distinguished according to the appearance of the Markov chain, which can be divided into each state ergodic type, left-right type with spanning and left-right type without spanning.
The power supply is designed with a rechargeable lithium battery, so a charging module must be added to the circuit to charge the battery. The system charging module uses the TP4056 chip, which includes battery temperature detection, undervoltage lockout, automatic charging, soft start, and dual battery status features such as output LED pins. The overall design of a wireless home automation system which has been built and implemented and uses low-power RF ZigBee wireless communication modules which are relatively cheap is detailed.
Zigbee Based Home Appliances Controlling Through Spoken Commands Using Handheld Devices
If it is a control command, the main control center will send the command to the control node for processing; if it is a monitoring command, the main control center will process the stored video-play, close or forward. On the other hand, the main control center receives the response information fed back by the control node and feeds the response information back to the smart terminal. The main control center software design flow chart is shown in Figure 3. Compared with the vigorous development of foreign speech recognition technology, the domestic start is relatively late. In the 1980s, due to the popularization of computer technology in China, the conditions for research on voice technology were available, and many scientific research units began to study voice recognition technology . With the development of the “863” project, speech recognition has been listed as a special research topic and has developed rapidly.
If the threshold is set too high, the effect of improving system security can be achieved, but it will cause a drop in the correct recognition rate. Therefore, the threshold setting should be determined based on actual measurement. The reason why the log likelihood result is negative is that the probability is a number less than 1. In order to reduce the error, we take the logarithm of the probability to a negative value, and then add it. In this way, it can be judged by the maximum log likelihood that it corresponds to that model, and then, it can be judged whether it is a family member by the threshold of the log likelihood of the model.
A wireless power outlet system for smart homes
Smart home is an emerging industry, and its market was regarded as a sweet and delicious cake from the beginning. Major companies have joined the research and development of smart homes, which has also promoted the rapid and vigorous development of smart homes abroad . Some large multinational companies, such as Intel, Motorola, Cisco, and Panasonic, even when smart homes were just proposed and just started to develop, quickly entered this smart home market battle and created their own R&D units related to smart home appliances.
The client and the server communicate through the TCP protocol, and the server and the controller communicate wirelessly through the radio frequency protocol. The test results show that family members can correctly control the system and achieve the goal of correct control of home facilities through voice commands combined with family environment information. However, the star-shaped network topology currently adopted by the system is simple and easy to use, but when there are a large number of sensors, the system needs a large number of information collection nodes, which will greatly increase the system cost. At this time, the star structure is not as cost-effective as the tree and mesh structure. Therefore, at this point, the system needs to be improved, depending on the specific situation.
Yong, “Research on security evaluation indicator system of smart home,” American Journal of Networks and Communications, vol. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. This work possesses novelty for first time integrating ZigBee, DSP, and Web Services technologies to develop PMS, and can be a useful reference for future developments of PMS. From the results, it is shown that the control system is well performance while it is developed just low-cost devices. The system discussed in this paper can be used to control lighting and as well as makes of sensors to detect various changes in the home environment such as the dust, noise, temperature and pressure.
The system is highly integrated, and the remote control can be controlled by “one-to-many” and “many-to-one” by programming related programs. This article introduces the software design part of the smart home control system based on speech recognition technology. First, according to the function of the system, the overall design of the system software and the wireless communication method among the client, server, and controller are introduced.
The world software giant Bill Gates spent more than 40 million US dollars to build a modern digital mansion in Washington State, USA, which not only makes countless people envy but also expands their imagination. Smart homes have gradually received more attention from all walks of life and have become a comfortable and modern living environment . However, many professional organizations cannot accurately define what a smart home should be. Many people equate a smart home with the Internet access function of various electrical devices, which is obviously not comprehensive. Some developers even use the concept of smart home to promote that users can fully digitize their lives just through the networking of home appliances . In fact, both modern and future smart homes are far more than these.
With the rapid development of economy, science, and technology, people have higher and higher requirements for the quality of home life, and smart home systems are required to have higher convenience and comfort. The continuous development of embedded technology, short-range wireless communication technology, and microcontroller technology provides a new development direction for the research and development of smart home systems. The system adopts ZigBee wireless communication to form a comprehensive management system for household electrical appliances, electronic and electrical equipment, etc., for household electrical control, intelligent security, and environmental monitoring.
After the voice command is issued, the system can correctly execute the predetermined operation after judging according to the environmental information, which proves the correctness of the system. In foreign countries, the research level of smart homes in western developed countries is the highest . And no matter from the concept of smart home to the formulation of industry standards and the actual state of development, foreign countries are far ahead of China.
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