Wireless sensor network technology is valued

Wireless sensor network is considered to be the second largest network after the Internet in the world. With the increasing popularity of wireless sensor networks, more and more fields will regard it as one of the basic technologies for future development.

Wireless sensor networks are one of the research hotspots in the current information field and can be used for signal acquisition, processing and transmission in special environments. Wireless sensor network is a new information acquisition and processing technology, which has been more and more widely used in real life.

Sensor nodes can continuously perform data acquisition, event detection, event flags, position monitoring, and node control. These characteristics and wireless connection of the sensor nodes make wireless sensor networks have a very broad application prospect. They can be widely used in environmental monitoring and forecasting, health care, smart homes, building condition monitoring, complex machinery monitoring, urban transportation, space exploration, large-scale Workshop and warehouse management, as well as security monitoring at airports and large industrial parks. With the in-depth research and widespread application of wireless sensor networks, wireless sensor networks have gradually penetrated into all areas of human life and have received the attention of people in the industry.

Safe and Smooth Traffic in Intelligent Transportation

The Intelligent Transportation System (ITS) is a new type of transportation system developed on the basis of traditional transportation systems. It integrates information, communication, control and computer technologies, and other modern communication technologies into the transportation sector, and it will “people-vehicle-roads”. - The environment is organically combined. Adding a wireless sensor network technology to existing transportation facilities will fundamentally alleviate the problems that plagued modern transportation such as safety, patency, energy saving, and environmental protection, and at the same time improve the efficiency of transportation work. Therefore, applying wireless sensor network technology to intelligent transportation systems has become a research hotspot in recent years. The intelligent transportation system mainly includes the collection of traffic information, the transmission of traffic information, traffic control and guidance. Wireless sensor network can provide an effective means for intelligent traffic system information collection and transmission, used to monitor the traffic flow, speed and other information in all directions of the road and intersection. It is mainly composed of information acquisition input, strategy control, output execution, data transmission and communication between subsystems, and other subsystems. The information acquisition subsystem mainly collects vehicle and road surface information through sensors, then the strategy control subsystem according to the set target, and uses the calculation method to calculate the best solution, and outputs the control signal to the executive subsystem to guide and control the vehicle. Pass to achieve the preset goal. Wireless sensor networks can also be used in intelligent traffic in areas such as traffic information dissemination, electronic toll collection, vehicle speed measurement, parking management, integrated information service platforms, smart transit and rail transit, traffic guidance systems, and integrated information platforms.

There is a great deal in the medical system

In recent years, wireless sensor networks have had many applications in medical systems and health care, such as monitoring various physiological data of the human body, tracking and monitoring the actions of doctors and patients, and drug management. If special purpose sensor nodes, such as heart rate and blood pressure monitoring devices, are installed on the inpatient, the doctor can keep track of the patient's condition at any time and he can quickly rescue him if he finds an abnormal condition. A study at the University of Rochester shows that these computers can even be used for medical research. Scientists used wireless sensors to create a "smart medical home," a five-room apartment house where human research projects were used to test concepts and prototype products. The "Smart Home" uses dust to measure important features of the occupants (blood pressure, pulse, and breathing), sleeping position, and 24-hour activity. The data collected will be used to conduct future medical research. By embedding network sensors in devices such as shoes, furniture, and home appliances, it can help the elderly, seriously ill patients, and the family life of people with disabilities. The use of sensor networks can efficiently deliver the necessary information to facilitate care, and it can reduce the burden on nursing staff and improve the quality of care. Using the sensor network to collect human physiological data for a long period of time can speed up the process of developing new drugs, and the micro sensors installed on the monitored objects will not bring too much inconvenience to people's normal life. In addition, in many aspects such as drug management, it also has novel and unique applications.

Promote smarter information appliances

The gradual popularization of wireless sensor networks has promoted the rapid development of information home appliances and network technologies. The main devices of home networks have been expanded from a single machine to various home appliances. The intelligent home network control nodes based on wireless sensor networks are internal and external networks. The connection and connection of information appliances and devices within the internal network provides a basic platform.

Embedding sensor nodes in home appliances and connecting them to the Internet through wireless networks will provide people with a more comfortable, convenient and more humane smart home environment. Remote monitoring system can be used to remotely control home appliances, and home security can be monitored at any time through image sensing devices. The use of sensor networks can create smart kindergartens, monitor children's early education environment, and track children's activity trajectories.

The wireless sensor network uses the existing Internet, mobile communication network and telephone network to inform residents about the indoor environment parameters, home appliance operation status, etc., so that residents can understand the internal conditions of the home in a timely manner and remotely monitor and control the home appliances to achieve internal home and External information transmission. The wireless sensor network enables tenants to monitor home water meters, electricity meters, gas meters, electric water heaters, air conditioners, rice cookers, etc., and security systems, gas leak alarm systems, and outsider intrusion warning systems. The home appliance can be remotely controlled through a browser setting command. A wireless sensor network consists of multiple wireless sensor nodes with the same or different functions. One device is monitored to form a wireless sensor network. The wireless sensor network is connected to the Internet through a gateway. A star-structured hybrid star wireless sensor is used. Network structure system model. The sensor node is responsible for data collection and data transfer node data acquisition in the network. The module collects indoor environment data, such as temperature, humidity, etc., and the communication routing protocol directly or indirectly transmits the data to a remote gateway.

At present, the research of wireless sensor network nodes at home and abroad mainly focuses on low-power hardware platform design, topology control, network protocol, and positioning technology. Taking a sensor that detects light intensity as an example, a wireless sensor network is implemented, and the light is turned off or on according to the light intensity detected by the sensor. In a wireless sensor network, an ordinary node sends the light intensity data it has collected to the network coordinator. The network coordinator sends the data frame containing the control variable to the node with the indicator, and also transmits the light intensity data through the serial port. Give the computer. Through the background software installed on the computer, you can see the change of the light intensity signal. By covering the light intensity sensor, the acquired light intensity data can be changed. When the light intensity is relatively low, the curve decreases, whereas the curve rises. This sensor network integrates embedded technology, sensor technology, and short-range wireless communication technology and has a wide range of applications. The system does not require changes to the site structure, does not require any previous fixed network support, can be quickly deployed, easy to adjust, and has good maintainability and scalability.