The hottest wireless sensor network WSN technology

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Wireless sensor network (WSN) technology scanning

WSN, a new technology that changes the world

traditional sensors are gradually realizing miniaturization, intelligence, informatization and networking, and are experiencing a development process from traditional sensors (dumb sensors), smart sensors (smart sensors) to embedded web sensors (Embedded Web sensors)

with the rapid development of micro electro mechanical system (MEMS), system on chip (SOC), wireless communication and Low-Power Embedded Technology, wireless sensor networks (WSN) technology came into being, and brought a revolution in information perception with its characteristics of low power consumption, low cost, distribution and self-organization. This has become a new hotspot in all fields

wireless sensor network is an interdisciplinary technology, which is composed of a large number of cheap micro sensor nodes deployed in the monitoring area and formed a multi hop self-organizing network through wireless communication. MEMS based micro sensing technology and wireless connection technology have given wireless sensor networks a broad application prospect. These potential application fields can be summarized as: military, aviation, counter-terrorism, explosion prevention, disaster relief, environment, medical treatment, health care, home furnishing, industry, commerce and other fields

WSN will be one of the four major technology industries in the world in the future, and will set off a new industrial wave

in 1999, BusinessWeek ranked it as one of the 21 most influential technologies in the 21st century; In 2003, MIT Technology Review listed it as one of the top ten new technologies to change the world in its report predicting the future development of technology. In the federal energy and development plan for the 21st century, the U.S. presidential Advisory Council on science and technology pointed out that the wide application of industrial wireless technology will increase industrial production efficiency by 10% and reduce emissions by 25%

wsn, development process and planning

as early as the 1970s, the prototype of the sensor network was formed by using point-to-point transmission of traditional sensors and connecting sensor controllers. We classify it as the first generation of sensor network

with the continuous development of related disciplines and the progress of making the experimental machine reach the qualified use state, the sensor network also has the comprehensive processing ability to obtain a variety of information signals, and through the connection with the sensor controller, a sensor network with information synthesis and processing ability is formed, which is the second generation of sensor network

since the end of last century, fieldbus technology has been applied to sensor networks. People use it to build intelligent sensor networks. A large number of multi-functional sensors are used and connected with wireless technology, and wireless sensor networks are gradually formed. Wireless sensor network is a new generation of sensor network, which has a very broad application prospect. Its development and application will have a far-reaching impact on all fields of human life and production. Developed countries, such as the United States, attach great importance to the development of wireless sensor networks

the U.S. Department of transportation proposed the national intelligent transportation system project plan in 1995, which is expected to be fully put into use by 2025. The plan attempts to effectively integrate advanced information technology, data communication technology, sensor technology, control technology and computer processing technology and apply them to the whole ground traffic management, so as to establish a large-scale, all-round, real-time and efficient integrated traffic and transportation management system. This new system will effectively use sensor networks for traffic management

the U.S. Army proposed the smart sensor network communication plan in 2001, which was approved for implementation during the fiscal year. Its basic idea is to deploy a large number of sensors on the battlefield to collect and transmit information, filter the relevant original data, and then transmit those important information to each data fusion center to integrate a large amount of information into a battlefield panorama. When the war participants need it, they can be distributed to them, so that their awareness of the battlefield situation is greatly improved

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in May 2002, Sandia National Laboratory of the United States and the Department of energy jointly studied a system that can detect biochemical weapon attacks targeting subways, stations and other places as soon as possible and take preventive countermeasures in time. It is an important part of the U.S. Department of energy's terrorist response program. The system integrates the chemical sensor concentration area for detecting toxic gases and the network technology according to the requirements of high starting point and high standard

the natural science foundation of the United States formulated the wireless sensor network research plan in 2003, and set up the sensor network research center at the University of California, Los Angeles, to carry out the research project of embedded intelligent sensors in conjunction with the surrounding University of California, Berkeley, the University of Southern California and so on

Intel released a new computing development plan based on micro sensor networks on October 24, 2002. According to the plan, Intel will be committed to the application of micro sensor networks in preventive medicine, environmental monitoring, forest fire fighting, as well as seabed plate investigation, planetary exploration and other fields

China has included sensor networks and information processing in the National Eleventh Five Year Plan and the national medium and long term scientific and technological development outline, and WSN has also been listed as a supporting project in the National 863 and 973 plans

it has broad prospects and a long way to go

research has found that the design objectives and standards of wireless sensor networks are significantly different from those of traditional wireless networks. The latter pays attention to providing users with high-quality services by optimizing routing and making full use of bandwidth in a mobile environment, while the former often works in a harsh environment inaccessible to people, unable to replace energy and reuse network nodes, so it is efficient, low-cost Self-organization is the first problem to be solved in wireless sensor networks

because WSN is currently in the stage of research and development and continuous improvement, its function is limited, its application scope can only be limited to data monitoring and acquisition, and it can not be used in control and security occasions. Large scale commercial applications still need time. At present, the application level can only be a supplement to wired. Of course, due to the needs of users and the development of technology, WSN has a bright future

according to the statistics of relevant experts, it will take about 5-10 years to overcome the difficulties of using batteries and high costs instead of cables when taking wireless. According to the experience of fieldbus, as long as there are no multiple standards, manufacturers and R & D departments do not deliberately hype, and adhere to the minimum investment to achieve the maximum production efficiency, so that WSN can achieve healthy and rapid development

at present, two major companies Emerson and Honeywell have launched WSN products. The former conforms to wireless h4.2.4 metal data decaying crack growth rate (da/dn) test fixture and accessories: it should meet the following sample test requirements: sample size B (thick) × W (width): 20 × 80mmart7.1 version standard; The latter adopts the isa100 standard. However, most of them are limited to transmitters with low power consumption of temperature, pressure, flow and material level. Chuanyi and Chongqing University of Posts and Telecommunications also produced wireless series transmitter and actuator prototypes, and WIA-PA was successfully used in Angang Cold Rolling Mill to measure bearing temperature

a survey of industrial enterprises shows that 40% of the surveyed enterprises plan to adopt wireless solutions to monitor the quality of machines. Research firm onworld predicts that by 2011, wireless sensor network (WSN) systems and services in the world market will soar to about $4.6 billion, an increase of $500million over the current level. Wireless sensor networks have just begun to develop. Domestic enterprises should seize business opportunities, increase investment, and promote the development of the entire industry

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