Wireless sensor application sensor type

2022-07-22
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Wireless sensor network is an emerging technology that integrates sensor technology, embedded computing technology, modern network and wireless communication technology, distributed information processing technology and other fields. This technology has a wide range of application scenarios

wireless sensor is one of the research hotspots in the current information field, which 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. Next, I will introduce the applications and types of wireless sensors

wireless sensor applications

1, military applications

in the military field, WSN is very suitable for harsh battlefield environment because of its dense and random distribution. WSN can be used to monitor the forces and equipment in the enemy area, monitor the battlefield conditions in real time, locate targets, and monitor nuclear or biochemical attacks

2. Auxiliary agricultural production

wsn is especially suitable for production and scientific research in the following aspects. For example, the monitoring of temperature, humidity and light in the greenhouse and soil, the analysis and measurement of the growth law of precious cash crops, and the breeding and production of high-quality grapes can bring great help to rural development and farmers' income increase. Using WSN to build an automatic monitoring system for agricultural environment, and using a set of network equipment to complete the data collection and environmental control of wind, light, water, electricity, heat and pesticides, can effectively improve the degree of agricultural intensive production and the scientificity of agricultural production and planting

3. Ecological monitoring and disaster warning

wsn can be widely used in ecological environment monitoring, biological population research, meteorological and geographical research, flood and fire monitoring. Environmental monitoring provides scientific decision-making basis for environmental protection and is the basis of ecological protection. Arranging WSN in field areas or areas unsuitable for manual monitoring can carry out long-term unattended continuous monitoring and provide real-time data for the protection and research of ecological environment

specific applications include: studying endangered populations by tracking the habitat and foraging habits of rare birds and other animals; Arrange sensor nodes in the areas along the river to monitor the water level and the pollution of water resources at any time; Arrange nodes in areas where natural disasters such as debris flow and landslide are prone to occur, so that disaster early warning can be issued in advance and corresponding disaster prevention measures can be taken in time; A large number of nodes can be arranged in the key protected forest areas to monitor the internal fire situation at any time. Once a fire is found, an alarm can be sent immediately, and the specific location and current size of the fire can be given; Nodes can be arranged in areas with disasters such as earthquakes and floods, remote mountainous areas or remote field areas for temporary emergency communication

4. Infrastructure condition monitoring system

wsn technology plays a positive role in the safe construction of large projects and the monitoring of building safety. By arranging sensor nodes, we can timely and accurately observe the conditions of buildings, bridges and other buildings, find dangerous situations in time, and carry out maintenance in time to avoid serious consequences

5. Applications in the industrial field

in terms of industrial safety, sensor network technology can be used in dangerous working environments, such as arranging sensor nodes in coal mines, oil drilling, nuclear power plants and assembly lines, which can monitor the safety status of the working environment at any time and ensure the safety of workers. In addition, sensor nodes can also replace some workers to perform tasks in dangerous environments, which not only reduces the degree of danger, but also improves the accuracy and speed of response to dangerous situations

6. Ensure safety and smoothness in intelligent transportation

intelligent transportation system (ITS) is a new transportation system developed on the basis of traditional transportation system. It comprehensively applies information, communication, control, computer technology and other modern communication technologies to the transportation field, and “ People — Car — Road — Environment ” Organically combined. Adding a wireless sensor network technology to the existing transportation facilities will fundamentally alleviate the problems of safety, smoothness, energy conservation and environmental protection that perplex modern transportation, and improve the efficiency of transportation. Therefore, the application of wireless sensor network technology in intelligent transportation system has become a research hotspot in recent years

7. Great achievements in the medical system

in recent years, wireless sensor networks have been widely used in the medical system and health care, for example, monitoring various physiological data of the human body, tracking and monitoring the actions of doctors and patients in hospitals, as well as drug management in hospitals. If special-purpose sensor nodes, such as heart rate and blood pressure monitoring equipment, are installed on inpatients, doctors can know the condition of the monitored patients at any time and can quickly rescue them in case of abnormal conditions

8. Promote more intelligent information home appliances

the gradual popularization of wireless sensor networks has promoted the rapid development of information home appliances and network technology. The main equipment of home networks has expanded from a single computer to a variety of home appliances. The intelligent home network control node based on wireless sensor networks provides a basic platform for the connection of internal and external networks and the connection of information home appliances and devices between internal networks

sensor type

1, vibration sensor

the maximum sampling rate of each node can be set to 4kHz, and each channel is equipped with anti aliasing low-pass filter. The collected data can be either transmitted to the computer in real time or stored in the 2m data memory built in the node, ensuring the accuracy of the collected data. The effective outdoor communication distance can reach 300m, and the node power consumption is only 30mA. Using the built-in rechargeable battery, it can be measured continuously for 18 hours. If you choose a node with a USB interface, you can not only charge the node through the USB interface, but also quickly download the data in the memory to the computer

2. The strain sensor

node has compact structure and small volume. It is composed of power module, acquisition and processing module and wireless transceiver module, and is packaged in PPS plastic shell. Each channel of the node has an independent high-precision 120-1000ω The bridge resistance and amplification conditioning circuit can be easily switched by the software automatically, and the measurement methods of 1/4 bridge, half bridge and full bridge can be selected. It is compatible with various types of bridge sensors, such as strain, load, torque, displacement, acceleration, pressure, temperature, etc. The node supports 2-wire and 3-wire input modes at the same time, and the bridge is automatically balanced, which can also be stored in the 2m data memory built in the node. The effective outdoor communication distance can reach 300 m. It can be measured continuously for more than ten hours

3. The torque sensor

node has compact structure and small volume, and is packaged in a resin shell. Each channel of the node has built-in high-precision 120-1000ω Bridge resistance and amplification conditioning circuit. Automatic balancing of bridge and road. The air transmission rate of nodes can reach 250K BPs, the effective real-time data transmission rate can reach 4K SPS, and the effective indoor communication distance can reach 100 meters. The node is designed with special power management software and hardware. Under the condition of real-time uninterrupted transmission, the power consumption of the node is only 25mA. Using ordinary 9V battery, it can be measured continuously for dozens of hours. For long-term monitoring applications, the torque value is sent once every 5 minutes, and the battery does not need to be replaced for several years, which greatly improves the maintainability of the system

editor's summary: that's all for wireless sensor applications and sensor types. I hope it will be helpful to you. If you want to know more, you can pay attention to information

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