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From water, soil and climate monitoring to structural integrity monitoring of bridges and civil facilities, the advent of wireless measurement systems has made it possible to reduce installation and system costs, increase flexibility, and simplify system deployment. Wireless measurements can also solve previously used wired The solution is difficult to solve or even impossible to complete.
Introduction to wireless measurement
A complete wireless measurement network consists of three parts: the sensor part (WSN), the data processing part, and the data application part.
The sensor part is WSN - wireless sensor, which can be selected according to the needs of the field; and the data application part is actually the software system, which can be classified according to the needs of the application; the core part is the data processing unit, which can be selected according to the application needs. MCU or ARM system.
The support system of the wireless measurement system is also very important. For the WSN part, it is definitely powered by the battery. For the data application part, only one computer with Internet access is needed, and the data processing part can adopt different power supply systems according to actual needs.
The biggest advantage of the wireless measurement system is that the three parts are not hard-wired with each other. In other words, there is no physical relationship between them except for data exchange, thus effectively avoiding the complicated interference and resource allocation between each other. I think this It is the key to the development of wireless measurement technology.
Environmental monitoring
Environmental monitoring mainly includes checking the integrity of soil, water and air, and adjusting the temperature and humidity of the indoor storage environment. Outdoor environmental monitoring is important for industries such as agriculture, utilities, and meteorology. Indoor monitoring applications include home or building automation as well as retail or medical. Environmental monitoring also includes hazardous gas detection, which is important for industrial facilities or mining applications. Wireless technology extends these applications by allowing you to measure outdoors or over a larger geographic area.
The Embedded Network Sensing Center (CENS) is leading the project for data collection in tropical rainforest environments. They don't use cables, which not only reduces costs, but also simplifies installation. Using NI technology, CENS scientists do not need to use power cables, traction cables, or wiring infrastructure and measurement systems deep in the rainforest; they install NI wireless sensor nodes, batteries, solar panels, and mobile modems over the Internet. Data collection. They use Google Maps to locate the sensor nodes and record the deployment location.
Energy monitoring
In today's world, the energy crisis is getting worse. The monitoring of resource production and utilization processes is of paramount importance in the global market. In order to reduce the impact on the environment and make more rational use of natural resources, we first need to accurately collect data, and then make decisions and improvements based on the analysis of these data. Wireless technology is well suited for these types of applications because it enables easy distributed acquisition and provides enough data to manage large systems.
Here we give an example of a wireless measurement system that can establish a distributed monitoring solution for the grid to measure energy consumption, detect faults and assess signal integrity. Wireless technology is also suitable for use in the renewable energy sector, such as monitoring the energy input, output, and environmental conditions of distributed solar or wind farms. Wireless technology can also be used in residential, commercial, and industrial buildings to accurately monitor energy consumption and provide data to utilities or end users to reduce energy use.
Building monitoring
Home and building automation is a growing industry that is well suited for wireless technology. Building automation systems are used to provide information about indoor environmental conditions, protecting assets, reducing emissions, and controlling HVAC equipment or other systems within a building. Many building automation integrators need a solution that can be easily installed in existing buildings to reduce the need for costly infrastructure changes, making wireless technology more attractive than wired technology. In new buildings, wireless measurement and monitoring solutions can help users achieve LEED certification.
Machine condition monitoring
In today's fast-growing technology, market competition is becoming more and more fierce, and equipment reliability, continuous running time and operating costs will greatly affect its competitive position. In order to optimize machine predictive maintenance to optimize machine reliability and availability, monitoring health indicators such as mechanical, vibration and energy factors is a widely adopted approach. Using wireless vibration and energy monitoring equipment, reliability engineers can solve cost problems that have been difficult to solve in the past. Wireless measurements are also available for large-area or machine monitoring applications that include moving parts. The machine utilization can be effectively improved and the machine can be effectively protected.
Structural health monitoring
Engineers and scientists are using the latest sensing and measurement technologies to build smarter, safer civilian facilities around the world. Wireless technology extends measurement technology by allowing engineers to measure objects that were difficult or impossible to measure in the past. By combining modular, commercially available wireless hardware and flexible NI LabVIEW graphical programming software, engineers can make wireless measurements easier and safer, increasing the structural safety of buildings around the world.
In bridge monitoring applications, deploying wireless systems eliminates cable installation costs and allows researchers to reuse hardware between bridges, reducing the total hardware cost of taxpayers for bridge measurements. The wireless solution that eliminates the cable also solves the problem of destructive behavior such as deliberate disconnection of the cable.
Distributed temperature monitoring
Distributed temperature monitoring is an application that spans multiple domains. Food and beverage suppliers must keep perishable foods at a certain temperature throughout the cold chain. Pharmacies, hospitals, and other medical-related facilities must monitor and control the temperature of blood, drugs, and equipment. Retail stores and supermarkets must properly store perishable foods in transit, on warehouses and on shelves. The raw material manufacturer also needs to adjust the temperature of the manufacturing facility. NI wireless systems provide high-precision temperature measurements and can be combined with powerful data management software such as DIAdem to record the temperature of these products as required by law enforcement agencies.
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Wireless measurement application analysis
Overview