UWB-based wireless measurement system

Abstract

The invention belongs to the field of wireless measurement systems, and relates to a UWB-based wireless measurement system. The system comprises sensor nodes, aggregation nodes and a measurement and control center, wherein the sensor nodes are connected with the aggregation node through a UWB network, and the aggregation node is connected with the measurement and control center through a wirelessnetwork; the aggregation nodes and the sensor nodes adopt a low-power-consumption design, the aggregation nodes acquire electric energy through solar energy, and the sensor nodes acquire electric energy through an alternating magnetic field formed by power line current; the aggregation node obtains standard time and position information through a GPS, the sensor nodes do not contain the GPS, and time synchronization between the aggregation node and the sensor nodes is achieved in the data communication process through a time synchronization mechanism; the sensor nodes stamp a timestamp and a sampling period on sampling data and send the sampling data to the aggregation node, the aggregation node forwards the sampling data of the sensor nodes to the measurement and control center, and meanwhile, the aggregation node temporarily stores the sampling data locally. According to the invention, time synchronization is realized in the data communication process, and the power consumption and the implementation cost are low.

Description

technical field [0001] The invention belongs to the field of wireless measurement systems, and relates to a UWB-based wireless measurement system. Background technique [0002] The wireless measurement system provides a feasible network solution for occasions where it is inconvenient to connect through a wired network. The timestamp attribute is as important as the dimension attribute and location attribute of physical quantities (such as temperature, humidity, and light intensity, etc.). It is meaningless for a sampled data object to have only numerical values ​​without the time and place where the data was generated. In data communication, physical quantities are given by variable names. For occasions where communication is very reliable (such as wired communication) and time synchronization is not required, the current time of data sampling obtained after communication can be used as the time stamp; but for communication Not very reliable (such as wireless communication)...

AI Technical Summary

Problems solved by technology

However, this requires each wireless measurement node to install a GPS or Beidou system timing module, which not only increases the cost, but also increases energy consumption, which is not allowed in many wireless measurement systems

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