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Wu Nanjian, a researcher at the State Key Laboratory of Superlattices, Institute of Semiconductors, Chinese Academy of Sciences, developed a low-power passive/semi-passive dual-mode wireless temperature and humidity sensor. The relevant research results were published in IEEE SENSORS JOURNAL, a journal of the field of sensors. The paper was selected as the top 50 hot topics of the journal in February and March 2015.
Wireless temperature and humidity sensors have very broad application prospects in areas such as high-risk environmental monitoring, emergency rescue, advanced logistics and warehousing systems, equipment monitoring, building monitoring and cultural relics monitoring, but the power consumption and cost of wireless sensors severely limit the wireless sensor network. Large-scale application. With the support of the National Natural Science Foundation of China and the National Science and Technology Support Project, the research team has developed a low-cost low-power passive/semi-passive dual-mode wireless temperature and humidity sensor that is fully compatible with existing commercial UHF RFID systems. .
The sensor adopts a self-developed core chip that can achieve high-efficiency electromagnetic wave energy acquisition, identification, temperature and humidity measurement, data processing and wireless communication functions. The maximum working distance of the sensor can reach 6 meters. The sensor complies with the ISO18000-6C international standard and can be operated through existing commercial UHF RFID readers. It can also support sensors with a wide range of other functions. The use of such a sensor is expected to integrate the wireless sensor network into the existing UHF RFID system, thereby significantly reducing the application cost of the wireless sensor network and enhancing the market competitiveness of the wireless sensor network.
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