Method for achieving sensor data acquisition through semi-active RFID labels

Abstract

The invention provides a method for achieving sensor data acquisition through semi-active RFID labels. The method includes the following steps that (1) an RFID label reader-writer carries out status inquiry on all RFID labels within a read-write range; (2) as for RFID labels needing to be read and written, the RFID label reader-writer sends a request for reading sensor data identified by the RFID labels needing to be read and written to the RFID labels needing to be read and written, and a power supply of a sensor identified by the RFID labels needing to be read and written is activated through the RFID labels needing to be read and written; (3) data collected by the sensor in the step (2) are transmitted to the RFID label reader-writer; (4) the RFID label reader-writer transmits status information which is completely read to the RFID labels needing to be read and written in the step (2); (5) the power supply of the sensor identified by the RFID labels needing to be read and written in the step (4) is cut off. Accordingly, electric power is only consumed when sensor data need collecting, and power consumption of the whole sensor data acquisition system and system operating cost are greatly reduced.

Description

technical field [0001] The invention relates to a method for wireless sensor data collection, in particular to a method for realizing sensor data collection through semi-active RFID (radio frequency identification) tags. Background technique [0002] The Internet of things (Internet of things) is an important trend in the development of information networks at present. It is called the third wave of the world's information industry after computers and the Internet. Radio frequency identification technology RFID is one of the key technologies of the Internet of things. RFID technology is a non-contact automatic label identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. It has been widely used in recent years because of its good performance, simultaneous recognition of multiple tags, large information storage capacity and rewritable data. [0003] When reading and writing existing RFID tags, it is ...

AI Technical Summary

Problems solved by technology

[0003] When reading and writing existing RFID tags, it is often necessary to identify various sensor devices through RFID tags to monitor various parameters around the area marked by the tag, such as temperature, humidity, etc. The method often used in existing systems is The sensors are always powered on, and the background system collects the data collected by these sensors in the range of the tag identification through the network as needed, instead of only supplying power and reading data when the sensor data needs to be collected, these sensors need to be powered for a long time to work , so it needs to work in a power-powered environment, but reading and writing the measurement data of these sensors usually requires a certain time interval, so there is a lot of time in the middle when the sensor is working, but the data is not collected. In this way, most of the power consumption of the sensor data acquisition system is consumed during the non-collection period, resulting in a large waste of power resources. If the battery is powered by the battery, the service life of the battery is significantly reduced, which greatly increases the operating cost of the system.