CN103903030A - Method for achieving sensor data acquisition through semi-active RFID labels - Google Patents

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

Realize the method for sensor data acquisition by half active RFID tag

Technical field

The present invention relates to a kind of method that wireless sensor data gathers, be specifically related to a kind of method that realizes sensor data acquisition by half active RFID (radio frequency sets) label.

Background technology

Internet of Things (Internet of things) is the important trend of current information networking development, is called as computing machine, the internet third wave of world's information industry afterwards, and radio RF recognition technology RFID is one of gateway of internet of things key technology.RFID technology is a kind of contactless label automatic identification technology, it is automatically identified destination object and is obtained related data by radiofrequency signal, with its identification can radio read-write, strong, the distance of signal penetration capacity, long service life, good environmental adaptability, can many labels identify simultaneously, the advantage such as the large and data of information storage capacity can be rewritten, be used widely in recent years.

When existing RFID label read-write, usually need to identify various senser elements by RFID label, with monitoring tag identifier region various parameters around, as temperature, humidity etc., the way usually adopting in existing system is that sensor is all the time in "on" position, background system gathers by network the data that these sensors in tag identifier scope gather as required, rather than only in the time of needs pick-up transducers data, just it is powered and reading out data, these sensors are due to the long-time powered operation of needs, thereby need to be operated in the environment of Power supply, but read and write the measurement data of these sensors, conventionally all need to have certain time interval, thereby there is a large amount of timers centre at work, but data are not collected, most power consumptions that such mode makes sensor data acquisition system are during image data not, cause a large amount of electric power resource wastes, if in by battery powered situation, battery significantly reduces, the job costs of system are greatly increased.

Summary of the invention

The object of the invention is the power consumption for reducing wireless sensor data acquisition system, save electric power, improve the serviceable life of battery in battery power supply system, and then reduce the job costs of system.

For achieving the above object, the present invention is by the following technical solutions:

A kind of method that realizes sensor data acquisition by half active RFID tag is provided, comprises the following steps:

(1) RFID tag read-write equipment carries out status poll to all RFID labels within the scope of read-write;

(2) the RFID label to needs read-write, the request that RFID tag read-write equipment sends to it sensing data that reads this tag identifier, the power supply of the sensor of this its mark of tag activation;

(3) described in step (2), the data of sensor collection send RFID tag read-write equipment to;

(4) RFID tag read-write equipment sends to the RFID label described in step (2) status information having read;

(5) RFID label described in step (4) cuts off the power supply of the sensor of its mark.

The present invention uses half active RFID tag to carry out wireless sensor data collection, only instantaneous activated sensors power supply during needing pick-up transducers data, timely cut-out probe power after data acquisition completes, make it treat wake-up states in dormancy, not power consumption not substantially when image data; In the time that sensor adopts powered battery, the replacement cycle significant prolongation of battery.Like this, power consumption and the system works cost of whole sensor data acquisition system reduce greatly.

Embodiment

RFID tag read-write equipment is according to the needs of wireless sensor data acquisition system, first all RFID labels of read write line read-write scope are sent to inquiry request, then read write line selects to need the RFID label of read-write as required, send the request of reading the sensor identifying with this RFID tag identifier, at this time this RFID label obtains read write line reading command, activate the power supply being connected with it, make the sensor of RFID tag identifier in energising duty, when all the sensors data send back data after read write line within normal working hours, read write line has read relevant sensing data, send the instruction of having read to RFID label, RFID label is by dump, label, sensor all enters treats duty.

In this way, can avoid the work energy consumption of sensor in the time of image data not, the energy use efficiency of Hoisting System greatly, and by the use of semi-active label, can greatly promote the distance of read write line reading tag, thereby make single reading and writing device antenna can read and write wider sensor network.

Claims (1)

1. a method that realizes sensor data acquisition by half active RFID tag, is characterized in that: comprise the following steps:

(1) RFID tag read-write equipment carries out status poll to all RFID labels within the scope of read-write;

(2) the RFID label to needs read-write, the request that RFID tag read-write equipment sends to it sensing data that reads this tag identifier, the power supply of the sensor of this its mark of tag activation;

(3) described in step (2), the data of sensor collection send RFID tag read-write equipment to;

(4) RFID tag read-write equipment sends to the RFID label described in step (2) status information having read;

(5) RFID label described in step (4) cuts off the power supply of the sensor of its mark.