Method and device for reading electronic tag data under condition of multiple reader-writers

Abstract

The invention relates to a method for reading electronic tag data under the condition of multiple reader-writers. The method for reading electronic tag data under the condition of the multiple reader-writers includes the following steps: carrying out detection of signal strength on a signal channel which is used for sending an echo signal after an electronic tag is activated, judging whether interference or collision exists in the signal channel or not in the present moment, and executing a next step if the interference or the collision exists in the signal channel, otherwise, starting to acquire electronic tag data; confirming a current threshold value according to a signal strength value and acquiring a time delay value which corresponds with the current threshold value; enabling the reader-writers to be in a waiting state and carrying out delay timekeeping; and judging whether the timekeeping reaches the time delay value, and enabling the reader-writers to start to send exciting signals in a set read-write time and acquire the electronic tag data if the timekeeping reaches the time delay value. The invention further relates to a device for achieving the method. The method and the device for reading the electronic tag data under the condition of the multiple reader-writers have the advantages of being simple to achieve and low in cost.

Description

technical field [0001] The invention relates to the field of radio frequency identification, and more specifically relates to a method and device for reading electronic tag data in a multi-reader environment. Background technique [0002] At present, with the wide application of radio frequency identification technology, there are more and more situations where multiple readers work together. Multiple readers are adjacent to each other, which will cause mutual interference or collision between readers, so that multiple readers cannot work normally, and the efficiency of card reading is greatly reduced. For example, when charging without stopping at a road and bridge toll station, the readers of multiple lanes and the long-distance readers of the parallel entrances of the parking lot will interfere or collide with each other. Interference or collision of multi-readers is mainly divided into two types: the first is interference or collision between readers and readers: figur...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a relatively simple and low-cost method for reading electronic tag data in a multi-reader environment in view of the defects of the prior art that the above-mentioned implementation is relatively complicated and the cost is high and devices

Images