Method for estimating number of radio frequency identification tags in emergency logistics management system

A radio frequency identification tag and logistics management technology, applied in the field of estimation of the number of radio frequency identification tags in the logistics system in emergency situations, can solve problems such as long reading time, low reading rate, and slow progress of rescue work

Active Publication Date: 2015-11-25
THE THIRD MEDICAL CENT OF THE CHINESE PEOPLES LIBERATION ARMY GENERAL HOSPITAL
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AI Technical Summary

Problems solved by technology

The reading method based on the binary tree needs multiple interactions to complete the batch reading, which takes a long time to read and the reading rate is low
As a result, rescue efforts often slow down

Method used

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  • Method for estimating number of radio frequency identification tags in emergency logistics management system
  • Method for estimating number of radio frequency identification tags in emergency logistics management system
  • Method for estimating number of radio frequency identification tags in emergency logistics management system

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Embodiment Construction

[0040] The present invention will now be described in conjunction with examples.

[0041] The invention provides a method for estimating the number of radio frequency identification tags based on Aloha. After reading the tags once, the radio frequency identification reader can accurately estimate the remaining number of tags by using the reading situation, and then reasonably set the length of the frame to realize The read rate is maximized.

[0042] A method for estimating the number of radio frequency identification tags in an emergency logistics management system of the present invention comprises the following steps:

[0043] 1) The tag reader sends a read command to all tags within the coverage of the reader; order these tags to randomly select a time slot to respond within the set time length or time frame length;

[0044] 2) In a time slot, if there is no tag response, the time slot is an idle time slot; if there is only one tag response, the gap is a successful transm...

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Abstract

The invention discloses a method for estimating the number of radio frequency identification tags in an emergency logistics management system. A tag estimation method adopts a least square method to realize estimation of the number of tags, by utilization of a quadratic characteristic of the least square method, an estimation error can be well guaranteed to have relatively small mean value and variance, the number of read tags is rapidly estimated in a reading process, and the size of a reading window is adjusted in time according to the number of the tags, thereby realizing maximization of a tag reading rate, effectively shortening reading time, and powerfully supporting a disaster relief process.

Description

technical field [0001] The invention relates to the fields of signal processing and radio frequency identification, in particular to a method for estimating the quantity of radio frequency identification tags in a logistics system in emergency situations. Background technique [0002] Our country is a country with frequent natural disasters, and a large number of disaster relief materials need to be distributed during disaster relief. Due to the low distribution efficiency, there is often a phenomenon of accumulation of disaster relief materials. In order to solve this problem, it is necessary to affix a radio frequency identification tag to each disaster relief item, which can realize long-distance and large-scale reading of the tag number, realize the rapid storage and delivery of materials in the warehouse, and shorten the distribution time of disaster relief materials. [0003] At present, the methods for reading tags by radio frequency identification technology mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
Inventor 郑静晨李明陈金宏郝昱文杨宇李争平
Owner THE THIRD MEDICAL CENT OF THE CHINESE PEOPLES LIBERATION ARMY GENERAL HOSPITAL
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