CN101539986A

CN101539986A - Realization method for active read-only anti-demolition electronic tags

Info

Publication number: CN101539986A
Application number: CN200810034876A
Authority: CN
Inventors: 赵明; 欧海涛; 陈黄海; 耿波; 徐双; 赵春宇
Original assignee: SHANGHAI RUIFAN INFORMATION SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: SHANGHAI RUIFAN INFORMATION SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2008-03-20
Filing date: 2008-03-20
Publication date: 2009-09-23

Abstract

The invention relates to a realization method for active read-only anti-demolition electronic tags. Aiming at the requirements that an active electronic tagging system can detect the situation that tags are removed and can realize the operational stability and reliability, long service life and low cost of the anti-demolition tag, a timer consisting of a specified counter is designed to replace a microprocessor so as to control the operating mode of radio frequency circuits, and mechanical physical changes such as pressure or magnetism and the like directly trigger the changes of status bits of ID identification of the tags in an anti-demolition detection mode. The radio frequency circuits only send ID identification information of the tags in the communication status, the ID identification of the tags is fixedly written into the radio frequency circuits in production, and the ID identification of different tags is formed in an increasing or decreasing mode. On the one hand, the design method ensures that the active ready-only electronic tags have function of anti-demolition, on the other hand, the design method avoids the defects of instability and unreliability brought by using the microprocessor in the conventional active electronic tags, avoids a great deal of unwanted system overhead, and greatly reduces the power consumption and the cost of the tags simultaneously.

Description

A kind of implementation method of active read-only anti-demolition electronic tags

Affiliated technical field

The present invention relates to a kind of implementation method that is applicable to the low-power consumption active electronic tag.

Background technology

The patent No. and denomination of invention be respectively US6172609 and " Reader for RFID System " (reader of electronic label identification system) U.S. Patent Publication a kind of technology of electronic label reader.This reader only can be used for passive label, and its shortcoming is that reading efficiency is low, and distance is limited, and the reader emissive power is bigger, existing other equipment is produced disturb easily.

The patent CN1584910A of the People's Republic of China (PRC)---" a kind of reading method of electronic tag " announced a kind of reading technique of active label, but there is following shortcoming in it: 1) active label is to be attached on object in using, then can not be discerned this object after adhering to object and removing when label, security can not ensure in therefore using; 2) inner CPU or the microprocessor of adopting of label controlled, and is subjected to external interference in the long-time execution of the firmware program of CPU easily and makes label job insecurity or program crash, and can't recover to cause label not work; 3), also be at any time at consumed energy, so can't guarantee battery problem in serviceable life although CPU is in low power mode of operation; 4) cost of whole label is too high.

Summary of the invention

Existing label can't guarantee illegally to be removed in the electronic tag of existing source in order to overcome, functional reliability is low, power consumption is bigger, cost is than problems such as height, the present invention proposes the realization mechanism of a kind of rational active read-only anti-demolition electronic tags system, its particular content comprises the method for designing that discards tradition, in active electronic label, do not use any CPU or microprocessor, promptly do not control radio circuit work with program by microprocessor, but manage and control the duty of radio circuit by the timer that devices at full hardware realizes, and adopt mechanical-physical mode tags detected such as pressure or magnetic to remove state, the notice radio circuit sends the Radio Frequency ID id signal of saltus step, can realize active read-only anti-demolition electronic tags very effectively like this, and functional reliability is very guaranteed, solves the problem and reduce the label cost significantly in serviceable life of active read-only anti-demolition label simultaneously.

The present invention's technical scheme that is adopted of dealing with problems is: adopt the active read-only electronic labelling system, replace the work that microprocessor is controlled radio circuit by the timer that constitutes by hardware counter, the ID identification information of label itself is just launched in the work of radio circuit, and this ID sign is just fixedly finished writing when radio circuit is produced in the mode of increasing or decreasing.Tamper adopts passive pressure or magnetic mechanical physics mode to be connected on the recognition object, make the variation that is converted to electric signal when label by the state transition when recognition object removes, cause a certain mode bit of label ID sign to change, make label possess the tamper function like this, reliable operation no longer is limited by the stable constraint of little processing and program, owing to saved expensive microprocessor and peripheral circuit thereof in the label, make its power consumption and cost all reduce significantly, to reach high reliability, super low-power consumption and long-life purpose.

The active read-only anti-demolition electronic tags system that the present invention realizes is made up of electronic tag and reader, and label comprises power supply, clock, timer, the tamper test section, and radio circuit, reader comprises power supply, clock, microprocessor, host interface module and radio-frequency module.

Active read-only electronic tag mode of operation among the present invention is as follows:

● under the default situation, electronic tag is installed attached to being identified on the object, is in normal off working state a always, only clock sum counter operation on the label at this moment, and all the other modules all are in off working state, and power consumption is extremely low;

● after rolling counters forward reaches a Fixed Time Interval T1, the electronic tag radio circuit is triggered and wake-up, enter communications status b, send tag identifier information (radio circuit emission state, the identification information of each label is fixed, produce by radio circuit), radio-frequency module only is in emission state on the label at this moment, and the time cycle of emission is T2;

● after T2 finished, label was got back to normal off working state a again, entered next communications status b again after rolling counters forward reaches next Fixed Time Interval T1 by the time;

● the sign ID of different labels adopts the increasing or decreasing mode to be formed by radio circuit, fixing can not the modification in the life cycle of label;

● when label is removed, machinery takes place in the tamper test section or physical state changes, trigger a certain mode bit change in the label ID sign in the radio circuit, at this time when counter reaches period of time T 1, just enter the ID identification information after communications status T2 transmission is changed;

● when label recovered the normal mounting state, the machinery or the physical state of tamper test section returned to the original position, and what still send in the cycle at T2 is original ID identification information.Otherwise, send the ID identification information that changes in the cycle at T2 always.

By the microprocessor in the cancellation label, come regularly to trigger radio circuit transmission constant mark information by counter, adopt mechanical-physical modes such as pressure or magnetic to carry out the connection status of tags detected and recognition object, when being removed, change a certain mode bit of ID sign, this is that on behalf of label, the ID signal that sends just be removed, the active read-only anti-demolition electronic tags of Shi Xianing is with the dirigibility of sacrificial system thus, obtain low-cost tamper active label, and high workload reliability and long service live are provided.

Description of drawings

Fig. 1 is system's pie graph of a kind of implementation method of active read-only anti-demolition electronic tags.

Fig. 2 is the supervisor status figure of a kind of implementation method of active read-only anti-demolition electronic tags.

The timer that 1 expression counter constitutes among the figure, 2 expression radio circuits, 3 expression clocks, 4 expression power supplys, 5 expression host interface modules, 6 expression active read-only motion detection electronic tags, 7 expression readers, 8 expression microprocessors, the tamper test section of 9 expression pressure or magnetic mechanical physics mode; A represents normal inoperative dormant state, and b represents communications status.

Embodiment

6 are in state a under the normal condition;

Rolling counters forward work triggers 2 b that get the hang of after the some cycles time T 1;

The time span of state b is T2, finishes in the cycle that at T2 the ID label of label is sent task, 6 return state a then after T2 finishes;

When label by when recognition object removes, saltus step takes place and causes that the ID identification information changes in the tamper test section, just sends the ID identification information that changes in ensuing T2 state, T2 finishes then 6 to return a;

Reenter the circulation of next round duty.

Claims

1. a kind of implementation method of active read-only anti-demolition electronic tags, it is characterized in that: according to the operating characteristic of active electronic label, adopt polymorphic administrative mechanism, the timer that constitutes with counter replaces the duty that microprocessor is controlled radio circuit, adopt mechanical-physical mode tags detected such as pressure or magnetic by removing from recognition object, and initiation label ID identify a certain mode bit saltus step.Radio circuit only sends the ID identification information of label self when communications status, this identification information fixedly is written in the radio circuit when being production, need not control able to programme.Realized the active read-only anti-demolition label with pure hardware mode like this, the connection status of tags detected and recognition object in real time, and avoid unnecessary system overhead, and eliminate the danger of the label job insecurity that brings by microprocessor, reduce power consumption and cost simultaneously greatly.