CN102117424A

CN102117424A - Active RFID (radio frequency identification device) tamper-proof label based on optical transmission data detection

Info

Publication number: CN102117424A
Application number: CN2009102475112A
Authority: CN
Inventors: 欧海涛; 徐双; 赵明
Original assignee: SHANGHAI RUIFAN INFORMATION SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: SHANGHAI RUIFAN INFORMATION SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2011-07-06

Abstract

The invention discloses an active RFID (radio frequency identification device) tamper-proof label based on optical transmission data detection. For overcoming the problems that the existing active tamper-proof label cannot effectively ensure to detect illegal tamper, and is low in safety and high in failure rate, and the like, the active radio frequency identification technology and the optical transmission channel data real-time detection technology are combined to form the RFID tamper design based on the optical transmission data detection, An active tamper-proof label ID number is formed by combining fixed ID identifying information built in a radio frequency identification unit and an optical transmission channel data state condition code which is obtained by using an internal micro processing unit of the radio frequency identification to control and detect the state of data in an optical transmission channel dynamically in real time. The tamper-proof label only sends out number information consisting of the fixed ID identity and the state condition code of the label in a periodic small time in a wireless mode, and is at the dormant state normally.

Description

Active RFID tamper label based on the light transmission Data Detection

Affiliated technical field

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

Background technology

People's Republic of China's patent 200810034876.2 " a kind of implementation method of active read-only anti-demolition electronic tags " and 200820059466.9 " anti-dismounting electronic tag " has been announced the tamper method for designing of two kinds of active labels, but there is following shortcoming in it: 1) adopt pressure or magnetic in the active label tamper design, mechanical-physical methods such as plain conductor constitute the electronic loop mode and protect active label attached to not being removed on the object, these mechanical-physical methods are easily by with bypass, plain modes such as short circuit are broken through, and system can not provide enough safeguard protections; 2) mechanical-physical methods such as the pressure of Cai Yonging or magnetic, plain conductor rely on the electronic loop on off operating mode that constitutes under this mode are detected, do not adopt higher transmission data mode of security or the more physical electrical states of detected transmission medium to come the loop is protected, the safeguard protection means are single, security is not high; 3) these mechanical-physical methods formation electronic loops are relatively poor to complicated external environment condition adaptability such as humidity, immersion, cause the tamper fail-safe or cause active label body fault etc.;

Summary of the invention

Existingly in the existing active tamper label can't guarantee effectively that illegal the dismounting detect in order to overcome, security is not high, problems such as failure rate height, the present invention proposes active RFID tamper label realization mechanism based on full light transmission Data Detection, its particular content comprises the method for designing that discards tradition, in active electronic label, do not use any mechanical-physical mode to constitute electronic loop and carry out the tamper realization, but adopt the optical circuit that constitutes based on optical fiber, by the light Data Detection of transmitting in the loop being realized the tamper design, this mechanism has high class of safety protection, good external complex environmental suitability, very high functional reliability has solved the problem that the detection of electric loop is brought under the mechanical-physical mode fully.

The present invention's technical scheme that is adopted of dealing with problems is:

Adopt active radio frequency recognition technology and the real-time detection technique of optical delivery channel data to combine, formation is based on the RFID tamper design of full light transmission Data Detection, and active tamper label id number is made of the status flag code combination of radio frequency identification unit built-in fixedly ID identification information and optical transmission data.Radio frequency identification unit built-in fixedly ID identification information is that the mode with increasing or decreasing produces when the tamper label is produced, and is immutable; The status flag sign indicating number of optical delivery channel data is that control of inside microprocessing unit and the detection optical transmission channel optical signal data by radio frequency identification dynamically obtains, when data changed on the optical delivery passage that is formed by optical fiber, the variation that is converted to electric signal by the optical delivery testing circuit formed the status flag sign indicating number.The less radio-frequency microprocessing unit of tamper label and the work of radio circuit are just launched self fixedly number information of ID sign and status flag sign indicating number composition by wireless mode in a little time window, microprocessing unit and radio circuit enter into dormant state again, make its power consumption reduce significantly, to reach high reliability, super low-power consumption and long-life purpose.

The active RFID tamper label based on the light transmission Data Detection that the present invention realizes is made up of active radio frequency recognition unit and optical channel Data Detection unit, comprises power supply, clock, timer, optical channel data detection circuit, optical fiber, radio circuit, microprocessor.

The active RFID tamper label mode of operation based on the light transmission Data Detection among the present invention is as follows:

● under the default situation, the tamper label 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, microprocessor is waken up, enter communications status b, microprocessor wakes the optical channel data detection circuit up data mode in the optical channel is detected, trigger radio circuit simultaneously and send the tag identifier information of forming by built-in fixedly ID identification information and optical transmission data status flag sign indicating number, radio-frequency module is in emission state on the label at this moment, and the time cycle of detection and 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 just fixedly writes when adopting the increasing or decreasing mode by production, fixing can not the modification in the life cycle of label;

● when label is removed or when attacked by other malice means, make the data mode of transmitting in the optical channel that constitutes by optical fiber change, detect this state and change the status flag sign indicating number by the optical channel data detection circuit, at this time when counter reaches period of time T 1, just enter the identification information that communications status T2 sends by built-in fixedly ID identification information and the status flag sign indicating number after being changed is formed;

Description of drawings

Fig. 1 is the system's pie graph based on the active RFID tamper label of light transmission Data Detection.

Fig. 2 is the supervisor status figure based on the active RFID tamper label of light transmission Data Detection.

The timer that 1 expression counter constitutes among the figure, 2 represent radio circuits, 3 expression clocks, 4 expression power supplys, 5 expression optical fiber, 6 expressions are based on the active RFID tamper label of light transmission Data Detection, and 7 represent microprocessors, 8 expression optical channel data detection circuits; 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 at T2 that the optical channel data mode detects and the identification information of label sends task, 6 return state a then after the T2 end;

When label by when recognition object removes, the optical channel data that are made of optical fiber change and cause status flag sign indicating number information change in the ID sign, just send in ensuing T2 state and contain the identification information that the status flag sign indicating number changes, T2 finishes then 6 to return a;

Reenter the circulation of next round duty.

Claims

1. based on the active RFID tamper label of light transmission Data Detection, it is characterized in that: according to the operating characteristic of active electronic label, the optical circuit that employing constitutes based on optical fiber, carry out the tamper design by full light transmission Data Detection and realize that tags detected is by removing from recognition object, and the saltus step of initiation status flag sign indicating number, the identification information that active RFID tamper label sends is made of built-in fixedly ID identification information and optical delivery channel data status flag code combination.This mechanism has high class of safety protection, well external complex environmental suitability, very high functional reliability, has solved under the mechanical-physical mode electric loop fully and has detected the problem of being brought.