CN202548870U - RFID system - Google Patents

RFID system Download PDF

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Publication number
CN202548870U
CN202548870U CN2011203420020U CN201120342002U CN202548870U CN 202548870 U CN202548870 U CN 202548870U CN 2011203420020 U CN2011203420020 U CN 2011203420020U CN 201120342002 U CN201120342002 U CN 201120342002U CN 202548870 U CN202548870 U CN 202548870U
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China
Prior art keywords
label
reading device
microprocessor
rfid system
magnetic
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Expired - Fee Related
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CN2011203420020U
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Chinese (zh)
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魏中海
宋晓辉
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魏中海
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Abstract

The utility model discloses an RFID system which comprises a label, a long distance reader and a close distance reader. After wake-up frequency F1 from the long distance reader is detected by the label through a timing wake-up mechanism, label information is sent to the long distance reader through interaction frequency F2. The label is equipped with a magnetic detection device. The close distance reader is provided with a magnetic field generating device. After a magnetic field from the close distance reader is detected by the magnetic detection device of the label, the label is triggered to send label information to the close distance reader through frequency F3. The RFID system of the utility model has functions of both close distance and long distance radio frequency identification, can meet demands of long distance identification in a wide scope, and is simple in structure and low in cost.

Description

A kind of rfid system
Technical field
The utility model relates to the REID field, relates in particular to a kind of rfid system that has close distance radio frequency recognition function and long-range radio-frequency recognition function simultaneously.
Background technology
RFID (Radio Frequency IDentification, radio frequency identification) is a kind of contactless automatic identification technology, and its ultimate principle is a characteristic of utilizing radiofrequency signal and space thereof to be coupled, to transmit, realizes the automatic identification to static or mobile object.Rfid system can be fast, accurately, recognition objective object reliably, be widely used in fields such as logistic track, communications and transportation, personnel positioning and asset management.
By the internal battery power supply, its communication distance is far away usually for active electronic label, and reader can read active electronic label information with remote mode.And passive electronic label charged pool not, the electromagnetic wave that its emission electric wave and internal processor operation institute energy requirement all produce from reader, reader need read passive electronic label information with in-plant mode.
In some application scenarios, need the RFID label closely to be discerned by distance, such as consumption, the gate inhibition; Also require the RFID label can be simultaneously, such as accessible work attendance, location etc. on a large scale by remote identification.The patent No. is that 201020258161.8 Chinese patent document discloses a kind of pair of agreement same frequency composite card; The passive RFID chip that meets ISO15693 of same frequency and the CPU the core of the card sheet that meets the ISO14443 chip are installed on the same card, realize label closely with the function of long-range radio-frequency identification.Wherein, the reading/writing distance of passive RFID chip is less than 5mm, and the reading/writing distance of CPU the core of the card sheet is less than 1.3m.Also have directly passive label is pasted on the active label surface, realize the complex function of closely identification and remote identification.
But reading apart from less than 1.3m of the long distance identification function of above-mentioned composite card can not be satisfied the farther distance demand that numerous labels are discerned simultaneously on a large scale.And this composite card is to be packaged together the label of two kinds of different mechanisms is bonding, and cost is high, is unfavorable for producing in enormous quantities that the interference of the label of important different mechanisms between mutually influences the performance of reader reading tag.
Summary of the invention
The utility model embodiment proposes a kind of rfid system; Realize closely and the long-range radio-frequency recognition function through different enable mode respectively, can satisfy the demand of remote identification on a large scale, also can satisfy closely the demand of identification one by one; And simple in structure, cost is low.
The rfid system that the utility model embodiment provides comprises label, remote reader and near-distance reading device;
Said label comprises first microprocessor, first RF transceiver, a PCB omnidirectional antenna, magnetic detection device and first power module; Said first microprocessor is connected with said first RF transceiver, magnetic detection device respectively, and said first RF transceiver is connected with a said PCB omnidirectional antenna;
Said remote reader comprises second microprocessor, two-way RF transceiver and antenna at least; After said label detects the wakeup frequency F1 from said remote reader through timing wake-up mechanism, send label information to said remote reader through frequency of interaction F2;
Said near-distance reading device comprises the 3rd microprocessor, the 3rd radio frequency transceiver, the 3rd PCB directional antenna and field generator for magnetic; Said field generator for magnetic is connected with said the 3rd microprocessor, is used to produce magnetic field; After the magnetic detection device of said label detects the magnetic field from said near-distance reading device, trigger label and send label information to said near-distance reading device with frequency F3.
Wherein, the magnetic detection device of said label comprises tongue tube; The two ends of said tongue tube are connected with two I/O mouths of said first microprocessor respectively.The field generator for magnetic of said near-distance reading device comprises magnet or hot-wire coil.
The rfid system that the utility model embodiment provides; Active label is respectively through intercepting the activation signal and the activation signal of induction from near-distance reading device magnetic field from remote reader; Realize closely and the long-range radio-frequency recognition function that it is simple in structure, reliability is high; Reduce cost, had very big application market space.And, the transmitted power that the reading/writing distance of near-distance reading device and remote reader can be through regulating radiofrequency signal with accept sensitivity and realize, thereby satisfy the demand of remote identification on a large scale.
Description of drawings
Fig. 1 is the circuit module figure of the label that provides of the utility model embodiment one;
Fig. 2 is the circuit module figure of the remote reader that provides of the utility model embodiment two;
Fig. 3 is the circuit module figure of the near-distance reading device that provides of the utility model embodiment three;
Fig. 4 is the structural representation of the near-distance reading device that provides of the utility model embodiment four.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment will be carried out clear, intactly description.
The rfid system that the utility model embodiment provides comprises label, remote reader and near-distance reading device; Active label is respectively through intercepting from the activation signal of remote reader and the activation signal of induction from near-distance reading device magnetic field, realizes closely and the long-range radio-frequency recognition function.
Referring to Fig. 1, be the circuit module figure of the label that provides of the utility model embodiment one.
The label that present embodiment provides comprises: first microprocessor 11, first RF transceiver 12, a PCB omnidirectional antenna 13, magnetic detection device 14 and first power module 15.Wherein, first microprocessor 11 is connected with first RF transceiver 12, magnetic detection device 14 respectively, and first RF transceiver 12 is connected with a PCB omnidirectional antenna 13.
Preferably, the magnetic detection device 14 of label comprises tongue tube; The two ends of tongue tube are connected with two I/O mouths of first microprocessor 11 respectively.
Referring to Fig. 2, be the circuit module figure of the remote reader that provides of the utility model embodiment two.
The remote reader that present embodiment provides comprises: second microprocessor 21, two-way RF transceiver (RF transceiver RF1 as shown in Figure 2 and RF transceiver RF2), antenna and second source module 25 at least.Preferably, said antenna is external whiplike omnidirectional antenna or tabular directional antenna.
As shown in Figure 2, second microprocessor is connected with RF transceiver RF1, RF transceiver RF2 respectively, and RF transceiver RF1 is connected with external antenna 22, and RF transceiver RF2 is connected with external antenna 23.In addition, the remote reader that provides of present embodiment also comprises second data-interface 24 that is used to transmit data; Second data-interface 24 is connected with second microprocessor 21.Preferably, second data-interface 24 is the RS232/485 interface.
In the middle of practical implementation, after label detects the wakeup frequency F1 from remote reader through timing wake-up mechanism, send label information to remote reader, thereby realize the long-range radio-frequency recognition function through frequency of interaction F2.
Referring to Fig. 3, be the circuit module figure of the near-distance reading device that provides of the utility model embodiment three.
The near-distance reading device that present embodiment provides comprises: the 3rd microprocessor 31, the 3rd radio frequency transceiver 32, the 3rd PCB directional antenna 33, field generator for magnetic 34 and the 3rd power module 35.Wherein, the 3rd microprocessor 31 is connected with the 3rd radio frequency transceiver 32, field generator for magnetic 34 respectively, and the 3rd radio frequency transceiver 32 is connected with the 3rd PCB omnidirectional antenna 33.Preferably, field generator for magnetic 34 comprises magnet or hot-wire coil, is used to produce magnetic field.
In the middle of practical implementation, after the magnetic detection device of label detects the magnetic field from the near-distance reading device, trigger label and send label information to the near-distance reading device, thereby realize the close distance radio frequency recognition function with frequency F3.
As shown in Figure 3, the near-distance reading device that present embodiment provides also comprises the 3rd data-interface 36 that is used to transmit data; The 3rd data-interface 36 is connected with the 3rd microprocessor 31.Preferably, the 3rd data-interface 36 is USB interface or RS232 serial ports.During practical implementation, after the near-distance reading device passes through the 3rd data-interface 36 and outside computing machine is connected, can transmit data with computing machine.When the 3rd data-interface 36 adopted USB interface, the near-distance reading device can also obtain working power from computing machine through the USB passage.
In addition, as shown in Figure 3, the near-distance reading device that present embodiment provides also comprises pilot lamp 37 and hummer 8.Pilot lamp 37, hummer 38 are connected with the 3rd microprocessor 31 respectively.During practical implementation, after near-distance reading device reading tag information, can send cue through pilot lamp 37, hummer 38.
Referring to Fig. 4, be the structural representation of the near-distance reading device that provides of the utility model embodiment four.
The near-distance reading device that this instance provides also comprises shell 301, on shell 301, indicates the read area 302 that is useful on read write tag; The magnetic field that field generator for magnetic 34 is produced is covered in read area 302.Preferably, as shown in Figure 4, field generator for magnetic 34 comprises four magnet 303, is installed in enclosure interior respectively, and is positioned at read area 302 inboards, and the magnetic field of four magnet 303 generations can cover read area 302.
Optional, as shown in Figure 4, can the 3rd data-interface 36, pilot lamp 37 and hummer 38 be installed on the shell 301, conveniently to use and to observe the duty of card sender.
The rfid system that present embodiment provides has remote and close distance radio frequency recognition function, describes in detail in the face of the principle of work of rfid system down.
(1) long-range radio-frequency identification
After remote reader powers on, continue to send wake-up signal, continue to intercept label with frequency F2 simultaneously, wait for the information that receives label with frequency F1.
Label is in dormant state at ordinary times, adopts timing wake-up mechanism timing wake-up label, triggers the wakeup frequency F1 of the RF transceiver detecting of label from remote reader.After label detects wakeup frequency F1, through frequency of interaction F2 label information (for example tag serial number) is sent to remote reader, and wait for that remote reader returns confirmation.If label does not receive confirmation, then send label information to remote reader once more.
During practical implementation, the transmitted power through regulating radiofrequency signal with accept sensitivity, can adjust the reading/writing distance of remote reader, make remote reader operating distance be not less than 30 meters, thereby the demand that numerous labels are discerned simultaneously in satisfying on a large scale.
(2) close distance radio frequency identification
Be convenient explanation, it is example that present embodiment only adopts tongue tube to detect magnetic field with label.Tongue tube can be normally closed also can be often to open; The tongue tube two ends are connected respectively to 2 input/output ports of microprocessor; One as the input port; One as delivery outlet, when the level of one of them input port from the level of hypermutation another delivery outlet when low also from high step-down, show that tongue tube detects magnetic field.
Label adopts tongue tube to continue the magnetic field of detecting from the near-distance reading device in the process of dormancy.When label during near the read area of near-distance reading device, label detects the magnetic field of near-distance reading device immediately, and label sends label information with frequency F3 to the near-distance reading device.
After near-distance reading device reading tag information, send cue through pilot lamp or hummer.Therefore, label after the near-distance reading device sends label information, need not wait for that the near-distance reading device returns confirmation with frequency F3.Only detect that magnetic field disappears and when detecting magnetic field once more and existing when label; Just need to send label information to the near-distance reading device again; And wait for that the near-distance reading device returns confirmation; Thereby avoided unexpected magnetic field to cause the frequent transmission of label, increased power consumption, and reduced the problem in the life-span of label.For example, when label during near the magnetic field of non-near-distance reading device, label can not be received the affirmation information that the near-distance reading device returns after sending label information, and label can not send label information once more.When label near the near-distance reading device, and the near-distance reading device is not when reading label information, once more near the near-distance reading device, the information that label sends adopts link layer encryption after only need taking away label, has guaranteed safety of data.Intercept the information that label sends near magnetic field at regular intervals in order to prevent illegal listener; The number of times that label disappears again after setting and allowing magnetic field to occur in the special time; When the number of times that surpasses this setting; Label will just detect magnetic field once more after the longer stand-by period, thereby will have prevented effectively illegally to intercept, and reduce the power consumption of label simultaneously.
After the near-distance reading device powered on, frequency of utilization F3 continued to intercept the information from label, and its magnetic field of activating label can be produced by high performance magnet, is perhaps produced by hot-wire coil, and the center intensity point in its magnetic field is corresponding to the label read area.Near-distance reading device shell is provided with pilot lamp or hummer, after the near-distance reading device is read label information, sends cue through pilot lamp or hummer immediately.
The rfid system that the utility model embodiment provides; Active label is respectively through intercepting from the magnetic field of near-distance reading device and the activation signal of remote reader; Realize closely and the long-range radio-frequency recognition function that it is simple in structure, reliability is high; Reduce cost, had very big application market space.And, the transmitted power that the reading/writing distance of near-distance reading device and remote reader can be through regulating radiofrequency signal with accept sensitivity and realize, thereby satisfy the demand of remote identification on a large scale.
The above is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection domain of the utility model.

Claims (8)

1. a rfid system is characterized in that, comprises label, remote reader and near-distance reading device;
Said label comprises first microprocessor, first RF transceiver, a PCB omnidirectional antenna, magnetic detection device and first power module; Said first microprocessor is connected with said first RF transceiver, magnetic detection device respectively, and said first RF transceiver is connected with a said PCB omnidirectional antenna;
Said remote reader comprises second microprocessor, two-way RF transceiver and antenna at least; After said label detects the wakeup frequency F1 from said remote reader through timing wake-up mechanism, send label information to said remote reader through frequency of interaction F2;
Said near-distance reading device comprises the 3rd microprocessor, the 3rd radio frequency transceiver, the 3rd PCB directional antenna and field generator for magnetic; Said field generator for magnetic is connected with said the 3rd microprocessor, is used to produce magnetic field; After the magnetic detection device of said label detects the magnetic field from said near-distance reading device, trigger label and send label information to said near-distance reading device with frequency F3.
2. rfid system as claimed in claim 1 is characterized in that, the radiofrequency signal that the RF transceiver RF1 of said remote reader sends frequency F1 is used to activate label; The RF transceiver RF2 of said remote reader is used to receive the information of label and returns the label confirmation.
3. rfid system as claimed in claim 2 is characterized in that, said remote reader also comprises second data-interface that is used to transmit data; Said second data-interface is connected with said second microprocessor;
Said second data-interface is USB interface or RS232/485 interface.
4. like each described rfid system of claim 1~3, it is characterized in that the magnetic detection device of said label comprises tongue tube; The two ends of said tongue tube are connected with two I/O mouths of said first microprocessor respectively.
5. rfid system as claimed in claim 4 is characterized in that, the field generator for magnetic of said near-distance reading device comprises magnet or is used to produce the hot-wire coil in magnetic field.
6. rfid system as claimed in claim 3 is characterized in that, said near-distance reading device also comprises shell; Show the read area that is useful on read write tag at the shell subscript; The magnetic field that said field generator for magnetic produced is covered in said read area.
7. rfid system as claimed in claim 6 is characterized in that, said near-distance reading device also comprises the 3rd data-interface that is used to transmit data; Said the 3rd data-interface is connected with said the 3rd microprocessor;
Said the 3rd data-interface is USB interface or RS232 serial ports.
8. rfid system as claimed in claim 7 is characterized in that, said near-distance reading device also comprises pilot lamp and hummer; Said pilot lamp, hummer are connected with said the 3rd microprocessor respectively;
Said pilot lamp, hummer are installed in respectively on the said shell.
CN2011203420020U 2011-09-13 2011-09-13 RFID system Expired - Fee Related CN202548870U (en)

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Application Number Priority Date Filing Date Title
CN2011203420020U CN202548870U (en) 2011-09-13 2011-09-13 RFID system

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Application Number Priority Date Filing Date Title
CN2011203420020U CN202548870U (en) 2011-09-13 2011-09-13 RFID system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106886733A (en) * 2015-12-15 2017-06-23 江苏稻源微电子有限公司 The method for safely carrying out and equipment of a kind of ultrahigh frequency RFID electronic tag
CN107392296A (en) * 2017-07-14 2017-11-24 国电南瑞科技股份有限公司 A kind of intelligent sensing label for equipment detection
CN112178705A (en) * 2019-07-01 2021-01-05 青岛海尔智能技术研发有限公司 Cooking utensil and kitchen range

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106886733A (en) * 2015-12-15 2017-06-23 江苏稻源微电子有限公司 The method for safely carrying out and equipment of a kind of ultrahigh frequency RFID electronic tag
CN107392296A (en) * 2017-07-14 2017-11-24 国电南瑞科技股份有限公司 A kind of intelligent sensing label for equipment detection
CN112178705A (en) * 2019-07-01 2021-01-05 青岛海尔智能技术研发有限公司 Cooking utensil and kitchen range

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