CN201126583Y - Radio frequency recognizing reader-writer - Google Patents
Radio frequency recognizing reader-writer Download PDFInfo
- Publication number
- CN201126583Y CN201126583Y CNU2007201900169U CN200720190016U CN201126583Y CN 201126583 Y CN201126583 Y CN 201126583Y CN U2007201900169 U CNU2007201900169 U CN U2007201900169U CN 200720190016 U CN200720190016 U CN 200720190016U CN 201126583 Y CN201126583 Y CN 201126583Y
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- circuit
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- transmitter
- radio
- frequency identification
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Abstract
The utility model relates to a radio frequency identifying field, and provides a radio frequency identification read-write device. The read-write device (10) comprises a modulating circuit (11), a transmitting and receiving circuit (12) and a demodulating circuit (13). The transmitting and receiving circuit (12) comprises a transmitter (121) and a receiver (122). The output end of the modulating circuit (11) is electrically connected to the input end of the transmitter (121) in the transmitting and receiving circuit (12). The output end of the receiver (122) in the transmitting and receiving circuit (12) is connected to the input end of the modulating circuit (13). The utility model is characterized in that the transmitter (121) or receiver (122) is detachably connected with other components of the read-write device (10). Through facilitating that at least the transmitter and the receiver is detachable connected with other components of the read-write device, and are not integrated with other components, the transmitting and receiving powers of the transmitter and the receiver can be independently configured.
Description
Technical field
The utility model relates to radio-frequency (RF) identification (RFID) field, more specifically, relates to a kind of rfid interrogator.
Background technology
The RFID technology all is widely used in a lot of fields at present as a kind of contactless automatic identification technology.This technology is by the automatic recognition objective object of radiofrequency signal and obtain related data, and its identification work need not manual intervention, the discrimination height, and speed is fast.
Existing rfid system is made up of three parts substantially: radio-frequency (RF) tag, reader and antenna.Radio-frequency (RF) tag is called electronic tag again, form by coupling element and chip, each label all has unique electronic code, and this label is attached and is used to identify destination object on object, and label can be divided into passive label (or passive label) and active tag (or active label).Reader generally is the equipment that is used for reading tag information, is divided into hand-held or fixed.Existing a kind of reader can also be used for having the function that reads and write concurrently to the label writing information, and read write line therefore is otherwise known as.Antenna is used for transmitting radiofrequency signal between label and reader.The ultimate principle of this rfid system is: after radio-frequency (RF) tag enters magnetic field, passive label receives the radiofrequency signal that reader sends, the energy that relies on the electric current of induction to obtain sends out the product information in the chip that is stored in label, and active tag is initiatively sent the signal of certain frequency.Reader receives the signal that label sends then, and information is wherein read in decoding, and the information that reads is sent in other data handling systems with data processing to be correlated with.
RFID uses that occupied frequency range or frequency are in the field of business a generally acknowledged division, can be divided into low-frequency range (30kHz-300kHz by the frequency height, typical frequency of operation has 125kHz, 133kHz), medium-high frequency section (3MHz-30MHz, typical frequency of operation has 13.56MHz), ultrahigh frequency and microwave (more than the 30MHz, typically frequency of operation has 433MHz, 902-928MHz, 2.45GHz, 5.8GHz).For the label that can wirelessly write, generally, write apart from being less than and read distance, its reason is to write the bigger energy of requirement.The integrated circuit (IC) chip of existing high frequency rfid interrogator general using special use designs, the RC500 that produces as the Philip etc., and each wherein integrated components and parts all can not be changed.But the general power of power component integrated in this class chip is less, mostly be below 1 watt, so signal transmission power is less, so can bring deficiencies such as signal energy is low, speed is slow, reading/writing distance is short, the general reading/writing distance of existing read write line is about about 5cm.And, because signal energy is lower, just can receive a return signal so send several signals sometimes, read the rate of writing and also therefore be affected.
The utility model content
The utility model utilizes the dedicated IC chip design to cause various deficiencies at existing in the existing rfid interrogator, a kind of rfid interrogator that adopts discrete device is provided, this rfid interrogator can send energy height, high-power signal, and reading/writing distance is bigger.
The rfid interrogator that the utility model provides comprises modulation circuit, transceiver circuit and demodulator circuit, described transceiver circuit comprises transmitter and receiver, the output terminal of modulation circuit is electrically connected to the input end of transmitter in the transceiver circuit, the output terminal of receiver is connected to the input end of demodulator circuit in the transceiver circuit, wherein, described transmitter or receiver are connected removably with other ingredients of this read write line.
Rfid interrogator of the prior art adopts integrated circuit (IC) chip, can not carry out separate configurations to each integration section in the chip, and the utility model is by making transmitter and receiver discrete at least, preferably make the composition components and parts discrete, and be connected removably with other ingredients of this read write line, just not integrated with other ingredient, thus can carry out separate configurations to emission, the received power of transmitter and receiver.For example can adopt high power device, thereby the rfid interrogator that makes the utility model provide can send energy height, high-power signal, so reading/writing distance is far away.General when to adopt power be device more than 1 watt, reading/writing distance can reach more than the 30cm, is existing more than six times of high frequency read write line, and when to adopt power be device more than 4 watts, reading/writing distance can reach more than 1 meter.And because the raising of signal energy, receive response easilier.The components and parts of forming this rfid interrogator in a preferred embodiment all be each other removably, non-integrated connection.
Description of drawings
Fig. 1 is the composition frame chart of rfid system that the rfid interrogator that provides according to the utility model is provided;
Fig. 2 is the composition frame chart according to the rfid interrogator of preferred implementation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further detailed.
As shown in Figure 1, the rfid interrogator 10 that the utility model provides comprises modulation circuit 11, transceiver circuit 12 and demodulator circuit 13, described transceiver circuit 12 comprises transmitter 121 and receiver 122, the output terminal of modulation circuit 11 is electrically connected to the input end of transmitter 121 in the transceiver circuit 12, the output terminal of receiver 122 is connected to the input end of demodulator circuit 13 in the transceiver circuit 12, wherein, described transmitter 121 or receiver 122 are connected removably with other ingredients of this read write line 10.
As shown in fig. 1, constitute the communication link of radio communication between described transmitter 121 and receiver 122 and the antenna 20, constitute the communication link of radio communication between antenna 20 and the radio-frequency (RF) tag 30, thereby read write line 10 can be by these communication links writing information or read information from radio-frequency (RF) tag 30 in radio-frequency (RF) tag 30.
Described " connecting removably " is meant not integrated with other ingredients, to be different from integrated circuit (IC) chip of the prior art, the utility model can be set up circuit according to the principle of work of rfid interrogator, and it is not integrated, thereby the components and parts in the read write line can be chosen removably, can select the components and parts better, more powerful than performance in the integrated circuit (IC) chip.
Specifically, modulation circuit 11, transceiver circuit 12 and the demodulator circuit 13 in the described read write line 10 can be connected each other removably.Components and parts in these circuit also can connect each other removably.
Described read write line 10 can also comprise carrier generation circuit 14, modulation signal generative circuit 15, and the output terminal of this carrier generation circuit 14 and modulation signal generative circuit 15 is connected respectively to the input end of described modulation circuit 11.Described carrier generation circuit 14 is connected each other removably with modulation signal generative circuit 15.Described carrier generation circuit 14 also can removablely each other be connected with components and parts in the modulation signal generative circuit 15.Described carrier generation circuit 14 can comprise oscillatory circuit and frequency dividing circuit, by those skilled in the art are supplied to know.Modulation signal generative circuit 15 can be by software control, with the information of determining to write.
Under the situation of above-mentioned non-integrated embodiment, can carry out separate configurations to the parameter (as power) of transmitter 121 and receiver 122.For example, can choose power greater than 1 watt transmitter 121 and receiver 122, preferred power bracket is between 1 watt to 10 watts.General when to adopt power be device more than 1 watt, reading/writing distance can reach more than the 30cm, is existing more than three times of high frequency read write line, and when to adopt power be device more than 4 watts, reading/writing distance can reach more than 1 meter.
Since the utility model at be the high frequency read write line, so the scope of the frequency of operation of described transmitter 121 and receiver 122 is 3MHz-30MHz, be typically 13.56MHz.
Each circuit in the rfid interrogator 10 that the utility model provides all is not particularly limited, can adopt the known various circuit that can realize its function of those skilled in the art, and the RFID reader that is constituted can be read and write the radio-frequency (RF) tag that all meet the ISO15693 standard.
In addition, the rfid interrogator 10 that the utility model provides can also comprise various adjunct circuits, as amplifying circuit, filtering circuit or the like, and can send this read write line 10 and the information received is carried out Code And Decode etc. by software.This all is the known technology that generally adopt this area, does not repeat them here.
Claims (9)
1. radio-frequency identification reader/writer, this read write line (10) comprises modulation circuit (11), transceiver circuit (12) and demodulator circuit (13), described transceiver circuit (12) comprises transmitter (121) and receiver (122), the output terminal of modulation circuit (11) is electrically connected to the input end of transmitter (121) in the transceiver circuit (12), the output terminal of receiver (122) is connected to the input end of demodulator circuit (13) in the transceiver circuit (12), it is characterized in that described transmitter (121) or receiver (122) are connected removably with other ingredients of this read write line (10).
2. radio-frequency identification reader/writer according to claim 1 is characterized in that, the modulation circuit (11) in the described read write line (10), transceiver circuit (12) and demodulator circuit (13) are connected each other removably.
3. radio-frequency identification reader/writer according to claim 2 is characterized in that, the components and parts in the modulation circuit (11) in the described read write line (10), transceiver circuit (12) and the demodulator circuit (13) are connected each other removably.
4. according to the described radio-frequency identification reader/writer of each claim among the claim 1-3, it is characterized in that the power of described transmitter (121) and receiver (122) is greater than 1 watt.
5. radio-frequency identification reader/writer according to claim 4 is characterized in that, the power of described transmitter (121) and receiver (122) is 1 watt-10 watts.
6. according to the described radio-frequency identification reader/writer of each claim among the claim 1-3, it is characterized in that the frequency of operation of described transmitter (121) and receiver (122) is 3MHz-30MHz.
7. radio-frequency identification reader/writer according to claim 6 is characterized in that, the frequency of operation of described transmitter (121) and receiver (122) is 13.56MHz.
8. radio-frequency identification reader/writer according to claim 1, it is characterized in that, described read write line (10) also comprises carrier generation circuit (14), modulation signal generative circuit (15), and the output terminal of this carrier generation circuit (14) and modulation signal generative circuit (15) is connected respectively to the input end of described modulation circuit (11).
9. radio-frequency identification reader/writer according to claim 8 is characterized in that, described carrier generation circuit (14) is connected each other removably with modulation signal generative circuit (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201900169U CN201126583Y (en) | 2007-11-06 | 2007-11-06 | Radio frequency recognizing reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201900169U CN201126583Y (en) | 2007-11-06 | 2007-11-06 | Radio frequency recognizing reader-writer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201126583Y true CN201126583Y (en) | 2008-10-01 |
Family
ID=40000050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201900169U Expired - Fee Related CN201126583Y (en) | 2007-11-06 | 2007-11-06 | Radio frequency recognizing reader-writer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201126583Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688846A (en) * | 2017-07-25 | 2018-02-13 | 浙江海洋大学 | Wireless identification tag processor |
-
2007
- 2007-11-06 CN CNU2007201900169U patent/CN201126583Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688846A (en) * | 2017-07-25 | 2018-02-13 | 浙江海洋大学 | Wireless identification tag processor |
| CN107688846B (en) * | 2017-07-25 | 2020-07-14 | 浙江海洋大学 | Wireless tag processor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |