CN101266641A - Active electronic label gain controllable card reader - Google Patents
Active electronic label gain controllable card reader Download PDFInfo
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- CN101266641A CN101266641A CNA2007100735633A CN200710073563A CN101266641A CN 101266641 A CN101266641 A CN 101266641A CN A2007100735633 A CNA2007100735633 A CN A2007100735633A CN 200710073563 A CN200710073563 A CN 200710073563A CN 101266641 A CN101266641 A CN 101266641A
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Abstract
The invention relates to a gain controllable card reader of an active electronic tag, comprising a radio frequency antenna, a reader circuit and a microprocessor. The radio frequency antenna receives radio signals sent by the external active electronic tag, and sends the radio signals to the reader circuit to transform into digital signals and then sends the digital signals to the microprocessor to be processed. A gain control circuit is in series between the radio frequency antenna and the reader circuit. The gain control circuit comprises a low-noise amplifying circuit and a digital attenuator circuit. The low-noise amplifying circuit inputs signals from the radio frequency antenna. The digital attenuator circuit outputs the signals and is connected with the reader circuit. And the microprocessor directly controls the digital attenuator circuit. The outputing signals of the microprocessor directly determine attenuation amount of the digital attenuator circuit. A circumscribed interface of the microprocessor is connected with a control system to control and adjust the attenuation amount of the digital attenuator circuit. Gain of the card reader of the invention can control and adjust to change receiving sensitivity of the card reader, so that the card reader can read identified data of the electronic tag with different distances.
Description
Technical field
The present invention relates to the data identification technology, particularly relate to radio frequency identification (Radio FrequencyIdentification is called for short RFID) technology, especially relate to the gain controllable card reader of the active electronic label that is used for rfid system.
Background technology
Current society, the RFID technology has been widely used in a lot of industries and field, and in logistics and storage industry, the RFID technology mainly is to be used for tracking, location goods, especially container.The Card Reader circuit gain of card reader is fixed in the prior art rfid system, that is to say, the Card Reader of card reader (reception) sensitivity is constant.With regard to card reader, the signal that sends apart from its different far and near active electronic label is strong and weak different, and the signal that constant all the interior active electronic labels of this card reader setting range of card reader receiving range of the receiving sensitivity of prior art send can't be selected to differentiate; Because numerous electronic tags are arranged in the range of receiving of card reader usually, the card reader of prior art is difficult to each specific electronic tag is followed the tracks of accurately and located.
Summary of the invention
The technical problem to be solved in the present invention is to avoid above-mentioned the deficiencies in the prior art part and the gain controllable card reader that proposes a kind of active electronic label.Card reader of the present invention is done decay by the gain of reading card circuit and is regulated, promptly equaled the gain of Card Reader circuit (card reader), just regulated the receiving sensitivity of card reader, the electronic tag difference reading of data that realization is different to distance, thus may follow the tracks of, locate each electronic tag more exactly.
The present invention solve the technical problem can be by realizing by the following technical solutions:
Design, use a kind of gain controllable card reader of active electronic label, comprise radio-frequency antenna, Card Reader circuit and microprocessor, described radio-frequency antenna receives the radiofrequency signal that outside active electronic label sends, being sent to described Card Reader circuit conversion becomes digital signal to deliver to microprocessor processes again, the gain control circuit of between described radio-frequency antenna and Card Reader circuit, connecting, this gain control circuit comprises low noise amplifier circuit and digital pad circuit, described low noise amplifier circuit is from the radio-frequency antenna input signal, and described digital pad circuit output is connected with the Card Reader circuit; And described microprocessor is directly controlled digital attenuator circuit, and the output signal of microprocessor directly determines the damping capacity of digital pad circuit; The external-connected port of described microprocessor is connected with control system, by control system microprocessor is carried out different configuration settings, damping capacity with the described digital pad of regulating and controlling, promptly equal to change the gain size of described card reader, just change described card reader electronic tag around it is sent the receiving sensitivity of signal, corresponding one of each amount of gain of described Card Reader circuit is the radius distance in the center of circle with the card reader; After described damping capacity is set, the electronic labeling information that amplifier circuit in low noise receives radio-frequency antenna carries out signal and amplifies, microprocessor control figure attenuator circuit is to this signal attenuation, and the satisfactory signal of output gain is discerned for microprocessor through the Card Reader circuit conversion.
The gain controllable card reader of active electronic label of the present invention, the attenuation range of described digital pad circuit is: 0dB～31dB.
The decay of the gain of the gain controllable card reader of active electronic label of the present invention is more little, card reader is just high more to the receiving sensitivity of the signal that the electronic tag around it sends, and described card reader can received signal and to be read the distance of identification electronic tag just far away more; Vice versa.
The present invention solve the technical problem also can be by realizing by the following technical solutions:
Design, use a kind of gain controllable card reader of active electronic label, comprise radio-frequency antenna, Card Reader circuit and microprocessor, described radio-frequency antenna receives the radiofrequency signal that outside active electronic label sends, being sent to described Card Reader circuit conversion becomes digital signal to deliver to microprocessor processes again, the gain control circuit of between described radio-frequency antenna and Card Reader circuit, connecting, this gain control circuit only is a digital pad circuit, described microprocessor is directly controlled digital attenuator circuit, and the output signal of microprocessor directly determines the damping capacity of digital pad circuit; The external-connected port of described microprocessor is connected with control system, by control system microprocessor is carried out different configuration settings, with the damping capacity of the described digital pad of regulating and controlling; Promptly equal to change the gain size of described card reader, just change described card reader electronic tag around it is sent the receiving sensitivity of signal, corresponding one of each amount of gain of described Card Reader circuit is the radius distance in the center of circle with the card reader; After described damping capacity was set, microprocessor control figure attenuator circuit was to this signal attenuation, and the satisfactory signal of output gain is discerned for microprocessor through the Card Reader circuit conversion.
Compare with prior art, the technique effect of the gain controllable card reader of active electronic label of the present invention is: by regulating the damping capacity size of digital pad circuit, the gain that changes Card Reader circuit (card reader) is to change the receiving sensitivity of card reader, thereby read the recognition data of the electronic tag of different distance, to realize accurate tracking and location to the accompanying goods of electronic tag.
Description of drawings
Fig. 1 is the theory structure block diagram of the gain controllable card reader embodiment one of active electronic label of the present invention;
Fig. 2 is the circuit theory diagrams of described card reader embodiment one;
Fig. 3 is the theory structure block diagram of the gain controllable card reader embodiment two of active electronic label of the present invention;
Fig. 4 is the circuit theory diagrams of described card reader embodiment two.
Embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
Embodiment one:
The gain controllable card reader of active electronic label of the present invention, as depicted in figs. 1 and 2, comprise radio-frequency antenna 10, Card Reader circuit 20 and microprocessor 30, described radio-frequency antenna 10 receives the radiofrequency signal that outside each active electronic label sends, being sent to described Card Reader circuit 20 converts digital signal to and delivers to microprocessor 30 again and handle, the gain control circuit 50 of between described radio-frequency antenna 10 and Card Reader circuit 20, connecting, this gain control circuit 50 comprises low noise amplifier circuit 51 and digital pad circuit 52, described low noise amplifier circuit 51 is from the radio-frequency antenna input signal, and described digital pad circuit 52 outputs are connected with Card Reader circuit 20; And described microprocessor 30 is directly controlled digital attenuator circuit 52, and the output signal of microprocessor 30 directly determines the damping capacity of digital pad circuit 52; The external-connected port of described microprocessor 30 is connected with control system 60, can carry out different configuration settings to microprocessor 30 by control system 60, damping capacity with the described digital pad 52 of regulating and controlling, promptly equal to have changed the gain size of card reader, just change described card reader electronic tag around it is sent the receiving sensitivity of signal, corresponding one of each amount of gain of described card reader is the radius distance in the center of circle with the card reader; After described damping capacity is set, the electronic labeling information that amplifier circuit in low noise 51 receives radio-frequency antenna carries out signal and amplifies, 52 pairs of these signal attenuations of microprocessor 30 control figure attenuator circuits, the satisfactory signal of output gain is discerned for microprocessor 30 through 20 conversions of Card Reader circuit.
The gain controllable card reader of active electronic label of the present invention, the attenuation range of its digital pad circuit is: 0dB～31dB.
The gain reduction of the gain controllable card reader of active electronic label of the present invention is more little, the receiving sensitivity of the signal that the electronic tag around the gain control circuit reading card device sends is just high more, and described card reader can received signal and to be read the distance of identification electronic tag just far away more; Vice versa.
Embodiment two:
The gain controllable card reader of active electronic label of the present invention, as shown in Figure 3 and Figure 4, comprise radio-frequency antenna 10, Card Reader circuit 20 and microprocessor 30, described radio-frequency antenna 10 receives the radiofrequency signal that outside each active electronic label sends, being sent to described Card Reader circuit 20 converts digital signal to and delivers to microprocessor 30 again and handle, the gain control circuit of between described radio-frequency antenna 10 and Card Reader circuit 20, connecting, this gain control circuit only is a digital pad circuit 52, described microprocessor 30 is directly controlled digital attenuator circuit 52, and the output signal of microprocessor 30 directly determines the damping capacity of digital pad circuit 52; The external-connected port of described microprocessor 30 is connected with control system 60, can carry out different configuration settings to microprocessor 30 by control system 60, damping capacity with the described digital pad 52 of regulating and controlling, promptly equal to have changed the gain size of card reader, just change described card reader electronic tag around it is sent the receiving sensitivity of signal, corresponding one of each amount of gain of card reader is the radius distance in the center of circle with the card reader; After described damping capacity is set, 52 pairs of these signal attenuations of microprocessor 30 control figure attenuator circuits, the satisfactory signal of output gain is discerned for microprocessor 30 through 20 conversions of Card Reader circuit.
The gain controllable card reader of active electronic label of the present invention, the attenuation range of its digital pad circuit is: 0dB～31dB.
The gain reduction of the gain controllable card reader of active electronic label of the present invention is more little, the receiving sensitivity of the signal that the electronic tag around the gain control circuit reading card device sends is just high more, and described card reader can received signal and to be read the distance of identification electronic tag just far away more; Vice versa.
Claims (6)
1. the gain controllable card reader of an active electronic label, comprise radio-frequency antenna, Card Reader circuit and microprocessor, described radio-frequency antenna receives the radiofrequency signal that outside active electronic label sends, be sent to described Card Reader circuit conversion and become digital signal to deliver to microprocessor processes again, it is characterized in that:
The gain control circuit of between described radio-frequency antenna and Card Reader circuit, connecting, this gain control circuit comprises low noise amplifier circuit and digital pad circuit, described low noise amplifier circuit is from the radio-frequency antenna input signal, and described digital pad circuit output is connected with the Card Reader circuit; And described microprocessor is directly controlled digital attenuator circuit, and the output signal of microprocessor directly determines the damping capacity of digital pad circuit;
The external-connected port of described microprocessor is connected with control system, by control system microprocessor is carried out different configuration settings, damping capacity with the described digital pad of regulating and controlling, promptly equal to change the gain size of described card reader, just change described card reader electronic tag around it is sent the receiving sensitivity of signal, corresponding one of each amount of gain of described Card Reader circuit is the radius distance in the center of circle with the card reader; After described damping capacity is set, the electronic labeling information that amplifier circuit in low noise receives radio-frequency antenna carries out signal and amplifies, microprocessor control figure attenuator circuit is to this signal attenuation, and the satisfactory signal of output gain is discerned for microprocessor through the Card Reader circuit conversion.
2. the gain controllable card reader of active electronic label as claimed in claim 1, it is characterized in that: the attenuation range of described digital pad circuit is: 0dB～31dB.
3. the gain controllable card reader of active electronic label as claimed in claim 1 or 2, it is characterized in that: the decay of described gain is more little, card reader is just high more to the receiving sensitivity of the signal that the electronic tag around it sends, and described card reader can received signal and to be read the distance of identification electronic tag just far away more; Vice versa.
4. the gain controllable card reader of an active electronic label, comprise radio-frequency antenna, Card Reader circuit and microprocessor, described radio-frequency antenna receives the radiofrequency signal that outside active electronic label sends, be sent to described Card Reader circuit conversion and become digital signal to deliver to microprocessor processes again, it is characterized in that:
The gain control circuit of between described radio-frequency antenna and Card Reader circuit, connecting, this gain control circuit only is a digital pad circuit, described microprocessor is directly controlled digital attenuator circuit, and the output signal of microprocessor directly determines the damping capacity of digital pad circuit;
The external-connected port of described microprocessor is connected with control system, by control system microprocessor is carried out different configuration settings, with the damping capacity of the described digital pad of regulating and controlling; Promptly equal to change the gain size of described card reader, just change described card reader electronic tag around it is sent the receiving sensitivity of signal, corresponding one of each amount of gain of described Card Reader circuit is the radius distance in the center of circle with the card reader; After described damping capacity was set, microprocessor control figure attenuator circuit was to this signal attenuation, and the satisfactory signal of output gain is discerned for microprocessor through the Card Reader circuit conversion.
5. the gain controllable card reader of active electronic label as claimed in claim 1, it is characterized in that: the attenuation range of described digital pad circuit is: 0dB～31dB.
6. the gain controllable card reader of active electronic label as claimed in claim 1, it is characterized in that: the decay of described gain is more little, card reader is just high more to the receiving sensitivity of the signal that the electronic tag around it sends, and described card reader can received signal and to be read the distance of identification electronic tag just far away more; Vice versa
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100735633A CN101266641A (en) | 2007-03-17 | 2007-03-17 | Active electronic label gain controllable card reader |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100735633A CN101266641A (en) | 2007-03-17 | 2007-03-17 | Active electronic label gain controllable card reader |
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| CN101266641A true CN101266641A (en) | 2008-09-17 |
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| CNA2007100735633A Pending CN101266641A (en) | 2007-03-17 | 2007-03-17 | Active electronic label gain controllable card reader |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685567B (en) * | 2008-09-23 | 2011-05-25 | 国民技术股份有限公司 | POS machine with accurate power attenuator |
| WO2011140731A1 (en) * | 2010-05-10 | 2011-11-17 | 国民技术股份有限公司 | Device, system and method for low-frequency magnetic field signal detecting, transmission and distance estimating |
| CN102778841A (en) * | 2011-05-12 | 2012-11-14 | 深圳市润农科技有限公司 | Automatic adjusting method and device of pig herd ingestion speed |
| CN103034877A (en) * | 2012-12-03 | 2013-04-10 | 深圳市新国都技术股份有限公司 | Antenna gain method of near field communication (NFC) reader-writer |
| CN103366213A (en) * | 2012-03-31 | 2013-10-23 | 华矽半导体股份有限公司 | Active electronic label and signal modulation method thereof |
| CN103546960A (en) * | 2012-07-10 | 2014-01-29 | 中国电信股份有限公司 | Positioning method and system |
| CN103870864A (en) * | 2012-12-10 | 2014-06-18 | 首崴电子股份有限公司 | Active electronic volume label device for memory card |
| CN105021305A (en) * | 2015-07-03 | 2015-11-04 | 江苏声立传感技术有限公司 | Automatic signal intensity control method based on IoT power temperature measuring equipment |
| WO2017092704A1 (en) * | 2015-12-01 | 2017-06-08 | Zheng Shi | System and method for deriving spatial sequence of multiple objects on interactive surface |
| CN108365329A (en) * | 2018-01-23 | 2018-08-03 | 北京今日天鸿医疗器械制造有限公司 | The LF communication antenna of radiation field variation |
| CN110853201A (en) * | 2019-10-18 | 2020-02-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Vehicle access control device and method based on combination of license plate and RFID reader for identification |
-
2007
- 2007-03-17 CN CNA2007100735633A patent/CN101266641A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685567B (en) * | 2008-09-23 | 2011-05-25 | 国民技术股份有限公司 | POS machine with accurate power attenuator |
| WO2011140731A1 (en) * | 2010-05-10 | 2011-11-17 | 国民技术股份有限公司 | Device, system and method for low-frequency magnetic field signal detecting, transmission and distance estimating |
| CN103023536A (en) * | 2010-05-10 | 2013-04-03 | 国民技术股份有限公司 | Device, system and method used for detecting and transmitting low-frequency magnetic field signal and judging distance |
| CN103023536B (en) * | 2010-05-10 | 2014-12-03 | 国民技术股份有限公司 | Device, system and method used for detecting and transmitting low-frequency magnetic field signal and judging distance |
| CN102778841A (en) * | 2011-05-12 | 2012-11-14 | 深圳市润农科技有限公司 | Automatic adjusting method and device of pig herd ingestion speed |
| CN103366213B (en) * | 2012-03-31 | 2016-08-03 | 华矽半导体股份有限公司 | Active electric subtab and method for modulating signal thereof |
| CN103366213A (en) * | 2012-03-31 | 2013-10-23 | 华矽半导体股份有限公司 | Active electronic label and signal modulation method thereof |
| CN103546960A (en) * | 2012-07-10 | 2014-01-29 | 中国电信股份有限公司 | Positioning method and system |
| CN103546960B (en) * | 2012-07-10 | 2017-12-12 | 中国电信股份有限公司 | Localization method and system |
| CN103034877A (en) * | 2012-12-03 | 2013-04-10 | 深圳市新国都技术股份有限公司 | Antenna gain method of near field communication (NFC) reader-writer |
| CN103034877B (en) * | 2012-12-03 | 2015-10-28 | 深圳市新国都技术股份有限公司 | The antenna gain method of NFC read write line |
| CN103870864B (en) * | 2012-12-10 | 2016-09-28 | 首崴电子股份有限公司 | For memory card active electronic label device |
| CN103870864A (en) * | 2012-12-10 | 2014-06-18 | 首崴电子股份有限公司 | Active electronic volume label device for memory card |
| CN105021305A (en) * | 2015-07-03 | 2015-11-04 | 江苏声立传感技术有限公司 | Automatic signal intensity control method based on IoT power temperature measuring equipment |
| WO2017092704A1 (en) * | 2015-12-01 | 2017-06-08 | Zheng Shi | System and method for deriving spatial sequence of multiple objects on interactive surface |
| US10365361B2 (en) | 2015-12-01 | 2019-07-30 | Zheng Shi | System and method for deriving spatial sequence of multiple objects on an interactive surface |
| CN108365329A (en) * | 2018-01-23 | 2018-08-03 | 北京今日天鸿医疗器械制造有限公司 | The LF communication antenna of radiation field variation |
| CN110853201A (en) * | 2019-10-18 | 2020-02-28 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Vehicle access control device and method based on combination of license plate and RFID reader for identification |
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