CN107977690B - RFID card sender - Google Patents
RFID card sender Download PDFInfo
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- CN107977690B CN107977690B CN201711453191.7A CN201711453191A CN107977690B CN 107977690 B CN107977690 B CN 107977690B CN 201711453191 A CN201711453191 A CN 201711453191A CN 107977690 B CN107977690 B CN 107977690B
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- 238000004891 communication Methods 0.000 claims abstract description 25
- 230000001629 suppression Effects 0.000 claims description 101
- 230000001052 transient effect Effects 0.000 claims description 101
- 239000003990 capacitor Substances 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
- G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
- G06K13/08—Feeding or discharging cards
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses an RFID card sender, which relates to the field of radio frequency identification, and is provided with a baseband module, a radio frequency module and an antenna, wherein the baseband module comprises: the system comprises a main control module, a power management module and a communication protection module, wherein the power management module is used for protecting interference signals in voltage output by a power supply, outputting the protected power supply to the main control module and a radio frequency module, and transmitting the protected data to the main control module.
Description
Technical Field
The invention relates to the field of radio frequency identification, in particular to an RFID card sender.
Background
The radio frequency identification (Radio Frequency Identification, RFID) technology is a non-contact automatic identification technology, and the basic working principle is that radio frequency signals emitted by a card sender are utilized to activate an electronic tag in a space coupling mode, and the electronic tag transmits data carried by the electronic tag back to the card sender in a specific mode in the same space coupling mode, so that the automatic identification of the electronic tag is realized.
Because RFID technology has advantages such as long-distance identification, batch identification, mobile identification, data encryption, etc., it has been widely used in traffic, military and civil fields. In practical application, people often need to use the RFID card sender in various complex environments, and when the RFID card sender is connected with external devices such as an upper computer or connected with a power supply, interference signals from the external devices or the power supply can cause interference to the RFID card sender.
Disclosure of Invention
The invention mainly aims to provide an RFID card sender, which aims to solve the technical problem that in the prior art, when the RFID card sender is connected with external equipment such as an upper computer or is connected with a power supply, an interference signal from the external equipment or the power supply can interfere the normal work of the RFID card sender.
To achieve the above object, the present invention provides an RFID card dispenser, comprising: the antenna comprises a baseband module, a radio frequency module and an antenna;
one end of the radio frequency module is connected with the baseband module, and the other end of the radio frequency module is connected with the antenna;
The baseband module includes: the system comprises a main control module, a power management module and a communication protection module;
One end of the power management module is connected with a power supply, and the other end of the power management module is connected with the main control module and the radio frequency module;
One end of the communication protection module is connected with the upper computer, and the other end of the communication protection module is connected with the main control module;
The power management module is used for protecting interference signals in the voltage signals output by the power supply and outputting the protected voltage signals to the main control module and the radio frequency module;
The communication protection module is used for protecting interference signals in data output by the upper computer and transmitting the protected data to the main control module;
the main control module is used for transmitting data to the radio frequency module and receiving a data signal fed back by the radio frequency module according to the data
The invention provides an RFID card sender, which is provided with a baseband module, a radio frequency module and an antenna, wherein the baseband module comprises: the system comprises a main control module, a power management module and a communication protection module, wherein the power management module is used for protecting interference signals in voltage output by a power supply, outputting the protected power supply to the main control module and a radio frequency module, and transmitting the protected data to the main control module.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings may be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an RFID card sender according to an embodiment of the present invention;
Fig. 2 is a block diagram of a baseband module of an RFID card sender according to an embodiment of the present invention;
Fig. 3 is a schematic circuit diagram of an EMI protection filter circuit of an RFID card dispenser according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a USB interface protection circuit of an RFID card sender according to an embodiment of the present invention;
Fig. 5 is a schematic circuit diagram of a network port protection circuit of an RFID card sender according to an embodiment of the present invention;
Fig. 6 is a block diagram of a baseband module of an RFID card sender according to an embodiment of the present invention;
fig. 7 is a block diagram of a radio frequency module of an RFID card sender according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention will be clearly described in conjunction with the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a block diagram of an RFID card issuer according to an embodiment of the present invention is shown.
As shown in fig. 1, the card issuer includes: a baseband module 1, a radio frequency module 2 and an antenna 2.
One end of the radio frequency module 2 is connected with the baseband module 1, and the other end is connected with the antenna 3.
The baseband module 1 includes: the main control module 11, the power management module 12 and the communication protection module.
One end of the power management module 12 is connected with a power supply, and the other end is connected with the main control module 11 and the radio frequency module 2.
One end of the communication protection module is connected with the upper computer, and the other end is connected with the main control module 11.
The power management module 12 is configured to protect an interference signal output from the power supply, and output the protected power supply to the main control module 11 and the radio frequency module 2.
The communication protection module is used for protecting interference signals in data input by the upper computer and transmitting the protected data to the main control module 11.
The main control module 11 is used for transmitting data to the radio frequency module 2 and receiving data signals fed back by the radio frequency module 2 according to the data.
Further, referring to fig. 2, fig. 2 is a block diagram of a baseband module of an RFID card sender according to an embodiment of the present invention.
As shown in fig. 2, the power management module 12 includes: a power interface 121, an electromagnetic interference (Electromagnetic Interference, EMI) protection filter circuit 122, and a voltage conversion circuit 123.
One end of the power interface 121 is connected with an external power supply, the other end is connected with one end of the EMI protection filter 122, the other end of the EMI protection filter 122 is connected with one end of the voltage conversion circuit 123, and the other end of the voltage conversion circuit 1123 is connected with the main control module 11.
Further, the power interface 121 is configured to receive an externally input power, and transmit the power to the EMI protection filter circuit 122, where the EMI protection filter circuit 122 is configured to protect and filter an interference signal in a voltage output by the power, and transmit the protected and filtered voltage to the voltage conversion circuit 123, and the voltage conversion circuit 123 is configured to convert the processed voltage into a first voltage signal and a second voltage signal, and then transmit the first voltage signal to the main control module 11, and transmit the second voltage signal to the radio frequency board interface circuit.
Further, the power interface 121 preferably employs a military grade connector with waterproof and dustproof properties to meet waterproof and dustproof grade requirements.
Further, referring to fig. 3, fig. 3 is a schematic circuit diagram of an EMI protection filter circuit of an RFID card dispenser according to an embodiment of the present invention;
As shown in fig. 3, the EMI protection filter circuit 122 includes: wiring terminals 1221, schottky diode 1222, varistor 1223, first air discharge tube 1224, first transient suppression diode 1225, second transient suppression diode 1226, third transient suppression diode 1227, fourth transient suppression diode 1228, fifth transient suppression diode 1229, sixth transient suppression diode 12210, first common mode inductance 12211, first capacitance 12212, second capacitance 12213, first differential mode inductance 12214, third capacitance 12215, self-restoring fuse 12216, and fourth capacitance 12217.
The connection terminal 1221 is respectively connected to a power source positive electrode, a power source negative electrode and a power source ground wire, the power source positive electrode is connected to the positive electrode of the schottky diode 1222, the negative electrode of the schottky diode 1222 is connected to one end of the piezoresistor 1223, and the schottky diode 1222 is used for electromagnetic protection and filtering in a circuit.
Further, the other end of the piezo-resistor 1223 is connected to the negative electrode of the power supply, the first pole of the first air discharge tube 1224 is connected to the negative electrode of the schottky diode 1222, the second pole of the first air discharge tube 1224 is connected to the ground wire, the third pole of the first air discharge tube 1224 is connected to the negative electrode of the power supply, the negative electrode of the first transient suppression diode 1225 is connected to the positive electrode of the first transient suppression diode 1226, the negative electrode of the first transient suppression diode 1226 is connected to the ground wire, the positive electrode of the third transient suppression diode 1227 is connected to the positive electrode of the fourth transient suppression diode 1228, the negative electrode of the fourth transient suppression diode 1228 is connected to the negative electrode of the power supply, the negative electrode of the fifth transient suppression diode 1229 is connected to the positive electrode of the sixth transient suppression diode 12210, the negative electrode of the sixth transient suppression diode 1225 is connected to the positive electrode of the first transient suppression diode 1226, the negative electrode of the fifth transient suppression diode 12210 is connected to the positive electrode of the first transient suppression diode 1226, the negative electrode of the fifth transient suppression diode 1229 is filtered out, and the fifth transient suppression diode 1228 is connected to the negative electrode of the fourth transient suppression diode 1228, and the fifth transient suppression diode 1228 is formed by the lightning-surge-proof circuit, and the fifth transient suppression diode 1225 is formed by the fifth transient suppression diode 1227.
Further, a first pole of the first common-mode inductor 12211 is connected to a positive electrode of the power supply, a second pole of the first common-mode inductor 12211 is connected to a negative electrode of the power supply, a second pole of the first common-mode inductor 12211 is connected to one end of the first capacitor 12212, the other end of the first capacitor 12212 is connected to a ground line, a third pole of the first common-mode inductor 12211 is connected to one end of the second capacitor 12213, the other end of the second capacitor 12213 is connected to the ground line, one end of the first differential-mode inductor 12214 is connected to the second pole of the first common-mode inductor 12211, a second pole of the first differential-mode inductor 12214 is connected to one end of the third capacitor 12215, a fourth pole of the first differential-mode inductor 12214 is connected to the third pole of the first common-mode inductor 12211, the third pole of the first differential inductor 12214 is connected to the other end of the third capacitor 12215, one end of the self-recovery fuse 12216 is connected to one end of the third capacitor 12215, the other end of the self-recovery fuse 12216 is connected to the positive output interface of the power supply, one end of the fourth capacitor 12217 is connected to the positive output interface of the power supply, the other end of the fourth capacitor 12217 is connected to the negative output interface of the power supply, and the first common inductor 12211, the first capacitor 12212, the second capacitor 12213, the first differential inductor 12214, the third capacitor 12215 and the fourth capacitor 12217 form a filter circuit for filtering interference signals in the power supply transmitted from the external power supply. The self-healing fuse 12216 is used to prevent out of rated current from occurring in the circuit.
Further, the voltage conversion circuit 123 includes: the first voltage converter is used for generating a first voltage signal, preferably 3.3V voltage, and transmitting the first voltage signal to the main control module 11 for supplying power to a power supply of the main control module 11, and the second voltage converter is used for generating a second voltage signal, preferably 5V voltage, and transmitting the second voltage signal to the radio frequency module 2.
As shown in fig. 2, the communication protection module includes: USB module 13 and ethernet port module 14.
Further, the USB module 13 includes a USB interface 131 and a USB interface protection circuit 132. The USB interface 131 is configured to perform data communication with an upper computer, and transmit the received data to the USB interface protection circuit 132, where the USB interface protection circuit 132 is configured to protect an interference signal in the data from the upper computer, and transmit the protected data to the main control module 11.
Further, the USB interface 131 preferably employs a military grade connector with waterproof and dustproof properties to meet waterproof and dustproof grade requirements.
Further, referring to fig. 4, fig. 4 is a schematic circuit diagram of a USB interface protection circuit of an RFID card issuer according to an embodiment of the present invention;
As shown in fig. 4, the USB interface protection circuit 132 includes: fourth air discharge tube 1321, eighth transient suppression diode 1322, ninth transient suppression diode 1323, tenth transient suppression diode 1324, eleventh transient suppression diode 1325, twelfth transient suppression diode 1326, thirteenth transient suppression diode 1327, and fourth common mode inductance 1328.
The second pole of the fourth air discharge tube 1321 is connected to the ground, the first pole of the fourth air discharge tube 1321 is connected to the USB negative signal line and the negative pole of the eighth transient suppression diode 13221322, the third pole of the fourth air discharge tube 1321 is connected to the USB positive signal line and the negative pole of the eleventh transient suppression diode 1325, and the fourth air discharge tube 1321 is used for filtering out the current generated by the lightning strike after the card issuer is struck by lightning.
Further, the cathode of the eighth transient suppression diode 13221322 is connected to the first pole of the fourth common mode inductor 1328 and the cathode of the thirteenth transient suppression diode 1327, the anode of the eighth transient suppression diode 13221322 is connected to the anode of the ninth transient suppression diode 1323, the cathode of the ninth transient suppression diode 1323 is connected to the cathode of the tenth transient suppression diode 1324 and the ground, the anode of the tenth transient suppression diode 1324 is connected to the anode of the eleventh transient suppression diode 1325, the cathode of the eleventh transient suppression diode 1325 is connected to the cathode of the twelfth transient suppression diode 1326 and the third pole of the fourth common mode inductor 1328, the anode of the twelfth transient suppression diode 1326 is connected to the anode of the thirteenth transient suppression diode 1327, the second pole of the fourth common mode inductor 1328 is connected to the output end of the USB negative signal line, the fourth common mode inductor 1328 is connected to the output end of the USB positive signal line, wherein the eighth transient suppression diode 13221322, the ninth transient suppression diode 1323, the tenth transient suppression diode 1324, the tenth transient suppression diode 1325 and the thirteenth common mode rejection diode 1328 are used for filtering the differential signals in the common mode filter circuit, and the differential mode filter circuit is formed by the first and the second common mode rejection diode 1328.
Further, as shown in fig. 2, the ethernet port module 14 includes a network interface 141, a network port protection circuit 142, and a network port circuit 143, where the network interface 141 is configured to perform data communication with an upper computer, and transmit received data to the network port protection circuit 142, the network port protection circuit 142 is configured to protect an interference signal in the data from the upper computer, and transmit the protected data to the network port circuit 143, and the network port circuit 143 is configured to perform level conversion on the data, and transmit the level-converted data to the main control module 11.
Further, the network interface 141 preferably employs a military grade connector with waterproof and dustproof properties to meet waterproof and dustproof grade requirements.
Further, referring to fig. 5, fig. 5 is a schematic circuit diagram of a network port protection circuit of an RFID card sender according to an embodiment of the present invention.
As shown in fig. 5, the portal protection circuit 142 includes: a second air discharge tube 1421, a third air discharge tube 1422, a first current-limiting power resistor 1423, a second current-limiting power resistor 1424, a third current-limiting power resistor 1425, a fourth current-limiting power resistor 1426, a seventh transient-suppression diode 1427, a second common-mode inductance 1428, and a third common-mode inductance 1429.
Further, a transmitting negative signal line of the ethernet port is connected to a third pole of the second air discharge tube 1421; the transmitting positive signal line of the Ethernet port is connected with the first pole of the second air discharge tube 1421, the second pole of the second air discharge tube 1421 is connected with the ground wire, and the receiving negative signal line of the Ethernet port is connected with the third pole of the third air discharge tube 1422; the receiving positive signal line of the Ethernet port is connected with the first pole of the third air discharge tube 1422, the second pole of the third air discharge tube 1422 is connected with the ground wire, one end of the first current limiting power resistor 1423 is connected with the third pole of the second air discharge tube 1421, the other end of the first current limiting power resistor 1423 is connected with the first pin of the seventh transient suppression diode 1427, one end of the second current limiting power resistor 1424 is connected with the first pole of the second air discharge tube 1421, the other end of the second current limiting power resistor 1424 is connected with the second pin of the seventh transient suppression diode 1427, one end of the third current limiting power resistor 1425 is connected with the third pole of the third air discharge tube 1422, the other end of the third current limiting power resistor 1425 is connected with the third pin of the seventh transient suppression diode 1427, one end of the fourth current limiting power resistor 1426 is connected with the first pole of the third air discharge tube 1422, the other end of the fourth current limiting power resistor 6 is connected with the fourth pin of the seventh transient suppression diode 7, and the second air discharge tube 1421, the third current limiting power resistor 1422 and the fourth current limiting power resistor 1426 are used for filtering out lightning current of the lightning circuit after the lightning is struck by the third current limiting power resistor 1424.
Further, a first pole of the second common-mode inductor 1428 is connected to an eighth pin of the seventh transient-suppression diode 1427, a third pole of the second common-mode inductor 1428 is connected to a seventh pin of the seventh transient-suppression diode 1427, a first pole of the third common-mode inductor 1429 is connected to a sixth pin of the seventh transient-suppression diode 1427, a third pole of the third common-mode inductor 1429 is connected to a fifth pin of the seventh transient-suppression diode 1427, a second pole of the second common-mode inductor 1428 is connected to an output port of an emission negative signal line of an ethernet port, a fourth pole of the second common-mode inductor 1428 is connected to an output port of an emission positive signal line of the ethernet port, a second pole of the third common-mode inductor 1429 is connected to an output port of a reception negative signal line of the ethernet port, wherein the seventh transient-suppression diode 1427 is used for filtering interference signals in the circuit, and the second common-mode inductor 1428 and the third common-mode inductor 1429 are used for filtering the two signals.
The portal circuit 143 includes: the network transformer and the ethernet transceiver are used for data level conversion of the ethernet port and data communication between the data of the ethernet port and the main control module 11.
Further, referring to fig. 6, fig. 6 is another block diagram of a baseband module of an RFID card sender according to an embodiment of the present invention.
As shown in fig. 6, the baseband module 1 further includes: indicator light interface module 15 and radio frequency board interface module 16.
The indicator light interface module 16 and the radio frequency board interface module 15 are connected with the main control module 11.
Further, the main control module 11 includes: the main control module 11 is provided with an operating system, and is used for receiving data transmitted from the USB module 13 or data transmitted from the Ethernet port module 14, determining the air interface protocol type of the current electronic tag according to the data, transmitting the data containing the air interface protocol type of the current electronic tag to the radio frequency module 2 through the radio frequency board interface module 13, and simultaneously, encrypting the data and authenticating the security module.
Specifically, the method for determining the type of the air interface protocol of the current electronic tag by the main control module 11 according to the data includes:
If the data transmitted by the USB module 13 or the ethernet port module 14 includes the air interface protocol type of the current electronic tag, the air interface protocol type of the current electronic tag is uniquely determined.
If the data transmitted by the USB module 13 or the ethernet port module 14 does not include the air interface protocol type of the current electronic tag, a control command is sent to the radio frequency module 2, test data of each air interface protocol software package is sent to the current electronic tag in a round manner through a plurality of air interface protocol software packages built in the radio frequency module 2, and if the radio frequency module 2 receives information fed back by the electronic tag, the air interface protocol type of the current electronic tag is determined.
Further, the main control module 11 is further configured to receive the data signal fed back by the radio frequency module 2 through the radio frequency board interface module 16, and send a control instruction to the indicator light interface module 15, so as to display the current state of the card sender.
Further, the indicator light interface module 15 is configured to display a current working state of the card sender according to a control instruction sent by the main control module 11, where the indicator light interface module 15 preferably includes three indicator lights and a power line, and the three indicator lights are respectively: the control state indicator lamp, the antenna 3 indicator lamp, the power indicator lamp and the power supply line, and the power supply voltage provided by the power supply line is preferably 3.3V.
Further, the radio frequency board interface module 16 is configured to receive the second voltage signal, transmit the second voltage signal to the radio frequency module 2, and simultaneously receive data sent by the main control module 11, and transmit the data to the radio frequency module 2, where a serial port communication mode of a universal asynchronous receiver-transmitter is preferably adopted for a communication mode between the main control module 11 and the radio frequency board interface module 16.
Further, the radio frequency board interface module 16 is further configured to receive the data signal fed back by the radio frequency module 2, and transmit the data signal to the main control module 11.
The radio frequency module 2 is configured to receive data, configure parameters of the radio frequency module 2, and simultaneously transmit the data to the antenna 3, receive a data signal fed back by the antenna 3, and transmit the data signal to the baseband module 1.
The antenna 3 is used for transmitting data to the electronic tag, receiving the data signal fed back by the electronic tag, and transmitting the data signal to the radio frequency module 2.
Further, referring to fig. 7, fig. 7 is a block diagram of a radio frequency module of an RFID card sender according to an embodiment of the present invention.
As shown in fig. 7, the radio frequency module 2 includes: the device comprises a transmitting module, a receiving module, a control module and a radio frequency power supply module.
The transmitting module is used for generating a first carrier signal and a second carrier signal, modulating the first carrier signal and the amplified modulated signal sent by the control module into a carrier signal with modulated information, amplifying the carrier signal with modulated information, transmitting the carrier signal with modulated information to the antenna after coupling, and transmitting the carrier signal with modulated information to the electronic tag by the antenna.
Further, the transmitting module includes: a frequency synthesizer 211, a power divider 212, a differential amplifier 213, a quadrature modulator 214, a power amplifier 215, a coupler 216, and a forward power detector 217.
The frequency synthesizer 211 is connected to the power divider 212, the frequency synthesizer 211 is configured to generate a radio frequency carrier signal and transmit the radio frequency carrier signal to the power divider 212, the power divider 212 converts the radio frequency carrier signal into a first carrier signal and a second carrier signal, and transmits the first carrier signal and the second carrier signal to the quadrature modulator 214 and the receiving module, respectively, the differential amplifier 213 receives the modulated signal transmitted by the control module, amplifies the modulated signal and transmits the amplified modulated signal to the quadrature modulator 214, the quadrature modulator 214 amplitude modulates the first carrier signal and the modulated signal into a carrier signal with modulation, and transmits the carrier signal with modulation to the power amplifier 215, the power amplifier 215 amplifies the carrier signal with modulation, and transmits the amplified carrier signal with modulation to the antenna 3 through the through-terminal of the coupler 216, and the forward power amplifier 217 is connected to the coupling terminal of the coupler 216, for detecting the signal power value of the coupled radio frequency signal.
Further, the receiving module is configured to amplify a data signal fed back by the electronic tag received by the antenna 3, where the data signal is a radio frequency signal, demodulate the amplified data signal, filter and amplify the demodulated data signal, digitally process the filtered and amplified data signal, and transmit the digitally processed data signal to the control portion.
Further, the receiving module includes: a low noise amplifier 221, a demodulator 222, a local oscillator amplifier 223, an amplification filter 224, a driver amplifier 225, and an inverse power detector 226.
The low noise amplifier 221 is connected to the coupler 216, the low noise amplifier 221 is configured to receive the data signal fed back by the antenna 3, amplify the data signal coupled by the coupler 216, transmit the data signal to the demodulator 222, demodulate the data signal with the second carrier signal amplified by the local oscillator amplifier 223 at zero intermediate frequency, and transmit the demodulated data signal to the amplifying filter 224, the amplifying filter 224 amplifies and filters the data signal, and transmit the amplified and filtered data signal to the driving amplifier 225, the driving amplifier 225 further amplifies the data signal, and outputs the data signal to the control module, and the reverse power detector 226 is connected to the coupler 216, for detecting whether the antenna 3 is connected normally.
Further, the control module is configured to receive the data transmitted by the radio frequency board interface module 16, decode the data, and perform parameter configuration on the transmitting module and the receiving module according to the type of the air interface protocol of the current electronic tag included in the data.
Further, the control module is also used for coding the data and converting the data into a modulation signal, and transmitting the modulation signal to the transmitting module for modulation.
Further, the control module is further configured to decode the data signal fed back by the receiving module, and transmit the decoded data signal to the baseband module 1 through the radio frequency board interface module 16.
Further, the control module includes: a micro control chip 231, an FPGA chip 232, and a digital-to-analog and analog-to-digital converter 233.
The micro control chip 231 is connected with the baseband module 1 and the FPGA chip 232, the micro control chip 231 is used for receiving data transmitted by the baseband module 1 and decoding the data, meanwhile, parameter configuration and data are analyzed according to the data and transmitted to the FPGA chip 232, the FPGA chip 232 is connected with the digital-to-analog and analog-digital converter 233, the frequency synthesizer 211, the forward power detector 217 and the reverse power detector 226, the FPGA chip 232 is used for adjusting relevant configuration of the digital-to-analog converter 233, the frequency synthesizer 211, the forward power detector 217 and the reverse power detector 226 according to parameter configuration, and the FPGA chip 232 is also used for encoding modulation signals to be transmitted, and transmits the encoded modulation signal to the digital-to-analog and analog-to-digital converter 233, receives the data signal fed back by the digital-to-analog and analog-to-digital converter 233, decodes the data signal, the digital-to-analog and analog-to-digital converter 233 is connected to the differential amplifier 213 and the driving amplifier 225, the digital-to-analog and analog-to-digital converter 233 is used for converting the digital type modulation signal generated by the FPGA chip 232 into the analog type modulation signal, and transmitting the modulation signal to the differential amplifier 213, and the digital-to-analog and analog-to-digital converter 233 is also used for receiving the data signal with the electronic tag fed back by the driving amplifier 225, converting the data signal from the analog type data signal to the digital signal type data signal, and transmitting the data signal to the FPGA chip 232.
Further, the micro control chip 231 and the FPGA chip 232 are internally provided with a plurality of air interface protocol software packages, the micro control chip 231 receives a control command sent from the main control module 11, and sequentially sends test data of each air interface protocol software package built in the micro control chip 231 and the FPGA chip 232 to the current electronic tag through the transmitting module, and if the receiving module receives information fed back by the current electronic tag, the air interface protocol type of the current electronic tag is determined.
Further, the radio frequency power module includes: the first low dropout regulator, the second low dropout regulator, the third low dropout regulator and the fourth low dropout regulator are all connected with the radio frequency board interface module 16, and after receiving the second voltage signal transmitted by the radio frequency board interface module 16, the second voltage signal is converted into a third voltage signal, a fourth voltage signal and a fifth voltage signal respectively, preferably, the third voltage signal is 3V voltage, the fourth voltage signal is 3V voltage, the fifth voltage signal is 3.3V voltage, the third voltage signal is transmitted to the transmitting module, the fourth voltage signal is transmitted to the receiving module, the fifth voltage signal is transmitted to the control module and the fourth low dropout regulator respectively, the fourth low dropout regulator receives the fifth voltage signal and converts the fifth voltage signal into a sixth voltage signal, preferably, the sixth voltage signal is 1.2V voltage, and meanwhile, the sixth voltage signal is transmitted to the control module.
Further, the antenna 3 is configured to transmit data with modulation information to the electronic tag, receive a data signal with electronic tag information fed back by the electronic tag, and transmit the data signal with electronic tag information to the radio frequency module 2.
Further, the card sender further comprises: a housing.
The housing includes: the antenna comprises an upper cover, a shell and a bottom cover, wherein the upper cover is of a rectangular sheet structure, the shell is of a frame structure, a horizontal partition plate is arranged in the frame, the bottom cover is of a rectangular sheet structure, the upper cover, the lower cover and the shell are buckled together, an antenna 3 is arranged between the upper cover and the horizontal partition plate in the shell, and a baseband module 1 and a radio frequency module 2 are arranged between the bottom cover and the horizontal partition plate in the shell.
In the RFID card sender provided by the embodiment of the present invention, a baseband module, a radio frequency module and an antenna are provided, where the baseband module includes: the system comprises a main control module, a power management module and a communication protection module, wherein the power management module is used for protecting interference signals in voltage output by a power supply, outputting the protected power supply to the main control module and a radio frequency module, and transmitting the protected data to the main control module.
In the embodiments provided in the present application, it should be understood that the disclosed card sender may be implemented in other manners. For example, the embodiments described above are merely illustrative, e.g., the division of modules is merely a logical function division, and there may be additional divisions of actual implementation, e.g., multiple modules may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module.
The foregoing description of an RFID card issuer according to the present invention will be presented to those skilled in the art, and it is not intended to limit the invention to the particular embodiment or application scope of the invention.
Claims (8)
1. The RFID card sender is characterized by comprising a baseband module, a radio frequency module and an antenna, wherein one end of the radio frequency module is connected with the baseband module, the other end of the radio frequency module is connected with the antenna, the baseband module comprises a main control module, a power management module and a communication protection module, one end of the power management module is connected with a power supply, the other end of the power management module is connected with the main control module and the radio frequency module, and one end of the communication protection module is connected with an upper computer and the other end of the communication protection module is connected with the main control module;
The power management module is used for protecting interference signals in the voltage signals output by the power supply and outputting the protected voltage signals to the main control module and the radio frequency module; the communication protection module is used for protecting interference signals in data output by the upper computer and transmitting the protected data to the main control module; the main control module is used for transmitting data to the radio frequency module and receiving a data signal fed back by the radio frequency module according to the data;
The power management module comprises a power interface, an EMI protection filter circuit and a voltage conversion circuit, wherein one end of the power interface is connected with the power supply, the other end of the power interface is connected with one end of the EMI protection filter circuit, the other end of the EMI protection filter circuit is connected with one end of the voltage conversion circuit, and the other end of the voltage conversion circuit is connected with the main control module; the power interface is used for receiving an externally input power supply and transmitting the power supply to the EMI protection filter circuit;
the EMI protection filter circuit is used for protecting interference signals in the voltage output by the power supply and transmitting the protected voltage to the voltage conversion circuit; the voltage conversion circuit is used for converting the voltage into a first path of voltage signal and a second path of voltage signal, then transmitting the first path of voltage signal to the main control module and transmitting the second path of voltage signal to the radio frequency board interface circuit;
The EMI protection filter circuit comprises a wiring terminal, a Schottky diode, a piezoresistor, a first air discharge tube, a first transient suppression diode, a second transient suppression diode, a third transient suppression diode, a fourth transient suppression diode, a fifth transient suppression diode, a sixth transient suppression diode, a first common mode inductor, a first capacitor, a second capacitor, a first differential mode inductor, a third capacitor, a self-recovery fuse and a fourth capacitor; the connecting terminal is respectively connected with a power supply positive electrode, a power supply negative electrode and a power supply ground wire, the power supply positive electrode is connected with the positive electrode of the Schottky diode, the negative electrode of the Schottky diode is connected with one end of the piezoresistor, the other end of the piezoresistor is connected with the power supply negative electrode, the first electrode of the first air discharge diode is connected with the negative electrode of the Schottky diode, the second electrode of the first air discharge diode is connected with the ground wire, the third electrode of the first air discharge diode is connected with the power supply negative electrode, the negative electrode of the first transient suppression diode is connected with the positive electrode of the power supply, the positive electrode of the first transient suppression diode is connected with the positive electrode of the second transient suppression diode, the negative electrode of the second transient suppression diode is connected with the ground wire, the negative electrode of the third transient suppression diode is connected with the positive electrode of the fourth transient suppression diode, the second transient suppression diode is connected with the negative electrode of the fifth transient suppression diode, the negative electrode of the fifth transient suppression diode is connected with the positive electrode of the fifth transient suppression diode is connected with the first common-mode inductor, the negative electrode of the fifth transient suppression diode is connected with the first common-mode inductor, the positive electrode of the fifth transient suppression diode is connected with the positive electrode of the fifth transient suppression diode is connected with the fifth transient suppression diode, the other end of the second capacitor is connected with the ground wire, one end of the first differential mode inductor is connected with the second pole of the first common mode inductor, the second pole of the first differential mode inductor is connected with one end of the third capacitor, the fourth pole of the first differential mode inductor is connected with the third pole of the first common mode inductor, the third pole of the first differential mode inductor is connected with the other end of the third capacitor, one end of the self-recovery fuse is connected with one end of the third capacitor, the other end of the self-recovery fuse is connected with the positive output interface of a power supply, one end of the fourth capacitor is connected with the positive output interface of the power supply, and the other end of the fourth capacitor is connected with the negative electrode of the power supply.
2. The card sender of claim 1, wherein the communication protection module comprises: a USB module and an Ethernet port module;
The USB module includes: USB interface and USB interface protection circuit;
The Ethernet port module comprises a network interface, a network port protection circuit and a network port circuit;
The USB interface is used for carrying out data communication with the upper computer and transmitting the received data to the USB interface protection circuit, and the USB interface protection circuit is used for protecting interference signals from the data and transmitting the protected data to the main control module;
The network interface is used for carrying out data communication with the upper computer and transmitting the received data to the network port protection circuit, the network port protection circuit is used for protecting interference signals in the data from the upper computer and transmitting the protected data to the network port circuit, and the network port circuit is used for carrying out level conversion on the data and transmitting the data after the level conversion to the main control module.
3. The card issuer of claim 2, wherein the USB interface protection circuit comprises: a fourth air discharge tube, an eighth transient suppression diode, a ninth transient suppression diode, a tenth transient suppression diode, an eleventh transient suppression diode, a twelfth transient suppression diode, a thirteenth transient suppression diode, and a fourth common mode inductance;
The second pole of the fourth air discharge tube is connected with the ground wire, the first pole of the fourth air discharge tube is connected with a USB negative signal wire and the negative pole of the eighth transient suppression diode, the third pole of the fourth air discharge tube is connected with a USB positive signal wire and the negative pole of the eleventh transient suppression diode, the negative pole of the eighth transient suppression diode is connected with the first pole of the fourth common mode inductor and the negative pole of the thirteenth transient suppression diode, the positive pole of the eighth transient suppression diode is connected with the positive pole of the ninth transient suppression diode, the negative pole of the ninth transient suppression diode is connected with the negative pole of the tenth transient suppression diode and the ground wire, the positive pole of the tenth transient suppression diode is connected with the positive pole of the eleventh transient suppression diode, the negative pole of the eleventh transient suppression diode is connected with the negative pole of the twelfth transient suppression diode and the fourth common mode inductor, the positive pole of the twelfth transient suppression diode is connected with the positive pole of the fourth common mode inductor, and the positive pole of the fourth transient suppression diode is connected with the positive pole of the USB signal output of the fourth common mode inductor.
4. The card issuer of claim 2, wherein the portal protection circuit comprises: the second air discharge tube, the third air discharge tube, the first current-limiting power resistor, the second current-limiting power resistor, the third current-limiting power resistor, the fourth current-limiting power resistor, the seventh transient suppression diode, the second common-mode inductor and the third common-mode inductor;
The transmitting negative signal line of the Ethernet port is connected with a third electrode of the second air discharge tube; the transmitting positive signal line of the Ethernet port is connected with the first pole of the second air discharge tube, the second pole of the second air discharge tube is connected with the ground wire, and the receiving negative signal line of the Ethernet port is connected with the third pole of the third air discharge tube; the receiving positive signal line of the Ethernet port is connected with the first pole of the third air discharge tube, the second pole of the third air discharge tube is connected with the ground wire, one end of the first current limiting power resistor is connected with the third pole of the second air discharge tube, the other end of the first current limiting power resistor is connected with the first pin of the seventh transient suppression diode, one end of the second current limiting power resistor is connected with the first pole of the second air discharge tube, the other end of the second current limiting power resistor is connected with the second pin of the seventh transient suppression diode, one end of the third current limiting power resistor is connected with the third pole of the third air discharge tube, the other end of the third current limiting power resistor is connected with the third pin of the seventh transient suppression diode, one end of the fourth current limiting power resistor is connected with the first pole of the third air discharge tube, the other end of the fourth current-limiting power resistor is connected with a fourth pin of the seventh transient suppression diode, a first pole of the second common-mode inductor is connected with an eighth pin of the seventh transient suppression diode, a third pole of the second common-mode inductor is connected with a seventh pin of the seventh transient suppression diode, a first pole of the third common-mode inductor is connected with a sixth pin of the seventh transient suppression diode, a third pole of the third common-mode inductor is connected with a fifth pin of the seventh transient suppression diode, a second pole of the second common-mode inductor is connected with an output port of an emission negative signal line of an Ethernet port, a fourth pole of the second common-mode inductor is connected with an output port of an emission positive signal line of the Ethernet port, a second pole of the third common-mode inductor is connected with an output port of a reception negative signal line of the Ethernet port, and a fourth pole of the third common mode inductor is connected with an output port of a receiving positive signal line of the Ethernet port.
5. The card sender according to any one of claims 2 to 4, wherein the baseband module further comprises: an indicator light interface module and a radio frequency board interface module;
The indicator light interface module and the radio frequency board interface module are connected with the main control module;
The main control module is used for receiving data transmitted from the USB module or the Ethernet port module by adopting the first path voltage signal as working voltage, determining the air interface protocol type of the current electronic tag according to the data, and transmitting the data containing the air interface protocol type of the current electronic tag to the radio frequency module through the radio frequency board interface module;
The main control module is also used for receiving the data signals fed back by the radio frequency module through the radio frequency board interface module, feeding the data signals back to the upper computer, and sending control instructions to the indicator light interface module for displaying the current state of the card sender;
The indicator light interface module is used for displaying the current working state of the card sender according to the control instruction sent by the main control module;
The radio frequency board interface module is used for receiving the second path of voltage signal, transmitting the second path of voltage signal to the radio frequency module, receiving data sent by the main control module and transmitting the data to the radio frequency module;
the radio frequency board interface module is also used for receiving the data signals fed back by the radio frequency module and transmitting the data signals to the main control module.
6. The card sender of claim 5, wherein said determining the type of air interface protocol of the current electronic label based on the data comprises:
If the data transmitted by the USB module or the Ethernet port module contains the air interface protocol type of the current electronic tag, the air interface protocol type of the current electronic tag is uniquely determined;
if the data transmitted by the USB module or the Ethernet port module does not contain the air interface protocol type of the current electronic tag, a control command is sent to the radio frequency module, test data of all the air interface protocol software packages are sent to the current electronic tag in a rotating way through a plurality of air interface protocol software packages arranged in the radio frequency module, and if the radio frequency module receives information fed back by the electronic tag, the air interface protocol type of the current electronic tag is determined.
7. The card sender of claim 1, wherein the radio frequency module comprises: the device comprises a transmitting module, a receiving module, a control module and a radio frequency power supply module;
The transmitting module is used for generating a first carrier signal and a second carrier signal, carrying out amplitude modulation on the first carrier signal and the amplified modulated signal sent by the control module to form a carrier signal with modulated information, amplifying the carrier signal with modulated information, transmitting the carrier signal with modulated information to the antenna after coupling, and transmitting the carrier signal with modulated information to the electronic tag by the antenna;
The receiving module is used for amplifying the data signal fed back by the electronic tag received by the antenna, demodulating the amplified data signal, filtering and amplifying the demodulated data signal, digitally processing the filtered and amplified data signal, and transmitting the digitally processed data signal to the control part;
The control module is used for receiving the data transmitted by the radio frequency board interface module, decoding the data, and carrying out parameter configuration on the transmitting module and the receiving module according to the type of an air interface protocol of the current electronic tag contained in the data;
The control module is also used for encoding the data, converting the data into the modulation signal and transmitting the modulation signal to the transmitting module for modulation;
The control module is also used for decoding the data signals fed back by the receiving module and transmitting the decoded data signals to the baseband module through the radio frequency board interface module;
The radio frequency power supply module is used for converting the second voltage signal into a plurality of voltage signals after receiving the second voltage signal transmitted by the radio frequency board interface module, and transmitting the voltage signals to the transmitting module, the receiving module and the control module;
The antenna is used for transmitting the data to the electronic tag, receiving the data signal returned by the electronic tag and transmitting the data signal to the radio frequency module.
8. The card sender of claim 1, wherein the card sender further comprises: a housing;
The housing includes: the antenna comprises an upper cover, a shell and a bottom cover, wherein the upper cover is of a rectangular sheet structure, the shell is of a frame structure, a horizontal partition plate is arranged in the frame, the bottom cover is of a rectangular sheet structure, the upper cover, the bottom cover and the shell are buckled together, the antenna is arranged between the upper cover and the horizontal partition plate in the shell, and the baseband module and the radio frequency module are arranged between the bottom cover and the horizontal partition plate in the shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711453191.7A CN107977690B (en) | 2017-12-28 | 2017-12-28 | RFID card sender |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711453191.7A CN107977690B (en) | 2017-12-28 | 2017-12-28 | RFID card sender |
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| CN107977690B true CN107977690B (en) | 2024-05-10 |
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| CN109766971A (en) * | 2019-03-29 | 2019-05-17 | 厦门浩邈科技有限公司 | A kind of gate inhibition RFID card sender |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366764B1 (en) * | 1998-05-08 | 2002-04-02 | Industrial Technology Research Institute | Wireless transmitter/receiver utilizing DSSS technology |
| CN201828937U (en) * | 2010-10-18 | 2011-05-11 | 杭州傅立叶科技有限公司 | Integrated dual-frequency card sender |
| CN103218644A (en) * | 2013-05-08 | 2013-07-24 | 岳流锋 | Carrier-wave-cancelled ultrahigh-frequency electronic tag reader |
| CN105279532A (en) * | 2015-10-14 | 2016-01-27 | 浙江工业大学义乌科学技术研究院有限公司 | Integrated dual-frequency card issuer device |
| CN208433014U (en) * | 2017-12-28 | 2019-01-25 | 深圳市航天华拓科技有限公司 | A kind of RFID card sender |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2057589B1 (en) * | 2007-06-08 | 2014-05-07 | LG Innotek Co., Ltd. | Tag device, reader device, and rfid system |
| KR101956873B1 (en) * | 2011-10-12 | 2019-06-19 | 마벨 월드 트레이드 리미티드 | Antenna interface for radio frequency identification circuit |
-
2017
- 2017-12-28 CN CN201711453191.7A patent/CN107977690B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366764B1 (en) * | 1998-05-08 | 2002-04-02 | Industrial Technology Research Institute | Wireless transmitter/receiver utilizing DSSS technology |
| CN201828937U (en) * | 2010-10-18 | 2011-05-11 | 杭州傅立叶科技有限公司 | Integrated dual-frequency card sender |
| CN103218644A (en) * | 2013-05-08 | 2013-07-24 | 岳流锋 | Carrier-wave-cancelled ultrahigh-frequency electronic tag reader |
| CN105279532A (en) * | 2015-10-14 | 2016-01-27 | 浙江工业大学义乌科学技术研究院有限公司 | Integrated dual-frequency card issuer device |
| CN208433014U (en) * | 2017-12-28 | 2019-01-25 | 深圳市航天华拓科技有限公司 | A kind of RFID card sender |
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