CN103778673B - Electronic communication device, electronic tag and electronic charging system without parking - Google Patents
Electronic communication device, electronic tag and electronic charging system without parking Download PDFInfo
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- CN103778673B CN103778673B CN201310142728.3A CN201310142728A CN103778673B CN 103778673 B CN103778673 B CN 103778673B CN 201310142728 A CN201310142728 A CN 201310142728A CN 103778673 B CN103778673 B CN 103778673B
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Abstract
The invention discloses a kind of electronic communication device, electronic tag and electronic charging system without parking, electronic communication device comprise dual-mode antenna, master controller and be parallel to transmitting path between the two, the first receiving path, the second receiving path, first wake path and second up and wake path up; Two receiving paths and two wake path up and are respectively equipped with switching command receiving end, are connected with the switching command output end signal of master controller, according to the switching command that master controller exports, realize the gating that two receiving paths and two wake path up.This electronic communication device is applied to electronic tag, according to the software control of master controller, transmitting path launches the signal meeting GB or terrestrial reference, first receiving path, the second receiving path, first are waken path and second up and are waken path up and switch according to the switching command of master controller, make different receiving path and wake path up to be in signal circulation status, electronic tag just can be adapted to different ETC standard user demands.
Description
Technical field
The present invention relates to intelligent transportation or DSRC Dedicated Short Range Communications, field, be specifically related to a kind of electronic communication device, electronic tag and electronic charging system without parking.
Background technology
Here, first the relevant technical terms related in the present invention is simply introduced:
EEROM:EEROMElectronicallyErasableRead-OnlyMemory, i.e. electric erasable read only storer;
ESAM:EmbeddedSecureAccessModule, i.e. embedded safe control module;
PA:PowerAmplifier, i.e. power amplifier;
LNA:LowNoiseAmplifier, i.e. low noise amplifier;
MCU:MicroControlUnit, i.e. microprocessor or master controller;
ETC:ElectronicTollCollection, i.e. electronic charging system without parking;
LDO:LowDropoutRegulator, i.e. low pressure difference linear voltage regulator;
LED:LightEmittingDiode, i.e. light emitting diode.
In current intelligent traffic administration system field, country has put into effect ETC standard, standard No. is GB/T20851.1-2007, electronic charging Dedicated Short Range Communications, but some areas are still in the local ETC standard of use, as In Guangdong Province, standard No. is DB44_127-2003, highway in Guangdong province networking charging system.The electronic tag of each standard has much common technical characterstic, also has much different places.Further, existing market has and is suitable for national standard (hereinafter referred to as GB) and provincial standard as the RSU dual-mode antenna of Guangdong standard (hereinafter referred to as wide mark), but does not also have corresponding simultaneous adaptation GB and provincial standard as wide target electronic tag.Be provided with the vehicle of GB electronic tag once enter the area adopting terrestrial reference electronic tag to carry out electric non-stop toll transaction, electric non-stop toll transaction just can not perform; Equally, be provided with the vehicle of terrestrial reference electronic tag once enter the area adopting GB electronic tag to carry out electric non-stop toll transaction, the transaction of normal electrical non-parking charge can not perform.
Summary of the invention
In order to make electronic tag both can carry out electric non-stop toll transaction according to GB, electric non-stop toll transaction can be carried out according to terrestrial reference again, the invention provides a kind of electronic communication device, electronic tag and electronic charging system without parking.
To achieve these goals, the technical solution adopted in the present invention is: a kind of electronic communication device, comprises dual-mode antenna and master controller, also comprises: transmitting path, the first receiving path, the second receiving path, first are waken path and second up and waken path up; Described transmitting path, the first receiving path, the second receiving path, first are waken path and second up and are waken path in parallel up between described dual-mode antenna and master controller; Described first receiving path, the second receiving path, first are waken path and second up and are waken path up and be respectively equipped with switching command receiving end, be connected with the switching command output end signal of described master controller, according to the switching command that described master controller exports, realize described first receiving path, the second receiving path, first wakes the gating that path and second wakes path up up.
The present invention also provides a kind of electronic tag, comprises electronic communication device as above.
The present invention also provides a kind of electronic charging system without parking, comprises roadside unit and electronic tag, and described electronic tag uses electronic communication device as above to communicate with roadside unit.
The invention has the beneficial effects as follows: this electronic communication device adopts transmitting path to share, and the first receiving path, the second receiving path, first are waken path and second up and waken the technical scheme that path then independently arranges up.According to the switching command that master controller switching command output terminal exports, first receiving path, the second receiving path, first are waken switching command receiving end that path and second wakes channel setting up up and are carried out correspondence and switch, signal circulation status is in make different receiving path and to wake path up, different user demands is applicable to meet electronic communication device, as being applied in electronic tag when electronic communication device, transmitting path is public, first receiving path and first is waken path up and be in signal circulation status after being switched, then electronic tag is applicable to GB user demand; Second receiving path and second is waken path up and be in signal circulation status after being switched, then electronic tag is applicable to terrestrial reference as extensively marked user demand.
Accompanying drawing explanation
Fig. 1 is the electronic communication device electrical block diagram of the embodiment of the present invention one;
Fig. 2 is the electronic communication device electrical block diagram of the embodiment of the present invention two.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
Electronic communication device in the present invention, when it is applied in ETC system, with formed one be applicable to GB (standard No.: GB/T20851.1-2007) and terrestrial reference as extensively marked the electronic tag of (standard No.: GB/T20851.1-2007) simultaneously time, first receiving path of electronic communication device, the second receiving path, first are waken path and second up and are waken path up and refer to GB receiving path successively, and terrestrial reference receiving path, GB wake path up and terrestrial reference wakes path up.
Embodiment one
Please refer to Fig. 1, the present embodiment provides a kind of and has the high modulation degree of depth and electronic communication device under being simultaneously applicable to different environment for use.
The electronic communication device provided in the present embodiment comprises dual-mode antenna 101 and master controller, also comprises transmitting path, the first receiving path, the second receiving path, first wake path and second up and wake path up; Transmitting path, the first receiving path, the second receiving path, first are waken path and second up and are waken path in parallel up between dual-mode antenna 101 and master controller; First receiving path, the second receiving path, first are waken path and second up and are waken path up and be respectively equipped with switching command receiving end, be connected with the switching command output end signal of master controller, according to the switching command that master controller exports, realize the first receiving path, the second receiving path, first wakes the gating that path and second wakes path up up.
Below respectively to transmitting path, the first receiving path, the second receiving path, first wakes path up and the second circuit structure waking path up describes in detail.
Transmitting path is provided with modulation signal controlled end, be connected with the I/O modulation signal transmitting terminal signal of master controller, the modulation signal controlled end of transmitting path receives the modulation signal of the I/O modulation signal transmitting terminal transmitting of master controller, and completes in transmitting path the modulation that transmits.Transmitting path comprise radio-frequency (RF) transceiver, the tenth microwave switch 111, for regulating power regulator and first microwave switch 102 of radio-frequency (RF) transceiver emissive power; The data transmission terminal of power regulator is connected with master controller signal, and input end is connected with the output terminal of the tenth microwave switch 111, and output terminal is connected with the input end of the first microwave switch 102; The input end of the tenth microwave switch 111 is connected with the transmitting output pin of radio-frequency (RF) transceiver; The signal access pin of radio-frequency (RF) transceiver is connected with master controller signal; The output terminal of the first microwave switch 102 is connected with dual-mode antenna 101; Both tenth microwave switch 111 and the first microwave switch 102 have modulation signal controlled end, and the modulation signal of the I/O modulation signal transmitting terminal output of master controller is transmitted into the modulation signal controlled end of the tenth microwave switch 111 and the first microwave switch 102 respectively.Particularly, power regulator comprises power amplifier 112 and digital regulation resistance, and the input end of power amplifier 112 is connected with the output terminal of the tenth microwave switch 111, and output terminal is connected with the first microwave switch 102 input end; The data transmission terminal of digital regulation resistance is connected with master controller, and output terminal connects with power amplifier 112 input end.The 9th microwave switch 110 is also accessed and LC lattice network 119, LC lattice network 119 is connected with the input end of the 9th microwave switch 110 in transmitting path; The output terminal of the 9th microwave switch 110 is connected with the input end of power amplifier 112.
First receiving path comprises the second microwave switch 103 and radio-frequency (RF) transceiver, and the input end of the second microwave switch 103 is connected with dual-mode antenna 101, and output terminal receives input pin with first of radio-frequency (RF) transceiver and is connected; The signal access pin of radio-frequency (RF) transceiver is connected with master controller signal; The switching command receiving end of the second microwave switch 103 is connected with master controller switching command output end signal.
Second receiving path comprises the 3rd microwave switch 104, the 5th microwave switch 106, low noise amplifier 113, the 7th microwave switch 108, detector diode 114 and the first signal processor that connect successively; 3rd microwave switch 104 is also connected with dual-mode antenna 101; First signal processor is also connected with master controller signal; 3rd microwave switch 104, the 5th microwave switch 106 are connected with the switching command output end signal of master controller with the switching command receiving end of the 7th microwave switch 108 three.
First wakes path up comprises the 3rd microwave switch 104, the 4th microwave switch 105 and radio-frequency (RF) transceiver, and the input end of the 3rd microwave switch 104 is connected with dual-mode antenna 101, and output terminal is connected with the input end of the 4th microwave switch 105; The output terminal of the 4th microwave switch 105 and second of radio-frequency (RF) transceiver receives input pin and is connected; The signal access pin of radio-frequency (RF) transceiver is connected with master controller signal; 3rd microwave switch 104 is connected with the switching command output end signal of master controller with the switching command receiving end of both the 4th microwave switches 105.
Second wakes path up comprises the 3rd microwave switch 104, the 6th microwave switch 107, the 8th microwave switch 109, detector diode 114 and secondary signal processor, dual-mode antenna 101, the 3rd microwave switch 104, the 6th microwave switch 107, the 8th microwave switch 109, detector diode 114 are connected successively with secondary signal processor, and secondary signal processor is also connected with master controller signal; 3rd microwave switch 104, the 6th microwave switch 107 are connected with the switching command output end signal of master controller with the switching command receiving end of the 8th microwave switch 109 three.
Except above-mentioned transmitting path, the first receiving path, the second receiving path, first are waken path and second up and waken up except path, this electronic communication device also comprises power module and contactless card reading circuit.Contactless card reading circuit is connected with master controller; Power module comprises the first power supply 115, second source 116, the 3rd power supply 117 and the 4th power supply 118; First power supply 115 provides working power for master controller and radio-frequency (RF) transceiver; Second source 116 provides working power for contactless card reading circuit; 3rd power supply 117 provides working power for power amplifier 112; 4th power supply 118 provides working power for the first and second receiving paths; The I/O control end of master controller controls the Push And Release of second source 116, the 3rd power supply 117 and the 4th power supply 118.
The present embodiment is applied to electronic tag for electronic communication device and is described further.This example provides a kind of to be had the high modulation degree of depth and can be applicable to the electronic tag of GB and terrestrial reference simultaneously, being marked with here and being extensively designated as example, as also there is other provincial standards, can make electronic tag according to the same principle described in this example.
(1) GB electronic tag
Main controller controls first receiving path and first is waken path up and is in on-state, also control transmitting path and launch the radiofrequency signal meeting GB, this electronic tag normally can carry out being suitable for the ETC transaction of GB, elaborates principle of work when electronic tag meets GB duty below.
1, transmitting path
By the SPI communication port on master controller, main controller controls radio-frequency (RF) transceiver, settling signal modulation, mixing, bandpass filtering and preliminary amplification that transmit in radio-frequency (RF) transceiver, the maximum transmission power of radio-frequency (RF) transceiver can reach 2dBm, and the power adjustments that can realize from 2dBm to-20dBm, 5.8GHz power transmission signal through process such as modulation, mixing, bandpass filtering and preliminary amplifications is exported by the transmitting terminal of radio-frequency (RF) transceiver, then launches through the tenth microwave switch 111, power regulator, the first microwave switch 102 and dual-mode antenna 101.
In order to increase the emissive power of radio-frequency (RF) transceiver in transmitting path, this transmitting path is connected with power regulator, transmit and carry out amplification through power amplifier 112 and digital regulation resistance and regulate, through amplify regulate transmit and launched by the first microwave switch 102 and dual-mode antenna 101 again.Wherein, master controller carries out data communication by the data transmission terminal of digital regulation resistance and digital regulation resistance, and control figure potentiometer is with regulating power amplifier 112, and then regulates the emissive power of radio-frequency (RF) transceiver.Power amplifier output power controlled range is at 12dBm to 22dBm, and changed from 1.5V to 3.0V by the terminal voltage of digital regulation resistance control power amplifier 112 and reach the object controlling output power, certainly, digital regulation resistance also can adopt DAC to substitute.Simultaneously, generally, the driving circuit of digital regulation resistance self can realize the voltage-regulation of power amplifier 112, if when the driving circuit of digital regulation resistance self can not realize the voltage-regulation of power amplifier 112, then can adopt digital regulation resistance and drive amplifier jointly to realize.
2, the first receiving path
Electronic communication device is applied in electronic tag, first receiving path is GB receiving path, next ETC signal is received through the second microwave switch 103 by dual-mode antenna 101, receiving input pin by first of radio-frequency (RF) transceiver enters in radio-frequency (RF) transceiver, carry out LNA amplification, mixing, bandpass filtering, automatic growth control, analog to digital conversion and signal receiving within it, export the ETC signal after demodulation to master controller by radio-frequency (RF) transceiver signal access pin, process further for master controller.Here, the second microwave switch 103 is provided with switching command receiving end, and be connected with the switching command output end signal of master controller, the switching command according to master controller switches.
3, first path is waken up
Electronic communication device is applied in electronic tag, first wake up receive path be that GB wakes path up, the ETC wake-up signal of coming is received from dual-mode antenna 101 termination, through the 3rd microwave switch 104, again through 5.8GHz bandpass filter (not shown in figure 1), the assorted letter of filtering, useful signal is again through the 4th microwave switch 105, receiving input pin by second of radio-frequency (RF) transceiver enters in radio-frequency (RF) transceiver, again through its inner detection, the logical frequency discriminator of band, after detecting the envelope of 10 14KHz, export the wake-up level of " 1 ", after master controller detects effective wake-up level i.e. " 1 ", just transmitting path can be enabled, receiving path and contactless card reading circuit etc., complete ETC transaction.Here, both the 3rd microwave switch 104 and the 4th microwave switch 105 are provided with switching command receiving end, and be connected with the switching command output end signal of master controller, the switching command according to master controller switches.
(2) extensively electronic tag is marked
Main controller controls second receiving path and second is waken path up and is in on-state, also control transmitting path transmitting and meet wide target radiofrequency signal, this electronic tag normally can carry out being suitable for wide target ETC and conclude the business, and elaborates principle of work when electronic tag meets wide mark duty below.
1, transmitting path
In wide mark, transmitting path composition and working principle adds with lower part on the basis of GB transmitting path:
Due under the control of master controller, radio-frequency (RF) transceiver is just launched and is met wide target carrier only, and when the tenth microwave switch 111 and the first microwave switch 102, carrier only needs to carry out high depth modulation.In order to realize provincial standard as extensively marked the high depth modulation of electronic tag, this transmitting path is provided with modulation signal controlled end, is connected with the I/O modulation signal transmitting terminal signal of master controller.Particularly, both tenth microwave switch 111 and the first microwave switch 102 have modulation signal controlled end, and the modulation signal of the I/O modulation signal transmitting terminal output of master controller is transmitted into the modulation signal controlled end of the tenth microwave switch 111 and the first microwave switch 102 respectively.Modulation signal circulation is as follows: under the control of master controller, radio-frequency (RF) transceiver launches 5.8G pure carrier signal, first through the tenth microwave switch 111, and be added to the modulation signal controlled end V2 of the tenth microwave switch 111 from the wide target modulation signal that meets that master controller I/O modulation signal transmitting terminal exports, such 5.8GHz carrier only is after the tenth microwave switch 111, under the control of the tenth microwave switch 111, output meets wide target modulation signal, at this moment the degree of modulation of modulation signal about about 90%, again through the amplification of power amplifier 112, enter the first microwave switch 102, the wide target modulation signal that meets exported from the I/O modulation signal transmitting terminal of master controller is equally added to the modulation signal controlled end V3 of the first microwave switch 102, so again carry out the synchronous modulation with the tenth microwave switch 111, the degree of modulation of modulation signal arrives 99.5%.The signal realized after high depth modulation is launched from dual-mode antenna 101, and concrete modulation signal flow process to be shown in Fig. 1 shown in dotted line.
In order to ensure that the tenth microwave switch 111 is in good channel status, and obtain good path isolation, to make transmitting path, there is higher degree of modulation, in transmitting path, access the 9th microwave switch 110 and LC lattice network 119, LC lattice network 119 are connected with the input end of the 9th microwave switch 110; The output terminal of the 9th microwave switch 110 is connected with the input end of power amplifier 112.
2, the second receiving path
Electronic communication device is applied in electronic tag, second receiving path is terrestrial reference receiving path, what receive from dual-mode antenna 101 meets wide target ETC signal through the 3rd microwave switch 104, bandpass filter (not shown in figure 1) and the 5th microwave switch 106, enter in low noise amplifier 113 and amplify 10dB gain, envelope detection is carried out successively again through the 7th microwave switch 108 and detector diode 114, again through the low-pass filtering of the first signal processor, signal is through process such as amplification and shapings, export from the output terminal of the first signal processor and meet wide target ETC signal to master controller, solution mediation transaction processing is carried out in master controller inside.Here, the 3rd microwave switch 104, the 5th microwave switch 106 and the 7th microwave switch 108 three are provided with switching command receiving end, and be connected with the switching command output end signal of master controller, the switching command according to master controller switches.
3, second path is waken up
Electronic communication device is applied in electronic tag, second to wake path up be that low mark wakes path up, what receive from dual-mode antenna 101 termination meets wide target ETC wake-up signal successively through the 3rd microwave switch 104, 6th microwave switch 107, 8th microwave switch 109, envelope detection is carried out again through detector diode 114, again through the low-pass filtering of secondary signal processor, signal is through process such as amplification and shapings, after detecting the envelope of 10 14KHz, export the wake-up level of " 1 ", after master controller detects effective wake-up level i.e. " 1 ", just transmitting path can be enabled, receiving path and contactless card reading circuit etc., finally complete ETC transaction.Here, the 3rd microwave switch 104, the 6th microwave switch 107 and the 8th microwave switch 109 three are provided with switching command receiving end, and be connected with the switching command output end signal of master controller, the switching command according to master controller switches.
Based on above-mentioned introduction, according to the switching command that master controller exports, realize the first receiving path, second receiving path, first wakes the gating that path and second wakes path up up, namely GB receiving path is realized, terrestrial reference receiving path, GB wakes the gating that path and terrestrial reference wake path up up, ETC transaction to make electronic tag be suitable for various criterion: the vehicle being provided with this electronic tag, when entering use provincial standard as wide target area, when transmitting path is in on-state, the switching command output terminal output switching order of the master controller of electronic tag, make the 3rd microwave switch 114, 4th microwave switch 115, 5th microwave switch 116, 6th microwave switch 117, the switching command receiving end of the 7th microwave switch 118 and the 8th microwave switch 119 6 receives switching command and is in closure state, wake path up to make the second receiving path and second to connect, meanwhile, the pure carrier signal of 5.8GHz launched by master controller, the I/O modulation signal transmitting terminal of master controller launches modulation signal, the modulation signal controlled end that both tenth microwave switch 111 and the first microwave switch 102 have receives modulation signal, complete the modulation of signal in transmitting path, so, normal ETC transaction in wide mark can be completed, the vehicle of this electronic tag is installed, when using GB to complete ETC transaction, when transmitting path is in on-state, the switching command output terminal output switching order of the master controller of electronic tag, make the second microwave switch 103, the switching command receiving end of the 3rd microwave switch 114 and the 4th microwave switch 115 three receives switching command and be in closure state, wake path up to make the first receiving path and first to connect, so, normal ETC transaction in GB can be completed.
Peripheral circuit in this electronic tag mainly comprises: power module, contactless card reading circuit, display, hummer, EEROM and ESAM.
In this embodiment, master controller has extremely low power consumption, control and the soft decoding of signal as circuit logic, be mainly used in the opening and closing controlling each power supply of power module, realize pole low speed paper tape reader static power disspation, in order to meet the control to power module, structurally, master controller also add two corresponding I/O control ends on prior art basis; Master controller also for controlling the Push And Release of multiple microwave switch, and controls radio-frequency (RF) transceiver and carries out the process such as the transmitting of signal, reception and signal demodulator, and also control contactless Card Reader chip in contactless card reading circuit carries out IC Card Reader simultaneously; Master controller is connected respectively with display, hummer, EEROM and ESAM, controls the Communication Control etc. of the display of display and the auditory tone cues of hummer and EEROM and ESAM, and display adopts light-emitting diode display; Wake up in path at signal, because master controller needs to detect effective wake-up level, thus structurally, master controller also add highly sensitive wake-up signal receiving port.
Contactless card reading circuit is connected with master controller, and contactless card reading circuit selects SPI interface to carry out communication with master controller, meets ISO14443 standard, supports the typeA non-contact communication agreement under 13.56MHz frequency.Note during circuit design mating with dual-mode antenna 101, and meticulously choose inductance and electric capacity, contactless card reading circuit is debugged the card reading status of the best.
The power module of electronic tag comprises the first power supply 115, second source 116, the 3rd power supply 117 and the 4th power supply 118, these four power supplys are all LDO power supply composition, except LDO1, the switch of LDO2, LDO3 and LDO4 is controlled by master controller I/O control end, and the management of power module is completed by master controller.First power supply 115 provides working power for master controller and radio-frequency (RF) transceiver; Second source 116 provides working power for contactless card reading circuit; 3rd power supply 117 provides working power for power regulator; 4th power supply 118 provides working power for Signal reception path; The Push And Release of main controller controls second source 116, the 3rd power supply 117 and the 4th power supply 118.
The electronic communication device that this embodiment provides has following beneficial effect: adopt transmitting path to share, the first receiving path, the second receiving path, first are waken path and second up and waken the technical scheme that path then independently arranges up.According to the switching command that master controller switching command output terminal exports, first receiving path, the second receiving path, first are waken switching command receiving end that path and second wakes channel setting up up and are carried out correspondence and switch, be in signal circulation status to make different receiving path and to wake path up, thus make electronic communication device be applicable to different user demands.According to identical principle, this electronic communication device can also carry out expansion design.
The electronic communication device that this embodiment provides is applied to electronic tag then there is following beneficial effect:
(1) for provincial standard as wide mark, the mode adopting microwave switch and master controller to match in transmitting path realizes high depth modulation signal, is conducive to improving the signal to noise ratio (S/N ratio), the power utilization that transmit.Wide absolute altitude depth modulation electronic tag relatively in the past, in the present embodiment, electronic tag adopts the I/O modulation signal transmitting terminal of master controller transmitting modulation signal to replace original employing medium to vibrate and produces modulation signal, without medium vibration produce signal as modulating signal source, modulation signal is transmitted into the modulation signal controlled end of transmitting path by the I/O modulation signal transmitting terminal of master controller, realizes high modulation coefficient ASK and launch in transmitting path.Owing to eliminating medium, make electronic tag more miniaturization; Meanwhile, master controller I/O modulation signal transmitting terminal launches modulation signal, and modulating signal source is launched in relative medium vibration, avoids because dielectric stability is poor, the generation of frequency deviation serious conditions.
(2) this electronic tag adopts the mode that in microwave switch and master controller, software control combines, and solves GB and the provincial standard compatibility issue as wide both marks, makes same electronic tag can be applicable to GB and provincial standard as wide mark simultaneously.
Embodiment two
Please refer to Fig. 2, electronic communication device comprises dual-mode antenna 201, master controller, transmitting path, receiving path and wakes path up, transmitting path, receiving path and wake path in parallel up between dual-mode antenna 201 and master controller.
Transmitting path comprises radio-frequency (RF) transceiver, the 7th microwave switch 208, power amplifier 209 and the first microwave switch 202,7th microwave switch 208, power amplifier 209 are connected successively with the first microwave switch 202, the signal access pin of radio-frequency (RF) transceiver is connected with master controller signal, launch the input end that output pin is connected to the 7th microwave switch 208, the output terminal of the first microwave switch 202 is connected with dual-mode antenna 201.Transmitting path is provided with modulation signal controlled end, be connected with the I/O modulation signal transmitting terminal signal of master controller, the modulation signal controlled end of transmitting path receives the modulation signal of the I/O modulation signal transmitting terminal transmitting of master controller, and completes in transmitting path the modulation that transmits.Particularly, in transmitting path, both 7th microwave switch 208 and the first microwave switch 202 have modulation signal controlled end, and the modulation signal of the I/O modulation signal transmitting terminal output of master controller is transmitted into the modulation signal controlled end of the 7th microwave switch 208 and the first microwave switch 202 respectively.In order to ensure that the 7th microwave switch 208 is in good channel status, and obtain good path isolation, to make transmitting path, there is higher degree of modulation, the 6th microwave switch 207 is also accessed and LC lattice network 210, LC lattice network 210 is connected with the input end of the 6th microwave switch 207 in transmitting path; The output terminal of the 6th microwave switch 207 is connected with the input end of power amplifier 209.Due under the control of master controller, radio-frequency (RF) transceiver is just launched and is met wide target carrier only, and when the 7th microwave switch 208 and the first microwave switch 202, carrier only needs to carry out high depth modulation.Modulation signal circulation is as follows: under the control of master controller, radio-frequency (RF) transceiver launches 5.8G pure carrier signal, first through the 7th microwave switch 208, and be added to the modulation signal controlled end V2 of the 7th microwave switch 208 from the modulation signal that the I/O modulation signal transmitting terminal of master controller exports, such 5.8GHz carrier only is after the 7th microwave switch 208, under the control of the 7th microwave switch 208, export modulation signal, at this moment the degree of modulation of modulation signal about about 90%, again through the amplification of power amplifier 209, enter the first microwave switch 202, the modulation signal exported from the I/O modulation signal transmitting terminal of master controller is equally added to the modulation signal controlled end V3 of the first microwave switch 202, so again carry out the synchronous modulation with the 7th microwave switch 208, the degree of modulation of modulation signal arrives 99.5%.The signal realized after high depth modulation is launched from dual-mode antenna 101, and concrete modulation signal flow process to be shown in Fig. 2 shown in dotted line.
Receiving path comprises the second microwave switch 203, low noise amplifier 216, the 4th microwave switch 205, detector diode 211 and the first signal processor that connect successively; Second microwave switch 203 is also connected with dual-mode antenna 201; First signal processor is also connected with master controller signal.Signal is received after the second microwave switch 203 and bandpass filter (not shown Fig. 2) from dual-mode antenna 201, enter in low noise amplifier 113 and amplify 10dB gain, envelope detection is carried out successively again through the 4th microwave switch 205 and detector diode 211, again through the low-pass filtering of the first signal processor, signal is through process such as amplification and shapings, output signal master controller from the output terminal of the first signal processor, carry out solution reconciliation process in master controller inside.
Wake path up and comprise the 3rd microwave switch 204, the 5th microwave switch 206, detector diode 211 and secondary signal processor, 3rd microwave switch 204, the 5th microwave switch 206, detector diode 211 are connected successively with secondary signal processor, and secondary signal processor is also connected with master controller signal.The wake-up signal received from dual-mode antenna 201 termination is successively through the 3rd microwave switch 204 and the 5th microwave switch 206, envelope detection is carried out again through detector diode 211, again through the low-pass filtering of secondary signal processor, signal is through process such as amplification and shapings, after detecting the envelope of 10 14KHz, export the wake-up level of " 1 ", master controller just can enable transmitting path, receiving path and contactless card reading circuit after effective wake-up level i.e. " 1 " being detected.
Equally, this electronic communication device is except above-mentioned transmitting path, receiving path and wake up except path, also comprises power module and contactless card reading circuit, and the principle of work of the two is substantially identical with embodiment one.Contactless card reading circuit is connected with master controller, and in order to meet the control to power module, structurally, master controller also add two corresponding I/O control ends on prior art basis; Power module comprises the first power supply 212, second source 213, the 3rd power supply 214 and the 4th power supply 215; First power supply 212 provides working power for master controller and radio-frequency (RF) transceiver; Second source 213 provides working power for contactless card reading circuit; 3rd power supply 214 provides working power for power amplifier 209; 4th power supply 215 provides working power for receiving path; The I/O control end of master controller controls the Push And Release of second source 213, the 3rd power supply 214 and the 4th power supply 215.
Provincial standard is applicable to as wide target electronic tag in prior art, although possessed the feature that depth of modulation is large, but meanwhile, 5.8GHz signal is produced as transmiting signal source because it adopts medium to vibrate, also bring otherwise problem: (1) due to the medium volume of this electronic tag comparatively large, the little slimming of product can not be realized; (2) medium frequency stability is poor, and frequency deviation is serious, and need adjustment to correct frequency during production, debug difficulties, difference variation is bad control also.These all have a strong impact on consistance, stability when electronic tag uses above, are also unfavorable for large-scale production.Given this, a kind of high depth modulation electronic communication device that the present embodiment can be provided is applied to and meets terrestrial reference as wide target electronic tag, and this electronic tag can complete the ETC transaction under normal wide mark.The electronic communication device that this embodiment provides is applied to coincidently target electronic tag and then there is following beneficial effect: adopt master controller I/O modulation signal transmitting terminal to launch modulation signal and replace the vibration of original employing medium to produce modulation signal, without medium vibration produce signal as modulating signal source, modulation signal is transmitted into the modulation signal controlled end of transmitting path by master controller I/O modulation signal transmitting terminal, realizes high modulation coefficient ASK and launch in transmitting path.Owing to eliminating medium, make electronic tag more miniaturization; Meanwhile, master controller I/O modulation signal transmitting terminal launches modulation signal, and modulating signal source is launched in relative medium vibration, avoids because dielectric stability is poor, the generation of frequency deviation serious conditions.
Embodiment three
The present embodiment provides a kind of electronic charging system without parking, comprises roadside unit and electronic tag, and electronic tag uses the electronic communication device as described in embodiment one or embodiment two to communicate with roadside unit.When electronic tag uses the electronic communication device of embodiment one to intercom mutually with roadside unit, making this vehicle can complete normal GB ETC and conclude the business, also completing normal provincial standard as extensively marked ETC transaction; When install embodiment two have compared with high depth modulation electronic tag on the windshield of vehicle, the intercommunication of roadside unit and electronic tag, make this vehicle complete normal provincial standard as extensively mark ETC conclude the business.
Also it should be noted that, electronic communication device described in the present invention not only can apply in electronic tag, to complete the ETC transaction meeting various criterion, can also be used on the electronic communication equipments such as car-mounted terminal, front dress electronic tag (front dress OBU), roadside unit (RSU), thus make these products all can be applicable to different standards, there is good compatibility.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made.
Claims (12)
1. an electronic communication device, comprises dual-mode antenna (101) and master controller, also comprises:
Transmitting path, the first receiving path, the second receiving path, first are waken path and second up and are waken path up;
Described transmitting path, the first receiving path, the second receiving path, first are waken path and second up and are waken path in parallel up between described dual-mode antenna (101) and master controller;
Described first receiving path, the second receiving path, first are waken path and second up and are waken path up and be respectively equipped with switching command receiving end, be connected with the switching command output end signal of described master controller, according to the switching command that described master controller exports, realize described first receiving path, the second receiving path, first wakes the gating that path and second wakes path up up;
Described first receiving path comprises the second microwave switch (103) and radio-frequency (RF) transceiver, the input end of described second microwave switch (103) is connected with described dual-mode antenna (101), and output terminal receives input pin with first of described radio-frequency (RF) transceiver and is connected; Described radio-frequency (RF) transceiver signal access pin is connected with described master controller signal; The switching command receiving end of described second microwave switch (103) is connected with master controller switching command output end signal.
2. electronic communication device as claimed in claim 1, it is characterized in that, described transmitting path is provided with modulation signal controlled end, be connected with the I/O modulation signal transmitting terminal signal of described master controller, the modulation signal controlled end of described transmitting path receives the modulation signal of described I/O modulation signal transmitting terminal transmitting, and completes in described transmitting path the modulation that transmits.
3. electronic communication device as claimed in claim 2, it is characterized in that, described transmitting path comprise radio-frequency (RF) transceiver, the tenth microwave switch (111), for regulating power regulator and first microwave switch (102) of described radio-frequency (RF) transceiver emissive power; The data transmission terminal of described power regulator is connected with described master controller signal, and input end is connected with the output terminal of described tenth microwave switch (111), and output terminal is connected with the input end of described first microwave switch (102); The input end of described tenth microwave switch (111) is connected with the transmitting output pin of described radio-frequency (RF) transceiver; The signal access pin of described radio-frequency (RF) transceiver is connected with described master controller signal; The output terminal of described first microwave switch (102) is connected with described dual-mode antenna (101); Both described tenth microwave switch (111) and the first microwave switch (102) have modulation signal controlled end, and the modulation signal of the I/O modulation signal transmitting terminal output of described master controller is transmitted into the modulation signal controlled end of the tenth microwave switch (111) and the first microwave switch (102) respectively.
4. electronic communication device as claimed in claim 3, it is characterized in that, described power regulator comprises power amplifier (112) and digital regulation resistance, the input end of described power amplifier (112) is connected with the output terminal of described tenth microwave switch (111), and output terminal is connected with the first microwave switch (102) input end; The data transmission terminal of described digital regulation resistance is connected with described master controller, and output terminal connects with described power amplifier (112) input end.
5. electronic communication device as claimed in claim 4, it is characterized in that, described transmitting path also comprises the 9th microwave switch (110) and LC lattice network (119), and described LC lattice network (119) is connected with the input end of described 9th microwave switch (110); The output terminal of described 9th microwave switch (110) is connected with the input end of described power amplifier (112).
6. as the electronic communication device as described in arbitrary in claim 1-5, it is characterized in that, described first receiving path, the second receiving path, first are waken path and second up and are waken that path is followed successively by GB receiving path, terrestrial reference receiving path, GB wakes path up and terrestrial reference wakes path up up.
7. as the electronic communication device as described in arbitrary in claim 1-5, it is characterized in that, described second receiving path comprises the 3rd microwave switch (104), the 5th microwave switch (106), low noise amplifier (113), the 7th microwave switch (108), detector diode (114) and the first signal processor that connect successively; Described 3rd microwave switch (104) is also connected with described dual-mode antenna (101); Described first signal processor is also connected with described master controller signal; Described 3rd microwave switch (104), the 5th microwave switch (106) are connected with master controller switching command output end signal with the switching command receiving end of the 7th microwave switch (108) three.
8. as the electronic communication device as described in arbitrary in claim 1-5, it is characterized in that, described first wakes path up comprises the 3rd microwave switch (104), the 4th microwave switch (105) and radio-frequency (RF) transceiver, the input end of described 3rd microwave switch (104) is connected with described dual-mode antenna (101), and output terminal is connected with the input end of described 4th microwave switch (105); The output terminal of described 4th microwave switch (105) receives input pin with second of described radio-frequency (RF) transceiver and is connected; Described radio-frequency (RF) transceiver signal access pin is connected with described master controller signal; The two switching command receiving end of described 3rd microwave switch (104) and the 4th microwave switch (105) is connected with master controller switching command output end signal.
9. as the electronic communication device as described in arbitrary in claim 1-5, it is characterized in that, described second wakes path up comprises the 3rd microwave switch (104), 6th microwave switch (107), 8th microwave switch (109), detector diode (114) and secondary signal processor, described dual-mode antenna (101), 3rd microwave switch (104), 6th microwave switch (107), 8th microwave switch (109), detector diode (114) is connected successively with secondary signal processor, described secondary signal processor is also connected with described master controller signal, described 3rd microwave switch (104), the 6th microwave switch (107) are connected with master controller switching command output end signal with the switching command receiving end of the 8th microwave switch (109) three.
10. the electronic communication device as described in claim 4 or 5, is characterized in that, also comprises power module and contactless card reading circuit; Described contactless card reading circuit is connected with described master controller; Described power module comprises the first power supply (115), second source (116), the 3rd power supply (117) and the 4th power supply (118); Described first power supply (115) provides working power for described master controller and radio-frequency (RF) transceiver; Described second source (116) provides working power for described contactless card reading circuit; Described 3rd power supply (117) provides working power for described power amplifier (112); Described 4th power supply (118) provides working power for described first receiving path and the second receiving path; The I/O control end of described master controller controls the Push And Release of described second source (116), the 3rd power supply (117) and the 4th power supply (118).
11. 1 kinds of electronic tags, is characterized in that, comprise the electronic communication device as described in claim 1-10.
12. 1 kinds of electronic charging system without parking, comprise roadside unit, it is characterized in that, also comprise electronic tag as claimed in claim 11, communicate with described roadside unit, to carry out electric non-stop toll transaction.
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| CN201310142728.3A CN103778673B (en) | 2013-04-23 | 2013-04-23 | Electronic communication device, electronic tag and electronic charging system without parking |
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| CN201310142728.3A CN103778673B (en) | 2013-04-23 | 2013-04-23 | Electronic communication device, electronic tag and electronic charging system without parking |
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Families Citing this family (7)
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| CN104766378A (en) * | 2015-02-11 | 2015-07-08 | 四川蜀路通机电设备安装有限公司 | Self-gain control second-order filter ETC sensing system |
| CN104766381A (en) * | 2015-02-11 | 2015-07-08 | 四川蜀路通机电设备安装有限公司 | ETC sensing system based on second-order filter circuit |
| CN104766380A (en) * | 2015-02-11 | 2015-07-08 | 四川蜀路通机电设备安装有限公司 | Sensing system for ETC |
| CN104766376A (en) * | 2015-02-11 | 2015-07-08 | 四川蜀路通机电设备安装有限公司 | Novel frequency conversion identification system for ETC |
| CN107219396A (en) * | 2016-03-22 | 2017-09-29 | 北京万集科技股份有限公司 | The carrier frequency measuring method and device of DSRC mobile units |
| CN112562104A (en) * | 2020-11-26 | 2021-03-26 | 东南大学 | Programmable self-adaptive single-chip vehicle-mounted unit |
| CN116112042A (en) * | 2023-02-08 | 2023-05-12 | 上海坤锐电子科技有限公司 | Demodulation circuit, electronic tag and electronic tag system |
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