CN101136061A - Hand-hold special junction service antenna unit device - Google Patents
Hand-hold special junction service antenna unit device Download PDFInfo
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- CN101136061A CN101136061A CNA2007100302995A CN200710030299A CN101136061A CN 101136061 A CN101136061 A CN 101136061A CN A2007100302995 A CNA2007100302995 A CN A2007100302995A CN 200710030299 A CN200710030299 A CN 200710030299A CN 101136061 A CN101136061 A CN 101136061A
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Abstract
The apparatus comprises: a micro processor, a memory module connected to the micro processor, a IC card read-write module, a communication module used for connecting to an upper computer, a radio network communication module used for making the far-end data exchange with a control center, a power module, and an information input and output module. Said IC card read-write module is connected to the read-write antenna of the IC card. Said apparatus also comprises a dedicated short-distance communication module connected to the micro processor, equipped with an transmitting antenna and used for communicating with an in-car electronic tag.
Description
Technical field
The present invention relates to Dedicated Short Range Communications, (DSRC) technical field, particularly a kind of hand-held antenna unit device that is used for the Dedicated Short Range Communications, mobile unit is carried out read-write operation.
Background technology
At first, we make description below to the relevant noun among the present invention:
Dedicated Short Range Communications, (Dedicated Short Range Communication, be called for short DSRC): dedicated short-range communication is the wireless communication protocol that is exclusively used in field of traffic, it can be vehicle provides unidirectional with roadside equipment or two-way mutual is communicated by letter, so that vehicle and road organically combine, simultaneously, also can be the relevant data that traffic control center provides driving vehicle.The communications band of DSRC is 5.8GHz, and this frequency range has advantage on technical standards such as anti-interference and transinformation.
Electric non-stop toll (Electronic Toll Collection, be called for short ETC): be meant and utilize mobile unit that is installed on the vehicle and the roadside equipment that is installed in trackside, message exchange is carried out in place in the needs charge in the vehicle ' process, do not finish whole charging process thereby automatically do not stop.
Trackside antenna element (RSU): be meant that being installed in charge station etc. locates, by the device of wireless microwave communication read-write electronic tag (that is: board units device) stored information.
Board units device (OBU): be meant be installed on the vehicle, store car information, in order to the equipment of marked vehicle.
Dedicated Short Range Communications, (DSRC) equipment is the front-end equipment of intelligent transportation system, and very important effect is arranged in intelligent transportation system.Dedicated Short Range Communications, (DSRC) equipment is finished automotive vehicle identification (Automatic Vehicle Identification, be called for short AVI) and driver identity identification, road network information acquisition (from the car to the road network) and information issue multinomial functions such as (from the road network to the car), electronic-purse transaction, it is the basis of information management system and command system in the related application.
The Dedicated Short Range Communications, of using in the intelligent transportation (DSRC) equipment mainly comprises: vehicle electronics label (OBU) and trackside antenna element (RSU), wherein electronic tag is installed on the mobile or fixed object that quilts such as vehicle, container identify, and stores the key message of this object; The major function of trackside antenna element is the information that electronic tag write down of gathering, and realizes the automatic identification to quilt sign object, and carries out information interaction with electronic tag by Radio Link, finishes relevant application flow with cooperation.
Because vehicle electronics label (OBU) has very strong flowability, to its issue, Card read/write operation etc. needs the more means of flexible movement formula, and trackside antenna element (RSU) belongs to a kind of hard-wired base station equipment, can't satisfy this application requirements.Therefore, hand-held RSU equipment becomes the optimal selection that addresses this problem.But, still find no based on the hand-held RSU equipment that meets Dedicated Short Range Communications, (DSRC) technical standard described in the following summary of the invention in the industry at present.
For example, the Chinese invention patent application CN 1700234A that announces on November 23rd, 2005, a kind of special-purpose microwave short-range communication method and system are disclosed, the application of Dedicated Short Range Communications, (DSRC) technology in intelligent transportation system (ITS) is provided, but the fixed equipment of wherein mentioning still belongs to a kind of hard-wired base station equipment, just previously described trackside antenna element (RSU).
In the Chinese utility model patent CN 2758872Y of Granted publication on February 15th, 2006, the hand-held charging terminal system of a kind of highway is disclosed, can be used as the charging terminal that highway moves hair fastener, Fare Collection System.Though this utility model possesses the flexible movement mode, its handheld terminal still adopts traditional IC-card non-contact read-write pattern, reads data in the IC-card by the IC-card module for reading and writing.Should only be applicable to traditional highway tolling system by hand-held charging terminal, system then can not be suitable for for electric non-stop toll (ETC), because the described hand-held charging terminal of this utility model can't be realized and the communicating by letter of board units OBU.
Chinese utility model patent CN 2935640Y in Granted publication on August 15th, 2007, a kind of electronics station booth based on Dedicated Short Range Communications, is disclosed, belong to the terminal device of Dedicated Short Range Communications, (DSRC) technology in digital bus system, though used the Dedicated Short Range Communications, unit in the central control unit of this electronics station booth, but it still belongs to a kind of hard-wired base station equipment, can't satisfy the mode that moves flexibly.
Summary of the invention
At above-mentioned practical problems, the objective of the invention is to provide in the application of intelligent transportation field a kind of antenna unit device of hand-held for Dedicated Short Range Communications, (DSRC) technology.
The technical solution adopted in the present invention: a kind of hand-hold special junction service antenna unit device, comprise microprocessor, and the memory module that is connected with microprocessor, the IC-card module for reading and writing, carry out the communication interface module of exchanges data with host computer, carry out the mutual wireless network communication module of teledata with control center, power module, MIM message input module and output module, described IC-card module for reading and writing is connected with IC-card read-write antenna, described special junction service antenna unit device comprises that also one is used for carrying out with the vehicle electronics label Dedicated Short Range Communications, module of data communication, this Dedicated Short Range Communications, module is connected with microprocessor, and is connected with the radio-frequency antenna of receiving and transmitting signal.
Above-mentioned Dedicated Short Range Communications, module comprises that Dedicated Short Range Communications, transmitting chain and Dedicated Short Range Communications, receive link, wherein: described Dedicated Short Range Communications, transmitting chain comprises with signal flow to the Dedicated Short Range Communications, data encoder, Dedicated Short Range Communications, signal modulator and the power amplifier that connect successively, described Dedicated Short Range Communications, data encoder is connected with microprocessor, and described power amplifier is connected with radio-frequency antenna through the time-division switch; Described Dedicated Short Range Communications, receives link and comprises with signal flow to the time-division switch, low noise amplifier, down conversion module, intermediate-frequency filter, Dedicated Short Range Communications, demodulator of PM signal PM, wave filter and the Dedicated Short Range Communications, data decoder that connect successively, described time-division switch is connected with radio-frequency antenna, and described Dedicated Short Range Communications, data decoder is connected with microprocessor.
The communication interface module that above-mentioned and host computer carries out exchanges data adopts ethernet module, perhaps RS232 communication module, perhaps USB communication interface, perhaps Wireless LAN module.
Above-mentioned MIM message input module is keyboard or touch screen.
It is LCD display module or mini-printer that last root is stated message output module.
Above-mentioned wireless network communication module adopts CDMA1X network or GPRS network.
The signal frequency that above-mentioned IC-card read-write antenna receives and sends is 13.56MHz.
Above-mentioned microprocessor also is connected with image processing module, and described image processing module is connected with photographing module, is used for images acquired or catches video information.
Above-mentioned microprocessor also is connected with audio-frequency module, is used to play voice or recording.
Above-mentioned described microprocessor also is connected with security module, and described security module is used for that communication data is carried out encryption and decryption and handles, and IC-card is authenticated based on 3DES, RSA key algorithm.
The present invention has following distinguishing feature:
(1) adopted multi-functional hand-held formula RSU apparatus-form,, be fit to very much portable Dedicated Short Range Communications, (DSRC) application demand for Dedicated Short Range Communications, (DSRC) technology provides a kind of brand-new mode in the application of intelligent transportation field;
(2) adopted independently special-purpose short distance (DSRC) communication module form, can realize directly and the communicating by letter of vehicle electronics label OBU, the IC-card that need not to take out in the electronic tag can carry out data read-write operation to it, and is convenient and swift, is applicable to electronic charging system without parking; And compatible national electronic charging Dedicated Short Range Communications, technical standard, also can conveniently match the CEN standards system of supporting Europe, perhaps support the DSRC module of the technical standard of the U.S., Japan, Korea S;
(3) adopted the several data communication interface to communicate by letter with host computer or control center, very easy to use and flexible.
Description of drawings
Fig. 1 is the schematic diagram of hand-hold special junction service of the present invention (DSRC) antenna unit device;
Fig. 2 is the schematic diagram of Dedicated Short Range Communications, of the present invention (DSRC) module.
Embodiment
As shown in Figure 1, hand-hold special junction service antenna unit device of the present invention comprises microprocessor 1, and the memory module 3 that is connected with microprocessor 1, Dedicated Short Range Communications, (DSRC) module 4, security module 6, IC-card module for reading and writing 7, ethernet module 9, RS232 communication module 10, USB communication interface 11, keyboard 12, mini-printer 13, LCD display module 14, wireless network communication module 15, audio-frequency module 16, WLAN (wireless local area network) WLAN module 17, image processing module 18, photographing module 19 and power module 20, wherein, described Dedicated Short Range Communications, (DSRC) module 4 also is connected with radio-frequency antenna 5, and described IC-card module for reading and writing also is connected with IC-card read-write antenna 8.
Described microprocessor 1 is high-speed high-performance single-chip microcomputer or other central processing unit, has very strong computing and processing power, and adopts built-in Linux operating system, also can support to adopt embedded OSs such as Windows CE.
Described memory module 3 is made of the non-volatile memories body, can select FLASH storage card or SD card etc.
Described Dedicated Short Range Communications, (DSRC) module 4 is finished Dedicated Short Range Communications, (DSRC) signal Processing, realizes the data interaction function.Dedicated Short Range Communications, (DSRC) module is supported the CEN standards system in national electronic charging Dedicated Short Range Communications, technical standard and Europe, as preferably, also can support the technical standard of the U.S., Japan, Korea S.
Described radio-frequency antenna 5 is a high-gain aerial, as preferably, can adopt directional antenna.Antenna can adopt micro-strip array antenna in form.Radio-frequency antenna 5 is connected with Dedicated Short Range Communications, (DSRC) module 4, constitutes Dedicated Short Range Communications, (DSRC) data interaction passage, is used to realize the direct communication of this hand-held DSRC antenna unit device and vehicle electronics label.
Described security module 6 is the safety control module based on key algorithms such as 3DES, RSA, is used for that communication data is carried out encryption and decryption and handles, and IC-card is authenticated.Its physics existence form is PSAM card, ESAM chip etc.As preferably, security module can be selected a plurality of PSAM cards or a plurality of ESAM chip, to support various need not the application or the IC-card of different issuers.
Described IC-card module for reading and writing 7 is connected to form by IC-card read-write chip and correspondent peripheral circuit, is responsible for the processing of IC-card read-write.The IC-card (comprising logic encryption card, CPU card, two interface C PU card and NFC card etc.) of standard specifications such as the various ISO of meeting 7816/14443/15693 of IC-card module for reading and writing 7 supports.
Described IC-card read-write antenna 8 is interconnected by microstrip antenna, matching capacitance to be formed, and is responsible for receiving and sending the 13.56MHz signal.IC-card read-write antenna 8 is connected with IC-card module for reading and writing 7, can realize the non-contact IC card read-write capability.
Described ethernet module 9 adopts the RJ-45 interface of standard, supports the 10M/100Mbps traffic rate.
Described RS232 communication module 10 is a standard serial interface, supports traffic rates such as 9600bps, 115200bps.
Described USB communication interface 11 meets USB1.1 or USB2.0 standard.
Described keyboard 12 is made for plastic material, and sense of touch and elastic force meet principle of human engineering.
Described printer is a mini-printer 13, can adopt different printers such as thermal printing, stylus printing.
Described LCD display module 14 is the display module of 24 true color, big effective area, band touch-screen, as preferably, also can adopt the LCD display module of different size model according to actual needs.
Described wireless network communication module 15 adopts the wireless network of mobile operator to communicate by letter with control center or administrative center, can realize long-range data interaction function, as preferably, can adopt CDMA1X network or GPRS network etc.
Described audio-frequency module 16 can be realized functions such as speech play, music, recording.
Described WLAN (wireless local area network) WLAN module 17 meets IEEE802.11a and IEEE802.11b standard, can realize wireless LAN communication.
Described image processing module 18 is made of image processing ics and software, as preferably, also can adopt the mode of pure software, realizes taking the function of control, video capture, image data acquiring, compression of images, car plate identification.
Described photographing module 19 is small size, high precision camera, can adopt plurality of specifications such as 300,000 pixels, 1,000,000 pixels.Photographing module 19 is connected with image processing module 18, finishes functions such as car plate identification, image processing.
Described power module 20 is chargeable, jumbo high-energy battery.As preferably, can select modes such as wireless charging to charge.
As shown in Figure 2, Dedicated Short Range Communications, (DSRC) module 4 comprises that Dedicated Short Range Communications, transmitting chain and Dedicated Short Range Communications, receive link, finish Dedicated Short Range Communications, (DSRC) data interaction function jointly.Wherein: the Dedicated Short Range Communications, transmitting chain is made of power amplifier 210, Dedicated Short Range Communications, (DSRC) signal modulator 211 and Dedicated Short Range Communications, (DSRC) data encoder 212, described DSRC data encoder 212 is connected with microprocessor 1, and described power amplifier 210 is connected with radio-frequency antenna 5 by time-division switch 22; Described Dedicated Short Range Communications, receives chain route time-division switch 22, low noise amplifier 23, down conversion module 24, intermediate-frequency filter 25, Dedicated Short Range Communications, (DSRC) demodulator of PM signal PM 26, wave filter 27 and Dedicated Short Range Communications, (DSRC) data decoder 28 and constitutes, described time-division switch 22 is connected with radio-frequency antenna 5, and described Dedicated Short Range Communications, data decoder 28 is connected with microprocessor 1.
The above is one of preferred forms of the present invention, but is not limited thereto.Under the prerequisite of the scope that does not surmount the definition of claims of the present invention and instructions, those skilled in the art can carry out adaptability revision to specific embodiments according to actual conditions, is not repeated at this.
Claims (10)
1. hand-hold special junction service antenna unit device, comprise microprocessor, and the memory module that is connected with microprocessor, the IC-card module for reading and writing, carry out the communication interface module of exchanges data with host computer, carry out the mutual wireless network communication module of teledata with control center, power module, MIM message input module and output module, described IC-card module for reading and writing is connected with IC-card read-write antenna, it is characterized in that, comprise that also one is used for carrying out with the vehicle electronics label Dedicated Short Range Communications, module of data communication, described Dedicated Short Range Communications, module is connected with microprocessor, and is connected with the radio-frequency antenna of receiving and transmitting signal.
2. according to the described hand-hold special junction service antenna unit device of claim 1, it is characterized in that described Dedicated Short Range Communications, module comprises that Dedicated Short Range Communications, transmitting chain and Dedicated Short Range Communications, receive link, wherein:
Described Dedicated Short Range Communications, transmitting chain comprises with signal flow to the Dedicated Short Range Communications, data encoder, Dedicated Short Range Communications, signal modulator and the power amplifier that connect successively, described Dedicated Short Range Communications, data encoder is connected with microprocessor, and described power amplifier is connected with radio-frequency antenna through the time-division switch;
Described Dedicated Short Range Communications, receives link and comprises with signal flow to the time-division switch, low noise amplifier, down conversion module, intermediate-frequency filter, Dedicated Short Range Communications, demodulator of PM signal PM, wave filter and the Dedicated Short Range Communications, data decoder that connect successively, described time-division switch is connected with radio-frequency antenna, and described Dedicated Short Range Communications, data decoder is connected with microprocessor.
3. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that the communication interface module that described and host computer carries out exchanges data adopts ethernet module, perhaps RS232 communication module, perhaps USB communication interface, perhaps Wireless LAN module.
4. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that described MIM message input module is keyboard or touch screen.
5. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that described message output module is LCD display module or mini-printer.
6. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that described wireless network communication module adopts CDMA1X network or GPRS network.
7. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that the signal frequency that described IC-card read-write antenna receives and sends is 13.56MHz.
8. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that described microprocessor also is connected with image processing module, described image processing module is connected with photographing module, is used for images acquired or catches video information.
9. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that described microprocessor also is connected with audio-frequency module, be used to play voice or recording.
10. according to claim 1 or 2 described hand-hold special junction service antenna unit devices, it is characterized in that, described microprocessor also is connected with security module, described security module is based on 3DES, RSA key algorithm, be used for that communication data is carried out encryption and decryption and handle, and IC-card is authenticated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100302995A CN101136061A (en) | 2007-09-18 | 2007-09-18 | Hand-hold special junction service antenna unit device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100302995A CN101136061A (en) | 2007-09-18 | 2007-09-18 | Hand-hold special junction service antenna unit device |
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| CN101136061A true CN101136061A (en) | 2008-03-05 |
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| CNA2007100302995A Pending CN101136061A (en) | 2007-09-18 | 2007-09-18 | Hand-hold special junction service antenna unit device |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998686A (en) * | 2009-08-13 | 2011-03-30 | 胡乐乐 | Vehicle wireless communication method and system |
| CN102043971A (en) * | 2009-10-20 | 2011-05-04 | 成都昊芯科技有限公司 | Industrial-grade anticounterfeiting encryption chip data initialization reading and writing equipment |
| CN102402860A (en) * | 2011-10-25 | 2012-04-04 | 深圳市华盈泰科技有限公司 | Handheld vehicle information management terminal |
| CN102402704A (en) * | 2011-12-22 | 2012-04-04 | 四川久远新方向智能科技有限公司 | Compound multifunctional IC card reader-writer |
| CN102426654A (en) * | 2011-10-26 | 2012-04-25 | 贵州讯腾物联网有限公司 | Radio frequency reader-writer and radio frequency reading-writing system |
| CN103164684A (en) * | 2013-03-13 | 2013-06-19 | 国家电网公司 | Handheld intelligent safety supervisor |
| CN103198661A (en) * | 2013-03-25 | 2013-07-10 | 无锡市崇安区科技创业服务中心 | Parking management system |
| CN103513228A (en) * | 2012-06-15 | 2014-01-15 | 深圳市金溢科技有限公司 | Positioning method based on DSRC technology |
| CN104240518A (en) * | 2014-10-14 | 2014-12-24 | 东莞市西奥计算机智能科技有限公司 | Vehicle monitoring system |
| CN104408567A (en) * | 2014-12-01 | 2015-03-11 | 国家电网公司 | Hand-held power operation terminal with relatively high security |
| CN105098847A (en) * | 2014-04-24 | 2015-11-25 | 深圳市金溢科技股份有限公司 | Efficient mass wireless charging device and wireless charging method |
| CN105262245A (en) * | 2015-11-11 | 2016-01-20 | 苏州博恩特智能科技有限公司 | Passive intelligent IC card capable of carrying out wireless charging and charging method thereof |
| CN105551098A (en) * | 2015-12-18 | 2016-05-04 | 北京握奇智能科技有限公司 | OBU and ETC card issuing portable device terminal and method |
| CN107100107A (en) * | 2017-01-24 | 2017-08-29 | 杜董 | A kind of safety alarm device of bridge |
| CN107991942A (en) * | 2017-12-28 | 2018-05-04 | 深圳市金溢科技股份有限公司 | Intelligent radio net RSU equipment, mobile base station, monitoring system and control method |
| CN108647538A (en) * | 2018-04-09 | 2018-10-12 | 天津中兴智联科技有限公司 | A kind of hand held readers system based on voice prompt |
| CN111784858A (en) * | 2020-07-22 | 2020-10-16 | 山东高速信息工程有限公司 | Intelligent access system and method for ETC (electronic toll Collection) handheld charging terminal |
| CN112184933A (en) * | 2020-09-30 | 2021-01-05 | 广州市埃特斯通讯设备有限公司 | ETC handset system capable of realizing voice talkback function |
| CN112233347A (en) * | 2020-10-22 | 2021-01-15 | 上海商米科技集团股份有限公司 | Charging method and electronic equipment based on RFID remote radio frequency identification vehicle |
| CN113516793A (en) * | 2020-04-09 | 2021-10-19 | 南京君度科技有限公司 | Emergency toll platform based on DSRC technology |
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2007
- 2007-09-18 CN CNA2007100302995A patent/CN101136061A/en active Pending
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998686A (en) * | 2009-08-13 | 2011-03-30 | 胡乐乐 | Vehicle wireless communication method and system |
| CN101998686B (en) * | 2009-08-13 | 2015-09-09 | 胡乐乐 | A kind of vehicle-mounted wireless communication method and system |
| CN102043971A (en) * | 2009-10-20 | 2011-05-04 | 成都昊芯科技有限公司 | Industrial-grade anticounterfeiting encryption chip data initialization reading and writing equipment |
| CN102402860A (en) * | 2011-10-25 | 2012-04-04 | 深圳市华盈泰科技有限公司 | Handheld vehicle information management terminal |
| CN102426654A (en) * | 2011-10-26 | 2012-04-25 | 贵州讯腾物联网有限公司 | Radio frequency reader-writer and radio frequency reading-writing system |
| CN102402704A (en) * | 2011-12-22 | 2012-04-04 | 四川久远新方向智能科技有限公司 | Compound multifunctional IC card reader-writer |
| CN102402704B (en) * | 2011-12-22 | 2015-06-17 | 四川久远新方向智能科技有限公司 | Compound multifunctional IC card reader-writer |
| CN103513228A (en) * | 2012-06-15 | 2014-01-15 | 深圳市金溢科技有限公司 | Positioning method based on DSRC technology |
| CN103513228B (en) * | 2012-06-15 | 2016-12-21 | 深圳市金溢科技股份有限公司 | A kind of localization method based on DSRC technology |
| CN103164684A (en) * | 2013-03-13 | 2013-06-19 | 国家电网公司 | Handheld intelligent safety supervisor |
| CN103164684B (en) * | 2013-03-13 | 2016-02-03 | 国家电网公司 | Handheld intelligent safety supervisor |
| CN103198661A (en) * | 2013-03-25 | 2013-07-10 | 无锡市崇安区科技创业服务中心 | Parking management system |
| CN105098847A (en) * | 2014-04-24 | 2015-11-25 | 深圳市金溢科技股份有限公司 | Efficient mass wireless charging device and wireless charging method |
| CN105098847B (en) * | 2014-04-24 | 2017-12-29 | 深圳市金溢科技股份有限公司 | A kind of efficiently batch wireless charging device and wireless charging method |
| CN104240518B (en) * | 2014-10-14 | 2016-03-30 | 广东西奥物联网科技股份有限公司 | A kind of vehicle monitoring system |
| CN104240518A (en) * | 2014-10-14 | 2014-12-24 | 东莞市西奥计算机智能科技有限公司 | Vehicle monitoring system |
| CN104408567A (en) * | 2014-12-01 | 2015-03-11 | 国家电网公司 | Hand-held power operation terminal with relatively high security |
| CN105262245A (en) * | 2015-11-11 | 2016-01-20 | 苏州博恩特智能科技有限公司 | Passive intelligent IC card capable of carrying out wireless charging and charging method thereof |
| CN105551098A (en) * | 2015-12-18 | 2016-05-04 | 北京握奇智能科技有限公司 | OBU and ETC card issuing portable device terminal and method |
| CN107100107A (en) * | 2017-01-24 | 2017-08-29 | 杜董 | A kind of safety alarm device of bridge |
| CN107991942A (en) * | 2017-12-28 | 2018-05-04 | 深圳市金溢科技股份有限公司 | Intelligent radio net RSU equipment, mobile base station, monitoring system and control method |
| CN108647538A (en) * | 2018-04-09 | 2018-10-12 | 天津中兴智联科技有限公司 | A kind of hand held readers system based on voice prompt |
| CN113516793A (en) * | 2020-04-09 | 2021-10-19 | 南京君度科技有限公司 | Emergency toll platform based on DSRC technology |
| CN111784858A (en) * | 2020-07-22 | 2020-10-16 | 山东高速信息工程有限公司 | Intelligent access system and method for ETC (electronic toll Collection) handheld charging terminal |
| CN112184933A (en) * | 2020-09-30 | 2021-01-05 | 广州市埃特斯通讯设备有限公司 | ETC handset system capable of realizing voice talkback function |
| CN112233347A (en) * | 2020-10-22 | 2021-01-15 | 上海商米科技集团股份有限公司 | Charging method and electronic equipment based on RFID remote radio frequency identification vehicle |
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