CN103258354A - Vehicle-mounted device for expressway non-stop electronic toll collection system - Google Patents
Vehicle-mounted device for expressway non-stop electronic toll collection system Download PDFInfo
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Abstract
The invention discloses a vehicle-mounted device for an expressway non-stop electronic toll collection system. The vehicle-mounted device for the expressway non-stop electronic toll collection system comprises an MCU, a DSRC microwave communication unit, a high-frequency card reading unit, an ESAM encryption module, an IC card inserting trigger module, a human-computer interface module, a USB interface module and a power management module, wherein the DSRC microwave communication unit, the high-frequency card reading unit, the ESAM encryption module, the IC card inserting trigger module, the human-computer interface module, the USB interface module and the power management module are respectively connected with the MCU. The vehicle-mounted device for the expressway non-stop electronic toll collection system can overcome the shortcomings that the structure is complicated, the functions are few and the cost performance is low in the prior art and has the advantages of being simple in structure, multiple in function and high in cost performance.
Description
Technical field
The present invention relates to the intelligent transport technology field, particularly, relate to a kind of highway toll collection system car-mounted device.
Background technology
Electronic charging system without parking (Electronic Toll Collection, be called for short ETC), refer to that vehicle is by charge station the time, realizing that vehicle identification, information write (entrance) and automatically from IC-card or bank account deduction corresponding fund (outlet) of binding in advance by mobile unit, is to make great efforts a kind of E-payment system for road, bridge and tunnel of developing and popularizing in the world.
The ETC dedicated Lanes are to use to those vehicles of having adorned the ETC vehicle carried device, adopt the electronic charging mode.Electronic charging system without parking is state-of-the-art toll on the road and bridge's mode in the world at present.By being installed in vehicle electronics label and the special-purpose short distance communication of the microwave between the microwave antenna on the ETC of the charge station dedicated Lanes on the vehicle windscreen, utilize Computer Networking and bank to carry out the backstage settlement process, thereby reach that vehicle need not stop by the toll on the road and bridge station and the purpose that can pay road and bridge expenses.
China's highway tolling system is along with expressway construction has also had very big development.During the last ten years, highway tolling system is progressively carried out the transition to independent development and is introduced the stage that combines by comprehensive introduction stage.Be mainly reflected in by the area networking charge, by the circuit networked fee collection, adopt high-and-new science and technology to improve three aspects of toll administration means.Progressively formation along with Trans-Provincial/Municipal trunk lines of national expressways highway network, society will be more and more higher to the technical requirement of Fare Collection System, the higher toll collection technique of automaticity must progressively replace traditional manual work mode, and the ETC technology can obtain adopting in suitable highway section.The traffic capacity of a lot of freeway toll stations can not satisfy the needs of rush-hour, and two selections are arranged at present: the one, and enlarging charge station, the 2nd, reconstruction ETC track.Obviously be better than enlarging charge station and implement the ETC track.
The round magnitude of traffic flow is very big between the city in a lot of cities of China, traffic flow density is very high, and this just requires the road service level also will satisfy the demands, and the demand of the ETC charge of implementing not stop, vehicle passes through at a high speed is outwardness, is mathematical.Can compatible IC-card charge and the two-piece type electronic tag of ETC electronic charging and exploration and the focus that combined electronic toll collection technique scheme will become the development of network of highways robotization toll collection technique thereof.
In realizing process of the present invention, defective such as the inventor finds there is complex structure in the prior art at least, function is few and cost performance is low.
Summary of the invention
The objective of the invention is to, at the problems referred to above, propose a kind of highway toll collection system car-mounted device, the many and high advantage of cost performance of, function simple with implementation structure.
For achieving the above object, the technical solution used in the present invention is: a kind of highway toll collection system car-mounted device, comprise the MCU control module, and the DSRC microwave communication unit that is connected with described MCU control module respectively, high frequency card reading unit, ESAM encrypting module, IC-card plug-in card trigger module, human-computer interface module, usb interface module and power management module; Wherein:
Described MCU control module, for the generation of the transmitting-receiving control signal of finishing described DSRC microwave communication unit, parsing and coding, the conversion of mode of operation and the realization of DSRC agreement of receiving and transmitting signal, be used for the information interaction of high frequency card reading unit and with the exchanges data of ESAM encrypting module, and be used for to described human-computer interface module driving, to the control of usb interface module and power management module.
Further, above-described highway toll collection system car-mounted device comprises that also the tamper that is connected with described MCU control module unloads module; The interruptive port that module and MCU control module are unloaded in described tamper is connected, and whether the IO that the external signal that is used for sensing is passed through the MCU control module produces external interrupt, illegally dismantled with monitoring.
Further, module is unloaded in described tamper, comprises the microswitch that is connected with the MCU control module; Described microswitch is used for realizing the anti-disassembling function of OBU as external interface.
Further, above-described highway toll collection system car-mounted device also comprises the JTAG debugging interface that is connected with described MCU control module.
Further, described JTAG debugging interface comprises 6 line standard jtag interfaces; The TCK pin of described 6 line standard jtag interfaces, TMS pin, TDO pin, TDI pin, RST pin and GND pin are connected with the MCU control module respectively.
Further, little process chip of described MCU control module comprises 16 low-power consumption microcontroller MSP430F5418A; And/or,
Described DSRC microwave communication unit comprises microwave radio transceiving chip BK5822; And/or,
The card reader chip of described high frequency card reading unit comprises card reader chip RC522; And/or,
Described ESAM encrypting module comprises the ESAM application module of holding the exploitation of strange company; And/or,
Described IC-card plug-in card trigger module comprises and can finish the identification of the contact of two interface C PU cards part, can finish the IC-card draw-in groove that card is inserted status detection again; And/or,
Described human-computer interface module comprises 128*64 dot matrix drawing type LCD MODULE; And/or,
Described usb interface module comprises conversion chip CP2102, and described conversion chip CP2102 is used for realizing that USB changes the function of serial ports.
Further, described power management module, comprise high light type solar recharging module, rechargeable type lithium ion battery and circumscribed charger, and the voltage transformation module that is connected with the circumscribed charger with high light type solar recharging module, rechargeable type lithium ion battery respectively.
Further; described voltage transformation module; comprise the linear voltage regulator MIC3775 that is connected with human-computer interface module; the voltage transitions chip that is connected with other consumers, and the overcurrent that is connected with the voltage transitions chip with described linear voltage regulator MIC3775 respectively, excess temperature, under-voltage, overcharge, short-circuit protection module and electric weight cross low alarm module.
The highway toll collection system car-mounted device of various embodiments of the present invention, owing to comprise the MCU control module, and the DSRC microwave communication unit that is connected with the MCU control module respectively, high frequency card reading unit, ESAM encrypting module, IC-card plug-in card trigger module, human-computer interface module, usb interface module and power management module; Can be applied to highway toll collection system, can be according to national standard, for the user provides a cover application demand quite complete, high performance-price ratio; Thereby can overcome complex structure in the prior art, function is few and cost performance is low defective, simple with implementation structure, function many and the high advantage of cost performance.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the present invention.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 a, Fig. 1 b are the principle of work synoptic diagram of highway toll collection system of the present invention with car-mounted device;
Fig. 2 a-Fig. 2 h for highway toll collection system of the present invention with MCU control module in the car-mounted device (Fig. 2 g and Fig. 2 h), miniUSB interface module (Fig. 2 c), tamper unload module (Fig. 2 a), the electrical principle synoptic diagram of IC-card plug-in card trigger module (Fig. 2 f), JTAG debugging interface (Fig. 2 b), user-machine interface (Fig. 2 d and Fig. 2 e);
Fig. 3 a and Fig. 3 b are the principle schematic of highway toll collection system of the present invention with 5.8GHZ microwave communication module in the car-mounted device;
Fig. 4 is highway toll collection system of the present invention 5.8G rf chip state transition graph in the car-mounted device;
Fig. 5 a and Fig. 5 b are highway toll collection system of the present invention car-mounted device medium-high frequency card reading unit (Fig. 5 b) and ESAM encrypting module (Fig. 5 principle schematic a);
Fig. 6 a and Fig. 6 b are the schematic flow sheet of highway toll collection system of the present invention with ESAM encrypting module two-stage encrypting and authenticating in the car-mounted device;
Fig. 7 a(sun power, direct current load module), Fig. 7 b(MSP430 BK5822 the RC522 supply module), Fig. 7 c(power management module) and Fig. 7 d(LCD supply module) be that highway toll collection system of the present invention is with the electrical principle synoptic diagram of power management module in the car-mounted device;
Fig. 8 is the principle of work synoptic diagram of highway toll collection system of the present invention with power supply power supply in the car-mounted device.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in restriction the present invention.
In order to overcome complex structure in the design of present board units, functional incomplete, deficiency that cost performance is not high, according to the embodiment of the invention, shown in Figure 8 as Fig. 1 a-, a kind of highway toll collection system car-mounted device is provided, it is the specialized equipment that is applied to highway toll collection system, can be according to national standard, for the user provides a cover application demand quite complete, high performance-price ratio.
Referring to Fig. 1 a-Fig. 8, this highway toll collection system car-mounted device, mainly comprise the MCU control module, module and human-computer interface module are unloaded in the DSRC microwave communication unit that is connected with this MCU control module, high frequency card reading unit, ESAM encrypting module, IC-card plug-in card trigger module, usb interface module, JTAG debugging interface, tamper respectively; Also comprise the power management module that is connected with this MCU control module, and the chargeable lithium cell that is connected with this power management module, external power supply, solar panel and USB power supply.This highway toll collection system car-mounted device, multiple functional, simple in structure and cost performance is high.
Embodiment one
Shown in Fig. 1 a, Fig. 1 b, use in the car-mounted device at the highway toll collection system of present embodiment, the MCU control module, respectively with DSRC microwave communication unit, high frequency card reading unit, ESAM encrypting module, power management module, usb interface module, human-computer interface module, JTAG debugging interface, tamper are unloaded module and are connected with IC-card plug-in card trigger module, in order to realize to the control of corresponding module with communicate by letter.Particularly:
⑴ MCU control module, be connected with DSRC microwave communication unit, high frequency card reading unit, usb interface module, human-computer interface module and power management module respectively, mainly finish the parsing of generation, receiving and transmitting signal of the transmitting-receiving control signal of microwave communication part and coding, the conversion of mode of operation, the realization of DSRC agreement, the information interaction of high frequency Card Reader part and with the exchanges data of encrypting module, also have driving, USB interface control, the power management control of man-machine interface.
⑵ DSRC microwave communication unit is connected with the MCU control module, mainly finish signal reception, transmission, modulating/demodulating, filtering, wake-up signal detection and with the MCU control module between function such as communicate by letter, realize meeting the short-distance wireless communication of CNS DSRC agreement.
Here, the MCU control module is connected with DSRC microwave communication unit, is used for order and data that DSRC microwave communication unit is received are resolved, and by high frequency card reading unit and ESAM encrypting module two interface C PU is sticked into line operate according to analysis result.
DSRC microwave communication unit is connected with the MCU control module with common i/o port by the external interrupt interface, be used for finishing signal reception, transmission, modulating/demodulating, wake-up signal detection and with the MCU control module between function such as communicate by letter, realize meeting the special short distance radio communication of CNS DSRC agreement.
DSRC microwave communication unit can cooperate the MCU control module to realize the DSRC agreement, and the physical layer link parameter meets ETC standard GB/T20851-2007.
⑶ high frequency card reading unit is connected with the MCU control module, finishes the read-write capability to IC-card or high frequency card, realizes the charge function; The ESAM encrypting module is connected with the MCU control module, mainly cooperates the high frequency card reading unit, finishes the two-way authentication work of board units and IC-card, the realization valuation of safety function such as deduct fees.
Here, the high frequency card reading unit links to each other with the MCU control module by common i/o port, is used for driven antenna IC-card is carried out read-write operation, then the data of gained is returned to the MCU control module.
The ESAM encrypting module links to each other with the MCU control module by serial line interface, is used for data such as authentication storage key, subscriber data, and can finish data are encrypted and to the mutual authentication of card.
⑷ power management module is mainly used in the management of the voltage monitoring of solar charging electric unit and chargeable lithium cell, is used for the chargeable lithium cell output voltage is converted to the required operating voltage of board units, and provides required energy for MCU control module, high frequency card reading unit, microwave communication module, human-computer interface module.
Here, power management module, can adopt the pattern of high light type solar recharging module+rechargeable type lithium ion battery+circumscribed charger, be used for the chargeable lithium cell output voltage is converted to the required operating voltage of board units, can provide energy for MCU control module, DSRC microwave communication unit, high frequency card reading unit and human-computer interface module.
⑸ usb interface module is connected with the serial ports of MCU control module, realizes that mainly USB changes serial port function, is inconvenient to dismantle because the back is installed, and so just can make things convenient for later Data Update.
Usb interface module can be realized the functions such as upgrading that highway toll collection system is used car-mounted device place system with renewal and the highway toll collection system of car-mounted device user profile.
⑹ the common I/O mouth of human-computer interface module and MCU control module is connected, and is mainly used to explicit user Transaction Information and highway toll collection system with the state of car-mounted device, for the user provides the observability explanation.
⑺ the interruptive port that module and MCU control module are unloaded in tamper is connected, and is mainly used to whether the IO generation external interrupt of the external signal of sensing by MCU is used for the monitoring car carrier unit and is illegally dismantled.
⑻ the interruptive port of IC-card plug-in card trigger module and MCU control module is connected with common I/O mouth, be mainly used to realize that intelligent double-interface card contacts with the electric of smart card match circuit, and possesses the plug-in card trigger switch, the IO generation external interrupt of the external signal of sensing by MCU, thus the state of detection IC-card.
⑼ JTAG debugging interface is connected with the MCU control module, is mainly used in the on-line debugging in the design phase.
The baseband processing chip of above-mentioned MCU control module (or little process chip), the 430 series monolithic MSP430F5418A(that adopt TI company are 16 low-power consumption microcontroller MSP430F5418A); It adopts 0.18um technology, and the 1MIPS consumed current has reached surprising 160uA, PMM(power management module on the sheet) allow the user guarantee least in power-consuming according to MCU control module load flexible core voltage.In addition, possesses multiple low power consumpting state.In addition, can only reach 25MIPS though the dominant frequency of MCU control module is the highest, because multi-channel DMA is flexibly arranged, can link with Timer, realize moving automatically of data and do not interfere with CPU, this has greatly strengthened the data throughput capabilities of MCU control module, makes dominant frequency no longer become bottleneck.
In the above-described embodiments, the MCU control module is used for this highway toll collection system of control with the operation of car-mounted device as the core of highway toll collection system with car-mounted device, coordinates the work of each module, and is specific as follows:
⑴ after highway toll collection system was initialised with car-mounted device, the MCU control module entered low-power consumption mode immediately, the wake-up signal that the look-at-me of wait IC-card plug-in card trigger module also has DSRC microwave communication unit to send.
⑵ when insert the IC-card draw-in groove corresponding with IC-card plug-in card trigger module when IC-card, can in IC-card plug-in card trigger module, produce look-at-me, wake the MCU control module up, make it enter normal mode of operation, be used for controlling the power supply that power management module is opened the high frequency card reading unit, and then finish the reading of IC-card data message, read finish after, enter low-power consumption mode immediately;
When this highway toll collection system enters the communication zone of roadside device with car-mounted device, wake the MCU control module up by the wake-up signal that is returned by DSRC microwave communication unit, make it enter normal mode of operation, come to set up communication link with roadside device, finish whole non-parking charge process, afterwards, the MCU control module comes back to low-power consumption mode.
⑶ in the process of communication, and the MCU control module can be controlled hummer and LED light is come the state of whole board units is pointed out by power management module.
Referring to Fig. 2 a, Fig. 2 b, Fig. 2 c, Fig. 2 d, Fig. 2 e, Fig. 2 f, Fig. 2 g and Fig. 2 h, the MCU control module unloads module with usb interface module, human-computer interface module, JTAG debugging interface, tamper respectively and is connected with IC-card plug-in card trigger module.
Particularly, usb interface module can adopt CP2102 as conversion chip, realizes that USB changes the function of serial ports.Module is unloaded in tamper, can adopt microswitch in conjunction with MCU, realizes the anti-disassembling function of OBU, with the microswitch external interface.IC-card plug-in card trigger module can adopt pushbutton switch and IC-card draw-in groove, and in conjunction with the MCU control module, realizes the IC-card status detection and finishes electric contact to Contact Type Ic Card.Human-computer interface module can adopt the 128*64 LCDs, is used for the explicit user Transaction Information, and the duty of board units.The JTAG debugging interface, can adopt 6 line standard jtag interfaces, by ' ' TCK, TMS, TDO, TDI, RST, GND ' ' pin are connected with the MCU control module, are used for realizing to the on-line debugging of whole highway toll collection system with car-mounted device.
Embodiment two
Referring to Fig. 3 a and Fig. 3 b, DSRC microwave communication unit mainly is connected with the MCU control module, for generation of with handle microwave signal, the microwave signal that produces is sent to roadside device by antenna, and will send into the MCU control module from the microwave signal that antenna receives.
Above-mentioned DSRC microwave communication unit can adopt microwave radio transceiving chip BK5822.Microwave radio transceiving chip BK5822 is a 5.8G rf chip that meets Chinese drive-in toll national standard specially, integrated complete radio-frequency receiving-transmitting and modulation function, and also the processing of frame also embeds fully; In addition, microwave radio transceiving chip BK5822 is also integrated wake-up circuit, the sleep current that can be provided at 13uA is issued to-42dBm wake the function that sensitivity wakes OBU up up; Peak power output reaches 2dBm; Can realize that the output power from-20dBm to 2dBm regulates; The sensitivity of microwave radio transceiving chip BK5822 receiver is 10
-5The condition of the bit error rate be issued to-60dBm; And, microwave radio transceiving chip BK5822 only needs a spot of external devices, surpass in sensitivity on the basis of GB requirement, the work power consumption is extremely low, be fit to very much development and application fast cheaply, can make whole highway toll collection system more simple and reliable with the project organization of car-mounted device.
' ' BK_EN, SPI_CLK, SPI_CS, SPI_DO, SPI_DI, WK_DT, GPIO31, IRQ's data-signal of DSRC microwave communication unit ' ' link to each other with general purpose I/O port, the external interrupt port of MCU control module (as microprocessor chip or 430 series monolithic MSP430F5418A); Detect the envelope of N 14KHZ when wake-up circuit after, send ' ' 1 ' ' level at the WK_DT end, the numerical value of N can be by the register setting, after the MCU control module detects the WK_DT useful signal, just can write corresponding value to the related register of microwave radio transceiving chip BK5822 by the SPI interface and start microwave radio transceiving chip BK5822, microwave radio transceiving chip BK5822 gives MCU control module with detected packet after starting, and has the MCU control module to carry out the processing in later stage.
Referring to Fig. 4, microwave radio transceiving chip BK5822 can be with four kinds of patterns/state work: sleep pattern, standby mode, sending mode and receiving mode; It is to realize by sending mode and receiving mode state machine that four kinds of patterns are switched.
Embodiment three
Referring to Fig. 5 a and Fig. 5 b, finish Secure Transaction process to user's card jointly by high frequency card reading unit and ESAM encrypting module; The kind of IC-card can be two interface C PU cards, and U16 is the IC-card draw-in groove.
The data-signal of high frequency card reading unit ' ' MISO, MOSI, SCK, NSS, RST522 ' ', link to each other with the general purpose I/O port of MCU control module (as microprocessor chip or 430 series monolithic MSP430F5418A), earlier by the MCU control module, control card-reader driver program antenna carries out read-write operation to IC-card, then the data of gained are returned to the MCU control module, wait for sending data to roadside unit.
Above-mentioned card reader can adopt the card reader chip RC522 of NXP company.Card reader chip RC522, be to be applied to a member in the high integrated Card Reader chip series in the 13.56MHz contactless communication, this Card Reader chip series has been utilized advanced modulation and demodulation concept, fully-integrated all types of passive contactless mode and agreements of reading under the 13.56MHz; MF RC522 supports all layers of IS014443A, and transmission speed is up to 424kbps, and inner transmitter part does not need to increase active circuit and just can directly drive closely antenna; Receiving unit provides a firm and effective demodulation decoding circuit, is used for receiving the answer signal of IS014443A compatibility; Digital processing partly provides odd even and CRC measuring ability; Be specially adapted to require the application scenario of low cost, small size, high performance contactless communication.
Above-mentioned ESAM encrypting module can adopt the ESAM chip of holding the exploitation of strange company.The ESAM chip, have safeguard constructions such as safe ROM and EEPROM security control, real random number generator RNG, DES/3DES accelerator and superencipherment coprocessor ACE, the hardware security performance reaches ITSEC E4 grade standard, has hardware security characteristics such as anti-detection, anti-attack, self-destruction; Be mainly used to data such as authentication storage key, subscriber data, and can finish data are encrypted and to the mutual authentication of card.
The two-stage encrypting and authenticating implementation detail of ESAM encrypting module is as follows:
⑴ the flow process of internal authentication, referring to Fig. 6 a:
1. the high frequency card reading unit reads the card sequence number on the subscriber card, send ESAM module;
2. the ESAM module is encrypted the card sequence number with the internal authentication key, generates enciphered data D1;
3. the high frequency card reading unit send encrypted instruction and card number to give subscriber card, subscriber card internal authentication secret key encryption, and send encrypted result D2 back to the high frequency card reading unit;
4. the high frequency card reading unit compares two encrypted result D1 and D2, and identical then authentication is by continuing operation; Difference is authentification failure then, withdraws from.
⑵ the flow process of external authentication, referring to Fig. 6 b:
A, to the external authentication of ESAM module:
⑴ high frequency card reading unit is gone random number from the ESAM module;
⑵ high frequency card reading unit is sent subscriber card with random number, and subscriber card to random number encryption, and is sent encrypted result D1 back to the high frequency card reading unit with corresponding external authentication key;
⑶ high frequency card reading unit is sent out the external authentication instruction with encrypted result D1, and is sent to the ESAM encrypting module;
⑷ ESAM module tells whether the authentication of high frequency card reading unit is successful, and success also returns ' 9000 ', then allows;
⑸ high frequency card reading unit writes 01 wallet file with institute's button amount of money, and operational factor writes 02 file.
B, to the external authentication of subscriber card:
⑴ high frequency card reading unit is got random number from subscriber card;
⑵ high frequency card reading unit is sent ESAM module with random number, and the ESAM module is carried out close to random number with corresponding external authentication key, and sends encrypted result D1 back to the high frequency card reading unit;
⑶ subscriber card is told whether success of high frequency card reading unit authentication, and success also returns that ' ' 9000 ' ' then allows the high frequency card reading unit return message to be write 02 file of subscriber card.
Embodiment four
Referring to Fig. 7 a, Fig. 7 b, Fig. 7 c and Fig. 7 d, in power management module, the pattern of high light type solar recharging module+rechargeable type lithium ion battery+circumscribed charger is adopted in the power supply design.
Above-mentioned power management module can adopt the power management chip of BQ2403x series.The power management chip of BQ2403x series can be to battery charge when powering with car-mounted device to highway toll collection system; Avoid problems such as charging termination and safe timer, thereby improved the stability of highway toll collection system with the car-mounted device power supply as much as possible; In addition, can also pass through external power supply, solar panel and USB power supply, highway toll collection system is powered and charging with car-mounted device; The state of the several pins by setting BQ2403 is determined the priority of power supply and charging.
Referring to Fig. 8, be the frame diagram of each module for power supply for power supply.Consider in the real work that high frequency card reading unit and human-computer interface module (as LCD display) are not in running order always, in order to chase after its minimum power consumption, so take independent power supply plan, control enabling of power supply by the MCU control module.
Because the operating voltage of each module is all at 3.3V, the voltage transformation module of power management module all adopts linear voltage regulator MIC5205 except LCD display, it is the low pressure difference linear voltage regulator of a extremely low power dissipation, low noise, output current 150mA, have low-down pressure reduction (usually at underload 17mV and 165mV 150mA) and very low ground current (during power consumption 600uA output 100mA); Linear voltage regulator MIC3775 is adopted in the LCD display power supply, and its output current reaches 700mA.
During concrete enforcement, the microprocessor chip of above-mentioned MCU control module can adopt 16 low-power consumption microcontroller MSP430F5418A of TI company; DSRC microwave communication unit can adopt a 5.8GHz rf chip BK5822 that meets Chinese drive-in toll national standard specially; The card reader chip of high frequency card reading unit can be selected for use to be applied in the 13.56MHz contactless communication RC522 in the high integrated Card Reader chip series; The ESAM encrypting module can adopt the ESAM application module that widespread usage is worth that has of holding the exploitation of strange company; Human-computer interface module can adopt 128*64 dot matrix drawing type LCD MODULE, can provide more detailed Transaction Information and personalized service for the user; IC-card plug-in card trigger module, the IC-card draw-in groove that can adopt can be finished the identification to the contact part of two interface C PU cards, can finish again card is inserted status detection; Power management module, can adopt the pattern of high light type solar recharging module+rechargeable type lithium ion battery+circumscribed charger, the full jig frequency number of rechargeable type lithium cell charging reaches more than 500 times, to overcurrent, excess temperature, under-voltage, overcharge, short-circuit protection all has " HOLD " function, also have electric weight and cross low alarm module; Module is unloaded in tamper, can adopt microswitch is the abbreviation of OnboardUnit to OBU(in conjunction with the MCU control module, put exactly onboard, be used for and the microwave equipment of the roadside RSU communication of setting up) state detect, be used for the monitoring highway toll collection system and whether illegally dismantled with car-mounted device.
The highway toll collection system car-mounted device of the various embodiments described above of the present invention comprises that MCU control module, DSRC microwave communication unit, high frequency card reading unit, power management module, ESAM encrypting module, usb interface module, human-computer interface module, JTAG debugging interface, tamper unload module and IC-card plug-in card trigger module; DSRC microwave communication unit links to each other with the MCU control module, realizes meeting the special short distance radio communication of Chinese ETC international standard; The high frequency card reading unit realizes the IC-card secure data is exchanged in conjunction with the ESAM encrypting module; Power management module adopts the pattern of high light type solar recharging module+rechargeable type lithium ion battery+circumscribed charger.
In sum, the highway toll collection system car-mounted device of the various embodiments described above of the present invention adopts modularization framework, the circuit structure simple possible, and superior performance, multiple functional, meet national standard fully, can provide convenience for the user, the service of safety.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. highway toll collection system car-mounted device, it is characterized in that, comprise the MCU control module, and the DSRC microwave communication unit that is connected with described MCU control module respectively, high frequency card reading unit, ESAM encrypting module, IC-card plug-in card trigger module, human-computer interface module, usb interface module and power management module; Wherein:
Described MCU control module, for the generation of the transmitting-receiving control signal of finishing described DSRC microwave communication unit, parsing and coding, the conversion of mode of operation and the realization of DSRC agreement of receiving and transmitting signal, be used for the information interaction of high frequency card reading unit and with the exchanges data of ESAM encrypting module, and be used for to described human-computer interface module driving, to the control of usb interface module and power management module.
2. highway toll collection system car-mounted device according to claim 1 is characterized in that, comprises that also the tamper that is connected with described MCU control module unloads module; The interruptive port that module and MCU control module are unloaded in described tamper is connected, and whether the IO that the external signal that is used for sensing is passed through the MCU control module produces external interrupt, illegally dismantled with monitoring.
3. highway toll collection system car-mounted device according to claim 2 is characterized in that, module is unloaded in described tamper, comprises the microswitch that is connected with the MCU control module; Described microswitch is used for realizing the anti-disassembling function of OBU as external interface.
4. highway toll collection system car-mounted device according to claim 1 is characterized in that, also comprises the JTAG debugging interface that is connected with described MCU control module.
5. highway toll collection system car-mounted device according to claim 4 is characterized in that, described JTAG debugging interface comprises 6 line standard jtag interfaces; The TCK pin of described 6 line standard jtag interfaces, TMS pin, TDO pin, TDI pin, RST pin and GND pin are connected with the MCU control module respectively.
6. according to each described highway toll collection system car-mounted device among the claim 1-5, it is characterized in that little process chip of described MCU control module comprises 16 low-power consumption microcontroller MSP430F5418A; And/or,
Described DSRC microwave communication unit comprises microwave radio transceiving chip BK5822; And/or,
The card reader chip of described high frequency card reading unit comprises card reader chip RC522; And/or,
Described ESAM encrypting module comprises the ESAM application module of holding the exploitation of strange company; And/or,
Described IC-card plug-in card trigger module comprises and can finish the identification of the contact of two interface C PU cards part, can finish the IC-card draw-in groove that card is inserted status detection again; And/or,
Described human-computer interface module comprises 128*64 dot matrix drawing type LCD MODULE; And/or,
Described usb interface module comprises conversion chip CP2102, and described conversion chip CP2102 is used for realizing that USB changes the function of serial ports.
7. according to each described highway toll collection system car-mounted device among the claim 1-5, it is characterized in that, described power management module, comprise high light type solar recharging module, rechargeable type lithium ion battery and circumscribed charger, and the voltage transformation module that is connected with the circumscribed charger with high light type solar recharging module, rechargeable type lithium ion battery respectively.
8. according to each described highway toll collection system car-mounted device among the claim 1-5; it is characterized in that; described voltage transformation module; comprise the linear voltage regulator MIC3775 that is connected with human-computer interface module; the voltage transitions chip that is connected with other consumers, and the overcurrent that is connected with the voltage transitions chip with described linear voltage regulator MIC3775 respectively, excess temperature, under-voltage, overcharge, short-circuit protection module and electric weight cross low alarm module.
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| CN2013101600253A CN103258354A (en) | 2013-05-02 | 2013-05-02 | Vehicle-mounted device for expressway non-stop electronic toll collection system |
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| CN105551201B (en) * | 2015-12-07 | 2018-08-07 | 广东南方海岸科技服务有限公司 | Anti-dismantling boat-carrying electronic equipment and its tamper discharging method |
| WO2017197689A1 (en) * | 2016-05-18 | 2017-11-23 | 中兴通讯股份有限公司 | Sim card processing method and apparatus, terminal, and esam chip |
| CN106558116A (en) * | 2016-08-23 | 2017-04-05 | 深圳成谷科技有限公司 | Voice messaging method for pushing, board units and electronic charging system without parking |
| CN106558116B (en) * | 2016-08-23 | 2020-08-11 | 深圳成谷科技有限公司 | Voice information pushing method, vehicle-mounted unit and electronic toll collection system |
| CN110599611A (en) * | 2018-06-12 | 2019-12-20 | 北京聚利科技股份有限公司 | ETC lane control passing method and equipment |
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Application publication date: 20130821 |