CN203911933U - ETC roadside unit having radio frequency self-test function - Google Patents

ETC roadside unit having radio frequency self-test function Download PDF

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Publication number
CN203911933U
CN203911933U CN201320879189.7U CN201320879189U CN203911933U CN 203911933 U CN203911933 U CN 203911933U CN 201320879189 U CN201320879189 U CN 201320879189U CN 203911933 U CN203911933 U CN 203911933U
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CN
China
Prior art keywords
module
frequency
roadside unit
self
circuit
Prior art date
Application number
CN201320879189.7U
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Chinese (zh)
Inventor
马春香
杨胜姚
王开然
刘金福
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北京万集科技股份有限公司
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Priority to CN201320879189.7U priority Critical patent/CN203911933U/en
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Publication of CN203911933U publication Critical patent/CN203911933U/en

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Abstract

The utility model relates to an ETC (Electronic Toll Collection) roadside unit having a radio frequency self-test function. The roadside unit can complete an online self test on radio frequency performance without affecting normal operation. A conventional ETC roadside unit is not provided with a radio frequency module self-test function. Through addition of a power detection module, a frequency detection module and a transmit-receive coupling and switching module to the conventional roadside unit, the ETC roadside unit in the utility model is provided with the radio frequency self-test function and can detect the transmitting power, transmitting frequency, receiving sensitivity and receiving bandwidth at any time. Therefore, convenience is provided to technical service staff to conduct daily maintenance and trouble removal for the roadside unit, risks brought by equipment faults are reduced, the production and detection process can be simplified, and the production and detection efficiency of the roadside unit product can be improved.

Description

A kind of ETC roadside unit with radio frequency self-checking function
Technical field
The utility model, about the electronic toll system field of intelligent transportation system, is a kind of ETC roadside unit with radio frequency self-checking function concretely.
Background technology
Electronic charging (ETC:Electronic Toll Collection) system is called again no-stop charging system.ETC system adopts special short-distance wireless communication (DSRC:Dedicated Short-Range Communication) technology to complete whole charging process, so that vehicle keeps transport condition and need not stop in whole charging process.
Traditional E TC roadside unit is in the time of Test And Checkout, need to build special test environment, adopt instrumentation to test every radio-frequency (RF) index as frequency spectrograph, signal source etc., this test is also more feasible in device fabrication process, after device assembles completes, to carry out overall inspection to equipment, need again to take equipment apart and test.In addition, if need to equipment be tested or be patrolled and examined in site of deployment, adopt instrumentation to test and can run into very large difficulty.
ETC roadside unit radio-frequency module can make hydraulic performance decline along with the factor such as component aging, environmental change, even breaks down, and this equipment with failure operation can bring a lot of problems, such as deduct fees, leak transaction, false transaction etc. by mistake.Because ETC roadside unit is arranged on the portal frame of top, track, want checkout equipment performance whether also to meet index, need to close ETC transaction track, building test environment adopts professional instrument to test radio-frequency module, even need to be at high aerial work to get rid of the fault of roadside unit, this process not only affects the current of ETC track, but also has certain danger.
Utility model content
The utility model, on the basis of traditional E TC roadside unit, by improving transceiver module circuit, increases power detection module, frequency detection module, transmitting-receiving coupling module, has realized the self-checking function of radio-frequency module.Compare the ETC roadside unit of radio-frequency module without self-checking function, staff can obtain at any time by ETC roadside unit self-checking function the performance index of its radio-frequency module, and guarantee equipment is operated in normal condition always.
The utility model roadside unit comprises control module, transmitter module, receiver module, PSAM card module, communication module, memory module, power detection module, it is characterized in that, this roadside unit also comprises frequency detection module, transmitting-receiving coupling and handover module, has the function that transmitting power detects, tranmitting frequency detects, receiving sensitivity detects, receive bandwidth detection.
Described frequency detection module receives the frequency of signal for detection of receiver module, judge that whether signal exists offset frequency, comprises shaping circuit and counting circuit.Shaping circuit obtains the intermediate-freuqncy signal of receiver module mixing output the square wave of same frequency through shaping, by the frequency of counting electric circuit inspection square-wave signal, thereby obtain the frequency that receives signal.
Described transmitting-receiving coupling and handover module, for realizing transmitter module to the coupling of receiver module and the switching of transceiver mode, comprise self-inspection coupling circuit and Transmit enable circuit.The output of transmitter module is input to receiver module from self-inspection coupling circuit, realizes transmitter module and combines self-inspection with receiver module; The switching of Transmit enable circuit for transmitting and receiving, realizes the half-duplex operation between roadside unit and board units.
Described control module is used for managing whole roadside unit, and configuration transmits and receives module, realizes ETC transaction flow; Under Auto-Sensing Mode, control module is according to the result that detects feedback, regulate radio frequency parameter, automatic acquisition transmitting power, tranmitting frequency, receiving sensitivity, reception bandwidth, can be used for judging whether offset frequency of transmitter module, whether the signal that judgement receives there is offset frequency, judges that whether radio-frequency (RF) index is normal, whether diagnostic device in normal operating conditions, and testing result is exported.
Described power detection module is for obtaining the power output of transmitter module.
Transmitting after the information modulation that described transmitter module is mainly used in control module to send, according to the radio frequency parameters such as regulating transmitting power, tranmitting frequency, the index of modulation that arranges of control module.
Described receiver module is mainly used in receiving microwave signal, and microwave signal is carried out to demodulation, and the information after demodulation is passed to control module.
Described PSAM card module comprises at least one PSAM card, for the mutual certification with board units at process of exchange.
Described communication module is communicated by letter for this roadside unit and computer, controller, also can be used for human-computer interaction function.
Described memory module is for stored parameter and data.
According to the structure of the utility model ETC roadside unit, this roadside unit can be realized alone transmitting power detection, tranmitting frequency detection, receiving sensitivity detection, receive the function of bandwidth detection.
Described transmitting power detects, and transmitter module is set to outgoing carrier pattern, by power detection chip, microwave signal is converted to voltage signal, is calculated the power transmitting by voltage signal, for judging whether transmitter module power output meets the demands.
Described tranmitting frequency detects, transmitter module is set to outgoing carrier pattern, transmit and be input to receiver module through transmitting-receiving coupling circuit, the intermediate-freuqncy signal of receiver module mixing output obtains with square wave frequently through shaping, counting circuit calculates the frequency of square-wave signal, conversion obtains receiving the frequency of signal, i.e. whether tranmitting frequency is correct for judging the frequency of transmitter module output.
Described receiving sensitivity detects, transmitter module is set to modulation output mode, control module output data are to transmitter module, transmit and be input to receiver module through transmitting-receiving coupling circuit, receiver module demodulation output data, control module is adjusted transmitting power automatically according to the data of receiver module, detects receiving sensitivity, for judging that whether receiver module is normal.
Described reception bandwidth detection, transmitter module is set to modulation output mode, control module output data are to transmitter module, transmit and be input to receiver module through transmitting-receiving coupling circuit, receiver module demodulation output data, control module is adjusted tranmitting frequency automatically according to the data of receiver module, detects reception bandwidth, for judging that whether receiver module is normal.
The utility model is in the time of the production of ETC roadside unit, inspection, testing RF module function, staff triggers ETC roadside unit by man-machine interaction, ETC roadside unit receives after operational order the radio frequency parameter index such as transmitting power, frequency, receiving sensitivity, reception bandwidth that detects radio-frequency module by radio frequency self-checking function, when testing result is kept in memory, inform user by man-machine interaction.Man-machine interaction can show the parameter index of radio-frequency module in real time.
The beneficial effects of the utility model are: ETC roadside unit has possessed the self-checking function of radio-frequency performance, not only can facilitate regular maintenance and the fault of technical service personnel to described roadside unit to get rid of, and can also simplify production, inspection process, improve production, the checkability of described roadside unit product.In addition, in the time that equipment breaks down due to emergency case, warning reminding staff maintenance in time, avoids equipment belt failure operation, reduces risk.
Brief description of the drawings
Fig. 1 is the entire system block diagram of a kind of embodiment of the present utility model.
Fig. 2 is transmitting-receiving coupling and handover module schematic diagram.
Fig. 3 transmitting power overhaul flow chart.
Fig. 4 tranmitting frequency overhaul flow chart.
Fig. 5 receiving sensitivity overhaul flow chart.
Fig. 6 receives bandwidth overhaul flow chart.
Fig. 7 power-on self-test flow chart.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 is the entire system block diagram of a kind of embodiment of the present utility model, comprises following several module: control module 101, transmitter module 108, receiver module 106, transmitting-receiving coupling and handover module 107, power detection module 109, frequency detection module 105, PSAM card module 102, communication module 103, memory module 104.
After this device power, can automatically carry out radio-frequency performance self-inspection, in the time of self-inspection, transmitting-receiving coupling is operated in signal as shown in Figure 2 with handover module 107, and the output of transmitter module is coupled in receiver module.
When self-inspection, successively transmitting power, tranmitting frequency, receiving sensitivity, reception bandwidth are detected, judge that whether radio-frequency (RF) index is normal, while only having every radio-frequency performance normal, just can enter next flow process, in the time detecting that radio-frequency performance is abnormal, send and report to the police to backstage by communication module 103, and exit the Awaiting Overhauls such as normal operating conditions.As shown in Figure 7, wherein the detailed process of self-test of transmitting power, tranmitting frequency, receiving sensitivity, reception bandwidth is as follows for power-on self-test process:
Shown in Fig. 3, transmitting power self-inspection: transmitter module 108 is set to outgoing carrier pattern by main control module 101, adopts power detection chip, is voltage signal the power transfer of microwave signal, gather this magnitude of voltage by A/D, can obtain the power of microwave signal through converting.Main control module 101 judges that whether the microwave signal power converting is normal, if normally enter tranmitting frequency self-inspection flow process, otherwise returns to power abnormal information by man-machine interaction.
Shown in Fig. 4, tranmitting frequency self-inspection: main control module 101 is that transmitter module 108 is set to outgoing carrier pattern, unlatching self-inspection coupling circuit makes to transmit and is coupled to receiver module 106, and receiver module 106 carries out down-conversion demodulation; The intermediate-freuqncy signal of down-conversion output, through comparator shaping, obtains, with square wave frequently, obtaining the periodicity of this square-wave signal in certain hour by rolling counters forward, and periodicity is the frequency of intermediate-freuqncy signal divided by the time.The local frequency of intermediate-freuqncy signal frequency and receiver module is added, just can obtains tranmitting frequency.Main control module 101 judges that whether the tranmitting frequency obtaining is normal, if normally enter receiving sensitivity self-inspection flow process, otherwise by man-machine interaction return frequency abnormal information.
Shown in Fig. 5, receiving sensitivity self-inspection: main control module 101 is that transmitter module 108 is set to modulation output mode, sets frequency and power, unlatching self-inspection coupling circuit makes to transmit and is coupled to receiver module, and receiver module carries out down-conversion demodulation; Control module 101 is exported data to transmitter module, and from receiver module 106 reading out datas, the data that contrast sends and the data of reception, calculate the error rate; According to the size of the error rate, regulate the power of transmitter module 108, obtain receiving sensitivity.Main control module 101 judges that whether the receiving sensitivity obtaining is normal, receives bandwidth self-inspection flow process, otherwise return to receiving sensitivity abnormal information by man-machine interaction if normally enter.
Shown in Fig. 6, receive bandwidth self-inspection: main control module 101 is that transmitter module 108 is set to modulation output mode, sets frequency and power, unlatching self-inspection coupling circuit makes to transmit and is coupled to receiver module, and receiver module 106 carries out down-conversion demodulation; Control module 101 is exported data to transmitter module, and from receiver module 106 reading out datas, the data that contrast sends and the data of reception, calculate the error rate; According to the size of the error rate, regulate the frequency of transmitter module, calculate the difference between two frequencies, obtain receiving bandwidth.Main control module 101 judges that whether the reception bandwidth obtaining is normal, if the normal operational mode of described ETC roadside unit is set to normal mode of operation, enters arm's length dealing flow process; Otherwise return and receive bandwidth abnormal information by man-machine interaction.
After all radio-frequency enabled and performance self-inspection complete and be qualified, system enters normal operating conditions.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; be equal to replacement or changed according to the technical solution of the utility model and design thereof, within all should being encompassed in protection range of the present utility model.

Claims (2)

1. there is an ETC roadside unit for radio frequency self-checking function, comprise transmitter module, receiver module, PSAM card module, communication module, memory module, power detection module; It is characterized in that, this roadside unit also comprises:
Frequency detection module, comprises shaping circuit and counting circuit, receives the frequency of signal for detection of receiver module, judges whether signal exists offset frequency;
Transmitting-receiving coupling and handover module, comprise self-inspection coupling circuit and Transmit enable circuit, for realizing transmitter module to the coupling of receiver module and the switching of transceiver mode;
Control module, be connected with PSAM card module, memory module, communication module and frequency detection module respectively, configuration transmits and receives module, the result detecting for basis, regulate radio frequency parameter, automatic acquisition transmitting power, tranmitting frequency, receiving sensitivity, reception bandwidth, whether diagnostic device is in normal operating conditions.
2. ETC roadside unit according to claim 1, is characterized in that:
Described frequency detection module comprises shaping circuit and counting circuit, and shaping circuit obtains the intermediate-freuqncy signal of receiver module mixing output the square wave of same frequency through shaping, by the frequency of counting electric circuit inspection square-wave signal, thereby obtains the frequency that receives signal;
Described transmitting-receiving coupling and handover module comprise self-inspection coupling circuit and Transmit enable circuit, and the output of transmitter module is input to receiver module from self-inspection coupling circuit, realize transmitter module and receiver module joint-detection; The switching of Transmit enable circuit for transmitting and receiving, realizes the half-duplex operation between roadside unit and board units.
CN201320879189.7U 2013-12-27 2013-12-27 ETC roadside unit having radio frequency self-test function CN203911933U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106209282A (en) * 2016-06-29 2016-12-07 宇龙计算机通信科技(深圳)有限公司 Radio circuit and terminal
CN106324377A (en) * 2015-07-01 2017-01-11 北京展智工程技术有限公司 Equipment fault diagnosis and state monitoring system for toll collection lane
CN106353746A (en) * 2016-08-11 2017-01-25 同致电子科技(厦门)有限公司 Production debugging method of parking radar detectors
CN107016873A (en) * 2017-06-08 2017-08-04 安徽和力成信息科技有限公司 A kind of high speed ETC tracks operation monitoring system based on technology of Internet of things
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
CN108122404A (en) * 2017-10-24 2018-06-05 珠海格力电器股份有限公司 A kind of RF transmitter and its fault detection method, device and storage medium
CN108830948A (en) * 2018-06-11 2018-11-16 苟红俊 Vehicle-mounted money machine
CN109141524A (en) * 2018-08-17 2019-01-04 东莞市江夏建设工程有限公司 A kind of intelligent parking equipment fault detection system
CN109969476A (en) * 2017-12-28 2019-07-05 北京小池原品科技有限公司 A kind of open V-shape paper product bag open method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106324377A (en) * 2015-07-01 2017-01-11 北京展智工程技术有限公司 Equipment fault diagnosis and state monitoring system for toll collection lane
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
CN106209282A (en) * 2016-06-29 2016-12-07 宇龙计算机通信科技(深圳)有限公司 Radio circuit and terminal
CN106353746A (en) * 2016-08-11 2017-01-25 同致电子科技(厦门)有限公司 Production debugging method of parking radar detectors
CN107016873A (en) * 2017-06-08 2017-08-04 安徽和力成信息科技有限公司 A kind of high speed ETC tracks operation monitoring system based on technology of Internet of things
CN108122404A (en) * 2017-10-24 2018-06-05 珠海格力电器股份有限公司 A kind of RF transmitter and its fault detection method, device and storage medium
CN109969476A (en) * 2017-12-28 2019-07-05 北京小池原品科技有限公司 A kind of open V-shape paper product bag open method
CN108830948A (en) * 2018-06-11 2018-11-16 苟红俊 Vehicle-mounted money machine
CN109141524A (en) * 2018-08-17 2019-01-04 东莞市江夏建设工程有限公司 A kind of intelligent parking equipment fault detection system

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