Highway vehicle-mounted ETC protocol monitoring device

A technology for highways and monitoring devices, applied in the field of ETC, can solve the problems of huge hidden dangers, low detection efficiency, and long process time, so as to achieve the effect of efficient and fast detection efficiency and reducing hidden dangers.

Pending Publication Date: 2021-10-01
山西省交通科技研发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The communication process between RSU and OBU in ETC transactions is a key technical content. Currently, there is no effective technical means for whether the indicators and data meet the corresponding standards and specifications, such as "Short-range Communications for Electronic Toll Collection" (GB / T20851–2007), etc.; in addition, the gantry system is installed on the expressway, and the traffic flow and speed are too fast. If the inspectors carry out on-site testing work, traffic accidents will easily occur, which will pose a huge safety hazard, or the road will be closed for each test. The detection efficiency is low and the process takes a long time, which seriously affects the normal traffic of the expressway

Method used

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  • Highway vehicle-mounted ETC protocol monitoring device
  • Highway vehicle-mounted ETC protocol monitoring device
  • Highway vehicle-mounted ETC protocol monitoring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] When the measured ETC system is the expressway toll station lane, when the measurement starts, the middle of the vehicle 18 is 20 meters away from the RSU antenna 17 and starts to travel according to the speed limit of the toll station lane, and the variable attenuator 5 of the RSU is adjusted. gain, so that the downlink RSU monitoring antenna 2 only receives the RSU radio frequency signal of the measured lane, and further the ETC protocol monitoring host and software start to run, and the high-speed reading main control circuit 9 monitors the downlink RSU to monitor the radio frequency link and the uplink OBU to monitor the radio frequency link The ETC air transaction data cached on the road and parse the data frame, record the time and location information of each frame at the time of collection, and store it in the frame database; when the collection vehicle 18 drives directly under the RSU antenna, the ETC protocol monitoring software extracts the current transaction ...

Embodiment 2

[0031] When the ETC system under test is an expressway mast lane, when the measurement starts, the vehicle 18 is 200 meters away from the RSU antenna array. The gain of the attenuator 5 makes the downlink RSU monitoring antenna 2 only receive the coverage area of ​​the RSU antenna array of the driving direction lane, and cannot receive the RSU antenna signal of the opposite lane. Further, the ETC protocol monitoring host and software start to run, and the high-speed reading main control circuit 9 passes the monitoring The downlink RSU monitors the radio frequency link and the uplink OBU monitors the ETC air transaction data cached by the radio frequency link and parses the data frame, and records the time and location information of each frame's acquisition time and stores it in the frame database; when the acquisition vehicle 18 travels to the RSU When the antenna is directly below, the ETC protocol monitoring software extracts all data frames of the current transaction, and a...

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Abstract

The highway vehicle-mounted ETC protocol monitoring device comprises an uplink OBU monitoring antenna, a downlink RSU monitoring antenna, a 4G antenna, an uplink OBU monitoring variable attenuator, a downlink RSU variable attenuator, a radio frequency cable, an uplink ETC protocol analysis circuit, a downlink ETC protocol analysis circuit, a main control circuit, a power supply circuit, a 4G radio frequency connecting line, a wheel speed encoder and an ETC protocol monitoring module. According to the invention, real-time monitoring of ETC communication process data of a toll station and a portal system under a normal traffic environment of a highway without stopping or closing the highway can be realized, key indexes and parameters, such as air transaction time, frame communication time, frame data, transaction position and the like, can be analyzed, the monitored data can be further analyzed and evaluated, problem positioning can be carried out on ETC transaction failure conditions possibly caused by vulnerabilities or defects of RSU hardware and lane and portal frame software, and a technical basis and a solution method are provided for stable operation and scientific management and maintenance of ETC.

Description

technical field [0001] The invention belongs to the technical field of ETC, in particular to a vehicle-mounted ETC protocol monitoring device for expressways. Background technique [0002] With the implementation of the national traffic strategy of canceling provincial boundary toll stations, my country's expressways have basically realized the full coverage of ETC lanes, and the toll mode has basically completed the transition from the original closed toll to the segmented free flow toll. Faced with such a large number of toll stations and ETC lanes of the gantry system in the national road network, the performance of the ETC directly affects the stable operation of the toll system. To ensure the correctness and effectiveness of ETC system operation. [0003] The communication process between RSU and OBU in ETC transactions is a key technical content. Currently, there is no effective technical means for whether the indicators and data meet the corresponding standards and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L29/06H04W24/08G07B15/06
CPCH04L43/18H04L69/22H04W24/08G07B15/063
Inventor 周晓旭刘晓李永胜段英杰周亚军柴辉照刘博薛春明岳鹏程周丽军
Owner 山西省交通科技研发有限公司
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