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Fault diagnosis method and system of on-board unit and on-board unit

A fault diagnosis system and vehicle-mounted unit technology, which is applied in the direction of vehicle testing, machine/structural component testing, and measuring devices, can solve problems such as unfavorable OBU repairs and difficult to confirm the cause of faults, so as to meet the needs of use and reduce The effect of improving the repair rate and improving the repair speed

Active Publication Date: 2014-03-12
SHENZHEN GENVICT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to confirm the cause of the failure of some reworked products through some tests; however, because some failures occur in a specific use environment, the actual application scenario cannot be restored or simulated by technicians, so some reworked products are not easy to confirm Cause of failure (such as repair caused by improper use), which is not conducive to the repair of OBU

Method used

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  • Fault diagnosis method and system of on-board unit and on-board unit
  • Fault diagnosis method and system of on-board unit and on-board unit
  • Fault diagnosis method and system of on-board unit and on-board unit

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Experimental program
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Embodiment 1

[0032] Please refer to figure 1 , the fault diagnosis method of the OBU in this embodiment mainly includes the following steps:

[0033] Step S101: Execution failure information storage step, the OBU judges whether the execution of the instruction fails during the operation of various specified processes, and if the execution of the instruction fails, records the corresponding execution failure information in the storage area of ​​the OBU.

[0034] As one of the key DSRC devices, in order to meet technical standards and use requirements, OBU will go through a variety of instruction processes from production to actual use, mainly including primary issuance, secondary issuance, activation and testing, and actual transaction processes . In each process, OBU will execute multiple instructions according to a certain order. In most cases, these instructions will be executed successfully. In unexpected cases, it will also be caused by improper use of OBU, process problems, signal st...

Embodiment 2

[0049] like Image 6 As shown, this embodiment provides a specific process for OBU to implement fault diagnosis in the transaction process, which mainly includes the following steps:

[0050] Step S601: the OBU wakes up after entering the antenna coverage area of ​​the RSU.

[0051] Step S602: Initialize the system and the external reading device.

[0052] Step S603: OBU judges whether the transaction is successful, if yes, go to step S606, otherwise go to step S604.

[0053] Step S604: OBU generates the corresponding failure record structure rr_record, each structure is used as a record carrying the failure information of this execution, including the failure type failure instruction, failure response, index number and check code, each record The index number is automatically incremented by 1.

[0054] Step S605: Store the value of rr_record in the storage area of ​​the OBU, and at the same time perform crc data verification to avoid data tampering during storage, and back...

Embodiment 3

[0060] like Figure 7 As shown, this embodiment provides the steps of using an external reading device to read the execution failure information stored in the OBU in the process of fault diagnosis and detection of the OBU, mainly including the following process:

[0061] Step S 701: After the OBU is connected to an external reading device through a wireless communication interface, a serial port, an emulator, etc., it first receives an information reading request.

[0062] Step S702: The external reading device first reads the total number of records, that is, the number of failed instructions, and fetches the failure record structure with index number N=1 to read its specific information.

[0063] Step S703: Read the specific information in the Nth structure.

[0064] Step S704: Perform CRC data verification, and judge whether the verification is successful, if yes, go to step S705, otherwise go to step S708.

[0065] Step S705: Sending back a reminder of the read informati...

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Abstract

The application discloses a fault diagnosis method and system of an on-board unit (OBU) and an OBU. The fault diagnosis method comprises the following steps of a failure information storage execution step and a failure information providing execution step. To be specific, according to the failure information storage execution step, when an OBU runs a designated flow, if the instruction execution fails, corresponding execution failure information is recorded to a storage zone in the OBU; and according to the failure information providing execution step, the OBU provides the execution failure information for external reading equipment. According to the application, the technicist can carry out diagnosing on the OBU fault accurately, rapidly and conveniently during the repairing process, thereby improving the repairing speed of the OBU and ensuring the repairing quality. Moreover, the technicist of the OBU manufacturer can analyze and evaluate the execution failure information recorded in the OBU so as to perfect all links, including designing, testing and using and the like, of the product, thereby minimizing the repair rate of the product.

Description

technical field [0001] The present application relates to the field of intelligent transportation (ITS: Intelligent Transportation System), in particular to a fault diagnosis method, OBU and system for on-board units (OBU: On-board Units). Background technique [0002] Dedicated short-range communication (DSRC: Dedicated Short Range Communications) technology is used for short-range communication between the roadside equipment (RSU: Road Side Unit) on the road and the OBU on the vehicle to realize the deduction or monitoring of the vehicle, such as in In the Electronic Toll Collection (ETC) system, the RSU interacts with the OBU on the vehicle through microwave signals, so that the vehicle can automatically pay the toll without stopping. [0003] With the rapid development and wide application of DSRC technology, and the continuous expansion of the OBU user base, people put forward higher requirements for OBU maintenance. Once the OBU is damaged, it is first necessary to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 郭云峰段作义乔焕爽
Owner SHENZHEN GENVICT TECH
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