CN104579800A - Communication method of diagnosis maintenance terminal and vehicle-mounted host and diagnosis maintenance system - Google Patents
Communication method of diagnosis maintenance terminal and vehicle-mounted host and diagnosis maintenance system Download PDFInfo
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- CN104579800A CN104579800A CN201510070044.6A CN201510070044A CN104579800A CN 104579800 A CN104579800 A CN 104579800A CN 201510070044 A CN201510070044 A CN 201510070044A CN 104579800 A CN104579800 A CN 104579800A
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Abstract
The invention discloses a communication method of a diagnosis maintenance terminal and a vehicle-mounted host and a diagnosis maintenance system. According to the method, after the diagnosis maintenance terminal receives a starting command of the vehicle-mounted host, a requiring frame is sent to the vehicle-mounted host. After the vehicle-mounted host continuously receives a plurality of effective requiring frames, the communication connection is successfully established, and an idle frame containing communication connection successfully-established information is sent to the diagnosis maintenance terminal. The diagnosis maintenance terminal receives the idle frame containing the communication connection successfully-established information and the communication connection of the vehicle-mounted host is successfully established, so that the normal communication connection between the diagnosis maintenance terminal and the vehicle-mounted host is realized.
Description
Technical field
The present invention relates to Train Control Technology field, relate to a kind of communication means and the diagnosis maintenance system of diagnosing maintenance terminal and on-vehicle host in particular.
Background technology
In Train Operation Control System Onboard main frame, the mode using common software to add configuration parameter improves versatility and the maintainability of software, only needs to configure different parameters, and do not need to make very large change to on-vehicle host software for different vehicles.Simultaneously, on-vehicle host is when running, hardware fault, software fault that meeting real-time detecting system may exist, and store application and trouble record, download and analytical applications failure logging, can the occurrence positions of quick position fault and occurrence cause, contribute to the reliabilty and availability of raising system.
In existing on-vehicle host diagnosis maintenance technology, between On-Board Diagnostics (OBD) terminal and on-vehicle host, cannot determine whether whether communication connection is normal.
Summary of the invention
In view of this, the invention provides a kind of communication means and the diagnosis maintenance system of diagnosing maintenance terminal and on-vehicle host, to realize the communication between On-Board Diagnostics (OBD) terminal and on-vehicle host.
For achieving the above object, the invention provides following technical scheme:
Diagnose a communication means for maintenance terminal and on-vehicle host, comprise
Receive the initiation command that on-vehicle host issues, issue multiple claim frame continuously to on-vehicle host;
Receive on-vehicle host to the idle frame of the feedback of described multiple claim frame, described idle frame comprises communication connection and is successfully established information;
Determine with the communication connection of described on-vehicle host normal, to receive the Frame that on-vehicle host issues.
Preferably, describedly determine with the communication connection of described on-vehicle host normal, also comprise afterwards:
When needing when there is no user instruction to send to on-vehicle host, regularly sending to on-vehicle host and keeping connecting frame, to keep being connected with the proper communication of on-vehicle host.
Preferably, the Frame that described reception on-vehicle host issues, also comprises afterwards:
The Frame received effectively is checked, if check result is abnormal, then confirms to disconnect with the communication connection of described on-vehicle host, re-establish communication connection;
Wherein, described effective inspection comprises data type inspection, data length inspection, timestamp inspection and CRC check.
Diagnose a communication means for maintenance terminal and on-vehicle host, comprising:
Issue sign on to diagnosis maintenance terminal, receive multiple claim frames that diagnosis maintenance terminal sends;
Judge multiple claim frames of receiving whether continuously and as effective claim frame, if then determine with the communication connection of described diagnosis maintenance terminal normal;
Issue to described diagnosis maintenance terminal and comprise the idle frame that communication connection is successfully established information, and accept the claim frame comprising user instruction of diagnosis maintenance terminal transmission.
Preferably, described issuing to described diagnosis maintenance terminal comprises the idle frame that communication connection is successfully established information, also comprises afterwards:
When needing when there being data to be sent to described diagnosis maintenance terminal, send the data to diagnosis maintenance terminal by Frame;
When needing when there is no data to be sent to affiliated diagnosis maintenance terminal, regularly send idle frame, to keep being connected with the proper communication of affiliated diagnosis maintenance terminal to diagnosis maintenance terminal.
Preferably, the described claim frame comprising user instruction accepting diagnosis maintenance terminal and send, also comprises afterwards:
The claim frame received effectively is checked, if check result is abnormal, then confirms to disconnect with the communication connection of described on-vehicle host, re-establish communication connection;
Wherein, described effective inspection comprises data type inspection, data length inspection, timestamp inspection and CRC check.
A kind of diagnosis maintenance system, comprising: diagnosis maintenance terminal, the USB-CAN conversion equipment be connected with described diagnosis maintenance terminal and the on-vehicle host be connected with described USB-CAN conversion equipment;
The response message that on-vehicle host is replied for responding user operation and the instruction that user inputs being sent to on-vehicle host, and is presented on diagnosis maintenance terminal interface by described diagnosis maintenance terminal, instructs user operation and facilitates user to check information;
Described USB-CAN conversion equipment realizes the protocol conversion of usb communication agreement and CAN communication agreement, for diagnosis maintenance terminal and on-vehicle host interaction data provide passage.
Described on-vehicle host is for receiving and responding the user instruction received;
USB is used to communicate between described diagnosis maintenance terminal with described USB-CAN conversion equipment;
CAN is used to communicate between described on-vehicle host with affiliated USB-CAN conversion equipment.
Preferably, described diagnosis maintenance terminal shows the instruction of user's transmission and the response message of on-vehicle host reply successively with event order of occurrence on interface;
Affiliated on-vehicle host is for correct user instruction, and on-vehicle host replys corresponding response message; For the user instruction of mistake, on-vehicle host replys miscue information, instructs user to select and inputs correct user instruction;
Preferably, described diagnosis maintenance terminal is enable or forbid diagnosis maintenance terminal interface related key, input frame according to user operation;
When user selects to on-vehicle host download configuration Parameter File, should forbid the fixed instruction button commonly used and general instruction input frame, prevent in download configuration Parameter File process, user error input instruction causes the failure of configuration parameter file download;
When user does not select to on-vehicle host download configuration Parameter File, answer enable conventional fixed instruction button and general instruction input frame, allow user to press conventional fixed instruction button and send fixed instruction to on-vehicle host, also allow user manually input arbitrary instruction at general instruction input frame and this instruction is sent to on-vehicle host.
Preferably, user can input arbitrary instruction by diagnosis maintenance terminal general instruction input frame, diagnosis maintenance terminal does not carry out validity check to the instruction of user's input, but instruction is passed through on-vehicle host, judges whether user instruction is effective and carry out corresponding reply by on-vehicle host;
In order to increase new user instruction, do not need to carry out any amendment to diagnosis maintenance terminal, only need increase the software logic that the instruction that Adds User is identified and responded in on-vehicle host, the instruction that user can be new according to new increase in demand, to improve the applicability of diagnosis maintenance terminal.
From above technical scheme, compared with prior art, the invention discloses a kind of communication means and the diagnosis maintenance system of diagnosing maintenance terminal and on-vehicle host.Diagnose maintenance terminal in the method after receiving the initiation command of on-vehicle host, start to send request frame to on-vehicle host.On-vehicle host, receiving multiple effective claim frame continuously, thinks that communication connection is successfully established, and sends comprise the idle frame that communication connection is successfully established information to diagnosis maintenance terminal.Diagnosis maintenance terminal receives and comprises communication connection and be successfully established the idle frame of information, thinks to be successfully established with the communication connection of on-vehicle host, thus realizes diagnosis maintenance terminal and be connected with the proper communication between on-vehicle host.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 shows a kind of precedence diagram diagnosing maintenance terminal and on-vehicle host to establish a communications link of the present invention;
Fig. 2 shows a kind of schematic diagram diagnosing maintenance terminal and on-vehicle host to transmit data of the present invention;
Fig. 3 shows a kind of maintenance terminal and on-vehicle host diagnosed of the present invention and keeps the schematic diagram communicated to connect;
Fig. 4 shows a kind of process using a diagnosis maintenance terminal amendment on-vehicle host configuration parameter of the present invention;
Fig. 5 shows the system construction drawing that a kind of on-vehicle host diagnosis of the present invention is safeguarded.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of precedence diagram diagnosing maintenance terminal and on-vehicle host to establish a communications link is shown see Fig. 1.
On-vehicle host sends to diagnosis maintenance terminal the idle frame carrying the order that starts to establish a communications link, and after diagnosis maintenance terminal receives this idle frame, start to send to the on-vehicle host cycle claim frame not carrying data, request and on-vehicle host establish a communications link.On-vehicle host receives three when effectively not carrying the claim frame of data continuously, thinks to establish a communications link successfully with diagnosis maintenance terminal, and sends to diagnosis maintenance terminal the idle frame carrying and communicate to connect and be successfully established.When diagnosis maintenance terminal receives the idle frame carrying and communicate to connect and be successfully established, think and to establish a communications link successfully with on-vehicle host.After this, maintenance terminal and on-vehicle host is diagnosed can to transmit data mutually.
Both sides all carry out validity check to the data received, and do not pass through, think and the broken communication connection of the other side, need re-establish communication connection if checked.
A kind of schematic diagram diagnosing maintenance terminal and on-vehicle host to transmit data of the present invention is shown see Fig. 2.
User is by the input of diagnosis maintenance terminal and send user instruction, and user instruction is sent to on-vehicle host with claim frame by diagnosis maintenance terminal.On-vehicle host receives user instruction, carries out validity check to user instruction.If user instruction is by validity check, on-vehicle host replys corresponding expectation information according to user instruction, and the expectation information diagnosed and interface display received is safeguarded in diagnosis.If user instruction is not by validity check, on-vehicle host replys miscue information according to type of error, and diagnosis maintenance terminal interface display miscue information, instructs user to perform correct instruction input.
Show a kind of maintenance terminal and on-vehicle host diagnosed of the present invention see Fig. 3 and keep the schematic diagram communicated to connect.Diagnosis maintenance terminal does not have data to send on-vehicle host, will send maintenance connect frame, to keep being connected with the proper communication of on-vehicle host with the fixed cycle to on-vehicle host.On-vehicle host do not have data send to diagnosis maintenance terminal time, will with specified period to diagnosis maintenance terminal send idle frame, with keep with diagnosis maintenance terminal proper communication be connected.If diagnosis maintenance terminal does not receive any valid data of on-vehicle host at the appointed time, or on-vehicle host does not receive any data of diagnosis maintenance terminal at the appointed time, then both sides all can think and the communication disruption of the other side, need reopen the process established a communications link.
A kind of process using a diagnosis maintenance terminal amendment on-vehicle host configuration parameter is shown see Fig. 4.On-vehicle host information, prompting user is from exiting, selecting amendment configuration parameter, select referring to configuration parameter descriptor, select to make a choice referring to configuration parameter currency etc.User inputs the parameter value of correct parameter name and mistake, on-vehicle host prompting customer parameter value mistake.User inputs correct parameter name and correct parameter value, on-vehicle host prompting user input parameter value again.User inputs identical parameter value again, and on-vehicle host prompting user configuration parameter is successfully modified.
As known from the above, user operation diagnosis maintenance terminal, diagnosis maintenance terminal responds user operation and user operation is converted to the data meeting communication protocol and sends to on-vehicle host, and on-vehicle host receives data and also from data, identifies user command.For correct user command, on-vehicle host performs corresponding response according to specific instructions content, and response results is converted to the data meeting communication protocol and send to diagnosis maintenance terminal, diagnosis maintenance terminal receives data and extracts the response results of on-vehicle host, response results is presented in time on the interface of diagnosis maintenance terminal, checks the response results of on-vehicle host to user command for user.For the user command of mistake, on-vehicle host identification error type also replys pointed information according to type of error, information is converted to the data meeting communication protocol and send to diagnosis maintenance terminal, diagnosis maintenance terminal receives data and extracts the information of on-vehicle host, information is presented in time on the interface of diagnosis maintenance terminal, prompting user input command is wrong, instructs user to perform correct operation.Relative to existing diagnosis maintaining method, support of the present invention is carried out diagnosis by CAN to domestic on-vehicle host and is safeguarded, supports extendible user instruction, improves the flexibility that diagnosis is safeguarded; Using the mode of question-response user instruction and on-vehicle host to be replied is presented on interface, is convenient to instruct user operation, is also convenient to user and checks interactive information.Use diagnosis maintenance terminal to revise configuration parameter to on-vehicle host, download application and trouble record that on-vehicle host stores, the system time of amendment on-vehicle host, improve and safeguard that on-vehicle host normally works and the efficiency of failure diagnosis.
The system construction drawing of a kind of on-vehicle host diagnosis of the present invention maintenance is shown see Fig. 5.
As shown in Figure 5, on-vehicle host diagnosis maintenance system comprises diagnosis maintenance terminal, USB-CAN conversion equipment and on-vehicle host.Diagnosis maintenance terminal and on-vehicle host are connected by USB-CAN conversion equipment.User is by the input of diagnosis maintenance terminal and send user instruction, on-vehicle host receives user instruction, identify user instruction and reply accordingly, the information that on-vehicle host is replied extracts and is presented on interface by diagnosis maintenance terminal, instructs user operation or shows the information expecting to see to user.
Described diagnosis maintenance terminal is enable or forbid diagnosis maintenance terminal interface related key, input frame according to user operation;
When user selects to on-vehicle host download configuration Parameter File, should forbid the fixed instruction button commonly used and general instruction input frame, prevent in download configuration Parameter File process, user error input instruction causes the failure of configuration parameter file download;
When user does not select to on-vehicle host download configuration Parameter File, answer enable conventional fixed instruction button and general instruction input frame, allow user to press conventional fixed instruction button and send fixed instruction to on-vehicle host, also allow user manually input arbitrary instruction at general instruction input frame and this instruction is sent to on-vehicle host.
Diagnosis maintenance terminal is connected with on-vehicle host by USB-CAN conversion equipment, and after diagnosis maintenance terminal and on-vehicle host set up normal communication connection, user sends instruction by diagnosis maintenance terminal to on-vehicle host, on-vehicle host response user instruction.For correct user instruction, reply corresponding data according to instruction, return information is presented on interface by diagnosis maintenance terminal.For the user instruction of mistake, on-vehicle host replys miscue information, and miscue information displaying on interface, instructs user to send correct user instruction by diagnosis maintenance terminal.User to on-vehicle host download configuration parameter, also can be downloaded the application and trouble information of on-vehicle host storage, can also be used for the system time revising on-vehicle host by diagnosis maintenance terminal from on-vehicle host.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the application.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. diagnose a communication means for maintenance terminal and on-vehicle host, it is characterized in that, comprise
Receive the initiation command that on-vehicle host issues, issue multiple claim frame continuously to on-vehicle host;
Receive on-vehicle host to the idle frame of the feedback of described multiple claim frame, described idle frame comprises communication connection and is successfully established information;
Determine with the communication connection of described on-vehicle host normal, to receive the Frame that on-vehicle host issues.
2. communication means according to claim 1, is characterized in that, describedly determines with the communication connection of described on-vehicle host normal, also comprises afterwards:
When needing when there is no user instruction to send to on-vehicle host, regularly sending to on-vehicle host and keeping connecting frame, to keep being connected with the proper communication of on-vehicle host.
3. communication means according to claim 1, is characterized in that, the Frame that described reception on-vehicle host issues, and also comprises afterwards:
The Frame received effectively is checked, if check result is abnormal, then confirms to disconnect with the communication connection of described on-vehicle host, re-establish communication connection;
Wherein, described effective inspection comprises data type inspection, data length inspection, timestamp inspection and CRC check.
4. diagnose a communication means for maintenance terminal and on-vehicle host, it is characterized in that, comprising:
Issue sign on to diagnosis maintenance terminal, receive multiple claim frames that diagnosis maintenance terminal sends;
Judge multiple claim frames of receiving whether continuously and as effective claim frame, if then determine with the communication connection of described diagnosis maintenance terminal normal;
Issue to described diagnosis maintenance terminal and comprise the idle frame that communication connection is successfully established information, and accept the claim frame comprising user instruction of diagnosis maintenance terminal transmission.
5. communication means according to claim 4, is characterized in that, described issuing to described diagnosis maintenance terminal comprises the idle frame that communication connection is successfully established information, also comprises afterwards:
When needing when there being data to be sent to described diagnosis maintenance terminal, send the data to diagnosis maintenance terminal by Frame;
When needing when there is no data to be sent to affiliated diagnosis maintenance terminal, regularly send idle frame, to keep being connected with the proper communication of affiliated diagnosis maintenance terminal to diagnosis maintenance terminal.
6. communication means according to claim 4, is characterized in that, the described claim frame comprising user instruction accepting diagnosis maintenance terminal and send, also comprises afterwards:
The claim frame received effectively is checked, if check result is abnormal, then confirms to disconnect with the communication connection of described on-vehicle host, re-establish communication connection;
Wherein, described effective inspection comprises data type inspection, data length inspection, timestamp inspection CRC check.
7. diagnose a maintenance system, it is characterized in that, comprising: diagnosis maintenance terminal, the USB-CAN conversion equipment be connected with described diagnosis maintenance terminal and the on-vehicle host be connected with described USB-CAN conversion equipment;
The response message that on-vehicle host is replied for responding user operation and the instruction that user inputs being sent to on-vehicle host, and is presented on diagnosis maintenance terminal interface by described diagnosis maintenance terminal, instructs user operation and facilitates user to check information;
Described USB-CAN conversion equipment realizes the protocol conversion of usb communication agreement and CAN communication agreement, for diagnosis maintenance terminal and on-vehicle host interaction data provide passage;
Described on-vehicle host is for receiving and responding the user instruction received;
USB is used to communicate between described diagnosis maintenance terminal with described USB-CAN conversion equipment;
CAN is used to communicate between described on-vehicle host with affiliated USB-CAN conversion equipment.
8. system according to claim 7, is characterized in that,
Described diagnosis maintenance terminal shows the instruction of user's transmission and the response message of on-vehicle host reply successively with event order of occurrence on interface;
Affiliated on-vehicle host is for correct user instruction, and on-vehicle host replys corresponding response message; For the user instruction of mistake, on-vehicle host replys miscue information, instructs user to select and inputs correct user instruction.
9. system according to claim 7, is characterized in that,
Described diagnosis maintenance terminal is enable or forbid diagnosis maintenance terminal interface related key, input frame according to user operation;
When user selects to on-vehicle host download configuration Parameter File, should forbid the fixed instruction button commonly used and general instruction input frame, prevent in download configuration Parameter File process, user error input instruction causes the failure of configuration parameter file download;
When user does not select to on-vehicle host download configuration Parameter File, answer enable conventional fixed instruction button and general instruction input frame, allow user to press conventional fixed instruction button and send fixed instruction to on-vehicle host, also allow user manually input arbitrary instruction at general instruction input frame and this instruction is sent to on-vehicle host.
10. system according to claim 7, is characterized in that,
User can input arbitrary instruction by diagnosis maintenance terminal general instruction input frame, diagnosis maintenance terminal does not carry out validity check to the instruction of user's input, but instruction is passed through on-vehicle host, judge that whether effectively and carry out corresponding reply user instruction by on-vehicle host;
In order to increase new user instruction, do not need to carry out any amendment to diagnosis maintenance terminal, only need increase the software logic that the instruction that Adds User is identified and responded in on-vehicle host, the instruction that user can be new according to new increase in demand, to improve the applicability of diagnosis maintenance terminal.
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