CN103902746B - DTC, data flow and the method for freezing frame data preservation and playback - Google Patents
DTC, data flow and the method for freezing frame data preservation and playback Download PDFInfo
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Abstract
The present invention relates to a kind of DTC, data flow and freeze frame data preserve and playback method.This method includes：Step 10, by DTC, data flow and freeze frame data record in the data field of memory；Step 20, by DTC, data flow and freeze index area of the index record in the memory of frame data；Step 30, the initial address of the index area and the initial address of the data field are recorded in the public area of the memory when next time is recorded；When step 40, playback, search the index area accordingly to read the data in the data field.DTC, data flow and the method for freezing frame data preservation and playback of the present invention, by DTC, data flow, the substantial amounts of data of freeze frame record, the data that professional person and car owner can reasonably analyze automobile judge the use state and diagnosis problem of automobile, obtain the analysis of specialty.
Description
Technical field
The present invention relates to automobile diagnosis technique, more particularly to a kind of DTC of automotive diagnostic installation, data flow and freeze
The method that frame data are preserved and played back.
Background technology
On existing automotive diagnostic installation, diagnostic function is all very perfect, can detect and read automobile very in real time
The related information of many diagnosis, including onboard diagnostic system（OBD）The specific data of data and the various vehicles of correspondence, such as failure
Code（DTC）, data flow（STR）, freeze frame（FRZ）、VIN（Vehicle Identification Number, vehicle identification code）
The data such as code, also have some equipment to carry specific function, such as Motor Maintenance lamp zero, the setting of Motor Maintenance cycle, automobile are stopped
Car piece is reset, steering angle sensor is calibrated etc., and these are all automotive diagnostic installation and automobile communication networked realtime communication and data
Collect, still, the application scenario for being difficult to meet the substantial amounts of data of some needs and ex-post analysis is preserved without data.
The content of the invention
Therefore, it is an object of the invention to provide a kind of DTC, data flow and freeze frame data preserve and playback side
Method, allows to automotive diagnostic installation diagnosing the DTC for detecting automobile, data flow, freeze frame preservation on a memory, so
The data of the DTC detected, data flow, freeze frame are played back afterwards.
To achieve the above object, the present invention provides a kind of DTC, data flow and freezes the side that frame data are preserved and played back
Method, including：
Step 10, by DTC, data flow and freeze frame data record in the data field of memory；
Step 20, by DTC, data flow and freeze index area of the index record in the memory of frame data；
Step 30, by next time record when the initial address of the index area and the initial address of the data field be recorded in the storage
The public area of device；It is easy to memory to be quickly found out corresponding address when carrying out data record and index record, and conveniently judges space
It is whether full to prevent from overflowing, so as to be adapted to DTC, data flow and freeze the continuous preservation of frame data；
When step 40, playback, search the index area accordingly to read the data in the data field.
Wherein, the data format of the public area of the memory includes the index address unit of record next time, what next time recorded
Data address unit and the storage mark unit for distinguishing index object.
Wherein, the index address unit includes high address unit and low address unit.
Wherein, the data address unit includes high address unit and low address unit.
Wherein, the data format of the index area of the memory includes the unit of the protocol type of record institute index data, note
Record the unit of the unit of the initial address of institute's index data and the data length of record institute index data.
Wherein, the data format of the data field of the memory includes the section of record OBD DTCs, record OBD DTCs
Section include the unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record DTC
Several units, records the unit of failure code type and record DTC ID unit.
Wherein, the data format of the data field of the memory includes the section of record single-type DTC, the record single-type
The section of DTC includes the unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record
The unit in vehicle vehicle path, records the unit of DTC data packet length, records the unit of package counting facility, record Packet type
Unit and the unit for recording specific data.
Wherein, the data format of the data field of the memory includes the section of record OBD data flows, record OBD data flows
Section include the unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record data frame
Several units, the unit of record data stream ID and the unit of record data flow descriptors.
Wherein, the data format of the data field of the memory includes the section of record model data stream, the record single-type
The section of data flow includes the unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record
The unit in vehicle vehicle path, the unit of record data frame number, the unit of record data stream data packet length, record bag is counted
The unit of device, records the unit of Packet type and records the unit of specific data.
Wherein, the data format of the data field of the memory includes the section of record OBD freeze frames, record OBD freeze frames
Section include the unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record freeze frame
Several units, record freeze frame ID unit, memory record freezes the unit of frame descriptor.
To sum up, DTC of the invention, data flow and freeze frame data preserve and playback method, can be by vehicle diagnosis
The device diagnostic detection DTC of automobile, data flow, freeze frame are preserved on a memory, then play back detect DTC,
Data flow, the data of freeze frame；By DTC, data flow, the substantial amounts of data of freeze frame record, professional person and car owner's energy
The data of enough rational analysis automobiles judge the use state and diagnosis problem of automobile, obtain the analysis of specialty.
Brief description of the drawings
Below in conjunction with the accompanying drawings, it is described in detail by the embodiment to the present invention, technical scheme will be made
And other beneficial effects are apparent.
In accompanying drawing,
Fig. 1 is DTC of the present invention, data flow and freezes the flow chart for the method that frame data are preserved and played back.
Embodiment
Referring to Fig. 1, it is DTC of the present invention, data flow and freezes the flow chart for the method that frame data are preserved and played back,
Including：
Step 10, by DTC, data flow and freeze frame data record in the data field of memory；Can be according to data field
Initial address find corresponding address and recorded；
Step 20, by DTC, data flow and freeze index area of the index record in the memory of frame data；Can root
Corresponding address is found according to the initial address of index area to be recorded；
Step 30, by next time record when the initial address of the index area and the initial address of the data field be recorded in the storage
The public area of device；It is easy to memory to be quickly found out corresponding address when carrying out data record and index record, and conveniently judges space
It is whether full to prevent from overflowing, so as to be adapted to DTC, data flow and freeze the continuous preservation of frame data；
When step 40, playback, search the index area accordingly to read the data in the data field.
As shown in table 1 below, the data format of the public area of the memory can include the index address unit of record next time,
The data address unit that next time records and the storage mark unit for distinguishing index object；Index address and data address can
Think the form of high address plus low address, index address unit and data address unit can include high address unit and low address
Unit.
Table 1：Public area data format example
Wherein, the unit of bracket inner digital is byte, represents identical with this in corresponding data length, following description；
Record once needs 30 bytes altogether.
Such as table 2 below, shown in table 3 and table 4, the data format of the index area of the memory can include record institute index data
Protocol type unit, the unit of the initial address of record institute index data and the data length of record institute index data
Unit.For the single-type data of OBD data and a certain specific vehicle of correspondence, the index area data lattice of OBD and single-type
Formula can use the form of table 2, table 3 and table 4.
Table 2：DTC index record data format examples
Record is once 10 bytes.
Table 3：STR index record data format examples
Record is once 10 bytes.
Table 4：FRZ index record data format examples
Record is once 10 bytes.
As shown in table 5 below, the data format of the data field of the memory can include the section of record OBD DTCs, the note
The section of record OBD DTCs can include the unit of record protocol type, the unit of logging timestamp, the list of registration of vehicle identification code
Member, records the unit of DTC number, records the unit of failure code type and record DTC ID unit.
Table 5：OBD DTC Data Area data format samples
As shown in table 6 below, the data format of the data field of the memory can include the section of record single-type DTC, should
The section of record single-type DTC can include the unit of record protocol type, the unit of logging timestamp, registration of vehicle identification
The unit of code, the unit in record single-type vehicle path, records the unit of DTC data packet length, records the list of package counting facility
Member, records the unit of Packet type and records the unit of specific data.The unit for recording single-type vehicle path can be for area
Divide different specific vehicles.
Table 6：Single-type DTC data format examples
Wherein, the unit of the record specific data of DTC can be as shown in table 7 below or table 8：
Table 7：The data format example of the specific data of single-type DTC
Table 8：The data format example of the specific data of single-type DTC
As shown in table 9 below, the data format of the data field of the memory can include the section of record OBD data flows, the note
The section of record OBD data flows can include the unit of record protocol type, the unit of logging timestamp, the list of registration of vehicle identification code
Member, the unit of record data frame number, the unit of record data stream ID and the unit of record data flow descriptors.
Table 9：OBD STR Data Area data format samples
As shown in table 10 below, the data format of the data field of the memory can include the section of record model data stream,
The section of the record model data stream can include the unit of record protocol type, and the unit of logging timestamp, registration of vehicle is known
The unit of other code, the unit in record single-type vehicle path, the unit of record data frame number, record data stream data packet length
Unit, record the unit of package counting facility, record the unit of Packet type and record the units of specific data.
Table 10：Single-type STR Data Area data format samples
The unit for recording the specific data of STR can be as shown in table 11 below or table 12.
Table 11：The data format example of the specific data of STR
Table 12：The data format example of the specific data of STR
As shown in table 13 below, the data format of the data field of the memory can include the section of record OBD freeze frames, the note
The section of record OBD freeze frames can include the unit of record protocol type, the unit of logging timestamp, the list of registration of vehicle identification code
Member, records the unit of freeze frame number, and record freeze frame ID unit, memory record freezes the unit of frame descriptor.
Table 13：OBD FRZ data format example
During using the present invention, the preservation just recorded if diagnostic device open record pattern according to form as above,
The data of first step recorded data zone, can find corresponding address according to the initial address of data field and be recorded；Second step is remembered
Record the data of index area, i.e. the protocol type of recorded data zone, initial address and data length can be according to the startings of index area
Find corresponding address and recorded in address；3rd step records the data of public area, that is, the index area of secondary record rises under updating
Beginning address and data field initial address, and judge whether space full, is easy to memory to carry out data record and index record
When be quickly found out corresponding address, and it is convenient judge whether space full to prevent spilling so that be adapted to DTC, data flow and
Freeze the continuous preservation of frame data；4th step, searches reading and display that index address carries out data when playback.
To sum up, DTC of the invention, data flow and freeze frame data preserve and playback method, can be by vehicle diagnosis
The device diagnostic detection DTC of automobile, data flow, freeze frame are preserved on a memory, then play back detect DTC,
Data flow, the data of freeze frame；By DTC, data flow, the substantial amounts of data of freeze frame record, professional person and car owner's energy
The data of enough rational analysis automobiles judge the use state and diagnosis problem of automobile, obtain the analysis of specialty.
It is described above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the invention
It is required that protection domain.
Claims (10)
1. a kind of DTC, data flow and the method for freezing frame data preservation and playback, it is characterised in that including：
Step 10, by DTC, data flow and freeze frame data record in the data field of memory；
Step 20, by DTC, data flow and freeze index area of the index record in the memory of frame data；
Step 30, by next time record when the initial address of the index area and the initial address of the data field be recorded in the memory
Public area；
When step 40, playback, search the index area accordingly to read the data in the data field.
2. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the public area of the memory include next time record index address unit, next time record data address unit with
And for distinguishing the storage mark unit of index object.
3. DTC as claimed in claim 2, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The index address unit includes high address unit and low address unit.
4. DTC as claimed in claim 2, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data address unit includes high address unit and low address unit.
5. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the index area of the memory includes the unit of the protocol type of record institute index data, record institute index data
The unit of the unit of initial address and the data length of record institute index data.
6. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the data field of the memory includes the section of record OBD DTCs, and the section of record OBD DTCs includes record and assisted
The unit of type is discussed, the unit of logging timestamp, the unit of registration of vehicle identification code records the unit of DTC number, record
The unit of failure code type and record DTC ID unit.
7. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the data field of the memory includes the section of record single-type DTC, and the section of the record single-type DTC includes
The unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record single-type vehicle path
Unit, records the unit of DTC data packet length, records the unit of package counting facility, records the unit and record tool of Packet type
The unit of volume data.
8. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the data field of the memory includes the section of record OBD data flows, and the section of record OBD data flows includes record and assisted
Discuss the unit of type, the unit of logging timestamp, the unit of registration of vehicle identification code, the unit of record data frame number, record
Data flow ID unit and the unit of record data flow descriptors.
9. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the data field of the memory includes the section of record model data stream, and the section of the record model data stream includes
The unit of record protocol type, the unit of logging timestamp, the unit of registration of vehicle identification code, record single-type vehicle path
Unit, the unit of record data frame number, the unit of record data stream data packet length records the unit of package counting facility, record
The unit of Packet type and the unit for recording specific data.
10. DTC as claimed in claim 1, data flow and the method for freezing frame data preservation and playback, it is characterised in that
The data format of the data field of the memory includes the section of record OBD freeze frames, and the section of record OBD freeze frames includes record and assisted
The unit of type is discussed, the unit of logging timestamp, the unit of registration of vehicle identification code records the unit of freeze frame number, record
Freeze frame ID unit, memory record freezes the unit of frame descriptor.
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