CN103489301A - Vehicle running information acquisition system and method using dual-processor architecture - Google Patents
Vehicle running information acquisition system and method using dual-processor architecture Download PDFInfo
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Abstract
The invention discloses a vehicle running information acquisition system and method using a dual-processor architecture. The system comprises a data acquisition unit, a temporary cache unit and a control unit which are connected one another, wherein the data acquisition unit is used for acquiring vehicle running information data in real time and sending the vehicle running information data to the temporary cache unit or the control unit; the temporary cache unit is used for receiving and storing the vehicle running information data acquired by the data acquisition unit in a system starting process and sending the stored data to the control unit after an operating system is started successfully; the control unit is used for receiving and processing the vehicle running information data sent from the data acquisition unit and the temporary cache unit. According to the system, two processors capable of communicating with each other are used, a data acquisition function is independent, a special controller is in charge of real-time data acquisition, the temporary cache unit is configured, and all the vehicle running information data are acquired when the system is started and the controller has other inserted tasks.
Description
Technical field
The present invention relates to the vehicle technology field, relate in particular to a kind of vehicle operating information acquisition system and method for dual processor framework.
Background technology
The vehicle operating information acquisition system gets off to be stored in this locality by the various useful signal data acquisitions that produce in the vehicle operating process, or is back to service centre by wireless network, to monitor for vehicle operation data analysis or travel condition of vehicle.
Because the vehicle operating environment often changes, this real-time data acquisition system not only needs to have the good running status under harsh operating mode, also needs to guarantee the ageing and system reliability of data acquisition under emergency situations.
Usually, the problem that there will be data to leak in acquisition system electrifying startup process to adopt, for example two kinds of situations once: the first, the vehicle real time acquisition system is the system of a multithreading, multitask, not only to carry out data acquisition, compression, encapsulation, storage etc., also need to carry out mutual with backstage.Thereby the design of the steering logic of this acquisition system is very complicated.If the steering logic design is improper, when carrying out data acquisition, probably because of the insertion of other tasks, cause gathering interruption or losing real-time; The second, in acquisition system electrifying startup process, there will be data to leak the problem of adopting.The data that some leakage is adopted are often very important.During to the vehicle operating information acquisition, suppose that acquisition system starts 5s consuming time left and right, if now vehicle also just starts, during this period of time, the driver fully likely carries out some operation to vehicle, as the operation of car door/window opening and closing, entertainment systems etc.The leakage of these data is adopted on vehicle component, the analysis in serviceable life makes a significant impact.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of dual processor framework that is applied to the vehicle operating information acquisition system, can real-time data acquisition system, not only need to guarantee the good running status under harsh operating mode, can also guarantee the ageing and system reliability of data acquisition under emergency situations.
In order to solve the problems of the technologies described above technical scheme of the present invention, be: a kind of vehicle operating information acquisition system of dual processor framework comprises the data acquisition unit be connected with each other, interim buffer unit and control module; Data acquisition unit, for Real-time Collection vehicle operating information data, before electric back operation system starts successfully, the data of collection are sent to interim buffer unit, after the os starting success, data acquisition unit directly is sent to control module according to the instruction of control module by the data of collection; Interim buffer unit, the os starting process vehicle operating information data gathered for receiving and store data acquisition unit is sent to control module by the data of storage after the os starting success; Control module, the vehicle operating information data sended over for receive data acquisition unit and interim buffer unit after the os starting success, and data are processed, the vehicle operating information data that the normal reception data acquisition unit in service of operating system sends over, and data are processed.
Preferably, data acquisition unit is connected with sensor assembly with the bus communication module, the vehicle operating information data that data acquisition bus communication module and sensor assembly send.
Preferably, data acquisition unit comprises built-in buffer, the vehicle operating information data sended over from bus communication module and sensor assembly for storage, data acquisition unit reads the vehicle operating information data of storing in buffer with fixed frequency, system is sent to interim buffer unit by read vehicle operating information data before starting successfully, and the vehicle operating information data that system just read after starting successfully directly is sent to data acquisition unit.
Preferably, data acquisition unit also comprises built-in crystal oscillator checker, for eliminating the error on data acquisition time.
Preferably, data acquisition unit comprises from the MCU controller of bus communication module and sensor assembly collection vehicle operation information data, and interim buffer unit comprises ferroelectric memory, and control module comprises the CPU processor.
Preferably, the profile information that interim buffer unit storage control unit sends over, when control module starts in system, whether reading configuration file information inspection are new configuration needs, if control module sends to data acquisition unit by new configuration information file, by data acquisition unit, according to new profile information, carry out data acquisition.
Another technical scheme of the present invention has been to provide a kind of vehicle operating information collecting method of dual processor framework, comprise the following steps: (1) system obtains before electric back operation system starts successfully, by data acquisition unit Real-time Collection vehicle operating information data, and institute's image data is sent to interim buffer unit; (2) after system starts successfully, interim buffer unit is sent to control module by stored data, and data acquisition unit also directly is sent to control module according to the instruction Real-time Collection vehicle operation data of control module simultaneously; Control module is processed in real time to the vehicle operating information data received from interim buffer unit and data acquisition unit; (3), when system is normally moved, data acquisition unit also directly is sent to control module according to the instruction Real-time Collection vehicle operation data of control module, by control module, the vehicle operating information data collected from interim buffer unit is processed in real time.
Preferably, data acquisition unit, by the interior crystal oscillator checker of establishing, regularly carries out the crystal oscillator verification, to eliminate the error on data acquisition time.
Preferably, when system need to redefine the profile information of the vehicle operating information data type of required collection and frequency acquisition, control module is stored in interim buffer unit by profile information, the control module reading configuration file information also checks whether be new configuration needs, if control module redefines acquisition configuration according to new profile information.
Preferably, profile information comprises vehicle operating information data type, data length and the frequency acquisition that needs gather.
Beneficial effect of the present invention is: used two processors that can intercom mutually, data acquisition unit is specifically designed to the collection of signal, control module carries out data encapsulation, compression, storage, configuration file parsing, data transmission etc., and is responsible for carrying out man-machine interaction.Be responsible for real time data acquisition by special controller by data acquisition function is independent, and set up interim buffer unit, when the assurance system starts and controller while having other tasks to insert, do not have the vehicle operating information data and adopted by leakage.Three unit in this framework intercom mutually, realize real time data acquisition, storage and the function of PERCOM peripheral communication on a small quantity.The present invention can be applied to vehicle operating information acquisition and running state monitoring.Simple in structure, easy enforcement, cost are low, can guarantee the ageing and integrality of data acquisition.Bottom data collection and upper strata operating system are separate, system stability.Applicable to various complicated operating conditions, acquisition strategies is adjustable, flexibly easily change.
The accompanying drawing explanation
The structural representation that Fig. 1 is the embodiment of the present invention
Fig. 2 is data flow schematic diagram in embodiment of the present invention system starting process
Data flow schematic diagram when Fig. 3 is the success of embodiment of the present invention system starting process
Fig. 4 is that the normal runtime data of embodiment of the present invention system flows to schematic diagram
In figure: 1, CPU processor 2, MCU controller 3, ferroelectric memory 4, buffer 5, bus communication module 6, sensor communication module 7, memory module 8, wireline interface module 9, power management module 10,3G communication module
Embodiment
For the present invention is become apparent, with preferred embodiment, also be described in detail below by reference to the accompanying drawings.
The invention provides a kind of vehicle operating information acquisition system of dual processor framework, comprise data acquisition unit, interim buffer unit and control module.
Data acquisition unit adopts MCU controller 2 to realize in the present embodiment, interim buffer unit employing ferroelectric memory 3 is realized, control module adopts CPU processor 1 to realize.
As shown in Figure 1, MCU controller 2, ferroelectric memory 3 and CPU processor 1 are connected each other in twos, are two-way communication.
The built-in crystal oscillator checker of MCU controller 2, for eliminating the error on data acquisition time.
The profile information that ferroelectric memory 3 storage CPU processors 1 send over, comprise vehicle operating information data type, data length and frequency acquisition that needs gather.When CPU processor 1 starts in system, whether reading configuration file information inspection are new configuration needs, if CPU processor 1 sends to MCU controller 2 by new configuration information file, by MCU controller 2, according to new profile information, redefine acquisition configuration.
The workflow of the vehicle operating information acquisition system of above-mentioned dual processor framework is:
The driver reverses engine key into the car powers on vehicle, and native system obtains power supply immediately, and operating system starts automatically.
As shown in Figure 2, now on vehicle bus communication module 5 and sensor communication module 6, have message transmissions, before the os starting success, MCU controller 2 gathers demand according to the instruction picked up signal of CPU processor 1, and according to frequency acquisition reading out data from built-in buffer 4, instant packing, by with ferroelectric memory 3 between communicate by letter, data are sent to storage on ferroelectric memory 3.
After a period of time, in common 10 seconds, native system has started, between CPU processor 1 and MCU controller 2 and the connection setup between ferroelectric memory 3 success.
As shown in Figure 3, after system starts successfully, MCU controller 2 is abandoned the control to ferroelectric memory 3, and by the data packet delivery of Real-time Collection to CPU processor 1.CPU processor 1 on one side and MCU controller 2 communications reception real time data bags, on one side the packet temporarily deposited with ferroelectric memory 3 communications reception the unloading phase.Ferroelectric memory 3 ends task after having transmitted all packets of temporarily depositing.
As shown in Figure 4, system starts normal operation period, MCU controller 2 reads the collection signal data according to the mode with same before from built-in buffer 4, according to the instruction of CPU processor 1, data are sent to CPU processor 1, the data category now gathered comprises vehicle bus data and sensing data.
During system works, MCU controller 2 carries out a crystal oscillator verification at set intervals, to eliminate the error on data acquisition time.CPU processor 1 receives the packet that MCU controller 2 transmits, and verification succeeds is afterwards sequentially by its data writing file; On the data file timestamp, CPU processor 1 writes the absolute time of every frame data when collected successively according to 2 sampling periods of MCU controller.
The present invention is by MCU controller 2, independent the task of image data, has guaranteed the real-time of data acquisition and the consistance in the time interval.When CPU processor 1 written document, even if task is interrupted, also can not affect the result of data file, because the Frame gathered and each frame of time shaft are that relation is corresponding in order, broken away from absolute time.
After data file reaches the size of configuration file appointment, CPU processor 1 is by its compression and encapsulation, and the name of file is as the criterion with the first frame time write.Packaged data file is stored in transferring to memory module 7, and is uploaded in real time the background service center by 3G communication module 10 immediately.The Transmission caused because network signal is bad, the control module of CPU processor 1 is according to the breakpoint transmission rule treatments.
When the order that will upgrade wanted collection signal and frequency, CPU processor 1 receives new configuration order and new configuration file by wired or wireless mode, and configuration information is stored in ferroelectric memory 3; When system starts, at first CPU processor 1 reads configuration information and also checks whether be new configuration needs from ferroelectric memory 3, if new configuration needs, CPU processor 1 sends to MCU controller 2 to redefine acquisition configuration new configuration file, configured rear system and restarted, configuration take-effective.
The present invention has used two processors that can intercom mutually, and MCU controller 2 is mainly used in the collection of signal, and CPU processor 1 carries out data encapsulation, compression, storage, configuration file parsing, data transmission etc.CPU processor 1 is equipped with operating system, can carry out man-machine interaction.In addition, between two processors, also arranged small data storage cell---ferroelectric memory 3, a small amount of signal data collected for depositing the acquisition system start-up course.Three unit in this framework intercom mutually, realize real time data acquisition, storage and the function of PERCOM peripheral communication on a small quantity.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. the vehicle operating information acquisition system of a dual processor framework, is characterized in that: comprise the data acquisition unit be connected with each other, interim buffer unit and control module;
Data acquisition unit, for Real-time Collection vehicle operating information data, before electric back operation system starts successfully, the data of collection are sent to interim buffer unit, after the os starting success, data acquisition unit directly is sent to control module according to the instruction of control module by the data of collection;
Interim buffer unit, the os starting process vehicle operating information data gathered for receiving and store data acquisition unit is sent to control module by the data of storage after the os starting success;
Control module, the vehicle operating information data sended over for receive data acquisition unit and interim buffer unit after the os starting success, and data are processed, the vehicle operating information data that the normal reception data acquisition unit in service of operating system sends over, and data are processed.
2. the vehicle operating information acquisition system of a kind of dual processor framework according to claim 1, it is characterized in that: data acquisition unit is connected with sensor assembly with the bus communication module, the vehicle operating information data that data acquisition bus communication module and sensor assembly send.
3. the vehicle operating information acquisition system of a kind of dual processor framework according to claim 1, it is characterized in that: data acquisition unit comprises built-in buffer, the vehicle operating information data received from bus communication module and sensor assembly for storage, data acquisition unit reads the vehicle operating information data of storing in built-in buffer with fixed frequency, system is sent to interim buffer unit by read vehicle operating information data before starting successfully, the vehicle operating information data that system just read after starting successfully directly is sent to data acquisition unit.
4. the vehicle operating information acquisition system of a kind of dual processor framework according to claim 1, it is characterized in that: data acquisition unit also comprises built-in crystal oscillator checker, for eliminating the error on data acquisition time.
5. the vehicle operating information acquisition system of a kind of dual processor framework according to claim 1, it is characterized in that: data acquisition unit comprises from the MCU controller of bus communication module and sensor assembly collection vehicle operation information data, interim buffer unit comprises ferroelectric memory, and control module comprises the CPU processor.
6. the vehicle operating information acquisition system of a kind of dual processor framework according to claim 1, it is characterized in that: the profile information that interim buffer unit storage control unit sends over, when control module starts in system, whether reading configuration file information inspection are new configuration needs, if control module sends to data acquisition unit by new configuration information file, by data acquisition unit, according to new profile information, redefine acquisition configuration.
7. the vehicle operating information collecting method of a dual processor framework is characterized in that comprising the following steps:
(1) system obtains before electric back operation system starts successfully, by data acquisition unit Real-time Collection vehicle operating information data, and institute's image data is sent to interim buffer unit;
(2) after system starts successfully, interim buffer unit is sent to control module by stored data, and data acquisition unit also directly is sent to control module according to the instruction Real-time Collection vehicle operation data of control module simultaneously; Control module is processed in real time to the vehicle operating information data received from interim buffer unit and data acquisition unit;
(3), when system is normally moved, data acquisition unit also directly is sent to control module according to the instruction Real-time Collection vehicle operation data of control module, by control module, the vehicle operating information data collected from interim buffer unit is processed in real time.
8. the vehicle operating information collecting method of a kind of dual processor framework as claimed in claim 7 is characterized in that: data acquisition unit, by the interior crystal oscillator checker of establishing, regularly carries out the crystal oscillator verification, to eliminate the error on data acquisition time.
9. the vehicle operating information collecting method of a kind of dual processor framework as claimed in claim 7, system it is characterized in that: when need to redefine the profile information of the vehicle operating information data type of required collection and frequency acquisition, control module is stored in interim buffer unit by profile information, the control module reading configuration file information also checks whether be new configuration needs, if control module redefines acquisition configuration according to new profile information.
10. the vehicle operating information collecting method of a kind of dual processor framework according to claim 9 is characterized in that: profile information comprises vehicle operating information data type, data length and the frequency acquisition that needs gather.
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| CN108319251A (en) * | 2017-12-29 | 2018-07-24 | 中车唐山机车车辆有限公司 | Train data acquisition method and device |
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Application publication date: 20140101 |