CN113347279A - Method and system for transmitting vehicle driving data - Google Patents
Method and system for transmitting vehicle driving data Download PDFInfo
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- CN113347279A CN113347279A CN202110905615.9A CN202110905615A CN113347279A CN 113347279 A CN113347279 A CN 113347279A CN 202110905615 A CN202110905615 A CN 202110905615A CN 113347279 A CN113347279 A CN 113347279A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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Abstract
The invention relates to the field of data transmission, in particular to a method and a system for transmitting vehicle running data, wherein the method comprises the following steps: the cloud platform sends a historical data calling instruction to the collector; the collector responds to the historical data calling instruction and detects the current state of the vehicle, wherein the state comprises an alarm state and an operation state; the collector determines the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state; the collector sends a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency; the embodiment meets the service requirement of the cloud platform on data through diversified data packets and sending modes.
Description
Technical Field
The invention relates to the field of data transmission, in particular to a method and a system for transmitting vehicle driving data.
Background
In the vehicle driving process, in order to monitor the driving state of the vehicle, the vehicle is often required to upload driving data to a cloud platform in real time, so that the cloud platform analyzes the data and applies services.
With the gradual increase of cloud platform services, the requirements on driving data are higher and higher, and the current real-time uploading mode cannot meet the service requirements. In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The embodiment of the invention provides a vehicle driving data transmission method and system, which meet the service requirements of a cloud platform on data through diversified data packets and transmission modes.
In a first aspect, the present invention provides a method for transmitting vehicle driving data, where the method is applied to a system for transmitting vehicle driving data, the system includes a collector and a cloud platform, and the method includes:
the cloud platform sends a historical data calling instruction to the collector;
the collector responds to the historical data calling instruction and detects the current state of the vehicle, wherein the state comprises an alarm state and an operation state;
the collector determines the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state;
the collector sends a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency;
the alarm data packet is obtained by packaging vehicle running data in an alarm state, the normal data packet is obtained by packaging vehicle running data in an operation state, and the historical data packet is obtained by packaging historical data determined according to the historical data calling instruction.
In a second aspect, the present invention is directed to a transmission system of vehicle travel data, comprising: a collector and a cloud platform;
the cloud platform is used for sending a historical data calling instruction to the collector;
the collector is used for responding to the historical data calling instruction and detecting the current state of the vehicle, wherein the state comprises an alarm state and an operation state;
the collector is used for determining the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state;
the collector is used for sending a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency;
the alarm data packet is obtained by packaging vehicle running data in an alarm state, the normal data packet is obtained by packaging vehicle running data in an operation state, and the historical data packet is obtained by packaging historical data determined according to the historical data calling instruction.
Compared with the prior art, the invention has the beneficial effects that:
the cloud platform in this embodiment may send a historical data calling instruction to the collector, so that data required by a service is automatically acquired in a network transmission manner; the data packets uploaded by the collector comprise normal data packets, historical data packets and alarm data packets, so that the vehicle driving data are divided and then provided to the cloud platform, and classified transmission is realized; moreover, the collector can determine the sending opportunity and frequency of different types of data according to the current state of the vehicle, and the alarm data packet is sent preferentially with the highest frequency, so that the safety of the vehicle is ensured; the normal data packet and the historical data packet are transmitted in a cross and synchronous mode, the instantaneity requirements of the normal data packet and the historical data packet are considered, and data required by services can be provided for the cloud platform in time. The embodiment meets the service requirement of the cloud platform on data through diversified data packets and sending modes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for transmitting vehicle driving data according to an embodiment of the present invention;
fig. 2 is a block diagram of a transmission system of vehicle driving data according to an embodiment of the present invention;
fig. 3 is a flowchart of another method for transmitting vehicle driving data according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a flowchart of a method for transmitting vehicle driving data according to an embodiment of the present invention, where the method is applied to a system for transmitting vehicle driving data. Fig. 2 is a structural diagram of a transmission system of vehicle driving data according to an embodiment of the present invention. The system comprises a collector and a cloud platform. The collector collects and records vehicle driving data in real time, and uploads the vehicle driving data to the cloud platform at the same time. And the cloud platform processes and applies the received vehicle running data.
As shown in fig. 2, the collector includes: the device comprises a processor, a memory connected with the processor, a network module and an input module. The input module includes, but is not limited to, a vehicle signal input module, an electric brake controller module, a collector configuration tool, an automobile active safety (AEB) module controller, a camera, a Controller Area Network (CAN) controller, and a positioning module. The vehicle signal input module, the electric brake controller module, the collector configuration tool, the automobile active safety (AEB) module controller, the camera, the vehicle Controller Area Network (CAN) controller are connected with the processor through the CAN, the positioning module, the network module and the processor are connected through a Universal Asynchronous Receiver Transmitter (UART) interface, and the memory is an SD card and is connected with a Serial Peripheral Interface (SPI) of the processor.
The input module is used for acquiring vehicle running data in real time. The processor is used for writing the vehicle driving data into the memory, packaging the vehicle driving data into a data packet and sending the data packet to the cloud platform through the network module.
As shown in fig. 1, the transmission method includes the following operations:
s110, the cloud platform sends a historical data calling instruction to the collector.
The user can perform business applications such as collision prediction, steering prediction, safety score and the like through the vehicle running data received by the cloud platform. In the process of business application, it may be found that data is missing, or data in some time periods is not received, a historical data calling instruction needs to be sent to the collector through the cloud platform to notify the collector to upload the missing data.
And S120, the collector responds to the historical data calling instruction and detects the current state of the vehicle, wherein the state comprises an alarm state and an operation state.
The vehicle is provided with an automatic driving auxiliary device, an AEB module controller and the like, and when the vehicle is detected to be in a dangerous state, a warning signal is sent out, such as an imminent collision, no safety belt is tied and the like, and the vehicle is in a warning state.
When the vehicle is not in the alarming state and is in the normal running process, the vehicle is in the running state.
S130, the collector determines the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state.
And S140, the collector sends corresponding data packets to the cloud platform according to the sending opportunity and the sending frequency.
In this embodiment, the uploaded data packets are classified into 3 types: an alarm data packet, a normal data packet and a historical data packet. The alarm data packet is obtained by packaging vehicle running data in an alarm state, the normal data packet is obtained by packaging vehicle running data in an operating state, and the historical data packet is obtained by packaging historical data determined according to the historical data calling instruction. In addition, the present embodiment sets the transmission timing and frequency of different data packets for the operation state and the alarm state. The sending time includes when to send and the priority between other data packets, specifically, the alarm data packet has the highest priority, and the normal data packet and the historical data packet have the same priority, so as to ensure the timely sending of the alarm data, and then ensure the timely sending of the normal operation data and the historical data. The frequency includes how often a packet is sent, how many packets are sent at a time.
Specifically, the collector firstly judges whether the vehicle is in an alarm state; if the vehicle is in an alarm state, packing the collected vehicle driving data into a plurality of alarm data packets, and independently sending the alarm data packets to the cloud platform at a first frequency; at this time, the normal data packet transmission is suspended, the historical data packet is not transmitted, and the alarm data packet is transmitted at full speed preferentially. For example, 3 alarm packets at a time are sent at intervals of 1 s.
And if the vehicle is not in the alarm state or the alarm data packet is sent completely, the collector judges whether the vehicle is in the running state or not. And if the vehicle is in a running state, the collector packs the collected vehicle running data into a plurality of normal data packets, packs the historical data into a plurality of historical data packets according to the historical data calling instruction, and cross-sends the normal data packets and the historical data packets to the cloud platform at a second frequency and a third frequency respectively. The first frequency is the sum of the second frequency and the third frequency. For example, normal data packets are sent once every 3s, one packet at a time. The historical data packets are sent once every 3s, 2 packets at a time. It can be seen that the sum of the number of normal data packets and the number of historical data packets in the same time is the same as the number of alarm data packets. The normal data packet and the historical data packet are sent in a cross mode, so that the two data almost synchronously reach a cloud platform, and the instantaneity requirement on the normal report and the historical data packet is met.
After the historical data packets are sent, a plurality of subsequent normal data packets are independently sent to the cloud platform at a fourth frequency, and the fourth frequency is less than or equal to the first frequency. That is, normal data packets can be sent at full speed or not at full speed to save communication resources.
In an optional embodiment, the current state of the vehicle further includes a stopped state, for example, the vehicle is stopped and a hand brake is pulled, at this time, the vehicle is not in an operating state and is not in an alarm state (or the sending of the alarm data packet is completed), and it is not necessary to send a normal data packet, but only a historical data packet needs to be sent, so that the historical data is packed into a plurality of historical data packets according to the historical data calling instruction, and the plurality of historical data packets are separately sent to the cloud platform at a fifth frequency. The fifth frequency is less than or equal to the first frequency, that is, the historical data packet can be sent at full speed or not sent at full speed in order to save communication resources.
It should be noted that full-speed transmission in this embodiment refers to: 1) only determining whether the collector is successfully sent or not, and not responding if the collector is received or not; 2) all communication resources which can be provided by the collector are occupied for sending, and the bandwidth is occupied.
The cloud platform in this embodiment may send a historical data calling instruction to the collector, so that data required by a service is automatically acquired in a network transmission manner; the data packets uploaded by the collector comprise normal data packets, historical data packets and alarm data packets, so that the vehicle driving data are divided and then provided to the cloud platform, and classified transmission is realized; moreover, the collector can determine the sending opportunity and frequency of different types of data according to the current state of the vehicle, and the alarm data packet is sent preferentially with the highest frequency, so that the safety of the vehicle is ensured; the normal data packet and the historical data packet are transmitted in a cross and synchronous mode, the instantaneity requirements of the normal data packet and the historical data packet are considered, and data required by services can be provided for the cloud platform in time. The embodiment meets the service requirement of the cloud platform on data through diversified data packets and sending modes.
Fig. 3 is a flowchart of another method for transmitting vehicle driving data according to an embodiment of the present invention, which details a historical data retrieval instruction, a process of retrieving historical data by a collector, and processing of data by a cloud platform based on the embodiment shown in fig. 1. The method specifically comprises the following operations:
s210, the collector combines the various vehicle running data collected at each moment into a record, and the collected moment is used as a record identifier and written into a memory.
Referring to fig. 2, the vehicle driving data collected by the collector includes, but is not limited to: positioning data, AEB data (alarm information, obstacle information, brake information, lane line information, etc.), vehicle CAN data (engine torque, rotational speed, total mileage, fuel consumption, coolant temperature, etc.), vehicle attitude data, and camera data. In the embodiment, the data acquired at the same time (for example, the time between 1s and 2 s) are combined into one record, and the acquisition time is used as a common record identifier, so that separate records are not required for each kind of data.
The acquisition time is the system time provided by the GPS Beidou NTP timing server, and when the acquisition device is not successfully accessed to the GPS Beidou NTP timing server, for example, during the startup and shutdown process or network disconnection, the system time is not available. In order to ensure that data is successfully stored and time information is not lost, the acquisition time is customized in the embodiment. Specifically, the collector judges whether the system time exists at the moment after combining the records; and if the system time exists, taking the system time during acquisition as the acquisition time, and effectively taking the acquisition time and the acquisition time as the record identifier to write the record identifier into the memory, which is a normal condition. And if the system time does not exist, taking the next moment of the acquisition moment of the last record in the memory as the acquisition moment of the current record, and further writing the acquisition moment and the invalid time as a record identifier into the memory.
For example, if the collector determines that there is no system time after merging the first record, and the collection time of the last record in the collector is 4 months, 22 days, 8:00, 4 months, 22 days, 8:01, are used as the collection time of the first record, and are written into the memory together with "time invalid". If there is no system time after the collector merges the second record, 4 months, 22 days, 8:02 is taken as the collection time of the second record and is written into the memory together with the "time invalid". And the collector has the system time of 4 months, 23 days and 6:00 after merging the third record, and then the collector takes the 4 months, 23 days and 6:00 as the collection time of the third record and writes the collection time and the time into the memory together.
It should be noted that the storage is performed continuously with the acquisition of the input module, and is not interfered by the transmission of the data packet, and the storage is continued even if the acquisition device stops transmitting the data packet.
S220, after detecting the designated alarm data packet, the cloud platform determines the required time range according to the type of the designated alarm data packet.
Data missing or fault can cause insufficient platform data, thereby bringing difficulty to accident analysis or product optimization analysis data, and increasing the data retrieval function.
In an application scenario, the alarm data packet is obtained by packaging vehicle driving data in an alarm state, but data before and after the alarm state still has significance for accident analysis, and the data needs to be recalled if the data is not transmitted.
It should be noted that, in general, the collector only needs to upload the alarm data packet, and the data before and after the alarm data packet may be packed into a normal data packet, or may not be packed, and is only stored, because the collection frequency (ms level) is much higher than the transmission frequency (s level), the vehicle driving data is almost unchanged within several milliseconds, and the network resources are limited, and it is not necessary to upload all the collected data.
The designated alarm data packet is a data packet selected by a user when the user performs service application, for example, when the accident reason is analyzed, the alarm data packet uploaded in the accident occurrence process is used as the designated alarm data packet. The reason why the same treatment is not carried out on all the alarm data packets is that when the vehicle is in an alarm state, the possibility of accidents is indicated, but the probability of the actual accidents is low, so that only the alarm data packets in the process of the accidents are called.
Types of designated alarm data packets include, but are not limited to, a belt loss, a transmitter failure, a battery failure, a fuel warning, an abnormal tire pressure, an excessive vehicle following, etc. The required time ranges corresponding to different types are different, and the corresponding relation can be established in advance. For example, if the data in the half minute before the warning is important when the seat belt is not fastened and reflects the case where the seat belt is not fastened, the required time range is the vehicle travel data in the half minute before the warning. For another example, when the vehicle approaches too close, data within 1 minute before the alarm and data within 1 minute after the alarm are important, and the data can reflect whether the vehicle has a braking abnormality before the accident or whether the vehicle has a protective measure after the accident, and the required time range is the vehicle driving data within 1 minute before and after the alarm.
And S230, if the time range of the received data cannot cover the required time range, the cloud platform determines the acquisition starting time and the acquisition ending time according to the uncovered time range, and determines a data structure body according to the type of the specified alarm data packet.
And searching the received data by the cloud platform, and if the time range of the received data cannot cover the required time range, for example, 8: 03-8: 05 is not covered, taking 8:03 as the acquisition starting time and 8:05 as the acquisition ending time.
The data structure bodies (including data types and sequences) corresponding to different types are different and are defined according to business requirements. Illustratively, the data structure body corresponding to the vehicle passing-near type is positioning data, AEB data, vehicle attitude data and camera data, and the data meeting the requirements of sequence and type can be directly input into a service related model or algorithm without adjustment for prediction and analysis.
The purpose of defining the data structure body in this embodiment is to reduce the data transmission amount by using the data screening and combining capability of the collector, thereby accelerating the data transmission efficiency and reserving more time for the uploading of normal data packets; and the cloud platform can directly apply the data structure in the historical data packet to the service without secondary analysis and processing.
And S240, the cloud platform generates a historical data calling instruction according to the acquisition starting time, the acquisition ending time and the data structure body, and sends the historical data calling instruction to the acquisition device.
And S250, the collector responds to the historical data calling instruction and detects the current state of the vehicle, wherein the state comprises an alarm state and an operation state.
And S260, the collector responds to the historical data calling instruction, scans the records in the memory according to the collection starting time and the collection finishing time, and judges whether the records have matched record segments.
The execution order of S250 and S260 is not limited.
The collector analyzes the historical data calling instruction to obtain the collection starting time and the collection ending time, and searches the matched recording segments in the memory.
Optionally, if there is no matched recording segment, the collector directly returns an end data packet to the cloud platform to end the operation of retrieving the historical data, and automatically returns to an operation of separately sending a plurality of subsequent normal data packets to the cloud platform at a fourth frequency.
S270, if the matched recording segments exist, the collector screens corresponding data from the recording segments according to the data types and combines the data according to the sequence; and packaging the history data obtained by combination into a history data packet.
According to the above description, the collection time may be invalid, which may mislead the cloud platform, resulting in an error in the business analysis or prediction result. In order to solve the problem, the collector packs the combined historical data into a historical data packet, and comprises the following steps: and the collector packs the combined historical data, the time valid/time invalid identification corresponding to the historical data and the running accumulated time length of the system into a historical data packet together.
The running accumulated time of the system is a sequence of self-accumulated time of the system after the system is started and is continuously accumulated from 1 to 1000, 2000 and the like based on a self timer. The running accumulated time length can reflect the recorded sequence, but has no time significance and cannot know the exact time.
S280, the collector determines the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state.
And S290, the collector sends a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency.
In the process of sending various data packets, adding an identifier for judging whether the data packets are finished or not in each data packet, and finishing the identifier in the last data packet so as to inform the cloud platform that the data packets are all sent.
Optionally, when the collector sends the historical data packet to the cloud platform, the collector sends a power outage prohibition instruction to the vehicle controller, so that the vehicle controller maintains power supply. The vehicle controller may be an AEB controller that prevents automatic shutdown after an ACC power outage, resulting in a history packet interruption.
And S291, the cloud platform judges the data sequence and the integrity according to the identifier of the valid time/invalid time, the operation accumulated duration and the frame number of the data frame where the historical data packet is located.
The sequence of the data packets can be distinguished by the frame number of the data frame where the historical data packet is located, and the sequence of the historical data can be distinguished by the running accumulated duration. Aiming at the historical data with invalid time, the cloud platform judges the data sequence through the data of other dimensions such as the frame number and the operation accumulated time length, so that the data integrity is ensured. Table 1 shows the partial content of the historical data in 2 data packets, the sequence of two data packets can be determined according to the sequence of the frame number, the sequence and the integrity of the data can be determined by running the accumulated time, and the data is actually complete although the fault appears at the acquisition time.
Table 12 partial contents of history data in data packet
Referring to fig. 2, a system for transmitting vehicle driving data according to an embodiment of the present invention includes: the system comprises a collector and a cloud platform.
The cloud platform is used for sending a historical data calling instruction to the collector.
The collector is used for responding to the historical data calling instruction and detecting the current state of the vehicle, wherein the state comprises an alarm state and an operation state.
And the collector is used for determining the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state.
And the collector is used for sending a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency.
The alarm data packet is obtained by packaging vehicle running data in an alarm state, the normal data packet is obtained by packaging vehicle running data in an operation state, and the historical data packet is obtained by packaging historical data determined according to the historical data calling instruction.
Optionally, when the collector sends the corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency, the collector is specifically configured to: judging whether the vehicle is in an alarm state; if the vehicle is in an alarm state, packing the collected vehicle driving data into a plurality of alarm data packets, and independently sending the alarm data packets to the cloud platform at a first frequency; if the vehicle is not in the alarm state or the alarm data packet is sent completely, judging whether the vehicle is in the running state; if the vehicle is in a running state, packaging the collected vehicle running data into a plurality of normal data packets, packaging the historical data into a plurality of historical data packets according to the historical data calling instruction, and respectively sending the normal data packets and the historical data packets to the cloud platform in a cross mode at a second frequency and a third frequency; after the historical data packets are sent, independently sending a plurality of subsequent normal data packets to the cloud platform at a fourth frequency; the first frequency is the sum of a second frequency and a third frequency, and the fourth frequency is less than or equal to the first frequency.
Optionally, the state further includes a stop state; if the vehicle is not in the alarm state or the alarm data packet is sent completely, the collector is used for determining the fifth frequency of independent sending of the historical data packet according to the stop state if the vehicle is in the stop state after judging whether the vehicle is in the running state or not; packaging the historical data into a plurality of historical data packets according to the historical data calling instruction, and independently sending the plurality of historical data packets to the cloud platform at a fifth frequency; the fifth frequency is less than or equal to the first frequency.
Optionally, the collector includes: the system comprises a processor, a memory connected with the processor, a network module and an input module; the processor is used for combining the various vehicle running data collected at each moment into a record, and writing the record mark serving as the collection moment into the memory; the processor is used for responding to the historical data calling instruction, scanning records in the memory according to the acquisition starting time and the acquisition ending time, and judging whether a matched record segment exists; if the matched recording segments exist, screening corresponding data from the recording segments according to the data types, and combining according to the sequence; and packaging the historical data obtained by combination into a historical data packet, and sending the historical data packet to the cloud platform through the network module.
The cloud platform is used for determining a required time range according to the type of a specified alarm data packet after the specified alarm data packet is detected; if the time range of the received data cannot cover the required time range, determining the acquisition starting time and the acquisition ending time according to the uncovered time range, and determining a data structure body according to the type of the specified alarm data packet; the data structure body comprises data types and sequences; and generating a historical data calling instruction according to the acquisition starting time, the acquisition ending time and the data structure body, and sending the historical data calling instruction to the acquisition unit.
Optionally, the collector is configured to respond to the historical data retrieval instruction, scan records in the memory according to the collection start time and the collection end time, and determine whether there is a matching record segment; if the matched recording segments exist, screening corresponding data from the recording segments according to the data types, and combining according to the sequence; and packaging the history data obtained by combination into a history data packet.
Optionally, the processor is configured to combine multiple vehicle driving data collected at the current time into one record, and determine whether there is system time at this time; if the system time exists, taking the system time as the acquisition time, effectively taking the acquisition time and the time as record identifiers, and writing the record identifiers into a memory; and if the system time does not exist, taking the next moment of the acquisition moment of the last record in the memory as the acquisition moment of the current record, and further writing the acquisition moment and the invalid time as a record identifier into the memory.
Optionally, the collector is configured to pack the combined historical data, the identifier of validity/invalidity of time corresponding to the historical data, and the accumulated running duration of the system into a historical data packet; and the cloud platform is used for judging the data sequence and integrity according to the identification of the valid time/invalid time, the running accumulated time length and the frame number of the data frame where the historical data packet is located.
Optionally, when the collector sends the historical data packet to the cloud platform, the collector is configured to send a power outage prohibition instruction to the vehicle controller, so that the vehicle controller maintains power supply.
The transmission system for vehicle driving data provided in this embodiment can execute the transmission method provided in any one of the above embodiments, and has corresponding technical effects, which are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (10)
1. A transmission method of vehicle driving data is applied to a transmission system of the vehicle driving data, the system comprises a collector and a cloud platform, and the method comprises the following steps:
the cloud platform sends a historical data calling instruction to the collector;
the collector responds to the historical data calling instruction and detects the current state of the vehicle, wherein the state comprises an alarm state and an operation state;
the collector determines the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state;
the collector sends a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency;
the alarm data packet is obtained by packaging vehicle running data in an alarm state, the normal data packet is obtained by packaging vehicle running data in an operation state, and the historical data packet is obtained by packaging historical data determined according to the historical data calling instruction.
2. The method of claim 1, wherein the collector sends the corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency, and the method comprises the following steps:
the collector judges whether the vehicle is in an alarm state;
if the vehicle is in an alarm state, the collector packs the collected vehicle driving data into a plurality of alarm data packets and independently sends the alarm data packets to the cloud platform at a first frequency;
if the vehicle is not in the alarm state or the alarm data packet is sent completely, the collector judges whether the vehicle is in the running state or not;
if the vehicle is in a running state, the collector packs the collected vehicle running data into a plurality of normal data packets, packs the historical data into a plurality of historical data packets according to the historical data calling instruction, and sends the normal data packets and the historical data packets to the cloud platform in a crossed mode at a second frequency and a third frequency respectively; after the historical data packets are sent, independently sending a plurality of subsequent normal data packets to the cloud platform at a fourth frequency;
the first frequency is the sum of a second frequency and a third frequency, and the fourth frequency is less than or equal to the first frequency.
3. The method of claim 2, wherein the states further comprise a stopped state;
after the collector judges whether the vehicle is in the running state if the vehicle is not in the alarm state or the alarm data packet is sent out, the method further comprises the following steps:
if the vehicle is in a stop state, the collector determines a fifth frequency of independent sending of the historical data packet according to the stop state;
the collector packs the historical data into a plurality of historical data packets according to the historical data calling instruction, and independently sends the plurality of historical data packets to the cloud platform at a fifth frequency;
the fifth frequency is less than or equal to the first frequency.
4. The method of claim 1, wherein the collector, in response to the historical data retrieval instruction, prior to detecting the current state of the vehicle, further comprises:
the collector combines various vehicle running data collected at each moment into a record, and the collected moment is used as a record identifier and written into the memory;
the cloud platform sends a historical data calling instruction to the collector, and the historical data calling instruction comprises the following steps:
after detecting a specified alarm data packet, the cloud platform determines a required time range according to the type of the specified alarm data packet;
if the time range of the received data cannot cover the required time range, the cloud platform determines the acquisition starting time and the acquisition ending time according to the uncovered time range, and determines a data structure body according to the type of the specified alarm data packet; the data structure body comprises data types and sequences;
and the cloud platform generates a historical data calling instruction according to the acquisition starting time, the acquisition ending time and the data structure body and sends the historical data calling instruction to the acquisition device.
5. The method according to claim 4, wherein before the collector determines the timing and frequency of the alarm data packet to be sent alone and the timing and frequency of the normal data packet and the historical data packet to be sent across according to the state, the method further comprises:
the collector responds to the historical data calling instruction, scans the records in the memory according to the acquisition starting time and the acquisition ending time, and judges whether the records have matched record segments;
if the matched recording segments exist, the collector screens corresponding data from the recording segments according to the data types and combines the data according to the sequence;
and the collector packs the historical data obtained by combination into a historical data packet.
6. The method of claim 5, wherein the collector combines the multiple types of vehicle driving data collected at each moment into one record, takes the collection moment as a record identifier, and writes the record identifier into a memory, and comprises:
the collector combines various vehicle running data collected at the current moment into a record and judges whether the system time exists at the moment;
if the system time exists, taking the system time as the acquisition time, effectively taking the acquisition time and the time as record identifiers, and writing the record identifiers into a memory;
and if the system time does not exist, taking the next moment of the acquisition moment of the last record in the memory as the acquisition moment of the current record, and further writing the acquisition moment and the invalid time as a record identifier into the memory.
7. The method of claim 6, wherein the step of packaging the combined historical data into a historical data package by the collector comprises:
the collector packs the combined historical data, the time valid/time invalid identifications corresponding to the historical data and the running accumulated duration of the system into a historical data packet;
after the collector sends the corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency, the method further comprises the following steps:
and the cloud platform judges the data sequence and integrity according to the identifier of the valid time/invalid time, the running accumulated time and the frame number of the data frame where the historical data packet is located.
8. The method of claim 1, wherein the collector, when sending the historical data packet to the cloud platform, comprises:
the collector sends a power-off prohibition instruction to the vehicle controller so that the vehicle controller can maintain power supply.
9. A transmission system of vehicle travel data, characterized by comprising: a collector and a cloud platform;
the cloud platform is used for sending a historical data calling instruction to the collector;
the collector is used for responding to the historical data calling instruction and detecting the current state of the vehicle, wherein the state comprises an alarm state and an operation state;
the collector is used for determining the time and frequency for independently sending the alarm data packet, the time and frequency for alternately sending the normal data packet and the historical data packet and the time and frequency for independently sending the normal data packet according to the state;
the collector is used for sending a corresponding data packet to the cloud platform according to the sending opportunity and the sending frequency;
the alarm data packet is obtained by packaging vehicle running data in an alarm state, the normal data packet is obtained by packaging vehicle running data in an operation state, and the historical data packet is obtained by packaging historical data determined according to the historical data calling instruction.
10. The system of claim 9, wherein the collector comprises: the system comprises a processor, a memory connected with the processor, a network module and an input module;
the input module is used for acquiring vehicle running data in real time;
the processor is used for combining the various vehicle running data acquired by the input module at each moment into a record, and writing the record into the memory by taking the acquisition moment as a record identifier;
the processor is used for responding to the historical data calling instruction, scanning records in the memory according to the acquisition starting time and the acquisition ending time, and judging whether a matched record segment exists; if the matched recording segments exist, screening corresponding data from the recording segments according to the data types, and combining according to the sequence; and packaging the historical data obtained by combination into a historical data packet, and sending the historical data packet to the cloud platform through the network module.
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