CN116320041A - Data compression and analysis method, vehicle, electronic device and storage medium - Google Patents

Abstract

An embodiment of the present application provides a data compression and analysis method, a vehicle, an electronic device, and a storage medium, and a data compression method, including: collecting n signal values according to a preset collection cycle; generating data packets corresponding to the n signal values , the data packet includes storage bits and flag bits, the number of flag bits is n, the i-th bit of the flag bit is used to identify the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, and the storage bit is used for Store the first signal value and the jth signal value identified as different by the flag bit, j is greater than or equal to 2; send the data packet. This application stores non-repetitive signal values in data packets, filters out repeated signal values, uses flag bits to identify stored signal values, and filters out repeated values of collected signals by optimizing the data organization form, thereby Reduce data volume and realize data compression.

Description

Data compression, analysis method, vehicle, electronic device and storage medium

technical field

The application belongs to the field of data processing, and in particular relates to a data compression and analysis method, a vehicle, an electronic device and a storage medium.

Background technique

With the development of networking and intelligence, especially autonomous driving technology, there are more and more sensors and electronic control units on the car, the software system in the car is becoming more and more complex, and the demand for computing power has also increased significantly. The car has evolved It has become a mobile "supercomputer". This "supercomputer" will generate a large amount of data when it is running. In extreme cases, a car can even generate more than 3TB of data a day. Based on the requirements of remote control, new energy monitoring, remote fault diagnosis and automatic driving learning, the cloud needs to collect relevant data in the car and upload it to the cloud. The traditional car cloud data transmission method is to pre-define the arrangement order of all signal data, and then The data of these signals is collected at a fixed frequency. In order to facilitate transmission, the data files collected multiple times are generally combined into one file and then uploaded. This will make the overall data volume larger, not only occupying storage space but also causing data uploading. A long time.

Therefore, in the face of the massive data generated by tens of thousands of vehicles, how to transmit data to the cloud system efficiently and at low cost is an urgent problem to be solved.

Contents of the invention

In view of this, one of the technical problems solved by the embodiments of the present application is to provide a data compression and analysis method, a vehicle, an electronic device and a storage medium, so as to overcome or avoid the above problems.

Based on the above purpose, the present application provides a data compression method, including: collecting n signal values according to a preset collection period; generating data packets corresponding to the n signal values, and the data packets include storage bits and flags bit, the number of bits of the flag bit is n, the i-th bit of the flag bit is used to identify that the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, and the storage bit is used to store the first signal values and the jth signal value identified as different by the flag bit, j is greater than or equal to 2; sending the data packet.

Optionally, the first bit of the flag bit is used to identify that the n signal values are all different.

Optionally, the n signal values are signal values of the same signal collected according to a preset collection period.

Optionally, the number of the data packets includes several, the signal names corresponding to the data packets are stored in the signal table, and before the sending of the data packets, it also includes: The order of arrangement of the signal names in the signal table, sorting several of the data packets; packing the sorted several of the data packets to obtain a combination of several of the data packets; the sending The data packet includes: sending the combined packet.

Optionally, when the data packet is sent, if the network is unavailable, a cache file corresponding to the combination packet is generated.

The embodiment of the present application also provides a data parsing method, including: receiving and parsing a data packet, determining the value of the storage bit and the flag bit in the data packet, and obtaining the n signal values; wherein, obtaining n signal values according to the value of the storage bit and the flag bit includes: for the jth signal value identified as different by the flag bit, storing in the storage bit Set the signal value of the signal value corresponding to the j-th bit; according to the order of the first bit to the n-th bit of the flag bit, set the signal value corresponding to the k-th bit identified as the same by the flag bit as the first The signal value corresponding to k-1 bits, where k is greater than or equal to 2.

Optionally, the receiving and parsing of data packets includes: receiving a composite packet composed of several data packets; according to the signal names stored in a preset order in the signal table, and several of the data packets in the composite packet to determine the signal name corresponding to the data packet.

The embodiment of the present application also provides a data compression and analysis system, including: a signal acquisition device, a vehicle-end processing device, a data transmission device, and a cloud processing device; the signal acquisition device is used to collect signal values according to a preset collection cycle The vehicle-end processing device is used to generate data packets corresponding to the n signal values, the data packets include storage bits and flag bits, the number of flag bits is n, and the ith of the flag bits The bit is used to identify that the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, and the storage bit is used to store the first signal value and the j-th signal value identified as different by the flag bit, j Greater than or equal to 2; the data transmission device is used to send the data packet; the cloud processing device is used to receive and analyze the data packet, and determine the value of the storage bit and the flag bit in the data packet , and obtain the n signal values according to the value of the storage bit and the flag bit; wherein, obtain n signal values according to the value of the storage bit and the flag bit, including: for the value of the flag bit mark the different jth signal values, and set the signal value stored in the storage bit as the signal value corresponding to the jth bit; according to the order of the first bit to the nth bit of the flag bit, the The signal value corresponding to the k-th bit identified as the same flag bit is set as the signal value corresponding to the k-1th bit, and k is greater than or equal to 2.

The embodiment of the present application also provides a vehicle, including: a signal acquisition device, configured to acquire signal values according to a preset acquisition cycle; a vehicle-end processing device, configured to generate data packets corresponding to the n signal values, the The data packet includes storage bits and flag bits, the number of flag bits is n, and the i-th bit of the flag bits is used to identify that the i-th signal value is different from the i-1-th signal value, and i is greater than or equal to 2, so The storage bit is used to store the first signal value and the jth signal value identified as different by the flag bit, j is greater than or equal to 2; the data transmission device is used to send the data packet.

The embodiment of the present application also provides an electronic device, including: a processor, a memory, a communication interface, and a communication bus, and the processor, the memory, and the communication interface complete mutual communication through the communication bus; The memory is used to store at least one executable instruction, and the executable instruction causes the processor to perform the operation corresponding to the method described above.

The embodiment of the present application also provides a computer storage medium, on which a computer program is stored, and when the program is executed by a processor, the method described in the above embodiment is implemented.

It can be seen from the above technical solutions that firstly, n signal values are collected according to the preset acquisition cycle; data packets corresponding to n signal values are generated, and the data packets include storage bits and flag bits, the number of flag bits is n, and the flag bits The i-th bit of is used to identify that the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, and the storage bit is used to store the first signal value and the j-th signal value identified as different by the flag bit, and j is greater than Equal to 2; send the packet last. This application stores non-repetitive signal values in data packets, filters out repeated signal values, uses flag bits to identify stored signal values, and filters out repeated values of collected signals by optimizing the data organization form, thereby Reduce data volume and realize data compression. For car-cloud data transmission, the reduction in the volume of uploaded data on the car end reduces the bandwidth occupied by data uploaded to the cloud, which not only reduces network traffic costs, but also improves the stability of the data collection system. At the same time, a single upload on the car end The reduction in data volume means that a single cloud server can receive more vehicle data per unit time, improving data transmission efficiency and concurrent data processing capabilities in the cloud, thereby reducing the overall cloud operation and maintenance costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the embodiments of this application, and those skilled in the art can also obtain other drawings based on these drawings.

FIG. 1 is a flow chart of a data compression method in Embodiment 1 of the present application;

FIG. 2 is a schematic diagram of a signal value and a corresponding identifier of a data packet according to Embodiment 1 of the present application;

FIG. 3 is a flow chart of a data packet sending method according to Embodiment 2 of the present application;

FIG. 4 is a flow chart of a data analysis method in Embodiment 3 of the present application;

FIG. 5 is a schematic diagram of a data compression and analysis system according to Embodiment 4 of the present application;

FIG. 6 is a schematic diagram of data transmission according to Embodiment 4 of the present application;

FIG. 7 is a schematic structural diagram of an electronic device according to Embodiment 6 of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application shall fall within the protection scope of the embodiments of the present application.

It should be noted that implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time. The specific implementation of the embodiment of the present application will be further described below in conjunction with the accompanying drawings of the embodiment of the present application.

Embodiment one

Fig. 1 is a kind of data compression method flowchart of the embodiment of the present application, as shown in Fig. 1, this data compression method comprises the following steps:

Step S101, collecting n signal values according to a preset collection period.

Specifically, the signal values of several signals are continuously collected within a certain time range, where the "time range" is the collection period, and the time between two continuously collected signal values is the collection time interval. The n signal values are signal values collected in the same acquisition cycle, and the value of n is greater than or equal to 1. For example, n can be 10, and the signal value here can represent a specific value, a certain state, etc. Specifically, the signal value may be a specific numerical value of the collected signal, or a value generated by passing a specific numerical value or state of the collected signal through a preset conversion method. For example, the signal value may be a specific numerical value through Binary text generated by the preset conversion method. In addition, the signal value can also represent a certain range of values, for example, if the collected vehicle speed is between 80 km/h and 90 km/h, the signal value can be represented as 8. In addition, the signal value can also be used to indicate the status of the switch, gear position, etc. For example, the signal value can be set to 1 when the switch is in the on state, and set to 2 when the switch is in the off state.

It should be noted that the specific value or state represented by the signal value and its specific conversion mode are set according to actual needs, and are not limited here.

Optionally, the n signal values are signal values of the same signal collected according to a preset collection period.

Specifically, for a signal, the signal value is continuously collected within a certain time range, and the action of collecting the signal value is usually completed instantaneously, and the time between two continuously collected signal values is the collection time interval. The n signal values can be n signal values obtained by collecting the same signal at n different acquisition times within one acquisition cycle. Generally speaking, in order to facilitate observation and recording, etc., the acquisition time interval between each signal value It is fixed. Taking the car terminal as an example, the signals can be signals such as the temperature inside the car, driving speed, door status, and headlight status.

In this embodiment, the n signal values are the signal values of the same signal collected according to the preset acquisition cycle. For most signals, the signal value of a single signal usually does not change frequently, so according to the preset The repetition rate of the signal value of the same signal collected in the collection period is very high, and in the process of filtering the repeated value of the collected signal in the subsequent signal compression, it can help to reduce the volume of the packaged data packet.

It should be noted that the data compression methods in the embodiments of the present application all take the vehicle end signal as an example, and other signals are also within the scope of protection of the present application.

Step S102, generate data packets corresponding to n signal values, the data packets include storage bits and flag bits, the number of flag bits is n, and the i-th bit of the flag bits is used to identify the i-th and i-1-th signals The values are different, i is greater than or equal to 2, and the storage bit is used to store the first signal value and the jth signal value identified as different by the flag bit, and j is greater than or equal to 2.

Specifically, the data packet includes storage bits and flag bits. The storage bits are used to store signal values, and the flag bits are used to identify the stored signal values. The number of flag bits is n, and each bit of the flag bits is related to n signals Values correspond one to one. The value of the flag bit can be a specific number or symbol, and the specific number or symbol is not limited here, and can be set according to actual needs.

For example, the i-th bit of the flag can use the number "1" to identify that the i-th is different from the i-1th signal value, and the m-th bit of the flag can use the number "0" to identify the m-th and the i-1th signal value m-1 signal values are the same.

Optionally, the first bit of the flag bit is used to identify that the n signal values are all different.

Specifically, when all the signal values in the n signal values are different, the same number or symbol identifying the signal value can be used as the value of the n flag bits, and the storage bits store the n signal values. When the n signal values contain the same signal value, the first bit of the flag can be identified by using a number or a symbol that identifies a different signal value. For the above example, if the number "1" or "0" is used to indicate that the signal values are different or the signal values are the same, then when the first bit of the flag is "0", it can be intuitively obtained that the n signal values are all Not the same conclusion, when the first bit of the flag is "1", it can be known that at least some of the n signal values are the same.

In this embodiment, by using the first bit of the flag to identify that the n signal values are all different, the data packet can be easily analyzed. When the first bit of the flag is identified as the same, it can be directly obtained The conclusion that the n signal values are all different, and in the analysis process, the n signal values stored in the storage bits can be directly set as the signal values corresponding to the 1st bit to the nth bit, the implementation method is simple, and the work is improved efficiency.

Step S103, sending the data packet.

Exemplarily, the data packet can be sent to the cloud, and the signal value can be analyzed and restored before being stored and analyzed.

Exemplarily, FIG. 2 is a schematic diagram of signal values and corresponding identifiers of a data packet according to an embodiment of the present application.

The s1-sn in the figure is used to identify the signal name, each signal name corresponds to a data packet, the following string is a flag bit, and the t1 below it is a storage bit. In FIG. 2, 10 signal values are collected as an example, and a number "1" or a number "0" is used to indicate that the signal values are different or the signal values are the same.

As shown in Figure 2, in the data packet "S1", the 10 signal values are all different, then all the 10 signal values are stored in the storage bit, and each bit of the flag bit is set to a digital "0" to perform mark, respectively corresponding to t1-t10 in Figure 2; in the data packet "S4", the 2nd, 3rd, and 4th signal values are the same as the 1st signal value, and the 6th, 7th, and 8th signal values are the same as the 5th The 1st signal value is the same, the 10th signal value is the same as the 9th signal value, then the 1st, 5th, and 9th signal values are stored in the storage bits, corresponding to t1, t5, t9 in Figure 2 respectively, and the flag The 1st, 5th, and 9th bits of the bit are set to the number "1", and the 2nd, 3rd, 4th, 6th, 7th, 8th, and 10th bits of the flag are set to the number "0" for identification.

It can be seen from the above technical solutions that firstly, n signal values are collected according to the preset acquisition cycle; data packets corresponding to n signal values are generated, and the data packets include storage bits and flag bits, the number of flag bits is n, and the flag bits The i-th bit of is used to identify that the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, and the storage bit is used to store the first signal value and the j-th signal value identified as different by the flag bit, and j is greater than Equal to 2; send the packet last. This application stores non-repetitive signal values in data packets, filters out repeated signal values, uses flag bits to identify stored signal values, and filters out repeated values of collected signals by optimizing the data organization form, thereby Reduce data volume and realize data compression. For car-cloud data transmission, the reduction in the volume of uploaded data on the car end reduces the bandwidth occupied by data uploaded to the cloud, which not only reduces network traffic costs, but also improves the stability of the data collection system. At the same time, a single upload on the car end The reduction in data volume means that a single cloud server can receive more vehicle data per unit time, improving data transmission efficiency and concurrent data processing capabilities in the cloud, thereby reducing the overall cloud operation and maintenance costs.

Embodiment two

Fig. 3 is a flow chart of a method for sending a data packet according to an embodiment of the present application. As shown in Fig. 3, the method for sending a data packet includes the following steps:

Step S301, collecting n signal values according to a preset collection cycle.

Step S302, generating data packets corresponding to n signal values.

Step S303, sorting the several data packets according to the order in which the signal names corresponding to the several data packets are arranged in the signal table.

Specifically, there are multiple data packets, and each data packet corresponds to a signal. The signal name refers to the name of the signal, such as "in-vehicle temperature", "remaining oil level", etc. Several signal names are stored in the signal table. For the signals in the same signal table, the signal value of each signal is The acquisition cycle, acquisition time, and signal acquisition times may be the same. In addition, the signal table can also store signal serial numbers, data types, specific values of the collected signals or conversion methods for converting states into signal values, etc. The signal sequence number is used to indicate the sequence of the signals, and several data packets are sorted according to the sequence; the data type refers to the type of the signal in the signal table, for example, the data type is "ipd", which means that the signals in the signal table are For signals related to intelligent driving, each signal table may correspond to a data type as the data type of the signal stored in the signal table.

Step S304, packing the sorted several data packets to obtain a combined packet of several data packets.

Specifically, the combination package is a packaged set of data packets corresponding to all signals in the signal table. After several data packages are packaged to form a combination package, the combination package can also be named according to the naming rules set in advance, so that the data The package is stored and analyzed, etc., and the naming rules must at least express the packaging time, signal source, and data type of the combined package. Taking vehicles as an example, the naming rule can be "data type-vehicle VIN code-time stamp-signal collection times in this period-signal table version", for example, the package name is "ipd-VIN12345678901234-1660010436000-10-1.2. dat” means that all the signals in the combination package are related to intelligent driving, the vehicle identification code is 12345678901234, the time stamp is 1660010436000, the number of signal collections in the cycle is 10 times, and the signal version is 1.2. The time stamp refers to the time stamp of the package completion time of the data package; the vehicle VIN code is the vehicle identification code, and each vehicle VIN code represents a unique vehicle, and the vehicle VIN code marks the vehicle from which the signal source of the combination package; The signal table version is the version number of the signal table corresponding to the signal in the combination package. Since the collected signal or the conversion method of the signal value will be updated with the development of time, the signal table will also be updated accordingly, so The combination package needs to be named according to the signal table version corresponding to the combination package, and then the signal table corresponding to the combination package can be found according to the data type and signal table version to analyze the combination package.

Step S305, sending the combined package.

Specifically, sending a data packet includes sending a composite packet, and packaging several data packets to generate a composite packet for transmission can facilitate transmission, and compared with sending each data packet separately, the transmission efficiency is improved.

Optionally, when the data packet is sent, if the network is unavailable, a cache file corresponding to the combination packet is generated.

Specifically, if the network is restored to an available state, the cache files are sent in the order of the package completion time of the combined package; space to delete cached files. By sending the cache files in the order of the package completion time of the package, multiple package packages can be sent sequentially in chronological order, avoiding network congestion caused by sending all package packages at the same time, and saving broadband traffic and reducing the The data transmission pressure of the data sending end and the data receiving end. In addition, if the network unavailable time exceeds the threshold, the cache files will be deleted according to the order of the package completion time of the combination package and the remaining cache space, which can effectively release the cache space and facilitate the caching of newly generated cache files, preventing excessive cache from causing The system freezes.

It should be noted that the threshold of network unavailable time and the deletion rule for deleting cached files according to the remaining cache space can be set according to the actual situation, and there is no limitation here.

In this embodiment, when there is no network, a cache file corresponding to the combination package is generated, which can effectively prevent data packet loss.

It can be seen from the above technical scheme that firstly, n signal values are collected according to the preset acquisition period, and then the data packets corresponding to the n signal values are generated, and the signal names corresponding to several data packets are arranged in the signal table according to the order of arrangement of several data packets. Sort the data packets, pack the sorted data packets, get a combination package of several data packets, and finally send the combination package. In this embodiment, several data packets are packaged according to the arrangement order of the signals indicated in the signal table to generate a combined package. At the same time, each data packet can find the corresponding signal name, signal value conversion method, and data in the signal table. Type, etc., avoiding the need to record the signal name and signal value conversion method in each data packet, reducing the volume of data upload, packaging several data packets to generate a combined package for transmission, which can facilitate transmission and improve transmission efficiency.

Embodiment three

Fig. 4 is a flow chart of a data parsing method according to an embodiment of the present application. As shown in Fig. 4, the data parsing method includes the following steps:

Step S401, receiving and analyzing the data packet, and determining the value of the storage bit and the flag bit in the data packet.

Specifically, after receiving the data packet, the data in the data packet needs to be parsed, wherein the data packet includes a storage bit and a flag bit, the number of flag bits is n, and the i-th bit of the flag bit is used to identify the i-th Different from the i-1th signal value, i is greater than or equal to 2, and the storage bit is used to store the first signal value and the jth signal value identified as different by the flag bit, and j is greater than or equal to 2. For a specific data compression method, reference may be made to the first and second embodiments above, and details are not repeated here. Then restore the n signal values according to the values of the storage bit and the flag bit.

Optionally, receiving a combined package consisting of several data packages, and determining the signal name corresponding to the data package according to the signal names stored in the signal table in a preset order and the sequence of the several data packages in the combined package.

In this implementation manner, the function of the signal table and the relationship between the signal table and the data packet may refer to the second embodiment above, which will not be repeated here. The order in which several data packets are packaged to generate a combined package is arranged according to the signal arrangement order indicated by the signal table, so the signal corresponding to each data package in the combined package can be determined according to the signal number and signal name in the signal table Name, the process is convenient and simple.

Optionally, the n signal values are signal values of the same signal collected according to a preset collection period.

Step S402 , for the signal values of the j-th bit identified as different by the flag bit, set the signal value stored in the storage bit as the signal value corresponding to the j-th bit.

Specifically, if the flag bit is marked as a different j-th signal value, then the j-th signal value is the signal value corresponding to the j-th bit of the flag bit stored in the storage bit. In addition, if the first bit of the flag bit identifies If they are the same, the n signal values stored in the storage bits are respectively set as the signal values corresponding to the first bit to the nth bit.

Step S403 , according to the order of the first bit to the nth bit of the flag bit, sequentially set the signal value corresponding to the kth bit identified as the same by the flag bit as the signal value corresponding to the k-1th bit, where k is greater than or equal to 2.

Exemplarily, the flag bit uses the number "1" and the number "0" to indicate that the signal value is different and the signal value is the same, the value of the flag bit in the data packet is "100101", and the value of the storage bit is "234". The 6 signal values in the package are analyzed and restored, and for the 1st, 4th, and 6th signal values identified by the flag bits as different, the signal values stored in the storage bits are respectively set to the signals corresponding to the 1st, 4th, and 6th bits Values "2", "3", "4"; set the signal value corresponding to the second bit with the same flag bit as the signal value "2" corresponding to the first bit; according to the first bit to the sixth bit of the flag bit The order of the bits, then set the signal value corresponding to the 3rd bit that is identified as the same as the signal value corresponding to the 2nd bit to "2"; finally set the signal value corresponding to the 5th bit that is identified as the same as The 4th bit corresponds to the signal value "3". Thus, the restored signal value "222334" is obtained.

It can be seen from the above technical solution that the data packet is received and analyzed, the value of the storage bit and the flag bit in the data packet is determined, and the signal value stored in the storage bit is set as the jth signal value that is identified as different by the flag bit. The signal value corresponding to bit j, according to the order of the 1st bit to the nth bit of the flag bit, sequentially set the signal value corresponding to the kth bit identified as the same by the flag bit as the signal value corresponding to the k-1th bit, k greater than or equal to 2. According to the value of the storage bit and the flag bit, this embodiment can well restore the n signal values corresponding to each data packet, and the analysis and restoration method is simple and easy to implement.

Embodiment four

Fig. 5 is a schematic diagram of a data compression and analysis system according to an embodiment of the present application. As shown in Fig. 5, the data compression system and analysis include:

Signal collection device 501: the signal collection device is used to collect signal values according to a preset collection cycle;

Vehicle-end processing device 502: the vehicle-end processing device is used to generate data packets corresponding to n signal values. The data packets include storage bits and flag bits. The number of flag bits is n, and the i-th bit of the flag bits is used to identify the first i is different from the i-1th signal value, i is greater than or equal to 2, and the storage bit is used to store the first signal value and the jth signal value identified as different by the flag bit, and j is greater than or equal to 2;

Data transmission device 503: the data transmission device is used to send data packets;

Cloud processing device 504: the cloud processing device is used to receive and analyze the data packet, determine the value of the storage bit and the flag bit in the data packet, and obtain n signal values according to the value of the storage bit and the flag bit; wherein, according to the storage bit and the value of the flag bit The value of the flag bit obtains n signal values, including: for the jth signal value identified by the flag bit as different, the signal value stored in the storage bit is set as the signal value corresponding to the jth bit; In order from bit to nth bit, the signal value corresponding to the kth bit identified as the same by the flag bit is set as the signal value corresponding to the k-1th bit, and k is greater than or equal to 2.

Exemplarily, FIG. 6 is a schematic diagram of data transmission according to an embodiment of the present application. In FIG. 6 , each signal collects 10 signal values within one collection period as an example.

As shown in Figure 6, the signal value is first collected by the signal acquisition device, as shown in the lower left of Figure 6, t1-t10 represents the acquisition time in the unified acquisition cycle, and the bottom of each time of t1-t10 is respectively n signals in The signal value collected at the corresponding time, for example, s3 below t1 is the signal value collected by the third signal at time t1.

The vehicle-end processing device compresses the signal values collected by the signal collection device within the collection cycle to obtain several data packets, as shown in the lower right corner of Figure 6. The s1-sn in the figure is used to identify the signal name, and each signal name corresponds to a In the data packet, the following character string is a flag bit, and the t1 below it is a storage bit, and a number "1" or a number "0" is used to indicate that the signal value is different or the signal value is the same. In the data packet "S1" in the figure, the 10 signal values are all different, then all the 10 signal values are stored in the storage bit, and each bit of the flag bit is set as a number "0" for identification. Corresponding to t1-t10 in Figure 6; in the data packet "S3", the 2nd-9th signal value is the same as the 1st signal value, then the 1st and 10th signal values are stored in the storage bit, corresponding to For t1 and t10 in Figure 6, the 1st and 10th bits of the flag are set to the number "1", and the 2-9 bits of the flag are set to the number "0" for identification.

Then package and name the data package and upload it to the cloud through the data transmission device. The data type of all the signals is "type", the vehicle identification code is "12345678901234", the time stamp is "1660010436000", and the number of signal acquisitions in the cycle is 10 times.

Finally, the cloud processing device analyzes and restores the packaged data packets, as shown in the upper right of FIG. 6 , each data packet is restored to obtain n signal values.

It can be seen from the above technical scheme that the signal value is collected according to the preset collection period through the signal collection device; and the data packets corresponding to n signal values are generated in the coarse-grained device at the vehicle end, and the data packets include storage bits and flag bits, flag bits The number of bits is n, the i-th bit of the flag is used to identify that the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, the storage bit is used to store the first signal value and is identified as different by the flag bit The jth signal value of j is greater than or equal to 2; then the data packet is sent through the data transmission device, and finally the data packet is analyzed and restored by the cloud processing device to restore the signal value. In this embodiment, the repeated signal values are filtered out by storing the non-repeated signal values at the vehicle end in the data packet, and the stored signal values are identified by flag bits, and the repetition of the collected signals is filtered out by optimizing the data organization form Value, the reduction in the volume of data uploaded by the car end makes the bandwidth occupied by data uploaded to the cloud smaller, which not only reduces the cost of network traffic, but also reduces the volume of data uploaded by the car end once, which means that a single cloud server can receive data per unit time More vehicle data, improved data transmission efficiency and concurrent data processing capabilities of the cloud, thus reducing the overall cost of cloud operation and maintenance.

Embodiment five

The embodiment of the present application also provides a vehicle, the vehicle is used to implement the data compression method described in the above embodiment, and the vehicle includes:

A signal acquisition device, configured to acquire signal values according to a preset acquisition cycle;

The vehicle-end processing device is used to generate data packets corresponding to n signal values. The data packets include storage bits and flag bits. The number of flag bits is n, and the i-th bit of the flag bits is used to identify the i-th -1 signal value is different, i is greater than or equal to 2, the storage bit is used to store the first signal value and the jth signal value identified as different by the flag bit, j is greater than or equal to 2;

The data transmission device is used for sending data packets.

It can be seen from the above technical scheme that the signal value is collected according to the preset collection period through the signal collection device; and the data packets corresponding to n signal values are generated in the coarse-grained device at the vehicle end, and the data packets include storage bits and flag bits, flag bits The number of bits is n, the i-th bit of the flag is used to identify that the i-th signal value is different from the i-1-th signal value, i is greater than or equal to 2, the storage bit is used to store the first signal value and is identified as different by the flag bit The jth signal value of j is greater than or equal to 2; finally, the data packet is sent through the data transmission device. In this embodiment, the repeated signal values are filtered out by storing the non-repeated signal values at the vehicle end in the data packet, and the stored signal values are identified by flag bits, and the repetition of the collected signals is filtered out by optimizing the data organization form Value, the reduction in the volume of data uploaded by the car end makes the bandwidth occupied by data uploaded to the cloud smaller, which not only reduces the cost of network traffic, but also reduces the volume of data uploaded by the car end once, which means that a single cloud server can receive data per unit time More vehicle data, improve data transmission efficiency.

Embodiment six

FIG. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the electronic device.

The electronic device may include: a processor (processor) 702 , a communication interface (Communications Interface) 704 , a memory (memory) 706 , and a communication bus 708 .

in:

The processor 702 , the communication interface 704 , and the memory 706 communicate with each other through the communication bus 708 .

The communication interface 704 is used for communicating with other electronic devices or servers.

The processor 702 is configured to execute the program 710, and may specifically execute relevant steps in the foregoing method embodiments.

Specifically, the program 710 may include program codes including computer operation instructions.

The processor 702 may be a CPU, or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the smart device may be of the same type, such as one or more CPUs, or may be different types of processors, such as one or more CPUs and one or more ASICs.

The memory 706 is used to store the program 710 . The memory 706 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

The program 710 may be specifically configured to enable the processor 702 to perform operations corresponding to the method described in any one of the foregoing multiple method embodiments.

For the specific implementation of each step in the program 710, refer to the corresponding descriptions in the corresponding steps and units in the above method embodiments, and have corresponding beneficial effects, so details are not repeated here. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described devices and modules can refer to the corresponding process description in the foregoing method embodiments, and details are not repeated here.

The embodiment of the present application also provides a computer storage medium, on which a computer program is stored, and when the program is executed by a processor, the operation corresponding to any method in the above multiple method embodiments is implemented.

It should be pointed out that, according to the needs of implementation, each component/step described in the embodiment of the present application can be split into more components/steps, and two or more components/steps or partial operations of components/steps can also be combined into New components/steps to achieve the purpose of the embodiment of the present application.

The above method according to the embodiment of the present application can be implemented in hardware, firmware, or as software or computer code that can be stored in a recording medium (such as CD, ROM, RAM, floppy disk, hard disk, or magneto-optical disk), or implemented Computer code downloaded over a network that is originally stored in a remote recording medium or a non-transitory machine-readable medium and will be stored in a local recording medium, so that the methods described herein can be stored on a computer code using a general-purpose computer, a dedicated processor, or a Such software processing on a recording medium of programming or dedicated hardware such as ASIC or FPGA. It is understood that a computer, processor, microprocessor controller, or programmable hardware includes memory components (e.g., RAM, ROM, flash memory, etc.) that can store or receive software or computer code, when the software or computer code is or hardware when accessed and executed implements the methods described herein. Furthermore, when a general purpose computer accesses code for implementing the methods shown herein, execution of the code transforms the general purpose computer into a special purpose computer for performing the methods shown herein.

Those skilled in the art can appreciate that the units and method steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the embodiments of the present application.

The above implementations are only used to illustrate the embodiments of the application, rather than to limit the embodiments of the application. Those of ordinary skill in the relevant technical fields can also make various implementations without departing from the spirit and scope of the embodiments of the application Changes and modifications, so all equivalent technical solutions also belong to the scope of the embodiments of the present application, and the scope of patent protection of the embodiments of the present application should be defined by the claims.

Claims (10)

1. A method of data compression, comprising:

n signal values are acquired according to a preset acquisition period;

generating a data packet corresponding to the n signal values, wherein the data packet comprises a storage bit and a flag bit, the bit number of the flag bit is n, the i bit of the flag bit is used for identifying that the i bit is different from the i-1 signal value, i is more than or equal to 2, the storage bit is used for storing the 1 st signal value and the j signal value which is identified as different by the flag bit, and j is more than or equal to 2;

and sending the data packet.

2. The method of claim 1, wherein bit 1 of the flag bit is used to identify that the n signal values are all different.

3. The method of claim 1, wherein the n signal values are signal values of a same signal acquired according to a preset acquisition period.

4. The method of claim 1, wherein the number of data packets includes a number, the signal names corresponding to the data packets are stored in a signal table, and further comprising, prior to the transmitting the data packets:

sorting the data packets according to the arrangement sequence of the signal names corresponding to the data packets in the signal table;

packaging the sequenced data packets to obtain a combined packet of the data packets;

the sending the data packet includes:

and sending the combined packet.

5. The method of claim 4, wherein when the data packet is transmitted, if a network is not available, generating a buffer file corresponding to the combined packet.

6. A data parsing method, comprising:

receiving and analyzing a data packet, determining values of storage bits and flag bits in the data packet, and obtaining n signal values according to the values of the storage bits and the flag bits;

wherein n signal values according to the values of the storage bit and the flag bit include:

setting the signal value stored in the storage bit as a signal value corresponding to the jth bit aiming at the jth bit signal value which is marked as different by the marker bit;

and setting the signal value corresponding to the kth bit identified as the same by the flag bit as the signal value corresponding to the kth-1 bit in sequence from the 1 st bit to the nth bit of the flag bit, wherein k is more than or equal to 2.

7. The method of claim 6, wherein said receiving and parsing the data packet comprises:

receiving a combined packet formed by a plurality of data packets;

and determining the signal names corresponding to the data packets according to the signal names stored in the signal table according to the preset sequence and the arrangement sequence of a plurality of data packets in the combined packet.

8. A vehicle, characterized by comprising:

the signal acquisition device is used for acquiring signal values according to a preset acquisition period;

the vehicle end processing device is used for generating a data packet corresponding to the n signal values, wherein the data packet comprises a storage bit and a flag bit, the bit number of the flag bit is n, the i bit of the flag bit is used for identifying that the i bit is different from the i-1 signal value, i is greater than or equal to 2, the storage bit is used for storing the 1 signal value and the j signal value which is identified as different by the flag bit, and j is greater than or equal to 2;

and the data transmission device is used for transmitting the data packet.

9. An electronic device, comprising: the device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete communication with each other through the communication bus;

the memory is configured to store at least one executable instruction that causes the processor to perform operations corresponding to the method of any one of claims 1-7.

10. A computer storage medium, characterized in that the computer storage medium has stored thereon a computer program which, when executed by a processor, implements the method according to any of claims 1-7.

Images