CN104104568A - Method, device and system for acquiring data from communication bus - Google Patents
Method, device and system for acquiring data from communication bus Download PDFInfo
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- CN104104568A CN104104568A CN201310112124.4A CN201310112124A CN104104568A CN 104104568 A CN104104568 A CN 104104568A CN 201310112124 A CN201310112124 A CN 201310112124A CN 104104568 A CN104104568 A CN 104104568A
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Abstract
The invention relates to a method for acquiring data from a communication bus. The method comprises the following steps: locating information of one or more signals in bus message at which each required signal is located required by the data acquisition party is received; the one or more required signals are extracted from the corresponding bus message based on the locating information; the one or more required signals are packaged into a custom message according to a predetermined rule; and the one or more required signals are transferred to the data acquisition party in the form of the custom message. The invention further provides a terminal device for executing the method and a system comprising the terminal device.
Description
Technical field
Relate generally to data processing technique of the present invention, and relate to particularly for the method from communication bus image data, Apparatus and system.
Background technology
Bussing technique is used more and more widely, and it is used as the public passage of transmission information between subsystem effectively.Can transmit the information between each parts in whole system, exchange, share and the operation such as logic control by bus.As in automobile technical field, CAN bus is developed for automobile for to fail safe, comfortableness, convenience, low public hazards, require and communication between the various electronic control systems that design cheaply.
The message transmitting in bus has certain rule conventionally, and can corresponding a lot of signals in a message.Taking CAN bus as example, it typically carries out data transmission taking message as unit, and can comprise the unlike signal for different sub-systems in a message.Current existing bus data acquisition method is all the collection based on whole piece message, and then parses needed signal again.This acquisition method has obtained too many garbage, in the situation that needs are stored information, can increase memory space.For for example for through vehicle-mounted interface for vehicle bus is collected the such equipment of the car-mounted terminal of data, they need to be by gathered data by being transferred to outside data storage server such as the wireless channel of WLAN or GPRS toward contact.Not only make traffic demand increase to the transmission of complete bus message, efficiency of transmission reduces, and also causes information timeliness variation.Although can alleviate these problems by the mode of the routine such as such as data packing compression transmission and increase bandwidth, these methods do not have the process of image data to carry out any optimization, in fact still have the problem of expensive poor efficiency.
Therefore, the method to the optimization for from communication bus image data, Apparatus and system still have very large demand.
Summary of the invention
Main purpose of the present invention be for solve bus data in gatherer process with great quantities of spare information, cause in message transmitting procedure, taking too much bandwidth and make the problem that efficiency of transmission is low.
For achieving the above object, the invention provides a kind ofly for the method from communication bus image data, described method comprises: receive the locating information of the required one or more signals in data acquisition side in the residing bus message of each desired signal; From corresponding bus message, extract described one or more desired signal based on described locating information; According to pre-defined rule, described one or more desired signals are packaged as to self-defined message; And transmit described one or more desired signals with the form of described self-defined message to described data acquisition side.
According to some embodiments of the present invention, extract described one or more desired signal and comprise the timestamp information of storing the residing bus message of this desired signal associatedly with each desired signal.
According to some embodiments of the present invention, described one or more desired signals are assembled to self-defined message and be included in and in described self-defined message, comprise successively each desired signal and the timestamp information associated with this desired signal.
According to some embodiments of the present invention, described one or more desired signals are assembled to self-defined message and be included in and in described self-defined message, comprise successively each timestamp information and all desired signals associated with this timestamp information.
According to some embodiments of the present invention, described one or more desired signals are assembled to self-defined message and be included in described self-defined message as each desired signal arranges validity mark, whether wherein said validity mark is used to indicate corresponding desired signal can use.
According to some embodiments of the present invention, described locating information comprises the mark of the residing bus message of each desired signal, start byte, start bit and the signal length of each desired signal in its residing bus message.
According to some embodiments of the present invention, described self-defined message is constructed to have the message format that meets communication bus standard.
On the other hand, it is a kind of for the terminal equipment from communication bus image data that the present invention also provides, and described terminal equipment comprises: bus interface, for collecting described bus message from described communication bus; Configuration receiving element, for receiving the locating information of the required one or more signals in data acquisition side at the residing bus message of each desired signal; Signal extraction unit, for extracting described one or more desired signal based on described locating information from corresponding bus message; Signal packaged unit, for being packaged as self-defined message according to pre-defined rule by described one or more desired signals; And signal transmitting unit, transmit described one or more desired signals for the form with described self-defined message to described data acquisition side.
Another aspect, it is a kind of for the system from communication bus image data that the present invention also provides, and described system comprises data acquisition side, communication bus and above-mentioned any terminal equipment.
The invention provides a kind of optimization information gathering scheme based on demand customization, be applicable to the long-range or local collection to bus data.In an embodiment of the present invention, for desired signal is effectively gathered, having formed compression ratio by the fractionation to original message, restructuring is " self-defined " message of tens times, thereby in the situation that satisfying the demands, greatly saved delivery flow rate and memory space, simultaneously can also guarantee information ageing.The scope of application of the present invention is very wide, and the data of any bus type can gather by method, apparatus and system provided by the present invention, only need on packing and resolution rules, slightly do change.
Brief description of the drawings
Below with reference to drawings and Examples, technical scheme of the present invention is described in further detail.
Fig. 1 shows the block diagram of system according to an embodiment of the invention.
Fig. 2 shows the structural representation of terminal equipment according to an embodiment of the invention.
Fig. 3 shows the flow chart of method according to an embodiment of the invention.
Fig. 4 shows signal extraction according to an embodiment of the invention, packing and resolving.
Fig. 5 shows signal extraction, packing and resolving according to another embodiment of the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage are become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be noted that, the each structure in accompanying drawing is schematic instead of determinate, so that those of ordinary skill in the art understand principle of the present invention best, it is not necessarily drawn in proportion.
Fig. 1 shows the block diagram of system according to an embodiment of the invention, and it comprises communication bus 10, terminal equipment 20 and data acquisition side 30 substantially.In one embodiment of the invention, communication bus 10 can be the CAN bus on vehicle, and data acquisition side 30 can be the external system such as GPS vehicle monitoring system.In this case, terminal equipment 20 can be constructed to vehicle electronics module, it has from the interface of CAN bus image data, and on the other hand, this vehicle electronics module can be by its internal processor to processing from the data of CAN bus and treated data being transmitted to outside by wired or wireless mode.For the data acquisition side 30 of for example GPS vehicle monitoring system, terminal equipment 20 can be carried out control command transmission and be replied and the transmission of data content by the wireless transmission protocol such as GPRS or WLAN.
As the skilled personnel to understand, on communication bus 10, the message of transmission comprises various signals, and the system of data acquisition side 30 is only interested in a part of signal wherein.For example, GPS vehicle monitoring system only needs collection vehicle positional information and vehicle speed signal.According to embodiments of the invention, terminal equipment 20 will can all not be sent to data acquisition side all data from communication bus 10, and is only that its needed signal is processed and transmitted, and has greatly improved thus effectiveness.
Fig. 2 shows the structural representation of terminal equipment according to an embodiment of the invention.As shown in Figure 2, terminal equipment 200 comprises configuration receiving element 201, signal extraction unit 202, signal packaged unit 203, signal transmitting unit 204 and for collect the bus interface 205 of bus message from communication bus.Fig. 3 shows the flow chart of the method according to an embodiment of the invention of being carried out by terminal equipment 200.
According to embodiments of the invention, in the time starting data acquisition, for example, in response to the data acquisition command from data acquisition side, first terminal equipment 200 can receive the locating information of the required one or more signals in data acquisition side in the residing bus message of each desired signal by configuration receiving element 201, as shown in step 301.This locating information be make terminal equipment 200 can be from the mass data from bus the information of the needed signal in position data collecting side exactly.For instance, this locating information can comprise the mark of the residing bus message of each desired signal, start byte, start bit and the signal length of each desired signal in its residing bus message.The locating information of desired signal in bus message can be that processor or the server structure rule based on bus message excessively special by data acquisition square tube extracted, or also can set by artificial.About the configuration data of this locating information can directly be sent to terminal equipment by data acquisition side, or provided to terminal equipment according to the demand of data acquisition side by third-party processor or server.
In another embodiment of the present invention, terminal equipment 200 can also receive the numbering to each desired signal via configuration receiving element 201, and this numbering can be used as the foundation of the order that returns to collected signal to data acquisition side.
After obtaining the locating information or other various configuration informations of desired signal, terminal equipment 200 can extract described one or more desired signal from corresponding bus message based on this locating information by signal extraction unit 202, as shown in step S302.For example, first signal extraction unit 202 can mate the mark of received message with the mark of desired signal place message.In the time association message being detected, then according to desired signal the start byte in this message, start bit and signal length by this signal integrity extract.
In a preferred embodiment of the invention, signal extraction unit 202 also will retain the timestamp information of association message, and associated with each desired signal the timestamp information of storing the residing bus message of this desired signal.This timestamp information will be provided for data acquisition side together with desired signal, ensure thus the ageing of signal.The levels of precision of this timestamp can be set as required.On the other hand, signal extraction unit 202 can also be determined the validity of this signal in extracting desired signal, for example, in the time cannot obtaining the signal being consistent completely with locating information, the actual signal of obtaining can be judged as to invalid signals, and similarly, this validity information is offered to data acquisition side with together with obtained signal.
After settling signal extracts, terminal equipment 200 can be packaged as self-defined message according to pre-defined rule by described one or more desired signals by signal packaged unit 203, as shown in step S303.The pack pre-defined rule of institute's foundation of desired signal has been specified to all desired signals combine in what order.
In one embodiment of the invention, in order to save memory space, improve recall precision, self-defined message can be configured to have the message format that meets communication bus standard.Taking the situation shown in Fig. 4 and Fig. 5 as example, self-defined message C will have the form identical with B with actual bus message A.Difference is, has comprised mass data collection side unwanted signal in actual bus message, and self-defined message is all made up of the needed signal in data acquisition side.
In an embodiment of the present invention, can be for each desired signal arranges validity mark in self-defined message.As described in the foregoing, the validity of signal transmitting to data acquisition side can determine extract signal from bus message time, and whether this validity identifies and can be used to indicate corresponding desired signal can use.For instance, if terminal equipment 200 is not received the residing message of certain desired signal, it can fill the position that this desired signal should be occupied in self-defined message according to packetization rules with default value, and is invalid by this signal identification.In an embodiment of the present invention, above-mentioned timestamp information can also be packaged as to self-defined message together with desired signal.In Fig. 4 and Fig. 5, provide respectively the exemplary flow of signal extraction and packing.
In the example of Fig. 4, message A and message B are the original message from communication bus, and message A has comprised signal 1, signal 2, signal 3 and signal 4, and message B has comprised signal 5 and signal 6, and wherein signal 1 and signal 5 are the required signal in data acquisition side.Message C is the result that according to pre-defined rule, signal 1 and signal 5 is packaged as to self-defined message, and it has comprised each desired signal and the timestamp information associated with this desired signal successively, and identifies for each desired signal is provided with validity.In some embodiments of the invention, terminal equipment can for example be received the number information of each desired signal from data acquisition side, and in this case, all desired signals can be successively set in self-defined message according to its numbering.
In the example of Fig. 5, identical with shown in Fig. 4 of message A and message B, and signal 1, signal 4 and signal 5 are the required signal in data acquisition side, message C is the result that according to pre-defined rule, these signals is packaged as to self-defined message, has wherein comprised successively each timestamp information and all desired signals associated with this timestamp information taking timestamp as index.For example, signal 1 and signal 4 be from same message, thereby have identical timestamp, and therefore, in self-defined message C, they are set to immediately after this common timestamp.
In the other embodiment of the present invention, in packing process, also can ignore each signal timestamp separately, and only in the section start setting example of each self-defined message as represented the total time stamp of this message rise time, and this total time stamp comprise successively each desired signal below.
Finally, terminal equipment 200 can transmit described one or more desired signals with the form of described self-defined message to described data acquisition side by signal transmitting unit 204.After the self-defined message that obtains comprising desired signal when data acquisition side, need to resolve it according to corresponding rule.Usually, resolve desired signal and will carry out according to defined rule of when packing, from self-defined message, extract data, signal time and other information needing of signal.
Also the signal having obtained after having illustrated respectively to resolve in Fig. 4 and Fig. 5, in Fig. 4, data acquisition square tube is crossed by packetization rules message C is resolved and can obtain effective signal 1 and timestamp thereof and effectively signal 5 and timestamp (supposing that its validity identifies equal index signal effective) thereof, and data acquisition side can extract signal 1, signal 4, signal 5 and their timestamps separately from message C in Fig. 5.
It should be understood that in the dividing elements of the terminal equipment 200 shown in Fig. 2 it is only that schematically wherein the function of related each unit also can independently realize in module at one, or divides in other different modes.
The object of the invention is for solve bus data in gatherer process with great quantities of spare information, cause taking too much bandwidth in the transmitting procedure of information and make the problem of inefficiency of transmission, and the present invention can only gather for echo signal, thereby information is transmitted more efficiently.Further, in the time of a large amount of signal of needs remote transmission, be subject to the impact of wireless transmission rate and stability, easily there is the accumulation of signal and can not in time information be spread out of, and owing to having removed in an embodiment of the present invention all redundant informations, thereby can avoid better the problem of signal pile-up, the ageing of information is improved.In addition, because the data that collect are all desired signals, thereby no longer need to screen and only need directly signal to be resolved, the efficiency of post-processed is also significantly improved thus.
More than enumerate some specific embodiments and illustrated in detail the present invention, these a few examples are only for explanation principle of the present invention and execution mode thereof, but not limitation of the present invention, without departing from the spirit and scope of the present invention, those of ordinary skill in the art can also make various distortion and improvement.Therefore all technical schemes that are equal to all should belong to category of the present invention also by every claim of the present invention is limited.
Claims (15)
1. for the method from communication bus image data, it is characterized in that, described method comprises:
Receive the locating information of the required one or more signals in data acquisition side in the residing bus message of each desired signal;
From corresponding bus message, extract described one or more desired signal based on described locating information;
According to pre-defined rule, described one or more desired signals are packaged as to self-defined message; And
Form with described self-defined message transmits described one or more desired signals to described data acquisition side.
2. the method for claim 1, is characterized in that, extracts described one or more desired signal and comprises the timestamp information of storing the residing bus message of this desired signal associatedly with each desired signal.
3. method as claimed in claim 2, is characterized in that, described one or more desired signals is assembled to self-defined message and be included in and in described self-defined message, comprise successively each desired signal and the timestamp information associated with this desired signal.
4. method as claimed in claim 2, is characterized in that, described one or more desired signals is assembled to self-defined message and be included in and in described self-defined message, comprise successively each timestamp information and all desired signals associated with this timestamp information.
5. the method for claim 1, it is characterized in that, described one or more desired signals are assembled to self-defined message and be included in described self-defined message as each desired signal arranges validity mark, whether wherein said validity mark is used to indicate corresponding desired signal can use.
6. the method for claim 1, is characterized in that, described locating information comprises the mark of the residing bus message of each desired signal, start byte, start bit and the signal length of each desired signal in its residing bus message.
7. the method for claim 1, is characterized in that, described self-defined message is constructed to have the message format that meets communication bus standard.
8. for the terminal equipment from communication bus image data, it is characterized in that, described terminal equipment comprises:
Bus interface, for collecting described bus message from described communication bus;
Configuration receiving element, for receiving the locating information of the required one or more signals in data acquisition side at the residing bus message of each desired signal;
Signal extraction unit, for extracting described one or more desired signal based on described locating information from corresponding bus message;
Signal packaged unit, for being packaged as self-defined message according to pre-defined rule by described one or more desired signals; And
Signal transmitting unit, transmits described one or more desired signals for the form with described self-defined message to described data acquisition side.
9. terminal equipment as claimed in claim 8, is characterized in that, extracts described one or more desired signal and comprises the timestamp information of storing the residing bus message of this desired signal associatedly with each desired signal.
10. terminal equipment as claimed in claim 9, is characterized in that, described one or more desired signals is assembled to self-defined message and be included in and in described self-defined message, comprise successively each desired signal and the timestamp information associated with this desired signal.
11. terminal equipments as claimed in claim 9, it is characterized in that, described one or more desired signals are assembled to self-defined message and be included in and in described self-defined message, comprise successively each timestamp information and all desired signals associated with this timestamp information.
12. terminal equipments as claimed in claim 8, it is characterized in that, described one or more desired signals are assembled to self-defined message and be included in described self-defined message as each desired signal arranges validity mark, whether wherein said validity mark is used to indicate corresponding desired signal can use.
13. terminal equipments as claimed in claim 8, is characterized in that, described locating information comprises the mark of the residing bus message of each desired signal, start byte, start bit and the signal length of each desired signal in its residing bus message.
14. terminal equipments as claimed in claim 8, is characterized in that, described self-defined message is constructed to have the message format that meets communication bus standard.
15. 1 kinds for the system from communication bus image data, it is characterized in that, described system comprises data acquisition side, communication bus and the terminal equipment as described in any one in claim 9-14.
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| CN113284393A (en) * | 2021-04-29 | 2021-08-20 | 广西玉柴机器股份有限公司 | Processing method and device of driving simulator |
| CN113608483A (en) * | 2021-08-13 | 2021-11-05 | 深圳市元征科技股份有限公司 | Method for acquiring vehicle signal value, electronic equipment and electronic control unit |
| CN113765761A (en) * | 2021-09-09 | 2021-12-07 | 深圳市信锐网科技术有限公司 | Data transmission method, device, equipment, system and storage medium |
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