CN112187601A - Device and method for maintaining equipment based on CAN bus communication - Google Patents
Device and method for maintaining equipment based on CAN bus communication Download PDFInfo
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- CN112187601A CN112187601A CN202011027140.XA CN202011027140A CN112187601A CN 112187601 A CN112187601 A CN 112187601A CN 202011027140 A CN202011027140 A CN 202011027140A CN 112187601 A CN112187601 A CN 112187601A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
Abstract
The invention discloses a device and a method for maintaining equipment based on CAN bus communication, wherein the equipment adopts a CAN bus for communication, and the device comprises: the acquisition module is used for acquiring maintenance data; and the communication module is connected with the acquisition module and used for accessing the CAN bus and transmitting the maintenance data to the CAN bus so as to maintain the equipment. The invention solves the problems of long time consumption and low efficiency of an after-sale treatment mode in the prior art, realizes quick solution of the after-sale problem and ensures stable and reliable operation of a unit.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a device and a method for maintaining equipment based on CAN bus communication.
Background
Due to the non-master characteristic of the CAN (controller Area network) controller local Area network communication mode, the communication node equipment can flexibly join the communication network at any time, data can be sent at any time when the bus is in an idle state, and the online equipment nodes can receive data frames. At present, more and more multi-split air conditioning equipment adopts CAN communication modes.
Due to the complexity of the system and the complexity and variability of the field environment, the multi-split air conditioner is difficult to simulate all fields in a laboratory environment, and therefore various problems may occur in practical use. For the problems, a common solution is to determine a modified scheme, provide a modified circuit board after the scheme verifies ok, replace the original circuit board, or perform software program upgrade on the original circuit board through program upgrade.
By adopting the above processing mode, the former can face to disassemble and install the circuit board, so that the problems of electric shock danger, time-consuming processing and low efficiency exist. The latter needs the original circuit board to support the program upgrading function, the operation of the program upgrading function needs the professional to process, and the problems of long processing time and low efficiency also exist.
Aiming at the problems of long time consumption and low efficiency of an after-sale processing mode in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The invention provides a device and a method for maintaining equipment based on CAN bus communication, which at least solve the problems of long time consumption and low efficiency of an after-sale processing mode in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an apparatus for maintaining equipment, where the equipment communicates using a CAN bus, the apparatus including: the acquisition module is used for acquiring maintenance data; and the communication module is connected with the acquisition module and used for accessing the CAN bus and transmitting the maintenance data to the CAN bus so as to maintain the equipment.
Further, the acquisition module includes: the input interface is used for acquiring maintenance data input by a user; and the display interface is used for displaying the maintenance data and/or the data change of the equipment.
Further, the maintenance data is a maintenance data frame ciphertext; the device still includes: and the decryption module is connected with the acquisition module and used for decrypting the maintenance data frame ciphertext to acquire the maintenance data frame.
Further, the communication module includes: the receiving port is connected with the decryption module and used for receiving the maintenance data frame; and the sending port is used for identifying the communication parameters of the CAN bus, communicating with the CAN bus according to the communication parameters and sending the maintenance data frame to the CAN bus.
Further, the communication parameters include at least: baud rate and polarity.
Further, maintaining the data frame includes: arbitration ID, data zone length, and data zone data.
Further, still include: and the power supply module is used for supplying power to the equipment maintenance device.
According to another aspect of the embodiments of the present invention, there is provided an apparatus maintenance method applied to the apparatus maintenance device, including: identifying communication parameters of the CAN bus, and communicating with the CAN bus according to the communication parameters; obtaining maintenance data; and sending the maintenance data to the CAN bus so as to maintain the equipment.
Further, the maintenance data is a maintenance data frame ciphertext; before sending the maintenance data to the CAN bus, the method further comprises: and decrypting the maintenance data frame ciphertext to obtain the maintenance data frame.
Further, the transmitting the maintenance data to the CAN bus includes: and sending the maintenance data frame to the CAN bus.
Further, obtaining maintenance data includes: popping up an input interface after the equipment maintenance device is powered on and operated; and after monitoring that the user input is finished, acquiring a maintenance data frame ciphertext input by the user.
Further, before obtaining the maintenance data, the method includes: acquiring operation data of equipment; determining a maintenance scheme according to the operating data; generating a maintenance data frame according to the maintenance scheme and the protocol requirement of the CAN bus; and encrypting the maintenance data frame to generate a maintenance data frame cipher text.
Further, after generating the maintenance data frame cipher text, the method further includes: and responding to the acquisition request of the user, and providing the maintenance data frame ciphertext to the user.
According to yet another aspect of embodiments of the present invention, there is provided a storage medium containing computer-executable instructions for performing the device maintenance method as described above when executed by a computer processor.
The invention provides an equipment maintenance device, which utilizes the no-main characteristic of a CAN bus communication network, realizes the quick solution of after-sales problems for multi-split equipment adopting CAN bus communication by accessing the equipment maintenance device and then sending maintenance data in an after-sales engineering processing field, ensures the stable and reliable operation of a unit, and effectively solves the problems of long time consumption and low efficiency of an after-sales processing mode in the prior art.
Drawings
FIG. 1 is a block diagram of an alternative configuration of an equipment maintenance device according to an embodiment of the present invention;
FIG. 2 is a block diagram of an alternative configuration of an equipment maintenance device according to an embodiment of the present invention;
FIG. 3 is an alternative flow diagram of a method of device maintenance according to an embodiment of the invention;
FIG. 4 is another alternative flow diagram of a method of device maintenance according to an embodiment of the present invention;
FIG. 5 is an alternative flow diagram of a method of generating maintenance data according to an embodiment of the invention; and
FIG. 6 is another alternative flow diagram of a method of generating maintenance data according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, there is provided an equipment maintenance apparatus applied to a device that performs communication using a CAN bus, and specifically, fig. 1 shows an alternative structural block diagram of the apparatus, as shown in fig. 1, the apparatus includes:
an obtaining module 102, configured to obtain maintenance data;
and the communication module 104 is connected with the acquisition module 102, and is used for accessing the CAN bus and sending the maintenance data to the CAN bus so as to maintain the equipment.
In the above embodiment, an equipment maintenance device is provided, which utilizes the non-master characteristic of a CAN bus communication network, and for a multi-split device adopting CAN bus communication, on an after-sales engineering processing site, by accessing the equipment maintenance device and then sending maintenance data, an after-sales problem is quickly solved, stable and reliable operation of a unit is ensured, and the problems of long time consumption and low efficiency of an after-sales processing mode in the prior art are effectively solved.
Another device maintenance apparatus is also provided in preferred embodiment 1 of the present invention, specifically, fig. 2 shows an alternative structural block diagram of the apparatus, and as shown in fig. 2, the apparatus includes:
and the interactive interface corresponds to the acquisition module, and can be a capacitive touch screen or other types of display screens, such as a resistive touch screen and the like. The interactive interface mainly comprises: the input interface is used for acquiring maintenance data input by a user; and the display interface is used for displaying the maintenance data and/or the data change of the equipment. The data change of the equipment mainly comprises data change of the equipment before and after maintenance of the equipment, such as value change, state change, response condition and fault, fault code and the like.
In order to avoid possible data leakage, the transmitted data needs to be encrypted, that is, the maintenance data is the maintenance data frame cipher text. Therefore, the maintenance device needs to be internally provided with a decryption part to decrypt the input data frame ciphertext to obtain a real data frame. Based on this, this device still includes: and the decryption module is connected with the acquisition module and used for decrypting the maintenance data frame ciphertext to acquire the maintenance data frame.
This device is communication module still for communicate with the CAN bus, specific this communication module includes: the receiving port is connected with the decryption module and used for receiving the maintenance data frame; and the sending port is used for identifying the communication parameters of the CAN bus, communicating with the CAN bus according to the communication parameters and sending the maintenance data frame to the CAN bus. The sending port is mainly used for identifying communication parameters of the equipment and receiving and sending data, such as baud rate and polarity, so that the equipment maintenance device can normally communicate with the unit equipment and can receive and send data.
Wherein maintaining the data frame comprises: arbitration ID, data zone length, and data zone data. And after the decrypted arbitration ID, the data area length and the data area data are obtained, the data frame is sent to the bus, so that the bus can maintain the equipment according to the data frame, and the after-sale problem of the equipment is solved.
The device also comprises a power module which is used for supplying power to the equipment maintenance device. The power supply module provides various power supply voltages for the equipment maintenance device to operate, and the various power supply voltages can be provided through mains supply conversion, power adapter access or rechargeable equipment and the like.
The device is suitable for multi-split equipment adopting CAN communication, and is also suitable for other equipment adopting CAN communication. Meanwhile, for the units adopting other communication such as RS485, if the communication period position of the device is reserved at the beginning of development, the data frame can be sent after the unit network is accessed, so as to solve the after-sale problem.
The maintenance data frame cipher text can be sent to after-sales field engineering personnel in an email mode, a short message mode and other modes without limitation; meanwhile, the encryption and decryption modes of the data frame are not limited, and the encryption and decryption modes including but not limited to AES and HD5 can be adopted.
By the aid of the equipment maintenance device, when after-sale problems occur, particularly when the problems need to be solved by modifying software setting parameters, the encrypted data frames are sent by the equipment maintenance device connected to the unit network on an after-sale engineering processing site for multi-split equipment adopting CAN communication by means of the non-master characteristic of CAN communication data, so that parameter setting data CAN be modified quickly, the after-sale problems are solved, and stable and reliable operation of the unit is guaranteed.
Example 2
In a preferred embodiment 2 of the present invention, an equipment maintenance method is provided, which is applied to the equipment maintenance apparatus in the above embodiment 1. Specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S302-S306:
s302: identifying communication parameters of the CAN bus, and communicating with the CAN bus according to the communication parameters;
s304: obtaining maintenance data;
s306: and sending the maintenance data to the CAN bus so as to maintain the equipment.
In the embodiment, by using the no-main characteristic of the CAN bus communication network, for the multi-split equipment adopting CAN bus communication, after the multi-split equipment is accessed to the equipment maintenance device in the after-sale engineering processing field, the after-sale problem is quickly solved, the stable and reliable operation of the unit is ensured, and the problems of long time consumption and low efficiency of the after-sale processing mode in the prior art are effectively solved.
As described in embodiment 1, in order to avoid possible data leakage, the transmitted data needs to be encrypted, that is, the maintenance data is a maintenance data frame cipher text. Before sending the maintenance data to the CAN bus, the method further comprises: and decrypting the maintenance data frame ciphertext to obtain the maintenance data frame.
After decryption, sending the maintenance data to the CAN bus comprises: and sending the maintenance data frame to the CAN bus.
Based on the maintenance data frame cipher text, obtaining maintenance data, including: popping up an input interface after the equipment maintenance device is powered on and operated; and after monitoring that the user input is finished, acquiring a maintenance data frame ciphertext input by the user.
Another device maintenance method is further provided in preferred embodiment 2 of the present invention, specifically, fig. 4 shows an optional flowchart of the method, and as shown in fig. 4, the method includes the following steps S402 to S412:
s402: on an after-sale engineering site, the equipment maintenance device is electrified and operated;
s404: after the equipment maintenance device is powered on and operated, the communication interface of the equipment maintenance device is accessed into a unit equipment network;
s406: a communication part module of the equipment maintenance device identifies communication parameters such as communication baud rate, polarity and the like of the CAN bus network of the equipment, and further keeps communication with unit equipment;
s408: entering a data sending page of the equipment maintenance device, inputting a received data frame cipher text, and setting data related to a sent data frame;
s410: a decryption module of the equipment maintenance device decrypts the input data frame ciphertext to obtain a decrypted maintenance data frame, wherein the decrypted maintenance data frame comprises a data frame arbitration ID, a data area length and data area data;
s412: and after the decrypted maintenance data frame is obtained, the maintenance data frame is sent to the bus.
The equipment maintenance device has a perfect data receiving and sending function, so that after data frame sending processing is carried out on part of after-sale problems, the processed result can be obtained on site through the received equipment data, and the efficiency of after-sale processing can be improved in a wider area.
The program itself of the device for receiving the data transmitted from the device maintenance apparatus according to the present invention needs to have a function of receiving the data transmitted from the device maintenance apparatus and processing the data. It is common practice to establish a well-established data protocol during the development phase, which contains all possible functions and parameter settings, such as noise frequency masking points, masking functions, etc., so that the data settings of the equipment maintenance device can be received.
The foregoing process is mainly a sending process of a maintenance data frame in an engineering field, and in a preferred embodiment 2 of the present invention, a maintenance data generating method is further provided, specifically, fig. 5 shows an optional flowchart of the method, and as shown in fig. 5, the method includes the following steps S502 to S508:
s502: acquiring operation data of equipment;
s504: determining a maintenance scheme according to the operating data;
s506: generating a maintenance data frame according to the maintenance scheme and the protocol requirement of the CAN bus;
s508: and encrypting the maintenance data frame to generate a maintenance data frame cipher text.
In the embodiment, by using the no-main characteristic of the CAN bus communication network, for the multi-split equipment adopting CAN bus communication, after the multi-split equipment is accessed to the equipment maintenance device in the after-sale engineering processing field, the after-sale problem is quickly solved, the stable and reliable operation of the unit is ensured, and the problems of long time consumption and low efficiency of the after-sale processing mode in the prior art are effectively solved.
After generating the maintenance data frame cipher text, the method further comprises the following steps: and responding to the acquisition request of the user, and providing the maintenance data frame ciphertext to the user.
Specifically, fig. 6 shows an alternative flowchart of the maintenance data generation method, and as shown in fig. 6, the method includes the following steps S602 to S612:
s602: when the after-sale problem occurs to the multi-online equipment, the problem phenomenon and the unit operation data are sent back to a product design department for reason analysis;
s604: the product design part carries out reason analysis according to the phenomenon of after-sale problems and unit operation data, finds out the reasons of the problems, provides a solution, and then carries out actual verification on the solution to determine the feasibility of the solution;
s606: after the solution is determined, judging whether the solution can be solved by modifying the setting parameters;
s608: if the after-sale problem can be solved by methods of modifying parameter setting, shielding noise frequency points and the like, determining parameter data needing to be modified;
s610: and generating a maintenance data frame according to the CAN protocol requirement and the parameter data needing to be modified. The maintenance data frame comprises an arbitration ID, a data area length and data of the data area;
s612: and encrypting the data frame to generate an encrypted data frame ciphertext. And then the data frame ciphertext content is provided to engineering field processing personnel.
When after-sale problems occur, particularly when the problems need to be solved by modifying software setting parameters, parameter setting data needing to be modified CAN be formed into data frames according to protocol requirements, then data encryption is carried out according to an agreed encryption and decryption mode, then the content of the encrypted data frames is sent to engineering field processing personnel, and in an engineering after-sale processing field, the engineering personnel firstly connect the device to a CAN bus network of a unit, then input received data, fill in a sending area, and then carry out data sending operation. The result of modifying the parameter setting data is realized, the after-sale problem is quickly solved, and the stable operation of the unit is ensured.
Example 3
Based on the device maintenance method provided in the above embodiment 2, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer-executable instructions for performing the device maintenance method as described above when executed by a computer processor.
In the embodiment, by using the no-main characteristic of the CAN bus communication network, for the multi-split equipment adopting CAN bus communication, after the multi-split equipment is accessed to the equipment maintenance device in the after-sale engineering processing field, the after-sale problem is quickly solved, the stable and reliable operation of the unit is ensured, and the problems of long time consumption and low efficiency of the after-sale processing mode in the prior art are effectively solved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (14)
1. An equipment maintenance device, wherein the equipment uses a CAN bus for communication, the equipment maintenance device comprising:
the acquisition module is used for acquiring maintenance data;
and the communication module is connected with the acquisition module and used for accessing the CAN bus and sending the maintenance data to the CAN bus so as to maintain the equipment.
2. The apparatus of claim 1, wherein the obtaining module comprises:
the input interface is used for acquiring the maintenance data input by the user;
and the display interface is used for displaying the maintenance data and/or the data change of the equipment.
3. The apparatus of claim 1, wherein the maintenance data is a maintenance data frame cipher; the device further comprises:
and the decryption module is connected with the acquisition module and used for decrypting the maintenance data frame ciphertext to acquire the maintenance data frame.
4. The apparatus of claim 3, wherein the communication module comprises:
the receiving port is connected with the decryption module and used for receiving the maintenance data frame;
and the sending port is used for identifying the communication parameters of the CAN bus, communicating with the CAN bus according to the communication parameters and sending the maintenance data frame to the CAN bus.
5. The apparatus of claim 4, wherein the communication parameters comprise at least: baud rate and polarity.
6. The apparatus of claim 3 or 4, wherein the maintenance data frame comprises:
arbitration ID, data zone length, and data zone data.
7. The apparatus of claim 1, further comprising:
and the power supply module is used for supplying power to the equipment maintenance device.
8. An equipment maintenance method applied to the equipment maintenance device according to any one of claims 1 to 7, characterized by comprising:
identifying communication parameters of a CAN bus, and communicating with the CAN bus according to the communication parameters;
obtaining maintenance data;
and sending the maintenance data to the CAN bus so as to maintain the equipment.
9. The method of claim 8, wherein the maintenance data is a maintenance data frame cipher; before sending the maintenance data to the CAN bus, the method further includes:
and decrypting the maintenance data frame ciphertext to obtain the maintenance data frame.
10. The method of claim 9, wherein sending the maintenance data to the CAN bus comprises:
and sending the maintenance data frame to the CAN bus.
11. The method of claim 9, wherein obtaining maintenance data comprises:
popping up an input interface after the equipment maintenance device is powered on and operated;
and after monitoring that the user input is finished, acquiring the maintenance data frame ciphertext input by the user.
12. The method of claim 9, prior to said obtaining maintenance data, comprising:
acquiring operation data of the equipment;
determining a maintenance scheme according to the operation data;
generating the maintenance data frame according to the maintenance scheme and the protocol requirement of the CAN bus;
and encrypting the maintenance data frame to generate the maintenance data frame cipher text.
13. The method of claim 12, further comprising, after the generating the maintenance data frame cipher text:
and responding to the acquisition request of the user, and providing the maintenance data frame ciphertext to the user.
14. A storage medium containing computer-executable instructions for performing the device maintenance method of any one of claims 8 to 13 when executed by a computer processor.
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| CN202011027140.XA CN112187601A (en) | 2020-09-25 | 2020-09-25 | Device and method for maintaining equipment based on CAN bus communication |
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Application publication date: 20210105 |