CN112000079A - CAN bus node simulation equipment, system and fault simulation method - Google Patents
CAN bus node simulation equipment, system and fault simulation method Download PDFInfo
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- CN112000079A CN112000079A CN202010836048.1A CN202010836048A CN112000079A CN 112000079 A CN112000079 A CN 112000079A CN 202010836048 A CN202010836048 A CN 202010836048A CN 112000079 A CN112000079 A CN 112000079A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0262—Confirmation of fault detection, e.g. extra checks to confirm that a failure has indeed occurred
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
One embodiment of the invention discloses CAN bus node simulation equipment, a system and a fault simulation method. The apparatus comprises: the system comprises an embedded module, a switch module and a power supply adaptation module; each embedded module provides one path of network interface and two paths of CAN bus interfaces, and the one path of network interface is connected with the switch module; the two paths of CAN bus interfaces are divided into a first path of bus interface and a second path of bus interface, the first path of bus interface of each embedded module is connected and externally leads out a first group of CAN bus channels, and the second path of bus interface of each embedded module is connected and externally leads out a second group of CAN bus channels; the switch module is connected with the embedded module and the power supply adaptation module through the power supply interface and is led out through the main network interface; the power supply adaptation module converts the first voltage into a second voltage for all the embedded modules and the switch modules in the equipment to use, wherein the first voltage is greater than the second voltage.
Description
Technical Field
The invention relates to the field of CAN communication, in particular to CAN bus node simulation equipment, a CAN bus node simulation system and a CAN bus node fault simulation method.
Background
The CAN bus node simulation equipment is mainly used for carrying out transceiving simulation on each single-machine CAN bus of a cabin, and simulating various CAN bus faults by injecting or changing frame codes through upper computer remote software.
In the operation process of a certain cabin, emergency measures need to be made for various fault modes in the whole system, so that the fault modes need to be simulated and tested in the ground test process. The CAN bus node simulation equipment is used as a combination under a cabin body comprehensive test system, CAN simulate the fault mode of each single machine on a cabin body, and assists the comprehensive test system to complete the test of the fault mode of the cabin body.
Disclosure of Invention
The invention aims to provide CAN bus node simulation equipment capable of simulating any CAN equipment, which is mainly used for carrying out transceiving simulation on each single-machine CAN bus of a cabin and simulating various CAN bus faults by injecting or changing frame codes through upper computer remote software.
It is a further object of this invention to provide a CAN bus fault simulation system.
It is another object of the invention to provide a method for fault simulation using the system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a CAN bus node emulation device, comprising: the system comprises an embedded module, a switch module and a power supply adaptation module;
each embedded module provides one path of network interface and two paths of CAN bus interfaces, and the one path of network interface is connected with the switch module; the two paths of CAN bus interfaces are divided into a first path of bus interface and a second path of bus interface, the first path of bus interface of each embedded module is connected and externally leads out a first group of CAN bus channels, and the second path of bus interface of each embedded module is connected and externally leads out a second group of CAN bus channels;
the switch module is connected with the embedded module and the power supply adaptation module through the power supply interface and is led out through the main network interface;
the power supply adaptation module converts the first voltage into a second voltage for all the embedded modules and the switch modules in the equipment to use, wherein the first voltage is greater than the second voltage.
In a specific embodiment, the equipment adopts four embedded modules which are inserted, and each embedded module simulates 1-2 pieces of equipment.
A CAN bus fault simulation system, the system comprising:
the CAN bus node simulation equipment is used for simulating the CAN bus node;
the upper computer is used for injecting or changing frame codes into the upper computer remote control software to simulate various CAN bus faults;
and the simulated equipment is used for receiving the instruction injected in the embedded module.
In a specific embodiment, the upper computer remote control software is developed based on CVI software and is used for remotely controlling, configuring, displaying and storing the equipment.
A method for simulating faults by using a CAN bus fault simulation system comprises the following steps:
software in an embedded module in the equipment is divided into four parts, wherein the software in each embedded module corresponds to one part of the embedded module, and the software is developed by adopting KeilMDK-ARM uVison 5;
after the software development is finished, the software is directly downloaded to an STM32 processor of the embedded module, and the software is automatically powered on;
the upper computer is connected with a network led out from the switch module through a main network interface, and frame codes are injected or changed in upper computer remote control software to simulate various CAN bus faults;
and the CAN bus network of the simulated equipment is connected with the embedded module, a first group of CAN bus channels and a second group of CAN bus channels are led out externally, and CAN instructions injected into the embedded module are received and fed back.
In one embodiment, each embedded module simulates 1-2 devices.
In a specific embodiment, each of the embedded modules is configured with an independent IP address.
In one embodiment, only one of the simulated devices is capable of responding to CAN commands from the embedded module's processor at a time.
The invention has the following beneficial effects:
the design method of the CAN bus node simulation equipment starts, and comprehensively considers the universal design requirements of multiple models. The equipment adopts an embedded module, a network switch and a power adapter integrated structure, software in the embedded module is developed by adopting Keil MDK-ARM uVison5, the software is directly downloaded into an STM32 processor of the embedded module after being developed, the power-on automatic operation is realized, the starting time is shorter, the system reliability is higher, and the CAN bus communication delay caused by the system software processing time is greatly reduced.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a CAN bus fault simulation system schematic according to an embodiment of the present application.
Fig. 2 shows a schematic diagram of a CAN bus node simulation device according to an embodiment of the present application.
Fig. 3 shows a flow diagram of a method for fault simulation using a CAN bus fault simulation system according to an embodiment of the present application.
Fig. 4 shows a schematic diagram of an upper computer remote control software interface according to an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Fig. 1 shows a CAN bus fault simulation system 1 according to an embodiment of the present application, including a host computer 10, a CAN bus node simulation device 20, and a simulated device 30.
The upper computer 10 is used for injecting or changing frame codes into the upper computer remote control software to simulate various CAN bus faults. Such as short circuits, open faults of the communication lines of the CAN bus system and node faults of the CAN bus system. Those skilled in the art will appreciate that other types of fault simulation may also be included.
In a specific embodiment, the upper computer remote control software is developed based on CVI software and is mainly used for remotely controlling, configuring, displaying and storing the CAN bus node simulation device 20.
CAN bus node simulation device 20 may be used to simulate any device of the CAN. Such as CAN device a and CAN device B. Those skilled in the art will appreciate that the CAN devices may also include any other CAN devices.
The simulated device 30 is configured to receive the instructions injected in the embedded module 205.
In one particular embodiment, as shown in fig. 2, the CAN bus node emulation device 20 includes an embedded module 205, a power adaptation module 210, and a switch module 215.
Each embedded module 205 provides one network interface and two CAN bus interfaces, one network interface is connected to the switch module, the two CAN bus interfaces are divided into a first bus interface and a second bus interface, the first bus interface of each embedded module is connected and externally leads out a first set of CAN bus channels, the second bus interface of each embedded module is connected and externally leads out a second set of CAN bus channels, for example, the two CAN bus interfaces of each embedded module are divided into two bus interfaces a and B, and externally leads out two sets of CAN bus channels a and B which are connected to the CAN bus network of the simulated device 30.
In a specific embodiment, the CAN bus node simulation device 20 is inserted with four embedded modules 205, and each embedded module 205 CAN simulate 1-2 devices.
In a specific embodiment, the power adapter module converts the first voltage into a second voltage for all the embedded modules and the switch modules inside the device to use, wherein the first voltage is greater than the second voltage. For example, the power adaptation module 210 converts the external 220V mains into 12V for all the embedded modules 205 and the switch module 215 inside the device.
In a specific embodiment, the switch module 215 is connected to the embedded module 205 and the power adapter module 210 through a power supply interface, and is externally led out through a main network interface, and the network interface is connected to the upper computer 1.
As shown in fig. 3, a method for simulating a fault by using a CAN bus fault simulation system 1 according to an embodiment of the present invention includes the following steps:
software in four embedded modules 205 in the CAN bus node simulation equipment 20 is divided into four parts, one piece of software is designed in each embedded module 205, and the software in the embedded modules 205 is developed by adopting KeilMDK-ARM uVison 5.
In a specific embodiment, each embedded module 205 simulates 1-2 devices, and each embedded module 205 is configured with an independent IP address.
In a specific embodiment, the software is directly downloaded to the STM32 processor of the embedded module 205 after being developed, and is automatically powered on.
In a specific embodiment, as shown in fig. 4, which is a schematic diagram of an interface of upper computer remote control software, the upper computer 1 injects or changes frame codes into the upper computer remote control software to simulate various CAN bus faults.
In a specific embodiment, the CAN bus network of the simulated device is connected with the embedded module, and a first group of CAN bus channels and a second group of CAN bus channels are led out externally, and the CAN bus network receives and feeds back a CAN instruction injected in the embedded module. For example, the CAN bus network of the simulated device 30 is connected to the embedded module 205 to externally extract two sets of CAN bus channels a and B, and receives and feeds back the CAN instruction injected in the embedded module 205.
In one embodiment, only one type of device being simulated at a time CAN respond to CAN commands from the processor of the embedded module 205.
The design method of the CAN bus node simulation equipment starts, and comprehensively considers the universal design requirements of multiple models. The equipment adopts an embedded module, a network switch and a power adapter integrated structure, software in the embedded module is developed by adopting Keil MDK-ARM uVison5, the software is directly downloaded into an STM32 processor of the embedded module after being developed, the power-on automatic operation is realized, the starting time is shorter, the system reliability is higher, and the CAN bus communication delay caused by the system software processing time is greatly reduced.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (8)
1. A CAN bus node emulation device, comprising: the system comprises an embedded module, a switch module and a power supply adaptation module;
each embedded module provides one path of network interface and two paths of CAN bus interfaces, and the one path of network interface is connected with the switch module; the two paths of CAN bus interfaces are divided into a first path of bus interface and a second path of bus interface, the first path of bus interface of each embedded module is connected and externally leads out a first group of CAN bus channels, and the second path of bus interface of each embedded module is connected and externally leads out a second group of CAN bus channels;
the switch module is connected with the embedded module and the power supply adaptation module through the power supply interface and is led out through the main network interface;
the power supply adaptation module converts the first voltage into a second voltage for all the embedded modules and the switch modules in the equipment to use, wherein the first voltage is greater than the second voltage.
2. The device of claim 1, wherein four embedded modules are inserted into the device, and each embedded module simulates 1-2 devices.
3. A CAN bus fault simulation system, comprising:
the apparatus of any one of claims 1-2;
the upper computer is used for injecting or changing frame codes into the upper computer remote control software to simulate various CAN bus faults;
and the simulated equipment is used for receiving the instruction injected in the embedded module.
4. The system of claim 3, wherein the upper computer remote control software is developed based on CVI software for remote control, configuration, display and storage of the device.
5. A method of fault simulation using the system of claim 3, comprising the steps of:
software in an embedded module in the equipment is divided into four parts, wherein the software in each embedded module corresponds to one part of the embedded module, and the software is developed by adopting KeilMDK-ARM uVison 5;
after the software development is finished, the software is directly downloaded to an STM32 processor of the embedded module, and the software is automatically powered on;
the upper computer is connected with a network led out from the switch module through a main network interface, and frame codes are injected or changed in upper computer remote control software to simulate various CAN bus faults;
and the CAN bus network of the simulated equipment is connected with the embedded module, a first group of CAN bus channels and a second group of CAN bus channels are led out externally, and CAN instructions injected into the embedded module are received and fed back.
6. The method of claim 5, wherein each embedded module simulates 1-2 devices.
7. The method of claim 5, wherein each embedded module is configured with a separate IP address.
8. The method of claim 5 wherein only one of the simulated devices is capable of responding to CAN commands from the embedded module's processor at a time.
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| CN112000079B (en) | 2021-12-07 |
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