CN116886350A - New energy automobile control working method - Google Patents
New energy automobile control working method Download PDFInfo
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- CN116886350A CN116886350A CN202310795827.5A CN202310795827A CN116886350A CN 116886350 A CN116886350 A CN 116886350A CN 202310795827 A CN202310795827 A CN 202310795827A CN 116886350 A CN116886350 A CN 116886350A
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000000737 periodic effect Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 45
- 238000003745 diagnosis Methods 0.000 claims description 40
- 238000012360 testing method Methods 0.000 claims description 40
- 230000005856 abnormality Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000009191 jumping Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 123
- 238000010586 diagram Methods 0.000 description 10
- 230000001052 transient effect Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 6
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- 101000734572 Homo sapiens Phosphoenolpyruvate carboxykinase, cytosolic [GTP] Proteins 0.000 description 1
- 102100034796 Phosphoenolpyruvate carboxykinase, cytosolic [GTP] Human genes 0.000 description 1
- 101000701286 Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) Alkanesulfonate monooxygenase Proteins 0.000 description 1
- 101100420795 Schizosaccharomyces pombe (strain 972 / ATCC 24843) sck1 gene Proteins 0.000 description 1
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Classifications
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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
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic
- H04L63/1416—Event detection, e.g. attack signature detection
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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
- H04L12/40006—Architecture of a communication node
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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
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic
- H04L63/1425—Traffic logging, e.g. anomaly detection
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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
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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
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
Abstract
The invention provides a new energy automobile control working method, which comprises the following steps: step A: collecting all periodic messages of the whole vehicle local area network through a signal receiving and transmitting unit; and (B) step (B): corresponding each message period with the message ID through a signal period analysis unit; step C: detecting the load rate a of the bus unauthorised forwarding bus through a bus load detection unit; step D: and sending a message with the period of 10ms and undefined ID (identity) of the whole vehicle function through the signal receiving and transmitting unit, so that the bus load reaches a+10% and a+10% is less than 70%, and observing whether the whole vehicle function is abnormal or not after the state lasts for 1 minute. The invention CAN achieve the aim of attack by increasing the CAN load rate, and verify the stability of the ECU.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted network attack testing, in particular to a new energy automobile control working method.
Background
With the development of the internet of vehicles technology, the safety of the vehicle-mounted network is paid more attention to, the safety of the vehicle-mounted network system is related to the life and property safety of users, and if the vehicle-mounted network system is attacked maliciously, the whole system network cannot work normally, so that enterprise clients suffer significant losses. In order to improve the safety and stability of the CAN network, problems are found by network attack means in various aspects, and measures are taken in time to avoid risks.
The CAN is a serial communication protocol bus for real-time application and effectively supporting a distributed control system, is one of the most widely used field buses in global application, has high real-time property and strong anti-interference capability, and is suitable for automobiles and industrial control applications. The CAN bus adopts a communication mechanism of carrier sense multiple access/collision avoidance, and a self-receiving periodic message sending strategy leads to the need of ensuring the bus load rate to be about 40% when the bus is designed, otherwise, the bus message period is abnormal correspondingly.
Disclosure of Invention
The invention aims at least solving the technical problems existing in the prior art, and particularly creatively provides a new energy automobile control working method.
In order to achieve the above purpose of the present invention, the present invention provides a new energy automobile control working method, which achieves the purpose of attack by improving the load factor to manufacture a fault of bus signal delay, the test method comprises the following steps:
step A: collecting all periodic messages of the whole vehicle local area network through a signal receiving and transmitting unit;
and (B) step (B): corresponding each message period with the message ID through a signal period analysis unit;
step C: detecting the load rate a of the bus unauthorised forwarding bus through a bus load detection unit;
step D: through the signal receiving and transmitting unit, a message with the period of 10ms and the undefined ID of the whole vehicle function is transmitted, so that the bus load reaches a+10%, a+10% is less than 70%, the state lasts for 1 minute, whether the whole vehicle function is abnormal or not is observed, if the whole vehicle function is abnormal, the step E is skipped, and if the whole vehicle function is not abnormal, the step D is skipped;
step E: stopping the signal receiving and transmitting unit to transmit the message, starting the signal receiving and transmitting unit to transmit the message, increasing the load rate by 1%, recording the load rate and fault at the moment until the abnormality is observed, and performing the next fault attack after a=a+10% of attack succeeds, and jumping to the step D to perform the next fault attack.
In a preferred embodiment of the present invention, the above-mentioned step D and step E execute the following operations while executing the test method:
observing the current state of the tested equipment, judging whether the obtained current state accords with the expected state, if so, not making any further judgment, otherwise, judging that the state of the CAN tested equipment is changed due to an aggressiveness test;
and (3) observing and analyzing the period delay condition of each message and the attack degree of each controller due to the increase of the load.
The invention also discloses a new energy automobile control work test box, which comprises a diagnosis box body, wherein a PCB diagnosis circuit board fixed mounting seat for fixedly mounting a PCB diagnosis circuit board is arranged in the diagnosis box body, the PCB diagnosis circuit board is fixedly mounted on the PCB diagnosis circuit board fixed mounting seat, and a microcontroller U1, a USB data transmission module, a CAN data transmission module and an RS232 data transmission module are arranged on the PCB diagnosis circuit board;
the front face of the diagnosis box body is provided with a touch display screen fixing and mounting seat for fixedly mounting a touch display screen, and the touch display screen is fixedly mounted on the touch display screen fixing and mounting seat; the diagnosis box comprises a diagnosis box body, wherein a USB interface mounting seat for fixedly mounting a USB interface JP4 is arranged on the left side surface of the diagnosis box body, the USB interface JP4 is fixedly mounted on the USB interface mounting seat, CAN interface mounting seats for fixedly mounting a CAN interface JP1 and a CAN interface JP2 are arranged on the right side surface of the diagnosis box body, the CAN interface JP1 and the CAN interface JP2 are fixedly mounted on the CAN interface mounting seats, an RS232 interface mounting seat for fixedly mounting an RS232 interface JP6 is arranged on the front side surface of the diagnosis box body, and the RS232 interface JP6 is fixedly mounted on the RS232 interface mounting seat;
the USB data transmission end of the microcontroller U1 is connected with the data transmission end of the USB data transmission module, the CAN data transmission end of the microcontroller U1 is connected with the data transmission end of the CAN data transmission module, and the RS232 data transmission end of the microcontroller U1 is connected with the data transmission end of the RS232 data transmission module; the touch display end of the microcontroller U1 is connected with the touch display end of the touch display screen.
In a preferred embodiment of the present invention, the USB data transmission module includes: the power output end of the USB interface JP4 is respectively connected with the first end of the FUSE1 and the first end of the capacitor C23, the power output end of the USB interface JP4 outputs a power USB_VCC, the second end of the FUSE FUSE1 is respectively connected with the first end of the capacitor C27 and the power input end IN of the voltage reduction chip U2, the second end of the FUSE FUSE1 outputs a power +5V, the second end of the capacitor C27 is connected with the power ground, the power ground end GND of the voltage reduction chip U2 is connected with the power ground, the power output end of the voltage reduction chip U2 is respectively connected with the first end of the capacitor C26, the first end of the capacitor C28 and the first end of the FUSE FUSE2, the second end of the FUSE FUSE2 outputs a power 3V3, and the first end of the capacitor C26 and the first end of the capacitor C28 are respectively connected with the power ground;
the power output grounding end of the USB interface JP4 and the second end of the capacitor C23 are respectively connected with the power ground, the data USB negative end of the USB interface JP4 is connected with the first end of the resistor R6, the second end of the resistor R6 is respectively connected with the first end of the capacitor C24 and the USB data negative end DDM of the microcontroller U1, the data USB positive end of the USB interface JP4 is respectively connected with the first end of the resistor R5 and the first end of the resistor R7, the second end of the resistor R7 is respectively connected with the first end of the capacitor C25 and the USB data positive end DDP of the microcontroller U1, the second end of the capacitor C24 and the second end of the capacitor C25 are respectively connected with the power ground, the second end of the resistor R5 is connected with the collector of the triode Q1, the emitter of the triode Q1 is respectively connected with the power 3V3 and the first end of the resistor R16, and the second end of the resistor R17 is respectively connected with the USB control enabling end PA 8/RTSP 0/NPCS 3 of the microcontroller U1.
In a preferred embodiment of the invention, the CAN data transmission module comprises: the data receiving end RXD of the CAN transceiver U7 is respectively connected with the first end of the resistor R3 and the CAN data transmitting end PA19/CANRX of the microcontroller U1, and the data transmitting end TXD of the CAN transceiver U7 is connected with the CAN data receiving end PA20/CANTX of the microcontroller U1;
the power end VCC of the CAN transceiver U7 is respectively connected with a power supply +5V, the first end of a capacitor C21 and the first end of a capacitor C22, the second end of the capacitor C21 and the second end of the capacitor C22 are respectively connected with power supply ground, the grounding end GND of the CAN transceiver U7 is connected with the power supply ground, and the mode end RS of the CAN transceiver U7 is connected with the additional CAN mode end PA18/SPI0_SPCK of the microcontroller U1;
the CAN data high end CANH of the CAN transceiver U7 is respectively connected with the data high end of the CAN interface JP1 and the data high end of the CAN interface JP2, the CAN data low end CANL of the CAN transceiver U7 is respectively connected with the data low end of the CAN interface JP2 and the first end of the adjustable terminal resistor R4, and the second end of the adjustable terminal resistor R4 is connected with the data low end of the CAN interface JP 1.
In a preferred embodiment of the present invention, the RS232 data transmission module includes: the charge pump end V+ of the RS232 chip U3 is connected with the first end of the capacitor C30, the second end of the capacitor C30 is connected with the power ground, the positive end C1+ of the voltage doubling capacitor of the RS232 chip U3 is connected with the first end of the capacitor C32, the voltage doubling capacitor Rong Fuduan C1-of the RS232 chip U3 is connected with the second end of the capacitor C32, the transmitter input end T1in of the RS232 chip U3 is connected with the data end PA1/TXD0 of the microcontroller U1, the receiver output end R1out of the RS232 chip U3 is connected with the data end PA0/RXD0 of the microcontroller U1, the transmitter input end T2in of the RS232 chip U3 is connected with the data end PA28/DTXD 3 of the microcontroller U1, the receiver output end R2 of the RS232 chip U3 is connected with the data end PA27/DRXD/PCK3 of the microcontroller U1, the charge pump end V-of the RS232 chip U3 is connected with the first end of the capacitor C33, and the second end of the capacitor C33 is connected with the power ground;
the power end VCC of the RS232 chip U3 is connected with a power supply 3V3 and a first end of a capacitor C29 respectively, a second end of the capacitor C29 is connected with power supply ground, a voltage doubling capacitor Rong Fuduan C2-of the RS232 chip U3 is connected with a first end of the capacitor C31, a voltage doubling capacitor positive end C2+ of the RS232 chip U3 is connected with a second end of the capacitor C31, a transmitter output end T1out of the RS232 chip U3 is connected with a data receiving end of an RS232 interface JP6, a receiver input end R1out of the RS232 chip U3 is connected with a data transmitting end of the RS232 interface JP6, a grounding end of the RS232 interface JP6 is connected with power supply ground, a transmitter output end T2out of the RS232 chip U3 is connected with a data receiving end of an RS232 interface JP7, and a grounding end of the RS232 interface JP7 is connected with power supply ground; the ground GND of the RS232 chip U3 is connected to the power ground.
The invention also discloses a new energy automobile control working system, which comprises a vehicle to be diagnosed, an upper computer and a new energy automobile control working test box;
the new energy automobile control work test box is connected with the vehicle to be diagnosed through a CAN bus, and is connected with the upper computer through a USB;
the system also comprises a signal receiving and transmitting unit, a signal period analysis unit and a bus load rate detection unit;
the signal receiving and transmitting unit is used for transmitting a message with higher priority, so that the bus load rate is gradually increased to reach the attack condition;
the signal period analysis unit is used for analyzing whether the message period has a large delay or not and exceeds the maximum tolerable range of the ECU so as to cause the function of the whole vehicle to be abnormal;
the bus load rate detection unit is used for observing the bus load rate condition so as to judge the attack abnormality of the less type which occurs at each stage of the load rate, and is convenient for later analysis and correction.
In summary, by adopting the technical scheme, the invention CAN achieve the attack purpose by increasing the CAN load rate, and verify the stability of the ECU.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic block diagram of a flow of the present invention.
Fig. 2 is a schematic block diagram of the connection of the present invention.
Fig. 3 is a schematic circuit connection diagram of a USB data transmission module according to the present invention.
Fig. 4 is a schematic circuit connection diagram of the CAN data transmission module of the present invention.
Fig. 5 is a schematic diagram of circuit connection of the RS232 data transmission module according to the present invention.
Fig. 6 is a schematic circuit connection diagram of a data switching module according to the present invention.
FIG. 7 is a schematic diagram of a key set module circuit connection according to the present invention.
Fig. 8 is a schematic diagram of circuit connection of the indicator light assembly module according to the present invention.
FIG. 9 is a schematic diagram of the circuit connection of the test module of the present invention.
Fig. 10 is a schematic diagram of the circuit connections of the microcontroller of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The invention discloses a new energy automobile control working method, which achieves the aim of attack through the fault of the delay of a manufacturing bus signal by improving the load rate, as shown in figure 1, the testing method comprises the following steps:
step A: collecting all periodic messages of the whole vehicle local area network through a signal receiving and transmitting unit;
and (B) step (B): corresponding each message period with the message ID through a signal period analysis unit;
step C: detecting the load rate a of the bus unauthorised forwarding bus through a bus load detection unit;
step D: through the signal receiving and transmitting unit, a message with the period of 10ms and the undefined ID of the whole vehicle function is transmitted, so that the bus load reaches a+10%, a+10% is less than 70%, the state lasts for 1 minute, whether the whole vehicle function is abnormal or not is observed, if the whole vehicle function is abnormal, the step E is skipped, and if the whole vehicle function is not abnormal, the step D is skipped;
step E: stopping the signal receiving and transmitting unit to transmit the message, starting the signal receiving and transmitting unit to transmit the message, increasing the load rate by 1%, recording the load rate and fault at the moment until the abnormality is observed, and performing the next fault attack after a=a+10% of attack succeeds, and jumping to the step D to perform the next fault attack.
In a preferred embodiment of the present invention, the above-mentioned step D and step E execute the following operations while executing the test method:
observing the current state of the tested equipment, judging whether the obtained current state accords with the expected state, if so, not making any further judgment, otherwise, judging that the state of the CAN tested equipment is changed due to an aggressiveness test;
and (3) observing and analyzing the period delay condition of each message and the attack degree of each controller due to the increase of the load.
The invention also discloses a new energy automobile control work test box, which comprises a diagnosis box body, wherein a PCB diagnosis circuit board fixed mounting seat for fixedly mounting a PCB diagnosis circuit board is arranged in the diagnosis box body, the PCB diagnosis circuit board is fixedly mounted on the PCB diagnosis circuit board fixed mounting seat, and as shown in figures 2-10, a microcontroller U1, a USB data transmission module, a CAN data transmission module, an RS232 data transmission module, a key set module and an indicator lamp set module are arranged on the PCB diagnosis circuit board;
the front of the diagnosis box body is provided with a touch display screen fixed mounting seat for fixedly mounting a touch display screen, a key set mounting seat for fixedly mounting a key set, and an indicator lamp set mounting seat for fixedly mounting an indicator lamp set, wherein the touch display screen is fixedly mounted on the touch display screen fixed mounting seat, the key set is fixedly mounted on the key set mounting seat, and the indicator lamp set is fixedly mounted on the indicator lamp set mounting seat; the diagnosis box comprises a diagnosis box body, wherein a USB interface mounting seat for fixedly mounting a USB interface JP4 is arranged on the left side surface of the diagnosis box body, the USB interface JP4 is fixedly mounted on the USB interface mounting seat, CAN interface mounting seats for fixedly mounting a CAN interface JP1 and a CAN interface JP2 are arranged on the right side surface of the diagnosis box body, the CAN interface JP1 and the CAN interface JP2 are fixedly mounted on the CAN interface mounting seat, an RS232 interface mounting seat for fixedly mounting an RS232 interface JP6 is arranged on the front side surface of the diagnosis box body, an RS232 interface JP6 is fixedly mounted on the RS232 interface mounting seat, a test interface mounting seat for fixedly mounting a test interface JP1 is arranged on the rear side surface of the diagnosis box body, and the test interface JP1 is fixedly mounted on the test interface mounting seat;
the USB data transmission end of the microcontroller U1 is connected with the data transmission end of the USB data transmission module, the CAN data transmission end of the microcontroller U1 is connected with the data transmission end of the CAN data transmission module, the RS232 data transmission end of the microcontroller U1 is connected with the data transmission end of the RS232 data transmission module, the key group end of the microcontroller U1 is connected with the key end of the key group module, and the indication lamp group end of the microcontroller U1 is connected with the indication end of the indication lamp group module; the touch display end of the microcontroller U1 is connected with the touch display end of the touch display screen.
In a preferred embodiment of the present invention, the USB data transmission module includes: the power output end of the USB interface JP4 is respectively connected with the first end of the FUSE1 and the first end of the capacitor C23, the power output end of the USB interface JP4 outputs a power USB_VCC, the second end of the FUSE FUSE1 is respectively connected with the first end of the capacitor C27 and the power input end IN of the voltage reduction chip U2, the second end of the FUSE FUSE1 outputs a power +5V, the second end of the capacitor C27 is connected with the power ground, the power ground end GND of the voltage reduction chip U2 is connected with the power ground, the power output end of the voltage reduction chip U2 is respectively connected with the first end of the capacitor C26, the first end of the capacitor C28 and the first end of the FUSE FUSE2, the second end of the FUSE FUSE2 outputs a power 3V3, and the first end of the capacitor C26 and the first end of the capacitor C28 are respectively connected with the power ground;
the power output grounding end of the USB interface JP4 and the second end of the capacitor C23 are respectively connected with the power ground, the data USB negative end of the USB interface JP4 is connected with the first end of the resistor R6, the second end of the resistor R6 is respectively connected with the first end of the capacitor C24 and the USB data negative end DDM of the microcontroller U1, the data USB positive end of the USB interface JP4 is respectively connected with the first end of the resistor R5 and the first end of the resistor R7, the second end of the resistor R7 is respectively connected with the first end of the capacitor C25 and the USB data positive end DDP of the microcontroller U1, the second end of the capacitor C24 and the second end of the capacitor C25 are respectively connected with the power ground, the second end of the resistor R5 is connected with the collector of the triode Q1, the emitter of the triode Q1 is respectively connected with the power 3V3 and the first end of the resistor R16, and the second end of the resistor R17 is respectively connected with the USB control enabling end PA 8/RTSP 0/NPCS 3 of the microcontroller U1. The resistance of the resistor R16 is 47K, the resistance of the resistor R17 is 1.2K, the model of the triode Q1 is 8550S, the resistance of the resistor R5 is 1.5K, the resistances of the resistor R6 and the resistor R7 are 25 omega, the capacitance of the capacitor C24 and the capacitor C25 is 15pF, the capacitance of the capacitor C23 is 100nF, the capacitance of the capacitor C27 and the capacitor C28 is 47uF, the capacitance of the capacitor C26 is 0.1F, and the model of the buck chip U2 is REG1117-3.3.
In a preferred embodiment of the invention, the CAN data transmission module comprises: the data receiving end RXD of the CAN transceiver U7 is respectively connected with the first end of the resistor R3 and the CAN data transmitting end PA19/CANRX of the microcontroller U1, and the data transmitting end TXD of the CAN transceiver U7 is connected with the CAN data receiving end PA20/CANTX of the microcontroller U1;
the power end VCC of the CAN transceiver U7 is respectively connected with a power supply +5V, the first end of a capacitor C21 and the first end of a capacitor C22, the second end of the capacitor C21 and the second end of the capacitor C22 are respectively connected with power supply ground, the grounding end GND of the CAN transceiver U7 is connected with the power supply ground, and the mode end RS of the CAN transceiver U7 is connected with the additional CAN mode end PA18/SPI0_SPCK of the microcontroller U1;
the CAN data high end CANH of the CAN transceiver U7 is respectively connected with the data high end of the CAN interface JP1 and the data high end of the CAN interface JP2, the CAN data low end CANL of the CAN transceiver U7 is respectively connected with the data low end of the CAN interface JP2 and the first end of the adjustable terminal resistor R4, and the second end of the adjustable terminal resistor R4 is connected with the data low end of the CAN interface JP 1. The resistance value of the resistor R3 is 1.5K, the model of the CAN transceiver U7 is TJA1050, the capacitor C21 is 104, the capacitance value of the capacitor C22 is 10uF, and the resistance value of the adjustable termination resistor R4 is 120Ω.
In a preferred embodiment of the present invention, the RS232 data transmission module includes: the charge pump end V+ of the RS232 chip U3 is connected with the first end of the capacitor C30, the second end of the capacitor C30 is connected with the power ground, the positive end C1+ of the voltage doubling capacitor of the RS232 chip U3 is connected with the first end of the capacitor C32, the voltage doubling capacitor Rong Fuduan C1-of the RS232 chip U3 is connected with the second end of the capacitor C32, the transmitter input end T1in of the RS232 chip U3 is connected with the data end PA1/TXD0 of the microcontroller U1, the receiver output end R1out of the RS232 chip U3 is connected with the data end PA0/RXD0 of the microcontroller U1, the transmitter input end T2in of the RS232 chip U3 is connected with the data end PA28/DTXD 3 of the microcontroller U1, the receiver output end R2 of the RS232 chip U3 is connected with the data end PA27/DRXD/PCK3 of the microcontroller U1, the charge pump end V-of the RS232 chip U3 is connected with the first end of the capacitor C33, and the second end of the capacitor C33 is connected with the power ground;
the power end VCC of the RS232 chip U3 is connected with a power supply 3V3 and a first end of a capacitor C29 respectively, a second end of the capacitor C29 is connected with power supply ground, a voltage doubling capacitor Rong Fuduan C2-of the RS232 chip U3 is connected with a first end of the capacitor C31, a voltage doubling capacitor positive end C2+ of the RS232 chip U3 is connected with a second end of the capacitor C31, a transmitter output end T1out of the RS232 chip U3 is connected with a data receiving end of an RS232 interface JP6, a receiver input end R1out of the RS232 chip U3 is connected with a data transmitting end of the RS232 interface JP6, a grounding end of the RS232 interface JP6 is connected with power supply ground, a transmitter output end T2out of the RS232 chip U3 is connected with a data receiving end of an RS232 interface JP7, and a grounding end of the RS232 interface JP7 is connected with power supply ground; the ground GND of the RS232 chip U3 is connected to the power ground. The capacitance values of the capacitor C29, the capacitor C30, the capacitor C31, the capacitor C32 and the capacitor C33 are 120nf, and the model number of the rs232 chip U3 is MAX3232.
In a preferred embodiment of the present invention, further comprising a data switching module, the data switching module comprising: the data output end of the data switching chip U6 is connected with the data receiving end PA5/RXD1 of the microcontroller U1, the data input end of the data switching chip U6 is connected with the data transmitting end PA6/TXD1 of the microcontroller U1, and the grounding end GND of the data switching chip U6 is connected with the power supply ground;
the power end of the data switching chip U6 is connected with a power supply +5V and the first end of the capacitor C34 respectively, and the second end of the capacitor C34 is connected with the power supply ground; the receiver data positive end of the data switching chip U6 is respectively connected with the first end of a resistor R9, the input end VIN2 of a transient suppressor U4 and the data first positive end of an interface JP5, the second end of the resistor R9 is connected with the power ground, the receiver data negative end of the data switching chip U6 is respectively connected with the first end of a resistor R8, the input end VIN1 of the transient suppressor U4 and the data first negative end of the interface JP5, the second end of the resistor R8 is connected with the power ground, and the ground end of the transient suppressor U4 is connected with the power ground;
the transmitter data negative terminal of the data switching chip U6 is respectively connected with the input end VIN1 of the transient suppressor U5 and the data second negative terminal of the interface JP5, the transmitter data positive terminal of the data switching chip U6 is respectively connected with the input end VIN2 of the transient suppressor U5 and the data second positive terminal of the interface JP5, and the grounding terminal of the transient suppressor U5 is connected with the power supply ground. The data switching chip U6 has a model number MAX488, the capacitor C34 has a capacitance value of 100nF, the resistors R8 and R9 have a resistance value of 3.3K, and the transient suppressor U4 and the transient suppressor U5 have a model number SM712.
In a preferred embodiment of the present invention, the key set module includes: the first end of the key S4 is connected with the first end of the power supply 3V3, the second end of the key S4 is connected with the ERASE end ERASE of the microcontroller U1, the first end of the key S2 is connected with the power supply ground, the second end of the key S2 is connected with the key end PA11/TWCK of the microcontroller U1, the first end of the key S3 is connected with the power supply ground, the second end of the key S3 is connected with the key end PA10/TWD of the microcontroller U1, the first end of the key S5 is connected with the power supply ground, and the second end of the key S5 is connected with the reset end NRST of the microcontroller U1. Wherein the model of the data switching chip U6 is MAX488, the capacitance value of the capacitor C34 is 100nF, the resistance values of the resistor R8 and the resistor R9 are 3.3K,
in a preferred embodiment of the present invention, the indicator light bank module includes: the cathode of the power indicator light LED3 is connected with power ground, the anode of the power indicator light LED3 is connected with the first end of the resistor R10, and the second end of the resistor R10 is connected with the power supply 3V 3; the negative electrode of the indicator light LED11 is connected with the power ground, the positive electrode of the indicator light LED11 is connected with the first end of the resistor R13, and the second end of the resistor R13 is connected with the indicator end PA13/SPI0_NPCS1/PCK1 of the microcontroller U1; the negative electrode of the indicator light LED22 is connected with the power ground, the positive electrode of the indicator light LED22 is connected with the first end of the resistor R14, and the second end of the resistor R14 is connected with the indicator end PA12/SPI0_NPCS0 of the microcontroller U1; the negative pole of pilot lamp LED44 links to each other with power ground, and the positive pole of pilot lamp LED44 links to each other with the first end of resistance R11, and the second end of resistance R11 links to each other with microcontroller U1's pilot terminal PA7/SCK1/SPI0_NPCS 1. The resistances of the resistors R10, R11, R13, and R14 are 2.2K.
In a preferred embodiment of the present invention, further comprising a test module, the test module comprising: the test data input end TDI of the microcontroller U1 is respectively connected with the first end of a resistor R55 and the test data output end of a test interface JP1, and the second end of the resistor R55 is connected with a power supply 3V 3; the test mode selection end TMS of the microcontroller U1 is respectively connected with the first end of the resistor R53 and the test mode selection end of the test interface JP1, and the second end of the resistor R53 is connected with the power supply 3V 3; the test clock end TCK of the microcontroller U1 is respectively connected with the first end of the resistor R51 and the test clock end of the test interface JP1, and the second end of the resistor R51 is connected with the power supply 3V 3; the test data output end of the microcontroller U1 is connected with the test data input end of the test interface JP 1; the wiper end NRST of the microcontroller U1 is respectively connected with the first end of the resistor R15 and the wiper end of the test interface JP1, and the second end of the resistor R15 is connected with the power supply 3V 3; the power supply 3V3 is connected to the first end of the resistor R57, the second end of the resistor R51 is connected to the first test end of the test interface JP1, the power supply 3V3 is connected to the second test end of the test interface JP1, and the ground end of the test interface JP1 is connected to the power supply ground. The resistance of the resistor R15 is 10K, and the resistances of the resistors R51, R53, R55, and R57 are 4.7K.
In a preferred embodiment of the present invention, the voltage stabilizing output terminal VDDOUT of the microcontroller U1 is connected to the power supply terminal VDDCORE of the microcontroller U1, the first terminal of the capacitor C3, the first terminal of the capacitor C4, the first terminal of the capacitor C5, the first terminal of the capacitor C6 and the first terminal of the capacitor C18, and the second terminal of the capacitor C3, the second terminal of the capacitor C4, the second terminal of the capacitor C5, the second terminal of the capacitor C6 and the second terminal of the capacitor C18 are connected to the power supply ground, respectively; the power supply end VDDIO of the microcontroller U1 is respectively connected with the first end of a capacitor C7, the first end of a capacitor C8, the first end of a capacitor C9, the first end of a capacitor C10, the first end of a capacitor C11 and a power supply 3V3, and the second end of the capacitor C7, the second end of the capacitor C8, the second end of the capacitor C9, the second end of the capacitor C10 and the second end of the capacitor C11 are respectively connected with power supply ground; the grounding end of the microcontroller U1 is connected with the power supply ground; the crystal oscillator end XIN of the microcontroller U1 is respectively connected with the first end of the capacitor C12 and the first end of the crystal oscillator Y1, the crystal oscillator end XOUT of the microcontroller U1 is respectively connected with the first end of the capacitor C13 and the second end of the crystal oscillator Y1, and the second end of the capacitor C12 and the second end of the capacitor C13 are respectively connected with power supply ground; the power supply end VDDCLL of the microcontroller U1 is respectively connected with the first end of the capacitor C14 and the voltage-stabilizing output end VDDOUT of the microcontroller U1, and the second end of the capacitor C14 is connected with power supply ground; the filter end of the microcontroller U1 is respectively connected with the first end of the capacitor C15 and the first end of the resistor R2, the second end of the resistor R2 is connected with the first end of the capacitor C16, and the second end of the capacitor C15 and the second end of the capacitor C16 are respectively connected with power ground; the power supply end VDDIN of the microcontroller U1 is respectively connected with a power supply 3V3, a first end of a capacitor C1 and a first end of a capacitor C17, and a second end of the capacitor C1 and a second end of the capacitor C17 are respectively connected with power supply ground; the power supply end VDDBSH of the microcontroller U1 is respectively connected with the power supply 3V3 and the first end of the capacitor C2, and the second end of the capacitor C2 is respectively connected with the power supply ground; the analog-digital voltage reference end of the microcontroller U1 is respectively connected with the first end of the capacitor C19 and the first end of the inductor L1, the second end of the inductor L1 is respectively connected with the first end of the capacitor C20 and the power supply 3V3, and the second end of the capacitor C19 and the second end of the capacitor C20 are respectively connected with the power supply ground. The capacitance value of the capacitor C18 is 10uF, the capacitance values of the capacitors C3-C11 are 100nF, the capacitance values of the capacitors C12 and C13 are 10pF, the frequency of the crystal oscillator Y1 is 18.4MHz, the capacitance value of the capacitor C15 is 1nF, the capacitance values of the capacitors C1, C2, C14, C17, C19 and C20 are 100nF, the capacitance value of the capacitor C16 is 10nF, and the model of the microcontroller U1 is ATM89C52.
The invention also discloses a new energy automobile control working system, which comprises a vehicle to be diagnosed, an upper computer and a new energy automobile control working test box;
the new energy automobile control work test box is connected with the vehicle to be diagnosed through a CAN bus, and the new energy automobile control work test box is connected with the upper computer through USB or/and RS 232;
the system also comprises a signal receiving and transmitting unit, a signal period analysis unit and a bus load rate detection unit;
the signal receiving and transmitting unit is used for transmitting a message with higher priority, so that the bus load rate is gradually increased to reach the attack condition;
the signal period analysis unit is used for analyzing whether the message period has a large delay or not and exceeds the maximum tolerable range of the ECU so as to cause the function of the whole vehicle to be abnormal;
the bus load rate detection unit is used for observing the bus load rate condition so as to judge the attack abnormality of the less type which occurs at each stage of the load rate, and is convenient for later analysis and correction.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. The new energy automobile control working method is characterized in that the aim of attack is achieved through the fault of the delay of the manufacturing bus signal of the load rate improvement, and the working method comprises the following steps:
step A: collecting all periodic messages of the whole vehicle local area network through a signal receiving and transmitting unit;
and (B) step (B): corresponding each message period with the message ID through a signal period analysis unit;
step C: detecting the load rate a of the bus unauthorised forwarding bus through a bus load detection unit;
step D: through the signal receiving and transmitting unit, a message with the period of 10ms and the undefined ID of the whole vehicle function is transmitted, so that the bus load reaches a+10%, a+10% is less than 70%, the state lasts for 1 minute, whether the whole vehicle function is abnormal or not is observed, if the whole vehicle function is abnormal, the step E is skipped, and if the whole vehicle function is not abnormal, the step D is skipped;
step E: stopping the signal receiving and transmitting unit to transmit the message, starting the signal receiving and transmitting unit to transmit the message, increasing the load rate by 1%, recording the load rate and fault at the moment until the abnormality is observed, and performing the next fault attack after a=a+10% of attack succeeds, and jumping to the step D to perform the next fault attack.
2. The method according to claim 1, wherein the step D and the step E execute the following operations while executing the test method:
observing the current state of the tested equipment, judging whether the obtained current state accords with the expected state, if so, not making any further judgment, otherwise, judging that the state of the CAN tested equipment is changed due to an aggressiveness test;
and (3) observing and analyzing the period delay condition of each message and the attack degree of each controller due to the increase of the load.
3. The new energy automobile control work test box comprises a diagnosis box body and is characterized in that a PCB diagnosis circuit board fixed mounting seat for fixedly mounting a PCB diagnosis circuit board is arranged in the diagnosis box body, the PCB diagnosis circuit board is fixedly mounted on the PCB diagnosis circuit board fixed mounting seat, and a microcontroller U1, a USB data transmission module, a CAN data transmission module and an RS232 data transmission module are arranged on the PCB diagnosis circuit board;
the front face of the diagnosis box body is provided with a touch display screen fixing and mounting seat for fixedly mounting a touch display screen, and the touch display screen is fixedly mounted on the touch display screen fixing and mounting seat; the diagnosis box comprises a diagnosis box body, wherein a USB interface mounting seat for fixedly mounting a USB interface JP4 is arranged on the left side surface of the diagnosis box body, the USB interface JP4 is fixedly mounted on the USB interface mounting seat, CAN interface mounting seats for fixedly mounting a CAN interface JP1 and a CAN interface JP2 are arranged on the right side surface of the diagnosis box body, the CAN interface JP1 and the CAN interface JP2 are fixedly mounted on the CAN interface mounting seats, an RS232 interface mounting seat for fixedly mounting an RS232 interface JP6 is arranged on the front side surface of the diagnosis box body, and the RS232 interface JP6 is fixedly mounted on the RS232 interface mounting seat;
the USB data transmission end of the microcontroller U1 is connected with the data transmission end of the USB data transmission module, the CAN data transmission end of the microcontroller U1 is connected with the data transmission end of the CAN data transmission module, and the RS232 data transmission end of the microcontroller U1 is connected with the data transmission end of the RS232 data transmission module; the touch display end of the microcontroller U1 is connected with the touch display end of the touch display screen.
4. The new energy automobile control working system is characterized by comprising a vehicle to be diagnosed, an upper computer and a new energy automobile control working test box;
the new energy automobile control work test box is connected with the vehicle to be diagnosed through a CAN bus, and is connected with the upper computer through a USB;
the system also comprises a signal receiving and transmitting unit, a signal period analysis unit and a bus load rate detection unit;
the signal receiving and transmitting unit is used for transmitting a message with higher priority, so that the bus load rate is gradually increased to reach the attack condition;
the signal period analysis unit is used for analyzing whether the message period has a large delay or not and exceeds the maximum tolerable range of the ECU so as to cause the function of the whole vehicle to be abnormal;
the bus load rate detection unit is used for observing the bus load rate condition so as to judge the attack abnormality of the less type which occurs at each stage of the load rate, and is convenient for later analysis and correction.
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