CN217640021U - Detection equipment for converting vehicle-mounted Ethernet signal into CAN signal - Google Patents
Detection equipment for converting vehicle-mounted Ethernet signal into CAN signal Download PDFInfo
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Abstract
The utility model provides a check out test set that is used for on-vehicle ethernet signal to change CAN signal includes at least: the system comprises a TSN gateway, a CAN signal detector and an upper computer, wherein the CAN signal detector is provided with a CAN signal acquisition interface; the CAN signal detector is connected with the upper computer, the TSN gateway converts the vehicle-mounted Ethernet signal into a CAN signal and outputs the CAN signal to the CAN bus, and the CAN signal detector is connected with the CAN bus through the CAN signal acquisition interface so as to acquire the CAN signal and transmit the CAN signal to the upper computer. The utility model provides a technical scheme is gathered through the signal that turns into the data package of CAN agreement to on-vehicle ethernet data packet, carries out the analysis back with signal transmission to the host computer, and real-time supervision on-vehicle ethernet ECU's data package is at the transmission quality of CAN bus.
Description
Technical Field
The utility model relates to a vehicle-mounted communication signal detection area especially relates to a check out test set that is used for on-vehicle ethernet signal to change CAN signal.
Background
With the development of science and technology, the intelligent development of automobile technology is promoted. At present, automobiles develop towards intellectualization, entertainment and automation, and the development of the automobiles needs high bandwidth and low time delay of the automobiles, particularly the automatic driving and advanced auxiliary driving functions of the automobiles. Therefore, the traditional CAN bus is difficult to meet the requirements of high bandwidth and low delay, and the transmission standard protocol of the vehicle-mounted Ethernet bus has high bandwidth and low delay so that the CAN bus CAN be replaced, thereby meeting the functions of automatic driving and advanced auxiliary driving of an automobile. However, the CAN bus has high reliability and is widely used for transmitting control signals, so that the CAN bus is difficult to be completely replaced by a vehicle-mounted Ethernet bus, and the CAN bus and the vehicle-mounted Ethernet bus are still fused for use in future intelligent automobiles. However, in the process of converting the data packet of the vehicle-mounted ethernet protocol into the CAN data packet transmitted by the CAN bus, high reliable CAN quality needs to be obtained. Factors affecting the reliability of the CAN bus signal are as follows: power supply ripple/noise, distributed capacitance, signal reflection, electromagnetic interference, etc., which cause the instability of the CAN signal, because the on-board ethernet signal is required to be converted into the CAN signal for online detection.
SUMMERY OF THE UTILITY MODEL
Based on the defect that prior art exists, the utility model provides a check out test set that is used for on-vehicle ethernet signal to change CAN signal includes at least: the system comprises a TSN gateway, a CAN signal detector and an upper computer, wherein the CAN signal detector is provided with a CAN signal acquisition interface;
CAN signal detector is connected with the host computer, and on the output was to the CAN bus after the TSN gateway turned into the CAN signal with on-vehicle Ethernet signal, CAN signal detector passed through the CAN signal and acquireed interface access CAN bus to transmission to the host computer behind the collection CAN signal.
The utility model provides a check out test set that is used for on-vehicle ethernet signal to CAN signal, further preferably, the TSN gateway is equipped with on-vehicle ethernet interface, CAN interface, protocol conversion chip, wherein, on-vehicle ethernet interface includes: 100base1-T1, 10base-T1 and 1000 base-T1;
after a data packet of the vehicle-mounted Ethernet interface is accessed into the TSN gateway through the vehicle-mounted Ethernet interface, the data packet of the vehicle-mounted Ethernet is converted into a data packet which accords with a CAN protocol through a protocol conversion chip.
A detection device for converting an on-vehicle ethernet signal into a CAN signal, further preferably, the CAN signal detector comprises: the high-speed ADC chip is respectively connected with the high-bandwidth AMP chip and the FPGA SoC chip;
the high-bandwidth AMP chip is used for amplifying the preposed CAN signal;
the height ADC chip is used for acquiring signals processed by the high-bandwidth AMP chip;
and the FPGA SoC chip is used for issuing a control signal according to the requirement of the upper computer to acquire and store the output data of the high-speed ADC chip and packing the output data according to the instruction of the upper computer.
A detection device for converting an on-vehicle ethernet signal into a CAN signal, further preferably, the FPGA SoC chip comprises:
the FPGA core module is used for sending a control instruction or buffering CAN signal data or transmitting the CAN signal data to an upper computer;
the DMA controller is used for acquiring CAN data of the data collector through an AXIS bus and sending the CAN data to the cache region of the FPGA for storage through the AXI bus;
and the data collector is used for receiving the signal acquisition instruction of the FPGA module and acquiring CAN signal data from the LVDS data interface according to the acquisition instruction.
A detection device for converting an on-vehicle ethernet signal into a CAN signal, further preferably, the FPGA core module at least includes: the system comprises an ARM processor and a cache region, wherein the ARM processor is connected with a data collector through an AXI control bus and used for sending an instruction whether to acquire a CAN signal;
the buffer area is connected with the DMA controller through an AXI bus and used for transmitting or buffering data according to the instruction of the ARM processor.
A detection device for converting vehicle-mounted Ethernet signals into CAN signals is further preferred, wherein a CAN detector is provided with a plurality of data acquisition interfaces for synchronously acquiring ECU signals of different CAN buses.
A detection device for converting an on-vehicle Ethernet signal into a CAN signal is further preferred, and the CAN detector is connected with an upper computer in a wired or wireless communication mode.
A detection device for converting a vehicle-mounted Ethernet signal into a CAN signal is further preferred, wherein the CAN detector comprises a human-computer interaction module, and the human-computer interaction module at least comprises a display screen, a key and an indicator light;
the display screen is used for displaying a system menu and acquired signal waveforms;
the indicating lamp is used for indicating the current working state of the CAN detector;
the keys are used for receiving control instructions input by a user.
A detection device for converting an on-board Ethernet signal into a CAN signal is further preferred, wherein a CAN detector is connected with an upper computer through a USB bus or the CAN detector is connected with the upper computer through an RJ45 interface and an Ethernet bus.
A detection device for converting a vehicle-mounted Ethernet signal into a CAN signal is further preferable, the ADS61B23, the sampling rate 80MSPS and the resolution 12Bits are selected by a high-speed ADC chip, and an output interface is an LVDS interface.
Has the advantages that:
the technical scheme of the utility model CAN bus signal sample through changing into vehicle-mounted ethernet data packet, and data transmission is to the host computer after, is handled data by host computer software, CAN restore into the oscillogram, combines artifical analysis or carries out the analysis through software algorithm and aassessment to signal quality. The factors which may cause bus faults such as short circuit faults and signal integrity of the CAN bus CAN be judged through the oscillogram, and meanwhile, the data packet transmission quality condition of the vehicle-mounted Ethernet ECU is detected.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
Fig. 1 is the utility model relates to an embodiment vehicle-mounted ethernet signal changes the check out test set of CAN signal and is applied to the schematic diagram that vehicle-mounted CAN bus acquireed the signal.
Fig. 2 is the utility model relates to a detection equipment schematic structure diagram of one-way on-vehicle ethernet signal changes CAN signal.
Fig. 3 is a schematic diagram of a structure of a detection apparatus for converting a multipath vehicle-mounted ethernet signal into a CAN signal according to an embodiment of the present invention.
Fig. 4 is the utility model relates to an embodiment FPGA SoC chip's in the check out test set that on-vehicle ethernet signal changes the CAN signal structural schematic diagram.
Detailed Description
In order to more clearly understand the technical features, objects, and effects herein, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. For the sake of simplicity, the drawings schematically show the relevant parts of the present invention, and do not represent the actual structure as a product. Moreover, in the drawings, components having the same structure or function are illustrated schematically or labeled schematically for simplicity and understanding.
The connection in the present invention may include direct connection, indirect connection, communication connection, and electrical connection, except for special description.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, values, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, values, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items
The utility model provides a check out test set that is used for on-vehicle ethernet signal to change CAN signal, refer to fig. 1 to fig. 4, specifically include:
the system comprises a TSN gateway, a CAN signal detector and an upper computer, wherein the CAN signal detector is provided with a CAN signal acquisition interface;
CAN signal detector is connected with the host computer, and on the output was to the CAN bus after the TSN gateway turned into the CAN signal with on-vehicle Ethernet signal, CAN signal detector passed through the CAN signal and acquireed interface access CAN bus to transmission to the host computer behind the collection CAN signal.
Specifically, the specific test procedure is as follows:
the ECU of the vehicle-mounted Ethernet is accessed into the TSN gateway, CAN signals generated after conversion by the TSN gateway are accessed into the CAN bus, testing is carried out under the condition that all equipment is powered on, the detection equipment receives the input state of the CAN signals, signals are not output to the CAN bus, communication of other equipment is not influenced, and due to the input state, the equivalent resistance of the bus is not influenced, namely normal communication of the bus is not interfered.
The CAN detection device that this embodiment provided only acquires CAN bus signal, does not influence normal on-vehicle CAN's ECU's communication, gathers CAN bus's signal through CAN detection device, sends the CAN bus signal of gathering to the host computer and carries out CAN signal quality analysis.
The TSN gateway is equipped with on-vehicle ethernet interface, CAN interface, protocol conversion chip, and wherein, the on-vehicle ethernet interface includes: 100base1-T1, 10base-T1 and 1000 base-T1;
after the data packet of the vehicle-mounted Ethernet interface is accessed into the TSN gateway through the vehicle-mounted Ethernet interface, the data packet of the vehicle-mounted Ethernet is converted into a data packet conforming to the CAN protocol through the protocol conversion chip.
Specifically, it should be noted that the conversion of the vehicle-mounted ethernet signal into the CAN signal is a format conversion of two data packets with different standard protocols, and there are many similar prior arts describing how to perform the conversion, so the present embodiment is not described in detail.
Referring to fig. 1 specifically, the vehicle-mounted ethernet ECU accesses the TSN gateway through a vehicle-mounted ethernet PHY interface, and transmits a vehicle-mounted ethernet signal to the TSN gateway, and the TSN gateway converts a data packet of the vehicle-mounted ethernet into a CAN data packet through a protocol conversion module, and specifically, the vehicle-mounted ethernet data packet is an SOME/IP protocol data packet for transmitting a control signal;
the CAN bus is divided into a CAN _ H end and a CAN _ L end, more CAN communication nodes exist on the CAN bus, the CAN _ L end and the CAN _ H of the CAN detection device are accessed into the CAN bus at a preset CAN bus position to acquire signals according to requirements, and the signals are transmitted to an upper computer to be analyzed.
Specifically, the CAN detection device comprises: CAN signal detector, host computer based on FPGA chip realizes, and CAN signal detector passes through connection interface and inserts the CAN bus, passes through CAN signal detector and sets up communication interface and inserts the host computer after gathering signal input from the CAN bus.
This embodiment is different from prior art, and CAN detection device among the prior art all adopts relevant spare part to splice together, and its cost is higher, and is comparatively bulky. In this embodiment, the CAN signal detector of the key component is implemented by the FPGA, which is flexible, and after the hardware function is described by Verilog, the code of the hardware needs to be interpreted by using a synthesizer and converted into an actual functional chip.
Specifically, as shown in fig. 2, the CAN signal detector includes: the high-bandwidth AMP chip acquires a CAN signal and transmits the signal to the high-speed ADC chip,
and the FPGA SoC chip issues a control signal according to the requirement of the upper computer to acquire and store the output data of the high-speed ADC chip and packages the data according to the instruction of the upper computer.
The high-bandwidth AMP chip (amplifier) CAN acquire and amplify signals of the CAN bus more quickly, and the high-bandwidth AMP serves as a signal front stage and is used for processing the signals;
the CAN signal is accessed to the high-speed ADC chip through the high-bandwidth AMP chip, the ADS61B23, the sampling rate 80MSPS and the resolution ratio 12Bits are selected by the high-speed ADC chip, and the output interface is an LVDS interface.
Because there are many vehicle-mounted ethernet ECUs, sometimes it is necessary to collect control commands sent by multiple different vehicle-mounted ethernet ECUs at the same time for testing, in order to meet the requirement of this scenario, this embodiment provides a collection device for multiple paths of CAN signals, see fig. 3, and fig. 3 is a multiple paths of CAN signal detector. Specifically, 2 paths of CAN signals CAN be tested simultaneously, and two branches share an FPGA SoC chip.
The FPGA SoC chip comprises:
the FPGA core module is used for sending a control instruction or buffering CAN signal data or transmitting the CAN signal data to the upper computer;
the DMA controller is used for acquiring CAN data of the data collector through an AXIS bus and sending the CAN data to the cache region of the FPGA for storage through the AXI bus;
and the data collector is used for receiving the signal acquisition instruction of the FPGA module and acquiring CAN signal data from the LVDS data interface according to the acquisition instruction.
The edge trigger acquisition is arranged on rising edge trigger acquisition or falling edge trigger acquisition;
triggering a rising edge and a falling edge to determine the position of sampling data by detecting a CAN waveform, wherein the recorded content is a section of data before triggering and a section of data after triggering;
the length of the data before and after triggering is configured through an upper computer instruction.
The FPGA SoC chip is used as a core, and the data is buffered and sampled through the FPGA SoC chip and communicated with an upper computer.
Specifically, communicate with the host computer and can adopt USB interface, RJ45 interface, WIFI or 4G/5G radio communication.
The FPGA core module at least comprises: the system comprises an ARM processor and a cache region, wherein the ARM processor is connected with a data collector through an AXI control bus and used for sending an instruction whether to acquire a CAN signal;
the buffer area is connected with the DMA controller through an AXI bus and used for transmitting or buffering data according to the instruction of the ARM processor.
The CAN detector is connected with the upper computer in a wired or wireless communication mode.
The CAN detector is connected with an upper computer through a USB bus or the CAN detector is connected with the upper computer through an RJ45 interface and an Ethernet bus.
Specifically, the data analysis processing can be carried out by connecting a 4G/5G cloud server;
connect this host computer through wifi, bluetooth.
The CAN detector comprises a human-computer interaction module, referring to figures 2 and 3, wherein the human-computer interaction module at least comprises a display screen, a key and an indicator light;
the display screen is used for displaying a system menu and acquired signal waveforms;
the indicating lamp is used for indicating the current working state of the CAN detector;
the keys are used for receiving control instructions input by a user.
The high-speed ADC chip selects ADS61B23, the sampling rate is 80MSPS, the resolution is 12Bits, and the output interface is an LVDS interface.
What has been described above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is clear to those skilled in the art that the form in this embodiment is not limited thereto, and the adjustable manner is not limited thereto. It is understood that other modifications and variations directly derivable or suggested by a person skilled in the art without departing from the basic idea of the invention are considered to be within the scope of protection of the invention.
Claims (10)
1. A detection device for converting an on-vehicle Ethernet signal into a CAN signal is characterized by at least comprising: the system comprises a TSN gateway, a CAN signal detector and an upper computer, wherein the CAN signal detector is provided with a CAN signal acquisition interface;
the CAN signal detector is connected with the upper computer, the TSN gateway converts the vehicle-mounted Ethernet signal into a CAN signal and outputs the CAN signal to the CAN bus, and the CAN signal detector is connected with the CAN bus through the CAN signal acquisition interface so as to acquire the CAN signal and transmit the CAN signal to the upper computer.
2. The detecting device for converting the vehicle-mounted ethernet signal into the CAN signal according to claim 1, wherein the TSN gateway is provided with a vehicle-mounted ethernet interface, a CAN interface, and a protocol conversion chip, wherein the vehicle-mounted ethernet interface comprises: 100base1-T1, 10base-T1 and 1000 base-T1;
after the data packet of the vehicle-mounted Ethernet interface is accessed into the TSN gateway through the vehicle-mounted Ethernet interface, the data packet of the vehicle-mounted Ethernet is converted into a data packet conforming to the CAN protocol through the protocol conversion chip.
3. The apparatus of claim 1, wherein the CAN signal detector comprises: the high-speed ADC chip is respectively connected with the high-bandwidth AMP chip and the FPGA SoC chip;
the high-bandwidth AMP chip is used for amplifying the preposed CAN signal;
the high-speed ADC chip is used for acquiring signals processed by the high-bandwidth AMP chip;
and the FPGA SoC chip is used for issuing a control signal according to the requirement of the upper computer to acquire and store the output data of the high-speed ADC chip and packing the output data according to the instruction of the upper computer.
4. The apparatus according to claim 3, wherein the FPGA SoC chip comprises:
the FPGA core module is used for sending a control instruction or buffering CAN signal data or transmitting the CAN signal data to an upper computer;
the DMA controller is used for acquiring CAN data of the data collector through an AXIS bus and sending the CAN data to the cache area of the FPGA for storage through the AXIbus;
and the data collector is used for receiving the signal acquisition instruction of the FPGA module and acquiring CAN signal data from the LVDS data interface according to the acquisition instruction.
5. The device according to claim 4, wherein the FPGA core module at least comprises: the system comprises an ARM processor and a cache region, wherein the ARM processor is connected with a data collector through an AXI control bus and used for sending an instruction whether to acquire a CAN signal;
the buffer area is connected with the DMA controller through an AXI bus and used for transmitting or buffering data according to the instruction of the ARM processor.
6. The device as claimed in claim 1, wherein the CAN detector comprises a plurality of data acquisition interfaces for synchronously acquiring ECU signals of different CAN buses.
7. The device as claimed in claim 1, wherein the CAN detector is connected to the host computer by wired or wireless communication.
8. The device of claim 1, wherein the CAN detector comprises a human-computer interaction module, the human-computer interaction module at least comprises a display screen, a key and an indicator light;
the display screen is used for displaying a system menu and acquired signal waveforms;
the indicating lamp is used for indicating the current working state of the CAN detector;
the keys are used for receiving control instructions input by a user.
9. The device as claimed in claim 7, wherein the CAN detector is connected to the host computer through a USB bus or the CAN detector is connected to the host computer through an RJ45 interface and an ethernet bus.
10. The device as claimed in claim 3, wherein the high-speed ADC chip selects ADS61B23, the sampling rate is 80MSPS, the resolution is 12Bits, and the output interface is an LVDS interface.
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| CN202221675626.9U CN217640021U (en) | 2022-06-30 | 2022-06-30 | Detection equipment for converting vehicle-mounted Ethernet signal into CAN signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117640283A (en) * | 2023-11-23 | 2024-03-01 | 广州致远电子股份有限公司 | Vehicle-mounted Ethernet analysis system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117640283A (en) * | 2023-11-23 | 2024-03-01 | 广州致远电子股份有限公司 | Vehicle-mounted Ethernet analysis system |
| CN117640283B (en) * | 2023-11-23 | 2024-06-11 | 广州致远电子股份有限公司 | Vehicle-mounted Ethernet analysis system |
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