CN211151975U - Vehicle-mounted Ethernet testing device - Google Patents
Vehicle-mounted Ethernet testing device Download PDFInfo
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- CN211151975U CN211151975U CN201922354485.5U CN201922354485U CN211151975U CN 211151975 U CN211151975 U CN 211151975U CN 201922354485 U CN201922354485 U CN 201922354485U CN 211151975 U CN211151975 U CN 211151975U
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Abstract
The utility model discloses a vehicle-mounted Ethernet testing device, including the industry ethernet port, industry ethernet physical layer conversion chip, the switch chip, vehicle-mounted ethernet physical layer conversion chip power supply, vehicle-mounted ethernet physical layer conversion chip switch, MCU, fault injection circuit, the coupler, the noise signal source, L ED drive circuit, multichannel L ED and controller start time detection circuit.
Description
Technical Field
The utility model relates to a vehicle-mounted ethernet technical field, more specifically the theory relates to a vehicle-mounted ethernet testing arrangement.
Background
With the development of the automobile industry, the automobile electrical system becomes increasingly complex, the requirement on the automobile bus technology is higher and higher in order to meet the communication requirements of an infotainment system, an auxiliary driving system and an automobile network, and the automobile bus develops towards the direction of high bandwidth, so that the vehicle-mounted Ethernet technology is gradually increased.
At present, only a few relatively leading-edge vehicle factories have test requirements on vehicle-mounted Ethernet, and most of the vehicle factories, especially middle and low-end vehicle factories, are in an almost blank stage. Therefore, the testing technology for the vehicle-mounted ethernet is in the stage of just starting, and a mature testing scheme is not available yet.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses a vehicle-mounted Ethernet testing arrangement to the realization fills the blank of current vehicle-mounted Ethernet test technique to the test of vehicle-mounted Ethernet control.
A vehicle-mounted Ethernet test device comprises an industrial Ethernet port, an industrial Ethernet physical layer conversion chip, a switch chip, a vehicle-mounted Ethernet physical layer conversion chip power supply, a vehicle-mounted Ethernet physical layer conversion chip power switch, a micro control unit MCU, a fault injection circuit, a coupler, a noise signal source, an L ED drive circuit, a multi-channel L ED and a controller starting time detection circuit;
the industrial Ethernet port is respectively connected with the industrial Ethernet physical layer conversion chip and the upper computer, and is used for receiving a test instruction sent by the upper computer and sending the test instruction to the industrial Ethernet physical layer conversion chip;
the industrial Ethernet physical layer conversion chip, the vehicle-mounted Ethernet physical layer conversion chip and the MCU realize data exchange through the switch chip;
the power supply of the vehicle-mounted Ethernet physical layer conversion chip is connected with the vehicle-mounted Ethernet physical layer conversion chip through a power switch of the vehicle-mounted Ethernet physical layer conversion chip, and the MCU is connected with the power switch of the vehicle-mounted Ethernet physical layer conversion chip;
the fault injection circuit is respectively connected with the vehicle-mounted Ethernet physical layer conversion chip, the coupler and the MCU, and the coupler is connected with a tested vehicle-mounted Ethernet controller;
the noise signal source is connected with the coupler and used for simulating a noise working condition of the tested vehicle-mounted Ethernet controller during actual working and injecting noise into the vehicle-mounted Ethernet;
the MCU is connected with the multi-channel L ED through the L ED driving circuit and is used for driving the multi-channel L ED through the L ED driving circuit;
the multiple paths L ED are used for indicating the connection state of the vehicle-mounted Ethernet, the power supply anode electrifying state of the tested vehicle-mounted Ethernet controller, the starting power supply electrifying state of the tested vehicle-mounted Ethernet controller and the power supply working indication;
the controller starting time detection circuit is connected with the tested vehicle-mounted Ethernet controller and used for supplying power to the tested vehicle-mounted Ethernet controller, providing a wake-up signal and detecting the wake-up time of the tested vehicle-mounted Ethernet controller.
Optionally, the fault injection circuit includes: the system comprises a near-end fault injection circuit, a far-end fault injection circuit, an open-circuit fault injection circuit and a cable insertion analog circuit;
the near-end fault injection circuit is connected with the common ends of the vehicle-mounted Ethernet physical layer conversion chip and the open-circuit fault injection circuit, and is used for simulating the working conditions that a vehicle-mounted Ethernet line close to one side of the vehicle-mounted Ethernet physical layer conversion chip is short-circuited to the anode of the vehicle storage battery, the cathode of the vehicle storage battery is short-circuited and the differential line of the vehicle-mounted Ethernet is short-circuited mutually;
the cable insertion analog circuit is respectively connected with the near-end fault injection circuit and the far-end fault injection circuit and is used for simulating vehicle-mounted Ethernet cables with different lengths and different wire rods;
the far-end fault injection circuit is connected with the open-circuit fault injection circuit and the common end of the coupler and is used for simulating the working conditions that an Ethernet line close to one side of the coupler is short-circuited with the anode of the automobile storage battery, the cathode of the automobile storage battery and a vehicle-mounted Ethernet differential line;
the open-circuit fault injection circuit is connected with the tested vehicle-mounted Ethernet controller through the coupler and used for simulating the working condition of disconnection of a vehicle-mounted Ethernet cable.
Optionally, the controller start time detection circuit includes: the device comprises an anti-reverse-connection circuit, an overvoltage protection circuit, a power supply positive electrode switch circuit of a tested vehicle-mounted Ethernet controller, a starting power supply current limiting switch circuit of the tested vehicle-mounted Ethernet controller, a current detection circuit, a power supply positive electrode output port of the tested vehicle-mounted Ethernet controller, a current threshold control circuit, a current establishing time detection circuit, an overcurrent detection circuit, a power supply positive electrode voltage acquisition circuit of the tested vehicle-mounted Ethernet controller, a starting power supply output port of the tested vehicle-mounted Ethernet controller and a starting power supply voltage acquisition circuit of the tested vehicle-mounted Ethernet controller;
the reverse connection preventing circuit is connected with an external power supply and used for preventing the post-stage circuit and the tested vehicle-mounted Ethernet controller from being burnt out due to the polarity of a reverse connection power supply;
the overvoltage protection circuit is respectively connected with the reverse connection preventing circuit, the power supply positive electrode switch circuit of the tested vehicle-mounted Ethernet controller and the starting power supply current limiting switch circuit of the tested vehicle-mounted Ethernet controller, and is used for preventing the input voltage from being overhigh and damaging the rear-stage circuit and the tested vehicle-mounted Ethernet controller;
the MCU is respectively connected with a power supply positive pole switch circuit of the tested vehicle-mounted Ethernet controller and a starting power supply current limiting switch circuit of the tested vehicle-mounted Ethernet controller;
the current detection circuit is respectively connected with the power supply positive electrode switch circuit of the tested vehicle-mounted Ethernet controller and the power supply positive electrode output port of the tested vehicle-mounted Ethernet controller, and is used for measuring the current value flowing through the power supply positive electrode output port of the tested vehicle-mounted Ethernet controller;
the current threshold control circuit is respectively connected with the current establishing time detection circuit and the MCU;
the current establishment time detection circuit is respectively connected with the current detection circuit and the MCU;
the overcurrent detection circuit is respectively connected with the current detection circuit and the MCU;
the power supply positive output port of the tested vehicle-mounted Ethernet controller is connected with the tested vehicle-mounted Ethernet controller, and the power supply positive output port of the tested vehicle-mounted Ethernet controller is used for supplying power to the tested vehicle-mounted Ethernet controller;
the positive voltage acquisition circuit of the power supply of the tested vehicle-mounted Ethernet controller is respectively connected with the positive output port of the power supply of the tested vehicle-mounted Ethernet controller and the MCU, and is used for acquiring the voltage value output by the positive output port of the power supply of the tested vehicle-mounted Ethernet controller and outputting the acquired voltage value to the MCU;
the tested vehicle-mounted Ethernet controller starting power supply current-limiting switch circuit is connected with the tested vehicle-mounted Ethernet controller through a tested vehicle-mounted Ethernet controller starting power supply output port, and the tested vehicle-mounted Ethernet controller starting power supply current-limiting switch circuit is used for providing a tested vehicle-mounted Ethernet controller starting power supply wake-up signal for the tested vehicle-mounted Ethernet controller;
the tested vehicle-mounted Ethernet controller starting power supply voltage acquisition circuit is respectively connected with the tested vehicle-mounted Ethernet controller starting power supply output port and the tested vehicle-mounted Ethernet controller, and the tested vehicle-mounted Ethernet controller starting power supply voltage acquisition circuit is used for acquiring a voltage value output by the tested vehicle-mounted Ethernet controller starting power supply output port and outputting the acquired voltage value to the MCU.
Optionally, the MCU is any one of a single chip microcomputer, a field programmable gate array and a complex programmable logic device.
It can be seen from the above technical solution that the utility model discloses a vehicle-mounted Ethernet testing arrangement, the device can realize the test to vehicle-mounted Ethernet controller, the device includes industry ethernet port, industry ethernet physical layer conversion chip, the switch chip, vehicle-mounted ethernet physical layer conversion chip power supply, vehicle-mounted ethernet physical layer conversion chip switch, MCU, fault injection circuit, the coupler, the noise signal source, L ED drive circuit, multichannel L ED and controller start time detection circuit, the equipment is whole to confirm the test content to the vehicle-mounted Ethernet controller of being tested through the test instruction that industry ethernet port received host computer sent, power is provided for vehicle-mounted ethernet through vehicle-mounted ethernet physical layer conversion chip power supply, power is provided for vehicle-mounted ethernet through controller start time detection circuit, for the vehicle-mounted Ethernet controller of being tested, provide the awaken signal and detect the awaken time of vehicle-mounted Ethernet controller of being tested, through fault injection circuit simulation open circuit trouble, short circuit fault and simulation are inserted different length and different lengths of vehicle-mounted Ethernet bus, the noise simulation line has the various practical test signal sources and the present utility model has been filled because of this simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the disclosed drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a vehicle-mounted ethernet testing apparatus disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fault injection circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a controller start time detection circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses on-vehicle ethernet testing arrangement, the device can realize the test to on-vehicle ethernet controller, the device includes industry ethernet port, industry ethernet physical layer conversion chip, the switch chip, on-vehicle ethernet physical layer conversion chip power supply, on-vehicle ethernet physical layer conversion chip switch, MCU, fault injection circuit, the coupler, the noise signal source, L ED drive circuit, multichannel L ED and controller start time detection circuit, the equipment is whole to confirm the test content to being surveyed on-vehicle ethernet controller through the test instruction that industry ethernet port received host computer and sent, provide the power for on-vehicle ethernet through on-vehicle ethernet physical layer conversion chip power supply, for being surveyed on-vehicle ethernet controller power supply through controller start time detection circuit, provide the awakening signal and detect the awakening time of being surveyed on-vehicle ethernet controller, open circuit fault through fault injection circuit simulation, short-circuit fault and simulation insert the on-vehicle ethernet bus different lengths and the on-vehicle ethernet line of different wires, the noise simulation has the current state of the protection simultaneously and has the various practical test conditions because of this utility model.
Referring to fig. 1, an embodiment of the present invention discloses a structural schematic diagram of a vehicle-mounted ethernet testing apparatus, which includes an industrial ethernet port 11, an industrial ethernet physical layer conversion chip 12, a switch chip 13, a vehicle-mounted ethernet physical layer conversion chip 14, a vehicle-mounted ethernet physical layer conversion chip power supply 15, a vehicle-mounted ethernet physical layer conversion chip power switch 16, an MCU (Microcontroller Unit) 17, a fault injection circuit 18, a coupler 19, a noise signal source 20, an L ED (L light Emitting Diode) driving circuit 21, a plurality of channels L ED22, and a controller start time detection circuit 23.
Wherein:
the industrial ethernet port 11 is connected to the industrial ethernet physical layer conversion chip 12 and the upper computer, respectively, and is configured to receive a test instruction sent by the upper computer, and send the test instruction to the industrial ethernet physical layer conversion chip 12.
The test instruction includes the content of the test performed by the vehicle-mounted ethernet testing apparatus on the vehicle-mounted ethernet controller 10 to be tested.
In practical applications, the industrial ethernet port 11 is connected to the upper computer through an industrial ethernet cable.
The industrial ethernet physical layer conversion chip 12, the vehicle-mounted ethernet physical layer conversion chip 14 and the MCU17 realize data exchange through the switch chip 13.
The vehicle-mounted Ethernet physical layer conversion chip power supply 15 is connected with the vehicle-mounted Ethernet physical layer conversion chip 14 through a vehicle-mounted Ethernet physical layer conversion chip power switch 16, and the MCU17 is connected with the vehicle-mounted Ethernet physical layer conversion chip power switch 16 and used for controlling the connection and disconnection of a power supply circuit between the vehicle-mounted Ethernet physical layer conversion chip power supply 15 and the vehicle-mounted Ethernet physical layer conversion chip 14 by controlling the connection and disconnection of the vehicle-mounted Ethernet physical layer conversion chip power switch 16.
The fault injection circuit 18 is respectively connected with the vehicle-mounted Ethernet physical layer conversion chip 14, the coupler 19 and the MCU17, the coupler 19 is connected with the tested vehicle-mounted Ethernet controller 10, and the fault injection circuit 18 is used for simulating open-circuit faults, short-circuit faults and simulating cables with different lengths inserted into a vehicle-mounted Ethernet bus.
The noise signal source 20 is connected to the coupler 19, and the noise signal source 20 is used for simulating a noise working condition of the tested vehicle-mounted ethernet controller 10 during actual operation and injecting noise into the vehicle-mounted ethernet.
Note that the noise signal source 20 is an external device that independently supplies a noise signal.
The MCU17 is connected to the multiple L ED22 through L ED driver circuit 21, and the MCU17 is used to drive the multiple L ED22 through driving L ED driver circuit 21.
The multiple paths L ED22 are used for indicating the connection state of the vehicle-mounted Ethernet, the power supply anode power-on state of the tested vehicle-mounted Ethernet controller, the starting power supply power-on state of the tested vehicle-mounted Ethernet controller and the power supply working indication.
It should be noted that the positive electrode of the power supply of the tested vehicle-mounted ethernet controller, that is, K L30, and the start power supply of the tested vehicle-mounted ethernet controller, that is, K L15.
The controller start time detection circuit 23 is connected to the tested vehicle-mounted ethernet controller 10, and the controller start time detection circuit 23 is configured to supply power to the tested vehicle-mounted ethernet controller 10, provide a wake-up signal, and detect a wake-up time of the tested vehicle-mounted ethernet controller 10.
In practical applications, the controller activation time detection circuit 23 detects the wake-up time of the tested vehicle-mounted ethernet controller 10 by detecting the current of K L30 and the current of K L15.
In summary, the embodiment of the present invention discloses a vehicle-mounted ethernet testing device, which can realize the testing of a vehicle-mounted ethernet controller, the device includes an industrial ethernet port 11, an industrial ethernet physical layer conversion chip 12, a switch chip 13, a vehicle-mounted ethernet physical layer conversion chip 14, a vehicle-mounted ethernet physical layer conversion chip power supply 15, a vehicle-mounted ethernet physical layer conversion chip power switch 16, a MCU17, a fault injection circuit 18, a coupler 19, a noise signal source 20, a L ED driving circuit 21, a plurality of paths L ED22 and a controller activation time detection circuit 23. the device receives a test command from a host computer through the industrial ethernet port 11 to determine the test content of the vehicle-mounted ethernet controller, the power supply 15 supplies power to the vehicle-mounted ethernet through the vehicle-mounted ethernet physical layer conversion chip, the controller activation time detection circuit 23 supplies an activation signal to the vehicle-mounted ethernet controller, and detects the activation time of the vehicle-mounted ethernet controller, simulates open circuit fault, short circuit fault, and insertion of wires into the vehicle-mounted ethernet controller, and the vehicle-mounted ethernet controller has various working conditions.
Optionally, referring to fig. 2, in a circuit diagram of a fault injection circuit disclosed in an embodiment of the present invention, the fault injection circuit 18 may include: a proximal fault injection circuit 181, a distal fault injection circuit 182, an open fault injection circuit 183, and a cable insertion analog circuit 184.
The near-end fault injection circuit 181 is connected to the common end of the vehicle-mounted ethernet physical layer conversion chip 14 and the open-circuit fault injection circuit 183, and the near-end fault injection circuit 181 is configured to simulate a working condition that a vehicle-mounted ethernet line near one side of the vehicle-mounted ethernet physical layer conversion chip 14 short-circuits the positive electrode of the vehicle storage battery, the negative electrode of the vehicle storage battery, and a vehicle-mounted ethernet differential line mutually.
Note that the positive electrode of the vehicle battery is short-circuited, that is, VBAT is short-circuited, the negative electrode of the vehicle battery is short-circuited, that is, K L31 is short-circuited, and K L31 denotes the negative electrode of the battery.
Cable insertion analog circuit 184 is connected with near-end trouble injection circuit 181 and distal end trouble injection circuit 182 respectively, and cable insertion analog circuit 184 is used for simulating the on-vehicle ethernet line of different length and different wire rods, and wherein, predetermines line length and according to actual need and decide, the utility model discloses do not limit here.
The far-end fault injection circuit 182 is connected with the open-circuit fault injection circuit 183 and the common end of the coupler 19, and the far-end fault injection circuit 182 is used for simulating the working conditions that the Ethernet line close to one side of the coupler 19 is short-circuited with the positive electrode of the automobile storage battery, the negative electrode of the automobile storage battery and the vehicle-mounted Ethernet differential line.
The open-circuit fault injection circuit 183 is connected with the tested vehicle-mounted Ethernet controller 10 through the coupler 19, and the open-circuit fault injection circuit 183 is used for simulating the working condition that the vehicle-mounted Ethernet line is disconnected.
For further optimizing above-mentioned embodiment, the utility model also discloses an internal circuit structure of controller start-up time detection circuitry 23.
Referring to fig. 3, an embodiment of the present invention discloses a circuit diagram of a controller start time detection circuit, which includes: the system comprises a reverse connection preventing circuit 31, an overvoltage protection circuit 32, a power supply positive pole switch circuit 33 of the tested vehicle-mounted Ethernet controller, a starting power supply current limiting switch circuit 34 of the tested vehicle-mounted Ethernet controller, a current detection circuit 35, a power supply positive pole output port 36 of the tested vehicle-mounted Ethernet controller, a current threshold control circuit 37, a current establishment time detection circuit 38, an overcurrent detection circuit 39, a power supply positive pole voltage acquisition circuit 40 of the tested vehicle-mounted Ethernet controller, a starting power supply output port 41 of the tested vehicle-mounted Ethernet controller and a starting power supply voltage acquisition circuit 42 of the tested vehicle-mounted Ethernet controller.
It should be noted that, in this embodiment, the positive power supply terminal of the tested vehicle-mounted ethernet controller, that is, K L30, and the start power supply terminal of the tested vehicle-mounted ethernet controller, that is, K L15, therefore, the positive switch circuit 33 of the power supply terminal of the tested vehicle-mounted ethernet controller is a K L30 switch circuit, the current-limiting switch circuit 34 of the start power supply terminal of the tested vehicle-mounted ethernet controller is a K L15 current-limiting switch circuit, the positive output port 36 of the power supply terminal of the tested vehicle-mounted ethernet controller is an output port of K L30, the positive voltage collecting circuit 40 of the power supply terminal of the tested vehicle-mounted ethernet controller is a voltage collecting circuit of K L30, the output port 41 of the start power supply terminal of the tested vehicle-mounted ethernet controller is an output port of K L15, and the voltage collecting circuit 42 of the start power supply terminal of the tested vehicle-mounted ethernet controller is a voltage collecting circuit of K L15.
The reverse connection preventing circuit 31 is connected with an external power supply, and the reverse connection preventing circuit 31 is used for preventing the rear-stage circuit and the tested vehicle-mounted Ethernet controller 10 from being burnt out due to the reverse connection of the polarity of the power supply.
The overvoltage protection circuit 32 is respectively connected with the reverse connection preventing circuit 31, the power supply positive electrode switch circuit 33 of the tested vehicle-mounted Ethernet controller and the starting power supply current limiting switch circuit 34 of the tested vehicle-mounted Ethernet controller, and the overvoltage protection circuit 32 is used for preventing the input voltage from being too high and damaging the rear-stage circuit and the tested vehicle-mounted Ethernet controller 10.
The MCU17 is respectively connected with the power supply positive switch circuit 33 of the tested vehicle-mounted Ethernet controller and the starting power current limiting switch circuit 34 of the tested vehicle-mounted Ethernet controller, and the MCU17 is used for controlling the power supply electrification of the power supply positive switch circuit 33 of the tested vehicle-mounted Ethernet controller and the starting power current limiting switch circuit 34 of the tested vehicle-mounted Ethernet controller.
The current detection circuit 35 is respectively connected with the power supply positive electrode switch circuit 33 of the tested vehicle-mounted Ethernet controller and the power supply positive electrode output port 36 of the tested vehicle-mounted Ethernet controller, and the current detection circuit 35 is used for measuring the current value flowing through the power supply positive electrode output port 36 of the tested vehicle-mounted Ethernet controller.
The current threshold control circuit 37 is connected to the current establishment time detection circuit 38 and the MCU17, respectively, and the current threshold control circuit 37 is configured to provide a current threshold corresponding to the current threshold instruction to the current establishment time detection circuit 38 according to the current threshold instruction sent by the MCU 17.
The magnitude of the current threshold is determined by the MCU17, and the MCU17 can adjust the magnitude of the current threshold to meet the requirements of different tested vehicle-mounted ethernet controllers 10 according to the difference between the sleep current and the wake-up current of the tested vehicle-mounted ethernet controller 10.
The current establishment time detection circuit 38 is respectively connected to the current detection circuit 35 and the MCU17, the current establishment time detection circuit 38 is configured to detect whether an output current of the positive output port 36 of the power supply of the vehicle-mounted ethernet controller under test reaches a first current threshold, if so, output a high level signal to the MCU17, and the MCU17 controls the positive switch circuit 33 of the power supply of the vehicle-mounted ethernet controller under test to turn off after detecting the high level signal, thereby implementing overcurrent protection.
The over-current detection circuit 39 is respectively connected with the current detection circuit 35 and the MCU17, and the over-current detection circuit 39 is configured to detect whether the output current of the power supply positive output port 36 of the tested vehicle-mounted ethernet controller exceeds a second current threshold, and if so, output an over-current signal to the MCU 17.
Wherein the second current threshold is greater than the first current threshold.
The power supply positive output port 36 of the tested vehicle-mounted Ethernet controller is connected with the tested vehicle-mounted Ethernet controller 10, and the power supply positive output port 36 of the tested vehicle-mounted Ethernet controller is used for supplying power to the tested vehicle-mounted Ethernet controller 10.
The positive voltage acquisition circuit 40 of the power supply of the tested vehicle-mounted Ethernet controller is respectively connected with the positive output port 36 of the power supply of the tested vehicle-mounted Ethernet controller and the MCU17, and the positive voltage acquisition circuit 40 of the power supply of the tested vehicle-mounted Ethernet controller is used for acquiring the voltage value output by the positive output port 36 of the power supply of the tested vehicle-mounted Ethernet controller and outputting the acquired voltage value to the MCU 17.
The tested vehicle-mounted Ethernet controller starting power current-limiting switch circuit 34 is connected with the tested vehicle-mounted Ethernet controller 10 through a tested vehicle-mounted Ethernet controller starting power output port 41, and the tested vehicle-mounted Ethernet controller starting power current-limiting switch circuit 34 is used for providing a tested vehicle-mounted Ethernet controller starting power wake-up signal for the tested vehicle-mounted Ethernet controller 10 and limiting current when the current of the tested vehicle-mounted Ethernet controller exceeds a third current threshold value so as to protect the tested vehicle-mounted Ethernet controller from being damaged.
The tested vehicle-mounted Ethernet controller starting power supply voltage acquisition circuit 42 is respectively connected with the tested vehicle-mounted Ethernet controller starting power supply output port 41 and the tested vehicle-mounted Ethernet controller 10, and the tested vehicle-mounted Ethernet controller starting power supply voltage acquisition circuit 42 is used for acquiring a voltage value output by the tested vehicle-mounted Ethernet controller starting power supply output port 41 and outputting the acquired voltage value to the MCU 17.
It should be noted that each MUC17 in fig. 3 is the same MCU as the MCU17 in fig. 2.
Optionally, the MCU17 may be a single chip microcomputer, an FPGA (Field Programmable Gate Array), a CP L D (Complex Programmable L analog Device), or the like.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A vehicle-mounted Ethernet testing device is characterized by comprising an industrial Ethernet port, an industrial Ethernet physical layer conversion chip, a switch chip, a vehicle-mounted Ethernet physical layer conversion chip power supply, a vehicle-mounted Ethernet physical layer conversion chip power switch, a micro control unit MCU, a fault injection circuit, a coupler, a noise signal source, an L ED driving circuit, a multi-channel L ED and a controller starting time detection circuit;
the industrial Ethernet port is respectively connected with the industrial Ethernet physical layer conversion chip and the upper computer, and is used for receiving a test instruction sent by the upper computer and sending the test instruction to the industrial Ethernet physical layer conversion chip;
the industrial Ethernet physical layer conversion chip, the vehicle-mounted Ethernet physical layer conversion chip and the MCU realize data exchange through the switch chip;
the power supply of the vehicle-mounted Ethernet physical layer conversion chip is connected with the vehicle-mounted Ethernet physical layer conversion chip through a power switch of the vehicle-mounted Ethernet physical layer conversion chip, and the MCU is connected with the power switch of the vehicle-mounted Ethernet physical layer conversion chip;
the fault injection circuit is respectively connected with the vehicle-mounted Ethernet physical layer conversion chip, the coupler and the MCU, and the coupler is connected with a tested vehicle-mounted Ethernet controller;
the noise signal source is connected with the coupler and used for simulating a noise working condition of the tested vehicle-mounted Ethernet controller during actual working and injecting noise into the vehicle-mounted Ethernet;
the MCU is connected with the multi-channel L ED through the L ED driving circuit and is used for driving the multi-channel L ED through the L ED driving circuit;
the multiple paths L ED are used for indicating the connection state of the vehicle-mounted Ethernet, the power supply anode electrifying state of the tested vehicle-mounted Ethernet controller, the starting power supply electrifying state of the tested vehicle-mounted Ethernet controller and the power supply working indication;
the controller starting time detection circuit is connected with the tested vehicle-mounted Ethernet controller and used for supplying power to the tested vehicle-mounted Ethernet controller, providing a wake-up signal and detecting the wake-up time of the tested vehicle-mounted Ethernet controller.
2. The on-board ethernet testing apparatus of claim 1, wherein said fault injection circuit comprises: the system comprises a near-end fault injection circuit, a far-end fault injection circuit, an open-circuit fault injection circuit and a cable insertion analog circuit;
the near-end fault injection circuit is connected with the common ends of the vehicle-mounted Ethernet physical layer conversion chip and the open-circuit fault injection circuit, and is used for simulating the working conditions that a vehicle-mounted Ethernet line close to one side of the vehicle-mounted Ethernet physical layer conversion chip is short-circuited to the anode of the vehicle storage battery, the cathode of the vehicle storage battery is short-circuited and the differential line of the vehicle-mounted Ethernet is short-circuited mutually;
the cable insertion analog circuit is respectively connected with the near-end fault injection circuit and the far-end fault injection circuit and is used for simulating vehicle-mounted Ethernet cables with different lengths and different wire rods;
the far-end fault injection circuit is connected with the open-circuit fault injection circuit and the common end of the coupler and is used for simulating the working conditions that an Ethernet line close to one side of the coupler is short-circuited with the anode of the automobile storage battery, the cathode of the automobile storage battery and a vehicle-mounted Ethernet differential line;
the open-circuit fault injection circuit is connected with the tested vehicle-mounted Ethernet controller through the coupler and used for simulating the working condition of disconnection of a vehicle-mounted Ethernet cable.
3. The on-board ethernet testing apparatus of claim 1, wherein said controller activation time detection circuit comprises: the device comprises an anti-reverse-connection circuit, an overvoltage protection circuit, a power supply positive electrode switch circuit of a tested vehicle-mounted Ethernet controller, a starting power supply current limiting switch circuit of the tested vehicle-mounted Ethernet controller, a current detection circuit, a power supply positive electrode output port of the tested vehicle-mounted Ethernet controller, a current threshold control circuit, a current establishing time detection circuit, an overcurrent detection circuit, a power supply positive electrode voltage acquisition circuit of the tested vehicle-mounted Ethernet controller, a starting power supply output port of the tested vehicle-mounted Ethernet controller and a starting power supply voltage acquisition circuit of the tested vehicle-mounted Ethernet controller;
the reverse connection preventing circuit is connected with an external power supply and used for preventing the post-stage circuit and the tested vehicle-mounted Ethernet controller from being burnt out due to the polarity of a reverse connection power supply;
the overvoltage protection circuit is respectively connected with the reverse connection preventing circuit, the power supply positive electrode switch circuit of the tested vehicle-mounted Ethernet controller and the starting power supply current limiting switch circuit of the tested vehicle-mounted Ethernet controller, and is used for preventing the input voltage from being overhigh and damaging the rear-stage circuit and the tested vehicle-mounted Ethernet controller;
the MCU is respectively connected with a power supply positive pole switch circuit of the tested vehicle-mounted Ethernet controller and a starting power supply current limiting switch circuit of the tested vehicle-mounted Ethernet controller;
the current detection circuit is respectively connected with the power supply positive electrode switch circuit of the tested vehicle-mounted Ethernet controller and the power supply positive electrode output port of the tested vehicle-mounted Ethernet controller, and is used for measuring the current value flowing through the power supply positive electrode output port of the tested vehicle-mounted Ethernet controller;
the current threshold control circuit is respectively connected with the current establishing time detection circuit and the MCU;
the current establishment time detection circuit is respectively connected with the current detection circuit and the MCU;
the overcurrent detection circuit is respectively connected with the current detection circuit and the MCU;
the power supply positive output port of the tested vehicle-mounted Ethernet controller is connected with the tested vehicle-mounted Ethernet controller, and the power supply positive output port of the tested vehicle-mounted Ethernet controller is used for supplying power to the tested vehicle-mounted Ethernet controller;
the positive voltage acquisition circuit of the power supply of the tested vehicle-mounted Ethernet controller is respectively connected with the positive output port of the power supply of the tested vehicle-mounted Ethernet controller and the MCU, and is used for acquiring the voltage value output by the positive output port of the power supply of the tested vehicle-mounted Ethernet controller and outputting the acquired voltage value to the MCU;
the tested vehicle-mounted Ethernet controller starting power supply current-limiting switch circuit is connected with the tested vehicle-mounted Ethernet controller through a tested vehicle-mounted Ethernet controller starting power supply output port, and the tested vehicle-mounted Ethernet controller starting power supply current-limiting switch circuit is used for providing a tested vehicle-mounted Ethernet controller starting power supply wake-up signal for the tested vehicle-mounted Ethernet controller;
the tested vehicle-mounted Ethernet controller starting power supply voltage acquisition circuit is respectively connected with the tested vehicle-mounted Ethernet controller starting power supply output port and the tested vehicle-mounted Ethernet controller, and the tested vehicle-mounted Ethernet controller starting power supply voltage acquisition circuit is used for acquiring a voltage value output by the tested vehicle-mounted Ethernet controller starting power supply output port and outputting the acquired voltage value to the MCU.
4. The vehicle-mounted Ethernet test device of claim 1, wherein the MCU is any one of a single chip microcomputer, a field programmable gate array and a complex programmable logic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354485.5U CN211151975U (en) | 2019-12-24 | 2019-12-24 | Vehicle-mounted Ethernet testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354485.5U CN211151975U (en) | 2019-12-24 | 2019-12-24 | Vehicle-mounted Ethernet testing device |
Publications (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112291108A (en) * | 2020-09-09 | 2021-01-29 | 国网浙江慈溪市供电有限公司 | Method for detecting network port connection state in Ethernet switch |
| CN113395189A (en) * | 2021-06-30 | 2021-09-14 | 重庆长安汽车股份有限公司 | Vehicle-mounted Ethernet SQI signal quality testing method and system |
| CN114172540A (en) * | 2022-02-14 | 2022-03-11 | 北京国科天迅科技有限公司 | Port detection circuit and method |
| CN115134280A (en) * | 2022-06-23 | 2022-09-30 | 安徽江淮汽车集团股份有限公司 | Fault testing system and method for vehicle-mounted Ethernet |
| CN116192711A (en) * | 2022-12-30 | 2023-05-30 | 东风柳州汽车有限公司 | Ethernet physical layer testing device, method and storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112291108A (en) * | 2020-09-09 | 2021-01-29 | 国网浙江慈溪市供电有限公司 | Method for detecting network port connection state in Ethernet switch |
| CN112291108B (en) * | 2020-09-09 | 2022-06-24 | 国网浙江慈溪市供电有限公司 | Method for detecting network port connection state in Ethernet switch |
| CN113395189A (en) * | 2021-06-30 | 2021-09-14 | 重庆长安汽车股份有限公司 | Vehicle-mounted Ethernet SQI signal quality testing method and system |
| CN114172540A (en) * | 2022-02-14 | 2022-03-11 | 北京国科天迅科技有限公司 | Port detection circuit and method |
| CN114172540B (en) * | 2022-02-14 | 2022-05-17 | 北京国科天迅科技有限公司 | Port detection circuit and method |
| CN115134280A (en) * | 2022-06-23 | 2022-09-30 | 安徽江淮汽车集团股份有限公司 | Fault testing system and method for vehicle-mounted Ethernet |
| CN115134280B (en) * | 2022-06-23 | 2023-11-24 | 安徽江淮汽车集团股份有限公司 | Fault testing system and method for vehicle-mounted Ethernet |
| CN116192711A (en) * | 2022-12-30 | 2023-05-30 | 东风柳州汽车有限公司 | Ethernet physical layer testing device, method and storage medium |
| CN116192711B (en) * | 2022-12-30 | 2024-03-26 | 东风柳州汽车有限公司 | Ethernet physical layer testing device, method and storage medium |
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