CN109774625A - Vehicle electronics, the method for determining internal resistance and the vehicle with the vehicle electronics - Google Patents
Vehicle electronics, the method for determining internal resistance and the vehicle with the vehicle electronics Download PDFInfo
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- CN109774625A CN109774625A CN201810477668.3A CN201810477668A CN109774625A CN 109774625 A CN109774625 A CN 109774625A CN 201810477668 A CN201810477668 A CN 201810477668A CN 109774625 A CN109774625 A CN 109774625A
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- electronic device
- vehicle
- internal resistance
- message
- sum
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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
- H04L12/40169—Flexible bus arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
-
- 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
- H04L12/4013—Management of data rate on the bus
-
- 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
-
- 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 present invention relates to vehicle electronics, determine the method for internal resistance and the vehicle with the vehicle electronics.A kind of method for determining the internal resistance of the electronic device of vehicle includes: within first time, to pass through vehicle network in vehicle launch engine ignition or after bringing into operation and receive the message from another electronic device；The sum of the electronic device of vehicle network is connected to based on the message authentication；Internal resistance is determined according to the Current Temperatures of the sum of electronic device and each electronic device.
Description
With cross reference to related applications
This application claims the equity for the South Korea patent application No.10-2017-0150597 that on November 13rd, 2017 submits, should
The full content of application is incorporated herein by reference.
Technical field
The present invention relates to a kind of vehicle electronics, determine the method for internal resistance and the vehicle with the vehicle electronics
, it is more particularly related to a kind of vehicle electronics for improving signal robustness, determine the method and tool of internal resistance
There is the vehicle of the vehicle electronics.
Background technique
In recent years, as the quantity for the electronic device for being installed on vehicle increases sharply, the High-speed Control of vehicle-carrying communication network
The bus load (that is, communication load) of device local area network (CAN) has been more than emergency, and with high speed between multiple electronic devices
The demand for carrying out more multidata high-speed communication also increases sharply.
To solve the above-mentioned problems, be recently proposed it is a kind of for improve communication speed based on leaving (legacy) CAN
The controller LAN of communication-elastic data rate (Controller Area Network-Flexible Data rate,
CAN-FD) the solution communicated.
Although routine techniques has attempted to ask by communicating some vehicle application FlexRay to solve above-mentioned bus load
Topic, but efficiency is lower in terms of routine techniques workinprocess cost.
On the contrary, CAN-FD communication is to improve data signaling rate and transmission (Tx) data based on current CAN communication network
The method of amount, so that CAN-FD communication has been discussed and has been able to solve bus load as using superior cost efficiency and asks
The alternative solution of topic.
However, the speed of CAN-FD communication plan is at least four times of CAN communication speed (500kbps), signal wave is reduced
Shape distortion (ring) be it is essential, it is various reduce signal waveforms distortion (ring) methods by many developers and public affairs
Department's further investigation.
Specifically, CAN-FD communication is affected by signal wave distortion (ring), this is the size according to internal resistance
Rather than the capacitor of internal capacitor, guarantee the robust of signal waveform therefore, it is necessary to a kind of method of selection internal resistance appropriate
Property.
Summary of the invention
Therefore, this invention address that eliminate limitation and the disadvantage as the relevant technologies significantly and caused by it is one or more
The vehicle electronics of a problem, the method for determining internal resistance and the vehicle with the vehicle electronics.
The object of the present invention is to provide a kind of vehicle electronics, determines the method for internal resistance and there is vehicle electric dress
The vehicle set, transmission/reception (Tx/Rx) signal that the vehicle electronics are used to guarantee to be communicated by in-vehicle network
Waveform robustness.
Other advantages, purpose and feature of the invention, a part will be explained in the following description, and a part of
By after examining following specification, those skilled in the art will be apparent, or can be from the practice of the present invention
Study.The objectives and other advantages of the invention can refer in particular in written explanation and claim and attached drawing through the invention
Structure out is achieved and obtained.
In order to realize these targets and other advantages, and implements and briefly describe of the invention according to herein
Purpose, a kind of method for determining the internal resistance of the electronic device of vehicle include: in vehicle launch engine ignition or to start to transport
After row, within first time, the message from another electronic device is received by vehicle network；Company is confirmed according to the message
It is connected to the sum of the electronic device of vehicle network；It is determined according to the Current Temperatures of the sum of electronic device and each electronic device
Internal resistance.
According to another aspect of the present invention, a kind of electronic device for vehicle includes: transceiver, is configured in vehicle
Starting engine ignition or after bringing into operation, within first time, is received by vehicle network from another electronic device
Message；Internal resistance unit, with multiple internal resistances；And central processing unit (CPU), it is configured to be confirmed according to the message
Be connected to the sum of the electronic device of vehicle network, according to electronic device sum and each electronic device Current Temperatures come from
Internal resistance is determined in multiple internal resistances.
It should be understood that above-mentioned general description and it is described in detail below be all exemplary with it is explanatory, it is intended to mention
It of the invention is explained further for required.
Detailed description of the invention
Including attached drawing to provide a further understanding of the present invention, and it is incorporated herein to constitute part of this application；
Attached drawing shows embodiment of the present invention, and combines specification principle for explaining the present invention.In the accompanying drawings:
Fig. 1 is showing the concept map of vehicle network system according to embodiments of the present invention.
Fig. 2A is showing the concept map of the communication mistake as caused by the internal resistance of controller.
Fig. 2 B is showing the concept map of the communication mistake encountered according to the temperature of controller.
Fig. 3 is showing the block diagram of controller according to embodiments of the present invention.
Fig. 4 is showing according to embodiments of the present invention for determining the side of the internal resistance of vehicle electronics (controller)
The first pass figure of method.
Fig. 5 is showing according to embodiments of the present invention for determining the side of the internal resistance of vehicle electronics (controller)
The second flow chart of method.
Fig. 6 is showing according to embodiments of the present invention for determining the side of the internal resistance of vehicle electronics (controller)
The third flow chart of method.
Specific embodiment
Hereinafter, device and method according to embodiments of the present invention be will be described with reference to the accompanying drawings.In the following description,
The suffix " module " and " unit " for including in the term of constituent element will be only in the convenience in view of writing following specification
Property when just selected or be used together, and suffix " module " and " unit " not necessarily have different meaning or effect.
Fig. 1 is showing the concept map of vehicle network system 10 according to embodiments of the present invention.
Referring to Fig.1, vehicle network system 10 is for realizing the in-vehicle network system communicated between multiple interior electronic devices
System, may include the single bus 10 being made of two conducting wires and multiple controllers (20,30-1~30- for being connected to bus 10
9).In this case, the quantity of controller and the classification of controller can change according to the classification or specification of vehicle.Term
" controller " can refer to vehicle electronics.
Terminal resistance 13 and 14 can be connected respectively to the both ends of bus 10.Terminal resistance 13 and 14 can be in high speed signal
The energy for receiving (Rx) mode carrier wave is absorbed in transmission process, it is ensured that the stability of signal, and can be holding voltage electricity
It is flat that load appropriate is provided.For example, terminal resistance 13 or 14 may be embodied as the resistance of 120 Ω, but the range of terminal resistance or
Spirit is not limited thereto.
Multiple controllers (20,30-1~30-9) can refer to multiple CAN-FD communication control based on CAN-FD communication protocol
Device, and sending and receiving for data can be carried out by bus 10 by being connected to bus 10.
Engine management system as at least one controller 20 in multiple controllers (20,30-1~30-9)
It (EMS) may include terminal resistance 13.Each controller including terminal resistance 13 can predefine (example in ES specification
Such as, EMS, CAN gateway (CGW), cluster etc.).
In addition, although multiple controllers (30-1~30-9) can correspond respectively to transmission control unit (TCU), four-wheel
Drive (4WD) controller, electronic stability control (ESC), cluster, steering angle sensor (SAS), intelligent cruise control (SCC),
Air bag control unit (ACU), electric parking brake (EPB) and adaptive headlamp illuminating system (AFLS), but it is of the invention
Range or spirit are not limited thereto.
Each of controller (30-1~30-9) can include the internal resistance of installation to inside CAN-FD telecommunication circuit.
In CAN-FD communication period, the wave distortion of the Tx/Rx signal communicated by bus 10 may by internal resistance size without
It is the capacitor large effect of internal capacitor.Therefore, controller (30-1~30- of an embodiment according to the present invention
Each of 9) internal resistance can be dynamically controlled, to guarantee the robustness of signal waveform.
Vehicle network system 10 may further include for diagnosing the data transmission fault encountered in CAN-FD network
Connector 40 is diagnosed, and diagnoses connector 40 also and may be coupled to bus 10.
Diagnosis connector 40 can be a kind of communication controler of the mistake of diagnosis CAN-FD communication network, and can lead to
Cross the sending and receiving to diagnose the mistake of CAN-FD communication network of message.
According to another embodiment, CAN communication scheme is can be used at least one of controller (30-1~30-9).
Fig. 2A is showing the concept map of the communication mistake as caused by controller internal resistance.
In fig. 2, left hand view can be shown when the internal resistance of controller is 1k Ω, pass through bus transmission/received signal
Signal distortion, and right part of flg can show when the internal resistance of controller be 5.6k Ω when, pass through bus transmission/received signal
Signal distortion.
When the voltage level translation of signal is 0.9V or higher, it is assumed that signal voltage level is identified as zero by controller
"0".When the voltage level translation of signal is 0.5V or lower, it is assumed that signal voltage level is identified as " 1 " by controller.This
Outside, it is assumed that the reference time needed for 1 transmission is set as 500ns.
As shown in the left hand view of Fig. 2A, when the signal that the controller of transmitting terminal is sent corresponds to the data changed from 0 to 1
When, after the reference time by 500ns, the controller that internal resistance is 1k Ω can identify that signal changes from 0 to 1, and
Distorted signals/delay is not will cause.
But as shown in Fig. 2A right part of flg, when the signal that the controller of transmitting terminal is sent corresponds to the number changed from 0 to 1
According to when, by 500ns reference time after, internal resistance be 5.6k Ω controller may not identify signal from 0 to 1
Variation, and after the longer time by 1016ns, it can just identify that signal changes from 0 to 1, it is tight so as to occur
Distorted signals/delay of weight.
In more detail, the internal resistance of controller is higher, signal stabilization time (signal stabilization time,
Referred to as signal settling time (signal settling time)) it is longer, so as to cause serious distorted signals/prolong occurs
Late.
Therefore, it is necessary to a kind of detection internal resistances appropriate to prevent the method for stop signal distortion/delay generation.
Fig. 2 B is showing the concept map of the communication mistake encountered according to the temperature of controller.
In more detail, Fig. 2 B is shown when the temperature of controller is respectively set to -40 DEG C, 23 DEG C and 140 DEG C, is passed through
Bus transmission/received signal stablizes the time.The temperature of controller can be the temperature (or mean temperature) of each controller, can
To be the temperature of specific controller, or it can be the temperature of the specific position of bus.
Referring to Fig. 2 B, when the temperature of controller gradually rises according to -40 DEG C → 23 DEG C → 140 DEG C of sequence, signal is steady
Fix time (signal settling time) be gradually reduced.When the temperature of controller is gradually dropped according to 140 DEG C → 23 DEG C → -40 DEG C of sequence
When low, signal stabilization time is gradually increased.
Since the internal resistance of controller changes according to temperature, so signal stabilization time can be with temperature change, so that meeting
Distorted signals/delay occurs.
Therefore, distorted signals/delay generation in order to prevent, need it is a kind of consider controller temperature it is appropriate selection in
The method of resistance.
Fig. 3 is showing the block diagram of controller according to embodiments of the present invention.
Referring to Fig. 3, vehicle network system 30 can be the simple version of vehicle network system 10 shown in FIG. 1, and can be with
Detailed circuit including specific controller 100.
CAN-FD bus 300, CAN high line 301 line 302 low with CAN can illustrate terminal resistance with different modes
(13,14) and bus 10.First signal (for example, high RST), which can be sent to, is connected to CAN-FD bus 300 and CAN high line
301 conducting wire, second signal (for example, low signal), which can be sent to, is connected to leading for the line 302 low with CAN of CAN-FD bus 300
Line.
Each controller may be coupled to two conducting wires, and such controller can utilize the first signal and the second signal
Differential signal executes data transmission/reception.First controller 100 and second controller are into the 4th controller (310~330)
Each can be any one in multiple controllers (30-1~30-9).Although as shown in figure 3, four controllers connect
It is connected to CAN-FD network, but the scope or spirit of the invention is not limited thereto, the quantity for the controller that can be connected can be lacked
In 4,4 can also be equal to or higher than.
Although following embodiments of the invention will surround 100 disclosure of the first controller, following embodiments should be noted that
Also it can according to need applied to other controllers (310~330).
First controller 100 may include central processing unit (CPU) 110, CAN-FD transceiver 120 and internal resistance unit
130.Certainly, the first controller 100 can also include the more or less constituent element than above-mentioned constituent element, without
Deviate the scope or spirit of the invention.
CPU 110 can control the overall operation of the first controller 100, and can be by CAN-FD network by Tx data
(TXD) it is sent to CAN-FD transceiver 120, to be communicated with another controller, or is come from by the reception of CAN-FD network
The Rx data (RXD) of CAN-FD transceiver 120.In addition, Tx data (TXD) and Rx data (RXD) can be numerical data.
In addition, internal resistance selection signal (SW0~SWn, wherein " n " is 1 or larger integer) can be generated in CPU 110, with
For controlling the switch for including in internal resistance unit 130, and it can use internal resistance selection signal (SW0~SWn) from internal resistance unit
The internal resistance of CAN-FD transceiver 120 is alternatively coupled in the multiple internal resistances for including in 130.
CAN-FD transceiver 120 may be coupled to the line 302 low with CAN of CAN high line 301, and can execute and be used as simulation
The first signal and the second signal of signal send and receive.In more detail, CAN-FD transceiver 120 can receive from it
The first signal and the second signal of his controller, and can be by executing differential amplification and ADC (Analog-digital Converter) next life
At Rx data (RXD).Alternatively, CAN-FD transceiver 120 can receive Tx data (TXD), and received Tx number can be passed through
The first signal and the second signal as differential signal are generated according to the DAC (digital-to-analogue conversion) of (TXD), so that CAN-FD is received
Hair device 120 can send the first signal and the second signal to different controllers.
Internal resistance unit 130 may include multiple internal resistances, these internal resistances include be connected respectively to CAN-FD transceiver 120
One internal resistance is to N internal resistance (R0~Rn).When necessary, according to being connected respectively to switch of first internal resistance to N internal resistance (R0~Rn)
The operational circumstances of (TR0~TRn) can choose or can not select the first internal resistance to N internal resistance (R0~Rn) as internal resistance.
Although being embodied as MOSFET to each switch (TR0~TRn) property of can be exemplified, the scope or spirit of the invention is simultaneously
It is without being limited thereto.Internal resistance selection signal (SW0~SWn) can be the gate-control signal of each switch (TR0~TRn) or each open
Closing (TR0~TRn) can turn on and off according to the voltage level of internal resistance selection signal (SW0~SWn).
For example, (for example, high level) and internal resistance selection signal when internal resistance selection signal (SW0) is in the first level
When (SW1~SWn) is in second electrical level (for example, low level), only switch (TR1) can be connected, and in addition to switch (TR1)
Other switches (TR1~TRn) can turn off.In such a case, it is possible to select internal resistance as resistance R0.
The resistance value of each resistance can be gradually increased according to R0 → R1 → R2 ... → Rn sequence.For example, although can be with
There are 6 internal resistances, and R0, R1, R2, R3, R4 and R5 can be respectively set to 0.5k Ω, 1k Ω, 2k Ω, 3k Ω, 4k Ω and
5k Ω, but the scope or spirit of the invention is not limited thereto, internal resistance unit 130 may include more internal resistances, and not
Same resistance value can distribute to each internal resistance in the mode different from above-mentioned example.
Internal resistance with the first controller 100 determines that related detailed operation will be described below in reference to Fig. 4.
First controller 100 may further include temperature sensor 140.Temperature sensor 140 may be mounted at first
The inner surface of controller 100 or outer surface can produce the temperature information of the first controller 100, and can be by the temperature of generation
Information is output to CPU 110.
Although the example of Fig. 3 has exemplarily disclosed temperature sensor 140 included in the first controller 100, this
The range or spirit of invention are not limited thereto, and the first controller 100 can not include temperature sensor, and can be from including temperature
The neighbor controller for spending sensor receives temperature information.
Fig. 4 shows the method according to embodiments of the present invention for determining the internal resistance of vehicle electronics (controller)
First pass figure.
Referring to Fig. 4, when vehicle is opened engine ignition (or starting) or is started running, after the completion of engine ignition or
In first time after vehicle driving, the whole hairs for being connected to CAN-FD network are can be confirmed in the CPU110 of the first controller 100
Send (Tx) message.In this case, after vehicle is opened engine ignition or started running, it can specify that and be connected to vehicle net
Each controller of network sends initial message (that is, it is only to be used to indicate each controller to network within the scheduled time (500ms)
From the message of normal operating).In this case, the time longer than the predetermined time (for example, 3 seconds) be can be at the first time.Example
Such as, it can be in view of the bad abnormal conditions of such as battery condition and determine at the first time.
The entire message sent from other controllers can be confirmed in first controller 100, then can be confirmed and is connected to
The quantity (S20) of all controllers of CAN-FD network.From each controller send message may include can identify it is each
The identifier (ID) of controller.The CPU 110 of first controller 100 can be based on institute in the message received within first time
The ID for including is connected to the quantity of current CAN-FD network-based control device to confirm.For example, the first controller shown in Fig. 3
100 can be confirmed out that the quantity for being connected to all controllers of CAN-FD network (hereinafter referred to as network) is 4.
When CPU 110 determines that the quantity for being connected to network-based control device is located in range A, can execute shown in Fig. 4
Step S30 to S64.For example, range A can indicate the quantity for being connected to network-based control device in the range of 1 to 9.
CPU 110 can determine whether the quantity for being connected to network-based control device is located in range A and Current Temperatures are
It is no to be located in the first range (S30).If Current Temperatures are located in the first range (in S30 be), CPU 110 can be determined
Internal resistance is R5, and can determine whether that erroneous frame (S32) occurs by monitoring receipt of subsequent message.For example, the first range can
To be 50 DEG C or higher temperature range.
In addition, although for the ease of description, CPU 110, which can be confirmed and identify, receives crc field included in message,
But the scope or spirit of the invention is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S32), then CPU 110 can control internal resistance and remain R5 (S34).
If Current Temperatures exceed the first range (no in S30), CPU 110 can determine whether Current Temperatures are located at
In second range (S40).If Current Temperatures are located in the second range (in S40 be), CPU 110 can determine that internal resistance is
R4, and erroneous frame can be determined with the presence or absence of (S42) by monitoring receipt of subsequent message.For example, the second range can be 0~
50 DEG C of temperature range.
Although erroneous frame can be confirmed and identify the crc field for receiving and including in message, the scope or spirit of the invention
It is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S42), then CPU 110 can control internal resistance and remain R4 (S44).
If Current Temperatures exceed the second range (no in S40), CPU 110 can determine whether Current Temperatures are located at
Within the scope of third (S50).If Current Temperatures are located within the scope of third (in S50 be), CPU 110 can determine that internal resistance is
R3, and erroneous frame can be determined with the presence or absence of (S52) by monitoring receipt of subsequent message.For example, third range can be 0 DEG C
Or lower temperature range.
Although erroneous frame can be confirmed and identify the crc field for receiving and including in message, the scope or spirit of the invention
It is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S52), then CPU 110 can control internal resistance and remain R3 (S54).
Determined when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute) erroneous frame exist (
It is no in S32, S42 or S52), then CPU 110 can determine that internal resistance is R4, R3 or R2, and can monitor erroneous frame and whether there is
(S42, S52 or S62).
CPU 110 can determine each internal resistance be R4, R3 or R2, and can monitor erroneous frame with the presence or absence of (S42, S52 or
S62)。
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S62), then CPU 110 can control internal resistance and remain R2 (S64).
Fig. 5 shows the method according to embodiments of the present invention for determining the internal resistance of vehicle electronics (controller)
Second flow chart.
The step of reference Fig. 5, step S10 and S20 can be with Fig. 4, is identical.
When CPU 110 determines that the quantity for being connected to network-based control device is located in range B, institute in Fig. 5 can be executed
The step S130 to S164 shown.For example, range B can indicate range of the quantity for being connected to network-based control device 10 to 14
It is interior.
CPU 110 can determine whether the quantity for being connected to network-based control device is located in range B and Current Temperatures are
It is no to be located in the first range (S130).If Current Temperatures are located in the first range (in S130 be), CPU 110 can be true
Determining internal resistance is R4, and can determine whether that erroneous frame (S132) occurs by monitoring receipt of subsequent message.For example, the first range
It can be 50 DEG C or higher temperature range.
In addition, although for the ease of description, CPU 110, which can be confirmed and identify, receives crc field included in message,
But the scope or spirit of the invention is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S132), then CPU 110 can control internal resistance and remain R4 (S134).
If Current Temperatures exceed the first range (no in S130), CPU 110 can determine Current Temperatures whether position
In (S140) in the second range.If Current Temperatures are located in the second range (in S140 be), in CPU 110 can be determined
Resistance is R3, and can determine erroneous frame with the presence or absence of (S142) by monitoring receipt of subsequent message.For example, the second range can be with
It is 0~50 DEG C of temperature range.
In addition, although for the ease of description, CPU 110, which can be confirmed and identify, receives crc field included in message,
But the scope or spirit of the invention is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S142), then CPU 110 can control internal resistance and remain R3 (S144).
If Current Temperatures exceed the second range (no in S140), CPU 110 can determine Current Temperatures whether position
In (S150) within the scope of third.If Current Temperatures are located within the scope of third (in S150 be), in CPU 110 can be determined
Resistance is R2, and can determine erroneous frame with the presence or absence of (S152) by monitoring receipt of subsequent message.For example, the second range can be with
It is 0 DEG C or lower temperature range.
Although erroneous frame can be confirmed and identify the crc field for receiving and including in message, the scope or spirit of the invention
It is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S152), then CPU 110 can control internal resistance and remain R2 (S154).
Determine that erroneous frame exists when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(in S132, S142 or S152 be), then CPU 110 can determine that internal resistance is R3, R2 or R1, and whether can monitor erroneous frame
In the presence of (S142, S152 or S162).
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S162), CPU 110 can control internal resistance and remain R1 (S164).
Fig. 6 shows the method according to embodiments of the present invention for determining the internal resistance of vehicle electronics (controller)
Third flow chart.
The step of reference Fig. 6, step S10 and S20 can be with Fig. 4 or Fig. 5, is identical.
When CPU 110 determines that the quantity for being connected to network-based control device is located in range C, institute in Fig. 6 can be executed
The step S230 to S264 shown.For example, range C can indicate that the quantity for being connected to network-based control device is 15 or higher.
CPU 110 can determine whether the quantity for being connected to network-based control device is located in range C and Current Temperatures are
It is no to be located in the first range (S230).If Current Temperatures are located in the first range (in S230 be), CPU 110 can be determined
Internal resistance is R3, and can determine whether that erroneous frame (S232) occurs by monitoring receipt of subsequent message.For example, the first range can
To be 50 DEG C or higher temperature range.
In addition, although for the ease of description, CPU 110, which can be confirmed and identify, receives crc field included in message,
But the scope or spirit of the invention is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S232), then CPU 110 can control internal resistance and remain R3 (S234).
If whether CPU 110 can determine Current Temperatures when Current Temperatures exceed the first range (no in S230)
In the second range (S240).If Current Temperatures are located in the second range (in S240 be), CPU 110 can be determined
Internal resistance is R2, and can determine erroneous frame with the presence or absence of (S242) by monitoring receipt of subsequent message.For example, the second range can
To be 0~50 DEG C of temperature range.
In addition, although for the ease of description, CPU 110, which can be confirmed and identify, receives crc field included in message,
But the scope or spirit of the invention is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S242), then CPU 110 can control internal resistance and remain R2 (S244).
If whether CPU 110 can determine Current Temperatures when Current Temperatures exceed the second range (no in S240)
Within the scope of third (S250).If Current Temperatures are located within the scope of third (in S250 be), CPU 110 can be determined
Internal resistance is R1, and can determine erroneous frame with the presence or absence of (S252) by monitoring receipt of subsequent message.For example, third range can
To be 0 DEG C or lower temperature range.
Although erroneous frame can be confirmed and identify the crc field for receiving and including in message, the scope or spirit of the invention
It is not limited thereto.
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S252), CPU 110 can control internal resistance and remain R1 (S254).
Determine that erroneous frame exists when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(in S232, S242 or S252 be), CPU 110 can determine that internal resistance is R2, R1 or R0, and can monitor whether erroneous frame deposits
At (S242, S252 or S262).
Determine that erroneous frame is not present when if monitoring erroneous frame whether there is during the predetermined time (for example, 1 minute)
(no in S262), then CPU 110 can control internal resistance and remain R0 (S264).
That is, the Current Temperatures for being connected to network-based control device sum and each controller can be confirmed in CPU 110,
Internal resistance can be selected according to controller sum and Current Temperatures, data transmission/reception can be carried out by selected internal resistance, and can
It is whether appropriate to verify selected internal resistance whether there is by monitoring erroneous frame.If selected internal resistance is inappropriate, CPU is selected
110 can choose another internal resistance, and thus may be selected that makes the smallest best internal resistance of distorted signals/delay.
Unlike Fig. 4, when in the first controller 100 including more internal resistances, the flow chart of Fig. 4 can also extend
For the mode that can choose another resistance.
Range A to C and the first range to third range can be changed according to the classification or specification of vehicle.When the first control
When device 100 includes more internal resistances, range A to C and the first range to third range can be classified as more more detailed models
It encloses.
Range A to C, the first range to the pass between third range and the resistance value of internal resistance can be determined by experiment
System, to keep distorted signals/delay minimum.
Vehicle network system according to embodiments of the present invention can be by changing the quantity installed to network-based control device
And Current Temperatures, the optimal internal resistance optimized to be selected as stabilization signal waveform, so as to so that distorted signals and delay are minimum.
When carrying out data communication according to selected internal resistance, vehicle network can be whether there is by monitoring erroneous frame to adjust
Whole internal resistance, so as to so that distorted signals and delay are minimum.
As can be seen that vehicle network system according to embodiments of the present invention can be according to installation to net from foregoing description
One internal resistance is changed to another by the quantity and Current Temperatures of the controller of network, and can choose as stabilization signal waveform and excellent
The best internal resistance changed, so as to so that signal waveform distortion (ring) and delay time minimum.
In addition, embodiment of the present invention can be by whether there is mistake in data communication of the monitoring based on selected internal resistance
Frame adjusts internal resistance, so as to so that signal waveform distortion and delay time it is minimum.
Can be fabricated to according to the method for embodiment can be executed by computer and be can store computer-readable
Recording medium in program.The example of computer-readable recording medium may include: read-only memory (ROM), random
Access memory (RAM), compact disc read-only memory (CD-ROM), tape, floppy disk and optical data storage device.It is computer-readable
The recording medium taken can be by network distribution to computer system interconnected, so that computer-readable code is to divide
The mode of cloth is stored or is executed.
Those skilled in the art will become apparent from, and various modifications and change can be made to the present invention, without departing from the present invention
Spirit or scope.Therefore, above-mentioned specific embodiment must be regarded as being merely to illustrate property purpose rather than restricted purpose.
The scope of the present invention must be determined by the reasonable analysis to claim, and all modifications in equivalents of the present invention
It is within.
Claims (17)
1. a kind of method for determining the internal resistance of the electronic device of vehicle comprising:
In vehicle launch engine ignition or after bringing into operation, within first time, is received by vehicle network and come from another electricity
The message of sub-device；
The sum for being connected to the electronic device of vehicle network is confirmed based on the message；
Internal resistance is determined according to the Current Temperatures of the sum of electronic device and each electronic device.
2. the method according to claim 1 for determining the internal resistance of the electronic device of vehicle, wherein the first time
Specific time than becheduleding for sending initial message after the completion of vehicle start operation is long.
3. the method according to claim 1 for determining the internal resistance of the electronic device of vehicle, wherein be based on the message
To confirm that the sum for the electronic device for being connected to vehicle network includes:
The quantity of electronic device is confirmed by identifying the identifier of message.
4. the method according to claim 1 for determining the internal resistance of the electronic device of vehicle, wherein vehicle network is control
Device local area network-elastic data speed internet processed.
5. the method according to claim 1 for determining the internal resistance of the electronic device of vehicle, wherein according to electronic device
Sum include: to determine internal resistance
Determine which of multiple ranges are related with the sum of electronic device；
Internal resistance is determined according to respective range.
6. the method according to claim 1 for determining the internal resistance of the electronic device of vehicle, wherein with electronic device
Sum gradually increase, determining internal resistance gradually reduces.
7. the method according to claim 1 for determining the internal resistance of the electronic device of vehicle, further comprising:
After determining internal resistance, the message received is monitored, and is determined whether that erroneous frame occurs according to monitoring result.
8. the method according to claim 7 for determining the internal resistance of the electronic device of vehicle, further comprising:
When erroneous frame occurs, determine that internal resistance is lower internal resistance；
When erroneous frame there is no when, keep internal resistance.
9. a kind of electronic device for vehicle comprising:
Transceiver is configured within first time, pass through vehicle network in vehicle launch engine ignition or after bringing into operation
Receive the message from another electronic device；
Internal resistance unit, with multiple internal resistances；And
Central processing unit is configured to the message to confirm the sum for the electronic device for being connected to vehicle network, root
To determine internal resistance from multiple internal resistances according to the sum of electronic device and the Current Temperatures of each electronic device.
10. the electronic device according to claim 9 for vehicle, wherein the first time ratio is becheduled in vehicle
The specific time that initial message is sent after the completion of start-up function is long.
11. the electronic device according to claim 9 for vehicle, wherein central processing unit passes through identification message
Identifier confirms the quantity of the electronic device for being connected to vehicle network.
12. the electronic device according to claim 9 for vehicle, wherein vehicle network is controller LAN-elasticity
Data rate networks.
13. the electronic device according to claim 9 for vehicle, in which:
The central processing unit determines which of multiple ranges are related with the sum of electronic device, and according to corresponding model
It encloses to determine internal resistance.
14. the electronic device according to claim 9 for vehicle, wherein as the sum of electronic device gradually increases,
Determining internal resistance gradually reduces.
15. the electronic device according to claim 9 for vehicle, in which:
After determining internal resistance, the central processing unit is monitored the message received, and is determined according to monitoring result
Whether erroneous frame is occurred.
16. the electronic device according to claim 15 for vehicle, in which:
When erroneous frame occurs, the central processing unit determines that internal resistance is lower internal resistance；
When erroneous frame there is no when, the central processing unit keeps internal resistance.
17. a kind of vehicle comprising:
Multiple electronic devices for vehicle；
Controller LAN-elastic data speed internet is configured to the multiple electronic devices that will be in communication with each other and carries out phase
It connects,
Wherein, each of electronic device all includes:
Transceiver is configured within first time, pass through vehicle network in vehicle launch engine ignition or after bringing into operation
Receive the message from another electronic device；
Internal resistance unit, with multiple internal resistances；
Central processing unit is configured to the message to confirm the sum for the electronic device for being connected to vehicle network, root
To determine internal resistance from multiple internal resistances according to the sum of electronic device and the Current Temperatures of each electronic device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170150597A KR102467224B1 (en) | 2017-11-13 | 2017-11-13 | Electronic Device for Vehicle, Method of Determining Internal Resistance, and Vehicle including the same |
| KR10-2017-0150597 | 2017-11-13 |
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| Publication Number | Publication Date |
|---|---|
| CN109774625A true CN109774625A (en) | 2019-05-21 |
| CN109774625B CN109774625B (en) | 2023-08-25 |
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| CN201810477668.3A Active CN109774625B (en) | 2017-11-13 | 2018-05-18 | Method for determining internal resistance, vehicle electronic device and vehicle with same |
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| KR (1) | KR102467224B1 (en) |
| CN (1) | CN109774625B (en) |
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| CN114706440A (en) * | 2022-03-31 | 2022-07-05 | 重庆长安新能源汽车科技有限公司 | Adjustable ringing suppression circuit and vehicle |
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Also Published As
| Publication number | Publication date |
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| KR102467224B1 (en) | 2022-11-14 |
| CN109774625B (en) | 2023-08-25 |
| KR20190054394A (en) | 2019-05-22 |
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