CN108896901A - A kind of DCU circuitry self test system and detection method - Google Patents
A kind of DCU circuitry self test system and detection method Download PDFInfo
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- CN108896901A CN108896901A CN201810436183.XA CN201810436183A CN108896901A CN 108896901 A CN108896901 A CN 108896901A CN 201810436183 A CN201810436183 A CN 201810436183A CN 108896901 A CN108896901 A CN 108896901A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
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Abstract
The invention discloses a kind of DCU circuitry self test system and detection method, wherein self-checking system includes：Detection circuit, BDM tool and the off-line test instrument being connect with the DCU（EOL）, and pass through off-line test instrument（EOL）With the host computer of the DCU communication connection；The BDM tool is connect with the host computer；The beneficial effects of the invention are as follows：Monitoring system of the invention can detect automatically circuit board input/output terminal before DCU circuit board fills shell, and whether there is or not Welding Problems, singlechip chip has fault-free, circuit board is solved because discovery DCU is carried out there are problem after detectable limit deviation caused by original part failure, and dress shell entrucking vehicle is done over again phenomenon.
Description
Technical field
The present invention relates to commercial vehicle DCU technical field of circuit board detection, in particular to the DCU circuit before a kind of dress shell is certainly
Check system and detection method.
Background technique
Since commercial vehicle electronic control technology is quickly grown, all kinds of automatically controlled DCU circuit boards enter the court fill shell before need to carry out circuit
Detection, especially input and output detect, and are worked normally with ensuring to install electronic control unit.
Now by taking SCR state V gas helps DCU circuit board as an example, since shell can be packed into after brushing BOOTLOADER, only fill
Upper vehicle brush could onboard judge circuit board input and output end with the presence or absence of problem after entering APP.And due to circuit board
Welding certainly exists disqualification rate, and underproof circuit board is very troublesome from newly restructuring after discovery, so needing a set of DCU
Equipment is restructured circuit board early period to be detected before DCU fills shell.
Summary of the invention
In order to being detected before loading onto vehicle to DCU circuit board in DCU, avoid the occurrence of find after entrucking it is unqualified
Circuit board also needs situations such as restructuring again, and the present invention provides one kind to carry out circuit board self-test and each to circuit board before filling shell
The DCU circuitry self test system and detection method that input/output terminal is detected.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of DCU circuitry self test system, the self-checking system packets
It includes：Detection circuit, BDM tool and the off-line test instrument (EOL) being connect with the DCU, and by off-line test instrument (EOL) with
The host computer of the DCU communication connection；The BDM tool is connect with the host computer；
The host computer：Detection instruction is sent for communicating with off-line test instrument (EOL) to DCU, and in self-check program knot
Shu Hou receives off-line test instrument (EOL) and sends detection CAN message；
The BDM tool：For writing with a brush dipped in Chinese ink detection program to DCU；
The off-line test instrument (EOL)：For sending detection instruction to DCU, and detection CAN message is sent to host computer；
The detection circuit：For connecting into circuit with DUC circuit board, and for responding detection program to DCU circuit board
Each switch carries out sequence detection.
Wherein, the detection circuit includes that at least four tunnels are corresponding with the output control terminal of DCU by NPN triode group
At switching circuit, the load resistance of the switching circuit with it is several routing divider resistances constitute bleeder circuits be connected；Institute
It states input port of the voltage output end of bleeder circuit with the DCU and connects and composes signal transmission loop.The detection circuit
It further include at least three tunnels voltage transmission circuit being made of current-limiting resistor corresponding with the output control terminal of DCU, it is described
Voltage transmission circuit is connected with the bleeder circuit that several routing divider resistances are constituted；The voltage output end of the bleeder circuit is equal
Signal transmission loop is connected and composed with the input port of the DCU.
The self-checking system further includes for the DCU connection detection circuit, BDM tool and off-line test instrument (EOL)
Integrated detection harness；The integrated detection harness includes that one end passes through plug connector female end and the DCU principal wire bundle connecting and three
Branch's harness that branch is connect with the principal wire bundle, three branch's harness pass through jtag interface female end and detection electricity respectively
Road connection is connect with BDM tool by interface and is connect by II female end of OBD with off-line test instrument (EOL).
In order to preferably realize foregoing invention purpose, present invention also provides a kind of detection method of DCU circuitry self test, institutes
Stating detection method is specially：
Step S1：Host computer is connect by BDM tool, off-line test instrument (EOL) with DCU, circuit is will test and DCU connects
It connects；
Step S2：Host computer carries out hardware initialization to DCU by BDM tool；
Step S3：Host computer detects DCU by off-line test instrument (EOL), and detecting step is specially：
Step S301：Host computer issues interrupt signal, and is sent in safety certification by lower limit detector (EOL) to DCU
Break signal, the success if host computer and DCU shake hands, carries out step S302, if host computer shake hands with DCU it is unsuccessful, again into
The interaction of row handshaking information；
Step S302：Whether lower limit detector (EOL) detection host computer, which issues, starts self-test order, if off-line test instrument
(EOL) self-test order is received, then carries out successively detecting DCU circuit board core function；
Step S303：If the testing result of any core function is exception, it is concurrent that off-line test instrument (EOL) merges message
To host computer, and return step S302；If all core function testing results are normally, to continue the ATD to DCU circuit board
Input terminal is successively detected；
Step S304：If the ATD input terminal of DCU circuit board all has problem, off-line test instrument (EOL) merges report
Text simultaneously issues host computer, and return step S302；If detect one and the above ATD input terminal result be it is normal, utilize head
A testing result is normal ATD input terminal, to detect all output ends, and by the testing result of ATD input terminal and output end
Synthesis message simultaneously issues host computer, and return step S202；
Step S305, off-line test instrument (EOL) detects the interruption self-test order that host computer is sent, then entire detection process
Terminate.
Wherein, the step S301 is specially：Host computer sends first to DUC by off-line test instrument (EOL) and shakes hands
Information, DUC receives first handshaking information and is parsed to obtain parsing result by algorithm, and parsing result is sent back to
Position machine, whether host computer verifies parsing result correct, if correctly, sending shake hands successful information and subsequent match code again,
DCU is received shake hands successful information after, compare subsequent match code after carry out following detection step.
The handshaking information is 8 bytes, wherein preceding 2 bytes are mark of shaking hands, rear 6 bytes are accidental enciphering generation
Code；The parsing result is that DCU is decrypted to obtain by algorithm to accidental enciphering code.
Wherein, in the step S302, the detection of the core function includes detection, the main power supply of equipment of supply voltage
The detection of the detection of DCDC output voltage and CAN line in normal condition voltage.
Wherein, in the step S304, the detection to ATD input terminal and output end is by one and the DCU input terminal
The detection circuit that connects with output end is realized.
The detection circuit includes that at least four tunnels are corresponding with the output control terminal of DCU to be opened by what NPN triode formed
Powered-down road, the load resistance of the switching circuit are connected with the bleeder circuit that several routing divider resistances are constituted；The partial pressure
Input port of the voltage output end of circuit with the DCU connects and composes signal transmission loop.The detection circuit further includes
At least three tunnels voltage transmission circuit being made of current-limiting resistor corresponding with the output control terminal of DCU, the voltage pass
Transmission of electricity road is connected with the bleeder circuit that several routing divider resistances are constituted；The voltage output end of the bleeder circuit with it is described
The input port of DCU connects and composes signal transmission loop.
The DCU is connected by an integrated detection harness and the detection circuit, BDM tool and off-line test instrument (EOL)
It connects；The integrated detection harness includes that one end passes through plug connector female end and the DCU principal wire bundle connecting and three and the master
Branch's harness of harness connection, three branch's harness pass through JTAG interface female end respectively and connect with the detection circuit, is logical
Interface is crossed to connect with BDM tool and connect by II female end of OBD with off-line test instrument (EOL).Wherein, DCU has two speed
Two speed CAN lines are connect by CAN line with off-line test instrument (EOL), wherein with two in connection off-line test instrument branch harness
The connecting line of bar speed CAN line connection is respectively connected with the resistance of one 120 Ω, two 120 Ω resistor coupled in parallel, and connects two speed
The connecting line of CAN line distinguishes multiple twin, plays the role of reducing interference.
The beneficial effects of the invention are as follows：Monitoring system of the invention can detect automatically circuit before DCU circuit board fills shell
Whether there is or not Welding Problems, singlechip chips fault-free for plate input/output terminal, solves circuit board because of detection caused by original part failure
The vehicle that carries out there are problem of discovery DCU is done over again phenomenon after limit deviation, and dress shell entrucking.
Detailed description of the invention
Fig. 1 is the structural block diagram of the embodiment of the present invention 1 and 2.
Fig. 2 is the circuit diagram of detection circuit in the embodiment of the present invention 1 and 2.
Fig. 3 is the structural schematic diagram that detection harness is integrated in the embodiment of the present invention 1 and 2.
Fig. 4 is the flow diagram of the embodiment of the present invention 2.
Specific embodiment
In order to clarify the technical characteristics of the invention, being illustrated below by specific embodiment to this programme.
1 self-checking system of embodiment
The embodiment of the invention provides a kind of DCU circuitry self test systems, and referring to Fig. 1, the self-checking system includes：With it is described
Detection circuit, BDM tool and the off-line test instrument (EOL) of DCU connection, and it is logical by off-line test instrument (EOL) and the DCU
Interrogate the host computer of connection；The BDM tool is connect with the host computer；
The host computer：Detection instruction is sent for communicating with off-line test instrument (EOL) to DCU, and in self-check program knot
Shu Hou receives off-line test instrument (EOL) and sends detection CAN message；
The BDM tool：For writing with a brush dipped in Chinese ink detection program to DCU；
The off-line test instrument (EOL)：For sending detection instruction to DCU, and detection CAN message is sent to host computer；
The detection circuit：For connecting into circuit with DUC circuit board, and for responding detection program to DCU circuit board
Each switch carries out sequence detection.
Wherein, the detection circuit includes that at least four tunnels are corresponding with the output control terminal of DCU by NPN triode group
At switching circuit, the load resistance of the switching circuit with it is several routing divider resistances constitute bleeder circuits be connected；Institute
It states input port of the voltage output end of bleeder circuit with the DCU and connects and composes signal transmission loop.The detection circuit
It further include at least three tunnels voltage transmission circuit being made of current-limiting resistor corresponding with the output control terminal of DCU, it is described
Voltage transmission circuit is connected with the bleeder circuit that several routing divider resistances are constituted；The voltage output end of the bleeder circuit is equal
Signal transmission loop is connected and composed with the input port of the DCU.Referring to fig. 2, the state output terminal of DCU circuit is different, may
Be direct output be also likely to be the end DCU it is to switch metal-oxide-semiconductor or triode output, now directly export with 3 tunnels, the 4 road ends DCU are grasped
Make metal-oxide-semiconductor output, 7 road ATD input for, circuit diagram as shown in Fig. 2, wherein in switching circuit triode base resistance resistance value
Parallel resistance resistance value is 2k Ω between 6.8k Ω, base stage and emitter, the load resistance of collector is 1k Ω；Bleeder circuit
It is made of the resistance that two resistance values are 1k Ω.Due to DUC circuit input end ATD more have pull-up resistor, so do not need additionally be
Detection circuit increases power end；The precision of two divider resistances of the load resistance and bleeder circuit of collector is below 1%.
Referring to Fig. 3, the self-checking system further includes for the DCU connection detection circuit, BDM tool and off-line test instrument
(EOL) integrated detection harness；The integrated detection harness includes that one end passes through the main line that plug connector female end is connect with the DCU
Beam and three branch's harness being connect with the principal wire bundle, three branch's harness pass through respectively jtag interface female end with it is described
Detection circuit connection is connect with BDM tool by interface and is connect by II female end of OBD with off-line test instrument (EOL).
2 detection method of embodiment
Referring to fig. 4, the embodiment of the invention provides a kind of detection method of DCU circuitry self test, the detection method is specific
For：
Step S1：Host computer is connect by BDM tool, off-line test instrument (EOL) with DCU, circuit is will test and DCU connects
It connects；
Step S2：Host computer carries out hardware initialization to DCU by BDM tool；
Step S3：Host computer detects DCU by off-line test instrument (EOL), and detecting step is specially：
Step S301：Host computer issues interrupt signal, and is sent in safety certification by lower limit detector (EOL) to DCU
Break signal, the success if host computer and DCU shake hands, carries out step S302, if host computer shake hands with DCU it is unsuccessful, again into
The interaction of row handshaking information；
Step S302：Whether lower limit detector (EOL) detection host computer, which issues, starts self-test order, if off-line test instrument
(EOL) self-test order is received, then carries out successively detecting DCU circuit board core function；
Step S303：If the testing result of any core function is exception, it is concurrent that off-line test instrument (EOL) merges message
To host computer, and return step S302；If all core function testing results are normally, to continue the ATD to DCU circuit board
Input terminal is successively detected；
Step S304：If the ATD input terminal of DCU circuit board all has problem, off-line test instrument (EOL) merges report
Text simultaneously issues host computer, and return step S302；If detect one and the above ATD input terminal result be it is normal, utilize head
A testing result is normal ATD input terminal, to detect all output ends, and by the testing result of ATD input terminal and output end
Synthesis message simultaneously issues host computer, and return step S202；
Step S305, off-line test instrument (EOL) detects the interruption self-test order that host computer is sent, then entire detection process
Terminate.
Wherein, the step S301 is specially：Host computer sends first to DUC by off-line test instrument (EOL) and shakes hands
Information, DUC receives first handshaking information and is parsed to obtain parsing result by algorithm, and parsing result is sent back to
Position machine, whether host computer verifies parsing result correct, if correctly, sending shake hands successful information and subsequent match code again,
DCU is received shake hands successful information after, compare subsequent match code after carry out following detection step.
The handshaking information is 8 bytes, wherein preceding 2 bytes are mark of shaking hands, rear 6 bytes are accidental enciphering generation
Code；The parsing result is that DCU is decrypted to obtain by algorithm to accidental enciphering code.
Wherein, in the step S302, the detection of the core function includes detection, the main power supply of equipment of supply voltage
The detection of the detection of DCDC output voltage and CAN line in normal condition voltage.In order to guarantee that circuit board in the detection process will not
Safety problem is generated, core function need to successively be detected according to security-critical grade, be asked as long as detecting that a core function exists
Topic, it is necessary to jump back out to and merge message and be sent to host computer；Because one of core function, there are problem, follow-up test must
It is so problematic or can possibly even cause subsequent hardware damage.Wherein, off-line test has been added with message is merged in safety certification
The communications protocol of instrument and host computer.
Wherein, in the step S304, the detection to ATD input terminal and output end is by one and the DCU input terminal
The detection circuit that connects with output end is realized.Detection circuit includes that at least four tunnels are corresponding with the output control terminal of DCU
The partial pressure that the switching circuit being made of NPN triode, the load resistance of the switching circuit and several routing divider resistances are constituted
Circuit is connected；Input port of the voltage output end of the bleeder circuit with the DCU connects and composes signal transmission loop.
The detection circuit further includes at least three tunnels voltage transmission being made of current-limiting resistor corresponding with the output control terminal of DCU
Circuit, the voltage transmission circuit are connected with the bleeder circuit that several routing divider resistances are constituted；The bleeder circuit
Input port of the voltage output end with the DCU connects and composes signal transmission loop.Referring to fig. 2, the output end shape of DCU circuit
State is different, it may be possible to which it is to switch metal-oxide-semiconductor or triode output that directly output, which is also likely to be the end DCU, is now directly exported with 3 tunnels, 4
The road end DCU operate metal-oxide-semiconductor output, 7 road ATD input for, circuit diagram as shown in Fig. 2, wherein in switching circuit triode base
Electrode resistance resistance value is 6.8k Ω, parallel resistance resistance value is 2k Ω between base stage and emitter, the load resistance of collector is 1k Ω；
Bleeder circuit is made of the resistance that two resistance values are 1k Ω.Since DUC circuit input end ATD has pull-up resistor more, so being not required to
Additionally to increase power end for detection circuit；The precision of two divider resistances of the load resistance and bleeder circuit of collector exists
Within 1%.
Referring to Fig. 3, the DCU passes through an integrated detection harness and the detection circuit, BDM tool and off-line test instrument
(EOL) it connects；The integrated detection harness includes that one end passes through plug connector female end and the DCU principal wire bundle connecting and three
The branch's harness connecting with the principal wire bundle, three branch's harness pass through jtag interface female end and the detection circuit respectively
Connection is connect with BDM tool by interface and is connect by II female end of OBD with off-line test instrument (EOL).Wherein, DCU has
Two speed CAN lines are connect by two speed CAN lines with off-line test instrument (EOL), wherein connection off-line test instrument branch harness
In the connecting line that is connect with two speed CAN lines be respectively connected with the resistance of one 120 Ω, two 120 Ω resistor coupled in parallel, and connect two
The connecting line of bar speed CAN line distinguishes multiple twin, plays the role of reducing interference.
Embodiment 3
To need to detect three core functions, 7 ATD input terminals for 7 output ends, merge message is described in detail
It sends.Three core functions, 7 ATD input terminals, 7 output ends need to issue an expansion frame.Wherein canbuf0 [0] is fixed
Justice is subsequent also how many byte CAN message, and canbuf0 [1] and canbuf0 [2] are the protocol with host computer,
Canbuf0 [3] to canbuf0 [7] is specific testing result (can be extended according to specific detection number).
Following is color legend
" message Byte number " is that slave computer tells that how many subsequent message of host computer is effective word joint number (containing this) above,
Online is 255, such as canbuf0 [0] is 0x1A, then the meaning is, plus this message, one shares 26 bytes, four messages
For this communication packet (8 bytes of a message).
Canbuf0 [1] and canbuf0 [2] is related protocol message, the specially function declaration of this message of slave computer,
It namely conveys the effect of this message to indicate DCU self-test situation, upper computer software is facilitated to parse.
Subsequent packet is all defaulted as FF, and each part detection accounts for the size of two Bit, and both certain A module was not when detecting
State is 0b11, this function, which defines each module, 4 kinds of states, and 0b11 is non-detecting state, and 0b00 is to detect problematic shape
State, 0b01 are detection normal condition, and 0b10 is reservation state.By taking the following figure as an example, if the value of canbuf0 [4] is
0b11000101 is detected normally then representing output end 3, and output end 4 detects normally, and output end 5 detects abnormal, output end 6
(being not in that output end has detection to have the message not detected in real process, this example is only for explanation) is not detected.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of DCU circuitry self test system, which is characterized in that the self-checking system includes：The detection electricity being connect with the DCU
Road, BDM tool and off-line test instrument（EOL）, and pass through off-line test instrument（EOL）With the host computer of the DCU communication connection；
The BDM tool is connect with the host computer；
The host computer：For with off-line test instrument（EOL）It communicates to DCU and sends detection instruction, and after self-check program,
Receive off-line test instrument（EOL）Send detection CAN message；
The BDM tool：For writing with a brush dipped in Chinese ink detection program to DCU；
The off-line test instrument（EOL）：For sending detection instruction to DCU, and detection CAN message is sent to host computer；
The detection circuit：For connecting into circuit with DUC circuit board, and DCU circuit board is respectively opened for responding detection program
Put row sequence detection into.
2. DCU circuitry self test system according to claim 1, which is characterized in that the detection circuit includes at least four tunnels
The switching circuit being made of NPN triode corresponding with the output control terminal of DCU, if the load resistance of the switching circuit with
The bleeder circuit that main line is made of divider resistance is connected；Input of the voltage output end of the bleeder circuit with the DCU
Port connects and composes signal transmission loop.
3. DCU circuitry self test system according to claim 1, which is characterized in that the detection circuit further includes at least three
The road voltage transmission circuit being made of current-limiting resistor corresponding with the output control terminal of DCU, the voltage transmission circuit
The bleeder circuit constituted with several routing divider resistances is connected；The voltage output end of the bleeder circuit is with the DCU's
Input port connects and composes signal transmission loop.
4. DCU circuitry self test system according to claim 1 or 2, which is characterized in that further include for described in DCU connection
Detection circuit, BDM tool and off-line test instrument（EOL）Integrated detection harness；The integrated detection harness includes that one end passes through
Branch's harness that plug connector female end is connect with the DCU principal wire bundle connecting and three with the principal wire bundle, three branches
Harness passes through jtag interface female end respectively and connect with the detection circuit, connect and pass through OBD with BDM tool by interface
II female end and off-line test instrument（EOL）Connection.
5. a kind of detection method of DCU circuitry self test, which is characterized in that the detection method is specially：
Step S1：Host computer is passed through into BDM tool, off-line test instrument（EOL）It is connect with DCU, will test circuit and connect with DCU；
Step S2：Host computer carries out hardware initialization to DCU by BDM tool；
Step S3：Host computer passes through off-line test instrument（EOL）DCU is detected, detecting step is specially：
Step S301：Host computer issues interrupt signal, and passes through lower limit detector（EOL）Safety certification, which is sent, to DCU interrupts letter
Number, the success if host computer and DCU shake hands carries out step S302, if host computer is shaken hands unsuccessful with DCU, is held again
Hand information exchange；
Step S302：Lower limit detector（EOL）Whether detection host computer, which issues, starts self-test order, if off-line test instrument（EOL）
Self-test order is received, then carries out successively detecting DCU circuit board core function；
Step S303：If the testing result of any core function is abnormal, off-line test instrument（EOL）Merge message and issues
Position machine, and return step S302；If all core function testing results are normally, to continue the ATD input to DCU circuit board
It is successively detected at end；
Step S304：If all there is problem, off-line test instrument in the ATD input terminal of DCU circuit board（EOL）It is concurrent to merge message
To host computer, and return step S302；If detect one and the above ATD input terminal result be it is normal, utilize first detection
As a result it is normal ATD input terminal, to detect all output ends, and the testing result of ATD input terminal and output end is synthesized and is reported
Text simultaneously issues host computer, and return step S202；
Step S305, off-line test instrument（EOL）Detect the interruption self-test order that host computer is sent, then entire detection process knot
Beam.
6. the detection method of DCU circuitry self test according to claim 4, which is characterized in that the step S301 is specially：
Host computer passes through off-line test instrument（EOL）First handshaking information is sent to DUC, DUC receives first handshaking information and leads to
It crosses algorithm to be parsed to obtain parsing result, and parsing result is sent back into host computer, whether host computer verifying parsing result is correct,
If correct, send shake hands successful information and subsequent match code again, DCU is received shake hands successful information after, compare subsequent
Following detection step is carried out after matching code.
7. the detection method of DCU circuitry self test according to claim 5, which is characterized in that the handshaking information is 8 words
Section, wherein preceding 2 bytes are mark of shaking hands, rear 6 bytes are accidental enciphering code；The parsing result is that DCU passes through algorithm
Accidental enciphering code is decrypted to obtain.
8. the detection method of DCU circuitry self test according to claim 1-7, which is characterized in that the step
In S303, the detection of the core function includes the detection of supply voltage, the detection of the main power supply DCDC output voltage of equipment and CAN
Detection of the line in normal condition voltage.
9. the detection method of DCU circuitry self test according to claim 1-8, which is characterized in that the step
In S304, the detection to ATD input terminal and output end is the detection circuit connecting by one with the DCU input terminal and output end
Come what is realized；
The detection circuit includes at least four tunnels switch electricity being made of NPN triode corresponding with the output control terminal of DCU
Road, the load resistance of the switching circuit are connected with the bleeder circuit that several routing divider resistances are constituted；The bleeder circuit
Input port of the voltage output end with the DCU connect and compose signal transmission loop；The detection circuit further includes at least
The three tunnels voltage transmission circuit being made of current-limiting resistor corresponding with the output control terminal of DCU, the voltage transmission electricity
Road is connected with the bleeder circuit that several routing divider resistances are constituted；The voltage output end of the bleeder circuit with the DCU
Input port connect and compose signal transmission loop.
10. the detection method of DCU circuitry self test according to claim 8 or claim 9, which is characterized in that the DCU passes through one
Integrated detection harness and the detection circuit, BDM tool and off-line test instrument（EOL）Connection；The integrated detection harness includes
Branch's harness that one end is connect with the DCU principal wire bundle connecting and three with the principal wire bundle by plug connector female end, three
Branch's harness pass through respectively jtag interface female end connect with the detection circuit, connect with BDM tool by interface and
Pass through II female end of OBD and off-line test instrument（EOL）Connection.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110333436A (en) * | 2019-07-05 | 2019-10-15 | 江苏迈库通信科技有限公司 | A kind of detection method of coded communication plate |
| CN114153195A (en) * | 2021-11-30 | 2022-03-08 | 中国重汽集团济南动力有限公司 | Automatic offline detection and calibration system for vehicle electric control braking function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718990A (en) * | 2009-11-21 | 2010-06-02 | 镇江恒驰科技有限公司 | Simulation test device and simulation test method for electronic control unit (ECU) of engine |
| CN102043408A (en) * | 2010-12-30 | 2011-05-04 | 力帆实业(集团)股份有限公司 | Electronic control unit (ECU) offline detection method |
| CN202975794U (en) * | 2012-11-27 | 2013-06-05 | 南京直觉科技有限公司 | Portable electric-control diesel engine ECU (Electronic Control Unit) writing system |
| CN203894374U (en) * | 2014-04-29 | 2014-10-22 | 中国重汽集团济南动力有限公司 | DCU testing casing |
| CN104181918A (en) * | 2014-09-19 | 2014-12-03 | 中国重汽集团济南动力有限公司 | DCU electrical control unit testing system |
| CN105301491A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | State monitoring circuit for breaker with auxiliary contacts |
| CN105824307A (en) * | 2016-05-13 | 2016-08-03 | 上汽通用五菱汽车股份有限公司 | System and method for distributed offline detection of comprehensive performance of automobile electric-control module |
| CN208999822U (en) * | 2018-05-09 | 2019-06-18 | 中国重汽集团济南动力有限公司 | A kind of DCU circuitry self test system |
-
2018
- 2018-05-09 CN CN201810436183.XA patent/CN108896901B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718990A (en) * | 2009-11-21 | 2010-06-02 | 镇江恒驰科技有限公司 | Simulation test device and simulation test method for electronic control unit (ECU) of engine |
| CN102043408A (en) * | 2010-12-30 | 2011-05-04 | 力帆实业(集团)股份有限公司 | Electronic control unit (ECU) offline detection method |
| CN202975794U (en) * | 2012-11-27 | 2013-06-05 | 南京直觉科技有限公司 | Portable electric-control diesel engine ECU (Electronic Control Unit) writing system |
| CN203894374U (en) * | 2014-04-29 | 2014-10-22 | 中国重汽集团济南动力有限公司 | DCU testing casing |
| CN104181918A (en) * | 2014-09-19 | 2014-12-03 | 中国重汽集团济南动力有限公司 | DCU electrical control unit testing system |
| CN105301491A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | State monitoring circuit for breaker with auxiliary contacts |
| CN105824307A (en) * | 2016-05-13 | 2016-08-03 | 上汽通用五菱汽车股份有限公司 | System and method for distributed offline detection of comprehensive performance of automobile electric-control module |
| CN208999822U (en) * | 2018-05-09 | 2019-06-18 | 中国重汽集团济南动力有限公司 | A kind of DCU circuitry self test system |
Non-Patent Citations (1)
| Title |
|---|
| 何亮: "基于LabVIEW的电动汽车整车下线检测***的研究与开发", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110333436A (en) * | 2019-07-05 | 2019-10-15 | 江苏迈库通信科技有限公司 | A kind of detection method of coded communication plate |
| CN114153195A (en) * | 2021-11-30 | 2022-03-08 | 中国重汽集团济南动力有限公司 | Automatic offline detection and calibration system for vehicle electric control braking function |
| CN114153195B (en) * | 2021-11-30 | 2024-05-10 | 中国重汽集团济南动力有限公司 | Automatic offline detection and calibration system for vehicle electric control braking function |
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