CN108230810A - A kind of automobile basic circuit fault diagnosis checking system and method - Google Patents
A kind of automobile basic circuit fault diagnosis checking system and method Download PDFInfo
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- CN108230810A CN108230810A CN201810070185.1A CN201810070185A CN108230810A CN 108230810 A CN108230810 A CN 108230810A CN 201810070185 A CN201810070185 A CN 201810070185A CN 108230810 A CN108230810 A CN 108230810A
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- failure
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- basic circuit
- fault diagnosis
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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Abstract
The invention belongs to vehicle teaching technical fields, disclose a kind of automobile basic circuit fault diagnosis checking system and implementation.Relay is controlled using switching, then based on the circuit by relay control light bulb；With microcontroller, center connect acquisition relevant information in real time with serial ports screen in order to control；Microcontroller controls 19 relays, in real time projects " failure " in basic circuit.After system, which enters, sets the exam state, start countdown, " failure " is projected in circuit；Student carries out fault diagnosis using examination lamp, multimeter or jumper to circuit at this time, confirms that a part is deposited after the failure, clicks the open circuit of corresponding position or virtual connection button on a display screen.System can list troubleshooting inventory and student's total marks of the examination after examination.The present invention is highly stable in practical applications；Student is made to grasp examination lamp, multimeter and the use of bridging more secured.During examination can also multiple devices be carried out at the same time, improve examination efficiency.
Description
Technical field
The invention belongs to vehicle teaching technical field more particularly to a kind of automobile basic circuit fault diagnosis checking systems
And method.
Background technology
《Implement automobile circuit primary to safeguard》During course teaching, learner can know in addition to master basic knowledge
Outside figure, analysis circuit figure, an also important basic skills --- event can be carried out to circuit with examination lamp, multimeter and jumper
Barrier investigation.The technical ability for using " examination lamp ", " multimeter ", " jumper " progress automobile circuit breakdown diagnosis currently for student is examined
Kernel mode is still based on manually examining.The process of the examination of student is very long waiting process, and general every teacher supervises simultaneously
The time spent in examining 1 student of 2 students or even invigilator, completing the examination of full class or annual grade student is very long, examination
Be over the work order that also spend a lot of time and arrange student, improves performance rating；Because the examination time is long, invigilator teacher may go out
The difference of existing fatigue or each invigilator's teachers ability level, judges the score of the examination of student by accident；Artificial examination process
In, invigilator teacher may be different to " impression " of student, and also the score of the examination can be had an impact.
In conclusion problem of the existing technology is：Efficiency of the practice is low.Examination process, work order arrange and achievement is commented
Surely it can spend a lot of time；Implementing the phenomenon that examination is judged by accident in the process can not avoid；The fairness of examination process.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of automobile basic circuit fault diagnosis checking systems
And method.
The invention is realized in this way a kind of automobile basic circuit fault diagnosis checking system, automobile basic circuit failure
Diagnosis checking system includes：
Basic circuit is used to implement switch control relay, then controls light bulb by relay；
Failure projects circuit, controls 19 relays by microcontroller, in real time projects 19 failures in basic circuit
It goes；
Display screen is used to implement fault setting and the display of diagnostic result；
Microcontroller is used to implement the control to serial ports screen information exchange and failure projection circuit.With serial ports screen information exchange
It is realized by voidIOTask (void*p_arg) task；Failure projection circuit control is by void ControlTask (void*p_
Arg) task is realized.
19 relays are controlled by microcontroller, " failure " is projected to a kind of automobile base gone in basic circuit in real time
This circuit fault diagnosis checking system, the automobile basic circuit fault diagnosis checking system include：Basic circuit, failure are thrown
Transmit-receive radio road, display screen and microcontroller.Microcontroller is connected with display screen by serial ports, realizes the event that failure setting, student confirm
The interaction of the information such as barrier and position；Microcontroller is controlled by GPIO interface and projects circuit by the failure that 19 relays form, real
When will setting " failure " project in basic circuit；Basic circuit is that common relay control bulb circuit is on automobile
12 positions (including 7 section lead positions) in circuit are together in series by basis with failure projection circuit respectively.
Another object of the present invention is to provide a kind of side of the automobile basic circuit fault diagnosis checking system
Method, the automobile basic circuit fault diagnosis checking system realization include the following steps：
Step 1, student click button screen when button bounces, and screen is sent to microcontroller serial port by serial ports and touched
Message.
Message format：0X65 page ID button ID end marks
Step 2 after microcontroller is connected to message, (is connect to IOTask tasks transmission data update characteristic events by serial ports
It receives interrupt routine to realize).
IOTask tasks can authorize operation by data update mark or End Event flag set.
Step 3, IOTask tasks go to read screen data, and be saved in system variable according to update characteristic events.
IOTask tasks send out display data to screen according to button information or changing interface instructs, and are sent out to ControlTask tasks
Task message.
Step 4, ControlTask tasks handle control failure projection electricity in real time according to the screen data of reading
Failure projection is realized on road.ControlTask tasks realize countdown function simultaneously, switch system mode when the time is 0
To examination end state, and set End Event flag bit.
Step 5, IOTask tasks send out student's examination knot because authorizing operation after End Event flag bit set, to screen
Fruit inventory terminates examination.
Explanation：
1) system variable is structure variable, and Major Members variable is as follows：
Vsystem.DLCSet- failures setting variable (data format such as following table)
Vsystem.DLCDart- failures projection variable (data format is same as above)
Vsystem.DLCUser- user's confirmation message (data format is same as above)
Vsystem.DLCStatus- troubleshooting stages (data format is same as above)
Vsystem.Time- test times variable (when being 0, examination terminates)
Vsystem.EventStatus- event flags group (every represents different event)
Vsystem.Status- system state variables (enumeration type variable, have examination before, examination in, examination terminate, failure
4 kinds of states are set)
2) DLCSet data types explanation：
For variable for 32 without symbol shaping variable, Bit24-Bit31 is retention position 0, and when corresponding position 1, which represents, to be existed
Failure；Fault-free when setting to 0.
3) it is that student confirms number of faults by calculating 1 units in vsystem.DLCUser variable binary digits；
The position for calculating in vsystem.DLCSet variable binary digits 1 is failure setting quantity；Failure projects variable
Vsystem.DLCDart=vsystem.DLCSet＆ (vsystem.DLCSet^ vsystem.DLCUser)；
4) ControlTask tasks are by judging whether vsystem.Time is 0 or confirms whether number of faults is equal to event
Barrier setting quantity, if condition meets puts 1 by End Event mark, triggering IOTask tasks export fault clearance result to screen
That is vsystem.DLCSet and vsystem.DLCDart variables and achievement.
5) after serial ports screen receives data, by upper sheet format to vsystem.DLCSet and vsystem.DLCDart data
It can obtain failure setting and fault clearance result after step-by-step processing.
The present invention is in practical applications, highly stable；Make student is allowed to practice examination lamp, multimeter and jumper in teaching
It uses, student is allowed to grasp more secured to examination lamp, multimeter and the use of bridging；Examination can also multiple devices simultaneously into
Row improves examination efficiency, if each teacher is examined to invigilate two students in a conventional manner, with equipment examination, each invigilator is old
Teacher can monitor simultaneously 4 it is even more, efficiency is that 2 times manually examined are even more.
Description of the drawings
Fig. 1 is automobile basic circuit fault diagnosis checking system structure diagram provided in an embodiment of the present invention；
In figure：1st, basic circuit+failure projection circuit；2nd, microcontroller；3rd, display screen.
Fig. 2 is automobile basic circuit fault diagnosis wire examination method flow chart provided in an embodiment of the present invention.
Fig. 3 is single chip circuit connection diagram provided in an embodiment of the present invention.
In figure：P1 is power interface.The interface connects 12V, 5V dual power supply.
Fig. 4 is basic circuit provided in an embodiment of the present invention+failure projection circuit connection diagram.
Fig. 5 is basic circuit provided in an embodiment of the present invention+failure projection circuit partial enlargement connection diagram.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to this hair
It is bright to be further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, automobile basic circuit fault diagnosis checking system provided in an embodiment of the present invention includes：Relay
Control bulb circuit 1, microcontroller 2, display screen 3.
Microcontroller 1 (STM32F103) is connect with relay control bulb circuit 1, display screen 3.
As shown in Fig. 2, automobile basic circuit fault diagnosis wire examination method provided in an embodiment of the present invention includes following step
Suddenly：
S201：19 failures (open circuit and virtual connection failure) in microcontroller control relay control bulb circuit；By setting
Failure is thrown into real time in relay control bulb circuit；Start simultaneously at countdown；
S202：Fault diagnosis is carried out to circuit using examination lamp, multimeter or jumper, confirm a part there are failure it
Afterwards, " open circuit " or " virtual connection " button of corresponding position is clicked on a display screen；If correct judgment, system can " removing " should immediately
Failure, system can provide student's achievement and the result of fault clearance automatically at the end of examination.
In Fig. 3, P2 is debugging serial ports.The interface can connect computer serial port and be debugged or system detectio.P3 is serial ports screen
Data-interface.The interface connects serial ports screen, and power supply and data interaction are provided for serial ports screen.VCC ports and VCC phases in Fig. 4 in figure
Even, the power supply of 5V is provided for failure projection circuit；V12 ports are connected with V12 in Fig. 4, and the power supply of 12V is provided to basic circuit；
GND ports are connected with GND in Fig. 4, dual power supply common ground.A [0..15] and B [0..15] ports and Fig. 4 corresponding ports phase
Even, power transfer relay is respectively driven so as to control basic circuit " failure " state.
VCC, V12 and GND port are connected respectively with Fig. 3 corresponding ports in Fig. 4, so as to obtain power supply； A[0..15]、B
[0..15] is connected with Fig. 3 corresponding ports, respectively drives JK1 --- and JK19 power transfer relays realize " failure " projection.
Microcontroller GPIO and 19 failures can be seen that after device connection relation such as following table by Fig. 3 and Fig. 4
Fig. 5 is the partial enlarged view of Fig. 4.Power supply is illustrated to connect to switch wire local circuit.In figure V12 ports with
V12 ports are connected in Fig. 3, are 12 positive poles；Be between instrument connection P4 and P5 power supply to switch wire part, between go here and there side
JK1 virtual connections power transfer relay and JK2 open fault relays.No. 3 feet of P4 and JK1 relays are connect, No. 5 feet of JK1 with
No. 3 feet connection of JK2, then connect P5 instrument connections by No. 5 feet of JK2；Go here and there a virtual connection resistance R1 between No. 4 feet and No. 5 feet of JK1.
No. 1 foot ground connection of each relay, No. 2 feet and the output of 817 Phototube Couplings connect, and pass through the 1 of microcontroller control 817
So as to make the corresponding failure actuating of relay, virtual connection resistance or open circuit are introduced into circuit for number foot level (high level is effective).
1) N number of test node of circuit is numbered successively from 1 to N, with the minimum grid of x, y both direction institute
Some test nodes separate, and the element value at abortive haul lattice is filled with 1, using the matrix that grid is formed as circuit test node
Location matrix P, the size of location matrix is the size of grid number；It 2), will be in location matrix P under circuit normal condition
Represent that the element value of test node number replaces with the signal characteristic value of node at this, obtain circuit it is normal when test node
Energy matrix EN；3) the node signal characteristic value in energy matrix EN is taken out, since node 1, calculates each node respectively
With the correlative between all node signals other on circuit, using the correlative of each node and other node signals as matrix
A line, correlation matrix RN of one symmetrical matrix of construction as circuit test node when normal；4) in fault state
Under, the element value that test node number is represented in location matrix P is replaced with to the signal characteristic value of node at this, obtains circuit
The energy matrix EF of test node during failure；5) the node signal characteristic value in energy matrix EF is taken out, since node 1,
The signal correlative between other all nodes on each node and circuit is calculated respectively, by the phase of each node and other nodes
A line as matrix is measured in pass, the correlation matrix RF of test node when one symmetrical matrix of construction is as fault；
A kind of diagnostic method for failure of switch current circuit, includes the following steps：Step 1)：To the electricity of Switched-Current Circuit
Flow data acquires；Step 2)：Pivot analysis processing and data X information are carried out successively for the current data acquired in step 1)
Inverse cloudization is handled；Step 3)：Wavelet-network model is carried out to the data being disposed in step 2) to build, then to small echo net
The weights of network model structure, threshold value carry out fish-swarm algorithm optimizing；Step 4)：The supplemental characteristic square obtained after step 2) processing
Battle array input step 3), gained optimal wavelet network model is trained test, compares element theory range of tolerable variance dictionary table, root
According to X against cloud layer output quantity, the positioning of fault element is realized.
Automobile basic circuit fault diagnosis checking system provided in an embodiment of the present invention is with relay control typical in automobile
Centered on bulb circuit 1 processed, relay is controlled to control 19 failures (open circuit and virtual connection events in bulb circuit 1 by microcontroller
Barrier)；Student throws into the failure of setting in relay control bulb circuit after clicking " starting to take an examination " in real time；It starts simultaneously at
Countdown.Fault diagnosis is carried out to circuit using examination lamp, multimeter or jumper, confirms that a part is deposited after the failure, aobvious
" open circuit " or " virtual connection " button of corresponding position is clicked in display screen.If correct judgment, system " can remove " failure immediately, directly
Student's achievement and the result of malfunction elimination can be provided automatically to system at the end of examination.Examination terminate condition be：Test time
System can terminate to take an examination automatically when reaching the number of faults of default to the number of faults that either student confirms.
Display screen 3 provided in an embodiment of the present invention can provide failure setting interface and main interface, every time can be with before examination
Failure and test time setting (being defaulted as 5 minutes) are set into failure setting interface, pressed if clicking " determining " after good failure
Button returns to main interface.After student clicks " starting to take an examination " button, start timing examination.Display screen 3 uses 7 cun of serial port liquid crystal screens,
It carries out information exchange in real time by serial ports and microcontroller 1.
Microcontroller 1 by failure setting projects in real time relay control bulb circuit 1 in, and by student confirm and
Existing failure is removed in real time；STM32F103 series is used as core, it is real based on FreeRTOSv9.0.0 operating systems
Show " input/output task ", " control task ", " LED light task " and " test assignment ".
Input/output task completes the information exchange with serial ports screen；Control task realizes the projection and removing of failure；
Whether LED light task realizes the flicker of LED light, occur for observing microcontroller 1 in real time " run and fly to crash ".
Test assignment is inputted by serial ports 1 and instructed mainly when system maintenance is detected, and directly controls failure projection electricity
Road, then the failure whether there is by artificial detection, so as to which whether failure judgement projection circuit is normal.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (5)
- A kind of 1. automobile basic circuit fault diagnosis checking system, which is characterized in that automobile basic circuit fault diagnosis examination system System includes：Basic circuit is used to implement switch control relay, then controls light bulb by relay；Failure projects circuit, controls 19 relays by microcontroller, in real time projects 19 failures in basic circuit；Display screen is used to implement fault setting and the display of diagnostic result；Microcontroller is used to implement the control to serial ports screen information exchange and failure projection circuit.
- 2. a kind of automobile basic circuit fault diagnosis of automobile basic circuit fault diagnosis checking system as described in claim 1 Wire examination method, which is characterized in that the automobile basic circuit fault diagnosis wire examination method includes the following steps：Step 1, by teacher is examined to set " failure " and examination time；The main interface of screen click " setting failure " button into Enter to set interface, failure and examination time are configured according to actual conditions, " determining " button is clicked after setting and returns to master Interface；Examination most multipotency sets 10 trouble points every time；Step 2, student take an exam；" starting to take an examination " button is clicked in screen main interface, system enters test state, at this time System set " failure " will be projected in circuit, and start countdown before；After system enters test state, student can go to search failure in basic circuit using lamp, multimeter or jumper is tried；Really Recognize a part to deposit after the failure, click the open circuit of corresponding position or virtual connection button on a display screen；Step 3, achievement confirm；After examination, system can list exclusion situation of the student to set " failure ", and provide Total marks of the examination；Student and examination teacher click " achievement confirmation " button after confirming to result, terminate examination；The condition that examination terminates：When the number of faults that test time terminates or student finds reaches set " failure " quantity, System terminates to take an examination automatically.
- 3. automobile basic circuit fault diagnosis wire examination method as claimed in claim 2, which is characterized in that the failure is opens Road failure and virtual connection failure.
- 4. automobile basic circuit fault diagnosis wire examination method as claimed in claim 2, which is characterized in that student's correct judgment Failure, system can remove " failure ", facilitate and continue to investigate other failures, until examination terminates.
- 5. automobile basic circuit fault diagnosis wire examination method as claimed in claim 2, which is characterized in that the microcontroller In circuit：P1 is power interface, connects 12V, 5V dual power supply；P2 is debugging serial ports, and company's computer serial port is debugged or system detectio；P3 is serial ports screen data-interface, connects serial ports screen, power supply and data interaction are provided for serial ports screen；VCC ports provide the power supply of 5V for failure projection circuit.
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| CN201810070185.1A CN108230810A (en) | 2018-01-24 | 2018-01-24 | A kind of automobile basic circuit fault diagnosis checking system and method |
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| CN201810070185.1A CN108230810A (en) | 2018-01-24 | 2018-01-24 | A kind of automobile basic circuit fault diagnosis checking system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110501609A (en) * | 2019-08-07 | 2019-11-26 | 龙岩学院 | A kind of electric fault detection system and detection method for cable |
| CN110599887A (en) * | 2019-08-08 | 2019-12-20 | 江苏汇博机器人技术股份有限公司 | Robot electric cabinet fault diagnosis system for practical training |
| CN111476374A (en) * | 2020-04-14 | 2020-07-31 | 重庆工业职业技术学院 | Pure electric vehicle electric appliance fault diagnosis training method and device based on neural network |
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| CN107093366A (en) * | 2017-05-27 | 2017-08-25 | 辽宁机电职业技术学院 | A kind of diagnosing faults of numerical control machine checking system and method |
| CN108074430A (en) * | 2016-11-15 | 2018-05-25 | 天津中德应用技术大学 | Electric fault sets system and method |
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| CN103337210A (en) * | 2013-06-20 | 2013-10-02 | 中山市技师学院 | Three-in-one device with teaching demonstration, practical training and examination functions |
| CN108074430A (en) * | 2016-11-15 | 2018-05-25 | 天津中德应用技术大学 | Electric fault sets system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110501609A (en) * | 2019-08-07 | 2019-11-26 | 龙岩学院 | A kind of electric fault detection system and detection method for cable |
| CN110599887A (en) * | 2019-08-08 | 2019-12-20 | 江苏汇博机器人技术股份有限公司 | Robot electric cabinet fault diagnosis system for practical training |
| CN111476374A (en) * | 2020-04-14 | 2020-07-31 | 重庆工业职业技术学院 | Pure electric vehicle electric appliance fault diagnosis training method and device based on neural network |
| CN111476374B (en) * | 2020-04-14 | 2022-09-27 | 重庆工业职业技术学院 | Pure electric vehicle electric appliance fault diagnosis training method and device based on neural network |
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Application publication date: 20180629 |
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