CN101515176B

CN101515176B - Detection device and detection method for electric control system

Info

Publication number: CN101515176B
Application number: CN2008101421587A
Authority: CN
Inventors: 郭春勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2012-02-08
Anticipated expiration: 2028-08-29
Also published as: CN101515176A

Abstract

The invention discloses a detection device for an electric control system, which is used for detecting the working condition of the electric control system and comprises a central processor module, a human-machine interface module, a power supply module and an interface module, wherein the central processor module switches off, switches on or switches the electric connection between an electronic control unit and an peripheral electronic component of the electronic control unit through the interface module, and generates signals required by the operation of the electric control system and/or measures signals input by the electric control signal; the interface module is used for transmitting the signals generated by the central processor module to the electric control signal and/or transmitting the signals generated by the electric control system to the central processor module; and the human-machine interface module is used for displaying or indicating operation steps, operation selections and detection results of the central processor module. The invention also discloses a detection method for the electric control system. The detection device and the detection method can determine fault positions of the electric control system quickly and accurately so as to achieve the aims of reducing the labor intensity for maintainers and improving the working efficiency.

Description

Electric-control system pick-up unit and detection method

[technical field]

The present invention relates to the electric-control system pick-up unit on transport facility and the engineering machinery, relate in particular to the automobile electric control system pick-up unit; The invention still further relates to and use this pick-up unit to detect the method for electric-control system, relate in particular to and use this pick-up unit to detect the method for electric-control system on the automobile.

[background technology]

Automobile, excavator, aircraft, boats and ships, electric motor car and the locomotive, the motor-car that are used for track transport all generally have electric-control system, and like the electric-control system of automobile, its complicated electronic circuit has higher requirement for the auto repair personnel.Because the educational level of present most of direct labor or service worker is low, the auto repair personnel often can not confirm abort situation fast, mainly only use following two kinds of methods to locate.

The following Fault Locating Method that the auto repair personnel use in the prior art:

One, substitution method is pulled down the electronic unit that suspect to damage, change one good, if fault disappears, just think that institute's electronic unit that changes damages.This method for maintaining principle is simple, and is also practical, but has defective in operation: so because more consuming time, the consumption power of manual steps.Maintenance such as automobile over-emitting black exhaust fault:

1, consumption power.Normally various electronic units such as cooling-water temperature sensor, throttle sensor, electronic control unit are pulled down one by one; This need at first get at the bottom of the car or open hood etc.; Just can tear electronic unit open then; If certain the electronic unit installation site on the car is hidden, also need to remove earlier corresponding mechanical part.

The electronic unit that need change after the dismounting replaces, and this will guarantee that the electronic unit of respective model such as sensor replace; And numerous owing to vehicle on the market, the electronic unit of respective model is difficult to look for, and normally looks for the car of a same model to dismantle exchange again, so it is many one times to increase the dismantlement work amount.

2, consuming time.Because the over-emitting black exhaust fault is relevant with a plurality of sensors, the vehicle electronic control unit internal electronics is damaged or the internal data entanglement also can produce the over-emitting black exhaust fault, and the maintenance personal needs replacement one by one, and repeatedly start-ups a car, and often the trouble spot is just found in examination to the end.

3, the vehicle electronic control unit price is higher; Most of vehicle is difficult to find the replacement part; Even it is the peripheral electron parts that the electronic control unit fault also can be checked earlier, replace coupled that the maintenance personal suspects; Like cooling-water temperature sensor, throttle sensor etc., in the time of all can not solving to the end, vehicle electronic control unit just can replace.And some fault is very big because of the possibility that vehicle electronic control unit causes, though the peripheral electron parts are influential, but possibility is little, and then first detected electrons control module is only correct.

Two, adopt and to transfer DTC and come the failure judgement position; Its principle is that electronic control unit carries out self check; With detected fault with the stores of digital code in electronic control unit, operational failure sign indicating number demoder sends reading command then, is transmitted to it by electronic control unit; Receive and resolve by demoder, know fault type thus.

This kind method shortcoming is following:

1, must guarantee that at first detecting instrument and electronic control unit line are normal; Because demoder is to carry out communication through diagnostic plug and electronic control unit, so this method can only just work under electronic control unit non-fault and the normal situation of communication line.Such as automobile over-emitting black exhaust fault, if communication line breaks off, then demoder can't reading of data, can't confirm abort situation; If communication line is normal, the entanglement of electronic control unit internal data, then the data that read of demoder not to or misdirection, mislead the maintenance personal on the contrary easily; If the stitch that electronic control unit is electrically connected with cooling-water temperature sensor is inner and its circuit disconnection at electronic control unit, this belongs to the fault of electronic control unit, but demoder can be pointed out the temperature sensor fault, causes so accurately confirming its abort situation.

2, often can only when electronic control unit is in proper working order, probably learn abort situation, but concrete inadequately, only provide a direction, the personnel that still need repairing further make a definite diagnosis by rule of thumb, like prompting air-conditioning system fault.And a lot of vehicles, because electronic control unit is not worked as yet fully, and data can't obtain, the fuel injection pulse signal during such as starting is wide or narrow also just can't to be detected in starting process.The maintenance personal still need directly be electrically connected pick-up unit and electronic unit and fetch detection and just can learn more accurate, concrete abort situation like this.

Prior art directly and electronic control unit and the peripheral electron parts detecting instrument that fetches detection that is electrically connected generally have two kinds:

1. sensor, actuator detecting instrument are used for the detection of sensor, actuator.To the sensor, the actuator that need to detect be broken off from primary circuit when its shortcoming is detection, detecting instrument inserted measure again;

2. the electronic control unit monitor station is used for the detected electrons control module.Need when its shortcoming is detection electronic control unit and peripheral electron parts are broken off, could detect with monitor station.

Above-mentioned two kinds of detecting instruments will detect electronic control unit and peripheral electron parts and can only detect one of which earlier, change again other instrument detecting its two; Perhaps same instrument has both measuring abilities simultaneously, also need change the plug insertion but surveyed one of which, or connect other port, or electronic unit is pulled down, and detects etc. again, promptly changes the electrical connection of detecting instrument and/or the electrical connection on former fare road.

The detecting instrument of prior art simulation electronic control module or peripheral electron parts generally also has two kinds:

1. sensor, actuator analog meter are used for the simulation of sensor, actuator.To the sensor on the car, actuator and electric-control system be broken off when its shortcoming is simulation, again detecting instrument inserted, simulate the parts that pull out with detecting instrument.

2. the electronic control unit analog meter is used for the electric signal that the sub-control module of analog electrical output sends, with actuate actuators etc.To the primary electron control module be broken off when its shortcoming is simulation, again detecting instrument inserted, simulate the electronic control unit that pulls out with detecting instrument.

Above-mentioned two kinds of analog meters will be simulated also electronic control unit and peripheral electron parts and can only be simulated one of which earlier, change again other instrument simulation its two; Perhaps same analog meter has both analog functuions simultaneously; But simulated certain some electronic unit and also need change the plug insertion; Or connect other port; Or electronic unit pulled down, simulate other electronic unit etc. again, promptly change the electrical connection of analog meter and/or the electrical connection on former fare road.

The detecting instrument of above-mentioned electric-control system or analog meter be both detected electrons control module peripheral electron parts under the situation of not changing electrical connection, again the detected electrons control module; Also be both simulation electronic control module peripheral electron parts, simulation electronic control module again.

In sum; Press for a kind of pick-up unit and detection method at present; Can be more fast, the abort situation when judging electric-controlled system fault more accurately, promptly more fast, judge it is electronic control unit peripheral electron unit failure more accurately, or the electronic control unit fault.If which electronic unit fault electronic control unit peripheral electron unit failure is again, reaches and reduce maintenance personal's labour intensity and the purpose of increasing work efficiency.

[summary of the invention]

The technical matters that the present invention will solve is to avoid the weak point of above-mentioned prior art and a kind of electric-control system pick-up unit and detection method is provided; In order to reduce manually-operated as far as possible; And can accomplish the simulation of electric parameter measurement, parts and the automatic analysis and judgment of electronic control unit, peripheral electron parts, and confirm the abort situation of electric-control system quickly and accurately, promptly confirm it is electronic control unit peripheral electron unit failure; Or electronic control unit fault; If which electronic unit fault electronic control unit peripheral electron unit failure is again, reaches and reduce maintenance personal's labour intensity and the purpose of increasing work efficiency.

The technical scheme that the present invention solve the technical problem employing is:

A kind of electric-control system pick-up unit is provided, in order to detect the working condition of electric-control system, comprises CPU module, human-computer interface module, supply with the power module and the interface module of each module WV; Said interface module comprises respectively electronic control unit electrical interface and two the suitable electrical interfaces of wire harness electrical interface with said electric-control system; Said CPU module breaks off said electronic control unit, connect or switches with being electrically connected of said electronic control unit peripheral electron parts through said interface module, and produces said electric-control system and carry out the signal of need of work and/or measure the signal by said electric-control system input; Said interface module is used for sending the signal that said CPU module produces to said electric-control system and/or signal that said electric-control system is produced sends said CPU module to; Said human-computer interface module comprises operation steps, operation selection and the testing result that is used to show or indicate said CPU module.

Said CPU module comprises microcontroller, on-off circuit, testing circuit and electronic unit mimic channel; Said microcontroller is electrically connected with said on-off circuit, testing circuit and electronic unit mimic channel respectively, and said on-off circuit also is electrically connected with said testing circuit and electronic unit mimic channel respectively; Said microcontroller and said on-off circuit carry out communication, and said electronic control unit are broken off, connect or switch with being electrically connected of said electronic control unit peripheral electron parts by the instruction of this microcontroller by said on-off circuit; Said testing circuit cooperates the changeable detection of said on-off circuit to need each electrical quantity of check point; Said electronic unit mimic channel is used to simulate said electronic control unit peripheral electron parts; Cooperate said on-off circuit that said electronic control unit peripheral electron parts are broken from primary circuit; Simulate these electronic control unit peripheral electron parts again and insert, thereby can simulate the partial function that said electronic control unit peripheral electron parts are perhaps simulated said electronic control unit.

The invention allows for a kind of electric-control system detection method; Originally the wire harness electrical interface 125 that was plugged on the electric-control system 100 that at first will have fault to check was together opened with the electronic control unit electrical interface in 115 minutes; Electrical interface 510,520 with the interface module 500 of the said electric-control system pick-up unit of claim 1 is connected with wire harness electrical interface 125 with the electronic control unit electrical interface 115 of the electric-control system that has fault to check 100 respectively again, then the abort situation of the said electric-control system 100 of preliminary judgement according to the following steps:

1. by the disconnection that is electrically connected of the on-off circuit 220 of said CPU module (200) with electronic control unit 110 with the electronic control unit peripheral electron parts 120 of said electric-control system; Each static electrical parameter when the testing circuit 250 of said CPU module 200 detects said electronic control unit 110 with electronic control unit peripheral electron parts 120 no powers respectively; Comprise resistance value and on state characteristic; Again relatively with each just often corresponding static electrical parameter value; Tentatively judged whether fault; This operation can detect the fault that comprises short circuit, opens circuit, punctures, is electrically connected loosening and blowout, if any then solving, does not then continue next step as having;

2. being electrically connected under the state that has broken off at the 1. said electronic control unit 110 of above step and electronic control unit peripheral electron parts 120; All electrical quantitys when the testing circuit 250 of said CPU module 200 detects power supply to said electronic control unit 110 and electronic control unit peripheral electron parts 120 respectively; Comprise magnitude of voltage and frequency, with each just often corresponding electrical parameter values relatively, further judged whether fault again; If any then solving, then do not continue next step as having;

3. by the connection that is electrically connected of the on-off circuit 220 of said CPU module (200) with electronic control unit 110 with the electronic control unit peripheral electron parts 120 of said electric-control system; The testing circuit 250 of said CPU module 200 detects has respectively supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120; But each electrical quantity the when delivery vehicle of equipping this electric-control system 100 does not start as yet; Comprise magnitude of voltage and frequency, with each just often corresponding electrical parameter values relatively, further judge whether to exist fault again; If any then solving, then do not continue next step as having;

4. 3. being electrically connected under the state of having connected of above step with said electronic control unit 110 and electronic control unit peripheral electron parts 120; The testing circuit 250 of said CPU module 200 detects has respectively supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120; And the delivery vehicle of equipping this electric-control system 100 has begun to start; Each electrical quantity when different running status; With each just often corresponding electrical parameter values relatively, further judge whether to exist fault, again if any then solving.

Compare with prior art, the beneficial effect of electric-control system pick-up unit of the present invention and detection method is:

Because with this pick-up unit one termination electronic control unit; One termination electronic control unit peripheral electron parts; This pick-up unit inserts the back and need not change under the situation that external electric connects, and comprises not dismantling electronic unit, not plug plug, do not change access way such as pick-up unit, also need not using supplementary instruments such as multimeter or oscillograph in addition.This pick-up unit not only can the detected electrons control module electrical quantity, electrical quantity that also can detected electrons control module peripheral electron parts; This pick-up unit not only can the simulation electronic control module electrical quantity, comprise signal, voltage, waveform etc., can also be linked in the electronic control unit by simulation electronic control module peripheral electron parts.

Use this pick-up unit and detection method can reduce manually-operated as far as possible; And electric parameter measurement, the parts that can accomplish electronic control unit, electronic control unit peripheral electron parts are simulated and automatic analysis and judgment; And confirm the abort situation of this electric-control system quickly and accurately; Promptly confirm it is the fault of electronic control unit peripheral electron parts, or the fault of electronic control unit, if the fault of electronic control unit peripheral electron parts; Be again the fault of which electronic unit, reach and reduce maintenance personal's labour intensity and the purpose of increasing work efficiency.

[description of drawings]

To be electric-control system pick-up unit of the present invention be connected " simplification " electric functional-block diagram with electric-control system 100 on the delivery vehicle to Fig. 1;

Fig. 2 is the electric functional-block diagram of said pick-up unit;

Fig. 3 is the front view that said pick-up unit specifically is applied in the electronic control unit electrical interface 115 of this automobile electric control system among the embodiment on the star automobile electric control system in Chang'an;

Fig. 4 is the front view of the electronic control unit peripheral electron parts 120 wire harness electrical interfaces 125 of automobile electric control system described in Fig. 3 embodiment;

Fig. 5 is the front view of the suitable electrical interface 510 of interface module 500 and said electronic control unit electrical interface 115 among Fig. 3 embodiment;

Fig. 6 is an interface module described in Fig. 5 embodiment 500 and the front view of the suitable electrical interface 520 of wire harness electrical interface described in Fig. 4 125;

Fig. 7 is the method flow diagram that said pick-up unit detects said electric-control system 100.

[embodiment]

Below in conjunction with each accompanying drawing the present invention is done further explain.

Referring to Fig. 1 and Fig. 2; The present invention relates to a kind of electric-control system pick-up unit; In order to detecting the working condition of said electric-control system 100, electric-control system 100 comprises electronic control unit 110, the electronic control unit electrical interface 115 that is electrically connected with electronic control unit 110, electronic control unit peripheral electron parts 120, the wire harness electrical interface 125 that is electrically connected with electronic control unit peripheral electron parts 120.Said electric-control system pick-up unit comprises CPU module 200, human-computer interface module 300, supplies with the power module 400 and the interface module 500 of each module WV; Said interface module 500 comprises respectively two electrical interfaces 510,520 suitable with the electronic control unit electrical interface 115 of said electric-control system 100 and wire harness electrical interface 125; Said CPU module 200 breaks off said electronic control unit 110, connect or switches with being electrically connected of said electronic control unit peripheral electron parts 120, and produces said electric-control system 100 and carry out the signal of need of work and/or measure the signal by said electric-control system 100 inputs; Said interface module 500 is used for sending the signal that said CPU module 200 produces to said electric-control system 100 and/or signal that said electric-control system 100 is produced sends said CPU module 200 to; Said human-computer interface module 300 comprises operation steps, operation selection and the testing result that is used to show or indicate said CPU module 200.

Referring to Fig. 2; Above-mentioned CPU module 200 comprises microcontroller 210, on-off circuit 220, testing circuit 250 and electronic unit mimic channel 260; Said microcontroller 210 is electrically connected with said on-off circuit 220, testing circuit 250 and electronic unit mimic channel 260 respectively, and said on-off circuit 220 also is electrically connected with electronic unit mimic channel 260 with said testing circuit 250 respectively;

Said microcontroller 210 carries out communication with said on-off circuit 220, and said electronic control unit 110 is broken off, connects or switch with being electrically connected of said electronic control unit peripheral electron parts 120 by the instruction of this microcontroller 210 by said on-off circuit 220; Said testing circuit 250 cooperates said on-off circuit 220 changeable detections to need each electrical quantity of check point, comprises resistance value, voltage, electric current, frequency and waveform; Said electronic unit mimic channel 260 is used to simulate said electronic control unit peripheral electron parts 120; Cooperate said on-off circuit 220 can said electronic control unit peripheral electron parts 120 be broken from primary circuit; Simulating these electronic control unit peripheral electron parts 120 again inserts; Comprise resistance, voltage and waveform; Comprise cooling-water temperature sensor, pressure transducer and crankshaft position sensor thereby can simulate in the said electronic control unit peripheral electron parts 120, also can simulate the partial function in the said electronic control unit 110, as send to the drive signal of ignition module.

Referring to Fig. 2, the model of above-mentioned microcontroller 210 is STM32F103; Said on-off circuit 220 comprises the integrated circuit of matrix switch and this matrix switch work of control; Said testing circuit 250 comprises the multimeter special IC of being with communication function, and by said microcontroller 210 control detection circuit 250 test items, these detection data are passed back to said microcontroller 210 by said testing circuit 250; Said electronic unit mimic channel 260 comprises potentiometer, like a kind of potentiometer of translator.

, model prestores the delivery vehicle that needs to detect such as electric-control system 100 each electrical quantity numerical value just often of automobile in being the internal storage of microcontroller 210 of STM32F103; Electronic control unit electrical interface 115 each stitch resistance to earth value during like static state, the magnitude of voltage dynamically the time, wire harness electrical interface 125 each stitch resistance to earth value when static, the magnitude of voltage dynamically time the etc.Greatly also can external memorizer if detect data volume.The data that this regime values can be obtained or gathered normal delivery vehicle such as automobile by open source information are like " up-to-date automobile electronic control unit terminal detects databook " of Liaoning science tech publishing house etc.

Referring to Fig. 2, above-mentioned CPU module 200 also comprises communicating circuit 230, and said communicating circuit 230 is electrically connected with on-off circuit 220 with said microcontroller 210 respectively; Said communicating circuit 230 obtains to comprise failure code, voltage data and the temperature data of said electronic control unit 110 through said on-off circuit 220 and electronic control unit 110 communications, and transmits fill order.Said communicating circuit 230 comprises CAN bus interface integrated circuit and protocol conversion integrated circuit;

Referring to Fig. 2; Above-mentioned CPU module 200 also comprises radio receiving transmitting module 240 or network transmission module (not marking among the figure); This radio receiving transmitting module 240 or network transmission module are electrically connected with said microcontroller 210; Can carry out data transmission or control with wireless mode with Other Instruments or equipment through this radio receiving transmitting module 240, or can carry out data transmission or control with the mode of network with Other Instruments or equipment through this network transmission module.

Above-mentioned human-computer interface module 300 is chromatic liquid crystal screen or the computers that have touch-screen.

Referring to Fig. 2 to Fig. 6, two electrical interfaces 510,520 of above-mentioned interface module 500 be respectively with female 510 of the suitable automobile interface of said electronic control unit 100 electrical interfaces and with public 520 of the suitable automobile electrical interface of said electronic control unit peripheral electron parts 120 wire harness electrical interfaces 125.

Above-mentioned CPU module 200, human-computer interface module 300, power module 400 and interface module 500 be unified to be integrated on the circuit board or to be installed in the same housing, reaches effect simple in structure, easy to use.

Above-mentioned power module 400 is batteries, supplies with each module WV by this battery; Perhaps, said power module 400 comprises a power interface and through the external power supply adaptor of this power interface, power supply adaptor be input as civil power, each module WV is supplied with in its output.

The invention still further relates to a kind of electric-control system detection method based on above-mentioned electric-control system pick-up unit; Originally the wire harness electrical interface 125 that was plugged on the electric-control system 100 that at first will have fault to check was together opened with the electronic control unit electrical interface in 115 minutes; Two electrical interfaces 510,520 with the interface module 500 of above-mentioned electric-control system pick-up unit are connected with wire harness electrical interface 125 with the electronic control unit electrical interface 115 of the electric-control system that has fault to check 100 respectively again, then the abort situation of the said electric-control system 100 of preliminary judgement according to the following steps:

1. by the disconnection that is electrically connected of the on-off circuit 220 of said CPU module 200 with electronic control unit 110 with the electronic control unit peripheral electron parts 120 of said electric-control system; Each static electrical parameter when the testing circuit 250 of said CPU module 200 detects said electronic control unit 110 with electronic control unit peripheral electron parts 120 no powers respectively; Comprise resistance value and on state characteristic; With each just often corresponding static electrical parameter value relatively, tentatively judged whether fault again, this operation can detect the fault that comprises short circuit, opens circuit, punctures, is electrically connected loosening and blowout; If any then solving, then do not continue next step as having;

3. by the on-off circuit 220 of said CPU module 200 with of the be electrically connected connection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; The testing circuit 250 of said CPU module 200 detects has respectively supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120; But each electrical quantity the when delivery vehicle that assembles this electric-control system 100 does not start as yet; Comprise electrical quantitys such as magnitude of voltage and frequency, with each just often corresponding electrical parameter values relatively, further judge whether to exist fault again; If any then solving, then do not continue next step as having; During such as the electric-control system 100 on the measured automobiles, connect ignition switch and make electronic control unit peripheral electron parts 120 feed power supply, each electrical quantity of this automobile electric control system 100 when automobile does not also start;

4. 3. being electrically connected under the state of having connected of above step with said electronic control unit 110 and electronic control unit peripheral electron parts 120; The testing circuit 250 of said CPU module 200 detects has respectively supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120; And the delivery vehicle of equipping this electric-control system 100 has begun to start; Each electrical quantity when different running status; Comprise electrical quantitys such as magnitude of voltage, frequency, like acceleration, the deceleration of automobile, the electrical quantity when colluding moving up and down of arm etc. like excavator; With each just often corresponding electrical parameter values relatively, further judge whether to exist fault, again if any then solving.

The order of above-mentioned each step is not arranged in order; But detecting successively by the order of above-mentioned each step is best detection method; And after detecting the fault of said electric-control system 100 when some steps,, can not carry out following detection if there is not other fault.

Through above step, can judge the abort situation of said electric-control system 100 parts, faults such as, blown fuse loosening, the output of sensor no signal such as short circuit between the wire harness of automobile, car plug.If can't judge, can be again according to the abort situation of following steps with the said electric-control system 100 of substitution method preliminary judgement:

5. by the on-off circuit 220 of said CPU module 200 with of the be electrically connected disconnection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; And by the said electronic control unit 110 of said electronic control unit peripheral electron parts 120 accesses of electronic unit mimic channel 260 simulations of said CPU module 200; Whether the said electronic control unit 110 of testing circuit 250 detections by said CPU module 200 has corresponding output signal to comprise the pulse width of fuel injection signal, ignition signal, idle signal and all signals again; And judge whether said electronic control unit 110 is normal; As said really electronic control unit 110 faults then solve, as not being then to continue next step;

6. by the on-off circuit 220 of said CPU module 200 with of the be electrically connected connection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; Break off a certain parts of said electronic control unit peripheral electron parts 120 and the CC of electronic control unit 110 one by one by said on-off circuit 220 again; The a certain parts of then simulating these electronic control unit peripheral electron parts 120 that are disconnected by said electronic unit mimic channel 260 insert primary circuit; If fault disappears, then can judge it is a certain parts damages of these electronic control unit peripheral electron parts 120 basically.With the resistor-type cooling-water temperature sensor disconnection of the above electric-control system 100 of automobile, insert primary circuit by resistance of said electronic unit mimic channel 260 simulations such as earlier again, if fault disappears, the resistor-type cooling-water temperature sensor damage of then breaking off; If fault still exists, then continue to break off the air flowmeter of the above electric-control system 100 of automobile, insert primary circuit by said electronic unit mimic channel 260 simulated air flowmeters again, like then this air flowmeter damage of fault disappearance, so analogize.Continue to break off one by one another parts of said electronic control unit peripheral electron parts 120 if fault is not removed, and insert, till finding abort situation by said electronic unit mimic channel 260 simulations;

The order of above-mentioned each step neither be arranged in order; But detecting successively by the order of above-mentioned each step is best detection method; And after detecting the fault of said electric-control system 100 when some steps,, can not carry out following detection if there is not other fault.

7. the electric signal by 110 outputs of said electronic unit mimic channel 260 simulation electronic control modules inserts actuator, according to replacing back and phenomenon just often relatively, can also judge whether this actuator damages.

In addition; Be typically provided with the communication terminal on the electronic control unit electrical interface 115 of said electric-control system 100; The DTC demoder is electrically connected read failure code, voltage data, current data etc. through wire harness electrical interface 125, electronic control unit electrical interface 115 etc. with the communication terminal.Can be by this principle; On the CPU module 200 of this electric-control system pick-up unit, communicating circuit 230 is set; In order to carry out communication with electronic control unit 110; Thereby obtain failure code, voltage data and the temperature data of said electronic control unit 110, and transmit fill order etc., this need not change the electrical connection of electric-control system 100 equally.Through failure code, voltage data and the temperature data that reads said electronic control unit 110; And the transmission fill order etc.; The testing circuit 250 and electronic unit mimic channel 260 that combine CPU module 200 again can be judged the abort situation of said electric-control system 100 more accurately, more rapidly.During detection, whether first trial inspection electronic control unit 110 has fault, and guarantees that its power supply is normal, carries out communication again, according to failure code that reads and/or data, dwindles sensing range, further detects again.The abort situation of the said electric-control system 100 of preliminary judgement according to the following steps:

1. A by the communicating circuit 230 of said CPU module 200 through said on-off circuit 220 and electronic control unit 110 communications; Acquisition comprises failure code, voltage data and the temperature data of said electronic control unit 110; And transmission fill order; And judge the abort situation that said electric-control system 100 is general in view of the above, the testing circuit 250 by said CPU module 200 detects and simulates according to the result with electronic unit mimic channel 260 again.

Referring to Fig. 1, Fig. 2 and Fig. 7; The invention still further relates to a kind of method that detects electric-control system based on above-mentioned electric-control system pick-up unit; Get at least two of above-mentioned electric-control system pick-up units; Be numbered A, B...; At first the wire harness electrical interface 125 that was plugged on originally on each electric-control system 100 was together opened with the electronic control unit electrical interface in 115 minutes; Again with the electrical interface 510,520 of at least one A number said electric-control system pick-up unit interface module 500 respectively with a normal electric-control system 100 in electronic control unit electrical interface 115 be connected with wire harness electrical interface 125, have the electronic control unit electrical interface 115 in the electric-control system 100 that fault need check to be connected with one respectively the electrical interface 510,520 of another B number said electric-control system pick-up unit interface module 500 at least with wire harness electrical interface 125; But the then abort situation of the said electric-control system 100 of preliminary judgement according to the following steps successively:

1. A number said electric-control system pick-up unit detects some projects or a plurality of project of normal electric-control system 100, and the detection data of this project or a plurality of projects are stored in the CPU module 200 of A number said electric-control system pick-up unit; Greatly also can external memorizer if detect data volume;

2. the CPU module 200 of A number said electric-control system pick-up unit sends instruction; By the radio receiving transmitting module 240 or the network transmission module communication of its radio receiving transmitting module 240 or network transmission module and B number said electric-control system pick-up unit, require B number said electric-control system pick-up unit also to detect this project or a plurality of project of fault electric-control system 100;

3. B number said electric-control system pick-up unit received this instruction by radio receiving transmitting module 240 or network transmission module; And by its this instruction of CPU module 200 parsings; Learn it is to detect which corresponding project; B number said electric-control system pick-up unit detects this corresponding project or a plurality of project then, and the project that this is corresponding or the detection data of a plurality of projects are stored in the CPU module 200 of B number said electric-control system pick-up unit;

4. the CPU module 200 of B number said electric-control system pick-up unit sends and detects the instruction of accomplishing; By radio receiving transmitting module 240 or the network transmission module communication of its radio receiving transmitting module 240 or network transmission module to A number said electric-control system pick-up unit; After A number said electric-control system pick-up unit receives this signal; Send instruction, require B number said electric-control system pick-up unit to transmit it and detect data to A number said electric-control system pick-up unit;

5. after the detection data that B number said electric-control system pick-up unit of A number said electric-control system pick-up unit reception passed back, also should detect data and be stored in its CPU module 200;

6. A number said electric-control system pick-up unit detects data to two or many and compare, and be undesired like this project or certain some project, terminating operation then, and show by said human-computer interface module 300; As normally, proceed the detection of other project, 6. 1. repeating step arrive, till finding abort situation.

In the above operating process, can add manual control, carry out step by step by operating personnel.

The concrete embodiment that uses of electric-control system pick-up unit of the present invention:

Describe with the electric-control system that detects automobile below, vehicle is the automobile of the star in Chang'an, and the electronic control unit of the engine that this automobile adopts is produced by German BOSCH company, is numbered 0261207185.Referring to Fig. 3, this engine electronic control unit 110 is provided with 1 to the 55 electronic control unit electrical interface 115 of totally 55 terminals; Referring to Fig. 4,125 of the wire harness electrical interfaces of suitable with it electronic control unit peripheral electron parts 120 are provided with 1 to 55 totally 55 pin holes, can directly insert between them.Electronic control unit peripheral electron parts 120 are electrically connected with wire harness electrical interface 125 through automotive wire bundle (not marking); Be directly to be fastened on the electronic control unit electrical interface 115 at this wire harness electrical interface 125 on the automobile at ordinary times, so electronic control unit peripheral electron parts 120 are electrically connected with electronic control unit 110 through automotive wire bundle, wire harness electrical interface 125 and electronic control unit electrical interface 115.

Referring to Fig. 5 and Fig. 6; Two electrical interfaces of the interface module 500 of the used electric-control system pick-up unit of this automobile are female 510 of automobile interfaces and public 520 of automobile electrical interface; Promptly an end adopt with this electronic control unit electrical interface 115 suitable 1 to 55 female 510, one ends of automobile electrical interface of totally 55 pin holes adopt 1 to the 55 automobile electrical interface public 520 of totally 55 pin holes suitable with wire harness electrical interface 125.Female 510 of automobile interface and public 520 of automobile electrical interface are inserted electronic control unit electrical interface 115 and wire harness electrical interface 125 respectively, make electric-control system pick-up unit of the present invention be electrically connected with the electronic control unit 110 and/or the electronic control unit peripheral electron parts 120 of this automobile electric control system.

The CPU module 200 of the used electric-control system pick-up unit of this automobile set inside comprises that model is microcontroller 210, on-off circuit 220, communicating circuit 230, radio receiving transmitting module 240 or network transmission module, testing circuit 250 and the electronic unit mimic channel 260 of STM32F103.Wherein testing circuit 250 comprises the multimeter special IC (not marking) of being with communication function; This multimeter special IC can detect resistance, voltage, frequency, diode characteristic etc.; By microcontroller 210 its work of control; The static state of the project that can select to test and detected electrons control module 110 and electronic control unit peripheral electron parts 120 and dynamic each electrical quantity detect the result who obtains and are sent in the microcontroller 210 through it.On-off circuit 220 comprises the integrated circuit (not marking) of matrix switch (not marking) and this matrix switch work of control; On-off circuit 220 is controlled its work on demand by microcontroller 210, can break off, connects or switch being electrically connected of electronic control unit 110 and electronic control unit peripheral electron parts 120.Electronic unit mimic channel 260 comprises the potentiometer (not marking) of translator; To suspect when on-off circuit 220 the electronic control unit peripheral electron parts 120 that damage and electronic control unit 110 be electrically connected disconnection after; Electronic unit mimic channel 260 these electronic control unit peripheral electron parts 120 of simulation also produce in the simulating signal access electronic control unit 110, thereby judge according to the substitution method principle whether these electronic control unit peripheral electron parts 120 damage; Electronic unit mimic channel 260 is produced by microcontroller 210 and comprises actuator driven signal, sensor signal, transformable voltage etc.; The simulation of the resistor-type electronic control unit peripheral electron parts 120 on the automobile electric control system adopts the potentiometer of microprocessor 210 control translators to realize; Then resistance is also different when motor corner difference for the potentiometer of this translator; Thereby can realize automatic control, simulate the resistor-type electronic control unit peripheral electron parts 120 under the different operating modes then.Communicating circuit 230 comprises CAN bus interface integrated circuit (not marking) and protocol conversion integrated circuit (not marking); Can realize the function of DTC demoder; Under electronic control unit 110 normal situation; Through reading failure code and/or each data in the electronic control unit 110; Learn the fault probable ranges of this automobile electric control system, cooperate again testing circuit 250 and electronic unit mimic channel 260 through detect each electrical quantity, the replacement of simulation electronic parts further obtains location of fault.Radio receiving transmitting module 240 can carry out data transmission or control with wireless mode with Other Instruments or equipment, or can carry out data transmission or control with the mode of network with Other Instruments or equipment through this network transmission module.

The human-computer interface module 300 of the used electric-control system pick-up unit of this automobile set inside is chromatic liquid crystal screen or the computer that has touch-screen, is used to show or indicate operation steps, operation selection and the testing result etc. of said CPU module 200; Touch-screen can be directly touch with hand import, function selecting etc.

The output of the power module 400 of the used electric-control system pick-up unit of this automobile is the DC voltage of 12V, like the battery of 12V, supplies with each module WV by this battery; Perhaps, said power module 400 comprises a power interface and through the external power supply adaptor of this power interface, power supply adaptor be input as civil power, its output is that the DC voltage of 12V is supplied with each module WV; Or when automobile storage battery and wire harness are normal when working with automobile, said power module 400 can directly replace with automobile storage battery.

, model prestores this automobile electrical quantity numerical value just often in being the internal storage of microcontroller 210 of STM32F103; Electronic control unit electrical interface 115 each stitch resistance to earth value during like static state, the magnitude of voltage dynamically the time, wire harness electrical interface 125 each stitch resistance to earth value when static, the magnitude of voltage dynamically time the etc.If data volume greatly also can external memorizer.This numerical value can be obtained or gathered the data of normal this automobile by open source information, like " up-to-date automobile electronic control unit terminal detects databook " of Liaoning science tech publishing house.

During detection; Earlier the wire harness electrical interface 125 that was plugged on originally on this automobile was together opened with the electronic control unit electrical interface in 115 minutes, more female 510 of two electrical interface automobile interface of the interface module 500 of the used electric-control system pick-up unit of this automobile and public 520 of automobile electrical interface are inserted respectively on electronic control unit electrical interface 115 and the wire harness electrical interface 125.

In the present embodiment, the used electric-control system pick-up unit of this automobile has the artificial selection test and tests two kinds of functions automatically.Artificial selection test is meant that the project that the autonomous selection of operating personnel will be tested detects, simulation, communication etc.Automatically test is that manual steps with standard is set in the central processing module 200, is automatically performed by this pick-up unit, searches abort situation automatically.Below explain that with automatic test the difference of artificial selection test is to comprise that operation steps can select.Give this pick-up unit power supply, select automatic test through the touch-screen of human-computer interface module 300.

Can pass through following steps, each electrical quantity of this automobile electric control system 100 of Preliminary detection, thus judge the place that it breaks down.

One, detect static state and dynamic electrical parameter:

Step 1, by this pick-up unit with the be electrically connected disconnection of electronic control unit 110 with electronic control unit peripheral electron parts 120; Each static electrical parameter when difference detected electrons control module 110, electronic control unit peripheral electron parts 120 no powers; Comprise resistance value, on state characteristic etc.; With just often numeric ratio, tentatively judged whether fault again, this operation can detect comprise short circuit, open circuit, faults such as puncture, electrical interface are loosening, blowout.If any then solving, then do not continue next step as having.Specifically describe as follows:

(1) breaks off by the on-off circuit 220 of said CPU module 200 circuit two electrical interfaces 510 of interface module 500,55 stitch being provided with between 520; The electrical connection that is about to electronic control unit 110 and electronic control unit peripheral electron parts 120 is broken off, and whether cooperate on-off circuit 220 to detect this automobile supply voltage earlier by testing circuit 250 then normal.In the present embodiment, the positive pole of this automobile storage battery is electrically connected with No. 37 stitch of wire harness electrical interface 125, is promptly detected the magnitude of voltage of these No. 37 stitch by testing circuit 250, judges whether it has fault, if any then solving earlier.Cooperate the on-off circuits 220 resistance to earth value of detected electrons control module electrical interface 115 each stitch and wire harness electrical interface 125 other each stitch except that No. 37 stitch one by one by testing circuit 250 again; The result is sent to microcontroller 210; By normal numeric ratio in this microcontroller 210 and the storer in it; If undesired, alert is handled in advance.This can check out and comprise shorted to earth, fault such as loose contact over the ground; Such as the power protection diode breakdown in electronic control unit 110 internal circuits; To cause its No. 37 stitch and the short circuit of No. 19 ground wire stitch, the resistance of No. 37 stitch was 0 or was close to 0 this moment.Cause shorted to earth if also causing easily connect that electric wire in the wire harness of electronic control unit peripheral electron parts 120 and wire harness electrical interface 125 is aging, corrosion etc. links to each other with this automobile iron-clad; And sensor, actuator puncture etc. also can cause shorted to earth; Connector lures erosion can cause resistance to earth increase etc.

(2) on state characteristic of testing circuit 250 detected electrons control modules 110 and electronic control unit peripheral electron parts 120 each specific stitch; In 55 stitch such as this electronic control unit electrical interface 115; The ground wire that a plurality of sensors or power unit are arranged is commonly referred to as the bonding end on the automobile, promptly comprise a plurality of ground wire stitch; Like 2, No. 19 stitch etc.; They directly are electrically connected in electronic control unit 110, if testing circuit 250 detects not conducting between them, then proof has loose contact or electronic control unit 110 internal circuits that the fault of open circuit is arranged.Because the earth point in this automotive wire bundle is not necessarily identical; Such as No. 41 stitch in the wire harness electrical interface 125 through wire harness at cylinder body starter place bonding; 19,2,14, No. 24 stitch can also specifically know it is that which position contact is bad through wire harness bonding under accumulator so detect in view of the above.Again such as; No. 37 stitch of the positive termination of electronic control unit 110 internal protection diodes, negativing ending grounding, promptly negative terminal connects 2, No. 19 stitch etc.; Because the characteristic of diode is not conducting of forward; Reverse-conducting, so testing circuit 250 detects the diode characteristic of No. 37 stitch and ground wire stitch in view of the above, can learn whether electronic control unit 110 protection diodes are normal.For other vehicles, some sensor is the device with diode characteristic, also can detect in view of the above and tentatively learn its quality.

(3) resistance value to power end of testing circuit 250 detected electrons control module electrical interfaces, 115 each stitch and wire harness electrical interface 125 each stitch, this can detect electronic control unit 110 or whether electronic control unit peripheral electron parts 120 have faults such as direct power.

(4) resistance value of testing circuit 250 detected electrons control module peripheral electron parts 120 with just often numeric ratio, can tentatively be confirmed its quality again; Receive 12,30, No. 53 stitch of wire harness electrical interface 125 respectively through wire harness like three connection terminals of TPS; Just often, the resistance value between No. 12 stitch and No. 53 stitch should be about 1.95 ohm, and air throttle is by full cut-off during to standard-sized sheet; Resistance is 1.1～280 kilo-ohms of variations between No. 30 stitch and No. 53 stitch; In view of the above, testing circuit 250 detects the resistance value between above-mentioned each stitch of wire harness electrical interfaces 125, can tentatively judge the quality of TPS.

Step 2, by the on-off circuit 220 of said CPU module 200 with of the be electrically connected disconnection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; Testing circuit 250 detects each electrical quantity when having supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120 respectively; Comprise electrical quantitys such as magnitude of voltage and frequency, follow electrical parameter values just often to compare again, further judged whether fault; If any then solving, then do not continue next step as having.Such as by the be electrically connected connection of on-off circuit 220 with 2, No. 37 stitch in 2, No. 37 stitch in the wire harness electrical interface 125 and the electronic control unit electrical interface 115; Other each stitch then breaks off; Insert power supply just for electronic control unit 110; Measure the voltage of each terminal, with each just often corresponding numeric ratio, tentatively judged whether fault.

Step 3, by the on-off circuit 220 of said CPU module 200 with of the be electrically connected connection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; Testing circuit 250 detects has respectively supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120; But the electrical quantity when having the automobile unstart of this electric-control system 100; Comprise electrical quantitys such as magnitude of voltage and frequency, with each just often corresponding electrical parameter values relatively, further judge whether to exist fault again; If any then solving, then do not continue next step as having.During such as the electric-control system 100 on the measured automobiles, connect ignition switch and make electronic control unit peripheral electron parts 120 feed power supply, the electrical quantity of this automobile electric control system 100 when automobile does not also start.On-off circuit 220 is all connected 500 liang of electrical interfaces 510 of interface module, 55 stitch circuits between 520 for another example; Make electronic control unit 110 be electrically connected through these 55 stitch circuits with electronic control unit peripheral components 120; Do not start up the car this moment; Cooperate on-off circuit 220 to detect the electrical quantity of each bar circuit by testing circuit 250, each electrical quantity corresponding with normal value relatively tentatively judged whether fault.

Step 4, by the on-off circuit 220 of said CPU module 200 with of the be electrically connected connection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; Testing circuit 250 detects has respectively supplied power to said electronic control unit 110 and electronic control unit peripheral electron parts 120; Automobile with this electric-control system 100 has begun to start; Each electrical quantity when different running status; Comprise electrical quantitys such as magnitude of voltage, frequency, the electrical quantity during like the acceleration of this automobile, deceleration etc.; With each just often corresponding electrical parameter values relatively, further judge whether to exist fault, again if any then solving.Such as on-off circuit 220 500 liang of electrical interfaces 510 of interface module, 55 stitch circuits between 520 are all connected; Make electronic control unit 110 be electrically connected through these 55 stitch circuits with electronic control unit peripheral components 120; Start up the car and make it work in idling, acceleration, deceleration regime respectively; Detect the electrical quantity of each bar circuit respectively by testing circuit 250, each electrical quantity corresponding with normal value relatively tentatively judged whether fault.

Two, press each electronic unit of substitution method principle simulation:

Through above step, can judge the abort situation of said electric-control system 100 parts of this automobile, faults such as, blown fuse loosening, the output of sensor no signal such as short circuit between the wire harness of this automobile, car plug.If can't judge, can use the abort situation of the said electric-control system 100 of replacement ratio juris this automobile of preliminary judgement again according to following steps:

Step 1, by the on-off circuit 220 of said CPU module 200 with of the be electrically connected disconnection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; And by the said electronic control unit 110 of said electronic control unit peripheral electron parts 120 accesses of electronic unit mimic channel 260 simulations of said CPU module 200; Whether the said electronic control unit 110 of testing circuit 250 detections by said CPU module 200 has corresponding output signal to comprise the pulse width of fuel injection signal, ignition signal, idle signal and all signals again; And judge whether said electronic control unit 110 is normal; As said really electronic control unit 110 faults then solve, as not being then to continue next step.Such as on-off circuit 220 55 stitch circuits between public 520 of female 510 of the automobile interface of interface module 500, automobile electrical interface are all broken off; Electronic unit mimic channel 260 is female 510 positive source of 18,27, No. 37 stitch of electronic control unit electrical interface 115 being received this pick-up unit of the automobile interface through interface module 500 again; Present embodiment is+DC voltage of 12V; No. 2 stitch are connect power cathode; And then the square-wave signal that the crankshaft position sensor of being simulated by electronic unit mimic channel 260 sends inserts No. 49 stitch; By testing circuit 250 detected electrons control modules 110 comprise whether No. 3 stitch of BOR Bunker of Redelivery pump have signal, whether 17,16,34, No. 35 stitch connecing atomizer have No. 1 stitch of signal and contact fire coil whether signal is arranged; And pulse width of signal, amplitude etc., judge tentatively whether this electronic control unit 110 has fault.

Can simulate more sensor in addition and insert, can further diagnose.As simulate cooling-water temperature transmitter and insert 45, No. 30 stitch with female 510 of adaptive interface module 500 automobile interface of electronic control unit electrical interface 115.The simulation control of said cooling-water temperature transmitter is realized by the potentiometer of translator in the said electronic unit mimic channel 260; Potentiometer taper one termination of translator is gone into No. 45 stitch, No. 30 stitch of a termination of female 510 of this automobile interface, when motor rotates, the resistance change of potentiometer; Make the resistance change of said 45, No. 30 stitch; The resistance value of potentiometer is measured by testing circuit 250, is adjusted in view of the above by microcontroller 210, and the resistance that makes access is in normal range; And can in normal range, adjust, thereby simulate the temperature under the various operating modes.Pulse width such as oil spout ignition signal under the different coolant temperatures is different; So, can further diagnose this cooling-water temperature transmitter whether fault is arranged with normal value corresponding comparison by oil spout, the firing pulse width that testing circuit 250 detects under the different analog temperatures.

Step 2, by the on-off circuit 220 of said CPU module 200 with of the be electrically connected connection of said electronic control unit 110 with electronic control unit peripheral electron parts 120; Break off a certain parts of said electronic control unit peripheral electron parts 120 and the CC of electronic control unit 110 one by one by said on-off circuit 220 again; The a certain parts of then simulating these electronic control unit peripheral electron parts 120 that are disconnected by said electronic unit mimic channel 260 insert primary circuit; If fault disappears, then can judge it is a certain parts damages of these electronic control unit peripheral electron parts 120 basically.With the resistor-type cooling-water temperature sensor disconnection of the above electric-control system 100 of automobile, insert primary circuit by resistance of said electronic unit mimic channel 260 simulations such as earlier again, if fault disappears, the resistor-type cooling-water temperature sensor damage of then breaking off; If fault still exists, then continue to break off the air flowmeter of the above electric-control system 100 of automobile, insert primary circuit by said electronic unit mimic channel 260 simulated air flowmeters again, like then this air flowmeter damage of fault disappearance, so analogize.By on-off circuit 220 cooling-water temperature transmitter is opened from circuit interruption for another example; Promptly break off through public 520 No. 45 stitch of the automobile electrical interface of interface module 500 wire harness electrical interface 125 by on-off circuit 220; Simulate control cooling-water temperature transmitter female 510 45, No. 30 stitch that are linked into electronic control unit electrical interface 115 of automobile interface by the potentiometer of translator in the electronic unit mimic channel 260 through interface module 500; If fault disappears, then prove its damage; Otherwise cooling-water temperature transmitter is taken back in the circuit by on-off circuit 220; Also promptly connect through public 520 No. 45 stitch of the automobile electrical interface of interface module 500 wire harness electrical interface 125 by on-off circuit 220; Again another electronic unit is opened from circuit interruption; By in electronic unit mimic channel 260 its places in circuit of simulation,, then prove its damage again if fault disappears; Otherwise continue replacement, if promptly fault is not removed then is continued to break off one by one another parts of said electronic control unit peripheral electron parts 120, and by said electronic unit mimic channel 260 simulation accesses, till finding abort situation.

Step 3, the electric signal of being exported by said electronic unit mimic channel 260 simulation electronic control modules 110 insert actuator, compare according to replacement back and phenomenon just often, can also judge whether this actuator damages.

Three, read failure code, data etc., further detect this automobile electric control system 100:

Be typically provided with the communication terminal on the electronic control unit electrical interface 115 of said electric-control system 100; The DTC demoder is electrically connected read failure code, voltage data, current data etc. through wire harness electrical interface 125, electronic control unit electrical interface 115 etc. with the communication terminal.Can be by this principle; On the CPU module 200 of this electric-control system pick-up unit, communicating circuit 230 is set; In order to carry out communication with electronic control unit 110; Thereby obtain failure code, voltage data and the temperature data of said electronic control unit 110, and transmit fill order etc., this need not change the electrical connection of electric-control system 100 equally.Through failure code, voltage data and the temperature data that reads said electronic control unit 110; And the transmission fill order etc.; The testing circuit 250 and electronic unit mimic channel 260 that combine CPU module 200 again can be judged the abort situation of said electric-control system 100 more accurately, more rapidly.During detection, whether first trial inspection electronic control unit 110 has fault, and guarantees that its power supply is normal, carries out communication again, according to failure code that reads and/or data, dwindles sensing range, further detects again.No. 55 stitch such as this electronic control unit electrical interface 115 are diagnostic signal stitch; Female 510 of communicating circuit 230 automobile interface through interface module 500 is electrically connected with No. 55 stitch of electronic control unit electrical interface 115; Press communications protocol read failure code, data stream by microcontroller 210; And resolve fault code implication, analyze the Position Approximate that data stream etc. is learnt fault, and again by the method for aforesaid detection with simulation, further definite its abort situation.

In addition; Electronic control unit 110 often has the element test function; Through with its communication, send test instruction, send drive signal by electronic control unit 110 and give electronic control unit peripheral electron parts 120; Whether produce corresponding actions by operating personnel's detected electrons control module peripheral electron parts 120 again, thereby judge that it denys to damage that electronic control unit peripheral electron parts 120 are not carried.Be electrically connected with No. 55 stitch of electronic control unit electrical interface 115 such as female 510 of communicating circuit 230 automobile interface through interface module 500; Send Instruction Selection element test function by microcontroller 210; Cooperate on-off circuit 220 to detect the electronic unit of surveying by testing circuit 250 again and whether move, and then learn whether the electronic unit of surveying damages.

In the said electric-control system 100 of this specific embodiment; No. 37 stitch of wire harness electrical interface 125 are connected with the positive electrical of automobile storage battery; When automobile storage battery and wire harness are normal when working with automobile; The present invention does not need external power source to supply with, and its power module 400 can directly replace with the accumulator on the automobile, and this should be regarded as not influencing protection scope of the present invention.Because this moment, if automobile do not have power supply or supply voltage low WV then the pick-up unit of this pick-up unit do not work, operating personnel can judge in view of the above that the automobile power supply has fault; If supply voltage can make this pick-up unit work; Then can compare by the testing circuit 250 measurement supply voltages of this pick-up unit and with regime values; Diagnostic result and/or voltage value are shown in the LCDs of human-computer interface module 300; Whether operating personnel can judge in view of the above also whether power supply is normal, normal etc. such as magnitude of voltage.

The CPU module 200 of the used electric-control system pick-up unit of this automobile also comprises radio receiving transmitting module 240 or network transmission module; This radio receiving transmitting module 240 or network transmission module are electrically connected with said microcontroller 210; Can carry out data transmission or control with wireless mode with Other Instruments or equipment through this radio receiving transmitting module 240, or can carry out data transmission or control with the mode of network with Other Instruments or equipment through this network transmission module.

Under the normal condition; The normal value of the various electrical quantitys of the electronic unit of electric-control system is obtained by open source information or measurement usually, but because each transport facility such as car replacement speed are fast, the electric-control system on it is also being brought in constant renewal in; Or other reason is under the situation that can't obtain its normal electrical parameter; Can look for normal traffic means of transport such as automobile that identical electric-control system is housed to do standard, cooperate the used electric-control system pick-up unit of a plurality of these automobiles Combination application, existing is that example describes with two.

Get two of the used electric-control system pick-up units of this automobile; Be numbered A, B; At first the wire harness electrical interface 125 that was plugged on originally on each electric-control system 100 was together opened with the electronic control unit electrical interface in 115 minutes; Again A number said electric-control system pick-up unit interface module 500 electrical interfaces 510,520 are connected with electronic control unit peripheral electron parts 120 wire harness electrical interfaces 125 with the electronic control unit electrical interface 115 of a normal electric-control system 100 respectively, have the electronic control unit electrical interface 115 of the electric-control system 100 that fault need check to be connected with one respectively another B number said electric-control system pick-up unit interface module 500 electrical interface 510,520 with electronic control unit peripheral electron parts 120 wire harness electrical interfaces 125; But the then abort situation of the said electric-control system 100 of preliminary judgement according to the following steps successively:

1. A number said electric-control system pick-up unit detects some projects of normal electric-control system 100; Such as the voltage of No. 37 stitch that detect wire harness electrical interface 125, in the CPU module 200 that the testing result or the detected value of this project is stored in A number said electric-control system pick-up unit;

2. the CPU module 200 of A number said electric-control system pick-up unit sends instruction; Radio receiving transmitting module 240 or network transmission module communication by its radio receiving transmitting module 240 or network transmission module and B number said electric-control system pick-up unit; Require B number said electric-control system pick-up unit also to detect this project of fault electric-control system 100, such as the voltage of No. 37 stitch that also detect wire harness electrical interface 125;

3. B number said electric-control system pick-up unit received this instruction by radio receiving transmitting module 240 or network transmission module; And by its this instruction of CPU module 200 parsings; Learn it is to detect which corresponding project; B number said electric-control system pick-up unit detects this corresponding project then, and the detection data of the project that this is corresponding are stored in the CPU module 200 of B number said electric-control system pick-up unit;

6. A number said electric-control system pick-up unit detects data to two and compare, and be undesired like this project, terminating operation then, and show by said human-computer interface module 300; As normally, proceed the detection of other project, 6. 1. repeating step arrive, till finding abort situation.

In the above operating process; Can detect a plurality of projects once by A number said electric-control system pick-up unit; Instruct B number said electric-control system pick-up unit once a plurality of projects to be detected again; Treat to transmit the detection data again after a plurality of projects detect completion, compare, and judge it is that which project is undesired.In the above operating process, can add manual control, carry out step by step by operating personnel.

It more than is the specific embodiment that electric-control system pick-up unit of the present invention detects said automobile electric control system; More than detecting step is a selection in numerous steps; Be not limited to said detection step, only change detects step and should be regarded as protection scope of the present invention equally a little.

It is the electrical interface suitable with electronic control unit electrical interface 115 and wire harness electrical interface 125 that the interface module 500 of electric-control system pick-up unit of the present invention does not limit; It also can be other electrical interface; Form by row's pin of two 40 pin such as interface module 500, dispose various electrical interfaces in addition again, with the electrical interface of configuration with after electronic control unit electrical interface 115 is connected; In the row's of insertion pin, realize that finally electric-control system is electrically connected with this pick-up unit again.Because vehicle is numerous, electronic control unit electrical interface 115 is not necessarily identical with wire harness electrical interface 125, disposes different electrical interfaces and can adapt to different vehicles, and promptly this pick-up unit can be changed interface module 500, and this should be regarded as protection scope of the present invention.

Electric-control system pick-up unit of the present invention and detection method not only can be used for the electric-control system of motor car engine, can also be used for the electric-control system on the transport facilitys such as electric motor car, aircraft, boats and ships, engineering machinery, power vehicle and railcar; For other electric-control system, only need to select corresponding interface module 500 and the parameter of adjusting in the CPU module 200 to get final product, can select corresponding plug, contact pin, test probe etc. like interface module 500.CPU module 200, human-computer interface module 300, power module 400 and interface module 500 be unified be integrated on the circuit board or directly with objects such as plastic cement with all module package in one, reach effect simple in structure, easy to use.

The above embodiment has only expressed preferred implementation of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention; Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention; Therefore, all equivalents and modifications of being done with claim scope of the present invention all should belong to the covering scope of claim of the present invention.

Claims

1. an electric-control system pick-up unit in order to detect the working condition of electric-control system (100), comprises power module (400), it is characterized in that:

Also comprise CPU module (200), human-computer interface module (300) and interface module (500), said power module (400) is supplied with each module WV; Said interface module (500) comprises respectively electronic control unit electrical interface (115) and the suitable electrical interface (510,520) of wire harness electrical interface (125) with said electric-control system (100); Said CPU module (200) breaks off said electronic control unit (110), connect or switches with being electrically connected of said electronic control unit peripheral electron parts (120) through said interface module (500), and produces said electric-control system (100) and carry out the signal of need of work and/or measure the signal by said electric-control system (100) input; Said interface module (500) is used for sending the signal that said CPU module (200) produces to said electric-control system (100) and/or signal that said electric-control system (100) is produced sends said CPU module (200) to; Said human-computer interface module (300) comprises operation steps, operation selection and the testing result that is used for showing or indicating said CPU module (200);

Said CPU module (200) comprises microcontroller (210), on-off circuit (220), testing circuit (250) and electronic unit mimic channel (260); Said microcontroller (210) is electrically connected with said on-off circuit (220), testing circuit (250) and electronic unit mimic channel (260) respectively, and said on-off circuit (220) also is electrically connected with said testing circuit (250) and electronic unit mimic channel (260) respectively;

Said microcontroller (210) carries out communication with said on-off circuit (220), and said electronic control unit (110) is broken off, connects or switch with being electrically connected of said electronic control unit peripheral electron parts (120) by the instruction of this microcontroller (210) by said on-off circuit (220); Said testing circuit (250) cooperates the changeable detection of said on-off circuit (220) to need each electrical quantity of check point; Said electronic unit mimic channel (260) is used to simulate said electronic control unit peripheral electron parts (120); Cooperate said on-off circuit (220) that said electronic control unit peripheral electron parts (120) are broken from primary circuit; Simulate these electronic control unit peripheral electron parts (120) again and insert, thereby can simulate the partial function that said electronic control unit peripheral electron parts (120) are perhaps simulated said electronic control unit (110).

2. electric-control system pick-up unit according to claim 1 is characterized in that:

The model of said microcontroller (210) is STM32F103; Said on-off circuit (220) comprises the integrated circuit of matrix switch and this matrix switch work of control; Said testing circuit (250) comprises the multimeter special IC of being with communication function, and by said microcontroller (210) control detection circuit (250) test item, this testing result is passed back to said microcontroller (210) by said testing circuit (250); Said electronic unit mimic channel (260) comprises potentiometer.

3. electric-control system pick-up unit according to claim 1 is characterized in that:

Said CPU module (200) also comprises communicating circuit (230), and said communicating circuit (230) is electrically connected with said microcontroller (210) and on-off circuit (220) respectively; Said communicating circuit (230) obtains failure code, voltage data and the temperature data of said electronic control unit (110) through said on-off circuit (220) and electronic control unit (110) communication, and transmits fill order.

4. electric-control system pick-up unit according to claim 1 is characterized in that:

Said CPU module (200) also comprises radio receiving transmitting module (240) or network transmission module; This radio receiving transmitting module (240) or network transmission module are electrically connected with said microcontroller (210); Can carry out data transmission or control with wireless mode with Other Instruments or equipment through this radio receiving transmitting module (240), or can carry out data transmission or control with the mode of network with Other Instruments or equipment through this network transmission module.

5. according to each described electric-control system pick-up unit of claim 1～4, it is characterized in that:

Said CPU module (200), human-computer interface module (300), power module (400) and interface module (500) unification are integrated on the circuit board or are installed in the same housing.

6. electric-control system detection method based on the said electric-control system pick-up unit of claim 1; It is characterized in that: the wire harness electrical interface (125) and the electronic control unit electrical interface (115) that were plugged on originally on the electric-control system (100) that at first will have fault to check together separate; Electrical interface (510,520) with the interface module (500) of the said electric-control system pick-up unit of claim 1 is connected with wire harness electrical interface (125) with the electronic control unit electrical interface (115) of the electric-control system that has fault to check (100) respectively again; Then abide by following each step; But needn't abide by successively, but the abort situation of the said electric-control system of preliminary judgement (100):

1. by the disconnection that is electrically connected of the on-off circuit (220) of said CPU module (200) with electronic control unit (110) with the electronic control unit peripheral electron parts (120) of said electric-control system; Each static electrical parameter when the testing circuit (250) of said CPU module (200) detects said electronic control unit (110) and electronic control unit peripheral electron parts (120) no power respectively; Again relatively with each just often corresponding static electrical parameter value; Tentatively judged whether fault; If any then solving, then do not continue next step as having;

2. being electrically connected under the state that has broken off at the 1. said electronic control unit of above step (110) and electronic control unit peripheral electron parts (120); All electrical quantitys when the testing circuit (250) of said CPU module (200) detects power supply to said electronic control unit (110) and electronic control unit peripheral electron parts (120) respectively; Again relatively with each just often corresponding electrical parameter values; Further judged whether fault,, then do not continued next step as having if any then solving;

3. by the connection that is electrically connected of the on-off circuit (220) of said CPU module (200) with electronic control unit (110) with the electronic control unit peripheral electron parts (120) of said electric-control system; The testing circuit (250) of said CPU module (200) detects has respectively supplied power to said electronic control unit (110) and electronic control unit peripheral electron parts (120); But each electrical quantity the when delivery vehicle of equipping this electric-control system (100) does not start as yet; Again relatively with each just often corresponding electrical parameter values; Further judge whether to exist fault,, then do not continue next step as having if any then solving;

4. 3. being electrically connected under the state of having connected of above step with said electronic control unit (110) and electronic control unit peripheral electron parts (120); The testing circuit (250) of said CPU module (200) detects has respectively supplied power to said electronic control unit (110) and electronic control unit peripheral electron parts (120); And the delivery vehicle of equipping this electric-control system (100) has begun to start; Each electrical quantity when different running status; With each just often corresponding electrical parameter values relatively, further judge whether to exist fault, again if any then solving.

7. electric-control system detection method according to claim 6 is characterized in that: also comprise the abort situation of using the said electric-control system of substitution method preliminary judgement (100) according to the following steps:

5. by the disconnection that is electrically connected of the on-off circuit (220) of said CPU module (200) with electronic control unit (110) with the electronic control unit peripheral electron parts (120) of said electric-control system; And simulate said electronic control unit peripheral electron parts (120) by the electronic unit mimic channel (260) of said CPU module (200) and insert said electronic control unit (110); Detect said electronic control unit (110) by the testing circuit (250) of said CPU module (200) more whether corresponding output signal is arranged; And judge whether said electronic control unit (110) is normal; As said really electronic control unit (110) fault then solves, as not being then to continue next step;

6. by the connection that is electrically connected of the on-off circuit (220) of said CPU module (200) with electronic control unit (110) with the electronic control unit peripheral electron parts (120) of said electric-control system; Break off a certain parts of said electronic control unit peripheral electron parts (120) and the CC of electronic control unit (110) one by one by said on-off circuit (220) again; Then simulate a certain parts access primary circuit of these electronic control unit peripheral electron parts (120) that are disconnected by said electronic unit mimic channel (260); If fault disappears, then can judge it is a certain parts damages of these electronic control unit peripheral electron parts (120) basically; Continue to break off one by one another parts of said electronic control unit peripheral electron parts (120) if fault is not removed, and insert, till finding abort situation by said electronic unit mimic channel (260) simulation.

8. electric-control system detection method according to claim 6 is characterized in that: also be included in step 1. before, carry out the abort situation of the said electric-control system of preliminary judgement (100) according to the following steps:

1. A by the communicating circuit (230) of said CPU module (200) through said on-off circuit (220) and electronic control unit (110) communication; Obtain failure code, voltage data and the temperature data of said electronic control unit (110); And transmission fill order; And judge the general abort situation of said electric-control system (100) in view of the above, testing circuit (250) and the electronic unit mimic channel (260) by said CPU module (200) detects and simulates according to the result again.

9. electric-control system detection method based on the said electric-control system pick-up unit of claim 1; It is characterized in that: the weighting profit requires at least two of the pick-up units of electric-control system described in 1; Be numbered A, B...; At first the wire harness electrical interface (125) and the electronic control unit electrical interface (115) that were plugged on originally on each electric-control system (100) are together separated; Again with the electrical interface (510,520) of at least one A number said electric-control system pick-up unit interface module (500) respectively with a normal electric-control system (100) in electronic control unit electrical interface (115) be connected with wire harness electrical interface (125), the electrical interface of another B number said electric-control system pick-up unit interface module (500) (510,520) has the electronic control unit electrical interface (115) in the electric-control system (100) that fault need check to be connected with wire harness electrical interface (125) with one respectively at least; But the then abort situation of the said electric-control system of preliminary judgement (100) according to the following steps successively:

1. A number said electric-control system pick-up unit detects some projects or a plurality of project of normal electric-control system (100), the detection data of this project or a plurality of projects is stored in the CPU module (200) of A number said electric-control system pick-up unit;

2. the CPU module of A number said electric-control system pick-up unit (200) sends instruction; By the radio receiving transmitting module (240) or the network transmission module communication of its radio receiving transmitting module (240) or network transmission module and B number said electric-control system pick-up unit, require B number said electric-control system pick-up unit also to detect this project or a plurality of project of fault electric-control system (100);

3. B number said electric-control system pick-up unit detects this project or a plurality of project, the detection data of this project or a plurality of projects is stored in the CPU module (200) of B number said electric-control system pick-up unit;

4. the CPU module of B number said electric-control system pick-up unit (200) sends and detects the instruction of accomplishing; By radio receiving transmitting module (240) or the network transmission module communication of its radio receiving transmitting module (240) or network transmission module to A number said electric-control system pick-up unit; After A number said electric-control system pick-up unit receives this signal; Send instruction, require B number said electric-control system pick-up unit to transmit it and detect data to A number said electric-control system pick-up unit;

5. after the detection data that B number said electric-control system pick-up unit of A number said electric-control system pick-up unit reception passed back, also should detect data and be stored in its CPU module (200);

6. A number said electric-control system pick-up unit detects data to two or many and compare, and be undesired like this project or certain some project, terminating operation then, and show by said human-computer interface module (300); As normally, proceed the detection of other project, 6. 1. repeating step arrive, till finding abort situation.