CN1465984A - Unusual detector for vehicle carried electric loading driving system - Google Patents
Unusual detector for vehicle carried electric loading driving system Download PDFInfo
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- CN1465984A CN1465984A CNA021233608A CN02123360A CN1465984A CN 1465984 A CN1465984 A CN 1465984A CN A021233608 A CNA021233608 A CN A021233608A CN 02123360 A CN02123360 A CN 02123360A CN 1465984 A CN1465984 A CN 1465984A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention reveals a vehicle carrying electric-load drive system's abnormity detecting device. The switch components which performs the on-off actions by the interrupting signals and from drive electric loads Use diodes to perform logic-and linkage on several state detecting signals responding when switch components turn off, which used as synthesized stated signal to be input into for temporary storage, and use and pulse edges read the storage to reset. If the read storage information table shows abnormity, the abnormity alarming displayer acts.
Description
Technical field
The present invention relates to be used for the abnormal detector of the onboard electrical load driving system of a plurality of electrical loads of drive controlling (being heterogeneous field coil etc. during stepper motor), for example be used to be arranged on the recyclegas flow control valve on the vehicle engine exhaust gas circulation road, the drive controlling such as inlet valve of the idler revolutions control usefulness particularly broken string or the short circuit of electrical load self are unusual, it is unusual that electric appliance load drives the broken string or the short circuit of on-off element of usefulness, the invention still further relates to the abnormal detector of the onboard electrical drive system that can be easily the broken string or the short circuit of the wiring between electrical load and on-off element etc. is detected unusually and improved in addition.
Background technology
Usually well-known, as the abnormal detector that is contained in the electrical load drive system on the engine for automobile, for unusual (broken string or short circuit are unusual), the electrical load that detects electrical load self drive connect up between unusual or electrical load and on-off element with on-off element unusually, the known device that has in various manners.
The 1st kind device was when electrical load for utilize detecting the mode of load current in the past, monitored the voltage drop that takes place on resistors in series in current detecting, judged whether the electric current that is flowing through is appropriate.
At this moment, as load short circuits or short-circuit take place, then on electrical load, can flow through unusual big electric current, on the other hand, if the closed circuit of generation load broken string, wiring broken string or on-off element is unusual etc., can be lower than setting by the electrical load electric current, synthetically detect the unusual of each several part.
Such load current detection mode is short-circuited when unusual in load or wiring, and at cut-off switch element automatically, effective when preventing that on-off element from damaging, but when electrical load is inductive load, rise because current slow will take place after the on-off element conducting soon, handle in order to avoid will break carelessly and fail to judge unusually so need to do to postpone to detect.
In addition, the 2nd kind device was a detection mode of utilizing leakage current in the past, be with load driving with on-off element and be connected the resistance that flows through the high value that leakage current uses with changing, monitor the branch pressure voltage of this high resistance measurement.
In this occasion, then unusual during the cut-off switch element as the short circuit of the broken string of electrical load, wiring or on-off element if leakage current flows through on the electrical load, can synthetically detect the unusual of each several part.
In addition, the 3rd kind device was when on-off element is used in disconnection electrical load (inductive load) driving for utilizing the mode that detects surge voltage in the past, detected the surge voltage that inductive load takes place.
At this moment, unusual as the disconnection that, electrical load unusual because of the disconnection of the broken string of electrical load, wiring, on-off element, the short circuit of wiring cause if no surge voltage, can synthetically detect each several part unusually.
But be, use the surge current detection mode, also can postpone to take place surge voltage after on-off element disconnects soon, thus just need to postpone to detect to handle, in order to avoid carelessly to unusual erroneous judgement.
For example in the waste gas circulation control valve device of reference Japanese kokai publication hei 3-203599 communique (speciallyying permit No. 2639144), disclosed the abnormal detector of the driving system of stepping motor that utilizes the load current detection mode.
At this moment, come with " external hardware (following represent with H/W) mode ", feasible with the exception deferral door lock relevant with four field coils of stepper motor, these comprehensive abnormality judings that connect in the AND mode are input microprocessor as a result.
In addition, in the output open circuit pick-up unit of hyperchannel (a plurality of systems) output unit of reference Japanese kokai publication hei 10-257799 communique, disclosed the abnormal detector that utilizes the driving system of stepping motor that detects the leakage current mode.
At this moment, come the normal state signal relevant with 4 field coils of stepper motor to be coupled together with " outside H/W mode " OR mode with diode, integrating circuit is resetted simultaneously, and the output of integrating circuit as required can input microprocessor as comprehensive abnormality juding result.
Equally, in the Fuelinjection nozzle driving circuit of reference Japanese kokai publication hei 10-9027 communique, also disclosed and utilized the Fuelinjection nozzle that detects the leakage current mode to drive the abnormal detector of using the solenoid drive system.
On the driving device for step-by-step of reference Japanese kokai publication hei 7-99796 communique, disclosed the abnormal detector of the driving system of stepping motor of working load current detecting mode and leakage current detection way in the lump again.
At this moment, adopt " in house software (following represent) mode ", make various status signals carry out logic and connect the back input microprocessor with S/W, by in microprocessor to the burst periods imported and the supervision of dutycycle, detect broken string or short circuit.
In addition, in the failure detector circuit of fuel injection valve for IC engines driving circuit, disclosed the Fuelinjection nozzle that utilizes the surge voltage detection mode and driven abnormal detector with the solenoid drive system with reference to the special fair 7-92016 communique of Japan.
In addition, as mentioned above as well-known abnormal detector to a plurality of electrical loads, roughly can be divided into hardware will judge and the abnormal detector of synthetic " the outside H/W mode " of input microprocessor as a result and will synthesize after the status signal input microprocessor, carry out the abnormal detector of " the inner S/W mode " of determination processing at microprocessor internal.
For example, when adopting, comparatively unfavorable on physical dimension and cost of manufacture with reference to such " the outside H/W mode " of above-mentioned Japanese kokai publication hei 3-203599 communique, Japanese kokai publication hei 10-257799 communique.
So Given this comparatively desirable with reference to " the inner S/W mode " of above-mentioned Japanese kokai publication hei 7-99796 communique, still, at this moment not being disclosed in specific in a plurality of electrical loads is the unusual notion of which load system.
Summary of the invention
The abnormal detector of onboard electrical load driving system in the past adopts outside H/W mode as mentioned above, exists comparatively disadvantageous problem on physical dimension and cost of manufacture.
In addition, when adopting inner S/W mode, not specific in numerous electrical loads is the unusual notion of which load system, thus, has the problem of maintenance activity difficulty.
In addition, when adopting inner S/W mode, even only load system is had the no abnormal synthetic determination of making, but owing to have the influence of noise (will narrate later on) that interacts, so be difficult to making correct judgement unusually.
The present invention is for solving the problems of the technologies described above, its purpose is the single synthetic state detection signal that each state detection signal by cheapness and easy outside H/W carries out after logic connects is input to microprocessor, handle by S/W in the microprocessor, carry out correct abnormality detection, simultaneously, correctly the load system of specific exceptions is easy to the abnormal detector of onboard electrical load driving system thereby obtain to make maintenance to become.
The abnormal detector of the onboard electrical load driving system of the 1st invention of the present invention comprises the on-vehicle battery that supply voltage takes place, generate the microprocessor of discontinuous signal by the on-vehicle battery power supply, the response discontinuous signal differ from one another the on-off element of a plurality of systems of switch work in regular turn constantly mutually, switch motion by each on-off element, electrical load to each separately-driven a plurality of system of system, the individual states detection signal of a plurality of systems of the individual states of each system of representing each on-off element and each electrical load is carried out logic to be connected, be input to the detection signal synthesizer of microprocessor as the synthetic state detection signal, with abnormal alarm display device by microprocessor driven, a kind of abnormality during each state detection signal is represented following three kinds of short circuits of each system at least or opened a way unusually, the short circuit or the open circuit that are on-off element are unusual, the short circuit of electrical load or open circuit are unusual, short circuit of connecting up between on-off element and electrical load or open circuit are unusual, microprocessor comprises the apparatus for temporary storage of the synthetic state detection signal of storage input, the content that this rises constantly or the moment that descends is read apparatus for temporary storage at discontinuous signal, each on-off element is judged by each system, each electrical load, have at least none unusual in the wiring between each on-off element and electrical load, and indivedual judgement memory storages of storage, with after the action of indivedual judgement memory storage, eliminate the resetting means of apparatus for temporary storage content, when in the indivedual judgement of expression memory storage, having at least a memory contents unusual, just make the action of abnormal alarm display device.
Again, the abnormal detector of the onboard electrical load driving system of the 2nd invention of the present invention is in the 1st invention, and electrical load comprises by the inductive load of on-vehicle battery power supply, individual states detection signal and being made up of the much higher surge voltage of ratio supply voltage that is produced when disconnecting the power supply of electrical load.
In addition, the abnormal detector of the onboard electrical load driving system of the 3rd invention of the present invention is in the 1st invention, the differential signal voltage that the individual states detection signal is used by the change in voltage that detects electrical load drive output is formed, and can not repeat to generate a plurality of individual states detecting signals at synchronization.
In addition, the abnormal detector of the onboard electrical load driving system of the 4th invention of the present invention is in the 1st to 3 each invention, microprocessor comprises the interface that is connected with external tool, when the content of indivedual judgement memory storages is read demonstration by interface inside and outside instrument, can set by external tool.
Again, the abnormal detector of the onboard electrical load driving system of the 5th invention of the present invention is in the 1st to 4 each invention, electrical load comprises the field coil of multi-phase stepping motors, judges that individually memory storage carries out storage action for the specific sense of rotation of multi-phase stepping motors.
Again, the abnormal detector of the onboard electrical load driving system of the 6th invention of the present invention is in the 1st to the 4th each invention, electrical load comprises that field coil, the microprocessor of multi-phase stepping motors comprise the sense of rotation decision maker of judging the multi-phase stepping motors sense of rotation, judge that memory storage responds to the result of determination of sense of rotation decision maker individually, and identification comprises the failure system of field coil.
Description of drawings
Fig. 1 represents the square frame pie graph of the invention process form 1
Fig. 2 is the time flow chart of each signal waveform of the normal turn of expression the invention process form 1 when doing.
The time flow chart of each signal waveform when Fig. 3 is the normal reverse action of expression the invention process form 1.
Fig. 4 is the time flow chart of each signal waveform of the A system of expression the invention process form 1 when turn when unusual taking place doing.
Fig. 5 is the process flow diagram that the first half of expression the invention process form 1 is handled action.
Fig. 6 is the process flow diagram of the latter half of processing action of expression the invention process form 1.
Fig. 7 represents the square frame pie graph of the invention process form 2.
Symbol description
100a, the 100b abnormal detector, 101a, the 101b stepper motor, 103a～103d excitation line chart (electrical load), 104 on-vehicle batteries, 106 abnormal alarm displays, 108a～108d driving resistor device (electrical load), 110a, the 110b microprocessor, 111 interfaces, 114a～114d on-off element, 116a, 116b " or " connect with diode (detection signal synthesizer), 130a, 130bRAM (apparatus for temporary storage), 140 external tools, 200a～100d, 300a～300d surge voltage (individual states detection signal), 503,513,523,524 processing of being done by the sense of rotation decision maker, 506b, 506d, 506br, the processing that 506cr is done by indivedual judgement memory storages, the processing that 507cd is done by resetting means, 516a, 516c, 516ar, the processing 517dc that 516dr is done by indivedual judgement memory storages, the processing that 517aa is done by resetting means, 521 processing of being done by the abnormal alarm display device, FA～FD, sign (judging memory storage individually), P1, the P2 discontinuous signal, P3 synthetic state detection signal.
Embodiment
Example 1
Below, with reference to accompanying drawing, example 1 of the present invention is elaborated.
Fig. 1 is the square frame pie graph of expression example 1 of the present invention.
At Fig. 1, abnormal detector 100a has microprocessor (CPU) 110a, the circuit key element 111～125 relevant with microprocessor 110a (narration later on), power supply terminal IGS and the sub-BAT of cell input terminal, and the splicing ear A1～D1 of 4 systems, by splicing ear A1～D1 drive controlling and the outside stepper motor 101a that is connected.
Microprocessor 100a has the lead-out terminal of exporting discontinuous signal P1, P2, interrupting input end, the sub-LP of demonstration (lamp) drive output and RAM130a and the ROM131a that is taken into abnormality detection usefulness synthetic state detection signal P3.
Stepper motor 101a has the splicing ear A2～D2 of field coil 103a, 103b, 103c, 103d and 4 systems of rotor 102, heterogeneous (4 phase).
Each field coil 103a～103d passes through splicing ear A2, B2, C2, D2, is connected with splicing ear A1, B1, C1, the D1 of abnormal detector 100a.
The other end of each field coil 103a～103d in the stepper motor 101a is connected by the lead-out terminal of power switch 105 with on-vehicle battery 104, and stepper motor 101a is by the supply voltage power supply of power switch 105 by electric live pond 104.
In addition, the sub-BAT of the cell input terminal of abnormal detector 100a directly is connected with on-vehicle battery 104, the power supply terminal IGS of abnormal detector 100a is connected on the on-vehicle battery 104 by power switch 105.
Thus, can be for abnormal detector 100a by directly powering from the supply voltage of on-vehicle battery 104 or powering by power switch 105.
The abnormal alarm display of being made up of pilot lamp etc. 106 drives under microprocessor 110a control at abnormal detector 100a.In addition, external tool 140 is connected in the abnormal detector 100a on the microprocessor 110a by cable 141.
At abnormal detector 100a, the interface 111 of communication usefulness is connected with external tool 140 with microprocessor 110a.
Pull down resistor 112a, 112c are pulled down to the ground connection side with discontinuous signal P1, the P2 of microprocessor 100a output.
In addition, the collector terminal of each on-off element 114a～114d connects by OR uses diode 116a, is connected on the resistance 117, and the other end of resistance 117 is connected on the reflecting plate lead-in wire of transistor 118.
The expelling plate lead-in wire of transistor 118 is gone up by resistance 117 and is connected on negative electrode one side of OR connection with diode 116a, is connected on the power supply terminal IGS by emitter resistance 119 simultaneously.
Between the base lead of transistor 118 and power supply terminal IGS, connecting and falling at diode 120.The collector terminal of transistor 118 drives the transistor 122 of grounded emitter by base resistance 121.
Connect ballast resistor 123 between the base/emitter lead-in wire of transistor 122.The collector terminal that generates the transistor 122 of synthetic state detection signal P3 is connected on interrupting input end of microprocessor 110a.
Power supply unit (PSU) 124 will be output into control by the supply voltage conversion of power supply terminal IGS and BAT terminal feeding and use burning voltage, and microprocessor 10a feed.
Pull-up resistor 125 is connected between the lead-out terminal of the collector terminal of transistor 122 and power supply unit 124.
Moreover the supply voltage of supplying with from power supply terminal BAT is the standby power supply during as open circuit with power switch 105, is used to store the partial content of the RAM130a of maintenance and microprocessor 110a concerted action.
In addition, microprocessor 110a connects according to having the program of ROM131a, when carrying out between the control action, also communicating by letter with external tool 114 by interface 111.
In addition, the synthetic state signal P3 of interrupting input end of input microprocessor 110a is monitored by microprocessor 110a always, and the L level signal as meaningful signal, is imported RAM130a.
Then, with reference to Fig. 2～time flow chart shown in Figure 4, the work of the invention process form 1 is elaborated.
The time flow chart of each signal waveform when Fig. 2 does for the normal turn of expression stepper motor 101a.
At Fig. 2, the rising of the discontinuous signal P1 of microprocessor 110a is regularly represented with edge E1, E5, E9, descends and regularly represents with edge E3, E7, E11.
In addition, the rising edge of the discontinuous signal P2 of microprocessor 110a along represent with E4, E8, E12, trailing edge is along representing with E2, E6, E10.
Rising edge at discontinuous signal P1 becomes the H level along E1, E5, E9 discontinuous signal P2 constantly, and the trailing edge of discontinuous signal P1 becomes the L level along E3, E7, E11 discontinuous signal P2 constantly, and this just represents just changeing state.
A1, B1, C1, D1 represent that the collector terminal voltage waveform of on-off element 114a, 114b, 114c, 114d is splicing ear A1, the B1 of abnormal detector 100a, the voltage waveform of C1, D1, are L when field coil 103a, 103b, 103c, 103d energising, are the H level when disconnecting
Surge voltage (individual states detection signal) waveform that 200a～200d in each level waveform A1, B1, C1, D1 takes place during for electrical load, 200a is for the trailing edge of discontinuous signal P1 surge voltage, the 200b when E3 disconnects field coil 103a feed being rising edge with the discontinuous signal P1 surge voltage during along E1 disconnection field coil 103b feed.
In addition, 200c is for the trailing edge of the discontinuous signal P2 surge voltage when E2 disconnects field coil 103c feed, and 200d is for the rising edge of the discontinuous signal P2 surge voltage when E4 disconnects field coil 103d feed.
Electric current (individual states detection signal) by each surge voltage 200a～200d flows is synthesized with diode 116a by the OR connection, and then, by resistance 117, emitter resistance 119 and power switch 105, absorbed by on-vehicle battery 104.
But the individual states detection signal after part is synthetic flows to and falls at diode 120 driving transistorss 118, again through transistor 118 and base resistance 121 driving transistorss 122.
Therefore, when taking place, the synthetic state detection signal P3 of input microprocessor 110a becomes the meaning and is normal signal L level at surge voltage 200a～200d.
Synthetic state detection signal P3 is deposited in the interior temporary storage of RAM130a immediately by interrupt action reading into the microprocessor 110a.
The content that deposits the temporary storage in the RAM130a in read with regularly (rising edge of discontinuous signal P1 and P2 along or trailing edge along) next time and judge after reset again.
Then, the synthetic state of the new input of storage is deposited signal P3 in order.
The time flow chart of each signal waveform when Fig. 3 normally reverses action for expression stepper motor 101a.
At Fig. 3, the same with aforementioned (with reference to Fig. 2), the rising edge of discontinuous signal P1 is continued to use E1, E5, E9 represents, trailing edge is continued to use E3, E7, E11 represents, the trailing edge of discontinuous signal P2 is continued to use E4, E8, E12 represents, rising edge is continued to use E2, E6, E10 represents.
On the other hand, because of Fig. 3 is an inverted status, opposite with aforementioned (Fig. 2), become the L level at the rising edge of discontinuous signal P1 along E1, E5, E9 discontinuous signal P2 constantly, simultaneously, E3, E7, the E11 discontinuous signal P2 constantly on the trailing edge edge of discontinuous signal P1 becomes the H level.
Splicing ear A1, the B1 of abnormal detector 100a, the voltage of C1, D1 make shape represent the collector voltage waveform of on-off element 114a, 114b, 114c, 114d, and become the L level when field coil 103a, 103b, 103c, 103d feed, become the H level during disconnection.
300a is for being to be that trailing edge with discontinuous signal P2 surge voltage, the 300d during along E4 disconnection field coil 103c feed is the surge voltage of rising edge during along E2 disconnection field coil 103d feed of using discontinuous signal P2 with the rising edge of discontinuous signal P1 surge voltage, the 300c when E1 disconnects field coil 103b feed with the trailing edge of discontinuous signal P1 surge voltage, the 300b when E3 disconnects field coil 103a feed.
The electric current (individual states detection signal) that is flowed by each surge voltage 300a～300d is absorbed by on-vehicle battery 104 with diode 116a, 117, emitter resistance 119, power switch 105 through the OR connection with aforementioned the same.
In addition, part individual states detection signal is through buck diode driving transistors 118, through transistor 118 and base resistance 121, driving transistors 122.
Therefore, the same with aforementioned (Fig. 2), when surge voltage 300a～300d took place, synthetic state detection signal P3 became the L level.
Moreover in the train of impulses of synthetic state detection signal P3, for example the pulse E2B of the initial L level meaning is the timing at edge E2 in Fig. 2 and Fig. 3, reads and judge the state (individual states detection signal) of the field coil 103b that causes because of surge voltage 300b.
Break in the system of Fig. 4 for expression field coil 103a, the time flow chart of each signal waveform when stepper motor 101a turn is done.
In Fig. 4, surge voltage 200b, 200c, 200d are identical with aforementioned (with reference to Fig. 2).
At this moment, in the voltage waveform of splicing ear A1,, in fact become nonevent state for original voltage waveform (with reference to dotted line).
Therefore,, should become the pulse E4 (A) (with reference to dotted line) of L level originally, in fact still still become the H level even in synthetic state detection signal P3.
On the other hand, in the voltage waveform of splicing ear B1,400c is an induction voltage waveform, for with the trailing edge of discontinuous signal P2 during along E2 cut-off switch element 103c, by the surge voltage 200c of field coil 103c generation, thus the voltage waveform that on the field coil 103b that disconnects feed ten, induces.
Originally, in the moment that induction voltage waveform 400c takes place, field coil 103a was in the energising, induced voltage should be absorbed by field coil 103a, but as the abnormal results of field coil 103a broken string, induction voltage waveform 400c takes place on splicing ear B1 as shown in Figure 4
Continuous L level state takes place twice in its result, synthetic state detection signal P3, but temporary signal level L state is constant, so no problem.
If careful to above-mentioned induction, it is invalid then as can be known the umber of pulse of the synthetic state detection signal P3 that imports being counted such judgement in specified time limit.Why like this, to be because can be with the cancel out each other cause of the waveform that replaces gaps and omissions of unnecessary waveform.
In addition, if the broken string of field coil 103a～13d or wiring takes place, the short circuit of the loose contact of connector or on-off element 114a～114d is unusual etc., the timing of on-off element 114a～114d for disconnecting, surge voltage 200a～200d, 300a～300d does not take place.
In addition, even the short circuit of field coil 103a～103d or wiring takes place, the open circuit of on-off element 114a～114d is unusual, and the last electric current that should flow state of field coil 103a～103d does not become and flows through, and being placed on the timing that on-off element 114a～114d should disconnect does not have surge voltage to take place.
Therefore, in above-mentioned arbitrary occasion, microprocessor 110a all can be as being detected unusually from synthetic state detection signal P3.
Below, with Fig. 1～Fig. 4, with reference to the process flow diagram of Fig. 5 and Fig. 6, the action to the invention process form 1 elaborates again.
Fig. 5 represents the first half processing action of this invention example 1, the latter half of processing action afterwards of the A portion (step 510) in Fig. 6 presentation graphs 5.
At first, at Fig. 5, microprocessor 110a judges the rising (step 501) that whether detects discontinuous signal P1 after action beginning (step 500).Step 501 is done the standby action repeatedly until the rising that detects discontinuous signal P1.
In step 501, if measure the rising (being YES) that has detected discontinuous signal P1, then follow, just take a decision as to whether first rise (step 502) in power switch 105 closed backs.
In step 502, if be judged to be first rising (being YES), then enter step 507CD (narration later on), the uncertain in the past temporary information of relevant synthetic state detection signal is resetted.
On the other hand, in step 502,, judge with that then whether discontinuous signal P2 is H level (step 503) if judge non-first rising (being NO).
In step 503, if judge that discontinuous signal P2 is H level (being YES), because the turn of presentation graphs 2 does, so read temporary synthetic state detection signal P3 (step 504d) with interrupt action.
Then, whether the synthetic state detection signal P3 that determination step 504d reads is significant signal (L level) (step 505d), if judge not storage (being NO) significant signal (L level), then puts sign FD (step 506d), enters step 507cd.
In addition, at step 505D, if judge that just storing (being YES) significant signal (L level), enter step 507 immediately, P3 resets with the synthetic state detection signal.
On the other hand, in step 503, if judge that discontinuous signal P2 is L level (being NO), because the counter-rotating of presentation graphs 3 action, so read temporary synthetic state detection signal P3 (step 504cr) with interrupt action.
Then, whether the synthetic state detection signal P3 that determination step 504cr reads is meaningful signal (L level) (step 505cr), if judge not storage (being NO) significant signal (L level), then puts sign FC (step 506cR), enters step 507cd.
At step 505cr,, then enter step 507cD immediately again if (being YES) meaningful signal (L level) is being stored in judgement.
Step 507cd is the temporary processing that resets and make the H level with synthetic state detection signal P3, when step 502 is judged first action, there is the occasion of meaningful signal (being YES) with regard to execution at determination step 505d or 505cr, simultaneously, judging the occasion that does not store meaning signal (being NO), then then after step 506d and 506cr, carry out.
Then, judge the decline (step 508) that whether detects discontinuous signal P2,, then then judge the rising (step 509) that whether detects discontinuous signal P2 if judge the decline that does not detect (being NO) discontinuous signal P2.
In step 509,, then be returned to step 508 if judge the rising that does not detect (being NO) discontinuous signal P2.
Therefore, the decline that detects discontinuous signal P2 in step 508 not, or in step 509 until the rising that detects discontinuous signal P2, carry out the standby action of depending on step 508 and Figure 50 9 repeatedly always.
In step 508, if judge the decline (being YES) that detects discontinuous signal P2, (with reference to step 501) discontinuous signal P2 descends (turn of Fig. 2 is done) when being illustrated in discontinuous signal P1 and rising, so read temporary synthetic state detection signal P3 (step 504b) with interrupt action.
Then, judge whether the synthetic state detection signal P3 that reads is significant signal (L level) (step 505b), then put sign FB (step 506b), proceed to step 507bb if be judged to be the meaningful signal (L level) of not storage (being NO).
At step 505b, see significant signal (L level) if judge storage (being YES) again, then promptly proceed to step 507bb, synthetic state detection signal P3 resets.
On the other hand, in step 509, if judge the rising (being YES) that detects discontinuous signal P2, (with reference to step 501) discontinuous signal P2 rises (the counter-rotating action of Fig. 3) when then being illustrated in discontinuous signal P1 and rising, so read temporary synthetic state detection signal P3 (step 504br) with interrupt action.
Then, whether judgement is meaningful signal (L level) (step 505br) at the synthetic state detection signal P3 that step 504br reads, if be judged to be not storage (being NO) meaningful signal (L level), then put sign FB (step 506br), proceed to step 507bb.
Again at step 505br, if judge that just storing (being YES) sees meaningful signal (L level), then promptly proceeds to step 407bb.
Step 507bb does the processing of H level with temporary the resetting of synthetic state detection signal P3, when having significant signal (being YES), determination step 505b or 505br just carry out, simultaneously, when significant signal (being NO) is not stored in judgement, continue to carry out at step 506b and 506br place.
Below, the summary of the processing of Fig. 5 action gathered it is described once again.
At first, the synthetic state detection signal P3 of interruption input microprocessor 110a is the logic and the signal of the surge voltage (individual states detection signal) of normal each excitation wire Figure 103 a, 103b, 103c, 103d generation.
Therefore, surge voltage if taking place in each excitation wire Figure 103 a, 103b, 103c, 103d, and then as having normal significant signal, the synthetic state detection signal P3 of L level is temporarily stored in RAM130a and gathers.
Microprocessor 110a is reading and is judging the meaningful signal that has or not that is temporarily stored among the RAM130a afterwards, (not taking place unusual) when having the signal of meaning (L level), is unusual by which excitation line chart in indivedual judgement memory storages (step 506d, 506cr, 506b, 506br) 4 systems of storage (wiring of a series of excitation line charts and on-off element).
Processing during promptly as turn, step 506d storage excitation wire Figure 103 d system unusual, step 506b storage excitation wire Figure 103 b provide unusual.
In addition,, store the unusual of excitation wire Figure 103 c system, store the unusual of excitation wire Figure 103 b system at step 506br at step 506cr as the processing of counter-rotating action.
In case when the judgement of the output interval of each discontinuous signal P1, P2 and storage finished, temporary just resetting (step 507cd, 507bb) prepared the action in next interval and judged.
In addition, at Fig. 5, comprise the processing of the step 523 of determination step 508 and 509 for root choice direction decision maker, same, determination step 503 also is the processing according to the sense of rotation decision maker.
In addition, step 507cd is the processing according to resetting means.
In addition, step 130a is the temporary processing according to the synthetic state detection signal P3 of RAM130a, and is shown in dotted arrow, relevant with step 504d and step 507cd.
Be temporarily stored in the interior every driving of each excitation wire of synthetic state detection signal P3 (with reference to Fig. 2) Figure 103 a～103d of RAM130a once, can read simultaneously, can also reset by step 507cd by step 504.
The individual states detection signal that is each system can (read in the switch motion regularly of excitation wire Figure 103 a～103d) the electrical load of its mao system next time.
Thus, synthetic state detection signal P3 (for example with reference to Fig. 2) that in fact can be by 1 system thus detect the surge voltage (individual states detection signal) of each system.
Below, to the A portion (step 510) in Fig. 5 afterwards, the processing of Fig. 6 action describes.
In Fig. 6, at first after abovementioned steps 507bb, judge the decline (step 511) that whether detects discontinuous signal P1.
Step 511 is carried out the standby action repeatedly, until the decline that detects discontinuous signal P1.
In step 511,, judge with that then whether discontinuous signal P2 is L level (step 513) if judge the decline (being YES) that detects discontinuous signal P1.
In step 513, if judge that discontinuous signal P2 is L level (being YES), then the turn of presentation graphs 2 is done, so read temporary synthetic state detection signal P3 (step 514c) with interrupt action.
Then, determination step 514c, whether the synthetic state detection signal P3 that reads is meaningful signal (L level) (step 515c), if judge not storage (being NO) significant signal (L level), (step 516c proceeds to step 517dc then to put sign FC.
In addition, at step 515c, see significant signal (L level) if judge storage (being YES), then promptly proceed to step 517dc, synthetic state detection signal P3 resets,
On the other hand, in step 513, if judge that discontinuous signal P2 is H level (being NO), the then counter-rotating of presentation graphs 3 action is so read temporary synthetic state detection signal P3 (step 514dr) with interrupt action.
Then, whether the synthetic state detection signal P3 that judgement is read in step 514 is significant signal (L level) (step 515dr), if be judged to be not storage (being NO) significant signal (L level), then puts sign, FD (step 516dr) proceeds to step 517dc.
In addition,, see significant signal (L level), then promptly proceed to step 517dc if judge storage (being YES) at step 515dr.)
Then, judge the rising (step 518) whether detect discontinuous signal P2,, below just judge the decline (step 519) that whether detects discontinuous signal P2 if judge the rising (being NO) that does not detect continuous signal P2.
In step 519, if judge the whereabouts (being NO) that does not detect discontinuous signal P2, then separate regression steps 518.
Therefore, the standby of execution in step 518 and step 519 action repeatedly detects the rising of discontinuous signal P2 until step 518, or detects the decline of discontinuous signal P2 in step 519.
In step 518, if judge the rising (being YES) that detects discontinuous signal P2, (with reference to step 511) discontinuous signal P2 rises (turn of Fig. 2 is done) when then being illustrated in discontinuous signal P1 decline, so read temporary synthetic state detection signal P3 (step 514a) with interrupt action.
Then, judge whether the synthetic state detection signal P3 that reads is significant signal (L level) (step 515a),, then put sign FA (step 516a) if be judged to be not storage (being NO) significant signal (L level), proceed to 517aa, synthetic state detection signal P3 resets.
On the other hand, in step 519, if judge the decline (being YES) that detects discontinuous signal P2, then because (with reference to step 511) discontinuous signal P2 descends (the counter-rotating action of Fig. 3) when being illustrated in discontinuous signal P1 and descending, so read temporary synthetic state detection signal P3 (step 514ar) with interrupt action.
Then, whether the synthetic state detection signal P3 that determination step 514ar reads is significant signal (L level) (step 515ar), do not have storage (being NO) significant signal (L level) then to put sign FA (step 516ar) if be judged to be, proceed to step 517aa.
After temporary the resetting of step 517aa synthetic state detection signal P3, whether FA～the FD that respectively indicates among microprocessor 110a process decision chart 5 and Fig. 6 gathers and has one to be set (step 520).
In step 520, be set (being YES) if be one among determination flag FA～FD, abnormal alarm output then takes place, drive abnormal alarm display 106 (steps 521), the processing release (step 522) of Fig. 6.
In addition, in step 522,, then finish the processing action (step 522) of Fig. 6 immediately if neither one is set (being NO) among determination flag FA～FD.
After the processing release of Fig. 6, stepper motor 101a returns to action beginning step 500 just in the running at once.
Below, the processing of Fig. 6 action gathered once more describe.
At first, if according to not storing significant signal among the temporary synthetic state detection signal P3 of each interruption input, then unusually not as a certain field coil system (wiring of a series of field coil and on-off element) in 4 systems of processing (step 516c, 516dr, 516a, 516ar) storage of indivedual judgement memory storages.
Processing when promptly doing as turn is stored the unusual of field coil 103c system at step 516c.Store the unusual of field coil 103a system at step 516a.
In addition, the processing during as the counter-rotating action is stored the unusual of field coil 103d system at step 516ar, stores the unusual of field coil 103a system at step 516ar.
In case when judgement in the output interval of each discontinuous signal P1, P2 and storage finished, temporary synthetic state detection signal P3 just resetted (step 517dc, 517aa), prepare to judge in next interval action.
Moreover, at Fig. 6, comprise that the step 523 of determination step 518 and 519 is the processing according to the sense of rotation decision maker.
Like this, make the on-off element 114a～114d of a plurality of systems (4 systems) in the moment that differs from one another switch motion in regular turn by the discontinuous signal P1, the P2 that generate by microprocessor 110a, (in the onboard electrical load driving system of 103a～103d), can detect the unusual generation state of each system effectively at the electrical load (field coil) that drives a plurality of systems (4 systems) by each on-off element 114a～114d one by one.
Promptly, at least can detect a following abnormality to each system, these abnormality are for the short circuit of each on-off element 114a～114d or open circuit is unusual, the short circuit of each field coil 103a～103d or open circuit is unusual and each on-off element 114a～114d and each field coil 103a～103d between the short circuit of connecting up or open circuit unusually.
At this moment, by comprising that OR connects with the detection signal synthesizer of diode 116a the individual states detection signal of each system is carried out the logic connection, synthetic state detection signal P3 input microprocessor 110a as a system so can simplify circuit structure, can not add cost yet.
That is, use diode 116a by adopting OR to connect, thus can be easily realizing that logic connects, and makes and does not repeat at a plurality of individual states detection signals of synchronization.
In addition, every couple of microprocessor 110a of synthetic state detection signal P3 interrupts importing and once just is temporarily stored among the RAM130a.Whenever discontinuous signal P1, P2 (intermediate sequence signal) this rising constantly or read once when descending constantly, judging has no abnormal and deposits indivedual judgement memory storages in (behind the sign FA～FD), eliminate by resetting means, thus can correctly detect in a plurality of systems at least one unusually.
In addition, (the individual states detection signal of each system is regularly read in excitation wire Figure 103 a～switch motion 103d) to the electrical load of other system next time by using, thereby switch along with this on-off element 114a～114d, even each indivedual state detection signal generation operating lag, do not need to postpone to detect to use time set yet, can be by the load system of indivedual judgement memory storage specific exceptions.
Promptly, temporary because of discontinuous signal P1, P2 rising or decline causes and have the some time to postpone the individual states detection signal that takes place, read constantly because will or descend and judge this canned data in the rising of discontinuous signal next time, so just do not need the detection corresponding with timing circuit etc., can simplify circuit with time delay.
In addition, will carry out logic for the individual states detection signal of a plurality of system electrical loads and connect, as synthetic state detection signal P3 input microprocessor 110a, the input terminal quantity that can save microprocessor 110a.
In addition,,, can only establish and merely carry out logic and connect OR that the individual states detection signal uses and connect and use diode 116a no matter have how decision-making function as the external hardware of microprocessor 110a, thus circuit structure can be done miniaturization.
In addition, in a plurality of systems, detect one at least when unusual,, thereby can notify the operator by 106 actions of abnormal alarm display.
In addition, field coil 103a～103d is the inductive load by on-vehicle battery 104 power supplies, so the individual states detection signal surge voltage greater than supply voltage can take place, thereby can positively detect when disconnecting to the electrical load feed.
Promptly can't help comparer relatively, and to the change with the surge voltage of power supply voltage variation, benchmark is that supply voltage also contains servo-actuated and changes, so can judge the surge voltage that whether takes place greater than setting simple and at an easy rate.
In addition, at Fig. 1, electrical load is made up of multi-phase excitation coil 103a～103d of stepper motor 101a, indivedual judge memory storages (the specific sense of rotation with multi-phase stepping motors 101a of sign FA～FD) is relevant, storing unusual information, so easy decision maker can be provided, for example only when the initialization running of certain sense of rotation, the drive system of carrying out stepper motor 101a is (under the such situation of the abnormality detection of on-off element 114a～114d).
In addition, indivedual judge memory storages (sign FA～FD) is according to the result of determination of the sense of rotation decision maker of judging stepper motor 101a sense of rotation, the system of unusual field coil 103a～103d takes place in identification, so the abnormal detector to the stepper motor 101a drive system of any sense of rotation can be provided.
In addition, in the rotating running of stepper motor 101a, always can carry out correct indivedual judgement storages.
In addition, the interface 111 that connects external tool 140 usefulness is set on microprocessor 110a, thus can provide with the corresponding display device of various requirement, maintenance activity that take place when unusual after sign initial reset device.
Therefore, microprocessor 110a passes through to communicate by letter with external tool 140 through interface, thereby reads the content of indivedual judgement memory storages (signs of a plurality of systems of narration later on), can show on abnormality alarm display 106 and clear and definite unusual load system.
That is, in the repairing and upkeep operation after unusual the generation, because can distinguish it is which load system is unusual clearly, so can be efficiently, place under repair with a definite target in view.
In addition, by communicating by letter, behind the maintenance activity that abnormality is disposed, can will judge individually that the internal initialization of memory storage (sign) resets with external tool 140.
And external tool 140 has writing and changes the multiple uses such as control program of microprocessor 110a, and the cost of abnormal detector is added, and can easily read unusual system.
Example 2
Moreover, in above-mentioned example 1, the surge voltage waveform, the generation synthetic state detection signal P3 that directly detect when electrical current disconnects, take place on splicing ear A1～D1, but also can generate synthetic state detection signal P3 according to when energising signal behind the voltage waveform differential that splicing ear A1～D1 takes place.
The square frame pie graph of the invention process form 2 of the differential voltage waveform when Fig. 6 utilizes energising for expression, for aforementioned (with reference to Fig. 1) identical part, then give prosign, or behind symbol note b, no longer describe in detail later on.
At this moment, be not aforesaid surge voltage just as the individual states detection signal, utilization be to electrical load (drive output of field coil 103a～the 103d) (voltage signal behind the change in voltage differential of splicing ear A1～D1).
At Fig. 6, stepper motor 101a adds aforesaid formation, comprises that load side switch element 107a, 107b, 107c, 107d and each load side switch element 107a, 107b, the 107c of 4 systems of the driving input side that inserts each field coil 103a～103d, the base resistance of 107d are driving resistor 108a, 108b, 108c, 108d.
Each load side switch element 107a～107d is made of the transistor that is connected in series with field coil 103a～103d.
In addition, each driving resistor 108a～108d constitutes electrical load with each field coil 103a～103d, by splicing ear A2～D2, is connected with splicing ear A1～D1 of abnormal detector 100b respectively.
The other end of each field coil 103A～103d is connected on the terminal of negative pole one side of on-vehicle battery 104 (ground connection).
In addition, the transmitter of each load side switch element 107a～107d goes between through power switch 105, is connected with on-vehicle battery 104.
In abnormal detector 100b, the collector terminal of each on-off element 114a～114d is connected with splicing ear A1～D1, simultaneously, is connected with OR with diode 116 connections by differential capacitance 126a, 126b, 126c, 126d.
127 use diode for discharge, are connected between the negative side terminal of the negative side of each differential capacitance 126a～126d and power supply (on-vehicle battery 104).
Discharge is connected into conducting along with each on-off element 114a～114d with diode 127, becomes the charging voltage polarity of discharge with each differential capacitance 126a～126d.
At this moment, transistor 118 and relevant factor thereof (resistance 117,119 and diode 120) all are omitted.
In addition, at Fig. 6, using as the individual states detection signal is not the differential signal of surge voltage, so, can detect the unusual of driving resistor 108a～108d in the wiring of on-off element 114A～114d, each system and the stepper motor 1016, but detects to go out load side switch element 107a～107d and field coil 103a～103d itself unusually.
Therefore, the unusual of load side switch element 107a～107d and field coil 103a～103d itself can detect in stepper motor 1016, the signal line input microprocessor 110b that testing result illustrates in figure.
For example, position transducer (not shown) that everybody is familiar with etc. is set around rotor 102, by the position of rotation corresponding with the driving timing of each field coil 103a～103d fed back to microprocessor 110b, in microprocessor 110a one side, can detect the unusual of load side switch element 107a～107d and field coil 103a～103d.
Below, to detailed the describing of the action of the invention process form 2.
At Fig. 6, for example on-off element 114a one conducting (closure), by the driving resistor 108a in the stepper motor 101b, load side switch element 107a conducting (closure), and field coil 103a feed.
Then, when on-off element 114a open circuit (disconnection), from on-vehicle battery 104, emitter terminal, driving resistor 108a, differential capacitance 126a, OR through power switch 105, load side switch element 107a connect the base circuit of using diode 116b, base resistance 121, reaching transistor 122, to differential capacitance 126a charging, make transistor 122 conductings by this charging current.
Afterwards, in a single day differential capacitance charges near supply voltage, and transistor 122 just transfers not conducting to, and the voltage that is filled on the differential capacitance 126 after on-off element 114a conducting, discharges with diode 127 by discharge.
As mentioned above, in order on differential capacitance 126a, to allow charging current flow through, transistor 122 is wanted conducting, just must satisfy the condition that wiring between driving resistor 108a, splicing ear A1 and A2 etc. does not have various necessity such as broken string, the action of on-off element 126a normal switch.
Therefore, when the condition of above-mentioned necessity does not satisfy, just can judge that to deposit some in the system of excitation wire Figure 103 a unusual.
This situation for other differential capacitance 126b, 126c, 126d too.
Like this, by utilizing the differential capacitance 126a～126d that detects the output voltage variation that drives each electrical load to be connected with OR with simple logic connection processing devices such as diode 116b, with aforementioned the same, at synchronization, a plurality of individual states detection signals can not be repeated, synthetic state detection signal P3 be can obtain, little shape and cheap abnormal detector made.
Example 3
In addition, above-mentioned example 1 is envisioned for the occasion in multi-phase stepping motors 101a rotating, but is also can only implement abnormality detection when stepper motor 101a initialization is turned round.
At this moment, be one regularly in the sense of rotation of stepper motor 101a, the processing of sense of rotation decision maker has not just needed in Fig. 5 and Fig. 6, can merely only do a processing corresponding with specific sense of rotation and move.
That is, judge that individually (FA～FD) store for the specific sense of rotation of stepper motor 101a is so can simplify the control program of microprocessor 110a in the abnormal detector 100a for memory storage.
Particularly when abnormal detector 100a has other more engine control function, can alleviate the burden of microprocessor 110a.
In addition, in above-mentioned example 1,2, synthetic state detection signal P3 input microprocessor 101a, 101b that status signal in the regular event is connected its logic as meaningful seizure logic level L, if no normal state signal (L level) then just is judged to be unusually, otherwise, also the signal logic of expression abnormal operation state can be connected back input microprocessor 101a, if no abnormal status signal just is judged to be normally.
In addition, in above-mentioned example 1, for rising edge edge and the trailing edge edge that detects discontinuous signal P1, P2, carry out determination step 502,508,511,518 and 519 (with reference to Fig. 5, Fig. 6), these all mean the processing action after discontinuous signal P1, P2 generate, and needn't add determination step more fully.
In addition, in above-mentioned example 1,2, with electrical load is that the situation of stepper motor field coil is that example is described, but the igniting line chart that is provided with one by one on also can electrical load, each cylinder of for example multicylinder engine for other, the fuel that is provided with one by one on each air entry of multicylinder engine spray the driving electromagnetic wire figure with solenoid valve.
No matter use which kind of device as electrical load, if comprise the discontinuous signal P1, the P2 that generate by by microprocessor, at the on-off element of a plurality of systems of the moment that differs from one another switch motion in regular turn, instead by each on-off element, the electrical load of a plurality of systems that can drive one by one then also can be obtained aforementioned same action effect certainly.
As mentioned above, according to the 1st invention of the present invention, comprise the on-vehicle battery that supply voltage takes place, generate the microprocessor of discontinuous signal by the on-vehicle battery power supply, and answer discontinuous signal and at the on-off element of a plurality of systems of the moment that differs from one another switch motion in regular turn, switch motion by each on-off element, electrical load in a plurality of systems that each system drives one by one, the individual states control signal of a plurality of systems of each system's individual states of expression each on-off element and electrical load is carried out logic to be connected, detection signal synthesizer as synthetic state detection signal input microprocessor, reach abnormal alarm display device by microprocessor driven, each state detection signal is represented a following abnormality at least, it is each system, the short circuit of on-off element or open circuit are unusual, the short circuit of electrical load or open circuit are unusual, short circuit of connecting up between on-off element and electrical load or open circuit are unusual, microprocessor comprises the apparatus for temporary storage of the synthetic state detection signal that storage is imported, the content that this rises constantly or the moment that descends is read apparatus for temporary storage at discontinuous signal, each system is judged and stores each electrical load, each on-off element, and be routed to rare none unusual indivedual judgement memory storage between each on-off element and each electrical load, with after the action of indivedual judgement memory storage, eliminate the resetting means of apparatus for temporary storage content, when in the indivedual judgement of expression memory storage, having at least a memory contents unusual, just make the action of abnormal alarm display device, so being that it(?) can not need postpone to detect, its effect uses time set, come the load system of specific exceptions by indivedual judgement memory storages, can save microprocessor input terminal quantity, certain decision-making function need not arranged as long as individual states detection signal monolithic ground is connected than carrying out logic as external hardware, can do the circuit formation little, constitute easily again with cheapness and correctly to carry out abnormality detection, simultaneously, make accurately that the specific exceptions load system becomes possibility, obtain and maintenance activity is become be easy to the abnormal detector of onboard electrical load driving system.
In addition, according to the 2nd invention of the present invention, in the 1st invention, electrical load comprises the inductive load by the on-vehicle battery power supply, the individual states detection signal by the ratio supply voltage that when disconnecting the electrical load power supply, produces much higher surge voltage form, so to surge voltage change along with power supply voltage variation, benchmark (supply voltage) also servo-actuated changes, so its effect is to use comparer, just can correctly carry out unusual detection with cheapness and easy structure, simultaneously, load system that can accurately specific exceptions is obtained the abnormal detector that can make the maintenance activity limit must be easy to the onboard electrical load driving system.
In addition, according to the 3rd invention of the present invention, in the 1st invention, the differential signal voltage that each indivedual state-detection is used by the change in voltage that detects electrical load drive output is formed, make it can not repeat to generate a plurality of individual states detection signals at synchronization, so its effect is and can detects synthetic state with the simple process of diode logic, correctly carry out abnormality detection with cheapness and easy structure, simultaneously, load system that can accurately specific exceptions is obtained and maintenance activity become be easy to the abnormal detector of onboard electrical load driving system.
In addition, according to the 4th invention of the present invention, in the 1st to the 3rd arbitrary invention, microprocessor comprises the interface that is connected with external tool, the content of indivedual judgement memory storages is made and can be read demonstration by external tool by interface, simultaneously, reset by external tool, so its effect is in the repairing and upkeep operation that take place after unusual, can distinguish clearly that unusual load system is efficient, that shoots the arrow at the target handles, after abnormality is made the maintenance activity of corresponding disposal, by with the communicating by letter of external tool, can will judge the content initial reset of memory storage individually,, can avoid the cost of abnormal detector own to add also and can read unusual system easily again by utilizing multiduty external tool, correctly carry out abnormality detection with cheap and easy structure, simultaneously, the load system of specific exceptions is exactly obtained and maintenance activity become be easy to the abnormal detector of onboard electrical load driving system.
In addition, according to the 5th invention of the present invention, in the 1st to the 4th arbitrary invention, electrical load comprises the field coil of multi-phase stepping motors, indivedual judgement memory storages are done the specific sense of rotation that is paired in multi-phase stepping motors and are carried out storage action, so, its effect is can make especially the microprocessor control program with a plurality of engine control functions to simplify, alleviate the burden of microprocessor, correctly carry out abnormality detection with cheapness and easy structure, simultaneously, the load system of specific exceptions is exactly obtained and maintenance activity become be easy to the abnormal detector of onboard electrical load driving system.
In addition, according to the 6th invention of the present invention, in the 1st to the 4th arbitrary invention, electrical load comprises the excitation line chart of multi-phase stepping motors, microprocessor comprises the sense of rotation decision maker of judging the multi-phase stepping motors sense of rotation, the result of determination that indivedual judgement memory storages are done paired sense of rotation decision maker responds, can discern the failure system that comprises field coil, so, its effect is that multi-phase stepping motors is in rotating, always can correctly judge storage individually, correctly judge storage individually with cheapness and easy structure, correctly carry out abnormality detection with cheapness and easy structure, simultaneously, load system that can accurately specific exceptions is obtained and maintenance activity become be easy to the abnormal detector of onboard electrical load driving system.
Claims (8)
1. the abnormal detector of an onboard electrical load driving system is characterized in that, comprises
The on-vehicle battery of generation supply voltage,
By described on-vehicle battery power supply, the microprocessor of generation discontinuous signal,
Described discontinuous signal is responded, the on-off element of a plurality of systems of the moment that differs from one another switch work in regular turn,
By the switch motion of described each on-off element, the electrical load of a plurality of systems that each system is driven one by one,
Described each on-off element of expression and the individual states detection signal of a plurality of systems of representing each system's individual states of described each electrical load are carried out logic are connected, as the synthetic state detection signal be input to described microprocessor the detection signal synthesizer and
By the abnormal alarm display device of described microprocessor driven,
Described each individual states detection signal is represented a following abnormality at least, be that the short circuit of the short circuit of described on-off element of each system or unusual, the described electrical load of opening a way or the open a way short circuit or the open circuit that connect up between unusual, described on-off element and described electrical load are unusual
Described microprocessor comprises
The apparatus for temporary storage of the described synthetic state detection signal of storage input,
The content that this rises constantly or the moment that descends is read described apparatus for temporary storage at described discontinuous signal, to each system, judge to be routed to that rare none is unusual between described each on-off element, described each electrical load, described each on-off element and described each electrical load, and indivedual judgement memory storages of storing and
After the action of described indivedual judgement memory storages, eliminate the resetting means of the content of described apparatus for temporary storage,
When to have a memory contents in described indivedual judgement memory storages at least be unusual, make described abnormal alarm display device action.
2. the abnormal detector of onboard electrical load driving system as claimed in claim 1 is characterized in that,
Described electrical load comprises the inductive load by described on-vehicle battery power supply,
The much higher surge voltage of the described supply voltage of ratio that described individual states detection signal takes place during by the energising that disconnects described electrical load is formed.
3. the abnormal detector of onboard electrical load driving system as claimed in claim 1 is characterized in that,
The differential signal voltage that described each individual states detection signal is used by the change in voltage that detects described electrical load drive output is formed, and can not repeat to generate a plurality of individual states detection signals at synchronization.
4. as the abnormal detector of each described onboard electrical load driving system of claim 1 to 3, it is characterized in that,
Described microprocessor comprises the interface that is connected with external tool,
The content of described indivedual storage decision makers when reading demonstration by interface by described external tool, is resetted by described external tool.
5. as the abnormal detector of each described onboard electrical load driving system of claim 1 to 3, it is characterized in that,
Described electrical load comprise multi-phase stepping motors the excitation line chart,
Described indivedual judgement memory storage carries out storage action to the specific sense of rotation of described multi-phase stepping motors.
6. as the abnormal detector of each described onboard electrical load driving system of claim 1 to 3, it is characterized in that,
Described electrical load comprises the field coil of described multi-phase stepping motors,
Described microprocessor comprise the sense of rotation decision maker of judging described multi-phase stepping motors sense of rotation,
Described indivedual judgement memory storage responds to the result of determination of described sense of rotation decision maker, and identification comprises the failure system of described field coil.
7. the abnormal detector of onboard electrical load driving system as claimed in claim 4 is characterized in that,
Described electrical load comprise multi-phase stepping motors field coil,
Described indivedual judgement memory storage carries out storage action to the specific sense of rotation of described multi-phase stepping motors.
8. the abnormal detector of onboard electrical load driving system as claimed in claim 4 is characterized in that,
Described electrical load comprise described multi-phase stepping motors field coil,
Described microprocessor comprise the sense of rotation decision maker of judging described multi-phase stepping motors sense of rotation,
Described indivedual judgement memory storage responds to the result of determination of described sense of rotation decision maker, and identification comprises the failure system of field coil.
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