CN204921962U - Position sensor and position sensing system - Google Patents
Position sensor and position sensing system Download PDFInfo
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- CN204921962U CN204921962U CN201520443698.4U CN201520443698U CN204921962U CN 204921962 U CN204921962 U CN 204921962U CN 201520443698 U CN201520443698 U CN 201520443698U CN 204921962 U CN204921962 U CN 204921962U
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Abstract
The utility model provides position sensor and position sensing system, position sensing system use position sensor, and position sensor is used for sensing derailleur neutral position and reverses gear the position, the fixed magnet that is equipped with on the gear level of derailleur, position sensor includes: two tunnel neutral gear sensing circuits and the liang lu sensing circuit that reverses gear, two tunnel neutral gear sensing circuits produce signal of the same kind respectively for neutral position signal and the redundant signal of signal neutral position all the way, reverse gear the sensing circuit and produce signal of the same kind respectively for the position sigual and the redundant signal in position that reverses gear all the way of reversing gear in every way. The utility model discloses a comparator carries out the comparison to two way complementary signals and judge to produce status signal, simultaneously through control scheme receive neutral position status signal, the redundant status signal of neutral position, reverse gear position status signal and the redundant status signal in position that reverses gear diagnose position sensor's trouble, reaches failure diagnosis's purpose.
Description
Technical field
The utility model relates to location sensing field, particularly a kind of automotive transmission gear detection sensor.
Background technique
Position transducer has and is widely used in each industrial field, such as automotive control system.Due in start stop system, need to judge neutral and position of reversing gear to make TCU judge current state time engine misses still operate to be in simultaneously and advance or reverse gear, so need relevant neutral gear position sensor and reverse gear position transducer.These sensors are installed on outside gear box casing, and are installed on gear level by sensing magnet, rotated when entering to keep off by gear level and block selecting time rectilinear movement band moving magnet, make sensor sense gear.
In prior art, separate arrangement is adopted more to arranging of sensor, by neutral gear position sensing and location sensing two independently sensor realizations of reversing gear, neutral gear position sensor is positioned at the central authorities of whole shift range, all have sensing magnetic fields to all gears, and if only if when entering neutral, and switch is just triggered; Reverse gear and maintain near sensor is positioned at and reverses gear, and if only if enters that to reverse gear be that switch is just triggered.Neutral and the position transducer that reverses gear generally all do not have Redundancy Design, and Railway Project can be caused like this to occur: client end gearbox needs to open up two regions assembling two kinds of sensors, and gear level also needs the mounting point reserving two blocks of magnet; Because system needs the signal gathering two tactility apparatus to judge gear simultaneously, if do not have Redundancy Design, when any one position sensor signal makes a mistake, system cannot normally judge, causes complete vehicle fault.
Summary of the invention
The utility model is for solving above technical problem, and one of its object provides a kind of position transducer, concrete:
A kind of position transducer, for sensing speed changer neutral gear position and position of reversing gear; The gear level of described speed changer is fixed with magnet, and described position transducer comprises:
Two-way neutral sense line, every road neutral sense line is provided with an inducting cell, and two inducting cells synchronously sense the motion of described magnet, and produce two paths of signals respectively, wherein a road signal is neutral gear position signal, and another road signal is neutral gear position redundant signals;
Two-way reverses gear sense line, and every road sense line of reversing gear is provided with an inducting cell, and two inducting cells synchronously sense the motion of described magnet, and produce two paths of signals respectively, and wherein a road signal is the position signal that reverses gear, and another road is the position redundant signals that reverses gear.
Position transducer as previously described, also comprises:
The first comparator be connected with the output of two-way neutral sense line, for comparing neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK), then export normal neutral gear position state signal (NPS ') and neutral gear position redundant state signal (NPSK ') when neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK) are normal simultaneously; Then the neutral gear position state signal (NPS ') of output abnormality and/or neutral gear position redundant state signal (NPSK ') when in neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK), at least one is abnormal;
The second comparator that the output of reversing gear sense line with two-way is connected, for comparing the position signal that reverses gear (RPS) and the position redundant signals (RPSK) that reverses gear, when the position signal that reverses gear (RPS) and the position redundant signals (RPSK) that reverses gear normal time then export the position state signal that reverses gear normally (RPS ') and the position redundant state signal that reverses gear (RPSK ') simultaneously; The then position state signal that reverses gear (RPS ') of output abnormality and/or the position redundant state signal that reverses gear (RPSK ') when in the position signal that reverses gear (RPS) and the position redundant signals (RPSK) that reverses gear, at least one is abnormal.
Position transducer as previously described, each described comparator (110,112) is to corresponding position signal (NPS, NPSK, RPS, RPSK) diagnose, whether power supply voltage is too low, when processor (106,108) power supply voltage is too low to judge corresponding processor (106,108), corresponding comparator (110,112) carries out under-voltage diagnosis, and sends power supply decompression signal or power supply input fault signal.
Position transducer as previously described, each described comparator (110,112) is to corresponding position signal (NPS, NPSK, RPS, RPSK) diagnose, judge position signal (NPS, NPSK, RPS, RPSK) whether electric current is excessive; When position signal (NPS, NPSK, RPS, RPSK) electric current is excessive, corresponding comparator (110,112) carries out short circuit diagnosis, and sends short-circuit signal.
Position transducer as previously described, each described comparator (110,112) is to corresponding position signal (NPS, NPSK, RPS, RPSK) diagnose, judge position signal (NPS, NPSK, RPS, RPSK) whether magnetic field is saturated, when position signal (NPS, NPSK, RPS, RPSK) be magnetic field saturated time, corresponding comparator (110,112) carries out internal algorithm error diagnosis, and sends magnet lossing signal.
Position transducer as previously described, each described comparator (110,112) is diagnosed corresponding position signal (NPS, NPSK, RPS, RPSK), judges whether position signal (NPS, NPSK, RPS, RPSK) loses magnetic; When position signal (NPS, NPSK, RPS, RPSK) is when losing magnetic, corresponding comparator (110,112) carries out losing magnetic diagnosis, and sends magnet lossing signal.
Position transducer as previously described, also comprises:
Control wiring, described control wiring receives the neutral gear position state signal (NPS ') that exports from described first comparator and neutral gear position redundant state signal (NPSK '); Described control wiring also receives the position signal that reverses gear (RPS ') that exports from described second comparator and the position redundant state signal that reverses gear (RPSK ');
Described control wiring, based on neutral gear position state signal (NPS '), neutral gear position redundant state signal (NPSK '), the position state signal that reverses gear (RPS ') and the position redundant state signal that reverses gear (RPSK ') four line state signals, produces and exports control signal.
Position transducer as previously described, described control wiring carries out entirety to described four line state signals and judges, and the state of neutral gear position signal (NPS) and the position signal that reverses gear (RPS) appears in instruction simultaneously.
Position transducer as previously described, when when a certain road signal in four line state signals is always high level H, other three roads signals are normal state, described control wiring judges that the fault state of position transducer is that the power supply of this road high level signal inputs or outputs short circuit or this road position signal is lost.
Position transducer as previously described, when when a certain road signal in four line state signals is always low level L, other three tunnels are normal state, recklessly control wiring judge that the fault state of position transducer (100) is always ground path or the output circuit short circuit of road low level signal.
Position transducer as previously described, when four line state signals are all always low level L signal, described control wiring judges that the fault state of position transducer is power supply input and ground circuit short circuit, power supply decompression, magnet loss or the power supply input fault of four line state signals.
Position transducer as previously described, in four line state signals, when neutral gear position state signal (NPS ') and neutral gear position redundant state signal (NPSK ') are always low level L signal simultaneously, other two-way state signals are normal, then described control wiring judges the output circuit short circuit of neutral gear position state signal (NPS ') and neutral gear position redundant state signal (NPSK '); When the position state signal that reverses gear (RPS ') and the position redundant state signal that reverses gear (RPSK ') are always low level L signal simultaneously, other two-way state signals are normal, then described control wiring judges to reverse gear the output circuit short circuit of position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear.
Position transducer as previously described, in four line state signals, when neutral gear position state signal (NPS ') and neutral gear position redundant state signal (NPSK ') two paths of signals Zhong mono-tunnel is always low level L or is always high level H signal, another road signal normal state, position state signal (RPS ') and the position redundant state signal that reverses gear (RPSK ') two paths of signals Zhong mono-tunnel of simultaneously reversing gear is always low level L or is always high level H signal, another road normal function, then described control wiring judges this two paths of signals output circuit short circuit being always low level L or being always high level H signal.
Position transducer as previously described, described control wiring is from neutral gear position state signal (NPS ') and neutral gear position redundant state signal (NPSK ') two paths of signals, or from the position state signal that reverses gear (RPS ') and the position redundant state signal that reverses gear (RPSK ') two paths of signals, select the signal of normal state to indicate operation or crippled operation as control signal.
Position transducer as previously described, described two-way neutral sense line is respectively provided with two independent 3D hall sensors, be respectively used to produce described neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK), form one group of complementary signal pair;
Described two-way sense line of reversing gear respectively is provided with two independent 3D hall sensors, and reverse gear described in being respectively used to produce position signal (RPS) and the position redundant signals (RPSK) that reverses gear, and forms one group of complementary signal pair.
Position transducer as previously described, two inducting cells in described two-way neutral sense line are positioned at the central authorities of whole shift range, all have magnetic field induction to all gears;
And if only if when gear level enters neutral shift range, and two inducting cells in described two-way neutral sense line send neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK).
Position transducer as previously described, described position transducer is integrated part.
Position transducer as previously described, described two-way neutral sense line is separate; Described two-way sense line of reversing gear is separate.
Position transducer as previously described, described position transducer is the gear detection sensor of automotive transmission.
Two of the purpose of this utility model is to provide a kind of position sensing, specifically comprises:
A kind of position sensing, comprising: position transducer as previously described, and is fixedly installed on the magnet on transmission shift lever; Inducting cell in described neutral sense line is positioned at the central authorities of whole shift range, all has magnetic field induction to all gears.
Position sensing as previously described, described magnet is integrated part.
Position transducer of the present utility model and position sensing adopt 4 independently inducting cell, two-way neutral sense line and two-way to reverse gear sense line detection of a target gear: two-way neutral sense line forms complementary signal pair, two-way sense line of reversing gear forms another road complementary signal pair, define the two paths of signals of complementary redundancy, enhance the reliability of sense line; By comparator, judgement is compared to two-way complementary signal and produce state signal, receive neutral gear position state signal, neutral gear position redundant state signal by control wiring simultaneously, reverse gear position state signal and the position redundant state signal that reverses gear to the diagnosing malfunction of position transducer, reach the object of fault diagnosis.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model position transducer.
Fig. 2 A is the operating diagram of the utility model position transducer.
Fig. 2 B is the utility model neutral gear position (redundancy) state signal generation mechanism schematic diagram.
Fig. 2 C is that the utility model reverses gear position (redundancy) state signal generation mechanism schematic diagram.
Fig. 3 is the workflow diagram of the utility model comparator.
Fig. 4 is the structural representation of the utility model position transducer with control wiring.
Embodiment
Below with reference to the accompanying drawing forming this specification part, various embodiment of the present utility model is described.It should be understood that, although use the term representing direction in the utility model, such as "front", "rear", " on ", D score, "left", "right" etc. describe various example features of the present utility model and element, but use these terms just object for convenience of description at this, determine based on the example orientations shown in accompanying drawing.Because embodiment disclosed in the utility model can be arranged according to different directions, so these represent that the term in direction just should not regard as restriction as explanation.In the conceived case, the identical or similar reference character used in the utility model refers to identical parts.
Fig. 1 is the structural representation of the utility model position transducer.
As shown in Figure 1, a kind of position transducer 100, for sensing the neutral gear position of transmission shift lever 107 and position of reversing gear.The gear level 107 of speed changer is fixed with magnet 105, and magnet 105 moves along with the motion of gear level 107, comprises rotation and straight line motion.Namely the motion that position transducer 100 senses magnet 105 reflects the motion sensing gear level 107.
Position transducer 100 comprises: two-way neutral sense line 121 and 122, every road neutral sense line 121,122 is respectively equipped with an inducting cell 101 and 102, two inducting cells 101 and 102 synchronously sense the motion of magnet 105, and produce two paths of signals respectively, wherein a road signal is neutral gear position signal NPS, and another road signal is neutral gear position redundant signals NPSK.
Also two-way reverses gear sense line 123 and 124, every road sense line 123 and 124 of reversing gear all is respectively equipped with an inducting cell 103 and 104, two inducting cells 103 and 104 synchronously sense the motion of described magnet 105, and produce two paths of signals respectively, wherein a road signal is the position signal RPS that reverses gear, and another road is the position redundant signals RPSK that reverses gear.
According in an embodiment of the present utility model, position transducer 100 comprises two-way neutral sense line, that is: the first neutral sense line 121 and the second neutral sense line 122, and two-way is reversed gear sense line, that is: the first sense line 123 and second of reversing gear is reversed gear sense line 124.Two-way neutral sense line 121 and 122 is separate, and two-way sense line 123 and 124 of reversing gear also works alone.
Position transducer 100 also comprises four inducting cells, and as embodiment, four inducting cells are respectively the first hall sensor 101, second hall sensor 102, the 3rd hall sensor 103 and the 4th hall sensor 104.First hall sensor 101 and the second hall sensor 102 are separately positioned in the first neutral sense line 121 and the second neutral sense line 122; 3rd hall sensor 103 and the 4th hall sensor 104 are separately positioned on the first sense line 123 and second of reversing gear and reverse gear in sense line 124.Two-way neutral sense line 121 and 122 is provided with first processor 106; Two-way sense line of reversing gear is provided with the second processor 108.The function module for signal transacting such as analog-to-digital conversion module is integrated with in first processor 106 and the second processor 108.Position transducer 100 is integrated part.
When magnet 105 moves (rotation, straight line motion or other motions) in gearbox along with gear level 107, there is respective change in the magnetic field (or magnetic flux) that magnet 105 produces at position transducer 100 place.Four inducting cell 101 – 104 in position transducer 100 can sense the change in the magnetic field (or magnetic flux) of magnet 105, pick up corresponding data thus produce the signal being used to indicate gear level 107 position at special time.
Fig. 2 A is the operating diagram of the utility model position transducer.
As shown in Figure 2 A, automobile gearbox comprises the R gear that reverses gear, forward gear 1,2,3,4,5,6 keeps off and neutral N gear 8 gears altogether, wherein neutral N gear is in centre, R, 1,3,5 gears in neutral side, 2,4,6 gears are at neutral opposite side and keep off aliging with 1,3,5.Gear level 107 is taken exercises along the circuit in figure shown in 211 between each gear, can be decomposed in the plane along moving back and forth of the A direction of arrow and moving back and forth of the B direction of arrow.It is be in neutral gear position that position transducer 100 senses gear level 107 along moving of the A direction of arrow always, only will produce neutral gear position signal NPS and neutral gear position redundant signals NPSK, final generation neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK '; Sensing gear level 107 moving back and forth along the B direction of arrow, finally produce neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK ' through neutral gear position, through reversing gear, position finally produces the position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear that reverses gear.
Fig. 2 B is the utility model neutral gear position (redundancy) state signal generation mechanism schematic diagram.
Concrete, as shown in Figure 2 B, ordinate X and X ' represents the displacement of gear level 107, and abscissa Y represents the level V of output signal, and figure middle polyline 201 represents neutral gear position state signal NPS ', and broken line 202 represents neutral gear position non-stateful redundant signal NPSK '.Because the first hall sensor 101 and the second hall sensor 102 independently sense magnet 105 gear level 107 from two angles, the signal level that corresponding first neutral sense line 121 and the second neutral sense line 122 produce also is different.In figure, dash area 231,232 represents that gear level 107 is at neutral gear position.When gear level 107 upside gear, do between neutral gear position and downside gear with the moving back and forth of the B direction of arrow time, the first neutral sense line 121 and the second neutral sense line 122 produce the low and high level signal producing respectively and represent neutral.Neutral gear position state signal NPS ' 201, is set to low level L at non-NULL gear, is high level H at the neutral gear position of dash area 231,232; Neutral gear position redundant state signal NPSK ' 202, is set to high level H at non-NULL gear, is low level L at the neutral gear position of dash area 231,232.
Fig. 2 C is that the utility model reverses gear position (redundancy) state signal generation mechanism schematic diagram.
As shown in Figure 2 C, abscissa X and X ' represents the displacement of gear level 107, and ordinate Y represents the level V of output signal, and figure middle polyline 203 represents the position state signal RPS ' that reverses gear, and broken line 204 represents the position redundant state signal RPSK ' that reverses gear.Because the 3rd hall sensor 103 and the 4th hall sensor 104 independently sense magnet 105 gear level 107 from two angles, so the corresponding first sense line 123 and second signal level that sense line 124 produces of reversing gear of reversing gear also is different.In figure, dash area 234 represents that gear level 107 is in position of reversing gear.When gear level 107 reverse gear to do between position and neutral gear position with the moving back and forth of the B direction of arrow time, first sense line 123 and second sense line 124 of reversing gear of reversing gear produces to produce respectively and represents the low and high level signal that reverses gear: reverse gear position state signal RPS ' 203, being low level L in non-position of reversing gear, is high level H in the position of reversing gear of dash area 234; Reverse gear position redundant state signal NPSK ' 204, is high level H in non-position of reversing gear, and is low level L in the position of reversing gear of dash area 234.
In fact: two the neutral inducting cells (as: the first hall sensor 101, second hall sensor 102) in two-way neutral sense line are positioned at the central authorities of whole shift range, all have magnetic field induction to all gears.When these two neutral inducting cells normally work, and if only if when gear level enters neutral shift range, and these two neutral sense line send neutral gear position state signal NPS ' and neutral gear position non-stateful redundant signal NPSK '.
Before generation state signal, the analog signal transmission of the reflection neutral gear position that the motion of the first hall sensor 101 and the separate sensing magnet 105 of the second hall sensor 102 produces is to first processor 106, voltage signal or pwm signal output is changed into, i.e. neutral gear position signal NPS and neutral gear position redundant signals NPSK through first processor 106 process.According in a preferred embodiment of the present utility model, the neutral gear position signal NPS of two-way independently in neutral sense line and neutral gear position redundant signals NPSK forms one group of complementary signal pair.The two paths of signals of redundancy complementation can form condition diagnosing.The reflection that the motion of the 3rd hall sensor 103 and the separate sensing magnet 105 of the 4th hall sensor 104 produces reverses gear the analog signal transmission of position to the second processor 108, change into voltage signal (or pwm signal output) through the second processor 108 process, namely reverse gear position signal RPS and the position redundant signals RPSK that reverses gear.According in a preferred embodiment of the present utility model, the position signal RPS and the position redundant signals RPSK that reverses gear that reverses gear that two-way independently reverses gear in sense line forms one group of complementary signal pair.The two paths of signals of redundancy complementation forms condition diagnosing.
Wherein, the concrete grammar cited application number of first processor 106 and the second processor 108 processing signals is the method for processor processing signals in the Chinese model utility of 201420562060.8.
Fig. 3 is the workflow diagram of the utility model comparator.
Again as shown in Figure 1, position transducer 100 also comprises comparator.Such as, two-way neutral sense line is provided with the first comparator 110; Two-way sense line of reversing gear is provided with the second comparator 112.According in an embodiment of the present utility model, the first comparator 110 is connected with the output terminal of first processor 106.Processing result, after receiving and process the neutral gear position signal NPS of voltage form and neutral gear position redundant signals NPSK that the first hall sensor 101 and the second hall sensor 102 sensing export, is sent to the first comparator 110 by first processor 106.First comparator 110 compares neutral gear position signal NPS and neutral gear position redundant signals NPSK, and produces neutral gear position state signal, as neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK '.When neutral gear position signal NPS and neutral gear position redundant signals NPSK is normal, then the first comparator 110 normally exports neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK '; Time abnormal, the first comparator 110 is the neutral gear position state signal (NPS ') of output abnormality and neutral gear position redundant state signal (NPSK ') simultaneously;
According in another embodiment of the present utility model, the second comparator 112 is connected with the output terminal of the second processor 108.Processing result, after receiving and process the position signal RPS and the position redundant signals RPSK that reverses gear that reverses gear of the voltage form of the sensing output of the 3rd hall sensor 103 and the 4th hall sensor 104, is sent to the second comparator 112 by the second processor 108.Second comparator 112 compares the position signal RPS and the position redundant signals RPSK that reverses gear that reverses gear, and produce the position state signal that reverses gear, as the position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear that reverses gear, concrete, when the second comparator 112 determine compare the position signal RPS and the position redundant signals RPSK that reverses gear that reverses gear normal time, the second comparator 112 normally exports the position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear that reverses gear; When the second comparator 112 determine compare the position signal RPS and the position redundant signals RPSK that reverses gear that reverses gear abnormal time the then position state signal that reverses gear (RPS ') of output abnormality and the position redundant state signal that reverses gear (RPSK ') simultaneously.
Comparator (i.e. the first comparator 110 and the second comparator 112) is diagnosed position signal, when comparator (110,112) decision processor (106,108) power supply voltage is too low, enter under-voltage diagnostic mode, comparator (110,112) sends power supply decompression signal, power supply input fault signal or power failure signal.
Comparator (110,112) is diagnosed position signal, when judging that position signal output port (NPS', NPSK', RPS ', RPSK ') electric current is excessive, enter short circuit diagnostic mode, comparator (110,112) sends short-circuit signal.
Comparator (110,112) is diagnosed raw magnetic gradient signal (NPS, NPSK, RPS, RPSK), when judging that raw magnetic gradient signal (NPS, NPSK, RPS, RPSK) is saturated, then enter internal algorithm error diagnosis pattern, comparator (110,112) sends magnet lossing signal.
Comparator (110,112) is diagnosed raw magnetic gradient signal (NPS, NPSK, RPS, RPSK), but judge that raw magnetic gradient signal (NPS, NPSK, RPS, RPSK) is when losing magnetic, then enter and lose magnetic diagnostic mode, comparator (110,112) sends magnet lossing signal.
Concrete diagnosis algorithm as shown in Figure 3, processes neutral gear position signal NPS for the first comparator 110 and neutral gear position redundant signals NPSK is described, and the processing mode threshold value of the second comparator 112 is identical, repeats no more.Concrete:
Step 350: position signal inputs, and namely the first comparator 110 receives neutral gear position signal NPS and neutral gear position redundant signals NPSK;
Step 351: the first comparator 110 judges first processor DSP106, and whether power supply voltage is too low, if so, then step 352; If not, then step 353;
Step 352: enter under-voltage diagnostic mode, the first comparator 110 sends under-voltage signal;
Step 353: the first comparator 110 judges status signal output mouth NPS', and whether NPSK' electric current is excessive, if so, then step 354, if not, then step 355;
Step 354: enter short circuit diagnostic mode, the first comparator 110 sends short-circuit signal;
Step 355: the first comparator 110 judges raw magnetic gradient signal NPS, and whether NPSK is saturated, if so, then step 356; If not, then step 357;
Step 356: enter internal algorithm error diagnosis pattern, the first comparator 110 sends internal algorithm error signal;
Step 357: the first comparator 110 judges raw magnetic gradient signal NPS, and whether NPSK loses magnetic, if so, then step 358; If not, then step 359;
Step 358: enter and lose magnetic diagnostic mode, the first comparator 110 sends loses magnetic signal;
Step 359, output status signal, namely exports normal neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK '.
It should be noted that: above-mentioned under-voltage signal, short-circuit signal, internal algorithm error signal, to lose the abnormal signals such as magnetic signal be all represent with the pwm signal of different duty, such as represent with the pwm signal of 5% dutycycle, normal state signal then represents with low and high level.
Fig. 4 is the structural representation of the utility model position transducer with control wiring.
Position transducer 100 also can comprise control wiring 415, and control wiring 415 connects the output of the first comparator 110 and the second comparator 112.In an embodiment as shown in Figure 4, control wiring 415 receives the neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK ' that the first comparator 110 sends, with the position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear that reverses gear that the second comparator 112 sends, and the first comparator 110 and the second comparator 112 send lose the signals such as magnetic diagnosis, CRC diagnosis.Control wiring 415 to the neutral gear position state signal NPS ' received, neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear, and carries out fault diagnosis to the state 100 of position transducer.
Concrete diagnostic analysis is in table 1: fault diagnosis state table.
table 1: fault diagnosis state table
Various fault status signals in table 1 are produced by two comparators, and the different conditions of neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear inputs to control wiring 415.H is that voltage is always high level (abnormal signal), L is that voltage is always low level (abnormal signal), and normal function is then for signal can normal variation; Vsup is power input line road; GND is ground path; Output is output signal.
As can be seen from Table 1, corresponding different failure causes, first comparator 110 and the second comparator 112 can produce neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', the different output state of reverse gear position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear, as: L or H.The output state different according to four line state signals can judge the failure cause of position transducer 100, reaches the object of diagnosis.
Concrete: 1) neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and reverse gear in the signal of redundant state signal RPSK ' four road, position, when when a certain road signal is always high level H, other three tunnels are normal function, then control wiring 415 judges that the fault state of position transducer 100 is that the power supply of this road high level signal inputs or outputs short circuit or this road position signal is lost, such as, in table 1 the 2nd, 3,4,5,20,21,22,23 8 kind of failure situations.
2) neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and reverse gear in the signal of redundant state signal RPSK ' four road, position, when when a certain road signal is always low level L, other three tunnels are normal signal, control wiring 415 judges that the fault state of position transducer 100 is ground path or the output circuit short circuit of this road low level signal, such as, in table 1 the 6th, 7,8,9 four kind of failure situations.
3) when neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and redundant state signal RPSK ' four road, the position signal that reverses gear all are always low level L signal, control wiring 415 judges that the fault state of position transducer 100 is power supply input and ground circuit short circuit, power supply decompression, magnet loss or the power supply input fault of four road signals, such as, in table 1 the 1st, 16,17,18 4 kind of failure situations.
4) neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and reverse gear in the signal of redundant state signal RPSK ' four road, position, when neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK ' is always low level L signal simultaneously, then judge the output circuit short circuit of neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK '; When reversing gear, position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear is always low level L signal simultaneously, then judge to reverse gear the output circuit short circuit of position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear, such as, in table 1 the 10th, the situation that represents respectively of 11 two kind of fault state.
5) neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and reverse gear in the signal of redundant state signal RPSK ' four road, position, when neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK ' two paths of signals Zhong mono-tunnel are always low level L or are always high level H signal (another road normal function), simultaneously reverse gear position state signal RPS ' and redundant state signal RPSK ' two paths of signals Zhong mono-tunnel, position of reversing gear is always low level L or is always high level H signal (another road normal function), then judge this two paths of signals output circuit short circuit being always low level L or being always high level H signal, such as, in table 1 the 12nd, 13, 14, the situation that 15 4 kinds of fault states represent respectively.
In addition, in another embodiment of the present utility model, control wiring 415 also can to from the first comparator 110 and the second comparator 112 4 road signal (that is: neutral gear position state signal NPS ', neutral gear position redundant state signal NPSK ', reverse gear position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear) entirety carry out correction judgement.Such as, when neutral gear position state signal NPS ' and neutral gear position redundant state signal NPSK ' all indicates current location to be in neutral, and the position state signal RPS ' and the position redundant state signal RPSK ' that reverses gear that reverses gear all indicates current location to be in when reversing gear, the first comparator 110 and the second comparator 112 export the four line state signals of " normal function " respectively.Now, control wiring 415 still can carry out entirety to this four line states signal and judge, and exports the current abnormal state of corresponding diagnostic signal prompt system end, namely occurs neutral gear position signal NPS and the mistake of the position signal RPS that reverses gear simultaneously.
Position transducer 100 break down above-mentioned fault time, control wiring 415 failure judgement type, and send corresponding warning to operator, or select the signal of normal functional state to manipulate automobile instruction to run or crippled operation.Control wiring 415 is integrated in automobile control chip TCU.
Although will be described the utility model with reference to the embodiment shown in accompanying drawing, should be appreciated that position transducer of the present utility model can have many versions under the spirit and scope not deviating from the utility model instruction and background.Art technology those of ordinary skill also has different modes to change the parameter in embodiment disclosed in the utility model by recognizing, the such as type of size, shape or element or material, all falls in the spirit and scope of the utility model claim.
Claims (21)
1. a position transducer (100), for sensing speed changer neutral gear position and position of reversing gear; The gear level (107) of described speed changer is fixed with magnet (105); It is characterized in that, described position transducer (100) comprising:
Two-way neutral sense line, every road neutral sense line is provided with an inducting cell, and two inducting cells synchronously sense the motion of described magnet (105), and produce two paths of signals respectively, wherein a road signal is neutral gear position signal, and another road signal is neutral gear position redundant signals;
Two-way reverses gear sense line, every road sense line of reversing gear is provided with an inducting cell, and two inducting cells synchronously sense the motion of described magnet (105), and produce two paths of signals respectively, wherein a road signal is the position signal that reverses gear, and another road is the position redundant signals that reverses gear.
2. position transducer (100) as claimed in claim 1, characterized by further comprising:
The first comparator (110) be connected with the output of two-way neutral sense line, for comparing neutral gear position signal and neutral gear position redundant signals, when neutral gear position signal and neutral gear position redundant signals normal time then export normal neutral gear position state signal and neutral gear position redundant state signal simultaneously; Then the neutral gear position state signal of output abnormality and/or neutral gear position redundant state letter when in neutral gear position signal and neutral gear position redundant signals, at least one is abnormal;
The second comparator (112) that the output of reversing gear sense line with two-way is connected, for comparing reverse gear position signal and the position redundant signals that reverses gear, then export when the position signal that reverses gear is normal with the position redundant signals that reverses gear reverse gear normally position state signal and the position redundant state signal that reverses gear simultaneously; Reverse gear position state signal and/or the position redundant state signal that reverses gear of then output abnormality when reversing gear position signal and reversing gear that at least one is abnormal in the redundant signals of position.
3. position transducer (100) as claimed in claim 2, is characterized in that:
Each described comparator (110,112) is diagnosed corresponding position signal, whether power supply voltage is too low to judge corresponding processor (106,108), when processor (106,108) power supply voltage is too low, corresponding comparator (110,112) carries out under-voltage diagnosis, and sends power supply decompression signal or power supply input fault signal.
4. position transducer (100) as claimed in claim 3, is characterized in that:
Each described comparator (110,112) is diagnosed corresponding position signal, and whether electric current is excessive to judge position signal; When position signal electric current is excessive, corresponding comparator (110,112) carries out short circuit diagnosis, and sends short-circuit signal.
5. position transducer (100) as claimed in claim 4, is characterized in that:
Each described comparator (110,112) is diagnosed corresponding position signal, whether magnetic field is saturated to judge position signal, when position signal be magnetic field saturated time, corresponding comparator (110,112) carries out internal algorithm error diagnosis, and sends magnet lossing signal.
6. position transducer (100) as claimed in claim 5, is characterized in that:
Each described comparator (110,112) is diagnosed corresponding position signal, judges whether position signal loses magnetic; When position signal is when losing magnetic, corresponding comparator (110,112) carries out losing magnetic diagnosis, and sends magnet lossing signal.
7. the position transducer (100) as described in claim as arbitrary in claim 2-6, is characterized in that, also comprise:
Control wiring (415), described control wiring (415) receives the neutral gear position state signal and neutral gear position redundant state signal that export from described first comparator (110); Described control wiring (415) also receives reverse gear position signal and the position redundant state signal that reverses gear that export from described second comparator (112);
Described control wiring (415) based on neutral gear position state signal, neutral gear position redundant state signal, reverse gear position state signal and the position redundant state signal four line state signal that reverses gear, produce and export control signal.
8. position transducer (100) as claimed in claim 7, is characterized in that:
Described control wiring (415) carries out entirety to described four line state signals and judges, and neutral gear position signal appears in instruction simultaneously and the state of the position signal that reverses gear.
9. position transducer (100) as claimed in claim 7, is characterized in that:
When a certain road signal in four line state signals is always high level H, other three roads signals are normal state, described control wiring (415) judges that the fault state of position transducer (100) is that the power supply of this road high level signal inputs or outputs short circuit or this road position signal is lost.
10. position transducer (100) as claimed in claim 7, is characterized in that:
When a certain road signal in four line state signals for be always low level L and other three tunnels are normal state time, described control wiring (415) judges that the fault state of position transducer (100) is ground path or the output circuit short circuit that this road is always low level signal.
11. position transducers (100) as claimed in claim 7, is characterized in that:
When four line state signals are all always low level L signal, described control wiring (415) judges that the fault state of position transducer (100) is power supply input and ground circuit short circuit, power supply decompression, magnet loss or the power supply input fault of four line state signals.
12. position transducers (100) as claimed in claim 7, is characterized in that:
In four line state signals, when neutral gear position state signal and neutral gear position redundant state signal are always low level L signal simultaneously, other two-way state signals are normal, then described control wiring (415) judges the output circuit short circuit of neutral gear position state signal and neutral gear position redundant state signal; When reversing gear, position state signal is always low level L signal with the position redundant state signal that reverses gear simultaneously, other two-way state signals are normal, then described control wiring (415) judges to reverse gear the output circuit short circuit of position state signal and the position redundant state signal that reverses gear.
13. position transducers (100) as claimed in claim 7, is characterized in that:
In four line state signals, when neutral gear position state signal and neutral gear position redundant state signal two paths of signals Zhong mono-tunnel are always low level L or are always high level H signal, another road signal normal state, the position state signal that simultaneously reverses gear is always low level L with redundant state signal two paths of signals Zhong mono-tunnel, position of reversing gear or is always high level H signal, another road normal function, then described control wiring (415) judges this two paths of signals output circuit short circuit being always low level L or being always high level H signal.
14. position transducers (100) as claimed in claim 7, is characterized in that:
Described control wiring (415) is from neutral gear position state signal and neutral gear position redundant state signal two paths of signals, or from reversing gear position state signal and reverse gear the redundant state signal two paths of signals of position, select the signal of normal state to indicate operation or crippled operation as control signal.
15. position transducers (100) as claimed in claim 1, is characterized in that:
Described two-way neutral sense line is respectively provided with two independent 3D hall sensors, is respectively used to produce described neutral gear position signal and neutral gear position redundant signals, forms one group of complementary signal pair;
Described two-way sense line of reversing gear respectively is provided with two independent 3D hall sensors, and reverse gear described in being respectively used to produce position signal and the position redundant signals that reverses gear, and forms one group of complementary signal pair.
16. position transducers (100) as claimed in claim 1, is characterized in that:
Two inducting cells in described two-way neutral sense line are positioned at the central authorities of whole shift range, all have magnetic field induction to all gears;
And if only if when gear level (107) enters neutral shift range, and two inducting cells in described two-way neutral sense line send neutral gear position signal and neutral gear position redundant signals.
17. position transducers (100) as claimed in claim 1, is characterized in that:
Described position transducer (100) is integrated part.
18. position transducers (100) as claimed in claim 1, is characterized in that:
Described two-way neutral sense line is separate;
Described two-way sense line of reversing gear is separate.
19. position transducers (100) as claimed in claim 1, is characterized in that:
The gear detection sensor that described position transducer (100) is automotive transmission.
20. 1 kinds of position sensings, it is characterized in that comprising: the position transducer (100) any one of claim 1 to 19 as described in claim, and be fixedly installed on the magnet (105) on transmission shift lever (107); Inducting cell in described neutral sense line is positioned at the central authorities of whole shift range, all has magnetic field induction to all gears.
21. position sensings as claimed in claim 20, is characterized in that: described magnet (105) is integrated part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443698.4U CN204921962U (en) | 2015-06-25 | 2015-06-25 | Position sensor and position sensing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443698.4U CN204921962U (en) | 2015-06-25 | 2015-06-25 | Position sensor and position sensing system |
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| CN204921962U true CN204921962U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520443698.4U Withdrawn - After Issue CN204921962U (en) | 2015-06-25 | 2015-06-25 | Position sensor and position sensing system |
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| CN (1) | CN204921962U (en) |
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| CN105952889A (en) * | 2016-06-28 | 2016-09-21 | 广州汽车集团股份有限公司 | Gear switching signal acquisition device, method thereof, automobile gear-shifting system and automobile |
| CN106321819A (en) * | 2015-06-25 | 2017-01-11 | 泰科电子(上海)有限公司 | Position sensor and position sensing system |
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| CN106763723A (en) * | 2017-01-18 | 2017-05-31 | 广州汽车集团股份有限公司 | Line traffic control selector gear self-learning method, system and line traffic control selector system |
| CN108692000A (en) * | 2017-03-30 | 2018-10-23 | 本田技研工业株式会社 | The setting method and fluid pressure control circuit of actuator |
| US10584725B2 (en) | 2017-03-30 | 2020-03-10 | Honda Motor Co., Ltd. | Method of setting actuator and fluid pressure control circuit |
| CN108692000B (en) * | 2017-03-30 | 2020-06-16 | 本田技研工业株式会社 | Method for setting actuator and fluid pressure control circuit |
| CN107725759A (en) * | 2017-09-27 | 2018-02-23 | 宁波鹏程拉索有限公司 | A kind of selector complementation redundancy structure |
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