CN106870727A - A kind of sensing system - Google Patents

A kind of sensing system Download PDF

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Publication number
CN106870727A
CN106870727A CN201510909179.7A CN201510909179A CN106870727A CN 106870727 A CN106870727 A CN 106870727A CN 201510909179 A CN201510909179 A CN 201510909179A CN 106870727 A CN106870727 A CN 106870727A
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CN
China
Prior art keywords
gear
neutral
magnet
sensing
signal
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CN201510909179.7A
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Chinese (zh)
Inventor
戴德明
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Tyco Electronics Technology Suzhou Industrial Park Co Ltd
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Tyco Electronics Technology Suzhou Industrial Park Co Ltd
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Application filed by Tyco Electronics Technology Suzhou Industrial Park Co Ltd filed Critical Tyco Electronics Technology Suzhou Industrial Park Co Ltd
Priority to CN201510909179.7A priority Critical patent/CN106870727A/en
Publication of CN106870727A publication Critical patent/CN106870727A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/42Ratio indicator devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques

Abstract

A kind of sensing system, for the neutral gear position for sensing shift of transmission axle and position of reversing gear;Sensing system includes sensor and magnet arrangement, and magnet arrangement is arranged on the shifting shaft of speed changer, is neutral magnet and the magnet that reverses gear;Neutral magnet and the magnet that reverses gear produce the neutral gear position of correspondence shifting shaft and the magnetic field signal of position of reversing gear respectively;The magnetic field signal of neutral gear position has opposite distribution arrangement with the magnetic field signal of position of reversing gear;Sensor includes neutral sense line and sense line of reversing gear, and is each provided with the magnetic field signal of sensing element, sensing element sensing neutral magnet and magnet movement of reversing gear, and the signal of reaction neutral gear position and position of reversing gear is produced respectively.Inventive sensor system is using multiple switch hall sensing unit as sensing element, two movements of magnet arrangement of independent sensing, two pieces of T-shaped layouts of the magnet that magnetic is smaller and magnetic direction is opposite, meet outside sensing is required and also reduce interference of the magnet arrangement to other electronic devices.

Description

A kind of sensing system
Technical field
The present invention relates to field of automobile control, more particularly to a kind of neutral based on Hall switch inductor/reverse gear position sensor.
Background technology
Current position sensor has and has been widely used in each industrial circle, such as automotive control system.Due to needing to judge neutral gear position in start stop system and reversing gear position to make ECU (Electronic Control Unit, electronic control unit, also known as " car running computer ", " vehicle-mounted computer " etc.) when judging current state engine misses still operate and meanwhile be will be in advancing or reverse gear, so needing that related neutral/reverse gear position sensor.These sensors are installed on gearbox, and will be sensed and be installed on magnet in shifting shaft rotating shaft, rotated when entering and keeping off by shifting shaft and straight line (or rotation) moving belt moving magnet during block selecting makes sensor sense gear.
In the prior art, a monoblock magnet is set on shifting shaft more to reflect the motion of shifting shaft, the magnet is sensed using 3D hall sensors more than inductor.Using monoblock magnet when need the magnet magnetic all gears that could cover shifting shaft very high in itself, but this ferromagnetic magnet can produce influence to other periphery electric elements.
The content of the invention
Present invention above technical problem to be solved, there is provided it is sensing element that one kind uses switch Hall, and uses two blocks of magnet as the sensing system of magnet arrangement, and concrete technical scheme is as follows:
A kind of sensing system, for the neutral gear position for sensing shift of transmission axle and position of reversing gear;The sensing system includes sensor and magnet arrangement, and the magnet arrangement is arranged on the shifting shaft of speed changer;
The magnet arrangement is neutral magnet and the magnet that reverses gear;The neutral magnet produces the magnetic field signal of the neutral gear position of correspondence shifting shaft, the magnet that reverses gear to produce the magnetic field signal of the position of reversing gear of correspondence shifting shaft;The magnetic field signal of the neutral gear position has opposite distribution arrangement with the magnetic field signal of the position of reversing gear;
The sensor includes:
Neutral sense line, is provided with sensing element, and the sensing element senses the magnetic field signal of the neutral magnet movement, produces the signal of reaction neutral gear position;
Reverse gear sense line, be provided with sensing element, the magnetic field signal of the sensing element sensing magnet movement of reversing gear produces the signal for reacting position of reversing gear.
Sensing system as previously described, the neutral magnet is set along the axis direction of the shifting shaft, the axis horizontally set of the magnet along the shifting shaft that reverse gear.
Sensing system as previously described, the neutral magnet is elongated in shape with the magnet that reverses gear.
Sensing system as previously described, the width of the neutral magnet is 3~7mm, is particularly 3~5mm or 4~6mm.
Sensing system as previously described, the width of the neutral magnet is specifically as follows 3mm, 3.5mm, 4mm, 4.5mm or 5mm.
Sensing system as previously described, the neutral magnet and magnet interval setting of reversing gear.
Sensing system as previously described, also including magnet carrier;
The neutral magnet is fixedly installed in the magnet carrier with the magnet that reverses gear, and forms integral piece.
Sensing system as previously described, the neutral sense line is two-way, a sensing element is provided with per road neutral sense line, two sensing elements synchronously sense the motion of the neutral magnet, and two paths of signals is produced respectively, wherein signal is neutral gear position signal all the way, and another road signal is neutral gear position redundant signals;
The sense line of reversing gear is for two-way, sense line of being reversed gear per road is provided with a sensing element, and two sensing elements synchronously reverse gear described in sensing the motion of magnet, and produce two paths of signals respectively, wherein signal is the position signalling that reverses gear all the way, and another road signal is the position redundant signals that reverse gear.
Sensing system as previously described, each neutral sense line and sense line of reversing gear include process circuit, and process circuit connects the sensing element, the output valve W for receiving the changes of magnetic field obtained by the sensing element sensing magnet arrangement.
Sensing system as previously described, the process circuit includes memory and processor;
The memory, measures what is obtained for storing the sensing element in simulation program, and the analog output value W of each gear positions is in corresponding to the shifting shaft0
The processor, is provided with two inputs, and one end connects the memory, receives the analog output value W0;Another input connects the sensing element, receives the output valve W of sensing element;The processor compares the output valve W and analog output value W0, and send the position signalling that the sensing element is measured, or non-location signal.
Sensing system as previously described, the analog output value Ws of the real-time output valve W less than corresponding neutral gear position of two sensing elements in the two-way neutral sense lineNWhen, the process circuit in the neutral sense line is emitted in gear position signalling.
Sensing system as previously described, the analog output value Ws of the real-time output valve W more than or equal to corresponding neutral gear position of two sensing elements in the two-way neutral sense lineNWhen, the process circuit in the neutral sense line sends neutral gear position signal.
Sensing system as previously described, when the shifting shaft reverses gear scope and when not entering to keep off into neutral and entering, the two-way neutral sense line sends neutral gear position signal;The sense line of reversing gear sends the position signalling that reverses gear;
The neutral gear position signal priority is designated as neutral gear position in the position signalling that reverses gear.
Sensing system as previously described, the real-time output valve W of the described two sensing elements in the two-way the reverses gear sense line and analog output value W of corresponding position of reversing gearRDuring for certain difference or certain proportion, the process circuit in the sense line of reversing gear sends the position signalling that reverses gear in advance.
Sensing system as previously described, described neutral gear position signal and neutral gear position redundant signals form one group of complementary signal pair;
Described reverse gear position signalling and the position redundant signals one group of complementary signal pair of formation that reverses gear.
The level of sensing system as previously described, the neutral gear position signal and neutral gear position redundant signals is opposite:When neutral gear position signal is high level, neutral gear position redundant signals are low level;When neutral gear position signal is low level, neutral gear position redundant signals are high level.
Sensing system as previously described, the position signalling that reverses gear is opposite with the level of the position redundant signals that reverse gear:When the position signalling that reverses gear is for high level, the position redundant signals that reverse gear are low level;When the position signalling that reverses gear is for low level, the position redundant signals that reverse gear are high level.
Sensing system as previously described, the sensing element is switch Hall element, and described its operating voltage of switch Hall element is 5V-12V.
Sensing system as previously described, the neutral gear position of the two sensing elements whole shift range of correspondence in the two-way neutral sense line is set;When and if only if shifting shaft enters neutral shift range, the two-way neutral sense line sends neutral gear position signal and neutral gear position redundant signals.
Sensing system as previously described, two sensing elements correspondence that the two-way reverses gear in sense line is reversed gear position setting;And if only if shifting shaft enters when reversing gear scope, and two-way sense line of reversing gear sends reverse gear position signalling and the position redundant signals that reverse gear.
Sensing system as previously described, the gearbox that the sensor is applied to is manual-gear vehicle, and gear is set for 8 gears, and 6 forward range point both sides are symmetrical arranged per side 3 along neutral gear, and the gear that reverses gear is asymmetric to be located at neutral gear side.
Sensing system as previously described, the gearbox that the sensor is applied to is manual-gear vehicle, wherein, the gear that reverses gear is axially located all gear one end along shifting shaft, and is set in shifting shaft axially spaced-apart with forward range.
Sensing system as previously described, the two-way neutral sense line is separate;Two-way sense line of reversing gear is separate.
The sensor is integrated part.
Using 4 switch Hall sensing units as sensing device, independent sensing two senses the movement of shifting shaft to inventive sensor system into T-shaped layout and the opposite magnet arrangement of magnetic direction, and produces the position signalling of two-way independence.The operating voltage of switch Hall is 5V-12V, and voltage range is wider, it is not necessary to additional voltage-stablizer;And the volume of switch Hall sensing element is smaller, the only a quarter of 3D hall sensings element more saves the space of automobile gearbox;Using two pieces of T-shaped layouts of the magnet that magnetic is smaller and magnetic direction is opposite, meet outside sensing is required and also reduce interference of the magnet arrangement to other electronic devices.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of inventive sensor system;
Fig. 2 is the electrical block diagram of inventive sensor system;
Fig. 3 is the internal structure schematic diagram of processor in inventive sensor system;
Fig. 4 is that shifting shaft of the present invention moves route schematic diagram;
Fig. 5 is the signal output schematic diagram of neutral gear position signal NPS of the present invention and neutral gear position redundant signals NPSK;
Fig. 6 is that the present invention is reversed gear the signal output schematic diagram of position signalling RPS and the position redundant signals RPSK that reverses gear;And
Fig. 7 is the magnetic field value output signal comparison diagram of slender type magnet arrangement of the present invention and roomy type magnet arrangement.
Specific embodiment
Various specific embodiments of the invention are described below with reference to the accompanying drawing for constituting this specification part.It should be understood that, although using the term for representing direction in the present invention, "front", "rear", " on ", D score, the description such as "left", "right" various example features of the invention and element, but these terms purpose merely for convenience of description is used herein, is determined based on the example orientations shown in accompanying drawing.Because disclosed embodiment of this invention can be set according to different directions, so these represent that the term in direction is intended only as illustrating and should not be considered as limitation.In the conceived case, the identical or similar reference for being used in the present invention refers to identical part.
Fig. 1 is the dimensional structure diagram of inventive sensor system.
As shown in Figure 1, sensing system includes the magnet arrangement 105 of the motion of correspondence automobile gearbox shifting shaft 101, and the sensor 100 of sensing magnet arrangement motion, sensor 100 includes that two-way neutral gear position signal sensing circuit and two-way reverse gear position signalling sense line.Magnet arrangement 105 is arranged on shifting shaft 101 and is moved with shifting shaft 101.Shifting shaft 101 can do back and forth or round linear motion (arrow AA ' directions in figure) along axis H-H ', it is also possible to along the transverse direction of axis B with axis H-H ' for the center of circle is done back and forth or round rotary motion (arrow BB ' directions in figure).
105 two blocks of magnet of magnet arrangement, respectively including for reflecting shifting shaft 101 in the neutral magnet 1052 of neutral gear position and for reflecting reverse gear magnet 1053 of the shifting shaft 101 in position of reversing gear, neutral magnet 1052 and the T-shaped layout of magnet 1053 of reversing gear:Neutral magnet 1052 is set along the axis direction of shifting shaft 101, the magnet 1053 that reverses gear is circular arc, along the axis horizontally set of shifting shaft 101, and neutral magnet 1052 is opposite with the pole orientation of the magnet 1053 that reverses gear, the N of neutral magnet 1052 extremely upward, S are extremely downward, and the N extremely downward, S of the magnet 1053 that reverses gear are extremely upward;Equally, each magnetic is reversed and can also reach effect same for two blocks of magnet.The length of neutral magnet 1052 is enough to be covered in the effective search coverage of length of the rectilinear movement of shifting shaft 101, the radian span of magnet 1053 of reversing gear is enough to be covered in the effective search coverage in rotary moving of shifting shaft 101, and neutral magnet 1052 and the magnet 1053 that reverses gear follow shifting shaft 101 to do straight line and rotary motion.
Two-way neutral sense line and reverse gear sense line, respectively two-way neutral sense line (112,114) and two-way reverses gear sense line (116,118).Sense line includes multiple sensing elements and sensing signal is provided separately, and the sensing element of the motion of sensing neutral magnet 1052 is respectively switch Hall sensing element side by side:Neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ', it is arranged on the top (or neighbouring position) of neutral magnet 1052, when neutral magnet 1052 moves to the region of neutral gear position signal sensing element 104 and the sensing of neutral gear position redundant signals sensing element 104 ', and sense the change in the magnetic field (or magnetic flux) of neutral magnet 1052, corresponding data are picked up in special time, and magnetic induction intensity (line of magnetic induction) is when reaching certain value, neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ' can send neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK) to neutral sense line 112 and neutral redundancy sense line 114 respectively.Similarly, the reverse gear sensing element of magnet 1052 of sensing is respectively switch Hall sensing element side by side:Reverse gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear, the top (or neighbouring position) of the magnet 1053 that reverses gear is arranged on simultaneously, when the magnet 1053 that reverses gear moves to the sensing region of reverse gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear, and sense the change in the magnetic field (or magnetic flux) of the magnet 1053 that reverses gear, corresponding data are picked up in special time, and magnetic induction intensity (line of magnetic induction) is when reaching certain value, reversing gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear can be to reversing gear sense line 116 and redundancy sense line 118 of reversing gear send the position signalling that reverses gear (RPS) and the position redundant signals (RPSK) that reverse gear.
Sensing element of the invention (neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ', reverse gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear) uses switch Hall sensing element, the operating voltage of switch Hall sensing element is 5V-12V, voltage range is wider, additional voltage-stablizer is not needed, it is cost-effective;And the volume of switch Hall sensing element is smaller, the only a quarter of 3D hall sensings element more saves the space of automobile gearbox.
In Fig. 1, neutral magnet 1052 of the invention and reverse gear magnet 1053, neutral magnet 1052 and the magnet 1053 that reverses gear, spaced between the two and T-shaped layout are arranged in magnet carrier 160 and form integral piece.Wherein, neutral magnet 1052 is set along the axis direction of shifting shaft 101, the magnet 1053 that reverses gear is circular arc, along the axis horizontally set of shifting shaft 101, and the pole orientation of neutral magnet 1052 and the magnet 1053 that reverses gear is conversely, this set is so that the Distribution of Magnetic Field direction that neutral magnet 1052 and the magnet 1053 that reverses gear are produced is also opposite.It is this to cause that neutral magnet 1052 be superimposed in one direction with the magnetic field signal distribution of the magnet 1053 that reverses gear into the design that magnetic direction staggers, neutral sensing element and reverse gear each self-inductance measurement neutral magnet 1052 of sensing element and the magnet 1053 that reverses gear, two magnetic fields of magnet will not interfere.In addition, the switch Hall inductor that the present invention is used is needed in the jump position obvious Distribution of Magnetic Field of magnetic field value size variation, if magnetic field superposition can cause that jump position magnetic field intensity is increased, magnetic field value size variation is not obvious, the sensitivity of the sensing of sensing element can be reduced, and be specifically shown in Fig. 7.
Fig. 2 is the electrical block diagram of inventive sensor system;
It is illustrated in figure 2 the two-way neutral sense line of sensing system and the basic circuit structure of sense line of reversing gear, neutral sense line 112 and neutral redundancy sense line 114 receive the neutral gear position signal that neutral gear position signal sensing element 104 and the sensing magnetic field size of neutral gear position redundant signals sensing element 104 ' are produced, the neutral gear position signal of sensing element sensing is linear analog signal, sense line is provided with process circuit 130 (see Fig. 3) and carries out the Treatment Analysis such as digital-to-analogue conversion to signal, the neutral gear position signal NPS and neutral gear position redundant signals NPSK of the digital form that Treatment Analysis are obtained are sent to protection circuit 120, the neutral gear position signal NPS and neutral gear position redundant signals NPSK that protection circuit 120 will be handled well start to automotive control system.
The signal processing mode of sense line of reversing gear 116 and redundancy sense line 118 of reversing gear is identical with neutral sense line neutral sense line 112 and neutral redundancy sense line 114.The internal structure and handling process of wherein process circuit 130 are specifically shown in Fig. 3.
Fig. 3 is the internal structure schematic diagram of processor in inventive sensor system;
Neutral sense line 112 and neutral redundancy sense line 114, sense line of reversing gear 116 and this four routes road of redundancy sense line 118 of reversing gear all are independent operatings, and identical processor (process circuit) structure is designed with every route road.It is explained by taking neutral sense line 112 as an example, as shown in Figure 3:Memory 131, processor 132, A/D change-over circuits 134 etc. are provided with process circuit 130.Sensing element being previously stored with memory 131 and measuring what is obtained in simulation program, analog output value W during neutral gear position is in corresponding to shifting shaft 1010(threshold value of correspondence magnetic field size);Processor 132 is provided with two inputs:Input 133 and input 135, and an output end 137.Input 133 connects memory 131, receives analog output value W0;The connection of input 135 A/D change-over circuits 134, A/D change-over circuits 134 receive the output valve W of sensing element 104, and the output valve W of analog signal is converted into processor 132 is capable of identify that the data signal that uses.
Processor 132 compares real-time output valve W and analog output value W0, when real-time output valve W exceedes the analog output value W of neutral gear position0When, processor 132 sends the position signalling (high level signal) of neutral by output end 137;It is less than as real-time output valve W or no more than analog output value W0When, processor 132 sends non-NULL and keeps off position signalling (low level signal) (being specifically shown in Fig. 5-6).
In fact; neutral redundancy sense line 114, sense line of reversing gear 116 and redundancy sense line 118 of reversing gear are used and the identical mode of neutral sense line 112 in the processing mode of signal; its respective output end (147,157,167) is all output a signal in protection circuit 120, and automotive control system ECU is sent to by protection circuit 120.Wherein, the specific method of the process signal of processor 132 can be the method for processor process signal in 201420562060.8 Chinese utility model with cited application number.
Fig. 4 is that shifting shaft of the present invention moves route schematic diagram.
As shown in Figure 4, automobile gearbox has 8 gears altogether (in fact including the R gears that reverse gear, the gear of forward gear 1,2,3,4,5,6 and neutral N gears, the setting of other more gears can also use sensor of the invention system), wherein neutral N gears are moved in centre along path 211, the gear of R, 1,3,5 aligns in neutral side, 2,4,6 gears in neutral opposite side and with 1,3,5 gears.The gear level of automobile is stirred so that circuit of the shifting shaft 101 between each gear along figure shown in arrow is taken exercises, can be decomposed into the plane along moving back and forth for the A directions of arrow and moving back and forth for the B directions of arrow.
Dash area 221 represents neutral gear position scope, such as scope when rotational steps of shifting shaft 101 are ± 5 ° in figure;The both sides of dash area 221 are position range of putting into gear, and represent that shifting shaft 101 is rotated to and reverse gear on R or forward range, such as the scope when rotational steps of shifting shaft 101 are ± 20 °.Dash area 222 represents the axial location that reverses gear, and represents that shifting shaft 101 is linearly moved to the side of the gear that reverses gear, including position of reversing gear neutral gear position adjacent thereto;The right side of dash area 222 is forward gear axial location, represents that shifting shaft 101 is linearly moved to the side of forward gear gear.
Neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ' can be with sensing gearbox shifting axles 101 in the position of each gear.Gear scope of putting into gear is entered laterally when shifting shaft 101 rotates, that is when gear R or forward gear gear (including gear 1, gear 2, gear 3, gear 4, gear 5 and gear 6), neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ' produce non-NULL gear position signalling;When shifting shaft 101 enters laterally neutral gear position scope (shadow region 221), neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ' produce neutral gear position signal NPS and neutral gear position redundant signals NPSK.
When shifting shaft 101 enters the axial location that reverses gear (shadow region 222) at end of reversing gear along axis 211 with A directions of arrow linear motion, reverse gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear produces the position signalling RPS and position redundant signals RPSK that reverses gear that reverses gear, when the rectilinear movement of shifting shaft 101 enters the forward gear axial location of forward gear side:Including gear 1, gear 2, gear 3, gear 4, gear 5, gear 6 and the adjacent neutral N1 of homonymy, neutral N2 and neutral N3, reverse gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear produces the non-position signalling that reverses gear.
Particularly, automotive control system ECU needs anticipation in advance to the sensing of position of reversing gear so that shifting shaft 101 is reached before reversing gear, and so that automotive control system needs the control hydraulic system oil circuit that will reverse gear to be switched on, driving wheel reversion, realization is reversed gear traveling.Sense line of reversing gear 116 and the memory storage reversed gear in redundancy sense line 118 are reversed gear position analog output value WR, as the real-time output valve W and analog output value W of position of reversing gearRDuring for certain difference or certain proportion (such as 1/3), that is R ' the points position in Fig. 4 on neutral movement line 211, reverse gear sense line 116 and the redundancy sense line 118 of reversing gear send the position signalling that reverses gear (or the position signalling that reverses gear in advance) to ECU in advance, and ECU can make a response in advance.Because when shifting shaft 101 is moved to reverses gear mono- side positions of R, there is no other gears to move in addition to the R that reverses gear on the route, naturally it is also possible to return to 1 gear along neutral gear position or 2 gears are put, or rest on neutral.In fact, judging whether shifting shaft 101 is actually entered when reversing gear position or resting on neutral gear position, judgment mode is:Position signalling (entering to keep off position signalling) is kept off when neutral sense line (or neutral redundancy sense line) is shown as non-NULL, and sense line of reversing gear (or redundancy sense line of reversing gear) be shown as reversing gear position signalling RPS (or RPSK) when, system is that can determine whether that shifting shaft 101 only can be in reversing gear position R.Control automobile is carried out car backing operation by automotive control system ECU.
If resting on neutral gear position (position that dash area 222 and dash area 211 intersect i.e. in figure), sense line of now reversing gear (or redundancy sense line of reversing gear) is shown as the position signalling RPS (or RPSK) that reverses gear, neutral sense line (or neutral redundancy sense line) is shown as neutral gear position signal NPS (or NPSK), system judges that neutral gear position signal NPS (or NPSK), prior to the position signalling RPS (or RPSK) that reverses gear, is sentenced in neutral gear position.
Fig. 5 is the signal output schematic diagram of neutral gear position signal NPS of the present invention and neutral gear position redundant signals NPSK.
Specifically, as shown in figure 5, ordinate X and X ' represent the displacement of shifting shaft 101, abscissa Y represents the level V of output signal, and figure middle polyline 201 represents neutral gear position signal NPS, and broken line 202 represents neutral gear position redundant signals NPSK.Because neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ' are that the neutral magnet 1052 on shifting shaft 101 is independently sensed from two angles, the signal level that corresponding neutral sense line 112 and neutral redundancy sense line 114 are produced is also different.Dash area 221 (same to Fig. 4) represents shifting shaft 101 in neutral gear position in figure.When shifting shaft 101 is in the upside gear of dash area 221, do with the B directions of arrow when moving back and forth between neutral gear position and downside gear, neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ' produce the low and high level signal for representing neutral respectively as switch Hall inductor.Specifically, neutral gear position signal NPS 201, low level L is set in non-NULL gear, it is high level H in the neutral gear position of dash area 221;Neutral gear position redundant signals NPSK 202, high level H is set in non-NULL gear, is low level L in the neutral gear position of dash area 221.
Fig. 6 is that the present invention is reversed gear the signal output schematic diagram of position signalling RPS and the position redundant signals RPSK that reverses gear.
As shown in fig. 6, abscissa X and X ' represent the displacement of shifting shaft 101, ordinate Y represents the level V of output signal, and figure middle polyline 203 represents the position signalling RPS that reverses gear, and broken line 204 represents the position redundant signals RPSK that reverses gear.Because reversing gear position signalling sensing element 106 and the position redundant signals sensing element 106 ' that reverses gear being independently sense the magnet 1053 that reverses gear on shifting shaft 101 from two angles, the signal level that corresponding sense line 116 of reversing gear is produced with redundancy sense line 118 of reversing gear is also different.Dash area 222 (same to Fig. 4) represents shifting shaft 101 in position of reversing gear in figure.When shifting shaft 101 is done with the A directions of arrow when moving back and forth between position and forward gear position reversing gear, sense line of reversing gear 116 and redundancy sense line 118 of reversing gear produce the low and high level signal for producing respectively and representing and reverse gear:Reverse gear position signalling RPS 203, in non-position of reversing gear for low level L, in the position of reversing gear of dash area 222 for high level H;Reverse gear position redundant signals NPSK 204, in non-position of reversing gear for high level H, in the position of reversing gear of dash area 222 for low level L.
In fact:Two neutral sensing units in two-way neutral sense line are (such as:Neutral gear position signal sensing element 104 and neutral gear position redundant signals sensing element 104 ') center of whole shift range is located at, there is magnetic field induction to all gears.In two neutral sensing unit normal works, when and if only if shifting shaft enters neutral shift range, two neutral sense lines send neutral gear position signal NPS and neutral gear position redundant signals NPSK.
Before signal is produced, the analog signal transmission of the reflection neutral gear position that the motion of neutral gear position signal sensing element 104 and the separate sensing neutral magnet 1052 of neutral gear position redundant signals sensing element 104 ' is produced is to the processor in sense line, exported into voltage signal (or pwm signal) through the flow processing shown in Fig. 3, i.e. neutral gear position signal NPS and neutral gear position redundant signals NPSK.
According to a preferred embodiment of the present invention, neutral gear position signal NPS and neutral gear position redundant signals NPSK in the neutral sense line of two-way independence form one group of complementary signal pair.Automotive control system ECU receives the complementary two paths of signals of redundancy and may make up diagnosis.Reverse gear position signalling sensing element 106 and the separate sensing of position redundant signals sensing element 106 ' that reverses gear reverse gear magnet 1053 the reflection that produces of motion reverse gear position analog signal transmission to corresponding processor, processed through processor and change into voltage signal (or pwm signal output), that is, reverse gear the position signalling RPS and position redundant signals RPSK that reverses gear.According to a preferred embodiment of the present invention, the position signalling RPS and position redundant signals RPSK that reverses gear that reverses gear in the sense line of reversing gear of two-way independence forms one group of complementary signal pair, and automotive control system ECU receives the complementary two paths of signals of redundancy and constitutes condition diagnosing.
Fig. 7 is the magnetic field value output signal comparison diagram of slender type magnet arrangement of the present invention and roomy type magnet arrangement.
In Fig. 1, neutral magnet 1052 and the magnet 1053 that reverses gear are all elongated in shape, neutral magnet 1052 along shifting shaft 101 axis direction growth strip, reverse gear strip of the magnet 1053 along the axis horizontal direction camber of shifting shaft 101.Wherein, the width of neutral magnet can be 3~7mm, particularly be 3~5mm or 4~6mm, and according to the service condition of different clients, width is specifically as follows 3mm, 3.5mm, 4mm, 4.5mm or 5mm etc..Both elongated strip magnet its magnetic field intensity concentrations, this will not produce influence to other periphery electric elements, simultaneously because its magnetic field intensity concentrates on the narrower anglec of rotation, more than this angle, its magnetic field intensity is decreased obviously, substantially, sensing is sensitive, is specifically shown in Fig. 7 for signal saltus step.
Fig. 7 show the comparison diagram of the magnetic field Distribution value of magnetic field Distribution value magnet (referred to as " wide magnet ") generation wider with size of magnet arrangement of the invention 105 (by taking neutral magnet 1052 as an example) generation, abscissa represents the anglec of rotation, and ordinate represents magnetic field value.In figure, upside curve 710 is the magnetic field Distribution value of magnet wide, and lower curve 720 is the magnetic field Distribution value of neutral magnet 1052.The magnetic field value distribution curve 710 of magnet wide because magnet width is larger, magnetic field distribution is wider, also more disperse, and the slope of curve is smaller by its curve distribution;The magnetic field value distribution curve 720 of neutral magnet 1052 is smaller because of magnet width, and it substantially weakens in the larger both sides magnetic field of the anglec of rotation, therefore its curve distribution is more concentrated, and the slope of curve is larger.
The present invention uses using switch Hall inductor to sense magnetic field value, relative to the angle that 3D hall sensors sense magnetic field, what switch Hall was sensed is the size of magnetic field actual value, i.e. when magnet rotates to certain angle magnetic field value more than or less than certain threshold value, sensor sends sensing signal, thus for the change of the anglec of rotation, the bigger sensing of change of magnetic field value is sensitiveer.The anglec of rotation in scheming is as 5 ° for trip point is illustrated, when when rotating to 5 ° for 4.9 °, the signal value variable quantity of magnet wide is H1, the magnetic field value variable quantity of neutral magnet 1052 is H2, because the magnetic field value of neutral magnet 1052 is changed greatly, so H2 > H1, for switch Hall inductor, this larger magnetic field value changes are easier sensing, so the smaller neutral magnet 1052 of the width magnet more larger than width is more suitable for switch Hall inductor relative to 3D hall sensors.
Although present invention is described for the specific embodiment shown in refer to the attached drawing, it is to be understood that, without departing substantially from present invention teach that spirit and scope and background under, sensor of the invention system can have many versions, the different layouts of such as separate type magnet.Art technology those of ordinary skill will additionally appreciate different modes to change disclosed embodiment of this invention, each fall within the present invention and spirit and scope by the claims.

Claims (26)

1. a kind of sensing system, for the neutral gear position for sensing shift of transmission axle (101) and position of reversing gear;Institute Stating sensing system includes sensor (100) and magnet arrangement (105), and the magnet arrangement (105) is arranged on change On the shifting shaft (101) of fast device;
It is characterized in that:
The magnet arrangement (105) is neutral magnet (1052) and the magnet that reverses gear (1053);The neutral magnet (1052) The magnetic field signal of the neutral gear position of correspondence shifting shaft (101) is produced, the magnet that reverses gear (1053) produces correspondence gearshift The magnetic field signal of the position of reversing gear of axle (101);The magnetic field signal of the neutral gear position is believed with the magnetic field of the position of reversing gear Number have opposite distribution arrangement;
The sensor (100) includes:
Neutral sense line (112,114), is provided with sensing element, sensing element (104,104 ') sense The magnetic field signal of neutral magnet (1052) motion is surveyed, the signal of reaction neutral gear position is produced;
Sense line of reversing gear (116,118), is provided with sensing element, sensing element (106,106 ') sense The magnetic field signal that the magnet (1053) that reversed gear described in surveying is moved, produces the signal for reacting position of reversing gear.
2. sensing system as claimed in claim 1, it is characterised in that:
The neutral magnet (1052) is set along the axis direction of the shifting shaft (101), the magnet that reverses gear (1053) Along the axis horizontally set of the shifting shaft (101).
3. sensing system as claimed in claim 1, it is characterised in that:
The neutral magnet (1052) is elongated in shape with the magnet that reverses gear (1053).
4. sensing system as claimed in claim 3, it is characterised in that:
The width of the neutral magnet (1052) is 3~7mm.
5. sensing system as claimed in claim 4, it is characterised in that:
The width of the neutral magnet (1052) is 3~5mm or 4~6mm.
6. sensing system as claimed in claim 5, it is characterised in that:
The width of the neutral magnet (1052) is 3mm, 3.5mm, 4mm, 4.5mm or 5mm.
7. sensing system as claimed in claim 1, it is characterised in that:
The neutral magnet (1052) and the magnet that reverses gear (1053) interval setting.
8. sensing system as claimed in claim 1, it is characterised in that:
Also include magnet carrier (160);
The neutral magnet (1052) is fixedly installed in the magnet carrier (160) with the magnet that reverses gear (1053), Form integral piece.
9. sensing system as claimed in claim 1, it is characterised in that:
The neutral sense line (112,114) is two-way, and a sensing element is provided with per road neutral sense line, Two sensing elements (104,104 ') synchronously sense the motion of the neutral magnet (1052), and produce two-way respectively Signal, wherein signal is neutral gear position signal (NPS) all the way, another road signal is neutral gear position redundant signals (NPSK);
The sense line of reversing gear (116,118) is two-way, and sense line of being reversed gear per road is provided with a sensing element, Two sensing elements (106,106 ') are synchronously reversed gear described in sensing the motion of magnet (1053), and produce two-way respectively Signal, wherein signal is the position signalling (RPS) that reverses gear all the way, another road signal is the position redundant signals (RPSK) that reverse gear.
10. sensing system as claimed in claim 9, it is characterised in that each neutral sense line (112,114) Process circuit (130) is included with sense line of reversing gear (116,118), process circuit (130) connects the sensing Element (104,104 ', 106,106 '), for receiving the sensing element (104,104 ', 106,106 ') sense The output valve W of the changes of magnetic field surveyed obtained by magnet arrangement (1052,1053).
11. sensing systems as claimed in claim 10, it is characterised in that:
The process circuit (130) includes memory (131) and processor (132);
The memory (131), for storing the sensing element (104,104 ', 106,106 ') in simulation journey Measurement is obtained in sequence, and the analog output value W of each gear positions is in corresponding to the shifting shaft (101)0
The processor (132), is provided with two inputs, and one end connects the memory (132), receives the mould Intend output valve W0;Another input connects the sensing element (104,104 ', 106,106 '), receives sensing unit The output valve W of part (104,104 ', 106,106 ');
The processor (132) compares the output valve W and analog output value W0, and send the sensing element The position signalling that (104,104 ', 106,106 ') measure, or non-location signal.
12. sensing systems as claimed in claim 11, it is characterised in that:
The real-time output of two sensing elements (104,104 ') in the two-way neutral sense line (112,114) Analog output value Ws of the value W less than corresponding neutral gear positionNWhen, in the neutral sense line (112,114) The process circuit (130) is emitted in gear position signalling.
13. sensing systems as claimed in claim 11, it is characterised in that:
The real-time output of two sensing elements (104,104 ') in the two-way neutral sense line (112,114) Analog output value Ws of the value W more than or equal to corresponding neutral gear positionNWhen, the neutral sense line (112,114) In the process circuit (130) send neutral gear position signal.
14. sensing systems as claimed in claim 11, it is characterised in that:
When the shifting shaft (101) reverses gear scope and when not entering to keep off, the two-way neutral sense wire into neutral and entering Road (112,114) sends neutral gear position signal;The sense line of reversing gear (116,118) sends the position letter that reverses gear Number;
The neutral gear position signal priority is designated as neutral gear position in the position signalling that reverses gear.
15. sensing systems as claimed in claim 11, it is characterised in that:
The reality of the described two sensing elements (106,106 ') in the two-way reverses gear sense line (116,118) When output valve W and corresponding position of reversing gear analog output value WRIt is described to reverse gear during for certain difference or certain proportion The process circuit (130) in sense line (116,118) sends the position signalling that reverses gear in advance.
16. sensing systems as claimed in claim 9, it is characterised in that:
Described neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK) form one group of complementary signal pair;
The described position signalling that reverses gear (RPS) and the position redundant signals (RPSK) that reverse gear form one group of complementary signal pair.
17. position sensor systems as claimed in claim 9, it is characterised in that:
The two-way neutral sense line is separate;
Two-way sense line of reversing gear is separate.
18. sensing systems as claimed in claim 16, it is characterised in that:
The level of the neutral gear position signal (NPS) and neutral gear position redundant signals (NPSK) is opposite:When neutral position When confidence number (NPS) is high level, neutral gear position redundant signals (NPSK) are low level;When neutral gear position signal (NPS) when being low level, neutral gear position redundant signals (NPSK) are high level.
19. sensing systems as claimed in claim 16, it is characterised in that:
The level of the position signalling that reverses gear (RPS) and the position redundant signals (RPSK) that reverse gear is opposite:When position of reversing gear When confidence number (RPS) is high level, the position redundant signals (RPSK) that reverse gear are low level;When the position signalling that reverses gear (RPS) when being low level, the position redundant signals (RPSK) that reverse gear are high level.
20. sensing systems as claimed in claim 1, it is characterised in that:
The sensing element (104,104 ', 106,106 ') is switch Hall element.
21. sensing systems as claimed in claim 20, it is characterised in that:
Described its operating voltage of switch Hall element is 5V-12V.
22. sensing systems as claimed in claim 9, it is characterised in that:
Two sensing elements (104,104 ') correspondence in the two-way neutral sense line (112,114) is entirely changed The neutral gear position for keeping off scope is set;
When and if only if shifting shaft (101) enters neutral shift range, the two-way neutral sense line sends neutral gear position letter Number (NPS) and neutral gear position redundant signals (NPSK).
23. sensing systems as claimed in claim 9, it is characterised in that:
Two sensing elements (106,106 ') correspondence that the two-way reverses gear in sense line (116,118) is reversed gear position Install;
And if only if shifting shaft (101) enters when reversing gear scope, and two-way sense line of reversing gear sends the position letter that reverses gear Number (RPS) and the position redundant signals (RPSK) that reverse gear.
24. sensing systems as claimed in claim 1, it is characterised in that:
The gearbox that the sensor (100) is applied to is manual-gear vehicle, and gear is set for 8 gears, 6 advances Gear point both sides are symmetrical arranged per side 3 along neutral gear, and the gear that reverses gear is asymmetric to be located at neutral gear side.
25. sensing systems as claimed in claim 1, it is characterised in that:
The gearbox that the sensor (100) is applied to is manual-gear vehicle, wherein, the gear that reverses gear is along shifting shaft (101) All gear one end are axially located, and are set in shifting shaft (101) axially spaced-apart with forward range.
26. sensing system as described in any one of claim 1 to 25, it is characterised in that:
The sensor is integrated part.
CN201510909179.7A 2015-12-10 2015-12-10 A kind of sensing system Pending CN106870727A (en)

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Application publication date: 20170620