CN206723435U - For sensing the sensor-based system of gear rotating shaft position - Google Patents
For sensing the sensor-based system of gear rotating shaft position Download PDFInfo
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- CN206723435U CN206723435U CN201720557374.2U CN201720557374U CN206723435U CN 206723435 U CN206723435 U CN 206723435U CN 201720557374 U CN201720557374 U CN 201720557374U CN 206723435 U CN206723435 U CN 206723435U
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Abstract
The utility model discloses a kind of sensor-based system for being used to sense gear rotating shaft position, the utility model will be arranged to the different first length areas magnet of magnetic direction and the second length areas magnet on one block of magnet, sense and produce the sensing electric signals of the first length areas magnet of reaction and the second length areas magnet movement；The first kind reference signal and the Second Type reference signal for the second length areas magnet of the first length areas magnet of the analog sensing of memory cell storage simultaneously, processing unit is by sensing electric signals compared with reacting the first kind reference signal and Second Type reference signal of different stalls, you can judges that gear rotating shaft is in the position of reverse gear or drive shift and neutral gear.Being realized by sensor-based system provided by the utility model only sets one block of magnet and circuit kit mechanical organ to sense gear rotating shaft position, so as to effectively realize the detection of gear rotating shaft neutral position and reverse gear position, manufacturing cost is reduced, and reduces out of order probability.
Description
Technical field
Field of automobile control is the utility model is related to, it is more particularly to a kind of to be used to sense gear rotating shaft position based on Hall element
The sensor-based system put.
Background technology
Current position sensor, which has, has been widely used in each industrial circle, such as field of automobile control.Use position
Sensing device is put to sense the position of gear rotating shaft be known in the industry.
Specifically, such as in order to save gasoline, rested in automobile gears rotating shaft after neutral position has been equipped with a period of time
(such as 5 seconds), electronic control unit (Electronic Control Unit, ECU), which produces, stops control signal, automatic to close
The engine of automobile.Then, when control unit of engine receives the signal that automobile clutch is jammed on, if gear rotating shaft
Neutral position is remained at, ECU, which will be produced, starts control signal, the engine (automatic start-stop technology) of automatic start automobile.Institute
So that the control circuit of automobile needs to detect the neutral position of gear rotating shaft with position sensing device.
In addition, for driving safety, when automobile gears rotating shaft enters reverse gear position, it is necessary to open back-up lamp or start language
Mixer, reminds surrounding pedestrian, and the automobile is in state of rolling backward.So the control circuit of automobile needs to use position sensing device
To detect the reverse gear position of gear rotating shaft.
Traditionally, the detection of gear rotating shaft neutral position and reverse gear position needs to use two position sensing devices real
It is existing, yet with two sensing devices are used, two sets of magnet, two sets of circuit elements and mechanical organ need to be used, so manufacturing cost
It is high.It is additionally, since and uses two sets of circuit elements and mechanical organ, out of order probability can be high.
Therefore, it is necessary to provide a kind of improved position sensing device, the position sensing device can reduce manufacturing cost,
And reduce out of order probability.
Utility model content
Technical problem for more than, the utility model are intended to provide a kind of improved sensor-based system, can effectively sense shelves
Manufacturing cost is reduced while the rotating shaft position of position, reduces the probability of failure.Concrete technical scheme is as follows：
A kind of sensor-based system for being used to sense gear rotating shaft position, the gear rotating shaft are provided with array shelves in its axial direction
Position position；The array gear positions are included along the axially arranged several neutral gears of the gear rotating shaft and in neutral gear two
Side is oppositely arranged several to moving gear；One in the motion gear is reverse gear, and remaining gear is all forward,
The sensor-based system includes：
Sense magnets, the sense magnets are fixedly installed in the gear rotating shaft, with the gear pivot；It is described
Sense magnets are being divided axially into the first length areas magnet and the second length areas magnet；The magnetic of the first length areas magnet
Field direction is being the first polarity with the side of the gear shaft contacts, is the second polarity in the side away from the gear rotating shaft；
The magnetic direction of the second length areas magnet is that the side of the gear shaft contacts is the second polarity, away from described
The side of gear rotating shaft is the first polarity；So as in the magnetic direction of the first length areas magnet and in the second length areas magnet
Magnetic direction it is opposite；And
Sensing unit, the sensing unit are arranged to sense the changes of magnetic field during sense magnets motion；When described
When in operation change in location occurs for gear rotating shaft, the sensing unit senses the changes of magnetic field of the sense magnets, and produces
Corresponding electrical signal of reaction；The electrical signal of reaction is compared with a predetermined benchmark electrical signal of reaction, to indicate
State gear rotating shaft and be in drive shift gear or reverse gear.
Sensor-based system as previously described, the first length areas magnet produce the changes of magnetic field of the first form；It is described
Second length areas magnet produces the changes of magnetic field of the second form.
Sensor-based system as previously described, when the gear pivot to remaining one or more groups of drive shift gear,
The changes of magnetic field for first form that the sensing unit senses, to indicate corresponding drive shift gear；When described
During gear pivot to reverse gear and corresponding drive shift gear, the sensing unit senses the second form
Changes of magnetic field, to indicate the reverse gear or corresponding drive shift gear.
Sensor-based system as previously described, in addition to：Memory cell, it is first length field that the memory cell, which is used for,
The first kind reference signal and be the Second Type base that the second length areas magnet prestores that domain magnet prestores
Calibration signal；Processing unit, it is connected with the sensing unit and the memory cell, for magnetic field will to be sensed from sensing unit
Change is converted into electrical signal of reaction, and the electrical signal of reaction and the first kind reference signal and Second Type benchmark are believed
Number it is compared, so as to judge that the gear rotating shaft is to be in drive shift gear or reverse gear.
Sensor-based system as previously described, the first kind reference signal are the advance analog sensing institute of the sensing unit
State the first length areas magnet movement and caused electrical signal of reaction；The Second Type reference signal is that the sensing unit is pre-
Second length areas magnet movement described in first analog sensing and caused electrical signal of reaction.
Sensor-based system as previously described, the first kind reference signal has several first signal criterion values, several
The first signal criterion value represents the position of multiple drive shift gears；The Second Type reference signal has several second letters
Number a reference value, several secondary signal a reference values represent the position of drive shift gear and reverse gear；
The changes of magnetic field sensed from the sensing unit is converted into electrical signal of reaction by the processing unit, and by described in
Electrical signal of reaction is compared with several first signal criterion values and several secondary signal a reference values, so as to distinguish
State drive shift gear and reverse gear.
Sensor-based system as previously described, when the electrical signal of reaction and several first signal criterion values and several the
For one in binary signal a reference value when a reference value is identical or difference is in the range of specific region, the processing unit judges the shelves
Position rotating shaft is in the corresponding gear of a reference value.
Sensor-based system as previously described, in addition to：Indicating circuit, the indicating circuit are connected with the processing unit；
When the processing unit judges the gear rotating shaft for drive shift gear, the indicating circuit is set to by the processing unit
First state；When the processing unit judges the gear rotating shaft for reverse gear, the processing unit is by the instruction
Circuit is set to the second state.
Sensor-based system as previously described, the indicating circuit sends state electric signal to vehicle control system, for car
The start and stop of control system engine judge.
Sensor-based system as previously described, axis both sides first angle of rotation of the neutral gear along the gear rotating shaft
The interior setting of degree；The sensing unit senses the first length areas magnet and the second length areas magnet is in the first rotational angle
Change of magnetic field strength and sensing electric signals are produced in interior neutral gear scope；The first kind reference signal, which also has, to be represented
First neutral gear a reference value of the first length areas magnet movement；The Second Type reference signal, which also has, represents the second length
Spend the second neutral gear a reference value of region magnets motion；
The changes of magnetic field sensed from the sensing unit is converted into electrical signal of reaction by the processing unit, and by described in
Electrical signal of reaction compared with the first neutral gear a reference value and the second neutral gear a reference value, when the electrical signal of reaction with
When the first neutral gear a reference value or same or about the second neutral gear a reference value, the processing unit judges the shelves
Position rotating shaft is in the corresponding neutral gear of a reference value.
Sensor-based system as previously described, the second length areas magnet correspond to the reverse gear and corresponding
Drive shift gear；The first length areas magnet corresponds to remaining drive shift gear.
Sensor-based system as previously described, the second length areas magnet length are the first length areas magnet length
The 1/2 of degree.
Sensor-based system as previously described, the sensing unit are a single Hall sensing units.
Sensor-based system as previously described, the sensing unit are Hall sensing units.
Sensor-based system as previously described, the array gear positions are three pairs of gears, are respectively：
First pair of gear be：1 grade of gear and 2 grades of gears；
Second pair of gear be：3 grades of gears and 4 grades of gears；
3rd pair of gear be：5 grades of gears and R shelves gears,
Wherein 1 grade, 2 grades, 3 grades, 4 grades and 5 grades gear is drive shift, and R shelves are reverse gear.
Sensor-based system as previously described, the first length areas magnet and the second length areas magnet are described in
The axial direction of rotating shaft is arranged in order setting.
Sensor-based system as previously described, the sense magnets are formed in one part.
Sensor-based system as previously described, the relatively described sense magnets of the sensing unit are arranged to：When the gear turns
When axle is in a selected neutral gear, the sensing unit and radially aligned of the sense magnets along the gear rotating shaft.
Sensor-based system as previously described, the first kind reference signal and the Second Type reference signal do not weigh
Close.
Sensor-based system as previously described, the greatest measure of the first kind reference signal are less than the Second Type base
The minimum value of calibration signal.
Sensor-based system as previously described, the first kind reference signal and the Second Type reference signal for electricity
Press signal, duty cycle signals or unilateral nibble transmission signal.
Sensor-based system as previously described, the electrical signal of reaction are voltage signal, duty cycle signals or unilateral half-word
Save transmission signal.
Sensed in the prior art using neutral position sensor and export neutral position, but this sensor is difficult to differentiate between advancing
File location and reverse gear position, so as to need extra sensor to distinguish reverse gear position.
The utility model will be arranged to the first length areas magnet and the second length areas magnet on one block of magnet, and first
The magnetic direction of length areas magnet and the second length areas magnet is different and corresponds to different gear positions, and can divide
The changes of magnetic field of the first form and the changes of magnetic field of the second form are not produced so that sensor senses the changes of magnetic field of the first form
With the caused electrical signal of reaction of the changes of magnetic field of the second form；Memory cell is the of the first length areas magnet simultaneously
One type reference signal and the Second Type reference signal for the second length areas magnet, processing unit distinguish electrical signal of reaction
Compared with first kind reference signal and Second Type reference signal, you can before judging that gear rotating shaft is in reverse gear still
Enter the position of shelves and neutral gear.Realized by sensing device provided by the utility model and one block of magnet and a set of electricity are only set
Road mechanical organ sensing gear rotating shaft position, so as to effectively realize the detection of gear rotating shaft neutral position and reverse gear position, drop
Low manufacturing cost, and reduce out of order probability.All structure members of existing design, size, shape can not changed simultaneously
In the case of shape, original Mechanical Engineering Design is taken into account, in the case where only changing magnet arrangement, and is realized of the present utility model
Technique effect.
Brief description of the drawings
Below in conjunction with the accompanying drawings, the utility model is further described：
Fig. 1 is the structural representation of sensor-based system of the present utility model；
Fig. 2 is the schematic top plan view of sensor-based system of the present utility model；
Fig. 3 is the schematic side view of gear rotating shaft of the present utility model and magnet arrangement；
Fig. 4 is sensing device functional module structure schematic diagram of the present utility model；
The magnetic induction that Fig. 5 a correspond to the magnet arrangement sensed during gear 1-2 in different rotary angle for sensing device is strong
Spend the schematic diagram of change；
The magnetic induction that Fig. 5 b correspond to the magnet arrangement sensed during gear 3-4 in different rotary angle for sensing device is strong
Spend the schematic diagram of change；
The magnetic induction that Fig. 5 c correspond to the magnet arrangement sensed during gear 5-R in different rotary angle for sensing device is strong
Spend the schematic diagram of change；
Fig. 6 is that magnetic field signal is converted to electrical signal of reaction by sensing device corresponding to different stalls in different rotary angle
Schematic diagram.
Embodiment
Various embodiments of the present utility model are carried out below with reference to the accompanying drawing for forming this specification part
Description.Although it should be understood that in the utility model using represent direction term, such as "front", "rear", " on ",
" under ", the description such as "left", "right" various example features of the present utility model and element, but herein using these terms only
It is purpose for convenience of explanation, is determined based on the example orientations shown in accompanying drawing.Due to disclosed in the utility model
Embodiment 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 limiting
System.In the conceived case, the identical or similar reference used in the utility model refers to identical part.
Fig. 1 is the structural representation of sensor-based system of the present utility model.
As shown in figure 1, sensor-based system 100 includes magnet arrangement 102 and sensing device 103.Magnet arrangement 102 is mounted
Onto gear rotating shaft 101, sensing device 103 is fixedly installed on the top of magnet arrangement 102, and separates with magnet arrangement 102
Open certain distance or gap.Gear rotating shaft 101 can and rotary motion for linear motion along its own axis, magnet arrangement 102
As gear rotating shaft 101 is for linear motion together and rotary motion.When gear rotating shaft 101 moves along a straight line, gear rotating shaft is in
Neutral gear, when gear rotating shaft 101 rotates, gear rotating shaft enters corresponding drive shift or reverse gear.When magnet arrangement 102 with
When the motion of gear rotating shaft 101, magnet arrangement 102 can produce magnetic strength to the position (or detecting location) where sensing device 103
Strength Changes are answered, and then produce changes of magnetic field.When the shadow that sensing device 103 is changed by the magnetic induction intensity of magnet arrangement 102
When ringing, sensing device 103 can produce electrical signal of reaction.As exemplary embodiment, sensing device 103 may include Hall original paper
Or magnetic resistance (magneto-resistive) sensor, produced for responding by the caused changes of magnetic field of magnetic induction intensity change
Raw electrical signal of reaction.More specifically, sensing device 103 can include the semiconductor film (current-carrying of current-carrying
Semi-conductor membrane), it can be produced when by magnetic induction intensity change/changes of magnetic field perpendicular to film surface
The raw electrical signal of reaction perpendicular to the sense of current.Sky of the magnetic induction intensity/magnetic field between magnet arrangement 102 and sensing device 103
Gap interior edge three-dimensional coordinate (Bx, By, Bz) changes.Sensing device 103 is usually designed to detection along the bidimensional in Bx or By or three
The changes of magnetic field of dimension.
Fig. 2 is the schematic top plan view of the sensor-based system of the present utility model using magnet arrangement.
Sensing device 103 should be illustrated at the top of magnet arrangement 102, in order to which original of the present utility model is better described
Reason, sensing device 103 is illustratively positioned at the side of gear rotating shaft 101 in Fig. 2, but reflects magnet arrangement 102 using dotted line
Above-mentioned actual positional relationship between sensing device 103.
As shown in Fig. 2 magnet arrangement 102 has along the length L turned on the longitudinal direction of gear rotating shaft 101 (or length direction) with true
Protect when gear rotating shaft 101 along its longitudinally linearly move when sensing device 103 all the time in the effective detection of magnet arrangement 102
In region.Magnet arrangement 102 has along the width W in gear rotating shaft 101 horizontal (or width) is turned to ensure when gear turn
Axle 101 along its axis rotate when sensing device 103 all the time in the effective search coverage of magnet arrangement 102.
Fig. 2 shows six gears of manual gear automobile and the relative position of magnet arrangement 102.Straight line is being made in gear rotating shaft 101
Array gear positions are defined in the stroke of motion, while when gear rotating shaft 101 rotates, it is every in several gear positions
One is to be set relatively in two edges both sides of the first corner (neutral gear angle) along the axis both sides of the gear rotating shaft 101
That puts is several to moving gear：Respectively 1 grade 2031 and 2 grades 2032,3 grades 2033 and 4 grades 2034,5 grades 2035 and reverse gear 204, from
And form 3 pairs of motion gears；One in a pair of gears (5 grade 2035 and reverse gear 204) of one end of gear rotating shaft 101 is down
Shelves gear 204, remaining gear is all forward, and reverse gear 204 (R shelves) is located at the downside of gear rotating shaft 101.With gear rotating shaft
101 linear motion, magnet arrangement 102 can move with gear rotating shaft 101 in neutral position 2036.With gear rotating shaft 101
Rotation, magnet arrangement 102 can with gear rotating shaft 101 along its axially left and right move linearly, axially have three work
Position (1-2 shelves, 3-4 shelves, 5-R shelves).When magnet arrangement 102 is in 1-2 shelves operating positions, does axis rotation and be rotated up cutting
1 grade 2031, and rotate down 2 grade 2032 of incision；When magnet arrangement 102 is in 3-4 shelves operating positions, 3 grades of incision is rotated up
2033, and rotate down 4 grade 2034 of incision；When magnet arrangement 102 is in 5-R shelves operating positions, 5 grades of incision is rotated up
2035, and rotate down incision R shelves 204.
Because gear rotating shaft 101 is in rotary motion, 1 grade 2031,3 grade 2033, the angle of 5 grade of 2035 rotation is identical, 2 grades
2032,4 grade 2034 with R shelves 204 rotate angle it is identical, therefore how by gear rotating shaft 101 be in R shelves 204 and and R shelves 204
(such as 2 grade 2032,2034) 4 grades distinguish the drive shift that position overlaps, turn into key of the present utility model.
Magnet arrangement 102 is along on linear movement direction (i.e. length direction), including the He of the first length areas magnet 201
Second length areas magnet 202, the length of the second length areas magnet 202 is the length of the first length areas magnet 201
1/2 (or other ratios).Setting of the magnet arrangement 102 in gear rotating shaft 101 will ensure following position relationship：Work as magnet arrangement
102 when being in 1-2 shelves or 3-4 shelves operating positions, and the detecting location of the sensing unit 401 of sensing device 103 is the first length field
Domain magnet 201；When magnet arrangement 102 is in 5-R shelves operating positions, the detecting location of the sensing unit 401 of sensing device 103
For the second length areas magnet 202.
Fig. 3 is the schematic side view of gear rotating shaft of the present utility model and magnet arrangement.Such as Fig. 2, shown in Fig. 3, first
The magnetic direction of the length areas magnet 202 of length areas magnet 201 and second is on the contrary, for example if Fig. 2 is exemplarily by the first length
The magnetic direction of degree region magnets 201 is arranged to the South Pole (S) and is touched on the surface of gear rotating shaft 101, and its opposite face is (away from one
Side) it is the arctic (N) towards sensing device 103；Second length areas magnet 202 is arranged to the arctic (N) and is attached at gear turn
On the surface of axle 101, its opposite face is the South Pole (S) towards sensing device 103.
Because magnet arrangement 102 includes the first length areas magnet 201 and the second length areas magnet 202, the first length
The magnetic direction of the length areas magnet 202 of region magnets 201 and second and benchmark magnet 001 is spent on the contrary, therefore when sensing, magnetic
During iron device 102 moves with gear rotating shaft 101, sensing device 103 senses the magnetic strength of the first length areas magnet 201
The electrical signal of reaction answered Strength Changes and exported senses the magnetic induction intensity of the second length areas magnet 202 with sensing device 103
The electrical signal of reaction for changing and exporting is different.That is, due to when magnet arrangement 102 is in 5 grade 2035 or R shelves 204, sensing
The detecting location of the sensing unit 401 of device 103 is the second length areas magnet 202, and in other gears, detecting location is
First length areas magnet 201.Therefore, when magnet arrangement 102 is in R shelves 204, sensing device 103 senses the second length field
The magnetic induction intensity change of domain magnet 202, so as to different from being in the drive shift (i.e. 2 overlapped with R shelves 204 when magnet arrangement 102
Shelves 2032 and 4 grades 2034) when, sensing device 103 sense the first length areas magnet 201 magnetic induction intensity change.Pass through
Such method for sensing, R shelves are distinguished with the drive shift (i.e. 2 grades 2032 and 4 grades 2034) being in and R shelves overlap, specifically
See Fig. 6.
Sensing device 103 sense in advance magnet arrangement 102 with gear rotating shaft 101 is moved and in the induced electricity of diverse location
Signal, and the electrical signal of reaction of the diverse location of magnet arrangement 102 is stored in memory cell 403 as analog reference signal,
It is specifically shown in Fig. 4.
Fig. 4 is sensing device functional module structure schematic diagram of the present utility model.
As shown in figure 4, sensing device 103 includes sensing unit 401, processing unit 402, memory cell 403 and instruction
Circuit 404.Sensing unit 401 is used for the magnetic induction intensity change for sensing magnet arrangement 102.Memory cell 403 is used to store reality
Border measures the first kind caused by the first length areas magnet 201 of magnetic induction intensity variable signal and sensing in diverse location
The Second Type reference signal 602 of the length areas magnet 202 of reference signal 601 and second.Processing unit 402 is by sensing unit
The 401 magnetic induction intensity changes measured are converted to electrical signal of reaction, by electrical signal of reaction compared with reference signal, so as to judge shelves
The position of position rotating shaft 101, and when gear rotating shaft 101 be in neutral gear or reverse gear position, control indicating circuit 404 send neutral gear or
Reverse range signal.Indicating circuit 404 controls according to processing unit 402, to sensing device 103 outside send neutral gear or reverse range signal.
, it is necessary to store analog reference signal before actual sensed, so as to in actual sensed, actual measurement to be obtained
Electrical signal of reaction compared with analog reference signal, and then determine the location of gear rotating shaft 101.Analog reference signal is by right
Magnet arrangement 102 is tested and obtains and store in advance, is specifically shown in Fig. 6.
The magnetic induction that Fig. 5 a correspond to the magnet arrangement sensed during gear 1-2 in different rotary angle for sensing device is strong
Spend the schematic diagram of change.
As shown in Figure 5 a, when magnet arrangement 102 as gear rotating shaft 101 persistently rotates between 1 grade 2031 and 2 grades 2032
When, if the output of sensing device 103 is transported to oscillograph, then, can from oscillograph observe the first curve 501 and
The magnetic induction intensity change of second curve 502, now first length areas magnet 201 of the sensing of sensing device 103.In such as Fig. 5 a
In shown coordinate system, X-coordinate represents the change of the rotation angle θ of gear rotating shaft 101, and Y-coordinate represents the change of magnetic induction intensity
Change Bx and By.
The magnet arrangement 102 that sensing unit 401 in first curve 501 expression sensing device 103 senses is with gear
When being moved between 1 grade 2031 and 2 grades 2032 along the magnetic induction intensity change curve of Bx dimensions, the first curve 501 is for rotating shaft 101
Cosine-shaped function line.The magnet arrangement 102 that second curve 502 expression sensing device 103 senses is as gear rotating shaft 101 is 1
The magnetic induction intensity change curves of By dimensions is prolonged in motion between 2031 and 2 grade 2032 of shelves, and the second curve 502 is sinusoidal shape function
Line.
Processing unit 402 measures the first curve 501 and the second curve 502 according to sensing unit 401, then bent by first
The curve 502 of line 501 and second is converted into the first kind reference signal 601 for meeting linear function as shown in Figure 6
Electrical signal of reaction is stored into memory cell 403, and Second Type reference signal 602 is similarly.
Processing unit 402 is calculated in the following manner：
(1) measurement obtains the two-dimentional relation that By and Bx corresponds to mechanical trip.Measure in advance multigroup magnetic induction density B y and
The actual mechanical movement position of Bx respective notch rotating shaft 101.
(2) two-dimentional relation of magnetic field angle θ and the mechanical trip of gear rotating shaft 101 is established：
The π of θ=atan2 (By/Bx) * 180/；
(3) functional relation of output electrical signal of reaction (V) and magnetic field angle θ is established：
Y1=(b2-b1)/(a2-a1) * θ+(a2b1-a1b2)/(a2-a1)；
Y2=(b4-b3)/(a4-a3) * θ+(a4b3-a3b4)/(a4-a3)；
Y1 represents forward 1, and the calibration curve of first kind reference signal 601, is sensed in advance corresponding to 2,3,4
Two calibration points are taken in calibration point：603 (a1, b1) coordinates and 604 (a2, b2) coordinates, Y1 can be obtained by above formula；Y2
The calibration curve of Second Type reference signal 602 corresponding to forward 5 and reverse gear R is represented, in calibration point is sensed in advance
Two calibration points 605 (a3, b3) and 606 (a4, b4) coordinates are taken, Y2 can be obtained by above formula.
Because forward and reverse gear can obtain oneself single mechanical trip with exporting electric signal V two-dimensional line respectively
Sexual intercourse establish multigroup two-dimentional relation array thus the electric signal V ' measured by comparing fall it is above-mentioned which group two-dimentional relation in can
To judge to be currently at drive shift or reverse gear, refer to and be hereinafter described.
The magnetic induction that Fig. 5 b correspond to the magnet arrangement sensed during gear 3-4 in different rotary angle for sensing device is strong
Spend the schematic diagram of change.Using with corresponding to the same method for sensing of gear 1-2, sensing device 103 sense magnet arrangement 102 with
Magnetic induction intensity change when gear rotating shaft 101 persistently rotates between 3 grades 2033 and 4 grades 2034, it is bent so as to obtain the 3rd
The curve 504 of line 503 and the 4th.
X-coordinate represents the change of the rotation angle θ of gear rotating shaft 101, and Y-coordinate represent magnetic induction intensity change Bx and
By。
As shown in Figure 5 b, the 3rd curve 503 is the magnet arrangement 102 that senses of sensing unit 401 with gear rotating shaft 101
The magnetic induction intensity change curve of time delay Bx dimensions is moved between 3 grades 2033 and 4 grades 2034, the 4th curve 504 is single for sensing
The magnet arrangement 102 that member 401 senses is as time delay By dimensions are moved in gear rotating shaft 101 between 3 grades 2033 and 4 grades 2034
Magnetic induction intensity change curve.Due to when gear rotating shaft 101 is in 3-4 shelves and when being moved in 1-2 shelves, the sense of sensing device 103
Survey the magnetic induction intensity change of equally the first length areas magnet 201 of sensing of unit 401, therefore the 3rd curve 503 is substantially with the
One curve 501 is identical, and the 4th curve 504 is substantially identical with the second curve 502.And then according to above correspond to 1-2 shelves phases
Same computational methods, calculate the 3rd curve 503 and the 4th curve 504, can equally obtain such as the first kind in Fig. 6
Type reference signal 601, is shown in Fig. 6.
The magnetic induction that Fig. 5 c correspond to the magnet arrangement sensed during gear 5-R in different rotary angle for sensing device is strong
Spend the schematic diagram of change.X-coordinate represents the change of the rotation angle θ of gear rotating shaft 101, and Y-coordinate represents the change of magnetic induction intensity
Change Bx and By.
As shown in Figure 5 c, the 5th curve 505 is the magnet arrangement 102 that senses of sensing unit 401 with gear rotating shaft 101
The magnetic induction intensity change curve of time delay Bx dimensions is moved between 5 grade 2035 and R shelves 204, the 6th curve 506 is sensing unit
401 magnet arrangements 102 sensed move the magnetic of time delay By dimensions with gear rotating shaft 101 between 5 grade 2035 and R shelves 204
Induction change curve.When gear rotating shaft 101 is moved in 5-R shelves, the sensing of sensing unit 401 second of sensing device 103
The magnetic induction intensity change of length areas magnet 202, due to the second length areas magnet 202 and the first length areas magnet 201
Magnetic direction on the contrary, therefore sensing device 103 obtains fiveth curve 503 different from the first curve 501, with the second curve
502 the 6th different curves 504.And then according to the sensing computational methods corresponding to 1-2 shelves, to the 5th curve 505 and
Six curves 506 are calculated, and can be obtained such as Second Type reference signal 602 in Fig. 6.
Fig. 6 is that magnetic field signal is converted to electrical signal of reaction by sensing device corresponding to different stalls in different rotary angle
Schematic diagram.
Abscissa in Fig. 6 represents the anglec of rotation, and ordinate represents the electrical signal of reaction that sensing device 103 exports, this reality
With being illustrated exemplified by new middle (Pulse Width Modulation, PWM) using pulse width modulating signal, in fact also
Other known aspects in the industry, such as voltage signal (V) or unilateral nibble transmission signal (SENT) can be used.
In figure 6, first kind reference signal 601 represents that sensing device 103 senses the first length areas magnet of magnet arrangement 102
201 analog reference signal, Second Type reference signal 602 represent that sensing device 103 senses the second length of magnet arrangement 102
The analog reference signal of region magnets 202.First kind reference signal 601 and Second Type reference signal 602 are linear letter
Number curve.The specific calculation of first kind reference signal 601 and Second Type reference signal 602 such as above Fig. 5 a parts
It has been discussed in detail.
Specifically, when magnet arrangement 102 persistently rotates with gear rotating shaft 101, sensing device 103 is to by magnet cartridge
Put and produce response along the magnetic induction intensity change of Bx and By dimensions and/or changes of magnetic field respectively caused by 102.
First kind reference signal 601 and Second Type reference signal 602 in Fig. 6, because of first kind benchmark
Signal 601 and Second Type reference signal 602 distinguish the first output line and the distribution of the second output line of linear function, different
Numerical value represents different gears, thus can have respectively in first kind reference signal 601 and Second Type reference signal 602
Several signal criterion values (or scope)：3 grades of reference signals 603 of simulation 1 grade corresponding to 1 grade 2031 and 3 grades 2033；2 grades
4 grades of reference signals 604 of simulation 2 grade corresponding to 2032 and 4 grade 2034；And the simulation R shelves benchmark letter corresponding to R shelves 204
Numbers 606.In addition, respectively obtained in the intermediate angle region of first kind reference signal 601 and Second Type reference signal 602
1 simulation neutral gear reference signal 607 and 608；5 grades of reference signals 605 of simulation corresponding to 5 grade 2035.Because of artificial adjustment first
The length ratio of the length areas magnet 202 of type reference signal 601 and second, can cause first kind reference signal 601 with
And numeric distribution of the Second Type reference signal 602 in the same coordinate system will not overlap.In actual use, difference is measured
Sensing signal respectively compared with the length areas magnet 202 of first kind reference signal 601 and second, different Distribution values
In different curve regions, its abscissa can represent different angles, so as to distinguish reverse gear, drive shift and neutral gear.
It is the operation for sensing neutral position below specific：
In actual use, processing unit 402 calculates the model that electrical signal of reaction is in simulation neutral gear reference signal 607,608
When enclosing interior, processing unit 402 indicates that indicating circuit 404 produces neutral position signal, comprises the following steps that：
In actual use, when gear rotating shaft 101 is for linear motion, sensing device 103 senses the magnetic of magnet arrangement 102
Induction and/or Distribution of Magnetic Field, sense and produce two magnetic induction intensity signals with sinusoidal and cosine shape.
According to foregoing mathematical formulae, processing unit 402 believes two magnetic induction intensity with sinusoidal and cosine shape
Number it is converted into an electrical signal of reaction (output signal or a numerical value).The electrical signal of reaction should fall as shown in Figure 6 first
In type reference signal 601 or Second Type reference signal 602.
Processing unit 402 believes resulting electrical signal of reaction and the simulation neutral gear benchmark being stored in memory cell 403
Number 607,608 scopes are compared.When processing unit 402 judges obtained electrical signal of reaction in simulation neutral gear reference signal 607,
In 608 scopes (array range, or difference is in certain area), processing unit 402 judges gear rotating shaft 101 in neutral position
On, exemplary in figure that neutral gear angular range is expressed as into -12~12 degree of degree with dotted line, actual capabilities are any -5~5 degree of degree.
Processing unit 402 judges gear rotating shaft 101 when on neutral position, processing unit 402 indicate indicating circuit 404 to
Neutral position signal is sent outside sensing device 103.
It should be noted that due to when gear rotating shaft 101 is in neutral gear 2036, corresponding to the first length areas magnet 201
Respectively there is a simulation neutral gear benchmark letter in analog reference signal and the analog reference signal of the second length areas magnet 202 respectively
Number, therefore the electrical signal of reaction that ought be actually calculated is simulated in the range of any one in neutral gear reference signal 607,608 at 2
When, that is, represent that gear rotating shaft 101 is in neutral gear 2036.
It is the operation for sensing R file locations below：
In actual use, processing unit 402 calculates electrical signal of reaction, when electrical signal of reaction is in simulation R shelves benchmark letter
When in the range of numbers 606, processing unit 402 indicates that indicating circuit 404 produces R file location signals, comprises the following steps that：
In actual use, when gear rotating shaft 101 is in 5-R shelves operating positions, and turn left, cut from neutral gear 2036
When entering R shelves 204, sensing device 103 senses the magnetic induction intensity and/or Distribution of Magnetic Field of magnet arrangement 102, senses and produces tool
There are sinusoidal and cosine shape two magnetic induction intensity signals.
According to foregoing mathematical formulae, processing unit 402 believes two magnetic induction intensity with sinusoidal and cosine shape
Number it is converted into an electrical signal of reaction (output signal or a numerical value).The electrical signal of reaction should fall as shown in Figure 6 second
In type reference signal 602.
Processing unit 402 is by resulting electrical signal of reaction and the simulation R shelves reference signals that are stored in memory cell 403
606 are compared.When processing unit 402 judges obtained electrical signal of reaction in the range of simulation R shelves reference signal 606, processing
Unit 402 judges gear rotating shaft 101 in R file locations.
Processing unit 402 judges gear rotating shaft 101 when in R file locations, processing unit 402 indicate indicating circuit 404 to
Neutral position signal is sent outside sensing device 103.
Program, instruction set or the data of the operation of sensing neutral gear and R file locations can be stored in storage more than performing
In unit 403, and the unit 402 that can be processed is performed or called.
It is same the step-wise fashion of drive shift is just surveyed, actually measured induced signal can fall eventually to be believed in 1 grade of 3 grades of benchmark
In number 603,2 grades of 4 grades of reference signals 604 or 5 grades of reference signals 605.
Technical characteristic in each embodiment of foregoing description can be combined.Above is implementation of the present utility model
Example and accompanying drawing, above-described embodiment and accompanying drawing are not intended to limit interest field of the present utility model, all with identical technology hand
Section or implemented by the interest field that the claims below content covers, all without departing from category of the present utility model but
The interest field of applicant.
Claims (22)
1. a kind of sensor-based system for being used to sense gear rotating shaft position, the gear rotating shaft are provided with array gear in its axial direction
Position；The array gear positions are included along the axially arranged several neutral gears of the gear rotating shaft and in neutral gear both sides
What is be oppositely arranged is several to moving gear；One in the motion gear is reverse gear, and remaining gear is all forward, its
It is characterised by that the sensor-based system includes：
Sense magnets, the sense magnets are fixedly installed in the gear rotating shaft, with the gear pivot；The sensing
Magnet is being divided axially into the first length areas magnet and the second length areas magnet；The magnetic field side of the first length areas magnet
The side of gear shaft contacts described in Xiang Yu is the first polarity, is the second polarity in the side away from the gear rotating shaft；It is described
The magnetic direction of second length areas magnet is that the side of the gear shaft contacts is the second polarity, away from the gear
The side of rotating shaft is the first polarity；So as in the magnetic direction of the first length areas magnet and the magnetic in the second length areas magnet
Field direction is opposite；And
Sensing unit, the sensing unit are arranged to sense the changes of magnetic field during sense magnets motion；When the gear
When in operation change in location occurs for rotating shaft, the sensing unit senses the changes of magnetic field of the sense magnets, and produces correspondingly
Electrical signal of reaction；The electrical signal of reaction is compared with a predetermined benchmark electrical signal of reaction, to indicate the shelves
Position rotating shaft is in drive shift gear or reverse gear.
2. sensor-based system according to claim 1, it is characterised in that：
The first length areas magnet produces the changes of magnetic field of the first form；
The second length areas magnet produces the changes of magnetic field of the second form.
3. sensor-based system according to claim 2, it is characterised in that：
When the gear pivot to remaining one or more groups of drive shift gear, the sensing unit sense described
The changes of magnetic field of one form, to indicate corresponding drive shift gear；
When the gear pivot to reverse gear and corresponding drive shift gear, the sensing unit senses described
The changes of magnetic field of the second form, to indicate the reverse gear or corresponding drive shift gear.
4. sensor-based system according to claim 1, it is characterised in that the sensor-based system also includes：
Memory cell, the memory cell are used for the first kind reference signal prestored for the first length areas magnet
With the Second Type reference signal prestored for the second length areas magnet；
Processing unit, it is connected with the sensing unit and the memory cell, becomes for magnetic field will to be sensed from sensing unit
Change is converted into electrical signal of reaction, and by the electrical signal of reaction and the first kind reference signal and Second Type reference signal
It is compared, so as to judge that the gear rotating shaft is to be in drive shift gear or reverse gear.
5. sensor-based system according to claim 4, it is characterised in that：
The first kind reference signal be the first length areas magnet movement described in the advance analog sensing of the sensing unit and
Caused electrical signal of reaction；
The Second Type reference signal be the second length areas magnet movement described in the advance analog sensing of the sensing unit and
Caused electrical signal of reaction.
6. sensor-based system according to claim 5, it is characterised in that：
The first kind reference signal has several first signal criterion values, and several first signal criterion values represent multiple
The position of drive shift gear；
The Second Type reference signal has several secondary signal a reference values, and several secondary signal a reference values represent drive shift shelves
Position and the position of reverse gear；
The changes of magnetic field sensed from the sensing unit is converted into electrical signal of reaction by the processing unit, and by the sensing
Electric signal compared with several first signal criterion values and several secondary signal a reference values, so as to distinguish it is described before
Enter grade gear and reverse gear.
7. sensor-based system according to claim 6, it is characterised in that：
A benchmark in the electrical signal of reaction and several first signal criterion values and several secondary signal a reference values
When being worth identical or difference in the range of specific region, it is corresponding that the processing unit judges that the gear rotating shaft is in a reference value
Gear.
8. sensor-based system according to claim 7, it is characterised in that the sensor-based system also includes：
Indicating circuit, the indicating circuit are connected with the processing unit；
When the processing unit judges the gear rotating shaft for drive shift gear, the processing unit is by the indicating circuit
It is set to first state；
When the processing unit judges the gear rotating shaft for reverse gear, the processing unit puts the indicating circuit
Into the second state.
9. sensor-based system according to claim 8, it is characterised in that：
The indicating circuit sends state electric signal to vehicle control system, and the start and stop for vehicle control system engine are sentenced
It is disconnected.
10. sensor-based system according to claim 6, it is characterised in that：
The interior setting of axis both sides first rotational angle of the neutral gear along the gear rotating shaft；
The sensing unit first length areas magnet of sensing and the second length areas magnet are in the sky in the first rotational angle
Change of magnetic field strength and sensing electric signals are produced in shelves gear bands；
The first kind reference signal also has the first neutral gear a reference value for representing the first length areas magnet movement；
The Second Type reference signal also has the second neutral gear a reference value for representing the second length areas magnet movement；
The changes of magnetic field sensed from the sensing unit is converted into electrical signal of reaction by the processing unit, and by the sensing
Electric signal is compared with the first neutral gear a reference value and the second neutral gear a reference value, when the electrical signal of reaction and first
When neutral gear a reference value or same or about the second neutral gear a reference value, the processing unit judges that the gear turns
Axle is in the corresponding neutral gear of a reference value.
11. sensor-based system according to claim 1, it is characterised in that：
The second length areas magnet corresponds to the reverse gear and corresponding drive shift gear；
The first length areas magnet corresponds to remaining drive shift gear.
12. sensor-based system according to claim 1, it is characterised in that：
The second length areas magnet length is the 1/2 of the first length areas magnet length.
13. sensor-based system according to claim 1, it is characterised in that：
The sensing unit is a single Hall sensing unit.
14. sensor-based system according to claim 1, it is characterised in that：
The sensing unit is Hall sensing unit.
15. sensor-based system according to claim 1, it is characterised in that：
The array gear positions are three pairs of gears, are respectively：
First pair of gear be：1 grade of gear and 2 grades of gears；
Second pair of gear be：3 grades of gears and 4 grades of gears；
3rd pair of gear be：5 grades of gears and R shelves gears,
Wherein 1 grade, 2 grades, 3 grades, 4 grades and 5 grades gear is drive shift, and R shelves are reverse gear.
16. sensor-based system according to claim 1, it is characterised in that：
The axial direction of the first length areas magnet and the second length areas magnet along the rotating shaft is arranged in order setting.
17. sensor-based system according to claim 1, it is characterised in that：
The sense magnets are formed in one part.
18. sensor-based system according to claim 1, it is characterised in that：
The relatively described sense magnets of the sensing unit are arranged to：When the gear rotating shaft is in a selected neutral gear,
The sensing unit and radially aligned of the sense magnets along the gear rotating shaft.
19. sensor-based system according to claim 4, it is characterised in that：
The first kind reference signal and the Second Type reference signal are misaligned.
20. sensor-based system according to claim 19, it is characterised in that：
The greatest measure of the first kind reference signal is less than the minimum value of the Second Type reference signal.
21. sensor-based system according to claim 4, it is characterised in that：
The first kind reference signal and the Second Type reference signal for voltage signal, duty cycle signals or unilateral
Nibble transmission signal.
22. sensor-based system according to claim 4, it is characterised in that：
The electrical signal of reaction is voltage signal, duty cycle signals or unilateral nibble transmission signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108953595A (en) * | 2017-05-18 | 2018-12-07 | 泰科电子(上海)有限公司 | For sensing the sensor-based system of gear rotating shaft position |
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