CN110645348A

CN110645348A - Full gear sensor assembly

Info

Publication number: CN110645348A
Application number: CN201810667994.0A
Authority: CN
Inventors: 杨淑玲; 林丽安; 王文群
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2020-01-03

Abstract

The invention discloses a full-gear sensor assembly which comprises a magnet and a magnetic induction device, wherein the magnet is fixedly arranged on a gear shifting block, the magnetic induction device is fixedly arranged on the outer surface of a gear shifting cover, a single 3D Hall chip and a double 3D Hall chip are arranged in the magnetic induction device, the magnet respectively corresponds to the positions of the single 3D Hall chip and the double 3D Hall chip, and the single 3D Hall chip and the double 3D Hall chip are respectively connected with an automatic clutch controller through a processing circuit. The full-gear sensor assembly can detect signals of multiple dimensions at the same time, is compact in structure, easy to arrange, low in cost, free of any mechanical contact in the whole gear shifting process, simple in structure, long in service life and flexible in installation and design.

Description

Full gear sensor assembly

Technical Field

The invention relates to a sensor on an automobile, in particular to a full-gear sensor assembly.

Background

In the automatic clutch system, when a driver operates a gear shift lever, signals of a gear shift intention sensor are input to an electronic control system, a clutch is separated, the driver finishes gear shift action, after a speed changer is put into a gear, signals of a full-gear sensor are input to the control system, and the clutch is combined at different speeds according to throttle signals, the rotating speed of an engine and the speed of a vehicle, so that the clutch is combined as soon as possible under the condition of avoiding impact, and gear shift is finished.

A traditional gear sensor mainly adopts a force gear sensor, a piezoelectric type gear sensor and a Hall gear sensor. The force gear sensor and the piezoelectric gear sensor are contact sensors, and through contact trigger signals, contacts frequently slide, abrasion is generated, and poor contact is easily caused. In addition, multiple contacts are needed for multiple gears, and the design structure of the sensor is complex. The conventional hall gear sensor can only detect a magnetic field component in a direction perpendicular to the surface of the chip. The transmission gear-shifting control mechanism needs to move to select gears and rotate to shift gears, needs to detect signals (displacement and angle) of multiple dimensions at the same time, needs two to more than three common sensors in design, and is difficult to arrange the whole vehicle and high in cost.

Disclosure of Invention

The invention is accomplished in order to solve the deficiency in the prior art, the purpose of the invention is to provide a full-gear sensor assembly, can detect the signal of multiple dimensions at the same time, compact in construction, it is easy to arrange, the cost is reduced, there is not any mechanical contact in the whole gear shifting process, simple in construction, the life-span is high, the installation is designed flexibly.

The full-gear sensor assembly comprises a magnet and a magnetic induction device, wherein the magnet is fixedly arranged on a gear shifting block, the magnetic induction device is fixedly arranged on the outer surface of a gear shifting cover, a single 3D Hall chip and a double 3D Hall chip are arranged in the magnetic induction device, the magnet respectively corresponds to the single 3D Hall chip and the double 3D Hall chip in position, and the single 3D Hall chip and the double 3D Hall chip are respectively connected with an automatic clutch controller through a processing circuit.

A full range sensor assembly of the present invention may also be:

the magnetic induction device comprises a sensor shell and a circuit board fixedly arranged in the sensor shell, the circuit board is respectively provided with the single 3D Hall chip, the double 3D Hall chips and the processing circuit, and the sensor shell is detachably and fixedly connected with the outer surface of the gear shifting cover.

When the gear shifting block is positioned in a neutral gear, the center of the single 3D Hall chip, the center of the double 3D Hall chips, the center of the magnet and the rotation center of the gear shifting block are arranged on the same plane.

And one surface of the magnet opposite to the magnetic induction device is an arc surface.

And the magnetic induction device is provided with a connector, and the magnetic induction device is connected with the automatic clutch controller through the connector.

A first mounting hole for penetrating a bolt is formed in the sensor shell, and the magnetic induction device is connected with the gear shifting cover through the first mounting hole in a bolted mode.

The sensor shell is provided with a first positioning pin, and the magnetic induction device is connected with the gear shifting cover through the first positioning pin.

And a second mounting hole for penetrating a bolt is formed in the magnet, and the magnet is connected with the gear shifting block through the second mounting hole.

And a second positioning pin is arranged on the magnet, and the magnet is in pin connection with the gear shifting block through the second positioning pin.

The full-gear sensor assembly comprises a magnet and a magnetic induction device, wherein the magnet is fixedly arranged on a gear shifting block, the magnetic induction device is fixedly arranged on the outer surface of a gear shifting cover, a single 3D Hall chip and a double 3D Hall chip are respectively arranged in the magnetic induction device, the magnet respectively corresponds to the single 3D Hall chip and the double 3D Hall chip in position, and the single 3D Hall chip and the double 3D Hall chip are respectively connected with an automatic clutch controller through a processing circuit. Like this, magnetic induction system is in the magnetic field that magnet produced, and magnetic induction system can respond to the change of surrounding magnetic field through single 3D hall chip and two 3D hall chips, and single 3D hall chip and two 3D hall chips compare with traditional hall chip, have increased the magnetic field concentrator, and the magnetic field concentrator on single 3D hall chip and two 3D hall chips can be with the magnetic field conversion orthogonal magnetic field on the chip, makes single 3D hall chip and two 3D hall chips can respond to magnetic field magnetic flux B_X、B_YAnd B_ZComponent (X respectively)Magnetic field strengths in three directions of the X, Y, and Z directions), the magnetic field strengths in three directions (the X, Y, and Z directions) can be detected. When the gear is shifted, the magnet moves along with the gear shifting block, the magnet moves axially and rotates relative to the magnetic induction device (namely the position and the angle of the magnetic field change), the magnetic induction device detects the change of the surrounding magnetic field, different gear states can be judged by the change of the magnetic field, the magnetic induction device forms a linear relation (PWM signal) of duty ratio and angle/position change through a processing circuit and outputs the linear relation to the automatic clutch controller, and the automatic clutch controller judges the gear shifting intention of a driver according to the PMW signal to realize the detection of the gear shifting and gear selecting functions. Specifically, the PWM signals comprise two types of gear shifting signals and gear selecting signals, when a driver operates a gear shifting lever, the radial forward and reverse rotation movement of a gear shifting block drives a magnet to move forward and reverse to enter different gear shifting angles, the different gear shifting angles correspond to different gears, the gear shifting lever corresponds to one gear shifting angle when the gears are R, 1, 3 and 5, the gear shifting lever corresponds to another gear shifting angle when the gears are 2, 4 and 6, the gear shifting lever corresponds to another gear shifting angle when the gear shifting lever is N, a single 3D Hall chip is used for sensing the change of a magnetic field angle corresponding to the rotation of the magnet, the single 3D Hall chip collects the information of the change of the magnetic field angle corresponding to the rotation of the magnet, a linear relation between a duty ratio and the gear shifting angle is formed through a processing circuit, namely the gear shifting signals are output to an automatic clutch; the gear selecting function detection method comprises the steps that a gear shifting rod moves axially to drive a magnet to move axially to enter different gear selecting positions, the different gear selecting positions correspond to different gears, the gear shifting rod corresponds to four different gear selecting positions when the gear shifting rod is in an R gear, a 1 gear, a 2 gear, a 3 gear, a 4 gear and a 5 gear and a 6 gear respectively, the gear selecting positions correspond to the four different gear selecting positions respectively, double 3D Hall chips sense magnetic field position changes corresponding to the axial movement of the magnet, the double 3D Hall chips acquire information of the magnetic field position changes corresponding to the axial movement of the magnet, a linear relation between duty ratio and the gear selecting positions is formed through a processing circuit, namely a gear selecting signal, and the double 3D Hall chips output the. The magnetic induction device outputs the gear shifting signal and the gear selecting signal to the automatic clutch controller, and the automatic clutch controller judges the gear shifting intention of the driver according to the gear shifting signal and the gear selecting signalAnd the detection of the gear shifting and selecting functions is realized. Compared with the prior art, the device can detect signals (displacement and angle) of multiple dimensions simultaneously by only adopting one sensor, and has the advantages of compact structure, easy arrangement and low cost. In addition, no mechanical contact is generated in the whole gear shifting process, the structure is simple, the service life is long, and the magnetic induction device and the magnet are separately separated, so that the installation design is more flexible. Compared with the prior art, the full-gear sensor assembly has the following advantages: the gear shifting device can detect signals (displacement and angle) of multiple dimensions simultaneously, is compact in structure, easy to arrange, low in cost, free of any mechanical contact in the whole gear shifting process, simple in structure, long in service life and flexible in installation and design.

Drawings

Fig. 1 is a schematic structural diagram of a full-gear sensor assembly according to the present invention.

FIG. 2 is a front view of a magnetic induction device of a full-range sensor assembly according to the present invention.

FIG. 3 is a top view of a magnetic induction device of a full-range sensor assembly according to the present invention.

FIG. 4 is a magnet structure diagram of a full range sensor assembly according to the present invention.

FIG. 5 is a shift signal diagram of a full range sensor assembly according to the present invention.

FIG. 6 is a signal diagram of a gear selection of a full gear sensor assembly according to the present invention.

FIG. 7 is a two-dimensional duty cycle plot of gear selection and shifting for a full range sensor assembly of the present invention.

FIG. 8 is a schematic diagram of a full range sensor assembly in accordance with the present invention.

Description of the figures

1 … magnet 2 … magnetic induction device 3 … shift block

4 … shift cover 5 … connector 6 … first mounting hole

7 … first positioning pin 8 … second mounting hole 9 … second positioning pin

Detailed Description

A full range sensor assembly in accordance with the present invention is described in further detail below with reference to fig. 1-8.

Referring to fig. 1 to 8, the full-gear sensor assembly of the present invention includes a magnet 1 and a magnetic induction device 2, wherein the magnet 1 is fixedly disposed on a gear shift shifting block 3, the magnetic induction device 2 is fixedly disposed on an outer surface of a gear shift cover 4, a single 3D hall chip and a double 3D hall chip are disposed in the magnetic induction device 2, the magnet 1 respectively corresponds to the single 3D hall chip and the double 3D hall chip, and the single 3D hall chip and the double 3D hall chip are respectively connected to an automatic clutch controller through a processing circuit. Like this, magnetic induction system 2 is in the magnetic field that magnet 1 produced, magnetic induction system 2 can respond to the change of surrounding magnetic field through single 3D hall chip and two 3D hall chips, single 3D hall chip and two 3D hall chips compare with traditional hall chip, the magnetic field concentrator has been increased, the magnetic field on single 3D hall chip and two 3D hall chips can be turned into the quadrature magnetic field with the magnetic field on the chip to the magnetic induction concentrator, make single 3D hall chip and two 3D hall chips can respond to magnetic field magnetic flux B_X、B_YAnd B_ZThe components (magnetic field strengths in the three directions of X, Y and Z, respectively) of (a) can be detected. During gear shifting, the magnet 1 moves along with the gear shifting block 3, the magnet 1 moves axially and rotates relative to the magnetic induction device 2 (namely the position and the angle of a magnetic field change), the magnetic induction device 2 detects the change of the surrounding magnetic field, different gear states can be judged by the change of the magnetic field, the magnetic induction device 2 forms a linear relation (PWM signal) of duty ratio and angle/position change through a processing circuit and outputs the linear relation to the automatic clutch controller, and the automatic clutch controller judges the gear shifting intention of a driver according to the PMW signal to realize the detection of the gear shifting and gear selecting functions. Specifically, the PWM signals comprise two kinds of gear shifting signals and gear selecting signals, when a driver operates a gear shifting rod, the radial forward and reverse rotation movement of the gear shifting block 3 drives the magnet 1 to move forward and reverse in a rotating mode to enter different gear shifting angles, the different gear shifting angles correspond to different gears, the gear shifting rod corresponds to one gear shifting angle when the gear shifting rod is in R, 1, 3 and 5 gears, the gear shifting rod corresponds to the other gear shifting angle when the gear shifting rod is in 2, 4 and 6 gears, and the gear shifting rod corresponds to the gear shifting angleWhen the single 3D Hall chip corresponds to another gear shifting angle, the single 3D Hall chip is used for sensing the magnetic field angle change corresponding to the rotation of the magnet 1, the single 3D Hall chip acquires the information of the magnetic field angle change corresponding to the rotation of the magnet 1, a linear relation between duty ratio and the gear shifting angle is formed through a processing circuit, namely a gear shifting signal, and the single 3D Hall chip outputs the gear shifting signal to the automatic clutch controller to realize the detection of the gear shifting function; the gear selecting function detection method comprises the steps that a gear shifting rod moves axially to drive a magnet 1 to move axially to enter different gear selecting positions, the different gear selecting positions correspond to different gears, the gear shifting rod corresponds to four different gear selecting positions when the gear shifting rod is in an R gear, a 1 gear, a 2 gear, a 3 gear, a 4 gear and a 5 gear and a 6 gear respectively, the gear selecting positions correspond to the four different gear selecting positions respectively, double 3D Hall chips sense magnetic field position changes corresponding to the axial movement of the magnet 1, the double 3D Hall chips acquire information of the magnetic field position changes corresponding to the axial movement of the magnet 1, a linear relation between a duty ratio and the gear selecting positions is formed through a processing circuit, namely a gear selecting signal is formed, and the double 3D Hall. The magnetic induction device 2 outputs the gear shifting signal and the gear selecting signal to the automatic clutch controller, and the automatic clutch controller judges the gear shifting intention of the driver according to the gear shifting signal and the gear selecting signal to realize the detection of the gear shifting and gear selecting functions. Compared with the prior art, the device can detect signals (displacement and angle) of multiple dimensions simultaneously by only adopting one sensor, and has the advantages of compact structure, easy arrangement and low cost. In addition, no mechanical contact is generated in the whole gear shifting process, the structure is simple, the service life is long, and the magnetic induction device 2 and the magnet 1 are independently separated, so that the installation design is more flexible. Compared with the prior art, the full-gear sensor assembly has the following advantages: the gear shifting device can detect signals (displacement and angle) of multiple dimensions simultaneously, is compact in structure, easy to arrange, low in cost, free of any mechanical contact in the whole gear shifting process, simple in structure, long in service life and flexible in installation and design.

On the basis of the technical solutions described above, please refer to fig. 1 to 8, the full-gear sensor assembly of the present invention may further include: the magnetic induction device 2 comprises a sensor shell and a circuit board fixedly arranged in the sensor shell, the circuit board is respectively provided with the single 3D Hall chip, the double 3D Hall chips and the processing circuit, and the sensor shell is detachably and fixedly connected with the outer surface of the gear shifting cover 4. Like this, the sensor housing is used for being connected with shift lid 4 to single 3D hall chip and two 3D hall chips locate the sensor housing in, be favorable to the protection to the chip, single 3D hall chip, two 3D hall chips and processing circuit locate on the circuit board, the integrated level is high, and make single 3D hall chip and two 3D hall chips be in the coplanar, do not shelter from each other, are favorable to the detection of signal. On the basis of the above-described technical solution, it is further preferable that when the shift block 3 is located in the neutral position, the center of the single 3D hall chip, the center of the double 3D hall chip, the center of the magnet, and the rotation center of the shift block 3 are located on the same plane. Thus, because the center of the single 3D hall chip and the double 3D hall chip measure the shift signal by detecting the angle of the magnet 1 rotating in the forward and reverse directions and the magnetic field strength corresponding to the displacement, when the magnet 1 rotates around the rotation center of the shift dial 3, if the center deviates from the center of the sensor chip, the linearity error of the sensor assembly will be increased.

On the basis of the technical solutions described above, please refer to fig. 1 to 8, the full-gear sensor assembly of the present invention may further include: the magnet 1 and the one side that the magnetic induction device 2 is relative are the cambered surface. Thus, because the shape and size of the magnet 1 are mainly influenced by the performance and installation space of the sensor assembly, when the gap between the magnetic induction device 2 and the magnet 1 is larger, the same magnetizing mode is adopted, the arc-shaped magnet 1 is more preferable, and the linear error of the sensor assembly is smaller. In addition, the magnet 1 is arranged on the gear shifting block 3, and the cambered surface design is more beneficial to the arrangement of the magnet 1.

On the basis of the technical solutions described above, please refer to fig. 1 to 8, the full-gear sensor assembly of the present invention may further include: and a connector 5 is arranged on the magnetic induction device 2, and the magnetic induction device 2 is connected with the automatic clutch controller through the connector 5. Thus, the magnetic induction device 2 is connected with the automatic clutch controller by arranging the connector 5.

On the basis of the technical solutions described above, please refer to fig. 1 to 8, the full-gear sensor assembly of the present invention may further include: a first mounting hole 6 for penetrating a bolt is formed in the sensor shell, and the magnetic induction device 2 is connected with the gear shifting cover 4 through the first mounting hole 6 in a bolted mode. Therefore, the bolt connection is a detachable fixed connection which is widely used, and has simple structure, reliable connection and convenient assembly and disassembly. On the basis of the above-described technical solution, it is further preferred that a first positioning pin 7 is provided on the sensor housing, and the magnetic induction device 2 is pin-connected to the shift cover 4 through the first positioning pin 7. In this way, the first positioning pin 7 is provided to ensure that the magnetic induction device 2 is accurately installed.

On the basis of the technical solutions described above, please refer to fig. 1 to 8, the full-gear sensor assembly of the present invention may further include: and a second mounting hole 8 for penetrating a bolt is formed in the magnet 1, and the magnet 1 is connected with the gear shifting block 3 through the second mounting hole 8. Therefore, the bolt connection is a detachable fixed connection which is widely used, and has simple structure, reliable connection and convenient assembly and disassembly. On the basis of the above-described technical solution, it is further preferable that a second positioning pin 9 is provided on the magnet 1, and the magnet 1 is pin-connected to the shift block 3 through the second positioning pin 9. Thus, the second positioning pin 9 is provided to ensure the accurate mounting position of the magnet 1.

Specifically, when the full-gear sensor assembly is used for selecting gears, as shown in fig. 6, the magnet 1 moves axially, the movement of the magnet 1 corresponds to the magnetic field change of the double 3D hall chips, and linear duty ratio signals output at different gear selection positions are obtained through calculation. The gear selecting position corresponds to the R gear when the duty ratio is about 15%, the gear selecting position corresponds to the 1 gear and the 2 gear when the duty ratio is about 38%, the gear selecting position corresponds to the 3 gear and the 4 gear when the duty ratio is about 62%, and the gear selecting position corresponds to the 5 gear and the 6 gear when the duty ratio is about 85%. In addition, the sensor assembly simultaneously outputs two paths of PWM signals, the duty ratios of the two paths of signals are accumulated to obtain 1 when the gear is shifted to the same gear selecting position, one path of signals are master control signals, the other path of signals are monitoring and comparing signals, the accuracy and reliability of the signals are guaranteed, and misjudgment is reduced.

During gear shifting, as shown in fig. 5, the magnet 1 rotates in the radial direction and rotates in the forward and reverse directions to enter a gear, the magnet 1 rotates corresponding to the magnetic field change of the single 3D hall chip, and linear duty ratio signals output by different gear shifting angles are obtained through calculation. The gear shift lever is in N gear when the duty ratio is about 50%, the gear shift lever corresponds to 2, 4 and 6 gears when the duty ratio is about 15%, and the gear shift lever corresponds to R, 1, 3 and 5 gears when the duty ratio is about 85%.

As shown in FIG. 7, the full-gear sensor assembly calculates, calibrates, and calibrates a two-dimensional duty cycle table for gear selection and gear shifting through the gear selection and gear shifting duty cycle signals. And carrying out region division on the two-dimensional duty ratio table to obtain duty ratio values corresponding to different gears. And the automatic clutch controller judges the current gear according to the comparison between the calibration result of the full gear and the detection result of the real vehicle.

The method comprises the steps of applying a gear shifting signal of 50% +/-15% as an N gear, using 30% -35% and 65% -70% in the gear shifting process as gear selecting positions to judge, and judging specific gears according to different gear selecting duty ratios in gear shifting position duty ratios. Therefore, the calibration range of each gear of the sensor assembly covers the installation error, and the signal consistency is good.

The above description is only for the purpose of illustrating specific embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made in accordance with the spirit of the present invention should be considered as falling within the scope of the present invention.

Claims

1. A full-range sensor assembly, comprising: the automatic clutch control device comprises a magnet and a magnetic induction device, wherein the magnet is fixedly arranged on a gear shifting block, the magnetic induction device is fixedly arranged on the outer surface of a gear shifting cover, a single 3D Hall chip and a double 3D Hall chip are arranged in the magnetic induction device, the magnet respectively corresponds to the single 3D Hall chip and the double 3D Hall chip in position, and the single 3D Hall chip and the double 3D Hall chip are respectively connected with an automatic clutch controller through a processing circuit.

2. The full range sensor assembly of claim 1, wherein: the magnetic induction device comprises a sensor shell and a circuit board fixedly arranged in the sensor shell, the circuit board is respectively provided with the single 3D Hall chip, the double 3D Hall chips and the processing circuit, and the sensor shell is detachably and fixedly connected with the outer surface of the gear shifting cover.

3. The full range sensor assembly of claim 1, wherein: when the gear shifting block is positioned in a neutral gear, the center of the single 3D Hall chip, the center of the double 3D Hall chips, the center of the magnet and the rotation center of the gear shifting block are arranged on the same plane.

4. A full range sensor assembly according to any one of claims 1 to 3, wherein: and one surface of the magnet opposite to the magnetic induction device is an arc surface.

5. A full range sensor assembly according to any one of claims 1 to 3, wherein: and the magnetic induction device is provided with a connector, and the magnetic induction device is connected with the automatic clutch controller through the connector.

6. A full range sensor assembly according to any one of claims 1 to 3, wherein: a first mounting hole for penetrating a bolt is formed in the sensor shell, and the magnetic induction device is connected with the gear shifting cover through the first mounting hole in a bolted mode.

7. The full range sensor assembly of claim 6, wherein: the sensor shell is provided with a first positioning pin, and the magnetic induction device is connected with the gear shifting cover through the first positioning pin.

8. A full range sensor assembly according to any one of claims 1 to 3, wherein: and a second mounting hole for penetrating a bolt is formed in the magnet, and the magnet is connected with the gear shifting block through the second mounting hole.

9. The full range sensor assembly of claim 8, wherein: and a second positioning pin is arranged on the magnet, and the magnet is in pin connection with the gear shifting block through the second positioning pin.