CN106644460A - Electric vehicle and gearbox detection system and gearbox detection method thereof - Google Patents
Electric vehicle and gearbox detection system and gearbox detection method thereof Download PDFInfo
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- CN106644460A CN106644460A CN201610856187.4A CN201610856187A CN106644460A CN 106644460 A CN106644460 A CN 106644460A CN 201610856187 A CN201610856187 A CN 201610856187A CN 106644460 A CN106644460 A CN 106644460A
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- Prior art keywords
- gearbox
- rotating speed
- electric vehicle
- gear ratio
- motor
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/48—Drive Train control parameters related to transmissions
Abstract
The invention discloses a gearbox detection system of an electric vehicle. The detection system comprises a first rotation speed detecting device, a second rotation speed detecting device, and a control device. The first rotation speed detecting device is used for detecting a rotation speed of an input shaft of a gearbox; the second rotational speed detecting device is used for detecting a rotation speed of an output shaft of the gearbox; and the control device calculates a gear ratio of the gear box based on the rotation speed of the input shaft of the gearbox and the rotation speed of the output shaft of the gearbox and determines whether the gearbox is abnormal based on the gear ratio and a preset gear ratio. According to the gearbox detection system, whether a fault occurs at a gear box can be detected rapidly and effectively. In addition, the invention also discloses an electric vehicle using the gearbox detection system and a gearbox detection method of an electric vehicle.
Description
Technical field
The invention belongs to technical field of vehicle, more particularly to a kind of gearbox detecting system of electric vehicle, and have
The electric vehicle of the gearbox detecting system and the gearbox detection method of electric vehicle.
Background technology
With the development of electric and electronic technology, electric vehicle becomes increasingly popular and Electronic Development, the MCU of electric vehicle and
Motor is minimized and lightweight develops the favor for receiving more and more vehicle producers.In order to improve whole power drive system
Power density, high-speed electric expreess locomotive is widely applied with reference to the scheme of decelerator, and for example, some vehicles adopt 9.7:1 monodentate
Than reduction box, some vehicles adopt 8.3:1 monodentate is than reduction box etc..
Although high-speed electric expreess locomotive can be obviously improved the power density of power drive system with reference to decelerator scheme, exist
High-speed electric expreess locomotive exports the risk that axle fracture or reduction box are damaged, and in correlation technique, simply merely relies on motor tacho
To calculate gearbox rotating speed and car load speed, not enough quick and precisely.Therefore, how to judge to export the good of Spindle Status or reduction box
It is bad to become the key factor for affecting the system stability work.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
For this purpose, the present invention needs the gearbox detecting system for proposing a kind of electric vehicle, the gearbox detecting system can be with
Fast and effeciently detect gearbox whether failure.
The present invention also proposes the gearbox inspection of a kind of electric vehicle including the gearbox detecting system and electric vehicle
Survey method.
In order to solve the above problems, the gearbox detecting system of the electric vehicle that one aspect of the present invention is proposed, including：First
Speed detector, for detecting the rotating speed of the input shaft of gearbox；Second speed detector, for detecting the gearbox
Output shaft rotating speed；And control device, rotating speed and the speed change of the control device according to the input shaft of the gearbox
The rotating speed of the output shaft of case calculates the gear ratio of the gearbox, and judges the change according to the gear ratio and default gear ratio
Whether fast case is abnormal.
The gearbox detecting system of the embodiment of the present invention, by the first speed detector and the second speed detector point
Not Jian Ce gearbox input shaft rotating speed and the rotating speed of output shaft, and then control device calculate gearbox gear ratio, according to
Gear ratio and default gear ratio can determine whether whether gearbox is abnormal, can more quickly and efficiently determine the quality of gearbox,
It is time-consuming.
Wherein, the input shaft of the gearbox is connected with the motor of the electric vehicle, first speed detector
Detect the rotating speed of the motor using the rotating speed of the input shaft as the gearbox.
Further, the motor, including rotary transformer；First speed detector, including rotation change decoding electricity
Road module, the rotation becomes the rotation varying signal that decoding circuit module obtains the rotary transformer, and the rotation varying signal is carried out
Decode to obtain the rotating speed of the motor.
Further, second speed detector includes：Magnetic body module, the magnetic body module is arranged on the speed change
On the output shaft of case；Hall sensing module, the Hall sensing module is arranged on the casing of the gearbox, the Hall sense
Module is surveyed according to the magnetic field intensity output switching signal that magnetic field is produced by the magnetic body module, the control device is according to described
Switching signal calculates the rotating speed of the output shaft of the gearbox.
Specifically, the Hall sensing module includes hall position sensor or proximity Hall switch.
In addition, second speed detector also includes：Photoelectric isolating circuit, for the Hall sensing module is defeated
The omicronff signal transmission for going out is to the control device.
In addition, the gearbox detecting system also includes：Suggestion device, the control device is in the gear ratio beyond described
During default gear ratio, the gearbox exception is determined, control the suggestion device and pointed out.
Further, the control device is additionally operable to, and when it is determined that the gearbox is abnormal, controls the electric vehicle
Motor is out of service, can play a part of protection.
Based on the gearbox detecting system of above-mentioned aspect, the electric vehicle of another aspect of the present invention, including：Gearbox and electricity
Machine；And gearbox detecting system as described above.
The electric vehicle, by the gearbox detecting system using above-mentioned aspect embodiment, can be more quickly and efficiently
Detection gearbox whether failure.
In order to solve the above problems, another aspect of the invention propose electric vehicle gearbox detection method, including with
Lower step：The rotating speed of the output shaft of the rotating speed and the gearbox of the input shaft of the gearbox of electric vehicle is detected respectively；According to
The rotating speed of the output shaft of the rotating speed of the input shaft of the gearbox and the gearbox calculates the gear ratio of the gearbox；And
Judge whether the gearbox is abnormal according to the gear ratio and default gear ratio.
The gearbox detection method of the electric vehicle of the embodiment of the present invention, according to the rotating speed and speed change of the input shaft of gearbox
The rotating speed of the output shaft of case obtains the gear ratio of gearbox, can determine whether whether gearbox is different according to gear ratio and default gear ratio
Often, the quality of gearbox can more quickly and efficiently be determined, it is time-consuming.
Further, the rotating speed of the input shaft of the gearbox of electric vehicle is detected, including：Detection is defeated with the gearbox
Enter the rotating speed of the motor of the connected electric vehicle of axle, using the rotating speed of the input shaft as the gearbox.
Further, the rotating speed of the motor for detecting the electric vehicle being connected with the input shaft of the gearbox, including：
Obtain the rotation varying signal of the rotary transformer of the motor；The rotation varying signal is decoded and is turned with obtaining the motor
Speed.
Further, the rotating speed of the output shaft of the gearbox is detected, including：Obtain the switch of Hall sensing module output
Signal, wherein, the Hall sensing module is arranged on the casing of the gearbox, and the Hall sensing module is according to by magnetic
The magnetic field intensity of field exports the switching signal, and the magnetic field is produced by the magnetic body module being arranged on the output shaft of the gearbox
It is raw；And the rotating speed of the output shaft according to the switching signal calculating gearbox.
Further, judge whether the gearbox is abnormal according to the gear ratio and default gear ratio, including：Judge institute
Gear ratio is stated whether beyond the default gear ratio；If the gear ratio exceeds the default gear ratio, the speed change is determined
Case exception.
In addition, it is determined that after the gearbox exception, above-mentioned gearbox detection method also includes：Control suggestion device enters
Row prompting；And/or, the motor for controlling the electric vehicle is out of service, can play a part of protection.
Description of the drawings
Fig. 1 is the block diagram of the gearbox detecting system of electric vehicle according to embodiments of the present invention；
Fig. 2 is the operation principle schematic diagram of rotary transformer according to an embodiment of the invention；
Fig. 3 is the AD2S1200 chips of employing according to an embodiment of the invention and its schematic diagram of peripheral circuit；
Fig. 4 is the block diagram of the gearbox detecting system of electric vehicle according to an embodiment of the invention；
Fig. 5 is the second detection device operating diagram of a specific embodiment of the invention；
Fig. 6 is the block diagram of the gearbox detecting system of electric vehicle according to another embodiment of the invention；
Fig. 7 is the block diagram of electric vehicle according to embodiments of the present invention；And
Fig. 8 is the flow chart of the gearbox detection method of electric vehicle according to embodiments of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The electric vehicle and its gearbox detecting system of the embodiment of the present invention and gearbox detection method, can be effectively quick
Whether positioning motor output shaft ruptures or whether gearbox is abnormal, and then can most possibly reduce system damage degree,
And quick positioning question is located and can greatly shorten system detectio time, reduces cost.
The gearbox detecting system of the electric vehicle for proposing according to embodiments of the present invention, and tool are described with reference to the accompanying drawings
There are the electric vehicle and gearbox detection method of the gearbox detecting system.
Fig. 1 is the block diagram of the gearbox detecting system of electric vehicle according to an embodiment of the invention, such as Fig. 1 institutes
Show, the gearbox detecting system 100 of the electric vehicle includes the first speed detector 10, the second speed detector 20 and control
Device processed 30.
Wherein, the first speed detector 10 is used for the rotating speed of the input shaft for detecting gearbox；Second speed detector
20 be used for detect gearbox output shaft rotating speed；Control device 30 is defeated according to the rotating speed of the input shaft of gearbox and gearbox
The rotating speed of shaft calculates the gear ratio of gearbox, the i.e. ratio of the rotating speed of the rotating speed of input shaft and output shaft, and according to gear ratio
Judge whether gearbox is abnormal with default gear ratio.
It should be noted that between the rotating speed of the input shaft of gearbox and the rotating speed of output shaft existence anduniquess fixed no-load voltage ratio
Gear ratio is preset, this default gear ratio is set in Gearbox design, and for example, some vehicles adopt 9.7:1 is single
Than reduction box, some vehicles adopt 8.3 to tooth:1 monodentate is than reduction box etc..In gearbox normal work, output shaft and input shaft
Rotating ratio should meet the default gear ratio, so, may determine that gearbox is whether abnormal according to the gear ratio of gearbox, tool
For body, when control device 30 judges that the input shaft of gearbox is unsatisfactory for default gear ratio with the gear ratio of output shaft, then confirm
For gearbox exception.
As can be seen that the gearbox detecting system 100 of the embodiment of the present invention, by the first speed detector 10 and second
Speed detector 20 detects respectively the rotating speed and the rotating speed of output shaft of the input shaft of gearbox, and then control device 30 is calculated and become
The gear ratio of fast case, can determine whether whether gearbox is abnormal according to gear ratio and default gear ratio, can be more quickly and efficiently
Determine the quality of gearbox, it is time-consuming.
It is understood that the input shaft of gearbox is connected with the motor of electric vehicle, the input shaft rotating speed of speed changer with
The rotating speed of motor is corresponding, thus, in an embodiment of the present invention, the first speed detector 10 detects the rotating speed conduct of motor
The rotating speed of the input shaft of gearbox.Wherein, the first speed detector 10 includes that suitable for the present invention detection electricity can be realized
Any one detection means of machine rotating speed, for example, using reflection method, magnetoelectricity method, raster method or Hall switch method.
In one embodiment of the invention, the detection of motor speed is realized by the decoding to revolving varying signal.It is concrete next
Say, motor includes rotary transformer, is illustrated in figure 2 the operation principle of rotary transformer, and rotary transformer is a kind of electromagnetic type
Sensor, also known as synchronous decomposer.It is a kind of small-sized ac motor of measurement angle, for measuring turning for rotating object
Axis angular displacement and angular speed, are made up of stator and rotor.Wherein, stator winding (such as S1_S3, S2_S4 in Fig. 2) is used as rotation
The former limit of transformer, receives excitation voltage, and rotor windings (such as the R1_R2 in Fig. 2), as the secondary of rotary transformer, pass through
Electromagnetic coupled obtains induced voltage or induced potential revolves varying signal.
First speed detector 10 includes that rotation becomes decoding circuit module, and rotation becomes decoding circuit module and obtains rotary transformer
Rotation varying signal, and to revolve varying signal decoded to obtain the rotating speed of motor.Rotary transformer output is analog signal, can
It is decoded with the decoding chip for designing special, for example, rotation becomes decoding circuit module includes AD2S1200 chips, and Fig. 3 is
A kind of AD2S1200 chips and its peripheral circuit schematic diagram.The rotation varying signal of rotary transformer of the chip to obtaining is solved
Code, concrete decoding process is referred to related data, will not be described here, so as to output digit signals are the rotating speed letter of motor
Breath, that is, the rotating speed of the input shaft of gearbox.As can be seen that rotation becomes decoding circuit module has analog-digital conversion function.
For the detection of the rotating speed of the output shaft of gearbox, the second speed detector 20 can include being applied to the present invention
The detection means for realizing Rotating speed measring, for example with Hall detection method or other attainable methods.
With reference to the accompanying drawings to realizing that output shaft of gear-box Rotating speed measring is illustrated using Hall detection method.Such as Fig. 4
Shown, the second speed detector 20 includes magnetic body module 21 and Hall sensing module 22.
Wherein, magnetic body module 21 is arranged on the output shaft of gearbox, such as installed in rotary body output shaft of gear-box
Outer surface, it is to be understood that when gearbox works, magnetic body module 21 follows the output shaft rotation of gearbox.Hall is sensed
Module 22 is arranged on the casing of gearbox, i.e., Hall sensing module 22 is to fix non-rotary.Hall sensing module 22 is in
In the magnetic field that magnetic body module 21 is produced, when gearbox rotates, the magnetic field intensity of the detection of Hall sensing module 22 has strong and weak change
Change, and periodicity induced field Strength Changes, output switching signal.Hall sensing module 22 by magnetic body module 21 according to being produced
The magnetic field intensity output switching signal in magnetic field, control device 30 calculates the rotating speed of the output shaft of gearbox, class according to switching signal
Step-by-step counting is similar to, control device 30 is counted within a certain period of time to switching signal, and then gearbox can be conversed
The rotating speed of output shaft.
Specifically, Hall sensing module 22 can include hall position sensor or proximity Hall switch.For suddenly
Your position sensor, it include Hall element, Hall switch circuit, Hall linear circuit and various compensation and protection circuit,
This road component etc..As magnetic body module 21 follows the output shaft of gearbox to rotate, Hall element induced field Strength Changes, then
Cause being turned on and off for Hall switch circuit breaker in middle pipe, produce switching signal, control device 30 can switch letter according to giving
The rotating speed of the output shaft of number calculating gearbox.
For proximity Hall switch, it includes voltage-stablizer, Hall element, difference amplifier, Schmitt trigger and output
Level and various compensation and protection circuit.In the presence of the magnetic field that magnetic body module 21 is produced, when magnetic field intensity exceedes conducting threshold
When value is for example set to BOP, the output transistor conducting of proximity Hall switch exports low level.Magnetic field intensity gradually increases, Hall
The output transistor of proximity switch remains on state；If the magnetic field intensity that magnetic body module 21 is produced is reduced to cut-off threshold
During value BRP, the output transistor cut-off of proximity Hall switch exports high level.Proximity Hall switch exports high level or low electricity
Flat i.e. switching signal, and then control device 30 can calculate the rotating speed of the output shaft of gearbox according to switching signal.Wherein, typically
Ground, BOP is properly termed as operating point, and BRP is referred to as point of release, and BOP-BRP=BH is referred to as return difference, and the presence of return difference causes Hall to be close to
Switch has good antijamming capability.
In simple terms, become decoding circuit module by rotation to decode the rotation varying signal of the rotation transformer of motor, can
It is the rotating speed of the input shaft of gearbox with the rotating speed for obtaining motor, magnetic field is produced according to magnetic body module by Hall sensing module 22
Magnetic field intensity output switching signal, and then control device 30 can be calculated according to switching signal the output shaft of speed changer turn
Speed.In the case where the power drive system function of electric vehicle is good, the rotating speed of the input shaft of motor speed i.e. gearbox
Certain gear ratio is remained with the rotating speed of the output shaft of gearbox, such as 8.3:1；If the rotating speed of the input shaft of gearbox
Above-mentioned default gear ratio has been unsatisfactory for completely with the gear ratio of the rotating speed of output shaft, then it is assumed that gearbox is damaged or electricity
Machine exports axle fracture.
Wherein, in an embodiment of the present invention, the detection of the rotating speed of the output shaft of the detection of the rotating speed of motor and gearbox
It is separate, not only method of testing is completely independent for both measurements, and operation principle is also separate, therefore, will not
Because the original such as interfere and thus result in both and detect all failing, i.e. the rotating speed of the output shaft of the rotating speed of motor and gearbox can be with
Mutually check.In addition, the whole drivetrain of electric vehicle can also be improved by installing Hall sensing module 22 on gearbox
The reliability of system.
Further, as shown in figure 4, the second speed detector 20 also includes photoelectric isolating circuit 23, Phototube Coupling electricity
Road 23 is used for the omicronff signal transmission for exporting Hall sensing module 22 to control device 30.Specifically, photoelectric isolating circuit 23
The switching signal that Hall sensing module 22 is exported is converted to into optical signal, so convert optical signals to again electric signal and export to
Control device 30, plays a part of isolation transmission, is disturbed ability strong.
As shown in figure 5, magnetic body module 21 rotates with the output shaft of gearbox, magnetic of the Hall sensing module 22 according to sensing
The change output switching signal of field intensity, switching signal is transmitted to such as electric motor car of control device 30 by photoelectric isolating circuit 23
MCU control panel, wherein, be the partial circuit of photoelectric isolating circuit 23 in Fig. 4, broadcasting and TV isolation circuit 23 includes luminous two
Pole pipe D and resistance R, optical signal is converted to by light emitting diode D by the switching signal that Hall sensing module 22 is exported, and then will
The optical signal is converted to electric signal transmission to control device 30, and control device 30 is defeated according to the signal of change gearbox for receiving
The rotating speed of shaft.
In addition, as shown in fig. 6, the gearbox detecting system 100 of the electric vehicle also includes suggestion device 40, control device
30 when gear ratio is beyond default gear ratio, determines gearbox exception, and control suggestion device 40 is pointed out.For example, control dress
30 rotating speeds that the output shaft for obtaining gearbox is calculated according to the switching signal of the output of Hall sensing module 22 are put, and by being arranged on
The rotation of back end cover for motor becomes process circuit revolves and becomes decoding circuit module and calculate the defeated of the rotating speed that obtains motor i.e. gearbox
Enter the rotating speed of axle, and then calculate the gear ratio for obtaining gearbox, consider the gear ratio and default gear ratio, judge gearbox
During failure, fault-signal is pointed out by suggestion device 40, for example, exported fault-signal to the instrument board of electric vehicle
To be pointed out.
Furthermore, it is understood that control device 30 can be according to the relation of motor speed and the rotating speed of output shaft of gear-box, sentencing
It is disconnected which kind of safeguard measure taken, for example, control device 30 it is determined that during the abnormal output axle fracture of motor in other words of gearbox, control
The motor of electric vehicle processed is out of service.Appropriate protection is taken to be prevented effectively from the even car load of control device 30 unnecessary
Damage.
In a word, the gearbox detecting system 100 of the embodiment of the present invention, by the rotating speed i.e. motor for comparing transmission input shaft
Rotating speed and output shaft of gear-box rotating speed, quickly, efficiently orientation problem can be located.
Based on the gearbox detecting system of above-mentioned aspect embodiment, describe with reference to the accompanying drawings according to a further aspect of the invention
The electric vehicle of embodiment.
Fig. 7 is the block diagram of electric vehicle according to an embodiment of the invention, as shown in fig. 7, the electric vehicle 1000 includes
The gearbox detecting system 100 of above-mentioned aspect embodiment, gearbox 200 and motor 300.
Wherein, in order to improve the power density of power drive system, motor 300 can adopt high-speed electric expreess locomotive.Gearbox is detected
The structure of system 100 and its process to gearbox detection are performed as described above the explanation of example, repeat no more here.
The electric vehicle 1000, by the gearbox detecting system 100 using above-mentioned aspect embodiment, can more accelerate
Speed, effectively detect the whether failure of gearbox 200.
The gearbox detection method of the electric vehicle of embodiment according to a further aspect of the present invention is described with reference to the accompanying drawings.
Fig. 8 is the flow chart of the gearbox detection method of electric vehicle according to embodiments of the present invention, as shown in figure 8, should
Gearbox detection method is comprised the following steps：
S1, detects respectively the rotating speed of the output shaft of the rotating speed and gearbox of the input shaft of the gearbox of electric vehicle.
S2, according to the rotating speed of the output shaft of the rotating speed and gearbox of the input shaft of gearbox the gear ratio of gearbox is calculated.
S3, judges whether gearbox is abnormal according to gear ratio and default gear ratio.For example, it is unsatisfactory in the gear ratio for calculating
During default gear ratio, gearbox exception is confirmed as.
The gearbox detection method of the electric vehicle of the embodiment of the present invention, according to the rotating speed and speed change of the input shaft of gearbox
The rotating speed of the output shaft of case obtains the gear ratio of gearbox, can determine whether whether gearbox is different according to gear ratio and default gear ratio
Often, the quality of gearbox can more quickly and efficiently be determined, it is time-consuming.
It is understood that the input shaft of gearbox is connected with the motor of electric vehicle, the input shaft rotating speed of speed changer with
The rotating speed of motor is corresponding, thus, the rotating speed of the input shaft of the gearbox of electric vehicle is detected, can be by detection and gearbox
The connected electric vehicle of input shaft motor rotating speed, using the rotating speed of the input shaft as gearbox.
Specifically, can be detected by the method for the rotating speed of any detection motor suitable for the present invention, for example,
Using reflection method, magnetoelectricity method, raster method or Hall switch method.In one embodiment of the invention, the inspection of motor speed
Survey and realized by the decoding to revolving varying signal.Specifically, the rotation varying signal of the rotary transformer of motor is obtained；Enter to revolving varying signal
Row decodes to obtain the rotating speed of motor.It is understood that rotary transformer output is analog signal, can design special
Decoding chip is decoded to it, for example, is solved using the rotation varying signal of rotary transformer of the AD2S1200 chips to obtaining
Code, output digit signals are the rotary speed information of motor, that is, the rotating speed of the input shaft of gearbox.
For the rotating speed of the output shaft of detection gearbox, any Rotating speed measring realized suitable for the present invention can be adopted
Detection method, for example with Hall detection method or other attainable methods.
To realize that output shaft of gear-box Rotating speed measring is illustrated using Hall detection method.Specifically, Hall sense is obtained
The switching signal of module output is surveyed, wherein, Hall sensing module is arranged on the casing of gearbox, and Hall sensing module is according to receiving
Magnetic field intensity to magnetic field exports the switching signal, and the magnetic field is produced by the magnetic body module being arranged on the output shaft of gearbox.
Then, the rotating speed of the output shaft of gearbox is calculated according to switching signal, for example, similar to step-by-step counting, control device is certain
Switching signal is counted in time, and then the rotating speed of the output shaft of gearbox can be conversed.
After the rotating speed of output shaft of rotating speed and gearbox that the rotating speed of input shaft of gearbox is motor is obtained, meter
The gear ratio of gearbox is calculated, and judges whether gearbox is abnormal, specifically, judges the change according to the gear ratio and default gear ratio
Whether speed is than meeting default gear ratio.It is understood that in the case where the power drive system function of electric vehicle is good, electricity
The rotating speed of the input shaft of machine rotating speed i.e. gearbox and the rotating speed of the output shaft of gearbox remain certain gear ratio i.e.
Default gear ratio, such as 8.3:1；If the gear ratio exceeds the default gear ratio e.g., less than or more than the default gear ratio,
It is understood that just thinking the gear ratio beyond default change when the gear ratio for obtaining reaches certain deviation with default gear ratio
Speed ratio, it is determined that the output axle fracture of gearbox exception or motor.
In addition, it is determined that after gearbox exception, suggestion device can be controlled and pointed out, such as fault message is passed through
The instrument board of electric vehicle is pointed out；The motor that electric vehicle can also be controlled is out of service, can avoid causing control dress
Put the even unnecessary damage of car load.
In the description of this specification, in flow chart or here any process described otherwise above or method description can
To be understood to, expression include it is one or more for realizing specific logical function or process the step of executable instruction
The module of code, fragment or part, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not
By order that is shown or discussing, including according to involved function by it is basic simultaneously in the way of or in the opposite order holding
Row function, this should be understood by embodiments of the invention person of ordinary skill in the field.
In flow charts expression or here logic described otherwise above and/or step, for example, are considered use
In the order list of the executable instruction for realizing logic function, in may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (as computer based system, the system including processor or other can hold from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or with reference to these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
The dress that defeated program is used for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：With the electricity that one or more are connected up
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can thereon print described program or other are suitable
Medium, because for example by carrying out optical scanner to paper or other media edlin, interpretation can then be entered or if necessary with it
His suitable method is processed to electronically obtain described program, in being then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realizing.For example, if realized with hardware, and in another embodiment, can be with well known in the art
Any one of row technology or their combination are realizing：With for realizing the logic gates of logic function to data-signal
Discrete logic, the special IC with suitable combinational logic gate circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Suddenly the hardware that can be by program to instruct correlation is completed, and described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (15)
1. the gearbox detecting system of a kind of electric vehicle, it is characterised in that include：
First speed detector, for detecting the rotating speed of the input shaft of gearbox；
Second speed detector, for detecting the rotating speed of the output shaft of the gearbox；With
Control device, the control device turns according to the output shaft of the rotating speed of the input shaft of the gearbox and the gearbox
Speed calculates the gear ratio of the gearbox, and judges whether the gearbox is abnormal according to the gear ratio and default gear ratio.
2. the gearbox detecting system of electric vehicle as claimed in claim 1, it is characterised in that the input shaft of the gearbox
It is connected with the motor of the electric vehicle, first speed detector detects the rotating speed of the motor using as the speed change
The rotating speed of the input shaft of case.
3. the gearbox detecting system of electric vehicle as claimed in claim 2, it is characterised in that
The motor, including rotary transformer；
First speed detector, including rotation change decoding circuit module, the rotation becomes decoding circuit module and obtains the rotation
The rotation varying signal of transformation depressor, and the rotation varying signal is decoded to obtain the rotating speed of the motor.
4. the gearbox detecting system of electric vehicle as claimed in claim 1, it is characterised in that the second Rotating speed measring dress
Put including：
Magnetic body module, the magnetic body module is arranged on the output shaft of the gearbox；
Hall sensing module, the Hall sensing module is arranged on the casing of the gearbox, the Hall sensing module root
According to the magnetic field intensity output switching signal that magnetic field is produced by the magnetic body module, the control device is according to the switching signal
Calculate the rotating speed of the output shaft of the gearbox.
5. the gearbox detecting system of electric vehicle as claimed in claim 4, it is characterised in that the Hall sensing module bag
Include hall position sensor or proximity Hall switch.
6. the gearbox detecting system of electric vehicle as claimed in claim 5, it is characterised in that the second Rotating speed measring dress
Putting also includes：
Photoelectric isolating circuit, for the omicronff signal transmission that exports the Hall sensing module to the control device.
7. the gearbox detecting system of electric vehicle as claimed in claim 1, it is characterised in that also include：
Suggestion device, the control device determines the gearbox exception when the gear ratio exceeds the default gear ratio,
Control the suggestion device to be pointed out.
8. the gearbox detecting system of electric vehicle as claimed in claim 7, it is characterised in that the control device is also used
In when it is determined that the gearbox is abnormal, the motor for controlling the electric vehicle is out of service.
9. a kind of electric vehicle, it is characterised in that include：
Gearbox and motor；And
Gearbox detecting system as described in any one of claim 1-8.
10. the gearbox detection method of a kind of electric vehicle, it is characterised in that comprise the following steps：
The rotating speed of the output shaft of the rotating speed and the gearbox of the input shaft of the gearbox of electric vehicle is detected respectively；
The change of the gearbox is calculated according to the rotating speed of the output shaft of the rotating speed and the gearbox of the input shaft of the gearbox
Speed ratio；And
Judge whether the gearbox is abnormal according to the gear ratio and default gear ratio.
The gearbox detection method of 11. electric vehicles as claimed in claim 10, it is characterised in that the change of detection electric vehicle
The rotating speed of the input shaft of fast case, including：
The rotating speed of the motor of the electric vehicle that detection is connected with the input shaft of the gearbox, using the input as the gearbox
The rotating speed of axle.
The gearbox detection method of 12. electric vehicles as claimed in claim 11, it is characterised in that described with the gearbox
The connected electric vehicle of input shaft motor rotating speed, including：
Obtain the rotation varying signal of the rotary transformer of the motor；
The rotation varying signal is decoded to obtain the rotating speed of the motor.
The gearbox detection method of 13. electric vehicles as claimed in claim 10, it is characterised in that the detection gearbox
The rotating speed of output shaft, including：
The switching signal of Hall sensing module output is obtained, wherein, the Hall sensing module is arranged on the case of the gearbox
On body, the Hall sensing module exports the switching signal according to the magnetic field intensity by magnetic field, and the magnetic field is by being arranged on
Magnetic body module on the output shaft of the gearbox is produced；And
The rotating speed of the output shaft of the gearbox is calculated according to the switching signal.
The gearbox detection method of 14. electric vehicles as claimed in claim 10, it is characterised in that according to the gear ratio and
Default gear ratio judges whether the gearbox is abnormal, including：
Judge the gear ratio whether beyond the default gear ratio；
If the gear ratio exceeds the default gear ratio, the gearbox exception is determined.
The gearbox detection method of 15. electric vehicles as claimed in claim 14, it is characterised in that it is determined that the gearbox
After exception, also include：
Control suggestion device is pointed out；And/or
The motor for controlling the electric vehicle is out of service.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610856187.4A CN106644460A (en) | 2016-09-27 | 2016-09-27 | Electric vehicle and gearbox detection system and gearbox detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610856187.4A CN106644460A (en) | 2016-09-27 | 2016-09-27 | Electric vehicle and gearbox detection system and gearbox detection method thereof |
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