CN107576811A - Wheel speed detection device and detection method - Google Patents

Wheel speed detection device and detection method Download PDF

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Publication number
CN107576811A
CN107576811A CN201610525008.9A CN201610525008A CN107576811A CN 107576811 A CN107576811 A CN 107576811A CN 201610525008 A CN201610525008 A CN 201610525008A CN 107576811 A CN107576811 A CN 107576811A
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CN
China
Prior art keywords
signal
square
rotational speed
vehicle wheel
wheel
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Pending
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CN201610525008.9A
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Chinese (zh)
Inventor
肖艳杰
石永福
陈映杰
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to CN201610525008.9A priority Critical patent/CN107576811A/en
Priority to PCT/CN2017/090436 priority patent/WO2018006729A1/en
Publication of CN107576811A publication Critical patent/CN107576811A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

A wheel rotation speed detection device and a detection method, wherein: the device comprises a hub motor, an excitation unit and a rotary transformer; the rotary transformer receives an alternating excitation signal from the excitation unit to monitor the rotating speed of the motor and generate an output signal containing the rotating speed information of the motor; the wheel speed detection method includes: and converting the output signal into a square wave signal, wherein the square wave signal is an ABS input signal corresponding to the rotating speed of the wheel. According to the technical scheme, the output signal of the rotary transformer is converted to detect the rotating speed of the wheel, so that the traditional scheme that the rotating speed of the wheel is detected by a wheel rotating speed sensor is replaced. The hub motor, the rotary transformer and the excitation unit are all integrated in the wheel, and the conversion unit belongs to an electronic device and occupies a small space. Therefore, the wheel speed detection device can omit a wheel speed sensor, does not need additional external mechanical parts, does not change the mechanical structure of the wheel, and does not bring inconvenience to the wheel structure and the wheel layout.

Description

Vehicle wheel rotational speed detection means and detection method
Technical field
The present invention relates to wheel hub motor technical field, more particularly to a kind of vehicle wheel rotational speed detection dress being used in wheel hub motor Put and detection method.
Background technology
In Motor Vehicle Braking Procedure, anti-lock braking system (Antilock Brake System, abbreviation ABS) can basis The wheel rotation speed signals of wheel speed sensor input judge whether wheel tends to locking, so as to be made whether to send anti-lock control Signal processed.
At present, in wheel hub motor technical field, wheel speed sensor is installed on wheel, wheel speed sensor is used To test vehicle wheel rotational speed, and it is sent to ABS.The operation principle of wheel speed sensor is:Wheel speed sensor includes magnetic Coil and inductive component.Magnetic gear ring is arranged on wheel, and magnetic gear ring and wheel are coaxial, and the quantity of tooth is w in magnetic gear ring. Along the radial direction of magnetic gear ring, inductive component is arranged at intervals with magnetic gear ring.When magnetic gear ring is with vehicle wheel rotation, inductive component can Changed with induced field, and the sine wave of the tooth generation a cycle to magnetropism gear ring., can when vehicle wheel rotation one encloses To produce w sine wave, therefore vehicle wheel rotational speed can correspond to the quantity of caused sine wave in the unit interval.Afterwards, sine wave It is converted into square wave and is sent to ABS.ABS produces the number that high level is read in the cycle and is occurred in each square-wave signal, and then Judge whether wheel tends to locking.
The square-wave signal of this corresponding vehicle wheel rotational speed has the following problems:Wheel speed sensors are outside machinery relative to wheel Part.Therefore, it is necessary to which extra adapter carrys out fixing vehicle wheel speed probe in wheel, this can influence car wheel structure and to wheel The layout of upper-part is made troubles.
The content of the invention
The present invention solves the problems, such as, in existing wheel hub motor technical field, vehicle wheel rotational speed detection method, wheel speed sensing Device is relative to wheel for outside mechanical part, it is necessary to which extra adapter carrys out fixing vehicle wheel speed probe in wheel, this meeting shadow Ring car wheel structure and the layout to wheel upper-part is made troubles.
To solve the above problems, the present invention provides a kind of vehicle wheel rotational speed detection means, it is integrated with wheel:Wheel hub electricity Machine, exciting unit and rotary transformer, the wheel hub motor connect the wheel to drive the vehicle wheel rotation;The rotation becomes Depressor connects the wheel hub motor, and receives alternating excitation signal from the exciting unit to monitor motor speed, and generation includes The output signal of motor speed information;The vehicle wheel rotational speed detection means is integrated in the wheel, including:Converting unit, use In producing square-wave signal according to the output signal, the square-wave signal is the ABS input signals of corresponding vehicle wheel rotational speed.
Alternatively, the vehicle wheel rotational speed detection means also includes:Demodulator, for receiving the output signal and the friendship Become pumping signal, and demodulate the envelope signal of the corresponding motor speed;The converting unit is used for:Receive the envelope letter Number and be converted into the square-wave signal.
Alternatively, the converting unit includes:Arithmetic element, for receiving the envelope signal and often believing through a square wave Number producing computation of Period obtains producing the phase angle signal in the cycle corresponding to wheel steering angle in the square-wave signal;Square wave produces Unit, the square-wave signal is produced for producing the phase angle signal in the cycle according to each square-wave signal.
Alternatively, the converting unit includes:Arithmetic element, for receiving the envelope signal of the corresponding motor speed simultaneously The envelope signal of corresponding vehicle wheel rotational speed is calculated;Square wave generation unit, for by the envelope signal of the corresponding vehicle wheel rotational speed Be converted to the square-wave signal.
Alternatively, the arithmetic element and the square wave generation unit integrate.
Alternatively, the demodulator, the converting unit and the exciting unit are integrated in same housing.
Alternatively, the exciting unit is additionally operable to:Receive the output signal of the rotary transformer and demodulate motor and turn Fast signal;The converting unit is used for:Receive the motor speed signal and be converted to the square-wave signal.
The present invention also provides a kind of vehicle wheel rotational speed detection method, is integrated with wheel:Wheel hub motor, exciting unit and rotation Change depressor, the wheel hub motor connects the wheel to drive the vehicle wheel rotation;The rotary transformer connects the wheel Hub motor, and for receiving alternating excitation signal from the exciting unit to monitor motor speed, produce and believe comprising motor speed The output signal of breath;The vehicle wheel rotational speed detection method includes:The output signal is converted into square-wave signal, the square wave letter Number for corresponding vehicle wheel rotational speed ABS input signals.
Alternatively, the output signal is converted to the method for square-wave signal to be included:Utilize the output signal and described Alternating excitation signal demodulates the envelope signal of corresponding motor speed;The envelope signal is converted into the square-wave signal.
Alternatively, the envelope signal is converted into the method for the square-wave signal to be included:According to the envelope signal, often Computation of Period is produced through a square-wave signal to obtain producing the phase angle in the cycle corresponding to wheel steering angle in the square-wave signal Signal;The phase angle signal produced according to each square-wave signal in the cycle produces the square-wave signal.
Alternatively, the envelope signal is converted into the method for the square-wave signal to be included:The corresponding motor is received to turn The envelope signal of speed and the envelope signal that corresponding vehicle wheel rotational speed is calculated;The envelope signal of the corresponding vehicle wheel rotational speed is changed For the square-wave signal.
Alternatively, the exciting unit receives the output signal of the rotary transformer and demodulates motor speed signal; The vehicle wheel rotational speed detection method also includes:Receive the motor speed signal and be converted into the square-wave signal.
Compared with prior art, technical scheme has advantages below:
The technical program carries out conversion process to detect vehicle wheel rotational speed using the output signal of rotary transformer, can substitute The traditional scheme of vehicle wheel rotational speed is detected using wheel speed sensor.In wheel hub motor technology, wheel hub motor, rotation transformation Device and exciting unit are integrated in wheel, and converting unit belongs to electronic device, compared to wheel speed sensor space-consuming It is very small.Therefore, vehicle wheel rotational speed detection means can give up wheel speed sensor, it is not necessary to extra outside mechanical part, The mechanical structure of wheel will not be changed, car wheel structure and wheel configuration will not be changed substantially, will not be to car wheel structure and wheel cloth Office makes troubles.
Brief description of the drawings
Fig. 1 is the structural representation of the vehicle wheel rotational speed detection means of the specific embodiment of the invention;
Fig. 2 is the flow chart of the vehicle wheel rotational speed detection method of the specific embodiment of the invention;
In Fig. 3, Fig. 3 (a) is alternating excitation signal caused by wheel underexcitation unit, and Fig. 3 (b) is wheel internal rotation transformation One output signal of device;
Fig. 4 is a kind of conversion corresponding pass of the envelope signal with the square-wave signal of corresponding vehicle wheel rotational speed of corresponding motor speed System;
Fig. 5 is the structure chart of converting unit in vehicle wheel rotational speed detection means shown in Fig. 1.
Embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.
Reference picture 1, in wheel hub motor technology, it is integrated with wheel:Wheel hub motor (not shown), exciting unit 2 and rotary transformer 1, wheel hub motor connection wheel is rotated with driving moment.Exciting unit 2 provides alternating excitation signal, rotation Transformer 1 connects wheel hub motor, and receives alternating excitation signal from exciting unit 2 to monitor motor speed, and generation includes motor The output signal of rotary speed information.
The rotor of rotary transformer 1 is mechanically connected to the rotor of motor with fixed rotating ratio, and the rotor of motor is with fixation Rotating ratio be mechanically connected to wheel, there is fixed rotating ratio each other in rotary transformer 1, rotor and wheel, Therefore vehicle wheel rotational speed detection method can include:The output signal of rotary transformer 1 is converted into square-wave signal, the square-wave signal For the ABS input signals of corresponding vehicle wheel rotational speed.
The technical program carries out conversion process to detect vehicle wheel rotational speed, Ke Yiqu using the output signal of rotary transformer 1 In generation, detects the traditional scheme of vehicle wheel rotational speed using wheel speed sensor.Wheel hub motor, rotary transformer 1 and exciting unit 2 It is the integrated component in wheel, it is not necessary to extra outside mechanical part, it is not necessary to which the mechanical structure progress to wheel is any Improve, therefore the vehicle wheel rotational speed detection method of the technical program will not make troubles car wheel structure and wheel configuration.
It should be noted that " square-wave signal of corresponding vehicle wheel rotational speed " is the square-wave signal for including vehicle wheel rotational speed information.Ginseng Vehicle wheel rotational speed detection method in the prior art is examined, wheel often rotates 360 °, and wheel speed sensor can produce w square wave letter Number, the rotating speed of wheel can correspond to the quantity of caused sine wave in the unit interval.Therefore, the technical program will rotate transformation When the output signal of device 1 is converted to " square-wave signal of corresponding vehicle wheel rotational speed ", w can be received with wheel every revolution ABS Individual square-wave signal is that reference is changed.Corresponding different automobile types, w is different, can be configured as the case may be.
With reference to Fig. 2, the output signal of rotary transformer 1 is converted to the method for square-wave signal to be included:Perform step S1, the alternating excitation signal exported using the output signal and exciting unit 2 of rotary transformer 1 demodulate corresponding motor speed Envelope signal;Step S2 is performed, the envelope signal is converted into the square-wave signal of corresponding vehicle wheel rotational speed.
With reference to Fig. 3 (a), Fig. 3 (a) is alternating excitation signal Ur (t)=Vsin ω t that exciting unit 2 exports, and the alternation swashs It is alternating voltage to encourage signal Ur (t).With reference to Fig. 3 (b), Fig. 3 (b) be rotary transformer 1 an output signal U s (t, θ)= Vsin ω tsin θ, θ are the corner of rotary transformer 1.
The stator relative wheel of rotary transformer 1 is static, and the rotor of rotary transformer 1 and the rotor of motor connect.Rotation There is ρ number of pole-pairs in transformer 1, therefore, motor per revolution, rotary transformer 1 exports ρ sine wave, and the θ is should The phase angle of sine wave.Therefore, the principle of motor speed is detected according to rotary transformer 1, the θ is not motor corner, but can With corresponding motor speed, Us (t, θ) envelope signal Vsin θ include motor speed information.Ur (t) and Us (t, θ) are obtained simultaneously, The envelope signal U comprising motor speed can be demodulated from Us (t, θ)S1(t, θ)=Vsin θ.
Step S2 is performed, the envelope signal is converted into the method for square-wave signal to be included:
First, according to envelope signal US1(t, θ)=Vsin θ, often produce period Δ t through a square-wave signal and be calculated The square-wave signal produces the phase angle signal corresponding to wheel steering angle α in period Δ tAfterwards, produced according to each square-wave signal Phase angle signal in raw period Δ tProduce the square-wave signal.
Produced in a square-wave signal in period Δ t, initial time t1, the termination time is t2, Δ t=t2-t1.First Begin time t1, US11(t1, θ)=Vsin θ (t1), θ (t1) is tried to achieve using arcsine formula.Terminating time t2, US12(t2, θ) =Vsin θ (t2), θ (t2) is tried to achieve using arcsine formula.Produced in the square-wave signal in period Δ t, rotary transformer 1 turns Angle Δ θ=θ (t2)-θ (t1).
The rotor per revolution of motor, rotary transformer 1 export ρ sine wave, the ratio between motor speed and vehicle wheel rotational speed For s, wheel steering angle α=Δ θ/(ρ * s) can be calculated.Wheel per revolution is set, ABS can receive w square wave letter Number, the phase angle corresponding to αTherefore,
Calculate and produced in a square-wave signal in period Δ t,The periodicity of corresponding sine wave is:N is integer and R is remainder.Therefrom round numbers N, be converted to N number of cycle square wave and export.Each square wave letter The initial time for number producing period Δ t produces the period Δ t termination time for a upper square-wave signal, and each square-wave signal produces The period Δ t time that terminates is the initial time that next square-wave signal produces period Δ t.
Therefore, with reference to Fig. 4, Fig. 4 is the envelope signal U of corresponding motor speedS1The one of (t, θ)=Vsin θ and square-wave signal Kind corresponding relation, period Δ t can be produced in continuous square-wave signal and persistently produce square-wave signal.Produced in each square-wave signal It is calculated in period Δ tIn the periodicity of corresponding sine wave, remainder R can be included in next square-wave signal and produce week In phase Δ t.
Period Δ t is produced every a square-wave signal and produces a square-wave signal, and caused square-wave signal can wrap every time Include N number of cycle square wave.ABS produces period Δ t every a square-wave signal and receives a square-wave signal, and reads high level appearance Number, and then judge whether wheel tends to locking.
Optionally, the envelope signal of corresponding motor speed is converted into the method for corresponding square-wave signal to be wrapped Include:First, receive the envelope signal of corresponding motor speed and the envelope signal of corresponding vehicle wheel rotational speed is calculated;Afterwards, will be right The envelope signal of vehicle wheel rotational speed is answered to be converted to square-wave signal.It refer to previously for corresponding between motor speed and vehicle wheel rotational speed Relation, the envelope signal of corresponding vehicle wheel rotational speed can directly be calculated according to the envelope signal of corresponding motor speed.Corresponding car The envelope signal of wheel speed is sine wave, the sine wave directly can be converted into square wave.
In addition, exciting unit 2 also receives the output signal of rotary transformer 1 and demodulates motor speed signal.Therefore, make For alternative, according to motor speed and the corresponding relation of vehicle wheel rotational speed, vehicle wheel rotational speed detection method can also include:From excitation Unit receives the motor speed signal and is converted into the square-wave signal.Using the alternative, without specially becoming to rotation The output signal of depressor is demodulated, and directly utilizes the motor speed signal of exciting unit output, it is possible to be converted to ABS institutes The square-wave signal needed.
The output signal of rotary transformer 1 includes Vsin ω tsin θ and Vsin ω tcos θ, can utilize Vsin ω Tsin θ are converted to the square-wave signal of corresponding vehicle wheel rotational speed.Optionally, can also be changed using Vsin ω tcos θ To the square-wave signal of corresponding vehicle wheel rotational speed, it now should be noted that there is phase difference between cosine wave and sine wave, in the side of being converted to Delay is had during ripple, therefore is needed in transfer process into horizontal phasing control to obtain satisfactory square-wave signal.
Reference picture 1, vehicle wheel rotational speed detection means can include:Rotary transformer 1, exciting unit 2 and converting unit 3.Rotation Transformation depressor 1 communicates with exciting unit 2, and exciting unit 2 exports alternating excitation signal and produced to rotary transformer 1, rotary transformer 1 The raw output signal comprising motor speed information simultaneously feeds back to exciting unit 2.
Converting unit 3 communicates with rotary transformer 1, is used for:Square wave letter is produced according to the output signal of rotary transformer 1 Number, the square-wave signal is the ABS input signals of corresponding vehicle wheel rotational speed.
Wheel hub motor, rotary transformer 1 and exciting unit 2 are integrated in wheel, and vehicle wheel rotational speed detection means make use of The output signal of rotary transformer 1 in wheel carries out conversion process to detect vehicle wheel rotational speed, and this can give up traditional wheel Speed probe.Moreover, converting unit 3 belongs to electronic device, it is very small compared to wheel speed sensor space-consuming.Cause This, this vehicle wheel rotational speed detection means does not need extra outside mechanical part, will not change the mechanical structure of wheel, therefore this skill The vehicle wheel rotational speed detection means of art scheme will not change car wheel structure and wheel configuration substantially, will not be to car wheel structure and wheel cloth Office makes troubles.
Rotation speed detector also includes:Demodulator 4, for receiving alternating excitation signal and from rotation from exciting unit 2 The Rreceive output signal of transformer 1, to demodulate the envelope signal of corresponding motor speed from the output signal of rotary transformer 1. Converting unit 3 is used for:Receive the envelope signal and be converted into the square-wave signal of corresponding vehicle wheel rotational speed, and the square-wave signal is sent out Give ABS.
Demodulator 4 and converting unit 3 can be integrated on a pcb board, and pcb board space-consuming is very small, Bu Huiying Ring car wheel structure and influence wheel configuration.Afterwards, the pcb board can be integrated in exciting unit 2, will not thus take it again His space.
With reference to Fig. 5, converting unit 3 includes:Arithmetic element 30 and square wave generation unit 31.Arithmetic element 30 is used for:From solution Adjust device 4 to receive envelope signal and often produce computation of Period through a square-wave signal to obtain producing car in the cycle in the square-wave signal The phase angle signal corresponding to corner is taken turns, operation method may be referred to the related content of vehicle wheel rotational speed detection method above.Square wave Generation unit 31 is used for:The phase angle signal produced according to each square-wave signal in the cycle produces square-wave signal, produces square wave letter Number specific method may be referred to the related content of vehicle wheel rotational speed detection method above.
Arithmetic element 30 and square wave generation unit 31 can integrate, such as can be integrated in a micro-control unit In (Microcontroller Unit, abbreviation MCU), space-consuming is very small.The MCU can be integrated in together with exciting unit 2 In one housing.
Optionally, arithmetic element 30 can be used for:Receive the envelope signal of corresponding motor speed and be calculated The envelope signal of corresponding vehicle wheel rotational speed;Square wave generation unit 31 can be used for:The envelope signal of corresponding vehicle wheel rotational speed is converted to Square-wave signal.
Exciting unit 2 can be integrated in electric power controller (Power Electronic Unit, abbreviation PEU), with Alternating excitation signal is provided.ADI series demodulation chips are also integrated with PEU, the ADI series demodulation chip, which is used to receive, to be rotated The output signal of transformer 1 simultaneously demodulates motor speed signal.Therefore, optionally, converting unit can be directly with swashing Encourage unit 2 to communicate, for receiving motor speed signal from exciting unit 2 and being converted to the square-wave signal.Demodulator 4, conversion Unit 3 and exciting unit 2 can be integrated in same housing, such as are integrated in PEU housing.So, demodulator 4 and conversion Unit 3 is effectively utilized PEU arrangement space, and without distributing extra arrangement space for demodulator 4 and converting unit 3, this is aobvious Write the influence reduced to car wheel structure and wheel configuration.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute The scope of restriction is defined.

Claims (12)

1. a kind of vehicle wheel rotational speed detection means, is integrated with wheel:Wheel hub motor, exciting unit and rotary transformer, it is described Wheel hub motor connects the wheel to drive the vehicle wheel rotation;
The rotary transformer connects the wheel hub motor, and receives alternating excitation signal from the exciting unit to monitor motor Rotating speed, produce the output signal for including motor speed information;
Characterized in that, the vehicle wheel rotational speed detection means is integrated in the wheel, including:
Converting unit, for producing square-wave signal according to the output signal, the square-wave signal is the ABS of corresponding vehicle wheel rotational speed Input signal.
2. vehicle wheel rotational speed detection means as claimed in claim 1, it is characterised in that also include:Demodulator,
For receiving the output signal and the alternating excitation signal, and demodulate the envelope signal of corresponding motor speed;
The converting unit is used for:Receive the envelope signal and be converted into the square-wave signal.
3. vehicle wheel rotational speed detection means as claimed in claim 2, it is characterised in that the converting unit includes:
Arithmetic element, obtained for receiving the envelope signal and often producing computation of Period through a square-wave signal in the square wave Signal produces the phase angle signal corresponding to wheel steering angle in the cycle;
Square wave generation unit, the side is produced for producing the phase angle signal in the cycle according to each square-wave signal Ripple signal.
4. vehicle wheel rotational speed detection means as claimed in claim 2, it is characterised in that the converting unit includes:
Arithmetic element, for receiving the envelope signal of the corresponding motor speed and the envelope letter of corresponding vehicle wheel rotational speed being calculated Number;
Square wave generation unit, for the envelope signal of the corresponding vehicle wheel rotational speed to be converted into the square-wave signal.
5. the vehicle wheel rotational speed detection means as described in claim 3 or 4, it is characterised in that the arithmetic element and the square wave Generation unit integrates.
6. vehicle wheel rotational speed detection means as claimed in claim 2, it is characterised in that the demodulator, the converting unit and The exciting unit is integrated in same housing.
7. vehicle wheel rotational speed detection means as claimed in claim 1, it is characterised in that the exciting unit is additionally operable to:Receive institute State the output signal of rotary transformer and demodulate motor speed signal;The converting unit is used for:Receive the motor speed Signal is simultaneously converted to the square-wave signal.
8. a kind of vehicle wheel rotational speed detection method, is integrated with wheel:Wheel hub motor, exciting unit and rotary transformer, it is described Wheel hub motor connects the wheel to drive the vehicle wheel rotation;
The rotary transformer connects the wheel hub motor, and receives alternating excitation signal from the exciting unit to monitor motor Rotating speed, produce the output signal for including motor speed information;
Characterized in that, the vehicle wheel rotational speed detection method includes:The output signal is converted into square-wave signal, the square wave Signal is the ABS input signals of corresponding vehicle wheel rotational speed.
9. vehicle wheel rotational speed detection method as claimed in claim 8, it is characterised in that the output signal is converted into square wave letter Number method include:
The envelope signal of corresponding motor speed is demodulated using the output signal and the alternating excitation signal;
The envelope signal is converted into the square-wave signal.
10. vehicle wheel rotational speed detection method as claimed in claim 9, it is characterised in that be converted into the envelope signal described The method of square-wave signal includes:
According to the envelope signal, often produce computation of Period through a square-wave signal and obtain producing in the cycle in the square-wave signal Phase angle signal corresponding to wheel steering angle;
The phase angle signal produced according to each square-wave signal in the cycle produces the square-wave signal.
11. vehicle wheel rotational speed detection method as claimed in claim 9, it is characterised in that be converted into the envelope signal described The method of square-wave signal includes:
Receive the envelope signal of the corresponding motor speed and the envelope signal of corresponding vehicle wheel rotational speed is calculated;
The envelope signal of the corresponding vehicle wheel rotational speed is converted into the square-wave signal.
12. vehicle wheel rotational speed detection method as claimed in claim 8, it is characterised in that the exciting unit receives the rotation The output signal of transformer simultaneously demodulates motor speed signal;The vehicle wheel rotational speed detection method also includes:Receive the motor Tach signal is simultaneously converted into the square-wave signal.
CN201610525008.9A 2016-07-05 2016-07-05 Wheel speed detection device and detection method Pending CN107576811A (en)

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CN201610525008.9A CN107576811A (en) 2016-07-05 2016-07-05 Wheel speed detection device and detection method
PCT/CN2017/090436 WO2018006729A1 (en) 2016-07-05 2017-06-28 Wheel rotational speed detection apparatus and detection method

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Application Number Priority Date Filing Date Title
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CN112441079A (en) * 2019-08-29 2021-03-05 比亚迪股份有限公司 Rail train, vehicle-mounted controller and rail train speed measuring method and device
CN112441079B (en) * 2019-08-29 2022-05-13 比亚迪股份有限公司 Rail train, vehicle-mounted controller and rail train speed measuring method and device
CN112208543A (en) * 2020-09-25 2021-01-12 上海拿森汽车电子有限公司 Wheel speed estimation method and device and vehicle
CN112208543B (en) * 2020-09-25 2021-08-06 上海拿森汽车电子有限公司 Wheel speed estimation method and device and vehicle

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Application publication date: 20180112