EP3391000A1 - Verfahren zur drehmomentmessung einer antriebseinheit - Google Patents
Verfahren zur drehmomentmessung einer antriebseinheitInfo
- Publication number
- EP3391000A1 EP3391000A1 EP16760688.8A EP16760688A EP3391000A1 EP 3391000 A1 EP3391000 A1 EP 3391000A1 EP 16760688 A EP16760688 A EP 16760688A EP 3391000 A1 EP3391000 A1 EP 3391000A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- drive unit
- torque
- bearing
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/106—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving electrostatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
- G01L3/1407—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs
- G01L3/1428—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers
- G01L3/1435—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers involving magnetic or electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
- G01L3/1407—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs
- G01L3/1428—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers
- G01L3/1442—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers involving electrostatic means
Definitions
- the present invention relates to a method for torque measurement of a drive unit according to the independent method claim and to a measuring system for torque measurement of a drive unit according to the independent system claim.
- Powertrain applied torque required eg. B. for the calculation of the reference speed and the actual acceleration.
- this information is used for monitoring tasks (monitoring in torque path).
- these data are derived from models (air and gas)
- the inventive method allows a torque measurement during operation of a drive unit without the torque applied to a drive shaft to measure directly, which is associated with a high measurement cost.
- This is achieved in that at least one sensor measures a change in force and / or position, in particular a relative rotation of the drive unit as a sensor value. Due to a voltage applied to the drive unit torque, the drive unit moves in consequence of
- Position change in particular to measure a relative rotation of the drive unit in relation to the fixed support point.
- the inventive method provides additional information about the applied torque of the drive unit, which can be used to control, for example. Driving functions.
- the measured value can be used to monitor the set torque as well as to adjust other signals such as measured values of the machine currents or the rotor position angle.
- the torque generated by the drive unit results in a force change at the elastic bearing of the drive unit or at a relative one
- Position change in particular a relative rotation of the drive unit, compared to the fixed support point.
- a torque applied to the drive unit can be determined as the measured value.
- the measurement of the sensor value and the torque determined therefrom can be used as a quasi-stationary measurement of the torque and / or with the aid of a temporal
- a faulty torque build-up of the drive unit can be registered and prevented by appropriate control measures.
- Damp or suppress measures For a measurement of the sensor value preferably takes place with a sufficiently high frequency or in a determinable interval. Under a fixed support point can in the context of the invention z. B. a vehicle body can be understood.
- control unit may be provided, wherein the
- Control unit is in signal communication with the at least one sensor and determines the measured value from the sensor value.
- the control unit processes and evaluates the measurement signal or signals in the form of the sensor value or the
- Signal connection of the control unit with the at least one sensor can be formed via cable and / or wireless.
- the data interface for transmitting the sensor value to the control unit may, for example, be used as a Bluetooth
- the control unit may, for example, be an in-vehicle control unit which is at the same time suitable for processing a control of driving functions and / or an adjustment of other signals, the measured values of the machine flows and / or the rotor position angle.
- the control unit and / or the at least one sensor to transmit the sensor value and / or the measured value to a vehicle-external, in particular mobile device, so that the data can be read out and evaluated by an external or mobile device. This can, for example, at a Test stand or used in a workshop, so that in a simple way, the data of the drive unit with respect to the torque can be evaluated.
- the control unit and / or the at least one sensor to transmit the sensor value and / or the measured value to a vehicle-external, in particular mobile device, so that the data can be read out and evaluated by an external or mobile device. This can, for example, at a Test stand or used in a workshop, so that in a simple way, the data of the drive unit with respect to the torque can
- Control unit Data from models about the air and injection quantity or the current data of an electric drive unit determined. As a result, monitoring in the torque path can be provided, with the control unit determining the measured value for the torque of the drive unit on the basis of the sensor values, in particular in conjunction with characteristic values of the drive unit stored in the control unit.
- the measured value can advantageously be determined from the sensor value and at least one bearing characteristic value, wherein in particular the bearing characteristic value is an expansion, a bending and / or a torsional rigidity.
- the bearing characteristic value can be stored, for example, in a sensor electronics of the at least one sensor and / or in the control unit so that the bearing characteristic value in conjunction with the sensor value determines the measured value for the torque of the drive unit via an algorithm or a heuristic.
- Lagerkennwert for the at least one particular elastically formed bearing of the drive unit results, for example, from the geometry of the bearing and / or the material used in the bearing, so that this bearing characteristic is a substantially fixed or constant characteristic value, which is essentially unchangeable, so this as reliable
- Calculation parameter for the determination of the measured value from the sensor value can be used.
- Torsional rigidity of the bearing thus represents a calculation parameter for the algorithm and / or the heuristic, so that it can determine the torque of the drive unit in conjunction with the measured sensor value.
- the applied torque can be calculated back.
- the drive unit may preferably have at least two bearings for connection to at least one fixed support point.
- the at least two bearings are arranged at a distance from one another on the drive unit or connected to the drive unit, wherein at least one sensor is preferably arranged on each bearing, so that a multiplicity of sensor values can be measured at the bearings of the drive unit.
- at least one bearing undergoes a compressive force by the applied torque and another bearing is loaded by a tensile force due to the torque.
- the at least two bearing undergoes a compressive force by the applied torque and another bearing is loaded by a tensile force due to the torque.
- the tensile force due to the torque.
- Position change in particular a relative rotation of the drive unit to at least two bearings, in particular spaced from each other arranged bearings, are measured and in the calculation or determination of the
- Measured value can be used from the sensor values. This leads to a more reliable measurement of the torque, whereby variations of the measured values due to the large number of sensor values can be reduced, so that the torque can be determined more precisely.
- At least one sensor can be arranged on the drive unit and / or the bearing and at least one sensor can be arranged on the fixed support point.
- sensor values are measured which can be compared with one another, so that with an unchanged sensor value of the fixed support point and a sensor value on the drive unit which is changed in comparison with this and / or. or the bearing, the relative change in position and / or force change are measured and compared with each other.
- At least one sensor is a distance sensor, in particular a capacitive, optical sensor or acoustic sensor.
- An inventive distance sensor can be arranged on the drive unit, the bearing, or the fixed support point and a change in position of the drive unit as a result of an adjacent
- the distance sensor is arranged on the drive unit, preferably at the fixed support point gives a reference measuring point, so that a change in distance with the aid of an optical sensor can be measured in comparison to the reference measuring point in a change in position of the drive machine.
- Distance measurement can, for example, be performed on a selected bearing, wherein, for example, the one elastic bearing at a selected location of a.
- Half sleeve is insulated against the sleeve half.
- Bolt and conductive sleeve are connected in the manner of a plate capacitor. With the distance between the two parts, the capacitance of the so pronounced sensor changes. From the
- Capacity change can be concluded on the applied reaction torque and thus on the torque.
- the bolt and the sleeve it is alternatively possible to use surfaces which are insulated from one another and whose spacing changes as a result of deformation due to the application of torque.
- interlocking ribs are designed as a capacitor. The degree of overlap of the ribs which changes as a result of a torque application leads to a change in the capacitance from which the torque impressed by the machine can be deduced.
- An acoustic sensor may be, for example, an ultrasonic sensor which measures a change in position of the drive machine relative to the fixed support point, for example the body, by means of ultrasound.
- At least one sensor an inertial sensor, in particular an acceleration sensor, or a Hall sensor can be present, as a result of which a relative position angle of the drive unit can be determined.
- the drive unit is rotated by the load, due to the torque, due to the elastic bearing by the angle ⁇ . Accordingly, the measured value of the acceleration sensor also changes, wherein this measured value is compared with an equivalent measured value of a sensor that has not been changed in position. Due to the difference of the measured values, it is possible to deduce the angle between the two sensors and from this the impressed torque.
- two sensors Preferably, two
- Acceleration sensors present, with a positionally stable sensor and a sensor arranged on the drive unit and / or the elastic bearing available.
- the position-fixed sensor is preferably arranged at the fixed support point and forms a reference system for the measurement.
- the measured value of the position-changed sensor on the drive unit changes as a result of a rotation of the drive unit. Based on the changed measured value and the measured value of the
- a Hall sensor in particular a 3D magnetic field sensor, uses the Hall effect to measure magnetic fields.
- a combination of lateral with vertical Hall sensors to a 3D magnetic field sensor allows a position detection and thus a change in position.
- Such magnetic field sensors measure contactless and wear-free the position of machine parts.
- the senor is a force transducer, whereby a force change at the bearing is measurable.
- a force transducer or force sensor may, for example, be a piezoelectric element which is used to measure the pressure
- Torque can be measured. From the sensor value determined in this way, the applied torque can be determined in conjunction with a bearing characteristic value.
- At least one sensor can be arranged on a drive machine of the drive unit and / or on a differential gear.
- a prime mover means within the meaning of the invention a drive unit, in particular an electric drive unit or an internal combustion engine, which generates a torque for driving, for example, a vehicle.
- at least one sensor is arranged on a differential gear of a drive unit.
- a differential gear is to be used in particular when the engine and the drive axle by such
- Differential gear are connected together. This may, for example, be vehicles which have a front engine and are driven via the rear axle and / or over all four wheels.
- the voltage applied to the differential gear torque can be measured, so that the torque can be measured directly on the drive axle, what to results in more precise measurement results compared to a torque measurement on the drive machine in rear-wheel drive vehicles.
- the measuring system for torque measurement is particularly suitable for use in a vehicle drive unit, wherein the measuring system has at least one sensor, by means of which a change in force and / or position, in particular a relative rotation of the drive unit, can be measured.
- the measuring system has at least one control unit, wherein the control unit is in signal connection with the at least one sensor, by means of which a
- Torque measurement according to the method of the invention is feasible.
- an inventive measuring system brings the same advantages as have been described in detail with respect to the inventive method.
- Figure 1 shows a first embodiment of the invention
- FIG. 2 shows another embodiment of the invention
- FIG. 1 shows a possible embodiment of the invention
- measuring system 100 shown, wherein the measuring system 100 has a first sensor 22 which is connected to a bearing 23 of the drive unit 10 with a fixed support point 21 immovably.
- the bearing 23 is in the
- Drive unit 10 generated torque a relative change in position, in particular a relative rotation about the bearing 23 can be achieved.
- the drive unit 10 in the figure 1 a second elastic
- a second sensor 25 is arranged, which as a
- Distance sensor 25 is formed and a relative change in position of the
- the distance sensor 25 measures the relative
- Position change As between the reference point RP and the measuring point MP.
- the reference point RP forms the comparison value, which reproduces the position of the drive unit 10 without applied torque. If the drive unit 10 now generates a torque, which is represented by the arrow in the drive unit 10, the torque generates a relative change in position of the drive unit 10, around the two bearings 20 and 23. On the one hand, a tensile force on the sensor 22 can be measured. which is generated by a movement of the drive unit 10 as a result of the torque.
- the drive unit 10 moves by the relative change in position As, so that the two sensor values from the sensor 22 and the sensor 25 can be used to determine the generated torque.
- the sensors 22 and 25 are in Figure 1 in signal communication with the
- the control unit 30 carries out the method according to the invention for torque measurement of the drive unit 10 and thus determines the generated torque based on the sensor values of the sensor 25 and 22 in conjunction with the known bearing characteristics of the bearing 20 and 23.
- the support points 21 and 24 are exemplary for the body of a vehicle, so that it is a fixed reference points for the measurement of the relative change in position and / or force change.
- the drive unit 10 is shown in FIG. 1 by way of example for a vehicle drive unit, in particular one
- FIG. 2 shows a drive unit 10, comprising an engine 11 and a differential 12 for driving a vehicle.
- Drive machine 11 is connected via two bearings 20 and the bearing 23 to the body 21, 24 as fixed support points.
- a distance sensor 22 which measures the distance As of the drive machine 11 to the fixed support point 24, is arranged on the drive machine 11. The distance As changes with an applied torque, so that this change can be measured by the sensor 22.
- each one of the drive machine 11 and the fixed support point 24 is connected via two bearings 20 and the bearing 23 to the body 21, 24 as fixed support points.
- a distance sensor 22 which measures the distance As of the drive machine 11 to the fixed support point 24, is arranged on the drive machine 11. The distance As changes with an applied torque, so that this change can be measured by the sensor 22.
- Acceleration sensor 25 is arranged, which measures the acceleration of the drive machine 11 and the fixed Abstweilins and detected in relation to each other a change in position.
- the arrow in the sensors 25 indicates the acceleration vector.
- two acceleration sensors 25 are provided, with a positionally stable sensor 25 and a sensor 25 arranged on the drive machine 25 being present.
- the position-fixed sensor 25 is arranged at the fixed support point 24 and forms a reference system for the measurement.
- the measured value of the position-changed sensor 25 on the drive machine 11 changes as a result of a rotation of the drive unit 10.
- the torque can be determined on the basis of the changed measured value and the measured value of the reference system. From the deviating values for a x and a z can be assumed by means of
- the drive unit 10 has in Fig. 2, a differential 12, whereby a torque can be transmitted from the engine 11 via the differential 12 to a drive axle 13. If a torque is applied to the differential 12 and accordingly to the drive axle 13, then the distance As changes from the drive axle 13 to the fixed one
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015225696.0A DE102015225696A1 (de) | 2015-12-17 | 2015-12-17 | Verfahren zur Drehmomentmessung einer Antriebseinheit |
PCT/EP2016/070387 WO2017102112A1 (de) | 2015-12-17 | 2016-08-30 | Verfahren zur drehmomentmessung einer antriebseinheit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3391000A1 true EP3391000A1 (de) | 2018-10-24 |
Family
ID=56877014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16760688.8A Withdrawn EP3391000A1 (de) | 2015-12-17 | 2016-08-30 | Verfahren zur drehmomentmessung einer antriebseinheit |
Country Status (7)
Country | Link |
---|---|
US (1) | US10627300B2 (de) |
EP (1) | EP3391000A1 (de) |
JP (1) | JP2018537685A (de) |
KR (1) | KR102499186B1 (de) |
CN (1) | CN108369145B (de) |
DE (1) | DE102015225696A1 (de) |
WO (1) | WO2017102112A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020239192A1 (de) * | 2019-05-24 | 2020-12-03 | Amsd Advanced Mechatronic System Development Kg | Verfahren zur ermittlung eines werts eines abgegebenen und/oder übertragenen drehmoments |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1386580A (en) | 1972-07-27 | 1975-03-12 | Tokico Ltd | Turbine-type flowmeter |
US3978718A (en) * | 1973-07-30 | 1976-09-07 | Schorsch Ronald W | Electronic dynamometer |
JPS52124532A (en) * | 1976-04-12 | 1977-10-19 | Toyota Motor Corp | Ignition timing and fuel feed quantit control for engine for cars |
US4202205A (en) * | 1978-05-26 | 1980-05-13 | MRC Corporation | Integral torquer for mass measurement system |
JPS5872018A (ja) | 1981-10-27 | 1983-04-28 | Nippon Soken Inc | 内燃機関用トルク検出器 |
JPS59111028A (ja) | 1982-12-17 | 1984-06-27 | Fuji Electric Co Ltd | 静電容量式トルク測定器 |
DE58900556D1 (de) * | 1988-08-11 | 1992-01-23 | Siemens Ag | Messaufnehmer fuer laengen- oder abstandsaenderungen, insbesondere fuer beruehrungslose messung von drehmomenten an rotierenden wellen. |
US5596153A (en) * | 1995-05-02 | 1997-01-21 | New Holland North America, Inc. | Measurement of rotational velocity and torque |
JP3743736B2 (ja) * | 1997-12-18 | 2006-02-08 | Jfeアドバンテック株式会社 | トルク計 |
DE10006534B4 (de) * | 2000-02-15 | 2013-12-19 | Continental Automotive Gmbh | Verfahren und Sensorelement zur Verformungsmessung |
FR2890737B1 (fr) * | 2005-09-09 | 2009-04-10 | Peugeot Citroen Automobiles Sa | Dispositif d'estimation du deplacement d'un groupe moteur par rapport a la struture d'un vehicule automobile et systeme d'evaluation du couple transmis par le groupe moteur |
WO2007034942A1 (ja) * | 2005-09-26 | 2007-03-29 | Kokusai Keisokuki Kabushiki Kaisha | 走行試験装置 |
CN101183034A (zh) * | 2007-12-04 | 2008-05-21 | 奇瑞汽车有限公司 | 一种电机扭矩测量方法 |
CN102628718B (zh) * | 2011-02-01 | 2016-03-16 | 阿尔斯通技术有限公司 | 用于测量轴变形的设备和方法 |
CN103620372B (zh) * | 2011-04-12 | 2016-04-13 | 国际计测器株式会社 | 旋转扭曲试验机 |
DE102011007465A1 (de) * | 2011-04-15 | 2012-10-18 | Schaeffler Technologies AG & Co. KG | Kombination aus einer ein Drehmoment übertragenden Antriebswelle und einer die Antriebswelle lagernden Lageranordnung |
DE102012222854A1 (de) * | 2012-12-12 | 2014-06-12 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Gesamtmassebestimmung eines elektrisch antreibbaren Fahrzeugs |
JP2016130730A (ja) | 2015-01-07 | 2016-07-21 | 株式会社ロボテック | モータシステム |
-
2015
- 2015-12-17 DE DE102015225696.0A patent/DE102015225696A1/de active Pending
-
2016
- 2016-08-30 KR KR1020187019782A patent/KR102499186B1/ko active IP Right Grant
- 2016-08-30 CN CN201680074021.5A patent/CN108369145B/zh active Active
- 2016-08-30 WO PCT/EP2016/070387 patent/WO2017102112A1/de active Application Filing
- 2016-08-30 JP JP2018531342A patent/JP2018537685A/ja active Pending
- 2016-08-30 EP EP16760688.8A patent/EP3391000A1/de not_active Withdrawn
- 2016-08-30 US US16/063,548 patent/US10627300B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2018537685A (ja) | 2018-12-20 |
WO2017102112A1 (de) | 2017-06-22 |
US20190003909A1 (en) | 2019-01-03 |
CN108369145A (zh) | 2018-08-03 |
US10627300B2 (en) | 2020-04-21 |
KR102499186B1 (ko) | 2023-02-13 |
DE102015225696A1 (de) | 2017-06-22 |
CN108369145B (zh) | 2021-02-05 |
KR20180094033A (ko) | 2018-08-22 |
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