EP2212670A1 - Torque measuring device, torque measuring flange and torque measuring method - Google Patents
Torque measuring device, torque measuring flange and torque measuring methodInfo
- Publication number
- EP2212670A1 EP2212670A1 EP08849750A EP08849750A EP2212670A1 EP 2212670 A1 EP2212670 A1 EP 2212670A1 EP 08849750 A EP08849750 A EP 08849750A EP 08849750 A EP08849750 A EP 08849750A EP 2212670 A1 EP2212670 A1 EP 2212670A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque
- torque measuring
- zero
- drehmomentmessflansch
- flange
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011156 evaluation Methods 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims description 31
- 230000001419 dependent effect Effects 0.000 claims description 14
- 230000015654 memory Effects 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 23
- 238000012937 correction Methods 0.000 description 18
- 238000009529 body temperature measurement Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010972 statistical evaluation Methods 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241001214257 Mene Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
- G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque
-
- 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
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
Definitions
- Torque measuring device torque measuring flange and torque measuring method
- the invention relates to a torque measuring device, a torque measuring flange and a torque measuring method.
- Such torque measuring devices are used, for example, in test stands, as disclosed inter alia in DE 10 2006 044 829 A1.
- torque measuring flanges or measuring shafts as described, for example, in DE 42 03 551 A1 or DE 10 2007 005 894 A1 but also in DE 20 2006 007 689 U1, in DE 199 17 626 A1, DE 197 19 921 Al and DE 103 06 306 Al and in the Internet articles "Operating Instructions Torque Measuring Fli / F2i" of GIF Weg für Industrie Wunsch mbH from Aisdorf in Germany (2007 / Rev.1.25) and "User's Manual TF Series Torque Flange Sensors" of Magtrol Inc.
- torque-measuring flange and measuring shaft being used interchangeably in the present context.
- a torque is measured, which in the present context primarily torques of rotating assemblies are measured.
- such assemblies can be selectively subjected to a load during a rotation in order to investigate the behavior of the corresponding assembly under load, in particular with regard to the reaction thereof by means of a changed torque. In this way, in particular wear, durability, extreme load behavior, natural vibration, rattle noise u. ⁇ . Be examined.
- DE 20 2006 discloses a torque measuring shaft which, inter alia, has a digital interface and a temperature sensor for temperature-dependent zero point compensation, ie the compensation of a temperature dependence of the measured value output by the torque measuring shaft when no torque is applied.
- the present invention firstly proposes a torque measuring device with a torque measuring flange and an evaluation, which is characterized in that the evaluation has means for storing a variable proportional to a freewheeling torque and means for compensating a measured value with the stored variable.
- the invention is based on the basic knowledge that a Drehmomentmessflansch in the free-running state, ie in a completely independent of any load applied by any DUT or even an externally applied
- the invention according to the proposed torque measuring device thus makes it possible to determine such a freewheeling moment in which, for example, in a completely unloaded state, a measurement is performed, and the respectively determined or measured
- the present invention proposes, secondly, a method for measuring torque, which is characterized in that initially a free-wheeling torque is determined and the determined torque measured value is subsequently compensated with the free-wheeling torque.
- a torque measuring flange is usually characterized by a measuring device for measuring a variable proportional to a torque acting on the Drehmomentmessflansch size
- the measuring device may comprise strain gauges or other voltmeter, with which a distortion of the torque measuring, which is regularly proportional to a torque , can be recorded.
- a measuring device for measuring a size proportional to a torque acting on the Drehmomentmessflansch all devices, including, for example Displacement measurements or the like, can be used, with which such a size can be measured according sufficiently reliable.
- Torque measuring flange with a measuring device for measuring one to one on the
- Torque measuring flange acting torque proportional size which is characterized by a provided on the Drehmomentmessflansch evaluation unit having means for storing a proportional to a freewheeling torque size.
- the corresponding compensation means for compensating a measured value with the stored, proportional to the freewheeling torque size are provided on the Drehmomentmessflansch.
- Such a configuration makes it possible to carry out a corresponding compensation already directly on the torque measuring flange, in particular even if it rotates. In this way, only the measurement signal present after the compensation needs to be transmitted. Otherwise, it may be necessary to transfer the stored in the memory means on the Drehmomentmessflansch, proportional to the freewheeling torque size or stored in the memory means on the Drehmomentmessflansch, proportional to the freewheeling torque magnitudes in a separate step to an evaluation.
- the freewheeling torque is optionally dependent on the speed. This is presumed to be due to aerodynamic drag or flying forces, or possibly to almost imperceptible assembly inaccuracies or imbalances.
- the storage means comprise means for storing a proportional to a speed-dependent freewheeling torque size associated with a speed. In this way, according to several freewheeling torques can be stored speed-dependent, which then make it possible by suitable extra or interpolation or other, known from the prior art measures, a corresponding compensation. In this case it is also possible, instead of various measured values, to store a correspondingly already extrapolated or interpolated functional dependency.
- the known speed measuring devices have the corresponding sensor exclusively on a stator, such as a housing or a linkage, otherwise the speed or a variable proportional to the speed of a rotor to an evaluation, which regularly just not co-rotate, must be transmitted separately ,
- a stator such as a housing or a linkage
- the present invention thus far from this common practice, since the sensor on the Drehmomentmessflansch, which can just rotate accordingly, should be provided, wherein optionally a stationary, so not co-rotating, signal emits a signal to be detected at each revolution of the sensor.
- a signal generator may be a small permanent magnet, the magnetic field of which can be detected by a rotary sensor rotating with the Hall sensor or reed switch.
- any suitable sensor system with which a rotational speed can be determined sufficiently reliably can be used advantageously.
- the correspondingly determined and compensated measurement result can be transmitted by the torque measuring flange.
- the emission can take place here in any known form, which makes it possible to transmit a measured value or another variable from a first to a second assembly.
- the emission preferably takes place without contact, so that an influence on the measuring arrangement itself can be minimized.
- the fixed part of the torque measuring device may then correspondingly have a receiver which receives the transmitted signal.
- a transmission by light has proven to be particularly advantageous, in particular if the quantity proportional to the rotational speed is transmitted in a frequency-modulated manner. A transmission is then extremely low energy, so that sufficient for the torque measuring a very small source of energy.
- Object of the present invention also solved by a torque measuring device with a Drehmomentmessflansch and an evaluation in which the evaluation by a memory for storing a zero point of the torque measuring flange over time.
- a torque measuring device with a Drehmomentmessflansch and an evaluation in which the evaluation by a memory for storing a zero point of the torque measuring flange over time.
- this can be related to voltages that are introduced by the currently driven measurement program in the measuring body. It is also conceivable that this is related to insufficient stability of the analog signal processing modules and the analog transducers. Just the lack of knowledge of the corresponding relationships and the very long periods in which the corresponding drift is effective, have hitherto prevented a dispute hereby. Only a storage of the zero point as a function of time can allow consideration of this phenomenon.
- a zero-point drift can be determined and a determined torque measured value can be compensated with the zero-point drift.
- the torque measuring device has means for displaying the zero-point drift, so that a user has an overview of the corrections made, in particular in order to be able to check the quality of the measurement.
- a user has an overview of the corrections made, in particular in order to be able to check the quality of the measurement.
- the corrections can be made within the device without a user is charged with a corresponding display.
- torque 0 Nm, waver.
- Mene correction to distinguish even from already known calibrations, which just start directly on the statistical fluctuations and only briefly act accordingly calibrating.
- the zero values are stored in the memory at a constant temperature.
- constant temperature denotes a state in which the temperature changes less than a predetermined temperature difference within a predetermined time interval.
- zero values are stored for zero-point drift determination if the measured torque is below a threshold value over a plurality of measurements.
- the zero points can be recorded independently of the influence of a user, so that, depending on the specific implementation, it is possible to automatically record the zero points and - if necessary - to make a corresponding compensation automatically. This can relieve a user and minimize the risk of operating errors. It will be appreciated that other approaches to automation may be used, the approach described above being a relatively simple and reliable approach.
- a torque measuring flange made of titanium, which are intended to be loaded with a torque, preferably with a titanium wheel between 1 and 10.
- a torque measuring flange with a load change hysteresis below 0.03% of the rated torque can be provided, which surprisingly also has a very low zero point drift.
- the necessary corrections can be minimized in their absolute value, although a zero-point drift can not be avoided without such corrections.
- a correction of the zero-point drift can be dispensed with if it is structurally correct Measures the size of the drift sufficiently low and can be detected by simple calibration measures before or after each measurement.
- a corresponding memory for storing the zero points of the Drehmomentmessflansches as a function of time can be provided on the one hand in a stationary evaluation of the torque measuring device.
- the memory may also be arranged on or on a corresponding Drehmomentmessflansch, so that the corresponding values and corrections are made before the transmission of a measured value to the stationary system of the corresponding torque measuring device, as this has already been explained for the freewheel correction.
- FIG. 1 shows a first torque measuring flange according to the invention with a corresponding stator in a schematic representation
- FIG. 2 shows a second torque measuring flange according to the invention with a corresponding stator in a schematic representation
- Figure 3 shows a basic structure of a test stand with a
- FIG. 4 shows the method sequence for a determination and correction of the zero-point drift
- FIG. 5 shows the detail of the standstill detection in the method sequence according to FIG. 4;
- FIG. 6 shows the detail of checking the temperature retention in the method sequence according to FIG. 4;
- FIG. 7 shows the detail of the statistical evaluation in the method sequence according to FIG. 4.
- FIG. 8 shows exemplary measurement results without correction of the zero-point drift (FIG. 8a) and with correction of the zero-point drift (FIG. 8b).
- the torque measuring flanges 100 and 200 shown in FIGS. 1 and 2 can be used as torque measuring flange 1 in the drive train of a test stand 2, as shown by way of example in FIG Figure 3 is shown, be provided.
- the drive train has a drive machine 3, such as an electric motor, by means of which a test object 4 can be driven.
- the concrete structure of the test bed 2 can be adapted to the requirements relatively individually.
- the specimen 4 is on the one hand via an intermediate shaft 5 with the Drehmomentmessflansch 1, which on its side facing away from the test piece 4 rotatably connected to the drive machine 3 and on the other hand connected via an intermediate shaft 6 with a loading device 7, which in particular as a brake but for example as a generator, so as an electric brake can be formed.
- a loading device 7 which in particular as a brake but for example as a generator, so as an electric brake can be formed. It is understood that it may be possible to dispense with the intermediate shafts 5, 6 and also the loading device 7. It is also possible to provide further modules.
- the evaluation comprises corresponding transducers or sensors and on the other hand corresponding storage or arithmetic units, which can be provided in particular by a data processing system.
- individual measured values can also be subjected to specific calculations, adjustments or compensations directly in situ even in small evaluation units.
- the prime mover 3, the torque measuring flange 1, the test specimen 4 and the loading device 7 and the intermediate shafts 5 and 6, the sensor system described above and the evaluation in the test stand 2 form a torque measuring device, with which the behavior of the specimen 4 below different, acting on him loads in particular with regard to a changing torque and also in dependence on a variable speed can be determined.
- the torque measuring flanges 100 and 200 shown in FIGS. 1 and 2 each have a co-rotating evaluation unit 110 or 210, which is essentially controlled by a microcontroller 111 or 211 which is controlled by a D-AWand 112 or 212 each directly a measurement signal, which is measured by arranged in a bridge circuit strain gauges 120 and 220 and amplified by amplifiers 121 and 221, can modify.
- the correspondingly modified signal is frequency modulated in a modulator 113 or 213 and emitted via light emitting diodes 114 and 214, respectively.
- a plurality of light-emitting diodes 114, 214 are respectively provided over the circumference of the torque measuring flange 100, 200, so that a correspondingly frequency-modulated signal 115 or 215 is radiated sufficiently uniformly in all directions radially.
- the torque measuring flanges 100, 200 shown in FIGS. 1 and 2 have coils which respectively rotate as rotor coils 130 and 230 with the respective torque measuring flange 100, 200 and in which via coils which act as stator coils 131 and 231, respectively are arranged in respective stators 132 and 232, a
- the stators 132, 232 each carry a photocell 116 and 216, respectively, which receive the frequency-modulated signal 115, 215 and can supply it to the evaluation device 9 (see FIG. 3).
- the photocells 116, 216 may receive the frequency modulated signal 115, 215 at each rotational angle of the torque sensing flange 100, 200.
- a corresponding measurement result can also be transmitted in any other way from the torque measuring flange 100, 200 as long as a corresponding receiver is provided on the stator side.
- a temperature sensor 140 or 240 is respectively provided on the torque measuring flanges 100, 200.
- the data of the temperature sensor 140, 240 are each provided to the microcontroller 111, 211, so that the latter, based on data stored in an EEPROM 117 or 217, from the temperature measurement of the respective temperature sensor 140, 240, a heat-dependent correction of the amplifier 121, 221 output signal via the DAW andler 112, 212 can make. Due to the strain gauges 120, 220 can thus determine a torque, indicated by the opposing direction of rotation arrows 102, 103 and 202, 203 and passed on compensated in terms of temperature. This is especially true when the entire Drehmomentmessflansch or the arrangement shown in Figure 3 rotates.
- the torque measuring flange shown in FIG. 1 has a Hall sensor 150, which is connected to the microcontroller 111. Moreover, in the arrangement of Figure 1, a permanent magnet 151 is provided on the stator 132, so that the Hall sensor 150 with each revolution corresponding signal outputs, from which the speed can be determined easily. It is understood that to increase the accuracy of measurement, a plurality of permanent magnets 151 provided circumferentially distributed on the stator 132 and / or that instead of the Hall sensor, for example, a reed switch can be provided accordingly.
- the torque measuring flange 200 shown in FIG. 2 has a voltmeter 250 for determining a variable proportional to the rotational speed, which determines the induced voltage in the rotor coil 230, which depends inter alia on the rotational speed, and provides the microcontroller 211 with a corresponding measured value provides,
- the respective microcontroller 111, 211 On the basis of appropriate data, which are stored in the respective EEPROM 117, 217, and which represent a proportional to a freewheeling torque size, the respective microcontroller 111, 211 output a proportional to a speed-dependent freewheeling torque and thus the measured value, which over the respective modulator 113, 213 is output, compensate accordingly.
- Torque measuring flange 1, 100, 200 for example, in a separate laboratory, readily possible.
- the respective calibration data can readily be stored in the storage means at the respective torque measuring flange 1, 100, 200. It is understood that such calibration operations can be made readily in other embodiments, as long as a corresponding assignment of the respective data or sizes is ensured.
- zero-point drift For determining and correcting the zero-point drift, which can be carried out without difficulty in the evaluation units 110 and 210, possibly by using existing there memories, or in the evaluation device 9 using existing there memories, is after the in FIG 4 procedures described proceeded.
- zero points that is to say torque measured values with no torque present, are measured and stored as a function of time in a memory (not numbered), which can ultimately be provided at any point. Adjusted for statistical fluctuations results in a zero point drift 10, which should be corrected.
- a standstill detection 20 (see FIG. 5) is carried out, in which it is checked in a loop 21 whether a torque M1 (see reference numeral 22) is below a torque threshold value x (torque threshold value inquiry 25) over y measured values (y is the number the knife values) is present by incrementing (reference numeral 24) a counter i that was zeroed at the beginning of the measurement (reference numeral 23) and comparing it with the desired number of readings y (reference numeral 26). If this is the case, it is assumed that the test stand 2 is at a standstill.
- the loop 21 is restarted at the torque threshold request 25 and the counter is reset to zero (reference numeral 23). Likewise, the loop 21 is restarted when a temperature check 27 shows that the temperature is not sufficiently stable.
- the temperature test 27 is performed by retrieving a temperature bit T4 set to 1 (reference numeral 30) when, after a first temperature measurement 32 (T2) and a second temperature measurement 33 (T1) following some time later, one during a Temperature difference determination 34 detected temperature difference T3 is below a temperature threshold t (reference numeral 35). Otherwise, the temperature bit 30 is given the value 0 (reference numeral 31).
- the first temperature T2 is measured at the beginning of the standstill detection loop 21, while the second temperature T1 is measured each time the loop 21 passes, that is, with each increment 24 of the counter. It is understood that depending on the specific embodiment, the temperatures can be measured at other times to ensure a temperature test 27.
- the corresponding correction value is then applied to the respective measured values (measured value correction 60), whereby a long-term zero-point drift 70 can be prevented and only statistical fluctuations of the zero points resulting from the respective, preceding measurement situations or other currently occurring conditions remain.
- FIGS. 8a and 8b illustrate actual measurements in FIGS. 8a and 8b, wherein FIG. 8a illustrates a zero-point drift of a test bench that was not yet controllable at the time, while FIG. 8b illustrates how, by correcting the zero drift, the mean of the zero points remains constant over the same measurement period.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007054408 | 2007-11-13 | ||
DE102008028826A DE102008028826A1 (en) | 2008-06-19 | 2008-06-19 | Torque measuring unit has torque measuring flange and evaluation device, where evaluation device has unit for storing variable which is proportional to freewheel torque |
PCT/DE2008/001856 WO2009062481A1 (en) | 2007-11-13 | 2008-11-13 | Torque measuring device, torque measuring flange and torque measuring method |
Publications (1)
Publication Number | Publication Date |
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EP2212670A1 true EP2212670A1 (en) | 2010-08-04 |
Family
ID=40474985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08849750A Ceased EP2212670A1 (en) | 2007-11-13 | 2008-11-13 | Torque measuring device, torque measuring flange and torque measuring method |
Country Status (8)
Country | Link |
---|---|
US (1) | US20100307218A1 (en) |
EP (1) | EP2212670A1 (en) |
JP (1) | JP5846405B2 (en) |
KR (1) | KR20100102610A (en) |
CN (2) | CN102865959A (en) |
DE (1) | DE112008003002A5 (en) |
RU (1) | RU2010117731A (en) |
WO (1) | WO2009062481A1 (en) |
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DE102010034877A1 (en) | 2009-08-23 | 2011-02-24 | GIF Gesellschaft für Industrieforschung mbH | Torque measuring device and arrangement of a torque measuring device and a drive shaft |
EP2437041A1 (en) * | 2010-09-29 | 2012-04-04 | Peelen, Harry | Stepper torsion bench, method for characterizing polymeric materials and a method for performing mechanical calculations in the field of industrial designing |
DE102013005967A1 (en) | 2012-05-18 | 2013-11-21 | GIF Gesellschaft für Industrieforschung mbH | Rotational torque measuring unit of rotational torque measuring device mounted on rotor, has accelerometers and torsion element that are inseparably connected with carrier |
US9857254B2 (en) | 2012-05-18 | 2018-01-02 | Atesteo Gmbh | Torque-measuring device or jig |
DE102012022982A1 (en) | 2012-11-26 | 2014-05-28 | GIF Gesellschaft für Industrieforschung mbH | Torque measuring device and method for measuring a torque |
CN103085864B (en) * | 2013-01-25 | 2015-07-29 | 株洲易力达机电有限公司 | A kind of electric boosting steering system torque sensor drift compensating method |
GB2532927A (en) | 2014-11-27 | 2016-06-08 | Skf Ab | Sealing assembly and method for monitoring dynamic properties of a sealing assembly |
GB2532762A (en) * | 2014-11-27 | 2016-06-01 | Skf Ab | Load measurement device and method for determining load |
GB2532928A (en) | 2014-11-27 | 2016-06-08 | Skf Ab | Sealing assembly and method for monitoring a sealing assembly |
FR3035502B1 (en) * | 2015-04-27 | 2017-04-14 | Turbomeca | COUPLER WITH DEFORMATION MEASUREMENT |
US20170167287A1 (en) * | 2015-12-09 | 2017-06-15 | General Electric Company | Calibrated Turbine Engine Shaft Torque Sensing |
JP6433419B2 (en) * | 2015-12-25 | 2018-12-05 | 本田技研工業株式会社 | Torque sensor terminal block structure |
JP6191729B2 (en) * | 2016-05-24 | 2017-09-06 | シンフォニアテクノロジー株式会社 | Specimen test equipment |
US10975717B2 (en) * | 2016-12-19 | 2021-04-13 | General Electric Company | Torque monitoring device for a gas turbine engine |
DE102018000030B4 (en) * | 2018-01-03 | 2023-03-30 | Hottinger Brüel & Kjaer GmbH | System for wirelessly supplying electric power to a rotating device |
JP7455168B2 (en) * | 2021-10-28 | 2024-03-25 | キストラー ホールディング アクチエンゲゼルシャフト | Torque and rotation angle detection system |
DE102022001458A1 (en) * | 2022-04-26 | 2023-10-26 | Chr. Mayr Gmbh + Co. Kg | Torque measuring coupling |
CN114986380A (en) * | 2022-05-30 | 2022-09-02 | 上海华力微电子有限公司 | Method for improving grinding efficiency and grinding system |
CN114992320A (en) * | 2022-06-20 | 2022-09-02 | 中国第一汽车股份有限公司 | Torque distribution calibration system and method |
CN117571197B (en) * | 2024-01-17 | 2024-03-26 | 绵阳师范学院 | Coupler torque calibration correction method and system |
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- 2008-11-13 WO PCT/DE2008/001856 patent/WO2009062481A1/en active Application Filing
- 2008-11-13 DE DE112008003002T patent/DE112008003002A5/en not_active Withdrawn
- 2008-11-13 KR KR1020107013026A patent/KR20100102610A/en not_active Application Discontinuation
- 2008-11-13 US US12/734,573 patent/US20100307218A1/en not_active Abandoned
- 2008-11-13 CN CN201210333513.5A patent/CN102865959A/en active Pending
- 2008-11-13 RU RU2010117731/28A patent/RU2010117731A/en unknown
- 2008-11-13 CN CN200880115980.2A patent/CN101855531B/en not_active Expired - Fee Related
- 2008-11-13 JP JP2010532432A patent/JP5846405B2/en not_active Expired - Fee Related
- 2008-11-13 EP EP08849750A patent/EP2212670A1/en not_active Ceased
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None * |
See also references of WO2009062481A1 * |
Also Published As
Publication number | Publication date |
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US20100307218A1 (en) | 2010-12-09 |
CN101855531A (en) | 2010-10-06 |
CN102865959A (en) | 2013-01-09 |
WO2009062481A1 (en) | 2009-05-22 |
JP2011503556A (en) | 2011-01-27 |
RU2010117731A (en) | 2011-12-20 |
JP5846405B2 (en) | 2016-01-20 |
DE112008003002A5 (en) | 2010-08-05 |
KR20100102610A (en) | 2010-09-24 |
CN101855531B (en) | 2013-01-02 |
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