EP2656114A2 - Chercheur de lignes - Google Patents

Chercheur de lignes

Info

Publication number
EP2656114A2
EP2656114A2 EP11793352.3A EP11793352A EP2656114A2 EP 2656114 A2 EP2656114 A2 EP 2656114A2 EP 11793352 A EP11793352 A EP 11793352A EP 2656114 A2 EP2656114 A2 EP 2656114A2
Authority
EP
European Patent Office
Prior art keywords
voltage
complex
measuring device
conductor
alternating
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Withdrawn
Application number
EP11793352.3A
Other languages
German (de)
English (en)
Inventor
Markus Hahl
Andrej Albrecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2656114A2 publication Critical patent/EP2656114A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • G01V3/06—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using ac
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/081—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the magnetic field is produced by the objects or geological structures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/0005—Geometrical arrangement of magnetic sensor elements; Apparatus combining different magnetic sensor types

Definitions

  • the invention relates to a measuring device according to the preamble of claim 1 and a measuring method according to claim 10 for detecting an alternating voltage-carrying conductor.
  • Alternate field determines which exists in the supply line.
  • the invention is based on the object, an improved measuring device and an improved
  • the invention solves the objects by means of a measuring device with the features of claim 1 and by means of a measuring method with the features of
  • One of the complex Wderstand is changeable by means of a control voltage which is provided by a probe in response to a conductor-induced electromagnetic alternating field.
  • the probe may comprise one of an electrode for receiving an electrical portion of the electromagnetic field of the conductor or a magnetic field sensor for receiving a magnetic portion of the electromagnetic field.
  • the electrical component is easier to influence, so that, for example, a wet wall in which the conductor is laid can make it difficult to locate the conductor.
  • the magnetic component is generally less easily influenced, but it can be very low and therefore poorly detectable, if a current flowing through the conductor is small.
  • the other complex resistor is also changeable, and means are provided for altering the other complex resistance in opposition to changing the one complex resistor.
  • This device may, for example, comprise an inverting amplifier which provides a control voltage provided by the probe in an inverted form for controlling the other complex resistance. As a result, a dynamic of the measuring device can be increased.
  • control voltage for the other complex resistor may be provided by a further probe in the region of the ac-conducting conductor.
  • the alternating-voltage-carrying conductor can be part of an alternating voltage supply network and one or more frequency filters can be provided in order to produce a frequency spectrum of the control voltage at a predetermined frequency.
  • ten frequency range which includes an operating frequency of the AC power supply network.
  • At least one of the controllable complex heat resistors comprises one of a capacitance diode, a bipolar transistor, a field effect transistor and a MOSFET.
  • a line connectable load element for generating a predetermined current through the line.
  • a minimum current in the line can be ensured, so that the determination by means of a magnetic field sensor can be facilitated.
  • the load element may be configured to vary the predetermined current in a predetermined manner, for example at a predetermined frequency or in some other known pattern, and the measuring device may be configured to provide only a portion of the control voltages for the complex heat resistances to use a voltage provided by the respective probe, which varies in the predetermined manner.
  • the electromagnetic field of the line can be distinguished from electromagnetic fields of other lines, so that the localization of the line can be further improved.
  • the alternating voltage-carrying conductor can be determined by means of a method which, in particular in the form of a computer program product, can run on a processing device or be stored on a computer-readable data carrier.
  • Figure 1 is a block diagram of a measuring device
  • FIG. 2 shows a variation of a part of the measuring device of FIG. 1;
  • FIG. 3 shows an arrangement of electrodes on the measuring device of the figures
  • FIG. 4 shows an arrangement of electrodes on the measuring device of one of FIGS. 1 to 3;
  • FIG. 5 shows an admission module
  • Figure 6 illustrates a flowchart of a method.
  • FIG. 1 shows a block diagram of a measuring device 100.
  • the measuring device 100 is part of a line locating device 105 for detecting an AC-carrying conductor, for example a 110V / 60Hz or 230V / 50Hz line or else a low-voltage line of, for example, 12V / 50-60Hz.
  • an AC-carrying conductor for example a 110V / 60Hz or 230V / 50Hz line or else a low-voltage line of, for example, 12V / 50-60Hz.
  • a clock generator 110 has two outputs at which it provides phase-shifted, preferably 180 ° out of phase, periodic alternating signals.
  • the alternating signals may in particular comprise square, triangular or sinusoidal signals.
  • the outputs of the clock generator 110 are connected to a first controllable amplifier 15 and a second controllable amplifier 120, respectively.
  • Each of the controllable amplifier 1 15, 120 has a control input, via which it receives a signal which controls a gain of the controllable amplifier 1 15, 120.
  • An output of the first controllable amplifier 115 is connected to a first complex resistor 125 and an output of the second controllable amplifier 120 is connected to a second complex resistor 130.
  • Each complex Wderstand 125, 130 may include, for example, an RC or LC member in a known manner.
  • Remaining ends of the complex walls 125 and 130 are interconnected via two resistors 135a, 135b.
  • the resistors 135a and 135b are omitted and the remaining ends of the complex walls 125, 130 are directly connected together.
  • Wderiron 135a, 135b is applied to a differential voltage.
  • a connection is made to an input amplifier 140.
  • the input amplifier 140 is represented by a constant gain factor; however, in other embodiments, an amplification factor of the input amplifier 140 may also be controllable.
  • a spatial resolution and / or sensitivity of the measuring device 100 can be influenced and controlled, for example, as a function of a measured variable of the measuring device 100.
  • the output of the input amplifier 140 is connected to a synchronous demodulator 145.
  • the synchronous demodulator 145 is further connected to the clock generator 1 10 and receives from this a clock signal indicative of the phase position of the outputs of the clock generator 1 10 provided signals.
  • the signals provided by the clock generator 110 are balanced square wave signals, one of the output signals may be used as a clock signal.
  • the synchronous demodulator 145 essentially switches the measurement signal received from the input amplifier 140 to its upper or lower output on the basis of the clock signal provided by the clock generator 110.
  • the two outputs of the synchronous demodulator 145 are connected to an integrator
  • integrating comparator 150 which is constructed here by way of example in the form of an operational amplifier connected to two resistors and two capacitors. Other embodiments are also possible, for example as an active low pass.
  • a digital version of the integrating comparator 150 is also conceivable, in which the signal at the output of the synchronous demodulator is converted analogously to digital at one or more times within a half-wave and then compared with the corresponding value from the next half-cycle. The difference is integrated and e.g. converted back into an analog signal and used to control the amplifier 115, 120. While the synchronous demodulator 145 provides the measurement signal received from the input amplifier 140 at the bottom of its outputs, the integrator 150 integrates this signal over time and provides the result at its output. While the synchronous demodulator 145 provides the measurement signal received from the input amplifier 140 at its upper output, it is integrated by the integrator 150 inverted over time and the result at
  • Output of the integrator 150 is provided.
  • the voltage at the output of the tegrators 150 is the integral of the difference of the low-pass filtered outputs of the synchronous demodulator 145.
  • a microcomputer 165 may be connected to the control inputs of the controllable amplifiers 115, 120. Microcomputer 165 compares the provided signal with a threshold and outputs at output 170 a signal indicative of the metallic object. The signal may be presented to a user of the line locator 105 in an optical and / or audible manner.
  • the microcomputer 165 can carry out a further processing of the signals picked up by the control inputs of the controllable amplifiers 115, 120 and, depending on their parameters, control parameters of the measuring device 100. For example, a frequency or waveform of the alternating voltages at the outputs of the clock generator 110 may be varied or a sensitivity of the receiving amplifier 140 may be changed. In another embodiment, further of the illustrated elements of the measuring device 100 are implemented by the microcomputer 165, such as the clock generator 110, the synchronous demodulator 145, or the integrator 150.
  • the same signal of the integrator 150 is also used to control the gain factors of the controllable amplifiers 15 and 120, the second controllable amplifier 120 being connected directly to the output of the integrator 150 and the first controllable amplifier 115 being connected by means of an inverter 160 is connected to the output of the integrator 150.
  • the inverter 160 effects a reversal of the signal provided to it in such a way that, as a function of the output signal of the integrator 150, the amplification factor of the first controllable amplifier 15 increases as the amplification factor of the second controllable amplifier 120 decreases or vice versa. It is also conceivable that only the amplification factor of one of the two controllable amplifiers 15, 120 is controlled, while the amplification factor of the second controllable amplifier 15, 120 is kept at a fixed value.
  • the part of the measuring device 100 described so far is a push-pull measuring bridge, by means of which a differential determination of impedances of the two complex resistors 125 and 130 can be carried out.
  • a signal is output when the impedances of the complex walls 125 and 130 differ from each other by more than a predetermined amount. Due to the differential measurement of the impedances of the complex resistors 125, 130 in the present measuring device, a disturbing influence which equally affects both complex resistances, for example a temperature or aging influence, is compensated by corresponding changes in both complex resistors 125, 130.
  • the measuring device 100 comprises a further circuit part described in more detail below for influencing the second complex Wderstands 130 in response to an alternating electromagnetic field, so that a determination of the alternating current-carrying conductor is possible.
  • the second complex resistor 130 is variable by means of a control voltage.
  • the variable second complex resistor 130 may include a capacitance diode, a bipolar transistor, a field effect transistor (FET) or a MOSFET for voltage controlled variation of its impedance.
  • the control voltage of the second complex Wderstands 130 is provided by a probe 175, which is located in the region of an AC-carrying conductor 180.
  • the conductor 180 is part of an AC power supply network that is operated in the high-voltage range, for example, with 110, 230 or 380V or in the low-voltage range, for example, with about 6V, 12V or 24V.
  • the probe 175 can comprise an electrode 177 for receiving an electric field or, in a second embodiment, a magnetic field probe 179, for example based on a Hall sensor or a variant of a GMR sensor.
  • the AC signal is optionally limited to a predetermined frequency range by means of a bandpass 185 and also optionally amplified by means of an amplifier 190 before being applied as a control voltage to the variable second complex buffer 130.
  • the bandpass 185 may also suppress a portion of the voltage provided by the probe 175 that varies in a manner that does not correspond to a predetermined manner. This manner may include, for example, a sinusoidal or rectangular variation having a predetermined duty cycle. As will be explained in greater detail below with reference to FIG. 5, this suppression may be combined in combination with the selective generation of a variation of the electromagnetic field in the region of the conductor 180 in the predetermined manner to associate a component of an electromagnetic field determined by the probe 175 to facilitate the line 180.
  • the suppression functionality may also be provided outside the bandpass 185, for example, by the amplifier 190.
  • the amplifier 190 and bandpass 185 may also be reversed in position. Furthermore, a rectifier, not shown in FIG. 1, may be provided in the signal chain between the probe 175 and the first complex heat exchanger 125. Optionally, an inverting amplifier 195 is provided to alter the second complex heat sink 130 in opposition to the first complex resistor 125. In another embodiment, not shown, the second complex resistor 130 can also be changed by means of an adjusting element, so that, for example, a user can change the second complex resistor 130.
  • the bandpass 185 may be realized as a combination of a high pass and a low pass; In an alternative embodiment, instead of the bandpass 185, only one high pass or only one low pass may be provided.
  • Cutoff frequencies of the respective passes are selected in an embodiment such that preferably an AC signal is forwarded at a frequency corresponding to an operating frequency of the AC power supply network of which the conductor 180 is a part.
  • the operating frequency may be, for example, 50Hz or 60Hz, as is common in AC power grids in Europe and North America, for example.
  • a lower limit frequency of the bandpass 185 is just below 50 Hz and an upper limit frequency just above 60 Hz in order to detect both operating frequencies, but to suppress deviating operating frequencies.
  • the push-pull measuring bridge of the elements 115 to 170 described above is disturbed by bringing the impedances of the complex resistors 125, 130 into a relationship which differs from a ratio in the absence of the AC leading conductor 180 was. From this change, which is readable at the signal applied to the output 170, the conductor 180 can be closed.
  • FIG. 2 shows an alternative embodiment of a part of the measuring device 100 of FIG. 1. Shown is the section that lies to the left of the amplifiers 15, 120 and 140 in FIG. In contrast to the embodiment shown in FIG. 1, the resistors 135a and 135b here are replaced by a common heat resistor 135.
  • the first complex resistor 125 can also be controlled by means of a further control voltage, which is provided by means of a further probe 205 in the region of the alternating voltage-carrying conductor 180.
  • the further probe 205 has the same type as the probe 175, that is to say comprises a further electrode 207 if the probe 175 is an electrode 177, and a further magnetic field probe 209 if the probe 175 is a magnetic field probe 179.
  • the further control voltage is processed in the same way as the control voltage described above.
  • the further control voltage can also be provided by means of a bandpass 185 and an amplifier 190 and converted into a DC voltage by means of a rectifier, not shown.
  • the probes 175 and 205 are juxtaposed. If the line locating device 105 is moved in the horizontal direction, so that first the probe 175 and later the further probe 205 is closer than the respective other probe 175, 205 to the alternating voltage carrying conductor 180, the difference between the voltages applied to the microcomputer 165 and a previously selected one is experienced Reference potential a sign change in the moment in which the probes 175, 205 are close to the conductor 180.
  • the reference potential can be, for example
  • Mass (0 volts) or half of the operating voltage of the measuring device 100 amount.
  • This change of sign can be detected and displayed to a user of the line locator 105 by means of a suitable display device.
  • the exact position of the conductor 180 can thereby be determinable with high accuracy with respect to the two probes 175, 205.
  • interfering influences that equally affect both probes 175, 205 are eliminated in the determination result.
  • Such a disturbing influence can be formed, for example, by elements of the line locating device 105 or the user himself, who receives a surrounding electromagnetic alternating field and emits it in the region of the measuring device 100.
  • FIG. 3 shows a probe 175 in the form of electrodes 177, 207 on the measuring device 100 of FIG. 2.
  • the electrodes 177, 207 are arranged one above the other with respect to the line 180.
  • Arranged between the electrodes 177 and 207 is a shielding electrode 310 which has a larger area than the two electrodes 177 and 207 of equal size.
  • the shielding electrode 310 is located at a reference potential, which lies with respect to the alternating voltages applied to the electrodes 177 and 207 Representing mass.
  • the line search device 105 with the electrodes 177, 207 and 310 in the horizontal direction is present on the conductor 180. when moved. This results in the voltage curve also described above, the difference of the voltage applied to the microcomputer 165 voltages.
  • An electrical influence of the interference element 305 remains limited to the further electrode 207, so that it is possible to differentiate between the influence of the interference element 307 and that of the conductor 180.
  • FIG. 4 shows a further arrangement of electrodes 177, 207 on the measuring device 100 of FIGS. 2 or 3.
  • the shielding electrode 310 is omitted here.
  • FIG. 5 shows a loading module 505 comprising a variable resistance load module 510 connected to a driver 515 controlled by a microcontroller 520.
  • the load module 510 is connected to two electrical leads 525a and 525b of the conductor 180 and forms an electrical load for a mains voltage present in the conductor 180, so that an electric current I flows in the conductor wires 180a and 180b.
  • a magnetic field B is excited or amplified, which is recorded in the probe 175, which is shown as a coil.
  • the magnetic field B is dependent on the current I through the conductor wires 525a and 525b, and thus on the magnitude of the electrical resistance of the load module 510.
  • FIG. 6 shows a flow chart of a method 600.
  • a first step 605 two phase-shifted alternating voltages are generated at first terminals of the complex heat sinks 125 and 130 by means of the clock generator 110 and the controllable amplifiers 15, 120.
  • alternating voltages are controlled in such a way that an alternating voltage portion of the differential voltage which is isochronous relative to the alternating voltages and which is applied to the interconnected second terminals of the complex resistors 125 and 130 is minimized in absolute value.
  • the push-pull bridge of Figure 1 comprising elements 110 to 170, balanced.
  • a control voltage is generated by means of the electrode 175 as a function of an electromagnetic alternating field induced by the conductor 180 provided. This control voltage is used in step 620 to change the second complex resistor 130.
  • the conductor 180 is detected when the counter-bridge has to be balanced differently than before.
  • the conductor 180 is detected when the ratio of the alternating voltages of the controllable amplifiers 115 and 120 does not correspond to a ratio of impedances of the complex resistors 125 and 130 in the absence of the AC leading conductor 180.
  • the rebalancing or the change in the ratio of the impedances is caused by the control voltage, which indicates that the electrode 175 is in the region of an alternating electromagnetic field of the alternating voltage-carrying conductor 180.

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un dispositif de mesure destiné à détecter un conducteur guidant une tension alternative. Ledit dispositif comprend une source de tension destinée à produire deux tensions alternatives déphasées, deux résistances complexes dotées de premières connexions connectées aux tensions alternatives et de deuxièmes connexions connectées ensemble et sur lesquelles s'applique une tension différentielle. Ledit dispositif comprend également un dispositif de commande destiné à commander les tensions alternatives de telle manière qu'une proportion de la tension différentielle synchronisée par rapport aux tensions alternatives est réduite au minimum en volume. Le dispositif de commande est configuré pour détecter le conducteur, lorsque le rapport entre les tensions alternatives ne correspond pas à un rapport entre les résistances complexes en l'absence du conducteur. Dans ce cadre, la deuxième résistance complexe peut être modifiée au moyen d'une tension de commande et une sonde sert à fournir la tension de commande en fonction d'un champ alternatif électromagnétique induit par le conducteur.
EP11793352.3A 2010-12-20 2011-11-07 Chercheur de lignes Withdrawn EP2656114A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063546A DE102010063546A1 (de) 2010-12-20 2010-12-20 Leitungssucher
PCT/EP2011/069539 WO2012084329A2 (fr) 2010-12-20 2011-11-07 Chercheur de lignes

Publications (1)

Publication Number Publication Date
EP2656114A2 true EP2656114A2 (fr) 2013-10-30

Family

ID=45217497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11793352.3A Withdrawn EP2656114A2 (fr) 2010-12-20 2011-11-07 Chercheur de lignes

Country Status (6)

Country Link
US (1) US9372217B2 (fr)
EP (1) EP2656114A2 (fr)
CN (1) CN103261918B (fr)
DE (1) DE102010063546A1 (fr)
RU (1) RU2013133694A (fr)
WO (1) WO2012084329A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012221326B4 (de) * 2012-11-22 2018-02-08 Robert Bosch Gmbh Ortungsgerät
MY176559A (en) * 2013-11-19 2020-08-17 Hyun Chang Lee Mobile electric leakage detection device and method
JP2018502291A (ja) * 2014-12-12 2018-01-25 コリア リサーチ インスティチュート オブ スタンダーズ アンド サイエンス 磁場センサ及び磁場測定装置
CN115666699A (zh) 2020-04-20 2023-01-31 苏尔莫迪克斯Md有限责任公司 径向球囊导管

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DE2545717A1 (de) * 1975-10-11 1977-04-21 Romih Marta Schaltungsanordnung zur messung bzw. ortung von elektromagnetischen wechselfeldern
US4639674A (en) * 1983-04-11 1987-01-27 Schonstedt Instrument Company Apparatus and method employing extraneous field compensation for locating current-carrying objects
DE3623045A1 (de) 1986-07-09 1988-01-14 Dieter Groschupp Construct Sys Verfahren und kabelsucheinrichtung zur ortung einer, insbesondere im mauerwerk verlegten elektrischen leitung
JPH0720174A (ja) * 1993-06-30 1995-01-24 Hitachi Koki Co Ltd 妨害電力検出装置
JP2002207054A (ja) * 2001-01-10 2002-07-26 Nec Tokin Corp 電圧検出装置
DE10252425A1 (de) 2002-02-21 2004-02-05 Robert Bosch Gmbh Verfahren und Meßgerät zur Ortung eingeschlossener Objekte
DE102005007803A1 (de) 2005-02-21 2006-08-24 Robert Bosch Gmbh Verfahren zur Detektion von in einem Medium eingeschlossenen Objekten sowie Messgerät zur Durchführung des Verfahrens
JP5386055B2 (ja) * 2005-08-30 2014-01-15 株式会社日立製作所 特性評価装置および特性評価方法
CN100381826C (zh) * 2005-12-06 2008-04-16 张延辉 测试电力电缆设备是否带电的检测方法
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GB2458119B (en) * 2008-03-03 2010-12-29 Radiodetection Ltd A detector for calculating the distortion of an electromagnetic field produced by a buried current carrying conductor
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DE102010043078A1 (de) * 2010-10-28 2012-05-03 Robert Bosch Gmbh Sensorvorrichtung, insbesondere Metallsensor, mit feldkompensiertem Magnetfeldsensor

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Also Published As

Publication number Publication date
CN103261918B (zh) 2016-02-03
US9372217B2 (en) 2016-06-21
RU2013133694A (ru) 2015-11-10
US20130342218A1 (en) 2013-12-26
WO2012084329A2 (fr) 2012-06-28
DE102010063546A1 (de) 2012-06-21
CN103261918A (zh) 2013-08-21
WO2012084329A3 (fr) 2012-12-20

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