WO2016055134A1 - Procédé et un dispositif de détermination de la résistance linéaire spécifique d'une ligne multibrins - Google Patents

Procédé et un dispositif de détermination de la résistance linéaire spécifique d'une ligne multibrins Download PDF

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Publication number
WO2016055134A1
WO2016055134A1 PCT/EP2015/001780 EP2015001780W WO2016055134A1 WO 2016055134 A1 WO2016055134 A1 WO 2016055134A1 EP 2015001780 W EP2015001780 W EP 2015001780W WO 2016055134 A1 WO2016055134 A1 WO 2016055134A1
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WO
WIPO (PCT)
Prior art keywords
line
circuit
voltage
resistance
resistors
Prior art date
Application number
PCT/EP2015/001780
Other languages
German (de)
English (en)
Inventor
Thomas SCHREIWEIS
Matthias BURSTER
Original Assignee
Burster Cable Measurement 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 Burster Cable Measurement Gmbh filed Critical Burster Cable Measurement Gmbh
Priority to CH00477/17A priority Critical patent/CH711878B1/de
Publication of WO2016055134A1 publication Critical patent/WO2016055134A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/01—Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass production; Testing objects at points as they pass through a testing station
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Definitions

  • the invention relates to a method for determining the specific length resistance of a stranded line, wherein at least a first circuit by connecting a current source to the line to at least two
  • Circuit connection points of the line which have finite distance from each other, is formed and a
  • Device for determining the specific length resistance of a stranded line comprising a current source, to which the at least one first circuit is connected to the line via a first line region.
  • Rope is called.
  • the electrical specific length resistance of a line or electrical resistance per length of a line is determined as the quotient of
  • the specific length resistance is also referred to as the resistance per length of the line. He is from the material
  • Resistance of a line is determined by comparison measurements.
  • the voltage on the examined line section is compared with that on a defined resistor or a test line with known parameters. This happens either simultaneously through parallel connections
  • the latter method can serve capacitors for buffering the potentials.
  • Stranding machines and their followers components such as compressors for the line, take-off wheel or rewinder, on the one hand in electrical contact with the stranded line and on the other hand over ground with unknown electrical resistance in
  • Equalizing currents flow.
  • the currents are unknown and they overlap with the current applied by a current source. They thus lead to an incorrect value in the determination of the resistance per length of the stranded wire.
  • a disadvantage of the known method is that such unknown Ausglei hsströme not or not sufficiently detected and distort the measurement result.
  • the invention has for its object to provide a method and an apparatus which, while avoiding the o.g. Disadvantages, the determination of the specific length of resistance of a multi-stranded wire to the exclusion of the influence of unknown equalization currents allows.
  • the object is initially achieved by a generic method, which according to the invention is characterized in that voltages are taken over at least two defined line sections, wherein
  • At least one first voltage measuring circuit is provided with at least one line section is that is part of the first circuit and at least a second voltage measuring circuit with line section is not provided, which is part of the first circuit, and that means for determining a mean voltage value, which is provided over at least two defined line sections of the line measured voltages.
  • the invention achieves a - at least largely - elimination of the effects of flowing unknown equalizing currents on the measurement result. Their influence is at best in the usual tolerance ranges of
  • At least one line section is included in the circuit, at least one further line section is not part of the circuit.
  • the total resistance of the line is determined from single voltage measurements by averaging. As a result, the influences of flowing equalizing currents
  • the invention allows a very accurate
  • the resistance per length of a multi-wire cable can be determined from a plurality of individual measurements. This will the influence of compensation and interference currents at least significantly reduced. This leads to a more accurate value of the resistance per length of the stranded line in comparison to the individual measurements.
  • the current source is subjected to a defined current.
  • Such two circuits are formed by three circuit connection points of the line with finite distance from each other, wherein the two circuits have a common power source, which acts on the line with a defined current.
  • At least one voltage measurement is performed along two defined line sections between the circuit connection points for determining an average voltage over the line sections. While in principle can be carried out sequentially in time, is provided in a preferred embodiment, in particular for receiving time-varying interference currents, that the voltages are measured in measuring circuits at the same time.
  • the current source is connected to at least a first and a second circuit with successive line regions, each line region is associated with one of the circuits, wherein in particular by means of a voltage measuring unit over the resistance of the line high-resistance resistors an average voltage value of the two Line sections of the line measured un preferably an average resistance value of the line is determined therefrom.
  • the resistance per length of the line can be determined. This process step quickly leads to the desired result and is easy to implement.
  • each measuring circuit a voltage measurement is carried out, simultaneously or successively in time, wherein preferably at least one voltage measurement is performed on a line section which is connected to the first circuit and at least one voltage measurement is performed on the line section, which with the second Circuit is connected.
  • compared to the resistance of the line high-resistance resistors can be an averaged voltage value of the two
  • Line sections of the line measured and preferably from this an average resistance of the line can be determined.
  • the device either provides that two measuring circuits are connected to the line by two contacts each, and a voltage measuring unit is provided for measuring the voltage of the line at the respective line. have section or that a voltage measuring unit over the high resistance of the line
  • Resistors is connected to the two consecutive line sections of the line.
  • the power source basically generates direct current as a direct current source, it may alternatively be provided to apply alternating current to the existing circuit or individual components thereof.
  • ohmic resistances are preferably present in the former case, in the second case, in addition to ohmic resistors, it is also possible to use alternating current resistors, such as capacitors and / or coils with equivalent resistances
  • the word 'resistance' refers both to ohmic resistors and, where appropriate, to alternating current resistors with corresponding parameters. This embodiment allows the determination of the impedances of the components, which can be optimized for certain frequencies of AC operation.
  • the determined resistance per length of the multiwire cable is compared to established limits.
  • the result of the comparison can be output as a signal, in particular as an acoustic or optical signal.
  • the measurement results can also be output for further processing.
  • a signal to exceed the upper limits for the resistance values pointed out and appropriate countermeasures can be initiated promptly. Reliable quality control is thus guaranteed.
  • the contact of individual wires of a line with each other may be affected by the stranding process. Preferably, therefore, the resistors extending between insulated two-piece contacts running
  • Measurement of the resistances of the intervening line made at two points. This avoids that a part of the line, whose contact with the rest of the line is impaired, affects the determination of the resistance value of the line.
  • the arithmetic mean of both values is determined from the individual resistances of the line sections connecting the contacts by an electrical circuit with resistors connected in parallel.
  • Mean value formation can be called, can be dispensed with the use of computers in this process step. Due to the circuit, the arithmetic mean value can be tapped off via the resistors connected in parallel. It thus eliminates the material and time required for a suitably designed calculation step.
  • a contacting of the line with the measuring circuits can be designed in two parts, wherein both parts form the bearing surface for the line. This allows a measurement to be made at two positions of the line section. If the contact of a part of the line with the rest of the line is impaired, an inhomogeneous current distribution results in the cross section of the line. Due to the two-part design of the contacts impairments are reduced from an inhomogeneous current distribution of the line.
  • a part of the first contact can be connected to a part of the second contact, as well as the other two parts of the contacts to each other via a voltage measuring unit.
  • a voltage measuring unit As a result, two voltage measurements on the intermediate line section are possible. With a current distribution that is inhomogeneous over the cross section of the line, the measurement of the voltage at several circumferential points of the line reduces the risk of a faulty determination of the resistance of the line.
  • each part of the two-part contacts can be followed by a resistor which is a multiple, preferably at least ten times the value of the estimated resistances of the connections of the contacts.
  • a resistor which is a multiple, preferably at least ten times the value of the estimated resistances of the connections of the contacts.
  • resistors this is avoided.
  • two resistors of each part of a contact on its side facing away from the line may be connected to each other with a common voltage measuring unit.
  • the average value of the individual voltages is applied to the voltage measuring device and can be used to determine the resistance.
  • the determination of the resistance of the line achieved in this way is less susceptible to errors than a determination from the individual voltages with respect to statistical fluctuations.
  • Inventive developments of the device can provide that each connected to the circuits line areas extend from an outer circuit connection point of the line to the middle of the line between the circuit connection points. This results in the division of the line to two equal length line areas.
  • the line resistances are approximately equal, whereby equal currents flow on both line areas.
  • the measured voltages of the line sections can then be averaged and then divided by the current to maintain the resistance of the line. The calculation and averaging of the individual resistances are thus eliminated.
  • measuring line sections connected to one another in this way can have a common voltage measuring unit, which is designed to measure the voltage of two successive measuring line sections, each in a different circuit.
  • a voltage measuring unit is provided which is connected to two successive line sections of the line via resistors of high resistance in relation to the resistance of the line. By switching the voltage measuring unit, the voltages of both line sections can be measured with a voltage measuring unit. Is the measurement and the subsequent switching sufficiently fast
  • the existing measuring circuits may comprise resistors whose resistance values of a multiple of the ge ⁇ estimated resistance values of the wiring portions which are connected to the respective circuits, preferably at least ten times that amount.
  • resistors whose resistance values of a multiple of the ge ⁇ estimated resistance values of the wiring portions which are connected to the respective circuits, preferably at least ten times that amount.
  • voltage drops are reduced at those not belonging to the respective line section components of the measuring circuits. This leads to a high accuracy of the determined
  • the device may have a circuit for metrological / physical, ie analog averaging.
  • an averaging is not carried out by explicit calculation of, for example, a computing unit, but the averaged voltage value can be tapped as a voltage. This eliminates the need for a device to be made outside the circuit averaging.
  • Analog averaging provides the
  • the mean is by nature less susceptible to statistical fluctuations than its individual values.
  • an evaluation unit can be provided, which determines the resistance per length of the line from the defined current and the measured voltages.
  • Fig. 1 is a schematic view of an inventive
  • Fig. La a section through the line of FIG. 1 with
  • Figure 2 is an electrical circuit diagram of an embodiment of the device according to the invention with a single connected circuit.
  • 2a shows an electrical circuit diagram of a further embodiment of the device according to the invention with two connected circuits.
  • Fig. 3 is an electrical circuit diagram of a second
  • Fig. 4 is a schematic view of another
  • the line 1 in FIG. 1 is designed as a stranded line 1.
  • a stranding machine With a stranding machine several non-insulated individual wires were made into a stranded line 1 by means of stranding.
  • a compressor In the production environment - at 4.4 (not shown physically) - a compressor is present, which rotates the individual wires of the stranded line 1 against each other and thus reduces the line cross-section.
  • a take-off wheel - at 4.2 (not shown physically) - is used to guide the line 1.
  • a rewinder winds the line 1 produced on a
  • FIG. 2a shows an embodiment in which the current source 4.1 via the circuit connection points 4.2, 4.3 in a first circuit and via
  • Circuit is connected to the line 1.
  • a measuring circuit 2, 3 is connected to the line 1 via two contacts 2.1, 2.2, 3.1, 3.2.
  • the contacts 2.1, 2.2, 3.1, 3.2 are formed as U- or here as V-shaped contacts, which are referred to as cutting and are in pairs at a defined axial distance from each other.
  • the cutting edges have components made of metal and in particular of brass. The cutting edges can consist of individual elements which are in contact with the line 1 and are insulated from one another, as will be described in detail later.
  • the associated electrical circuit diagram is shown in FIG. 2
  • the circuit connection points 4.2, 4.3 (the latter in FIG. 2a) can be seen on the line 1 extending therebetween.
  • the outer circuit connection points 4.2, 4.4 are - as stated - contacts of the line 1 with the components from the manufacturing environment Resistor 5.1, 5.2 provided with a ground connection 6.1, 6.2.
  • a measuring circuit 2, 3 is connected in each case. Both measuring circuits 2, 3 have an identical structure: About each two contacts 2.1, 2.2, 3.1, 3.2 is one each
  • the length of the line section 2.3, 3.3 is determined by the distance between two contacts 2.1, 2.2, 3.1, 3.2 of a measuring circuit 2, 3. This distance is fixed predetermined and preferably the same for both measuring circuits 2, 3. However, the length can in principle also be different and this be taken into account mathematically.
  • the measurement of the resistance of the line 1 is after
  • a stranded from several individual wires line 1 passes through the take-off wheel to the rewinder. For measurement, the processing process is briefly stopped.
  • the cable 1 is connected via the circuit connection points 4.2, "4.3 with the power source 4.1
  • a first measuring circuit 2 is connected between the circuit connection point 4.2 of the take-off wheel and the middle one
  • Circuit connection point 4.3 by two contacts 2.1, 2.2 connected to the line 1.
  • the contacts 2.1, 2.2 have a defined distance from each other.
  • Its contacts 3.1, 3.2 have - here - the same distance as those of the first measuring circuit 2.
  • the Contacts 2.1, 2.2, 3.1, 3.2 are - as stated - designed as a V-shaped cutting.
  • Both measuring circuits 2, 3 are each provided with a voltage measuring unit 2a, 3a
  • the current source 4.1 of the circuit now acts on the line 1 with a defined current. Two kinds of currents flow in this arrangement through the line 1: Despite the existing resistors 5.1, 5.2 between the outer
  • Circuit connection points 4.2, 4.4 of the line 1 and the ground terminals 6.1, 6.2 can flow compensating currents along the line 1. Equalizing currents can come from mutually different ground potentials 6.1, 6.2. The direction of the compensation current is at a certain time along the line 1 in both
  • Sections 2.3, 3.3 are the same.
  • the currents introduced by the current source 4.1 flow along the line 1, in particular also to the ground connections 6.1, 6.2.
  • the directions of the currents introduced by the circuit are determined by relevant laws of electrical engineering in the circuit connection points 4.2, 4.3 and are directed against the line 1 at a certain time in sections 2.3, 3.3 along the line.
  • the measuring circuits 2, 3 serve to measure the voltage drop across the respective line sections 2.3, 3.3 lying between the contacts 2.1, 2.2 and 3.1, 3.2. From the knowledge of the voltage drop across the line sections 2.3, 3.3 and their defined lengths, the resistance per length of the line 1 of the line sections 2.3, 3.3 can be determined. The total value for the resistance per length of the line 1 is the arithmetic mean of the two
  • Interference currents are time-varying currents that may be caused by components of the stranding machine. If the measurement is performed, for example, by a single, between the line sections 2.3, 3.3 switchable voltmeter 2a, 3a immediately in time, this also applies in the context of accepted tolerances with respect to such a measurement sequence small temporal changes of the interference currents. Denote - as indicated in Fig. 2 - R2, R3, the resistances of the (measuring) sections 2.3, 3.3, I2, I3, respectively flowing through these line sections current and U 2 , U3, via the line sections 2.3, 3.3 measured
  • the device according to the invention compensates for simultaneous voltage measurement of the measuring circuits 2, 3
  • Voltage measuring unit 2a, 3a which is switched between sections 2.2, 3.2, are used. First, the voltage drop is measured at a defined line section 2.3. After detection of the voltage value and
  • Circuit 4.5 is connected via the middle circuit connection point 4.3 and the other, external circuit connection point 4.4, as shown in Fig. 2a. Both circuits 4, 4.5 have the same power source 4.1.
  • Fig. 3 describes a further development of
  • Fig. 3 shows the already mentioned embodiment with two Circuits 4, 4.5 according to Fig.2a. It can also be a single circuit of FIG. 2 are used. Both measuring circuits 2, 3 are now each provided with two additional resistors 2.4, 2.5, 3.4, 3.5. The value of these resistors is a multiple, preferably at least ten times the value of the resistors R 2 , 3 of
  • the middle circuit connection point 4.3 of the current source 4.1 close to 2.2, 3.1 connected to the line 1 resistors 2.5, 3.4 and the line 1 at 2.1, 3.2 corresponding contacting resistors 2.4, 2.5 are each connected to the line 1 side facing each other, while the voltage measuring unit 2.6 between the one hand
  • Resistor group 2.5, 3.4 and on the other hand, the resistor group 2.4, 3.5 is arranged.
  • the necessity of measuring two voltages and the mathematical determination of the mean voltage U m across the line sections 2. 3, 3. 3 are omitted. Rather, arises in the common
  • Voltage measuring unit 2.6 the arithmetic mean value U m of the measuring voltages. Due to the flowing currents and this "analog" averaging and the resistance per length of the line 1 - metrologically / physically determined according to formula (6). The computational averaging is omitted with this arrangement and is replaced by the device-related "physical” averaging of the voltages. The effects of compensating and interference currents occurring are compensated.
  • the contacts 2.1, 2.2, 3.1, 3.2 of the measuring circuits 2, 3 are preferably as two-piece (or multi-part) cutting with mutually isolated Contact areas formed (Fig. 1, Fig. La, Fig. 4).
  • the cutting 2.1, 2.2 are used for electrical contacting of the stranded line 1 with the measuring circuits 2, 3 and especially in Fig. 4 with the
  • FIG. 4 The electrical connection of two cutting edges 2.1, 2.2 is shown in FIG. 4. In each case a part of a cutting edge 2.1 is connected to a part of the other cutting edge 2.2.
  • the intermediate line sections 2.7, 2.8 are again symbolized in the drawings as resistors. By means of voltage measurements, the voltages falling across the line sections 2.7, 2.8 are measured.
  • Contacts 2.1, 2.2 have the advantage of considering inhomogeneous current distributions along the circumference of the line 1. For example, in the manufacturing process, a group of wires of line 1 may be in impaired contact with the remainder of the wires.
  • Measurement at - at least - two circumferential points of the line 1 deviations can be detected by a consequent, inhomogeneous power distribution.
  • resistors 2.9, 2.10, 2.11, 2.12 connect. Their value is a multiple, preferably ten times the estimated line resistance 2.7, 2.8. In this way, a flow of currents through the additionally arranged resistors 2.9, 2.10, 2.11, 2.12 is avoided.
  • a common voltage measuring unit 2.13 is connected between the resistances 2.9, 2.10 of a cutting edge 2.1, on the one hand, and those 2.11, 2.12 of the other cutting edge 2.2, on the other hand. At her falls due to the circuit arrangement, the arithmetic mean of the individual voltages 2.7, 2.8 of the line 1 from. This device is insensitive to inhomogeneously distributed along the circumference of the conduit 1 streams.
  • the resistance per length of the line 1 is determined on the basis of the measured voltages and the defined currents and line sections 2.3, 3.3 and compared directly with specified limit values.
  • the evaluation unit 7 gives the result of the comparison directly as optical and / or
  • acoustic warning signal off.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

L'invention concerne un procédé et un dispositif de détermination de la résistance linéaire d'un câble multibrins ; pour déterminer la résistance linéaire spécifique d'une ligne multibrins (1), au moins un premier circuit de courant (4) est formé par connexion d'une source de courant (4.1) à la ligne (1) en au moins deux points de connexion de circuit de courant (4.2, 4.3) de la ligne (1) qui se trouvent à une distance finie l'un de l'autre. Selon l'invention, pour isoler de façon sûre des courants transitoires inconnus du résultat de la mesure, des tensions sont prélevées sur au moins deux sections de ligne définies (2.3, 3.3) ; au moins une section de ligne (2.3) se trouve dans le premier circuit (4) et au moins une deuxième section de ligne (3.3) ne se trouve pas dans le premier circuit (4), et une valeur moyenne de tension (Um) est déterminée à partir des au moins deux tensions mesurées.
PCT/EP2015/001780 2014-10-10 2015-09-04 Procédé et un dispositif de détermination de la résistance linéaire spécifique d'une ligne multibrins WO2016055134A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH00477/17A CH711878B1 (de) 2014-10-10 2015-09-04 Verfahren und Vorrichtung zum Bestimmen des spezifischen Längenwiderstandes einer mehrdrähtigen Leitung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014014781.9A DE102014014781A1 (de) 2014-10-10 2014-10-10 Verfahren und Vorrichtung zum Bestimmen des spezifischen Längenwiderstandes einer mehrdrähtigen Leitung
DE102014014781.9 2014-10-10

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WO2016055134A1 true WO2016055134A1 (fr) 2016-04-14

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CH (1) CH711878B1 (fr)
DE (1) DE102014014781A1 (fr)
WO (1) WO2016055134A1 (fr)

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CN114740053A (zh) * 2022-03-31 2022-07-12 河南四方达超硬材料股份有限公司 金刚石合成用发热管分选方法及发热管电阻测量方法

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DE2557903A1 (de) * 1974-12-24 1976-07-08 Jeumont Schneider Verfahren und vorrichtung zur kontrolle des elektrischen widerstands einer gegebenen laenge eines in herstellung begriffenen stranges eines elektrischen kabels
DE2923585B1 (de) * 1979-06-11 1980-07-17 Siemens Ag Verfahren und Schaltungsanordnung zur Messung der Aderwiderstaende von Verseilelementen

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CN114740053A (zh) * 2022-03-31 2022-07-12 河南四方达超硬材料股份有限公司 金刚石合成用发热管分选方法及发热管电阻测量方法

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DE102014014781A1 (de) 2016-04-14

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