SK289218B6 - Apparatus for checking electrical cable parameters and method of determining ultrasound speed in cable jacket and / or in electrical cable insulation - Google Patents
Apparatus for checking electrical cable parameters and method of determining ultrasound speed in cable jacket and / or in electrical cable insulation Download PDFInfo
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- 238000009413 insulation Methods 0.000 title claims abstract description 40
- 238000002604 ultrasonography Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 33
- 239000000523 sample Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H5/00—Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, e.g. of pressure waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0207—Ultrasonic-, H.F.-, cold- or impact welding
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Insulated Conductors (AREA)
Abstract
Description
Oblasť technikyThe field of technology
Vynález sa týka zariadenia na kontrolu parametrov elektrických káblov a spôsobu kontroly parametrov elektrických káblov. Vynález spadá do oblasti výroby elektrických káblov.The invention relates to a device for checking the parameters of electric cables and a method of checking the parameters of electric cables. The invention falls into the field of production of electric cables.
Doterajší stav technikyCurrent state of the art
Pri elektrických kábloch sa v súčasnosti kontroluje veľké množstvo parametrov (napr. izolačný odpor elektrického kábla a horľavosť polymérnych komponentov). Zariadenie na meranie izolačného odporu elektrických káblov je dnes všeobecne známe. V najjednoduchšom variante je tvorené zdrojom elektrického napätia a ampérmetrom. Jeden výstup zdroja elektrického napätia je pripojený na jeden vodič elektrického kábla a druhý výstup zdroja elektrického napätia je pripojený cez ampérmeter na druhý vodič elektrického kábla. Zo známej hodnoty elektrického napätia elektrického zdroja a prúdu zmeraného ampérmetrom sa z Ohmovho zákona stanovuje izolačný odpor elektrického kábla. Horľavosť polymérnych komponentov sa najčastejšie stanovuje na zariadení na stanovenie limitného kyslíkového čísla. Zariadenie na stanovenie limitného kyslíkového čísla je podľa [ISO 4589-2:2017, Plastics: Determination of burning behaviour by oxygen index. Part 2: Ambient-temperature test, 2017, Geneva: International Organization for Standardization] tvorené najmä valcom z kremenného skla, do ktorého je v jeho dolnej časti privádzaná zmes kyslíka s dusíkom (koncentráciu kyslíka v zmesi je možné plynulo nastaviť), v dolnej tretine valca z kremenného skla je umiestený držiak vzorky, v ktorom je prichytená vzorka. V hornej časti valca z kremenného skla je umiestnený horák, ktorým sa exponuje vzorka na jej hornom okraji. Minimálna koncentrácia kyslíka v zmesi s dusíkom, pri ktorej je možné vzorku zapáliť, predstavuje limitné kyslíkové číslo.A large number of parameters are currently being checked for electric cables (e.g. insulation resistance of the electric cable and flammability of polymer components). The device for measuring the insulation resistance of electric cables is widely known today. In the simplest variant, it consists of a source of electric voltage and an ammeter. One output of the electric voltage source is connected to one conductor of the electric cable and the other output of the electric voltage source is connected through an ammeter to the other conductor of the electric cable. From the known value of the electrical voltage of the electrical source and the current measured by the ammeter, the insulation resistance of the electrical cable is determined from Ohm's law. The flammability of polymer components is most often determined on a device for determining the limiting oxygen number. The device for determining the limit oxygen number is according to [ISO 4589-2:2017, Plastics: Determination of burning behavior by oxygen index. Part 2: Ambient-temperature test, 2017, Geneva: International Organization for Standardization] formed mainly by a cylinder made of quartz glass, into which a mixture of oxygen and nitrogen is supplied in its lower part (the concentration of oxygen in the mixture can be continuously adjusted), in the lower third the quartz glass cylinder is the placed sample holder in which the sample is attached. A burner is placed in the upper part of the quartz glass cylinder, which exposes the sample on its upper edge. The minimum concentration of oxygen in a mixture with nitrogen at which the sample can be ignited is the limiting oxygen number.
Spoločnou nevýhodou opísaných zariadení rovnako ako prakticky všetkých dnes známych zariadení je fakt, že neumožňujú kontinuálnu kontrolu komponentov, z ktorých sa elektrické káble vyrábajú, ale umožňujú len kontrolu už vyrobených elektrických káblov.A common disadvantage of the described devices, as well as practically all devices known today, is the fact that they do not allow continuous control of the components from which the electric cables are made, but only allow the control of already produced electric cables.
Uvedené nedostatky v čiastočnej alebo úplnej miere poskytli možnosť riešiť tento problém vhodnými technickými prostriedkami. Výsledkom tohto úsilia je ďalej opisované zariadenie na kontrolu parametrov elektrických káblov a spôsob kontroly parametrov elektrických káblov podľa predkladaného vynálezu.The mentioned deficiencies partially or fully provided the possibility to solve this problem by appropriate technical means. The result of this effort is the device for checking the parameters of electric cables and the method of checking the parameters of electric cables described below according to the present invention.
Podstata vynálezuThe essence of the invention
Uvedené nedostatky sú v podstatnej miere odstránené zariadením na kontrolu parametrov elektrických káblov a spôsobom kontroly parametrov elektrických káblov.The mentioned shortcomings are largely eliminated by the device for checking the parameters of electric cables and the method of checking the parameters of electric cables.
Zariadenie na kontrolu parametrov elektrických káblov je tvorené výrobným zariadením elektrických vodičov alebo zásobníkom elektrických vodičov, z ktorého sú elektrické vodiče vedené do súboru zariadení na úpravy elektrických vodičov, z ktorého sú elektrické vodiče vedené do zariadenia na výrobu elektrických káblov, ktorého výstupom je elektrický kábel.The equipment for checking the parameters of electric cables is formed by the production equipment of electric wires or the storage of electric wires, from which the electric wires are led to a set of equipment for the treatment of electric wires, from which the electric wires are led to the equipment for the production of electric cables, the output of which is an electric cable.
Podstata zariadenia na kontrolu parametrov elektrických káblov podľa vynálezu spočíva v tom, že za výrobným zariadením elektrických káblov je zaradená ultrazvuková sonda merania hrúbky plášťa elektrického kábla a/alebo pred zariadením na úpravy elektrických vodičov sú zaradené ultrazvukové sondy merania hrúbky izolácií elektrických vodičov. Výstupy ultrazvukovej sondy merania hrúbky plášťa elektrického kábla a/alebo výstupy ultrazvukových sond merania hrúbky izolácií elektrických vodičov sú pripojené na ultrazvukový merač hrúbky plášťa elektrického kábla alebo hrúbky izolácií elektrických vodičov.The essence of the device for checking the parameters of electric cables according to the invention is that an ultrasonic probe for measuring the thickness of the electric cable sheath is placed behind the electric cable production device and/or ultrasonic probes for measuring the thickness of the insulation of electric wires are placed in front of the device for treating electric wires. The outputs of the ultrasonic probe for measuring the thickness of the electric cable sheath and/or the outputs of the ultrasonic probes for measuring the thickness of the electrical conductor insulation are connected to the ultrasonic meter of the thickness of the electrical cable sheath or the thickness of the electrical conductor insulation.
Podstata spôsobu kontroly parametrov elektrických káblov opísaným zariadením spočíva v tom, že sa stanovuje rýchlosť šírenia ultrazvuku v plášti a/alebo v izolácii vodičov elektrického kábla, kde rýchlosť v šírenia ultrazvuku v plášti elektrického kábla alebo v izoláciách elektrických vodičov elektrických káblov sa určuje:The essence of the method of checking the parameters of electric cables with the described device is that the speed of propagation of ultrasound in the sheath and/or insulation of the conductors of the electric cable is determined, where the speed of propagation of ultrasound in the sheath of the electric cable or in the insulation of the electrical conductors of the electric cables is determined:
- zo známej hrúbky l plášťa elektrického kábla alebo izolácií elektrických vodičov;- from the known thickness l of the sheath of the electric cable or the insulation of the electric conductors;
- z rýchlosti v' šírenia ultrazvuku nastavenej na ultrazvukovom merači hrúbky;- from the ultrasound propagation speed v' set on the ultrasonic thickness gauge;
- z hrúbky 1' plášťa elektrického kábla alebo izolácií elektrických vodičov zmeranej ultrazvukovým meračom hrúbky pri nastavenej rýchlosti v' šírenia ultrazvuku podľa vzťahu:- from the thickness 1' of the sheath of the electric cable or the insulation of the electric conductors measured by an ultrasonic thickness gauge at the set velocity v' of the propagation of ultrasound according to the relationship:
v = p· · v’ (m. s-1).v = p · · v' (m. s -1 ).
Spôsob využíva nepriame zmeranie rýchlosti šírenia ultrazvuku v izoláciách elektrických vodičov a v plášti elektrického kábla, ktorý spĺňa požadované vlastnosti a parametre (napr. trieda reakcie na oheň, doplnkové klasifikácie triedy reakcie na oheň, izolačný odpor, elektrická pevnosť, odolnosť proti stanoveným vplyvom prostredia a pod.). Takto určená hodnota rýchlosti šírenia ultrazvuku sa porovnáva s hodnotou rýchlosti šírenia ultrazvuku v izoláciách elektrických vodičov a v plášti elektrického kábla, meranou kontinuálne, polokontinuálne alebo diskontinuálne počas výroby elektrického kábla. Odchýlka v rýchlostiach šírenia ultrazvuku v porovnaní s hodnotami určenými pre kábel spĺňajúci požadované vlastnosti a parametre indikuje odchýlku vo výrobnom procese (napr. nekvalitná vstupná surovina, nesprávne nastavená teplota tavenia materiálu, z ktorého sa vyrába izolácia elektrických vodičov alebo plášť elektrického kábla, odchýlka v zložení alebo množstve aditívnych látok a pod.), ktorá môže byť príčinou straty požadovaných vlastností a parametrov elektrického kábla. Rýchlosť šírenia ultrazvuku je meraná nepriamo prostredníctvom ultrazvukového merača hrúbky. Pri známej hrúbke izolácie elektrických vodičov alebo plášťa elektrického kábla l (m) sa rýchlosť šírenia ultrazvuku v (m.s-1) počíta z rýchlosti ultrazvuku v' (m.s-1) nastavenej na ultrazvukovom merači hrúbky a hrúbky izolácie elektrických vodičov alebo plášťa elektrického kábla 1' (m) zmeranej ultrazvukovým meračom hrúbky.The method uses the indirect measurement of the speed of propagation of ultrasound in the insulation of electrical conductors and in the sheath of an electrical cable that meets the required properties and parameters (e.g. class of reaction to fire, additional classifications of the class of reaction to fire, insulation resistance, electrical strength, resistance to specified environmental influences, etc. .). The value of the speed of ultrasound propagation determined in this way is compared with the value of the speed of propagation of ultrasound in the insulation of electrical conductors and in the jacket of the electrical cable, measured continuously, semi-continuously or discontinuously during the production of the electrical cable. A deviation in the speed of ultrasound propagation compared to the values determined for a cable meeting the required properties and parameters indicates a deviation in the production process (e.g. low-quality input raw material, incorrectly set melting temperature of the material from which the insulation of electric wires or the jacket of the electric cable is made, deviation in composition or the amount of additive substances, etc.), which can be the cause of the loss of the required properties and parameters of the electric cable. The speed of propagation of ultrasound is measured indirectly by means of an ultrasonic thickness gauge. With a known thickness of the insulation of electrical conductors or the sheath of an electrical cable l (m), the speed of propagation of ultrasound in (ms -1 ) is calculated from the speed of ultrasound v' (ms -1 ) set on the ultrasonic thickness gauge and the thickness of the insulation of electrical conductors or the sheath of an electrical cable 1 ' (m) measured by an ultrasonic thickness gauge.
Výhody zariadenia na kontrolu parametrov elektrických káblov a spôsobu kontroly podľa vynálezu sú zjavné z účinkov, ktorými sa prejavujú navonok. Originalita predloženého riešenia spočíva v tom, že odchýlka v rýchlostiach šírenia ultrazvuku v porovnaní s hodnotami stanovenými pre kábel spĺňajúci požadované vlastnosti a parametre indikuje odchýlku vo výrobnom procese (napr. nekvalitná vstupná surovina, nesprávne nastavená teplota tavenia materiálu, z ktorého sa vyrába izolácia elektrických vodičov alebo plášť elektrického kábla, odchýlka v zložení alebo množstve aditívnych látok a pod.), ktorá môže byť príčinou straty požadovaných vlastností a parametrov elektrického kábla.The advantages of the device for checking the parameters of electric cables and the checking method according to the invention are obvious from the effects they manifest externally. The originality of the presented solution lies in the fact that the deviation in the propagation speeds of ultrasound compared to the values determined for a cable meeting the required properties and parameters indicates a deviation in the production process (e.g. low-quality input raw material, incorrectly set melting temperature of the material from which the insulation of electric wires is made or sheath of the electric cable, deviation in the composition or amount of additive substances, etc.), which may be the cause of the loss of the required properties and parameters of the electric cable.
Prehľad obrázkov na výkresochOverview of images on drawings
Zariadenie na kontrolu parametrov elektrických káblov a spôsob kontroly podľa vynálezu budú bližšie objasnené na výkrese, kde na obr. je v bočnom čiastočnom reze znázornené celkové usporiadanie častí zariadenia.The device for checking the parameters of electric cables and the checking method according to the invention will be explained in more detail in the drawing, where in fig. the overall arrangement of the parts of the device is shown in a partial side section.
Príklady uskutočnenia vynálezuExamples of implementation of the invention
Jednotlivé uskutočnenia vynálezu sú predstavené na ilustráciu a nie ako obmedzenia konkrétnych realizácií. Odborníci znalí stavu techniky nájdu alebo budú schopní s použitím nie viac ako rutinného experimentovania zistiť mnoho ekvivalentov k špecifickým uskutočneniam vynálezu. Aj takéto ekvivalenty budú spadať do rozsahu nasledujúcich patentových nárokov. Odborníkom znalým stavu techniky nemôže robiť problém optimálne navrhnutie konštrukcie a výber jeho prvkov, preto tieto znaky neboli detailne riešené.Individual embodiments of the invention are presented for illustration and not as limitations of specific implementations. Those skilled in the art will find or be able to discover, using no more than routine experimentation, many equivalents to specific embodiments of the invention. Such equivalents will also fall within the scope of the following patent claims. The optimal design of the structure and the selection of its elements cannot be a problem for an expert familiar with the state of the art, therefore these features have not been dealt with in detail.
Príklad 1Example 1
V tomto príklade konkrétneho uskutočnenia vynálezu je opísané zariadenie na kontrolu parametrov elektrických káblov, ako je znázornené na obr. Tvorené je výrobným zariadením 1 elektrických vodičov 2 alebo zásobníkom elektrických vodičov 2, z ktorého sú elektrické vodiče 2 vedené do zariadení 5 na úpravy elektrických vodičov 2, z ktorého sú elektrické vodiče 2, 6 vedené do montážneho zariadenia 7 elektrických káblov, ktorého výstupom je elektrický kábel 8. Elektrické vodiče 2 pozostávajú z jadier 3 elektrických vodičov 2 a izolácií 4 elektrických vodičov 2. Vyrobený elektrický kábel 8 pozostáva z jadier 3 elektrických vodičov 2, izolácií 4 elektrických vodičov 2, výplne 9 a plášťa 10. Rýchlosti šírenia ultrazvuku v izoláciách 4 elektrických vodičov 2 sú nepriamo snímané ultrazvukovými sondami 11 hrúbky izolácií 4 elektrických vodičov 2. Rýchlosť šírenia ultrazvuku v plášti 10 elektrického kábla 8 je nepriamo snímaná ultrazvukovou sondou 12 hrúbky plášťa 10 elektrického kábla 8. Ultrazvukové sondy 11 hrúbky izolácií 4 elektrických vodičov 2 a ultrazvuková sonda 12 hrúbky plášťa 10 elektrického kábla 8 sú pripojené na ultrazvukový merač 13 hrúbky, ktorý kontinuálne, polokontinuálne alebo diskontinuálne meria hrúbku izolácií 4 elektrických vodičov 2 a plášťa 10 elektrického kábla 8.In this example of a specific embodiment of the invention, a device for checking the parameters of electric cables is described, as shown in fig. It consists of a production device 1 of electric wires 2 or a reservoir of electric wires 2, from which the electric wires 2 are led to the device 5 for the treatment of electric wires 2, from which the electric wires 2, 6 are led to the assembly device 7 of electric cables, the output of which is electric cable 8. Electric conductors 2 consist of cores of 3 electric conductors 2 and insulation of 4 electric conductors 2. Manufactured electric cable 8 consists of cores of 3 electric conductors 2, insulation of 4 electric conductors 2, filling 9 and jacket 10. Velocities of ultrasound propagation in insulations 4 of electrical conductors 2 are indirectly sensed by ultrasonic probes 11 of the thickness of the insulation 4 of electrical conductors 2. The speed of propagation of ultrasound in the sheath 10 of the electrical cable 8 is indirectly sensed by the ultrasonic probe 12 of the thickness of the sheath 10 of the electrical cable 8. Ultrasonic probes 11 of the thickness of the insulation 4 of electrical wires 2 and the ultrasonic probe 12 of the thickness of the sheath 10 of the electric cable 8 are connected to the ultrasonic thickness gauge 13, which continuously, semi-continuously or discontinuously measures the thickness of the insulation 4 of the electric conductors 2 and the sheath 10 of the electric cable 8.
Príklad 2Example 2
Spôsob kontroly parametrov elektrických káblov zariadením opísaným v príklade 1 je založený na tom, že sa stanovuje rýchlosť šírenia ultrazvuku v plášti a/alebo v izolácii vodičov elektrického kábla, kde rýchlosť šírenia ultrazvuku sa počíta zo známej hrúbky l izolácií 4 elektrických vodičov 2 a plášťa 10 elektrického káblaThe method of checking the parameters of electric cables with the device described in example 1 is based on the fact that the speed of propagation of ultrasound in the jacket and/or in the insulation of the conductors of the electric cable is determined, where the speed of propagation of ultrasound is calculated from the known thickness l of the insulation 4 of the electric conductors 2 and the jacket 10 electric cable
8, z nastavenej rýchlosti v' šírenia ultrazvuku na ultrazvukovom merači 13 hrúbky a z hrúbky ľ izolácií 4 elektrických vodičov 2 a plášťa 10 elektrického kábla 8 zmeraných ultrazvukovým meračom 13 hrúbky podľa vzťahu:8, from the set velocity v' of ultrasound propagation on the ultrasonic thickness gauge 13 and from the thickness 1 of the insulation 4 of the electrical conductors 2 and the jacket 10 of the electrical cable 8 measured by the ultrasonic thickness gauge 13 according to the relationship:
v = p· · v’ (m. s-1).v = p · · v' (m. s -1 ).
Priemyselná využiteľnosťIndustrial applicability
Zariadenie na kontrolu parametrov elektrických káblov a spôsob kontroly parametrov elektrických káblov 10 nájde priemyselné využitie predovšetkým vo výrobe elektrických káblov, v stavebnom priemysle, kontrole kvality, energetike a akreditovaných skúšobniach.The device for checking the parameters of electric cables and the method for checking the parameters of electric cables 10 find industrial use primarily in the production of electric cables, in the construction industry, quality control, energy and accredited testing laboratories.
Claims (2)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SK44-2018A SK289218B6 (en) | 2018-05-17 | 2018-05-17 | Apparatus for checking electrical cable parameters and method of determining ultrasound speed in cable jacket and / or in electrical cable insulation |
| CZ2018697A CZ309311B6 (en) | 2018-05-17 | 2018-12-12 | Method and device for checking the parameters of the insulation material of electric wires and the jacket of electric cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SK44-2018A SK289218B6 (en) | 2018-05-17 | 2018-05-17 | Apparatus for checking electrical cable parameters and method of determining ultrasound speed in cable jacket and / or in electrical cable insulation |
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| Publication Number | Publication Date |
|---|---|
| SK442018A3 SK442018A3 (en) | 2019-12-02 |
| SK289218B6 true SK289218B6 (en) | 2024-07-24 |
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| SK (1) | SK289218B6 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2177528A (en) * | 1937-10-02 | 1939-10-24 | Anaconda Wire & Cable Co | Apparatus for testing layers of insulation |
| US3500185A (en) * | 1967-06-21 | 1970-03-10 | Western Electric Co | Electrode probe system monitoring diametrically opposed conductor cable sections to measure sheath thickness and eccentricity |
| SE388032B (en) * | 1972-07-05 | 1976-09-20 | Western Electric Co | PROCEDURE AND DEVICE FOR ULTRASOUND SATURATION OF THE THICKNESS OF SEQUENCE OF THE FOLLOWING SECTION OF AN ELONG |
| US3914356A (en) * | 1974-03-28 | 1975-10-21 | Western Electric Co | Methods of and apparatus for controlling the thickness of an annular extrusion |
| SE0002243L (en) * | 2000-06-16 | 2001-05-21 | Abb Ab | Ways of measuring topography in an interface and using the method of a high voltage cable |
-
2018
- 2018-05-17 SK SK44-2018A patent/SK289218B6/en unknown
- 2018-12-12 CZ CZ2018697A patent/CZ309311B6/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CZ2018697A3 (en) | 2020-01-15 |
| CZ309311B6 (en) | 2022-08-17 |
| SK442018A3 (en) | 2019-12-02 |
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