CN101713634A - Eccentricity gauge for wires and cables and method for measuring concentricity - Google Patents
Eccentricity gauge for wires and cables and method for measuring concentricity Download PDFInfo
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- CN101713634A CN101713634A CN200810161966A CN200810161966A CN101713634A CN 101713634 A CN101713634 A CN 101713634A CN 200810161966 A CN200810161966 A CN 200810161966A CN 200810161966 A CN200810161966 A CN 200810161966A CN 101713634 A CN101713634 A CN 101713634A
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Abstract
The invention relates to an eccentricity gauge for wires and cables and a method for measuring concentricity. Three measuring planes are used for measuring the position of a conductor in an insulating sheath, wherein at least one measuring plane can determine the position of the conductor, and at least one measuring plane can determine the position of the surrounding edge of an external sheath.
Description
Technical field
The present invention relates to be used to measure the concentricity of cable or wire and the system of diameter.Particularly, the present invention relates to be used for the concentricity of non-contact measurement cable or wire and the system and method for diameter.
Background technology
During insulated cable and electric wire manufacturing, people wish to guarantee that conductor (for example, tinsel) accurately is in the center that covers insulating material wiry.In order to measure its concentricity, way is location and the periphery that quantizes insulating material the most easily, measures the position of conductor wherein then.
For the discussion here, conductor is made by the internal material of conduction.Outer sleeve comprises insulating material.Both combinations are called cable.Difference between these two positions of conductor center and outer sleeve center is defined as degree of eccentricity.
It is useful using non-contact measurement device measuring cable when cable forms, because when it leaves extruder, insulating material is warm, soft and easy the damage.Typically, optics or magnetic equipment are used for this purpose.During forming process, cable in extrusion longitudinally constant speed move.Because also experiencing laterally, the vibration in the described tinsel, cable move.Historical way is to measure the diameter of outer insulator and the position of conductor in the same point along cable axis, to obtain the best readings of degree of eccentricity.
Current idea is to use optics and Magnetic Measurement device, and these devices are positioned on the same measurement plane perpendicular to the cable longitudinal axis.Current, it is believed that if measurement plane is in the different position along cable axis, the actual degree of eccentricity of distinguishing cable still is that angular deviation will be very difficult.Measurement mechanism will be measured at one time, otherwise cable may laterally move in the time interval, measures thereby destroy.
Equipment before a kind of shown in No. 5528141, the United States Patent (USP) of Kyriakis discloses a kind of optical flat and Magnetic Measurement plane, and mentions on tinsel the identical point place and measure, but need not measure simultaneously in same level.Another equipment shown in No. 7068359, the United States Patent (USP) of Studer discloses two magnetic transducing coils that are arranged on the optical flat both sides.Coil links together, their connected mode makes them form the single Magnetic Measurement plane consistent with the optical measurement plane, and determine and be mutually related field intensity before and after the optical measurement plane of field intensity, with definite active measurement of inductance plane consistent with the optical measurement plane.This design is to measure at single time reference.
Prior art still needs to improve.The present invention has improved prior art, and a kind of new-type system is provided, and this system is placed on measuring equipment in the independently isolated vertically zone, so that a kind of reliable measuring system to be provided, and allows to increase the space of maintenance, repairing and cleaning member.
Summary of the invention
One object of the present invention is to improve the measuring system of cable or wire.
Another purpose is to improve and is used to measure the degree of eccentricity of cable or wire and the non-contact measurement of diameter.
Another purpose is to be provided for the three point measurement systems that separate out vertically of cable or wire.
Another purpose is to provide the method for determining the position of tinsel in cable.
In the present invention, desirable is that optics and magnetic sensor are placed in the different measurement planes.This has alleviated the narrow short environment of measured zone, and provides the space for light beam and magnetic detector.This has also improved the ability that keeps sensors clean in originally with regard to dirty and environment need dust guard and air nozzle in narrow zone.
Accordingly, one aspect of the present invention relates to a kind of device, and this device is used to measure substantially the degree of eccentricity and the diameter of the elongated object that moves along the z axle.Described device comprises along isolated in the axial direction at least three the discrete measuring equipments of z axle, each equipment can obtain the object measured value in the different measuring plane at z axle predetermined point place in order to storage, wherein each plane is with respect to z axle (for example, vertical) orientation at a predetermined angle.These measured values can obtain at given predetermined instant with for the x-y point place of object area measure to be measured.According to these three groups of coordinates, degree of eccentricity can be determined and be used for from predetermined point derivation measured value.Can adopt computer based equipment to receive and store measurement values and definite degree of eccentricity.For example when measurement comprises the cable of insulating sleeve and inner wire, at least one equipment can be measured the diameter that position wiry and equipment can be measured sleeve pipe, and all the other equipment can be used to measure the diameter of tinsel or sleeve pipe.
Described device can comprise for example four kinds of different configurations, and arranges with one of four kinds of different configurations:
Two optical devices form the plane on the both sides of the magnetic apparatus that forms the magnetic plane;
Two optical devices form the plane on a side of the magnetic apparatus that forms the magnetic plane;
Two magnetic apparatus form the plane on a side of the optical device that forms optical flat; Or
Two magnetic apparatus form the plane on the both sides of the optical device that forms optical flat, wherein said equipment is orientated and makes described plane keep common angle with respect to cable when cable moves.
The present invention also is provided for measuring substantially the degree of eccentricity of the elongated object that moves along the z axle and the method for diameter.The present invention includes step: (a) adopt along isolated in the axial direction at least three the discrete measurement mechanisms of z axle, make each device can obtain the object measured value in the different measuring plane at z axle predetermined point place, wherein each plane is with respect to z axle (for example, vertical) orientation at a predetermined angle; (b) when movement of objects, obtain measured value with each equipment, obtain three groups of x-y-z coordinates in object zone to be measured thus at given predetermined instant; (c) use these three groups of coordinates to determine the degree of eccentricity of object; (d) calculate the diameter of object according to the degree of eccentricity of gained.This method can be preferably used for measuring cable or wire.
Description of drawings
Figure 1A is the perspective schematic view of the embodiment of the invention.
Figure 1B is the perspective schematic view of the embodiment of the invention.
Fig. 1 C is the perspective schematic view of the embodiment of the invention.
Fig. 1 D is the perspective schematic view of the embodiment of the invention.
Fig. 2 shows the perspective schematic view on three different measuring planes.
Fig. 3 shows the vertical view of optical measuring apparatus of the present invention.
Fig. 4 shows the vertical view of magnetic field induction measuring equipment of the present invention.
Embodiment
Referring now to accompanying drawing,, apparatus and method of the present invention are generally by Reference numeral 100,100 ', 100 " and 100 " ' expression, and be particularly suited for measuring for example degree of eccentricity and the diameter of cable 4.Parts like the similar Reference numeral representation class.During extruding (extrusion) process, cable 4 is under the tension force, thereby is straight line basically.From mathematics, 2 limit straight line in the space, and therefore, if a people measures 2 points simultaneously, such as 2 points on outer sleeve 9 or the inner conductor 3, he will know the position of the axis (z axle as illustrated in fig. 1 and 2) of cable 4.
The present invention can adopt the known biaxial optical mircrometer gauge of electric wire and cable industrial circle 7,8, so that measure diameter by accurately measuring by the shade of light beam projection.Typically but not necessarily, light beam 15x and 15y are arranged to each other in the right angle, and cable 4 and two light beam quadratures and pass this cross section.The light beam that intersects has been set up the x-y measurement plane, one of them light beam 15x measurement of x coordinate, and another light beam 15y measures the y coordinate.Typically but not necessarily, cable 4 passes measurement plane 13 orthogonally.
In one case, the present invention can adopt a pair of biaxial optical mircrometer gauge 7,8 of spaced apart certain distance, can determine that outer sleeve 9 is along the position in two measurement planes of the z axle of cable 4.These points define the axis as the insulative cylinders body of space line.By measuring the position of inner conductor 3 in the 3rd plane (the 3rd plane does not overlap with two described optical flats), can determine how far conductor 3 has from the space line of previous foundation.Conductor 3 has determined degree of eccentricity from the distance that previously defined straight line departs from.
In practice, the spatial order of measurement is unimportant, as long as along the z axle at least three measurement point p1, p2 and p3 are arranged, the mixing of optics and Magnetic Measurement mode is arranged, and they is getting final product of adopting simultaneously for this purpose.Like this, Magnetic Measurement plane 11 and 12 can be positioned at the both sides or a side on optical measurement plane 13, or under the situation of using two optical measurement planes, these optical measurement planes can be positioned at the both sides or a side on Magnetic Measurement plane.Measure inner conductor 3 and measure in single the 3rd plane under the situation of outer sleeve 9 in two planes, the order of measurement plane can have multiple.
The design that the present invention sets up is: use the three-dimensional of the z axis of cable 4 to be defined as the space line that limits into by two measurement points, and detect the distance that the 3rd measurement point arrives this straight line, determine it from the distance of this straight line as degree of eccentricity.In addition, the design that the present invention determines is, conductor central axis z is described as a space line from the mathematics angle, and this straight line is limited by the position of two Magnetic Measurement point p1 and p2 (for example being the point of crossing of conductor 3 and two horizontal survey planes 11 and 12).This straight line is extrapolated from mathematics, pass the some p 3 on the 3rd parallel optical measurement plane 13, wherein, four points 10 on the periphery that is in insulating sheath or sleeve pipe 9 are being arranged on the optical measurement plane 13 measured to predict it.Distance between the point of extrapolation and the geometric center of four optical measurement points has determined degree of eccentricity.
For simplicity, the 3rd preferred arrangements is only described; Promptly two Magnetic Measurement equipment are positioned on the side of optical flat.This is shown in Figure 1A.The description of other three kinds of layouts is similar.
According to this layout, in order to measure degree of eccentricity, equipment at first must be set up the space line z that the center limited by conductor 3, and how far the center of measuring the periphery of outer sleeve 9 then has from the straight line of being set up.
In order to set up first spatial point, this device 100 can adopt be arranged in the vertical substantially plane 11 of the z axle of cable 3 in one group of four magnetic field sensor 5 and 6.The induction alternating current is to set up resonance magnetic field in conductor 4.
Such magnetic field increases along with the distance with the axis z of conductor and reduces, thereby allows sensor 5 and 6 to measure the position of conductors 3.Preferably, sensor 5 and 6 is arranged in couples on the relative both sides of cable 4 in the plane 11, thereby, determines the nominal straight line indication of the position of conductor in specific plane 11 by a signal is deducted another signal.Like this, these two pairs of sensors 5 and 6 are arranged so that in plane 11 can set up x and y position, and the z axle then is the axis of cable 4.Cable 4 roughly is positioned at the center on plane 11 and from four sensors 5 and 6 roughly equidistant.Sensor 5 and 6 can be a sensing coil (being sometimes referred to as detecting coil), maybe can be the chip upper sensor (sensor on chip) of any kind of (magenetorestrictive) that is called magnetoresistance, magnetostrictive (magnetostrictive) or hall device.In order to form the magnetic field of measuring for these sensors, excite cable 4 with alternating current by means of certain external current source (not shown) preferably from the sensing apparatus of a distance of the present invention.
Intensity by measuring two x sensors 5 also deducts another amplitude from an amplitude, conductor can be summed up as a numerical value at the position measurements of x axle dimension.Similarly, use two y sensors 6 to determine the y position.X and y coordinate so just on Magnetic Measurement plane 11, have been set up.
In order to set up second point, the magnetic sensor 5 and 6 of identical set is positioned at along the z axle away from first group of sensor 5 and 6 one than short distance, and is arranged in the plane 12 that is basically parallel to first plane 11.Identical with the metering system of front, the position at its center when x and y component have determined that conductor 3 passes this second plane 12.Define the center of the conductor 3 in this device uniquely along these two groups of x-y components of the spaced apart certain distance of cable axis z.
Like this, two unique some P1 and P2 in two parallel planes 11 and 12, have been determined, this just sets up a unique space line L, and this space line L will be unique but the 3rd measurement plane 13 that is basically parallel to preceding two planes 11 and 12 is passed at unmeasured some P 3 places, as shown in Figure 2.By extrapolation, can predict the position of this P3 in the 3rd plane 13.The 3rd measurement plane 13 is equipped with optical measuring apparatus shown in Figure 37 and 8.What for example, the optical measuring apparatus in the plane 13 can be in two types is a kind of.These equipment are known by the people in industry, are known as " photograph meter (camera gauge) " and " scanner ".They are generally used for measuring the diameter of cable or wire, but also can be set to the measuring position.These two types all have the projected light beam projection to object under test, and measure the size of shade with the typical sub-micron class precision.When such equipment configuration has two to intersect light beams, x and y position that they can Measuring Object.
The position of four points 10 on the circular periphery basically of optical device 7 and 8 definite insulating material or sleeve pipe 9.The geometrical mean of four points 10 is the unique points 14 in the 3rd measurement plane 13.In Fig. 3, the optics in the 3rd measurement plane 13 determines that the distance between point 14 and the extrapolation point P3 is exactly a degree of eccentricity.This is exactly the center of this conductor relevant with the insulator center basically.
The position of three measurement planes can be relative to each other, and predicts the coordinate figure of the point in the 3rd plane 13 to help every pair of point in preceding two measurement planes 11 and 12.Bare wire or not insulated metallic filaments be to be close to perfect concentric cable, nominally because its insulation course is zero.If tinsel can reach the straight degree of making, these three planes just can be associated by means of measuring the x-y position of bare wire in each of three planes.Non-linear for correcting measuring equipment, the data of collecting a plurality of positions of cable 4 and angle are just enough.Collected data comprise the x-y position of bare wire in three planes 11,12 and 13.Can carry out least square fitting in view of the above and form equation, this equation can be mapped to the 3rd point the plane from every pair of point on two planes of beginning.Computer based equipment 50 is operably connected to sensor 5,6,7 and 8, and is equipped with the software that is used to carry out calculating operation described herein.Sensor can be surveyed absolute amplitude or angle as used herein, to determine the position.
Be used for determining the degree of eccentricity of cable or wire and the more dynamic method and the measurement mechanism of diameter by these products being provided, the invention provides.In addition, when measuring cable or wire, the invention provides the environment of easier work, maintenance and repair.
Claims (12)
1. one kind is used to measure substantially the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter, and described device comprises:
At least three discrete measuring equipments, described at least three discrete measuring equipments are spaced apart in the axial direction along described z axle, make each equipment can obtain the object measured value in the different measuring plane at z axle predetermined point place in order to storage, wherein, each plane is directed at a predetermined angle with respect to the z axle, and each described equipment configuration is for obtaining the object measured value at given predetermined instant and actual x-y coordinate place in order to storage; With
Computer based equipment, described computer based equipment is operably connected to described measuring equipment, described computer based equipment has software service to receive and to store described three groups of actual measurement coordinate figures, adopt two groups of described actual coordinate values to estimate coordinate figure, and calculate degree of eccentricity by means of the difference of calculating between the 3rd group of expectation coordinate figure and actual the 3rd group of coordinate figure to derive the 3rd group.
2. the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter of being used to measure substantially according to claim 1, it is characterized in that, described object is the cable that comprises insulating sleeve and inner wire, the first described equipment can be measured diameter wiry, the second described equipment can be measured the diameter of sleeve pipe, and the 3rd described equipment can be measured one of wire diameter and casing diameter.
3. the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter of being used to measure substantially according to claim 1 is characterized in that at least one described equipment comprises optical measuring apparatus, and one of described equipment comprises Magnetic Measurement equipment.
4. the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter of being used to measure substantially according to claim 3, it is characterized in that, comprise two optical devices further, described two optical devices form the plane on the both sides of the described magnetic apparatus that forms the magnetic plane.
5. the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter of being used to measure substantially according to claim 3, it is characterized in that, comprise two optical devices further, described two optical devices form the plane on a side of the described magnetic apparatus that forms the magnetic plane.
6. the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter of being used to measure substantially according to claim 3, it is characterized in that, comprise two magnetic apparatus further, described two magnetic apparatus form the plane on a side of the described optical device that forms optical flat.
7. the degree of eccentricity of the elongated object that moves along the z axle and the device of diameter of being used to measure substantially according to claim 3, it is characterized in that, comprise two magnetic apparatus further, described two magnetic apparatus form the plane on the both sides of the described optical device that forms optical flat.
8. one kind is used to measure substantially the degree of eccentricity of the elongated object that moves along the z axle and the method for diameter, and described method comprises step:
(a) adopt along isolated in the axial direction at least three the discrete measuring equipments of z axle, make each equipment can obtain the object measured value in the different measuring plane at z axle predetermined point place, wherein each plane is directed at a predetermined angle with respect to the z axle;
(b) when movement of objects, obtain measured value with each equipment, obtain three groups of x-y coordinate figures in object zone to be measured thus at given predetermined instant; With
(c) use described three groups of coordinate figures to determine the degree of eccentricity of object.
9. method according to claim 8 is characterized in that, described object is a cable.
10. method according to claim 8 is characterized in that, also comprises adopting computer based equipment execution in step (c).
11. method according to claim 8, wherein step (a) is characterised in that and makes described discrete measuring equipment be provided as the described measured value of acquisition in order to storage, and feature is that also the computer based equipment that step (c) comprises that employing has software thereon handles described coordinate figure to determine degree of eccentricity.
12. a method that is used for the position of calculating conductor in insulating sheath, described method comprises step:
(a) adopt at least three measurement planes, wherein the first group coordinate figure of the position of inner conductor with first plane of deriving can be measured at least one plane, the second group coordinate figure of the position of external jacket with second plane of deriving can be measured at least one plane, and one of the position of external jacket and position of inner conductor can be measured with the 3rd group of coordinate figure in the 3rd plane of deriving in all the other planes; With
(b) use derive expectation set of coordinates in described the 3rd plane in the described plane of described first group of coordinate figure and described second group of coordinate figure, and with described expectation set of coordinates and described the 3rd group of coordinate figure relatively with definite degree of eccentricity and the position of described conductor in described sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810161966A CN101713634A (en) | 2008-10-06 | 2008-10-06 | Eccentricity gauge for wires and cables and method for measuring concentricity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810161966A CN101713634A (en) | 2008-10-06 | 2008-10-06 | Eccentricity gauge for wires and cables and method for measuring concentricity |
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| CN101713634A true CN101713634A (en) | 2010-05-26 |
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| CN200810161966A Pending CN101713634A (en) | 2008-10-06 | 2008-10-06 | Eccentricity gauge for wires and cables and method for measuring concentricity |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292665A (en) * | 2013-06-24 | 2013-09-11 | 国家电网公司 | Method and corresponding device for measuring cable insulation thickness and eccentricity |
| CN106091919A (en) * | 2016-06-08 | 2016-11-09 | 爱德森（厦门）电子有限公司 | A kind of plain conductor material degree of eccentricity device for fast detecting and method |
| CN108700407A (en) * | 2016-02-16 | 2018-10-23 | 瑞得力特克纳股份公司 | Equipment for measuring hawser parameter |
| CN110715635A (en) * | 2018-07-11 | 2020-01-21 | 富鼎电子科技(嘉善)有限公司 | Coaxiality detection device |
| CN111076657A (en) * | 2019-12-17 | 2020-04-28 | 安徽复兴电缆集团有限公司 | Cable eccentricity detection device |
| CN111536884A (en) * | 2020-03-24 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Wire coating thickness measuring device and control method thereof |
| WO2021000771A1 (en) * | 2019-07-02 | 2021-01-07 | 李宏达 | Contactless measurement method for offset of current-carrying conductor relative to geometric center of cable core |
| CN114543657A (en) * | 2022-02-24 | 2022-05-27 | 博腾电子产品(成都)有限公司 | Wire eccentricity detection device and detection method |
-
2008
- 2008-10-06 CN CN200810161966A patent/CN101713634A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292665A (en) * | 2013-06-24 | 2013-09-11 | 国家电网公司 | Method and corresponding device for measuring cable insulation thickness and eccentricity |
| CN103292665B (en) * | 2013-06-24 | 2015-09-30 | 国家电网公司 | A kind ofly measure the method for cable insulation thickness and degree of eccentricity and corresponding measurement mechanism |
| CN108700407A (en) * | 2016-02-16 | 2018-10-23 | 瑞得力特克纳股份公司 | Equipment for measuring hawser parameter |
| CN108700407B (en) * | 2016-02-16 | 2020-11-03 | 瑞得力特克纳股份公司 | Device for measuring parameters of a cable |
| CN106091919A (en) * | 2016-06-08 | 2016-11-09 | 爱德森（厦门）电子有限公司 | A kind of plain conductor material degree of eccentricity device for fast detecting and method |
| CN110715635A (en) * | 2018-07-11 | 2020-01-21 | 富鼎电子科技(嘉善)有限公司 | Coaxiality detection device |
| CN113811739B (en) * | 2019-07-02 | 2024-04-19 | 沈阳阿维澳尔测控科技有限公司 | Method for non-contact measurement of geometrical center offset of current-carrying wire relative to cable core |
| CN113811739A (en) * | 2019-07-02 | 2021-12-17 | 沈阳阿维澳尔测控科技有限公司 | Method for non-contact measurement of current-carrying wire deviation relative to cable core geometric center |
| WO2021000771A1 (en) * | 2019-07-02 | 2021-01-07 | 李宏达 | Contactless measurement method for offset of current-carrying conductor relative to geometric center of cable core |
| CN111076657B (en) * | 2019-12-17 | 2021-06-08 | 安徽复兴电缆集团有限公司 | Cable eccentricity detection device |
| CN111076657A (en) * | 2019-12-17 | 2020-04-28 | 安徽复兴电缆集团有限公司 | Cable eccentricity detection device |
| CN111536884A (en) * | 2020-03-24 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Wire coating thickness measuring device and control method thereof |
| CN114543657A (en) * | 2022-02-24 | 2022-05-27 | 博腾电子产品(成都)有限公司 | Wire eccentricity detection device and detection method |
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Open date: 20100526 |