Apparatus for detecting relative positioning information between rolls, and method for measurement roll alignment state by using same

Abstract

The present invention relates to an apparatus for detecting relative positioning information between rolls, and a method for measuring a roll alignment state by using same, and to an apparatus for detecting relative positioning information between rolls, and a method for measuring a roll alignment state by using same, the apparatus outputting a measurement result in real time so that a measurer can easily recognize the degree of parallelism and the degree of horizontality of a roll when a roll process line is formed, and thus an inter-roll alignment state can be checked or a measurement roll can be corrected according to the alignment state.

Claims

1. An apparatus for detecting relative positioning information between rolls, comprising: a subject position fix unit (100) mounted on a subject roll (SR) that is the reference of measurement and discharging a laser signal (L) to a measurement roll (MR) to be measured; a relative position measurement unit (200) mounted on the measurement roll (MR) to be measured and receiving the laser signal (L) from the subject position fix unit (100); and a detection result output unit (300) that receives information about the laser signal (L) from the relative position measurement unit (200), calculates the alignment state of the measurement roll (MR) with respect to the subject roll (SR), and outputs the alignment state to a display (D), wherein the relative position measurement unit (200) includes: a first laser receiver (210) that receives a first laser signal (L1) from the subject position fix unit (100); a second laser receiver (220) that receives a second laser signal (L2) from the subject position fix unit (100); and a third laser receiver (230) that reflects and receives the first laser signal (L1) discharged from the subject position fix unit (100), wherein the third laser receiver (230) includes: a received-laser signal reflection module (231) that passes and reflects the first laser signal (L1) discharged from the subject position fix unit (100) such that the passed first laser signal (L1) is radiated to the first laser receiver (210) and the reflected laser signal (L3) generated by reflection is radiated to a reflected-laser signal reception module (232); the reflected-laser signal reception module (232) to which the reflected laser signal (L3) is radiated; and a reflected-laser signal sensor module (233) that stores the reflected laser signal (L3) radiated to the reflected-laser signal reception module (232) into data, and wherein the alignment state of the measurement roll (MR) with respect to the subject roll (SR) is output to the display (D) in real time on the basis of data transmitted from the relative position measurement unit (200).

2. A method for measuring alignment state of a roll using an apparatus for detecting relative positioning information between rolls, the method comprising: a subject position fix unit mounting step (S100) of mounting a subject position fix unit (100) on a subject roll (SR) that is the reference for measurement; a relative position measurement unit mounting step (S200) of mounting a relative position measurement unit (200) on a measurement roll (MR) of which alignment is measured; a laser signal discharging step (S300) of discharging a laser signal (L) from the subject position fix unit (100); a laser signal receiving step (S400) composed of a first laser signal receiving step (S410) of receiving a first laser signal (L1), a second laser signal receiving step (S420) of receiving a second laser signal (L2), and a third laser signal receiving step (S430) of receiving a reflected laser signal (L3) from the discharge laser signal, the first, second, and reflected laser signals being radiated from the relative position measurement unit (200); a laser signal information detecting step (S500) of making the received laser signal (L) into data; a laser signal data transmitting step (S600) of transmitting the data of the laser signal (L) to the detection result output unit (300); a measurement roll alignment state calculating step (S700) of calculating alignment state of the measurement roll (MR); a measurement result output step (S800) of outputting in real time the alignment state of the measurement roll (MR) to a display (D); and a measurement roll aligning step (S900) of aligning the measurement roll (MR), wherein the first laser signal receiving step (S410) receives first laser signal (L1) that has passed through the received-laser signal reflection module (231), wherein the third laser signal receiving step (S430) includes: a reflected-laser signal generating step (S431) of generating the reflected laser signal (L3) from the first laser signal (L1) by means of the received-laser signal reflection module (231); and a reflected-laser signal receiving step (S432) of receiving the reflected laser signal (L3), whereby when a process line including several rolls continuously installed is formed, the alignment state of the rolls, that is, the degree of parallelism and the degree of horizontality of the measurement roll (MR) based on the subject roll (SR) are measured to align the measurement roll (MR) on the basis of the measurement result, so a process line with excellent alignment state of rolls is achieved.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

(2) FIG. 1 is a diagram showing the configuration of an apparatus for detecting relative positioning information between rolls of the present invention;

(3) FIG. 2 is a diagram showing the concept of the apparatus for detecting relative positioning information between rolls of the present invention;

(4) FIG. 3 is a perspective view of the apparatus for detecting relative positioning information between rolls of the present invention;

(5) FIG. 4 is a view showing an example where the apparatus for detecting relative positioning information between rolls of the present invention is applied to a site;

(6) FIG. 5 is a plan view showing an example of measurement by the apparatus for detecting relative positioning information between rolls of the present invention;

(7) FIG. 6 is a block diagram showing a method for measuring roll alignment state using an apparatus for detecting relative positioning information between rolls;

(8) FIG. 7 is a schematic diagram showing the difference on the technical characteristics between an apparatus for detecting relative positioning information between rolls of the present invention and the prior arts; and

(9) FIG. 8 shows a representative diagram of the prior art for an apparatus for detecting relative positioning information between rolls and a method for measurement roll alignment state by using the apparatus according to the present invention.

REFERENCE SIGNS LIST

(10) 1: apparatus for detecting relative positioning information between rolls 2: method for measuring roll alignment state using apparatus for detecting relative positioning information between rolls 100: subject position fix unit 110: laser transmitter 200: relative position measurement unit 210: first laser receiver 211: first laser signal reception module 212: first laser signal sensor module 220: second laser receiver 221: second laser signal reception module 222: second laser signal sensor module 230: third laser receiver 231: received-laser signal reflection module 232: reflected-laser signal reception module 233: reflected-laser signal sensor module 240: relative position detection controller 241: laser signal storage module 242: detection information transmission module 300: detection result output unit 310: detection information receiver 320: detection information calculator 321: degree of parallelism calculator 322: degree of horizontality calculator 330: detection result outputter S100: subject position fix unit mounting step S200: relative position measurement unit mounting step S300: laser signal discharging step S400: laser signal receiving step S410: first laser signal receiving step S420: second laser signal receiving step S430: third laser signal receiving step S431: reflected-laser signal generating step S432: reflected-laser signal receiving step S500: laser signal information detecting step S600: laser signal data transmitting step S700: measurement roll alignment state calculating step S800: measurement result output step S810: first laser signal output step S811: first reference registering step S812: first alignment state coordinate calculating step S813: first measurement correction value storing step S820: second laser signal output step S821: second reference registering step S822: second alignment state coordinate calculating step S823: second measurement correction value storing step S830: third laser signal output step S831: third reference registering step S832: third alignment state coordinate calculating step S833: third measurement correction value storing step S900: measurement roll aligning step A: distance between the received-laser signal reflection module (231) and the first laser signal reception module (211) B: distance between the received-laser signal reflection module (231) and the reflected-laser signal reception module (232) D: display L: laser signal MR: measurement roll SR: subject roll L1: a first laser signal L2: second laser signal L3: reflected laser signal

BEST MODE

Mode for Invention

(11) Hereafter, the functions, configuration, and operations of an apparatus for detecting relative positioning information between rolls and a method for measuring roll alignment state using the apparatus of the present disclosure are described with reference to the accompanying drawings.

(12) FIG. 1 is a diagram showing the configuration of an apparatus for detecting relative positioning information between rolls of the present disclosure, FIG. 2 is a diagram showing the concept of the apparatus for detecting relative positioning information between rolls of the present disclosure, FIG. 3 is a perspective view of the apparatus for detecting relative positioning information between rolls of the present disclosure, FIG. 4 is a view showing an example where the apparatus for detecting relative positioning information between rolls of the present disclosure is applied to a site, and FIG. 5 is a plan view showing an example of measurement by the apparatus for detecting relative positioning information between rolls of the present disclosure.

(13) An apparatus for detecting relative positioning information between rolls of the present disclosure, as shown in FIGS. 1 to 5, includes: a subject position fix unit (100) mounted on a subject roll (SR), that is the reference of measurement, and discharging a laser signal (L) to a measurement roll (MR) to be measured; a relative position measurement unit (200) mounted on the measurement roll (MR) to be measured and receiving the laser signal (L) from the subject position fix unit (100); and a detection result output unit (300) that receives information about the laser signal (L) from the relative position measurement unit (200), calculates the alignment of the measurement roll (MR) with respect to the subject roll (SR), and outputs the alignment to a display (D).

(14) The relative position measurement unit (200) includes:

(15) a first laser receiver (210) that receives a first laser signal (L1) from the subject position fix unit (100);

(16) a second laser receiver (220) that receives a second laser signal (L2) from the subject position fix unit (100); and

(17) a third laser receiver (230) that reflects and receives the first laser signal (L1) from the subject position fix unit (100).

(18) The third laser receiver (230) includes:

(19) a received-laser signal reflection module (231) that passes and reflects the first laser signal (L1) from the subject position fix unit (100) such that the passed first laser signal (L1) is radiated to the first laser receiver (210) and the reflected laser signal (L3) generated by reflection is radiated to a reflected-laser signal reception module (232);

(20) the reflected-laser signal reception module (232) to which the reflected laser signal (L3) is radiated; and

(21) a reflected-laser signal sensor module (233) that stores the reflected laser signal (L3) radiated to the reflected-laser signal reception module (232) into data.

(22) The alignment state of the measurement roll (MR) with respect to the subject roll (SR) is output to the display (D) in real time on the basis of data transmitted from the relative position measurement unit (200).

(23) That is, the present disclosure provides a detection apparatus in which the subject position fix unit (100) is mounted on the subject roll (SR) to be reference of measurement in a roll process line of which the alignment state is examined or checked, the relative position measurement unit (200) is mounted on the measurement roll (MR) that is the target of measurement, the alignment of a roll is checked by the detection result output unit (300) analyzing information created by transmission/reception of a laser signal (L) between the subject position fix unit (100) and the relative position measurement unit (200) such that a measurer can easily align the measurement roll (MR) on the basis of the alignment.

(24) In more detail, the subject position fix unit (100) of the apparatus (1) for detecting relative positioning information between rolls includes a laser transmitter (110) that discharges a first laser signal (L1) and a second laser signal (L2) that is always parallel with the first laser signal (L1), spaced a predetermined distance apart from the first laser signal (L1), and positioned on the same plane as the first laser signal (L1), and radiates two laser signals to the relative position measurement unit (200).

(25) The relative position measurement unit (200) includes:

(26) a first laser receiver (210) that receives a first laser signal (L1) from the subject position fix unit (100);

(27) a second laser receiver (220) that receives a second laser signal (L2) from the subject position unit (100);

(28) a third laser receiver (230) that reflects and receives the first laser signal (L1) from the subject position unit (100); and

(29) a relative position detection controller (240) that combines and stores information of the first laser signal (L1), the second laser signal (L2), and the reflected laser signal (L3) received to the first laser receiver (210), the second laser receiver (220), and the third laser receiver (230).

(30) The first laser receiver (210) includes:

(31) a first laser signal reception module (211) to which the first laser signal (L1) discharged from the subject position fix unit (100) is radiated; and

(32) a first laser signal sensor module (212) that stores the first laser signal (L1) radiated to the first laser signal reception module (211) into data.

(33) The second laser receiver (220) includes:

(34) a second laser signal reception module (221) to which the second laser signal (L2) discharged from the subject position fix unit (100) is radiated; and

(35) a second laser signal sensor module (222) that stores the second laser signal (L2) radiated to the second laser signal reception module (222) into data.

(36) The third laser receiver (230) includes:

(37) a received-laser signal reflection module (231) that passes and reflects the first laser signal (L1) discharged from the subject position fix unit (100) such that the passed first laser signal (L1) is radiated to the first laser receiver (210) and the reflected laser signal (L3) generated by reflection is radiated to a reflected-laser signal reception module (232);

(38) the reflected-laser signal reception module (232) to which the reflected laser signal (L3) generated from the first laser signal (L1) by the received-laser signal reflection module (231) is radiated; and

(39) a reflected-laser signal sensor module (233) that stores the reflected laser signal (L3) radiated to the reflected-laser signal reception module (232) into data.

(40) The relative position detection controller (240) includes:

(41) a laser signal storage module (241) that combines and stores data of the first laser signal (L1), the second laser signal (L2), and the reflected laser signal (L3) stored in the first laser signal sensor module (212), the second laser signal sensor module (222), and the third laser signal sensor module (233); and

(42) a detection information transmission module (242) that transmits the information combined and stored in the laser signal storage module (241) to the detection result output unit (300).

(43) The relative position detection controller (240) receives, reflects, and makes two laser signals (L) from the subject position fix unit (100) into data.

(44) The detection result output unit (300) includes:

(45) a detection information receiver (310) that receives data from the relative position measurement unit (200);

(46) a detection information calculator (320) that calculates the alignment state of the measurement roll (MR) using a trigonometric ratio on the basis of the data received by the detection information receiver (310); and

(47) a detection result outputter (330) that graphs and outputs the result about the alignment state of the measurement roll (MR) calculated from the detection information calculator (320) to the display (D) such that a measurer can check in real time the alignment state of the measurement roll (MR) with respect to the subject roll (SR) through the display (D) and to examine or correct the alignment state of the measurement roll (MR) on the basis of the checked result.

(48) The received-laser signal reflection module (231), as described above, passes and reflects the first laser signal (L1) discharged from the subject position fix unit (100) using a splitter or a mirror such that the passed first laser signal (L1) is radiated to the first laser signal reception module (211) and the reflected first laser signal (L1) is radiated to the reflected-laser signal reception module (232) as the reflected laser signal (L3).

(49) The first laser signal (L1), the second laser signal (L2), and the reflected laser signal (L3) radiated to the first laser signal reception module (211), the second laser signal reception module (221), and the reflected-laser signal reception module (232) are made into data by the first laser signal sensor module (212), the second laser signal sensor module (222), and the reflected-laser signal sensor module (233), combined and stored in the laser signal storage module (241), and transmitted to the detection result output unit (300) through the detection signal transmission module (242), whereby the alignment state of the roll is output to the display (D) in real time on the basis of the data analyzed by the detection result output unit (300).

(50) The detection information calculator (320) of the detection result output unit (300) detects and measures alignment state using a trigonometric ratio on the basis of the data received from the relative position measurement unit (200) through the detection information receiver (310) and the relationship between the first laser signal (L1) and the received-laser signal reflection module (231) receiving the first laser signal (L1) (the identity of the incident angle and the reflective angle received to and discharged from the splitter or the mirror).

(51) That is, the detection result calculator (320) includes:

(52) a degree of parallelism calculator (321) that calculates degrees of parallelism the subject roll (SR) and the measurement roll (MR) on the basis of the data acquired through the first laser receiver (210) and the third laser receiver (230); and

(53) a degree of horizontality calculator (322) that calculates degrees of horizontality of the subject roll (SR) and the measurement roll (MR) on the basis of the data acquired through the first laser receiver (210) and the second laser receiver (220).

(54) The degree of parallelism calculator (321) and the degree of horizontality calculator (322) measure the degree of parallelism and the degree of horizontality between the subject roll (SR) and the measurement roll (MR), respectively, using a trigonometric ratio.

(55) In particular, in the relative position measurement unit (200), a value to be naturally measured by the received-laser signal reflection module (231) is processed one time for the first laser signal (L1) discharged from the subject position fix unit (100). Accordingly, the alignment state of the roll is minutely output to the detection result output unit (300) about whether it is a simple parallel movement measurement value or whether the alignment state is poor even by a sensor having predetermined (normal) resolution without the resolution of the sensor being influenced by the distance between rolls and the lengths of the rolls.

(56) That is, according to detection apparatuses of the related art, even though a subject roll (SR) and a measurement roll (MR) are parallel, for example, even if the measurement roll (MR) has been simply moved parallel with respect to the subject roll (SR), a non-parallel state may be output in the measurement value, so it is difficult for a measurer to check and align the rolls.

(57) However, according to the present disclosure, as described above, since the first laser signal (L1) is radiated to the first laser signal reception module (211) and the reflected-laser signal reception module (232) through the received-laser signal reflection module (231), it is possible to immediately know whether the measurement roll (MR) has been simply moved parallel with respect to the subject roll (SR) or whether the degrees of parallelism are different. Further, it is possible to immediately know that the difference of the degrees of parallelism means whether the measurement roll (MR) is close to or far from the subject roll (SR).

(58) This is described with the related art with reference to FIG. 7.

(59) For example, FIG. 7A shows the case in which the first laser signal (L1) is received at a detector (D1) (laser signal reception module) in the related art.

(60) For example, assuming that the length (R) of a measurement roll (MR) is 1000 mm and a deviation of the degree of parallelism of the measurement roll (MR) is measured up to 0.01 mm, the resolution of the detector (D1) (laser signal reception module) is as follows:
S=0.01 [mm]
R=1000 [mm], so
a[deg]=tan−1(S/R)=5.73*10.sup.−4,
cos a=(R/(R+X)), so
X [mm]=(R/cos a)−R=5.0*10.sup.−8.

(61) That is, it should be possible to resolve the degree of parallelism up to 10.sup.−8 in order to measure a deviation of the degree of parallelism up to 0.01 mm in the related art.

(62) However, according to the present disclosure shown in FIG. 7B, the resolution under the same condition as FIG. 7A is as follows:
R=1000 [mm]
a[deg]=5.73×10.sup.−4, so
X [mm]=R*tan a=1.0*10.sup.−2.

(63) That is, according to the present disclosure, it is possible to measure a deviation of the degree of parallelism up to 0.01 m as long as it is possible to resolve the parallelism up to 10.sup.−2.

(64) D1 is a detector (laser signal reception module) that is parallel with the subject roller (SR).

(65) D2 is the detector (D1) that has been moved, that is, the detector (laser signal reception module) not parallel by being deviated a predetermined angle from the subject roll (SR).

(66) Further, according to the apparatus (1) for detecting relative positioning information between rolls of the present disclosure, as shown in FIG. 7, considering the characteristic that the incident angle of the first laser signal (L1) radiated to the received-laser signal reflection module (231) and the reflective angle of the reflected laser signal (L3) reflected and discharged is identical, a relationship A<B should be satisfied in the relationship between the distance (A) between the received-laser signal reflection module (231) and the first laser signal reception module (211) and the distance (B) between the received-laser signal reflection module (231) and the reflected-laser signal reception module (232) (this should be applied to derive whether the degrees of parallelism are not identical or whether the degrees of parallelism are identical and the measurement value is due to a simple parallel movement).

(67) If A and B are equal, it is impossible to determine whether the measurement value is caused by simple parallel movement or whether degrees of parallelism is not identical.

(68) The bottoms of the subject position fix unit (100) and the relative position measurement unit (200) are formed in an inverted “V” shape with a predetermined a contained angle (θ).

(69) The contained angle (θ) of the inverted “V” shape is within the range of 140° to 160°, whereby the contact force and the fixing force on the outer surfaces of the subject roll (SR) and the measurement roll (MR) that are separately mounted can be improved.

(70) A method for measuring alignment state of a roll using the apparatus (1) for detecting relative positioning information between rolls described above is described hereafter. A method (2) for measuring alignment state of a measurement roll (MR) with respect to a subject roll (SR) using the apparatus (1) for detecting relative positioning information between rolls includes:

(71) a subject position fix unit mounting step (S100) of mounting the subject position fix unit (100) on a subject roll (SR) that is the reference for measurement;

(72) a relative position measurement unit mounting step (S200) of mounting the relative position measurement unit (200) on a measurement roll (MR) of which the alignment state is measured;

(73) a laser signal discharging step (S300) of discharging a laser signal (L) from the subject position fix unit (100);

(74) a laser signal receiving step (S400) composed of a first laser signal receiving step (S410) of receiving a first laser signal (L1), a second laser signal receiving step (S420) of receiving a second laser signal (L2), and a third laser signal receiving step (S430) of receiving a reflected laser signal (L3) from the discharge laser signal L, the first, second, and reflected laser signals being radiated from the relative position measurement unit (200);

(75) a laser signal information detecting step (S500) of making the received laser signal (L) into data;

(76) a laser signal data transmitting step (S600) of transmitting the data of the laser signal (L) to the detection result output unit (300);

(77) a measurement roll alignment state calculating step (S700) of calculating alignment state of the measurement roll (MR);

(78) a measurement result output step (S800) of outputting in real time the alignment state of the measurement roll (MR) to the display (D); and

(79) a measurement roll aligning step (S900) of aligning the measurement roll (MR).

(80) The first laser signal receiving step (S410) receives the first laser signal (L1) that has passed through the received-laser signal reflection module (231).

(81) The third laser signal receiving step (S430) includes:

(82) a reflected-laser signal generating step (S431) of generating the reflected laser signal (L3) from the first laser signal (L1) by means of the received-laser signal reflection module (231); and

(83) a reflected-laser signal receiving step (S432) of receiving the reflected laser signal (L3).

(84) When a process line including several rolls continuously installed is formed, the alignment state of the rolls, that is, the degree parallelism and the degree of horizontality of the measurement roll (MR) based on the subject roll (SR) are measured to align the measurement roll (MR) on the basis of the measurement result, whereby a process line with excellent alignment state of rolls is achieved.

(85) The measurement result output step (S800) includes:

(86) a first laser signal output step (S810) of outputting information about the first laser signal (L1);

(87) a second laser signal output step (S820) of outputting information about the second laser signal (L2); and

(88) a third laser signal output step (S830) of outputting information about the reflected laser signal (L3).

(89) In detail, the first laser signal output step (S810) includes:

(90) a first reference registering step (S811) of registering coordinate values for the first laser signal (L1) radiated to the first laser signal reception module (211) on the basis of calibration set for the first laser signal reception module (211);

(91) a first alignment state coordinate calculating step (S812) of calculating alignment state of the measurement roll (MR) with respect to the subject roll (SR) from the coordinate values for the first laser signal (L1) registered in the first reference registering step (S811); and

(92) a first measurement correction value storing step (S813) of outputting and storing in real time measurement values and correction values for the degree of parallelism and the degree of horizontality of the measurement roll (MR) with respect to the subject roll (SR) calculated in the first alignment state coordinate calculating step (S812).

(93) The second laser signal output step (S820) includes:

(94) a second reference registering step (S821) of registering coordinate values for the second laser signal (L2) radiated to the second laser signal reception module (221) on the basis of calibration set for the second laser signal reception module (221);

(95) a second alignment state coordinate calculating step (S822) of calculating alignment state of the measurement roll (MR) with respect to the subject roll (SR) from the coordinate values for the second laser signal (L2) registered in the second reference registering step (S821); and

(96) a second measurement correction value storing step (S823) of outputting and storing in real time measurement values and correction values for the degree of parallelism and the degree of horizontality of the measurement roll (MR) with respect to the subject roll (SR) calculated in the second alignment state coordinate calculating step (S822).

(97) The third laser signal output step (S830) includes:

(98) a third reference registering step (S831) of registering coordinate values for the reflected laser signal radiated to the reflected-laser signal reception module (232) on the basis of calibration set for the reflected-laser signal reception module (232);

(99) a third alignment state coordinate calculating step (S832) of calculating alignment state of the measurement roll (MR) with respect to the subject roll (SR) from the coordinate values for the reflected laser signal (L3) registered in the third reference registering step (S831); and

(100) a third measurement correction value storing step (S833) of outputting and storing in real time measurement values and correction values for the degree of parallelism and the degree of horizontality of the measurement roll (MR) with respect to the subject roll (SR) calculated in the third alignment state coordinate calculating step (S832).

(101) A lattice-shaped coordinate target position is calculated using the data acquired by the first laser signal sensor module (211), the second laser signal sensor module (212), and the reflected-laser signal sensor module (233).

(102) Accordingly, the alignment state, that is, the degree of parallelism and the degree of horizontality of the measurement roll (MR) with respect to the subject roll (SR) are converted into coordinates, whereby it is possible to easily and intuitionally recognize the alignment state of the roll.

(103) That is, disclosed is a method of mounting the subject position fix unit (100) on a subject roll (SR) and the relative position measurement unit (200) on a measurement roll (MR), receiving three laser signals (L1, L2, and L3) by reflecting two parallel signals (L1 and L2) discharged from the subject position fix unit (100) in the relative position measurement unit (200), and outputting alignment state of the measurement roll (MR) with respect to the subject roll (SR) to the display (D) through the detection result output unit (300) regardless of the resolution of sensors so that a measurer can recognize the alignment state and correct the measurement roll on the basis of the alignment.

(104) The measurement result output step (S800), as described above, includes the first, second, and third reference registering steps (S811, S821, and S831), the first, second, and third alignment state coordinate calculating steps (S812, S822, and S832), and the first, second, and third measurement correction value storing steps (S813, S823, and S833).

(105) The first reference registering step (S811) checks data of the first laser signal (L1), radiated to the first laser signal reception module (211), generated by the first laser signal sensor module (212), and registers coordinate values of the first laser signal (L1) on the basis of predetermined calibration.

(106) The first alignment state coordinate calculating step (S812) calculates the coordinate values of the first laser signal (L1) registered in the first reference registering step (S811) such that the alignment state of the measurement roll (MR) with respect to the subject roll (SR) is displayed.

(107) The first measurement correction value storing step (S813) checks the alignment state of the measurement roll (MR) with respect to the subject roll (SR) displayed in the first alignment state coordinate calculating step (S812), and outputs and stores in real time measurement values and correction values when the measurement roll (MR) is corrected to be parallel and horizontal with respect to the subject roll (SR).

(108) Similarly, the second reference registering step (S821) checks data of the second laser signal (L2), radiated to the second laser signal reception module (221), generated by the second laser signal sensor module (222), and registers coordinate values of the second laser signal (L2) on the basis of predetermined calibration.

(109) The second alignment state coordinate calculating step (S822) calculates the coordinate values of the second laser signal (L2) registered in the second reference registering step (S821) such that the alignment state of the measurement roll (MR) with respect to the subject roll (SR) is displayed.

(110) The second measurement correction value storing step (S823) checks the alignment state of the measurement roll (MR) with respect to the subject roll (SR) displayed in the second alignment state coordinate calculating step (S822), and outputs and stores in real time measurement values and correction values when the measurement roll (MR) is corrected to be parallel and horizontal with respect to the subject roll (SR).

(111) The third reference registering step (S831) checks data for the reflected laser signal (L3), radiated to the reflected-laser signal reception module (232), generated by the reflected-laser signal sensor module (233), and registers coordinate values of the reflected laser signal (L3) on the basis of predetermined calibration.

(112) The third alignment state coordinate calculating step (S832) calculates the coordinate values of the reflected laser signal (L3) registered in the third reference registering step (S831) such that the alignment state of the measurement roll (MR) with respect to the subject roll (SR) is displayed.

(113) The third measurement correction value storing step (S833) checks the alignment state of the measurement roll (MR) with respect to the subject roll (SR) displayed in the third alignment state coordinate calculating step (S832), and outputs and stores in real time measurement values and correction values when the measurement roll (MR) is corrected to be parallel and horizontal with respect to the subject roll (SR).

(114) For reference, the apparatus 1 for detecting relative positioning information between rolls is applied to a site after the relationship of calibration (zero point) about the parallel and horizontal states of the subject position fix unit (100) and the relative position measurement unit (200) is adjusted through a precise exclusive jig.

(115) That is, the ‘predetermined calibration’ in the present disclosure may be defined as a coordinate plane having the zero point of coordinate values on the basis of resolution per pixel set by calculating the ratio of the sizes of horizontal and vertical pixels and the actual distances before measuring the alignment state of a roll in a site by, as described above, combining the subject position fix unit (100) and the relative position measurement unit (200) using a precise exclusive jig that can standardize the parallel and horizontal states of the subject position fix unit (100) and the relative position measurement unit (200).

(116) The first, second, and third reference registering steps (S811, S821, and S831), briefly, means storing coordinate values of the laser signals (L1, L2, and L3) radiated to the first and second laser signal reception modules (211 and 221) and the reflected-laser signal reception module (232) on the basis of the ‘predetermined calibration’.

(117) The first, second, and third alignment state coordinate calculating steps (S812, S822, and S832) means that the alignment state of the measurement roll (MR) from the subject roll (SR) is checked by comparing the zero point set in advance before measurement with the coordinate values of the laser signals (L1, L2, and L3) stored in the first, second, and third reference registering steps (S811, S821, and S831) by the ‘predetermined calibration’.

(118) A ‘communication network’ shown in FIG. 2 may be defined as a system including wired and wireless communication between the subject position fix unit (100) and the relative position measurement unit (200).

(119) The laser signals (L1 and L2) discharged from the subject position fix unit (100) is received and made into data by the relative position measurement unit (200) and the detection result output unit (300), whereby the alignment state of the measurement roll (MR) with respect to the subject roll (SR) is provided to a measurer in real time.

(120) The ‘alignment state’ means the degree of parallelism and the degree of horizontality degree including the relation of distance between rolls.

(121) The ‘laser signal (L)’ generally refers to a first laser signal (L1) or a second laser signal (L2) or a third laser signal, or the first laser signal (L1) and the second laser signal and the third laser signal as a whole.

(122) The detection result output unit (300) of the present disclosure may be defined as a portable electronic device having the display (D) such as a personal computer, a computer, and a tablet PC.

(123) The first laser signal sensor module (212), the second laser signal sensor module (222), and the reflected-laser signal sensor module (233) may be any one of a CDC image sensor (charge coupled device image sensor), a CMOS (complementary metal oxide semiconductor image sensor), or a position sensing detector, and can acquire the positions of the received first and second laser signals (L1 and L2) and the reflected laser signals (L3) as images.

(124) It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims.

(125) This invention can be implemented in many different forms without departing from technical aspects or main features. Therefore, the implementation examples of this invention are nothing more than simple examples in all respects and will not be interpreted restrictively.

INDUSTRIAL APPLICABILITY

(126) The present invention relates to an apparatus for detecting relative positioning information between rolls, and a method for measuring a roll alignment state by using same, and can be applied to contribute to the promotion in manufacturing and sales businesses of manufacturing the same, various industrial sites where the roll process line to which the present invention is applied should be installed, and various industrial fields, in which rolls are installed and used, such as industrial fields involved in the manufacture and production of films, thin membranes, (thin plates), paper, resins, and textiles etc.