# US 2019/0170504 A1 · Dimension measuring device and method

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- Number: US 2019/0170504 A1
- Document ID: US20190170504A1
- Status: Published application
- Kind: A1
- Application number: 15/756,489
- Filed: 2016-05-25
- Published: 2019-06-06
- Earliest claimed: 2015-09-10
- Assignees: Posco
- Applicants: Posco
- Inventors: Choong Soo LIM; Hyeong Jun HUH; Sung Joon KWAK
- Web page: https://patentgrep.com/patent/US20190170504A1

## CPC

- G01B 11/022: {by means of tv-camera scanning}
- G01B 11/00: Measuring arrangements characterised by the use of optical techniques
- G01B 11/026: {by measuring distance between sensor and object (G01B11/0608 takes precedence)}
- G01B 11/04: specially adapted for measuring length or width of objects while moving
- G01B 11/24: for measuring contours or curvatures
- G01B 11/26: for measuring angles or tapers; for testing the alignment of axes
- G01P 3/68: using optical means, i.e. using infrared, visible, or ultraviolet light (G01P3/80 takes precedence {; by reflection of waves G01S17/58})
- G01S 17/08: for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48)
- G01V 8/10: Detecting, e.g. by using light barriers (by reflection from the object G01S17/00)
- G06T 7/50: Depth or shape recovery
- G06T 7/60: Analysis of geometric attributes
- H04N 23/66: Remote control of cameras or camera parts, e.g. by remote control devices
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The present invention relates to a dimension measuring device and a dimension measuring method, the dimension measuring device comprising: a moving unit for moving two sheets of material; a plurality of range finders installed at a preset interval along the direction of traveling of the material, so as to measure the distance from the side surfaces of the material; and an imaging device installed to take images between the first and second range finders, which are installed at the first and second locations with reference to the entry side of the material, respectively.

## Claims

### Claim 1

A dimension measuring device comprising:
a moving unit for moving two sheets of material;
a plurality of range finders installed at a preset interval along a direction of traveling of the material, while being spaced from both side surfaces of the material, so as to measure a distance from the side surfaces of the material; and
an imaging device installed to take images between first and second range finders, which are installed at first and second locations based on an entry side of the material, respectively.

### Claim 2 (depends on 1)

The dimension measuring device of claim 1, further comprising a controller for controlling the imaging device to take images of the material as the first range finder receives a signal indicating that a tail-end portion of one of the two sheets of the material passes through the first range finder and a front-end portion of the material is detected by an nth range finder installed at an nth location based on the entry side of the material.

### Claim 3 (depends on 2)

The dimension measuring device of claim 2, wherein a length of the material is obtained by the following equation:
P=(n−2)*L+L′,
where P is a length of material, L is a distance between range finders, L′ is a distance from the second range finder to a tail-end of the material, and n is the number of range finders that detect the material.

### Claim 4 (depends on 3)

The dimension measuring device of claim 3, wherein a distance from the second range finder to a tail end of the material is obtained from images taken by the imaging device.

### Claim 5 (depends on 2)

The dimension measuring device of claim 2, wherein the controller receives a signal indicating that a tail-end portion of one of the material that first enters the first range finder passes through the first range finder, controls the imaging device to take images of the material as the front-end portion of the material that first enters the nth range finder is detected by the nth range finder installed at the nth location based on the entry side of the material, and controls the imaging device to take images of the other one of the material as a front-end portion of the other one of the material is detected by the nth range finder.

### Claim 6 (depends on 1)

The dimension measuring device of claim 1, wherein perpendicularity of a front-end portion of the material is calculated from images taken by the imaging device as the second range finder detects a front-end portion of one of the material.

### Claim 7 (depends on 1)

The dimension measuring device of claim 1, wherein a camber, a width, a length and perpendicularity of each of the two sheets of the material are measured using distance information continuously measured by one among the range finders arranged along a longitudinal direction of the material and images taken by the imaging device.

### Claim 8 (depends on 1)

The dimension measuring device of claim 1, wherein the images are taken as a front-end portion of the material is detected by each of the range finders arranged at a preset interval since the first range finder based on a signal obtained by detecting the front-end portion of the material using the first range finder.

### Claim 9

A dimension measuring method comprising:
moving two sheets of material;
measuring a distance from side surfaces of the material using a plurality of range finders arranged at a preset interval along a movement direction of the material;
taking images of the material using an imaging device; and
measuring a length, a width, a camber and perpendicularity of each of the two sheets of the material using distance information measured by the plurality of range finders and images of the material taken by the imaging device.

### Claim 10 (depends on 9)

The dimension measuring method of claim 9, wherein the measuring of the length, the width, the camber and the perpendicularity of each of the two sheets of the material comprises measuring the length, the width, the camber and the perpendicularity of each of the two sheets of the material using distance information continuously measured by one among the range finders and images continuously taken by the imaging device installed to take images between a first range finder and a second range finder installed at first and second locations based on an entry side of the material, respectively.

### Claim 11 (depends on 10)

The dimension measuring method of claim 10, wherein the images are taken as a front-end portion of the material is detected by each of the range finders arranged at a preset interval since the first range finder based on a signal obtained by detecting the front-end portion of the material using the first range finder.