KR101687715B1 - 2-axis surface curvature and profile measurement device - Google Patents

2-axis surface curvature and profile measurement device Download PDF

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Publication number
KR101687715B1
KR101687715B1 KR1020150133354A KR20150133354A KR101687715B1 KR 101687715 B1 KR101687715 B1 KR 101687715B1 KR 1020150133354 A KR1020150133354 A KR 1020150133354A KR 20150133354 A KR20150133354 A KR 20150133354A KR 101687715 B1 KR101687715 B1 KR 101687715B1
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KR
South Korea
Prior art keywords
frame
curvature
distance
biaxial
nozzle
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KR1020150133354A
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Korean (ko)
Inventor
김희중
고지훈
신성범
김영준
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국방과학연구소
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/255—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring radius of curvature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications

Abstract

The present invention provides a biaxial curvature measuring device which includes: a first frame extended in one direction to be able to be placed in a first measurement direction of a measurement surface of which curvature is measured; first and second support units installed at both ends of the first frame respectively, and protruding in a direction to the measurement surface in order to support the first frame while touching the measurement surface; a first distance sensor installed in the first frame, and installed between the first and second support units to measure a distance from the first frame to the measurement surface; a second frame crossing with the first frame in a position, in which the first distance sensor is installed, and extended in both directions from the first frame; and second and third distance sensors installed at both ends of the second frame respectively, and measuring a distance from the second frame to the measurement surface. Therefore, the present invention is capable of profiling the entire shape of a nozzle based on measured curvature data.

Description

2-AXIS SURFACE CURVATURE AND PROFILE MEASUREMENT DEVICE}

The present invention relates to a curvature measuring apparatus capable of measuring the curvature of a nozzle surface (nozzle plate).

BACKGROUND ART [0002] Various kinds of nozzles have been utilized in studying fluid flow in a conventional wind tunnel apparatus or the like. Among the various types of nozzles, the most widely used nozzle is a square nozzle.

In order to increase the reliability of data to be measured through the wind tunnel device, it is important that the flow of the fluid passing through the nozzle is uniform. To this end, it is necessary to control the curvature and the profile .

Conventionally, in order to measure the curvature of the nozzle plate, a uniaxial curvature measuring apparatus capable of measuring the curvature only in an arbitrary uniaxial direction (one direction) has been used.

However, when the curvature to be measured is not a one-directional curvature but a curvature in two directions, the uniaxial curvature measuring device must be set separately for each measurement direction. This was a very cumbersome task to measure curvature, and human errors were involved in this process.

For example, the nozzle plate of the square nozzle is formed so as to have different curvatures in the biaxial direction as an example of measuring the curvature of the square nozzle most widely used in the related art. Thus, the nozzle has its own profile.

Since the nozzle plate of the rectangular nozzle is formed of a flexible material, unintended biaxial (e.g., X-axis or Y-axis) deformation may occur when the wind tunnel apparatus is tested. Therefore, when the square nozzle is used, it is necessary to measure and manage both the curvatures in the two-axis (X-axis and Y-axis) directions.

Particularly, during the operation of the wind tunnel device, the curvature and the profile of the nozzle plate may be changed due to the pressure of the fluid, so that the curvature and profile of the nozzle plate are constantly maintained until the wind tunnel is stopped It is necessary to measure and manage.

The present invention seeks to simultaneously measure the biaxial curvature of each nozzle plate in a rectangular nozzle having a continuously changing or constant curvature.

The present invention attempts to profile the overall shape of the nozzle based on curvature data obtained by measuring biaxial curvature.

That is, the present invention intends to finish the measurement of the biaxial curvature of the square nozzle more easily and conveniently, thereby shortening the total working time required for measuring the biaxial curvature.

The present invention proposes a biaxial curvature measuring device capable of setting a curvature measuring device in a direction exactly coinciding with a biaxial direction at a time.

According to an aspect of the present invention, there is provided a method of measuring a curvature of a measuring surface, the measuring method comprising the steps of: frame; First and second support units provided at both ends of the first frame and formed to protrude toward the measurement surface to support the first frame while being in contact with the measurement surface; A first distance sensor mounted on the first frame and provided between the first and second support units to measure a distance from the first frame to the measurement surface; A second frame intersecting the first frame at a position where the first distance sensor is provided and extending in both directions from the first frame; And second and third distance sensors respectively provided at both ends of the second frame for measuring a distance from the second frame to the measurement plane.

According to another embodiment of the present invention, at least one of the support units of the first or second support units comprises a plurality of spaced-apart support units arranged to be spaced apart from each other A biaxial curvature measurement device is provided which includes a support member.

According to another embodiment of the present invention, the first frame and the second frame are orthogonal to each other.

According to another embodiment of the present invention, when the second frame is disposed perpendicularly to the plane, the first frame may be disposed parallel to the plane, and the second frame may be disposed on both sides of the first frame, And a guide frame extending in the same length and provided in parallel to a position spaced apart from the second frame.

According to another embodiment of the present invention, the first or second supporting unit includes a height adjusting unit capable of adjusting a height from the first frame to the measuring surface. Is provided.

According to another embodiment of the present invention, a control unit electrically connected to the first distance sensor, the second distance sensor and the third distance sensor, for calculating the curvature data of the measurement surface using the measured distance data, And a biaxial curvature measuring device for measuring the biaxial curvature of the biaxial curvature measuring device.

According to another aspect of the present invention, there is provided an apparatus for measuring biaxial curvature, further comprising a display unit for displaying curvature data calculated through the control unit.

According to the present invention, in a rectangular nozzle having a continuously changing or constant curvature, the biaxial (two-directional) curvature of each nozzle face (nozzle plate) can be simultaneously measured.

According to the present invention, the entire shape of the nozzle can be profiled based on the curvature data obtained by measuring the biaxial (two-directional) curvature.

That is, according to the present invention, the measurement of the biaxial curvature and the profile (shape) of the square nozzle can be completed more easily and conveniently, and the total working time required for measuring the biaxial curvature and profile .

1 is a perspective view showing a square nozzle widely used in a wind tunnel device and a biaxial direction of the square nozzle.
2 is a perspective view illustrating a biaxial curvature measuring apparatus according to an embodiment of the present invention.
3 is a perspective view illustrating a biaxial curvature measuring apparatus according to another embodiment of the present invention.
FIG. 4 is a conceptual diagram illustrating a method of measuring a curvature using the biaxial curvature measuring apparatus shown in FIG. 2. FIG.
FIG. 5 is a conceptual diagram illustrating a method of measuring curvature or radius of curvature in general.
FIG. 6 is a conceptual diagram for explaining the step of aligning the biaxial curvature measuring device and the rectangular nozzle shown in FIG. 2 by leaning on a certain plane.

Hereinafter, the biaxial curvature measuring apparatus 100 of the present invention will be described in detail with reference to the drawings attached hereto.

It should be noted that the suffixes "unit" and " part "for the constituent elements used in the following description are to be given or mixed in consideration only of ease of specification, and they do not have their own meaning or role .

In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations, and the description thereof is replaced with the first explanation. As used herein, the singular forms " a " and " an " are to be construed as including plural referents unless the context clearly dictates otherwise.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the meaning and concept of the technical subject matter of the present invention.

In particular, the biaxial curvature measuring apparatus 100 will be described in more detail with reference to a method of measuring the curvature of the rectangular nozzle 10 using the biaxial curvature measuring apparatus 100 of the present invention.

FIG. 1 is a perspective view showing a rectangular nozzle 10 widely used in the wind tunnel apparatus and two-axis directions (X-axis and Y-axis directions) of the rectangular nozzle 10. FIG.

The X-axis direction shown in FIG. 1 indicates the longitudinal direction of the rectangular nozzle 10, and the Y-axis direction indicates the width direction perpendicular to the longitudinal direction of the rectangular nozzle 10.

The rectangular nozzle 10 has a shape in which the upper and lower nozzle plates 10a and 10b are bent so that the cross-sectional area through which the fluid passes is changed. Here, the left and right nozzle plates 10c and 10d of the rectangular nozzle 10 are configured to be flat so as not to affect the flow of the fluid. As a result, the portion where the velocity and the pressure are changed in the flow of the fluid is the upper and lower nozzle plates 10a and 10b of the square nozzle 10.

Therefore, in order to improve the reliability of the wind tunnel test data when measuring the experimental data using the rectangular nozzle 10, the curvature changes of the upper and lower nozzle plates 10a and 10b of the square nozzle 10 are continuously Is very important.

Hereinafter, it is assumed that the X-axis direction (longitudinal direction of the square nozzle 10) shown in Fig. 1 is assumed to be the first direction in which the biaxial curvature measuring apparatus 100 of the present invention is used.

Axis direction (the width direction perpendicular to the longitudinal direction of the square nozzle 10) shown in Fig. 1 is set in the second direction, which is measured using the biaxial curvature measuring apparatus 100 of the present invention .

As described above, in the case of the square nozzle 10, the curvature in the first direction has the greatest influence on the flow state of the fluid. Accordingly, the measurer periodically measures curvatures of the upper and lower nozzle plates 10a and 10b of the rectangular nozzle 10 in the first direction (X-axis direction), and based on the measured curvature data, the square nozzle 10 It is necessary to increase the reliability of measurement data by correcting the curvatures of the upper and lower nozzle plates 10a and 10b.

On the other hand, in the second direction of the square nozzle 10, the curvature is not generated by the upper and lower nozzle plates 10a and 10b being not deformed or warped, so that the flow of the fluid flowing through the cross-sectional area can be uniformly controlled , The reliability of the wind tunnel test data can be improved. However, since the nozzle plates 10a, 10b, 10c, and 10d are made of a flexible material, the nozzle plates 10a, 10b, 10c, and 10d must be deformed in an unintended direction, resulting in unintended curvature.

Therefore, the measurer needs to continuously measure not only the curvature in the first direction but also the curvature in the second direction of the nozzle plates 10a, 10b, 10c, and 10d. That is, it is necessary to periodically measure the curvature of the nozzle plates 10a, 10b, 10c, and 10d in order to check the steady state of the nozzle 10 (a state of ensuring a uniform fluid flow) And it is very important to maintain and manage the measured curvature data.

2 is a perspective view showing a biaxial curvature measuring apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 2, a biaxial curvature measuring apparatus 100 according to an embodiment of the present invention includes a first frame 110 and a second frame 120.

Hereinafter, the measurement method will be described assuming that the curvature of the upper nozzle plate 10a of the nozzle 10 shown in Fig. 1 is measured using the biaxial curvature measuring apparatus 100 shown in Fig.

The first frame 110 is formed to extend in one direction and can be disposed in a first direction (e.g., an X-axis direction) of the nozzle plate 10a to be measured for curvature.

The second frame 120 intersects the first frame 110 and extends from the first frame 110 in both directions (for example, the Y axis direction) at the intersecting points.

Also, in the case of the biaxial curvature measuring apparatus 100 according to an embodiment of the present invention, the second frame 120 may be orthogonal to the first frame 110.

First and second support units 140 and 150 are provided at both ends of the first frame 110, respectively. The first and second support units 140 and 150 are formed to protrude in the direction of the nozzle plate 10a when the first frame 110 is placed on the nozzle plate 10a, 110 on the nozzle plate 10a.

Referring to FIG. 2, the biaxial curvature measuring apparatus 100 is mounted on the nozzle plate 10a at a position where the second supporting unit 150 is to be mounted, 2 supporting members 151 and 152 are provided apart from each other.

When this structure is adopted, since the first supporting unit 140, the first supporting member and the second supporting members 151 and 152 support the biaxial curvature measuring apparatus 100 while forming a triangular support structure The biaxial curvature measuring apparatus 100 can be mounted on the nozzle plate 10a without shaking.

Referring to FIG. 2, a first distance sensor 160 is provided on an intersection of the first frame 110 and the second frame 120. The first distance sensor 160 calculates a distance between the first frame 110 and the nozzle plate 10a at the intersection and a distance between the second frame 120 and the nozzle plate 10a .

Here, the distance between the first frame 110 and the nozzle plate 10a and the distance between the second frame 120 and the nozzle plate 10a have the same value.

As the first distance sensor 160, various types of sensors may be used. For example, the first distance sensor 160 may be a non-contact distance sensor that can calculate the distance a by emitting a laser beam and measuring the time when the laser beam is reflected and reflected.

 The first distance sensor 160 may measure the distance a to the nozzle plate 10a by pressing the measuring rod directly on the nozzle plate 10a so that the measuring rod is compressed / A touch-sensitive distance sensor that can be used is also available.

In the biaxial curvature measuring apparatus 100 according to an embodiment of the present invention shown in FIG. 2, it can be seen that the first distance sensor 160 employs a noncontact distance sensor.

Second and third distance sensors 170 and 180 are provided at both ends of the second frame 120, respectively.

As the second and third distance sensors 170 and 180, various sensors as described above may be selected and applied.

In the biaxial curvature measuring apparatus 100 according to an embodiment of the present invention shown in FIG. 2, it is confirmed that the non-contact distance sensor is employed as the second and third distance sensors 170 and 180.

3 is a perspective view illustrating a biaxial curvature measuring apparatus 100 according to another embodiment of the present invention.

The biaxial curvature measuring apparatus 100 shown in FIG. 3 includes a guide frame 130 provided at one end of the first frame 110 in parallel with the second frame 120, in addition to the apparatus shown in FIG. 2 .

According to an embodiment of the present invention shown in FIG. 3, the first and second support members 151 and 152 are provided on the guide frame 130.

By adopting such a structure, the thickness of the first frame 110 can be made slimmer. As described above, the biaxial curvature measuring apparatus 100 is configured to support the nozzle plate (the biaxial curvature measuring apparatus) by the triangular support structure of the first supporting unit 140, the first supporting member and the second supporting member 151, 10a. ≪ / RTI >

FIG. 4 is a conceptual diagram illustrating a method of measuring a curvature using the biaxial curvature measuring apparatus 100 shown in FIG.

Hereinafter, a method of measuring the curvature or radius of curvature R will be described with reference to FIG.

In general, the radius of curvature (R) means the inverse of the curvature (k).

[Equation 1]

R = 1 / k

FIG. 5 is a conceptual diagram illustrating a method of measuring curvature or radius of curvature in general.

5 shows that the curvature in each direction can be calculated by measuring only the distance (height) of 3 points in each direction by the biaxial curvature measuring apparatus 100 of the present invention.

The curvature radius (R) value described above means the radius value of the circle shown in FIG.

Hereinafter, a method of measuring the first directional curvature using the biaxial curvature measuring apparatus 100 of the present invention will be described.

At both ends of the first frame 110, the first and second support units 140 and 150 are provided. When the biaxial curvature measuring apparatus 100 is mounted on the nozzle plate 10a, the first and second supporting units 140 and 150 support the first frame 110. [

At this time, the first frame 110 maintains a predetermined distance (height) from the nozzle plate 10a to the nozzle plate 10a. The distance value is a height value of the first and second supporting units 140 and 150 Respectively. Therefore, the height data of the first and second support units 140 and 150 can be directly used as the x2 and x3 data values shown in FIG.

The first distance sensor 160 is provided on the first frame 110. The first distance sensor 160 measures the distance x1 from the first frame 110 to the nozzle plate 10a. By substituting the measured distance data into the following expression, the value a shown in FIG. 4 can be obtained.

&Quot; (2) "

x2 = x3 = x1 + a

The a value obtained here corresponds 1: 1 with the curvature data of the measurement surface 500. The radius of curvature (R) can be calculated by applying the following equation based on the value a.

&Quot; (3) "

Figure 112015091938763-pat00001

4, the C value refers to a value corresponding to a straight line distance from the first or second support unit 140 or 150 to the first distance sensor 160. As shown in FIG. Since the C value is a value already known to a measurer who understands the structure of the first frame 110 of the biaxial curvature measuring apparatus 100, the C value, which the measurer already knows, is substituted into the equation (3) .

The radius of curvature (R) obtained according to these steps corresponds to a constant curvature (k) value as 1: 1 as can be seen from Equation (1).

The curvature data in the direction of the first frame 110 can be obtained in the above-described manner.

In addition, the second directional curvature data can be obtained in the same manner as described above. It should be noted that the second frame 120 is not provided with support units such as the first and second support units 140 and 150 at both ends thereof and the second and third distance sensors 170 and 180 Respectively. Therefore, when the distances (x1 to x3) at the three points shown in Fig. 4 are obtained, the x1 values are used together with the values measured by the first distance sensor 160, and the x2 and x3 distance values are Since the measured values of the second and third distance sensors 170 and 180 must be utilized, the method of measuring the curvature in the first direction is somewhat different.

The remaining steps for calculating the second direction curvature data may be performed by using equations (1) to (3) in the same manner as described above.

According to an embodiment of the present invention, the first frame 110 and the second frame 120 provided in the biaxial curvature measuring apparatus 100 may be orthogonal to each other.

According to the biaxial curvature measuring apparatus 100 employing the first frame 110 and the second frame 120 which are orthogonal to each other as described above, the rectangular nozzles 10 are moved in the first and second directions For example, the X-axis and Y-axis directions shown in Fig. 1) can be measured at the same time.

3, the biaxial curvature measuring apparatus 100 further includes the guide frame 130 in addition to the first frame 110 and the second frame 120. In addition, can do.

Referring to FIG. 3, the guide frame 130 is disposed at a position spaced apart from the second frame 120, and is parallel to the second frame 120. The guide frame 130 may extend from one end of the first frame 110 to extend in parallel with the second frame in both directions and have the same length as the second frame 120.

3, the first frame 110 includes a first frame 110 and a second frame 120 which are orthogonal to each other. The first frame 110 has one end thereof parallel to the second frame 120, There is shown a biaxial curvature measuring apparatus 100 further comprising the guide frame 130 formed to extend to the same length as the frame 120. [

FIG. 6 is a conceptual diagram for explaining a step of aligning the biaxial curvature measuring apparatus shown in FIG. 2 and the rectangular nozzle together on a certain plane.

Referring to FIG. 6, the nozzle 10 is arranged so that the right nozzle plate 10d is in contact with the wall surface 20.

The biaxial curvature measuring apparatus 100 is disposed so as to be in contact with the upper nozzle plate 10a. When the second frame 120 is vertically disposed on an arbitrary flat wall surface 20, the right side surface 120b of the second frame and the right side surface 130b of the guide frame are brought into contact with the wall surface 20 together. In the above arrangement, the first frame 110 is automatically arranged in parallel with the wall surface 20.

6, the biaxial curvature measuring apparatus 100 is configured to rapidly align the biaxial curvature of the nozzle 10 in the biaxial direction (X-axis and Y-axis direction) do.

3 and 6 illustrate an embodiment in which the guide frame 130 is formed at one end of the first frame 110. However, the position of the guide frame 130 is not limited thereto, The second frame 110 may be disposed at any position on the first frame 110 as long as it is spaced apart from the position of the second frame 120. [

However, in order to maximize the alignment effect, it is preferable that the guide frame 130 is formed at one end of the first frame 110 as shown in FIG.

According to another embodiment of the present invention, the first or second supporting unit 140 or 150 includes a height adjusting unit that can adjust a distance from the first frame 110 to the nozzle plate 10a can do.

When the biaxial curvature measuring apparatus 100 of the present invention is provided with only the fixed support unit by having the height adjusting unit, the curvature can not be measured because the curvature radius of the nozzle plate is extremely short, For example, curved surfaces of curved surfaces that are curved rapidly can be measured. That is, the curvature range of the nozzle plate, which is capable of measuring the curvature, becomes very wide.

According to another embodiment of the present invention, the control unit 190 is configured to detect all the sensors included in the biaxial curvature measuring apparatus 100, that is, according to the embodiment shown in Fig. 3, And may be electrically connected to the distance sensors 160-180.

The control unit 190 may be provided at any position on the first frame 110, the second frame 120, and the guide frame 130.

3, the control unit 190 may be provided on the first distance sensor 160 located at the intersection of the first frame 110 and the second frame 120. In this case, .

The control unit 190 collects distance (height) data measured by all the sensors described above, and calculates the curvature data according to each direction by applying Equations 1 to 3 above.

The measurer can calculate and obtain biaxial curvature data of the nozzle plate close to real time through the control unit 190. [

Also, since the control unit 190 is mounted on the biaxial curvature measuring apparatus 100 of the present invention, based on the data measured by the first to third distance sensors 160 to 180, 1 to 3) to reduce the arithmetic errors that can be caused by the human being (the measurer) when calculating the curvature data, and to minimize the time required in the curvature measuring step.

According to another embodiment of the present invention, a display unit (not shown) for displaying the curvature data calculated through the control unit 190 may be further provided, so that the measurer can directly check the curvature data value.

In this way, the measurer can quickly check the biaxial curvature data calculated in near real time. The measurer can immediately diagnose whether the nozzle plate is deformed or broken using the curvature data thus confirmed.

10: nozzle 130a: guide frame left side
10a: upper nozzle plate 130b: right side of guide frame
10b: lower nozzle plate 140: first support unit
10c: left nozzle plate 150: second support unit
10d: right nozzle plate 151: first support member
20: flat wall surface 152: second supporting member
100: biaxial curvature measuring device 160: first distance sensor
110: first frame 170: second distance sensor
120: second frame 180: third distance sensor
120a: second frame left side 190: control unit
120b: right side of the second frame R: curvature radius
130: guide frame

Claims (7)

A first frame which is formed to extend in one direction and is arranged to be placed on a first measurement direction of a measurement surface to be measured for curvature;
First and second support units provided at both ends of the first frame and protruding in a direction toward the measurement surface to support the first frame while being in contact with the measurement surface;
A first distance sensor mounted on the first frame and provided between the first and second support units to measure a distance from the first frame to the measurement surface;
A second frame intersecting the first frame at a position where the first distance sensor is provided and extending in both directions from the first frame; And
And second and third distance sensors respectively provided at both ends of the second frame for measuring a distance from the second frame to the measurement surface,
Wherein the first or second supporting unit has a height adjusting unit capable of adjusting a height from the first frame to the measuring surface. The method according to claim 1,
Wherein at least one of the first and second support units includes a plurality of support members spaced apart from each other such that the biaxial curvature measuring device can be placed on the measurement surface without being tilted. Axial curvature measuring device. 3. The method according to claim 1 or 2,
Wherein the first frame and the second frame are orthogonal to each other. The method of claim 3,
Wherein the first frame extends at the same length as the second frame at both sides of the first frame so that the first frame can be disposed parallel to the plane when the second frame is disposed perpendicular to the plane, And a guide frame provided parallel to the spaced position. delete 3. The method according to claim 1 or 2,
Further comprising a control unit electrically connected to the first distance sensor, the second distance sensor and the third distance sensor, and calculating a curvature data of the measurement surface using the measured distance data. Measuring device. The method according to claim 6,
And a display unit for displaying the curvature data calculated through the control unit.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070088042A (en) * 2006-02-24 2007-08-29 비오이 하이디스 테크놀로지 주식회사 Apparatus for measuring curvature

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070088042A (en) * 2006-02-24 2007-08-29 비오이 하이디스 테크놀로지 주식회사 Apparatus for measuring curvature

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