WO2007032136A1 - 光学装置、および光学装置を用いて物体の寸法を測定する方法 - Google Patents
光学装置、および光学装置を用いて物体の寸法を測定する方法 Download PDFInfo
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- WO2007032136A1 WO2007032136A1 PCT/JP2006/312731 JP2006312731W WO2007032136A1 WO 2007032136 A1 WO2007032136 A1 WO 2007032136A1 JP 2006312731 W JP2006312731 W JP 2006312731W WO 2007032136 A1 WO2007032136 A1 WO 2007032136A1
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- Prior art keywords
- distance
- crack
- optical device
- telescope
- width
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Classifications
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0021—Measuring arrangements characterised by the use of mechanical techniques for measuring the volumetric dimension of an object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
Definitions
- the present invention relates to an optical device, and more particularly to an optical device that can be suitably used for dimension measurement of an object (for example, a crack generated on the surface of a concrete structure).
- the invention also relates to a method for measuring the dimensions of an object using such an optical device.
- the width of cracks generated on the concrete surface is measured.
- the conventional method used to measure the crack width is to measure the crack width visually by applying a normal scale or crack scale for crack width measurement to the concrete surface. Therefore, the measurement location was limited to the reach of the measurer.
- Patent Document 1 proposes a crack measuring device in which a scale or crack scale is attached to the end of an elongated rod, but the range that can be measured with this device is limited to the place where the rod reaches, for example, Even cracks in bridge girders and tunnel zeniths could not be measured.
- Patent Document 1 JP-A-8-94752
- the present invention provides an object, for example, an object having a size of about 0.1 to several millimeters, such as a crack in a concrete structure, separated from the object (for example, several meters to several hundreds).
- the present invention relates to an optical device for measuring from a place (a meter away) and a method for measuring the size of an object using the optical device. Means for solving the problem
- an optical device is an optical device (10) including a telescope (16) having a projection plate (46), and the projection plate (46) includes A plurality of reference scales (52) are provided for comparison with the size (W) of the image (C ') of the object (C) projected onto the projection plate (46).
- the plurality of reference scales (52) are centered on a direction perpendicular to the optical axis (38) of the telescope (16) or the optical axis (38). They are arranged in the circumferential direction with a gap in the direction of displacement.
- each of the plurality of reference scales (52) is a mark having a spread in a two-dimensional direction on the projection plate (46).
- the marks of the plurality of reference scales (52) each have a size different from the marks of the other reference scales in the arrangement direction.
- the mark has a square or circular planar shape.
- an index (54) corresponding to the size of each of the plurality of reference scales (52) is provided in the vicinity of the plurality of reference scales (52).
- the optical device may also include the telescope.
- the distance measuring means (20) includes a laser distance measuring unit or an ultrasonic distance measuring unit.
- An optical device according to another aspect of the present invention provides an index related to the plurality of reference scales (52).
- Computation means (32) for computation is provided.
- An optical device includes an output unit (26) that outputs the dimension (W) of the object (C) calculated by the calculation means (32).
- the image (C ′) of the object (C) is a crack generated in a concrete structure.
- a method for measuring the size of an object using an optical device includes a telescope (16) including a projection plate (46) provided with a plurality of reference scales (52), A ranging unit (20) is provided to measure the distance (L) from the object (C) collimated with the telescope (16) to the reference point (P).
- the dimension (W) of the object (C) is calculated on the basis of the value (54) obtained by comparing two or more and the distance (L) measured by the distance measuring unit (20). Process.
- a measurement method includes:
- the object (C) is a crack generated on the surface (Q) of a concrete structure, and the second step is
- a sub-process for obtaining the width (W) of the crack (C) using the value (W), distance (L), and angle ( ⁇ ) is provided.
- a measurement method includes:
- the object (C) is a crack generated on the surface (Q) of a concrete structure, and the second step is
- a sub-process that assumes an extension line (L) on the surface (Q) and extending in a direction perpendicular to the width dimension of the crack;
- a sub-process for obtaining the width (W) of the crack (C) using the value (W), distance (L), and angle ( ⁇ ) is provided.
- a telescope (16) having a projection plate (46) provided with a plurality of reference scales (52), and a reference point from a crack portion (C) on the plane (Q) collimated by the telescope (16). Up to (P)
- the second step is provided.
- a method for measuring the width of a crack according to another embodiment of the present invention includes:
- the second step is
- a sub-process for obtaining the width (W) of the crack (C) using the value (W), distance (L), and angle ( ⁇ ) is provided.
- a method for measuring the width of a crack according to another embodiment of the present invention includes:
- the second step is
- Sub-process A sub-process for obtaining the width dimension (W) using the value (W), the intersection angle ( ⁇ ), and the distance (L) is provided.
- FIG. 1 is a perspective view of a surveying instrument which is an embodiment of the optical apparatus of the present invention.
- FIG. 2 A block diagram showing the configuration and functions of the surveying instrument shown in FIG.
- FIG. 3 A sectional view showing a schematic configuration of the telescope of the surveying instrument shown in FIG.
- FIG. 4 A diagram showing an object (crack) projected on the focusing screen shown in FIG. 3 and a reference scale.
- FIG. 5 A block diagram showing the configuration and functions of the distance measuring unit shown in FIG.
- FIG. 6 A diagram showing details of the input unit and the display unit shown in FIG.
- FIG. 7 is a diagram for explaining the principle of measuring the object width or crack width.
- Figure 8 Enlarged view of the crack projected on the telescope's focusing screen.
- Fig. 9 Relationship between crack width, crack image width, and angle.
- FIG. 11 is a diagram showing a method for calculating an angle.
- FIG. 12 is a flowchart showing a process for obtaining a crack width.
- ⁇ 13 A view showing another example of the reference scale and dimension index formed on the focusing screen.
- ⁇ 16 A diagram showing another example of the reference scale and dimension index formed on the focusing screen.
- ⁇ 17 A view showing another example of the reference scale and dimension index formed on the focusing screen.
- ⁇ 18 A diagram showing another example of the reference scale and dimension index formed on the focusing screen.
- ⁇ 19 A diagram showing another example of the reference scale and dimension index formed on the focusing screen.
- FIG. 20 is a diagram showing another example of the reference scale and dimension index formed on the focusing screen.
- ⁇ 21 A view showing another example of the reference scale and dimension index formed on the focusing screen.
- the “optical device” includes a telescope, a collimation device including the telescope, and a surveying device having a collimation function and a ranging function.
- object includes a part of an object that does not need to be an independent object of a finite size or a tangible object (for example, a part of a crack generated in a concrete structure).
- FIG. 1 shows a laser surveying device (total station) 10 that embodies an optical device according to the present invention.
- the surveying instrument 10 is connected to a base 12 that is fixedly attached to a tripod (not shown) and attached to a tripod (not shown), and is connected to the base 12 so as to be rotatable about a vertical axis (Z-axis), similarly to a normal surveying instrument.
- a telescope 16 connected to the main body 14 so as to be rotatable about a horizontal axis (X axis).
- the surveying instrument 10 has three axes, a vertical axis (Z axis), a horizontal axis (X axis), and a reference point (reference coordinate or machine coordinate) P intersected by the Y axis that coincides with the optical axis 38 of the telescope 16.
- the surveying apparatus 10 includes an input unit 22 for inputting data necessary for surveying, a display unit 24 for displaying survey results, etc., and data inputted from the input unit 22 and data of survey results.
- Devices e.g. An output unit 26 for outputting to a computer 28.
- FIG. 2 is a block diagram illustrating the configuration of the surveying instrument 10 in terms of functional viewpoint.
- the surveying instrument 10 has a control unit 30.
- the control unit 30 is electrically connected to the ranging unit 20, the input unit 22, the display unit 24, and the output unit 26.
- the ranging unit 20 the input unit 22, the display unit 24.
- the control unit 30 is located at the position collimated by the crack width calculation unit 32 for calculating the size of the object, for example, the width of the crack formed in the concrete structure, and the spatial coordinates of the survey target, for example, the telescope 16.
- a coordinate calculation unit 34 for calculating the three-dimensional coordinates of the crack portion and a storage unit 35 for storing programs and data necessary for coordinate calculation and crack width calculation are provided.
- the surveying instrument 10 has components necessary for surveying, such as a leveling unit and an angle measuring unit.
- FIG. 3 shows a schematic configuration of the telescope 16.
- the telescope 16 is placed in order along the optical axis 38 from the object side to the surveying operator side (from the left side to the right side in the figure) in the lens barrel (indicated by reference numeral 36 in FIG. 1).
- An image is formed on the focusing screen 46 through the lens 42 and the erecting prism 44, and the object image is enlarged and observed by the operator through the eyepiece lens 48.
- FIG. 4 shows an object image or an image formed on the focusing screen 46 and observed through the eyepiece 48 with the crosshairs 50 and a plurality of marks or reference scale 52 of the collimation index drawn on the focusing screen 46. Shown with crack image C '. The intersection of the crosshairs 50 coincides with the optical axis 38.
- a plurality of (for example, 16) reference scales 52 are formed in the peripheral region of the focusing screen 46.
- the plurality of reference scales 52 are square or strip-shaped mark forces each having a large horizontal dimension and a small vertical dimension, and are arranged in a row at intervals in the vertical direction perpendicular to the optical axis.
- the horizontal lengths of the plurality of band-like reference scales are the same.
- the vertical dimensions of the strip-shaped reference scales are different, and the reference scale placed in the top row has the shortest vertical dimension of the reference scale placed in the bottom row.
- the vertical dimension of the reference scale located at the upper level is made larger so that the vertical dimension of the scale is the largest.
- the vertical dimension of the reference scale 52 up to the uppermost stage in the second stage force is an integral multiple of the vertical dimension of the lowermost reference scale 52.
- the numerical value of the dimension index 54 corresponding to the reference scale is drawn next to each reference scale 52.
- the dimension index “1” is next to the reference scale 52 (1) in the top row, and the reference scale in the bottom row is displayed. 52
- the dimension index “16” is drawn beside (16).
- the dimension indicator 54 may be other symbols (for example, alphabets) that need not be numerical values.
- the numerical value of each dimension index 54 is related to the actual vertical dimension of the corresponding reference scale 52, and the relationship between the dimension index 54 and the actual vertical dimension is stored in the storage unit 35 in the form of a table or a mathematical expression. .
- the operator compares the object image projected on the focusing screen with the reference scale, and calculates the numerical value of the reference scale having the same size as the object image or the size index of the reference scale having the size closest to the object image.
- the surveying instrument 10 can calculate the size of the object image projected on the focusing screen 46.
- the distance measuring unit 20 outputs a laser beam, for example, a light emitting unit (laser device) 58 such as a laser diode, and a light receiving unit 60 that receives laser reflected light of an object (for example, crack) force.
- the calculation unit 62 calculates the distance from the object to the reference point P based on the time from when the laser beam is emitted until the force is received, and the laser beam emitted from the light emitting unit 58.
- an optical system 64 for guiding the laser beam which guides the object along the optical axis 38 of the telescope 16 and also returns the object force along the optical axis 38 to the light receiving unit 60.
- a prism 66 constituting a part of the optical system 64 is disposed inside the telescope 16, so that the path of the laser beam 56 coincides with the optical axis 38 of the telescope 16.
- the distance calculation in the laser distance measuring unit 20 is not limited to the method using the time until the light emission power is received. For example, the phase difference distance between the two can be obtained.
- the input unit 22 includes a plurality of keys, for example, function keys 68, a numeric key 70, a cursor movement key 72, and an enter key 74.
- function key 6 8 is used for instructing execution of processing in dimension measurement of a crack described later.
- the numeric keypad 70 is used to input a numerical value of the dimension index 54 drawn on the focusing screen 46.
- the display unit 24 has a liquid crystal display 76.
- the liquid crystal display 76 includes numerical values measured by the distance measuring unit 20 (for example, distance and azimuth angle), numerical values of the dimension index 54 input via the numeric keypad 70, and crack width calculated by the crack width calculating unit 32.
- the coordinate values calculated by the coordinate calculation unit 34, measurement results, and other information necessary for operation are displayed.
- the output unit 26 outputs various information (measurement results and the like) displayed on the display unit 24 to a computer 28 connected thereto.
- An oblique plane (in the figure, a plane including a triangle formed by points P 1, P 2 and P 3) is set to ⁇ 3. Also
- the point that intersects with 0, point P is the point on the edge line L where the oblique plane Q and the vertical plane Q intersect.
- Point P passes through point P and crosses the crack C at a right angle with the other edge line L.
- FIG. 8 shows an image projected on the focusing screen 46 of the telescope 16 of the surveying instrument 10 in this situation.
- symbol C ′ indicates the projected image of crack C
- symbol W ′ indicates the width of the projected crack image C ′.
- the symbols P ', P', P ', P' correspond to the points P, P, P, P in Fig. 7, respectively.
- Lines L 'and L' indicate the projection lines corresponding to the edge lines L and L in Fig. 7, respectively.
- the Symbols Q ′ and Q ′ are lines obtained by projecting the planes Q and Q of FIG.
- the projected image Q ′ of the plane Q crosses the crack image C ′ obliquely. Also, the projection of the line connecting points P and P corresponding to the actual width W of crack C
- the line is a line that passes through the projection points P ′ and P and obliquely crosses the crack image W ′.
- Figure 8 shows
- lines other than lines L 'and L' for example, projection line Q ', points P' and P
- the line connecting 'the line connecting point P' and point P ') is actually a line that does not appear on the focusing screen 46
- the line corresponding to the actual width W of the crack C is a line that obliquely crosses the crack image C '(a line connecting the point P' and the point P ').
- the width of the crack image appearing on the focusing screen 46 is used to determine the actual crack width
- a crack image that the observer reads from the focusing screen 46 is projected.
- the width W ' is the length of this perpendicular.
- Points P 1 and P 2 are also, a rectangular plane that includes the edge line L and the perpendicular line (the line connecting points P and P)
- the width w can be obtained.
- the perpendicular length W " is approximately proportional to the product of the width W 'of the crack image C' imaged on the focusing screen 46 and the distance L from the focusing screen 46 to the crack C, and is given by Equation 1 below. . [Number 1]
- the coefficient ⁇ is a constant determined by the optical system of the telescope, for example, a value determined by the magnification of the objective lens.
- the object (crack) force and the distance L to the focusing screen can be obtained based on the distance measurement results obtained by the distance measuring unit.
- the reference point repulsive force and the distance AL to the focusing screen 46 are already known. Also, the reference point
- the distance L up to 0 0 is obtained by the distance measuring unit 20. Based on these values, crack width calculator 3
- the width W ′ of the crack image C ′ formed on the focusing screen 46 is obtained based on a dimension index (for example, values “1” to “16”) input by the operator through the input unit 22. More specifically, as described above, the relationship between the dimension index drawn on the focusing screen 46 and its actual vertical dimension is stored in the storage unit 35 in the form of a table or a mathematical expression. Therefore, the operator compares the width W ′ of the crack image C ′ projected on the focusing screen with the reference scale, and is closest to the reference scale or crack image having the same size (vertical dimension) as the width W ′.
- a dimension index for example, values “1” to “16”
- the crack width calculation unit 32 determines the width W of the crack image on the focusing screen 46 based on the table or the relational expression of the storage unit 35. , Is calculated. For example, when the operator inputs the dimension index “10” from the input unit 22, the crack width calculation unit 32 calculates the actual crack image width as “5 ⁇ mj”.
- Equation 1 is an ideal equation where the perpendicular length W "is expressed as being proportional to the width W of the crack image C 'and the distance L from the focusing screen 46 to the crack L. Since the actual optical system includes various aberrations, the following formula 2 obtained by modifying formula 1 is used for the actual calculation, and the values of the coefficients ⁇ and a included in this formula 2 are obtained experimentally. Is preferable
- Equation 3 The angle ⁇ is, for example, the line connecting point ⁇ and point ⁇ and the line connecting point ⁇ 'and point ⁇ in Fig. 7.
- the coefficients a and ⁇ can be obtained by the following procedure, for example. First, the wall
- these four values (L, W, W, 0) are statistically processed (for example, the least square method) to obtain coefficients a and a.
- these four values (L, W, W, 0) are statistically processed (for example, the least square method) to obtain coefficients a and a.
- draw a mark of a predetermined size (width) W on the wall change the distance L (L ⁇ ⁇ -L) to the wall force survey device, and use the dimension index W for each distance. It can also be obtained by reading '(W'---W ') and statistically processing those values (L, W, W', 0).
- the direction of the cracks generated on the surface of the concrete structure is unusual. It is constant and has a winding shape. Accordingly, in the actual measurement of the crack width, as shown in FIG. 11, an extension line L of the crack portion C to be measured for the crack width projected on the focusing screen 46 is assumed.
- This extension line L is a line extending in a direction perpendicular to the width direction of the crack portion C to be measured.
- the extension line L can be calculated by identifying two points on the surface of the structure that appear to be on the extension line L. The identified points are indicated by P 1 and P 2 in the figure. As explained later, the crack part
- Calculation is made using 1 1 2 2 2 3 3 3 0 and the reference point force and the oblique distance and azimuth to each point.
- the function of the concrete surface is the coordinates of the three points ⁇ , ⁇ , ⁇ (X, y, ⁇ ), (X, y, ⁇ )
- Equation 7 ( ⁇ , y, ⁇ ), for example, defined by Equation 7.
- m 3 (x 2 -3 ⁇ 4) (y 3 - ⁇ )-(x 3 -3 ⁇ 4) (y 2 -y,)
- the point P "on the extension line L is calculated, and it is obtained as a straight line connecting this point P" and the reference point P.
- Equation 8 the perpendicular is defined by Equation 8 below.
- the reference point ⁇ (X, y, ⁇ ) is lowered to the plane Q (or a virtual plane including the plane).
- the coordinate P ' is the point on the plane Q that has the smallest distance from the reference point P.
- a point P ′ on the plane that minimizes the distance to the point P is calculated, and the point P is directly connected to the reference point P.
- Equation 9 the perpendicular is defined by Equation 9 below.
- Line L is defined by Equation 10 below.
- intersection angle ⁇ is the angle connecting the three points ⁇ , ⁇ ", ⁇ '.
- Step S101 Turn on the crack width measurement mode key (function key) of the input unit 22. Thereby, the control unit 30 starts the crack width measurement mode based on the ON signal.
- Step S102 The crack portion C (see Fig. 11) to be measured is collimated with the telescope 16.
- Step S103 The focusing lens 42 is adjusted so that the image of the crack portion C is clearly formed on the focusing screen 46.
- Step S104 The distance measuring key (function key) of the input unit 22 is turned on.
- the control unit 30 drives the distance measuring unit 20 based on the ON signal, and the reference point P force crack portion C distance
- Measure L The measured distance L is stored in the storage unit 35. At this time, with distance L
- the distance L from the focusing screen to the crack is calculated based on the distances L and A L.
- Step S105 A crack extension line L of the crack portion C is imagined on a plane (concrete surface) Q, and two points P, P on the extension line L and another plane on the plane near the crack portion C are separated.
- Step S106 The telescope 16 is moved in the horizontal direction and the Z or vertical direction, and the reference scale 52 is arranged in the vicinity of the crack image C ′, or the reference scale 52 is superimposed on the crack image C ′.
- Step S107 Reference scale 5 having the same or closest size as the width of crack image C '
- Step S 108 The read dimension index 54 is input from the input unit 22.
- Step S109 The crack width calculation unit 32 of the control unit 30 includes the input dimension index and the storage unit
- the calculated width W ′ is stored in the storage unit 35.
- Step S110 The crack width calculation unit 32 also determines the position of the reference point P, the measurement points P 1, P 2, and P 3.
- Step S111 The crack width calculation unit 32 uses the distance L, the coefficient ⁇ , a, and the crack image width W.
- Step S112 Display the calculated crack width W on the liquid crystal display of the display unit 24.
- the crack width calculation unit is provided in an external device connected to the output unit 26 of the surveying device 10, for example, the computer 28, and based on the above-described calculation process based on the program stored in the computer 28.
- the computer 28 may calculate the crack width.
- the measurement result of the distance measuring unit 20 (the reference point force and the distance to the object) is transmitted from the surveying device 10 to the computer 28.
- the dimension index (numerical value) of the reference scale 52 may be directly input to the computer 28.
- the computer 28 calculates the size of the object image from the dimension index based on a table or a mathematical expression showing the relationship between the dimension index and the object image dimension.
- the size of the object image and the distance force The actual size of the object is calculated.
- each reference scale extends in the circumferential direction centered on the optical axis.
- each reference scale may have an arc shape extending by a predetermined angle in the force-circumferential direction having a substantially circular shape.
- a plurality of reference scales having a small lateral width are arranged in the upper area of the focusing screen, and a plurality of reference scales having a larger lateral width are arranged in the radial direction in the lower area of the focusing screen.
- the plurality of reference scales have the same width, and for example, a scale is provided in the horizontal direction perpendicular to the optical axis.
- each reference scale is represented by a solid, hollow circle. As described above, the shape and arrangement direction of the reference scale can be freely changed so that the size of the object image projected on the focusing screen can be read more easily.
- the reference scale force of a solid circle or a hollow circle is preferably arranged at equal intervals on one or a plurality of circumferences centered on the optical axis.
- the distance measuring means is not limited to the distance measuring section using a laser, but may be an ultrasonic distance measuring section using ultrasonic waves, for example.
- the reference scale dimension index is also input as the input unit force.
- a table showing the relationship between the dimension index and the object image dimension is prepared, and the object image obtained from the table is prepared. It is also possible to input the dimensions as input force.
- the reference scale is provided on the focusing screen.
- the focusing screen is arranged in the optical axis direction.
- a transparent plate (projection plate) such as glass may be placed within the range of depth of focus before and after, and a reference scale may be drawn on this transparent plate.
- the method for measuring the size of a crack using the optical device according to the present invention has been described above.
- the measurement object is not limited to a crack, and any object can be the measurement object.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP06767348.3A EP1939583B1 (en) | 2005-09-15 | 2006-06-26 | Optical device, and method of measuring the dimension of object using optical device |
JP2007503140A JP3996946B2 (ja) | 2005-09-15 | 2006-06-26 | 光学装置、および光学装置を用いて物体の寸法を測定する方法 |
US12/066,756 US7667823B2 (en) | 2005-09-15 | 2006-06-26 | Optical device, and method of measuring the dimension of object using optical device |
CN2006800339283A CN101263362B (zh) | 2005-09-15 | 2006-06-26 | 光学装置、及使用光学装置测量物体尺寸的方法 |
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JP2005-268435 | 2005-09-15 | ||
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US (1) | US7667823B2 (ja) |
EP (1) | EP1939583B1 (ja) |
JP (1) | JP3996946B2 (ja) |
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CN105180816A (zh) * | 2015-05-27 | 2015-12-23 | 中国科学院长春光学精密机械与物理研究所 | 光电接收器与指示光栅气浮调整安装装置及其安装方法 |
JP6089245B1 (ja) * | 2015-11-25 | 2017-03-08 | クモノスコーポレーション株式会社 | 光学装置、光学装置に組み込まれる焦点板、及び光学装置を用いた測量方法 |
CN105423916A (zh) * | 2015-11-30 | 2016-03-23 | 中国联合网络通信集团有限公司 | 一种物体尺寸的测量方法和测量系统 |
CN110231034A (zh) * | 2019-06-10 | 2019-09-13 | 国网江苏省电力有限公司南京供电分公司 | 室外堆场物资间接定位方法与可视化模型 |
CN110231034B (zh) * | 2019-06-10 | 2023-05-09 | 国网江苏省电力有限公司南京供电分公司 | 室外堆场物资间接定位方法与可视化模型 |
JP2021015054A (ja) * | 2019-07-12 | 2021-02-12 | 西日本高速道路株式会社 | ひび割れ幅測定装置、ひび割れ幅測定プログラムおよびひび割れ幅測定方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101263362B (zh) | 2011-01-19 |
US7667823B2 (en) | 2010-02-23 |
US20090135401A1 (en) | 2009-05-28 |
KR20080044873A (ko) | 2008-05-21 |
EP1939583A1 (en) | 2008-07-02 |
EP1939583B1 (en) | 2013-11-06 |
KR101029397B1 (ko) | 2011-04-14 |
EP1939583A4 (en) | 2011-11-30 |
CN101263362A (zh) | 2008-09-10 |
JPWO2007032136A1 (ja) | 2009-03-19 |
JP3996946B2 (ja) | 2007-10-24 |
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