JP4488806B2 - Profile measuring device for plate products - Google Patents

Description

  The present invention relates to a plate-like product profile measuring apparatus that is highly accurate and inexpensive in production lines, inspection lines, and the like for producing steel plates, aluminum, glass, paper, and special steel.

  Equipment for measuring shapes is widely available in production lines and inspection lines for sheet steel products, aluminum, glass, special steel, etc., but in order to achieve high accuracy, the object to be measured Needless to say, the inherent measurement accuracy of the sensor that measures the distance up to, but the rigidity of the mechanical structure, the installation accuracy at the time of installation, the dynamic position change due to the traveling of the carriage equipped with the distance meter, the vibration due to disturbance, It was extremely difficult to maintain measurement accuracy because all factors such as expansion and distortion of the structure due to the environment overlapped.

Conventionally, a method is known in which a width meter or a distance meter is fixed and a measurement object is moved while moving.
As a conventional plate shape meter as such, two width meters for measuring the width of the plate are set apart from each other by a certain distance, and the width coordinate information obtained from these two width meters and the plate are spaced from each other by the above-mentioned distance. The slip amount of the plate is calculated from the reference signal generated every time the vehicle travels, and the data measured by one width meter is corrected by the lateral slip amount of the plate (see, for example, Patent Document 1). .

In addition, other conventional long object profile measurement methods measure at least three distance meters arranged along the measurement method to measure each distance to the opposing long object surface, and the three or more points are measured. Approximating the profile at the measurement position to the multi-order curve based on the distance measurement value is performed by sequentially changing the measurement position along the measurement direction, and the profile of the long object is measured from the multi-order curve obtained sequentially. (For example, see Patent Document 2).
Furthermore, other conventional methods for measuring the warpage of a plate-shaped product are to install three or more optical distance meters on a line perpendicular to the traveling direction of the plate-shaped product, keeping a certain distance from the product. The warpage of the plate-like product is measured using the displacement measurement data obtained thereby (see, for example, Patent Document 3).

As described above, in Patent Documents 1 to 3, the measurement device is fixed in the line by fixing the measuring device for the measurement of undulation (flatness) or bending (linearity of the side surface) of a long object. Although it is a method of measuring while passing, there is a method of measuring by running a measuring device while keeping the measurement object stationary in the line.
JP 59-44612 A (page 3, FIG. 3) Japanese Patent Laid-Open No. 10-47950 (2nd page, FIG. 1) Japanese Patent Laid-Open No. 06-82237 (2nd page, FIG. 1)

  In the method of measuring while fixing the former measuring device and passing the material to be measured through the line, the table for conveying the object to be measured is generally a roller table, a conveyor table, etc. In addition to the waviness (flatness) and bend (linearity of the side surface) of the object to be measured, vertical fluctuations on the table during conveyance become a problem.

In addition, in the latter method of measuring by running the measuring device while the object to be measured is stationary in the line, the centering accuracy of the rail on which the measuring device is driven is not only affected by the difference in temperature and measurement environment. Rail bending or bending occurs.
Further, the measuring device itself does not move linearly by running the measuring device due to its own weight. That is, due to these phenomena, the measuring device itself moves in a meandering and wavy manner, and accuracy cannot be sufficiently maintained in a device that requires absolute distance measurement.
For this reason, sufficient protection and rigidity against environmental disturbances are required to eliminate the temperature change that is a disturbance, including the peripheral equipment of the device that measures the shape, and to minimize the meandering and swell of the measuring device itself. There is a problem that the apparatus becomes large and very expensive.

  Therefore, the present invention has meandering and undulation that occur when the measuring device itself travels when the measuring device is traveled and measured while the plate-like product that is the object to be measured is stationary in the line. It is another object of the present invention to provide an inexpensive profile measuring device for a plate-like product which can accurately measure the shape of warpage, undulation and twist of the plate-like product by correcting it.

The profile measuring device for a plate-like product according to the present invention is a measurement carriage that is positioned above a stationary object to be measured and moves in the length direction of the object to be measured, and a carriage movement that measures the movement amount of the measurement carriage. Quantity measuring device, a plurality of flat surface area meters installed on the measurement carriage and measuring the distance to the surface of the stationary object to be measured , and each flat area distance meter installed on the measurement carriage, the width of the object to be measured a rangefinder drive device for moving in a direction, and a distance meter movement measuring apparatus for measuring the amount of movement of the flat portion rangefinder amount of driving of rangefinder drive device, in one horizontal even without least the lateral position of the measuring carriage Piano wire that is tensioned and tension-controlled by counterweight or directly measuring tension and tension control , vertical position detector that is installed in the measurement carriage and detects the amount of fluctuation in the direction perpendicular to the piano wire , and measurement Installed on the dolly and on the piano wire A horizontal position detector for detecting a variation horizontal position and is installed in the measuring carriage, and at least one edge portion rangefinder measures the distance to the edge portion of the measured object stationary and carriage movement measuring device and a plurality of flat portions rangefinder and the respective measured values of the vertical position detecting device reads in each length of the piano wire, calculates the catenary of piano wire based on its own weight and tension, the measurement value and the catenary weight And calculating means for correcting the distance to the measurement target at each position in the length direction of the measurement target so as to eliminate the influence of meandering and undulation that occurs when the measurement carriage travels. The calculating means calculates a moving amount of the plurality of flat surface distance meters based on the measured values of the edge distance meter and the horizontal position detector, and drives the distance meter driving device based on the calculated values .

In the present invention, each measurement value of the carriage movement measuring device and a plurality of flat portions rangefinder and a vertical position detection device reads in each length of the piano wire, the catenary of piano wire based on its own weight and tension Based on the measured value and the amount of catenary, the distance to the measurement target at each position in the length direction of the measurement target is removed from the influence of meandering and undulation that occurs when the measurement carriage travels. Further, based on the measurement values of the edge part distance meter and the horizontal position detector, the movement amount of the plurality of flat part distance meters is calculated, and the distance meter driving device is driven by the calculated value . Even if there is meandering or undulation when the measuring carriage travels, it is possible to measure the distance to the surface of the object to be measured at each position in the length direction of the object to be measured with higher accuracy, and an inexpensive device. To provide Can.
Accordingly, at least one or more of warpage, undulation, and twist of the measurement target can be obtained by calculation based on the data of the distance to the measurement target surface at each position in the length direction of the measurement target.

  1 is a plan view showing a profile measuring device for a plate product according to an embodiment of the present invention, FIG. 2 is a front view showing the profile measuring device for the plate product, and FIG. 3 is a profile measuring device for the plate product. FIG. 4 is an explanatory view showing the catenary of the piano wire, FIG. 5 is a graph showing the amount of catenary obtained by calculating the piano wire, and FIG. 6 is a block diagram showing the configuration of the tension control of the piano wire. 7 is a block diagram showing the system configuration of the profile measuring apparatus for the plate-like product, FIG. 8 is an explanatory diagram showing the detection principle of the vertical position detector, and FIG. 9 is the surface of the object to be measured from the reference line for linear reference measurement. FIG. 10 is an explanatory diagram showing a state in which the planar distance meter does not follow based on the measurement result of the edge part distance meter, and FIG. 11 is a planar part based on the measurement result of the edge part distance meter. Followed distance meter FIG. 12 is an explanatory diagram showing the deflection of the beam for the measurement truck due to its own weight, FIG. 13 is an explanatory diagram showing the corrected trajectory of the measurement truck, and FIG. 14 shows the warpage of the plate product FIG. 15 is an explanatory view showing the undulation of the plate product, and FIG. 16 is an explanatory view showing the twist of the plate product.

In FIG. 1 to FIG. 3, reference numeral 1 denotes a steel plate that is an object to be measured, and reference numeral 2 denotes a transport roller that transports the steel plate 1. Since the shape of the steel sheet 1 conveyed by the conveying roller 2 changes with movement due to its own weight, it is necessary to arrange the conveying rollers 2 as densely as possible to prevent this.
Reference numeral 3 denotes a beam for a measuring carriage which is installed in parallel above both sides of the transport roller 2 and is supported by four left and right mounting posts 4. Reference numeral 5 denotes a traveling shaft having wheels 6 at both ends, and the wheels 6 roll on the measuring cart beam 3 and travel on the measuring cart beam 3.

  Reference numeral 7 denotes a gate-type measuring carriage suspended from both ends of the traveling shaft 5. The measuring carriage 7 includes a horizontal beam member 7a and vertical column members 7b connected to both ends of the beam member 7a. The beam member 7 a is provided with a traveling motor 8, and the traveling motor 8 rotationally drives the traveling shaft 5 via a power transmission mechanism (not shown).

  Reference numeral 9 denotes a pulse generator (hereinafter referred to as PLG) which is directly connected to the traveling motor 8 and converts the motor rotation speed into pulses. In this embodiment, the PLG 9 can determine the X coordinate position by counting output pulses from the normal stop (home) position of the measurement carriage 7 to the movement position of the measurement carriage 7. Here, the X coordinate position refers to the coordinate position in the length direction of the measurement target object 1 when the length direction of the measurement target object 1 is the X-axis direction. Note that the output unit of the PLG 9 is XX (mm / Pulse), which determines the X coordinate resolution. The width direction of the measurement target object 1 is the Y-axis direction.

Reference numerals 10 a and 10 b are provided at lower positions inside the column member 7 b of the measurement carriage 7, and two edge portion distance meters for measuring the distance to the edge portion of the measurement target object 1, 10 c are beam members of the measurement carriage 7. One flat part distance meter 10d provided at the center of the lower surface of the object 7 to measure the distance to the central surface of the object 1 to be measured is provided on both sides of the lower surface of the beam member 7a of the measuring carriage 7, and the object 1 to be measured 1 It is two plane part distance meters which measure the distance to the both-sides surface.
For example, a CCD laser displacement sensor is used for the edge portion distance meters 10a and 10b and the plane portion distance meters 10c and 10d.

These three plane distance meters 10c and 10d are respectively moved in the Y-axis direction by three servo mechanisms 12a provided on the lower surface of the beam member 7a of the measurement carriage 7. Each servo mechanism 12a has a built-in position detector and can determine the coordinate position in the Y-axis direction.
Further, the edge distance meters 10a and 10b are also moved in the vertical direction by the servo mechanism 12b as shown in FIG. Therefore, even if the thickness dimension of the steel plate 1 is different, the distance measurement of the edge portion of the steel plate 1 can be handled by moving the edge portion distance meters 10a and 10b up and down by the servo mechanism 12b.

11a and 11b are horizontal position detectors provided at a lower position outside the column member 7b of the measuring carriage 7. The horizontal position detector is provided below the piano wire column 22 arranged separately from the gantry column 4 and stretched horizontally. The horizontal position of the line 21a is detected to measure the meandering and undulation of the measuring carriage 7 itself.
Reference numerals 11c and 11d denote vertical position detectors provided at positions above the outside of the column member 7b of the measuring carriage 7, which are passed above the piano wire column 22 and detect the vertical position with respect to the horizontally stretched piano wire 21b. To measure the meandering and undulation of the measuring carriage 7 itself.

  These piano wires 21a and 21b are bound at one end to the left piano wire support 22, and the other end is hung on a pulley 23 provided on the right piano wire support 22, and a counterweight 24 is attached to the other end and suspended. It has a structure. In this case, catenary (bending) occurs in the horizontally stretched piano wires 21a and 21b. The amount of catenary, that is, the amount of bending, is determined by the weight per unit length of the wire, the distance, and the tension applied to the wire, but since these values are all constant, the amount of bending affects the temperature change and the elongation of the wire itself. It becomes constant without receiving.

  FIG. 4 shows the catenary of the horizontally stretched piano wire 21b, and the graph of FIG. 5 shows an example of the result of calculating the amount of catenary when the piano wire 21b of φ0.5 mm is stretched horizontally by 8 m. . The calculation of the catenary amount is performed based on the following catenary amount calculation formula. If the counterweight 24, that is, if the tensile stress does not change in a certain direction and does not change, the x-axis The amount of catenary y in the coordinates is constant.

Here, H is the horizontal tension Kgf of the piano wire, W is the load Kgf / m applied to the unit length of the piano wire, e is the base of the natural logarithm, and x is the x-axis coordinate based on 0 point.
The catenary amount calculation formula is an example of a general formula for obtaining the catenary amount, and it is known that there are various formulas for obtaining the catenary amount in addition to this. In the case where the amount of catenary is obtained, it is not limited to the above formula for calculating the amount of catenary.

In the above embodiment, in order to make the tension of the piano wire 21a or 21b constant, the counterweight 24 is attached to the other end of the piano wire that is hung around the pulley, but the tension control configuration as shown in FIG. It may be.
That is, as shown in FIG. 6, the other end of the piano wire 21a or 21b is hung around the pulley 22 and fixed, and the pulley 22 is rotated by the motor 41 to adjust the tension of the piano wire. And the tension | tensile_strength of a piano wire is measured with the load cell 42 provided in the pulley 22, and the tension control apparatus 43 controls rotation of the motor 41 according to the measured value of the load cell 42, Therefore A piano wire is used instead of the counterweight 24. The tension may be controlled to be constant.

  In FIG. 7, reference numeral 31 denotes a process computer, which is used in a system for transmitting data to a higher-level process computer, a computer constructed for product management, etc., and managing it in the same way as other management items. Conversely, steel plate information is transmitted in advance from the host process computer, product management computer, etc., and the position of the flat surface distance meters 10c, 10d, etc. is moved in the width direction in advance to minimize the time lag or independently. Or data together with the upper information. In communication with the host process computer, information such as the type, width, thickness, material, production information, and steel plate number of the steel plate is exchanged.

Reference numeral 32 denotes a data analysis arithmetic device that performs arithmetic processing on the profile of the steel sheet 1 that is the object to be measured and drives and controls the servo mechanisms 12a and 12b. The data analysis calculation device 32 receives information on the edge part distance meters 10a10b, the plane part distance meters 10c, 10d, the piano line horizontal position detectors 11a, 11b, and the piano line vertical position detectors 11c, 11d.
Reference numeral 33 denotes a system control device that calculates the X and Y coordinates from the output result of the PLG 9 of the measurement target object 1 to drive and control the driving motor 8 to move the measurement carriage 7 to a predetermined position. Further, the system control device 33 inputs the position information of the XY coordinates of the measurement carriage 7 in the steel plate 1 to the data analysis calculation device 32.
Reference numeral 34 denotes an output terminal such as a printer for printing the calculation result of the data analysis calculation device 32.

Next, the detection principle of the vertical position detectors 11c and 11d will be described with reference to FIG.
As the vertical position detectors 11c and 11d, for example, a laser dimension measuring device is used. As shown in FIG. 8A, the light emitting unit 100 that irradiates slit-shaped laser light and the light emitting unit 100 irradiates. The light receiving unit 101 is provided with a lens 102, a light receiving sensor 103, and an amplifier 104 that amplifies the output of the light receiving sensor 103.
In the laser dimension measuring device, the light emitting unit 100 irradiates a slit-shaped laser beam, and the light receiving unit 101 receives and outputs the state of the portion blocked by the piano wire 21 which is a measurement object there between. .

Therefore, in the light receiving unit 101, as shown in FIG. 8B, the distance A from the reference surface of the base to the center of the portion that blocks light, and the distance from the reference surface of the base to the lower surface of the portion that blocks light. B, an output of a distance C from the reference surface of the base to the upper surface of the portion that blocks the light and an output of the range D of the portion that blocks the light are obtained.
In this embodiment, since the purpose is to measure the position of the piano wire 21b, the distance A from the reference plane of the base to the center of the portion that blocks the light, or the lower surface of the portion that blocks the light from the reference plane of the base. The distance B is used as an output. This is because foreign matter such as dust is difficult to adhere to other than the upper surface of the piano wire 21b, and the influence of the foreign matter is taken into consideration.

  The horizontal position detectors 11a and 11b also use laser dimension measuring devices, and the vertical position detectors 11c and 11d are arranged horizontally with respect to the piano wire 21b, whereas the horizontal position detector 11a. , 11b is different from the piano wire 21a in that the detection principle of the horizontal position detectors 11a, 11b is the same as that of the vertical position detectors 11c, 11d. Omitted.

Next, the measurement principle of the distance Hc from the piano wire 21b to the flat surface distance meters 10c, 10d by the vertical position detectors 11c, 11d will be described with reference to FIG.
First, the dimension measurement of the distance A1 from the reference plane of the base where the vertical position detectors 11c and 11d are installed to the center of the piano wire 21b, which is a portion that blocks light, is as described above. The dimension of F1 is the distance from the reference plane of the base to the flat part distance meters 10c, 10d, and is determined when the vertical position detectors 11c, 11d and the flat part distance meters 10c, 10d are incorporated in the measurement carriage 7. It ’s something that does n’t change.

Hm is a distance from the plane distance meters 10c and 10d to the upper surface of the steel plate 1 on the conveying roller 2, that is, a value measured by the plane distance meters 10c and 10d.
Therefore, the distance Hc from the piano wire 21b to the flat surface distance meters 10c and 10d is Hc = A1 + F1, and the distance from the reference piano wire 21b to the upper surface of the steel plate 1 can be expressed as Hc + Hm.

  However, since the measuring carriage 7 incorporating the vertical position detectors 11c and 11d and the flat surface distance meters 10c and 10d moves up and down as the vehicle travels, the distance A1 from the base reference surface to the center of the piano wire 21b changes. It will be. Moreover, although the piano wire 21b has catenary, the position of each part is unchanged.

Therefore, the distance Hm to the upper surface of the steel plate 1 is measured by the flat surface distance meters 10c and 10d, the distance Hc to the piano wire 21b is measured by the vertical position detectors 11c and 11d, and the value Hm + Hc obtained by adding these measurement results. Is the distance from the piano wire 21. In this case, the distance Hs from the virtual reference straight line surface to the upper surface of the steel plate 1 can be calculated by correcting the catenary amount of the piano wire 21 at a certain X coordinate point.
Therefore, the distance Hm to the upper surface of the steel plate 1 measured by the flat surface distance meters 10c and 10d when there is no vertical waviness of the measuring carriage 7 itself at a certain X coordinate point can be expressed by the following equation.

Hs− (catenary amount + Hc [A1 + F1]) = Hm
And since Hs and Hm in the above formula in the case where there is no undulation in the vertical direction of the measuring carriage 7 itself at any X coordinate point, they become reference values, respectively. A1 is a variable that changes relative to the catenary amount of the piano wire 21 as the X coordinate point changes. If a certain X coordinate point is determined, the change amount of A1 can be obtained from the calculated catenary amount. it can.
Then, when the measurement carriage 7 itself changes due to vertical waviness at a certain X coordinate point, the change value of the distance A1 from the base reference plane measured by the vertical position detectors 11c and 11d to the center of the piano wire 21b. Subtracting the amount of change in A1 based on the changed amount of catenary from the actual amount of change in A1 when the measuring carriage 7 itself changes due to vertical undulations.
Therefore, the true distance Hm at a certain X coordinate point can be obtained by subtracting the actual change amount of A1 from Hm obtained by the above formula.

Next, the measurement principle of the distance Wc from the piano wire 21a to the edge portion distance meters 10a and 10b in the horizontal position detectors 11a and 11b will be described with reference to FIG.
First, A2 is the distance from the reference plane of the base where the horizontal position detectors 11a and 11b are installed to the center of the piano wire 21, which is a portion that blocks light, and the dimension of F2 is the distance from the base reference plane to the edge portion. The distance to the total 10a, 10b is determined when the horizontal position detectors 11a, 11b and the edge distance meters 10a, 10b are incorporated in the measurement carriage 7, and does not change.

Wm is a distance from the edge portion distance meters 10a and 10b to the edge portion of the steel plate 1 on the conveying roller 2, that is, a value actually measured by the edge portion distance meters 10a and 10b.
Therefore, the distance Wc from the piano wire 21a to the edge portion distance meters 10a and 10b is Hc = A2 + F2, and the distance from the reference piano wire 21a to the edge portion of the steel plate 1 can be represented by Wc + Wm.

  However, since the measuring carriage 7 incorporating the horizontal position detectors 11a and 11b and the edge portion distance meters 10a and 10b moves left and right as the vehicle travels, the distance A2 from the reference plane of the base to the center of the piano wire 21a changes. It will be. Further, in this case, since the horizontal position is detected, there is no need to consider the catenary of the piano wire 21a, so the position of each part is unchanged.

  Therefore, the distance Wm to the edge part of the steel plate 1 is measured by the edge part distance meters 10a and 10b, the distance Wc to the piano wire 21a is measured by the horizontal position detectors 11a and 11b, and these measurement results are added. Wm + Wc is the distance from the reference position of the piano wire 21a. In this case, it is not necessary to correct the catenary amount of the piano wire 21a.

By the way, as mentioned above, since the distance A2 from the base reference plane to the center of the piano wire 21a changes depending on the horizontal waviness of the measuring carriage 7 itself, there is no initial waviness of the measuring carriage 7 itself. Based on the value of the distance A2 from the reference surface of the base to the center of the piano wire 21a, the distance Wm to the edge portion of the steel plate 1 measured by the edge distance meters 10a and 10b at this time is set as a reference value. .
Then, when the measurement carriage 7 itself changes due to the undulation in the left-right direction, the change value of the distance A from the reference plane of the base measured by the horizontal position detectors 11a and 11b to the center of the piano wire 21a is used as the edge portion. By subtracting from the distance Wm to the edge portion of the steel plate 1 measured by the distance meters 10a and 10b, the true distance Wm can be obtained.

Next, the operation of the profile measuring apparatus for plate products according to the embodiment of the present invention will be described.
First, the steel plate 1 that is the object to be measured placed on the transport roller 2 is transferred to a position where the profile measuring device for the plate-like product is located as shown in FIG.
Next, the distance from the measurement point 1 to the measurement point n at each measurement point position from the measurement point 1 to the measurement point n is flattened while the measurement carriage 7 at the right end of the profile measuring device for the plate-like product is moved in the flow direction. Measurement is performed with the distance meters 10c and 10d.

  In this case, as shown in FIG. 10, when the steel plate 1 coincides with the flow direction, that is, when the center line of the conveying roller 2 and the center line of the steel plate 1 are substantially coincident, each measurement point is from the edge portion of the steel plate 1. Since the plane distance meters 10c and 10d do not deviate from the positions of the target measurement points, the plane distance meters 10c and 10d remain fixed at predetermined positions on the measurement carriage 7. .

  Accordingly, at each measurement point, the edge part distance meters 10a and 10b measure the distance to the edge part of the steel plate 1, the plane part distance meters 10c and 10d measure the distance to the upper surface of the steel sheet 1, and the horizontal position detector 11a. , 11b measure the amount of horizontal displacement with respect to the piano wire 21a, and the vertical position detectors 11c, 11d measure the amount of displacement in the vertical direction with respect to the piano wire 21b, and these measured values are input to the data analysis calculation device 32. The Rukoto.

  However, as shown in FIG. 11, when the steel plate 1 does not coincide with the flow direction, that is, when the center line of the steel plate 1 is inclined with respect to the center line of the transport roller 2, each measurement point is an edge portion of the steel plate 1. And the distances from the measurement points targeted by the plane distance meters 10c and 10d are also shifted.

  In this case, the data analysis calculation device 32 obtains a constant value from the edge portion of the steel plate 1 based on the measured value of the distance to the edge portion of the steel plate 1 measured by the edge portion distance meters 10a and 10b at each measurement point. The amount of movement of each plane distance meter 10c, 10d is calculated so that each plane distance meter 10c, 10d matches the position of the target measurement point, and each servo mechanism 12a is calculated by the amount of movement. Is driven to move the plane distance meters 10c and 10d and follow the positions of the plane distance meters 10c and 10d so that the plane distance meters 10c and 10d coincide with the positions of the target measurement points. Can be made.

  As described above, the edge portion distance meters 10a and 10b, the plane portion distance meters 10c and 10d, and the horizontal position detector 11a at the respective measurement points in a state in which the respective plane portion distance meters 10c and 10d coincide with the positions of the target measurement points. , 11b and the measured values of the vertical position detectors 11c, 11d are input to the data analysis calculation device 32.

  And in the data analysis arithmetic unit 32, for each measurement point, the distance Hm to the upper surface of the steel plate 1 with the measured values of the flat surface distance meters 10c, 10d, and the measured values of the steel plate 1 with the measured values of the edge distance meters 10a, 10b The distance Wm to the edge portion, the detection value of the horizontal position detectors 11a and 11b, and the amount of deviation A2 in the horizontal direction with respect to the piano wire 21, that is, the meandering undulation of the measuring carriage 7 itself, The vertical deviation A1 with respect to the piano wire 21, that is, the vertical waviness of the measuring carriage 6 itself is calculated.

  Since the vertical deviation A1 and the horizontal deviation A2 are obtained by calculation, in the data analysis calculation device 32, as described above, the flat portion distance meters 10c and 10d are measured up to the upper surface of the steel plate 1. By calculating by subtracting the vertical shift amount A1 (the actual shift amount A1 obtained by subtracting the change amount from the shift amount A1 if there is a change amount of the shift amount A1 based on the catenary amount) from the distance Hm. The distance Hm can be obtained.

FIG. 12 illustrates a case where the gantry support column 4 is distorted by the weight of the measurement carriage 7 and the measurement carriage beam 3 is greatly bent.
Further, in the data analysis calculation device 32, as described above, the true distance is obtained by subtracting the horizontal deviation amount A2 from the distance Wm to the edge portion of the steel plate 1 measured by the edge portion distance meters 10a and 10b. Wm can be obtained.

  FIG. 13 shows the coordinates V1 obtained at each measurement point in the meantime between the imaginary linear movement line and one plane distance meter 11c by correcting the linear movement of the measuring carriage 7, that is, the vertical position detectors 11c and 11d. The true distance measurement values H1 to Hn at positions corresponding to Vn to Vn are shown as profiles.

In the profile measuring apparatus for plate-like products of this embodiment, since the three flat part distance meters 11c and 11d are used, the profile in the center in the width direction of the steel sheet 1 and both edge parts can be obtained.
Therefore, warpage, undulation, and twist of the steel plate 1 can be obtained by calculation from the data of these profiles.
Needless to say, if the number of flat surface distance meters is increased, a large number of profiles can be obtained in the width direction of the steel sheet 1, and warpage, undulation, and twist can be meticulously measured.

Here, the warp of the steel plate 1 means that the end bends upward with respect to the flat central portion of the steel plate 1 as shown in FIG. In addition, the case where it bends below is also included.
Then, in the case of warping with the end bent upward, the degree of warping is, for example, as shown in FIG. 14, the warping at the left end of the steel plate 1 is Ts / T as Ts for T at the flat center portion of the steel plate 1. The warp at the right end of the steel sheet 1 can be expressed as Bs / B as Bs / B. Since the values of Ts and Bs can be obtained by calculating the measured values of the three plane distance meters 11c and 11d, the degree of warpage can be obtained.

Here, the waviness of the steel plate 1 means that the steel plate 1 is curved in each part in the length direction as shown in FIG.
As shown in FIG. 15, the undulation on the left end side of the steel plate 1 can be expressed as Ts / T as Ts with respect to T in the flat portion of the steel plate 1. Swell can be expressed as Bs / B as Bs / B. Since the values of Ts and Bs can be obtained by calculating the measured values of the three plane distance meters 11c and 11d, the degree of warpage can be obtained.

Here, the twist of the steel plate 1 means that the end portions (top portion and bottom portion) of the steel plate 1 are bent in the width direction and the side portions are bent as shown in FIG.
The degree of twist of the steel plate 1 is, for example, as shown in FIG. 16. For the twist of the steel plate 1, the bending amount of one side with respect to the flat portion of the steel plate 1 is A, and the bending amount of the other side is B. Then, it can be expressed by the ratio of A and B. Moreover, it can represent with the angle (theta) of the side part bending with respect to the flat part of the steel plate 1. FIG. Since the ratio of A and B or the value of the angle θ can be obtained by calculating the measurement values of the three plane distance meters 11c and 11d, the degree of torsion can be obtained.

  In addition, as an output method of calculation results such as warp, swell, and twist, the shape of the profile of warp, swell, and twist can be printed at the output terminal 34, and numerical values of warp, swell, and twist can be printed as data. .

In this embodiment, for example, a CCD laser displacement sensor is used for the edge portion distance meters 10a and 10b and the plane portion distance meters 10c and 10d, but this is a distance meter using a one-dimensional light receiving element, and the measurement point is Although it is a very small point and widely used, a distance meter using a two-dimensional light receiving element can measure the entire slit-shaped width direction at the same time, and a distance meter using a one-dimensional light receiving element. It goes without saying that the present invention can also be implemented by using a distance meter using a two-dimensional light receiving element instead of.
Specific examples of the distance meter using such a two-dimensional light receiving element include a laser scan type two-dimensional displacement sensor and a two-dimensional camera.

The top view which shows the profile measurement apparatus of the plate-shaped product which concerns on embodiment of this invention. The front view which shows the profile measurement apparatus of the plate-shaped product. The side view of the measurement trolley | bogie of the profile measurement apparatus of the plate-shaped product. Explanatory drawing which shows the catenary of a piano wire. The graph which shows the amount of catenary calculated | required by calculation of the piano wire. The block diagram which shows the structure of tension control of a piano wire. The block diagram which shows the system configuration | structure of the profile measuring apparatus of the plate-shaped product. Explanatory drawing which shows the detection principle of a vertical position detector. Explanatory drawing which shows the correction method of the distance from the reference line for straight line reference | standard measurement to the surface of a to-be-measured object. Explanatory drawing which shows the state which does not follow a plane part distance meter based on the measurement result of an edge part distance meter. Explanatory drawing which shows the state which made the flat part distance meter track based on the measurement result of an edge part distance meter. Explanatory drawing which shows the bending of the beam for measurement trolleys by measurement trolley own weight. Explanatory drawing which shows the locus | trajectory after correction | amendment of a measurement trolley | bogie. Explanatory drawing which shows the curvature of a plate-shaped product. Explanatory drawing which shows the wave | undulation of a plate-shaped product. Explanatory drawing which shows the twist of a plate-shaped product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel plate (to-be-measured object), 2 Conveyance roller, 3 Beam for measuring trolley, 4 Standing column support, 5 Traveling axis, 6 Wheel, 7 Measuring trolley, 8 Traveling motor, 9 Pulse generator (PLG), 10a, 10b Edge Distance meter, 10c, 10d Planar distance meter, 11a, 11b Horizontal position detector, 11c, 11d Vertical position detector, 12a, 12b Servo mechanism, 21a, 21b Piano wire, 31 Process computer, 32 Data analysis processing unit 33 System controller, 34 Output terminal.

Claims (4)

A measuring carriage that is located above the stationary object to be measured and moves in the length direction of the object to be measured;
A truck movement amount measuring device for measuring a movement amount of the measurement truck;
A plurality of flat section distance meters that are installed on a measurement carriage and measure the distance to the surface of a stationary object to be measured;
A distance meter driving device that is installed in the measurement carriage and moves each plane unit distance meter in the width direction of the object to be measured;
A distance meter moving amount measuring device for measuring the moving amount of the flat surface distance meter from the driving amount of the distance meter driving device;
Even without least the lateral position of the measuring carriage is stretched in one horizontal, the piano wire which is tension control by measuring the tension control or tension directly by the counterweight,
A vertical position detector that is installed in a measuring carriage and detects the amount of fluctuation in the vertical direction with respect to the piano wire ;
A horizontal position detector that is installed on a measuring carriage and detects a fluctuating position in the horizontal direction with respect to the piano wire;
At least one edge part distance meter installed on the measurement carriage and measuring the distance to the edge part of the stationary object to be measured;
Each measured value of the carriage movement measuring device and a plurality of flat portions rangefinder and a vertical position detector reads in each length of the piano wire, calculates the catenary of piano wire based on its own weight and tension, the measurement Based on the value and the amount of catenary, the distance to the object to be measured at each position in the length direction of the object to be measured is corrected and calculated so as to eliminate the influence of meandering and undulation that occurs when the measuring carriage travels. An arithmetic means,
The calculating means calculates a movement amount of a plurality of flat surface area distance meters based on measurement values of an edge distance meter and a horizontal position detector, and drives the distance meter driving device based on the calculated values. Profile measuring device for plate products.   The calculation means calculates at least one or more of warpage, undulation, and twist of the measurement target object based on data on the distance to the measurement target surface at each position in the length direction of the measurement target object. The profile measuring apparatus for a plate-like product according to claim 1. The profile of a plate-like product according to claim 1 or 2, wherein the plurality of flat area distance meters are two-dimensional distance meters capable of measuring a distance of a predetermined region in the width direction of the measurement target object. Measuring device. The said distance meter drive device and the said distance meter movement amount measuring device are comprised by the servo mechanism which incorporated the movement amount measuring device, The plate-shaped product in any one of Claims 1-3 characterized by the above-mentioned. Profile measuring device.

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