JPH11325842A - Method and apparatus for measuring shape of long material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure an arbitrary outside diameter of a long material and the bent state of the whole shape together. SOLUTION: A beam section 3 fixes both ends of a pipe to be measured 100 detachably. A sensor 8 outputs measured information for calculating its shape, by providing at least two sets of laser measuring apparatuses composed of laser beam projectors and laser beam detectors which move in the longitudinal direction of the pipe 100. A sensor position measuring section measures the position of the sensor 8 and outputs position information. A calculating section calculates and outputs the shape of the pipe on the basis of the position information and the measured information obtained by the sensor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the shape of a long object which determines the shape of the long object such as the outer diameter and the bent state of the long object.

[0002]

2. Description of the Related Art Conventionally, a method for measuring the outer diameter of a long object is disclosed in Japanese Patent Application Laid-Open No. 2-62901. The outer diameter was measured by reading the positional relationship between the two tracing styluses. In this case, there is a problem that the long object is deformed by the force of pressing the probe, and the value becomes different from the actual outer diameter.

[0003] When the outer diameter of a long object is continuously measured in the longitudinal direction, the long object is moved while pressing a probe, or It is necessary to remove the measuring element each time, change the measuring position and press the measuring element again, and there is a risk of damaging a long object, and the measurement is troublesome.

In the non-contact method, Japanese Patent Laid-Open No. 4-34
As disclosed in Japanese Patent Application Laid-Open No. 8208, a laser sensor projector is arranged on both sides of a long object, and the outer diameter is calculated from the amount of laser light unobstructed by the long object. In the case of using a laser sensor having a wide measurement width, which can measure only a long object having an outer diameter smaller than the measurement width, there has been a problem that the apparatus becomes expensive.

In the measurement of the bending of a long object, the long object is measured vertically in order to prevent the bending of the long object due to the influence of gravity, but it is not easy to mount the apparatus on a device. Was. Further, when measuring the bending of a long object at a plurality of angles in the circumferential direction, it is necessary to mount the sensors by the number of angles that need to be measured.

[0006]

By the way, in the prior art, the thickness of the long object is limited in the case where the outer diameter of the long object can be easily measured. Also, it was difficult to attach a long object to the device. Also, regarding the measurement of the bending of a long object, when measuring the bending of a long object at a plurality of circumferential angles, the number of sensors according to the angle required for measurement had to be attached, so the apparatus was required. Was complicated and expensive. Further, it has been difficult to measure the outer diameter and the bending of a long object at the same time with the conventional apparatus.

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for measuring the shape of a long object, which can easily and easily measure the outer diameter and the bending of a long object having an arbitrary thickness. Aim.

[0008]

According to a first aspect of the present invention, there is provided a long object shape measuring apparatus for measuring the shape of a long object such as an outer diameter and a bend. And at least two sets of laser measuring devices including a laser projector and a laser light receiving device are provided, and one of the laser measuring devices is provided on one side of an outer peripheral wall orthogonal to the axial direction of the long object to be measured. While the position is adjusted so that the laser beam path is formed, the other laser measuring device is adjusted so that the other laser beam path is formed on the other end side opposite to one end side of the outer peripheral wall of the long object to be measured. Outputs measurement information for calculating the shape from the positional relationship between the one laser measuring device and the other laser measuring device adjusted for each position, the received light amount of one laser receiving device, and the received light amount of the other laser receiving device. And a guide rail provided on the fixed part A driving unit that moves the sensor unit installed on the object in the longitudinal direction of the long object to be measured, a sensor position measurement unit that measures the position of the sensor unit and outputs position information, and a sensor unit that is output by the sensor position measurement unit. And a calculating unit for calculating and outputting the shape of the long object to be measured based on the positional information and the measurement information obtained by the sensor unit. According to this means, both ends of the long object to be measured are fixed to the fixed portion, the sensor unit is moved to an arbitrary position along the longitudinal direction of the long object to be measured, and the position is output as position information. Is done. Then, at each position in the longitudinal direction of the long object to be measured by the sensor unit, measurement information for measuring the outer diameter by the laser measuring device is obtained. The obtained measurement information and position information are calculated by the calculation unit and output as an outer diameter or a bent state. This makes it possible to simultaneously measure the arbitrary outer diameter of the long object to be measured or the bending state of the entire shape as necessary.

According to a second aspect of the present invention, in the long object shape measuring apparatus according to the first aspect, the sensor portion is formed by a first laser measuring device including a first laser light receiving device facing the first laser light emitting device. Each positional relationship is adjusted so that the first optical path is formed perpendicular to the axial direction of the long object to be measured and toward the end of the first outer peripheral wall of the long object to be measured, and the first optical path faces the second laser projector. A second optical path formed by a second laser measuring device composed of a second laser light receiver that is parallel to the first optical path and facing the first outer peripheral wall end side of the long object to be measured. A sensor distance adjusting unit for adjusting each positional relationship so as to be formed on the side, a first laser light amount from the first laser light receiver after the position adjustment, and a second laser light amount from the second laser light receiver after the position adjustment And a first laser measuring device obtained by the sensor distance adjustment unit and a second Is obtained so as to output the distance information between the laser measuring instrument. According to this means, the positional relationship between the first laser measuring device and the second laser measuring device can be arbitrarily adjusted by the adjusting mechanism, and the first optical path and the second optical path are adjusted according to the outer diameter of the long object to be measured. Since it can be changed, it can be applied to a long object to be measured having an arbitrary outer diameter, and the outer diameter can be measured in a non-contact manner by using a laser measuring device.

According to a third aspect of the present invention, in the long object shape measuring apparatus according to the first aspect, the fixing portion fixes the axis of the long object to be measured with respect to the sensor portion in a state where the long object to be measured is fixed. Is provided with a mechanism capable of rotating around the center.
According to this means, since the object to be measured can be rotated to an arbitrary angle with respect to the fixed sensor unit around the axis of the object to be measured, an arbitrary shape of the object to be measured can be measured with a small number of sensors, For each position in the longitudinal direction of the long object to be measured,
The shape including the outer diameter around the circumference can be measured. As a result, it is no longer necessary to arrange a large number of sensors around the circumference as in the related art.

According to a fourth aspect of the present invention, in the long object shape measuring apparatus according to the first aspect, the fixing portion is freely rotatable about a substantially center of the entire length in the longitudinal direction of the long object to be measured. The long object to be measured is tilted to the rotating position so that the shape of the long object to be measured can be measured. According to this means, since the fixing portion for fixing the long object to be measured is at an arbitrary rotation position, and the long object to be measured can be arbitrarily tilted,
The deflection of the long object to be measured at an arbitrary inclination can be measured, and the mounting of the long object to be measured can be facilitated by setting the fixing portion in the horizontal direction.

According to a fifth aspect of the present invention, there is provided the long object shape measuring apparatus according to the first aspect, wherein the guide rail of the drive unit moves the sensor unit in the axial direction of the long object to be measured. A traveling path correction jig for measuring the resulting bending of the traveling path is provided, and the measurement information obtained by the sensor unit is corrected by the obtained bending of the traveling path to correct the outer diameter or the bending. According to this means, the sensor section moves along the longitudinal direction of the long object to be measured, and the bending of the traveling path resulting from the diameter of the guide rail used when measuring the shape at each position is measured, and from the sensor section The obtained measurement information is corrected. As a result, accurate measurement information that is not affected by the distortion of the guide rail is obtained, and the bending state of the long object to be measured becomes more accurate and reliable.

According to a sixth aspect of the present invention, in the long object shape measuring method for measuring the shape of a long object, one of the laser measuring devices formed by one of the laser projector and the opposite laser light receiver is formed. Adjust each positional relationship so that the optical path is formed perpendicular to the axial direction of the long object to be measured and on one end of the outer peripheral wall of the long object to be measured, and the other laser facing the other laser projector The other optical path formed by the other laser measuring device composed of the photodetector is orthogonal to the axial direction of the long object to be measured, and the other outer periphery facing one outer peripheral wall end side of the long object to be measured. Adjust each positional relationship so that it is formed on the wall end side, and after adjusting each positional relationship, the positional relationship between one laser measuring device, the other laser measuring device, and the long object to be measured, and the amount of light received by one laser receiver And the other laser receiver By the over The light receiver is obtained so as to measure the outer diameter of the measured long product. According to this means, the arbitrary relationship between the one laser measuring device and the other laser measuring device can be arbitrarily changed, so that an arbitrary outer diameter of the long object to be measured can be measured.

According to a seventh aspect of the present invention, in the long object shape side measuring method for measuring the shape of a long object, one of the laser measuring devices formed by one of the laser projector and the opposing laser light receiver is used. The optical path is orthogonal to the axial direction of the long object to be measured, and the respective positional relationships are adjusted so as to be formed on one end of the outer peripheral wall of the long object to be measured, and the other is opposed to the other laser projector. The other optical path formed by the other laser measuring device composed of the laser light receiver and the other optical path orthogonal to the axial direction of the long object to be measured, and facing the outer peripheral wall end side of one of the long objects to be measured. Adjust each positional relationship so that it is formed on the outer peripheral wall end side, and after adjusting each positional relationship, the positional relationship between one laser measuring device, the other laser measuring device, and the object to be measured, and the amount of light received by one laser light receiving device. Measurement data based on the amount of light received by the other laser receiver Are collected for each position in the axial direction of the long object to be measured, and the measured length obtained from each measurement data at each position in the axial direction of the long object to be measured is collected. By comparing the external shape of the long object and the reference shape of the long object to be measured, the amount of displacement at each position in the axial direction of the long object to be measured is obtained, and the bending state of the long object to be measured is measured. Things. According to this means, the outer diameter at an arbitrary position in the longitudinal direction of the long object to be measured and the bent state in the longitudinal direction of the long object to be measured can be measured together, which is efficient.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic external view of a long object shape measuring device according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of the long object shape measuring device.

In the figure, a long object shape measuring apparatus has a box-shaped frame 1 serving as a mount, a bottom surface 1a of which is set on the ground A, and a box-shaped frame 2 which is fixed on an opposing upper surface 1b. A beam portion 3 having a vertically long shape is attached to a distal end of a beam rotating shaft 14 provided to extend forward from a front surface 2 a of the frame 2.

The beam section 3 is configured such that a moving end 4 is provided above a front surface 3a and a fixed end 5 is provided at a lower end to fix the tube to be measured 100 up and down. Then, the measured pipe 1
2 to cover the entire length so as to be parallel to 00
Rails 7 for guiding the books are installed in the left, right, up and down directions of the pipe 100 to be measured, and a sensor 8 for measuring the outer diameter of the pipe 100 to be measured can be moved on these rails 7 in the pipe axis direction of the pipe 100 to be measured. It is erected.

That is, the sensor 8 includes a belt 10 provided in parallel with one of the rails 7 on the beam section 3, which is hung by pulleys 11 provided vertically, and the belt 10 is rotated by a sensor moving motor 9 provided below. Move up and down,
The sensor 8 is correspondingly movable in the tube axis direction of the measured tube 100.

A beam section rotation motor 6 is mounted on the side surface 2b of the frame 2 behind the beam section 3 so that the entire beam section 3 can be arbitrarily rotated. The beam portion 3 is transmitted to a beam rotating shaft 14 via a worm gear (not shown) provided therein, and the beam portion 3 is rotated in the direction of the arrow F or in the opposite direction about the point E in FIG. With this configuration, it is possible to measure the bending of the measured tube 100 in an arbitrary inclined state, and if the beam unit 3 is horizontal, the mounting of the measured tube 100 is facilitated. The output of the sensor 8 and the output of the sensor moving motor 9 are calculated by
To the display unit 13.

As shown in FIG. 3 as viewed from the front in FIG. 2, the moving end 4 has a moving end fixing member 15 suspended on a rail 7 installed on the beam portion 3. It can be moved in any direction. A fixed lever 16 and a tube stator 17 are attached to the moving end fixture 15, and
The tube to be measured 100 is attached by pressing the tube stator 17 against one end of the tube 100.

The fixing lever 16 is formed as a screw as shown in FIG. 4 as viewed from the direction B in FIG. 3, and the fixing lever 16 is turned and pressed against the beam portion 3 to fix the moving end 4. I have. With this configuration, it is possible to move the moving end 4 and attach the measured pipe 100 having an arbitrary length to the long object shape measuring device.

Further, as shown in FIG. 5 as viewed from the direction C--C in FIG. 4, the inside of the movable end 4 has a cylindrical portion 1 of the movable end fixture 15.
The push 18 is fitted into the inside of the pusher 5 a by the push fixture 19, the shaft portion 17 b of the tube stator 17 is fitted inside the push 18, and the fixed shaft 21 is attached via the spring 20.

With this configuration, the pipe stator 17 can be moved in the direction of the arrow I (up and down direction).
8, when the tube 100 to be measured is mounted, the tube end of the tube 100 to be measured is pressed by the spring 20 downwardly to push the tube end of the tube stator 17 to the head 17a of the tube stator 17. Mounted by

On the other hand, the fixed end 5 is formed on a fixture 24 having a support portion 24a attached so as to protrude forward from the beam portion 3, as shown in FIG. A convex lower portion 23a of the tube rotor 23 is fitted through the bearing 25 in correspondence with the concave receiving portion 24b.
c, the shaft 22a of the tube rotation motor 22
Is fixed to the lower portion 23a of the tube rotor 23. The peripheral edge 23c of the head 23b of the tube rotor 23 supports the tube end of the measured tube 100.

With this configuration, the tube to be measured 100 can be rotated about the central axis of the tube to be measured 100 together with the tube rotator 23 by driving the tube rotation motor 22. The tube rotation motor 22 is a pulse motor, and can measure the outer diameter of the measured tube 100 at an arbitrary circumferential angle.

FIG. 7 is a diagram showing the vicinity of the side of the sensor 8 as viewed from the direction G in FIG. 2, and FIG. 8 is a diagram showing the internal structure of the sensor 8 as viewed from above the sensor 8.

In the figure, a sensor fixing portion 28 is installed so as to protrude forward from a part of two rails 7 attached to the beam portion 3, and a gear 26 and the gear 26 are provided on the upper surface side of the sensor fixing portion 28. A tooth 38a formed on the side surface of the sensor 8 so as to mesh with the sensor 38, and the shaft of the gear 26 is provided on the lower surface side of the sensor fixing portion 28.
The sensor rotation motor 27 is mounted so as to communicate with the sensor.

Thus, the sensor 8 rotates around the central axis of the measured tube 100 by driving the sensor rotating motor 27, and can measure the outer diameter of the measured tube 100 at an arbitrary angle in the circumferential direction. .

As shown in FIG. 8, the sensor 8 has teeth 38a formed on the outer peripheral wall of a disk-shaped base 38, a through hole 38b through which a tube to be measured 100 passes, and a top surface of the base 38. Is equipped with a distance adjusting mechanism 39 described later.

That is, the distance adjusting mechanism 39 is
8, pulleys 34a-34 supporting the belt 35, which is hung around the tube to be measured 100, so as to be moved.
34g, a distance adjusting knob 36 is provided at one end of the belt 35, and when the distance adjusting knob 36 is rotated, the belt 35 illustrated is freely movable. Then, the fixing portion 35a of the belt 35 and the support 30d of the distance measuring device 37a are fixed, and the distance measuring device 37a is fixed.
The support 31d and the fixing part 35b are fixed so that the light projector 30b and the light projector 31b of the distance measuring device 37a can arbitrarily adjust the gap S according to the movement of the belt 35.

Similarly, the support 32 of the distance measuring device 37b
d is fixed by the fixing portion 35c of the belt 35,
3d is fixed by the fixing portion 35d of the belt 35, and the belt 3
5, the gap S between the light projector 32b and the light projector 33b can be arbitrarily adjusted.

Further, a support 30c having a light receiver 30a is fixed to a fixing portion 35e of the belt 35 at a position facing the light projector 30b and the light projector 31b on the left side in the figure, and a support 31c having the light receiver 31a is fixed to the fixing portion 35f. The fixing portion 35 of the belt 35 at a position facing the light projector 32b and the light projector 33b of the lower distance measuring device 37b in the figure.
g, a support 32c having a light receiver 32a is fixed,
A support 33c having a light receiver 33a is fixed to the fixing portion 35h.

When the distance adjusting knob 36 is rotated by the sensor distance adjusting mechanism 39, each light emitter and each light receiver are moved without displacement by the movement of the belt 35, and the interval between the laser sensors forming a pair is changed. Can be spaced. The paired laser sensors are arranged on the outer diameter of the tube to be measured 100 such that the amount of laser light is blocked by about half. Thus, it is possible to cope with a difference in the outer diameter of the measured tube 100 only by rotating the distance adjustment knob 36.

In FIG. 8 having the above configuration, when the distance adjustment knob 36 is turned by the sensor distance adjustment mechanism 39,
One set of projector 30b, one set of projector 31b and one set of projector 32
The distance between b and each set of the light projector 33b changes. Then, as shown in FIG. 8, half of the amount of laser light from the light projector 30b is received by the opposing light receiver 30a. In addition, floodlight 3
Half of the amount of laser light from 1b is received by the opposing light receiver 31a. Further, each interval is adjusted such that half of the laser light amount from the light projector 33b is received by the opposing light receiver 33a, and half of the laser light amount from the light emitter 32b is received by the opposing light receiver 32a.

As a result, the distance L between one set of the light projector 30b and the light projector 31b is measured from the distance measuring device 37a, and the calculation unit 12 calculates the distance L between the light receiver 30a and the light receiver 31a based on the amount of laser light received. The diameter is calculated by the following equation (1).

Outer diameter (D) = L−LZ ₁ −LZ ₂ (1) where L: distance between light emitter 30 b and light emitter 31 b LZ ₁ : light receiving width of light receiver 30 a LZ ₂ : light receiving width of light receiver 31 a Light receiving width

Similarly, the light projector 32b and the light projector 33b
The outer diameter is determined by the calculation unit 12 from the distance between the two and the light reception amounts of the light receivers 32a and 33a.

Next, the sensor 8 described above is connected to the pipe 100 to be measured.
The sensor movement motor 9 for moving along the tube axis direction of
As shown in FIG. 9 as viewed from the direction 1-1 in FIG. 2, the beam is fixed to the beam unit 3 by the motor fixture 40, and the operation of the sensor moving motor 9 is transmitted from the gear 41 to the gear 42 and transmitted to the encoder 43 and the pulley 44. . By the rotation of the pulley 44, the sensor 8 attached to the belt 10 causes the pipe 1 to be measured.
00, and the movement is detected by the encoder 43 and output to the calculation unit 12 as position information.

Next, a second embodiment of the present invention will be described with reference to FIGS.

The second embodiment is different from the long object shape measuring apparatus of the first embodiment in that there is provided a travel path correcting jig 50 for correcting a deviation of a measured value of a bending caused by meandering of the traveling rail 7 of the sensor 8. It has the feature of accurately calculating the bending of a long object that is not affected by rail distortion.

FIG. 10 is a side view of the traveling route correction jig, FIG. 11 is an external view, and FIG. 12 is a sectional view taken along line AA of FIG.

The traveling route correcting jig 50 is provided with a predetermined tension in the vertical direction centering on the wire 51 on the annular lower fixing portion 50b. The guide portion 50c and the guide portion 50d each having an L-shaped cross section support the wire 51. The wire 51, the guide portion 50c, and the guide portion 50d are attached to the upper fixing portion 50a at the upper end, and the lower fixing portion 50b is provided with the guide 53 interposed with the screw 54 through which the lower end of the wire 51 passes. , Guide 5
The screw 55 provided in the third guide hole is used to tighten the screw 55 from the outside of the guide 53 with the nut 52.

First, the wire 51 is stretched with a constant tension, and a straight line reference for the traveling route of the sensor 8 is created. To apply tension to the wire 51, the nut 52 is turned inside. Although the guide 53 is also on the inside at the same time, a repulsive force is generated by the screw 54, the screw 55 is pushed outward together with the nut 52, and the wire 51 attached to the screw 55 is also pushed outward at the same time, generating tension.

Next, the traveling path correcting jig 50 described above is inserted into a circular through hole 38b formed in the base 38 of the sensor 8 as described with reference to FIG. I do. Then, as shown in FIG.
5, the light emitter 31b is fixed to the fixing part 35b of the belt 35, and the light receiver 31a is fixed to the fixing part 35f of the belt 35, and the light emitter 33b is fixed to the fixing part 35d of the belt 35. It is fixed to the fixing part 35h.
When the preparation is completed, the distance adjustment knob 36 is turned so that the center of the laser beam from one of the projectors 31b becomes substantially the center of the wire 51. Thus, the laser beam is received by the light receiver 31a, and the center of the laser beam from the other projector 33b is adjusted so as to be substantially the center of the wire 51. In this state, the sensor 8 is connected to the wire 5
The laser light is moved up and down along the entire length of the end from one end, and the amount of each laser beam received by the light receiver 33a and the light receiver 31a is measured and stored.

As described above, the position of the laser sensor is adjusted so that the center of the laser beam is substantially at the center of the wire 51, and only one laser beam of the paired laser sensors is
So that Then, a change in the amount of laser light cut off from end to end of the wire 51 of the travel path correction jig 50 is checked, and the change in the value is regarded as a distortion of the rail 7, and the correction value at the time of measuring the bending of the pipe 100 to be measured is used I do. This allows
The pipe under test 100 is accurately measured without being affected by the distortion of the rail 7.
Can be calculated.

Next, a description will be given of a method for measuring the bending of the measured pipe according to the third embodiment of the present invention.

In FIG. 14, as shown in FIG. 8, the light receiver 30a and the light receiver 31b are composed of the light projector 30b and the light projector 31b.
a, and the measured value obtained by the above-described adjustment is adjusted in a direction (vertical axis) perpendicular to 0 to n (horizontal axis) in the direction of the tube axis of the tube 100 to be measured. And the state in the vertical direction.

First, as shown in FIG. 14, virtual center lines connecting the centers of the outer diameters obtained by the above equation (1) are created at both ends of the pipe 100 to be measured. Specifically, the left end of the illustrated tube is positioned at the center position V _RL
Is calculated by equation (2).

V _RL = {L− (LZ ₁₀ + LZ ₂₀ )} / 2 + LZ ₂₀ (2) where L: sensor distance LZ ₁₀ : 0 The light receiving amount width of the light receiver 30a at the position of LZ ₂₀ : 0 Light receiving width of the light receiver 31a

The center position V _{RR at the} right end of the illustrated tube is calculated by equation (3).

V _RR = {L− (LZ _1n + LZ _2n )} / 2 + LZ _1n (3) where L: sensor distance LZ _1n : light receiving amount width of light receiver 30a at position n LZ _2n : position n Light receiving width of the light receiver 31a

The obtained pipe left end is connected to a center position V _RL and the pipe right end to a center position V _RR by a straight line to form a virtual center line.

Subsequently, the pipe 1 to be measured with a predetermined reference
00 of radius D _0/2 of the cylinder drawn around the imaginary center line to create a cylindrical reference tube. Next, the inclination correction amount epsilon _x at point x for the X-axis is calculated by the following equation (4).

Ε _x = {(V _RR −V _RL ) / n} · x (4)

Further, the displacement σ _1x of the x point by the light projector 30b is calculated by the following equation (5).

Σ _1x = V _RL −LZ _1x −D ₀ / 2−ε _x (5)

Similarly, the displacement σ _1x of the x point by the light projector 31b is calculated by the following equation (6).

[0059] _{σ 2x = (L-V RL} ) -LZ 2x -D 0/2 + ε x ... (6)

The outer diameter D _{y at the} point y on the x axis is given by the following equation (7).
Is required.

D _y = L−LZ _1y −LZ _2y (7)

Thus, if the displacement of each point is obtained,
A bending curve with the center axis between the centers of the diameters at both ends of the measured tube 100 is obtained. Further, according to this method, it is possible to measure the bend even if the pipe to be measured 100 is inclined and not parallel to the traveling rail 7 of the sensor 8. Further, the shape of the entirety of the measured pipe 100 can be obtained by obtaining the bending at each measurement angle.

[0063]

As described above, according to the first aspect of the present invention, both ends of an arbitrary long object to be measured are fixed, and the sensor section is located at an arbitrary position along the longitudinal direction of the long object to be measured. The position is output as position information, and at each position in the longitudinal direction of the long object to be measured by the sensor unit, measurement information for measuring the outer diameter by the laser measuring device is obtained, and the obtained measurement information is obtained. And the position information is output as an outer diameter or a bent state. This makes it possible to simultaneously measure the arbitrary outer diameter of the long object to be measured or the bending state of the entire shape as necessary.

Further, according to the second aspect of the invention, the positional relationship between the first laser measuring device and the second laser measuring device can be arbitrarily adjusted by the adjusting mechanism, and the first optical path and the second optical path can be measured in a long length. Since it can be changed according to the outer diameter of the object, it can be applied to a long object to be measured having an arbitrary outer diameter, and the outer diameter can be measured in a non-contact manner by using a laser measuring device.

According to the third aspect of the present invention, since the object to be measured can be rotated at an arbitrary angle with respect to the fixed sensor portion around the object to be measured, the sensor can be freely adjusted with a small number of sensors. The shape around the circumference of the long object to be measured can be measured, and the shape including the outer diameter around the circumference can be measured at each position in the longitudinal direction of the long object to be measured. Is gone.

According to the fourth aspect of the present invention, since the fixing portion for fixing the long object to be measured can be arbitrarily rotated and the long object to be measured can be arbitrarily tilted. The bending of the long object to be measured can be measured, and the mounting of the long object to be measured can be facilitated by setting the fixing portion in the horizontal direction.

According to the fifth aspect of the present invention, the sensor section moves along the longitudinal direction of the long object to be measured, and the bending of the traveling path caused by the diameter of the rail used when measuring the shape at each position. Is measured to correct the measurement information obtained from the sensor section, accurate measurement information not affected by the distortion of the rail is obtained, and the bending state of the long object to be measured becomes more accurate and reliable.

According to the sixth aspect of the present invention, the arbitrary relationship between one laser measuring device and the other laser measuring device can be arbitrarily changed, so that an arbitrary outer diameter of a long object to be measured can be measured.

According to the seventh aspect of the present invention, the outer diameter of the long object to be measured at an arbitrary position in the longitudinal direction and the bent state of the long object to be measured in the longitudinal direction can be measured together. is there.

[Brief description of the drawings]

FIG. 1 is a schematic external view of a long object shape measuring apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic front view of the long object shape measuring device of FIG. 1;

3 is a front view of a moving end provided in the long object shape measuring device of FIG. 2;

FIG. 4 is a diagram showing a moving end as viewed from the direction of arrow B in FIG. 3;

FIG. 5 is a sectional view taken along the line CC in FIG. 4;

FIG. 6 is a sectional view taken along the line DD in FIG. 2;

FIG. 7 is a side view as viewed from a direction G in FIG. 2;

FIG. 8 is a structural diagram of a sensor unit of FIG. 7;

9 is a view showing a sensor moving motor and the like provided in the long object shape measuring device in FIG. 2;

FIG. 10 is a side view of a traveling route correction jig showing a state of a second embodiment of the present invention.

FIG. 11 is a partial external view of a traveling route correction jig showing a state of a second embodiment of the present invention.

FIG. 12 is a sectional view taken along line AA of FIG. 10;

FIG. 13 is an operation diagram of a traveling route correction jig showing a state of a second embodiment of the present invention.

FIG. 14 is an explanatory diagram for measuring a bend from measurement data according to the third embodiment of the present invention.

[Explanation of symbols]

 1, 2 Frame 3 Beam section 4 Moving end 5 Fixed end 6 Beam section rotating motor 7 Rail 8 Sensor 9 Sensor moving motor 10, 35 Belt 11 Pulley 12 Calculation section 13 Display section 14 Beam rotation axis 15 Moving end fixing tool 16 Fixed lever 17 Pipe Stator 18 Push 19 Push Fixture 20 Spring 21 Fixed Shaft 22 Pipe Rotation Motor 23 Tube Rotator 24 Fixture 25 Bearing 26 Gear 27 Sensor Rotation Motor 28 Sensor Fixing Section 36 Distance Adjusting Knob 37 Distance Measuring Instrument 38 Base 39 Distance Adjustment mechanism 40 Motor fixture 43 Encoder 50 Travel path correction jig 51 Wire 52 Nut 53 Guide 55 Screw 100 Tube to be measured

Claims (7)

[Claims] 1. A long object shape measuring device for measuring the shape of a long object such as an outer diameter and a bend, comprising: a fixing portion for detachably fixing both ends of a long object to be measured; a laser projector and a laser receiver; At least two sets of laser measuring devices are provided, and one of the laser measuring devices is positioned so that one laser light path is formed at one end of an outer peripheral wall orthogonal to the axial direction of the long object to be measured. On the other hand, the position of the other laser measuring device is adjusted such that the other laser light path is formed on the other end side of the outer peripheral wall of the long object to be measured opposite to the one end side, and the respective position adjustments are performed. A sensor unit that outputs measurement information for calculating a shape from a positional relationship between one laser measuring device and the other laser measuring device, a light receiving amount of one laser light receiving device, and a light receiving amount of the other laser light receiving device, On the guide rail provided on the fixed part A driving unit that moves the sensor unit in the longitudinal direction of the long object to be measured, a sensor position measurement unit that measures the position of the sensor unit and outputs position information, and a sensor unit that is output by the sensor position measurement unit. A long object shape measuring device, comprising: a calculating unit that calculates and outputs the shape of the long object to be measured based on positional information obtained by the sensor unit and measurement information obtained by the sensor unit. 2. The sensor section is configured so that a first optical path formed by a first laser measuring device including a first laser light receiver facing a first laser projector is orthogonal to an axial direction of the long object to be measured. In addition, the positional relationship is adjusted so as to be formed on the first outer peripheral wall end side of the long object to be measured, and the second laser measuring device including the second laser light receiving device facing the second laser light emitting device is used. The respective positional relations are adjusted so that the second optical path to be formed is formed on the second outer peripheral wall end side opposite to the first outer peripheral wall end side of the long object to be measured, in parallel with the first optical path. A sensor distance adjusting unit, a first laser light amount from the first laser light receiver after the position adjustment, a second laser light amount from the second laser light receiver after the position adjustment, and the sensor distance adjusting unit. First
The long object shape measuring device according to claim 1, wherein distance information between the laser measuring device and the second laser measuring device is output. 3. The fixed section includes a mechanism that is rotatable about the axis of the long object to be measured with respect to the sensor section in a state where the long object to be measured is fixed. The long object shape measuring device according to claim 1. 4. The fixed portion is configured to be rotatable about a substantially central portion of the entire length of the long object to be measured in the longitudinal direction, and to incline the long object to be measured to an arbitrary rotating position to thereby measure the length of the long object to be measured. The long object shape measuring device according to claim 1, wherein the shape of the object can be measured. 5. A traveling path correcting jig for measuring a bending of a traveling path caused by distortion of the guide rail when the sensor section is moved in the axial direction of the long object to be measured by the guide rail of the driving section, The measurement information obtained by the sensor unit is corrected by the bending of the obtained traveling route, and the outer diameter,
Alternatively, the bending is corrected.
The long object shape measuring device described in the above. 6. A long object shape measuring method for measuring the shape of a long object, wherein one optical path formed by one laser measuring device comprising one laser projector and an opposing laser light receiver is measured by a length to be measured. The respective positional relationships are adjusted to be perpendicular to the axial direction of the measuring object and to be formed on one end of the outer peripheral wall of the measuring object, and the other laser light emitting device and the other laser light receiving device facing each other are adjusted. The other optical path formed by the other laser measuring device is perpendicular to the axial direction of the long object to be measured, and the other outer peripheral wall facing the one outer peripheral wall end side of the long object to be measured. Adjust each positional relationship so that it is formed on the end side, and after adjusting each positional relationship, the positional relationship between one laser measuring device, the other laser measuring device, and the long object to be measured, and the light reception of one laser light receiving device Amount and the amount of light received by the other laser receiver. And measuring the outer diameter of the long object to be measured with the other laser receiver. 7. A long object shape side measuring method for measuring the shape of a long object, wherein one optical path formed by one laser measuring device comprising one laser projector and an opposite laser light receiving device is connected to the optical path. The other laser receiver opposite to the other laser projector is adjusted so as to be perpendicular to the axial direction of the long object to be measured and to be formed on one end of the outer peripheral wall of the long object to be measured. The other optical path formed by the other laser measuring device consisting of: the other optical path that is orthogonal to the axial direction of the long object to be measured, and that faces the outer peripheral wall end side of the one long object to be measured. After adjusting the positional relationship, the positional relationship between one of the laser measuring devices, the other laser measuring device, and the object to be measured, and the light receiving of one of the laser light receiving devices is adjusted after the positional relationship adjustment. Amount and the amount of light received by the other laser receiver The measurement data is collected at each position in the axial direction of the long object to be measured, and the measurement data is collected from each measurement data at each position in the axial direction of the long object to be measured. The external shape of the long object to be measured is compared with the reference shape of the long object to be measured to determine the amount of displacement at each position in the axial direction of the long object to be measured. A method for measuring the shape of a long object, comprising measuring a bent state.