JPH0749958B2 - Surface shape measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a surface shape measuring apparatus, and more particularly to a shape measuring apparatus preferably used for a joint surface of a panel which is a structural material of a building. is there.

[Prior Art] In general, a panel used as a structural material of a building has its end faces abutted with each other and bonded to each other by adhesion or the like.

By the way, in order to obtain a uniform and strong joining strength in joining such panels, it is desired that the joined panels are abutted with each other without a gap or the gap is made uniform and narrowed as much as possible. In order to achieve this, it is necessary to maintain the straightness of the joint surface of the panel within a certain range.

Therefore, in the past, the standard scale was brought into contact with the joint surface of the panel, and the straightness of the joint surface was measured by inserting a gap gauge between the scale and the panel, and the measurement result was measured. Based on this, it is carried out to judge whether the bondability of the panel is good or bad.

[Problems to be Solved by the Invention] However, the above-described conventional technique has the following problems.

That is, in order to measure the straightness of the joint surface, a gap gauge between the scale and the joint surface must be inserted, but when attempting to measure the gap accurately, a plurality of gap gauges must be sequentially replaced. However, the work becomes complicated.

Also, the range that can be measured with one gap gauge is about
The workability becomes even more complicated when applied to the measurement of the bonding surface of the panel, which is at most 10 mm and is 2000 mm.

Furthermore, as the joint surface expands, the scale also becomes longer,
Along with this, the scale easily bends, resulting in a decrease in measurement accuracy.

On the other hand, in the case of joining together by abutting against each other like the above-mentioned panel, if the lengths of the joint surfaces are different, a gap will occur at the end of the joint surface, so it is necessary to make the lengths uniform as well. The length measurement for that purpose must be performed, but this work must be performed independently of the operation of measuring the straightness of the joint surface.

Therefore, conventionally, it has been desired to deal with these problems, and the present invention is to solve the problems remaining in such conventional techniques.

[Means for Solving the Problems] The present invention is intended to provide a surface shape measuring apparatus that can effectively solve the above-mentioned problems.
In particular, a guide rail placed parallel to the surface to be inspected on a surface intersecting the surface to be inspected of the object to be measured, a reference wire stretched in parallel to the guide rail, and the guide rail in the longitudinal direction thereof. A traveling base mounted so as to be movable along the traveling base, the unevenness sensor provided integrally with the traveling base, facing the surface to be inspected, and provided at a position facing the reference wire. A correction sensor that detects relative movement in a direction orthogonal to the surface to be inspected, an end sensor that detects an end of the surface to be inspected, and a traveling sensor are provided between the traveling base and the guide rail. A drive mechanism for moving the base and a distance sensor for detecting the amount of movement of the traveling base are provided.

[Operation] In the surface shape measuring device according to the present invention, after the guide rail is installed in parallel with the surface to be inspected of the object to be measured, the traveling base is moved along the guide rail by the drive mechanism,
The unevenness sensor measures the distance between the traveling base and the surface to be inspected, and the unevenness of the surface to be inspected is measured based on the amount of change.

Further, the correction sensor measures the relative movement between the traveling base and the reference wire, and corrects the distance measurement error in the unevenness sensor due to the relative movement.

Furthermore, the edge sensor detects each edge of the surface to be inspected,
The length of the surface to be inspected is measured by detecting the amount of movement of the traveling base by the distance sensor in that area.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the drawings, reference numeral 1 indicates a surface shape measuring apparatus according to the present embodiment, and the shape measuring apparatus 1 is mounted on a surface (hereinafter referred to as a mounting surface) S of an object W which intersects a surface F to be inspected. A guide rail 2 placed parallel to the inspection surface F, a reference wire 3 stretched in parallel to the guide rail 2, and a travel attached to the guide rail 2 so as to be movable along the length direction thereof. The base 4 and the unevenness sensor 5 provided integrally with the traveling base 4 and facing the surface F to be inspected, and the reference wire 3 are provided so as to face the reference wire 3. A correction sensor 6 for detecting relative movement in a direction orthogonal to the surface F, an end sensor 7 for detecting an end of the surface F to be inspected, and the traveling base 4 and the guide rail 2 are provided. Drive mechanism (not shown) for moving the traveling base 4, and It has a schematic configuration comprising a distance sensor 9 which is parallel in mechanism for detecting the movement amount of the travel base 4.

The guide rail 2 is formed in the shape of a long flat plate, and its lower surface (the lower side is the lower side and the upper side is the upper side in FIGS. 2 and 3) is brought into contact with the mounting surface S. A plurality of supported legs 10 are vertically provided at intervals in the length direction.

Further, stays 11 project upward from both ends of the guide rail 2, and the reference wire 3 is stretched between the stays 11.

One end of this reference wire 3 is attached to one stay 11 by a fastener.
12 and the other end is connected to the other stay 11.
It is locked via the tension adjusting mechanism 13.

The tension adjusting mechanism 13 is interposed between the adjusting knob 14 rotatably and axially movable on the other stay 11, and between the adjusting knob 14 and the other end of the reference wire 3. And a tension spring (not shown). By rotating the adjustment knob 14, the tension spring is extended to give a predetermined tension to the reference wire 3, thereby keeping the reference wire 3 in a straight line state. It is supposed to do.

The traveling base 4 mounted on the guide rail 2 includes a base portion 4a arranged substantially parallel to the guide rail 2 and a measuring portion 4b vertically extending from the base portion 4a to a position facing the surface F to be inspected. The bottom surface of the base portion 4a has a second
As shown in the figure, a plurality of wheels 15 that roll on the upper surface of the guide rail 2 and a plurality of guide rollers 16 that are rollably engaged with both side edges of the guide rail 2 in the longitudinal direction.
And the correction sensor 6 is mounted on the upper surface.

In the present embodiment, a sensor using laser light is used as the unevenness sensor 5, and the unevenness is obtained by irradiating the surface F to be inspected with laser light and measuring the angle of the reflected light that varies depending on the distance of the reflecting surface. A distance L2 between the sensor 5 and the surface F to be inspected is measured.

A line sensor is used as the correction sensor 6,
It is composed of a large number of light receivers 17 arranged along the direction orthogonal to the reference wire 3 and a light projector 18 for irradiating these light receivers 17 with parallel light rays. The reference wire 3 is inserted in a non-contact state with the container 17.

The correction sensor 6 measures the distance L3 between the reference wire 3 and the reference position of the correction sensor 6 by the position of the light receiver 17 where the irradiation light from the projector 18 is blocked by the reference wire 3. Has become.

Then, the parallel light and the laser light emitted from the unevenness sensor 5 are emitted on the same plane,
The positions of both the sensors 5 and 6 and their respective irradiation directions are set.

In the present embodiment, the end sensor 7 includes a light projector 19 provided on the lower surface of the base 4a of the traveling base 4 and a light receiver 20 provided below the unevenness sensor 5 of the measuring unit 4b.
In the projector 19 and the light receiver 20, the light rays emitted by the projector 19 are shielded by the corners formed by the surface F to be inspected and the mounting surface S of the measurement object W. It is installed under the following positional relationship.

Then, the end sensor 7 is inspected at the time when the transmission and reception of light between the light projector 19 and the light receiver 20 is blocked by the corner portion of the measured object W as the traveling base 4 moves. One end of the surface F is detected, a measurement start position signal is output, and when the light is exchanged again, the other end of the surface F to be inspected is detected and a measurement end position signal is output. It is designed to output.

The distance sensor 9 is mounted on the rack 21 parallel to the lower surface of the guide rail 2 and over almost the entire length.
And the encoder 22 attached to the base 4a of the traveling base 4, and the pinion 24 integrally attached to the rotary shaft 23 of the encoder 22 and meshed with the rack 21. The pinion 24 is rotated as the vehicle travels 4, and the rotation amount of the pinion 24 is converted into an electric signal by the encoder 22 and output.

Then, based on the output signal from the encoder 22, the moving amount of the traveling base 4 is detected.

On the other hand, although the drive mechanism is not shown as described above, as a specific example thereof, an electric motor is mounted on the base portion 4a of the traveling base 4, and the pinion 24 is rotated by the electric motor. It is possible.

Further, the output signals from the respective sensors 5, 6, 7, 9 are electrically connected to the shape measuring apparatus 1 and a control unit separately provided, and the measurement results of each are input to the control unit. ing.

Next, the operation of the shape measuring apparatus 1 of the present embodiment configured as described above will be described.

First, the support leg 10 is placed on the placement surface S of the object to be measured W, the guide rail 2 is arranged in parallel with the surface F to be inspected, and
The traveling base 4 is moved to one end of the guide rail 2 and a predetermined tension is applied to the reference wire 3 by the tension adjusting mechanism 13.

In this state, the reference wire 3 is held substantially parallel to the surface F to be inspected, and the end sensor 7 is positioned so as to be displaced outward from one end of the surface F to be inspected.

As a result, the sensors 5, 6, 7 and 9 are activated, and the traveling base 4 is moved along the guide rail 2 toward the other end.

Then, at the time when the traveling base 4 is moved to a position where the unevenness sensor 5 faces the end of the surface F to be inspected,
The measurement operation is started.

That is, when the traveling base 4 is moved to the above position, the gap between the light emitter 19 and the light receiver 20 of the end sensor 7 is blocked by the measurement object W, and the end portion of the surface F to be inspected is detected. The detection signal is output to the control unit, and the unevenness sensor 5, the correction sensor 6, and the distance sensor 9 start measurement based on this signal.

Here, in the concave-convex sensor 5, the distance between the end portion of the surface F to be inspected and the concave-convex sensor 5 is determined by the angle of the reflected light that varies depending on the distance of the reflecting surface of the laser light applied to the surface F to be inspected.
L2 is measured, the correction sensor 6 measures the distance L3 between the reference point and the reference wire 3, and the distance sensor 9 detects the reference position for distance measurement.

Then, this measurement operation is continuously performed while moving the traveling base 5 along the guide rails 4 to obtain the distance
L2 and L3 are measured over the entire length of the surface F to be inspected, and this measurement operation is performed by moving the traveling base 4 to the other end of the surface F to be inspected and then measuring the end sensor 7 by the object W. It is stopped when the interruption is released.

By such a measuring operation, the unevenness state, that is, the straightness is measured over the entire length of the surface F to be inspected, and the length of the surface F to be inspected is measured.

More specifically, the distance L2 between the unevenness sensor 5 and the surface F to be inspected is continuously measured by the movement of the traveling base 4,
For example, when a convex portion is present on the surface F to be inspected, the distance L2 is measured in a reduced form, and when a concave portion is present, the distance L2 is measured in an increased form. The shape and its size are measured.

Then, since the moving position of the traveling base 4 with respect to the surface F to be inspected is measured by the distance sensor 9, the uneven position can be immediately measured by the output of the unevenness sensor 5 and the output of the distance sensor 9.

Further, as the measurement is continued, the other end of the surface F to be inspected is detected by the end sensor 7, and the signal is transmitted to the distance sensor 9
Is output to.

Based on the difference between the measured value of the distance sensor 9 and the reference value at this time, the distance between both ends of the surface F to be inspected, that is, the length of the surface F to be inspected (measurement object W) is measured.

On the other hand, if the traveling base 4 shifts with respect to the guide rail 2 during movement for some reason, the distance detection value from the unevenness sensor 5 changes even when the surface F to be inspected has no unevenness. A detection result as if the surface F to be inspected has an uneven portion is output.

However, when a deviation occurs in the traveling base 4, the deviation amount is corrected as follows, and the above-mentioned erroneous output is prevented.

That is, for example, the measurement unit 4b of the traveling base 4 is mounted on the surface F to be inspected.
If it is deviated in the direction away from (the amount of deviation is D), the distance L2 ′ detected by the unevenness sensor 5 is
The output indicates that a concave portion is present on the surface F to be inspected.

Here, the unevenness sensor 5 and the correction sensor 6 are integrally attached to the traveling base 4, the distance L1 between the reference point of the correction sensor 6 and the unevenness sensor 5 is kept constant, and the reference wire 3
Is attached to the guide rail 2 and is inserted into the correction sensor 6 in a non-contact state,
Due to the displacement of the traveling base 4, the correction sensor 7 also outputs the distance L3 ′ including the equivalent displacement amount D.

If these relationships are shown, the following equation (1) is obtained.

L3−L3 ′ = L2′−L2 = D (1) When this is modified, L2 ′ = D + L2 (2) L3 ′ = L3 + D (3)

Here, when the surface F to be inspected has no unevenness and the traveling base 4 is not displaced, the distance L4 between the reference wire 3 and the surface F to be inspected is constant. Equation (4) holds.

L2 + L3 + L4 = L1 (4) When the traveling base 4 is displaced, the following equation (5) holds.

L2 ′ + L3 ′ + L4 = L1 (5) Then, the following equation (6) is obtained from these equations (2), (3), (4) and (5).

L2 '+ L3' + L4 = D + L2 + L3-D + L4 = L2 + L3 + L4 = L1 (9) As a result, the formula (4) = (5) is obtained, and the incorrect output due to the displacement of the traveling base 4 is prevented, and the accurate output is obtained. Distance information,
That is, information on the shape of the surface shape of the surface F to be inspected can be obtained.

Further, since each of these pieces of information is obtained as an electric signal, it becomes easy to feed back to the post-processing step and accumulate and use as management information.

Furthermore, since the guide rail 2 can be set in a measurable state simply by installing it on the mounting surface S of the object to be measured W, for example, the panel can be easily incorporated in the manufacturing line.

It should be noted that the various shapes, dimensions, etc. of the respective constituent members shown in the above embodiments are merely examples, and can be variously changed based on the shapes, design requirements, etc. of the applied members.

[Effects of the Invention] As described above, the surface shape measuring device according to the present invention has the following excellent effects.

It is possible to easily and quickly detect the straightness of the surface to be inspected by continuously detecting the unevenness state of the surface to be inspected by the unevenness sensor while moving the traveling base along the surface to be inspected.

In addition, by holding the surface to be inspected and the reference wire in parallel and comparing the output from the unevenness sensor and the output from the correction sensor, erroneous output due to the displacement of the traveling base is corrected, and high-accuracy straightening is performed. Degree measurement can be performed.

Moreover, the length of the surface to be inspected can be measured by the distance sensor at the same time when the straightness is measured, and the entire shape can be easily measured.

Further, it can be set in a measurable state simply by installing it on the mounting surface of the object to be measured, the work having the surface to be inspected can be incorporated into the conveyance path, and automation can be easily applied.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a sectional view taken along the line AA of FIG.
The drawing is a view taken along the line BB in FIG. 1 ... (surface) shape measuring device, 2 ... guide rail, 3 ... reference wire, 4 ... traveling base, 5 ... unevenness sensor, 6 ... correction sensor, 7 ... end sensor, 9 …… Distance sensor, F …… Inspected surface, S …… Placement surface, W …… Measured object.

Claims (1)

[Claims] 1. A guide rail placed parallel to the surface to be inspected on a surface intersecting the surface to be inspected of the object to be measured, a reference wire stretched in parallel with the guide rail, and a length of the guide rail. A traveling base mounted so as to be movable along the vertical direction, provided integrally with the traveling base, and provided at a position opposed to the unevenness sensor facing the surface to be inspected and the reference wire, A correction sensor for detecting relative movement of the reference wire in the direction orthogonal to the surface to be inspected, and
An end sensor that detects an end of the surface to be inspected, a drive mechanism that is provided between the traveling base and the guide rail to move the traveling base, and detects a movement amount of the traveling base. For measuring the shape of the surface