JP2016170091A - Device, system, and method for measuring dimension of measurement object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement-object dimension measurement device that allows rapid and precise measurement.SOLUTION: A measurement-object dimension measurement device 20 includes: a measurement object 10 with a pair of measuring target surfaces 11 and 12 facing each other; a spindle part 21 set on the measurement object 10; a beam part 22 supported by the spindle part 21; and a pair of non-contact distance sensors 24B and 24C held by the beam part 22. The beam part 22 is rotatable in a plane intersecting with the measuring target surfaces 11 and 12 and the non-contact distance sensor 24B detects a distance to the measuring target surface 11 and the non-contact distance sensor 24C detects a distance to the measuring target surface 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for measuring dimensions of a measurement object such as a member.

  Conventionally, measuring instruments such as a measure, a micrometer, a vernier caliper, a ruler, and a tape measure are used when measuring the dimensions of a member after manufacturing at a factory or at the time of carrying in the field (for example, see Patent Document 1).

JP 2000-155001 A

Measuring instruments tend to increase in size and weight in proportion to the size of members and measurement accuracy. As measuring instruments become larger and heavier, they become difficult to handle. For example, when measuring the width dimension of a segment for shield construction having a width of 1500 mm, a caliper having a length of 2 m and a weight of 10 kg is used.
When such a long and heavy measuring instrument is used, it becomes difficult to operate the measuring instrument, so that the work takes time and the burden on the operator increases. Further, when an inclination or the like occurs in the measuring instrument, a measurement error occurs.

  The present invention has been made in view of the above-described circumstances, and provides a measurement object dimension measurement apparatus, a measurement object dimension measurement system, and a measurement object dimension measurement method capable of accurate measurement in a short time. Is an issue.

  In order to solve the above-mentioned problem, a measuring object size measuring apparatus of the present invention includes a support shaft portion installed on a measuring object having a pair of opposing measurement target surfaces, and a beam portion supported by the support shaft portion. A pair of non-contact type distance sensors held by the beam unit, and the beam unit is rotatable in a plane intersecting the pair of measurement target surfaces, and the one non-contact type distance sensor The sensor detects a distance to one of the measurement target surfaces, and the other non-contact distance sensor detects a distance to the other measurement target surface.

Here, “the plane intersecting with the pair of measurement target surfaces” includes a case where an extended surface extending from the pair of measurement target surfaces intersects with a plane.
For example, when the measurement object is a rectangle or the like and the distance between the pair of measurement object surfaces facing each other is measured as the dimension of the measurement object, the beam portion is an extension surface obtained by extending the pair of measurement object surfaces. A pair of non-contact distance sensors are provided inward so as to be opposed to each other with the measurement object sandwiched therebetween so as to be rotatable in intersecting planes.
Further, when measuring the distance between a pair of measurement target surfaces facing each other in the recess formed in the measurement object as the dimension of the measurement object, the beam portion is provided so as to be rotatable in the recess. The pair of non-contact distance sensors are provided outward so as to face the measurement target surface.

  According to such a configuration, the dimension of the measurement object can be measured by turning the pair of non-contact distance sensors in a plane intersecting with the pair of measurement target surfaces (that is, around the reference axis). Makes accurate measurement possible.

  Further, the measurement object dimension measurement system of the present invention is a pair of meter-side object surfaces of the measurement object facing each other based on detection results of the measurement object dimension measurement device and the pair of non-contact distance sensors. A measurement object size calculation unit that calculates the length of the measurement object as a dimension of the measurement object, wherein the non-contact distance sensor is a distance to the measurement object surface facing the non-contact distance sensor. Is detected.

The pair of non-contact distance sensors are opposed to each other with the measurement object interposed therebetween, and the measurement object size calculation unit sets the distance between the pair of non-contact distance sensors as A, and When the maximum values of the distances detected by the non-contact type distance sensor are B _MAX and C _MAX , respectively, and the dimension of the measurement object is X,
X = A− (B _MAX + C _MAX )
The structure of calculating the dimension of the measurement object may be used.

Further, the pair of non-contact distance sensors are opposed to each other with the measurement object interposed therebetween, and the measurement object size calculation unit sets the distance between the pair of non-contact distance sensors as A, The maximum value of the distance detected by the non-contact distance sensor is set to B _MAX, and the distance detected by the other non-contact distance sensor at the same time as B _MAX is set to C ₁ , and the measurement object When the dimension of X is X
X = A− (B _MAX + C ₁ )
The structure of calculating the dimension of the measurement object may be used.

Further, the pair of non-contact distance sensors are opposed to each other with the measurement object interposed therebetween, and the measurement object size calculation unit sets the distance between the pair of non-contact distance sensors as A, The maximum value of the distance detected by the non-contact type distance sensor is set to B _MAX , the distance detected by the other non-contact type distance sensor at the same time as B _MAX is set to C ₁ , and the other non-contact type distance sensor the maximum value of the distance detected by the contact type distance sensor and C _MAX, and the distance detected by one of the non-contact distance sensors in C _MAX at the same time as B _1, the dimension of the measurement object X
X = A− (B _MAX + C _MAX + B ₁ + C ₁ ) / 2
The structure of calculating the dimension of the measurement object may be used.

  The measuring object dimension measuring method of the present invention is a measuring object dimension measuring method using the measuring object dimension measuring system, wherein the pair of non-contact distance sensors are configured to rotate the beam portion. Detecting the distance to the measurement target surface of the measurement object facing the non-contact distance sensor, and the measurement object size calculation unit detected by the pair of non-contact distance sensors Calculating a length between a pair of measuring target surfaces facing each other of the measurement object as a dimension of the measurement object based on the distance.

  According to the present invention, it is possible to accurately measure the dimension of a measurement object in a short time.

(A) is a side view which shows the measuring object dimension measuring apparatus which concerns on embodiment of this invention, (b) is a functional block diagram which shows the measuring object dimension measuring system which concerns on embodiment of this invention. . (A) is a top view which shows the 1st operation example of a measurement object dimension measurement system, (b) (c) is a graph which shows the example of the detection result of a non-contact-type distance sensor. (A) is a top view which shows the 2nd and 3rd operation example of a measurement object dimension measurement system, (b) (c) is a graph which shows the example of the detection result of a non-contact-type distance sensor. (D) is a top view of the measurement object which shows the example of the dimension measured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. As shown in FIG. 1A, the measurement object size measurement system 1 according to the embodiment of the present invention determines the length between a pair of measurement object surfaces 11 and 12 facing the measurement object 10. It is a system that measures as the dimensions of. As shown in FIG. 1B, the measurement object dimension measurement system 1 includes a measurement object dimension measurement device 20, a measurement object dimension calculation unit 31, an input unit 32, and a notification unit 33. As shown in FIG. 1A, the measurement object member dimension measuring apparatus 20 includes a support shaft part 21, a beam part 22, an operation part 23, and a pair of non-contact distance sensors 24B and 24C. .

  The support shaft portion 21 is a turntable provided on the surface 13 that connects the pair of measurement target surfaces 11 and 12. The bottom surface of the support shaft portion 21 has a non-slip function and is installed on the surface 13 of the measurement object 10.

  The beam portion 22 holds a pair of non-contact distance sensors 24 </ b> B and 24 </ b> C, and is attached to the upper portion of the support shaft portion 21. The beam portion 22 is rotatable around a reference axis P that intersects the surface 13 (orthogonal in the present embodiment) by supporting the central portion of the beam portion 22 by the support shaft portion 21. In other words, the beam portion 22 is rotatable in a plane parallel to the surface 13. The length of the beam portion 22 is set to be longer than the dimension of the measuring object 10 to be measured. The beam portion 22 can be formed by a metal hanger rail or the like.

  The operation part 23 is a work handle attached to the upper part of the central part of the beam part 22. The operator can hold the operation unit 23 and rotate the beam unit 22 around the reference axis P.

  The pair of non-contact distance sensors 24B and 24C are respectively attached to the lower portions of the end portions of the beam portion 22. The distance between the non-contact distance sensor 24B and the reference axis P (that is, the support shaft portion 21) is equal to the distance between the non-contact distance sensor 24C and the reference axis P. As the non-contact type distance sensors 24B and 24C, various distance sensors such as a laser type can be suitably used.

One non-contact type distance sensor 24 </ b> B is directed to the center side (that is, the reference axis P) of the beam portion 22, and opposes one measurement target surface 11 of the measurement target 10. The non-contact distance sensor 24 </ b> B detects the distance B from the non-contact distance sensor 24 </ b> B to the measurement target surface 11 of the measurement object 10 and outputs the detection result to the measurement object dimension calculation unit 31.
The other non-contact type distance sensor 24 </ b> C is directed to the center side (that is, the reference axis P) of the beam portion 22, and faces the other measurement-side target surface 12 of the measurement object 10. The non-contact distance sensor 24 </ b> C detects the distance C from the non-contact distance sensor 24 </ b> C to the measurement target surface 12 of the measurement object 10, and outputs the detection result to the measurement object size calculation unit 31.

  When the spindle part 21, the beam part 22, the operation part 23, and the pair of non-contact distance sensors 24B and 24C of the measurement object dimension measuring apparatus 20 measure the dimension of a shield construction segment having a width of 1500 mm as a measurement object. It can be realized with about 3 kg, and light weight is realized.

  The measurement object size calculation unit 31 is a so-called control unit configured by a CPU, a ROM, a RAM, an input / output circuit, and the like. The measurement object dimension calculation unit 31 acquires the detection results of the non-contact distance sensors 24B and 24C, and based on the detection results, determines the length between the measurement target surfaces 11 and 12 as the dimension X of the measurement object 10. And the calculation result is output to the notification unit 33. The calculation method of the dimension X of the measurement object 10 by the measurement object dimension calculation unit 31 will be described in detail in each operation example described later.

  The input unit 32 is a keyboard, a mouse, or the like, and outputs an input result by the operator to the measurement object size calculation unit 31. The notification unit 33 is a monitor or the like, and displays the dimension X of the measurement object 10 calculated by the measurement object dimension calculation unit 31 to notify the operator.

<First operation example>
Next, an example of a method for measuring the dimension X of the measurement object 10 by the measurement object dimension measurement system 1 will be described with reference to FIGS. As shown in FIG. 2A, in the first operation example, the pair of measurement target surfaces 11 and 12 for measuring the dimensions are parallel to each other, and the surface 13 is formed on the pair of measurement target target surfaces 11 and 12, They are orthogonal to each other. The reference axis P is parallel to the pair of measurement target surfaces 11 and 12.

  First, as shown in FIG. 1A and FIG. 2A, the operator places the support shaft portion 21 of the measurement object dimension measuring device 20 at the center of the surface 13 that connects the measurement object surfaces 11 and 12. Install and determine the position of the reference axis P on the surface 13. In such a state, the non-contact distance sensor 24 </ b> B faces the measurement target surface 11, and the non-contact distance sensor 24 </ b> C faces the measurement target surface 12.

  Subsequently, the operator operates the input unit 32 to specify the start of detection by the measurement object dimension measuring device 20. Subsequently, as shown in FIG. 2A, the operator holds the operation unit 23 and rotates the beam unit 22. Here, the pair of non-contact distance sensors 24B and 24C continue to detect the distances B and C to the measurement target surfaces 11 and 12, respectively, while turning around the reference axis P, and the distances B and C as detection results are detected. C is output to the measurement object size calculation unit 31. When the rotation of the beam portion 22 by the worker is finished, the worker operates the input unit 32 to specify the end of detection by the measurement object dimension measuring device 20.

Subsequently, the measurement object size calculation unit 31 includes the maximum values B _MAX and C _{MAX of} the distances B and C detected from the detection start to the detection end, and a pair of non-contact distance sensors stored in advance. Based on the distance A between 24B and 24C, the dimension X of the measurement object 10 is calculated using the following formula (1).
X = A− (B _MAX + C _MAX ) (1)
In this operation example, the distances B and C become the maximum values B _MAX and C _{MAX at} the time t ₁ when the beam portion 22 is orthogonal to the measurement target surfaces 11 and 12 in plan view (FIGS. 2B and 2C). )reference).

<Second operation example>
Next, another example of a method for measuring the dimension X of the measurement object 10 by the measurement object dimension measurement system 1 will be described with reference to FIGS. 1 and 3 with a focus on differences from the first operation example. . In the example shown in FIG. 3A, the pair of measurement target surfaces 11 and 12 are non-parallel to each other, and the surface 13 is orthogonal to the pair of side surfaces 11 and 12 and has a trapezoidal shape. Yes. 3B and 3C show examples of changes over time in the distances B and C when the beam portion 22 is rotated clockwise in plan view. In the second operation example, the measurement object dimension calculation unit 31 can calculate dimensions X ₁ and X ₂ described later as the dimension X between the pair of measurement target surfaces 11 and 12.

That is, the measurement object size calculation unit 31 includes the maximum value B _MAX of the distance B detected between the start of detection and the end of detection, and the value C _{1 of the} distance C detected at the same time t ₂ as B _MAX. , the distance a between the pair of noncontact distance sensors 24B, 24C which is previously stored, based on the calculated dimensions X ₁ of the measurement object 10 using the following equation (2) (see FIG. 3 (b) (See (c)).
_{X 1 = A- (B MAX +} C 1) ... Equation (2)
As shown in FIG. 3 (d), the dimension X ₁ is measured from the measurement target surface 11 along the straight line passing through the reference axis P that is orthogonal to the measurement target surface 11 and that is the rotation center of the beam portion 22. This is the length to the target surface 12.

In addition, the measurement object size calculation unit 31 includes the maximum value C _MAX of the distance C detected from the detection start to the detection end, and the value B _{1 of the} distance B detected at the same time t ₃ as C _MAX. , the distance a between the pair of noncontact distance sensors 24B, 24C which is previously stored, based on the dimension X ₂ of the measurement object 10 can be calculated using the following equation (3) (Figure 3 (See (b) and (c)).
_{X 2 = A- (C MAX +} B 1) ... Equation (3)
As shown in FIG. 3D, the dimension X ₂ is measured from the measurement target surface 12 along the straight line passing through the reference axis P that is the rotation center of the beam portion 22 and orthogonal to the measurement target surface 12. This is the length to the target surface 11.

  In addition, the measurement object dimension calculation part 31 is based on a pair of non-contact type distance sensors 24B and 24C facing a pair of non-contact type distance sensors 24B and 24C based on the operation of the input part 26 by an operator. 12 can be determined.

<Third operation example>
Subsequently, still another example of the method of measuring the dimension X of the measurement object 10 by the measurement object dimension measurement system 1 will be described with reference to FIGS. 1 and 3 with a focus on differences from the second operation example. To do.

In the third operation example, the measurement object size calculation unit 31 calculates the dimension X of the measurement object 10 by obtaining the arithmetic average of the above-described dimensions X ₁ and X ₂ . That is, the measurement object size calculation unit 31 calculates the size X using the following equation (4).
_{X = A- (B MAX + C} MAX + B 1 + C 1) / 2 ... Equation (4)

  The measuring object dimension measuring apparatus 20 and the measuring object dimension measuring system 1 including the measuring object dimension measuring apparatus 20 according to the embodiment of the present invention measure the dimensions by turning the pair of non-contact distance sensors 24B and 24C around the reference axis P. Therefore, accurate measurement can be performed in a short time, and the measurement object dimension measuring apparatus 20 can be reduced in weight.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably. For example, the measurement object dimension measuring apparatus 20 may be configured to include a rotation drive unit including a motor or the like in order to rotate the beam unit 20. In the case of performing the second operation example, which maximum value of the detection results of the non-contact distance sensors 24B and 24C is used is stored in advance in the measurement object size calculation unit 31, and the maximum value It is possible to adopt a configuration in which a mark is attached to a portion in the vicinity of the sensor in which the sensor is used or the beam portion 22. The second and third operation examples can also be applied when the pair of measurement target surfaces 11 and 12 are parallel to each other as shown in FIG.

Moreover, when measuring the length between the measurement object surfaces which the recessed part formed in the measurement object 10 opposes as a dimension of the measurement object 10, the measurement object dimension measuring apparatus 20 is a non-contact-type distance sensor. 24B and 24C can be configured to face the opposite side of the reference axis P.
That is, the measuring object dimension measuring apparatus of the present invention includes a supporting shaft portion installed on a measuring object having a pair of opposing measuring object surfaces, a beam portion supported by the supporting shaft portion, and a beam portion. A pair of non-contact distance sensors to be held, and the beam portion is rotatable in a plane intersecting (preferably orthogonal) with the pair of measurement target surfaces, and one of the non-contact distance sensors. The type distance sensor detects the distance to one of the measurement target surfaces, and the other non-contact type distance sensor detects the distance to the other measurement target surface.

When measuring the length of the measurement target surface facing the concave portion of the measurement target 10 as the dimension X of the measurement target 10, when using the first operation example described above, the measurement target dimension calculation unit 31 is Based on the minimum values B _min and C _{min of} the distances B and C detected from the start of detection to the end of detection, and the distance between the pair of non-contact distance sensors 24B and 24C stored in advance, The dimension X of the measurement object 10 is calculated using Equation (5).
X = A + ( _Bmin + _Cmin ) ... Formula (5)

Further, in the case where the length of the measurement target surface facing the concave portion of the measurement target 10 is measured as the dimension X of the measurement target 10, when the second operation example described above is used, from the detection start to the detection end. The minimum value B _min of the distance B detected during the period B, the value C _{2 of the} distance C detected at the same time as B _min, and the distance A between the pair of non-contact distance sensors 24B and 24C stored in advance. If, based on the calculated dimensions X ₃ of the measurement object 10 using the following equation (6).
_{X 3 = A + (B min} + C 2) ... (6)
In addition, the measurement object size calculation unit 31 preliminarily calculates the minimum value C _min of the distance C detected from the start of detection to the end of detection, the value B _{2 of the} distance B detected at the same time as C _min , stored pair of noncontact distance sensor 24B, the distance a between the 24C, based on, it is also possible to calculate the dimensions X ₄ of the measurement object 10 using the following equation (7).
_{X 4 = A + (C min} + B 2) ... (7)

Further, in the case where the length of the measurement target surface facing the concave portion of the measurement target 10 is measured as the dimension X of the measurement target 10, when the third operation example described above is used, the measurement target dimension calculation unit 31, by determining the arithmetic mean of the dimension _X 3, _{X 4} mentioned above, to calculate the size X of the measurement object 10. That is, the measurement object size calculation unit 31 calculates the size X using the following formula (8).
_{X = A + (B min +} C min + B 2 + C 2) / 2 ... (8)

DESCRIPTION OF SYMBOLS 1 Measurement object dimension measurement system 10 Measurement object 11, 12 Meter side object surface 20 Measurement object dimension measurement apparatus 22 Beam part 24B, 24C Non-contact type distance sensor 31 Measurement object dimension calculation part P Reference axis

Claims (6)

A spindle part installed on a measurement object having a pair of measurement object surfaces facing each other;
A beam portion supported by the support shaft portion;
A pair of non-contact distance sensors held by the beam;
With
The beam portion is rotatable in a plane intersecting the pair of measurement target surfaces,
One of the non-contact distance sensors detects a distance to one of the measurement target surfaces, and the other non-contact distance sensor detects a distance to the other measurement target surface. Measuring object dimension measuring device. A measurement object size measuring apparatus according to claim 1;
Based on the detection results of the pair of non-contact distance sensors, a measurement object size calculation unit that calculates the length between the pair of measuring target surfaces facing the measurement object as the dimensions of the measurement object; ,
With
The said non-contact type distance sensor detects the distance to the said measurement object surface facing the said non-contact type distance sensor. The measuring object dimension measuring system characterized by the above-mentioned. The pair of non-contact distance sensors are opposed to each other with the measurement object interposed therebetween,
The measurement object size calculation unit sets A as the distance between the pair of non-contact distance sensors, and B _MAX and C _MAX as the maximum values of the distances detected by the pair of non-contact distance sensors, respectively. When the dimension of the measurement object is X,
X = A− (B _MAX + C _MAX )
The measurement object dimension measurement system according to claim 2, wherein a dimension of the measurement object is calculated by: The pair of non-contact distance sensors are opposed to each other with the measurement object interposed therebetween,
The measurement object dimension calculation unit, the pair of the distance between the noncontact distance sensor is A, and the maximum value of said distance detected by one of the non-contact type distance sensor and B _MAX, and B _MAX when the distance in the same time is detected by the other of said noncontact distance sensor as the C _1, the dimension of the measurement object was X,
X = A− (B _MAX + C ₁ )
The measurement object dimension measurement system according to claim 2, wherein a dimension of the measurement object is calculated by: The pair of non-contact distance sensors are opposed to each other with the measurement object interposed therebetween,
The measurement object dimension calculation unit, the pair of the distance between the noncontact distance sensor is A, and the maximum value of said distance detected by one of the non-contact type distance sensor and B _MAX, and B _MAX said distance detected at the same time by the other of said noncontact distance sensor as the C _1, the maximum value of said distance detected by the other of said noncontact distance sensor and C _MAX, the C _MAX at the same time said distance detected by one of the noncontact distance sensor as B _1, when the dimension of the measurement object was X,
X = A− (B _MAX + C _MAX + B ₁ + C ₁ ) / 2
The measurement object dimension measurement system according to claim 2, wherein a dimension of the measurement object is calculated by: A measuring object dimension measuring method using the measuring object dimension measuring system according to claim 2,
The pair of non-contact distance sensors each detecting a distance to the measurement target surface of the measurement object facing the non-contact distance sensor while rotating the beam portion;
Based on the distance detected by the pair of non-contact distance sensors, the measurement object size calculation unit calculates a length between the pair of measuring target surfaces facing the measurement object. Calculating the dimensions of the object;
A method for measuring a dimension of an object to be measured.

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