JP2018066718A - Distance measurement device, and distance measurement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a length measurement device and length measurement method in which in a distance measurement among parallel columns such as facilities, an objective is that the distance measurement has general versatility, is excellent in repeatability, has objectivity, and further makes highly accurate measurements, and which realize these objectives.SOLUTION: A distance measurement among parallel columns can be simply made by: a length measurement unit (a length measurement step) that is arranged in at least one end of a supporting member on a linear reference axis, scans an in-plane including at least the reference axis, and contactlessly measures a distance among measurement object planes; a length measurement angle measurement device (a length measurement angle measurement step) that measures an angle formed by a direction where a measurement is made and the reference axis; and computation (a computation step) of the distance among the measurement object planes from the distance measured by the length measurement unit (the length measurement step), the angle measured by length measurement angle measurement device (the length measurement angle measurement step), and a length between either end of the supporting member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a distance measuring device and a distance measuring method for measuring a distance between parallel columns such as equipment. In particular, it can be effectively applied when measuring the distance between planes facing in parallel in order to check the deformation of the equipment, which is important for the maintenance inspection of the equipment in a large equipment such as a rolling mill.

  It is an important factor to check the deformation of the equipment for the maintenance inspection of the equipment. In particular, the deformation of the housing of a large facility is directly linked to the accuracy of the product produced by the facility. Usually, the housing is often constituted by parallel columnar portions, and the distance between the parallel columns is measured for checking maintenance for the maintenance.

  As an example, a steel mill rolling mill shown in FIG. 4 will be taken up. The housing 21 of the rolling mill is constituted by parallel columns having a square cross section. Both ends of the auxiliary roll 23 and work roll 24 are supported by chocks (bearings) 22 and 25, and the auxiliary roll chock 22 and work roll chock 25 are supported by the housing 21 of the rolling mill to receive a strong rolling load. . In FIG. 4, the work roll chock 25 has a structure that is supported by the housing 21 via work roll / chock support surfaces 26, 26 ′, and the auxiliary roll chock 22 has an auxiliary roll / chock support surface 27. , 27 ′, it is supported by the housing 21. However, if the work roll / chock support surfaces 26, 26 ′ and the auxiliary roll / chock support surfaces 27, 27 ′ are deformed, the backlash between the housing 21 and the chock 22, 25 increases, and the shape and dimensions of the steel plate to be manufactured are increased. Not only greatly affects the accuracy (rolling accuracy), but also significantly affects rolling operations such as meandering. Therefore, the distance between the parallel columns facing the housing (between the roll / chock support surface and the support surface) is grasped, and the work roll / chock support surfaces 26, 26 ′ and the auxiliary roll / chock support surface 27.27 ′ are obtained. Maintenance work to correct is very important.

  Measurement of the distance between parallel columns (hereinafter simply referred to as parallel columns) having mutually parallel planes, such as a rolling mill housing, is performed using a metal tape measure (scale) or a dial gauge. Has been done. As a measuring device, for example, a length measuring device in which a dial gauge or a micrometer is arranged at one end has been proposed. This is called an inside micrometer as an apparatus for measuring the inner diameter of a steel pipe or between parallel surfaces, and an apparatus and method for measuring with high accuracy have been proposed (for example, Patent Document 1).

Utility Model Registration No. 3045593 JP 2014-240083 A

  At the site of equipment maintenance and inspection, piping and the like are arranged, and not only are they forced to work in very narrow spaces, but they are also subject to time constraints. In such an environment, measurement with a dial gauge, a micrometer, or the like is artificially performed by selecting a measurement location or reading a scale, so that reproducibility is poor and accurate measurement cannot be performed. Furthermore, in the measurement between parallel columns such as a rolling mill housing, the conventional measurement method using a dial gauge, etc., must make sensual judgments such as contact condition and relies on the operator's sense and skill. there were. As a result, there is a problem that individual differences among workers occur and measurement reproducibility and objectivity cannot be obtained.

As a method of fixing the measurement position and eliminating variations between workers, for example, a housing liner surface (for example, the chock support surface 26 in FIG. 4) disposed on the reference surface side and the opposite side of the reference surface. A method of measuring a distance from a reference surface is provided, with a recess provided on the housing liner surface (for example, the chock support surface 26 ′ in FIG. 4 corresponds to that) and a bottom of the recess as a measurement fixing point. (Patent Document 2). However, it is not practical to install liners at all measurement points, and it is usually not possible to perform measurements at any location for equipment maintenance. It is limited to be used for inspection.
Thus, measuring the distance between parallel columns having planes facing each other in parallel means that the distance from any point in the plane of one column to the plane of the other column (the plane to be measured) It is the same as measuring.

  Therefore, the present invention has versatility and reproducibility in measuring the distance between parallel columns having planes facing each other in parallel and the distance from an arbitrary point to the plane to be measured (measurement plane). Therefore, the objective is to obtain a length measuring device and a length measuring method that embody it, with the objective of measuring it with good objectivity and high accuracy.

In order to solve the above-mentioned problems, the present inventors have intensively studied and obtained the following knowledge.
(A) In measurement of a dial gauge or the like, the operator must judge the contact condition, and thus depends on the sensuality of the operator. In order to eliminate this, the idea was to perform the measurement itself by non-contact measurement. Non-contact measurement refers to, for example, irradiating an ultrasonic wave or a laser, capturing a reflected wave from the measurement object, and measuring a distance from the measurement object (hereinafter sometimes simply referred to as an object). (Hereinafter, a device capable of measuring a distance in a non-contact manner is simply referred to as a length measuring device in this specification). In the present invention, the portions directly related to the distance measurement are a length measuring unit that measures the distance in a non-contact manner and a support member that supports the length measuring unit. The aspect of the length measuring unit is not particularly limited, but is generally a length measuring device that scans a laser or the like and measures the length without contact (hereinafter, the length measuring unit may be simply referred to as a length measuring device). ).

(B) The distance from an arbitrary point to the plane needs to be measured on a line perpendicular to the plane to be measured, but it is difficult to measure while confirming the vertical in a realistic work environment. . Also, as described in Patent Document 2, it is not practical to install a measurement liner as described above, and lacks versatility. Therefore, in order to solve these problems, the present inventors adopted a minimum value among distances measured by scanning ultrasonic waves, lasers, etc. in non-contact measurement, such as parallel columns. It was found that the distance between objects placed in parallel can be grasped.

  In an actual measurement site, an operator searches for the shortest distance while moving the length measuring device. Considering the operation, the scanning function of the length measuring device itself may be at least a two-dimensional scan. That is, while the length measuring device itself performs two-dimensional (plane) scanning, the operator moves the length measuring device so that it is substantially perpendicular to the plane scanned by the length measuring device, so that three-dimensional (three-dimensional space) scanning is performed. This is because the shortest distance between objects can be measured. This makes it possible to obtain objective measurement values that are versatile and have good reproducibility.

(C) In order to measure with higher accuracy, it is desirable that the length measuring device and the object be as close as possible. For this reason, the distance between a target object and a length measuring device can be shortened by using the supporting member according to the distance between target objects, and arrange | positioning a length measuring device in the end. At that time, by matching the basic axis of the length measuring device scan with the reference axis of the support member, the angle between the scan direction and the reference axis is used, and the other end of the support member (as opposed to the arrangement of the length measurement unit). It has been found that the distance between the side edge) and the object can be obtained geometrically. That is, the distance from an arbitrary point to the plane to be measured can be measured.

  The basic axis of the measuring instrument scan is a straight line that forms the center of the scan plane or scan space. It is important that the scanning direction is grasped at an angle formed with this basic axis. For example, in the case of two-dimensional (planar) scanning (FIG. 2A), if the axis that is the center of the center angle 8 of the sector to be scanned and has the same angle from both ends of the scan range is the basic axis 9 Good. Similarly, in the case of a three-dimensional (three-dimensional space) (FIG. 2B), the axis that is the center of the conical center angle to be scanned and has the same angle from any generatrix on the cone is the basic axis 9. It is good to make it.

  The reference axis of the support member refers to a straight line connecting both ends of the support member. In other words, both ends of the support member are arranged on the linear reference axis. When the support member 4 is linear, the central axis of the support member is the reference axis 2 (FIG. 3A). When the support member 4 is not linear, the center axis of the support member 4 and the reference axis 2 do not necessarily coincide with each other, but the reference axis 2 is uniquely determined because the straight line connecting both ends is the reference axis 2 (FIG. 3 ( b)). When the support member 4 branches in a branch shape or the like and has three or more end portions, a straight line connecting the end portion where the length measuring device 3 is arranged and the end portion 5 serving as a reference point for distance measurement is the reference axis 2. (FIG. 3C). Thus, even when the support member has three or more end portions, the end portion where the length measuring device 3 is arranged and the end portion 5 which is a reference for distance measurement (sometimes referred to as a measurement reference point) are convenient. Are referred to as both ends.

The length measuring device may be disposed at one end of the support member, or may be disposed at both ends.
When the length measuring device is arranged at one end of the support member (when arranged at only one end), the reference point for distance measurement by the length measuring device becomes the other end of the support member (measurement reference point 5 in FIG. 3). . The distance from the measurement reference point to the target surface is calculated sequentially from the distance measured by the length measuring instrument, the angle from the basic axis at that time, and the length of the support member, and the minimum value obtained is taken as the distance. be able to. The measurement may be performed by bringing the other end (measurement reference point) where the length measuring device is not placed into contact with one object. Since it is only necessary to make contact, it is not necessary to judge the contact state based on the operator's sensation unlike the conventional inside micrometer. Therefore, since there is no difference between workers, the reproducibility of the measurement is increased, the measurement variation is less likely to occur, and the objectivity can be obtained.

  When the length measuring device is arranged at both ends of the support member, the distance to the plane facing each length measuring device is measured with each length measuring device, and the angle from the basic axis (that is, the reference axis) at that time, The distance between the two planes can be measured by sequential calculation from the length of the support member. In this case, the end opposite to the end of the support member on which the length measuring device is disposed may be used as a reference point for distance measurement by the length measuring device. In this case, the distances measured by the respective length measuring devices may be added together, and the minimum value obtained by correcting the overlapping of the support member lengths may be set as the distance between the target planes. Further, for example, an arbitrary point on the reference axis may be used as a reference point for distance measurement of each length measuring device. In this case, the distance from the reference point of the distance measurement of each length measuring device to the target surface is sequentially calculated, and the distance between the target planes can be obtained by adding the minimum values of the respective distances. In any case, since there are length measuring devices at both ends of the support member, the measurement is performed without contact with the target plane. Therefore, as in the case where a length measuring device is arranged at one end, it is not necessary to judge the contact condition based on the operator's sensation, the reproducibility of the measurement is increased, measurement variations are less likely to occur, and objectivity can be obtained. it can.

  When measuring, it is desirable to measure perpendicular to the object plane. Therefore, a guide device (jig) may be provided so that the measuring device can move in a plane perpendicular to the target plane. For example, when the length measuring device is disposed at one end of the support member, a guide device may be provided at the other end (measurement reference point). For example, in the case where the length measuring devices are arranged at both ends, a guide device in which the central portion of the support member is the center of rotation, or a guide device in which the support member can move (tilt) in the same plane may be provided.

The shorter the scan cycle (the time from scanning to the next scanning), the higher the measurement accuracy. For example, 1000 scans per second (a scan cycle of 0.001 seconds) may be used, but 10,000 scans per second increases the probability of matching the scan direction corresponding to the shortest distance. Increases accuracy.
About measurement accuracy, what is necessary is just to use an apparatus with high measurement accuracy as needed. In general, the measurement accuracy is low when the scan range is wide, and the measurement accuracy is high when the scan range is narrow. Select a length measuring device so that the required measurement accuracy can be obtained. And it is good to be able to adjust the length of a supporting member so that expansion and contraction is possible, and to be able to select a measurement range.
In addition, invariant steel (for example, Fe-Ni 36% steel (Invar alloy)) may be used so that the length of the support member does not change depending on the temperature at the time of measurement.

(D) At the actual measurement site, the operator may monitor the measured distance sequentially, and may grasp the minimum value as the shortest distance, but use a storage device to store the measured data and store the minimum value. It is desirable to make a judgment and display it. For example, in the measurement, if the minimum value is not updated for a certain period (several seconds to several tens of seconds), the operator can be notified that the shortest distance has already been grasped, and the measurement can be terminated. By using such an interface, the load on the operator can be reduced.

This invention is made | formed based on the said knowledge, The summary is as follows.
(1)
A distance measuring device for measuring a distance to a plane to be measured, a support member having both ends on a linear reference axis, and at least one end of the support member, and in a plane including at least the reference axis Measuring the distance between the measurement target plane and the measuring axis, and measuring the angle formed by the reference axis and the direction measured along with the length measuring section. An angle measurement unit, a calculation unit that calculates a distance to the measurement target plane, and a display unit that displays a result calculated by the calculation unit,
The calculation unit calculates the distance to the measurement target plane from the distance measured by the length measurement unit, the angle measured by the measurement angle measurement unit, and the length between both ends of the support member, Distance measuring device.
(2)
The length measurement unit is disposed at one end of the support member, and the calculation unit is a measurement reference point that is an end opposite to an end of the support member on which the length measurement unit is disposed, and the measurement The distance measuring device according to (1), wherein the distance to the target plane is calculated.
(3)
The distance measuring device according to (1), wherein the length measuring units are arranged at both ends of the support member, and the calculating unit calculates a distance between the measurement target planes.
(4)
Among the distances obtained while the length measurement unit performs one scan, the calculation unit scans the minimum value di and the measurement direction and the reference axis obtained by the measurement angle measurement unit. And a length L between both ends of the support member, and the following formula 1,
A distance Di between the measurement reference point and the measurement target plane is obtained, and a minimum value of Di obtained by the length measurement unit during measurement is set as a distance between the measurement reference point and the measurement target plane. (2) The distance measuring device according to (2).
Di = di + L · cos (θi) (Equation 1)
(5)
The calculation unit obtains the minimum value di among the distances obtained while the length measurement unit provided at one end of the support member performs one scan, and the length measurement angle measurement unit at the one end. A measurement angle θi formed by the measurement direction and the reference axis when scanning the minimum value di,
A distance Li from the fixed point on the reference axis of the support member to one end of the support member when the length measuring unit measures by fixing one point on the reference axis of the support member When,
Among the distances obtained while the length measuring unit provided at the other end of the support member performs one scan, the minimum value dj and the minimum value obtained by the length measuring angle measuring unit at the other end. a measurement angle θj formed by a measurement direction and a reference axis when dj is scanned;
The distance Lj from the fixed point on the reference axis of the support member to the other end of the support member, and the fixed point on the reference axis of the support member and the measurement object from the following formulas 2 and 3 The distances Di and Dj with respect to the plane are obtained, and the length measuring unit sums the minimum value of Di and the minimum value of Dj obtained during measurement.
The distance measuring device according to (3), wherein the distance between the measurement target planes is set.
Di = di + Li · cos (θi) (Equation 2)
Dj = dj + Lj · cos (θj) (Equation 3)
(6)
The calculation unit obtains the minimum value di among the distances obtained while the length measurement unit provided at one end of the support member performs one scan, and the length measurement angle measurement unit at the one end. And the distance obtained during one scan of the length measuring portion θi formed by the measurement direction and the reference axis when the minimum value di is scanned and the other end of the support member. , The measurement angle θj formed by the measurement direction when the minimum value dj is scanned and the reference axis, obtained by the measurement angle measurement unit at the other end, and the support member From the length L between both ends and the following formula 4,
The distance Dk between the measurement target planes is obtained, and when the planes scanned by the length measuring units arranged at both ends are in the same plane, the minimum value of Dk obtained by the length measuring unit during measurement is calculated. The distance measuring device according to (3), wherein the distance between the measurement target planes is set.
Dk = di + dj + (L · cos (θi) + L · cos (θj)) / 2 (Expression 4)
(7)
The distance measuring device according to (2) or (4), further comprising a guide device that allows the support member to rotate in the same plane around the measurement reference point.
(8)
The distance measuring device according to (3) or (5), further comprising a guide device that allows the support member to rotate in the same plane around one point on the reference axis of the support member. .
(9)
The distance measuring device according to (3) or (6), further comprising a guide device that allows the support member to tilt in the same plane.
(10)
The distance measurement according to any one of (7) to (9), wherein the same plane when the support member rotates or tilts and a plane scanned by the length measuring unit are perpendicular to each other. apparatus.
(11)
The measurement reference point is on one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the measurement target plane is the other liner surface. The distance measuring device according to any one of (2), (4), and (7), which is characterized.
(12)
One of the measurement target planes is one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the other measurement target plane is the other liner surface. The distance measuring device according to any one of (3), (5), (6), (8), and (9).
(13)
The distance measuring device according to any one of (1) to (12), wherein a level is disposed on the support member in parallel with the reference axis.
(14)
The distance measuring device according to any one of (1) to (13), wherein the length measuring unit measures using an ultrasonic wave or a laser.
(15)
A storage unit that stores the distance obtained by the calculation unit; and a minimum value determination unit that determines a minimum value of the stored distances, and the obtained minimum value is displayed on the display unit. The distance measuring device according to any one of (1) to (14).
(16)
The distance measuring device according to any one of (1) to (15), wherein the support member is made of invariant steel.
(17)
The distance measuring device according to any one of (1) to (16), wherein the support member is adjustable in expansion and contraction in the reference axis direction.
(18)
The distance measuring device according to any one of (1) to (17), wherein a scan cycle of the length measuring unit is 0.001 second or less.
(19)
A distance measurement method for measuring a distance to a plane to be measured, wherein at least one end of a support member having both ends on a linear reference axis is scanned while scanning at least the plane including the reference axis. A length measuring step for measuring the distance between the flat surface in a non-contact manner, a length measuring angle measuring step for measuring an angle formed by a direction measured along with the length measuring step and the reference axis, and the measurement A calculation step for calculating the distance to the target plane; and a display step for displaying the result calculated in the calculation step,
The calculating step calculates a distance to the measurement target plane from the distance measured in the length measuring step, the angle measured in the length measuring angle measuring step, and the length between both ends of the support member. How to measure distance.
(20)
The length measurement step measures the distance between the measurement target plane at one end of the support member in a non-contact manner,
The distance measuring method according to (19), wherein the calculating step calculates a distance between a measurement reference point which is the other end of the support member and the measurement target plane.
(21)
The length measuring step measures the distance between the measurement target planes at each end of the support member in a non-contact manner,
The distance measuring method according to (19), wherein the calculating step calculates a distance between the measurement target planes.
(22)
Among the distances obtained during one scan in the length measurement step, the calculation step is the minimum value di, and the measurement direction and the reference axis obtained when the minimum value di is scanned in the length measurement angle measurement step. And a length L between both ends of the support member, and the following formula 1,
A distance Di between the measurement reference point and the measurement target plane is obtained, and a minimum value of Di obtained during the measurement by the measurement step is set as a distance between the measurement reference point and the measurement target plane. The distance measuring method according to (20), which is characterized.
Di = di + L · cos (θi) (Equation 1)
(23)
The calculation step is obtained by the minimum value di among the distances obtained during one scan in the length measurement step at one end of the support member and the length measurement angle measurement step at the one end. , The measurement angle θi formed by the measurement direction and the reference axis when scanning the minimum value di,
A distance Li from the fixed point on the reference axis of the support member to one end of the support member when one point on the reference axis of the support member is fixed and measured in the length measuring step When,
Among the distances obtained during one scan in the length measuring step at the other end of the support member, the minimum value dj obtained in the length measuring angle measuring step at the other end Measurement angle θj formed by the measurement direction and the reference axis when scanned,
The distance Lj from the fixed point on the reference axis of the support member to the other end of the support member, and the fixed point on the reference axis of the support member and the measurement object from the following formulas 2 and 3 The distances Di and Dj with respect to the plane are obtained, and the sum of the minimum value of Di and the minimum value of Dj obtained during the measurement in the length measurement step,
The distance measurement method according to (21), wherein the distance between the measurement target planes is set.
Di = di + Li · cos (θi) (Equation 2)
Dj = dj + Lj · cos (θj) (Equation 3)
(24)
The calculation step is obtained by the minimum value di among the distances obtained during one scan in the length measurement step at one end of the support member and the length measurement angle measurement step at the one end. , The measurement angle θi formed by the measurement direction and the reference axis when the minimum value di is scanned, and the minimum distance among the distances obtained during one scan in the measurement step at the other end of the support member The value dj, the measurement angle θj formed by the measurement direction when the minimum value dj is scanned and the reference axis, obtained in the measurement angle measurement step at the other end, and between both ends of the support member From the length L of the
The distance Dk between the measurement target planes is obtained, and when the planes to be scanned in the length measurement steps at both ends are in the same plane, the minimum value of Dk obtained during the measurement in the length measurement step is determined as the measurement target. The distance measuring method according to (21), wherein the distance between the planes is set.
Dk = di + dj + (L · cos (θi) + L · cos (θj)) / 2 (Expression 4)
(25)
The support member rotates in the same plane around the measurement reference point by a guide device that allows the support member to rotate in the same plane around the measurement reference point (20 ) Or the distance measuring method according to (22).
(26)
With the guide device that allows the support member to rotate within the same plane around one point on the reference axis of the support member, the support member is centered on one point on the reference axis of the support member. The distance measuring method according to (21) or (23), wherein the distance is rotated in the same plane.
(27)
The distance measuring method according to (21) or (24), wherein the support member is tilted in the same plane by a guide device that allows the support member to tilt in the same plane.
(28)
The distance measurement according to any one of (25) to (27), wherein the same plane when the support member rotates or tilts and a plane scanned in the length measurement step are perpendicular to each other. Method.
(29)
The measurement reference point is on one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the measurement target plane is the other liner surface. The distance measuring method according to any one of (20), (22), and (25).
(30)
One of the measurement target planes is one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the other measurement target plane is the other liner surface. The distance measuring method according to any one of (21), (23), (24), (26), and (27), characterized in that:
(31)
The support member is moved by a leveler arranged on the support member in parallel with the reference axis so that one end thereof is at least from the upper side in the vertical direction or the lower side in the vertical direction relative to the other end. (19) The distance measuring method according to any one of (19) to (30).
(32)
The distance measuring method according to any one of (19) to (31), wherein the length measuring step uses ultrasonic waves or a laser.
(33)
A storage step for storing the distance obtained by the calculation step; and a minimum value determination step for determining a minimum value among the stored distances, wherein the minimum value obtained by the display step is displayed. The distance measuring method according to any one of (19) to (32).
(34)
The distance measuring method according to any one of (19) to (33), wherein the support member is made of invariant steel.
(35)
The distance measuring method according to any one of (19) to (34), wherein the support member is adjustable in expansion and contraction in the reference axis direction.
(36)
(19) The distance measuring method according to any one of (19) to (35), wherein a scan cycle in the length measuring step is 0.001 second or less.

  According to the present invention, the distance between parallel columns having planes opposed in parallel to each other and the distance between any point and the plane are versatile, reproducible, and objectively measured with high accuracy. can do.

FIG. 1 is a conceptual diagram illustrating an example of the present invention, and is a conceptual diagram illustrating a method of measuring a distance between parallelly opposed surfaces by arranging a length measuring device at one end of a support member. FIG. 2 is a conceptual diagram illustrating the basic axis of the length measuring device. FIG. 2A shows a case of two-dimensional (planar) scanning, and FIG. 2B shows a case of three-dimensional (stereoscopic space) scanning. FIG. 3 is a conceptual diagram illustrating the reference axis of the support member. 3A shows a case where the support member is linear, FIG. 3B shows a case where the support member is not linear, and FIG. 3C shows a case where the support member has three or more ends. . It is a conceptual diagram which shows one example of the rolling mill for iron manufacture. It is a conceptual diagram which shows the state of the measurement operation | work by the measuring apparatus which concerns on this invention. Fig.5 (a) is a conceptual diagram which shows the case where it measures only one direction with the measuring apparatus which concerns on this invention. FIG. 5B is a conceptual diagram showing a case in which an arbitrary parallel plane facing is scanned and measured by shaking the measurement apparatus according to the present invention in a direction substantially perpendicular to the scan plane. FIG. 6 is a diagram for explaining a distance calculation method in the state of measurement work by the measurement apparatus according to the present invention. FIG. 6A is a conceptual diagram showing a state in which the scan plane and the measurement target plane are substantially perpendicular. FIG. 6B is a diagram for explaining a distance calculation method at that time. FIG. 7 is a conceptual diagram showing an example of a guide device that can rotate the measurement device around the measurement reference point (the other end) as an example of the guide device in the measurement device according to the present invention when a length measuring device is arranged at one end. It is. FIG. 8 is a conceptual diagram showing an example of the present invention, and is a conceptual diagram showing an example of a measurement method when length measuring devices are arranged at both ends of the support member. FIG. 9 is a conceptual diagram showing an example of the present invention, and is a conceptual diagram showing an example of a measuring method centered on one point on the reference axis when a length measuring device is arranged at both ends of the support member. is there. FIG. 10 is a conceptual diagram showing an example of a guide device that can rotate the measuring device around one point on a support member as an example of a guide device in the measuring device according to the present invention when length measuring devices are arranged at both ends. . FIG. 11 is also a conceptual diagram showing an example of a guide device that can tilt the measuring device in the same plane as an example of the guide device in the measuring device according to the present invention when length measuring devices are arranged at both ends.

  The present invention will be described with reference to the drawings.

[Plane to be measured]
The object of measurement of the present invention is the distance between an arbitrary point and a plane and the distance between parallel planes, and the shape of the object is not particularly limited as long as the object to be measured has a plane. (Hereinafter, the plane to be measured may be referred to as the measurement plane). The cross-sectional shape of the measurement object having a plane may be a polygon such as a quadrangle or a hexagon, or a part of the object may have a plane. That is, if an arbitrary point is on a plane and the plane is parallel to the plane of the object, the distance between both planes can be measured.

  For example, measurement of the distance between the columns of the apparatus, the distance between the columns of the building, the distance between the columns and the wall surface, and the like can be targeted. Normally, the cross-sectional shapes of these columns and pillars are often rectangular, and there are many cases where each object has flat surfaces facing each other in parallel. For example, in the rolling mill for iron making shown in FIG. 4, the rolling mill housing 21 is composed of columnar objects having a quadrangular cross section, and the respective columnar objects are parallel to each other and have planes facing each other in parallel. For example, the work roll / chock support surfaces 26, 26 ′ and the auxiliary roll / chock support surfaces 27, 27 ′ of FIG. Therefore, if the distance between the opposing planes is measured, the distance between the opposing columnar objects of the housing can be measured. The present invention measures the distance between two planes facing in parallel by measuring the distance between an arbitrary point on one plane and the other plane even in such planes facing parallel to each other. be able to.

[Supporting member having both ends on a linear reference axis]
As described above, in the present invention, the portions directly related to the distance measurement are the length measuring unit that measures the distance in a non-contact manner and the support member that supports the length measuring unit. There are no particular limitations on the length measuring section, but in general, it is often a measuring instrument that scans a laser and measures the length in a non-contact manner (as described above, the length measuring section is simply called a length measuring instrument). There is.) It is important that the basic axis when the length measuring device scans and the reference axis passing through one end and one end of the support member are arranged on the same straight line. Hereinafter, in the present invention, the support member has a rod shape, and the reference axis (for example, the reference axis 2 in FIG. 1) is arranged so as to be collinear with the basic axis (for example, the basic axis 9 in FIG. 1). A case will be described as an example. When the reference axis of the support member and the basic axis of the length measuring device cannot be arranged on the same line, it can be dealt with by measuring in advance the angle formed by both axes and correcting it by calculation from the geometric relationship.

First, an example in which a length measuring device is arranged at one end of the measuring apparatus according to the present invention as shown in FIG. 1 will be mainly described. The support member 4 only needs to have both ends 3 and 5 on the reference shaft 2, and the shape of the support member itself is not particularly limited. Although the support member 4 shown in FIG. 1 is linear, the support member is not particularly limited to a linear shape.
Further, the shape of the support member may be a shape having three or more ends, such as three or four. Two of them need only be on a linear reference axis. Even in a shape having three or more end portions, in the present invention, the two end portions on the reference axis are targeted, and the other end portions are ignored in the present invention.

[Length measuring section and length measuring step]
It is the apparatus and step that form the core of the present invention.
The length measuring unit 3 (length measuring step) includes a length measuring device arranged at at least one end of the support member, and has a function of measuring the distance from the length measuring device to the object. In other words, the length measurement unit 3 (length measurement step) has a function of measuring the distance from one end of the support member 4 to the measurement target plane 10. The length measuring unit may be disposed only at one end of the support member, or may be disposed at both ends. Even when the length measuring units are arranged at both ends, the functions of the respective length measuring units are the same.

  FIG. 1 shows a case where a distance between parallel columns (parallelly opposed surfaces) 7 and 7 ′ is measured using a measuring device 1 according to the present invention having a length measuring unit 3 at one end of a support member 4. It is a conceptual diagram when it sees from the substantially perpendicular | vertical direction with respect to the scanning plane 6 which the length measuring part 3 scans. FIG. 1 shows a case where the plane of one parallel column 7 is the measurement target plane 10.

  The distance measurement by the length measuring device is not particularly limited as long as it is non-contact. Higher directivity is desirable in relation to accuracy. Therefore, a length measuring method using a sound wave type such as an ultrasonic wave or an optical type such as a laser is desirable. The actual length measurement method may be any method that calculates the distance by the time until the ultrasonic wave or laser is reflected by the object and the reflection is captured. Hereinafter, the present invention will be described with reference to laser measurement. When using ultrasonic waves, the laser may be read as ultrasonic waves.

  The length measuring device may scan at least on a plane including the reference axis. (In this specification, this plane to be scanned is referred to as a scan plane 6.) A length on an intersection line (straight line) between the scan plane 6 and the measurement target plane 10 is measured. The scan plane is triangular due to the relationship with the measurement target plane 10 (for example, the scan plane 6 in FIGS. 1 and 2A). The center angle 8 of the scan plane is not particularly limited. That is, the distance measurement range and the scan width on the object are not particularly limited. For example, in the case of Keyence's LJ-V7080 type, the distance measurement range is set to 80 ± 23 mm, while the scan width is set to 32 ± 7 mm. In the case of the company's LJ-V7200 type, the distance measurement range is The scan width is set to 62 ± 11 mm for 200 ± 48 mm. What is necessary is just to set according to the characteristic of each length measuring device.

  The scan may be a three-dimensional space including a reference axis (in this specification, the space to be scanned is referred to as a scan space). In this case, scanning is performed in a conical shape (in some cases, on a quadrangular pyramid, a truncated cone shape, or a truncated pyramid shape) (scan space 6 ″ in FIG. 2B). It is sufficient that the reference axis is included in the scan space, and it is preferable that the reference axis coincides with the center line of the cone. Then, it is preferable that the center line of the cone and the reference axis of the support member coincide with the basic axis 9 of the length measuring device. The conical center angle is not particularly limited. What is necessary is just to set according to the characteristic of each length measuring device.

  It is desirable that the scan cycle be 0.001 second or less for both planar scanning and stereoscopic scanning. This is because, as will be described later, a sufficiently high scanning speed is required for the speed at which the operator moves the support member in the measurement work. The scan cycle is preferably a short time, preferably 0.0001 seconds or less, more preferably 0.00001 seconds or less.

  Regarding the measurement accuracy, it is preferable that the measurement range can be selected by adjusting the length of the support member so that the required measurement accuracy can be obtained. In addition, invariant steel (for example, Fe-Ni 36% steel (Invar alloy)) may be used so that the length of the support member does not change depending on the temperature at the time of measurement.

[Measurement angle measurement unit and measurement angle measurement step]
The length measuring device oscillates the laser in one direction (also called irradiation) and captures the reflected wave to obtain the distance. Measurement is performed while changing the laser oscillation direction. The angle formed between the oscillation direction and the reference axis is defined as a “measurement angle” in this specification. The measurement angle measurement unit (measurement angle measurement step) has a function of measuring the measurement angle. The specific means (method) for measuring the measurement angle is not particularly limited. Any means may be used as long as the angle of the laser oscillation direction and the reference axis during scanning can be grasped. From this point of view, in the case of a scan plane that is a two-dimensional measurement, a straight line that bisects the central angle of the triangular scan plane is used as the basic axis of a length measuring instrument that changes the direction in which the object is measured. The basic axis (for example, the basic axis 9 in FIG. 1) of the length measuring device and the reference axis (for example, the reference axis 2 in FIG. 1) of the support member may be matched. In the case of a scan space that is a three-dimensional measurement, a measurement is performed by measuring a straight line that passes through the apex of a conical scan space and corresponds to a rotation axis that is rotationally symmetric with respect to the conical shape by changing the direction in which the object is measured. The basic axis of the length measuring device may be set to coincide with the basic axis of the length measuring device and the reference axis of the support member. Note that the length measurement unit may include this measurement angle measurement unit.

[Calculation unit and calculation step]
The distance between objects is the minimum distance measured by the length measuring device, the measurement angle measured by the measurement angle measuring unit when the minimum value is measured, and the length between both ends of the support member (hereinafter referred to as , Called the length of the support member). For example, as shown in FIG. 1, the length measuring device 3 is arranged at one end of the support member 4, and the other end (the end opposite to the end at which the length measuring device for measuring the distance is arranged (measurement reference point 5)). When measuring the distance between the objects by contacting the object with one object, the minimum distance di measured by the length measuring device, the measurement direction when the minimum value di is scanned (from the length measuring device 3 to the measuring object) The shortest distance Di between the objects from the measurement angle θi and the support member length L formed by the perpendicular line 31 ') and the basic axis 9 of the length measurement unit (that is, the reference axis 2 of the support member). Can be obtained by the following Equation 1.
Di = di + L · cos (θi) (Formula 1)
In FIG. 1, a perpendicular line 31 drawn from the measurement reference point 5 to the measurement target plane 10 is shown, and the shortest distance Di between the objects is described.

The calculation unit (calculation step) (the calculation unit is not shown) only needs to have at least a function of performing calculation according to the above equation 1. Specific calculation means (calculation method) is not particularly limited. For example, the calculation can be performed by a program set in advance in a microprocessor (MPU) incorporated in the measurement apparatus according to the present invention.
When the reference axis of the support member is perpendicular to the measurement target plane or when the scan plane 6 and the measurement target plane 10 intersect perpendicularly, the value of Di becomes the minimum value, which is the measurement reference point and the measurement. This is the distance to the target plane. That is, among the sequentially calculated values of Di, the minimum value thereof can be obtained and used as the distance between the measurement reference point and the measurement target plane.

When placing length measuring sections (length measuring steps) on both ends of the support member, measure the distance to the measurement target plane for each length measuring section (length measuring step) and add the length of the support member to it. Thus, the distance between the measurement target planes can be obtained by calculation through the calculation process.
For example, as shown in FIG. 9, an arbitrary point on the reference axis is used as a measurement reference point, the distance from the measurement reference point to the measurement target plane is calculated for each length measuring unit, and added to the measurement. The distance between target planes can be determined. FIG. 9 shows an example in which the support member is linear. Therefore, an arbitrary point 45 on the support member is set as a measurement reference point. At this time, the minimum value di of the distances obtained while the length measuring unit 3 provided at one end performs one scan and the minimum value di obtained by the length measuring angle measuring unit at one end thereof. Is the measurement angle θi formed by the measurement direction and the reference axis when scanning. Further, the distance Li is a distance from one point 45 on the reference axis of the support member to one end of the support member (an end where the length measuring unit 3 is disposed).

On the other hand, the minimum value dj of the distance obtained while the length measuring unit 3 ′ provided at the other end of the support member performs one scan and the minimum value obtained by the length measuring angle measuring unit at the other end. The value dj is defined as a measurement angle θj formed by a measurement direction and a reference axis when scanned. Further, the distance Lj is a distance from one point 45 on the reference axis of the support member to the other end of the support member (the end where the length measuring section 3 ′ is disposed). From these di, θi, Li and dj, θj, Lj and the following formulas 2 and 3, in the calculation unit (calculation step), the point 45 on the reference axis of the support member and the measurement target planes 10, 10 ′ The distances Di and Dj are obtained, and the sum of the minimum value of Di and the minimum value of Dj obtained by both length measuring units 3 and 3 ′ is used as the distance between the measurement target planes 10 and 10 ′. be able to.
Di = di + Li · cos (θi) (Equation 2)
Dj = dj + Lj · cos (θj) (Equation 3)

  That is, as in the case where the length measuring unit is arranged only on one side, when the reference axis 2 of the support member 4 is perpendicular to the measurement target planes 10, 10 ′, or when the scan planes 6, 6 ′ and the measurement target planes are When 10, 10 'intersects perpendicularly, the values of Di, Dj become the minimum value, which is the distance between the measurement object planes 10, 10'. That is, among the values of Di and Dj that are sequentially calculated, their minimum values are obtained, and their total value (minimum value of Di + minimum value of Dj) is used to calculate the distance between the measurement target planes 10 and 10 ′. It can be. When one scan plane 6 and the other scan plane 6 ′ are on the same plane, when Di and Dj are minimum values (that is, when the minimum value of Di + the minimum value of Dj is also the minimum value), Geometrically, θi = θj.

  Further, the distance measuring method in the case where the length measuring unit (length measuring step) is arranged on one side is applied to the case where the length measuring unit (length measuring step) is arranged on both ends, By making the other scan plane 6 ′ the same plane, for example, as shown in FIG. 8, the distance between the measurement target planes can be obtained by calculation.

That is, the minimum value di among the distances obtained while the length measuring unit 3 provided at one end of the support member 4 performs one scan and one end (the end where the length measuring unit 3 is disposed) The measurement angle θi formed by the measurement direction and the reference axis when the minimum value di obtained by the measurement angle measurement unit is scanned is used. On the other hand, of the distances obtained while the length measuring unit 3 ′ provided at the other end of the support member 4 performs one scan, the minimum value dj and the other end (the end where the length measuring unit 3 ′ is disposed). ), The measurement angle θj formed by the measurement direction and the reference axis when the minimum value dj is scanned. Further, from the length L between both ends of the support member 4 and the following equation 4, the calculation unit (calculation step) obtains the distance Dk between the measurement target planes 10 and 10 ′, and the measurement unit obtains it during the measurement. The obtained minimum value of Dk can be set as the distance between the measurement object planes.
Dk = di + dj + (L · cos (θi) + L · cos (θj)) / 2 (Expression 4)

  In this case, as in the case where the length measuring unit is arranged only on one side, the measurement is performed when the reference axis 2 of the support member 4 is perpendicular to the measurement target planes 10 and 10 ′, and the scan planes 6 and 6 ′. When the target planes 10 and 10 ′ intersect perpendicularly, the value of Dk becomes the minimum value, which is the distance between the measurement target planes 10 and 10 ′. That is, among the values of Dk that are sequentially calculated, the minimum value thereof can be obtained and used as the distance between the measurement target planes 10, 10 '. When Dk becomes the minimum value, geometrically θi = θj.

[Display section (display step)]
The display unit (display step) (the display unit is not shown) has a function of displaying the result calculated by the calculation unit so that the operator can recognize it. Specific display means (display method) is not particularly limited as long as the operator can recognize it. For example, the calculation result can be displayed by a liquid crystal display device.

[Example of distance measurement work and guide device]
The operator can work while confirming the shortest distance displayed on the display unit.
The distance to the target plane is measured when the reference axis is arranged so as to be perpendicular to the measurement target plane. In actual measurement work, it is difficult to place the reference axis strictly perpendicular to the target plane. However, as shown in the conceptual diagram of the measurement operation in FIG. 5, when the operator moves the support member so as to be substantially perpendicular to the scan plane 6 by the length measuring device (FIG. 5B), The length measuring device can scan (sweep) and measure an arbitrary range within the surface (measurement target plane 10) of the target plane from one end (measurement reference point 5) of the support member 4. The range measured by scanning at this time is referred to as a sweep surface 32 on the measurement target plane. At this time, if the scanning plane 6 by the length measuring device is arranged perpendicular to the object, the shortest distance between the objects is obtained. That is, the distance between the objects is obtained at this time.

That is, when the scan plane 6 is arranged perpendicular to the measurement target plane 10, the reference axis 2 ′ of the support member 4 coincides with the reference axis 2 in FIG. 1 and is lowered from the measurement reference point 5 to the measurement target plane 10. The perpendicular line 31 coincides with the perpendicular line 31 drawn on the measurement target plane in FIG. Therefore, the shortest distance between the measurement reference point 5 and the measurement target plane 10 can be calculated from the angle formed by them (θi in FIG. 1).
Therefore, when there is a measurement part at one end of the support member 4, the other end (measurement reference point 5) is fixed to one object, and the support member 4 and the length measurement part 3 are, for example, shown in FIG. By moving the length measuring unit 3 so as to be substantially perpendicular to the scan plane 6 as in the search direction 33, the shortest distance between the objects is efficiently determined with the minimum value of the obtained distance that changes sequentially. be able to.

A more specific description will be given with reference to FIG. As shown in FIG. 6A, when the scan plane 6 and the measurement target plane 10 are perpendicular to each other, the plane including the perpendicular line 31 and the reference axis 2 drawn from the measurement reference point 5 to the measurement target plane 10 and the scan This is a case where the plane 6 overlaps. At this time, it is easily understood that the distance measured by the length measuring device becomes the minimum value. FIG. 6B shows the situation at this time as viewed from directly above. The minimum distance di measured by the length measuring device 3, the measurement direction when the minimum value di is scanned (that is, the vertical line 31 'drawn from the length measuring section 3 to the measurement target plane 10), and the basics of the length measuring section From the measurement angle θi formed by the axis (that is, the reference axis 2 of the support member) and the support member length L, the shortest distance Di between the objects is obtained by the above-described Expression 1.
Di = di + L · cos (θi) (Formula 1)

  As can be seen from FIG. 6B, it can be seen that Di obtained at this time is equal to the distance from one end of the support member (measurement reference point 5) to the measurement object plane 10. That is, if the scan plane 6 is perpendicular to the measurement target plane 10, the distance to the measurement target plane 10 can be obtained.

  Therefore, in the case where the length measuring unit is provided at one end of the support member, the support member 4 and the length measuring unit 3 are moved so as to be substantially perpendicular to the scan plane 6 of the length measuring unit 3, for example, the support member 4 A guide device 41 may be disposed at one end (measurement reference point) (FIG. 7). The guide device 41 shown in FIG. 7 is arranged so that the support member can rotate in one plane around the end portion (measurement reference point) of the support member, and the rotation surface thereof is the length measuring device 3. The support member may be fixed so as to be substantially perpendicular to the scan plane 6. This makes it easy to scan (sweep) the length measuring device so as to be substantially perpendicular to the scan plane.

When there are length measuring units at both ends of the support member, as described above, the distance between the measurement target planes can be obtained by adding and calculating the measurement results of the respective length measuring units.
Here, as shown in FIG. 8, when the planes scanned by the length measuring units at both ends are within the same plane, or as shown in FIG. 9, one point on the reference axis of the support member is fixed and measured. The case where the long part is measured will be described. That is, as shown in FIGS. 8 and 9, when the scan planes 6 and 6 ′ and the measurement target planes 10 and 10 ′ are perpendicular to each other, the measurement reference points of the length measuring devices 3 and 3 ′ (see FIG. 8). In this case, the other ends, that is, the length measuring devices 3 ′ and 3, respectively, and in the case of FIG. This is the case where the perpendicular lines 31, 31 ′, 31 ″ and the plane including the reference axis 2 overlap the scan planes 6, 6 ′. At this time, it is easily understood that the distance measured by each length measuring device becomes the minimum value. FIGS. 8 and 9 are views of the situation at this time as viewed from directly above (conceptual views when viewed from a direction substantially perpendicular to the scan planes 6 and 6 ′). The method for obtaining the distance by each length measuring unit is as described above.

  When there are length measuring portions at both ends of the support member, the support member 4 and the length measuring portions 3 and 3 ′ are a point on the reference axis of the support member 4 (a point corresponding to one point 45 on the reference axis in FIG. 9). .) May be used as a guide device (a jig) 42 that can rotate in the same plane (FIG. 10). As shown in FIG. 10, the guide device 42 supports the support member at a point 45 on the reference axis so that the rotation surface thereof is substantially perpendicular to the scan planes 6 and 6 ′ of the length measuring units 3 and 3 ′. It is good to be configured. Thereby, it is possible to easily scan the sweeping unit so as to be substantially perpendicular to the scan plane.

  Further, when the planes scanned by the length measuring units at both ends are in the same plane, the support member 4 and the length measuring units 3, 3 ′ are the same without rotating around one point on the reference axis of the support member. A guide device (jig) 43 that can move (tilt) in a plane may be used (FIG. 11). The guide device 42 shown in FIG. 11 may be configured to support the support member so that the movable (tilting) surface thereof is substantially perpendicular to the scan planes 6 and 6 ′ of the length measuring units 3 and 3 ′. . Thereby, it is possible to easily scan the sweeping unit so as to be substantially perpendicular to the scan plane.

  For example, when the horizontal plane can be virtually assumed as a plane perpendicular to the measurement target plane, the other end is moved from the upper position in the vertical direction to the lower position or from the lower position to the upper position with respect to one end of the support member. Move it. For example, a level may be arranged on the support member so that this can be easily recognized. The level is preferably arranged on the support member in parallel to the reference axis. This is because it can be easily confirmed by the level device that the inclination of the support member is reversed with respect to the horizontal. In this case, it can be easily seen that the reference axis is also horizontal when the level is in the horizontal state. This can be applied to the case where the length measuring unit is arranged only at one end or both ends.

[Storage Unit and Minimum Value Determination Unit (Storage Step and Minimum Value Determination Step)]
It is not easy for the operator to check the display unit while checking the minimum value while working. Therefore, instead of the operator's confirmation work, it is preferable to sequentially store the obtained distance measurement data and obtain the minimum value from them.
The storage unit (storage step) (the storage unit is not shown) has a function of storing measurement data obtained by the calculation unit. Specific storage means (storage method) is not particularly limited. For example, it can be stored sequentially in a flash memory or the like.

The minimum value determination unit (minimum value determination step) has a function of selecting the minimum value from the measured measurement data stored in the storage unit. A specific minimum value determining means (minimum value determining method) is not particularly limited. For example, it may be programmed to select the minimum value from the measurement data stored in the storage unit of the microprocessor.
The minimum value of the measurement data obtained in this way can be determined as the distance between the objects.

  Further, from the viewpoint of improving work efficiency, for example, when the minimum value of the measurement data measured by the minimum value determination unit while measuring is determined and the minimum value is not updated for a certain period of time, the distance between the objects (this value is already set). It is better to notify the operator that the minimum value is obtained. The notification method is not particularly limited. For example, an alarm sound may be generated. Thereby, it is possible to perform highly accurate measurement while shortening a series of measurement times.

[Example 1]
In the distance measuring device according to the present invention, which has a linear support member and has a laser length measuring device with a measuring angle measuring function at one end thereof, between the auxiliary roll and chock support surface in the housing of the rolling mill. The distance was measured.
Length measuring section: Keyence Corporation LJ-V7080 type (laser type plane scan type length measuring device)
Distance measurement range is 80 ± 23mm
Scan width is 32 ± 7mm
Scan cycle is 0.001 sec. Measurement frequency is 10,000 times / scan support member: made of invariant steel (Fe-36Ni steel (Invar alloy)) L1620mm × φ30mm
Object to be measured: Distance between auxiliary roll and chock support plate of rolling mill housing (about 1700mm)
Measurement method: Auxiliary roll / chock support surface was measured at any 9 points, and the distance between the chock support surfaces was measured. This measurement was performed in five rolling mills, and the measurement accuracy and average measurement time were determined.
As shown in Table 1, the distance measuring device according to the present invention improves measurement accuracy by 10 times compared with the measurement using the conventional dial gauge, and the measurement time is 20% (1/5) of the conventional measurement. Became.

[Example 2]
The distance between the auxiliary roll and chock support surface in the housing of the rolling mill was measured with the distance measuring device according to the present invention in which the laser length measuring device used in Example 1 was arranged at both ends of the linear support member. . The support member and the measurement target are the same as those in the first embodiment. The measurement method was the same as in Example 1.
Table 2 shows the results. The distance measuring device according to the present invention in which the length measuring parts are arranged at both ends of the support member improves the measurement accuracy by 10 times or more compared with the measurement by the conventional dial gauge, and the measurement time is 20% or less than the conventional. .

  INDUSTRIAL APPLICABILITY The measuring apparatus and measuring method according to the present invention can be used for measuring the distance between parallel columns having flat surfaces facing each other in parallel, such as all equipment and buildings.

DESCRIPTION OF SYMBOLS 1 Measuring apparatus 2 based on this invention Reference | standard axis | shaft 3, 3 'Length measuring part (length measuring device)
4 Supporting member 5 Measurement reference point (end opposite to where the length measuring section is arranged)
6, 6 'scan plane 6 "scan space 7, 7' parallel column (parallel facing surfaces)
8 Scanning plane center angle 9, 9 'Basic axis 10, 10' Measuring plane 21 Rolling mill housing 22 Auxiliary roll / chock 23 Auxiliary roll 24 Work roll 25 Work roll / chock 26, 26 'Work roll / chock support surface 27 , 27 'Auxiliary roll / chock support surfaces 31, 31', 31 '' Vertical line of measurement target plane 32 Sweep surface on measurement target plane 33 Search direction 41 Guide device (when measuring part is arranged at one end)
42 Guide device (when measuring part is arranged at both ends)
43 Guide device (when measuring part is arranged at both ends)
45 One point on the reference axis

Claims (36)

A distance measuring device for measuring a distance to a plane to be measured, a support member having both ends on a linear reference axis, and at least one end of the support member, and in a plane including at least the reference axis Measuring the distance between the measurement target plane and the measuring axis, and measuring the angle formed by the reference axis and the direction measured along with the length measuring section. An angle measurement unit, a calculation unit that calculates a distance to the measurement target plane, and a display unit that displays a result calculated by the calculation unit,
The calculation unit calculates the distance to the measurement target plane from the distance measured by the length measurement unit, the angle measured by the measurement angle measurement unit, and the length between both ends of the support member, Distance measuring device.
The length measurement unit is disposed at one end of the support member, and the calculation unit is a measurement reference point that is an end opposite to an end of the support member on which the length measurement unit is disposed, and the measurement The distance measuring apparatus according to claim 1, wherein a distance from the target plane is calculated.
The distance measuring device according to claim 1, wherein the length measuring units are arranged at both ends of the support member, and the calculation unit calculates a distance between the measurement target planes.
Among the distances obtained while the length measurement unit performs one scan, the calculation unit scans the minimum value di and the measurement direction and the reference axis obtained by the measurement angle measurement unit. And a length L between both ends of the support member, and the following formula 1,
A distance Di between the measurement reference point and the measurement target plane is obtained, and a minimum value of Di obtained by the length measurement unit during measurement is set as a distance between the measurement reference point and the measurement target plane. The distance measuring device according to claim 2.
Di = di + L · cos (θi) (Equation 1)
The calculation unit obtains the minimum value di among the distances obtained while the length measurement unit provided at one end of the support member performs one scan, and the length measurement angle measurement unit at the one end. A measurement angle θi formed by the measurement direction and the reference axis when scanning the minimum value di,
A distance Li from the fixed point on the reference axis of the support member to one end of the support member when the length measuring unit measures by fixing one point on the reference axis of the support member When,
Among the distances obtained while the length measuring unit provided at the other end of the support member performs one scan, the minimum value dj and the minimum value obtained by the length measuring angle measuring unit at the other end. a measurement angle θj formed by a measurement direction and a reference axis when dj is scanned;
The distance Lj from the fixed point on the reference axis of the support member to the other end of the support member, and the fixed point on the reference axis of the support member and the measurement object from the following formulas 2 and 3 The distances Di and Dj with respect to the plane are obtained, and the length measuring unit sums the minimum value of Di and the minimum value of Dj obtained during measurement.
The distance measuring device according to claim 3, wherein the distance is a distance between the measurement target planes.
Di = di + Li · cos (θi) (Equation 2)
Dj = dj + Lj · cos (θj) (Equation 3)
The calculation unit obtains the minimum value di among the distances obtained while the length measurement unit provided at one end of the support member performs one scan, and the length measurement angle measurement unit at the one end. And the distance obtained during one scan of the length measuring portion θi formed by the measurement direction and the reference axis when the minimum value di is scanned and the other end of the support member. , The measurement angle θj formed by the measurement direction when the minimum value dj is scanned and the reference axis, obtained by the measurement angle measurement unit at the other end, and the support member From the length L between both ends and the following formula 4,
The distance Dk between the measurement target planes is obtained, and when the planes scanned by the length measuring units arranged at both ends are in the same plane, the minimum value of Dk obtained by the length measuring unit during measurement is calculated. The distance measuring device according to claim 3, wherein the distance is a distance between the measurement target planes.
Dk = di + dj + (L · cos (θi) + L · cos (θj)) / 2 (Expression 4)
The distance measuring device according to claim 2, further comprising a guide device that allows the support member to rotate in the same plane around the measurement reference point.
The distance measuring device according to claim 3, further comprising a guide device that allows the support member to rotate in the same plane around one point on the reference axis of the support member.
The distance measuring device according to claim 3, further comprising a guide device that allows the support member to tilt in the same plane.
The distance measuring device according to claim 7, wherein the same plane when the support member rotates or tilts and a plane scanned by the length measuring unit are perpendicular to each other.
The measurement reference point is on one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the measurement target plane is the other liner surface. The distance measuring device according to any one of claims 2, 4, and 7, wherein:
One of the measurement target planes is one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the other measurement target plane is the other liner surface. The distance measuring device according to any one of claims 3, 5, 6, 8, and 9.
The distance measuring device according to claim 1, wherein a leveling device is disposed on the support member in parallel with the reference axis.
The distance measuring device according to any one of claims 1 to 13, wherein the length measuring unit measures using an ultrasonic wave or a laser.
A storage unit that stores the distance obtained by the calculation unit; and a minimum value determination unit that determines a minimum value of the stored distances, and the obtained minimum value is displayed on the display unit. The distance measuring device according to any one of claims 1 to 14.
The distance measuring apparatus according to claim 1, wherein the support member is made of invariant steel.
The distance measuring device according to claim 1, wherein the support member is adjustable in expansion and contraction in the reference axis direction.
The distance measuring device according to claim 1, wherein a scan cycle of the length measuring unit is 0.001 second or less.
A distance measurement method for measuring a distance to a plane to be measured, wherein at least one end of a support member having both ends on a linear reference axis is scanned while scanning at least the plane including the reference axis. A length measuring step for measuring the distance between the flat surface in a non-contact manner, a length measuring angle measuring step for measuring an angle formed by a direction measured along with the length measuring step and the reference axis, and the measurement A calculation step for calculating the distance to the target plane; and a display step for displaying the result calculated in the calculation step,
The calculating step calculates a distance to the measurement target plane from the distance measured in the length measuring step, the angle measured in the length measuring angle measuring step, and the length between both ends of the support member. How to measure distance.
The length measurement step measures the distance between the measurement target plane at one end of the support member in a non-contact manner,
The distance measuring method according to claim 19, wherein the calculating step calculates a distance between a measurement reference point that is the other end of the support member and the measurement target plane.
The length measuring step measures the distance between the measurement target planes at each end of the support member in a non-contact manner,
The distance measuring method according to claim 19, wherein the calculating step calculates a distance between the measurement target planes.
Among the distances obtained during one scan in the length measurement step, the calculation step is the minimum value di, and the measurement direction and the reference axis obtained when the minimum value di is scanned in the length measurement angle measurement step. And a length L between both ends of the support member, and the following formula 1,
A distance Di between the measurement reference point and the measurement target plane is obtained, and a minimum value of Di obtained during the measurement by the measurement step is set as a distance between the measurement reference point and the measurement target plane. 21. A distance measuring method according to claim 20, wherein
Di = di + L · cos (θi) (Equation 1)
The calculation step is obtained by the minimum value di among the distances obtained during one scan in the length measurement step at one end of the support member and the length measurement angle measurement step at the one end. , The measurement angle θi formed by the measurement direction and the reference axis when scanning the minimum value di,
A distance Li from the fixed point on the reference axis of the support member to one end of the support member when one point on the reference axis of the support member is fixed and measured in the length measuring step When,
Among the distances obtained during one scan in the length measuring step at the other end of the support member, the minimum value dj obtained in the length measuring angle measuring step at the other end Measurement angle θj formed by the measurement direction and the reference axis when scanned,
The distance Lj from the fixed point on the reference axis of the support member to the other end of the support member, and the fixed point on the reference axis of the support member and the measurement object from the following formulas 2 and 3 The distances Di and Dj with respect to the plane are obtained, and the sum of the minimum value of Di and the minimum value of Dj obtained during the measurement in the length measurement step,
The distance measurement method according to claim 21, wherein the distance is a distance between the measurement target planes.
Di = di + Li · cos (θi) (Equation 2)
Dj = dj + Lj · cos (θj) (Equation 3)
The calculation step is obtained by the minimum value di among the distances obtained during one scan in the length measurement step at one end of the support member and the length measurement angle measurement step at the one end. , The measurement angle θi formed by the measurement direction and the reference axis when the minimum value di is scanned, and the minimum distance among the distances obtained during one scan in the measurement step at the other end of the support member The value dj, the measurement angle θj formed by the measurement direction when the minimum value dj is scanned and the reference axis, obtained in the measurement angle measurement step at the other end, and between both ends of the support member From the length L and the following formula 4,
The distance Dk between the measurement target planes is obtained, and when the planes to be scanned in the length measurement steps at both ends are in the same plane, the minimum value of Dk obtained during the measurement in the length measurement step is determined as the measurement target. The distance measuring method according to claim 21, wherein the distance is a distance between planes.
Dk = di + dj + (L · cos (θi) + L · cos (θj)) / 2 (Expression 4)
The guide member that allows the support member to rotate in the same plane around the measurement reference point, wherein the support member rotates in the same plane around the measurement reference point. The distance measuring method according to 20 or 22.
With the guide device that allows the support member to rotate within the same plane around one point on the reference axis of the support member, the support member is centered on one point on the reference axis of the support member. 24. The distance measuring method according to claim 21, wherein the distance is rotated in the same plane.
The distance measuring method according to claim 21 or 24, wherein the support member is tilted in the same plane by a guide device that allows the support member to tilt in the same plane.
The distance measuring method according to any one of claims 25 to 27, wherein the same plane when the support member rotates or tilts and a plane scanned in the length measuring step are perpendicular to each other.
The measurement reference point is on one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the measurement target plane is the other liner surface. The distance measuring method according to any one of claims 20, 22, and 25.
One of the measurement target planes is one liner surface of a pair of liner surfaces installed in a rolling mill housing and facing each other in the rolling direction, and the other measurement target plane is the other liner surface. The distance measuring method according to any one of claims 21, 23, 24, 26, and 27.
The support member is moved by a leveler arranged on the support member in parallel with the reference axis so that one end thereof is at least from the upper side in the vertical direction or the lower side in the vertical direction relative to the other end. The distance measuring method according to any one of claims 19 to 30, wherein
The distance measuring method according to any one of claims 19 to 31, wherein the length measuring step uses ultrasonic waves or a laser.
A storage step for storing the distance obtained by the calculation step; and a minimum value determination step for determining a minimum value among the stored distances, wherein the minimum value obtained by the display step is displayed. The distance measuring method according to any one of claims 19 to 32.
The distance measuring method according to any one of claims 19 to 33, wherein the support member is made of invariant steel.
The distance measuring method according to any one of claims 19 to 34, wherein the support member is adjustable in expansion and contraction in the reference axis direction.
  36. The distance measuring method according to any one of claims 19 to 35, wherein a scan cycle in the length measuring step is 0.001 second or less.