JP4801845B2 - 3D position measurement device for holes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for measuring a three-dimensional position of a hole. More specifically, the present invention relates to an apparatus having a probe in which an accelerometer and a gyroscope are mounted, and a cable for pulling up the probe from a terminal end of a hole to be measured to an entrance.
[0002]
[Prior art]
Holes made of excavated holes or pipes buried in the ground may be displaced from the originally planned position, or bend with time due to the influence of the ground or surrounding construction. This becomes a big problem especially in recent years when the depth and important construction are increasing.
[0003]
Therefore, for example, the three-dimensional position of the hole is measured with an apparatus as shown in FIG. 1 (note that the numbers in parentheses in the figure are reference numerals in this embodiment to be described later), FIG. 2 and FIG. In addition, accuracy control of the hole is attempted.
This conventional apparatus includes a probe 101 in which an accelerometer and a gyroscope (not shown) are mounted, a cable 102 for pulling up the probe 101 from a terminal HE of a hole H to be measured to an inlet HS, and a hole inlet An angle scale plate 103 fixed to the HS is mainly included. The cable 102 can be unwound and unwound by a winch 104 via a pulley 105, and data from an accelerometer and a gyroscope is calculated based on, for example, the cable length or the rotation speed of the pulley 105. The data can be transmitted to the computer 107 in association with the distance from the hole inlet HS. On the outer peripheral surface of the probe 101, a center riser comprising a leaf spring for holding the probe 101 at the axial center of the hole H, smoothing the movement of the probe 101 in the hole, and preventing the probe 101 from rotating as much as possible. 108, 108... Are attached. A gauge insertion groove 109 is formed on the outer peripheral surface of the tip portion of the probe 101, and an insertion gauge 110 can be inserted into the gauge insertion groove 109. As shown in FIGS. 2 and 3, the angle scale plate 103 is provided with an angle scale of 0 to 360 degrees in the circumferential direction on its upper surface, and screws 111 and 111 are formed on the casing 112 at the hole inlet HS portion. (The screw is not shown in FIG. 2).
[0004]
In measuring the three-dimensional position of the hole using a conventional apparatus, first, the tip of the probe 101 is inserted into the angle scale plate 103, and the cable 102 is attached to the tip of the probe 101 in this state. Then, the probe 101 and the angle scale plate 103 are suspended by the cable 102, and the angle scale plate 103 is fixed to the casing 112 of the hole entrance HS by screws 111. When this fixing is completed, the winch 104 is driven to feed the cable 102, and the probe 101 is once lowered to the hole end HE. Then, the cable 102 is rewound from there, and the probe 101 is pulled up to the hole entrance HS. In this pulling, the inclination angle of the hole end HE is measured by an accelerometer mounted on the probe 101, and the angular velocity is continuously measured by a gyroscope mounted on the probe 101. The data is transmitted to the calculation device 107 in association with the distance from the hole inlet HS via 102. When the drive of the winch 104 is stopped and the probe 101 stops at the hole entrance HS, the insertion gauge 110 is inserted into the gauge insertion groove 109, and the scale indicated by the insertion gauge 110 is read. This read value (hereinafter also referred to as torsion angle) is input to the calculation device 107 using the input device 106. The calculation device 107 calculates the three-dimensional position of the hole H from the previously transmitted inclination angle, angular velocity, and distance shift of the hole end HS and the twist angle input from the input device 106.
[0005]
[Problems to be solved by the invention]
However, in the conventional apparatus as shown in FIGS. 1 to 3, the torsion angle must be measured by visual observation, and this measurement value must be artificially input to the calculation apparatus. bad. Further, since the measurement of the twist angle is visual, the scale cannot be made so fine and the measurement accuracy cannot be said to be sufficient.
[0006]
Therefore, an object of the present invention is to provide a three-dimensional position measuring device for a hole which does not require personnel for measuring and inputting a twist angle and has improved measurement accuracy.
[0007]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A three-dimensional position measuring device for a hole having a probe on which an accelerometer and a gyroscope are mounted, and a cable for pulling up the probe from the terminal end of the hole to be measured to the inlet,
A tubular material that is attached to the entrance of the hole and through which the tip of the probe is inserted when the probe is lifted;
An apparatus for measuring a three-dimensional position of a hole, characterized in that the inner peripheral surface of the tubular material and the outer peripheral surface of the probe tip satisfy the following relationships (1) to (4).
(1) A convex portion protruding toward the other surface is formed on any one surface,
(2) A guide portion is formed on the surface (the other surface) which is not the surface on which the convex portion is formed, overhanging the entire circumference in an oblique direction around the circumference,
(3) When the tip of the probe is inserted through the tubular material, the convex portion and the guide portion abut in the axial direction,
(4) The contact position moves to a predetermined position along the guide portion or stays at the predetermined position.
[0008]
<Invention of Claim 2>
The tubular material is composed of an outer tubular material connected to the inlet of the hole, and an inner tubular material provided inside the outer tubular material so as to be axially slidable and non-rotatable around the axial center. A three-dimensional position measuring apparatus for holes according to 1.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
As shown in FIG. 1, the measuring apparatus according to the present embodiment is an accelerometer in the X-axis and Y-axis directions (not shown. As shown in FIG. 1, the X-axis and Y-axis are orthogonal to the horizontal direction. .) And three-axis (X-axis, Y-axis, and Z-axis) type gyroscopes (not shown) are mounted inside, and the probe 1 is provided with center risers 8, 8,. And a cable 2 that pulls up the probe 1 from the terminal end HE of the hole H to be measured to the inlet HS (numbers in parentheses in the figure are reference numerals in the present embodiment). The same drawing is used to clarify the correspondence with the conventional apparatus, and it does not mean that each apparatus has the same configuration as the conventional apparatus. It will be clarified in the following explanation. .
However, unlike the conventional apparatus, the tubular material 3 is fixed to the hole inlet HS instead of the angle scale plate 103, and the shape of the outer peripheral surface of the probe 1 is changed.
[0010]
<Tubular material>
4 is a partially cutaway perspective view of the hole inlet HS portion, FIG. 5 is a longitudinal sectional view of the tubular material 3, and FIG. 6 is a plan view of the tubular material 3.
As shown in FIG. 4, the casing 12 is inserted in the ground G of the hole inlet HS portion toward the axial direction of the hole H. A tubular material 3 is attached to the casing 12. The tubular material 3 includes an outer tubular material 9 and an inner tubular material 10 that is provided inside the casing 12 and into which the distal end portion 1 </ b> A of the probe 1 can be inserted. As shown in FIG. 5 and FIG. 6, the outer tubular member 9 has a distal end portion that spreads outward, and a tubular screw stopper portion 21 that extends toward the proximal end portion at the distal end portion of the expanded portion. Is provided. The screw fixing portion 21 can screw the screws 11, 11, and the heads 11 A, 11 A of the screwed screws 11, 11 press the casing 12 from both sides, whereby the outer tubular material 9 is It is fixed to the casing 12. A key 22 protruding toward the outer peripheral surface of the inner tubular member 10 is formed on the inner peripheral surface of the outer tubular member 9, and a key groove 23 into which the key 22 is inserted is pivoted on the outer peripheral surface of the inner tubular member 10. It is formed in the direction of the heart. Due to the action of the key 22 and the key groove 23, the outer tubular member 9 and the inner tubular member 10 do not rotate relative to each other around the axis, but are slidable in the axial direction. However, since the distal end portion of the inner tubular material 10 spreads outward like the outer tubular material 9, a slide that causes the inner tubular material 10 to fall out from the outer tubular material 9 into the hole H is prevented. . In addition, the effect by having comprised the inner tubular material 10 so that it can slide in the axial direction of the outer tubular material 9 is mentioned later.
[0011]
<Relationship between inner peripheral surface of tubular material and outer peripheral surface of probe>
In the apparatus of the present invention, the inner peripheral surface of the tubular material and the outer peripheral surface of the probe are formed on one of the surfaces (1) with protrusions protruding toward the other surface, and (2) the protrusions are A guide portion is formed on the non-formed surface (the other surface) so as to extend over the entire circumference in an oblique direction around the circumference. (3) When the tip of the probe is inserted through the tubular material, The convex portion and the guide portion are in contact with each other in the axial direction, and (4) the contact position is configured so as to move to the predetermined position along the guide portion or remain at the predetermined position. There is a need.
[0012]
As an example of this configuration, in the present embodiment, as shown in FIGS. 4 to 6, a convex portion 24 that protrudes toward the outer peripheral surface of the probe tip 1 </ b> A is formed on the inner peripheral surface of the inner tubular member 10. Then, a guide portion 25 was formed on the outer peripheral surface of the probe tip portion 1A so as to project over the entire circumference in an oblique direction around the circumference. The guide portion 25 can also be formed by directly changing the shape of the outer peripheral surface of the probe tip 1A. In the present embodiment, the one-end oblique notch tube 25 having a shape as shown in FIG. It was formed by attaching to the outer peripheral surface of the part 1A (note that the notch tube functions as a guide part when attached to the probe, so the notch pipe and the guide part have the same reference numerals). .
[0013]
The notch portion of the notch tube 25 is directed obliquely around the circumference of the probe tip portion 1A when attached to the probe tip portion 1A, and is gradually cut away from the tip portion 25a as shown in FIG. The guide portion 26 has a large amount, and the engaging portion 27 has a shape in which the convex portion 24 can be inserted in the axial direction at a point where the notch amount is the largest. Therefore, when the probe distal end portion 1A is inserted into the inner tubular member 10, the convex portion 24 and the guide portion 26 (guide portion 25) abut in the axial direction (in the case of FIG. This contact position moves to a predetermined position, that is, the locking portion 27 along the guide portion 26 (guide portion 25). When the state in which the contact position moves is observed as a whole, the inner tubular material 10 formed with the convex portions 24 does not rotate around the axis due to the action of the key 22 and the key groove 23. Rotates to a predetermined position around its axis based on the contact force between the convex portion 24 and the guide portion 26 (guide portion 25) (until the convex portion 24 is locked to the locking portion 27). It will be. When the contact start position (P point in the case of FIG. 7) is the locking portion 27, the probe 1 naturally does not rotate.
[0014]
In the present embodiment, the shape of the guide portion 26 is a curved shape, but is not limited to this shape, and may be a linear shape or the like. When the probe distal end portion 1A is inserted through the inner tubular member 10, the contact position with the convex portion 24 may be a shape that moves to a predetermined position. Moreover, although the latching | locking part 27 was provided in the point with the largest notch amount of the notch pipe | tube 25, it is not the meaning which makes formation of the latching | locking part 27 essential. Since the formation of the locking portion 27 is for setting the movement end position of the contact position, the design can be appropriately changed within a range in which this object is achieved. Further, as schematically shown in FIG. 8, a convex portion 30 is provided on the probe side (the outer peripheral surface of the probe tip portion 1A), and the guide portion 31 and the locking portion are provided on the tubular material side (the inner peripheral surface of the inner tubular material 10). A guide portion composed of the portion 32 can also be provided. In this embodiment, when the probe distal end portion 1A is inserted through the inner tubular member 10, the convex portion 30 and the guiding portion 31 are in contact with each other in the axial direction (in the case of FIG. 8, they are in contact at the point P). ), The contact position moves along the guiding portion 31 to a predetermined position, that is, the locking portion 32.
[0015]
<Measurement method>
Hereinafter, a method for measuring a three-dimensional position of a hole using the above apparatus will be described with reference to FIG.
In the measurement, first, the outer tubular material 11 is fixed to the casing 12 inserted into the hole inlet HS with screws 11 and 11. Next, the tip 1A of the probe 1 is inserted into the inner tubular member 10 to lock the convex portion 24 and the locking portion 27, and the cable 5 is attached to the tip of the probe 1 in this state. Then, the probe 1 and the inner tubular member 10 are set so that the key 22 of the outer tubular member 9 is inserted into the key groove 23 of the inner tubular member 10. When this setting is completed, the winch 4 is driven to feed out the cable 2, and the probe 1 is once lowered to the hole end HE. Then, the cable 2 is rewound, and the probe 1 is pulled up from the hole end HE to the hole inlet HS. When lifting, the inclination angle around the X axis and Y axis of the hole end HE is measured by an accelerometer mounted on the probe 1, and around the X axis, Y axis and Z axis by a gyroscope mounted on the probe 1. Are continuously measured, and these measured values are transmitted to the calculation device 7 through the cable 2 in association with the distance from the hole entrance HS measured with reference to the rotational speed of the pulley 5. At the hole entrance HS, the convex portion 24 of the inner tubular member 10 and the locking portion 27 of the guide portion 25 are locked, so that the probe 1 always has the same orientation as when the probe 1 was initially set. Turn to. Therefore, the measurement operation and input operation of the torsion angle are not required, and the measurement error of the torsion angle does not occur. Further, as described above, in the present embodiment, since the inner tubular member 10 slides in the axial direction of the outer tubular member 9, the convex portion 24 and the guide portion 25 (the guiding portion 26 or the locking portion) are arranged. Collision with the part 27) is alleviated, and damage to the convex part 24 and the guide part 25 is prevented. When the outer tubular member 9 and the inner tubular member 10 are integrally formed, the casing 12 to which the tubular member 3 is screwed may be damaged. However, in this embodiment, there is no such fear.
[0016]
In the calculation device 7, the change of the inclination angle is calculated based on the inclination angle and the angular velocity transmitted from the probe 1, and the change from the inclination angle and the distance from the hole inlet HS is performed from the hole inlet HS to the hole end HE. The three-dimensional position of the hole H is calculated.
[0017]
【The invention's effect】
Provided is a three-dimensional position measuring device for a hole which requires no personnel for measuring and inputting a torsion angle and has improved measurement accuracy.
[Brief description of the drawings]
FIG. 1 is a layout view of an apparatus for measuring a three-dimensional position of a hole.
FIG. 2 is a partially cutaway perspective view of an apparatus according to a conventional embodiment.
FIG. 3 is an angle scale plate.
FIG. 4 is a partially cutaway perspective view of the apparatus according to the present embodiment.
FIG. 5 is a longitudinal sectional view of a tubular material.
FIG. 6 is a plan view of a tubular material.
FIG. 7 is an explanatory view showing the movement of the inner tubular material, the outer tubular material, and the guide portion.
FIG. 8 is a schematic explanatory view showing a modification of the probe tip and the inner tubular material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Probe, 1A ... Probe tip part, 2 ... Cable, 3 ... Tubular material, 4 ... Winch, 5 ... Pulley, 7 ... Calculation apparatus, 8 ... Leaf spring, 9 ... Outer tubular material, 10 ... Inner tubular material, 11 ... Screws, 20 ... Casing, 21 ... Screw fixing part, 22 ... Key, 23 ... Key groove, 24 ... Projection part, 25 ... Guide part (notch tube), 26 ... Guide part, 27 ... Locking part, 30 ... Convex part, 31 ... guide part, 32 ... locking part, 101 ... probe, 102 ... cable, 103 ... angle scale plate, 104 ... winch, 105 ... pulley, 106 ... input device, 107 ... calculation device, 108 ... leaf spring 109 ... Gauge insertion groove, 110 ... Insertion gauge, 111 ... Screw, G ... Ground, H ... Hole, HE ... Hole end, HS ... Hole entrance.

Claims (2)

A three-dimensional position measuring device for a hole having a probe on which an accelerometer and a gyroscope are mounted, and a cable for pulling up the probe from the terminal end of the hole to be measured to the inlet,
A tubular material that is attached to the entrance of the hole and through which the tip of the probe is inserted when the probe is lifted;
An apparatus for measuring a three-dimensional position of a hole, characterized in that the inner peripheral surface of the tubular material and the outer peripheral surface of the probe tip satisfy the following relationships (1) to (4).
(1) A convex portion protruding toward the other surface is formed on any one surface,
(2) A guide portion is formed on the surface (the other surface) which is not the surface on which the convex portion is formed, overhanging the entire circumference in an oblique direction around the circumference,
(3) When the tip of the probe is inserted through the tubular material, the convex portion and the guide portion abut in the axial direction,
(4) The contact position moves to a predetermined position along the guide portion or stays at the predetermined position. The tubular material is composed of an outer tubular material connected to the inlet of the hole, and an inner tubular material provided inside the outer tubular material so as to be axially slidable and non-rotatable around the axial center. A three-dimensional position measuring apparatus for holes according to 1.

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