JP2002357418A - Three-dimensional position measuring device for hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional position measuring device for hole requiring no manpower for measuring/inputting an angle of torsion, and having improved measurement accuracy. SOLUTION: This device is equipped with a tubular material 3 (9 and 10) mounted on a hole inlet HS, for inserting therein a probe tip part 1A when pulling-up of a probe 1 is finished. A projection part 24 projecting toward the outer circumferential face of the probe tip part 1A is formed on the inner circumferential face of the tubular material 3, and a guide part 25 projecting all around the outer circumferential face of the probe tip part 1A in the oblique direction around the periphery is formed. When the probe tip part 1A is inserted into the tubular material 3, it is made that the projection part 24 abuts on the guide part 25 in the axial center direction, and the abutting position is moved along the guide part 25 up to a prescribed position 27, or remains at the prescribed position 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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 lifting the probe from the end of the hole to be measured to the entrance.

[0002]

2. Description of the Related Art An excavated hole or a hole made of a pipe or the like buried in the ground may be displaced from an originally planned position, or may be bent with time due to the influence of the ground or surrounding construction. This is a major problem, especially in recent years, where large depths and important construction are increasing.

Therefore, for example, a three-dimensional hole is formed by an apparatus as shown in FIG. 1 (note that the numbers in parentheses in the figure are symbols used in the present embodiment described later), and FIGS. The position is measured to control the hole accuracy. This conventional apparatus includes a probe 101 in which an accelerometer and a gyroscope (not shown) are mounted, and this probe 101 is connected to an entrance HS from a terminal HE of a hole H to be measured.
It mainly has a cable 102 to be pulled up to the center and an angle scale plate 103 fixed to the hole entrance HS. The cable 102 can be extended and rewound by a winch 104 via a pulley 105, and data from an accelerometer and a gyroscope are calculated based on, for example, a cable length or the number of revolutions of the pulley 105. Calculation device 10 in association with the distance from the hole entrance HS
7 can be transmitted. On the outer peripheral surface of the probe 101, the probe 101 is held at the axial center position of the hole H,
Also, the probe 101 can smoothly move in the hole,
The center risers 108, 108,... Made of leaf springs for preventing rotation of one as much as possible are attached. A gauge insertion groove 109 is formed on the outer peripheral surface of the tip of the probe 101, and an insertion gauge 110 can be inserted into the gauge insertion groove 109. As shown in FIG. 2 and FIG. 3, the angle scale plate 103 has an angle scale from 0 to 360 degrees in the circumferential direction on the upper surface thereof.
12 can be fixed with screws 111, 111 (the screws are not shown in FIG. 2).

When measuring the three-dimensional position of a hole using a conventional device, first, the tip of the probe 101 is inserted through the angle scale plate 103, and the cable 102 is attached to the tip of the probe 101 in this state. . And
Connect the probe 101 and the angle scale plate 103 to the cable 1
02, and the angle scale plate 103 is
It is fixed to the S casing 112 by screws 111, 111. When the fixing is completed, the winch 104 is driven to draw out 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. For this lifting, the probe 101
The angle of inclination 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, and these measured values are transmitted via a cable 102 to the hole entrance HS. Is transmitted to the computing device 107 in association with the distance from the computer. When the drive of the winch 104 is stopped and the probe 101 is stopped 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 torsion angle input from the input device 106.

[0005]

SUMMARY OF THE INVENTION However, FIGS.
In the conventional apparatus as shown in FIG. 3, the torsion angle must be measured visually, and this measured value must be artificially input to the calculation device. Also, 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.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a three-dimensional hole position measuring apparatus which does not require any personnel for measuring and inputting the torsion angle and has improved measurement accuracy.

[0007]

The present invention which has solved the above problems is as follows. <Invention according to 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 end of the hole to be measured to the entrance. It has a tubular member attached to the entrance of the hole and through which the tip of the probe is inserted at the end of lifting of the probe. The inner peripheral surface of the tubular member and the outer peripheral surface of the probe distal end are described below. A three-dimensional position measuring device for holes, characterized by satisfying the following relationship: A convex portion protruding toward the other surface is formed on one of the surfaces, and the other surface (the other surface) is not the surface on which the convex portion is formed.
A guide portion extending over the entire circumference in a diagonal direction around the circumference is formed, and when the distal end portion of the probe is inserted into the tubular material, the protrusion and the guide portion abut in the axial direction, The contact position moves to or stays at a predetermined position along the guide portion.

<Invention of Claim 2> A tubular member is provided with an outer tubular member connected to an inlet of a hole, and is slidable in an axial direction inside the outer tubular member so as to be non-rotatable around the axis. 3. The hole 3 according to claim 1, wherein said hole 3 comprises
A dimensional position measurement device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. As shown in FIG. 1, the measuring device according to the present embodiment is an accelerometer (not shown) in the X-axis and Y-axis directions, similar to the conventional device, and the X-axis and the Y-axis are orthogonal to the horizontal direction. .)
And a three-axis (X-axis, Y-axis, and Z-axis) type gyroscope (not shown) mounted inside, and a probe 1 provided with center risers 8, 8,...
And a cable 2 for pulling up the probe 1 from the terminal end HE of the hole H to be measured to the entrance HS (the numbers in parentheses in the figure are reference numerals in the present embodiment. However, the same drawings are used to clarify the correspondence with the conventional device, and it does not mean that each device has the same configuration as the conventional device. Will be clarified in the following description.) However, unlike the conventional apparatus, the tubular member 3 is fixed to the hole entrance HS instead of the angle scale plate 103, and the shape of the outer peripheral surface of the probe 1 is changed.

<Tubular Material> FIG. 4 is a partially cutaway perspective view of a hole entrance HS, FIG. 5 is a longitudinal sectional view of the tubular material 3, and FIG.
The plan view of the tubular member 3 is shown in FIG. As shown in FIG. 4, the casing 12 is inserted into the ground G at the hole entrance HS portion toward the axial direction of the hole H. The casing 12 is provided with a tubular member 3 composed of an outer tubular member 9 and an inner tubular member 10 provided inside and through which the distal end portion 1A of the probe 1 can be inserted. The outer tubular member 9 is shown in FIG.
As shown in FIG. 6, the distal end portion extends outward, and a tubular screw stop portion 21 extending toward the base end portion is provided at the distal end portion of the expanded portion. The screw fixing portion 21 is adapted to screw the screws 11, 11, and the heads 11 </ b> A, 11 of the screwed screws 11, 11 are screwed.
A presses the casing 12 from both sides to fix the outer tubular member 9 to the casing 12. A key 22 is formed on the inner peripheral surface of the outer tubular member 9 so as to project toward the outer peripheral surface of the inner tubular member 10, and a key groove 23 into which the key 22 is inserted is formed on the outer peripheral surface of the inner tubular member 10. It is formed in the direction of the center. This key 22 and keyway 2
By the action of 3, the outer tubular member 9 and the inner tubular member 10 are
Although it does not rotate relatively around the axis, it is slidable in the axial direction. However, since the distal end portion of the inner tubular member 10 extends outward in the same manner as the outer tubular member 9, the sliding that the inner tubular member 10 falls out of the outer tubular member 9 into the hole H is prevented. . The function and effect of the inner tubular member 10 configured to be slidable in the axial direction of the outer tubular member 9 will be described later.

<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 directed toward one of the surfaces and toward the other. A protruding convex portion is formed, and a guide portion that extends over the entire circumference in a diagonal direction around the circumference is formed on a surface (the other surface) that is not the surface where the convex portion is formed, and the probe of the probe is formed on the tubular member. When the distal end portion is inserted, the convex portion and the guide portion abut in the axial direction, and the abutting position is
It needs to be configured so as to move to or stay at a predetermined position along the guide portion.

As an example of this configuration, in the present embodiment, as shown in FIGS. 4 to 6, a convex portion protruding toward the outer peripheral surface of the probe distal end portion 1A is formed on the inner peripheral surface of the inner tubular member 10. 24, and a guide portion 2 protruding from the outer peripheral surface of the probe distal end portion 1A obliquely around the entire circumference.
5 was formed. Although the guide portion 25 can be formed by directly changing the shape of the outer peripheral surface of the probe tip portion 1A, in the present embodiment, 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 portion 1A. (Note that the notched tube functions as a guide portion when attached to the probe, so the notched tube and the guide portion have the same sign.) .

The notch of the notch tube 25 extends obliquely around the circumference of the probe tip 1A when attached to the probe tip 1A, and gradually extends from the tip 25a as shown in FIG. The guide portion 26 has a large notch amount, and a locking portion 27 at a point where the notch amount is the largest and into which the convex portion 24 can be inserted in the axial direction. I have. 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. The contact position is the guiding portion 26 (guide portion 2).
It moves to a predetermined position along 5), that is, to the locking portion 27. When observing the state in which this contact position moves as a whole, the inner tubular member 10 on which the convex portion 24 is formed has the key 22
Since the probe 1 does not rotate around the axis due to the action of the key groove 23, the probe 1 reaches a predetermined position around the axis based on the contact force between the convex portion 24 and the guide portion 26 (guide portion 25) ( The projection 24 rotates until the projection 24 is locked by the locking portion 27). The contact start position (FIG. 7)
In the case of, point P. ) Is the locking portion 27, the probe 1 does not naturally rotate.

In the present embodiment, the shape of the guiding portion 26 is curved, but the guiding portion 26 is not limited to this shape but may be a straight line or the like. When the probe distal end portion 1A is inserted into the inner tubular member 10, any shape may be used as long as the contact position with the convex portion 24 moves to a predetermined position. Further, the locking portion 27 is provided at the point where the cutout amount of the cutout tube 25 is the largest, but it is not intended that the formation of the locking portion 27 is 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, the probe side (probe tip 1A
Is provided on the outer peripheral surface of the tubular member (the inner tubular member 1).
A guide portion composed of a guide portion 31 and a locking portion 32 can be provided on the inner peripheral surface of the zero (0). In this embodiment, when the probe distal end portion 1A is inserted into the inner tubular member 10, the convex portion 30 and the guide portion 31 abut in the axial direction (FIG. 8).
In the case of, contact at point P. ), This contact position is at a predetermined position along the guiding portion 31, that is, the locking portion 3
Move to 2.

<Measurement Method> A method of measuring a three-dimensional position of a hole using the above-described apparatus will be described below with reference to FIG. In the measurement, first, the outer tubular member 11 is fixed to the casing 12 inserted into the hole entrance HS by screws 11,11. Next, the tip 1A of the probe 1 is inserted through the inner tubular member 10 to lock the projection 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 draw 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 entrance HS. At the time of lifting, the end H of the hole is measured by an accelerometer mounted on the probe 1.
The inclination angles around the X axis and Y axis of E are measured,
X-axis by gyroscope mounted in probe 1,
Angular velocities around the Y-axis and the Z-axis are continuously measured, and these measurement values are correlated with the distance from the hole entrance HS measured based on the rotation speed of the pulley 5 via the cable 2 and a calculation device. 7 is transmitted. 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 around. Therefore,
The work of measuring and inputting the twist angle is not required, and the measurement error of the twist 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 The collision with the portion 27) is reduced, and the protrusion 24 and the guide portion 25 are prevented from being damaged. 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, but in the present embodiment, there is no such risk.

The calculation device 7 calculates the change of the inclination angle based on the inclination angle and the angular velocity transmitted from the probe 1, and calculates the change of the inclination angle and the distance from the hole entrance HS to the hole from the hole entrance HS. The three-dimensional position of the hole H toward the terminal HE is calculated.

[0017]

According to the present invention, there is provided a three-dimensional position measuring apparatus for a hole which does not require a person for measuring and inputting a torsion angle and has improved measurement accuracy.

[Brief description of the drawings]

FIG. 1 is an arrangement diagram of an apparatus for measuring a three-dimensional position of a hole.

FIG. 2 is a partially cutaway perspective view of a device according to a conventional embodiment.

FIG. 3 is an angle scale plate.

FIG. 4 is a partially cutaway perspective view of the device according to the present embodiment.

FIG. 5 is a longitudinal sectional view of a tubular member.

FIG. 6 is a plan view of a tubular member.

FIG. 7 is an explanatory diagram showing movements of an inner tubular member, an outer tubular member, and a guide portion.

FIG. 8 is a schematic explanatory view showing a modified example of a probe tip and an inner tubular member.

[Explanation of symbols]

1 ... probe, 1A ... probe tip, 2 ... cable,
3 ... tubular material, 4 ... winch, 5 ... pulley, 7 ... calculation device,
8 ... leaf spring, 9 ... outer tubular material, 10 ... inner tubular material, 11
... screws, 20 ... casing, 21 ... screw stoppers, 22 ...
Keys, 23: key groove, 24: convex portion, 25: guide portion (notched tube), 26: guide portion, 27: locking portion, 30: convex portion, 31: guide portion, 32: locking portion, 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, 11
0: insertion gauge, 111: screw, G: ground, H: hole, H
E: hole end, HS: hole entrance.

Claims (2)

[Claims] 1. A three-dimensional position measuring apparatus for a hole, comprising: a probe on which an accelerometer and a gyroscope are mounted; and a cable for lifting the probe from an end of the hole to be measured to an entrance. At the inlet, and has a tubular member through which the tip of the probe is inserted at the end of lifting the probe, the inner peripheral surface of the tubular member and the outer peripheral surface of the probe distal end have the following relationship: A three-dimensional position measuring device for a hole characterized by filling. A convex portion protruding toward the other surface is formed on one of the surfaces, and the other surface (the other surface) is not the surface on which the convex portion is formed.
A guide portion extending over the entire circumference in a diagonal direction around the circumference is formed, and when the distal end portion of the probe is inserted into the tubular material, the protrusion and the guide portion abut in the axial direction, The contact position moves to or stays at a predetermined position along the guide portion. 2. An outer tubular member connected to an entrance of a hole, and an inner tubular member provided inside the outer tubular member so as to be slidable in the axial direction and non-rotatably about the axial center. The three-dimensional position measuring device for a hole according to claim 1, which is configured.