JP2007155377A - Method of measuring porous passage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for accurately measuring a hole position of an excavated hole. <P>SOLUTION: After pressing a probe 2 into the deepest part of the excavated hole 1, sensor data of the probe 2 and cable speed data are stored, while pulling out the probe 2 by using a cable. When pulling out the probe 2 up to the inlet of the excavated hole 2, storage of the sensor data is finished, and the stored sensor data are operated with a time base in the reverse direction, to thereby calculate the attitude, the azimuth angle and the position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hole measurement method, and more particularly, to a novel improvement for obtaining an improvement in the measurement position accuracy of a hole by pushing the probe to the deepest part of a drilling hole and then measuring while pulling out the probe.

Conventionally, this kind of hole measurement method used in-house is manufactured in-house, so patent literature is not disclosed. However, the probe calculates the posture and azimuth and pushes the probe into the drilling hole. While measuring.
That is, from the attitude angle (pitch angle: θ) and azimuth angle (ψ) measured with the probe while actually pushing the probe, and the cable speed data (movement distance per unit time: V) obtained from the cable measuring instrument, The hole position is calculated by the following formula.
Horizontal distance (X) = ∫ {Cos (ψ) × V} dt
Horizontal distance (Y) = ∫ {Sin (ψ) × V} dt
Vertical position (Z) = ∫ {Sin (θ) × V} dt

  That is, the horizontal distances X and Y and the vertical position Z described above were obtained by measurement along the measurement coordinates of the excavation hole 1 shown in FIG.

Since the conventional hole measurement method is configured as described above, the following problems exist.
That is, in the conventional method, as shown in FIG. 4, since the probe 2 was measured while being pushed into the borehole 1, it is difficult to push the probe 2 along the borehole 1. When an angle difference δψ occurs between the probe center line 4 and the horizontal error distance (Y) = ∫ {Sin (δψ) × V} dt shown in FIG. It was supposed to decline.

  According to another aspect of the present invention, there is provided a hole measuring method in which a probe is moved using a cable in a drilling hole to measure a hole position of the drilling hole, and the probe is moved to the deepest part of the drilling hole. It is a method of performing the measurement while pulling out the probe after pushing in, and when pulling out the probe, only storing the sensor data of the probe and the cable speed data of the cable, the posture / azimuth angle of the probe and The position is not calculated, and when the probe is pulled out to the entrance of the excavation hole, the storage of the sensor data is terminated, and the stored sensor data is calculated from the storage time later, so that the measurement is performed. This is a method of performing measurement by taking a measurement base point at the entrance of the excavation hole.

Since the hole measuring method by this invention is comprised as mentioned above, the following effects can be acquired.
That is, after pushing the probe to the deepest part of the drilling hole, measurement is performed while pulling out the probe. By calculating the attitude, azimuth and position of the measurement data in the reverse direction of the time axis, The line and the probe center line coincide with each other, and it is possible to measure the posture, the azimuth and the position with reference to the entrance of the excavation hole with high accuracy regardless of the improvement of the measurement position accuracy and the measurement while pulling out.

  It is an object of the present invention to provide a hole measurement method that improves the measurement position accuracy of a hole by pushing the probe to the deepest part of a drilling hole and then measuring while pulling out the probe. .

Hereinafter, preferred embodiments of a hole measuring method according to the present invention will be described with reference to the drawings.
Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.
In FIG. 1, reference numeral 1 denotes a drilling hole drilled by an excavator (not shown), and a probe 2 installed in the drilling hole 1 detects a cable relay 10 and cable speed data 11. The cable 14 is pulled out from the excavation hole 1 by a cable 14 wound by a cable winder 13 through a cable length measuring device 12.

The operation of the cable winder 13 is controlled by a calculation unit 15 connected to the cable length measuring device 12 and the cable winder 13.
As shown in FIG. 2, the probe 2 A / D-converts data 20a and 21a from the orthogonal three-axis angular velocity meter 20 and the orthogonal three-axis accelerometer 21 with a control circuit. 23, the sensor data 24 is sent from the cable 14 to the second communication circuit 30 of the computing unit 15 via the first communication circuit 25, and is configured to receive the power supply 26 from the cable 14.

The arithmetic unit 15 includes an input circuit 32 for receiving the cable speed data 11 and inputting it to the arithmetic / display circuit 31, and a display 32 a and a storage circuit 33 connected to the arithmetic / display circuit 31. Yes.
A power supply 41 from the main power supply 40 is connected to the calculation unit 15 and the power supply 26.

Next, the case where hole measurement is performed in the above-described configuration will be described.
First, the probe 2 is inserted into the excavated hole 1, the probe 2 is pushed to the deepest part of the excavated hole 1, and the hole position is measured while the probe 2 is pulled out.

  When the probe 2 is pulled out, the calculation unit 15 only stores the sensor data 24 of the probe 2 and the cable speed data 11 of the cable 14, and does not calculate the attitude / azimuth or position of the probe 2, When the probe 2 is pulled out to the entrance 1a of the excavation hole 1, the storage of the sensor data 24 is terminated, and the stored sensor data 24 is calculated from the later storage time so that the hole position of the excavation hole 1 is obtained. The measurement base point 1A of this measurement can be taken at the entrance 1a of the excavation hole 1 for measurement. That is, unlike the conventional method, since the excavation hole center line 3 and the probe center line 4 coincide with each other, the accuracy of the hole position measurement by the probe 2 can be improved.

  The present invention is applicable not only to hole measurement but also to position measurement of grooves, sewage and the like.

It is a block diagram which shows the hole measuring method by this invention. It is a specific block diagram of the principal part of FIG. It is explanatory drawing which shows the conventional measurement coordinate. It is explanatory drawing which shows the probe in the conventional excavation hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Excavation hole 1a Entrance 1A Measurement base point 2 Probe 11 Cable speed data 12 Cable length measuring device 13 Cable winder 14 Cable 15 Operation part 24 Sensor data

Claims (2)

In the hole measurement method in which the probe (2) is moved using the cable (14) in the excavation hole (1), and the hole position of the excavation hole (1) is measured,
A hole measuring method, wherein the measurement is performed while the probe (2) is pulled out after the probe (2) is pushed to the deepest part of the excavation hole (1).   When pulling out the probe (2), only the sensor data (24) of the probe (2) and the cable speed data (11) of the cable (14) are stored, and the posture, azimuth and position of the probe (2) are stored. When the probe (2) is pulled out to the entrance (1a) of the excavation hole (1), the storage of the sensor data (24) is terminated and the stored sensor data (24) is stored. 2. The channel measurement according to claim 1, wherein the measurement is performed with the measurement base point (1 A) of the measurement taken at the entrance (1 a) of the excavation hole (1 a) by calculating from the storage time that is later. Method.

Images