JP4792600B2 - Hole measurement method and apparatus - Google Patents

Description

  The present invention relates to a hole measurement method and apparatus, and in particular, provides a reference table at a lateral position of a drilling hole, and measures the drilling hole using a measurement reference azimuth as a reference azimuth when a probe is installed on the reference table. The present invention relates to a novel improvement for removing the initial orientation setting error of measurement and improving measurement accuracy.

Conventionally, as this kind of hole measuring method and apparatus used, patent documents and the like are not shown, but the configurations shown in FIGS. 4 to 7 can be exemplified.
In FIG. 4, a reference numeral 1 is a probe provided movably in the excavation hole 2, and a cable 3 connected to the probe 1 is connected via a cable relay 4 and a cable length measuring device 5. The winder 6 is configured to wind up.

  The cable speed 5 a from the cable length measuring device 5 and the probe data 1 a from the cable winder 6 are taken into the calculation unit 7.

  The probe 1 is configured as shown in FIG. 5, and a triaxial angular velocity meter 10 and an accelerometer 11 are connected to a control circuit 13 via an A / D converter 12, and data 13a from the control circuit 13 is the first The signal is input from the first communication circuit 14 to the second communication circuit 15 of the arithmetic unit 7 via the cable 3.

  In the arithmetic unit 7, the second communication circuit 15 is connected to an arithmetic / display circuit 18 having a display 16 and a storage circuit 17, and the cable speed 5 a from the cable length measuring device 5 is passed through an input circuit 19. This is input to the arithmetic / display circuit 18.

In the above-described configuration, the posture / azimuth angle calculation is performed based on the probe data 6 of the angular velocity and acceleration obtained by the probe 1, and the cable speed 5a is measured by the cable length measuring device 5, and these are combined. The path of the excavation hole 2 is measured by the calculation unit 7.
That is, excavation is performed according to the following procedure.
(1) Excavate.
(2) Measure the attitude angle, azimuth angle, and path of the excavation hole based on the entrance azimuth reference of the excavated hole.
(3) Re-digging toward the target position based on the measurement result.
(4) Repeat (2) and (3) above.

In addition, as shown by the measurement coordinates in FIGS. 6 and 7, the path calculation is performed by the attitude angle (pitch angle: θ) and azimuth angle (Ψ) measured by the probe 1 and the speed obtained from the cable length measuring device 5. From the (movement distance per unit time: V) data, the hole path (X, Y, Z direction position) is calculated by the following equation.
Horizontal distance (X) = ∫ {Cos (Ψ) × V} dt
Horizontal distance (Y) = ∫ {Sin (Ψ) × V} dt
Vertical position (Z) = ∫ {Cos (θ) × V} dt

Since the conventional hole measurement method and apparatus are configured as described above, the following problems exist.
That is, when measurement and excavation are repeated, if the entrance of the excavation hole is fixed, the reproducibility of the measurement standard when repeating the measurement is obtained. However, the entrance of excavation often moves during the excavation process, and the amount of movement cannot be detected, resulting in an increase in measurement error. If the azimuth angle error due to the movement of the entrance of the excavation hole is ΔΨ, the horizontal position is given by the following equation, and the azimuth angle error ΔΨ is affected.
Horizontal distance (X) = ∫ {Cos (Ψ + ΔΨ) × V} dt
= {(CosΨCosΔΨ + SinΨSinΔΨ) × V} dt
Horizontal distance (Y) = ∫ {Sin (Ψ + ΔΨ) × V} dt
= {(SinΨCosΔΨ + CosΨSinΔΨ) × V} dt

The method and apparatus for measuring a hole path according to the present invention uses a probe having an angular velocity meter and an accelerometer that moves through a borehole, performs a posture / azimuth calculation by a calculation unit, and determines the cable speed of a cable connected to the probe. In the hole measurement method in which the borehole is measured by a length measuring device and the posture / azimuth and cable speed are calculated, a reference stand is provided at a lateral position of the borehole, and the reference stand deviation between the drilling reference azimuth angle of the have line measurement of the borehole measurement reference azimuth angle when the probe is installed as a reference azimuth, before Symbol measurement reference azimuth and the borehole, in advance measured In this method, the measurement reference azimuth angle measured during the measurement is corrected .
In addition, the hole measuring device according to the present invention uses a probe having an angular velocity meter and an accelerometer that moves in a borehole, performs posture / azimuth calculation by a calculation unit, and determines the cable speed of the cable connected to the probe. In the hole measuring device which is measured by a length measuring device and measures the digging hole by calculating the posture / azimuth angle and the cable speed, it has a reference platform arranged at a lateral position of the digging hole. and, have rows measurement of the borehole a measurement reference azimuth when the probe is placed on the reference table as a reference azimuth, the amount of deviation between the drilling reference azimuth angle before Symbol measurement reference azimuth and the borehole Is a configuration in which measurement is performed in advance and correction is made to the measurement reference azimuth angle measured during the measurement.

Since the hole measuring method and apparatus according to the present invention are configured as described above, the following effects can be obtained.
In other words, a reference base is provided at the lateral position of the drill hole, and the measurement base azimuth when the probe is installed on this reference base is used as a reference azimuth to measure the drill hole and manage so that this reference base does not move. Accordingly, the initial orientation setting error of measurement can be removed, and the measurement accuracy can be improved.

  The present invention provides an initial azimuth setting error in measurement by providing a reference base at a lateral position of the excavation hole and measuring the excavation hole using the measurement reference azimuth angle when the probe is installed on the reference base as a reference azimuth angle. It is an object of the present invention to provide a hole measuring method and apparatus that improve the measurement accuracy.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a hole measuring method and apparatus according to the present invention will be described with reference to the drawings.
In addition, since the same code | symbol is attached | subjected to the same part as a prior art example, and the structure of FIGS. 4-7 is the same also in this invention, it shall use also with respect to this invention.
A reference table 20 is disposed at a lateral position adjacent to the excavation hole 2 shown in FIG. 1, and the probe 1 is disposed on the reference table 20 in a state where the reference table 20 is not moved. To do.
As shown in FIGS. 2 and 3, the reference table 20 is provided with a pair of concave plates 22 on a base plate 21, supported by four support pillars 23, and a probe 1 on each concave plate 22. It is comprised so that can be mounted.

Next, the case where it measures using the above-mentioned measuring system is described.
(Example 1) Measurement while inserting a probe (1) The measurement system and the reference table 20 are installed as shown in FIGS.
(2) The probe 1 is placed on the reference table 20 (probe position (1)), and the measurement reference azimuth angle A is obtained.
(3) The position of the probe 1 is moved to the probe position (2) of the excavation hole 2. During this time, the cable 3 is fixed so that the cable length measuring device 5 does not operate.
(4) From the position of the probe position (2), the posture angle / azimuth angle and path of the excavation hole 2 are measured while the cable 3 is inserted. At this time, the calculation formula is as follows, and the measurement reference azimuth angle A is corrected.
Horizontal distance (X) = ∫ {Cos (Ψ · Ψ0) × V} dt
Horizontal distance (Y) = ∫ {Sin (Ψ · Ψ0) × V} dt
(5) As described above, even if the azimuth shift (ΔΨ) of the entrance (reference position) of the excavation hole 2 occurs in the excavation process, the attitude angle / azimuth angle and path measurement of the excavation hole 2 are not affected by the movement. It becomes possible.

(Example 2) Measurement while pulling out the probe (1) The system and the reference table are installed as shown in FIGS.
(2) The probe 1 is pushed into the deepest part of the excavation hole 2.
(3) Measure while pulling out from the deepest part.
(4) When the probe position (2) is reached, the cable 3 is fixed, and the probe position is moved to the probe position (1) so that the cable length measuring device 5 does not operate.
(5) The measured data is calculated on the basis of the probe position (1), and the attitude angle / azimuth angle and path of the excavation hole 2 are measured. At this time, the calculation formula is as follows, and the measurement reference azimuth angle A is corrected.
Horizontal distance (X) = ∫ {Cos (Ψ · Ψ0) × V} dt
Horizontal distance (Y) = ∫ {Sin (Ψ · Ψ0) × V} dt
(6) As described above, even if the azimuth shift (ΔΨ) of the entrance (reference position) of the excavation hole 2 occurs during the excavation process, the attitude angle / azimuth angle and path measurement of the excavation hole 2 are not affected by the movement. It becomes possible.
The excavation reference azimuth angle B, the measurement reference azimuth angle A, and the difference angle thereof, that is, the deviation amount (Ψ0) are obtained in advance by measurement, and the measurement reference azimuth angle A measured during measurement is corrected.

  The present invention can be applied not only to measurement of hole paths but also to the formation of pipes and grooves.

It is a block diagram which shows the hole measuring method and measuring method of an apparatus by this invention. It is a perspective view which shows the reference | standard stand of FIG. FIG. 3 is a right perspective view of FIG. 2. It is a block diagram of the conventional measurement system. FIG. 5 is a block diagram specifically illustrating the configuration of FIG. 4. It is explanatory drawing which shows the measurement coordinate of the horizontal position of the conventional excavation hole. It is explanatory drawing which shows the measurement coordinate of the vertical position of the conventional excavation hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Probe 2 Drilling hole 3 Cable 5 Cable length measuring device 5a Cable speed 7 Calculation part A Measurement reference azimuth angle 20 Reference stand

Claims (2)

Using the probe (1) that moves through the borehole (2) and has the angular velocity meter (10) and accelerometer (11), the calculation unit (7) performs the posture / azimuth calculation, and is connected to the probe (1). The cable speed (5a) of the cable (3) is measured by the cable length measuring device (5), and the drilling hole (2) is measured by calculating the attitude / azimuth angle and the cable speed (5a). In the measured hole path method,
A reference base (20) is provided at a lateral position of the excavation hole (2), and the excavation hole is set with a measurement reference azimuth angle (A) as a reference azimuth angle when the probe (1) is installed on the reference base (20). There line measurement of (2), the shift amount of the excavation reference azimuth angle (B) and the measurement reference azimuth (a) and the borehole (2) (.phi.0) is measured in advance, at the time of the measurement A method for measuring a hole path , comprising correcting the measured measurement reference azimuth angle (A) . Using the probe (1) that moves through the borehole (2) and has the angular velocity meter (10) and accelerometer (11), the calculation unit (7) performs the posture / azimuth calculation, and is connected to the probe (1). The cable speed (5a) of the cable (3) is measured by the cable length measuring device (5), and the drilling hole (2) is measured by calculating the attitude / azimuth angle and the cable speed (5a). In the measured hole measuring device,
It has a reference table (20) arranged at a lateral position of the excavation hole (2), and the measurement reference azimuth angle (A) when the probe (1) is installed on the reference table (20) is a reference azimuth. the have line measurement of borehole (2) as the angular deviation of the drilling reference azimuth angle (B) and the measurement reference azimuth (a) and the borehole (2) (.phi.0) is measured in advance In addition , the hole measuring device is configured to add correction to the measurement reference azimuth angle (A) measured during the measurement .

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