JP2011149733A - Inclination measurement system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inclination measurement system capable of accurately performing correction even when the orientation (directivity) of an in-pipe inclination measuring device is changed and accurately measuring the inclination of a borehole or a retaining wall.
In an inclination measurement system, a main body 1 of an inclination measuring device for measuring an inclination of an underground boring hole, a retaining wall or a wall surface of a structure, and a gyro sensor 14 mounted in the main body 1 of the inclination measuring device. And an in-pipe inclination measuring apparatus 10 having an inclination sensor, and an inclination measuring center 21 connected via a lead wire 4 for deriving detection information from the in-pipe inclination measuring apparatus 10.
[Selection] Figure 3

Description

  The present invention relates to an inclinometer that measures the inclination of a boring hole, a retaining wall, and a wall surface of a structure, and more particularly, to an inclination measuring system equipped with a gyro sensor.

2. Description of the Related Art Conventionally, inclinometers capable of measuring landslide displacement measurements and wall displacement measurements by measuring the inclination angles of boreholes, mountain retaining walls, and wall surfaces of structures according to depth have been commercialized (Non-Patent Document 1 below). reference). As this kind of inclinometer, uniaxial and biaxial ones are in circulation.
Moreover, the following nonpatent literature 2 can be mentioned as literature about gyro utilization.

Kyowa Technical Report, No. 494, “Inclination Measurement”, pp. 8-13-8-14 Edited by Tamagawa Seiki Co., Ltd., “Introduction to Gyro Utilization Technology”, Industrial Research Committee (2002)

However, the conventional inclinometer is difficult to correct the directionality, and there is no other way but to improve the reliability of the data by performing the mounting so that the directionality does not change. Therefore, there is a problem that accurate data cannot be obtained when the direction of the inclinometer changes in the ground.
In view of the above situation, the present invention provides an inclination measurement system that accurately corrects even when the orientation (directivity) of the in-pipe inclination measurement apparatus changes and accurately measures the inclination in the ground or on the wall surface. For the purpose.

In order to achieve the above object, the present invention provides
[1] In an inclination measurement system, a main body of an inclination measuring device that measures the inclination of the ground or a wall surface, an in-pipe inclination measuring device including a gyro sensor and an inclination sensor mounted in the main body of the inclination measuring device, A tilt measuring center connected via a lead wire for deriving detection information from the in-pipe tilt measuring device.

[2] The inclination measuring system according to [1], wherein the gyro sensor is an optical fiber gyro sensor.
[3] The inclination measuring system according to [1], wherein the in-pipe inclination measuring devices are arranged in multiple stages to perform inclination measurement for each depth of the underground and the wall surface.

According to the present invention,
(1) By arranging the in-pipe inclination measuring device in which the gyro sensor is mounted inside the main body of the inclination measuring device, the direction in which the in-pipe inclination measuring device is inclined can always be accurately detected.
(2) The correction of the direction of the actual in-pipe inclination measuring device can be easily corrected by calibrating the relationship between the direction in which it is facing and the angle.

It is a block diagram of the inclination measuring apparatus which shows the Example of this invention. It is a figure which shows the setting state of the inclination measuring apparatus which shows the Example of this invention. It is a block diagram of the in-pipe inclination measuring apparatus installed in the inside of the main body of the inclination measuring apparatus which shows the Example of this invention. It is a figure which shows the detection principle of the azimuth by the optical fiber gyro sensor of the in-pipe inclination measuring apparatus installed in the inside of the main body of the inclination measuring apparatus which shows the Example of this invention. It is a schematic diagram of the multistage in-pipe inclination measuring apparatus concerning this invention.

  An inclination measuring system of the present invention includes a main body of an inclination measuring device that measures the inclination of the ground and a wall surface, an in-pipe inclination measuring device including a gyro sensor and an inclination sensor mounted in the main body of the inclination measuring device, A tilt measuring center connected via a lead wire for deriving detection information from the in-pipe tilt measuring device.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a block diagram of an inclination measuring apparatus according to an embodiment of the present invention, FIG. 1 (a) is a front view of the main body of the inclination measuring apparatus, and FIG. 1 (b) is a cross section of a guide tube of the inclination measuring apparatus. FIGS. 2A and 2B are views showing the installation state of the inclination measuring apparatus according to the embodiment of the present invention, FIG. 2A is a longitudinal sectional view showing the installation state, and FIG. 2B is FIG. 2A. It is an AA sectional view taken on the line.

  In these drawings, reference numeral 1 denotes a main body of the tilt measuring device, which has a substantially cylindrical shape. 2 is a lower wheel provided in the main body 1 of the inclination measuring device, 3 is an upper wheel provided in the main body 1 of the inclination measuring device, 4 is a lead wire derived from the main body 1 of the inclination measuring device, and 5 is a main body of the inclination measuring device. 1 is inserted into the guide tube, 6 is formed in the guide tube 5, and the locking portion for locking the lower wheel 2 and the upper wheel 3 of the main body 1 of the tilt measuring device 10 is the gyro sensor and the tilt according to the present invention. The in-pipe inclination measuring apparatus which comprises a sensor is shown.

  Here, the main body 1 of the inclination measuring device is configured to be installed in a guide tube 5 that is arranged in advance at an inclination measuring portion of a boring hole 8 in the ground 7 (or may be a retaining wall or a wall of a structure). Has been. In addition, between the wall of the guide pipe 5 and the boring hole 8, a grout is fully constructed so that the ground 7 and the guide pipe 5 can be integrated. Thereafter, the main body 1 of the inclination measuring device with wheels 2 and 3 is inserted into the guide tube 5 to measure the inclination in a certain direction in the ground.

FIG. 3 is a configuration diagram of an in-pipe inclination measuring apparatus installed inside the main body 1 of the inclination measuring apparatus according to the embodiment of the present invention, and FIG. 3 (a) is a diagram showing a state before the inclination, FIG. b) is a diagram showing a state after the inclination. FIG. 4 is a view showing the principle of detecting the azimuth angle by the optical fiber gyro sensor of the in-pipe inclination measuring apparatus.
As shown in these drawings, an in-pipe inclination measuring device 10 is disposed in the main body 1 of the inclination measuring device. In this in-pipe inclination measuring apparatus 10, a weight 12 is suspended from a lower end of a strain generating body (leaf spring) 11, and a strain gauge 13 is bonded to the strain generating body 11. When the main body 1 of the tilt measuring device tilts, the weight 12 tries to maintain its posture by gravity. Therefore, the strain generating body 11 fixed to the main body 1 and the weight 12 of the inclination measuring device causes a deflection, and the strain gauge 13 disposed on the surface changes resistance (output). The relationship between the inclination and the output is calibrated and used as an inclination measuring device with the calibration coefficient.

  An optical fiber gyro sensor 14 is disposed on the bottom surface portion 10 </ b> A of the in-pipe inclination measuring apparatus 10. In FIG. 4, 15 is a ground axis, 16 is an angular velocity detection axis, and in FIG. 3, 21 is connected to the above-described in-pipe inclination measuring apparatus 10 via the lead wire 4, and the inclination at which detection information from each sensor is collected. It is a measurement center. The optical fiber gyro sensor 14 measures an angular velocity and an angle. Since the earth is rotating, the optical fiber gyro sensor 14 in the in-pipe tilt measuring device 10 on the earth detects the rotation of the earth, so if the optical fiber gyro sensor 14 is rotated around the vertical axis, true north is detected. be able to. That is, the azimuth angle of the tilt sensor can always be accurately measured. Therefore, even when the orientation (directivity) of the in-pipe tilt measuring apparatus 10 changes, the in-pipe tilt measuring apparatus 10 can be accurately corrected by detecting the azimuth angle of the in-pipe tilt measuring apparatus 10.

Therefore, according to the present invention, since the optical fiber gyro sensor is mounted, it is possible to appropriately detect the direction in which the in-pipe inclination measuring device is facing. Therefore, it is possible to accurately measure the inclination of an underground borehole or mountain retaining wall.
In the above embodiment, an example in which an optical fiber gyro sensor excellent in mountability is mounted has been described. However, the present invention is not limited to this, and a mechanical angular velocity detection gyro sensor or the like may be used.

Moreover, in the said Example, although the inclination measuring apparatus which has arrange | positioned the single in-pipe inclination measuring apparatus was described, you may make it arrange a some in-pipe inclination measuring apparatus in multistage.
FIG. 5 is a schematic view of a multistage in-pipe inclination measuring apparatus according to the present invention.
The above-described in-pipe inclination measuring apparatus 10 is arranged in a daisy chain in series. Therefore, for example, the inclination for each depth of the borehole, the retaining wall, and the wall surface of the structure can be accurately measured.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The inclination measurement system of the present invention can be used as a tool for measuring the inclination of the underground or the wall surface, which can be accurately corrected even when the orientation (direction) of the in-pipe inclination measurement apparatus changes.

DESCRIPTION OF SYMBOLS 1 Main body of inclination measuring device 2 Lower wheel of main body of inclination measuring device 3 Upper wheel of main body of inclination measuring device 4 Lead wire 5 Guide pipe 6 Locking portion of inclination measuring device 7 Ground 8 Boring hole 10 In-tube inclination measuring device 10A In-tube Bottom part of tilt measuring device 11 Straining body (leaf spring)
12 Weight 13 Strain gauge 14 Optical fiber gyro sensor 15 Ground axis 16 Angular velocity detection axis 21 Tilt measurement center

Claims (3)

(A) a main body of an inclination measuring device that measures the inclination of the ground or a wall surface;
(B) An in-pipe tilt measuring device including a gyro sensor and a tilt sensor mounted in the main body of the tilt measuring device;
(C) An inclination measurement system comprising an inclination measurement center connected via a lead wire for deriving detection information from the in-pipe inclination measurement apparatus.   2. The tilt measurement system according to claim 1, wherein the gyro sensor is an optical fiber gyro sensor.   The inclination measurement system according to claim 1, wherein the in-pipe inclination measurement devices are arranged in multiple stages to perform inclination measurement for each depth of the underground and the wall surface.

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