JPH09203633A - Inclination-measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct a guide roller of an inclination sensor when the guide roller comes off a guide groove of a platform, by burying a casing pipe underground, setting the platform on the ground, and positioning the inclination sensor at a measurement standby position in the platform. SOLUTION: A proximity sensor detects whether or not a guide roller of an inclination sensor 1 raised in a platform 12 comes off a guide groove. When the guide roller comes off the guide groove, the platform 12 is rotated until the guide roller agrees with the guide groove of a casing pipe 11. The inclination sensor 1 is sent down into the casing pipe 11. Then, the platform 12 is rotated to an original position and, a probe is pulled up into the platform 12, when a process is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt measuring device using an inclinometer for measuring a horizontal displacement in the ground due to an influence of a landslide or the like by using a boring hole formed in the ground.

[0002]

2. Description of the Related Art An inclinometer measures the amount of ground displacement caused by landslides and the like, and is inserted into a casing pipe installed in a boring hole formed in the ground,
By measuring the inclination of the point where the boring hole is formed, the displacement in the ground in the horizontal direction is measured. As shown in FIG. 10, a probe 2, an X tilt sensor 3A that measures the tilt in the X direction on a plane perpendicular to the longitudinal direction of the probe 2, and a Y tilt sensor 3 that measures the tilt in the Y direction.
B and guide rollers 4 provided at both ends of the probe 2.
It consists of A and 4B. The distance between the guide rollers 4A and 4B is set to about 50 cm. Also, the guide roller 4
A has a pair of rollers 40A and 41A, and the guide roller 4B has a pair of rollers 40B and 41B.

[0003] The inclination measurement using such an inclinometer 1 is performed as follows. First, a boring hole is formed in the ground, and the guide groove 11 is formed in this boring hole as shown in FIG.
A casing pipe 11 having A, 11B, 11C and 11D is buried. Further, a platform 12 as shown in FIG. 7 for positioning the inclinometer 1 at the measurement standby position on the ground is connected to the casing pipe 11. A guide groove is formed in the platform 12 similarly to the casing pipe 11. And the guide roller 4 of the inclinometer
The inclinometer 1 is inserted into the casing pipe 11 by engaging A and 4B with any two of the guide grooves 11A, 11B, 11C and 11D. A wire 6 is connected to the inclinometer 1, and the wire 6 connects the casing pipe 1
The inclinometer 1 inserted in 1 is moved up and down.

After lowering the inclinometer 1 to the bottom of the borehole, the inclinometer 1 is sequentially pulled up by the wire 6 to measure the inclination at a plurality of measurement points along the borehole. That is, the point P, which is an intermediate point between the X tilt sensor 3A and the Y tilt sensor 3B in the inclinometer 1, is made to coincide with the measurement point set in the boring hole, and the tilt angles in the X direction and the Y direction at the measurement point are set. Are measured by the X tilt sensor 3A and the Y tilt sensor 3B, respectively, and the displacement of the boring hole at the measurement point is measured by a computing device such as a microcomputer connected to the inclinometer 1 based on the measured tilt angle. . Since the distance between the guide rollers 4A and 4B of the inclinometer 1 is about 50 cm, the measuring point in the casing pipe 11 is about 50 cm.
It is set every other time. Then, this displacement is measured at each measurement point, and the inclinometer 1 is inverted 180 ° to perform the same measurement. From the measurement result, the bottom of the boring hole is accumulated as a fixed point to measure the displacement in the ground. is there. Then, the inclination of the boring hole is measured with time, and the degree of landslide is measured from the displacement amount of the ground at the position of the boring hole.

[0005]

However, during the measurement by the inclinometer described above, the guide rollers 4A and 4B are guided by the guide grooves 11A, 11B and 11 of the casing pipe 11.
You may get out of the C and 11D. When the guide rollers 4A and 4B are derailed in this way, the value measured by the inclinometer 1 becomes inaccurate, and the inclination of the ground cannot be accurately measured.

An object of the present invention is to provide an inclination measuring device using an inclinometer capable of correcting the wheel disengagement of the guide roller and obtaining an accurate amount of inclination.

[0007]

FIG. 1 shows an embodiment of the present invention.
From FIG. 7 and FIG. 10, the present invention will be described. In the present invention, a casing pipe 11 having guide grooves 11A, 11B, 11C and 11D is buried in the ground, and a guide groove connected to the guide groove is provided on the ground. Install the platform 12 having 12A, 12B, 12C, 12D, and guide roller 4
The inclinometer 1 having the A and 4B and the probe 2 is positioned in the platform 12 at the measurement standby position, and the inclinometer 1 is guided while guiding the guide rollers 4A and 4B in the guide groove.
It is applied to an inclination measuring device that guides the to the measurement position. Then, the detecting means 27A, 27B for detecting whether or not the guide rollers 4A, 4B are derailed from the guide groove of the platform 12, and the guide rollers 4A, 4B in the platform 12 are guided by the detecting means 27A, 27B. , 12B, 12C, 12D is detected, the guide rollers 4A, 4B are guided into the guide grooves 11A, 11B, 11C, 1 of the casing pipe 11.
It is characterized by being provided with returning means 13, 30, 31, 44 for returning to 1D.

The inclination measuring device according to the present invention comprises the detecting means 2
Guide rollers 4A, 4B of the inclinometer 1 by 7A, 27B
Are the guide grooves 12A, 12B, 12 of the platform 12.
It is detected whether or not the wheels are derailed from C and 12D, and when the wheels are derailed, the guide rollers 4A and 4B are returned so as to be returned to the guide grooves 11A, 11B, 11C and 11D of the casing pipe 11. The positions of the guide rollers 4A and 4B are corrected by the means 13, 30, 31, and 44.

In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used to make the present invention easy to understand. However, the present invention is not limited to the embodiment.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a tilt measuring device according to the present invention, FIGS. 2 and 3 are enlarged views of a lower main part of the platform, and FIGS. 4 and 5 are enlarged views of an upper main part of the platform. As shown in FIG. 1, an inclination measuring device according to an embodiment of the present invention is a casing pipe 11 embedded in a boring hole formed in the ground, and is rotatably connected to the casing pipe 11 to incline on the ground. Platform 12 for positioning the total 1 in the measurement standby position
And an elevating mechanism for elevating and lowering the inclinometer 1 in the casing pipe 11 and the platform 12 by winding or unwinding the wire 6 connected to the inclinometer 1 and an arithmetic circuit for calculating the inclination measurement result by the inclinometer 1. The controller 13 is provided. Since the inclinometer 1 has been described with reference to FIG. 10, detailed description thereof will be omitted here.

As shown in FIGS. 6 and 7, the casing pipe 11 and the platform 12 have guide grooves 11A, 1
1B, 11C, 11D and guide grooves 12A, 12B,
12C, 12D are formed, and the guide grooves 12A, 12B,
12C and 12D are guide grooves 11A, 11B and 1 at normal times.
The platform 12 is positioned so as to match with 1C and 11D. As shown in FIGS. 2 and 3, the platform 12 is supported by the flange 20. A pulley 23 is provided above the flange 20 in the bearing holder 24, and the pulley 23 is provided close to the bearing holder 24.
0 is provided. A belt (not shown) is wound around the pulley 23 and the pulley 31 of the motor 30,
When 0 is driven, the pulley 23 rotates, which causes the platform 12 to rotate. A sensor holder 26 is provided between the flange 20 and the bearing base 25, and the sensor holder 26 has a proximity switch (SW) for detecting the positions of the guide rollers 4A and 4B of the inclinometer 1.
27A and 27B are provided. The sensor holder 26 is protected by a sensor cover 28 so as to prevent dust and the like from entering. The drive of the motor 30 is controlled by the control device 13 described above.

On the other hand, as shown in FIGS. 4 and 5, a head collar 41 guided by a bearing 40 so as to move up and down is provided at the upper end of the platform 12. The head collar 41 is biased downward by the springs 42a and 42b, and is positioned at the position shown by the broken line in FIG. 4 when the inclinometer 1 is descending. Head color 4
Sensor 4 with limit switch 44 close to 1.
3 are provided. Then, when the inclinometer 1 rises to come into contact with the head collar 41 and the head collar 41 moves upward, the limit switch 44 is turned on and the sensor 43
Detects that the inclinometer 1 has been positioned at the standby position within the platform 12.

Next, the operation of the embodiment of the inclination measuring apparatus according to the present invention will be described. FIG. 8 is a flow chart for explaining the operation of the tilt measuring device. First, the inclinometer 1 is lowered into the casing pipe 11 to measure the inclination, and then the control device 13 winds the wire 6 and pulls it up into the platform 12. Then, in step S1, the sensor 43 determines whether or not the limit switch 44 is turned on. If the limit switch 44 is not turned on, the wire 6 is further wound until the limit switch 44 is turned on. When the sensor 43 detects that the limit switch 44 is turned on in step S1, it determines whether or not the guide roller 4B is detected by the proximity switches 27A and 27B in step S2. When the guide rollers 4B are detected by the proximity switches 27A and 27B, the guide rollers 4A and 4B move to the platform 1
The process is terminated on the assumption that the two guide grooves 12A, 12B, 12C and 12D have not been removed.

When the inclinometer 1 is pulled up until the limit switch 44 is turned on, the lower roller 40B of the lower guide roller 4B is moved to the proximity switch 27A or 27.
The dimensions of each part are determined so that they are at the same height position as B. In this embodiment, the inclinometer 1 is inverted 180 degrees after the first measurement so that the data is sampled twice. Therefore, in the first measurement, the proximity switch 27B is connected to the roller 40B. The proximity switch 27A faces the roller 4 in the second measurement.
Facing 0B.

On the other hand, when the guide rollers 4B are not detected by the proximity switches 27A and 27B, the guide rollers 4A and 4B are guided by the guide groove 12 of the platform 12.
In step S3, the following processing is performed assuming that the wheels have been derailed from A, 12B, 12C, and 12D.

FIG. 9 is a sectional view of the platform 12 for explaining the processing in step S3. In step S2, when the guide roller 4B which should be in the normal state (FIG. 9A) is not detected by the proximity switches 27A (at the time of the first measurement) and 27B (at the time of the second measurement) (FIG. 9). (B)), the motor 30 is driven to rotate the pulley 23 by the belt, and the guide roller 4B of the inclinometer 1 moves the proximity switch 27A (during the first measurement), 2
The platform 12 is rotated until it is detected by 7B (during the second measurement) (FIG. 9 (c)). The guide rollers 4A and 4B rotate together with the platform 12 due to the contact resistance with the platform 12, and the rotation angle position thereof is changed. When the guide roller 4B is detected by the proximity switches 27A (during the first measurement) and 27B (during the second measurement), the driving of the motor 30 is stopped and the rotation of the platform 12 is stopped. Next, in step S4, the wire 6 is unwound, and the inclinometer 1 is moved to the platform 1
2 into the casing pipe 11 (Fig. 9
(D)).

Here, at the position where the guide roller 4B of the inclinometer 1 is detected by the proximity switches 27A and 27B, the positions of the guide rollers 4A and 4B correspond to the guide grooves 11A, 11B, 11C and 11D of the casing pipe 11. When the inclinometer 1 is lowered into the casing pipe 11 because it is positioned to be guided by any two guide rollers 4A,
4B is guided by any two of the guide grooves 11A, 11B, 11C, 11D, that is, the derailed state is corrected. When the inclinometer 1 is lowered into the casing pipe 11 and the platform 12 is emptied, in step S5, the motor 30 is driven in the direction opposite to that in step S3 (FIG. 9 (d)), and the platform 12 is moved to its original position. , That is, the guide groove 12 of the platform 12
The platform 12 is rotated to a position where the A, 12B, 12C, 12D and the guide grooves 11A, 11B, 11C, 11D of the casing pipe 11 coincide with each other (FIG. 9).
(E)).

Next, in step S6, the inclinometer 1 is pulled up until the limit switch 44 is turned on and the process returns to step S1. If step S2 is affirmed, the process ends. As a result, the guide rollers 4A and 4B are corrected so as to be properly guided in the guide groove of the casing pipe 11.

Since the above-mentioned inclination measuring device is usually installed in the measuring site for a long time and samples data at predetermined time intervals under the control of the controller 13, the above-mentioned guide roller position correcting work is data-sampled. It is desirable to always carry out at the time of, but it may be carried out at a time other than the data sampling. Further, when the tilt measurement is performed by manned operation, the guide roller position correction work may be performed according to the instruction of the operator.

In the above-described embodiment, the position of the guide roller 4B is detected by the proximity switches 27A and 27B, but the proximity switches 27A and 27B are used.
Alternatively, it may be a mechanical switch. Alternatively, the rotational angle positions of the guide rollers 4A and 4B may be detected by detecting the rotational direction positions of the other members of the inclinometer 1. Furthermore, the case where the X and Y tilt sensors are mounted has been described, but the present invention can be applied to a tilt measuring device that mounts only one of the tilt sensors.

In the correspondence between the above embodiment and the claims, the proximity switches 27A and 27B constitute detection means, and the control device 13, the motor 30, the pulley 31, the pulley 23 and the limit switch 44 constitute return means.

[0022]

The inclination measuring device according to the present invention detects whether the guide roller of the inclinometer is wheeled from the guide groove in the platform, and when the wheel is being wheeled, the guide roller is guided to the guide groove. Since the guide roller is not derailed from the guide groove when the tilt is measured by the inclinometer, the tilt can always be measured accurately.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a tilt measuring device according to an embodiment of the present invention.

[Fig. 2] Enlarged view of the lower part of the platform

[Fig. 3] Enlarged view of the lower part of the platform

[Fig. 4] Enlarged view of the upper part of the platform

[Fig. 5] Enlarged view of the upper part of the platform

FIG. 6 is a sectional view of a casing pipe.

FIG. 7 Cross-section of the platform

FIG. 8 is a flowchart showing a process for correcting the derailment of the guide roller.

FIG. 9 is a diagram showing a state in which derailment of a guide roller is corrected.

FIG. 10 is a diagram showing a configuration of an inclinometer.

[Explanation of symbols]

 1 inclinometer 2 probe 3A X inclination sensor 3B Y inclination sensor 4A, 4B guide roller 6 wire 10 boring hole 11 casing pipe 11A-11D, 12A-12D guide groove 12 platform 13 control device 23, 31 pulley 27A, 27B proximity switch 30 Motor 40A, 41A, 40B, 41B Roller 44 Limit switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Tadashi Tadashi, No. 1 Shino Nishi Goshota-cho, Kita-ku, Kyoto City Stock Company Shimadzu Shino Plant

Claims (1)

[Claims] 1. A casing pipe having a guide groove is buried in the ground, a platform having a guide groove connected to the guide groove is installed on the ground, and an inclinometer having a guide roller and a probe is installed on the platform. In the tilt measuring device, the guide roller is positioned at a measurement standby position, and the inclinometer is guided to the measurement position while guiding the guide roller in the guide groove. The guide roller in the guide groove of the casing pipe when the guide roller in the platform detects that the guide roller is derailed from the guide groove. And a return means for returning to the tilt measuring device.