JP2867949B2 - Inner sky shape measuring machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior shape measuring device for measuring the interior shape of an existing structure or the like.

[0002]

Conventionally, as a light wave measuring device, substantially parallel light is emitted from a light transmitting objective lens, which is a light transmitting unit, to irradiate the object with light, and one of the light irregularly reflected on the object is measured. The part returns and this is condensed by the light receiving objective lens which is the receiving part, and further received by the photodiode, amplifies its signal, and the distance between the transmitted light and the received light is proportional to the distance In order to measure this phase difference with higher accuracy, the received signal is frequency-converted to a low frequency, the phase is compared with a reference phase signal, and the amount of phase delay is digitally measured. There is also known a method of measuring a distance to a measurement object by adding a supplement.
Further, in order to measure the inner space shape of a structure by using this type of measuring device, a device having a horizontal rotation driving means for horizontally rotating a measuring device main body including a transmitting portion and a receiving portion has been developed. By measuring while rotating the measuring machine body,
It is possible to continuously measure the inner space shape of the measurement object.
The inner space shape refers to a cross section of an internal space such as a structure.

As an effective use of this measuring device, a so-called PCL method (Precast Concrete L) in which a thin and lightweight precast lining is provided on the inner surface of the tunnel instead of the conventional cast-in-place concrete lining.
ining). In this method, for example, as known in JP-A-61-186697, etc.
A precast plate is provided on the inner surface of an existing tunnel. Before manufacturing the precast plate, the actual dimensions of the inner surface of the existing tunnel are measured, and a precast plate is manufactured according to the measured dimensions. However, in order to measure the inner space shape of a structure such as a tunnel in this way, with a conventional measuring device, it is necessary to perform measurement at each measurement position so that a cross section is cut into a circle. Since the measurement must be performed by moving the machine in the length direction of the tunnel, there is a problem that it takes time to move and install the measuring machine. In a tunnel or the like, there is a bend gradient, and a device capable of measuring the bend gradient three-dimensionally is desired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inner space shape measuring instrument capable of efficiently measuring a predetermined range of the inner space shape in a short time.

[0005]

According to a first aspect of the present invention, there is provided a measuring method comprising:
An installation section installed at a reference position in the center of the object in the width direction of the inner space,
It is provided in the installation part, and the vertical direction is set as the axis and the horizontal plane is
A plane rotation drive that rotates a plane rotation axis as a rotation plane by 360 °
Moving means and a plane rotation axis of the plane rotation driving means.
Horizontal rotation about the installation part
A horizontal rotation driving means for rotating the shaft by 360 °;
With the measuring unit that measures the distance to the measurement point
The horizontal rotation axis of the horizontal rotation driving means is
The direction of the transmitting part and the receiving part is set to the direction orthogonal to the horizontal rotation axis.
And a measuring device main body fixed to the horizontal rotating shaft.
The axis direction is from the length direction of the measured object to this length direction.
As approaching the orthogonal width direction, the flatness of the plane
In order to gradually reduce the plane rotation angle, the plane rotation drive
The rotation of the moving means is controlled, and the inner space shape is measured three-dimensionally.
The horizontal rotation driving means and the plane rotation driving means.
Measurement by rotating the measuring machine body in the horizontal and horizontal directions.
This makes it possible to define the interior shape without moving the measuring machine.
Measurement can be performed three-dimensionally within a certain range. Also, long
A hollow shape that is long in the vertical direction can be measured accurately.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 5 show a first embodiment of the present invention, in which a measuring instrument includes a measuring instrument main body 1 which is a distance sensor, and the measuring instrument main body 1 uses a reflection light receiving time difference measuring method or the like. A light transmitting objective lens 2 serving as a transmitting unit having a light emitting unit and a light receiving objective lens 3 serving as a light receiving unit are provided side by side in the front-rear direction.
And emits light substantially parallel to the object to be measured, and a part of the light irregularly reflected on the object returns to the measuring instrument body 1 side,
This light is condensed by the light-receiving objective lens 3, and further received by a photodiode to amplify the signal. A phase difference between the transmitted light and the received light is caused by a time delay proportional to the distance. In order to measure this phase difference with higher accuracy, the received signal is frequency-converted to a lower frequency, the phase is compared with the reference phase signal, the phase delay is digitally measured, and the measurement is performed by adding an electric circuit supplement. A distance measurement control unit 4 for calculating a distance to an object is built in. The control means 4
May be provided separately from the measuring device main body 1 and both may be electrically connected by a signal cable or the like.

The rear part of the measuring instrument body 1 is provided with mounting bolts 5.
, The tip of a horizontal rotation shaft 7 is fixed to the rotation plate 6, and the horizontal rotation shaft 7 is turned to a rotation case 9 having a built-in horizontal rotation driving means 8. The horizontal rotation shaft 7 is supported by a pair of bearings 10, 10, and a stepping motor 11 is connected to the base end of the horizontal rotation shaft 7. The horizontal rotation shaft 8 and the stepping motor 11 constitute the horizontal rotation means 8. An encoder 12 serving as an encoder for detecting an amount of rotation of the horizontal rotation shaft 7 is provided at an upper portion in the rotation case 9. A toothed wheel 13 is provided on the shaft of the encoder 12, and the horizontal rotation A toothed wheel 14 is provided on the central base end side of the shaft 8, and a timing toothed belt 15 is mounted on the two toothed wheels 13, 14. A gear 16 is provided at the center end of the horizontal rotation shaft 8, and a shaft 17 is rotatably supported in the rotation case 9 on one side in the left-right direction of the horizontal rotation shaft 8. A gear 18 meshing with the gear 16 is provided at 17, and a stopper piece 18A is provided on the gear 18, and the stopper piece 18A comes into contact with a stopper 19 projecting into the rotating case 9.

A rotating leg is provided at the lower part of the rotating case 9.
21 is provided, and the rotating leg 21 is flatly rotated above the installation portion 22.
A rotating part 23 as an axis is provided, an upper part of the rotating part 23 is fixed to the rotating case 9, and a plane rotating driving means 24 for rotating the rotating part 23 is provided in the installation part 22. , The installation part 22
Has a built-in plane angle detecting means 25 for the rotating case 9. Further, as shown in FIG. 3, the distance measurement control means 4 is provided to a storage operation control means 26 comprising a computer or the like.
And the encoder 12 serving as a horizontal angle detecting means and the plane angle detecting means 25 are electrically connected to each other. Distance data from the measurement control means 4 to the object to be measured is obtained. The data and the plane angle position data of the measuring instrument body 1 are input from the plane angle detection means 25 to the storage operation control means 26, and from the input data, the storage operation control means 26 The reference position is corrected based on the distance from the center of a certain horizontal rotation shaft 7 to the lenses 2 and 3 and the length from the center of the rotation unit 21 which is the plane rotation center to the lenses 2 and 3, and Is calculated on the X, Y, and Z axis coordinates and displayed on the display 27 or the like.

Next, the operation of the above configuration will be described. For example, when measuring the shape of the interior of an existing tunnel T or the like, which is the object to be measured, the reference at the center of the tunnel T in the width direction is used.
The measuring machine in a position placed in a fixed state. In addition, the length direction serving as the reference of the tunnel T is defined as the X axis, the width direction perpendicular to the X axis is defined as the Y axis, and the vertical height direction is defined as the Z axis. And arrange them horizontally. First, only the horizontal rotating means 8 is driven to measure the radius direction of the tunnel T, and the cross section in the radial direction is measured based on the horizontal angle position data and the distance data to the measured object (FIG. 4).
The measurement locus Sa) shown in FIG. Next, the plane rotation driving means 24
Is driven to rotate the measuring machine body 1 by a predetermined angle and fixed, and the horizontal rotation means 8 is driven to measure the inner space shape of the tunnel T, and the plane angle position data and the horizontal angle position data are measured. The inner space shape is measured based on the distance data to the object. FIG. 4 exemplifies a case where the measuring device main body 1 is rotated in a counterclockwise direction in the figure by 45 degrees at a plane of 45 degrees for the sake of description, and symbols a to h indicate the rotated positions of the measuring device main body 1 and symbols Sa. To Sh are the measuring machine body 1 at positions a to h.
Further, as shown by reference numerals Sa to Sb, the inner space shape is measured at a position where the measuring machine main body 1 is plane-rotated at a predetermined angle and fixed, thereby obtaining the inner space shape of the tunnel T. Is calculated, and the data is stereoscopically displayed on a display 27 provided with a monitor means as shown in FIG. 5, and an inner space shape Ta corresponding to the precast plate is obtained. It should be noted that the dashed lines above and below the measurement trajectories Sc and Sg in FIG. And the measurement trajectory S
In order to make the planes substantially equidistant from each other, the measuring apparatus main body 1 is not rotated by a predetermined angle , but is rotated by a predetermined angle.
, That is, the direction of the horizontal rotation shaft 7 is changed from the X-axis direction to Y direction.
The plane rotation angle is gradually reduced as approaching in the axial direction .

Then, the inner space shape can be three-dimensionally measured in a predetermined range without moving the measuring machine, and the predetermined range can be measured in a fixed state without moving the measuring machine.
That is, since the measurement can be performed only in a range that can be measured by the measuring device main body 1, the inner space shape of the tunnel T, which is the measurement object,
That is, the inner surface shape can be efficiently measured in a short time.

Further, instead of the measuring machine body 1 by Jo Tokoro angle of being dynamic planar times, the orientation of the measuring unit 1, ie As the orientation of the horizontal rotary shaft 7 approaches the X-axis direction in the Y-axis direction Since the measurement is performed with the plane rotation angle gradually reduced, the inner space shape of the tunnel T or the like that is long in the X-axis direction, that is, the length direction can be accurately measured.

FIG. 6 shows a second embodiment of the present invention. In FIG. 6, the same parts as those in the first embodiment are denoted by the same reference numerals, and FIG. Are stereoscopically displayed on the display device 27 having monitor means,
The protruding portion 31 indicates a bay window of a room to be measured, and the vertical concave portion 32 indicates a column portion. Thus, by using the measuring device of the present invention, it is possible to measure various interior shapes and display them three-dimensionally. It is possible to obtain the dimensional data of the necessary parts.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, in the embodiment, the measuring instrument body is described as an example of a type that emits light and receives light.However, such as a type that measures a distance using an ultrasonic wave or a laser beam, the measuring instrument body is of various types. Can be used. Also, at a position away from the measuring machine,
If a target such as a reflection sheet that reflects light, ultrasonic waves, laser beams, or the like is provided on the measurement object, the measurable range is expanded and the measurement accuracy is improved.

[0014]

According to the present invention, the horizontal plane in the longitudinal direction of the object to be measured is provided.
Plane rotation driving means for rotating the water, and water parallel to the horizontal plane.
Inner sky shape measuring device consisting of horizontal rotation drive means for flat rotation shaft
Therefore, the inner shape of the object to be measured is
Can be measured three-dimensionally without changing the position of the object, and it is possible to efficiently measure the shape of the interior space within a predetermined range in a short time, and the axis direction of the horizontal rotation axis is the length of the object to be measured. One
From the direction, approaching in the width direction orthogonal to this length direction
So that the plane rotation angle of the plane rotation axis becomes gradually smaller.
Since the plane rotation driving means is controlled in the above-described manner, a hollow shape which is long in the length direction can be accurately measured.

[Brief description of the drawings]

FIG. 1 is a longitudinal section of a measuring instrument showing a first embodiment of the present invention.

FIG. 2 is a plan sectional view of the measuring instrument showing the first embodiment of the present invention.

FIG. 3 is a block diagram showing a first embodiment of the present invention.

FIG. 4 is an explanatory plan view illustrating a measurement method according to the first embodiment of the present invention.

FIG. 5 is a perspective view of an inner shape of a tunnel displayed by a display device showing the first embodiment of the present invention.

FIG. 6 is a perspective view of an inner space shape of a room displayed by a display device showing a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Measuring instrument main body 2 Light transmission objective lens (transmission part) 3 Light reception objective lens (reception part) 7 Horizontal rotation axis 8 Horizontal rotation drive means 22 Installation part 23 Rotation part (plane rotation axis) 24 Plane rotation drive Means T Tunnel (object to be measured)

Claims (1)

(57) [Claims] An object is provided at a reference position at the center of a measured object in the width direction of the inner space.
The installation part to be placed, and provided in the installation part, the vertical plane as the axis and the horizontal plane
A plane rotation drive that rotates a plane rotation axis as a rotation plane by 360 °
Moving means and a plane rotating shaft of the plane rotating driving means,
On the other hand, the horizontal rotation axis with the horizontal direction as the axial direction is 360 °
A measuring device for measuring a distance to a measuring point by a horizontally rotating driving means that rotates and a transmitting unit and a receiving unit.
A stationary machine main body, wherein a horizontal rotating shaft of the horizontal rotating driving means is provided.
The direction of the transmitting unit and the receiving unit is orthogonal to the horizontal rotation axis.
A measuring unit that is fixed in the that direction, with the axial center direction of the horizontal pivot axis or the longitudinal direction of the workpiece
As you approach the width direction perpendicular to this length direction,
The plane rotation angle of the plane rotation axis is gradually reduced.
In addition, the rotation of the plane rotation driving means is controlled,
An inner space shape measuring machine characterized by measuring the inner space shape.