JP2002005662A - Direct advance degree measuring device for buried pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy and accurate degree of direct advance measurement for buried pipe. SOLUTION: The device, which measures the degree of direct advance of the buried pipe 14 in a horizontal direction with spaces 12, 13 that a hand reaches the both ends of the spaces 12, 13, comprise a receiving device 8 of a laser beam L with coordinates Xa, Ya, which are vertical to the forward running direction. The device inserts a carriage 15 with a running distance instrument 22 from an end of the pipe 14, to emit the beam L from the other end of the pipe 14 toward origin 0 of the beam-receiving panel coordinates Xa, Ya, and then inputs the coordinates Xa, Ya of the laser beam on the device 8 to a running distance Z of the carriage 15 to a computer-controlled measuring device 20 at an outside of the buried pipe 14 for measuring the degree of direct advance of the buried pipe 14 by measured values X, Y, Z.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the degree of straightness of a substantially horizontal buried pipe having spaces accessible at both ends.

[0002]

2. Description of the Related Art When inspecting the straightness of a substantially horizontal buried pipe after completing the work of burying the substantially horizontal buried space between two manholes, this inspection conventionally uses an electric light at one open end of the buried pipe. , And a visual inspection was performed in which the inside of the tube was viewed from the other open end. However, in this visual inspection, the straightness was determined only by experience and feeling, and the straightness could not be represented by a numerical value.

[0003]

[Problems to be Solved by the Invention] Improving construction accuracy by having a space that can be reached by humans at both ends and making it easy to measure the straightness of a substantially horizontal buried pipe that cannot be inserted by humans, and expressing the straightness by numerical values It is intended.

[0004]

A description will be given with reference to the drawings. The device for measuring the straightness of a buried pipe according to the present invention is a device for measuring the straightness of a substantially horizontal buried pipe 14 having spaces 12 and 13 accessible at both ends. A trolley 15 having a laser beam L receiving device 8 with vertical coordinates Xa and Ya and having a traveling distance measuring device 22 is inserted from one end of the buried tube 14, and the laser beam L is sent from the other end of the buried tube 14 to the light receiving device coordinates. Xa, Ya
And the laser beam coordinates Xa, Ya on the light receiving device 8 with respect to the traveling distance Z of the carriage 15 are input to the computer-controlled measuring device 20 outside the buried pipe, and the measured values X, Y, Z It measures the straightness of the vehicle.

[0005]

Embodiments of the present invention will be described with reference to the drawings. 1
1 is the ground, and 12 and 13 are spaces that can be reached by humans, such as manholes. Reference numeral 14 denotes a substantially horizontal buried pipe connecting the two holes 12, 13, and is, for example, a sewer pipe.

Reference numeral 15 denotes a bogie inserted from one end of the buried pipe 14, which moves forward and backward by rotation of an index cord reaching the through holes 12 and 13 or an electric motor mounted on the bogie.
In addition, a traveling distance measuring device 22 capable of measuring the moving distance Z of the carriage 15 based on the number of rotations of the wheels 16 and 17 is provided.

Reference numeral 8 denotes a laser beam receiving device, and a light receiving plate 8a
And the television camera 8b, and the light receiving plate 8a
5 is provided perpendicular to the traveling direction. The light receiving plate 8a is provided with coordinates Xa and Ya. The coordinates X and Y indicate which position the laser beam L hits.
Can be specified.

[0008] The cart 15 may be equipped with an inclinometer 18 for measuring an inclination angle as required.

Reference numeral 19 denotes a laser beam emitting device, and the buried pipe 1 is provided.
The laser beam L is inserted into the other end of the device 4 and is emitted toward the laser beam receiving device 8.

Reference numeral 20 denotes a computer-controlled measuring device arranged at an arbitrary position on the ground or the like, which emits a laser beam L, travels a trolley Z, and coordinates X and Y of the laser beam on the light receiving plate 8a.
Is displayed on the display 21 of the computer-controlled measuring device, and can be recorded on recording paper.

First, the carriage 15 is disposed at the center of one end of the buried pipe 14, and the beam of the laser beam L from the laser beam emitting device 19 installed at the center of the other end of the buried pipe 14 is reflected by the coordinates Xa and Ya of the light receiving plate 8a. The laser beam emitting device 19 and the control / measuring device 20 are adjusted to be at the origin 0.

Next, the carriage 15 is advanced, and the positions of the laser beams Xa and Ya with respect to the travel distance Z are displayed on the display 21 as Xb and Yb, and are printed on recording paper, so that the mutual numerical values of X, Y and Z can be obtained. The straightness of the buried pipe 14 can be measured.

Incidentally, instead of the X and Y coordinates, polar coordinates consisting of a base axis and a radius with respect to a reference point can be used.

The computer controlled measuring device 20 includes C
A PU 24, a board 25, and a control panel 26 are provided. The control panel 26 is provided with a power on / off button 27, a bogie forward button 30, a bogie retreat button 31, and a laser beam emission on / off button 32. It is connected to the servo device 23 of the cart.

[0015]

According to the present invention, it is possible to easily, quickly and accurately measure the straightness of a buried pipe whose both ends are open to a space accessible to humans.

[Brief description of the drawings]

FIG. 1 is an overall vertical cut side view including a buried pipe.

FIG. 2 is a side view of the cart.

FIG. 3 is a front view of a light receiving panel.

FIG. 4 is a front view of a control device including a display.

FIG. 5 is an overall circuit diagram.

[Explanation of symbols]

 Reference Signs List 8 laser beam receiving device 8a light receiving plate 8b television camera 11 ground 12 space accessible to humans 13 space accessible to humans 14 buried pipe 15 trolley 16 front wheel 17 rear wheel 18 inclinometer 19 laser beam emitting device 20 computer control and measuring device 21 Display 22 Travel distance measuring device 23 Servo device 24 CPU 25 Substrate 26 Control panel 27 Power on / off button 30 Bogie forward button 31 Bogie retreat button 32 Laser beam emission on / off button 33 Encoder L Laser beam X coordinate Y coordinate Z Travel distance of bogie

Claims (1)

[Claims] 1. An apparatus for measuring the straightness of a substantially horizontal buried pipe (14) having spaces (12, 13) accessible to both ends at both ends, wherein a coordinate (X
a carriage (15) having a laser beam (L) receiving device (8) with a, Ya) and a traveling distance measuring device (22);
Is inserted from one end of the buried tube (14), and the laser beam (L) is applied from the other end of the buried tube (14) to the light receiving device coordinates (X).
a, Ya) is fired toward the origin (0) of the bogie (1).
5) The coordinates (X, Y) of the laser beam on the light receiving device (8) with respect to the travel distance (Z) are input to the computer-controlled measuring device (20) outside the embedding tube, and embedded by the measured values (X, Y, Z). Buried pipe straightness measuring device for measuring straightness of pipes.