JPH02228211A - Instrument for measuring level of buried pipeline - Google Patents

Abstract

PURPOSE:To automatically and continuously recognize the buried state of a pipeline with accuracy by running a traveling vehicle through the pipeline and the calculating level difference between both ends of the pipeline on the bases of the inclined angle and running distance of the vehicle. CONSTITUTION:This instrument for measuring levels of buried pipelines is provided in a manhole, etc., inside of which one end of s pipeline 1 buried in the ground is opened, and a running vehicle 3 which is hauled by a rope 2 and incorporates an inclination detecting section 4 is installed to the instrument. In addition, a distance measuring section 6 which measures the running distance of the vehicle 3 and an arithmetic section 8 which successively calculates the level of the pipeline 1 from the running distance and inclined angle of the vehicle 3 when the vehicle 3 is run are provided. Therefore, the run distance and including of the vehicle 3 can be identified and the buried depth, etc., of the pipeline 1 can be found. When such operations are repeated, the buried state of the pipeline 1 can be recognized accurately and, at the same time, the data analysis can be performed automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a buried pipe level measuring device that accurately measures the height difference of a pipe buried underground.

(Prior Art) A conduit for accommodating an electric cable line is generally buried along a roadway. In addition, conduits for water, gas, and communication cables are often buried along roadways.

However, when these pipelines are installed side by side, it is necessary to conduct a detailed and accurate investigation of the buried condition of the existing pipelines. If the construction drawings have not been saved or the surface road conditions have changed, it may be necessary to actually excavate a part of the road to expose the pipe and measure its buried depth. ing.

(Problem to be Solved by the Invention) As described above, although the buried location of the pipeline can be relatively easily recognized by signs etc. installed on the ground, the buried depth cannot be accurately measured without trial excavation. It is difficult to
This made the work of adding pipelines and installing them in parallel complicated. Also,
Devices have been developed that measure the level of pipes using level meters, etc., but in reality, it requires a lot of work to analyze the measured data and post-process to understand the buried status of the pipes. there was.

The present invention has been made with attention to the above points, and an object of the present invention is to provide a buried pipe bell measuring device that can accurately grasp the buried state of the pipe and automatically analyze the data. The purpose is to

(Means for Solving the Problems) The buried pipe level measuring device of the present invention includes a traveling vehicle that travels in a pipeline buried underground, and a vehicle that is housed in the traveling vehicle and measures the inclination angle of the traveling vehicle. The vehicle is equipped with an inclination detection section for detecting the inclination, a measuring section for measuring the traveling distance of the traveling vehicle, and a calculation section for sequentially calculating the level of the conduit from the traveling distance of the traveling vehicle and the inclination angle during the traveling. It is characterized by this.

(Function) In the above-described device, a vehicle actually travels through the pipe, successively measures the inclination angle of the pipe, and outputs the measured values to the calculation unit.

On the other hand, if the distance traveled by the vehicle is measured by the measuring section, the calculation section can recognize how much distance the vehicle has traveled on what slope. Then, the horizontal movement distance and the vertical movement distance are calculated from the values to determine the buried depth of the pipe, etc. By repeating the above operations and plotting the results, it is possible to analyze the actual buried state of the pipeline.

(Example) Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the buried pipe level measuring device of the present invention.

The device shown in the figure is installed in a manhole or the like where one end of a conduit 1 buried underground opens. This device is provided with a traveling vehicle 3 that is pulled by a lobe 2. A tilt detection section 4, which will be described later, is housed inside the traveling vehicle 3. This inclination detection section 4 is for detecting the inclination angle θ of the traveling vehicle 3 with respect to a horizontal plane. Further, the wire 5 bound to the traveling vehicle 3 is wound around a drum 7 installed in a manhole, and is configured to be unwound as the traveling vehicle 3 travels. This wire 5 is connected to the measuring section 6
It is sandwiched between a pair of guide rollers 6a and fed out. The guide roller 6 a rotates as the wire 5 is fed out, and transmits the number of rotations to the measuring section 6 . The measuring unit 6 determines the amount of wire 5 to be fed out based on its rotational speed, and measures the traveling distance β of the traveling vehicle 3.

The wire 5 wound around the drum 7 is an integrated signal line that transmits the output signal of the inclination detection section 4 in the vehicle 3, and the wire 5 is connected to the drum 7 through a slip ring (not shown). is transmitted to the calculation unit 8. The output signal of the measuring section 6 is also input to the calculating section 8 . The calculation unit 8 is composed of a microprocessor, a recorder, etc., receives the output signal of the measuring unit 6 and the output signal of the slope detection unit 4, performs a predetermined calculation described later, and determines the level of the pipe 1. Qsin
It is configured to sequentially calculate θ, etc.

FIG. 2 shows a specific external view of the traveling vehicle.

A lobe 2 is tied to the front of this traveling vehicle 3, and a wire 5 is tied to the rear. Further, a trolley 3b is attached to the lower side of the main body 3a housing the inclination detection section 4, and wheels 3c are provided here. The running vehicle 3 is this wheel 3
c, it smoothly travels straight through the inside of the conduit 1 shown in FIG.

FIG. 3 shows a side view of the main parts of the inclination detection section 4.

The inclination detection unit 4 accommodated in the traveling vehicle 3 is generally connected to a support column 4.
It has a configuration in which a pendulum 4b is suspended from a. When the support 4a is tilted by an angle θ with respect to the horizontal plane 1o as shown in the figure, the pendulum 4
The angle between b and the axis of the support 4a is θ. This is detected optically or magnetically, for example, and the detection signal is outputted to the arithmetic unit 8 through the wire 5 shown in FIG.

Various methods are conventionally known for angle detection, including optically using a rotary encoder and magnetically using a Hall element, an induction coil, etc., and further detailed explanations will be omitted.

The buried pipe level measuring device described above is used as follows.

FIG. 4 shows an explanatory diagram of the operation of the apparatus of the present invention.

In the example shown in Figure 4, the manhole is located at point A, and its altitude is H meters. Then, the pipe line goes from point A to point B, 0
It is assumed that the cables are laid in a straight line toward point D. Incidentally, the inclination of the conduit is at an angle θ1. It changes as θ2°θ3.

Here, when the vehicle runs from point A to point B and then to point D via point 0, the inclination detection section 4 first outputs that the inclination is 01 up to point B. Next, at point B, the output of the inclination detection section changes and outputs the inclination θ2 up to the 0 point.Then, from the 0 point, the inclination angle changes again and outputs the inclination θ3.

On the other hand, the measuring section 6 delivers 41 lobes from point A to point B, further delivers lobes of β2 from point B to point 0, and further delivers lobes of I23 from point 0 to point D. Therefore, a total of 01+02+03 lobes will be delivered.

When the above output is sent to the arithmetic unit 8, the arithmetic unit performs the arithmetic operation as shown in FIG.

That is, as shown in the table of FIG. 5, between points A and B, the length of the wire drawn out is I21, that is, the running distance is β1, and the inclination angle thereto is θ1. Therefore, the horizontal interval distance between points A and B can be determined by Ql cos θ1. Further, the altitude difference between points A and B can be determined by Qlsinθl. Using the same idea, the distance traveled by the vehicle between points B and C is β2, and the angle of inclination between points B and C is θ.
2, the horizontal interval distance between points B and C is (22
cos θ2. Also, the altitude difference between points B and C is Q2a
inθ2. Also between points CD and C, the traveling distance of the vehicle is β3, the inclination angle is θ3, the horizontal section distance between points C and D is Q3 cos θ3, and the altitude difference is (23 sin θ3).

Therefore, in order to find the altitude of each point B, C, D,
What is necessary is just to add each elevation difference to the elevation H of a point.

By doing the above, it is possible to continuously determine the depth of the underground conduit, relative to the position of a specific manhole.

When a vehicle travels through the section shown in Fig. 4, the calculation unit 8 sequentially calculates the received data, and immediately draws a cross-sectional view of the pipe as shown in Fig. 4 based on the results. Is possible.

In addition, in the above case, the explanation was given for a pipe line laid straight from point A to point D when viewed from above.

However, the buried pipe level measuring device of the present invention cannot be used at point B or 0.
There is no problem even if the conduit is bent in the horizontal plane at a point. In this case, point B.

Based on a plan view or the like in which the 0 point is clearly marked in advance, the calculation unit 8 can draw a three-dimensional installation state of the pipe.

The present invention is not limited to the above embodiments.

In the above embodiment, one inclination detection section 4 for detecting the inclination angle with respect to the traveling direction of the traveling vehicle 3 is provided inside the traveling vehicle 3. By separately providing a detection unit for detecting the inclination of the wire 5, it is possible to correct the inclination angle when the vehicle 3 itself is inclined in the direction of twisting the wire 5 in the conduit 1.

As a result, the inclination angle 6 of the traveling vehicle 3 can be detected more accurately, and the buried state of the pipe can be accurately grasped.

(Effects of the Invention) The buried pipe level measuring device of the present invention described above calculates the difference in height of the pipe based on the inclination angle and distance traveled by a traveling vehicle in the pipe. Simply by installing it in a specific manhole or the like and driving a vehicle through the pipe, it is possible to continuously and automatically accurately recognize the buried state of the pipe.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the buried pipe level measuring device of the present invention, Fig. 2 is a side view of the traveling vehicle, Fig. 3 is a side view of the main part of the inclination detection section, and Fig. 4 is the main part. FIG. 5 is an explanatory diagram of the operation of the apparatus of the invention. FIG. 5 is an explanatory diagram of the operation of the calculation section of the apparatus of the invention. 1-----------1 pipe line, 3---1---------traveling vehicle, 4-------1-'--tilt detection section, 5------1 ”
---1-Wire, 6--------Measurement section, 6a --=--1--Guide roller, 7-----
---Drum, 8-------1 calculation section.

Claims (1)

[Claims] A traveling vehicle that travels in a conduit buried underground, an inclination detection section that is housed in the traveling vehicle and detects the inclination angle of the traveling vehicle, and a measuring section that measures the traveling distance of the traveling vehicle. A buried pipe level measuring device comprising: a calculation unit that sequentially calculates the level of the pipe from the traveling distance of the traveling vehicle and the inclination angle while the vehicle is traveling.