JP4104572B2 - Full-hole pipe depth measurement system - Google Patents

Description

  The present invention relates to a full-pipe depth measurement system, and more particularly to a longitudinal depth measurement system for a long distance from a manhole to a manhole, for example, 150 m of the underground pipe.

  The depth position of the transmission pipelines buried in the ground is not necessarily consistent with the construction drawings at the time of construction due to changes or changes in the surface form. On the other hand, pipes and structures buried in the ground due to infrastructure development etc. tend to increase year by year and become congested. In the construction plans and constructions that embed pipes in the ground carried out by each business entity, the technical position of other companies' equipment by clearly indicating the burial position, especially the depth position, of the burial pipe (object) constructed by the company. Accidents such as effects and trauma can be prevented.

  A fully-filled pipe line has a cable inserted therein, and the gap between the pipe and the cable is small, and is no more than about 30 mm. Construction of longitudinal depth measurement over a long distance using this small gap is not known. In laying construction of a propulsion pipe used for sewers and the like, a propulsion pipe position measuring device whose pipe opening is less than 300 mm is known (for example, see Patent Document 1).

JP2003-247826A (FIG. 1 etc.)

  The depth measurement of the buried position in the underground transmission pipeline can be measured with a gyroscope when there is a hole tube with no incoming cable, but the full hole where the cable is inserted into all the pipelines. Since the pipe has a small gap (clearance) between the pipe and the cable and is only about 30 mm as described above, it is impossible to use a gyroscope, and thus such measurement is impossible.

An object of the present invention is to make it easy to reduce the depth of a pipeline at a deep distance from the end of the pipe by utilizing a small clearance (clearance) between the pipe and the cable for a full-hole pipeline in which a cable is inserted into the pipeline. It is to provide a full channel depth measurement system that can be measured quickly and accurately by operation .

The above-mentioned problem is that a water tube into which water is injected and a signal cable are loaded, and a push pipe that can be inserted into a gap in a full-hole pipe line, and a rotary storage device in which a water injection tank is attached to store and push out the push pipe A small water pressure sensor that is connected to the water tube and the cable and measures the water pressure in the water tube and supported by the tip of the push pipe, and the push of the tip that the push pipe is pushed and moved through the pipe A distance measuring device that measures the length, and a data processing device that reads each output value of the distance measuring device and the water pressure sensor and calculates the distance from the base point of the pipe line applied to the pipe tip and the depth thereof, insertion tip of the pushing pipe above is supported by about 20 mm thick flat-shaped fixture having an inner hollow portion, the water tube on its inner hollow portion, of the signal cable Tip and has a small pressure sensor is arranged, and to the amount of change signal input corresponds to camera shake or depth variation of the push pipe to the data processing device is very vigorous amplitude, a predetermined time width of the output immediately before This is achieved by providing the data processor with amplitude stabilization processing means for calculating and outputting using the average value and the allowable threshold value as parameters.

  According to the present invention, a small hydraulic pressure sensor and a personal computer connected thereto can be used without using a gyroscope, and the longitudinal depth of a full line over a long distance, for example, 150 m can be continuously measured for each unit distance. .

  A water tube filled with water and a signal cable are loaded, and a push pipe that can be inserted into a gap in a fully-filled pipeline and a water pipe and a cable connected to the water tube and the cable to measure the water pressure in the water tube. Reads each output value of a small water pressure sensor supported at the tip, a distance measuring device that measures the indentation length of the tip where the pushing pipe is pushed and moved through the pipe, and a distance measuring device and a water pressure sensor A data processing device for calculating the distance from the base point of the pipe line to the pipe tip and the depth thereof is provided, and a water injection tank is attached at that time, and a rotary storage device for storing and feeding out the pushing pipe is attached. It is preferable.

  Further, there is provided means for continuously displaying on the monitor of the data processing device in real time the moving distance and the depth of the pipe line at the position for each unit distance of the pushing pipe tip. The output value of the water pressure sensor is input to the data processing device as an electrical signal. However, since the push-pipe is pushed in manually, the amount of change is very intense and stable in response to camera shake or depth change. It takes a lot of time to do. Therefore, signal stabilization processing means is provided in the computer of the data processing apparatus.

  Further, correction means for calculating the error by comparing each true value with each calculation value by the data processing device for the depth per unit distance using a simulated pipeline, and setting a correction formula so as to approximate the true value Are provided in the data processing apparatus.

  A personal computer, a PIO board, and an AD board are used for the data processing device, and a roller encoder is used for the moving distance measuring device at the tip of the pushing pipe.

A preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a layout example of the entire system mainly showing the layout of system components, FIG. 2 is a diagram of connection of system components, FIG. 3 is a detailed diagram of the tip of a pushing pipe according to the present invention, and FIG. It is an illustration figure of the rotary storage tool of the pushing pipe by.

A water tank 15 is attached to the upper portion of the rotary storage device 14 shown in FIG. The water tube 12a into which the water has been injected and the signal cable 12b are loaded, and the push-in pipe 12 that can be inserted into the gap in the full-hole pipe 18 is fed out from the rotary housing 14 arranged on the ground.
As shown in FIG. 1, the full-hole pipe 18 is laid in the ground, for example, about 150 m over a long distance from a manhole 17A to a manhole 17B.

As shown in FIG. 3, the push-in pipe 12 is loaded with a water tube 12a and a cable 12b, and a small water pressure sensor 10 that measures the water pressure in the water tube 12a is fixedly supported at the tip thereof. The small water pressure sensor 10 is supported by a flat fixing jig having a thickness of 20 mm as shown in the drawing, and is designed to be able to be pushed into a slight gap of the full-hole pipe 18 for a long distance . For the small water pressure sensor, a commercially available small pore water pressure gauge, for example, Kyowa Dengyo model BPA-D-100KPS35538 is used.

On the other hand, a distance measuring instrument that measures the indentation length of the tip of the pushing pipe 12 that is pushed and moved by the worker through the full-hole pipe 18 is constituted by a roller encoder 13 and a reversible counter 13c, and data processing Connected to the device 16. The data processing device 16 includes an amplifier, a PIO board, an AD board, a personal computer PC, and the like.
As a result, the data processing device 16 reads the output values of the distance measuring devices 13 and 13c and the water pressure sensor 10, calculates the distance from the base point of the pipe line applied to the tip of the pushing pipe 12, and the depth thereof, for example, FIG. As shown in the monitor screen shown in the upper right part of FIG. 1, the moving distance and the depth of the pipe line at that position are continuously displayed in real time for each unit distance that the pushing pipe tip moves.

The electrical signal input from the water pressure sensor 10 to the data processor 16 is pushed by the push pipe 12 by hand, so that the amount of change in the water in the water tube is very large corresponding to camera shake or depth change. It takes a considerable amount of time to oscillate and stabilize. Therefore, a signal stabilization processing means is provided in the computer of the data processing apparatus, whereby a quick and accurate measurement value can be obtained. As shown in FIG. 5, a steep input waveform is a linear output waveform (measurement value). To be processed. The outline of the processing will be described as follows.

  Regarding the measured value of the water pressure, an error occurs between the measured value and the true value due to changes in atmospheric pressure, air temperature, and water temperature, and this is corrected. As shown in FIG. 6, the simulated pipeline 28 is laid, the true value and the actual measurement value for each unit distance are represented as shown in FIG. 7, the error is obtained for the depth for each unit distance, and the constant coefficient β and the proportional coefficient α are calculated. The data processing apparatus is provided with a correcting means for calculating the set expression Y = αx + β (Y is corrected data, x is measured data before correction). This minimizes the error.

  The simulated pipeline 28 is 35m long and 125mm in diameter, and is measured with a gyroscope for reference while still in the empty tube. After that, the cable is inserted and the gap is set to 28mm. Thus, a system according to the present invention was used. Examples of these measurement data are shown in FIG.

FIG. 2 is a layout example diagram of the entire system, mainly showing a layout of system configuration equipment. The connection example figure of a system component apparatus. The detailed illustration figure of the pushing pipe tip by this invention. The illustration figure of the rotation storage tool of the pushing pipe by this invention. FIG. 6 is a view showing an example of input / output values using signal stabilization processing means. The laying top view and partial longitudinal cross-sectional view of a simulated pipeline. The measurement data example figure in a part of simulated pipeline.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Water pressure sensor 12 Push-in pipe 12a Water tube 12b Signal cable 13 Roller encoder 13c Reversible counter 14 Push-in pipe accommodation tool 15 Water tank 16 Data processing device 18 Full-pipe 28 Simulated full-pipe

Claims (2)

A water tube into which water is injected and a signal cable are loaded, a push pipe that can be inserted into a gap in a fully-filled pipeline, a rotary storage device to which a water injection tank is attached to store and feed the push pipe, a water tube, A small water pressure sensor that is connected to the cable and measures the water pressure in the water tube and supported by the tip of the push pipe, and the distance at which the push pipe is pushed and moved through the pipe. A measuring device, and a data processing device that reads each output value of the distance measuring device and the water pressure sensor and calculates the distance from the base point of the pipe line applied to the tip of the pipe and the depth thereof. insertion tip is supported by about 20 mm thick flat-shaped fixture having an inner hollow portion, the water tube on its inner hollow portion, the distal end portion and small signal cable And the pressure sensor are arranged, also correspondingly to shake or depth variation of the push pipe to extremely violent amplitude variation of the signal input to the data processing apparatus, the average value in a predetermined time width of the output immediately before A full-pipe depth measuring system, characterized in that an amplitude stabilization processing means for calculating and outputting an allowable threshold value as a parameter is provided in the data processing device. Correction for calculating the equation Y = αx + β (Y is the data after correction, x is the data before correction) in which an error is obtained for the depth for each unit distance using the simulated pipeline and the constant coefficient β and the proportional coefficient α are set. The full-pipe depth measuring system according to claim 1, wherein the means is provided in the data processing device.

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