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Detection method for pipe diameter of underground non-metal pipe

A non-metallic tube and detection method technology, which is applied to electromagnetic wave detection, measuring devices, instruments, etc., can solve the problems of immature technology and large errors, and achieve the effects of high detection accuracy, small deviation range and saving detection costs.

Active Publication Date: 2012-06-06
GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sometimes the width of the radar wave is also used to estimate the diameter of the pipe, but the error of this method is often very large, and the technology is very immature

Method used

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  • Detection method for pipe diameter of underground non-metal pipe
  • Detection method for pipe diameter of underground non-metal pipe
  • Detection method for pipe diameter of underground non-metal pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 4 to Figure 7As shown, in the completion acceptance of the underground non-metallic water supply pipe numbered 07J3345 on Dapu South 1st Street, Guangzhou City, the two underground non-metallic water supply pipes are the first plastic pipe with a diameter of 0.1m and the first plastic pipe with a diameter of 0.15m The second plastic pipe of m, the two underground non-metallic water supply pipes are in the state of water supply; the angle between the electromagnetic wave emitted by the transmitting antenna of the geological radar and the vertical direction of the underground non-metallic water supply pipe is α, and 0°≤α≤45°, the detection steps are:

[0037] a. Use ground radar to detect multiple reflected waves of underground non-metallic pipelines. First of all, choose the location of the detection section correctly: the radar section should be perpendicular to the direction of the pipeline, the ground of the radar section should be kept flat, there sh...

Embodiment 2

[0042] Such as Figure 8 As shown, when detecting an underground non-metallic pipe in Xiwan Road, Guangzhou City, the underground non-metallic pipe is a glass steel pipe with a diameter of 0.6m, and the glass steel pipe is in the state of water supply; the electromagnetic wave emitted by the transmitting antenna of the geological radar and the The angle between the vertical directions of the glass steel pipes is α, and 0°≤α≤45°, and the detection steps are:

[0043] a. Use ground radar to detect multiple reflected waves of the underground FRP pipeline. First of all, choose the location of the detection section correctly: the radar section should be perpendicular to the direction of the pipeline, the ground of the radar section should be kept flat, there should be no interference from manhole covers, iron blocks, wires, etc. on the section, and the section should not be laid under the high-voltage line; Antenna, the selection range of antenna frequency is 100MHz~600MHz: choose...

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Abstract

The invention relates to a method for detecting the pipe diameter of an underground nonmetallic pipe, which fully utilizes the time spacing between times of reflected waves of radar transmitting electromagnetic waves. The method comprises: using geological radar to detect and acquire times of reflected waves of the underground nonmetallic pipe; reading the reflection time of the times of reflected waves of the geological radar on a radar host in turn; and solving the pipe diameter of the pipe according to the arithmetic expression and the characteristic of the time spacing between the reflected waves. The method has the advantages of high economic benefit, high detection precision and wide use range.

Description

technical field [0001] The invention relates to a method for detecting the diameter of an underground non-metallic pipe, in particular to realizing the detection of the diameter of an underground non-metallic pipe by using geological radar. Background technique [0002] In the as-built survey of underground pipelines, the diameter of the pipeline is a very important attribute. Because in urban roads, not only the number of pipelines is huge, but also the distribution and arrangement of pipelines are intricate. To accurately distinguish various pipelines without causing misjudgment, it is necessary to fully grasp the attributes of the measured pipeline anomalies as much as possible. Among them, pipe diameter is a very important attribute. For example, some pipelines originally had a diameter of 100mm, but after renovation, they become 200mm, and the old pipelines are only discarded and not dismantled. During detection, two pipelines will be found at the same time. Except fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B15/00G01V3/12
Inventor 葛如冰丘广新林鸿张荣
Owner GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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