Underground pipeline measuring system based on inertial technology and its measuring and its calculating method

An underground pipeline and measurement system technology, which is applied to the underground pipeline measurement system based on inertial technology and its measurement and calculation field, can solve the problems of dangerous operation, lack of versatility, and shallow buried depth of pipelines, and achieves the effect of high precision and good autonomy.

Inactive Publication Date: 2007-10-10
SHANGHAI TRENCHLESS INFORMATION ENG +2
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Problems solved by technology

In principle, these conventional measurement methods have the following defects: First, the measurable buried depth of the pipeline is relatively shallow, usually no more than 5 meters, and some instruments with good performance do not exceed 10 meters
Second, the measurement accuracy is easily disturbed by electromagnetic fields and ferromagnetic objects, and the effect is poor when there are strong electromagnetic interference sources such as power pipelines and large-scale engineering equipment near the measurement site
Third, each method is only suitable for pipe measurement of a certain type of material, lacking versatility
Fourth, rely on manual work on the pipeline to be tested, for example, when the pipeline crosses the road, it will bring danger to the operation, or when the pipeline passes through the water surface and buildings, it cannot be measured

Method used

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  • Underground pipeline measuring system based on inertial technology and its measuring and its calculating method
  • Underground pipeline measuring system based on inertial technology and its measuring and its calculating method

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Embodiment Construction

[0020] According to the accompanying drawings 1 and 2, the pipeline measurement unit: it is pulled by a steel cable and moves in the pipeline, and is used to detect the three-dimensional information of the pipeline. This unit contains four sections:

[0021] (1) Gyroscope, used to provide the heading angle information of the current segment of the pipeline;

[0022] (2) The accelerometer provides information on the pitch angle of the current section of the pipeline;

[0023] (3) The odometer of the photoelectric encoder is used to measure the length of the pipeline;

[0024] (4) A high-performance microprocessor with a high-precision A / D interface is responsible for collecting the signals of each sensor and performing position calculation and data fusion. Through a long-distance communication module (RS485, etc.), the three-dimensional information (X, Y, Z) output to PC for further processing.

[0025] The shell is made of duralumin material, compact in size, has good impac...

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Abstract

An underground pipeline measurement system based on inertia technique comprises pipe measurement unit including gyroscope for providing pipe current section course angle information, accelerator for providing pitch angle information, speedometer of photoelectric coder for measuring pipe length and microprocessor for collecting signal from various transducers and for outputting pipe 3-D information to PC computer; and external power supply unit.

Description

technical field [0001] The invention relates to an underground pipeline measurement system, and in particular discloses an inertial technology-based underground pipeline measurement system and a calculation method thereof, which are applied to three-dimensional information measurement of underground pipelines of various materials and buried depths. Background technique [0002] With the continuous advancement of urban infrastructure construction, there is an increasingly wide demand for the measurement and positioning of underground pipelines. In engineering, electromagnetic pipeline locators and ground penetrating radar are usually used to measure underground pipelines. In principle, these conventional measurement methods have the following defects: First, the measurable buried depth of pipelines is relatively shallow, usually no more than 5 meters, and some instruments with good performance do not exceed 10 meters. Second, the measurement accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00G01C21/18G01C21/10
Inventor 宋华李大海张军香李旭辉王晓航
Owner SHANGHAI TRENCHLESS INFORMATION ENG
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