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Research on the Sewer Pipes Inspection System Based on Ultrasonic Method

Author: FuRuLong
Tutor: YangLiJian
School: Shenyang University of Technology
Course: Measuring Technology and Instruments
Keywords: Sewer Pipes Ultrasonic Testing Rotating Planar Reflector Not Unde- tected Conditions Internal Testing Imaging
CLC: TU992.4
Type: Master's thesis
Year: 2009
Downloads: 154
Quote: 1
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Abstract


Urban sewer pipes charged with the exclusion of city’s domestic sewage, industrial waste water anzd rain water are close to the urban economic development and people’s life quality and work environment. At present, a suitable sewer pipes inspection system needs to be studied for timely inspecting the sewer pipes, which are widespread with leakage, corrosion, mud accumulation blockage or even collapse etc.faults, so that effective means can be adopted to maintain the sewer pipes to improve the ability of water exclusion, to extend the service life and to avoid huge economic losses.Sewer pipes inspection system based on ultrasonic method uses ultrasonic testing method to research on the issues of the inspection for sewer pipes, which exist with mud accumulation fault. This paper studies the traditional inspection methods and the current advanced inspection technologies at home and abroad for sewer pipes inspection. The related theories of reflection, refraction, transmission, attenuation and ultrasonic field model are studied in the propagation of ultrasonic wave, and it can obtain the materials selection basis of the rotating planar reflector and inspection device cavity wall, as well as the compensation basis of the ultrasonic attenuation. Single probe with rotating planar reflector ultrasonic testing method is used to research on the ultrasonic wave reflection to achieve pipe 360°ultrasonic scanning inspection, and not undetected conditions and various factors that affect the inspection results are analyzed and the relationship between constraints of the various parameters is obtained during the inspection process. The design of the rotating planar reflector device is studied and the inspection device structure, which is composed by the stepper motor, rotating planar reflector device, and ultrasonic probe, is designed. The low power, high speed amplifiers are used to design the inspection system hardware circuits. Microsoft Visual C++ software and OpenGL 3D graphics standard are used to design the ultrasonic testing data imaging program.Experimental results show that using the steel as the planar reflector material, and inspection device structure consisting of stepper motor, rotating planar reflector device and ultrasonic probe achieves 360°pipe rotating inspection; inspection system hardware circuits using high cutoff frequency amplifiers, inspection signals are speed and stability; images drawn by the sewer pipes inspection system imaging program can judge mud accumulation fault’s location and range of the sewer pipes.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Drainage works ( ditches works,sewer works) > The operational management of the drainage system
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