Measurement and transmission apparatus for marine riser fatigue parameter and calculation method of optimal repeater spacing

A fatigue parameter and transmission device technology, applied in the direction of measurement device, transmission system, signal transmission system, etc., can solve the problems of complex structure, installation and interface of real-time monitoring system, high cost, shorten the signal transmission distance, broaden the lifetime, The effect of increasing the available bandwidth

Inactive Publication Date: 2012-04-25
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Compared with the stand-alone monitoring system, the structure, installation and interface of the real-time monitoring system are very complicated, and the cost is high, so it is not suitable for the monitoring of deep water risers

Method used

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  • Measurement and transmission apparatus for marine riser fatigue parameter and calculation method of optimal repeater spacing
  • Measurement and transmission apparatus for marine riser fatigue parameter and calculation method of optimal repeater spacing
  • Measurement and transmission apparatus for marine riser fatigue parameter and calculation method of optimal repeater spacing

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Embodiment Construction

[0024] Describe the present invention below in conjunction with specific embodiment:

[0025] Refer to attached figure 1 , in this embodiment, the riser fatigue parameter measurement transmission device includes an underwater acoustic signal receiving device 7 , several repeaters 6 and a riser fatigue monitoring device 5 .

[0026] Riser fatigue monitoring device 5 is in the position of the riser to be detected, refer to the attached figure 2 , The riser fatigue monitoring device includes a fatigue signal sensor, a source coder, a channel coder, a signal modulator, a power amplifier, a controller, an underwater acoustic emission transducer and a power supply. The fatigue signal sensor includes a triaxial acceleration sensor, a stress-strain sensor, and an inclination sensor. The triaxial acceleration sensor collects the vibration acceleration of the riser, the stress-strain sensor is responsible for detecting the bending strain of the riser, and the inclination sensor is res...

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Abstract

The invention provides a measurement and transmission apparatus for marine riser fatigue parameters and a calculation method of optimal repeater spacing. The apparatus comprises an underwater sound signal receiving device, a plurality of repeaters and a marine riser fatigue monitoring device. The marine riser fatigue monitoring device detects a fatigue signal and transmits the fatigue signal to the repeaters; and after multiple transmissions by the repeaters, the fatigue signal is transmitted to the underwater sound signal receiving device. According to calculation of energy consumption of different repeater spacing single hop links, total transmission energy consumption of employing different repeater spacings is figured out, thereby figuring out the optimal repeater spacing corresponding to a lowest total transmission energy consumption by comparison. The invention employs repeaters to shorten a signal transmission distance, reduce transmission power consumption of a single hop distance; besides, an optimal distance scope exists, so as to realize a lowest total transmission energy consumption.

Description

technical field [0001] The invention relates to the technical field of marine underwater acoustic communication, in particular to a riser fatigue parameter measurement transmission device and an optimal relay distance calculation method. Background technique [0002] As the link between the subsea wellhead and the offshore operating platform, the riser plays an important role in isolating seawater, guiding drilling tools, circulating drilling fluid, and compensating the heave movement of floating drilling units. No matter what kind of floating system scheme is adopted for deep-sea oil and gas exploitation, the riser is an indispensable equipment for offshore oil and gas exploitation, and it is also one of the weak and vulnerable components. The riser in the deep sea (greater than 1500m) environment will generate alternating stress under the joint action of various loads such as ocean currents, waves, and sea surface platform oscillation, drift, and undulating motion, which w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C23/02G01D21/02H04B13/02
Inventor 王海燕李保军申晓红赵瑞琴闫永胜白峻陈钊白卫岗张育芝
Owner NORTHWESTERN POLYTECHNICAL UNIV
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