A method and device for autonomously collecting bottom vibration of underwater blasting

The technology of a collection device and collection method is applied in the field of autonomous collection method and system of underwater vibration in underwater blasting, which can solve problems such as low signal-to-noise ratio, difficult installation, and too long cables, and achieve strong operability and convenient installation and use. The effect of convenience and simple structure

Active Publication Date: 2017-06-27
PLA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing underwater vibration testing equipment, such as complex structure, difficult installation, and low signal-to-noise ratio caused by too long cables, the present invention provides a three-way sensor for autonomous acquisition of underwater vibration. The sensor adopts an integrated offline design , can stand by for a long time, collect independently, the internal structure is compact, the layout is reasonable, the outer shell is sealed and waterproof, corrosion-resistant, easy to carry, install and recycle, and can be reused many times

Method used

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  • A method and device for autonomously collecting bottom vibration of underwater blasting
  • A method and device for autonomously collecting bottom vibration of underwater blasting
  • A method and device for autonomously collecting bottom vibration of underwater blasting

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Embodiment 1

[0100] Step 1, the rest of the modules in the acquisition device except the positioning block, the guide rod and the top cover are assembled according to the assembly relationship;

[0101] Step 2, connect the network interface on the interface module with the network interface of the host computer through the data cable, and set the relevant acquisition parameters on the software interface of the host computer. The initial start time is 8:00:00, the trigger threshold is 0.05V (corresponding to the vibration speed of 0.175cm / s), the sampling frequency is 8000bps, and the silent time is 5s, and the maximum collection time is 10 times, so the duration of each collection signal is 43688b / 8000bps=5.461s. After the setting is completed, remove the data cable, assemble the positioning block, guide rod, top cover and cylindrical shell, and place it in a drill hole with a depth of 500mm and a diameter of Φ100mm on the underwater rock;

[0102] Step 3, the acquisition device collects t...

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Abstract

The present invention provides a method for autonomous collection of bottom vibration of underwater blasting, comprising the following steps: step 1, providing a collection device; step 2, setting the initial start time, trigger threshold, sampling frequency, quiet time, and collection times, and placing the collection device In the underwater borehole; step 3, the acquisition device starts to collect the underwater blasting vibration acceleration signal and converts it into a velocity signal, and records the velocity signal; step 4, the acquisition is completed, and the acquisition device is taken out of the borehole. The invention can automatically start, automatically detect, automatically trigger, and automatically collect at a specified time, and has strong operability.

Description

technical field [0001] The invention belongs to the field of blasting earthquake testing, and in particular relates to a method and system for autonomously collecting bottom vibration of underwater blasting. Background technique [0002] There are three main types of current underwater vibration testing equipment, one is a large-scale submarine seismograph OBS (patent 200910093585.5), this type of seismograph is used for deep-water submarine earthquake research, has complete functions and high precision, but is bulky and complex in structure. It is expensive and generally only used for large-scale marine scientific experiments; the second type is a large submarine streamer sensor (patent 200910019112.0), which integrates sensors, data lines, and power lines into the streamer, and the measurement signal is transmitted to the tugboat through the streamer Or the collection instrument on the water platform needs a special tugboat to cooperate with launching and recycling. The sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/18G01V1/24G01V1/38
Inventor 顾文彬王志华陈江海刘建青陆鸣武双章徐浩铭王振雄董勤星胡亚峰陈学平徐景林黄鹤郑向平
Owner PLA UNIV OF SCI & TECH
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