Novel composite earthquake demodulator

A technology of geophones and land geophones, applied in the field of marine geophysical surveying and surveying, can solve problems that affect the efficiency of seismic data detection, false bright spot signals, etc.

Inactive Publication Date: 2008-01-23
陕西超波传感器有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using conventional marine hydrophones to explore the seabed usually produces bright spots in seismic data. It is generally believed that the bright spots are likely to be natural gas. However, due to the above reasons, false bright spot signals are often given, which affects the efficiency of seismic data detection.

Method used

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  • Novel composite earthquake demodulator

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Embodiment Construction

[0019] Embodiments As shown in Figure 1, the general structure of the composite geophone is divided into three parts, namely the ocean hydrophone 1 on the right, the land geophone assembly 2 in the middle and the joint part 4 on the left. The ocean hydrophone 1 is fixed in the housing 7; the land geophone assembly 2 is fixed in the sleeve housing 3; the ocean hydrophone 1 and the land geophone assembly 2 in the middle are respectively connected through the cables drawn out by the connection line 6 and the joint 4 5. Electrically connect and output signal outward.

[0020] Fig. 2 is a schematic diagram of the internal structure of the embodiment. As shown in Fig. 2, in the housing 7 on the right, the bottom (right side) of the housing 7 is installed with a marine hydrophone 1 composed of multiple piezoelectric ceramics, the marine hydrophone 1 It is a resonant resonance cavity, that is, a sound pressure sensor. The plane part of the shell 7 is the signal receiving surface of th...

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Abstract

The invention is characterized by that it is formed from marine hydrophone, land wave detector component and connector portion which are successively connected. The marine hydrophone is fixed in the shell body of one end of self-body, said shell body is one made up by using acoustic transmission material. The piezoelectic ceramic wafer of the marine hydrophone is faced with sound wave receiving surface of circular surface of shell body, the frequency modulation adaptor of the marine hydrophone is fixed in the upper portion of the shell body, and the piezoelectric ceramic wafer in the marine hydrophone is electrically connected with frequency-modulation adoptop. The middle of self-body is sleeve shell body in which a supporting frame is set, and said supporting frame is supported by means of left and right two supporting rings, the land wave detector is set in the hole of said supporting frame, in the cavity of sleeve shell body there is a liquid damping oil, and another end of self-body is equipped with the connector portion.

Description

[0001] Technical field: the present invention relates to a geophone, in particular to a composite geophone. It belongs to the field of marine geophysical surveying and surveying. Background technique: [0002] At present, marine seismic exploration usually uses marine hydrophones for exploration. Since the shear stress of water is zero, there are no shear waves in seawater, only longitudinal waves. The longitudinal wave is converted at the interface between the seabed and water to form a converted wave, which converts the seismic signal transmitted from the seabed, and the specific information will be distorted. Conventional marine hydrophones are used to explore the seabed, and usually produce bright spots in seismic data. It is generally believed that the bright spots are likely to be natural gas. However, due to the above reasons, false bright spot signals are often given, which affects the efficiency of seismic data detection. Invention content: [0003] The purpose of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/18H04R1/44
Inventor 赵昕许平
Owner 陕西超波传感器有限责任公司
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