Sensor for measuring three-dimensional component of marine seismic wave

Abstract

The invention discloses a sensor for measuring the three-dimensional component of the longitudinal wave of a marine seismic wave, which mainly comprises a signal output cable, a vulcanized rubber sealing head, a closed spherical shell, a supporting body, vibration-measurement sensors, a spherical shell sealing ring, a protective sleeve, a fastening screw, a light spring and a rigid support. The closed spherical shell is hung on the rigid support with heavy weight through the light spring, the inside of the closed spherical shell is connected with the supporting body and the protective sleeve through a screw thread, the six vibration-measurement sensors are installed on the supporting body in the three-dimensional orthogonal direction, and the supporting body is connected with the closed spherical shell through the fastening screw and the protective sleeve in a fastening manner. The invention has the advantages that the direct sensation to a water particle vibration signal in the longitudinal wave field of the seismic wave propagating in the ocean is realized; the output impedance is lower, the difficulty of debugging of a signal conditioning circuit is reduced and the sensor has better frequency response at the low frequency section; and the acquisition to the vector information in a longitudinal wave signal of the submarine seismic wave propagating in the ocean is realized.

Description

technical field [0001] The invention relates to a seismic wave detection sensor, in particular to a three-component ocean seismic wave detection sensor, which belongs to the testing field. Background technique [0002] There are currently two methods used to detect earthquakes in the ocean: the first is to adapt the seismometers used on land to the seabed environment; the other is to use piezoelectric ceramic sensors for detection. [0003] For the first method, because submarine earthquakes are often accompanied by strong submarine activities, such as large-scale ground subsidence, cracking, etc., if the seismograph used on land is applied to the submarine environment, the deployment and recovery process will be complicated. , and the working environment has extremely high requirements on the safety and stability of the sensor itself and its transmission equipment. [0004] For the second method, the piezoelectric effect is used to convert the mechanical energy of the seis...

AI Technical Summary

Problems solved by technology

In the low frequency band, the output impedance of the piezoelectric ceramic sensor is as high as hundreds of megaohms, which brings problems such as signal energy loss, noise and zero drift, and increases the difficulty of system design.

Images