A method for distributing geophones around a seismic data source includes distributing a first geophones each including a first piezoelectric system in a first region in which the seismic data source is located then distributing second geophones each including a solar cell in a second region surrounding the first region. The second geophones further include a housing, a spike provided on a bottom surface of the housing, a sensor configured to sense seismic data; a processor configured to process the seismic data, a transceiver configured to transmit the processed seismic data and receive radio frequency (RF) signals wirelessly; and a power device. The power device is coupled to the sensor, the processor and the transceiver. The power device is configured to harvest energy from an environment where the geophone is located. The power device includes a solar cell provided on a top surface of the housing, a piezoelectric system provided on an edge of the housing adjacent to the top surface, and a thermoelectric generator provided on a bottom surface of the housing and a surface of the spike.

The present invention provides a multi-mode dispersion energy imaging device and method for a four-component marine interface wave of an ocean bottom seismometer, belonging to the technical field of marine seismic exploration. The method includes the following steps: designing an marine interface wave artificial seismic observation system, designing a reasonable observation system according to the geological condition of the operation area to ensure the resolution of the imaging to perform the marine artificial source seismic operation carrying out the data preprocessing of the seafloor surface wave, and then carrying out the three-component seismometer Scholte wave and the acoustic guided wave dispersion energy imaging, and the one-component hydrophone acoustic guided wave dispersion energy imaging; superposing and normalizing the three-component Scholte wave dispersion energy spectrum and the one-component acoustic guided wave dispersion energy spectrum. The device is implemented based on the method above.

Provided is a technique that can more reliably suppress erroneous determination of noise as an earthquake, in a seismic sensor. The seismic sensor operates in a power saving mode and a measurement mode with higher power consumption than that of the power saving mode. The seismic sensor includes: a measurement unit configured to measure acceleration; an earthquake determination unit configured to determine whether or not an earthquake has occurred based on the acceleration measured in a predetermined determination period after shifting to the measurement mode when shifting from the power saving mode to the measurement mode in a case where acceleration measured by the measurement unit exceeds a predetermined threshold; and an index calculator configured to calculate an index value indicating a scale of an earthquake in an earthquake processing period after the predetermined determination period, when the earthquake determination unit determines that an earthquake has occurred. The earthquake determination unit determines an occurrence of an earthquake based on the presence or absence of a pulse waveform in a waveform of acceleration measured in the determination period, and/or a frequency characteristic or a convergence characteristic after the pulse waveform in a waveform of the acceleration.

Erroneous determination of noise as an earthquake is reduced in a seismic sensor. The seismic sensor operates in a power saving mode and a measurement mode in which power consumption is larger than that in the power saving mode. The seismic sensor includes: a measurement unit configured to measure acceleration; an earthquake determinator configured to transition from the power saving mode to the measurement mode when the acceleration measured by the measurement unit exceeds a predetermined threshold, to determine whether an earthquake is generated based on the acceleration measured in the measurement mode; and an index calculator configured to calculate an index value indicating a scale of the earthquake when the earthquake determinator determines that the earthquake is generated. The earthquake determinator determines whether the earthquake is generated by determining whether a predetermined condition is satisfied, the predetermined condition being determined based on the acceleration measured in at least one determination period, each determination period into which a period after the power saving mode transitions to the measurement mode is divided being set to a processing unit, and the measurement mode transitions to the power saving mode when the earthquake determinator determines that the earthquake is not generated.

A docking station for receiving different types of seismic nodes, the docking station including a frame; a control module attached to the frame plural docking modules attached to the frame, wherein each docking module includes plural docking bays; a monitor attached to the frame and configured to display information about the plural docking modules; and a network connection device attached to the frame and configured to provide data transfer capabilities for each docking bay of the plural docking bays. The plural docking bays are configured to accept interchangeable ports that are compatible with the different types of seismic nodes.

Example seismic sensors and methods relating thereto are disclosed. In an embodiment, the seismic sensor includes an outer housing and a proof mass disposed in the inner cavity of the outer housing. In addition, the seismic sensor includes a first biasing member positioned in the inner cavity between the proof mass and an outer housing upper end that is configured to flex in response to axial movement of the outer housing relative to the proof mass. Further, the seismic sensor includes a second biasing member positioned in the inner cavity between the first biasing member and the outer housing upper end. Still further, the seismic sensor includes a sensor element positioned in the inner cavity between the proof mass and an outer housing lower end that is configured to generate a potential in response to movement of the outer housing relative to the proof mass.

Embodiments included herein are directed towards a seismic spread system that may use a MEMS oscillator as a timing reference. The system may include a plurality of nodal seismic sensor units. The system may also include a plurality of MEMS oscillator clock devices, wherein each of the plurality of MEMS oscillator clock devices is associated with a respective one of the plurality of nodal seismic sensor units, the plurality of MEMS oscillator clock devices being configured to input time synchronization to the seismic system. Each MEMS oscillator clock device may include a MEMS resonator in communication with an integrated circuit.

The present invention discloses a microseismic intelligent acquisition and data wireless transmission system of rock. The microseismic intelligent acquisition and data wireless transmission system of rock comprises a data acquisition and intelligent process module, used for acquiring an original microseismic signal and intelligently processing the original microseismic signal to obtain a timed second microseismic signal data packet; a wireless transmission module, connected with the data acquisition and intelligent process module. The data acquisition and intelligent process module transmits the timed second microseismic signal data packet to a satellite in a wireless manner through the wireless transmission module such that the satellite receives and stores the timed second microseismic signal data packet. The microseismic intelligent acquisition and data wireless transmission system of rock of the present invention is free from the wire transmission, largely reduces the workload of manual field monitoring, and improves the quality of monitoring data.

The present invention provides a multi-mode dispersion energy imaging device and method for a four-component marine interface wave of an ocean bottom seismometer, belonging to the technical field of marine seismic exploration. The method includes the following steps: designing an marine interface wave artificial seismic observation system, designing a reasonable observation system according to the geological condition of the operation area to ensure the resolution of the imaging to perform the marine artificial source seismic operation; carrying out the data preprocessing of the seafloor surface wave, and then carrying out the three-component seismometer Scholte wave and the acoustic guided wave dispersion energy imaging, and the one-component hydrophone acoustic guided wave dispersion energy imaging; superposing and normalizing the three-component Scholte wave dispersion energy spectrum and the one-component acoustic guided wave dispersion energy spectrum. The device is implemented based on the method above.

Techniques are disclosed relating to calibrating sensors configured to measure both pressure and acceleration. In various embodiments, a system detects a first voltage produce by a first piezoelectric material in a hydrophone when the hydrophone is exposed to an acceleration and detects a second voltage produced by a second piezoelectric material in the hydrophone when the hydrophone is exposed to the acceleration. The system, in some embodiments, compares the first voltage and the second voltage. Based on the comparing of the first and second voltages, in some embodiments, the system determines a resistance for a variable resistor coupled to one of the first and second piezoelectric materials.