MULTICHANNEL STREAMER CABLE

• US 20190331818A1
• Filed: 11/28/2018
• Published: 10/31/2019
• Est. Priority Date: 04/25/2018
• Status: Abandoned Application

• Current Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan), Sonic Corporation (Mavericks, Inc. (d/b/a Inspire Brands, Inc.))
• Original Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan), Sonic Corporation (Mavericks, Inc. (d/b/a Inspire Brands, Inc.))
• Inventors: HARAGUCHI, Koshi, ARAI, Kohsaku, INOUE, Takahiko
• Application Number:
  US16/202,466
• Publication Number:
  US 20190331818A1
• Time in Patent Office: Days
• CPC Class Codes: G01V 1/162 Details
• CPC Class Codes: G01V 1/186 Hydrophones
• CPC Class Codes: G01V 1/22 Transmitting seismic signals to recording or processing apparatus
• CPC Class Codes: G01V 1/247 Digital recording of seismic data, e.g. in acquisition units or nodes
• CPC Class Codes: G01V 1/3843 Deployment of seismic devices, e.g. of streamers equipment for marine deployment in general B63B
• CPC Class Codes: G01V 2210/1423 Sea

Abstract

A multichannel streamer cable includes a plurality of vibration receiving units connected in series. The vibration receiving units each include a geophone that receives vibration of a sound wave under water, an amplifier that amplifies a signal output from the geophone, an AD converter that digitizes the signal amplified by the amplifier, and a processing section that performs processing for causing an internal memory to store, as measurement data, a digital signal obtained by digitizing the amplified signal by the AD converter.

Claims

1. A multichannel streamer cable comprising:

a plurality of vibration receiving units connected in series, each of the vibration receiving units including;

a geophone that receives vibration of a sound wave under water;

an amplifier that amplifies a signal output from the geophone;

an analog-to-digital (AD) converter that digitizes the signal amplified by the amplifier; and

a processing section that performs processing for causing an internal memory of the processing section to store a digital signal obtained by digitizing the amplified signal by the AD converter, as measurement data.

2. The multichannel streamer cable according to claim 1, further comprising:

a control unit that performs data communication with the vibration receiving units, wherein

the processing section performs processing for transmitting the measurement data stored in the internal memory to the control unit, and

the control unit includes a storage device that stores the measurement data received from the vibration receiving units.

3. The multichannel streamer cable according to claim 2, wherein the processing section changes an amplification factor of the amplifier based on a command received from the control unit.

4. The multichannel streamer cable according to claim 2, wherein the processing section performs measurement according to measurement time included in a command received from the control unit.

5. The multichannel streamer cable according to claim 2, wherein the control unit includes an atomic clock, the time of which is corrected based on time information received from a positioning satellite.

6. The multichannel streamer cable according to claim 2, wherein the control unit filters the measurement data stored in the storage device and transmits the filtered measurement data to an external processing device.

7. The multichannel streamer cable according to claim 2, further comprising:

a power supply unit that supplies electric power to the control unit and the vibration receiving units.

8. The multichannel streamer cable according to claim 1, further comprising:

an underwater resistor coupled to a vibration receiving unit that is the rearmost one of the vibration receiving units.