Abstract:
PROBLEM TO BE SOLVED: To capture seismic data remotely and at the same time execute remote monitoring by dividing a communication channel into M frequency bands and at the same time dividing each frequency band into N+1 time slots. SOLUTION: A communication channel 300 of an earthquake-capturing system is divided into M frequency slots and N time intervals. More specifically, the communication channel 300 is divided by combining time sharing and frequency sharing. While the earthquake-capturing system is operating, a first sensor transmits data according to a slot number 1 using the communication channel 300, and a second sensor transmits data according to a slot number 2. This sort of transmission is repeated successively and a sensor N transmits data by a time slot M. An opposite link slot is preferably used for transmitting timing and control information to all sensors. When a data rate becomes faster or slower, a plurality of time slots are captured as needed to support throughput requirements.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method for operating a streamer cable in a horizontal direction. SOLUTION: There are provided the apparatus and the method for operating the streamer cable that is pulled in water at the rear of an earthquake surveying ship in a longitudinal direction. The apparatus comprises a cable controlling assembly that is fitted rotatably to a streamer cable. The assembly has a body with one or more wings mounted thereon. The wings are arranged so as to revolve around a revolution shaft. Ballast is attached to the assembly so that the revolution shaft is mainly in a vertical plane. The prior cable leveling bird is converted to one version of cable operating apparatuses by ballasting so that the revolution shaft of the wings of the bird is mainly maintained vertically. The cable operating apparatus provides force of a longitudinal component for operating the streamer, by adjusting the angle of the wings with an azimuth sensor for detecting the azimuth of the wings. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To remotely monitor and make controllable the seismic data acquisition by connecting a central command center supplying user interface to a local device connected to a remote device for seismic data acquisition and transmission. SOLUTION: In the monitoring system 430, a telephone system 702 is connected to PSTN 425 at an arbitrary number of commercial interfaces, a video meeting system 706 is connected to an interface 704 provided with an NT-1 adapter and the interface 704 is connected to an ISDN 420. Then, the ISDN router 708 connected with the ISDN 420 converts input data into IO base-T to send to a data analyzer 710. By constituting the monitoring system 430 in this manner and containing a plurality of local devices and remote location in a network, since the acquisition of seismic data at a plurality of remote locations can be administered in a plurality of command administration centers, the man power and time necessary for the administration can be reduced.
Abstract:
PROBLEM TO BE SOLVED: To remotely control, acquire, and monitor earthquake data by providing a remote earthquake-capturing system, a remote communication interface, a local communication interface, and a command center. SOLUTION: A system 100 is provided with an earthquake data-capturing system 105, an ISDN (total service digital network) router 110, an ISDN converter 115, microwave radio transceivers 120 and 125, an ISDN converter 130, an ISDN network 135, a client support center 145, and a group head office 140. Then, by connecting the router 110, the converter 115, the radio transceivers 120 and 125, the converter 130, the network 135, the group head office 140, and the client support center 145, the capturing of earthquake data is remotely controlled and accessed in real time.
Abstract:
A diagnostic tool includes a sensor for capturing at least one biosignal produced by a patient's heart and a computer device that implements a neural network iteratively trained via machine learning to generate a prediction about a heart condition of the patient. After the neural network is trained, the computer device can convert the at least one biosignal to a multi-dimensional input matrix for the deep neural network generated from a number (N) of biosignals captured by the sensor. The computer device then processes the multi-dimensional input matrix through the deep neural network, which subsequently outputs the prediction about the heart condition of the patient.
Abstract:
A marine acoustic source system has relativley densely packed energy sources arrayed in a tandem-like fashion along a horizontal plane. Preferably, a longitudinal axis of each source lies orthogonal to a pre-determined towing direction. The system includes protective tubes that encloses supply lines and auxiliary equipment, and a harness. The harness provides the primary mechanical connection for towing the sources through the water. To minimize bending of the supply lines, connectors having angular portions connect the sources to the supply lines. Further, the sources can be arranged such that source connection interfaces for receiving power, hydraulic fluid, or data point alternately in opposing directions. During use, the sources, e.g., air guns, are supported at a predetermined depth beneath the water's surface by a floatation buoy. Upon activation, the sources of a cluster each release individual air bubbles into the water. Because the air guns are relatively densely packed, the individual air bubbles coalesce into a single bubble that produces the desired acoustical signal.
Abstract:
The present invention provides a digital optical switch apparatus and process for manufacturing the apparatus. The apparatus includes a mirror assembly coupled to a top cap and to a bottom cap. The top and bottom caps each include one or more electrodes that, when energized with electrical energy, move a mirrored surface to one of a plurality of discrete positions. Mirror assemblies can be cascaded to create a packaged assembly having any multiple of discrete positions. The process includes planar micro-machining techniques to create isolated islands for electrical feed through. The process enables mechanical bonding of multiple tiers via a single bond region and through a bond-pad window.
Abstract:
The present invention provides a vertical seismic imaging apparatus and method for evaluation a reservoir. The invention includes a plurality of sensors disposed in a well borehole either permanently cemented in place or retrievably disposed using a series of clamps to attach the sensors to the borehole wall. Each sensor uses one or more forced balanced controlled accelerometers to detect acoustic energy in the formation.
Abstract:
An in-water distributed control system for use in marine seismic survey. The system includes a shipboard interface and power supply coupled to an in-water subsystem via a high bandwidth communication link. The in-water subsystem includes a remote control module for generating firing commands based on synchronizing and position parameters transmitted by the interface. The remote control module transmits power, data, and commands to a plurality of gun control modules. Each gun control module operates an air gun. An individually addressable remote cut-off valve controls air to each air gun. Depth and pressure at the gun control module is sensed by at least one DT/PT module. An optional expansion unit provides additional DT/PT capability.
Abstract:
The present invention provides an adaptive filtering method for substantially eliminating ground roll noise encountered during seismic data acquisition. An apparatus for acquiring seismic data is provided that includes an adaptive filtering circuit coupled to a multi-axis sensor device.